CN210565901U - Gate valve operating device for controlling interpolation and rice transplanter with gate valve operating device - Google Patents

Abstract

The utility model relates to the field, a gate valve operating device for controlling interpolation, which comprises a first rotating arm and a driving component, wherein the middle part of the first rotating arm is connected with a rotary valve core of the gate valve and rotates circumferentially and synchronously, and the driving component can drive the first rotating arm to rotate in a limited range in a one-way mode; the driving assembly comprises a driving block and a driving component which is connected to the driving block and acts on the driving block to move; the driving block is sleeved outside the rotary valve core, can rotate coaxially relative to the rotary valve core, and can act on the first rotating arm in a one-way mode to enable the first rotating arm to rotate in a one-way mode; the driving block is connected with an interpolation clutch driving rod of the rice transplanter through a linkage mechanism. A driving block in the gate valve operating device is connected with an interpolation clutch driving rod of the rice transplanter through a linkage mechanism, and when the driving block drives a first rotating arm to rotate, the engagement or disengagement of the interpolation clutch is controlled through the linkage mechanism, so that the insertion clutch and the seedling table are integrated in a lifting mode, the operating mechanism is simplified, and the use is convenient.

Description

Gate valve operating device for controlling interpolation and rice transplanter with gate valve operating device

Technical Field

The utility model relates to a field especially relates to a gate valve operating means of control interpolation, and have device's transplanter.

Background

The rice transplanter is a planting machine for planting rice seedlings in paddy fields, replaces the process of manual transplanting operation, improves the transplanting effect and transplanting quality to a certain extent, realizes reasonable close planting, realizes standard planting and is beneficial to mechanization of subsequent operation. When the transplanter works, seedlings are placed into the seedling box in order in a group state, the perilla seeds and the seedling box move transversely, the seedling taking device is enabled to divide the seedlings into a certain number of grids successively and take away the seedlings, the seedlings are inserted into soil according to the agricultural requirements under the action of the seedling transplanting track control mechanism, and the seedling taking device returns to the seedling box to take the seedlings according to a certain track.

When the transplanter does not work, the height of the seedling platform needs to be lifted by controlling the oil cylinder in a manual driving or electric driving mode. When the transplanter works, the height of the seedling platform is reduced, so that the floating plate on the seedling platform can be attached to the ground, and the floating plate feeds back and drives the oil cylinder to adjust the height of the seedling platform in real time according to the ground condition. For example, a novel hydraulic device for controlling the transplanting depth of a transplanter is recorded in the Chinese utility model patent publication with the publication number of CN201766838U, and the following scheme is disclosed: the oil tank comprises an oil tank body, wherein a rotary valve assembly and a pump end cover assembly are fixed on the front end surface and the rear end surface of the oil tank body, a gear pump assembly fixed on the pump end cover assembly in a threaded manner is positioned in the oil tank body, the pump end cover assembly comprises a pump end cover and a connecting disc fixed on the pump end cover, the pump end cover is in threaded connection with the rear end surface of the oil tank body, and a transmission shaft is installed in the connecting disc in a clearance fit manner; and the rear end of the gear pump assembly is exposed out of the rear end face of the connecting disc, the gear pump assembly comprises a gear pump body, a pair of driving gear and driven gear which are meshed with each other are arranged in a pump chamber of the gear pump body, a rear end shaft of the driving gear is inserted in a pump end cover in a clearance fit manner and is fixedly connected with the front end of the transmission shaft, and an overflow valve arranged in the gear pump body is communicated with the pump chamber through a process hole.

In addition, in the practical situation, the seedling platform is at the transplanting position in the process of transplanting by the transplanter; when the seedling platform goes up and down, the transplanting part should stop working, otherwise the safety accident is easy to occur. In the traditional transplanter equipment, when an operator operates a machine body to lift, the insertion clutch needs to be switched immediately, the operation is complex, errors are easy to occur, and potential safety hazards exist. Based on the above-mentioned disadvantages of the conventional rice transplanter, chinese patent publication No. CN109451940A discloses a double control link mechanism of a rice transplanter, which includes a handle, a bracket, a connecting plate, a connecting rod and a linkage part, and is connected to a hydraulic lift valve and a clutch through a hydraulic link and a clutch link, respectively. The double-control connecting rod mechanism of the rice transplanter realizes that the transplanting clutch handle and the machine body lifting handle are combined into a handle to control two mechanisms, simplifies the operating mechanism and is convenient for users to learn and use. The insertion clutch and the machine body lifting are integrated into the same operating handle, so that the safety performance is improved. Although the transplanter realizes the scheme of synchronous driving of transplanting clutch and body lifting, the scheme is suitable for a hand-held transplanter but not a high-speed transplanter. Therefore, for a high-speed transplanter, the application provides a gate valve operating device integrating transplanting clutch and machine body lifting.

Disclosure of Invention

In order to solve the above problem, a first object of the present invention is to provide a gate valve operating device, the driving block in this gate valve operating device passes through the interpolation clutch actuating lever that the link gear connects the transplanter, when the driving block drives first swinging boom pivoted, also through the meshing of link gear control interpolation clutch or break away from to plant separation and reunion and the integration of seedling stage lift, simplify operating device, convenient to use will be planted.

A second object of the present invention is to provide a rice transplanter having the above gate valve operating device.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a gate valve operating apparatus for controlling interpolation, characterized by: the device comprises a first rotating arm and a driving assembly, wherein the middle part of the first rotating arm is connected with a rotary valve core of the gate valve and rotates circumferentially and synchronously, and the driving assembly can drive the first rotating arm to rotate in a limited range in a one-way mode; the driving assembly comprises a driving block and a driving component which is connected to the driving block and acts on the driving block to move; the driving block is sleeved outside the rotary valve core, can rotate coaxially relative to the rotary valve core, and can act on the first rotating arm in a one-way mode to enable the first rotating arm to rotate in a one-way mode; the driving block is connected with an interpolation clutch driving rod of the rice transplanter through a linkage mechanism.

The above technical scheme is adopted in the utility model, this technical scheme relates to a control interpolation's door valve operating means, and this door valve operating means includes first swinging boom and drive assembly, wherein the middle part of first swinging boom with the rotary valve case of door valve is connected and drives the rotary valve case in step and rotates, and then control hydro-cylinder output quantity, final control seedling stage height. The driving assembly adopts a manual or electric driving end driven by external force and can unidirectionally drive the first rotating arm to rotate within a limited range; the driving assembly is used for lifting the height of the seedling platform when the seedling planting machine does not work. Furthermore, the driving block in the scheme is connected with an interpolation clutch driving rod of the rice transplanter through a linkage mechanism, when the driving block drives the first rotating arm to rotate, the engagement or disengagement of the interpolation clutch is controlled through the linkage mechanism, so that the insertion clutch and the seedling table are integrated in a lifting mode, the operation mechanism is simplified, and the rice transplanter is convenient to use.

Preferably, the linkage mechanism comprises a swing rod and a connecting rod assembly, the middle part of the swing rod is hinged to the rack, the connecting rod assembly is connected with the first end part of the swing rod, and the tail end of the connecting rod assembly is connected with the interpolation clutch driving rod; and the second end part of the swing rod is matched with the driving block by adopting a cam structure. The technical scheme specifically provides an implementable scheme of the linkage mechanism, wherein the middle part of a swing rod in the scheme is hinged on a rack, a driving block adopts a cam structure to drive the swing rod to swing along the hinged end of the swing rod, and the first end part of the swing rod drives a clutch driving rod through a connecting rod assembly to control the engagement or the disengagement of an interpolation clutch.

Preferably, the driving block is provided with a cam groove, and the second end of the swing rod is movably arranged in the cam groove of the driving block; and the second end part of the swing rod and the cam groove move relatively along with the rotation of the driving block. In the technical scheme, the specific implementation scheme of the cam structure is that the driving block is provided with a cam groove, and the second end part of the swing rod is attached to the cam groove, so that the cam driving structure is realized.

Preferably, the second end of the swing rod is provided with a roller, so that the roller is arranged in a cam groove of the driving block in a rolling manner; and concave parts for embedding and positioning the rollers are arranged at two ends of the cam groove. The concave parts at the two ends of the cam groove can position the roller so that the roller is maintained in a stable state at the two ends.

Preferably, the connecting rod assembly comprises a traction member connected with the first end part of the swing rod, and a connecting rod with a head end connected with the traction member and a tail end connected with the interpolation clutch driving rod.

Preferably, the outer edges of the driving blocks are toothed edges on the same circumferential line, and the driving part comprises driving teeth in meshing transmission with the toothed edges and a driving motor for driving the driving teeth to rotate. In the technical scheme, the driving part adopts a driving motor to realize electric control.

Preferably, the driving part further comprises a driving handle disposed on the driving block. In the technical scheme, the driving part adopts a driving handle to realize manual control.

Preferably, a pin shaft is arranged on the first rotating arm from the rotary valve core to the second end part; the driving end of the driving block can act on the pin shaft in a unidirectional mode to enable the first rotating arm to rotate in a unidirectional mode.

Preferably, the first rotating arm further comprises a limiting plate, at least one part of the limiting plate forms a limiting protrusion and is arranged on the rotating path of the pin shaft to limit the first rotating arm to rotate within a limiting range. In this embodiment, the range is limited to the specific embodiment.

A rice transplanter, characterized in that: including a gate valve operating means as described above.

Drawings

FIG. 1 is an overall schematic view of the rice transplanter according to the present invention.

Fig. 2 is a schematic structural view of a planting depth adjusting device on a seedling stage.

Fig. 3 is a schematic view showing the overall structure of the gate valve controlling apparatus.

Fig. 4 is a schematic view of a driving structure of the gate valve controlling means.

FIG. 5 is a schematic illustration of the portion of the gate valve control device connected to the interpolating clutch.

Fig. 6 is a schematic view of a driving block structure of the gate valve controlling apparatus.

FIG. 7 is a schematic view showing an external structure of the gate valve.

FIG. 8 is a schematic side cut-away view of a gate valve.

FIG. 9 is a first cross-sectional schematic view of the gate valve.

FIG. 10 is a second cross-sectional schematic view of the gate valve.

FIG. 11 is a schematic view of a rotary valve spool in a gate valve.

FIG. 12 is a schematic view of a hydraulic system for the rice transplanter.

Fig. 13 is a schematic structural diagram of the HST operating system.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "a plurality" means two or more unless explicitly defined otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

As shown in figures 1-13, the rice transplanter comprises a frame 11, a seedling platform 12 arranged at the rear side of the frame 11, an oil cylinder 2 for driving the seedling platform 12 to lift, a gate valve 3 for controlling the output quantity of the oil cylinder 2, and a gate valve operating device 4 for driving the gate valve 3. In general, the rice transplanter mainly comprises a power part and an inserting and planting part, wherein the power part comprises an engine, an HST (high speed railway), a gearbox, a chassis, a covering part, hydraulic pressure, electric appliances and the like. HST, a short term for hydrostatic continuously variable transmission, functions to control the output speed and direction of a hydraulic motor by changing the displacement of a pump through an integrated set of hydraulic devices. The power transmission route is as follows: engine-HST-gearbox-drive wheels. The interpolation part is generally divided into a gate valve control device 4, a gate valve 3, an oil cylinder 2, a seedling lifting table 12, an interpolation mechanism and the like; the gate valve control device 4 controls the gate valve 3 to operate, further controls the output quantity of the oil cylinder 2, so that the seedling table 12 is adjusted to lift, and the interpolator interpolates when the seedling table 12 is in a descending state. The interpolation mechanism in the interpolation part is not the innovation point of the application, so the description is omitted; specifically, the structure of the interpolation mechanism can be referred to the Chinese patent publication of the invention entitled "and an insertion mechanism of a rice transplanter" with the publication number "CN 109892081A" previously applied by the applicant.

As shown in figures 1 and 2, the seedling platform 12 of the rice transplanter is provided with a planting depth adjusting device which comprises a central floating plate assembly and a depth adjusting assembly which are arranged on a bracket of the seedling platform 12. The depth adjusting assembly comprises an adjusting shaft 51 positioned on the seedling platform bracket 121 and a handle 52 driving the adjusting shaft 51 to rotate. Specifically, the lower end of the handle 52 is connected to the adjusting shaft 51, and the handle 52 can drive the adjusting shaft 51 to rotate in a limited manner. An interpolation gear plate is arranged on the seedling table support 121, the handle 52 penetrates through the interpolation gear plate, and a plurality of gears are arranged on the interpolation gear plate and used for limiting the position of the handle 52.

The central floating plate assembly includes a central floating plate 54, the central floating plate 54 is connected with the adjusting shaft 51 through a first link 55, and the central floating plate 54 is connected with a seedling stage 12 elevation control system (the seedling stage elevation control system referred to herein is embodied as the gate valve operating device 4 in the present embodiment) through a pull rope assembly. The technical scheme relates to a planting depth adjusting device, wherein the planting depth adjusting device can act on a handle 52 through external force, the handle 52 drives an adjusting shaft 51 to rotate, so that a central floating plate 54 swings for a certain angle by taking the adjusting shaft 51 as an axis and a first connecting rod 55 as a swinging arm, and the height of the central floating plate 54 relative to a seedling platform support 121 is changed. In a specific embodiment, the middle of the central floating plate 54 is hinged with the first link 55, and the front end of the central floating plate 54 is connected with the seedling table 12 lifting control system through a pull rope assembly. In the technical scheme, the central floating plate 54 is of a lever-like structure, the middle part of the central floating plate 54 is hinged, the rear end part or the front end part of the central floating plate 54 is attached to the ground, along with the change of the height of the terrain, the central floating plate 54 swings by taking the hinge point of the middle part as the axis, the swing is amplified by the lever principle, and finally the swing is fed back to the lifting control system of the seedling table 12 through the pull rope assembly at the front end part.

On the basis of the scheme, a link mechanism is further arranged on the seedling platform support 121, and the adjusting shaft 51 is connected with the pull rope assembly through the link mechanism. The trailing end of the pull cord assembly is adjusted as the adjustment shaft 51 rotates. As described in the background art, the central floating plate 54 is attached to the ground, and the height of the ground is fed back to the lift control system of the seedling table 12 through the pull rope assembly 57 in real time, so that the height of the seedling table 12 is adjusted. In the scheme, a link mechanism is further arranged on the seedling platform support 121, the traction end of the pull rope assembly 57 is linked with the adjusting shaft 51 through the link mechanism, and when the height of the central floating plate 54 is adjusted through the handle 52, the adjusting shaft 51 rotates to drive the traction end of the pull rope assembly 57 to be synchronously adjusted through the link mechanism, so that the function of automatically adjusting the height of the profile modeling structure according to the height of the ground is avoided, and the interpolation depth is more convenient to adjust. In the particular embodiment as shown in the figures, the linkage mechanism includes a second link 561, a third link 562, a fourth link 563, and a movable plate 564. The movable plate 564 is hinged to the seedling table support 121, the fourth link 563 is connected to the movable plate 564 and synchronously rotates along a hinged end D of the movable plate 564, the traction end B of the rope pulling assembly 57 is movably disposed on the upper end of the fourth link 563, the lower end of the second link 561 is connected to the adjusting shaft 51, and two end portions of the third link 562 are respectively movably connected to the upper end of the second link 561 and the lower end of the fourth link 563. A connecting line between the hinged end D of the movable plate 564 and the traction end B of the pull rope assembly 57 is parallel to and equal to the first link 55, the length of the second link 561 is equal to the distance between the hinged end D of the movable plate 564 and the lower end connection point C of the fourth link 563, and when the hinged end D of the movable plate 564 and the lower end connection point C of the fourth link 563 are in the same vertical direction, the third link 562 is horizontally disposed. The technical scheme specifically discloses an embodiment of a link mechanism, in the embodiment, the link mechanism comprises a second link 561, a third link 562, a fourth link 563 and a movable plate 564, and the conditions defined in the above-mentioned scheme are met, so that a parallel linkage structure is formed between the connection between the adjusting shaft 51 and the central floating plate 54 and the traction end of the pull rope assembly 57, the adjusting shaft 51 drives the central floating plate 54 to move, and the movement is consistent with the movement of the traction end of the pull rope assembly 57 relative to the hinged end D of the movable plate 564, so as to achieve dynamic balance, and the function of automatically adjusting the height of the profiling structure according to the height of the terrain cannot be influenced by adjusting the interpolation depth.

In the above scheme, the upper end of the fourth link 563 is connected to a traction plate 58, the traction plate 58 is connected to the fourth link 563 in a sliding and limiting manner by using the traction end B of the pull rope assembly 57 as a reference point, and the other end of the traction plate 58 is connected to the pull rope assembly 57. And a pull rod 59 is arranged on the central floating plate 54 and connected with the traction plate 58. The plate body of the pulling plate 58 is provided with a sliding slot 581, and the pulling end B of the pulling rope component 57 extends into the sliding slot 581 and can slide relative to the sliding slot 581. In the above technical solution, when the central floating plate 54 swings along the middle hinge point thereof, the pulling plate 58 is pulled, so that the pulling plate 58 slides relative to the fourth link 563, and the pulling rope assembly 57 is pulled.

The gate valve operating device 4 connected to the central floating plate 54 assembly of the above-mentioned insertion depth adjusting device is specifically shown in fig. 3-6, and the gate valve operating device 4 includes a first rotating arm 41 whose middle part is connected to the rotary valve core 32 of the gate valve 3 and rotates circumferentially and synchronously, and a second rotating arm 42 and a driving assembly capable of driving the first rotating arm 41 to rotate in a limited range in a single direction. In the above-described aspect, the feature of "limited range" is defined, and specifically, the gate valve operating device 4 includes the limiting plate 43, and at least a part of the limiting plate 43 constitutes the limiting protrusion 43a and is disposed on the rotation path of the pin shaft to limit the first rotating arm 41 from rotating within the limited range.

The first end of the second rotating arm 42 is pivotally connected to the first end of the first rotating arm 41, the pivotally connected end is connected to a tension spring 44, and the second end of the second rotating arm 42 is connected to the central floating plate 54 assembly through a pull rope assembly 57. The gate valve operating device 4 comprises a first rotating arm 41, a second rotating arm 42 and a driving assembly, wherein the middle part of the first rotating arm 41 is connected with a rotary valve core 32 of the gate valve 3 and synchronously drives the rotary valve core 32 to rotate, so that the output quantity of the oil cylinder 2 is controlled, and the height of the seedling table 12 is finally controlled. In this embodiment, the driving assembly adopts a manual or electric driving end driven by an external force, and can drive the first rotating arm 41 to rotate in a limited range in a single direction. The drive assembly is used to raise the height of the seedling table 12 when the transplanter is not in operation. The second end of the second rotating arm 42 is connected with a central floating plate 54 assembly through a pull rope assembly 57, when the seedling machine works, the central floating plate 54 assembly feeds back according to the ground condition in real time, pulls the second rotating arm 42, meanwhile, the tension spring 44 pulls the first rotating arm 41 and the second rotating arm 42, the first rotating arm 41 is maintained at the initial position, and the output quantity of the oil cylinder 2 is adjusted through the gate valve 3 under the action of the second rotating arm 42 and the tension spring 44, so that the height of the seedling table 12 is finally adjusted. This scheme combines together drive gate valve 3 mode and drive assembly drive gate valve 3 mode among the profile modeling regulatory function, adopts same set of gate valve operating means 4 to realize when the transplanter is worked and when not working to the control of hydro-cylinder 2 output, has the advantage of simplifying the structure, reduce cost, the reduction operation degree of difficulty.

In one embodiment, a pin 45 is disposed on the first rotating arm 41 from the rotary valve element 32 to the second end, and the second rotating arm 42 can act on the pin 45 in one direction to rotate the first rotating arm 41 in one direction. The technical scheme defines that the pin 45 of the first rotating arm 41 acted by the second rotating arm 42 is positioned between the rotary valve core 32 and the second end part, namely, the pin is positioned at two sides of the rotary valve core 32 relative to the pivot joint of the second rotating arm 42 and the first end part, and the pin is driven in a lever mode. In a specific embodiment, the pin 45 is disposed on the second end of the first rotating arm 41, and the second rotating arm 42 is provided with a groove 421 adapted to the pin 45. The bottom of the groove 421 on the second rotating arm 42 can abut against the pin and apply force to the first rotating arm 41. In this technical scheme, set up recess 421 and correspond with round pin axle 45 on the second swinging boom 42, realize one-way drive through recess 421 and round pin axle 45 mode.

The drive assembly in the above arrangement includes a drive block 46 and a drive member connected to the drive block 46 and acting on the drive block 46 to move it. The driving block 46 can act on the first rotating arm 41 in one direction to make it rotate in one direction. As described above, the pin 45 is provided on the first rotating arm 41 from the rotary valve body 32 to the second end, and in the present embodiment, the pin 45 is provided on the second end of the first rotating arm 41. The driving block 46 is sleeved outside the rotary valve element 32 and can rotate coaxially with the rotary valve element 32, and the driving end of the driving block 46 can act on the pin 45 in a unidirectional manner to enable the first rotating arm 41 to rotate in a unidirectional manner. In the above technical solution, the driving block 46 is sleeved outside the rotary valve element 32 and can rotate coaxially with respect to the rotary valve element 32, the driving component acts on the driving block 46 to rotate the driving block, and acts on the pin 45 in one direction to rotate the first rotating arm 41 in one direction during the rotation process. In this embodiment, the driving unit may adopt two schemes of electric control or manual control, or a scheme combining electric control and manual control, for example, the outer edge of the driving block 46 is provided with a toothed edge 461 on the same circumferential line, and the driving unit includes a driving tooth 471 meshed with the toothed edge 461 and driven by the driving tooth 471, and a driving motor 472 for driving the driving tooth 471 to rotate. In the technical scheme, the driving part adopts a driving motor 472 to realize electric control. Or the drive member further includes a drive handle 473 disposed on the drive block 46. In the technical scheme, the driving part adopts a driving handle 473 to realize manual control.

On the basis of the gate valve operating device 4, the planting clutch and the seedling platform 12 are further integrated in the embodiment. The specific implementation scheme is as follows: the driving block 46 is connected with an interpolation clutch driving rod of the rice transplanter through a linkage mechanism, the driving block 46 in the scheme is connected with the interpolation clutch driving rod of the rice transplanter through the linkage mechanism, when the driving block 46 drives the first rotating arm 41 to rotate, the engagement or disengagement of the interpolation clutch is controlled through the linkage mechanism, so that the insertion clutch and the seedling table 12 are integrated in a lifting mode, the operation mechanism is simplified, and the use is convenient.

The linkage mechanism comprises a swing rod 48 and a connecting rod assembly, wherein the middle part of the swing rod 48 is hinged to the rack 11, the connecting rod assembly is connected with the first end part of the swing rod 48, and the tail end of the connecting rod assembly is connected with an interpolation clutch driving rod 401. The second end of the swing link 48 is engaged with the driving block 46 by a cam structure. The linkage assembly includes a traction member 491 coupled to a first end of the swing link 48, and a linkage 492 coupled at a head end to the traction member 491 and at a tail end to the interpolative clutch drive rod 401. The driving block 46 is provided with a cam groove 462, and the second end of the swing link 48 is movably arranged in the cam groove 462 of the driving block 46. And the second end of the rocker 48 moves relative to the cam slot 462 as the drive block 46 rotates. The specific embodiment of the cam structure is that the driving block 46 is provided with a cam groove 462, and the second end of the swing link 48 is attached to the cam groove 462, so as to realize the cam driving structure. The second end of the swing lever 48 is provided with a roller 481 so as to be rollably disposed in the cam groove 462 of the driving block 46. Both ends of the cam groove 462 are provided with recesses 463 for fitting and positioning the roller 481. The recesses 463 at both ends of the cam groove 462 enable positioning of the roller 481 so as to maintain a stable state at both ends. The technical scheme specifically provides an implementable scheme of a linkage mechanism, wherein the middle part of a swing rod 48 is hinged on the rack 11, a driving block 46 adopts a cam structure to drive the swing rod 48 to swing along the hinged end of the swing rod, and the first end part of the swing rod 48 drives an interpolation clutch driving rod 401 through a connecting rod 492 component to control the engagement or disengagement of the interpolation clutch 40.

The gate valve 3 driven by the gate valve operating device 4 can be specifically shown in fig. 7 to 11, and includes a valve body 31, and a rotary valve element 32, a stop valve element 33 and an overflow valve element 34 arranged inside the valve body 31.

The valve body 31 is internally provided with a rotary valve cavity and a stop valve cavity, and the valve body 31 is provided with an oil port P, an oil port A, an oil port T1 and an oil port T2 which are communicated with the rotary valve cavity. The oil path between the oil port P and the oil port A passes through the rotary valve cavity and the stop valve cavity, and the stop valve core 33 is arranged in the stop valve cavity and is positioned in the oil path between the rotary valve cavity and the oil port A to control the on-off of the oil path. The rotary valve core 32 is arranged in the rotary valve cavity and used for synchronously controlling the oil passages of the oil port T1 and the oil port T2 and the oil port P. The oil port T1 and the oil port T2 are communicated with each other all the time through the rotary valve cavity. In the scheme, an oil port P is an oil inlet connected with a hydraulic source (an oil tank), and a channel between the oil port P and a rotary valve cavity is an oil inlet channel; the oil port T1 is connected with the next hydraulic device (HST) as an oil outlet, the oil port A and the oil port T2 are respectively connected with the small chamber of the oil cylinder 2 and the large chamber of the oil cylinder 2 as oil inlet and outlet, and the channels between the oil port T1, the oil port T2 and the rotary valve cavity are oil outlet channels. In the above scheme, the rotary valve core 32 is disposed in the rotary valve cavity and is used for synchronously controlling the on-off of the oil passages of the oil port T1 and the oil port T2 and the oil port P respectively. And the stop valve core 33 is arranged in the stop valve cavity and is positioned in the oil path between the rotary valve cavity and the oil port A to control the on-off of the oil path. Therefore, in the above scheme, the rotary valve core 32 and the stop valve core 33 are arranged in the same valve body 31, so that the on-off of a plurality of oil paths is controlled, including the control of the output quantity of the oil cylinder 2 and the control of the next path of hydraulic device. Thus, a highly integrated gate valve 3 is provided, which simplifies the structure and reduces the cost.

In a specific embodiment, a first chamber 313 is formed between the inner wall of the rotary valve cavity and the rotary valve core 32, and the oil port P and the oil port a are communicated with the first chamber 313 of the rotary valve cavity. Two notches 321 are formed in the side wall of the valve core of the rotary valve core 32, the two notches 321 are communicated with the first chamber 313, and a first oil path connecting port between the oil port T1 and the rotary valve cavity and the first oil path connecting port between the oil port T2 and the rotary valve cavity are located at the same axial position with the notches 321. A blocking portion 322 for blocking the first oil passage connection port between the oil port T1, the oil port T2, and the rotary valve chamber is formed between the two notches 321. The above scheme provides a specific embodiment, in which the oil port P and the oil port a are always communicated through the first chamber 313 of the rotary valve chamber, and the on-off between the oil port P and the oil port a is controlled by the cut-off valve core 33. And the oil ports T1 and T2 can communicate with the first chamber 313 of the rotary valve chamber, but are controlled by the rotation of the rotary valve body 32. When the notch 321 on the rotary valve core 32 is opposite to the first oil path connection ports between the oil port T1 and the oil port T2 and the rotary valve cavity, the oil port T1 and the oil port T2 are respectively opened with the oil path of the oil port P. When the blocking portion 322 of the rotary valve body 32 faces the first oil path connection ports between the oil port T1 and the oil port T2 and the rotary valve cavity, the oil port T1 and the oil port T2 are respectively closed with the oil path of the oil port P. A second chamber 314 is formed between the inner wall of the rotary valve cavity and the rotary valve core 32, and the second chamber 314 is not communicated with the first chamber 313. The oil port T1 and the oil port T2 are communicated with the second chamber 314 of the rotary valve chamber through oil passages. In the above solution, the oil port T1 and the oil port T2 are always communicated with each other through the second chamber 314 of the rotary valve chamber, as described above, the oil port T1 is connected to the next hydraulic device HST as an oil outlet, and the oil port a and the oil port T2 are respectively connected to the small chamber of the oil cylinder 2 and the large chamber of the oil cylinder 2. The problem to be solved by the above solution is that when the gate valve 3 feeds oil to the oil port a, the oil storage capacity of the small chamber of the oil cylinder 2 becomes large, and the piston moves to press out the hydraulic oil in the large chamber of the oil cylinder 2, and the hydraulic oil flows into the second chamber 314 from the oil port T2 and then is discharged from the oil port T1.

Further, a plurality of equal pressure grooves 323 are provided along the circumferential direction of the spool side wall of the rotary spool 32. The isobaric groove 323 is provided to ensure uniform pressure applied to the circumferential direction of the rotary valve body 32. One end of the rotary valve element 32 extends out of the valve body 31, and the other end of the rotary valve element 32 is positioned inside the valve body 31. A plug screw 35 for closing one side opening of the rotary valve cavity is arranged in the valve body 31, and the plug screw 35 is abutted against the inner end part of the rotary valve core 32. An oil discharge cavity 324 is arranged in the rotary valve core 32 along the axial direction, and the oil discharge cavity 324 is communicated with the second cavity 314 through a through hole on the side wall of the rotary valve core 32. An oil discharge groove 325 communicated with the oil discharge cavity 324 is arranged on the inner end part of the rotary valve core 32. In the above technical solution, since the rotary valve element 32 is rotatably disposed in the rotary valve cavity, the sealing between the rotary valve element 32 and the inner wall of the rotary valve cavity cannot be completely ensured, and there is hydraulic oil penetration. However, if the hydraulic oil continues to accumulate, the pressure in the rotary valve chamber increases. In this embodiment, an oil discharge chamber 324 is provided in the rotary valve member 32 along the axial direction thereof, and an oil discharge groove 325 communicating with the oil discharge chamber 324 is provided in the inner end portion of the rotary valve member 32. When the permeated hydraulic oil flows to the inner end portion of the spool 32, it flows into the oil relief chamber 324 from the oil relief groove 325, and finally returns to the second chamber 314 of the spool chamber, and finally is discharged from the oil port T1 through the oil outlet passage. By adopting the scheme, the problem of pressure increase in the cavity caused by oil leakage in the control of the rotary valve can be solved, and the leaked hydraulic oil is reintroduced into a hydraulic system, so that the normal work of the rotary valve can be ensured.

The shutoff valve body 33 is connected to the valve body 31 and is axially adjustable relative to the valve body 31. A third chamber 315 is formed between the stop valve cavity and the stop valve core 33, and the oil port a is communicated with the third chamber 315 of the stop valve cavity. The inner end part of the stop valve core 33 is provided with a conical sealing end 331, and the conical sealing end 331 is used for sealing an oil passage between the third chamber 315 and the rotary valve cavity. In the above technical solution, the shut-off valve core 33 may be specifically connected to the valve body 31 by using a thread, so that when the shut-off valve core 33 rotates, the shut-off valve core 33 axially moves relative to the valve body 31, and the tapered sealing end 331 at the inner end of the shut-off valve core 33 controls the on-off of the oil passage between the third chamber 315 and the rotary valve cavity, and further controls the on-off of the oil port a and the oil port P. The third chamber 315 in the above embodiment can refer to the first chamber 313 and the second chamber 314.

An overflow valve cavity is further arranged in the valve body 31 and is respectively connected with the oil port P and the oil port T1. An overflow valve core 34 is arranged in the overflow valve cavity, and the overflow valve core 34 is used for controlling the on-off of an oil path between the oil port P and the oil port T1. The spill valve member 34 is connected to the valve body 31 and is axially adjustable relative to the valve body 31. A fourth chamber 317 communicated with the oil port P and a fifth chamber 318 communicated with the oil port T1 are formed between the relief valve cavity and the relief valve core 34, and the relief valve core 34 controls the connection and disconnection between the fourth chamber 317 and the fifth chamber 318. In the above scheme, a relief valve cavity is further arranged in the valve body 31, and a relief valve is arranged in the relief valve cavity. When the hydraulic pressure inside the valve body 31 is large, the relief valve may be controlled to release the pressure, and the released hydraulic oil flows through the fourth chamber 317 and the fifth chamber 318 in sequence from the oil port P, and is finally discharged through the oil port T1.

The first chamber 313, the second chamber 314, the third chamber 315, the fourth chamber 317, and the fifth chamber 318 in the above solution may be grooves provided on the side wall of the valve core along the circumferential direction thereof, so as to form the first chamber 313 and the second chamber 314 with the inner wall of the valve cavity. Alternatively, the inner wall of the valve chamber may be formed as a recess projecting outwardly compared to the side wall of the valve spool to form the first chamber 313, the second chamber 314, the third chamber 315, the fourth chamber 317, and the fifth chamber 318.

Based on the concrete structure of the rice transplanter, the embodiment further provides a hydraulic system on the rice transplanter, as shown in fig. 12, the hydraulic system comprises a fuel tank 6, a gate valve 3, a cylinder 2 and an HST 7. The oil tank 6, the gate valve 3 and the HST7 are sequentially connected to form a first hydraulic circuit, an oil pump used for providing power for hydraulic oil flowing is arranged on the first hydraulic circuit, and the large cavity and the small cavity of the oil cylinder 2 are respectively connected with the gate valve 3. According to the scheme, the gate valve 3 is provided with an oil port P, an oil port A, an oil port T1 and an oil port T2, the oil port P is connected with the oil outlet end of the oil tank 6 through a pipeline, the oil inlet of the HST7 is connected with the oil port T1 through a pipeline, the small chamber of the oil cylinder 2 is connected with the oil port A through a pipeline, and the large chamber of the oil cylinder 2 is connected with the oil port T2 through a pipeline. The gate valve 3 controls the on-off of an oil path between the oil port P and the oil port A, the oil port T1 and the oil port T2 are respectively connected with the oil path of the oil port P, and the oil port T1 and the oil port T2 are communicated all the time. In the above scheme, the oil port P is connected to the hydraulic source of the oil tank 6 and serves as an oil inlet of the gate valve 3, the oil port T1 is connected to the next hydraulic device of the HST7 and serves as an oil outlet of the gate valve 3, and the oil port a and the oil port T2 are respectively connected to the small chamber of the oil cylinder 2 and the large chamber of the oil cylinder 2 and serve as oil inlets and outlets of the gate valve 3. In the scheme, the HST7 is connected with the oil port T1, and the oil port T1 is communicated with the oil port T2 all the time. The output volume of the oil cylinder 2 is controlled by the gate valve 3 in the scheme, when the gate valve 3 controls hydraulic oil to be output to the oil port T1 and the oil port T2, on one hand, the oil storage volume of a large chamber of the oil cylinder 2 is increased, the output volume of the oil cylinder 2 is increased, the seedling table 12 descends, on the other hand, part of the hydraulic oil enters the HST7 from the oil port T1, and hydraulic oil is supplemented to the HST 7. When the gate valve 3 controls hydraulic oil to be output to the oil port A, the oil storage capacity of the small cavity of the oil cylinder 2 is increased, the output capacity of the oil cylinder 2 is reduced, and the seedling table 12 is lifted. Meanwhile, the small chamber of the oil cylinder 2 presses the hydraulic oil in the large chamber of the oil cylinder 2 back to the gate valve 3 through the oil port T2, and further, the hydraulic oil enters the HST7 from the oil port T1 because the oil port T1 is communicated with the oil port T2 all the time, so that the hydraulic oil is supplemented to the HST 7. Therefore, by adopting the hydraulic system, no matter the oil cylinder 2 is in the process of increasing or decreasing the output quantity, the hydraulic oil can be supplemented to the HST7, and the normal work of the HST7 is ensured.

In addition, the hydraulic system further comprises a power-assisted steering gear 8, the oil inlet end of the power-assisted steering gear 8 is connected with the oil outlet end of the oil tank 6 through a pipeline, and the oil outlet end of the power-assisted steering gear 8 is connected with the oil port P of the gate valve 3 through a pipeline. The power steering 8 can reduce an operation force of a driver acting on a steering wheel (may be referred to as a steering wheel), and a device that generates a supplementary steering power using external power is referred to as a power steering device. And a radiator is arranged on a pipeline between the oil outlet of the HST7 and the oil return hole of the oil tank 6. In the scheme, the high-temperature hydraulic oil flowing out of the HST7 is subjected to heat dissipation and temperature reduction.

The HST7 comprises a box 71, and a variable pump 72 and a motor 73 which are arranged in the box 71, wherein the variable pump 72 controls the rotating speed and the rotating direction of the motor 73 by controlling hydraulic oil. The HST7 structure in the above scheme is the existing structure, and the operating mechanism described in the chinese utility model patent document referred to as "CN 204895144U" controls the rotation of the HST7 pump shaft, the rotation speed and the rotation direction of the hydraulic motor 73.

Finally, the embodiment also provides an HST operating system applied to the rice transplanter, and the HST operating system integrates the forward and backward control and the interpolation clutch control of the HST7 in the same handle mechanism, thereby simplifying the structure and facilitating the use. Specifically, as shown in fig. 13, an HST operating system includes a handle mechanism, and a sensor 91 for connecting to a drive motor 472 in the gate valve operating device 4, and a transmission lever 92 for connecting to an HST 7. The handle mechanism includes a handle operation plate 94 positioned on the frame 11 by a first rotation shaft 93, and a handle operation lever 95 positioned on the handle operation plate 94 by a second rotation shaft 96. The first end of the drive link 92 is connected to the handle operating plate 94 and the second end of the drive link 92 is connected to the drive end of the variable displacement pump 72 of the HST 7. As described above in the hydraulic system, in conjunction with fig. 12, the displacement of the variable displacement pump 72 in HST7 is controlled to control the output speed and steering of the hydraulic motor 73. The sensor 91 is fixed on a handle operating plate 94, and the first rotating shaft 93 is perpendicular to the second rotating shaft 96. The handle operating lever 95 drives the handle operating plate 94 to rotate along the first rotating shaft 93, and controls the HST 7. The handle lever 95 rotates along the second rotation axis 96 and can trigger the sensor 91 to control the gate valve operating device 4. In this embodiment, the HST operating system includes a handle mechanism, a sensor 91, and a transmission rod 92, wherein the sensor 91 is connected to a drive motor 472 in the gate valve operating device 4, and the transmission rod 92 is connected to the HST 7. And the handle mechanism includes a handle operation plate 94 positioned on the frame 11 by a first rotation shaft 93, and a handle operation lever 95 positioned on the handle operation plate 94 by a second rotation shaft 96. With the above HST operating system, the operator can manipulate the handle lever 95 to drive the handle operating plate 94 to rotate along the first rotation shaft 93, and then control the HST7 through the transmission rod 92, specifically control the displacement of the variable displacement pump 72 in the HST7 to control the output rotation speed and the steering of the hydraulic motor 73. On the other hand, the lever 95 is rotated along the second rotation axis 96, and the sensor 91 is triggered during the rotation of the lever 95, thereby controlling the gate valve operating device 4 and further controlling the interpolation clutch.

In a further embodiment, a return spring 97 is further connected to the lower end of the handle lever 95, and the force of the return spring 97 drives the handle lever 95 to rotate along the second rotation shaft 96 to a side where the sensor 91 is not triggered. The lower end of the handle operating lever 95 is provided with a rotating plate 98, the second rotating shaft 96 penetrates through the rotating plate 98, and the handle operating lever 95 drives the rotating plate 98 to rotate along the second rotating shaft 96. One end of the return spring 97 is connected to the rotating plate 98, and the other end is connected to the handle operating plate 94. The rotating plate 98 is provided with a trigger end 981, and the trigger end 981 is used for triggering the sensor 91 and controlling the gate valve operating device 4. In the above technical solution, the return spring 97 is further connected to the lower end portion of the handle operating lever 95, and when the handle operating lever 95 is not constrained, the handle operating lever 95 is rotated along the second rotating shaft 96 to the side that does not trigger the sensor 91 under the action of the return spring 97, so that the interpolation clutch is in a disengaged state, and interpolation is performed only when the operator rotates the handle operating lever 95 to trigger the sensor 91. Therefore, interpolation caused by misoperation in an unconscious state can be avoided, and possible risks are avoided.

The handle mechanism further comprises an HST shift board 99 disposed on the frame 11, and a shift chute 581 for limiting the position of the handle operating rod 95 is disposed on the HST shift board 99. The gear step link 581 includes a reverse gear step 991, a first forward gear step 992, and a second forward gear step 993, which are disposed in parallel with the axis of the second rotating shaft 96, and an interpolation control step 994, which is disposed in parallel with the axis of the first rotating shaft 93. The rear ends of the first forward gear section 992 and the second forward gear section 993 are respectively communicated with two end parts of the interpolation control section 994, and the front end part of the reverse gear section 991 is communicated with the middle part of the interpolation control section 994 between the first forward gear section 992 and the second forward gear section 993. In the above scheme, the position of the handle operating rod 95 is limited by the gear chute 581 on the HST gear board 99, the interpolation control section 994 in the gear chute 581 is a sliding section for the handle operating rod 95 to control interpolation, only one end of the interpolation control section 994 is an interpolation position, the sensor 91 cannot be triggered at other positions, and the rear ends of the first forward gear section 992 and the second forward gear section 993 are respectively communicated with two end parts of the interpolation control section 994, so that one of the first forward gear section 992 and the second forward gear section 993 represents the state that the interpolation part does not work when the rice transplanter moves forward. The other represents the working state of the interpolation part when the transplanter moves forwards. The reverse gear section 991 communicating with the middle of the interpolation control section 994 is also in a non-interpolation position, i.e., an interpolation process is not performed during reverse gear.

By combining the technical scheme, when the transplanter works, an operator operates the handle operating rod 95 in the HST operating system, so that the forward movement, the stop and the backward movement of the power part of the transplanter can be controlled, and the clutch of the interpolation part can also be controlled. Specifically, when the handle operating lever 95 triggers the sensor 91, the driving motor 472 in the gate valve operating device 4 operates to drive the driving block 46 to operate clockwise, the first rotating arm 41 in the gate valve operating device 4 drives the rotary valve core 32 on the gate valve 3 to reset under the action of the tension spring 44, so that the oil port T2 in the gate valve 3 is communicated with the oil port P, the output quantity of the oil cylinder 2 is increased, and the seedling table 12 finally descends; meanwhile, the drive block 46 operates to control the interpolation clutch to be in an engaged state through the linkage mechanism for interpolation. In the interpolation process, the central floating plate 54 assembly feeds back according to the ground condition in real time, pulls the second rotating arm 42, meanwhile, the tension spring 44 pulls the first rotating arm 41 and the second rotating arm 42, the output quantity of the oil cylinder 2 is adjusted through the gate valve 3 under the action of the second rotating arm 42 and the tension spring 44, and the height of the seedling table 12 is finally adjusted, namely, the height is automatically adjusted according to the ground shape, so that the output quantity of the oil cylinder 2 is controlled to adjust the height of the transplanting part (the seedling table 12), the depth and the height of each transplanting are finally ensured to be consistent, and the survival rate of seedlings is ensured. When the handle operating rod 95 does not trigger the sensor 91, the driving motor 472 in the gate valve operating device 4 operates to drive the driving block 46 to operate in the counterclockwise direction, the driving block 46 acts on the first rotating arm 41 to drive the rotary valve core 32 on the gate valve 3 to rotate, so that the oil port T2 and the oil port P in the gate valve 3 are closed, the oil port a and the oil port P reduce the output quantity of the oil cylinder 2, and finally the seedling table 12 is lifted; meanwhile, the drive block 46 controls the interpolation clutch to be in a disengaged state through the linkage mechanism during operation, and interpolation cannot be performed.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although embodiments of the present invention have been shown and described, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that changes, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the principles and spirit of the present invention.

Claims (10)

1. A gate valve operating apparatus for controlling interpolation, characterized by: the device comprises a first rotating arm (41) and a driving assembly, wherein the middle part of the first rotating arm is connected with a rotary valve core (32) of the gate valve (3) and rotates circumferentially and synchronously, and the driving assembly can drive the first rotating arm (41) to rotate in a limited range in a one-way mode; the drive assembly comprises a drive block (46) and a drive member connected to the drive block (46) and acting on the drive block (46) to move it; the driving block (46) is sleeved on the outer side of the rotary valve core (32), can rotate coaxially relative to the rotary valve core (32), and can act on the first rotating arm (41) in a one-way mode to enable the first rotating arm (41) to rotate in a one-way mode; the driving block (46) is connected with an interpolation clutch driving rod (401) of the rice transplanter through a linkage mechanism.

2. A gate valve operating apparatus to control interpolation of claim 1, wherein: the linkage mechanism comprises a swing rod (48) with the middle part hinged on the rack (11) and a connecting rod (492) component connected with the first end part of the swing rod (48), and the tail end of the connecting rod (492) component is connected with the interpolation clutch driving rod (401); the second end part of the swing rod (48) is matched with the driving block (46) in a cam structure.

3. A gate valve operating apparatus to control interpolation according to claim 2, wherein: the driving block (46) is provided with a cam groove (462), and the second end part of the swing rod (48) is movably arranged in the cam groove (462) of the driving block (46); and the second end of the swing link (48) and the cam groove (462) move relatively along with the rotation of the driving block (46).

4. A gate valve operating apparatus to control interpolation according to claim 3, wherein: a roller (481) is arranged at the second end part of the swing rod (48) and is arranged in a cam groove (462) of the driving block (46) in a rolling way; both ends of the cam groove (462) are provided with recesses (463) for fitting and positioning the roller (481).

5. A gate valve operating apparatus to control interpolation according to claim 2, wherein: the connecting rod (492) component comprises a traction piece (491) connected with the first end part of the swing rod (48), and a connecting rod (492) connected with the traction piece (491) at the head end and the interpolation clutch driving rod (401) at the tail end.

6. A gate valve operating device to control interpolation according to any one of claims 1 to 5, wherein: the outer edge of the driving block (46) is provided with a toothed edge (461) on the same circumferential line, and the driving part comprises a driving tooth (471) meshed with the toothed edge (461) for transmission and a driving motor (472) for driving the driving tooth (471) to rotate.

7. A gate valve operating device to control interpolation according to any one of claims 1 to 5, wherein: the drive member also includes a drive handle (473) disposed on the drive block (46).

8. A gate valve operating device to control interpolation according to any one of claims 1 to 5, wherein: a pin shaft (45) is arranged on the first rotating arm (41) from the rotary valve core (32) to the second end part; the driving end of the driving block (46) can act on the pin shaft (45) in a single direction to enable the first rotating arm (41) to rotate in a single direction.

9. A gate valve operating apparatus to control interpolation according to claim 8, wherein: the first rotating arm further comprises a limiting plate (43), at least one part of the limiting plate (43) forms a limiting protrusion (43a) and is arranged on a rotating path of the pin shaft (45) to limit the first rotating arm (41) to rotate within a limited range.

10. A rice transplanter, characterized in that: comprising a gate valve operating device of any one of claims 1 to 9 controlling interpolation.

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