A receiving net gun

Abstract

The utility model relates to automatic packaging technical field, concretely relates to a kind of net sleeve device of receiving type, including bottom plate, disc, driving rod, distance increasing lever and net sleeve support rod etc., bottom plate is pivotally connected with disc, distance increasing lever is formed fulcrum by hinging, transmission rod is arranged in waist-shaped hole and can slide rotation, gathers reset spring and makes support rod gather fully. By driving rod and external wedge block cooperation, the diameter of inscribed circle of support rod and opening speed are adjusted to adapt to different target objects;Solve the problem that the net sleeve of prior art is difficult to put on, relies on additional removal device, and has poor adaptability, with the advantages of compact structure, stable operation, strong adaptability and good protection effect.

Description

Technical Field

[0001] This utility model relates to the field of automated packaging technology, specifically to a receiving-type netting device. Technical Background

[0002] In 2014, the inventors disclosed a fruit and vegetable netting unit under publication number CN103786914A, which uses a four-claw head assembly to open the netting. However, in practical applications, it has the following key drawbacks: ① The initial netting is difficult to insert. Even after the four claws of the opening mechanism are fully retracted, the outer diameter D2 of their circumscribed circle is still relatively large. Figure 3 As shown, the netting should be at least half the diameter D1 of the fully opened circumscribed circle. A larger circumscribed circle diameter requires the netting to have a greater expansion range to fit onto the claw, making it prone to jamming or even impossible to fit smoothly, severely limiting the applicability of the netting. ② Reliance on an additional removal device. A special netting remover is needed to remove the expanded netting from the claw and place it on the target object. This additional removal device not only increases the complexity of the equipment structure but also increases the number of potential failure points due to the linkage of multiple components, reducing netting efficiency. ③ Single-fruit positioning relies on an independent tray. A separate tray is needed to support the target object. If the diameter of the target object varies significantly, different sized trays must be used, resulting in poor compatibility. Summary of the Invention

[0003] To address the aforementioned deficiencies or one of the deficiencies in the existing technology, this utility model provides a receiving-type netting device, the technical solution of which is as follows:

[0004] A receiving-type netting device includes a rectangular base plate and a disc. Unlike existing technologies, the center of the base plate and the center of the disc are pivotally connected. An outwardly extending drive rod is fixed to the outer peripheral wall of the disc. The base plate has three or more oblong holes, evenly distributed around the center of the disc, with the length of the holes extending radially along the disc. It also includes an increasing-pitch lever equal in number to the oblong holes. One end of each increasing-pitch lever is fixedly connected to a downwardly extending transmission rod, and the other end is fixedly connected to an upwardly extending netting support rod. The transmission rod passes through the corresponding oblong hole and can slide and rotate freely along the length of the oblong hole. The disc and each increasing-pitch lever are hinged near the transmission rod to form a lever fulcrum. A convergence and return spring is disposed between the base plate and the increasing-pitch lever on the rear side of the drive rod. Under the elastic force of the convergence and return spring, all netting support rods can fully converge near the center of the disc.

[0005] Furthermore, the free end of the drive rod cooperates with a wedge block disposed outside the netting device to form a cam transmission mechanism; when the netting device moves along a predetermined trajectory, the free end of the drive rod contacts the wedge surface of the wedge block and generates relative sliding; by adjusting the vertical distance between the highest and lowest points of the wedge block along the inclined direction, the rotation angle of the drive rod during the movement is changed, thereby adjusting the inscribed circle diameter of the netting support rod to adapt to target objects of different diameters; by adjusting the inclination angle of the wedge surface of the wedge block, the rotational speed of the drive rod when it moves with the netting device is changed, thereby adjusting the opening speed of the netting support rod.

[0006] Furthermore, when all the net sleeve support rods are fully converged near the center of the disc, the drive rod is located near the shortest distance between the disc and the short side of the base plate, and the free end of the drive rod extends out of the short side of the base plate; when the net sleeve moves along the predetermined trajectory until the free end of the drive rod rotates counterclockwise to just retract into the range of the base plate, all the net sleeve support rods simultaneously and fully open, at which time the diameter of the inscribed circle of the net sleeve support rod is the maximum diameter of the target object that the net sleeve can support.

[0007] Furthermore, when all the mesh support rods are fully gathered, a limiting rod is fixed on the base plate to abut against the rear side of the extension lever, so as to limit the excessive rotation of the extension lever and prevent the mesh support rods from expanding in the opposite direction.

[0008] Furthermore, it also includes an open state locking mechanism, which includes: ratchet teeth circumferentially formed on the edge of the disc opposite the drive rod; a swing lever hinged to the base plate in the middle, the inner end of the swing lever having a pawl portion that can engage with the ratchet teeth, and the outer end extending beyond the base plate to form an operating end; and a pawl return spring disposed between the swing lever and the base plate, and located at the hinge near the operating end; the pawl return spring can apply a spring force to the swing lever to keep the pawl portion engaged with the ratchet teeth, thereby fixing the rotational position of the disc and locking the open state of the mesh support rod.

[0009] Furthermore, it also includes an opening state release mechanism, which includes a stop block disposed outside the netting device; when the netting device moves along a predetermined trajectory until the stop block abuts against the operating end of the swing lever, the swing lever rotates counterclockwise around its central hinge point, causing the pawl to overcome the elastic force of the pawl return spring and disengage from the ratchet, thereby releasing the rotational lock on the disc and thus releasing the opening state lock of the netting support rod.

[0010] Furthermore, two sliding pins are fixedly installed on the two short sides of the base plate, and one insert is hinged to each of the four corners of the base plate; each sliding pin forms a sliding engagement with the slide rail outside the netting device, and the path of the slide rail constitutes the predetermined movement trajectory of the netting device; each insert can be inserted into the gap between the links of the external transmission chain of the netting device to form a meshing engagement; through the guiding engagement between the sliding pin and the slide rail and the transmission action between the insert and the transmission chain, the netting device is driven to move directionally along the predetermined trajectory; when the slide rail is a ring structure, the netting device can cycle repeatedly along the ring predetermined trajectory.

[0011] Furthermore, the mesh support rod is covered with a flexible anti-collision sleeve, which is used to prevent the mesh support rod from directly and rigidly contacting the target object.

[0012] Furthermore, it also includes a lifting net-pushing mechanism, comprising a rectangular lifting plate, with axially vertical linear bearings fixed at the four corners of the lifting plate, each linear bearing slidingly engaging with a corresponding guide rod, the lower end of which is fixedly connected to the base plate; the lifting plate has lifting plate slots adapted to the number of net sleeve support rods, the trajectory of each lifting plate slot being adapted to the opening and closing stroke of the corresponding net sleeve support rod; each of the two short sides of the lifting plate is fixedly provided with an upper sliding pin, each upper sliding pin forming a sliding engagement with the lifting slide rail outside the net sleeve device, the path of the lifting slide rail forming a predetermined lifting trajectory of the lifting plate, so that while the lifting plate moves synchronously with the base plate along the predetermined trajectory, it can also generate vertical displacement relative to the base plate, thereby pushing the net sleeve opened on the net sleeve support rod along the support rod axis and sleeved on the outer periphery of the target object.

[0013] Furthermore, a flexible anti-collision plate is fixedly installed on the lifting plate. The anti-collision plate has an anti-collision plate slot that corresponds to the position of the slot on the lifting plate and is adapted in shape, as well as a clearance hole that matches the gap of the guide rod.

[0014] The beneficial technical effects of this utility model mainly include the following:

[0015] 1. Reduced initial insertion difficulty of the net sleeve and expanded applicability: Through the cooperation of the distance-extending lever structure and the convergence and return spring, the net sleeve support rod can fully converge towards the center of the disc under the elastic force of the convergence and return spring, significantly reducing the outer diameter of the net sleeve support rod in the converged state. Compared with the existing technology where the outer diameter is still relatively large after the claw head retracts, this structure greatly reduces the expansion required when inserting the net sleeve, reduces jamming problems during insertion, and improves the adaptability to net sleeves of different specifications.

[0016] 2. No additional removal device required, simplifying the structure and improving efficiency: Through the linkage design of the extension lever and the subsequent lifting net pushing mechanism, the open net sleeve can be directly pushed away along the axis of the support rod and placed on the target object by the movement of the structure itself. This avoids the dependence on the independent net sleeve removal device in the existing technology, reduces the number of equipment parts and failure points, simplifies the overall structure, and improves the net placement efficiency.

[0017] 3. Enhanced adaptability to target objects and reduced auxiliary positioning components: By cooperating with the drive rod and the wedge block, the inner circle diameter of the net sleeve support rod can be flexibly adjusted to adapt to target objects of different diameters. Unlike existing technologies, it does not rely on independent trays or frequent tray replacements, thus improving adaptability to target objects with large diameter differences and reducing operational complexity.

[0018] 4. Compact structure and stable linkage, improving operational reliability: The structure adopts pivot rotation, hinged lever, return spring and other structures to realize the linkage of each component, ensuring that the gathering and opening actions of the net sleeve support are precise and controllable; at the same time, through auxiliary structures such as limit rods and locking mechanisms, the stability and safety of the operation process are further guaranteed, reducing the occurrence of abnormal working conditions. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the receiving netting device of this utility model.

[0020] Figure 2 yes Figure 1 A structural diagram from another perspective.

[0021] Figure 3 This is a structural schematic diagram of the lifting net pushing mechanism of this utility model.

[0022] Figure 4 This is a schematic diagram of a state when the receiving netting device and the lifting net pushing mechanism are combined.

[0023] Figure 5 This is a schematic diagram of another state when the receiving netting device and the lifting net pushing mechanism are combined.

[0024] Figure 6 This is another schematic diagram showing the combination of the receiving netting device and the lifting net pushing mechanism. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings.

[0026] like Figure 1-6As shown, a receiving-type netting device 100 includes a rectangular base plate 101 and a disc 102. The center of the base plate 101 and the center of the disc 102 are pivotally connected. An outwardly extending drive rod 103 is fixedly mounted on the outer peripheral wall of the disc 102. The base plate 101 has four oblong holes 1011, which are evenly distributed around the center of the disc 102, and the length of the oblong holes 1011 extends radially along the disc 102. It also includes four pitch-extending levers 104, one end of which is fixedly connected to a downwardly extending transmission rod. 105, with an upwardly extending mesh support rod 106 fixedly connected to the other end; the transmission rod 105 passes through the corresponding waist-shaped hole 1011 and can slide along the length direction of the waist-shaped hole 1011 and rotate freely; the disc 102 and each extension lever 104 are hinged to form a lever fulcrum near the transmission rod 105; a convergence and return spring 107 is arranged between the base plate 101 on the rear side of the drive rod 103 and the extension lever 104, and under the elastic force of the convergence and return spring 107, all the mesh support rods 106 can be fully converged near the center of the disc 102.

[0027] The working principle of this utility model is based on the synergistic effect of lever linkage and elastic reset, which realizes the precise opening and closing of the net sleeve support rod and the efficient placement of the net sleeve. The specific process is as follows:

[0028] 1. Initial convergence state: Under the elastic force of the convergence return spring 107, the extension lever 104 is pulled towards the rear of the base plate 101, causing each mesh sleeve support rod 106 to converge towards the center of the disk 102. At this time, the transmission rod 105 is positioned close to the center of the disk within the oblong hole 1011. The oblong hole 1011 forms a radial guiding constraint on the transmission rod 105, ensuring that the mesh sleeve support rod 106 is stably converged in the central area, facilitating the pre-installation of the mesh sleeve on the mesh sleeve support rod 106.

[0029] 2. Driving the opening process: When an external force drives the drive rod 103, the disc 102 rotates around the pivot of the base plate 101. Since the extension lever 104 and the disc 102 are hinged near the transmission rod 105 to form a lever fulcrum, the rotation of the disc 102 will drive the extension lever 104 to rotate around the fulcrum. At this time, the transmission rod 105 slides away from the center of the disc under the radial guidance of the oblong hole 1011, while the other end of the extension lever 104 connected to the net sleeve support rod 106 swings outward, causing the net sleeve support rod 106 to open synchronously, realizing the opening action of the net sleeve. At this time, the opened net sleeve forms a space to accommodate the target object, which is convenient for the target object to be put in. It can also be combined with the lifting net pushing mechanism described later to push the net sleeve away along the support rod and put it on the target object.

[0030] 3. Elastic reset process: When the driving force is removed, the elastic force of the convergence reset spring 107 is restored, pulling the extension lever 104 to rotate in the opposite direction. The transmission rod 105 slides back to the initial position near the center of the disc along the waist-shaped hole 1011. The net sleeve support rod 106 re-converges towards the center under the linkage of the lever, completing one opening and closing cycle and preparing for the next net sleeve installation.

[0031] Throughout the process, the radial guidance of the waist-shaped hole 1011, the fulcrum design of the distance-increasing lever 104, and the elasticity of the gathering and resetting spring 107 ensure the stability, synchronicity, and controllability of the opening and closing action of the net sleeve support rod 106, realizing the complete process from the net sleeve being put on, expanding and adapting to the final placement of the target object.

[0032] In another preferred embodiment, the free end of the drive rod 103 cooperates with a wedge block disposed outside the receiving net sleeve 100 to form a cam transmission mechanism; when the receiving net sleeve 100 moves along a predetermined trajectory, the free end of the drive rod 103 contacts the wedge surface of the wedge block and generates relative sliding; by adjusting the vertical distance between the highest and lowest points of the wedge block along the inclined direction, the rotation angle of the drive rod 103 during the movement is changed, thereby adjusting the inner circle diameter of the net sleeve support rod 106 to adapt to target objects of different diameters; by adjusting the inclination angle of the wedge surface of the wedge block, the rotation speed of the drive rod 103 when moving with the receiving net sleeve 100 is changed, thereby adjusting the opening speed of the net sleeve support rod 106. The drive rod and wedge block work together to form a cam transmission mechanism. Its working principle is as follows: when the mesh sleeve moves along a predetermined trajectory, the free end of the drive rod contacts and slides relative to the wedge surface of the wedge block. By adjusting the vertical distance (height difference) between the highest and lowest points of the wedge block along the inclined direction, the rotation angle of the drive rod is changed, thereby adjusting the diameter of the inscribed circle of the mesh sleeve support rod to adapt to target objects of different diameters. Furthermore, by adjusting the inclination angle of the wedge surface of the wedge block, the rotation speed of the drive rod is changed, thus controlling the opening speed of the mesh sleeve support rod. The beneficial effects are the ability to flexibly adapt to the diameter of the target object and precisely control the opening speed, improving the adaptability of the mesh sleeve to different working conditions.

[0033] In another preferred embodiment, when all the netting support rods 106 are fully converged near the center of the disk 102, the drive rod 103 is located near the shortest distance between the disk 102 and the short side of the base plate 101, and the free end of the drive rod 103 extends out of the short side of the base plate 101; when the receiving netting device 100 moves along a predetermined trajectory until the free end of the drive rod 103 rotates counterclockwise and just retracts into the range of the base plate 101, all the netting support rods 106 simultaneously and fully open. At this time, the inscribed circle diameter of the netting support rod 106 is the maximum diameter of the target object that the receiving netting device 100 can receive. Its working principle is that when the netting support rods are fully converged, the drive rod is located near the shortest distance between the disk and the short side of the base plate, and its free end extends out of the base plate; when the netting device moves along a predetermined trajectory until the free end of the drive rod rotates counterclockwise and retracts into the range of the base plate, the netting support rods simultaneously and fully open to the maximum inscribed circle diameter. The beneficial effect is that it clarifies the positional benchmark of the maximum opening state of the net sleeve support rod, and allows for intuitive judgment of the support rod status through the position of the drive rod, ensuring that the maximum size of the target object can be controlled and improving operational reliability.

[0034] In another preferred embodiment, when all the mesh support rods 106 are fully converged, a limiting rod 108 is fixed on the base plate 101 to abut against the rear side of the extending lever 104, thereby limiting excessive rotation of the extending lever 104 and preventing the mesh support rods 106 from expanding in the opposite direction. Its working principle is that when all the mesh support rods are fully converged, the limiting rod on the base plate abuts against the rear side of the extending lever, limiting excessive rotation of the extending lever in a direction away from the center of the disc. The beneficial effect is that it effectively prevents the mesh support rods from expanding in the converged state due to abnormal external force or spring force, ensuring the structural stability of the converged state and avoiding ineffective friction or damage between components.

[0035] In another preferred embodiment, an open state locking mechanism is further included. This mechanism comprises: ratchet teeth 1021 circumferentially formed along the edge of the disc 102 opposite to the drive rod 103; a swing lever 109 hinged to the base plate 101 at its center, the inner end of which has a pawl portion capable of engaging the ratchet teeth 1021, and the outer end extending beyond the base plate 101 to form an operating end; and a pawl return spring 110 disposed between the swing lever 109 and the base plate 101, located at the hinge point near the operating end. The pawl return spring 110 applies a spring force to the swing lever 109, keeping the pawl portion engaged with the ratchet teeth 1021 to fix the rotational position of the disc 102, thereby locking the open state of the mesh support rod 106. The working principle of the open state locking mechanism is that the pawl portion of the swing lever continuously engages with the ratchet teeth on the edge of the disc under the spring force of the pawl return spring, locking the open state of the mesh support rod by fixing the rotational position of the disc. The beneficial effect is that it can stably maintain the open posture of the netting support rod, avoid accidental retraction caused by external disturbance or spring force decay, ensure the structural stability of the target object during the netting process, and improve operational safety.

[0036] In another preferred embodiment, an opening state release mechanism is further included. This mechanism includes a stop block disposed outside the receiving netting device 100. When the receiving netting device 100 moves along a predetermined trajectory until the stop block abuts against the operating end of the swing lever 109, the swing lever 109 rotates counterclockwise around its central hinge point. This causes the pawl to overcome the spring force of the pawl return spring 110 and disengage from the ratchet tooth 1021, releasing the rotational lock on the disc 102 and thus releasing the opening state lock on the netting support rod 106. The working principle of the opening state release mechanism is that when the receiving netting device moves along a predetermined trajectory to the stop block, the stop block abuts against the operating end of the swing lever, pushing the swing lever to rotate counterclockwise. This causes the pawl to overcome the spring force and disengage from the ratchet tooth, releasing the rotational lock on the disc. The beneficial effect is that it achieves automatic release of the opening state without manual operation. State switching is completed through trajectory linkage, adapting to automated production processes, reducing manual intervention, and improving work efficiency.

[0037] In another preferred embodiment, two sliding pins 111 are fixedly provided on the two short sides of the base plate 101, and one insert 113 is hinged to each of the four corners of the base plate 101; each sliding pin 111 forms a sliding fit with the slide rail outside the receiving netting device 100, and the path of the slide rail constitutes the predetermined movement trajectory of the receiving netting device 100; each insert 113 can be inserted into the gap between the links of the transmission chain outside the receiving netting device 100 to form a meshing fit; through the guiding fit between the sliding pins 111 and the slide rail and the transmission action between the inserts 113 and the transmission chain, the receiving netting device 100 is driven to move directionally along the predetermined trajectory; when the slide rail is a ring structure, the receiving netting device 100 can cyclically run along the ring predetermined trajectory. Its working principle is that the sliding pins on the base plate slide and engage with the external slide rail to achieve guidance. The inserts at the four corners are inserted into the gaps between the links of the transmission chain to form a meshing transmission, which together drive the netting device to move in a predetermined direction along the trajectory. When the slide rail has a circular structure, the netting device can run cyclically along the circular trajectory. The beneficial effect is that the dual cooperation of "guidance + transmission" ensures the stability and orientation accuracy of the movement. The circular trajectory supports continuous operation, meets the needs of batch production, and improves the continuous operation capability of the equipment.

[0038] In another preferred embodiment, the netting support rod 106 is covered with a flexible anti-collision sleeve 112. The anti-collision sleeve 112 is used to prevent the netting support rod 106 from directly and rigidly contacting the target object. The flexible anti-collision sleeve covering the netting support rod has no complex working principle; it mainly isolates the netting support rod from the target object through the flexible material. The beneficial effect is that it avoids direct rigid contact between the netting support rod and the target object, effectively protecting fragile target objects such as fruits and precision parts from collision damage, improving the safety of the netting process and the integrity of the target object.

[0039] In another preferred embodiment, a lifting net pushing mechanism 200 is further included, comprising a rectangular lifting plate 201. Vertical linear bearings 202 are fixed at the four corners of the lifting plate 201, and each linear bearing 202 is slidably engaged with a corresponding guide rod 203. The lower end of the guide rod 203 is fixedly connected to the base plate 101. The lifting plate 201 has lifting plate slots 2011 adapted to the number of net sleeve support rods 106. The trajectory of each lifting plate slot 2011 corresponds to the opening and closing of the corresponding net sleeve support rod 106. The lifting plate 201 has two short sides, each with a fixed upper sliding pin 204. Each upper sliding pin 204 slides in conjunction with the lifting rail outside the receiving net holder 100. The path of the lifting rail forms a predetermined lifting trajectory for the lifting plate 201, allowing the lifting plate 201 to move synchronously along the predetermined trajectory with the base plate 101 while simultaneously moving vertically relative to the base plate 101. This pushes the net holder on the net holder support rod 106 away along the support rod axis and places it around the target object. The working principle of the lifting net pushing mechanism is that the lifting plate slides along the guide rod via a linear bearing. The upper sliding pins cooperate with the external lifting rail, allowing the lifting plate to move synchronously along the predetermined trajectory with the base plate while simultaneously moving vertically. The groove on the lifting plate adapts to the support rod stroke and pushes the net holder away along the support rod axis, ultimately placing it around the target object. The beneficial effects are that the integrated netting removal function eliminates the need for an additional removal device, simplifies the equipment structure, reduces potential failure points, and achieves an integrated action of "spreading open - pushing netting - setting netting", thereby improving netting efficiency.

[0040] In another preferred embodiment, a flexible anti-collision plate 205 is fixedly disposed on the lifting plate 201. The anti-collision plate 205 has an anti-collision plate slot 2051 that corresponds to the position and shape of the lifting plate slot 2011, and an avoidance hole that fits with the guide rod 203 with a clearance. The flexible anti-collision plate on the lifting plate has no complicated working principle. It is fixed to the lifting plate and moves with it by opening an anti-collision plate slot corresponding to the lifting plate slot and a guide rod avoidance hole. The beneficial effect is that the flexible material buffers the contact between the lifting plate and the target object or other components, further protecting the target object and the mechanism itself from collision damage, and enhancing the safety and reliability of equipment operation.

[0041] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A receiving-type netting device (100), comprising a rectangular base plate (101) and a disc (102), characterized in that: The center of the base plate (101) is pivotally connected to the center of the disk (102); an outwardly extending drive rod (103) is fixedly provided on the outer peripheral wall of the disk (102); the base plate (101) has three or more oblong holes (1011), each oblong hole (1011) is evenly distributed around the center of the disk (102), and the length direction of the oblong holes (1011) extends radially along the disk (102); it also includes an increasing lever (104) equal in number to the oblong holes (1011), one end of each increasing lever (104) is fixedly connected to a downwardly extending transmission rod (105), and the other end is fixedly connected to... The device is connected to an upwardly extending mesh support rod (106); the transmission rod (105) passes through the corresponding waist-shaped hole (1011) and can slide and rotate freely along the length direction of the waist-shaped hole (1011); the disc (102) and each extension lever (104) are hinged to form a lever fulcrum near the transmission rod (105); a gathering and return spring (107) is arranged between the bottom plate (101) on the rear side of the drive rod (103) and the extension lever (104), and under the elastic force of the gathering and return spring (107), all the mesh support rods (106) can be fully gathered near the center of the disc (102).

2. The receiving-type netting device (100) according to claim 1, characterized in that: The free end of the drive rod (103) cooperates with the wedge block disposed outside the receiving net sleeve (100) to form a cam transmission mechanism; when the receiving net sleeve (100) moves along a predetermined trajectory, the free end of the drive rod (103) contacts the wedge surface of the wedge block and generates relative sliding; by adjusting the vertical distance between the highest and lowest points of the wedge block along the inclined direction, the rotation angle of the drive rod (103) during the movement is changed, thereby adjusting the inner circle diameter of the net sleeve support rod (106) to adapt to target objects of different diameters; by adjusting the inclination angle of the wedge surface of the wedge block, the rotation speed of the drive rod (103) when moving with the receiving net sleeve (100) is changed, thereby adjusting the opening speed of the net sleeve support rod (106).

3. The receiving-type netting device (100) according to claim 2, characterized in that: When all the net sleeve support rods (106) are fully converged near the center of the disk (102), the drive rod (103) is located near the shortest distance between the disk (102) and the short side of the base plate (101), and the free end of the drive rod (103) extends out of the short side of the base plate (101); when the receiving net sleeve device (100) moves along a predetermined trajectory until the free end of the drive rod (103) rotates counterclockwise to just retract into the range of the base plate (101), all the net sleeve support rods (106) open fully at the same time. At this time, the diameter of the inscribed circle of the net sleeve support rod (106) is the maximum diameter of the target object that the receiving net sleeve device (100) can receive.

4. The receiving-type netting device (100) according to claim 1, characterized in that: When all the net sleeve support rods (106) are fully gathered, a limiting rod (108) is fixed on the base plate (101) to abut against the rear side of the extension lever (104) to limit the excessive rotation of the extension lever (104) and prevent the net sleeve support rods (106) from expanding in the opposite direction.

5. The receiving-type netting device (100) according to claim 1, characterized in that: It also includes an open state locking mechanism, which includes: a ratchet (1021) circumferentially opened on the edge of the disc (102) opposite to the drive rod (103); a swing lever (109) hinged to the base plate (101) in the middle, the inner end of the swing lever (109) having a pawl portion that can engage with the ratchet (1021), and the outer end extending out of the base plate (101) to form an operating end; and a pawl return spring (110) disposed between the swing lever (109) and the base plate (101) and located at the hinge near the operating end; the pawl return spring (110) can apply a spring force to the swing lever (109) to keep the pawl portion engaged with the ratchet (1021) to fix the rotational position of the disc (102) and thereby lock the open state of the net sleeve support rod (106).

6. The receiving-type netting device (100) according to claim 5, characterized in that: It also includes an opening state release mechanism, which includes a stop block disposed outside the receiving net sleeve (100); when the receiving net sleeve (100) moves along a predetermined trajectory until the stop block abuts against the operating end of the swing lever (109), the swing lever (109) rotates counterclockwise around its central hinge point, causing the pawl to overcome the elastic force of the pawl return spring (110) and disengage from the ratchet (1021), thereby releasing the rotational lock on the disc (102) and thus releasing the opening state lock of the net sleeve support rod (106).

7. The receiving-type netting device (100) according to claim 1, characterized in that: Two sliding pins (111) are fixedly installed on the two short sides of the base plate (101), and one insert (113) is hinged to each of the four corners of the base plate (101). Each sliding pin (111) forms a sliding fit with the slide rail outside the receiving netting device (100), and the path of the slide rail constitutes the predetermined movement trajectory of the receiving netting device (100). Each insert (113) can be inserted into the gap between the links of the transmission chain outside the receiving netting device (100) to form a meshing fit. Through the guiding fit between the sliding pin (111) and the slide rail and the transmission action between the insert (113) and the transmission chain, the receiving netting device (100) is driven to move directionally along the predetermined trajectory. When the slide rail is a ring structure, the receiving netting device (100) can run cyclically along the ring predetermined trajectory.

8. A receiving-type netting device (100) according to claim 1, characterized in that: The mesh support rod (106) is covered with a flexible anti-collision sleeve (112), which is used to prevent the mesh support rod (106) from directly and rigidly contacting the target object.

9. A receiving-type netting device (100) according to claim 1, characterized in that: It also includes a lifting net pushing mechanism (200), including a rectangular lifting plate (201), with axially vertical linear bearings (202) fixed at the four corners of the lifting plate (201), each linear bearing (202) slidingly engaging with a corresponding guide rod (203), the lower end of the guide rod (203) being fixedly connected to the base plate (101); the lifting plate (201) is provided with lifting plate slots (2011) adapted to the number of net sleeve support rods (106), the trajectory of each lifting plate slot (2011) being related to the opening and closing of the corresponding net sleeve support rod (106). The lifting plate (201) is adapted to the two short sides of the lifting plate (201) and each of the two short sides is fixedly provided with an upper sliding pin (204). Each upper sliding pin (204) is in sliding fit with the lifting slide rail outside the receiving net sleeve (100). The path of the lifting slide rail constitutes the predetermined lifting trajectory of the lifting plate (201). While the lifting plate (201) moves synchronously with the base plate (101) along the predetermined trajectory, it can generate vertical displacement relative to the base plate (101), thereby pushing the net sleeve opened on the net sleeve support rod (106) away along the support rod axis and sleeved on the outer periphery of the target object.

10. A receiving-type netting device (100) according to claim 9, characterized in that: A flexible anti-collision plate (205) is fixedly installed on the lifting plate (201). The anti-collision plate (205) has an anti-collision plate slot (2051) that corresponds to the position of the lifting plate slot (2011) and is adapted in shape, as well as a clearance hole that is fitted with the guide rod (203).

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