Platform for testing shearing force of lithium battery pruning shears

Abstract

A lithium battery pruning shears shearing strength test platform disclosed by the present invention comprises an outer frame assembly, a tension tester and a lithium battery pruning shears assembly, the outer frame assembly comprises a bottom frame and a main frame, the corners of the bottom frame and the main frame are mutually fixed through a sliding rod, the surface of the sliding rod is slidably connected with a mounting seat, the tension tester is fixed on one side of the mounting seat, and the tension tester is fixed on the other side of the mounting seat. The opposite sides, close to the main frame and the mounting base, of the surfaces of the sliding rods are sleeved with damping springs, and the mounting base is elastically connected with the main frame through the damping springs. The bottom of one side of the main frame is fixedly connected with a base, a fixing assembly is arranged on the top of the base in a longitudinal sliding mode and comprises a placement base and a reset spring, the bottom of the placement base is elastically connected with the base through the reset spring, and the lithium battery pruning shear assembly comprises a lithium battery handle, a movable cutter and a fixed cutter. According to the invention, a better testing environment can be effectively provided for the tester and the cutter, the phenomenon that the steel wire rope is broken is prevented, and the testing precision can be effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of force testing devices, and in particular to a testing platform for the shearing force of lithium-electric pruning shears. Background Art

[0002] Lithium-powered pruning shears are popular among the agricultural industry because of their portability, labor-saving and practicality. Pruning shears of the same caliber will produce different shearing forces due to the different internal lithium batteries, control panels, reducer boxes and other accessories. The shearing force is an intuitive reflection of the quality of a pair of pruning shears. Rapidly detecting the shearing force of pruning shears with different configurations is extremely important for product development and testing.

[0003] At present, the shear force test of lithium-ion pruning shears is mostly carried out by clamping the moving blade of the shear knife with a tensile tester. After the shear knife is started, the tensile tester tests the peak tensile force of the blade during the shearing process, so as to understand the specific quality of the lithium-ion pruning shears. However, the following problems may occur in the actual test process:

[0004] 1. During the test, the tension generated by the pruning shears during shearing will drive the tensile tester to move a certain distance in the frame. The tension generated in this process will directly act on the wire rope between the cutter and the tester. After long-term testing and use, the connection between the two ends of the wire rope is unstable and may break, causing the tester and the cutter to rush out in opposite directions, which is very likely to cause stress damage and poses certain safety hazards;

[0005] 2. During the clamping test of the moving blade of the lithium-ion pruning shears, the moving blade moves in an arc, which will generate an oblique pulling force on the wire rope. The change in the direction of force will further increase the probability of the wire rope breaking. When clamping at different positions on the surface of the moving blade, due to the existence of a lever effect, the actual detection values ​​may vary greatly, affecting the shear force detection accuracy of the lithium-ion pruning shears.

[0006] Therefore, how to provide a testing platform for the shearing force of lithium-ion pruning shears is a problem that those skilled in the art need to solve urgently. Summary of the invention

[0007] An object of the present invention is to provide a testing platform for the shearing force of lithium-electric pruning shears. The present invention can effectively provide a better testing environment for the tester and the cutter, prevent the wire rope from breaking, and effectively improve the testing accuracy.

[0008] A testing platform for the shearing force of lithium-ion pruning shears according to an embodiment of the present invention comprises an outer frame assembly, a tensile tester and a lithium-ion pruning shears assembly, wherein the outer frame assembly comprises a bottom frame and a main frame, the bottom frame and the main frame are fixed to each other at their corners by a sliding rod, the surface of the sliding rod is slidably connected to a mounting seat, the tensile tester is fixed to one side of the mounting seat, the surface of the sliding rod is sleeved with a damping spring on the opposite side of the main frame and the mounting seat, and the mounting seat is elastically connected to the main frame through the damping spring;

[0009] The bottom of one side of the main frame is fixedly connected to the base, and a fixing component is longitudinally slidably disposed on the top of the base, the fixing component includes a placement seat and a reset spring, the bottom of the placement seat is elastically connected to the base through the reset spring, the lithium-powered pruning shear assembly includes a lithium-powered handle, a movable blade and a fixed blade, the lithium-powered handle is fixed to the fixed blade, the movable blade is transmission-connected to the output end of the lithium-powered handle, and the lithium-powered handle is arranged on the top of the placement seat;

[0010] One side of the main frame is movably connected with a clamping seat through a longitudinally movable monitoring component, and the monitoring end of the tensile tester is fixed to the clamping seat through a steel wire rope;

[0011] A protection mechanism is fixedly connected to the surface of the main frame, and two ends of the protection mechanism are movably connected to the slide rod and the mounting seat respectively, and the protection mechanism provides buffer damping between the slide rod and the mounting seat relative to the main frame.

[0012] Furthermore, a conical push rod is fixed on the surface of the mounting seat, and the conical push rod slides through the main frame, and one end of the conical push rod is in contact with a wedge panel opened on the surface of the mounting seat, and the conical push rod and the wedge panel are in wedge-like contact.

[0013] Furthermore, the steel wire rope at the monitoring end of the tensile tester clamps the surface of the moving knife through a tool clamp mechanism, and the tool clamp mechanism includes a clamping seat and two sets of rubber clamping pads. The surface of the clamping seat is rotatably connected to a shaft rod through a shaft sleeve, and the main teeth are fixed on the upper and lower sides of the shaft rod respectively and a knob is fixed on the top. One side of the main tooth engages with a threaded sleeve, and the threaded sleeve and the clamping seat are limited in rotation.

[0014] Furthermore, the threaded sleeve is threadedly connected to the screw at the axial center position, and the rubber clamping pad is limited and rotated at the end of the screw by an axle pin, and the two groups of rubber clamping pads clamp the surface of the moving knife.

[0015] Furthermore, the longitudinal movement monitoring assembly includes two groups of folding rods and sliders. The rotation positions of the two groups of folding rods are movably connected to the upper and lower sides of the clamping seat respectively. The two ends of the folding rods are movably connected to the sliders through rotating pins respectively. The sliders slide horizontally in the slide grooves on the surface of the main frame.

[0016] Furthermore, a resistor is fixed in the slide groove on the surface of the main frame, and a contact protrusion is fixedly connected to a side of the slider close to the resistor, and the contact protrusion is electrically connected to the surface of the resistor in a sliding manner.

[0017] Furthermore, a positioner and a detection probe are also provided on the top of the mounting seat, and the mounting seat clamps and fixes the fixed knife through the positioner, and the bottom of the detection probe is aligned with the rotation axis of the movable knife and the lithium battery handle.

[0018] Furthermore, the protection mechanism includes a connecting tube and two groups of piston rods. The two ends of the connecting tube are respectively provided with retracted cavities, and the two groups of piston rods are respectively telescoped in the retracted cavities at both ends of the connecting tube. The ends of the two groups of piston rods away from the connecting tube are respectively fixed to the mounting seat and the clamping seat.

[0019] Furthermore, a through hole is provided on the surface of the connecting tube at a position where the two groups of shrinkage cavities are close to each other, and the through hole is connected to the air outlet cavity at the bottom of the connecting tube. The air outlet cavity is fixed at the bottom of the connecting tube, and a conical groove is provided on the top wall of the inner surface of the air outlet cavity.

[0020] Furthermore, a cone convex is elastically arranged inside the air outlet cavity through a tension spring, the cone surface of the cone convex is aligned with the surface of the cone groove, and a through hole is provided at the bottom of the air outlet cavity.

[0021] The beneficial effects of the present invention are:

[0022] The present invention arranges a protection mechanism on the surface of the main frame, and the two ends of the connecting tube are respectively connected to the mounting seat and the clamping seat through a telescopic piston rod. Therefore, when the wire rope breaks during the actual test process, a strong force will accelerate the piston rod in the retracted cavity to be pulled out, and the bottom of one side of the retracted cavity is connected to the air outlet cavity. At this time, the air pressure will rush into the retracted cavity through the air outlet cavity, thereby driving the conical surface groove and the conical convexity to approach each other, reducing the air inlet, thereby achieving the negative pressure inside the retracted cavity and the damping effect of the piston rod, greatly reducing the impact speed when the wire rope breaks, and effectively protecting the tensile tester and the tool connected to one side of the clamping seat;

[0023] The present invention arranges a longitudinal movement monitoring component between the clamping seat and the main frame. When the steel wire rope connected between the clamping seat and the tensile tester deflects an angle during the test, that is, the surface clamping seat moves obliquely, the clamping seat pulls the sliders on both sides of the folding rod to slide different distances in the surface slide groove of the main frame. A resistor is arranged in the slide groove of the main frame, and the slider is electrically connected to the resistor through a contact protrusion, so that the sliding distance can be detected by the resistor, so that the specific swing amplitude of the current clamping seat can be obtained through external numerical calculation, thereby improving the detection effect.

[0024] The present invention provides a conical push rod at the bottom of the mounting seat, the conical push rod slides through the bottom of the main frame and the end of the conical push rod is wedge-connected with the wedge surface on the surface of the mounting seat. When the movable knife rotates, the mounting seat is pulled to move in the direction of the main frame. At the same time, the conical push rod also squeezes the wedge surface, so that the mounting seat is forced to slide to one side at the top of the base and squeeze the reset spring, thereby changing the longitudinal position of the clamping point between the movable knife and the rubber clamping pad. This effect can effectively adapt to the rotation test of the movable knife, prevent the deflection of the wire rope, thereby providing a safe test environment and preventing the wire rope from being broken due to stress.

[0025] The present invention arranges a detection probe on the top of the mounting seat. Since the position of the detection probe is fixed, when the lithium battery handle is installed and fixed, the rotation position of the lithium battery handle and the moving knife can be placed directly below the detection probe and calibrated by the detection probe, so that the specified position of the moving knife contacts the rubber clamping pad, thereby ensuring that the distance between the rotation center position of the moving knife and the lithium battery handle and the rubber clamping pad is kept constant, thereby effectively achieving a constant test force. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0027] Figure 1 A bird's-eye view of the overall structure of a testing platform for the shearing force of lithium-electric pruning shears proposed by the present invention;

[0028] Figure 2 A lateral bird's-eye view of the overall structure of a testing platform for the shearing force of lithium-electric pruning shears proposed in the present invention.

[0029] Figure 3 This is a schematic diagram of the lateral connection structure of a mounting base for a testing platform for the shearing force of lithium-ion pruning shears proposed in the present invention.

[0030] Figure 4 This is a schematic diagram of the top structural connection of a base of a testing platform for the shearing force of lithium-ion pruning shears proposed in the present invention.

[0031] Figure 5 This is a schematic diagram of the structural connection of the longitudinal movement monitoring component of a testing platform for the shearing force of lithium-electric pruning shears proposed in the present invention.

[0032] Figure 6 A testing platform for the shearing force of lithium-ion pruning shears proposed by the present invention Figure 1 A magnified schematic diagram of the structure at point A.

[0033] Figure 7 A testing platform for the shearing force of lithium-ion pruning shears proposed by the present invention Figure 3 Enlarged schematic diagram of the structure at point B.

[0034] Figure 8 A test platform for the shearing force of lithium-electric pruning shears proposed in the present invention is a schematic diagram of the force motion analysis of the lithium-electric pruning shears assembly.

[0035] In the figure: 1. outer frame assembly; 2. tensile tester; 3. knife clamp mechanism; 4. base; 5. fixing assembly; 6. lithium battery pruning shears assembly; 7. longitudinal movement monitoring assembly; 8. conical push rod; 9. wedge surface; 10. protection mechanism;

[0036] 11. Bottom frame; 12. Main frame; 13. Slide bar; 14. Mounting seat; 15. Damping spring; 31. Clamping seat; 32. Knob; 33. Main tooth; 34. Threaded sleeve; 35. Screw; 36. Rubber clamping pad; 51. Mounting seat; 52. Reset spring; 53. Positioner; 54. Detection probe; 61. Lithium battery handle; 62. Moving knife; 63. Fixed knife; 71. Folding rod; 72. Slider; 73. Contact convex; 74. Resistor; 101. Connecting tube; 102. Retracted cavity; 103. Piston rod; 104. Exhaust cavity; 105. Conical groove; 106. Conical convex; 107. Tension spring. DETAILED DESCRIPTION

[0037] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0038] refer to Figure 1-Figure 8 , including an outer frame assembly 1, a tensile tester 2 and a lithium-electric pruning shear assembly 6, the outer frame assembly 1 includes a bottom frame 11 and a main frame 12, the bottom frame 11 and the main frame 12 are fixed to each other at the corners by a sliding rod 13, the surface of the sliding rod 13 is slidably connected to a mounting seat 14, the tensile tester 2 is fixed to one side of the mounting seat 14, the surface of the sliding rod 13 is close to the main frame 12 and the opposite side of the mounting seat 14 is sleeved with a damping spring 15, and the mounting seat 14 is elastically connected to the main frame 12 through the damping spring 15;

[0039] The bottom of one side of the main frame 12 is fixedly connected to the base 4, and a fixing component 5 is longitudinally slidably disposed on the top of the base 4. The fixing component 5 includes a placement seat 51 and a reset spring 52. The bottom of the placement seat 51 is elastically connected to the base 4 through the reset spring 52. The lithium-powered pruning shear assembly 6 includes a lithium-powered handle 61, a movable blade 62, and a fixed blade 63. The lithium-powered handle 61 is fixed to the fixed blade 63, and the movable blade 62 is transmission-connected to the output end of the lithium-powered handle 61. The lithium-powered handle 61 is arranged on the top of the placement seat 51.

[0040] One side of the main frame 12 is movably connected to a clamping seat 31 through a longitudinally movable monitoring assembly 7, and the monitoring end of the tension tester 2 is fixed to the clamping seat 31 through a steel wire rope;

[0041] A protection mechanism 10 is fixedly connected to the surface of the main frame 12 , and two ends of the protection mechanism 10 are movably connected to a slide bar 13 and a mounting seat 14 , respectively. The protection mechanism 10 provides buffer damping between the slide bar 13 and the mounting seat 14 relative to the main frame 12 .

[0042] In this embodiment, the bottom frame 11, the main frame 12 and the slide bar 13 form a general frame structure, which satisfies the sliding effect of the mounting seat 14 on the surface of the slide bar 13. At the same time, a damping spring 15 is set on the surface of the slide bar 13 on the opposite side of the mounting seat 14 and the main frame 12 to achieve an elastic damping effect. The tension tester 2 is directly fixed on one side of the mounting seat 14, and its force-bearing end is connected to the clamping seat 31 through a wire rope to realize the basic composition. The lithium-ion pruning shear assembly 6 is arranged as a whole on the mounting seat 51, and the top of the mounting seat 51 can be hinged. The clamping plate is rotated to clamp and fix the lithium battery handle 61, and the movable knife 62 is clamped and set with the clamping seat 31, so as to form a basic detection device as a whole. When the movable knife 62 shears at the output end of the lithium battery handle 61, the tensile tester 2 on one side of the mounting seat 14 is pulled by the wire rope, so that the tensile tester 2 and the mounting seat 14 are close to the main frame 12 and squeeze the damping spring 15, so as to realize the shear force detection of the tensile tester 2. After the detection is completed, the damping spring 15 elastically resets the mounting seat 14 and the tensile tester 2.

[0043] In the actual detection process, the moving knife 62 moves in an arc direction. Figure 8 At this time, the clamping seat 31 will be driven to move obliquely. At the same time, a longitudinal movement monitoring component 7 is arranged between the clamping seat 31 and the main frame 12. The oblique movement of the clamping seat 31 will be monitored by the longitudinal movement monitoring component 7, so as to feedback data to the outside world, so that the operator can understand the current swing amplitude of the clamping seat 31, or the wire rope, and then take measures to control the actual test environment to prevent the wire rope from breaking and falling off between the connection end and the tension tester 2 or the clamping seat 31 due to excessive swing of the wire rope;

[0044] If the steel wire rope connecting the clamping seat 31 and the tension tester 2 ages and breaks due to long-term use or other circumstances, under the elastic force of the damping spring 15 and the shearing effect of the movable knife 62 and the lithium battery handle 61, the tension tester 2 and the clamping seat 31 will produce a large acceleration and thus high-speed lateral movement. At this time, the clamping seat 31 and the mounting seat 14 will drive the protection mechanism 10 to move relative to each other, and the protection mechanism 10 is connected to the main frame 12, so that the protection mechanism 10 can provide a strong speed reduction damping effect, thereby protecting the internal components of the tension tester 2 and the connection between the movable knife 62 and the lithium battery handle 61, and preventing stress damage.

[0045] refer to Figure 3 and Figure 4The conical push rod 8 is fixed on the surface of the mounting seat 14, and the conical push rod 8 slides through the main frame 12. One end of the conical push rod 8 is in contact with the wedge panel 9 opened on the surface of the mounting seat 51, and the conical push rod 8 and the wedge panel 9 are in wedge contact.

[0046] In the present embodiment, when the steel wire rope pulls the mounting seat 14 and the tension tester 2 to move toward one side of the main frame 12, the mounting seat 14 will synchronously drive the conical push rod 8 at the bottom to slide at the bottom of the main frame 12, and at the same time, one end of the conical push rod 8 is wedge-connected with the wedge surface 9 opened at the bottom of the mounting seat 51. The wedge connection here refers to the contact between the end face of the conical push rod 8 and the inclined surface of the wedge surface 9. Under the extrusion pressure, the mounting seat 51 will drive the lithium-ion pruning shears assembly 6 as a whole to one side for a distance, thereby cooperating with the arc rotation of the movable knife 62, and then balancing the connection between the steel wire rope and the tension tester 2 and the clamping seat 31, and preventing the steel wire rope from angular deviation.

[0047] refer to Figure 5 and Figure 6 The steel wire rope at the monitoring end of the tension tester 2 is clamped on the surface of the moving knife 62 through the knife clamp mechanism 3. The knife clamp mechanism 3 includes a clamping seat 31 and two sets of rubber clamping pads 36. The surface of the clamping seat 31 is rotatably connected to a shaft through a shaft sleeve. The upper and lower sides of the shaft are respectively fixed with main teeth 33 and the top is fixedly connected with a knob 32. One side of the main teeth 33 engages with a threaded sleeve 34, and the threaded sleeve 34 and the clamping seat 31 are limited to rotate. The threaded sleeve 34 is threadedly connected to the screw 35 at the axial position, and the rubber clamping pad 36 is limited to rotate at the end of the screw 35 through an axle pin. The two sets of rubber clamping pads 36 clamp the surface of the moving knife 62.

[0048] In this embodiment, after the knob 32 is turned, the knob 32 can drive the two sets of main teeth 33 to rotate on the upper and lower sides of the clamping seat 31 through the shaft below, and at the same time, one side of the main teeth 33 engages with the threaded sleeve 34, and the threaded sleeve 34 is limited to rotate on one side of the clamping seat 31. At the same time, the threaded sleeve 34 is threadedly connected to the screw 35. When the position of the threaded sleeve 34 is limited, and the top of the screw 35 is limited, the limit here refers to preventing the screw 35 from rotating or the clamping seat from rotating by pressing. The screw rod 35 is limited by the limiting rod 31. At this time, the screw rod 35 moves up and down under the action of the thread transmission force, driving the rubber clamping pad 36 to clamp the upper and lower surfaces of the movable knife 62. The rubber clamping pad 36 and the screw rod 35 are rotated by the shaft pin. The rotation effect can effectively prevent the rubber clamping pad 36 from twisting during the test of the movable knife 62, thereby effectively improving the stability of the rubber clamping pad 36 clamping the surface of the movable knife 62 and preventing the rubber clamping pad 36 and the movable knife 62 from slipping.

[0049] refer to Figure 3 and Figure 5The longitudinal movement monitoring assembly 7 includes two groups of folding rods 71 ​​and a slider 72. The rotation positions of the two groups of folding rods 71 ​​are respectively movably connected to the upper and lower sides of the clamping seat 31. The two ends of the folding rod 71 are respectively movably connected to the slider 72 through a rotating pin. The slider 72 slides horizontally in the slide groove on the surface of the main frame 12. A resistor 74 is also fixed in the slide groove on the surface of the main frame 12. The side of the slider 72 close to the resistor 74 is fixedly connected to the contact protrusion 73, and the contact protrusion 73 is electrically connected to the surface of the resistor 74 in a sliding manner.

[0050] In the present embodiment, in the process of actually detecting the shear force, the deflection of the wire rope objectively exists. Even if the movement of the conical push rod 8 and the wedge surface 9 drives the placement seat 51 to move longitudinally, the problem cannot be completely solved. A better detection environment can only be provided by reducing the deflection angle. When the clamping seat 31 is deflected by the shearing movement of the moving knife 62, the clamping seat 31 will synchronously pull the sliders 72 at both ends of the folding rod 71 to slide in the slide groove on the surface of the main frame 12. Since the deflection direction points to one side, the sliders 72 at both ends of the folding rod 71 actually slide in the slide groove. The amount is different, and the sliding of the slider 72 will drive the contact protrusion 73 and the resistor 74 in the slide groove to change position, so that the current transmitted from the contact protrusion 73 to the resistor 74 changes, which is monitored by the external control device, so as to judge the specific swing angle of the current clamping seat 31 by the current and voltage. It can be understood here as a common sliding rheostat. The change of the contact position between the contact protrusion 73 and the resistor 74 causes the actual resistance to increase, thereby obtaining different current and voltage. As for how the contact protrusion 73 generates current, it can be achieved by setting electronic chips and other products, which will not be repeated here.

[0051] refer to Figure 4 A positioner 53 and a detection probe 54 are also provided on the top of the placement seat 51. The placement seat 51 clamps and fixes the fixed knife 63 through the positioner 53, and the bottom of the detection probe 54 is aligned with the rotation axis of the movable knife 62 and the lithium battery handle 61.

[0052] In the present embodiment, the setting of the positioner 53 can fix the fixed knife 63 to meet the test effect of the movable knife 62, and the detection probe 54 monitors the active position of the movable knife 62 and the lithium battery handle 61. In the actual installation process, by aligning the rotation center of the lithium battery handle 61 and the movable knife 62 under the detection probe 54, the contact position of the rubber clamping pad 36 and the movable knife 62 is the standard contact position, thereby preventing the rubber clamping pad 36 from contacting the movable knife 62 at different positions due to the existence of the lever principle, causing the actual force to change, thereby affecting the actual detection of the shear force. Here, it means that when the rubber clamping pad 36 is away from the center of the movable knife 62 and the lithium battery handle 61, the shear force detected by the tensile tester 2 will be smaller than the actual shear force, and vice versa, the closer it is, the closer it is to the actual shear force provided.

[0053] refer to Figure 3 and Figure 7 The protection mechanism 10 includes a connecting tube 101 and two groups of piston rods 103. The two ends of the connecting tube 101 are respectively provided with retracted cavities 102. The two groups of piston rods 103 are respectively telescoped in the retracted cavities 102 at the two ends of the connecting tube 101. The ends of the two groups of piston rods 103 away from the connecting tube 101 are respectively fixed to the mounting seat 14 and the clamping seat 31. A through hole is provided on the surface of the connecting tube 101 at a position where the two groups of retracted cavities 102 are close to each other. The through hole is connected to the air outlet cavity 104 at the bottom of the connecting tube 101. The air outlet cavity 104 is fixed at the bottom of the connecting tube 101. A conical groove 105 is provided at the top wall position of the inner surface of the air outlet cavity 104. A conical convex 106 is elastically provided inside the air outlet cavity 104 through a tension spring 107. The conical surface of the conical convex 106 is aligned with the surface of the conical groove 105. A through hole is provided at the bottom of the air outlet cavity 104.

[0054] In the present embodiment, when the steel wire rope between the clamping seat 31 and the tension tester 2 breaks, the force provided by the damping spring 15 and the movable knife 62 will pull the clamping seat 31 and the mounting seat 14 to move in opposite directions at high speed. During this process, the mounting seat 14 and the clamping seat 31 will respectively drive the piston rod 103 to be withdrawn in opposite directions in the retracted cavity 102 at both ends of the connecting tube 101. During this process, the internal air pressure of the retracted cavity 102 is in a negative pressure state, and the suction effect will drive the conical protrusion 106 to move upward in the air outlet cavity 104 and approach the conical groove 105, so that the actual air inlet cavity is reduced, thereby reducing the withdrawal speed of the piston rod 103 under the action of negative pressure, and then reducing the movement speed of the clamping seat 31 and the mounting seat 14, thereby effectively protecting the tension tester 2 and the lithium-ion pruning shear assembly 6.

[0055] Working principle: First, place the lithium battery handle 61 on the top of the mounting seat 51, and place the rotation position of the lithium battery handle 61 and the movable knife 62 under the detection probe 54 for calibration. Then fix the lithium battery handle 61 on the top of the mounting seat 51, and fix the fixed knife 63 on the mounting seat 51 through the positioner 53. Then, rotate the knob 32 on one side of the clamping seat 31, and the knob 32 drives the rotating shaft and the main tooth 33 to rotate on one side of the clamping seat 31. The threaded tooth sleeve 34 engaged with the main tooth 33 rotates, so that the screw 35 drives the rubber clamping pad 36 to contact and clamp the specified position on the surface of the movable knife 62, thereby completing the basic assembly.

[0056] During the test, the lithium battery handle 61 is started to drive the movable knife 62 to rotate. The movable knife 62 pulls the tension tester 2 on one side of the mounting seat 14 through the clamping seat 31 and the wire rope, so that the mounting seat 14 slides on the surface of the slide bar 13 while squeezing the damping spring 15. At this time, the mounting seat 14 is close to the main frame 12, and the tension tester 2 detects the shear force of the movable knife 62. During the detection, the mounting seat 14 will drive the conical push rod 8 to push the wedge surface 9 at the bottom of the placement seat 51, so that the placement seat 51 is forced to move longitudinally at the top of the base 4, thereby cooperating with the rotation of the movable knife 62 to reduce the deflection of the clamping seat 31 and the wire rope. At the same time, the slight deflection of the clamping seat 31 will drive the sliders 72 at both ends of the folding rod 71 to slide a certain distance in the sliding groove on the surface of the main frame 12, and the contact position of the contact protrusion 73 and the resistor 74 will change, and the resistance will increase, thereby changing the actual output voltage, and then understanding the current deflection angle of the clamping seat 31 and the wire rope, and monitoring the current detection environment;

[0057] When the wire rope breaks, the clamping seat 31 and the mounting seat 14 will respectively move in opposite directions under the action of the movable knife 62 and the damping spring 15. At this time, the clamping seat 31 and the mounting seat 14 will drive the piston rod 103 to be withdrawn from the retracted cavity 102 at both ends of the connecting tube 101. During the withdrawal process, the internal air pressure of the retracted cavity 102 decreases, and the gas enters the retracted cavity 102 through the inlet hole at the bottom of the air outlet cavity 104, while driving the conical protrusion 106 and the conical groove 105 to approach and stretch the tension spring 107, and the air inlet cavity is reduced, so that the suction speed of the piston rod 103 is reduced under the action of the negative pressure inside the retracted cavity 102, thereby protecting the use of the tension tester 2, the movable knife 62 and the tool clamping mechanism 3. Under normal speed conditions, the piston rod 103 can achieve normal movement inside the retracted cavity 102, thereby meeting the normal test effect.

[0058] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A testing platform for the shearing force of lithium-ion pruning shears, characterized in that: The invention comprises an outer frame component (1), a tension tester (2) and a lithium-ion pruning shear assembly (6), wherein the outer frame component (1) comprises a bottom frame (11) and a main frame (12), wherein the bottom frame (11) and the main frame (12) are fixed to each other at their corners by a sliding rod (13), wherein the surface of the sliding rod (13) is slidably connected to a mounting seat (14), wherein the tension tester (2) is fixed to one side of the mounting seat (14), and a damping spring (15) is sleeved on the opposite side of the surface of the sliding rod (13) close to the main frame (12) and the mounting seat (14), and the mounting seat (14) is elastically connected to the main frame (12) by the damping spring (15); The bottom of one side of the main frame (12) is fixedly connected to the base (4); the top of the base (4) is provided with a fixing assembly (5) which slides longitudinally; the fixing assembly (5) comprises a placement seat (51) and a reset spring (52); the bottom of the placement seat (51) is elastically connected to the base (4) via the reset spring (52); the lithium-electric pruning shear assembly (6) comprises a lithium-electric handle (61), a movable blade (62) and a fixed blade (63); the lithium-electric handle (61) is fixed to the fixed blade (63); the movable blade (62) is transmission-connected to the output end of the lithium-electric handle (61); and the lithium-electric handle (61) is arranged on the top of the placement seat (51); One side of the main frame (12) is movably connected to a clamping seat (31) via a longitudinally movable monitoring assembly (7), and the monitoring end of the tensile tester (2) is fixed to the clamping seat (31) via a steel wire rope; A protection mechanism (10) is fixedly connected to the surface of the main frame (12), and two ends of the protection mechanism (10) are movably connected to a slide bar (13) and a mounting seat (14), respectively. The protection mechanism (10) provides buffer damping between the slide bar (13) and the mounting seat (14) relative to the main frame (12).

2. A testing platform for the shearing force of lithium-ion pruning shears according to claim 1, characterized in that: A conical push rod (8) is fixed on the surface of the mounting seat (14), and the conical push rod (8) slides through the main frame (12). One end of the conical push rod (8) is in contact with a wedge panel (9) provided on the surface of the placement seat (51), and the conical push rod (8) and the wedge panel (9) are in wedge-type contact.

3. A testing platform for the shearing force of lithium-ion pruning shears according to claim 1, characterized in that: The steel wire rope at the monitoring end of the tension tester (2) clamps the surface of the moving knife (62) through a knife clamp mechanism (3), and the knife clamp mechanism (3) comprises a clamping seat (31) and two sets of rubber clamping pads (36). The surface of the clamping seat (31) is rotatably connected to a shaft rod through a shaft sleeve, and the main teeth (33) are respectively fixed on the upper and lower sides of the shaft rod, and a knob (32) is fixedly connected to the top. One side of the main teeth (33) engages with a threaded tooth sleeve (34), and the threaded tooth sleeve (34) and the clamping seat (31) are limited in rotation.

4. A testing platform for the shearing force of lithium-ion pruning shears according to claim 3, characterized in that: The threaded sleeve (34) is threadedly connected to the screw rod (35) at the axial position, and the rubber clamping pad (36) is rotated on the end of the screw rod (35) through the axis pin, and the two groups of rubber clamping pads (36) clamp the surface of the movable knife (62).

5. A testing platform for the shearing force of lithium-ion pruning shears according to claim 1, characterized in that: The longitudinal movement monitoring assembly (7) comprises two groups of folding rods (71) and a sliding block (72). The rotation positions of the two groups of folding rods (71) are movably connected to the upper and lower sides of the clamping seat (31) respectively. The two ends of the folding rods (71) are movably connected to the sliding block (72) respectively through a rotating pin. The sliding block (72) slides transversely in a sliding groove on the surface of the main frame (12).

6. A testing platform for the shearing force of lithium-ion pruning shears according to claim 5, characterized in that: A resistor sheet (74) is also fixed in the sliding groove on the surface of the main frame (12), and a side of the slider (72) close to the resistor sheet (74) is fixedly connected to a contact protrusion (73), and the contact protrusion (73) is electrically connected to the surface of the resistor sheet (74) by sliding.

7. A testing platform for the shearing force of lithium-ion pruning shears according to claim 1, characterized in that: A positioner (53) and a detection probe (54) are also provided on the top of the placement seat (51); the placement seat (51) clamps and fixes the fixed knife (63) through the positioner (53); and the bottom of the detection probe (54) is aligned with the rotation axis of the movable knife (62) and the lithium battery handle (61).

8. A testing platform for the shearing force of lithium-ion pruning shears according to claim 1, characterized in that: The protection mechanism (10) comprises a connecting tube (101) and two groups of piston rods (103). The two ends of the connecting tube (101) are respectively provided with retracted cavities (102). The two groups of piston rods (103) are respectively telescoped in the retracted cavities (102) at the two ends of the connecting tube (101). The ends of the two groups of piston rods (103) away from the connecting tube (101) are respectively fixed to the mounting seat (14) and the clamping seat (31).

9. A testing platform for the shearing force of lithium-ion pruning shears according to claim 8, characterized in that: A through hole is provided on the surface of the connecting tube (101) at a position where the two groups of shrinkage cavities (102) are close to each other. The through hole is connected to an air outlet cavity (104) at the bottom of the connecting tube (101). The air outlet cavity (104) is fixed at the bottom of the connecting tube (101). A conical groove (105) is provided on the top wall of the inner surface of the air outlet cavity (104).

10. A testing platform for the shearing force of lithium-ion pruning shears according to claim 9, characterized in that: A conical protrusion (106) is elastically arranged inside the air outlet cavity (104) via a tension spring (107), the conical surface of the conical protrusion (106) is aligned with the surface of the conical groove (105), and a through hole is provided at the bottom of the air outlet cavity (104).

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