A plant stem flexible clamping device and control method

Abstract

This invention belongs to the technical field of plant clamping devices, and discloses a flexible plant stem clamping device and control method. An air compressor is connected to the inlet of an electromagnetic pneumatic reversing valve through a pipeline. The two outlets of the electromagnetic pneumatic reversing valve are connected to the two gas inlets of a double-acting cylinder, controlling the direction of movement of the double-acting cylinder. The double-acting cylinder is connected to a cylinder stroke block, which controls the push rod to control the tightness of the clamping part. When the double-acting cylinder moves in the opposite direction, after a period of idle stroke, the cylinder stroke block pulls the pull plate away from the clamping part. The clamping part transforms the linear pushing motion from the push rod into a lateral clamping and loosening motion of the clamping part through an inclined slide groove. The clamping part can adjust the clamping position of the plant stem and the distance between multiple stems. The clamping hand is equipped with a spring, which can realize flexible clamping, automatically compensate for the clamping of the stem, and provide a certain clamping force. It can realize the clamping of multiple plants, stem cutting experiments, and many other applications. It has diverse functions and is suitable for various fields.

Description

Technical Field

[0001] The invention belongs to the technical field of plant clamping devices, and in particular relates to a flexible clamping device for plant stems. Background Art

[0002] At present, many traditional clamping devices have fixed strokes, non-adjustable clamping forces, unstable clamping, and complex clamping methods. They are not well applicable to the stems of plant crops and the like. Not only are they inconvenient to install and use, but there are also problems such as damage and inability to clamp. In view of the above problems, the present invention proposes a pneumatic plant stem flexible clamping device, which has an adjustable clamping stroke and flexible clamping force, stable clamping, can clamp multiple plants, and has a wide range of applicability. Specifically, it can be widely used in the fields of plant stem mechanical properties tests, grafting, planting, and stem cutting tests, and can perform automated operations, production, and the like.

[0003] When conducting a stem tensile test on plant stems to study the mechanical properties of the corresponding crops, if the stems are clamped too loosely, they will slide, and if they are clamped too tightly, they will be damaged or even directly broken, which cannot adapt to the clamping of fragile stems; Grafting is a method often used in vegetable and fruit planting. Traditional methods use tape to wrap directly, which not only causes instability of branches, but also is not conducive to the normal growth of grafted vegetables and fruits, which is very inconvenient; when using a clamp for fixing, during the fixing process, the clamping force cannot be controlled manually, which leads to excessive clamping of the plant body during the fixing process, damaging the grafted part; during the cutting test, it is usually necessary to clamp and fix different plant stems to achieve the purpose of simulating the vertical growth of the plant, but due to the different growth characteristics of plant stems, the spacing between plants is different, and the thickness of the stems is uneven. The existing clamping device has a complex structure and clamping method, and it is difficult to further adjust the position after clamping, and it is difficult to adjust the spacing between plants, thereby affecting the work efficiency of the entire test process.

[0004] Through the above analysis, the problems and defects of the existing technology are: the clamping force cannot be controlled manually, which leads to excessive clamping of the plant body and damage to the grafted part during the fixing process. The existing clamping device has a complex structure and clamping method, and it is difficult to further adjust the position after clamping, and it is difficult to adjust the spacing between plants, thus affecting the work efficiency of the entire test process. Summary of the invention

[0005] In view of the problems existing in the prior art, the present invention provides a flexible clamping device for plant stems.

[0006] The present invention is implemented in this way. A flexible clamping device for plant stems is provided with: a workbench, anchor bolts, an air compressor, a support frame, an electromagnetic pneumatic reversing valve, a reverse stroke air pipe, a forward stroke air pipe, a cylinder placement platform, a dust cover, a vertical slide bar, a horizontal slide bar, a clamping hand, a synchronous step cylinder, a separation plate, and connecting bolts, wherein: the air compressor is fixed to the bottom of the workbench table by anchor bolts; the electromagnetic pneumatic reversing valve is placed on the support frame; the electromagnetic pneumatic reversing valve is connected to the air compressor by an air pipe; the reverse One end of the forward stroke air pipe and the positive stroke air pipe is connected to the two gas outlets of the electromagnetic pneumatic reversing valve, and the other end is connected to the cylinder air inlet under the cylinder placement platform; the cylinder placement platform is connected to the workbench desktop through connecting bolts; the dust cover is placed in the concave surface of the cylinder placement platform; the clamping hand is fixed to the vertical slide bar through a horizontal slide bar; the synchronous step cylinder enables the upper and lower clamping hands to keep moving synchronously in the clamping part to adjust the spacing between plant stems; the isolation plate prevents the cutting flow and abrasive particles from impacting the clamping part.

[0007] Furthermore, the air delivery part of the air compressor includes a power switch, a pressure gauge, an airway switch, and an output air pipe; the air delivery part of the air compressor is connected to the input channel of the electromagnetic pneumatic reversing valve; the reverse output channel and the forward output channel of the electromagnetic pneumatic reversing valve are respectively connected to the reverse stroke air pipe and the forward stroke air pipe.

[0008] Furthermore, the double-acting cylinder is connected to the cylinder stroke block box by bolts; the cylinder stroke block box is filled with an idle stroke adjusting screw, a push plate, a pull plate and a push rod, wherein the idle stroke adjusting screw and the push plate are fixedly connected by threads, and the push rod and the pull plate are interference connected; when the double-acting cylinder moves forward, the idle stroke adjusting screw, the push plate and the cylinder stroke block box are pushed to move toward the clamping part, and the idle stroke adjusting screw can adjust the idle stroke to achieve the purpose of controlling the clamping diameter. After a period of idle stroke, the pull plate and the push rod are pushed to clamp the clamping part; when the double-acting cylinder moves in the reverse direction, after a period of idle stroke, the cylinder stroke block box pulls the pull plate away from the clamping part to release the clamping part.

[0009] Furthermore, the clamping part is connected to the push rod through a notch plate, and the notch plate is connected to the long handle through screws on the connecting plate. The clamping part converts the linear propulsion movement from the push rod into a lateral clamping and loosening movement of the holding part through an inclined groove.

[0010] Furthermore, the clamping part includes a vertical slide bar, a transverse slide bar, a clamping hand, a synchronous step cylinder, a threaded adjustment rod, a spacing adjustment nut, a fastening screw, and a slide groove protective cover; the transverse slide bar is connected to the long handle by a fastening bolt to transmit the lateral movement from the connecting plate; the vertical slide bar and the transverse slide bar are interference fit; the clamping hand and the synchronous step cylinder are installed on the transverse slide bar; the upper part of the transverse slide bar is fixed to the vertical slide bar by a fastening screw, and the fastening screw can adjust the distance between the upper and lower transverse slide bars; the threaded adjustment rod is connected to the clamping hand, and the spacing adjustment nut can adjust the spacing between the clamping hands.

[0011] Furthermore, the clamping hand includes a long handle, a short handle, an inner spring sleeve, an outer spring sleeve, a clamping block, a rubber pad, an inner spring seat, a spring, an outer spring seat, and an inner hexagonal bolt, wherein: the long handle and the short handle are placed on the transverse sliding rod, the inner spring sleeve is fixed to the long handle or the short handle by an inner hexagonal bolt, the outer spring sleeve is sleeved outside the inner spring sleeve, the outer spring sleeve is connected to the clamping block by an inner hexagonal bolt, and the clamping block is bonded to the rubber pad; the inner spring seat, the spring, and the outer spring seat are placed in the inner spring sleeve and the outer spring sleeve, wherein the inner spring seat is connected to the long handle and the short handle by a thread, and the outer spring seat is connected to the clamping block by a thread; the clamping hand has two pairs of upper and lower pairs, which clamp the plant stems together and clamp stably; the device has multiple pairs of clamping hands, which can realize the clamping of multiple plants; the built-in spring of the clamping hand can shrink when subjected to force, so as to realize flexible clamping of the plant stems and automatically compensate for the diameter of the clamped stems.

[0012] Furthermore, the synchronous step cylinder includes a pin, a primary cylinder, a secondary cylinder, a tertiary cylinder, and a quaternary cylinder. The primary cylinder is fixed to the lower transverse slide bar by a pin, and the quaternary cylinder is fixed to the upper transverse slide bar by a pin. The primary cylinder, the secondary cylinder, the tertiary cylinder, and the quaternary cylinder are restricted and moved by internal slideways and cylinder protrusions to adapt to the distance between the clamping hands. The synchronous step cylinder connects the upper and lower clamping hands so that they move synchronously on the transverse slide bar to adjust the distance between the plant stems.

[0013] Furthermore, the isolation plate and the clamping part are connected to the lower transverse sliding rod through a near-cylinder screw and a far-cylinder screw.

[0014] Another object of the present invention is to provide a control method for the pneumatic plant stem flexible clamping device, the control method comprising: using pneumatic means as the power of the clamping device, after the air compressor is powered on, turning on the power switch, and turning on the airway switch after the air pressure is appropriate, so that the gas enters the electromagnetic pneumatic reversing valve; adjusting the electromagnetic pneumatic reversing valve to determine the stroke direction of the double-acting cylinder, when the double-acting cylinder moves forward, the idle stroke adjusting screw, the push plate and the cylinder stroke block box are pushed toward the clamping part, the idle stroke adjusting screw can adjust the idle stroke to achieve the purpose of controlling the clamping diameter, after a period of idle stroke, the pull plate and the push rod are pushed, and the clamping part is clamped; when the double-acting cylinder moves in the reverse direction, after a period of idle stroke, the cylinder stroke block box pulls the pull plate away from the clamping part to move, and the clamping part is released, and the clamping part converts the linear propulsion motion from the push rod into a lateral clamping and loosening motion of the clamping part through the inclined slide groove;

[0015] The fastening screw can adjust the distance between the upper and lower horizontal slide bars; the threaded adjustment rod is connected to the clamping hand, and the spacing adjustment nut can adjust the spacing between the clamping hands. The clamping hands have two pairs of upper and lower hands, which clamp the plant stems together and clamp stably; the device has multiple pairs of clamping hands, which can clamp multiple plants; the built-in spring of the clamping hand contracts when it is stressed, so as to achieve flexible clamping of the plant stems and automatically compensate for the diameter of the clamped stems;

[0016] The synchronous step cylinder includes a pin, a primary cylinder, a secondary cylinder, a tertiary cylinder and a quaternary cylinder. Each part is restricted and moved by an internal slideway and a cylinder protrusion to adapt to the distance between the clamping hands. The synchronous step cylinder connects the upper and lower clamping hands to make them move synchronously on the horizontal slide bar to adjust the distance between the plant stems.

[0017] In combination with the above technical solutions and the technical problems solved, please analyze the advantages and positive effects of the technical solutions to be protected by the present invention from the following aspects:

[0018] First, in view of the technical problems existing in the above-mentioned prior art and the difficulty of solving the problems, the technical solutions to be protected by the present invention and the results and data during the research and development process are closely combined to analyze in detail and deeply how the technical solutions of the present invention solve the technical problems, and some creative technical effects brought about after solving the problems. The specific description is as follows:

[0019] A flexible clamping device for plant stems provided by an embodiment of the present invention can clamp multiple plants by providing a pneumatic flexible clamping device for plant stems with multiple pairs of clamping hands. The clamping hands have two pairs of upper and lower pairs, which clamp the plant stems together and are stable. The built-in springs of the clamping hands can contract when stressed, so as to achieve flexible clamping of plant stems and automatically compensate for the diameter of the clamped stems, which is suitable for clamping plant stems. The present invention is not only applicable to the above-mentioned plant stem mechanical property tests, grafting, planting, and stem cutting tests, but also applicable to other similar scenarios where plant stem clamping is required.

[0020] Second, considering the technical solution as a whole or from the perspective of the product, the technical effects and advantages of the technical solution to be protected by the present invention are described in detail as follows:

[0021] The pneumatic plant stem flexible clamping device of the present invention has multiple pairs of clamping hands, which can achieve clamping of multiple plants. The clamping hands have two pairs, upper and lower, which clamp the plant stems together and provide stable clamping. The clamping hands have built-in springs that can contract when subjected to force to achieve flexible clamping of the plant stems and automatically compensate for the diameter of the clamped stems, making the device suitable for clamping plant stems.

[0022] Third, as auxiliary evidence of the inventiveness of the claims of the present invention, it is also reflected in the following important aspects:

[0023] The technical solution of the present invention solves the problems that many traditional clamping devices have fixed strokes, non-adjustable clamping forces, unstable clamping, complex clamping methods, are not well applicable to the stems of plant crops, etc., are inconvenient to install and use, are prone to damage, and cannot be clamped. In response to the above problems, the present invention proposes a pneumatic plant stem flexible clamping device, which has an adjustable clamping stroke and clamping force, stable clamping, can clamp multiple plants, and has a wide applicability. Specifically, it can be widely used in the fields of plant stem mechanical properties tests, grafting, planting, and stem cutting tests, and can perform automated operations, production, and the like. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic structural diagram of a flexible clamping device for plant stems provided by an embodiment of the present invention;

[0025] Figure 2 It is a schematic diagram of the structure of the dust cover and some parts provided by an embodiment of the present invention;

[0026] Figure 3 It is a schematic structural diagram of the rear clamping part of the inner and outer spring sleeves provided by an embodiment of the present invention;

[0027] Figure 4 is a schematic cross-sectional view of a synchronous stepped cylinder structure provided by an embodiment of the present invention;

[0028] Figure 5 is a simplified motion diagram of the clamping mechanism provided by an embodiment of the present invention;

[0029] Figure 6 is a schematic diagram of a flexible clamping device for plant stems provided by an embodiment of the present invention;

[0030] In the figure: 1. workbench; 2. anchor bolts; 3. air compressor; 4. support frame; 5. electromagnetic pneumatic reversing valve; 6. reverse stroke air pipe; 7. forward stroke air pipe; 8. cylinder placement platform; 9. dust cover; 10. vertical slide bar; 11. horizontal slide bar; 12. clamping hand; 13. synchronous stepped cylinder; 131. pin; 132. primary cylinder; 133. secondary cylinder; 134. tertiary cylinder; 135. quaternary cylinder; 14. isolation plate; 15. connecting bolt; 16. power switch; 17. barometer; 18. airway switch; 19. output air pipe; 20. input channel; 21. reverse output channel; 22. forward output channel; 23. Double-acting cylinder; 24, cylinder stroke block box; 25, idle stroke adjustment screw; 26, push plate; 27, pull plate; 28, push rod; 29, connecting plate; 30, clamping part; 31, notch plate; 32, long handle; 33, near-cylinder screw; 34, screw; 35, threaded adjustment rod; 36, spacing adjustment nut; 37, lower horizontal slide bar; 38, far-cylinder screw; 39, clamping block; 40, outer spring sleeve; 41, inner spring sleeve; 42, short handle; 43, hexagon socket bolt; 44, long handle; 45, inner spring seat; 46, spring; 47, outer spring seat; 48, rubber pad; 49, fastening screw; 50, slide groove protection cover; 51, fastening bolt. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0032] 1. Explanatory Examples In order to enable those skilled in the art to fully understand how to implement the present invention, this section provides an illustrative example that expands and describes the technical solution of the claims.

[0033] like Figure 1-Figure 6As shown, a flexible clamping device for plant stems provided by an embodiment of the present invention comprises: a workbench 1, anchor bolts 2, an air compressor 3, a support frame 4, an electromagnetic pneumatic reversing valve 5, a reverse stroke air pipe 6, a forward stroke air pipe 7, a cylinder placement platform 8, a dust cover 9, a vertical slide bar 10, a horizontal slide bar 11, a clamping hand 12, a synchronous stepped cylinder 13, an isolation plate 14, and a connecting bolt 15, wherein: the air compressor 3 is fixed to the bottom of the table of the workbench 1 by the anchor bolts 2; the electromagnetic pneumatic reversing valve 5 is placed on the support frame 4; the electromagnetic pneumatic reversing valve 5 is connected to the air compressor 3 by the air pipe connected; one end of the reverse stroke air pipe 6 and the forward stroke air pipe 7 are connected to the two gas outlets of the electromagnetic pneumatic reversing valve 5, and the other end is connected to the cylinder air inlet under the cylinder placement platform 8; the cylinder placement platform 8 is connected to the table top of the workbench 1 through the connecting bolts 15; the dust cover 9 is placed in the concave surface of the cylinder placement platform 8; the clamping hand 12 is fixed on the vertical slide bar 10 through the horizontal slide bar 11; the synchronous step cylinder 13 in the clamping part enables the upper and lower clamping hands 12 to keep moving synchronously to adjust the spacing between plant stems; the isolation plate 14 prevents the cutting flow and abrasive particles from impacting the clamping part.

[0034] The air delivery part of the air compressor 3 includes a power switch 16, a pressure gauge 17, an airway switch 18, and an output air pipe 19; the air delivery part of the air compressor 3 is connected to the input channel 20 of the electromagnetic pneumatic reversing valve 5; the reverse output channel 21 and the forward output channel 22 of the electromagnetic pneumatic reversing valve 5 are respectively connected to the reverse stroke air pipe 6 and the forward stroke air pipe 7.

[0035] The double-acting cylinder 23 is connected to the cylinder stroke block box 24 by bolts; the cylinder stroke block box 24 contains an idle stroke adjusting screw 25, a push plate 26, a pull plate 27, and a push rod 28, wherein the idle stroke adjusting screw 25 is fixedly connected to the push plate 26 by threads, and the push rod 28 is interference-connected to the pull plate 27; when the double-acting cylinder 23 moves forward, it pushes the idle stroke adjusting screw 25, the push plate 26, and the cylinder stroke block box 24 to move toward the clamping part 30, and the idle stroke adjusting screw 25 can adjust the idle stroke to achieve the purpose of controlling the clamping diameter. After a period of idle stroke, the pull plate 27 and the push rod 28 are pushed, and the clamping part 30 is clamped; when the double-acting cylinder 23 moves in the reverse direction, after a period of idle stroke, the cylinder stroke block box 24 pulls the pull plate 27 to move away from the clamping part 30, and the clamping part 30 is released.

[0036] The clamping part 30 is connected to the push rod 28 through a notch plate 31, and the notch plate 31 is connected to the long handle 32 through a screw 34 on the connecting plate 29. The clamping part 30 converts the linear propulsion movement from the push rod 28 into a lateral clamping and loosening movement of the holding part 30 through an inclined groove.

[0037] The clamping part 30 includes a vertical slide bar 10, a transverse slide bar 11, a clamping hand 12, a synchronous step cylinder 13, a threaded adjustment rod 35, a spacing adjustment nut 36, a fastening screw 49, and a slide groove protection cover 50; the transverse slide bar 11 is connected to the long handle 32 by a fastening bolt 51, transmitting the lateral movement from the connecting plate 29; the vertical slide bar 10 and the transverse slide bar 11 are interference fit; the clamping hand 12 and the synchronous step cylinder 13 are installed on the transverse slide bar 11; the upper part of the transverse slide bar 11 is fixed to the vertical slide bar 10 by a fastening screw 49, and the fastening screw 49 can adjust the distance between the upper and lower transverse slide bars 11; the threaded adjustment rod 35 is connected to the clamping hand 12, and the spacing adjustment nut 36 can adjust the spacing between the clamping hands 12.

[0038] The clamping hand 12 includes a long handle 44, a short handle 42, an inner spring sleeve 41, an outer spring sleeve 40, a clamping block 39, a rubber pad 48, an inner spring seat 45, a spring 46, an outer spring seat 47, and an inner hexagonal bolt 43, wherein: the long handle 44 and the short handle 42 are placed on the transverse slide bar 11, the inner spring sleeve 41 is fixed to the long handle 44 or the short handle 42 by the inner hexagonal bolt 43, the outer spring sleeve 40 is sleeved outside the inner spring sleeve 41, and the outer spring sleeve 40 is connected to the clamping block 39 by the inner hexagonal bolt 43, and the clamping block 39 is connected to the rubber pad 48. The inner spring seat 45, the spring 46 and the outer spring seat 47 are placed in the inner spring sleeve 41 and the outer spring sleeve 40, wherein the inner spring seat 45 is connected to the long handle 44 and the short handle 42 by threads, and the outer spring seat 47 is connected to the clamping block 39 by threads; the clamping hands 12 have two pairs of upper and lower pairs, which clamp the plant stems together for stable clamping; the device has multiple pairs of clamping hands 12, which can clamp multiple plants; the built-in spring 46 of the clamping hands 12 can shrink when subjected to force, so as to realize flexible clamping of the plant stems and automatically compensate for the diameter of the clamped stems.

[0039] The synchronous step cylinder 13 includes a pin 131, a primary cylinder 132, a secondary cylinder 133, a tertiary cylinder 134, and a quaternary cylinder 135. The primary cylinder 132 is fixed to the lower horizontal slide bar 11 by the pin 131, and the quaternary cylinder 135 is fixed to the upper horizontal slide bar 11 by the pin 131. The primary cylinder 132, the secondary cylinder 133, the tertiary cylinder 134, and the quaternary cylinder 135 are restricted and moved by internal slideways and cylinder protrusions to adapt to the distance between the clamping hands 12; the synchronous step cylinder 13 connects the upper and lower clamping hands 12 so that they move synchronously on the horizontal slide bar 11 to adjust the distance between the plant stems.

[0040] The isolation plate 14 and the clamping portion 30 are connected to the lower transverse slide bar 37 through a proximal cylinder screw 33 and a distal cylinder screw 38 .

[0041] Working principle of the present invention: The present invention adopts pneumatic method as the power of the clamping device. After the air compressor is connected to the power supply, turn on the power switch, and turn on the airway switch after the air pressure is appropriate, and the gas enters the electromagnetic pneumatic reversing valve. Figure 2 The adjustment distance of the idle stroke adjustment screw is Δx, the cylinder stroke is L, the concave distance of the clamping block is z, the maximum distance between the two clamping hands and the holding block plane when there is no clamping force is f, K is the elastic coefficient, and the spring compression length is Δy=F / K. Since the inclined slide is 45° with the back, when the adjustment distance of the idle stroke adjustment screw is Δx, the two clamping hands and the holding block plane move forward 2Δx in total, and the clamping device clamps the plant diameter range to the minimum diameter D min =2z, maximum diameter D max =2z+2Δy max +f, clamping diameter D = 2Z + 2Δy + f - 2Δx, a certain clamping force is required to maintain a certain stability, so Δx 实际 >Δx. Adjust the electromagnetic pneumatic reversing valve to determine the stroke direction of the double-acting cylinder. When the double-acting cylinder moves forward, it pushes the idle stroke adjustment screw, the push plate and the cylinder stroke block box to move toward the clamping part. The idle stroke adjustment screw can adjust the idle stroke to achieve the purpose of controlling the clamping diameter. After a period of idle stroke, the pull plate and the push rod are pushed to clamp the clamping part; when the double-acting cylinder moves in the opposite direction, after a period of idle stroke, the cylinder stroke block box pulls the pull plate away from the clamping part to move, and the clamping part is loosened. The clamping part converts the linear propulsion movement from the push rod into the lateral clamping and loosening movement of the clamping part through the inclined slide. The fastening screw can adjust the distance between the upper and lower lateral slide bars; the threaded adjustment rod is connected to the clamping hand, and the spacing adjustment nut can adjust the spacing between the clamping hands. The clamping hands have two pairs of upper and lower hands, which clamp the plant stems together and clamp stably; the device has multiple pairs of clamping hands, which can realize the clamping of multiple plants; the built-in spring of the clamping hand can shrink when subjected to force, realize the flexible clamping of the plant stems, and automatically compensate for the diameter of the clamped stems. The synchronous step cylinder includes a pin, a primary cylinder, a secondary cylinder, a tertiary cylinder, and a quaternary cylinder. Each part is restricted and moved by an internal slideway and a cylinder protrusion, and can adapt to the distance between the clamping hands; the synchronous step cylinder connects the upper and lower clamping hands so that they move synchronously on the horizontal slide bar to adjust the distance between the plant stems.

[0042] 2. Application examples

[0043] The present invention adopts pneumatic method as the power of the clamping device. After the air compressor is connected to the power supply, the power switch is turned on. After the air pressure is appropriate, the airway switch is turned on, and the gas enters the electromagnetic pneumatic reversing valve. The electromagnetic pneumatic reversing valve controls the stroke direction of the double-acting cylinder. The cylinder pushes the push rod to move after adjusting the stroke through the empty stroke block box. The push rod converts the linear propulsion movement into the lateral clamping and loosening movement of the holding part through the inclined slide. The built-in spring of the clamping hand part can realize flexible clamping according to the clamping needs, reduce the damage to the plant stems, and finally realize the adjustable flexible clamping of the plant stems.

[0044] The embodiment of the present invention provides a flexible plant stem clamping device, which is used in clamping plant stems.

[0045] 3. Evidence of the effects of the embodiments The embodiments of the present invention have achieved some positive effects during the development or use process, and indeed have great advantages over the prior art.

[0046] Compared with some existing clamping technologies with fixed stroke, non-adjustable clamping force, unstable clamping, complex clamping method, inconvenient installation and use, damage, and inability to clamp, the embodiments of the present invention can achieve relatively stable flexible clamping due to the built-in spring in the clamping hand part. At the same time, due to the existence of the adjusting screw, the clamping distance and clamping force can be adjusted through the idle stroke.

[0047] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any modifications, equivalent substitutions and improvements made by any technician familiar with the technical field within the technical scope disclosed by the present invention and within the spirit and principle of the present invention should be covered by the protection scope of the present invention.

Claims

1. A pneumatic plant stem flexible clamping device, characterized in that: The pneumatic plant stem flexible clamping device comprises: Air compressor; The air compressor is fixed under the workbench table by anchor bolts; the electromagnetic pneumatic reversing valve is placed on the support frame; the electromagnetic pneumatic reversing valve is connected to the air compressor through an air pipe; one end of the reverse stroke air pipe and the forward stroke air pipe is connected to the two gas outlets of the electromagnetic pneumatic reversing valve, and the other end is connected to the cylinder air inlet under the cylinder placement platform; The cylinder placement platform is connected to the workbench table through connecting bolts; the dust cover is placed in the concave surface of the cylinder placement platform; The workbench table is also provided with a double-acting cylinder, which is connected to the cylinder stroke block box by bolts; an idle stroke adjustment screw, a push plate, a pull plate, and a push rod are placed in the cylinder stroke block box, wherein the idle stroke adjustment screw is fixedly connected to the push plate by threads, and the push rod is interference-connected to the pull plate; The clamping part is connected to the push rod through a notch plate, and the notch plate is connected to the long handle through screws on the connecting plate. The clamping part converts the linear propulsion motion from the push rod into a lateral clamping and loosening motion of the clamping part through an inclined slide groove; The clamping part includes a vertical slide bar, a transverse slide bar, a clamping hand, a synchronous step cylinder, a threaded adjustment rod, a spacing adjustment nut, a fastening screw, and a slide groove protection cover; the transverse slide bar is connected to the long handle by a fastening bolt to transmit the transverse movement from the connecting plate, and the vertical slide bar and the transverse slide bar are interference fit; The clamping hand and the synchronous step cylinder are installed on the transverse slide bar; the upper part of the transverse slide bar is fixed to the vertical slide bar by a fastening screw, and the fastening screw can adjust the distance between the upper and lower transverse slide bars; the threaded adjustment rod is connected to the clamping hand, and the spacing adjustment nut can adjust the spacing between the clamping hands.

2. The pneumatic plant stem flexible clamping device according to claim 1, characterized in that: The air supply part of the air compressor includes a power switch, a pressure gauge, an airway switch, and an output air pipe; the air supply part of the air compressor is connected to the input channel of the electromagnetic pneumatic reversing valve; the reverse output channel and the forward output channel of the electromagnetic pneumatic reversing valve are respectively connected to the reverse stroke air pipe and the forward stroke air pipe.

3. The pneumatic plant stem flexible clamping device according to claim 1, characterized in that: The clamping hand comprises a long handle, a short handle, an inner spring sleeve, an outer spring sleeve, a clamping block, a rubber pad, an inner spring seat, a spring, an outer spring seat, and an inner hexagonal bolt, wherein: the long handle and the short handle are placed on the transverse sliding rod, the inner spring sleeve is fixed to the long handle or the short handle by an inner hexagonal bolt, the outer spring sleeve is sleeved outside the inner spring sleeve, the outer spring sleeve is connected to the clamping block by an inner hexagonal bolt, and the clamping block is bonded to the rubber pad; the inner spring seat, the spring, and the outer spring seat are placed in the inner spring sleeve and the outer spring sleeve, wherein the inner spring seat is connected to the long handle and the short handle by a thread, and the outer spring seat is connected to the clamping block by a thread; the clamping hand has two pairs of upper and lower pairs, which clamp the plant stems together and the clamping is stable.

4. The pneumatic plant stem flexible clamping device according to claim 1, characterized in that: The synchronous step cylinder comprises a pin, a primary cylinder, a secondary cylinder, a tertiary cylinder and a quaternary cylinder. The primary cylinder is fixed to the lower transverse slide bar by a pin, and the quaternary cylinder is fixed to the upper transverse slide bar by a pin. The primary cylinder, the secondary cylinder, the tertiary cylinder and the quaternary cylinder are restricted and moved by internal slideways and cylinder protrusions to adapt to the distance between the clamping hands. The synchronous step cylinder connects the upper and lower clamping hands to make them move synchronously on the transverse slide bar to adjust the distance between the plant stems. The isolation plate and the clamping part are connected to the lower transverse sliding rod through a near-cylinder screw and a far-cylinder screw.

5. A control method for the pneumatic plant stem flexible clamping device as claimed in claim 4, characterized in that: The control method comprises: using pneumatic means as the power of the clamping device, after the air compressor is connected to the power supply, turning on the power switch, and turning on the airway switch after the air pressure is appropriate, so that the gas enters the electromagnetic pneumatic reversing valve; adjusting the electromagnetic pneumatic reversing valve to determine the stroke direction of the double-acting cylinder, when the double-acting cylinder moves forward, the idle stroke adjusting screw, the push plate and the cylinder stroke block box are pushed to move toward the clamping part, and the idle stroke adjusting screw can adjust the idle stroke to achieve the purpose of controlling the clamping diameter, and after a period of idle stroke, the pull plate and the push rod are pushed to clamp the clamping part; when the double-acting cylinder moves in the reverse direction, after a period of idle stroke, the cylinder stroke block box pulls the pull plate to move away from the clamping part, and the clamping part is released, and the clamping part converts the linear propulsion motion from the push rod into the lateral clamping and loosening motion of the clamping part through the inclined slide groove; The fastening screw can adjust the distance between the upper and lower horizontal slide bars; the threaded adjustment rod is connected to the clamping hand, and the spacing adjustment nut can adjust the spacing between the clamping hands. The clamping hands have two pairs of upper and lower hands, which clamp the plant stems together and clamp stably; the device has multiple pairs of clamping hands, which can clamp multiple plants; the built-in spring of the clamping hand contracts when it is stressed, so as to achieve flexible clamping of the plant stems and automatically compensate for the diameter of the clamped stems; The synchronous step cylinder includes a pin, a primary cylinder, a secondary cylinder, a tertiary cylinder and a quaternary cylinder. Each part is restricted and moved by an internal slideway and a cylinder protrusion to adapt to the distance between the clamping hands. The synchronous step cylinder connects the upper and lower clamping hands to make them move synchronously on the horizontal slide bar to adjust the distance between the plant stems.

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