Portable electric rubber tapping machine

Abstract

The utility model provides a portable electric rubber tapping machine which comprises a movable part, the movable part is used for installing a cutter, the movable part comprises a transmission piece and further comprises a driving part, the driving part can apply driving force to the movable part, the driving part comprises a rotatable cam, and the cam can rotate around the transmission piece. At least two inclined surfaces are uniformly distributed on the cam in the circumferential direction of the end surface of the cam, and when the cam rotates, the inclined surfaces are in rolling contact with the transmission part and push the transmission part to move in the direction away from the cam; according to the scheme, the motor is matched with the cam, when the cam rotates, the inclined planes push the transmission part, the inclined planes are evenly distributed, the transmission part is provided with two stress parts corresponding to the inclined planes, and the stress parts are in rolling contact with the stress parts, so that the thrust of the inclined planes to the transmission block can be converged towards the axis of the movable rod; therefore, driving force for pushing the movable rod to be inserted into bark is synthesized, and transmission efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of electric tool structure design, in particular to a portable electric rubber tapping machine. Background Art

[0002] Rubber tapping machines are widely used as power tools in the natural rubber collection process. When in use, workers hold the tapping machines and cut the bark with the cutter. Therefore, a mechanical structure needs to be set inside the tapping machine to drive the cutter to perform linear translation. Traditional tapping machines generally use a motor and an eccentric wheel structure to achieve linear translation of the cutter. This type of mechanical structure is complex and has low transmission efficiency. Utility Model Content

[0003] The purpose of the utility model is to provide a portable electric rubber tapping machine to solve the technical problems of the existing rubber tapping machine in that the internal mechanical structure is complex and the transmission efficiency is low.

[0004] To achieve the above object, the utility model provides a portable electric rubber tapping machine, comprising:

[0005] case,

[0006] The movable part is movably arranged in the shell, and the first end of the movable part extends out of the shell. The movable part is used to install the tool, and the movable part includes a transmission member.

[0007] A driving part is provided in the housing, and applies a driving force to the movable part. The driving part includes a rotatable cam, and the end surface of the cam is evenly provided with at least two inclined surfaces in the circumferential direction.

[0008] When the cam rotates, the inclined surfaces respectively come into rolling contact with the transmission member to push the transmission member to move away from the driving portion.

[0009] The present invention designs a portable electric rubber tapping machine, which adopts a motor and a cam. When the cam rotates, the inclined surface pushes the corresponding transmission member. Since the inclined surfaces are evenly distributed and there are no less than two of them, there are two force-bearing parts corresponding to the inclined surfaces on the transmission member, and the two are in rolling contact. Therefore, the thrust of the inclined surface on the transmission member will converge toward the axis of the movable rod, thereby synthesizing a driving force that pushes the movable rod to insert into the bark, thereby improving the transmission efficiency.

[0010] Furthermore, the end surface of the cam includes a base surface, the inclined surface is arranged on the base surface, the end of the inclined surface is connected to the base surface, and along the axial direction of the cam, the height of the inclined surface is gradually increased from the end.

[0011] Furthermore, the transmission member includes a first transmission block and a second transmission block, the inclined surface includes a first inclined surface and a second inclined surface, and when the cam rotates, the first inclined surface pushes the first transmission block, and the second inclined surface pushes the second transmission block.

[0012] Furthermore, the movable part also includes a movable rod, a first end of the movable rod is provided with a tool holder, the tool holder is used to install a tool, the second end of the movable rod is provided with a fixing pin, the first transmission block and the second transmission block are both rings and are respectively sleeved on the first end and the second end of the fixing pin, and needle bearings are provided between the first transmission block and the fixing pin, and between the second transmission block and the fixing pin; the ring contacts the convex surface, and rolling contact is used instead of sliding contact to reduce friction and reduce wear. At the same time, a needle bearing is provided between the ring and the fixing pin, so that the ring can also rotate, thereby achieving the effect of rolling contact between the inner and outer contact parts.

[0013] Furthermore, there is at least one first inclined surface, and at least one second inclined surface, and the number of the first inclined surfaces is equal to the number of the second inclined surfaces.

[0014] Furthermore, a groove is formed on the surface of the inclined surface, and a rolling body is provided in the groove and protrudes from the surface of the inclined surface. When the cam rotates, the rolling body is in rolling contact with the transmission member.

[0015] Furthermore, the cam includes a first cam, the transmission member includes a second cam, the first cam and the second cam are arranged in mirror symmetry, and rolling bodies are provided on the inclined surface of the first cam and / or the inclined surface of the second cam.

[0016] Furthermore, the driving unit includes a driving motor and a rotating shaft.

[0017] The cam is located at the first end of the rotating shaft, and the cam and the rotating shaft are an integral structure.

[0018] The output end of the driving motor is connected to the second end of the rotating shaft.

[0019] Furthermore, the cam is connected to a support structure, and the support structure includes a thrust bearing, a ball and a ring sleeve, wherein: the cam is connected to the ring sleeve and the two rotate synchronously, a ball is provided between the ring sleeve and the thrust bearing, and the thrust bearing is fixedly installed in the housing; a thrust bearing is used to unload force on the rear side of the cam rotating shaft, and when the second end transmission part of the movable rod contacts the cam shaft, the rotating shaft directly transmits the force to the thrust bearing through the back side of the cam, and the thrust bearing transmits the force to the housing, so as to achieve smooth operation of the equipment and increase service life and reliability.

[0020] Furthermore, a port is provided on the shell, a sleeve is fixedly provided in the shell, the movable rod extends into and passes through the sleeve, and the second end of the movable rod extends out of the port;

[0021] It also includes: a first limit block fixedly arranged at the first end of the sleeve, a second limit block fixedly arranged at the second end of the sleeve, and a spring arranged between the first limit block and the second limit block. The spring is sleeved on the movable rod, and the two ends of the spring are respectively abutted against the first limit block and the second limit block. The spring can push the movable rod to translate toward the direction close to the cam.

[0022] Furthermore, the portable electric rubber tapping machine also includes:

[0023] A first guide block is fixedly arranged in the housing, and a first groove track is provided on the first guide block, which is parallel to the translation track of the movable rod.

[0024] A second guide block is fixedly arranged in the housing, and a second groove track is provided on the second guide block, which is parallel to the translation track of the movable rod.

[0025] The first end of the fixing pin is inserted into the first groove rail, and the second end of the fixing pin is inserted into the second groove rail.

[0026] The driving unit further includes a speed reducer, and an output shaft of the speed reducer is coaxially connected to the rotating shaft.

[0027] The output shaft of the reducer is provided with a flat key at the end close to the rotating shaft, and the end of the rotating shaft close to the output shaft is provided with a key slot, and the flat key is inserted into the key slot.

[0028] The advantages of the present invention are as follows: the portable electric rubber tapping machine designed by the present invention adopts a motor in combination with a cam, and when the cam rotates, the inclined surface pushes the corresponding transmission member on the movable part. Since there is rolling contact between the inclined surface and the transmission member and there are at least two inclined surfaces, the thrust of the convex surface on the transmission member will converge toward the axis of the movable rod, thereby synthesizing a driving force that pushes the movable rod to insert into the bark. Compared with the traditional motor combined with the eccentric wheel structure, the linear translation transmission efficiency of the tool is higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0030] Figure 1The figure is an overall structural diagram of a rubber tapping machine in one embodiment of the present invention.

[0031] Figure 2 Schematic diagram of the force acting on the movable rod in one embodiment of the present invention.

[0032] Figure 3 A partial schematic diagram of the internal structure of a rubber tapping machine in one embodiment of the present invention.

[0033] Figure 4 This is a schematic diagram of the cam structure in one embodiment of the present utility model.

[0034] Figure 5 Schematic diagram of the inclined surface structure of the cam end face in one embodiment of the present invention.

[0035] The components in the figure are represented as follows: 1. Movable rod; 2. Tool holder; 3. Rotating shaft; 4. Transmission member; 41. First transmission block; 42. Second transmission block; 5. Cam; 51. First inclined plane; 52. Second inclined plane; 6. Housing; 8. First limit block; 9. Second limit block; 10. Spring; 11. First guide block; 12. First groove rail; 13. Second guide block; 14. Second groove rail; 15. Fixing pin; 16. Motor; 17. Reducer; 18. Flat key; 19. Keyway; 20. Thrust bearing; 21. Ball; 22. Ring sleeve; 23. Base surface. DETAILED DESCRIPTION

[0036] The following describes preferred embodiments of the present invention with reference to the accompanying drawings to demonstrate that the present invention can be implemented. These embodiments can fully introduce the present invention to those skilled in the art, making the technical content clearer and easier to understand. The present invention can be embodied in many different forms of embodiments, and the scope of protection of the present invention is not limited to the embodiments described herein.

[0037] In the drawings, components with identical structures are denoted by the same reference numerals, and mechanisms with similar structures or functions are denoted by similar reference numerals. The dimensions and thicknesses of each component shown in the drawings are arbitrary and are not limited by the present invention. For clarity, the thicknesses of components in some places in the drawings are exaggerated.

[0038] In addition, the following descriptions of the various embodiments of the present invention are made with reference to the accompanying drawings to illustrate specific embodiments of the present invention that may be implemented. Directional terms mentioned in the present invention, such as "upper," "lower," "front," "back," "left," "right," "inner," "outer," and "side," are merely referenced to the directions of the accompanying drawings. Therefore, the directional terms used are intended to better and more clearly illustrate and understand the present invention, and are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first," "second," and "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0039] When some components are described as being "on" another component, the component may be directly placed on the other component; there may also be an intermediate component with the component placed on the intermediate component, and the intermediate component placed on the other component. When a component is described as being "mounted to" or "connected to" another component, the two can be understood to be directly "mounted" or "connected" or indirectly "mounted to" or "connected to" the other component through an intermediate component.

[0040] Example:

[0041] This embodiment provides a portable electric rubber tapping machine, which includes a movable part and a transmission part. Figure 1 As shown,

[0042] The shell 6 is cylindrical in shape and has a gripping portion on the outside.

[0043] The housing 6 is provided with a movable portion, which includes a movable rod 1, the front end of which can extend out of the housing, and a knife seat 2 is installed at the front end of the movable rod 1. The knife seat 2 is used to install a knife.

[0044] A transmission member 4 is provided at the rear end of the movable rod 1. The transmission member 4 includes two first transmission blocks 41 and a second transmission block 42 symmetrically arranged along the center of the movable rod.

[0045] The driving part includes a driving motor 16 and a rotating shaft 3. The driving motor 16 rotates to drive the rotating shaft 3. The front end of the rotating shaft 3 is a cam 5. The cam 5 and the rotating shaft 3 are an integrated structure.

[0046] When the driving motor 16 is powered on and rotates, driving the rotating shaft 3 to rotate, the cam 5 rotates. At this time, if the movable rod 1 moves backward under the action of an external force, the transmission member 4 approaches the cam 5, the first inclined surface 51 pushes the first transmission block 41, and the second inclined surface 52 pushes the second transmission block 42, so that the movable rod 1 is pushed forward;

[0047] like Figure 5 As shown, a base surface 23 is provided on the end face of the set cam 5, and the base surface 23 is the reference surface (the lowest point). The inclined surface is set on the reference surface, and one end of the inclined surface is connected to the base surface 23. In the axial direction of the cam, the height of the inclined surface gradually increases from the end portion connected to the reference surface. In this way, when the cam 5 rotates, the inclined surface on the cam 5 contacts the transmission block on the movable rod. The inclined surface can push the transmission block and apply an oblique thrust to the transmission block, and multiple oblique forces will converge at the center of the movable rod to form a driving force that pushes the movable rod forward.

[0048] like Figure 2 As shown, the thrust of the convex surface on the transmission block will converge toward the axis of the movable rod 1, thereby synthesizing a driving force to push the movable rod 1 into the bark. Compared with the traditional motor 16 combined with the eccentric wheel structure to achieve linear translation transmission of the tool, it is more efficient.

[0049] During actual use, the worker presses the tool against the surface of the bark. The pressure generated by the bark surface can make the movable rod 1 move backward, so that the transmission block at the rear end of the movable end moves backward and sticks to the surface of the cam 5, and then the rotating shaft 3 starts to rotate. When the rotating shaft 3 drives the cam 5 to rotate, the inclined surface of the cam 5 surface contacts the transmission block and can push the transmission block forward, so that the transmission block pushes the movable rod 1 forward, and the tool on the tool holder 2 at the front end of the movable rod 1 can be inserted forward into the bark to cut the bark.

[0050] In some embodiments, as Figure 3 As shown, a fixed pin is provided at the rear end of the movable rod, and the first transmission block and the second transmission block are both circular rings and are respectively sleeved on the upper and lower ends of the fixed pin, and a needle bearing is provided between the two transmission blocks and the fixed pin; the circular ring contacts the inclined surface, and rolling contact is adopted instead of sliding contact to reduce friction and reduce wear. At the same time, a needle bearing is provided between the circular ring and the fixed pin 15, so that the circular ring can also rotate, thereby achieving the effect of rolling contact between the inner and outer contact parts.

[0051] In some embodiments, there is at least one first inclined surface 51 and at least one second inclined surface 52 , and the number of the first inclined surfaces 51 and the number of the second inclined surfaces 52 are equal;

[0052] On the end surface of the cam 5 , one first inclined surface 51 corresponding to one second inclined surface 52 , two first inclined surfaces 51 corresponding to two second inclined surfaces 52 , or three first inclined surfaces 51 corresponding to three second inclined surfaces 52 .

[0053] When only one first inclined surface 51 is provided corresponding to one second inclined surface 52 , one rotation of the cam 5 allows the movable rod 1 to drive the tool forward once;

[0054] When two first inclined surfaces 51 and two second inclined surfaces 52 are set in one-to-one correspondence, one rotation of the cam 5 can allow the movable rod 1 to drive the tool forward twice. Similarly, the more convex surfaces are set, the higher the frequency of the movable rod 1 driving the tool forward when the cam 5 rotates, which depends on actual needs.

[0055] In some embodiments, a groove is provided on the surface of the inclined surface, and a rolling body protruding from the inclined surface is provided in the groove. When the cam rotates, the rolling body rolls in contact with the transmission member. The rolling body on the inclined surface can be in contact with the transmission member to form rolling contact between the two.

[0056] In some embodiments, the cam includes a first cam, the transmission member includes a second cam, and the first cam and the second cam are arranged in mirror symmetry;

[0057] The transmission member can adopt a second cam that is mirror-symmetrical to the first cam. Rolling bodies can be set on the inclined surfaces of the two cams to form rolling contact between the two. The rolling body can be set on only one of the cams or on both cams.

[0058] It should be noted that the transmission member can adopt a second cam that is mirror-symmetrical to the first cam, and no rolling elements are set on the two cams. Although the rolling friction between the two is changed to sliding friction, the effect of this solution can also be achieved.

[0059] In some embodiments, as Figure 3 As shown, the portable electric rubber tapping machine also includes a housing 6, a cam 5 connected to a support structure, and the support structure includes a thrust bearing 20, a ball 21 and a ring sleeve 22, wherein:

[0060] The cam 5 is connected to the ring sleeve 22 and the two rotate synchronously. A ball 21 is provided between the ring sleeve 22 and the thrust bearing 20 . The thrust bearing 20 is fixedly installed in the housing 6 .

[0061] The thrust bearing 20 is used to unload the force on the rear side of the rotating shaft 3 of the cam 5. When the second end transmission part 4 of the movable rod 1 contacts the cam 5 shaft, the rotating shaft 3 directly transmits the force to the thrust bearing 20 through the back of the cam 5, and the thrust bearing 20 transmits the force to the housing 6, so as to achieve smooth operation of the equipment and increase the service life and reliability.

[0062] In some embodiments, as Figure 3 As shown, a port is opened on the shell 6, a sleeve is fixedly set in the shell 6, the movable rod 1 extends into and passes through the sleeve, and the second end of the movable rod 1 extends out of the port;

[0063] The movable rod 1 moves back and forth in the sleeve, and the sleeve guides the movable rod 1 to prevent the movable rod 1 from swinging when it moves horizontally in the housing 6.

[0064] In some embodiments, as Figure 3 As shown, the portable electric rubber tapping machine also includes:

[0065] A first limiting block 8 is fixedly arranged at the first end of the sleeve.

[0066] The second limiting block 9 is fixedly arranged at the second end of the sleeve.

[0067] A spring 10 is provided between the first limit block 8 and the second limit block 9. The spring 10 is sleeved on the movable rod 1, and the two ends of the spring 10 are respectively against the first limit block 8 and the second limit block 9. The spring 10 can push the movable rod 1 to translate toward the direction close to the cam 5;

[0068] The spring 10 can play a buffering role. When the convex surface on the cam 5 pushes the movable rod 1 to move forward, the spring 10 located between the first limit block 8 and the second limit block 9 will be compressed. The elastic force generated by the compressed spring 10 can play a buffering role on the movable rod 1. At the same time, the elastic force of the spring 10 can also assist the movable rod 1 when the convex surface separates from the limit block, so that the limit block moves backward and sticks to the surface of the cam 5 again (in this process, the force generated by the worker holding the rubber tapping machine against the bark can make the movable rod 1 move backward with the limit block and stick to the surface of the cam 5).

[0069] In some embodiments, as Figure 3 As shown, the portable electric rubber tapping machine also includes:

[0070] A first guide block 11 is fixedly arranged in the housing 6, and a first groove track 12 is provided on the first guide block 11, which is parallel to the translation track of the movable rod 1.

[0071] A second guide block 13 is fixedly arranged in the housing 6, and a second groove track 14 is provided on the second guide block 13, which is parallel to the translation track of the movable rod 1.

[0072] A guide post is fixedly provided at the rear end of the movable rod 1. The guide post passes through the first transmission block 41, the movable rod 1, and the second transmission block 42. The upper end of the guide post is inserted into the first groove rail 12, and the lower end of the guide post is inserted into the second groove rail 14.

[0073] The guide column cooperates with the upper and lower groove rails to guide the translation of the movable rod 1 and the transmission block, thereby ensuring that the movable rod 1 drives the tool to translate linearly.

[0074] In some embodiments, as Figure 3As shown, the driving part includes a reducer 17, and the output shaft of the reducer 17 is coaxially connected to the rotating shaft 3; since the rubber tapping machine is driven by a high-speed motor 16, a reducer 17 is provided at the driving part of the high-speed motor 16, which can effectively reduce the noise and vibration generated by the rubber tapping machine when in use.

[0075] In some embodiments, as Figure 3 and Figure 4 As shown, a flat key 18 is provided at the end of the output shaft of the reducer 17 close to the rotating shaft 3, and a key slot 19 is provided at the end of the rotating shaft 3 close to the output shaft, and the flat key 18 is inserted into the key slot 19; the connection part between the output end of the reducer 17 and the rotating shaft 3 adopts a flat key 18 structure, which can effectively realize the synchronous rotation of the drive motor 16 and the rotating shaft 3.

[0076] Although the present invention is described herein with reference to specific embodiments, it should be understood that these embodiments are merely illustrative of the principles and applications of the present invention. It should be understood that many modifications may be made to the illustrative embodiments, and that other arrangements may be devised, without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that the various dependent claims and features described herein may be combined in ways other than those described in the original claims. It should also be understood that features described in conjunction with individual embodiments may be employed in conjunction with other described embodiments.

Claims

1. A portable electric rubber tapping machine, characterized in that: include: case, The movable part is movably arranged in the shell, and the first end of the movable part extends out of the shell. The movable part is used to install the tool, and the movable part includes a transmission member. A driving part is provided in the housing, and applies a driving force to the movable part. The driving part includes a rotatable cam, and the end surface of the cam is evenly provided with at least two inclined surfaces in the circumferential direction. When the cam rotates, the inclined surfaces respectively come into rolling contact with the transmission member to push the transmission member to move away from the driving portion.

2. The portable electric rubber tapping machine according to claim 1, wherein The end surface of the cam includes a base surface, the inclined surface is arranged on the base surface, the end of the inclined surface is connected to the base surface, and along the axis direction of the cam, the height of the inclined surface is gradually increased from the end.

3. The portable electric rubber tapping machine according to claim 1, wherein The transmission member includes a first transmission block and a second transmission block, The inclined surface includes a first inclined surface and a second inclined surface, When the cam rotates, the first inclined surface pushes the first transmission block, and the second inclined surface pushes the second transmission block.

4. The portable electric rubber tapping machine according to claim 3, wherein The movable part also includes a movable rod, a first end of the movable rod is provided with a knife seat, and the knife seat is used to install a knife, and the second end of the movable rod is provided with a fixing pin, the first transmission block and the second transmission block are both circular rings and are respectively sleeved on the first end and the second end of the fixing pin, and needle bearings are provided between the first transmission block and the fixing pin and between the second transmission block and the fixing pin.

5. The portable electric rubber tapping machine according to claim 3, characterized in that There is at least one first inclined surface, and there is at least one second inclined surface, and the number of the first inclined surfaces is equal to the number of the second inclined surfaces.

6. The portable electric rubber tapping machine according to any one of claims 1 to 5, characterized in that A groove is formed on the surface of the inclined surface. A rolling body protruding from the surface of the inclined surface is arranged in the groove. When the cam rotates, the rolling body rolls in contact with the transmission member.

7. The portable electric rubber tapping machine according to claim 1, wherein The cam includes a first cam, the transmission member includes a second cam, the first cam and the second cam are arranged in mirror symmetry, and rolling bodies are arranged on the inclined surface of the first cam and / or the inclined surface of the second cam.

8. The portable electric rubber tapping machine according to claim 1, wherein The driving unit includes a driving motor and a rotating shaft. The cam is located at the first end of the rotating shaft, and the cam and the rotating shaft are an integral structure. The output end of the driving motor is connected to the second end of the rotating shaft.

9. The portable electric rubber tapping machine according to claim 8, wherein The cam is connected to a supporting structure, which includes a thrust bearing, a ball and a ring sleeve, wherein: The cam is connected to the ring sleeve and the two rotate synchronously. A ball is provided between the ring sleeve and the thrust bearing. The thrust bearing is fixedly installed in the housing.

10. The portable electric rubber tapping machine according to claim 4, characterized in that, The shell is provided with a port, a sleeve is fixedly provided in the shell, the movable rod extends into and passes through the sleeve, and the second end of the movable rod extends out of the port; Also includes: a first limiting block fixedly arranged at the first end of the sleeve, A second limiting block is fixedly arranged at the second end of the sleeve, A spring is arranged between the first limit block and the second limit block, and the spring is sleeved on the movable rod, and the two ends of the spring are respectively against the first limit block and the second limit block. The spring can push the movable rod to translate toward the direction close to the cam.

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