CN210610542U - Rubber tapping machine - Google Patents

Rubber tapping machine Download PDF

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Publication number
CN210610542U
CN210610542U CN201920734937.XU CN201920734937U CN210610542U CN 210610542 U CN210610542 U CN 210610542U CN 201920734937 U CN201920734937 U CN 201920734937U CN 210610542 U CN210610542 U CN 210610542U
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CN
China
Prior art keywords
tapping machine
spiral guide
guide rail
rubber
knife
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CN201920734937.XU
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Chinese (zh)
Inventor
许振昆
吴纪营
张兴明
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Ningbo Zhongchuang Hanwei Technology Co Ltd
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Ningbo Zhongchuang Hanwei Technology Co Ltd
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Abstract

The utility model discloses a rubber tapping machine, which comprises two supporting steel pipes, wherein one side of each supporting steel pipe is connected with each other through a binding band, the other side of each supporting steel pipe is connected with each other through an upper spiral guide rail and a lower spiral guide rail, and the spiral guide rails are opposite to the binding bands on the opposite sides of the spiral guide rails; rubber tapping machine still include the knife rest assembly of electrified machine and limit switch, the rolling power wheel of helical guideway can be followed to each installation of both ends about the power steel shaft of this knife rest assembly, still follow a lead screw and more than one dead lever of vertical direction installation on this knife rest assembly in addition, the lower extreme of lead screw falls the sword gyro wheel through one-way bearing installation, the utility model discloses a rubber tapping machine to automatic machinery replaces artifically, has realized the unmanned automatic rubber tapping of rubber tree, and it is big that artifical rubber tapping intensity of labour has been solved to the at utmost to and the problem that artifical rubber tapping is not refined enough.

Description

Rubber tapping machine
Technical Field
The utility model relates to the field of agricultural machinery, specific tapping machine that is used for rubber tree bark cutting in specific saying so relates to this field.
Background
Since the discovery of natural rubber from rubber trees, the method for forming rubber bark into a rubber slide way is always to manually cut by a rubber cutter; although electric tapping knives are beginning to appear in recent times, manual hand-held operation is still required.
The Chinese patent application CN104429813A discloses a rubber tapping machine, which comprises a tree binding fixing frame and two annular planetary gear shells respectively arranged at the upper end and the lower end of the tree binding fixing frame, wherein a vector moving tool rest assembly is arranged between the two annular planetary gear shells; a gear shaft is arranged on the vector moving tool rest assembly, and a motor and a tapping tool rest with a gear rack are arranged in the vector moving tool rest assembly; the rubber tapping knife rest is internally provided with a rubber tapping knife assembly, the top end of the rubber tapping knife assembly is connected with a lead screw, and the rubber tapping knife assembly can move up and down in the rubber tapping knife rest by rotating the lead screw. The shape of the annular planetary gear shell of the rubber tapping machine is fixed, the annular planetary gear shell cannot be adjusted according to the thickness of a rubber trunk, if the rubber trunk is thin, the force arm between the rubber tapping knife assembly and the rubber trunk is long, rubber tapping is labor-consuming, and the effect is poor; the tapping knife rest adopts a gear and rack transmission mode, so that the failure rate is high and the installation is troublesome; the lead screw extends out of the rubber tapping machine, so that the lead screw not only occupies large space and influences the overall appearance, but also is easy to damage; in addition, the cutter head of the rubber tapping machine is fixed, the surface of the rubber bark is irregular, and the structure ensures that the rubber tapping machine can not cut the concave part of the surface of the rubber bark and is easily clamped by the convex part of the surface of the rubber bark in the rubber tapping process, so that the problem of continuous cutting of the surface of the irregular rubber bark can not be well solved.
The Chinese patent application CN106034980A discloses an automatic rubber cutting robot, which comprises a clamping mechanism, a cutting depth adjusting mechanism, a power device and a cutting track control mechanism. The clamping mechanism consists of a rotating block and a supporting rod; the cutting depth adjusting mechanism consists of a rotary disk with scales, a movable positioning wheel and a tool rest; the power is provided by a stepping motor; the cutting track control mechanism comprises an upper annular track, a lower annular track, a trolley driving mechanism and a lead screw nut mechanism. The automatic rubber cutting robot is clamped on a rubber tree through the clamping mechanism, the cutting track is made to be in a spiral shape through the cutting track control mechanism, line changing cutting is achieved through the lead screw nut, and finally the proper cutting depth is adjusted through the cutting depth adjusting mechanism, so that automatic rubber tapping is achieved. The robot has the following problems:
(1) the mechanism for fixing the tree is unrealistic, in the rubber tapping process, the relative force between the movable module and the tree can reach dozens of kilograms, and the balance of the force in all directions in the rubber tapping process can not be met only by fixing the movable module and the tree at two points on one side.
(2) The vector superposition motion in the rubber tapping process is controlled by two stepping motors, so that the hidden trouble of poor rubber tapping precision exists, the distance between two times of rubber tapping is very small, the two motors are possibly asynchronous in the matching process, the motor is very unstable, if deviation occurs at the beginning of cutting, the final tangent point positions of the two cutters have great deviation, trees are damaged, and the yield is also influenced.
(3) The circular orbit of this patent is for the arc track with the rubber tree is concentric, and is comparatively harsh to the requirement of tree, and the tree footpath undersize can not cut, and the too big dress of tree footpath is not gone again, and so, the trunk also is not the perfect circle, and the arc track that sets up in advance can not encircle along with the tree form laminating.
(4) The cutting depth of the knife cannot be adjusted in real time with the appearance of the tree during cutting. Because the shape of the tree is uncertain, the tree is convex sometimes and concave sometimes, the constant cutting depth is preset according to the dial, in reality, if the tree meets the concave place, the knife of the device cannot cut the bark, and on the contrary, if the tree meets the convex place, the knife can cut deeply and hurt the tree.
(5) In the process of making circular motion around the tree, step motor can only control the top dolly and remove, and can't control the driven dolly on the guide rail of below and remove, and it may not be very obvious to influence at no-load in-process, but when the cutting process, middle cutter can bring the resistance for the complete machine removes, will appear the phenomenon that the slider on the upper and lower guide rail is asynchronous this moment, and this phenomenon can lead to the equipment can't normally work at all, directly destroys equipment even.
The chinese patent application CN106718653A discloses a tapping machine, comprising a rail, a traveling mechanism and a cutter, wherein the rail is arranged parallel to a tapping line; the traveling mechanism is arranged on the track and can move in the plane for cutting the rubber barks along the track; the cutting knife is arranged on the travelling mechanism; when using, it is fixed to correspond the suitable position installation of rubber trunk secant with the track to adjust the distance between track and the trunk, make the cutting knife be located the tapping line top and make it contradict on the trunk, drive the cutting knife through running gear and carry out the tapping along orbital motion. The rubber tapping machine has the following problems:
(1) the self-rotation of the screw rod drives the sliding block on the screw rod to move downwards, but the sliding block on the polished rod on the other side of the rail cannot be ensured to move downwards by the same distance through the flat and long rail, so that the uniform thickness of the bark cut by each knife cannot be ensured.
(2) In the process of returning to the initial position after cutting, a knife retracting mechanism does not retract the knife, and the knife always butts against the glue line which is just cut, so that glue flowing is influenced.
(3) The adoption of spiral downward cutting with a single-side blade or reciprocating cutting with double-side blades can affect the downward flowing of the glue along the cutting opening.
(4) The guide rail has a twist after spirally winding, the included angle of the flat guide surface relative to the horizontal plane has deviation, the consistency of the cutting direction of the cutter on the guide rail can be influenced, and the angle of the tangent plane relative to the horizontal plane is unstable.
(5) The strength of deformation resistance of the flat and long guide rail is not enough, the guide rail can shake and deform in the running process of the walking mechanism, and the cutting track of each time is different due to the deformation of the guide rail.
(6) The knife is rigidly connected to the travelling mechanism, and the knife cannot rotate relatively along the secant direction, namely, the knife has no structure similar to a wrist, so that the knife cannot be automatically adjusted on different tree surfaces to enable the knife head to always impact the tree center, and the cutting depth cannot be kept consistent all the time.
(7) The limiting rod is only contacted with the trunk at one point, the guiding and limiting are not enough, and the knife is extremely easy to be blocked on a pit or a small tree tumor on the trunk.
Therefore, the tapping machine disclosed in the patent application has difficulty in achieving uniformity and smoothness of the cutting depth, the cutting thickness and the cutting trajectory.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that an it replaces artificial rubber tapping machine with automatic machine is provided.
In order to solve the technical problems, the invention adopts the following technical scheme:
a rubber tapping machine comprises two supporting steel pipes, wherein one sides of the two supporting steel pipes are connected through a binding band, the other sides of the two supporting steel pipes are connected through an upper spiral guide rail and a lower spiral guide rail, and the spiral guide rails are opposite to the binding bands on the opposite sides of the spiral guide rails; the tapping machine also comprises a tapping machine component, the tapping machine component comprises a slide block penetrating through the screw rod and the fixed rod, and a swing arm seat is fixedly connected with the slide block, one side of the tool bit swing arm is hinged with the swing arm seat through a torsion spring, the other side of the tool bit swing arm is hinged with the swing seat, a tool bit assembly is installed on the swing seat, and a tool retracting assembly capable of overcoming the elasticity of the torsion spring to pull the tool bit swing arm to the sliding block is further installed on the sliding block.
Further, the binding band is connected with the supporting steel pipe through a binding band buckle.
Furthermore, the cross section of the spiral guide rail is approximately L-shaped.
Furthermore, a small bulge used for being clamped in the groove of the spiral guide rail is arranged on the main machine shell.
Furthermore, more than two groups of guide roller shafts and guide rollers are arranged in the main machine shell.
Furthermore, tooth-shaped fine teeth which can be meshed with each other are respectively arranged on the spiral guide rail, the power wheel rolling along the spiral guide rail and the guide roller.
Furthermore, a switch baffle is arranged between the two spiral guide rails and in the direction parallel to the supporting steel pipe.
Further, the tool bit subassembly is including installing the dark seat of adjusting of sword on the swing seat, adjusts and installs dark locating part of sword and tool bit on the seat.
Furthermore, the knife retracting component comprises a knife retracting motor and a knife retracting wheel driven by the knife retracting motor, and the knife retracting motor pulls the knife head swing arm to move towards the sliding block through a wire drawing.
Furthermore, the swing seat is hinged with the cutter head swing arm through two cutter head clamping pieces.
A tapping method comprises the following steps:
(1) sleeving a spiral guide rail of a rubber tapping machine on a rubber tree trunk, and tensioning a binding band to fix the rubber tapping machine on the rubber tree;
(2) rotating the swing seat, adjusting the cutter head to a proper cutting angle and depth, loosening the drawn wires by a cutter retracting motor, extending the cutter head swing arm under the action of the elasticity of a torsion spring, so that the cutter head cuts into the rubber barks, and tightly abutting against the rubber barks by a cutter depth limiting piece;
(3) a motor on the tool rest assembly is started to drive a power wheel to rotate in the forward direction, so that the tool rest assembly synchronously rotates clockwise along the upper spiral guide rail and the lower spiral guide rail and simultaneously cuts a tool bit, a tool lowering roller on the lead screw rolls clockwise when passing through a boss on the lower spiral guide rail, and the lead screw does not rotate;
(4) the knife rest assembly moves clockwise until the limit switch touches the switch baffle plate, the motor stops, the knife retracting motor pulls the wire drawing to pull the knife head swing arm back, and the knife head and the knife depth limiting piece are separated from the rubber bark;
(5) starting a motor on the tool rest assembly, driving a power wheel to rotate reversely, enabling the tool rest assembly to synchronously rotate anticlockwise along the upper spiral guide rail and the lower spiral guide rail, and starting resetting;
(6) when the knife lowering roller on the screw rod passes through the boss on the lower spiral guide rail, the screw rod is driven to rotate under the action of the one-way bearing, so that the rubber tapping knife assembly moves downwards along with the screw rod to a position lower than the initial rubber tapping position in the step (3), and the motor stops when the knife rest assembly moves anticlockwise until the limit switch touches the switch baffle;
(7) and (5) repeating the steps (3) - (6) until the whole tapping process is finished.
The utility model has the advantages that:
the utility model discloses a tapping machine to automatic machinery replaces artifically, has realized the unmanned automatic tapping of rubber tree, and it is big that artifical tapping intensity of labour has been solved to the at utmost to and artifical tapping is not enough fine and more meticulous problem.
The utility model discloses a tapping machine chooses the fixed method of bandage and spiral track combination for use, and through tightening up the radius length that the bandage brought according to the thickness shape adjustment helical guideway of rubber trunk, make helical guideway follow the tree form as far as and tightly encircle the rubber bark, not only can make the very firm fixing of tapping machine on the trunk, still dwindle the arm of force between tapping knife tackle spare and the rubber trunk, can practice thrift the tapping machine energy consumption and improve its tapping effect.
The utility model discloses a rubber tapping machine, through with limit switch setting in the slider both sides, touch switch baffle comes the control motor to close when removing along with the knife rest assembly, and is simple and easy.
The utility model discloses a rubber tapping machine, one side of tool bit swing arm is passed through the torsional spring and is articulated mutually with the slider, and the opposite side is articulated mutually with the swing seat, and the seat is adjusted deeply to the sword that the installation can adjust tool bit depth of cut on the swing seat, installs the dark locating part of sword and tool bit on this regulation seat, still installs on the slider and can overcome torsional spring elasticity and draw the receipts knife tackle spare to the slider to the tool bit swing arm. The structure design can make the cutter head swing arm deflect to the rubber bark as far as possible under the action of the elastic force of the torsion spring after the cutter retracting assembly loosens the cutter head swing arm, the swing seat is hinged with the cutter head swing arm, namely the swing seat can swing around the cutter head swing arm, so that the cutter depth limiting part can fluctuate along with fluctuation of the surface of the rubber bark in the rubber tapping process and always abut against the surface of the rubber bark, and the position between the cutter head and the cutter depth limiting part is fixed, thereby ensuring that the cutter head always keeps cutting basically vertical to the surface of the rubber bark, not only realizing continuous cutting of the surface of irregular rubber bark, but also ensuring the cutting quality.
The rubber tapping machine disclosed by the utility model can set the spiral tracks with corresponding curves according to the cutting requirements of different rubber tree varieties, and the power wheel on the knife rest assembly can be tightly attached to the spiral guide rail to roll through the limit of the small bulge and the guide roller on the main case, thereby ensuring the cutting continuity; compared with the method that the cutter frame assembly moves along the circumferential direction of the rubber trunk and the tapping cutter assembly moves up and down along the screw rod to perform vector superposition cutting, the tapping machine disclosed by the invention is simpler and more convenient, the cost is reduced, and compared with tapping machine equipment (such as the tapping machine disclosed in CN 106718653A) which is only provided with one walking mechanism spiral track in the prior art, the stability is greatly improved.
The utility model discloses a tapping machine, through utilizing the operating principle of the one-way bearing, when the knife rest assembly rotates clockwise along the spiral guide rail to cut, the lead screw does not rotate; when the knife rest assembly rotates along the spiral guide rail anticlockwise, the cutter descending roller rolls to drive the screw rod to rotate, so that the rubber cutter component moves downwards in the resetting process, and the cutting of the next stroke is facilitated.
Drawings
Fig. 1 is a schematic structural view of a tapping machine disclosed in embodiment 1 of the present invention;
FIG. 2 is an exploded view of the parts of the tapping machine disclosed in embodiment 1 of the present invention;
fig. 3 is a schematic view of a partial structure of a cutter frame assembly of the tapping machine disclosed in embodiment 1 of the present invention;
fig. 4 is a schematic structural view of a tapping knife assembly disclosed in embodiment 1 of the present invention;
fig. 5 is a schematic view of the rubber tapping machine disclosed in embodiment 1 of the present invention installed on a rubber tree.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Embodiment 1, as shown in fig. 1 to 5, this embodiment discloses a tapping machine, which includes two support steel pipes 1, one side of each support steel pipe 1 is connected with each other through a binding band 2, the other side is connected with each other through an upper spiral guide rail and a lower spiral guide rail 3, the spiral guide rails are opposite to the binding bands on the opposite sides, and the spiral guide rails 3 may be made of rubber and have a cross section of a nearly L shape; the tapping machine in the embodiment also comprises a tool rest assembly with a motor 8, wherein the upper end and the lower end of a power steel shaft 4 of the tool rest assembly are respectively provided with a power wheel 5 capable of rolling along a spiral guide rail, in addition, the tool rest assembly is also provided with a lead screw 6 and more than one fixing rods 7 along the vertical direction, the power wheels 5 are driven to rotate by the motor 8 arranged on the tool rest assembly, the lower end of the lead screw 6 is provided with a cutter reducing roller 9 through a one-way bearing, the lower spiral guide rail is provided with a section of boss 10 which is matched with the cutter reducing roller 9 for rolling friction, and the lead screw 6 does not rotate when the tool rest assembly rotates clockwise along the spiral guide rail 3 for cutting by utilizing the working principle of the one-way bearing; when the knife rest assembly rotates anticlockwise along the spiral guide rail 3 to reset, the cutter descending roller 9 and the boss 10 are in contact rolling to drive the screw rod 6 to rotate, so that the rubber tapping knife assembly moves downwards to cut in the next stroke. The upper end and the lower end of a tool rest assembly penetrate through a screw rod 6 and a fixed rod 7 to be respectively provided with a main machine shell 11, the main machine shell 11 is clamped in a groove of a spiral guide rail 3 through a small bulge 25, each main machine shell 11 is internally provided with more than two guide roller shafts 12, the guide roller shafts 12 are provided with guide rollers 13, the upper main machine shell and the lower main machine shell are respectively provided with two guide rollers which are distributed at two sides of a power wheel to play a role in guiding and positioning the power wheel, the rubber tapping machine also comprises a rubber tapping cutter assembly, the rubber tapping cutter assembly comprises a sliding block 14 penetrating through the screw rod 6 and the fixed rod 7, a swinging arm seat 15 is fixedly connected with the sliding block 14, one side of a cutter head swinging arm 16 is hinged with the swinging arm seat 15 through a torsion spring, the other side of the cutter head swinging arm 16 is hinged with a swinging seat 17 through two cutter head clamping sheets 24, the swinging seat 17 can swing around the cutter head swinging arm 16, the adjusting seat 19 is provided with a cutter depth limiting part 20 and a cutter head 21; the sliding block 14 is also provided with a knife retracting component which can overcome the elasticity of the torsional spring and pull the swing arm of the tool bit to the sliding block, the knife retracting component comprises a knife retracting motor 22 and a knife retracting wheel 23 driven by the knife retracting motor, and the knife retracting motor pulls the swing arm of the tool bit to move to the sliding block through a wire drawing; two switch baffles 26 are arranged between the two spiral guide rails and in the direction parallel to the supporting steel pipe, limit switches 18 are respectively arranged on the sliding block 14 and the knife depth limiting part 20, when the knife rest assembly rotates clockwise along the spiral guide rails, the limit switches on the knife depth limiting part touch the switch baffles, then the motor 8 stops working, and when the knife rest assembly rotates anticlockwise along the spiral guide rails, the limit switches on the sliding block touch the switch baffles, then the motor 8 stops working.
Alternatively, in the present embodiment, the band 2 is connected to the support steel pipe 1 by a band buckle 27.
Alternatively, in this embodiment, the spiral guide rail, the power wheel and the guide roller rolling along the spiral guide rail are respectively provided with tooth-shaped fine teeth which can be meshed with each other.
The embodiment also discloses a tapping method, which is used for tapping by using the tapping machine and comprises the following steps:
(1) sleeving a spiral guide rail of a rubber tapping machine on a rubber tree trunk, and tensioning a binding band to fix the rubber tapping machine on the rubber tree;
(2) rotating the swing seat, adjusting the cutter head to a proper cutting angle and depth, loosening the drawn wires by a cutter retracting motor, extending the cutter head swing arm under the action of the elasticity of a torsion spring, so that the cutter head cuts into the rubber barks, and tightly abutting against the rubber barks by a cutter depth limiting piece;
(3) a motor on the tool rest assembly is started to drive a power wheel to rotate in the forward direction, so that the tool rest assembly synchronously rotates clockwise along the upper spiral guide rail and the lower spiral guide rail and simultaneously cuts a tool bit, a tool lowering roller on the lead screw rolls clockwise when passing through a boss on the lower spiral guide rail, and the lead screw does not rotate;
(4) the knife rest assembly moves clockwise until the limit switch touches the switch baffle plate, the motor stops, the knife retracting motor pulls the wire drawing to pull the knife head swing arm back, and the knife head and the knife depth limiting piece are separated from the rubber bark;
(5) starting a motor on the tool rest assembly, driving a power wheel to rotate reversely, enabling the tool rest assembly to synchronously rotate anticlockwise along the upper spiral guide rail and the lower spiral guide rail, and starting resetting;
(6) when the knife lowering roller on the screw rod passes through the boss on the lower spiral guide rail, the screw rod is driven to rotate under the action of the one-way bearing, so that the rubber tapping knife assembly moves downwards along with the screw rod to a position lower than the initial rubber tapping position in the step (3), and the motor stops when the knife rest assembly moves anticlockwise until the limit switch touches the switch baffle;
(7) and (5) repeating the steps (3) - (6) until the whole tapping process is finished.

Claims (10)

1. The utility model provides a tapping machine which characterized in that: the rubber tapping machine comprises two supporting steel pipes, one side of each supporting steel pipe is connected through a binding band, the other side of each supporting steel pipe is connected through an upper spiral guide rail and a lower spiral guide rail, and the spiral guide rails are opposite to the binding bands on the opposite sides of the spiral guide rails; the tapping machine also comprises a tapping machine component, the tapping machine component comprises a slide block penetrating through the screw rod and the fixed rod, and a swing arm seat is fixedly connected with the slide block, one side of the tool bit swing arm is hinged with the swing arm seat through a torsion spring, the other side of the tool bit swing arm is hinged with the swing seat, a tool bit assembly is installed on the swing seat, and a tool retracting assembly capable of overcoming the elasticity of the torsion spring to pull the tool bit swing arm to the sliding block is further installed on the sliding block.
2. The tapping machine as claimed in claim 1, wherein: the bandage is connected with the support steel pipe through a bandage buckle.
3. The tapping machine as claimed in claim 1, wherein: the cross section of the spiral guide rail is nearly L-shaped.
4. The tapping machine as claimed in claim 1, wherein: the main machine shell is provided with a small bulge which is used for being clamped in the groove of the spiral guide rail.
5. The tapping machine as claimed in claim 1, wherein: more than two groups of guide roller shafts and guide rollers are arranged in the main machine shell.
6. The tapping machine as claimed in claim 1, wherein: the spiral guide rail, the power wheel rolling along the spiral guide rail and the guide roller are respectively provided with tooth-shaped fine teeth which can be meshed with each other.
7. The tapping machine as claimed in claim 1, wherein: and a switch baffle is arranged between the two spiral guide rails and in the direction parallel to the supporting steel pipe.
8. The tapping machine as claimed in claim 1, wherein: the tool bit subassembly is including installing the dark seat of adjusting of sword on the swing seat, adjusts and installs dark locating part of sword and tool bit on the seat.
9. The tapping machine as claimed in claim 1, wherein: the knife retracting component is a knife retracting motor and a knife retracting wheel driven by the knife retracting motor, and the knife retracting motor pulls the knife head swing arm to move towards the sliding block through a wire drawing.
10. The tapping machine as claimed in claim 1, wherein: the swing seat is hinged with the tool bit swing arm through two tool bit clamping pieces.
CN201920734937.XU 2019-05-21 2019-05-21 Rubber tapping machine Active CN210610542U (en)

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Application Number Priority Date Filing Date Title
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111972250A (en) * 2019-05-21 2020-11-24 宁波中创瀚维科技有限公司 Rubber tapping machine and rubber tapping method
CN113016561A (en) * 2021-01-06 2021-06-25 海南大学 Automatic clamping and centering tapping machine for different-direction crank
CN113303197A (en) * 2021-06-16 2021-08-27 海南大学 Copying track rubber tapping device
CN114303872A (en) * 2021-12-03 2022-04-12 周建雄 Agriculture and forestry are with supplementary collection device of natural raw lacquer

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111972250A (en) * 2019-05-21 2020-11-24 宁波中创瀚维科技有限公司 Rubber tapping machine and rubber tapping method
CN113016561A (en) * 2021-01-06 2021-06-25 海南大学 Automatic clamping and centering tapping machine for different-direction crank
CN113016561B (en) * 2021-01-06 2024-05-24 海南大学 Automatic clamping centering rubber tapping machine for anisotropic crank
CN113303197A (en) * 2021-06-16 2021-08-27 海南大学 Copying track rubber tapping device
CN114303872A (en) * 2021-12-03 2022-04-12 周建雄 Agriculture and forestry are with supplementary collection device of natural raw lacquer

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