CN111069693A - Cylindrical pipe driving type cutting tool - Google Patents

Abstract

The invention discloses a driving type cutting tool for cylindrical pipe fittings, which comprises a driving main body, a clamping arm assembly, a tensioning assembly and other assemblies, wherein a central shaft is transversely fixed at the center of a base of the driving main body; the cutting machine is characterized in that a motor base is installed at the center position in the base, a cutting motor is fixed on the motor base, a cutting saw blade is installed on a rotating shaft of the cutting motor, and the axis of the cutting saw blade is parallel to the axis of the wheel shaft. The invention relates to a portable cylindrical pipe fitting cutting tool which is movable for cutting and convenient to use. The pipe cutting machine can drive the cylindrical pipe fitting to continuously rotate and cut circularly in the pipe cutting process until the cylindrical pipe fitting is finally cut off.

Description

Cylindrical pipe driving type cutting tool

Technical Field

The invention belongs to the technical field of machining cutting tools, and particularly relates to a driving type cutting tool for a cylindrical pipe fitting.

Background

With the development of the construction industry, the processing methods of the building materials are more and more. Steel pipes are the most widely used building material in construction. The steel pipe cutting device is characterized in that a long raw material steel pipe needs to be cut into sections or pieces with required specifications and sizes in the production of the steel pipe, the steel pipe is usually cut into lengths meeting the use requirements in the use process of the steel pipe, the steel pipe needs to be cut into different lengths according to the specific requirements, a certain allowance is generally needed in the construction process, and the surplus allowance is cut. Mainly there is hydraulic pressure cutting machine in the trade now, numerical control hydraulic pressure cutting machine, electric cutter, pneumatic cutting machine etc. and these cutting machines all are that the volume is comparatively huge mostly, all need carry fixed position to the steel pipe when cutting large-scale steel pipe, cut after the clamping location, because steel pipe itself is heavier, the inconvenient cutting-off operation that causes of transport is also comparatively complicated, cuts off efficiency lower, can not satisfy the requirement, handling still knocks down the steel pipe easily, causes the loss. The existing handheld cutting machine firstly needs to measure a steel pipe during cutting, measures the length to be cut, then marks a cutting line at a cutting position, holds the steel pipe with one hand, and operates the cutting machine with the other hand to cut the steel pipe along the marking position. For example, the publication number is CNCN 208033778U's a steel pipe cutting device, the equal fixedly connected with sleeve post in both sides of cutting device body, the spout has all been seted up to the both sides of sleeve post inner chamber, the inner chamber swing joint of spout has the slider, fixedly connected with flexible post between two sliders, the middle part fixedly connected with spring at flexible capital portion, the bottom of flexible post runs through sleeve post fixedly connected with back backup plate, the upper portion at the positive middle part of back backup plate is seted up flutedly, the middle part swing joint at the recess inner chamber back has the lead screw, the front threaded connection in the lead screw outside has preceding backup plate, the centre gripping groove has all been seted up with the middle part of back backup plate relative one side to preceding backup plate, the inner chamber fixedly connected with slipmat in centre gripping groove. Although the problem that current portable steel pipe cutting device can not effectively stabilize centre gripping steel pipe has been solved in the technique, this kind of portable steel pipe cutting device is in cutting process, by the workman with the hand support and be close to the steel pipe with the pivoted cutting wheel and cut it to it, owing to lack and stabilize the centre gripping structure, the phenomenon of skew appears easily in cutting process, causes the cutting inaccurate, and this problem that just leads to current portable steel pipe cutting device can not effectively stabilize the centre gripping steel pipe appears. The steel pipe is required to be polished at the cutting position after the cutting is finished, and the polishing process and the cutting process are separated, so that the production efficiency is reduced.

Disclosure of Invention

Aiming at the problems of low working efficiency and poor cutting precision of the conventional cylindrical pipe cutting tool in the using process, the invention provides a portable cylindrical pipe driving type cutting tool which can realize efficient and accurate cutting operation.

The technical scheme adopted by the invention for solving the technical problems is as follows: a driving type cutting tool for cylindrical pipe fittings comprises a driving main body, a clamping arm assembly, a tensioning assembly and other assemblies, wherein the driving main body comprises a base, a right swing seat, a left swing seat, a motor seat and a cutting saw blade, a central shaft is transversely fixed at the center of the base, the central shaft is sleeved with the right swing seat and the left swing seat at the same time, a mechanism for enabling the right swing seat and the left swing seat to be drawn close to each other is arranged, wheel shafts are respectively arranged at the lower ends of the right swing seat and the left swing seat, each wheel shaft is respectively provided with a roller wheel, and at least one wheel shaft is in transmission connection with the driving mechanism; the cutting machine is characterized in that a motor base is installed at the center position in the base, a cutting motor is fixed on the motor base, a cutting saw blade is installed on a rotating shaft of the cutting motor, and the axis of the cutting saw blade is parallel to the axis of the wheel shaft.

The side of right side pendulum seat and left pendulum seat articulates respectively has corresponding card arm subassembly, and the card arm subassembly of every side includes main swing arm and follows the swing arm, and both are articulated together through well round pin axle, and the root of main swing arm articulates on corresponding pendulum seat through root round pin axle, and the end of following the swing arm outwards bends and forms the coupler body, has the assistance swing arm through last round pin axle articulated in crooked turning position, and the movable pulley is installed to the end of assisting the swing arm, and the fixed pulley is installed to the end of coupler body, and movable pulley and fixed pulley all support the lateral wall at cylindrical workpiece.

Tensioning assemblies are also provided for bringing the master and slave swing arms inwardly. The first implementation mode of the tensioning assembly is as follows: the tension assembly is formed by connecting a tension spring between the master swing arm and the slave swing arm or connecting a tension spring between the slave swing arm and the corresponding swing seat. The second implementation mode of the tensioning assembly is as follows: the tensioning assembly comprises an elastic pull rod, the root of the pull rod is hinged to the corresponding swing seat through an inner pin shaft, and the tail end of the pull rod is hinged to the corresponding swing seat through an outer pin shaft. The elastic pull rod is a sleeve assembly which is sleeved with each other and can be stretched, a spring which enables two ends to be tensioned inwards is sleeved in the sleeve assembly, or the elastic pull rod is an air cylinder or a hydraulic cylinder.

The positioning assembly comprises a positioning rod and a thrust spring, a through positioning sleeve is arranged in the middle of the main swing arm, the positioning rod is sleeved in the positioning sleeve in a matching mode and can slide along the axial direction, a blocking table is arranged at the lower end of the positioning rod, a conical pressure head or a conical edge wheel is arranged at the tail end of the positioning rod, the thrust spring is connected between the blocking table and the inner wall of the main swing arm, the conical pressure head or the conical edge wheel is supported on the outer side wall of a cylindrical workpiece, and the tip of the axis of the conical pressure head or the conical edge wheel is in the same plane with the saw blade displacement.

In the above scheme, the mechanism for drawing the right swing seat and the left swing seat inward is that a tension spring is connected between the two swing seats, or a torsion spring is sleeved on the central shaft, and two ends of the torsion spring are respectively pressed on the outer sides of the two swing seats to urge the two swing seats to compress inward.

In the above scheme, the driving mechanism connected with the wheel shaft is a speed reduction motor, and the speed reduction motor is fixed on the inner side wall of the base. Moreover, the lifting handle is fixed on the base, so that the tool is small in overall gravity and can realize a portable function.

A radial slideway is arranged between the motor base and the base to enable the motor base and the base to slide relatively, and a thrust spring or a tension spring is connected between the motor base and the base to enable the motor base to pop out outwards along the radial direction.

And a torsion spring can be further sleeved outside the tail pin shaft, so that the auxiliary swing arm approaches to one side of the hook body.

The invention has the beneficial effects that: the invention relates to a portable cylindrical pipe fitting cutting tool which is movable for cutting and convenient to use. The pipe cutting machine can drive the cylindrical pipe fitting to continuously rotate and cut circularly in the pipe cutting process until the cylindrical pipe fitting is finally cut off. The invention utilizes the matching of the roller, the fixed pulley and the movable pulley which are axially attached to the surface of the pipe fitting and roll in the cutting process and surround the periphery of the cylindrical key, and can ensure that the saw blade is perpendicular to the cylindrical pipe fitting for cutting in the process of cutting whether the cylindrical pipe fitting is inclined or not, and the cylindrical pipe fitting is always in a stable state in the rotating process to prevent cutting deflection, so that the problem of cutting deflection is not needed to be worried about, and the operation efficiency is high. In the implementation process, the steel pipe is rapidly rotated for several to tens of weeks, the cutting depth is gradually increased, the cutting section is neat and has no burrs, and trimming is basically not needed after cutting.

The invention also adopts the positioning component, the conical pressure head or the conical edge wheel of the positioning component can be always clamped in the annular cutting seam in the rotating and passing process of the cylindrical pipe fitting, and the positioning and restraining effects of the conical pressure head or the conical edge wheel are utilized to ensure that the cutting path is inconvenient and always positioned at the perfect circle position until the cutting is finished.

Drawings

Fig. 1 is a schematic view of the state of use of the present invention.

Fig. 2 is a side schematic view of fig. 1.

Reference numbers in the figures: the device comprises a driving main body 1, a clamping arm component 2, a tensioning component 3, a positioning component 4, a cylindrical workpiece 5, a right swing seat 11, a left swing seat 12, a central shaft 13, a wheel shaft 14, a roller wheel 15, a motor seat 16, a cutting saw blade 17, a handle 18, a base 19, a main swing arm 21, a slave swing arm 22, a hook body 23, an auxiliary swing arm 24, a fixed pulley 25, a movable pulley 26, a middle pin shaft 27, a tail pin shaft 28, a root pin shaft 29, a pull rod 31, an inner pin shaft 32, an outer pin shaft 33, a positioning rod 41, a positioning sleeve 42, a baffle table 43, a conical pressure head 44 and a thrust spring 45.

Detailed Description

There is provided a cylindrical pipe cutting tool as shown in figure 1 which comprises a drive body 1, a clamping arm assembly 2 and a tensioning assembly 3. The tool can be sleeved on the outer side of the cylindrical pipe fitting 5 as shown in fig. 1, and can drive the cylindrical pipe fitting to rotate in the working process. The cutting tool is particularly applied to fixed-length cutting of cylindrical steel pipes on construction sites as a portable tool.

Wherein, the base 19 of the driving body 1 is mounted with the right swing base 11, the left swing base 12, the motor base 16, the cutting blade 17, etc. as a base member. Specifically, a central shaft 13 is transversely fixed at the center of the base 19, and the central shaft 13 is sleeved with the right swing seat 11 and the left swing seat 12. A mechanism for drawing the right swing seat 11 and the left swing seat 12 inward is provided, for example, a tension spring may be connected between the master swing arm 21 and the slave swing arm 22 or between the slave swing arm 22 and the corresponding swing seat for the tension assembly 3. A handle 18 is fixed to the base 19.

The lower ends of the right swing seat 11 and the left swing seat 12 are respectively provided with a wheel shaft 14, each wheel shaft 14 is respectively provided with a roller 15, the wheel shafts 14 at two sides or the wheel shaft 14 at one side are in transmission connection with a driving mechanism, the driving mechanism is a common speed reducing motor, and the speed reducing motor is fixed on the inner side wall of the base 19. The speed reducing motor can be controlled to work independently through a button, and can also work synchronously in a cutting motor. In the pipe cutting process, the cylindrical pipe fitting can be driven to rotate and cut continuously and circularly until the cylindrical pipe fitting is cut off finally.

A motor base 16 is installed in the center of the inside of the base 11, a cutting motor is fixed in the motor base 16, a cutting saw blade 17 is installed on a rotating shaft of the cutting motor, and the axis of the cutting saw blade is parallel to the axis of the wheel shaft, namely the cutting saw blade 17 is always vertical to the cylindrical pipe fitting. A radial slideway is arranged between the motor base 16 and the base 19 to enable the motor base 16 and the base to slide relatively, and a thrust spring or a tension spring is connected between the motor base 16 and the base 19 to enable the motor base 16 to pop out radially. Utilize in the cutting process with the rolling running roller of pipe fitting surface axial laminating and fixed pulley and movable pulley cooperation, encircle around the cylinder key, no matter whether the cylinder pipe fitting inclines, and cross the in-process and can both ensure the cutting of saw bit perpendicular to cylinder pipe fitting, and cylinder pipe fitting rotates the in-process and is in the steady state all the time, prevents the cutting skew to need not worry the cutting skew problem, operating efficiency is high.

And the side surfaces of the right swing seat 11 and the left swing seat 12 are respectively hinged with corresponding clamping arm assemblies 2. The two sides of the clamping arm component 2 are symmetrical. The clamp arm assembly 2 on each side comprises a main swing arm 21 and a slave swing arm 22, the main swing arm 21 and the slave swing arm 22 on the same side are hinged together through a middle pin shaft 27, and the root of the main swing arm 21 is hinged on the corresponding swing seat through a root pin shaft 29.

As shown in the figure, a hook body 23 is formed by bending the tail end of a swing arm 22 outwards, an auxiliary swing arm 24 is hinged at the bending corner position through a tail pin shaft, a movable pulley 26 is installed at the tail end of the auxiliary swing arm 24, a fixed pulley 25 is installed at the tail end of the hook body 23, and the movable pulley 26 and the fixed pulley 25 are both supported on the outer side wall of the cylindrical workpiece 5. A torsion spring may be sleeved on the outer side of the end pin 28 to make the auxiliary swing arm 24 approach to the hook body 23.

With the tensioning assembly 3 being located inwardly of the master swing arm 21 and the slave swing arm 22. The fixed pulleys 25 and the movable pulleys 26 on the two sides are matched with the roller wheels 15 to surround the cylindrical key and are axially attached to the surface of the pipe fitting to roll, so that the cylindrical pipe fitting 5 is always vertical to the cutting saw blade 17.

A tensioning assembly 3 is also arranged to ensure that the clamping arm assemblies 2 on two sides can be sleeved on the side wall of the cylindrical steel pipe 5. The tensioning assembly 3 used in this embodiment comprises an elastic pull rod 31, the root of the pull rod 31 is hinged to the corresponding swing seat through an inner pin 32, and the end of the pull rod 31 is hinged to the corresponding swing seat through an outer pin 33. The elastic pull rod 31 is a telescopic sleeve assembly which is sleeved with each other, and a spring for urging the two ends to be tensioned inwards is sleeved in the sleeve assembly. Adopt behind the tensioning assembly 3 card arm component 2 of both sides can be automatic to inwards contract, and this implementation cutting tool is when using, presses downwards directly over cylindrical pipe spare 5, is that the fixed pulley 25 of both sides contacts cylindrical pipe spare 5 at first and outwards expandes. A handle may be disposed outside the main swing arm 21 of any one of the tensioning assemblies 3, and the handle is pulled upward to place the corresponding clamp arm assembly 2 in an open state, so as to assemble the cutting tool outside the cylindrical pipe 5.

Example 2: on the basis of embodiment 1, the positioning device further comprises a positioning assembly 4 installed in the middle of at least one main swing arm 21, as shown in fig. 1, the positioning assembly 4 comprises a positioning rod 41 and a thrust spring 45, a through positioning sleeve 42 is arranged in the middle of the main swing arm 21, and the positioning rod 41 is sleeved in the positioning sleeve 42 in a matching manner and can slide along the axial direction. The lower end of the positioning rod 41 is provided with a stop table 43, the tail end is provided with a conical pressure head 44, and the thrust spring 45 is connected between the stop table 43 and the inner wall of the main swing arm 21. Wherein, the conical pressure head 44 is supported on the outer side wall of the cylindrical workpiece 5, and the axial center tip of the conical pressure head 44 is in the same plane with the displacement of the saw blade. Rotatory by and the in-process at cylinder pipe fitting, locating component's toper pressure head or awl reason wheel can block all the time in annular cutting seam, utilize the location and the constraint effect of toper pressure head or awl reason wheel, ensure that the cutting route is inconvenient, lie in the perfect circle position all the time, end up to the cutting.

Example 3: on the basis of the embodiment 1, the mechanism for drawing the right swing seat 11 and the left swing seat 12 inward is modified, specifically, a tension spring is connected between the two swing seats, or a torsion spring is sleeved on the central shaft, and two ends of the torsion spring are respectively pressed on the outer sides of the two swing seats to urge the two swing seats to compress inward.

Example 4: on the basis of embodiment 1, the elastic pull rod 31 can also be an air cylinder or a hydraulic cylinder, and the air cylinder or the hydraulic cylinder is adopted to enable the tensioning assemblies 3 on two sides to be unfolded and closed through operation, so that the mode is suitable for firmly clamping and disassembling large pipes and ensures reliable clamping force.

Claims (9)

1. The driving type cutting tool for the cylindrical pipe fittings is characterized by comprising a driving main body (1), a clamping arm assembly (2) and a tensioning assembly (3), wherein the driving main body (1) comprises a base (19), a right swinging seat (11), a left swinging seat (12), a motor seat (16) and a cutting saw blade (17), a central shaft (13) is transversely fixed at the center of the base (19), the central shaft (13) is sleeved with the right swinging seat (11) and the left swinging seat (12) at the same time, a mechanism for enabling the right swinging seat (11) and the left swinging seat (12) to be drawn close inwards is arranged, wheel shafts (14) are respectively arranged at the lower ends of the right swinging seat (11) and the left swinging seat (12), rollers (15) are respectively arranged on each wheel shaft (14), and at least one wheel shaft (14) is in transmission connection with the driving mechanism; a motor base is arranged at the center position in the base (11) and is fixedly provided with a cutting motor, a rotating shaft of the cutting motor is provided with a cutting saw blade (17), and the axis of the cutting saw blade is parallel to the axis of the wheel shaft; the side surfaces of the right swing seat (11) and the left swing seat (12) are respectively hinged with corresponding clamp arm assemblies (2), each clamp arm assembly (2) comprises a main swing arm (21) and a slave swing arm (22), the main swing arm (21) and the slave swing arm are hinged together through a middle pin shaft (27), the root part of the main swing arm (21) is hinged on the corresponding swing seat through a root pin shaft (29), the tail end of the slave swing arm (22) is bent outwards to form a hook body (23), an auxiliary swing arm (24) is hinged at the bent corner position through a tail pin shaft (28), the tail end of the auxiliary swing arm (24) is provided with a movable pulley (26), the tail end of the hook body (23) is provided with a fixed pulley (25), and the movable pulley (26) and the fixed pulley (25) are supported on the outer side wall; a tensioning assembly (3) is arranged at the same time, and the main swinging arm (21) and the auxiliary swinging arm (22) are inwards.

2. Driven tool for cutting cylindrical tubes according to claim 1, characterized in that the tensioning assembly (3) is a tension spring connected between the master swing arm (21) and the slave swing arm (22) or between the slave swing arm (22) and the corresponding seat.

3. Cylindrical pipe driving type cutting tool according to claim 1, characterized in that the tightening assembly (3) comprises an elastic pull rod (31), the root of the pull rod (31) is hinged on the corresponding swing seat through an inner pin shaft (32), the end of the pull rod (31) is hinged on the corresponding swing seat through an outer pin shaft (33), the elastic pull rod (31) is a mutually sleeved and telescopic sleeve assembly, a spring for forcing the two ends to be tightened inwards is sleeved in the sleeve assembly, or the elastic pull rod (31) is an air cylinder or a hydraulic cylinder.

4. The cylindrical pipe driving type cutting tool according to claim 1, further comprising a positioning assembly (4) installed in the middle of at least one main swing arm (21), wherein the positioning assembly (4) comprises a positioning rod (41) and a thrust spring (45), a through positioning sleeve (42) is arranged in the middle of the main swing arm (21), the positioning rod (41) is sleeved in the positioning sleeve (42) in a matching manner and can slide along the axial direction, a blocking platform (43) is arranged at the lower end of the positioning rod (41), a conical pressure head (44) or a conical edge wheel is arranged at the tail end of the positioning rod, the thrust spring (45) is connected between the blocking platform (43) and the inner wall of the main swing arm (21), the conical pressure head (44) or the conical edge wheel is supported on the outer side wall of the cylindrical workpiece, and the axial center tip of the conical pressure head (44) or the conical edge wheel is in the same plane.

5. The driven type cutting tool for cylindrical pipes as claimed in claim 1, wherein the mechanism for drawing the right swing seat (11) and the left swing seat (12) inward is a tension spring connected between the two swing seats, or a torsion spring is sleeved on the central shaft, and both ends of the torsion spring are respectively pressed on the outer sides of the two swing seats to urge the two swing seats to compress inward.

6. Cylindrical tube driving cutting tool according to claim 1, characterized in that the driving mechanism connected to the axle (14) is a gear motor fixed to the inner side wall of the base (19).

7. Cylindrical tube driven cutting tool according to claim 1, characterized by a handle (18) fixed to the base (19).

8. Cylindrical pipe driving type cutting tool according to claim 1, characterized in that a radial slideway is arranged between the motor base (16) and the base (19) to enable the motor base (16) and the base (19) to slide relatively, and a push spring or a pull spring is connected between the motor base (16) and the base (19) to enable the motor base (16) to be ejected outwards along a radial direction.

9. Driving type cutting tool for cylindrical pipes according to claim 1, characterized in that a torsion spring is sleeved outside the end pin (28) to make the auxiliary swing arm (24) approach to the hook (23).

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