CN210907534U

CN210907534U - Automatic bending device for chassis pipe of handcart

Info

Publication number: CN210907534U
Application number: CN201922117519.9U
Authority: CN
Inventors: 张志刚
Original assignee: Suzhou Hammers Exhibition Equipment Co ltd
Current assignee: Suzhou Hammers Exhibition Equipment Co ltd
Priority date: 2019-12-02
Filing date: 2019-12-02
Publication date: 2020-07-03
Anticipated expiration: 2029-12-02

Abstract

The utility model discloses a handcart chassis pipe automatic bending device, include: mounting a plate; the pressing mechanism is arranged on the mounting plate and used for pressing the part to be bent of the underframe pipe along the direction vertical to the underframe pipe; the rotary bending mechanism is arranged on the mounting plate and used for supporting the chassis tube and driving two ends of the chassis tube to rotate towards the abutting mechanism respectively so as to bend the chassis tube; the two pressing and holding mechanisms are arranged on the rotary bending mechanism and are respectively used for pressing and fixing two ends of the underframe pipe; two positioning mechanism, set up on the mounting panel and relative the setting be in rotatory bending mechanism's the left and right sides is used for the top to support the both ends of chassis pipe are in order to incite somebody to action chassis pipe location. The utility model discloses a handcart chassis pipe automatic bending device can buckle the chassis pipe automatically, bends efficiently, the precision is high, effectual.

Description

Automatic bending device for chassis pipe of handcart

Technical Field

The utility model relates to a handcart technical field especially relates to a handcart chassis pipe automatic bending device.

Background

At present, with the development of society, the handcart can be seen everywhere in a supermarket. The trolley comprises a chassis, and the chassis is generally formed by welding a chassis pipe, a front connecting rod, a rear connecting pipe and a connecting plate. The underframe pipe is a bent pipe, the steel pipe is bent to form the underframe pipe by manually utilizing a bending die in the prior art, and the underframe pipe is bent manually, so that the working efficiency is low, the bending precision is low, and the bending effect is poor.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a handcart chassis pipe automatic bending device can buckle the chassis pipe automatically, bends efficiently, the precision is high, effectual.

In order to solve the technical problem, the utility model discloses a technical scheme provide a handcart chassis pipe automatic bending device, include:

mounting a plate;

the pressing mechanism is arranged on the mounting plate and used for pressing the part to be bent of the underframe pipe along the direction vertical to the underframe pipe;

the rotary bending mechanism is arranged on the mounting plate and used for supporting the chassis tube and driving two ends of the chassis tube to rotate towards the abutting mechanism respectively so as to bend the chassis tube;

the two pressing and holding mechanisms are arranged on the rotary bending mechanism and are respectively used for pressing and fixing two ends of the underframe pipe;

two positioning mechanism, set up on the mounting panel and relative the setting be in rotatory bending mechanism's the left and right sides is used for the top to support the both ends of chassis pipe are in order to incite somebody to action chassis pipe location.

In a specific embodiment of the present invention, the rotary bending mechanism includes:

the first rotating and bending assembly comprises a first rotating plate, a first supporting plate and a first driving assembly, and the first supporting plate is arranged on the first rotating plate and used for supporting one end of the underframe pipe; the first driving assembly is connected with one end of the first rotating plate, which is close to the part to be bent of the underframe pipe, and the other end of the first rotating plate is provided with the pressing mechanism;

the second rotary bending assembly comprises a second rotary plate, a second supporting plate and a second driving assembly, and the second supporting plate is arranged on the second rotary plate and used for supporting the other end of the underframe pipe; the second driving assembly is connected with one end of the second rotating plate, which is close to the part to be bent of the underframe pipe, and the other end of the second rotating plate is provided with the pressing mechanism;

the first driving assembly and the second driving assembly can respectively drive the first rotating plate and the second rotating plate to rotate around the same rotating central line, so that two ends of the underframe pipe bend towards the pressing mechanism respectively.

In a specific embodiment of the present invention, the first driving assembly includes a first motor and a hollow first rotating shaft, the first rotating shaft is rotatably disposed on the mounting plate, one end of the first rotating shaft is connected to the first rotating plate, and the other end of the first rotating shaft passes through the mounting plate and is in transmission connection with the first motor; the second driving assembly comprises a second motor and a second rotating shaft, the second rotating shaft is rotatably arranged in the first rotating shaft, one end of the second rotating shaft is connected with the second rotating plate, and the other end of the second rotating shaft penetrates through the first rotating shaft and is in transmission connection with the second motor.

In a specific embodiment of the present invention, the first motor is disposed on a first motor base, the first motor base is disposed at the bottom of the mounting plate, and a driving end of the first motor is provided with a driving wheel; a driven wheel is arranged on the first rotating shaft, and a synchronous belt is connected between the driving wheel and the driven wheel; the second motor sets up on the second motor cabinet, the second motor cabinet sets up the bottom of mounting panel, the drive end of second motor pass through the shaft coupling with the second rotating shaft is connected.

In an embodiment of the present invention, the first supporting plate and the second supporting plate are provided with first grooves on their upper surfaces, the first grooves are semi-cylindrical, and the first grooves are disposed along the length direction of the chassis tube.

The utility model discloses an in a specific embodiment, support and press the mechanism including supporting the motor, support and press the lead screw, support and press the slide and support the pinch roller, support the drive end of motor with support and press the lead screw to connect, support and press the cooperation on the lead screw to be provided with and support and press screw-nut, support and press screw-nut with support and press the slide to connect, support and press to rotate on the slide and be provided with support the pinch roller.

In a specific embodiment of the present invention, an annular groove is provided on the circumferential surface of the pressing wheel, and the cross section of the annular groove is a semicircle.

In a specific embodiment of the present invention, the pressing mechanism includes:

a pressing cylinder fixing seat;

the pressing cylinder is arranged on the pressing cylinder fixing seat;

the pressing block is arranged at the driving end of the pressing cylinder, and the pressing cylinder can drive the pressing block to move towards the direction of the underframe pipe so as to press, hold and fix the underframe pipe.

In a specific embodiment of the present invention, the positioning mechanism includes:

positioning a driving piece;

the positioning block is arranged at the driving end of the positioning driving piece, and the positioning driving piece can drive the positioning block to move towards the direction of the chassis pipe so as to position the chassis pipe along the length direction of the chassis pipe.

In a specific embodiment of the present invention, the positioning block includes:

the connecting part is connected with the driving end of the positioning driving part;

the positioning portion is in a round table shape and comprises a large end and a small end which are arranged oppositely, the large end is connected with the connecting portion, and the positioning portion and the underframe pipe are coaxially arranged.

The utility model discloses an useful part lies in:

different from the prior art, the technical scheme of the utility model is applied, when in use, the chassis tube is firstly placed on the rotary bending mechanism, and then the two positioning mechanisms act to position the chassis tube; after the underframe pipe is positioned, the two pressing and holding mechanisms respectively press and hold two ends of the fixed underframe pipe; then, the pressing mechanism presses the part to be bent of the chassis tube, and the two positioning mechanisms release the two ends of the chassis tube; the rotary bending mechanism drives two ends of the underframe pipe to respectively rotate towards the abutting mechanism so as to bend the underframe pipe. The utility model discloses a handcart chassis pipe automatic bending device can buckle the chassis pipe automatically, bends efficiently, the precision is high, effectual.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic structural view showing the positioning state of the automatic bending device for the bottom tube of the cart of the present invention;

FIG. 2 is a schematic structural view showing the bending state of the automatic bending device for the bottom tube of the cart of the present invention;

FIG. 3 is a schematic structural view of the rotary bending mechanism of the automatic bending device for the bottom tube of the cart of the present invention;

FIG. 4 is a schematic structural view of the pressing mechanism of the automatic bending device for the bottom tube of the cart of the present invention;

FIG. 5 is a schematic structural view of the pressing mechanism of the automatic bending device for the cart chassis pipe of the present invention;

fig. 6 is a schematic structural view of the positioning mechanism of the automatic bending device for the cart chassis pipe of the present invention.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1-6, the embodiment of the automatic bending device for the bottom tube of the cart of the present invention comprises: the mounting plate 10, the abutting mechanism 20, the rotary bending mechanism, the pressing mechanism 60 and the positioning mechanism 50. The abutting mechanism 20 is arranged on the mounting plate 10 and used for abutting against the part to be bent of the chassis tube along the direction perpendicular to the chassis tube. The rotary bending mechanism is disposed on the mounting plate 10, and is used for supporting the chassis tube and driving two ends of the chassis tube to rotate towards the pressing mechanism 20 respectively so as to bend the chassis tube. And two pressing and holding mechanisms 60 arranged on the rotary bending mechanism and respectively used for pressing and holding two ends of the fixed underframe pipe. And the two positioning mechanisms 50 are arranged on the mounting plate 10 and are oppositely arranged at the left side and the right side of the rotary bending mechanism, and are used for abutting against two ends of the underframe pipe so as to position the underframe pipe.

By applying the technical scheme of the embodiment, when in use, the underframe pipe is firstly placed on the rotary bending mechanism, and then the two positioning mechanisms 50 act to position the underframe pipe; after the chassis tube is positioned, the two pressing mechanisms 60 respectively press and fix the two ends of the chassis tube; then, the pressing mechanism 20 presses the to-be-bent part of the chassis tube, and the two positioning mechanisms 50 release the two ends of the chassis tube; the rotary bending mechanism drives two ends of the chassis tube to rotate towards the pressing mechanism 20 respectively so as to bend the chassis tube. The automatic handcart chassis pipe bending device can automatically bend chassis pipes, and is high in bending efficiency, high in precision and good in effect.

In one embodiment, the rotary bending mechanism comprises a first rotary bending assembly 30 and a second rotary bending assembly 40, the first rotary bending assembly 30 comprises a first rotating plate 31, a first supporting plate 32 and a first driving assembly 33, the first supporting plate 32 is disposed on the first rotating plate 31 for supporting one end of the bobbin; the first driving assembly 33 is connected to one end of the first rotating plate 31 close to the to-be-bent portion of the chassis tube, and the other end of the first rotating plate 31 is provided with a pressing mechanism 60. The second rotating and bending assembly 40 comprises a second rotating plate 41, a second supporting plate 42 and a second driving assembly 43, wherein the second supporting plate 42 is arranged on the second rotating plate 41 and is used for supporting the other end of the underframe pipe; the second driving assembly 43 is connected to one end of the second rotating plate 41 close to the to-be-bent portion of the chassis tube, and the other end of the second rotating plate 41 is provided with a pressing mechanism 60. The first driving assembly 33 and the second driving assembly 43 can respectively drive the first rotating plate 31 and the second rotating plate 41 to rotate around the same rotation center line, so that the two ends of the chassis tube are respectively bent towards the pressing mechanism 20. The first driving assembly 33 is connected with the first rotating plate 31, the second driving assembly 43 is connected with the second rotating plate 41, two ends of the chassis pipe are respectively fixed on the first rotating plate 31 and the second rotating plate 41, the first driving assembly 33 and the second driving assembly 43 can respectively drive the first rotating plate 31 and the second rotating plate 41 to rotate around the same rotating central line, so that two ends of the chassis pipe can be respectively bent towards the abutting mechanism 20, the rotating angles of the first rotating plate 31 and the second rotating plate 41 can be controlled through the first driving assembly 33 and the second driving assembly 43, the bending angle of the chassis pipe can be further accurately controlled, and the bending precision of the chassis pipe is high.

In one embodiment, the first driving assembly 33 includes a first motor 331 and a hollow first rotating shaft 336, the first rotating shaft 336 is rotatably disposed on the mounting plate 10, one end (upper end in fig. 3) of the first rotating shaft 336 is connected to the first rotating plate 31, and the other end (lower end in fig. 3) of the first rotating shaft 336 passes through the mounting plate 10 and is drivingly connected to the first motor 331. The second driving assembly 43 includes a second motor 431 and a second rotating shaft 434, the second rotating shaft 434 is rotatably disposed in the first rotating shaft 336, one end (upper end in fig. 3) of the second rotating shaft 434 is connected to the second rotating plate 41, and the other end (lower end in fig. 3) of the second rotating shaft 434 is drivingly connected to the second motor 431 through the first rotating shaft 336. Thus, the first motor 331 can separately drive the first rotation shaft 336 to rotate, the second motor 431 can separately drive the second rotation shaft 434 to rotate, and the second rotation shaft 434 is rotatably provided in the first rotation shaft 336 such that the second rotation shaft 434 and the first rotation shaft 336 are coaxially provided. Through the first motor 331 and the second motor 431, the bending speed is high, and the bending efficiency can be improved.

Further, the first motor 331 is arranged on the first motor base 332, the first motor base 332 is arranged at the bottom of the mounting plate 10, and a driving wheel 333 is arranged at the driving end of the first motor 331; a driven pulley 335 is provided on the first rotary shaft 336, and a timing belt 334 is connected between the driving pulley 333 and the driven pulley 335. Therefore, the first motor 331 can drive the driving wheel 333 to rotate and drive the driven wheel 335 to rotate, and further drive the first rotating shaft 336 to rotate.

Further, the second motor 431 is disposed on a second motor base 432, the second motor base 432 is disposed at the bottom of the mounting plate 10, and a driving end of the second motor 431 is connected to the second rotating shaft 434 through a coupling 433. Thereby, the second motor 431 can drive the second rotation shaft 434 to rotate.

Further, the mounting plate 10 is provided with a rotation support 11, and the first rotation shaft 336 is rotatably provided in the rotation support 11. The second rotating shaft 434 is rotatably disposed in the first rotating shaft 336 through a bearing 435. By providing the rotation support base 11 and the bearing 435, the rotation of the first and

second rotation shafts

336 and 434 is more smooth.

In one embodiment, the upper surfaces of the first support plate 32 and the second support plate 42 are each provided with a first groove, the first groove is semi-cylindrical, the first groove extends along the length direction (left-right direction in fig. 1 and 3) of the chassis tube, and preferably, the diameter of the first groove is equal to the outer diameter of the chassis tube. Through setting up first recess, the both ends of chassis pipe can partly holding respectively in first recess for the position of chassis pipe can be preliminary fixed a position.

In one embodiment, the first rotating plate 31 and the second rotating plate 41 are fan-shaped, and the center of the fan-shaped circle is located on the rotation center line of the first rotating shaft 336 or the second rotating shaft 434.

In an embodiment, the first slider 35 is disposed at the bottom of the first rotating plate 31, and the first slider 35 is located at an end of the first rotating plate 31 away from the first rotating shaft 336; the first slide block 35 is slidably disposed on the first slide rail 34, and the first slide rail 34 is disposed on the mounting plate 10. The first slide rail 34 is arc-shaped, and the center of the first slide rail 34 is located on the rotation center line of the first rotation shaft 336. By providing the first slide rail 34 and the first slider 35, the movement of the first rotating plate 31 can be supported and guided.

In an embodiment, the bottom of the second rotating plate 41 is provided with a second slider 45, and the second slider 45 is located at an end of the second rotating plate 41 away from the second rotating shaft 434; the second slide block 45 is slidably disposed on the second slide rail 44, and the second slide rail 44 is disposed on the mounting plate 10. The second slide rail 44 has an arc shape, and the center of the second slide rail 44 is located on the rotation center line of the second rotation shaft 434. By providing the second slide rail 44 and the second slider 45, the movement of the second rotating plate 41 can be supported and guided.

In an embodiment, a support assembly 70 is disposed on the mounting plate 10, the support assembly 70 is used for supporting the first rotating plate 31 and the second rotating plate 41, the support assembly 70 includes a roller bracket 72 and a roller 71 rotatably disposed on the roller bracket 72, the roller bracket 72 is disposed on the mounting plate 10, and the roller 71 is supported by the bottom of the first rotating plate 31 and the bottom of the second rotating plate 41. By providing the support assembly 70 supported on the bottom of the first rotating plate 31 and the second rotating plate 41 and using the rollers 71 to abut against and support the first rotating plate 31 and the second rotating plate 41, the first rotating plate 31 and the second rotating plate 41 can be supported without affecting the rotation of the first rotating plate 31 and the second rotating plate 41.

In an embodiment, the pressing mechanism 20 includes a pressing motor 21, a pressing screw 25, a pressing slide 28 and a pressing wheel 29, a driving end of the pressing motor 21 is connected to the pressing screw 25, a pressing screw nut (not shown) is disposed on the pressing screw 25 in a matching manner, the pressing screw nut is connected to the pressing slide 28, and the pressing wheel 29 is rotatably disposed on the pressing slide 28. Specifically, the pressing motor 21 is arranged on the mounting plate 10 through the pressing motor base 22, the driving end of the pressing motor 21 is connected with one end of a pressing screw rod 25 through a pressing coupler 23, the pressing screw rod 25 is rotatably arranged on a pressing screw rod support 24, and the pressing screw rod support 24 is arranged on the mounting plate 10. Therefore, the pressing motor 21 can drive the pressing screw 25 to rotate to drive the pressing screw nut and the pressing slide 28 to move along the direction perpendicular to the chassis tube so as to press the portion to be bent of the sidewall of the chassis tube.

Further, the left and right sides of the pressing slider 28 are slidably connected to the mounting plate 10 through the pressing slider 27, respectively. The pressing sliding assembly 27 comprises a pressing sliding rail 271 and a pressing sliding block 272, the pressing sliding rail 271 is arranged on the pressing sliding rail mounting seat 26, and the pressing sliding rail mounting seat 26 is arranged on the mounting plate 10; the pressing slide block 272 is slidably disposed on the pressing slide rail 271, and the pressing slide block 272 is connected to the pressing slide 28. By providing the pressing slide assembly 27, the movement of the pressing slide 28 is more smooth.

Further, an annular groove is arranged on the circumferential surface of the pressing wheel 29, the section of the annular groove is a semicircle, and preferably, the diameter of the semicircle is equal to the outer diameter of the chassis pipe. Through setting up the annular groove, can be with chassis pipe card in the annular groove for the chassis pipe is difficult to break away from in the bending process and supports pinch roller 29.

In one embodiment, the pressing mechanism 60 includes a pressing cylinder 61, a pressing cylinder fixing base 62 and a pressing block 65. The pressure cylinder fixing base 62 is provided on the first rotating plate 31 and the second rotating plate 41. The pressure cylinder 61 is arranged on the pressure cylinder fixing seat 62. The pressing block 65 is arranged at the driving end of the pressing cylinder 61, and the pressing cylinder 61 can drive the pressing block 65 to move towards the direction of the chassis pipe so as to press and fix the chassis pipe.

Further, the pressing block 65 is arranged on the pressing slide block 64, the pressing slide block 64 is arranged on the pressing slide rail 63 in a sliding manner, and the pressing slide rail 63 is arranged on the pressing cylinder fixing seat 62. By arranging the pressing slide block 64 and the pressing slide rail 63, the movement of the pressing block 65 is more stable.

Further, one side of briquetting 65 towards the chassis pipe is provided with the second recess, and the second recess is the semi-cylinder, and the second recess extends the setting along the length direction of chassis pipe, and preferably, the diameter of second recess equals with the external diameter of chassis pipe. By providing the second groove and cooperating with the first groove, the chassis tube can be more firmly fixed.

Further, the second groove and the first groove are smooth surfaces. In the process of bending the underframe pipe, when the underframe pipe deforms due to internal stress, the two ends of the underframe pipe can slightly slide between the first support plate 32 and the pressing block 65 and between the second support plate 42 and the pressing block 65.

In an embodiment, the positioning mechanism 50 includes a positioning cylinder 51 and a positioning block 54, the positioning block 54 is disposed at a driving end of the positioning cylinder 51, and the positioning cylinder 51 can drive the positioning block 54 to move towards the direction of the chassis tube to position the chassis tube along the length direction of the chassis tube, so that the portion of the chassis tube to be bent is opposite to the pressing wheel 29 of the pressing mechanism 20, and the pressing position of the pressing mechanism 20 is ensured to be accurate. This improves the accuracy and effect of bending.

In another embodiment, the positioning mechanism 50 includes a positioning motor, a positioning screw and a positioning block 54, the positioning motor is disposed on the mounting plate 10 through a positioning motor base, a driving end of the positioning motor is connected to one end of the positioning screw through a positioning coupling, the positioning screw is rotatably disposed on a positioning screw support, the positioning screw support is disposed on the mounting plate 10, a positioning screw nut is disposed on the positioning screw, and the positioning screw nut is connected to the positioning block 54. Therefore, the positioning motor can drive the positioning screw rod to rotate to drive the positioning screw rod nut and the positioning block 54 to move. By adopting the positioning motor, the moving stroke of the positioning block 54 is controllable, so that the positioning mechanism 50 is suitable for positioning the chassis pipes with different lengths or the chassis pipes with the same length but different bending positions.

Further, the positioning block 54 includes a connecting portion and a positioning portion, the connecting portion is connected with the driving end of the positioning cylinder 51 or connected with the positioning screw nut; the positioning part is in a round table shape and comprises a large end and a small end which are arranged oppositely, the large end is connected with the connecting part, and the positioning part and the underframe pipe are coaxially arranged. The two ends of the underframe pipe are propped against the two ends of the underframe pipe through the truncated cone-shaped positioning parts, so that at least part of the positioning parts extend into the inner cavity of the underframe pipe, and the positioning parts and the underframe pipe are coaxially arranged, so that the underframe pipe can be positioned more stably. In addition, the positioning device can also be suitable for positioning the underframe pipes with different diameters.

Further, the positioning block 54 is disposed on the positioning slider 53, the positioning slider 53 is slidably disposed on the positioning slide rail 52, and the positioning slide rail 52 is disposed on the mounting plate 10. Through setting up location slide rail 52 and location slider 53, the motion of locating piece 54 is more steady, can guarantee that the location portion and the chassis pipe of locating piece 54 are coaxial, do not produce the skew.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.

Claims

1. A cart undercarriage tube auto-bending device, comprising:

mounting a plate;

2. A cart undercarriage tube auto-bending device according to claim 1, wherein said rotary bending mechanism comprises:

3. A stroller chassis tube automatic bending apparatus according to claim 2, wherein said first driving assembly comprises a first motor and a hollow first rotating shaft, said first rotating shaft is rotatably disposed on said mounting plate, one end of said first rotating shaft is connected to said first rotating plate, and the other end of said first rotating shaft is drivingly connected to said first motor through said mounting plate; the second driving assembly comprises a second motor and a second rotating shaft, the second rotating shaft is rotatably arranged in the first rotating shaft, one end of the second rotating shaft is connected with the second rotating plate, and the other end of the second rotating shaft penetrates through the first rotating shaft and is in transmission connection with the second motor.

4. A cart chassis tube auto-bending device according to claim 3, wherein the first motor is provided on a first motor mount provided at the bottom of the mounting plate, the drive end of the first motor being provided with a drive wheel; a driven wheel is arranged on the first rotating shaft, and a synchronous belt is connected between the driving wheel and the driven wheel; the second motor sets up on the second motor cabinet, the second motor cabinet sets up the bottom of mounting panel, the drive end of second motor pass through the shaft coupling with the second rotating shaft is connected.

5. A stroller chassis tube automatic bending device according to claim 2, wherein the upper surfaces of the first support plate and the second support plate are each provided with a first groove, the first groove is semi-cylindrical, and the first groove extends along the length direction of the chassis tube.

6. The automatic pipe bending device for the underframe of a trolley according to claim 1, wherein the pressing mechanism comprises a pressing motor, a pressing screw rod, a pressing slide and a pressing wheel, the driving end of the pressing motor is connected with the pressing screw rod, a pressing screw rod nut is fittingly arranged on the pressing screw rod and connected with the pressing slide, and the pressing wheel is rotatably arranged on the pressing slide.

7. A trolley chassis tube auto-bending device according to claim 6, characterized in that the circumferential surface of the pressing wheel is provided with an annular groove, the section of which is semicircular.

8. A cart undercarriage tube auto-bending device according to claim 1, wherein said hold down mechanism comprises:

a pressing cylinder fixing seat;

the pressing cylinder is arranged on the pressing cylinder fixing seat;

9. A cart undercarriage tube auto-bending device according to claim 1, wherein said positioning mechanism comprises:

positioning a driving piece;

10. A cart undercarriage tube auto-bending apparatus according to claim 9, wherein said locating block comprises: