Turntable loading device for automatic flower sorting

Abstract

The utility model discloses a turntable feeding device for automatic flower sorting, comprising: a support frame, a first mounting plate is provided on the support frame; a first driving assembly is mounted on the first mounting plate; a feeding transmission assembly is connected to the first driving assembly, and a second driving assembly is mounted on the first mounting plate; a turntable picking assembly, the second driving assembly is connected to the turntable picking assembly so that the turntable picking assembly picks up flowers from the feeding transmission assembly by rotating, and sends the flowers into a carrier on a conveying track; a flower pushing assembly, the flower pushing assembly can push the flowers transported to the rear end of the feeding transmission assembly to the turntable picking assembly. By setting the turntable picking assembly, the flowers picked up from the feeding transmission assembly are sent into the carrier by rotating, and the feeding trajectory is a curved feeding, which can better cooperate with the high-speed movement of the carrier, is conducive to improving the working efficiency of the automation equipment, the stability of feeding, and reducing the probability of flower damage.

Description

Technical Field

[0001] The utility model relates to the technical field of automatic flower sorting, in particular to a turntable feeding device for automatic flower sorting. Background Art

[0002] The automatic flower sorting system generally includes a conveyor track and a loading device. The loading device feeds the flowers one by one into the carrier of the conveyor track, and the conveyor track transports the flowers to the next link. The existing loading method of the loading device is: when the flowers reach the rear end of the loading device, the cylinder is extended to push the flowers toward the carrier. Since the conveyor track drives the carrier to move at a high height, with this existing loading method, when the carrier is about to reach the loading device, the moving speed of the carrier must be reduced, otherwise, the flowers will not easily enter the carrier in a high-speed moving state. The existing loading method not only reduces the conveying efficiency of the conveyor track, but also makes it difficult to align the flowers when they are fed into the carrier. Utility Model Content

[0003] In order to solve the technical problems existing in the prior art, the utility model provides a turntable loading device for automatic flower sorting, which can realize loading without reducing the moving speed of the carrier through structural improvement.

[0004] The utility model solves the technical problem by adopting a technical solution: a turntable feeding device for automatic flower sorting and selection, comprising:

[0005] A support frame, which is located on one side of the conveying track, and a first mounting plate is provided on the support frame;

[0006] a first drive assembly mounted on the first mounting plate;

[0007] A material feeding transmission assembly connected to the first driving assembly, wherein the material feeding transmission assembly is located below the first mounting plate;

[0008] a second drive assembly mounted on the first mounting plate;

[0009] A turntable material-retrieving assembly, which is located below the first mounting plate and at the rear end of the feeding transmission assembly, and the second driving assembly is connected to the turntable material-retrieving assembly so that the turntable material-retrieving assembly picks up flowers from the feeding transmission assembly by rotating and delivers the flowers to a carrier on the conveying track;

[0010] A flower pushing assembly is connected to the second driving assembly, and the flower pushing assembly can push the flowers conveyed to the rear end of the feeding transmission assembly toward the turntable material taking assembly.

[0011] Furthermore, the turntable material picking assembly includes: a cam, a turntable, a first blocking arm and a second blocking arm, the turntable is connected to the second driving assembly, the first blocking arm is connected to the turntable via a first pin, the second blocking arm is connected to the turntable via a second pin, and the first blocking arm and the second blocking arm can swing relative to the turntable.

[0012] Furthermore, a groove is provided on the cam, one end of the first blocking arm is connected to a first follower, one end of the second blocking arm is connected to a second follower, the first follower and the second follower are located in the groove and can move along the track of the groove.

[0013] Furthermore, the groove includes: a first section, a second section, a third section and a fourth section which are connected end to end in sequence, and the trajectories of the first section, the second section, the third section and the fourth section are different.

[0014] Furthermore, the turntable includes: a main body, a first material trough and a second material trough, the first material trough and the second material trough are integrally formed with the main body, and the first material trough and the second material trough are centrally symmetrically arranged along the center point of the main body.

[0015] Furthermore, the first blocking arm includes: a first arm segment, a second arm segment and a third arm segment, the first arm segment and the third arm segment are respectively fixedly connected to two ends of the second arm segment, the first arm segment and the second arm segment are arranged at an obtuse angle, and the second arm segment and the third arm segment are arranged at an obtuse angle.

[0016] Furthermore, a first through hole is formed at one end of the first arm segment away from the second arm segment, and a second through hole is formed at the connection between the first arm segment and the second arm segment.

[0017] Furthermore, a second mounting plate is connected below the first mounting plate, and the cam is connected to the second mounting plate.

[0018] Furthermore, the second driving assembly includes: a second motor, a first driving shaft and a second driving shaft, the second motor is mounted on the first mounting plate, the second motor can drive the first driving shaft and the second driving shaft to rotate, the upper and lower ends of the first driving shaft respectively pass through the first mounting plate and the second mounting plate, the upper and lower ends of the second driving shaft respectively pass through the first mounting plate and the second mounting plate, the lower end of the first driving shaft is connected to the turntable, and the lower end of the second driving shaft is connected to the flower pushing assembly.

[0019] Furthermore, the output shaft of the second motor passes through the first mounting plate, the output shaft of the second motor is provided with a driving gear, the first drive shaft is provided with a first driven gear, the second drive shaft is provided with a second driven gear, the first driven gear and the second driven gear are both meshed with the driving gear, and the number of teeth of the first driven gear is twice the number of teeth of the second driven gear.

[0020] The beneficial effect of the utility model is that the turntable feeding device of the utility model, by setting a turntable feeding component, can feed the flowers picked up from the feeding transmission component into the carrier in a rotating manner, and the feeding trajectory is a curved feeding, which can better cooperate with the high-speed movement of the carrier, which is beneficial to improving the working efficiency of the automation equipment, the stability of the feeding, and reducing the probability of damage to the flowers. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0022] Figure 1 It is an overall schematic diagram of the turntable feeding device of the utility model.

[0023] Figure 2 It is a three-dimensional schematic diagram of a turntable feeding device (with a hidden support frame) of the utility model.

[0024] Figure 3 It is a stereoscopic diagram of the turntable feeding device (with the support frame hidden) of the utility model from another perspective.

[0025] Figure 4 It is a structural schematic diagram of a turntable material taking component of the utility model.

[0026] Figure 5 It is a structural schematic diagram of the first barrier arm of the utility model.

[0027] Figure 6 It is a structural schematic diagram of the groove of the utility model.

[0028] Figure 7 It is a structural schematic diagram of the second drive assembly of the utility model.

[0029] Figure 8 It is a structural schematic diagram of the flower pushing assembly of the utility model.

[0030] Fig. 9 It is a schematic diagram of a state in which the first follower of the utility model is located in the first section.

[0031] Fig.10 It is a schematic diagram of a state in which the first material taking trough of the utility model has picked up flowers from the feeding transmission component.

[0032] Fig.11It is a schematic diagram of the state in which the first follower of the utility model begins to enter the second stage.

[0033] Fig.12 It is a schematic diagram of a state in which the first follower of the utility model is located in the second section.

[0034] Fig.13 It is a schematic diagram of a state in which the first follower of the utility model is located at the third section and the flower reaches the second position.

[0035] Fig.14 It is a schematic diagram of the state in which the first follower of the utility model is located in the fourth section (the first material taking chute is fully opened).

[0036] Fig.15 It is a schematic diagram of a state in which the first follower of the utility model enters the first section from the fourth section.

[0037] Fig.16 It is a schematic diagram of a fresh flower branch of the utility model gradually entering a card slot of a carrier.

[0038] In the figure: 100, carrier; 1, support frame; 2, first mounting plate; 3, first drive assembly; 4, feeding transmission assembly; 5, second drive assembly; 6, turntable material taking assembly; 7, flower pushing assembly; 8, second mounting plate; 9, third mounting plate; 41, transition block; 42, baffle; 51, second motor; 52, first drive shaft; 53, second drive shaft; 531, eccentric push block; 54, driving gear; 55, first driven gear; 56, second driven gear; 61, cam; 62, turntable; 63, first blocking arm; 64, second blocking arm; 65, first pin ; 66. second pin; 611. groove; 67. first follower; 68. second follower; 621. main body; 622. first material trough; 623. second material trough; 6111. first section; 6112. second section; 6113. third section; 6114. fourth section; 631. first arm section; 632. second arm section; 633. third arm section; 634. first through hole; 635. second through hole; 71. translation mounting block; 72. first slide rail; 73. cylinder; 74. second slide rail; 75. push flower connecting block; 76. push flower sheet metal; 77. connecting rod. DETAILED DESCRIPTION

[0039] Now the utility model is further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.

[0040] In the description of the present utility model, it is necessary to understand that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0041] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] like Figures 1 to 16 As shown, the turntable feeding device of the utility model comprises: a support frame 1, a first driving assembly 3, a feeding transmission assembly 4, a second driving assembly 5, a turntable picking assembly 6 and a flower pushing assembly 7. The support frame 1 is located at one side of the conveying track, and a first mounting plate 2 is provided on the support frame 1; the first driving assembly 3 is mounted on the first mounting plate 2; the feeding transmission assembly 4 is connected to the first driving assembly 3, and the feeding transmission assembly 4 is located below the first mounting plate 2; the second driving assembly 5 is mounted on the first mounting plate 2; the turntable picking assembly 6 is located below the first mounting plate 2 and at the rear end of the feeding transmission assembly 4, and the second driving assembly 5 is connected to the turntable picking assembly 6 so that the turntable picking assembly 6 picks up flowers from the feeding transmission assembly 4 by rotation and sends the flowers into the carrier 100 on the conveying track; the flower pushing assembly 7 is connected to the second driving assembly 5, and the flower pushing assembly 7 can push the flowers transported to the rear end of the feeding transmission assembly 4 to the turntable picking assembly 6.

[0043] In other words, the staff puts the flowers into the front end of the feeding transmission component 4, the feeding transmission component 4 transmits the flowers to the rear end, and the flowers at the rear end are pushed to the turntable material taking component 6 by the flower pushing component 5. After the turntable material taking component 6 picks up the flowers, it is sent into the carrier 100 by rotating. The utility model can realize the loading without reducing the moving speed of the carrier 100 through structural improvement, does not affect the conveying efficiency of the conveying track, and can also improve the feeding efficiency of flowers.

[0044] Specifically, the turntable material taking assembly 6 includes: a cam 61, a turntable 62, a first blocking arm 63 and a second blocking arm 64. The turntable 62 is connected to the second driving assembly 5. The first blocking arm 63 is connected to the turntable 62 through a first pin 65. The second blocking arm 64 is connected to the turntable 62 through a second pin 66. The first blocking arm 63 and the second blocking arm 64 can swing relative to the turntable 62. A groove 611 is provided on the cam 61. One end of the first blocking arm 63 is connected to a first follower 67. One end of the second blocking arm 64 is connected to a second follower 68. The first follower 67 and the second follower 68 are located in the groove 611 and can move along the track of the groove 611. The turntable 62 includes: a body 621 , a first material trough 622 and a second material trough 623 . The first material trough 622 and the second material trough 623 are integrally formed with the body 621 . The first material trough 622 and the second material trough 623 are centrally symmetrically arranged along the center point of the body 621 .

[0045] It should be noted that the second driving assembly 5 can drive the rotating disk 62 to rotate. When the rotating disk 62 rotates, the first blocking arm 63 and the second blocking arm 64 can be driven to move, and the first follower 67 and the second follower 68 can move along the track of the groove 611. With the rotation of the rotating disk 62 and the swing of the first blocking arm 63 and the second blocking arm 64, the first material taking trough 622 and the second material taking trough 623 can be switched between the open state and the closed state.

[0046] Specifically, the groove 611 includes: a first section 6111, a second section 6112, a third section 6113 and a fourth section 6114 which are connected end to end. The trajectories of the first section 6111, the second section 6112, the third section 6113 and the fourth section 6114 are different. Assume that the inflection points of the groove 611 are point A, point B, point C and point D respectively. Figure 7In the counterclockwise direction, the first section 6111 is between point D and point A, the second section 6112 is between point A and point B, the third section 6113 is between point B and point C, and the fourth section 6114 is between point C and point D. In other words, the groove 611 is not a circular groove, and the shape of the groove 611 needs to satisfy the first blocking arm 63 and the first material hopper 622 (the second blocking arm 64 and the second material hopper 623) when picking up flowers from the feeding transmission component 4, and gradually closes after picking up, and can automatically open again when connecting with the carrier 100.

[0047] The first blocking arm 63 and the second blocking arm 64 have the same structure, and the first blocking arm 63 is taken as an example for specific description. The first blocking arm 63 includes: a first arm segment 631, a second arm segment 632 and a third arm segment 633. The first arm segment 631 and the third arm segment 633 are respectively fixedly connected to the two ends of the second arm segment 632, and the first arm segment 631 and the second arm segment 632 are arranged at an obtuse angle, and the second arm segment 632 and the third arm segment 633 are arranged at an obtuse angle. A first through hole 634 is provided at one end of the first arm segment 631 away from the second arm segment 632, and a second through hole 635 is provided at the connection between the first arm segment 631 and the second arm segment 632. The first follower 67 passes through the first through hole 634, and the first pin 65 passes through 635. The first pin 65 is a fulcrum of the first blocking arm 63. When the turntable 62 rotates, the first blocking arm 63 is driven to move together through the first pin 65. When the first follower 67 moves in the groove 611, the position and angle of the third arm segment 633 can be changed, so that the first material trough 622 is switched between an open state and a closed state.

[0048] Specifically, the second mounting plate 8 is connected below the first mounting plate 2, and the cam 61 is connected to the second mounting plate 8. The second driving assembly 5 includes: a second motor 51, a first driving shaft 52 and a second driving shaft 53. The second motor 51 is installed on the first mounting plate 2. The second motor 51 can drive the first driving shaft 52 and the second driving shaft 53 to rotate. The upper and lower ends of the first driving shaft 52 respectively penetrate the first mounting plate 2 and the second mounting plate 8. The upper and lower ends of the second driving shaft 53 respectively penetrate the first mounting plate 2 and the second mounting plate 8. The lower end of the first driving shaft 52 is connected to the rotating disk 62, and the lower end of the second driving shaft 53 is connected to the flower pushing assembly 7. The output shaft of the second motor 51 penetrates the first mounting plate 2. The output shaft of the second motor 51 is provided with a driving gear 54, the first driving shaft 52 is provided with a first driven gear 55, and the second driving shaft 53 is provided with a second driven gear 56. The first driven gear 55 and the second driven gear 56 are both meshed with the driving gear 54, and the number of teeth of the first driven gear 55 is twice the number of teeth of the second driven gear 56.

[0049] When the second motor 51 is started, the driving gear 54 can drive the first driven gear 55 and the second driven gear 56 to rotate, thereby driving the first driving shaft 52 and the second driving shaft 53 to rotate. The first driving shaft 52 can drive the rotating disk 62 to rotate. The second driving shaft 52 can drive the flower pushing assembly 7 to move forward and backward.

[0050] Specifically, the pushing flower assembly 7 includes: a translation mounting block 71, a first slide rail 72, a cylinder 73, a second slide rail 74, a pushing flower connecting block 75 and a pushing flower sheet metal 76. The lower end of the second drive shaft 52 is connected to an eccentric push block 521. The translation mounting block 71 is connected to the eccentric push block 521 through a connecting rod 77. A third mounting plate 9 is also provided below the first mounting plate 2. The first slide rail 72 is arranged on the third mounting plate 9. The slider of the first slide rail 72 can move in the front and rear directions. The translation mounting block 71 is connected to the slider of the first slide rail 72. The cylinder 73 and the second slide rail 74 are both connected to the lower end surface of the translation mounting block 71. The output end of the cylinder 73 is connected to the pushing flower connecting block 75. The slider of the second slide rail 74 is connected to the pushing flower connecting block 75. The pushing flower sheet metal 76 is connected to the pushing flower connecting block 75.

[0051] When the cylinder 73 is extended and retracted, it can drive the flower pushing connection block 75 and the flower pushing sheet metal 76 to move in the left and right directions. The flower pushing sheet metal 76 is located below the feeding transmission component 4. The feeding transmission component 4, for example, transmits flowers through a belt. The first driving component 3 can drive the belt of the feeding transmission component 4 to rotate, thereby driving the flowers to move. When the flowers are moved to the rear end of the feeding transmission component 4, the flower pushing sheet metal 76 extends, and then the flower pushing sheet metal 76 is driven to move backward through the rotation of the second driving shaft 52 to push the flowers to the turntable 62. For example, a transition block 41 is provided at the rear end of the feeding transmission component 4, and a baffle 42 is connected to the transition block 41. When the flower pushing sheet metal 76 pushes the flowers, the baffle 42 can prevent the flowers from being over-pushed.

[0052] Please refer to Figures 9 to 16 , the working process of the utility model is:

[0053] Flowers are placed one by one into the feeding transmission assembly 4, and the flowers are transmitted from the front end of the feeding transmission assembly 4 to the first position at the rear end (at this time, the flowers are still clamped between the belts).

[0054] The cylinder 73 drives the flower-pushing sheet metal 76 to extend, and at this time, the flower-pushing sheet metal 76 is located at the front end of the flower. Then, the flower-pushing sheet metal 76 is driven to move backward by the second driving shaft 52 to push the flower toward the baffle 42. At this time, the flower branches of the flower are sandwiched between the baffle 42 and the flower-pushing sheet metal 76.

[0055] As the rotating disk 62 rotates, when the first follower 67 is located in the first section 6111, the first blocking arm 63 will not seal the opening of the first material trough 622. When the first follower 67 enters the second section 6112, the first blocking arm 63 begins to seal the opening of the first material trough 622. When the first follower 67 leaves the second section 6112 and enters the third section 6113, the first blocking arm 63 has blocked the flower branches of the fresh flowers in the first material trough 622. When the first follower 67 is located in the third section 6113, the flower branches of the fresh flowers are always in a blocked state. When the first follower 67 begins to enter the fourth section 6114, the first blocking arm 63 gradually opens the opening of the first material trough 622. When the first follower 67 leaves the fourth section 6114, the first material trough 622 is completely opened.

[0056] When the first follower 67 is located at the junction of the fourth section 6114 and the first section 6111, the flowers are in the second position. At this time, with the rotation of the turntable 62 and the movement of the carrier 100, the flowers gradually enter the card slot of the carrier 100 from the first material trough 622. It should be noted that the moving speed of the carrier 100 is greater than the rotation speed of the turntable 62. When the flowers enter the card slot of the carrier 100, the carrier 100 can quickly take the flowers away.

[0057] The first material taking trough 622 and the second material taking trough 623 take materials alternately.

[0058] In summary, the turntable loading device of the present invention, by setting a turntable picking component 6, can feed the flowers picked up from the feeding transmission component 4 into the carrier 100 in a rotating manner. The feeding trajectory is a curved feeding, which can better cooperate with the high-speed movement of the carrier 100, which is beneficial to improving the working efficiency of the automation equipment, the stability of the feeding, and reducing the probability of damage to the flowers.

[0059] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without departing from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A turntable feeding device for automatic flower sorting, characterized in that: include: A support frame (1) located on one side of the conveying track, wherein a first mounting plate (2) is provided on the support frame (1); A first drive assembly (3), which is mounted on the first mounting plate (2); A feeding transmission assembly (4), which is connected to the first driving assembly (3), and the feeding transmission assembly (4) is located below the first mounting plate (2); A second drive assembly (5) mounted on the first mounting plate (2); A turntable material picking assembly (6) is located below the first mounting plate (2) and at the rear end of the loading transmission assembly (4); the second driving assembly (5) is connected to the turntable material picking assembly (6) so that the turntable material picking assembly (6) picks up flowers from the loading transmission assembly (4) by rotating and delivers the flowers to a carrier (100) on the conveying track; A flower pushing assembly (7) is connected to the second driving assembly (5), and the flower pushing assembly (7) is capable of pushing the flowers conveyed to the rear end of the feeding transmission assembly (4) toward the turntable material taking assembly (6).

2. The turntable feeding device for automatic flower sorting as claimed in claim 1, characterized in that: The turntable material taking assembly (6) comprises: a cam (61), a turntable (62), a first blocking arm (63) and a second blocking arm (64); the turntable (62) is connected to the second driving assembly (5); the first blocking arm (63) is connected to the turntable (62) via a first pin (65); the second blocking arm (64) is connected to the turntable (62) via a second pin (66); the first blocking arm (63) and the second blocking arm (64) are capable of swinging relative to the turntable (62).

3. The turntable feeding device for automatic flower sorting as claimed in claim 2, characterized in that: The cam (61) is provided with a groove (611); one end of the first blocking arm (63) is connected to a first follower (67); one end of the second blocking arm (64) is connected to a second follower (68); the first follower (67) and the second follower (68) are located in the groove (611) and are capable of moving along the track of the groove (611).

4. The rotating disk feeding device for automatic flower sorting as claimed in claim 3, characterized in that: The groove (611) includes: a first section (6111), a second section (6112), a third section (6113) and a fourth section (6114) which are connected end to end in sequence, and the trajectories of the first section (6111), the second section (6112), the third section (6113) and the fourth section (6114) are different.

5. The rotating disk feeding device for automatic flower sorting as claimed in claim 2, characterized in that: The turntable (62) comprises: a main body (621), a first material taking trough (622) and a second material taking trough (623); the first material taking trough (622) and the second material taking trough (623) are integrally formed with the main body (621); the first material taking trough (622) and the second material taking trough (623) are centrally symmetrically arranged along the center point of the main body (621).

6. The rotating disk feeding device for automatic flower sorting as claimed in claim 2, characterized in that: The first blocking arm (63) comprises: a first arm segment (631), a second arm segment (632) and a third arm segment (633); the first arm segment (631) and the third arm segment (633) are respectively fixedly connected to two ends of the second arm segment (632); the first arm segment (631) and the second arm segment (632) are arranged at an obtuse angle; and the second arm segment (632) and the third arm segment (633) are arranged at an obtuse angle.

7. The rotating disk feeding device for automatic flower sorting as claimed in claim 6, characterized in that: A first through hole (634) is provided at one end of the first arm segment (631) away from the second arm segment (632), and a second through hole (635) is provided at the connection between the first arm segment (631) and the second arm segment (632).

8. The rotating disk feeding device for automatic flower sorting as claimed in claim 2, characterized in that: A second mounting plate (8) is connected below the first mounting plate (2), and the cam (61) is connected to the second mounting plate (8).

9. The rotating disk feeding device for automatic flower sorting as claimed in claim 8, characterized in that: The second driving assembly (5) comprises: a second motor (51), a first driving shaft (52) and a second driving shaft (53); the second motor (51) is mounted on the first mounting plate (2); the second motor (51) can drive the first driving shaft (52) and the second driving shaft (53) to rotate; the upper and lower ends of the first driving shaft (52) respectively pass through the first mounting plate (2) and the second mounting plate (8); the upper and lower ends of the second driving shaft (53) respectively pass through the first mounting plate (2) and the second mounting plate (8); the lower end of the first driving shaft (52) is connected to the turntable (62); and the lower end of the second driving shaft (53) is connected to the flower pushing assembly (7).

10. The rotating disk feeding device for automatic flower sorting as claimed in claim 9, characterized in that: The output shaft of the second motor (51) passes through the first mounting plate (2); a driving gear (54) is provided on the output shaft of the second motor (51); a first driven gear (55) is provided on the first driving shaft (52); a second driven gear (56) is provided on the second driving shaft (53); the first driven gear (55) and the second driven gear (56) are both meshed with the driving gear (54); the number of teeth of the first driven gear (55) is twice the number of teeth of the second driven gear (56).

Images