Rechargeable brushless no-spark pipe cutting machine

Abstract

The invention relates to a rechargeable brushless no-spark pipe cutting machine, which is applied to cutting coated stainless steel pipes, stainless steel pipes, thin steel wire conduits (EMT pipes), copper pipes and plastic pipes, and comprises a pipe cutting machine base, a damping cutting semi-automatic peeling mechanism, a charging device and a control handle. Two rollers are arranged on the surface of a pipe cutting machine base, and a direct-current brushless motor, a planetary gearbox and a PCB control module are arranged in the pipe cutting machine base. The damping cutting-off semi-automatic peeling mechanism is arranged above the pipe cutting machine base and connected with the planetary gearbox, and the damping cutting-off semi-automatic peeling mechanism is connected with the gear reduction mechanism; the charging device is arranged on the side edge of the pipe cutting machine base. The control handle is pivoted to the top end of the pipe cutting machine base and electrically connected with the PCB control module. Therefore, the coated foaming layer can be directly stripped and the stainless steel pipe can be directly cut at the same time, the operation time is effectively shortened, and the working efficiency can be obviously improved.

Description

Technical Field

[0001] The present invention relates to a technology of a rechargeable brushless and sparkless pipe cutting machine, and particularly to a rechargeable brushless and sparkless pipe cutting machine that can simultaneously strip the coated foam layer and cut stainless steel pipes, has a light overall weight, and can be more applied to a clean room or a harsh environment to improve work efficiency and cutting quality. Background Art

[0002] Taiwan, China has an island-type climate and is surrounded by the sea on all sides. Therefore, it has the opportunity to rain throughout the year, resulting in a humid and water-rich overall environment. Using ordinary metals is prone to rusting problems, and choosing other materials has low rigidity. Therefore, stainless steel pipes have become the first choice for various building materials such as anti-theft doors and windows, railing handrails, etc.

[0003] When stainless steel pipes are made into various building materials, they need to be continuously cut. The traditional cutting method is to use a large pipe cutting machine, and the large pipe cutting machine is configured in the factory building for a large amount of cutting. However, the large pipe cutting machine is large in size and heavy in weight, not suitable for carrying or moving to various places for use. Although it can cut a large amount, its flexibility is insufficient and it is not suitable for occasions that require cutting stainless steel pipes at any time.

[0004] Moreover, the structure of the traditional pipe cutting machine is a common brushed motor. Sparks will be generated during the friction between the carbon brush of the motor and the commutator. The carbon brush itself is mainly composed of a graphite carbon molecular structure. Under the driving state of the motor, carbon molecules will disperse in the air. Therefore, it cannot be used in the environment of a clean room.

[0005] Furthermore, the traditional pipe cutting machine is plug-in type and cannot be moved for use. And it can only simply cut pipe fittings and does not have the function of peeling. Therefore, before cutting the pipe, the coated foam layer of the stainless steel pipe needs to be peeled off with other tools or machines first, and then the pipe cutting work can be carried out, which will relatively prolong the operation time and reduce work efficiency.

[0006] Therefore, how to invent a rechargeable brushless and sparkless pipe cutting machine that can simultaneously strip the coated foam layer and cut stainless steel pipes, significantly shorten the working time, and have no sparks at all during pipe cutting, can be more applied to a clean room or an environment with flammable gases, and can be used without plugging in, can avoid staff accidentally kicking or touching the wires, resulting in staff falling or getting an electric shock, and the overall weight is half of that of the traditional cutting machine, and can more easily move the operation position, thereby greatly improving the overall practicability and convenience, will be the point that the present invention actively discloses. Summary of the Invention

[0007] The object of the present invention is to provide a rechargeable brushless and sparkless pipe cutting machine, which is mainly equipped with a DC brushless motor and a planetary gearbox, and is equipped with a shock-absorbing cutting semi-automatic peeling mechanism, etc. It can peel and cut at the same time, and then use the characteristics of the DC brushless motor to have no sparks during cutting, which is more suitable for use in clean rooms or places with flammable gases. The overall weight is half of that of traditional machines, and it is a rechargeable mode, so it can be used without connecting a power cord, which can further improve the overall practicality and convenience.

[0008] To achieve the above object, the present invention provides a rechargeable brushless and sparkless pipe cutting machine, which is applied to cut coated stainless steel pipes, stainless steel pipes, thin steel wire conduits (EMT pipes), copper pipes and plastic pipes, and includes: a pipe cutting machine base, a shock-absorbing cutting semi-automatic peeling mechanism, a charging device and a control handle. Two rollers are provided on the surface of the pipe cutting machine base, and a DC brushless motor, a planetary gearbox and a PCB control module are provided inside. The DC brushless motor and the planetary gearbox are integrally assembled in a closed manner. The PCB control module is electrically connected to the DC brushless motor and the planetary gearbox to control the operation of the DC brushless motor and the planetary gearbox; the shock-absorbing cutting semi-automatic peeling mechanism is arranged above the pipe cutting machine base and connected to the planetary gearbox, and the shock-absorbing cutting semi-automatic peeling mechanism further includes: a rack rail auxiliary frame, a left roller frame and a right roller frame. A rack is pivotally connected to the center of the rack rail auxiliary frame, and a cutting circular knife is pivotally connected to the center below the rack; the left roller frame is arranged on the left side of the rack rail auxiliary frame, and a left peeling circular knife is pivotally connected to the center of the left roller frame; the right roller frame is arranged on the right side of the rack rail auxiliary frame, and a right peeling circular knife is pivotally connected to the center of the right roller frame, and the left peeling circular knife and the right peeling circular knife are respectively located on the left and right sides of the cutting circular knife. The charging device is arranged on the side of the pipe cutting machine base and communicates with the inside of the pipe cutting machine base, so that the PCB control module is located in the charging device and is electrically connected to the charging device; the control handle is composed of a ratchet handle connected to a switch handle at one end, the control handle is pivotally connected to the top of a pipe cutting machine base and is electrically connected to the PCB control module, and a trigger signal switch is arranged on the bottom surface of the switch handle. The trigger signal switch has the functions of soft start and stepless speed regulation, and the operating speed is controlled by the depth of the operator pressing the trigger signal switch.

[0009] In a preferred embodiment, the pipe cutting machine base is composed of a dust and water protection design (Extreme protection technology; EPT) system, and screw holes are respectively provided on both sides of the pipe cutting machine base for locking on the workbench or the ground. The aforementioned dust and water protection design (Extreme protection technology; EPT) system mainly inputs voltage from the charging device to the PCB control module, and the PCB control module is built with a metal oxide semiconductor field effect transistor (MOSFET), which has the effects of low on-resistance and high switching speed.

[0010] In a preferred embodiment, a spring, a spring thimble and an adjusting screw are provided in the rack from bottom to top. The charging device is an 18V lithium battery pack, and the charging device can be detached from the side of the pipe cutting machine base and replaced with different charging devices. An LED indicator is provided on the control handle for use when cutting pipes in a dimly lit area. A switch diverter is further provided inside the control handle. The trigger signal switch is arranged on the switch diverter, and a safety toggle is also arranged on the switch diverter. Description of the Drawings

[0011] Figure 1 Fig. is a three-dimensional exploded view of a preferred embodiment of the rechargeable brushless and sparkless pipe cutting machine of the present invention.

[0012] Figure 2 Fig. is a three-dimensional combined external view of a preferred embodiment of the rechargeable brushless and sparkless pipe cutting machine of the present invention.

[0013] Figure 3A Fig. is a side view of a preferred embodiment of the rechargeable brushless and sparkless pipe cutting machine of the present invention.

[0014] Figure 3B is Figure 3A Partial sectional enlarged view of the A-A section line (1:5) of

[0015] Figure 4A Fig. is another angle side view of a preferred embodiment of the rechargeable brushless and sparkless pipe cutting machine of the present invention.

[0016] Figure 4B is Figure 4A Partial sectional enlarged view of the A-A section line (1:4) of

[0017] Description of the Reference Numerals

[0018] 1 ------ Rechargeable brushless and sparkless pipe cutting machine

[0019] 11 ------ Pipe cutting machine base

[0020] 110 ------ Roller

[0021] 111 ------ DC brushless motor

[0022] 112 ------ Planetary gearbox

[0023] 113 ------ PCB control module

[0024] 114 ------ Screw hole

[0025] 12 ------ Shock-absorbing cutting semi-automatic peeling mechanism

[0026] 120 ------ Rack

[0027] 1201---Spring

[0028] 1202---Spring ejector pin

[0029] 1203---Adjusting screw

[0030] 121----Rack slide rail auxiliary frame

[0031] 122----Left roller frame

[0032] 123----Right roller frame

[0033] 124----Cutting circular knife

[0034] 125----Left peeling circular knife

[0035] 126----Right peeling circular knife

[0036] 13-----Charging device

[0037] 14-----Control handle

[0038] 141----Ratchet handle

[0039] 142----Switch handle

[0040] 143----Trigger signal switch

[0041] 144----Switch diverter

[0042] 145----Safety paddle Detailed implementation manners

[0043] The following describes the implementation manners of the present invention through specific specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0044] The following describes the embodiments of the present invention with reference to the drawings. It should be noted that the following drawings are simplified schematic diagrams, and only illustrate the basic concept of the present invention in a schematic manner. Therefore, only the structures related to the present invention are illustrated in the drawings, rather than being drawn according to the number, shape, and size of the components in actual implementation. The types, quantities, and ratios of the components in actual implementation are not limited by the drawings and can be changed according to actual design needs. This is stated first.

[0045] First, please refer to Figure 1 、 Figure 2 、 Figure 3A 、 Figure 3B 、 Figure 4A and Figure 4B shown, which are the three-dimensional exploded view, three-dimensional combined external view, side view of a preferred embodiment of the rechargeable brushless and sparkless pipe cutting machine of the present invention,Figure 3A Partial sectional enlarged view, side view from another angle, and Figure 4A Partial sectional enlarged view. As shown in the figure, the present invention is a rechargeable brushless and sparkless pipe cutter 1, which is applied to cut coated stainless steel pipes, stainless steel pipes, thin steel wire conduits (EMT pipes), copper pipes, and plastic pipes, and includes: a pipe cutter base 11, a shock-absorbing cutting and semi-automatic peeling mechanism 12, a charging device 13, and a control handle 14. Two rollers 110 are provided on the surface of the pipe cutter base 11, and a DC brushless motor 111, a planetary gearbox 112, and a PCB control module 113 are provided inside. The DC brushless motor 111 and the planetary gearbox 112 are integrally and hermetically assembled. The PCB control module 113 is electrically connected to the DC brushless motor 111 and the planetary gearbox 112 to control the operation of the DC brushless motor 111 and the planetary gearbox 112; the shock-absorbing cutting and semi-automatic peeling mechanism 12 is arranged above the pipe cutter base 11 and connected to the planetary gearbox 112. The shock-absorbing cutting and semi-automatic peeling mechanism 12 further includes: a rack rail auxiliary frame 121, a left roller frame 122, and a right roller frame 123. A rack 120 is pivotally connected to the center of the rack rail auxiliary frame 121, and a cutting circular knife 124 is pivotally connected to the center below the rack 120; the left roller frame 122 is arranged on the left side of the rack rail auxiliary frame 121, and a left peeling circular knife 125 is pivotally connected to the center of the left roller frame 122; the right roller frame 122 is arranged on the right side of the rack rail auxiliary frame 121, and a right peeling circular knife 126 is pivotally connected to the center of the right roller frame 122, and the left peeling circular knife 125 and the right peeling circular knife 126 are respectively located on the left and right sides of the cutting circular knife 124. The charging device 13 is arranged on the side of the pipe cutter base 11 and communicates with the inside of the pipe cutter base 11, so that the PCB control module 113 is located inside the charging device 13 and is electrically connected to the charging device 13; the control handle 14 is composed of a ratchet handle 141 connected to a switch handle 142 at one end. The control handle 14 is pivotally connected to the top of a pipe cutter base 11 and is electrically connected to the PCB control module 113. A trigger signal switch 143 is provided on the bottom surface of the switch handle 142. The trigger signal switch 143 has the functions of soft start and stepless speed regulation, and the operating speed is controlled by the depth of the operator pressing the trigger signal switch 143.

[0046] In one embodiment, the pipe cutter base 11 is composed of a dust and water protection design (Extreme protection technology; EPT) system, and a screw hole 114 is provided on each side of the pipe cutter base 11 for locking on a workbench or the ground. The dust and water protection design (Extreme protection technology; EPT) system mainly inputs voltage from the charging device 13 to the PCB control module 113. The PCB control module 113 is built with a metal oxide semiconductor field effect transistor (MOSFET), which has functions such as low on-resistance and high switching speed.

[0047] As Figure 1 shown, the charging device 13 is an 18V lithium battery pack, and the charging device 13 can be detached from the side of the base 11 of the pipe cutting machine and replaced with different charging devices 13. Therefore, lithium battery packs of different brands on the market can be used interchangeably and can be charged and reused, which is both environmentally friendly and cost-saving. When charging, the charging device 13 can be removed first for charging without having to move the entire machine, which further improves the convenience during charging. If long-term use is required, multiple charging devices 13 can be prepared for standby, so there will be no problem of insufficient power either.

[0048] As Figure 3B shown, a spring 1201, a spring ejector pin 1202 and an adjusting screw 1203 are arranged in the rack 120 from bottom to top. The elastic force of the spring 1201 can be controlled by the depth of positioning of the adjusting screw 1203. Therefore, PE coating layers with various thicknesses of 1 to 6 millimeters commonly found on the market can be cut.

[0049] In addition, as Figure 1 shown, a switch diverter 144 is further arranged in the control handle 14. The trigger signal switch 143 is arranged on the switch diverter 144 and protrudes to the outside, and a safety dial 145 is arranged on the switch diverter 144, and one end of the safety dial 145 also protrudes to the outside. Thus, when not in use, the safety dial 145 can be pressed to lock the trigger signal switch 143, making the trigger signal switch 143 unable to be pressed, that is, unable to be started, which can further prevent accidental activation and improve safety. Moreover, an LED indicator light is arranged on the control handle 14 for use when cutting pipes in a dim place.

[0050] With the above structural description, during actual use, the pipe to be cut is set between the two rollers 110 of the base 11 of the pipe cutting machine. The operator presses the trigger signal switch 143 on the control handle 14 to start the DC brushless motor 111 and the planetary gearbox 112, so that the two rollers 110 rotate to drive the pipe to be cut. First, it will contact the left peeling circular knife 125 and the right peeling circular knife 126 with a larger outer diameter to first peel the outer coating foam layer of the pipe to be cut, and then the cutting circular knife 124 located in the center will perform the final cutting action, so that the coating foam layer and the pipe to be cut can be stripped at the same time. And because a spring 1201, a spring ejector pin 1202 and an adjusting screw 1203 are arranged in the rack 120 above the cutting circular knife 124, the vibration caused by the 360-degree rotation of the pipe to be cut during cutting can be effectively suppressed during peeling, so the comfort during cutting and the cutting efficiency can be improved. In addition, the cutting pipe diameter range can also be increased to 15mm - 60.5mm, which can be effectively applied to the maximum stainless steel pipe diameter required in current pipe installation projects.

[0051] Compared with the prior art, the rechargeable brushless and sparkless pipe cutting machine of the present invention mainly uses a DC brushless motor 111, so there is no wear of the carbon brush, which can reduce the generation of heat energy. When the charging device 13 is fully charged, it can be fully applied to the DC brushless motor 111, and the DC brushless motor 111 will not have a temperature rise or overheat reaction under the working environment of long-term operation and cutting hard pipe fittings, so the working efficiency can be improved. Coupled with the shock-absorbing cutting semi-automatic peeling mechanism 12, it can cut completely without sparks, and can be more applied to a clean room or an environment with flammable gases to avoid the risk of explosion. The pipe cutting machine base 11 is composed of a dust-proof and water-proof design (Extreme protection technology; EPT) system, and is more suitable for application in dusty construction sites or harsh occasions such as outdoor rain. In addition, the PCB control module 113 is arranged on the aluminum alloy shell, which has the effect of rapid heat dissipation, and the PCB control module 113 and the aluminum alloy shell are encapsulated with potting glue, so that the PCB control module 113 can work stably even in a harsh environment. Therefore, it can achieve the effects of improving work efficiency, improving practicality and improving service life.

[0052] Although the foregoing description and drawings have disclosed the preferred embodiments of the present invention, it must be understood that various additions, many modifications and substitutions may be made to the preferred embodiments of the present invention without departing from the spirit and scope of the principles of the present invention as defined in the appended claims. Those of ordinary skill in the art to which the present invention pertains will appreciate that the present invention can be used in many forms, structures, arrangements, proportions, materials, components and assemblies. Therefore, the embodiments disclosed herein should be considered as illustrative of the present invention and not as limiting the present invention. The scope of the present invention should be defined by the claims and cover their legal equivalents, and is not limited to the previous description.

Claims

1. A rechargeable brushless and sparkless pipe cutter, which is applied to cut coated stainless steel pipes, stainless steel pipes, thin steel wire conduits, copper pipes and plastic pipes, and is characterized in that Comprising: All pipe cutting machine bases, with two rollers on the surface, and a DC brushless motor, a planetary gearbox and a PCB control module inside. The DC brushless motor and the planetary gearbox are integrally and hermetically assembled. The PCB control module is electrically connected to the DC brushless motor and the planetary gearbox to control the operation of the DC brushless motor and the planetary gearbox; A shock-absorbing and cutting semi-automatic peeling mechanism, arranged above the pipe cutting machine base and connected to the planetary gearbox. The shock-absorbing and cutting semi-automatic peeling mechanism further comprises: A rack slide rail auxiliary frame, with a rack pivotally connected in the center, and a cutting circular knife pivotally connected in the center below the rack; A left roller frame, arranged on the left side of the rack slide rail auxiliary frame, and a left peeling circular knife pivotally connected in the center of the left roller frame; A right roller frame, arranged on the right side of the rack slide rail auxiliary frame, and a right peeling circular knife pivotally connected in the center of the right roller frame. The left peeling circular knife and the right peeling circular knife are respectively located on the left and right sides of the cutting circular knife; and A charging device, arranged on the side of the pipe cutting machine base and communicating with the inside of the pipe cutting machine base, so that the PCB control module is located in the charging device and is electrically connected to the charging device; and A control handle, composed of a ratchet handle connected to a switch handle at one end. The control handle is pivotally connected to the top of the pipe cutting machine base and is electrically connected to the PCB control module. A trigger signal switch is arranged on the bottom surface of the switch handle. The trigger signal switch has the functions of soft start and stepless speed regulation, and the operating speed is controlled by the depth of the operator pressing the trigger signal switch.

2. The rechargeable brushless and sparkless pipe cutting machine according to claim 1, characterized in that The pipe cutting machine base is composed of a dust-proof and water-proof design system, and there are screw holes on both sides of the pipe cutting machine base for fixing on the workbench or the ground.

3. The rechargeable brushless and sparkless pipe cutting machine according to claim 2, characterized in that The dust-proof and water-proof design system mainly inputs voltage from the charging device to the PCB control module. The PCB control module is built with metal oxide semiconductor field effect transistors, which have effects such as low on-resistance and high switching speed.

4. The rechargeable brushless and sparkless pipe cutting machine according to claim 1, wherein A spring, a spring thimble and an adjusting screw are arranged in the rack from bottom to top.

5. The rechargeable brushless and sparkless pipe cutting machine according to claim 1, wherein The charging device is an 18V lithium battery pack, and the charging device can be detached from the side of the pipe cutting machine base and different charging devices can be replaced.

6. The rechargeable brushless and sparkless pipe cutting machine according to claim 1, characterized in that An LED indicator light is arranged on the control handle for use when cutting pipes in a dim place.

7. The rechargeable brushless and sparkless pipe cutting machine according to claim 1, wherein A switch diverter is further arranged inside the control handle. The trigger signal switch is arranged on the switch diverter, and a safety paddle is further arranged on the switch diverter.

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