CN217328325U

CN217328325U - Electric pipe bender

Info

Publication number: CN217328325U
Application number: CN202220505378.7U
Authority: CN
Inventors: 蒋友荣
Original assignee: Zhejiang Value Mechanical & Electrical Products Co ltd
Current assignee: Zhejiang Value Mechanical & Electrical Products Co ltd
Priority date: 2022-03-09
Filing date: 2022-03-09
Publication date: 2022-08-30
Anticipated expiration: 2032-03-09

Abstract

The utility model belongs to the technical field of the bending machine, concretely relates to electronic bending machine. To the not enough of the practical application of failing of current electronic bending machine, the utility model discloses a following technical scheme: an electric bender, comprising: a body; the driving device comprises a motor, a worm fixedly connected with an output shaft of the motor, a worm wheel matched with the worm, a nut fixedly connected with the worm wheel and a lead screw matched with the nut and capable of linearly reciprocating; the die assembly comprises a top wheel arranged on the screw rod, a cross beam arranged on the rack and two stress wheels arranged on the cross beam, wherein the top wheel is positioned between the two stress wheels; a battery to supply power to the motor; and a control component. The utility model has the advantages that: the driving device adopts a worm gear and a worm, and the single-stage speed ratio is large, the running noise is low, and the vibration is small; the driving device adopts a screw-nut pair, so that the transmission efficiency is high; the whole structure is simple and compact; the gravity center distribution is reasonable, and the pipe bender is more stable.

Description

Electric pipe bender

Technical Field

The utility model belongs to the technical field of the bending machine, concretely relates to electronic bending machine.

Background

The publication No. CN101085458A discloses a portable electric pipe bender, in which a motor powered by a battery drives a screw to drive a threaded sleeve sleeved on the screw to move linearly, and then drives a movable module fixed on the threaded sleeve to move linearly, and continuously presses a pipe disposed between the movable module and a fixed module, so as to bend and deform the pipe to a desired shape.

According to the electric pipe bender, electric automatic pipe bending is achieved through the battery, the motor and the like, the physical burden of a worker is greatly reduced, and the pipe bending time is shortened. However, the electric bender disclosed in the aforementioned patent application has many problems to be solved: 1. the driving device adopts a speed change gear set and a transmission gear set (or a belt wheel assembly), so that the transmission efficiency is low; 2. the threaded sleeve of the driving device linearly reciprocates, the threaded sleeve shakes greatly, and the gravity center distribution is unreasonable; 3. no safety protection structure is provided; 4. the pipe to be bent is sometimes clamped on the movable module and needs to be manually taken down; 5. the stress wheel is fixed, and the power required by the motor is larger, so that the size of the whole machine is larger; 6. fails to adapt to various pipe diameters; 7. there is no angular indication. Meanwhile, since the patent application is published 12/2007, no further improvement scheme of the electric pipe bender is disclosed or is rarely disclosed, and the electric pipe bender of the type is not practically applied.

Disclosure of Invention

The utility model discloses to the not enough of the practical application of failing of current electronic bending machine, provide an electronic bending machine to at least in an aspect improve to promote the practical application of this kind of electronic bending machine.

In order to achieve the above purpose, the utility model adopts the following technical scheme: an electric bender, comprising:

a body including a frame and a housing;

the driving device comprises a motor arranged on the rack and a screw-nut pair driven by the motor;

the die assembly comprises a top wheel which linearly reciprocates along with the lead screw or the nut, a cross beam arranged on the rack and two stress wheels arranged on the cross beam, wherein the top wheel is positioned between the two stress wheels;

a battery to supply power to the motor;

the control assembly is arranged on the shell.

The utility model discloses an electronic bending machine, drive arrangement adopt screw-nut pair, and transmission efficiency is high, the noise is low, compact structure, size are little. The top wheel is connected with the screw rod or the nut, the top wheel can be directly and fixedly connected with the screw rod or the nut, and the top wheel can also be fixedly connected with the screw rod or the nut through other intermediate parts.

As an improvement, the driving device also comprises a worm driven by the motor to rotate and a bevel gear matched with the worm, wherein the bevel gear is fixedly connected with the screw rod or the nut.

As an improvement, a positioning convex column is integrally formed on the helical gear, the nut comprises a threaded portion and a hole portion extending outwards from the threaded portion in the radial direction, and a positioning hole matched with the positioning convex column is formed in the hole portion.

As an improvement, a first anti-rotation hole is formed in the bevel gear, a second anti-rotation hole is formed in the nut, and a positioning pin shaft is arranged in the first anti-rotation hole and the second anti-rotation hole.

In a modification, the frame is formed with a housing chamber in which the worm, the helical gear and the nut are located, and the lead screw passes through the housing chamber.

As an improvement, a bearing is further arranged in the accommodating cavity, the bearing is sleeved outside the nut and is an angular contact bearing, or the bearing comprises a deep groove ball bearing and a thrust bearing.

As an improvement, the worm is positioned below the helical gear, and an output shaft of the motor and the worm are coaxially arranged; the motor is arranged on the frame; the shell extends to form a handle. By adopting the structure, the gravity center of the pipe bender is low. In other solutions, the worm may also be arranged above the bevel gear.

As an improvement, the driving device further comprises a worm driven by the motor to rotate and a worm wheel matched with the worm, wherein the worm wheel is provided with a first anti-rotation hole, the nut is provided with a second anti-rotation hole, and the first anti-rotation hole and the second anti-rotation hole are internally provided with a positioning pin shaft.

As an improvement, the mold assembly comprises an ejector block connected with the screw rod and the ejector wheel, the ejector block is in threaded connection with the screw rod, the ejector block is provided with an insertion part, a first clamping part is formed in the insertion part, an insertion hole in which the insertion part is inserted and a clamping part moving hole communicated with the insertion hole are formed in the ejector wheel, the mold assembly further comprises a clamping assembly, and the clamping assembly comprises a clamping piece movably arranged in the clamping part moving hole and an elastic piece acting on the clamping piece.

As the improvement, the elastic component is a compression spring, the first clamping portion is an annular groove, the clamping piece moving hole is a threaded hole, and the clamping component is a wave ball screw.

As an improvement, the upper surface of the top wheel is provided with an angle indicating mark for indicating the bending angle.

As an improvement, the angle indicating mark comprises indicating lines and indicating numbers, the indicating lines are straight lines, the indicating lines are multiple, and extension lines of the multiple indicating lines intersect at one point.

The utility model discloses an electric pipe bender's beneficial effect is: the driving device adopts a screw-nut pair, so that the transmission efficiency is high; the whole structure is simple and compact; the gravity center distribution is reasonable, and the pipe bender is more stable.

Drawings

Fig. 1 is a schematic structural view of an electric pipe bender according to a first embodiment of the present invention.

Fig. 2 is a cross-sectional view of an electric pipe bender according to a first embodiment of the present invention.

Fig. 3 is an exploded view of an electric pipe bender according to a first embodiment of the present invention.

Fig. 4 is a schematic structural diagram of an electric pipe bender according to a first embodiment of the present invention after a half shell of a hidden shell is hidden.

Fig. 5 is an exploded view of a frame of an electric pipe bender according to a first embodiment of the present invention.

Fig. 6 is a schematic structural diagram of a driving device of an electric pipe bender according to a first embodiment of the present invention.

Fig. 7 is a schematic structural diagram of a worm of a driving device of an electric pipe bender according to a first embodiment of the present invention.

Fig. 8 is a schematic structural view of a helical gear of a driving device of an electric pipe bender according to a first embodiment of the present invention.

Fig. 9 is a schematic structural view of a nut of a driving device of an electric pipe bender according to a first embodiment of the present invention.

Fig. 10 is a schematic structural view of a screw of a driving device of an electric pipe bender according to a first embodiment of the present invention.

Fig. 11 is a schematic structural view of a top wheel of a die assembly of an electric pipe bender according to a first embodiment of the present invention.

Fig. 12 is a schematic structural view of a turning wheel adjusting structure of a die assembly of an electric pipe bender according to a first embodiment of the present invention.

In the figure, 1, a fuselage; 11. a frame; 111. a frame body; 112. a frame cover; 12. a housing;

2. a drive device; 21. a motor; 22. a worm; 23. a helical gear; 24. a nut; 25. a screw rod;

3. a mold assembly; 30. a top block; 31. a top wheel; 311. an indicator line; 312. a reference numeral; 313. inserting holes; 314. a movable hole of the clamping piece; 32. a cross beam; 33. a stress wheel; 34. a ball screw; 35. a rotating wheel shaft; 36. a lower threaded member;

4. a battery;

5. a control component;

6. angular contact bearings.

Detailed Description

The technical solutions of the embodiments of the present invention will be explained and explained below with reference to the drawings of the embodiments of the present invention, but the embodiments described below are only preferred embodiments of the present invention, and are not all embodiments. Other embodiments obtained by persons skilled in the art without any inventive work based on the embodiments in the embodiment belong to the protection scope of the invention.

Referring to fig. 1 to 12, the present invention provides an electric pipe bender, which comprises:

the fuselage, including framework and body;

a battery to supply power to the motor;

the control assembly is arranged on the shell.

The utility model discloses an electronic bending machine's beneficial effect is: the driving device adopts a helical gear and a worm, and the single-stage speed ratio is large, the running noise is low, and the vibration is small; the driving device adopts a screw-nut pair, so that the transmission efficiency is high; the whole structure is simple and compact; the gravity center distribution is reasonable, and the pipe bender is more stable.

Example one

Referring to fig. 1 to 12, a first embodiment of the present invention is an electric pipe bender, which includes:

a body 1 including a frame 11 and a housing 12;

the driving device 2 comprises a motor 21 arranged on the frame 11 and positioned in the shell 12, a worm 22 fixedly connected by an output shaft of the motor 21, a helical gear 23 matched with the worm 22, a nut 24 fixedly connected with the helical gear 23 and a screw rod 25 matched with the nut 24 and capable of reciprocating linearly;

the die assembly 3 comprises a top wheel 31 arranged on the screw rod 25, a cross beam 32 arranged on the rack 11 and two stress wheels 33 arranged on the cross beam 32, wherein the top wheel 31 is positioned between the two stress wheels 33;

a battery 4 for supplying power to the motor 21;

and the control component 5 is arranged on the shell 12.

In this embodiment, the helical gear 23 is integrally formed with a positioning boss, the nut 24 includes a threaded portion and a hole portion extending radially outward from the threaded portion, and the hole portion is provided with a positioning hole matched with the positioning boss. In order to reduce the space between the helical gear 23 and the nut 24, a key connection is not suitable. The helical gear 23 is formed by adopting a die, and a positioning convex column is directly processed during forming, so that the structure is simple, and the installation is convenient.

In other embodiments, the synchronous rotation structure between the helical gear and the nut may be: a first anti-rotation hole is formed in the bevel gear, a second anti-rotation hole is formed in the nut, and a positioning pin shaft is arranged in the first anti-rotation hole and the second anti-rotation hole.

In other embodiments, the helical gears may be replaced by worm gears.

In this embodiment, the frame 11 includes a frame body 111 and a frame cover 112 connected by a screw, the worm 22, the helical gear 23 and the nut 24 are located in the accommodating chamber, and the screw rod 25 passes through the accommodating chamber, that is, both ends of the screw rod 25 are exposed to the accommodating chamber.

In this embodiment, a bearing is further disposed in the accommodating chamber, and the bearing is sleeved outside the nut 24.

In this embodiment, the bearing is an angular contact bearing 6 to simultaneously take up axial and radial forces.

In other embodiments, both deep groove ball bearings and thrust bearings may be employed to simultaneously withstand both axial and radial forces.

In this embodiment, the worm 22 is located below the helical gear 23, and the output shaft of the motor 21 and the worm 22 are coaxially disposed.

In this embodiment, the frame 11 and the housing 12 are fixedly connected by screws; the motor 21 is mounted on the frame 11.

In this embodiment, the housing 12 includes left and right half shells, which are fixedly connected by screws.

In this embodiment, the control component 5 includes a circuit board, a power button and an operation switch, the power button can be pressed to turn on the power, and the operation of the motor 21 can drive the top wheel 31 to move forward and backward (or press) the operation switch.

In other embodiments, a handle may also be formed extending from the housing 12 to facilitate removal.

In this embodiment, the mold assembly 3 includes a top block 30 disposed on the screw rod 25, the top block 30 has an insertion portion, the insertion portion forms a first clamping portion, the top wheel 31 is provided with an insertion hole 313 inserted into the insertion portion and a clamping piece moving hole 314 communicated with the insertion hole 313, the mold assembly 3 further includes a clamping assembly, and the clamping assembly includes a movable clamping piece disposed in the clamping piece moving hole 314 and an elastic piece acting on the clamping piece.

In this embodiment, the elastic member is a compression spring, the first clamping portion is an annular groove, the clamping member moving hole 314 is a threaded hole, and the clamping component is a wave ball screw 34.

In this embodiment, the upper surface of the top wheel 31 has an angle indicator for indicating the bending angle.

In this embodiment, the angle indication mark includes an indication line 311 and an indication number 312, where the indication line 311 is a straight line, there are a plurality of indication lines 311, and extension lines of the plurality of indication lines 311 intersect at a point.

In this embodiment, a stress pipe groove is formed on the stress wheel 33, a fixed pipe groove is formed on the top wheel 31, the fixed pipe groove is matched with the stress pipe groove, and the stress pipe grooves are multiple and different in size.

In this embodiment, the force-receiving grooves are formed in all four directions of the force-receiving wheel 33.

In this embodiment, the first force-receiving pipe groove is located in the first direction, the second force-receiving pipe groove is located in the second direction, the third force-receiving pipe groove and the fourth force-receiving pipe groove are located in the third direction, and the fifth to seventh force-receiving pipe grooves are located in the fourth direction.

In this embodiment, the mold assembly 3 includes a wheel adjustment structure, which includes a wheel shaft 35 and a lower screw 36. The cross beam 32 is provided with a pair of long holes along the length direction; a pair of runner axles 35 are slidably disposed in the long holes, respectively, upper and lower ends of the runner axles 35 are exposed out of the long holes, the runner axles 35 have protrusions capable of abutting against the upper surface of the cross beam 32, and the lower ends of the runner axles 35 have external threads; a pair of stress wheels 33 are respectively and rotatably arranged on the rotating wheel shaft 35, and an axial gap is formed between each stress wheel 33 and the cross beam 32; the lower threaded part 36 is arranged below the cross beam 32, an internal thread is formed on the lower threaded part 36, and the lower threaded part 36 is in threaded connection with the rotating wheel shaft 35; the rotating wheel shaft 35 and the lower screw member 36 are spirally moved to switch the rotating wheel shaft 35 between a fixed position and a slidable position with respect to the cross member 32.

In the embodiment, the beam 32 is provided with a long hole, the stress wheel 33 can slide along the long hole along with the rotating wheel shaft 35, and the distance between the two stress wheels 33 can be adjusted in a stepless manner; an axial gap is formed between the stress wheel 33 and the cross beam 32, the stress wheel 33 can easily rotate relative to the rotating wheel shaft 35, so that the pipe bending is facilitated, meanwhile, the stress wheel 33 can easily rotate relative to the rotating wheel shaft 35, and the rotating wheel shaft 35 can not slide relative to the cross beam 32 during the pipe bending; the force bearing wheel 33 can rotate, so that the friction force during bending can be greatly reduced, and the bending can be realized with small force.

In this embodiment, the electric pipe bender includes a limit switch assembly and a protection switch assembly, the limit switch assembly includes a front limit switch and a rear limit switch disposed in the housing 12, and the protection switch includes a front protection switch and a rear protection switch disposed in the housing 12. When the current limit switch is triggered to indicate that the displacement of the top wheel 31 reaches the limit position, the motor 21 stops conveying the top wheel 31 forwards, when the rear limit switch is triggered to indicate that the top wheel 31 returns to the initial position, the motor 21 stops conveying the top wheel 31 backwards, normal operation in a stroke range is ensured, and the motor 21 can adopt a common motor 21; be equipped with the protection switch subassembly, when current limit switch breaks down, motor 21 can continue to drive the displacement of top wheel 31 forward segment and trigger preceding protection switch, motor 21 stops, when limit switch breaks down after, motor 21 can continue to drive the displacement of top wheel 31 backward segment and trigger back protection switch, motor 21 stops, thereby, even when preceding limit switch and back limit switch became invalid, through preceding protection switch and back protection switch, motor 21 also can in time stop, thereby effectively protect electric pipe bender.

The working process of the electric pipe bender of the embodiment is as follows: the method comprises the steps of firstly assembling an electric pipe bending machine, placing a pipe to be bent on two stress wheels 33, then turning on a power switch, pushing a control switch forwards, starting a motor 21, driving a top wheel 31 to move forwards through a worm 22, a bevel wheel 23, a nut 24 and a lead screw 25, gradually entering the pipe groove of the top wheel 31 and receiving the acting force from the top wheel 31 in the moving process of the top wheel 31, gradually bending the pipe to be bent to a required angle, pushing the control switch backwards after the bending is completed, reversely rotating the motor 21 to drive the top wheel 31 to retreat and reset, arranging a blanking part on a frame body 111 in the resetting process, and jacking the pipe to be bent from the top wheel 31 under the acting force from the blanking part. The angle of curvature or the stroke of the top wheel 31 can also be implemented as follows: if the pipe to be bent with a specific pipe diameter is required to be bent, the stroke of the screw rod 25 at a common bending angle of 90 degrees is calculated, the front limit switch and the rear limit switch are installed at corresponding positions, when the pipe to be bent with the specific pipe diameter is required to be bent by 90 degrees, the pipe bending machine runs corresponding programs by selecting the angle, the motor 21 is instructed to run, the screw rod 25 moves to the corresponding position, the front limit switch is triggered, and the motor 21 stops working.

In other embodiments, the angle of curvature or the travel of the top wheel 31 may also be implemented as follows: firstly, the strokes of the screw rods 25 corresponding to different pipe diameters and different bending angles are calculated, the strokes of the screw rods 25 are converted into the required operation time length or the required rotation number of turns of the motor 21 and stored in a controller, after the setting is finished, the corresponding pipe diameters and angles are selected, and the controller controls the required operation time length or the required rotation number of turns of the motor 21, so that the strokes of the screw rods 25 are ensured to meet the requirements.

The embodiment of the utility model provides an electronic bending machine's beneficial effect is: the driving device 2 adopts the helical gear 23 and the worm 22, so that the single-stage speed ratio is large, the running noise is low, and the vibration is small; the driving device 2 adopts a screw rod 25 and a nut 24 pair, so that the transmission efficiency is high; the whole structure is simple and compact; the gravity center distribution is reasonable, and the pipe bender is more stable; the frame body 111 is provided with a blanking part, and the pipe to be bent can be automatically jacked down from the jacking wheels 31; a safety protection switch is arranged to ensure safety; the stress wheel 33 can rotate, and the pipe can be bent by small force; the stress wheel 33 is provided with a plurality of stress pipe grooves, and the same stress wheel 33 can be suitable for various pipe diameters; an angle indicating structure is formed on the top wheel 31, so that the required angle can be conveniently processed.

While the invention has been described with reference to specific embodiments thereof, it will be understood by those skilled in the art that the invention is not limited thereto but is intended to cover all modifications and equivalents as may be included within the spirit and scope of the invention. Any modifications which do not depart from the functional and structural principles of the invention are intended to be included within the scope of the claims.

Claims

1. An electric pipe bender is characterized in that: the electronic bending machine includes:

the airplane body (1) comprises a frame (11) and a shell (12);

the driving device (2) comprises a motor (21) arranged on the rack (11), and a screw rod (25) and a nut (24) pair driven by the motor (21);

the die assembly (3) comprises a top wheel (31) which linearly reciprocates along with the screw rod (25), a cross beam (32) arranged on the rack (11) and two stress wheels (33) arranged on the cross beam (32), wherein the top wheel (31) is positioned between the two stress wheels (33);

a battery (4) for supplying power to the motor (21);

the control assembly (5) is arranged on the shell (12).

2. The motorized bender according to claim 1, wherein: the driving device (2) further comprises a worm (22) driven by the motor (21) to rotate and a bevel gear (23) matched with the worm (22), and the bevel gear (23) is fixedly connected with the nut (24).

3. The motorized bender according to claim 2, wherein: the helical gear (23) is integrally formed with a positioning convex column, the nut (24) comprises a threaded portion and a hole portion extending outwards from the threaded portion in the radial direction, and the hole portion is provided with a positioning hole matched with the positioning convex column.

4. The motorized bender according to claim 2, wherein: an accommodating chamber is formed on the frame (11), the bevel gear (23) and the nut (24) are positioned in the accommodating chamber, and the screw rod (25) penetrates through the accommodating chamber.

5. The motorized bender according to claim 4, wherein: and a bearing is further arranged in the accommodating cavity, the bearing is sleeved outside the nut (24) and is in contact with the helical gear (23), and the bearing is an angular contact bearing (6), or comprises a deep groove ball bearing and a thrust bearing.

6. The motorized bender according to claim 2, wherein: the worm (22) is positioned below the helical gear (23), and an output shaft of the motor (21) and the worm (22) are coaxially arranged; the motor (21) is arranged on the frame (11); the shell (12) extends to form a handle.

7. The motorized bender according to claim 1, wherein: the driving device (2) further comprises a worm (22) driven and rotated by the motor (21) and a worm wheel matched with the worm (22), a first anti-rotation hole is formed in the worm wheel, a second anti-rotation hole is formed in the nut (24), and a positioning pin shaft is arranged in the first anti-rotation hole and the second anti-rotation hole.

8. The electric bender according to claim 1, wherein: the die assembly (3) comprises a top block (30) connected with the screw rod (25) and the top wheel (31), the top block (30) is in threaded connection with the screw rod (25), the top block (30) is provided with an inserting part, a first clamping part is formed in the inserting part, an inserting hole (313) inserted by the inserting part and a clamping piece movable hole (314) communicated with the inserting hole (313) are formed in the top wheel (31), the die assembly (3) further comprises a clamping assembly, and the clamping assembly comprises a clamping piece movably arranged in the clamping piece movable hole (314) and an elastic piece acting on the clamping piece.

9. The motorized bender according to claim 8, wherein: the elastic piece is a compression spring, the first clamping portion is an annular groove, the clamping piece moving hole (314) is a threaded hole, and the clamping component is a wave ball screw (34).

10. The motorized bender according to claim 1, wherein: the upper surface of top wheel (31) has the angle instruction sign that is used for instructing the angle of buckling, angle instruction sign includes indicating line (311) and instruction digit (312), indicating line (311) are the straight line, indicating line (311) have many, many the extension line of indicating line (311) intersects in a point.