A foaming net automatic packaging machine for spherical fruits

Abstract

The present invention provides an automatic foaming net wrapping machine for spherical fruits, comprising a frame, a feeding mechanism, and a net wrapping preparation mechanism, a net lowering mechanism, a net cutting mechanism, a net expanding mechanism, a net wrapping mechanism, a conveying mechanism, a collecting mechanism, and a straightening mechanism disposed on the frame. The straightening mechanism, the net lowering mechanism, and the net expanding mechanism each comprise multiple units, each of which can wrap a spherical fruit with a net, and multiple spherical fruits can be wrapped with a net simultaneously. The straightening mechanism can accurately and quickly straighten the spherical fruit, reducing the difficulty of wrapping the net and improving the success rate of wrapping the net. The net lowering mechanism has a simple structure and stable movement. The net expanding mechanism and the net lowering mechanism are controlled by a screw slide and have high stability. The net cutting mechanism can quickly cut the net wrapping, and is more environmentally friendly than traditional electric heating wire net wrapping devices. The present invention has a simple structure, strong stability, and high working efficiency, and is suitable for the automatic wrapping of spherical fruits such as apples, citrus, and oranges.

Description

Technical Field

[0001] The invention belongs to the technical field of fruit packaging and relates to an automatic fruit packaging machine. Background Art

[0002] In recent years, the fruit industry has become the third largest planting industry after grain and vegetables, with its planting scale and output consistently ranking among the highest in the world. However, collisions and squeezing are inevitable during the transportation of spherical fruits, resulting in a fruit damage rate as high as 25-45%, seriously affecting fruit farmers' income.

[0003] In order to avoid damage to spherical fruits during transportation, they need to be wrapped in nets. The plastic foam packaging of spherical fruits has a certain degree of elasticity and softness, which can effectively play a cushioning and vibration-proof role, thereby avoiding damage to fruits caused by collision and squeezing during storage and transportation. In addition, plastic foam packaging also has excellent characteristics such as low cost, light weight, green, and cushioning and shock absorption.

[0004] When netting spherical fruit, the net needs to be cut to the appropriate length before being placed on the fruit. Manual netting is labor-intensive and inefficient, significantly limiting the development of the garden fruit industry. Current fruit packaging machines also have several issues. First, the loading technology is not mature enough, and the machine loading cannot guarantee the tilt of the spherical fruit. This often leads to packaging failures due to the distorted placement of the fruit during the netting process. Most net cutting mechanisms use electric heating wires, but these traditional methods can sometimes cause thermal deformation, deterioration of the cut surface, and poor cutting accuracy. The heating wire becomes brittle over time, and an oxide layer easily forms on the surface, preventing smooth net cutting. These issues result in low packaging efficiency, poor packaging quality, and inability to operate continuously. Summary of the Invention

[0005] In order to solve the problems described in the background technology, the present invention provides an automatic foaming net packaging machine for spherical fruits.

[0006] The technical solution of the present invention includes a frame, a feeding mechanism, and a net sleeve preparation mechanism, a net lowering mechanism, a net cutting mechanism, a net expanding mechanism, a net sleeve mechanism, a conveying mechanism, a collecting mechanism, and a straightening mechanism arranged on the frame.

[0007] The feeding mechanism is arranged on one side of the frame and is used for conveying the spherical fruits to the straightening mechanism in sequence; the straightening mechanism includes a straightening support frame, a straightening linear slide, an end effector, a suction cup, a straightening bowl, a straightening plate, a straightening ball and a straightening shaft; at least one group of parallel straightening linear slides is installed on the top of the straightening support frame, and a crossbeam is fixed on the movable end of each group of the straightening linear slides, and an end effector is fixed in the middle of the crossbeam, and a plurality of suction cups for sucking up the spherical fruits are connected to the bottom of the end effector; a plurality of straightening plates are fixed in the middle of the support frame, and straightening bowls corresponding to the positions and numbers of the suction cups are installed on the straightening plates; the straightening bowl is used for placing the spherical fruits, and the bottom of the straightening bowl is hollowed out and fits with the straightening ball; the straightening ball is installed on the straightening shaft, and the straightening shaft is used to make the straightening ball rotate.

[0008] The conveying mechanism is arranged on the side of the straightening mechanism, including a sprocket conveyor belt and a plurality of conveyor plates installed on the sprocket conveyor belt, and the conveyor plates are used to receive the spherical fruits sucked by the suction cups; the collecting mechanism is arranged below the sprocket conveyor belt of the conveying mechanism; the net sleeve preparation mechanism is used to convey the long net sleeve downward to the lower net mechanism; the lower net mechanism is used to convey the long net sleeve downward to the net expanding mechanism; the net cutting mechanism is arranged between the lower net mechanism and the net expanding mechanism, and includes an electric heating wire, two sets of spring buffers, two sliders and two slide rails fixed on the frame, the slider is installed on the slide rail, the spring buffer is installed on the slider, and the two ends of the electric heating wire are respectively fixed to the spring buffer The long strips of net sleeve are connected and cut through the forward and backward movement driven by the slider to obtain a net sleeve for sleeves of spherical fruits; the net expanding mechanism is located above the conveying mechanism, and includes a net expanding plate fixing frame, a screw slide and a plurality of net expanding plates for placing the net sleeve; the net expanding plate fixing frame is installed on the frame, and the net expanding plates are arranged and fixed on the net expanding plate fixing frame, and the net expanding plates expand outwards under the drive of the screw slide to open the net sleeve or shrink inwards to separate from the net sleeve; the net sleeve mechanism includes a mounting frame and a net sleeve linear slide; a net sleeve linear slide is installed on the side of the mounting frame along the vertical direction, the upper part of the mounting frame is fixedly connected to the net expanding plate fixing frame, and the movable end of the net sleeve linear slide is fixedly connected to the middle part of the net expanding plate fixing frame.

[0009] Furthermore, the mesh sleeve preparation mechanism includes a support seat, an optical axis and multiple sets of I-shaped wheels for placing the mesh sleeve, the support seat is installed at both ends of the optical axis, and the I-shaped wheels are installed on the optical axis at equal distances.

[0010] Furthermore, the lower net mechanism includes a lower net sprocket, a center column and two rubber rollers arranged side by side; the lower net sprocket is arranged at one end of the two rubber rollers; the center column is arranged between the two rubber rollers, and the center column includes a center column sleeve and a roller group arranged above and below both sides of the center column sleeve. The center column sleeve clamps the two rubber rollers through the roller group, and the two rubber rollers are driven by the lower net sprocket to move toward each other and utilize the friction transmission of the roller group of the center column to make the net sleeve move downward.

[0011] Furthermore, the straightening mechanism also includes a straightening sprocket, a support plate, a cylinder, a coupling, a bevel gear, a conveyor belt and a straightening motor; the two ends of the straightening shaft are mounted on the support plate below it through supports; a cylinder is installed below the support plate to make it rise and fall; straightening sprockets are installed on both sides of the straightening plate; the straightening shaft includes an X-direction straightening shaft and a Y-direction straightening shaft arranged side by side, the Y-direction straightening shaft is connected to the straightening motor through a coupling, and the X-direction straightening shaft and the Y-direction straightening shaft are connected through a conveyor belt; the straightening ball includes an X-direction straightening ball and a Y-direction straightening ball, the X-direction straightening ball is installed on the X-direction straightening shaft, and the Y-direction straightening ball is vertically mounted on the Y-direction straightening shaft through a connecting rod and a bevel gear.

[0012] Furthermore, the feeding mechanism includes a feeding frame, a feeding sprocket, a roller, a height-limiting brush, a feeding track and a front baffle; feeding sprockets are installed on the two inner side walls of the upper part of the feeding frame; the roller is installed between the two sets of feeding sprockets; the height-limiting brush is installed above the roller; one end of the feeding sprocket is in contact with one end of the feeding track, and the other end of the feeding track is provided with a front baffle.

[0013] The control part of the present invention adopts PLC to control the movement of each component.

[0014] When the packaging machine of the present invention is in use, first, a feeding mechanism collects and feeds spherical fruits; a suction cup grabs the spherical fruits and puts them into the squaring material bowl of the squaring mechanism, and the squaring ball below the squaring material bowl rotates to align them, and then the suction cup sucks and puts them into the conveying mechanism; the conveying mechanism first conveys the spherical fruits to the position directly below the expanding net plate of the expanding net mechanism, and at the same time, the net sleeve preparation mechanism installs the long net sleeve and conveys it to the lower net mechanism, and the lower net mechanism conveys the net sleeve downward by the friction between the rubber roller group and the net sleeve, so that the net sleeve is sleeved on the expanding net plate of the expanding net mechanism directly below the lower net mechanism; a net cutting mechanism is located between the lower net mechanism and the expanding net mechanism, and the net cutting mechanism cuts the net sleeve between the lower net mechanism and the expanding net mechanism; the expanding net mechanism opens the net sleeve through the expanding net plate, drives the expanding net plate to move downward through the net sleeve mechanism, and sleeves the net sleeve on the outer side of the spherical fruits on the conveying mechanism, and the spherical fruits sleeved with the net sleeve fall into the collecting mechanism through the movement of the conveying mechanism; then the packaging machine returns to the initial device and performs the next round of sleeves for the spherical fruits.

[0015] Compared with the prior art, the present invention comprises a plurality of units in the straightening mechanism, the net lowering mechanism and the net expanding mechanism, each of which can net a spherical fruit, so that a plurality of spherical fruits can be netted at the same time; the straightening mechanism can straighten the spherical fruit accurately and quickly, thereby reducing the difficulty of netting and improving the success rate of netting; the net lowering mechanism drives the net sleeve to open downward and be netted on the net expanding plate by the opposite movement of the rubber rollers, and has a simple structure and stable movement; the net expanding mechanism and the net lowering mechanism are controlled by a screw slide and have high stability; the net cutting mechanism can quickly cut the net sleeve, and is more environmentally friendly than the traditional electric heating wire net cutting device; the present invention has a simple structure, strong stability and high working efficiency, and is suitable for the automatic netting of spherical fruits such as apples, citrus and oranges. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the automatic packaging machine.

[0017] Figure 2 It is a structural diagram of the feeding mechanism and the straightening mechanism.

[0018] Figure 3 Schematic diagram of the structure of the mesh preparation mechanism.

[0019] Figure 4 It is a structural diagram of the net-laying mechanism.

[0020] Figure 5 It is a structural diagram of the cutting mechanism.

[0021] Figure 6 It is a structural diagram of the network expansion mechanism and the network installation mechanism.

[0022] Figure 7 It is a structural diagram of the conveying mechanism.

[0023] Figure 8 It is a structural diagram of the straightening mechanism.

[0024] Figure 9 It is a schematic diagram of the local structure of the straightening mechanism.

[0025] Figure 10 It is a schematic diagram of the local structure of the straightening mechanism.

[0026] Figure 11 It is a structural diagram of the feeding mechanism.

[0027] Description of reference numerals:

[0028] 1-frame; 2-net set preparation mechanism; 21-support seat; 22-I-shaped pulley; 23-optical axis; 3-net lowering mechanism; 31-net lowering sprocket; 32-center column; 33-rubber roller; 4-net cutting mechanism; 41-slider; 42-spring; 43-spring bracket; 44-anti-slider; 45-heating wire; 46-bolt; 5-net expansion mechanism; 51-net expansion plate motor; 52-net expansion plate; 53-screw slide; 54-net expansion plate fixing bracket; 6-net set mechanism; 61-mounting frame; 62-net set linear slide; 63-net set motor; 7-conveying mechanism; 71-conveying sprocket; 72-material bowl; 8-collecting mechanism; 9-straightening mechanism; 91 -Aligning support frame; 92-Aligning linear slide; 93-End effector; 94-Suction cup; 95-Aligning bowl; 96-Aligning plate; 97-Aligning sprocket; 98-Aligning ball; 981-X-direction aligning ball; 982-Y-direction aligning ball; 99-Aligning shaft; 991-X-direction aligning shaft; 992-Y-direction aligning shaft; 910-Support plate; 911-Cylinder; 912-Coupling; 913-Bevel gear; 914-Conveyor belt; 915-Aligning motor; 10-Feeding mechanism; 101-Feeding sprocket; 102-Drum roller; 103-Height limit brush; 104-Feeding track; 105-Front baffle; 106-Feeding frame. DETAILED DESCRIPTION

[0029] The following describes the implementation of the present invention in detail with reference to the accompanying drawings. However, these embodiments do not limit the present invention and are merely examples. The advantages of the present invention will be more clearly understood through the description. All variations that can be directly derived or associated with the contents disclosed by a person skilled in the art should be considered to be within the scope of protection of the present invention. The positional relationships described in the embodiments are consistent with those shown in the accompanying drawings, and other parts not described in detail in the embodiments are all prior art.

[0030] like Figure 1 As shown, the automatic packaging machine consists of a frame 1, a loading mechanism 10, and a net cover preparation mechanism 2, a net lowering mechanism 3, a net cutting mechanism 4, a net expanding mechanism 5, a net covering mechanism 6, a conveying mechanism 7, a collecting mechanism 8, and a straightening mechanism 9. The frame 1 can be constructed of aluminum profiles or welded from steel.

[0031] like Figure 1 and Figure 2 As shown, the feeding mechanism 10 is arranged on one side of the frame 1 and is used to sequentially convey the spherical fruits to the straightening mechanism 9.

[0032] The structure of the feeding mechanism 10 is as follows: Figure 11As shown, the feeding mechanism 10 consists of a feeding frame 106, a feeding sprocket 101, a roller shaft 102, a height limiting brush 103, a feeding track 104 and a front baffle 105; feeding sprockets 101 are installed on the two inner side walls of the upper part of the feeding frame 106; the roller shaft 102 is installed between the two sets of feeding sprockets 101; the height limiting brush 103 is installed above the roller shaft 102; one end of the feeding sprocket 101 is in contact with one end of the feeding track 104, and the other end of the feeding track 104 is provided with a front baffle 105.

[0033] The structure of the straightening mechanism 9 is as follows: Figure 8 、 Figure 9 and Figure 10 As shown, the straightening mechanism 9 consists of a straightening support frame 91, a straightening linear slide 92, an end effector 93, a suction cup 94, a straightening bowl 95, a straightening plate 96, a straightening sprocket 97, a straightening ball 98 and a straightening shaft 99, a support plate 910, a cylinder 911, a coupling 912, a bevel gear 913, a conveyor belt 914 and a straightening motor 915.

[0034] like Figure 8 As shown, at least one group of parallel linear slides 92 is installed at the top of the support frame 91, and a crossbeam is fixed on the movable end of each group of linear slides 92, and an end effector 93 is fixed in the middle of the crossbeam. The bottom of the end effector 93 is connected to a plurality of suction cups 94 for sucking spherical fruits; a plurality of aligning plates 96 are fixed in the middle of the support frame 91, and aligning bowls 95 corresponding to the positions and numbers of the suction cups 94 are installed on the aligning plates 96; the aligning bowls 95 are used to place spherical fruits, and the bottom of the aligning bowls 95 is hollowed out and fits with the aligning balls 98; the aligning balls 98 are installed on the aligning shaft 99, and the aligning shaft 99 is used to make the aligning balls 98 rotate.

[0035] like Figure 9 and Figure 10 As shown, both ends of the aligning shaft 99 are mounted on a support plate 910 below it through supports; a cylinder 911 is installed below the support plate 910 to enable it to rise and fall; aligning sprockets 97 are installed on both sides of the aligning plate 96; the aligning shaft 99 includes an X-direction aligning shaft 991 and a Y-direction aligning shaft 992 arranged side by side, the Y-direction aligning shaft 992 is connected to a aligning motor 915 through a coupling 912, and the X-direction aligning shaft 991 and the Y-direction aligning shaft 992 are connected through a conveyor belt 914; the aligning ball 98 includes an X-direction aligning ball 981 and a Y-direction aligning ball 982, the X-direction aligning ball 981 is mounted on the X-direction aligning shaft 991, and the Y-direction aligning ball 982 is vertically mounted on the Y-direction aligning shaft 992 through a connecting rod and a bevel gear 913.

[0036] The conveying mechanism 7 is arranged on the side of the straightening mechanism 9, as shown in FIG. Figure 7As shown, the conveying mechanism 7 is composed of a sprocket conveyor belt 71 and a plurality of conveying trays 72 installed on the sprocket conveyor belt 71. The conveying trays 72 are used to receive the spherical fruits sucked by the suction cups 94.

[0037] The collecting mechanism 8 is disposed below the sprocket conveyor 71 of the conveying mechanism 7 .

[0038] The net preparation mechanism 2 is used to transport the long net downward to the net lowering mechanism 3. Figure 3 As shown, the mesh preparation mechanism 2 consists of a support seat 21, an optical axis 23 and multiple sets of I-shaped wheels 22 for placing the mesh. The support seat 21 is installed at both ends of the optical axis 23, and the I-shaped wheels 22 are installed on the optical axis 23 at equal distances.

[0039] The net lowering mechanism 3 is used to transport the long net sleeve downward to the net expanding mechanism 5, such as Figure 4 As shown, the net lowering mechanism 3 consists of a net lowering sprocket 31, a center column 32 and two rubber rollers 33 arranged side by side; the center column 32 is arranged between the two rubber rollers 33, and the center column 32 includes a center column sleeve and roller groups arranged above and below both sides of the center column sleeve. The center column sleeve clamps the two rubber rollers 33 through the roller group, and the two rubber rollers 33 are driven by the net lowering sprocket 31 to move toward each other and use the friction transmission of the roller group of the center column 32 to make the net sleeve move downward.

[0040] The net cutting mechanism 4 is arranged between the net lowering mechanism 3 and the net expanding mechanism 5. Figure 5 As shown, it consists of a heating wire 45, two sets of spring buffers, two sliders 41 and two slide rails fixed to the frame 1. The sliders 41 are installed on the slide rails, and the spring buffers are installed on the sliders 41. The two ends of the heating wire 45 are respectively fixedly connected to the spring buffers and the sliders 41 drive the back and forth movement to cut the long strip of net to obtain a net for fitting spherical fruits.

[0041] The net expansion mechanism 5 is located above the conveying mechanism 7. Figure 6 As shown, it consists of a mesh expansion plate motor 51, a mesh expansion plate fixing frame 54, a screw slide 53 and multiple groups of mesh expansion plates 52 for placing mesh sleeves; the mesh expansion plate fixing frame 54 is installed on the frame 1, and the mesh expansion plates 52 are arranged and fixed on the mesh expansion plate fixing frame 54. The mesh expansion plates 52 are driven by the screw slide 53 to expand outward to open the mesh sleeve or contract inward to separate from the mesh sleeve. The screw slide 53 is driven by the mesh expansion plate motor 51.

[0042] like Figure 6As shown, the net-wrapping mechanism 6 consists of a mounting frame 61, a net-wrapping linear slide 62 and a net-wrapping motor 63; a net-wrapping linear slide 62 is installed on the side of the mounting frame 61 along the vertical direction, the upper part of the mounting frame 61 is fixedly connected to the net-expanding plate fixing frame 54, the movable end of the net-wrapping linear slide 62 is fixedly connected to the middle part of the net-expanding plate fixing frame 54, and the net-wrapping linear slide 62 is driven by the net-wrapping motor 63 so that the net-expanding plate fixing frame 54 can move up and down.

[0043] The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present application, and should all be included in the scope of protection of the present application.

Claims

1. A foaming net automatic packaging machine for spherical fruits, characterized by: It comprises a frame (1), a feeding mechanism (10), and a net-covering preparation mechanism (2), a net-discharging mechanism (3), a net-cutting mechanism (4), a net-expanding mechanism (5), a net-covering mechanism (6), a conveying mechanism (7), a collecting mechanism (8), and a straightening mechanism (9) arranged on the frame (1); The feeding mechanism (10) is arranged on one side of the frame (1) and is used to sequentially transport the spherical fruits to the straightening mechanism (9); The alignment mechanism (9) comprises an alignment support frame (91), an alignment linear slide (92), an end effector (93), a suction cup (94), an alignment bowl (95), an alignment plate (96), an alignment ball (98) and an alignment shaft (99); at least one set of parallel alignment linear slides (92) is mounted on the top of the alignment support frame (91), a crossbeam is fixed on the movable end of each set of the alignment linear slides (92), an end effector (93) is fixed in the middle of the crossbeam, and the bottom of the end effector (93) is connected to the end effector (93). A plurality of suction cups (94) for sucking spherical fruits are connected; a plurality of aligning plates (96) are fixed to the middle of the aligning support frame (91); aligning bowls (95) corresponding to the positions and numbers of the suction cups (94) are mounted on the aligning plates (96); the aligning bowls (95) are used to place spherical fruits; the bottom of the aligning bowls (95) is hollowed out and fits with the aligning balls (98); the aligning balls (98) are mounted on the aligning shaft (99), and the aligning shaft (99) is used to make the aligning balls (98) rotate; The alignment mechanism (9) further comprises an alignment sprocket (97), a support plate (910), a cylinder (911), a coupling (912), a bevel gear (913), a conveyor belt (914) and an alignment motor (915); both ends of the alignment shaft (99) are mounted on the support plate (910) below the alignment shaft via supports; a cylinder (911) for raising and lowering the alignment shaft (910) is mounted below the support plate (910); alignment sprockets (97) are mounted on both sides of the alignment plate (96); the alignment shaft (99) comprises X-direction alignment shafts (991) arranged side by side. and a Y-direction aligning shaft (992), the Y-direction aligning shaft (992) being connected to the aligning motor (915) via a coupling (912), the X-direction aligning shaft (991) and the Y-direction aligning shaft (992) being connected via a conveyor belt (914); the aligning ball (98) comprising an X-direction aligning ball (981) and a Y-direction aligning ball (982), the X-direction aligning ball (981) being mounted on the X-direction aligning shaft (991), and the Y-direction aligning ball (982) being vertically mounted on the Y-direction aligning shaft (992) via a connecting rod and a bevel gear (913); The conveying mechanism (7) is arranged on the side of the straightening mechanism (9), and includes a sprocket conveyor belt (71) and a plurality of conveying trays (72) mounted on the sprocket conveyor belt (71), wherein the conveying trays (72) are used to receive the spherical fruits sucked by the suction cups (94); The collecting mechanism (8) is arranged below the sprocket conveyor belt (71) of the conveying mechanism (7); The net sleeve preparation mechanism (2) is used to transport the long net sleeve downward to the net lowering mechanism (3); the net sleeve preparation mechanism (2) comprises a support seat (21), an optical axis (23) and a plurality of I-shaped wheels (22) for placing the net sleeve, the support seat (21) is mounted on both ends of the optical axis (23), and the I-shaped wheels (22) are mounted on the optical axis (23) at equal distances; The net lowering mechanism (3) is used to transport the long net sleeve downward to the net expanding mechanism (5); The net cutting mechanism (4) is arranged between the net lowering mechanism (3) and the net expanding mechanism (5), and comprises a heating wire (45), two sets of spring buffers, two sliders (41), and two slide rails fixed on the frame (1); the sliders (41) are mounted on the slide rails, the spring buffers are mounted on the sliders (41), and the two ends of the heating wire (45) are respectively fixedly connected to the spring buffers and driven by the sliders (41) to move back and forth to cut the long strip of net to obtain a net for fitting spherical fruits; The net expansion mechanism (5) is located above the conveying mechanism (7), and comprises a net expansion plate fixing frame (54), a screw slide (53) and a plurality of net expansion plates (52) for placing the net sleeve; the net expansion plate fixing frame (54) is mounted on the frame (1), and the net expansion plates (52) are arranged and fixed on the net expansion plate fixing frame (54); the net expansion plates (52) are driven by the screw slide (53) to expand outwards to open the net sleeve or to contract inwards to separate from the net sleeve; The net-wrapping mechanism (6) comprises a mounting frame (61) and a net-wrapping linear slide (64); a net-wrapping linear slide (64) is mounted on the side of the mounting frame (61) along a vertical direction, the upper portion of the mounting frame (61) is fixedly connected to the net-expanding plate fixing frame (54), and the movable end of the net-wrapping linear slide (64) is fixedly connected to the middle portion of the net-expanding plate fixing frame (54).

2. The foaming net automatic packaging machine for spherical fruits according to claim 1, characterized in that: The net lowering mechanism (3) comprises a net lowering sprocket (31), a center column (32) and two rubber rollers (33) arranged side by side; the net lowering sprocket (31) is arranged at one end of the two rubber rollers (33); the center column (32) is arranged between the two rubber rollers (33); the center column (32) comprises a center column sleeve and roller groups arranged above and below both sides of the center column sleeve; the center column sleeve clamps the two rubber rollers (33) through the roller groups; the two rubber rollers (33) are driven by the net lowering sprocket (31) to move toward each other and utilize friction transmission of the roller group of the center column (32) to cause the net sleeve to move downward.

3. The foaming net automatic packaging machine for spherical fruits according to claim 1 or 2, characterized in that: The feeding mechanism (10) comprises a feeding frame (106), a feeding sprocket (101), a roller shaft (102), a height-limiting brush (103), a feeding track (104) and a front baffle (105); feeding sprockets (101) are mounted on both inner side walls of the upper portion of the feeding frame (106); the roller shaft (102) is mounted between the two sets of feeding sprockets (101); the height-limiting brush (103) is mounted above the roller shaft (102); one end of the feeding sprocket (101) abuts against one end of the feeding track (104), and the other end of the feeding track (104) is provided with a front baffle (105).

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