CN210792114U

CN210792114U - Driving mechanism of plastic welding machine and plastic welding machine

Info

Publication number: CN210792114U
Application number: CN201920815182.6U
Authority: CN
Inventors: 李云辉; 陈章强
Original assignee: Branson Ultrasonics Shanghai Co Ltd
Current assignee: Branson Ultrasonics Shanghai Co Ltd
Priority date: 2019-05-31
Filing date: 2019-05-31
Publication date: 2020-06-19
Anticipated expiration: 2029-05-31

Abstract

The utility model discloses an actuating mechanism and plastics welding machine of plastics welding machine, the actuating mechanism of one of them plastics welding machine, including first elevating platform and second elevating platform, still include: a first lifting structure; a second lifting structure; a first drive structure; a second drive structure, the second drive structure comprising: at least one second drive shaft, and second drive means, and at least one second ball screw, and at least one second vertical nut block. The utility model discloses a setting of the actuating mechanism of plastics welding machine for its upper and lower welding part is more even at the pressfitting height ratio after last bed die compound die, and the part is behind the compound die under the flexible construction can not appear, some local pressfittings, and some places do not have the situation of pressfitting, thereby improve the final welding quality of product greatly, reduce the welding defective rate, vibrate for a short time, strike for a short time at the elevating platform lift in-process simultaneously, do not have the noise.

Description

Driving mechanism of plastic welding machine and plastic welding machine

Technical Field

The utility model relates to a welding machine technical field especially relates to a actuating mechanism and plastics welding machine of plastics welding machine.

Background

Plastic welding refers to a joining method in which two plastic parts are joined into a single body by melting the contact surfaces of the two plastic parts simultaneously by heating, and is only suitable for thermoplastic joining. In the existing plastic welding process, the common plastic welding modes mostly include the following two types, one is the process that welding materials are contacted to generate heat so as to finish welding, such as an ultrasonic plastic welding mode, the method adopts low-amplitude and high-frequency (ultrasonic) vibration energy to enable the surface and molecules to generate heat required for welding connected pad plastic parts by friction, and then the welding process is finished; another is a non-contact heating process of welding materials, such as hot plate welding, infrared welding, etc., which is a thermoplastic welding process in which an electrically heated metal mold is contacted with a connected plastic part or an infrared radiator is used to radiatively heat without contacting the connected plastic part, thereby softening the surface of the connected plastic part, and is widely used because it is applicable to all large or small thermoplastic parts.

In the prior art, a common hot plate welding device and an infrared welding device are similar in structure, please refer to fig. 1, the whole machine is in a frame form and is composed of three large plates, namely an upper die 1, a lower die 2 and a hot die plate (not shown in the figure), components to be welded are fixed on the upper die plate 1 and the lower die plate 2 during welding, the components to be welded are simultaneously heated through the hot die plate, then the hot die plate is removed, and the components to be welded are in contact welding through pressing the upper die plate 1 and the lower die plate 2. The upper template 1 and the lower template 2 are fixed on the frame by an active driving mechanism and can vertically lift relative to the frame. Wherein, initiative actuating mechanism includes: a servo motor (not shown), a reduction gearbox 3, a synchronous toothed transmission chain 4, a main drive shaft 5 and a guide slide rail 6. A servo motor (not shown in the figure) drives a reduction gearbox 3, an output shaft of the reduction gearbox 3 drives a main driving shaft to rotate 5, synchronous tooth-shaped chain wheels 7 at two ends of the main driving shaft 5 drive tooth-shaped chains meshed with the main driving shaft to move in the vertical direction, and two ends of a lifting platform are connected with the tooth-shaped chains, so that the tooth-shaped chains drive the lifting platform to move in the vertical direction under the guidance of a sliding rail.

However, the active driving mechanism of the prior art described above has found at least the following technical problems during use:

1) the toothed chain transmission has the advantages of complex structure, difficult assembly and disassembly, higher cost, heavier weight of the toothed chain and higher requirements on installation and maintenance;

2) the chain is easy to extend, the chain of the upper template can be loosened under the condition that the two synchronous chain transmission driving lifting tables are mutually pressurized, and the loosening phenomenon is more obvious when the pressure is higher; sometimes, the phenomenon that the chain is tightened and loosened occurs, so that the pressing is uneven in the welding process;

3) the existing active driving mechanism is usually good in effect when dealing with a small-sized weldment, but is often poor in effect when dealing with a large-sized weldment, namely, the pressing efficiency is low, and in the process of up-and-down movement, the movement is uneven, and the welding efficiency is low.

Therefore, there is a need to provide a driving mechanism of a plastic welding machine and a plastic welding machine, so as to solve the above problems.

SUMMERY OF THE UTILITY MODEL

For solving the technical problem, the utility model provides a actuating mechanism and plastics welding machine of plastics welding machine, its synchronous motion uniformity is good, during the great weldment of machining dimension, can ensure elevating platform pressfitting effect, welding quality is high.

The utility model provides a drive mechanism of plastic welding machine, including first elevating platform 100 and second elevating platform 200, treat when using that the welding piece is arranged in between first elevating platform 100 and second elevating platform 200, staff's operation hot plate, drive block (the hot plate can be the metal hot plate, also can be infrared radiation ware, this application does not do not limit here, hot plate, drive block all are common among the prior art, and its connected mode heating principle refers to prior art) heats the face of weld of treating the welding piece (the heating can be contact heating, also can be radiant heating), puts aside hot plate, drive block afterwards, makes first elevating platform 100 and second elevating platform 200 are relative motion on the vertical direction, will treat that the welding piece pressfitting welds. The driving mechanism of the plastic welding machine further comprises:

the first lifting structure is matched with the side end of the first lifting platform 100, so that the first lifting platform 100 can be lifted and lowered in the vertical direction relative to the first lifting structure, and it should be noted here that the first lifting structure is used for ensuring that the first lifting platform 100 can move in the vertical direction under the action of the first driving structure, the first lifting structure may be a sliding groove, a sliding groove is arranged on the rack, a sliding shoe is arranged on the side surface of the first lifting platform 100, and the sliding shoe is matched with the sliding groove to slide; the lifting rod can be used, one end of the lifting rod is connected with the rack, the other end of the lifting rod is fixedly connected with the side end of the first lifting platform 100, and a person skilled in the art can select the lifting rod according to requirements; and

a second lifting structure, which is matched with the side end of the second lifting platform 200 so that the second lifting platform 200 can lift in the vertical direction relative to the second lifting structure, and it should be noted here that the second lifting structure is used to ensure that the second lifting platform 200 can move in the vertical direction under the action of the second driving structure, the second lifting structure may be a chute, a chute is arranged on the frame, a sliding shoe is arranged on the side surface of the second lifting platform 200, and the sliding shoe is matched with the chute to slide; one end of the lifting rod can be connected with the rack, and the other end of the lifting rod is fixedly connected with the side end of the second lifting platform 200, so that a person skilled in the art can select the lifting rod according to the requirement; and

the first driving structure is matched with the side end of the first lifting platform 100 and used for driving the first lifting structure to lift in the vertical direction, and the first driving structure comprises:

a first driving shaft 401, the first driving shaft 401 is located above the first lifting structure, reversing elements 4011 are disposed at two ends of the first driving shaft 401, it should be noted that the reversing elements 4011 are used for connecting the first driving shaft 401 and the first ball screw 402 in a transmission manner, the first driving shaft 401 rotates around the axis thereof in the horizontal direction, the first ball screw 402 is driven to rotate around the axis thereof in the vertical direction, and

a first driving means for driving the first driving shaft 401 to rotate, wherein the first driving means includes a rotary power source (preferably a motor, an electric motor, etc.) which is in transmission connection with the first driving shaft 401 to drive the first driving shaft 401 to rotate, and

at least one first ball screw 402, one end of the first ball screw 402 being engaged with the direction changing member 4011 so that the first ball screw 402 is rotated by the first drive shaft 401 through the direction changing member 4011, and

the first ball screw 402 penetrates through the first vertical nut seat 403 and is in threaded fit with the first vertical nut seat 403, the side end of the first vertical nut seat 403 is fixedly connected with the side end of the first lifting platform 100, and in the rotating process of the first ball screw 402, the first vertical nut seat 403 drives the first lifting platform 100 to move up and down in the vertical direction; and

the second driving structure, this second driving structure and the 200 side end cooperation of second elevating platform for drive second elevating structure goes up and down in vertical direction, second driving structure include:

a second driving shaft 411, the second driving shaft 411 is located below the second lifting structure, reversing elements 4011 are disposed at two ends of the second driving shaft 411, it should be noted here that the reversing elements 4011 are used for connecting the second driving shaft 411 with the second ball screw 412 in a transmission manner, the second driving shaft 411 rotates around its axis in the horizontal direction, and drives the second ball screw 412 to rotate around its axis in the vertical direction, where the structures of the reversing elements 4011 and the reversing elements 4011 of the first driving shaft 401 may be the same, and

a second driving means for driving the second driving shaft 411 to rotate, wherein the second driving means comprises a rotary power source (preferably a motor, an electric motor, etc.) which is in transmission connection with the second driving shaft 411 to drive the second driving shaft 411 to rotate, and

at least one second ball screw 412, one end of the second ball screw 412 being engaged with the direction changing element 4011, so that the second ball screw 412 is rotated by the second drive shaft 411 through the direction changing element 4011, and

and the second ball screw 412 penetrates through the second vertical nut seat 413 and is in threaded fit with the second vertical nut seat 413, the side end of the second vertical nut seat 413 is fixedly connected with the side end of the second lifting platform 200, and in the rotating process of the second ball screw 412, the second vertical nut seat 413 drives the second lifting platform 200 to move up and down in the vertical direction.

In a preferred embodiment, the first lifting structure comprises:

at least one first lifting unit, the first lifting unit comprising:

a first side plate 3011; and

the first sliding rail 3012 is concavely disposed on the first side plate 3011 close to the first lifting platform 100; and

one end of the first sliding shoe is fixedly connected with the side end of the first lifting platform 100, and the other end of the first sliding shoe is matched with the first sliding rail 3012, and the first sliding shoe can slide relatively in the first sliding rail 3012.

In an embodiment of the present invention, when one first lifting unit is provided, one side end of the first lifting platform 100 is fixedly connected to a first sliding shoe, and the first sliding shoe is engaged with the first sliding rail 3012; the other side end is fixedly connected with a first vertical type nut seat 403 of the first driving means, and the first vertical type nut seat 403 is matched with the first ball screw 402; thereby ensuring that the first elevating stage 100 is stable during the elevating process.

In another embodiment of the present invention, when two first lifting units are provided, the first lifting units are symmetrically disposed at both sides of the first lifting platform 100.

In a preferred embodiment, the second lifting structure comprises:

at least one second lifting unit, the second lifting unit comprising:

a second side plate 3021; and

a second slide rail 3022, the second slide rail 3022 is concavely disposed on the second side plate 3021 near the second lifting platform 200; and

one end of the second sliding shoe is fixedly connected with the side end of the second lifting platform 200, the other end of the second sliding shoe is matched with the second sliding rail 3022, and the second sliding shoe can slide relatively in the second sliding rail 3022;

in an embodiment of the present invention, when one second lifting unit is provided, one side end of the second lifting platform 200 is fixedly connected to the second sliding shoe, and the second sliding shoe is engaged with the second sliding rail 3022; the other side end is fixedly connected with a second vertical type nut seat 413 of the second driving means, and the second vertical type nut seat 413 is matched with a second ball screw 412; thereby ensuring that the second elevating stage 200 is stabilized during the elevating process.

In another embodiment of the present invention, when two second lifting units are provided, the second lifting units are symmetrically disposed at both sides of the second lifting platform 200.

Further, the first driving means comprises:

the first power unit 500, the first power unit 500 is preferably a motor or an electric machine; and

a first driving wheel 501, a first driving shaft 401 penetrates the axle center of the first driving wheel 501, and the first driving wheel 501 is in transmission connection with the first power unit 500.

Preferably, the first power unit 500 is a servo motor, and a belt pulley arranged on a power output shaft of the servo motor is in transmission connection with the first driving wheel 501 through a belt.

Further, the second driving means comprises:

a second power unit; and

and a second driving wheel 511, wherein a second driving shaft 411 penetrates through the axle center of the second driving wheel 511, and the second driving wheel 511 is in transmission connection with a second power unit.

Preferably, the second power unit is a servo motor, and a belt pulley arranged on a power output shaft of the servo motor is in transmission connection with the second driving wheel 511 through a belt.

Further, the reversing element 4011 is a spiral bevel gear reversing box, and the first driving shaft 401 and the first ball screw 402 realize synchronous rotation through the spiral bevel gear reversing box; the second driving shaft 411 and the second ball screw 412 rotate synchronously through a spiral bevel gear reversing box. As a preferred embodiment, the spiral bevel gear direction changing box comprises a box body, a first bevel gear and a second bevel gear, wherein the first bevel gear is sleeved on the driving shaft (the first driving shaft 401 or the second driving shaft 411), the second bevel gear is sleeved on the ball screw (the first ball screw 402 or the second ball screw 412), and the first bevel gear is meshed with the second bevel gear.

The utility model discloses a plastic welding machine, including frame 600 and hot plate, drive block, it is required to explain here, hot plate, drive block be the part commonly used among the prior art, prior art can be referred to its concrete structure, plastic welding machine still include:

the driving mechanism of the plastic welding machine is fixedly arranged on the frame 600.

Compared with the prior art, the utility model discloses following beneficial effect has:

the driving mechanism of the plastic welding machine of the utility model enables the first lifting platform and the second lifting platform to be lifted stably in the vertical direction through the arrangement of the first lifting structure and the second lifting structure; through the arrangement of the first driving structure and the second driving structure, the synchronous motion consistency of the two ends of the first lifting platform and the second lifting platform is good, meanwhile, when a weldment with a large machining size is machined, the pressing effect of the lifting platform can be ensured, and the welding quality is high.

The utility model discloses an in an embodiment of the actuating mechanism of plastics welding machine, elevation structure comprises curb plate, slide rail and piston shoes, and it can ensure the stability at the lift platform lift in-process effectively, and lifting resistance is little simultaneously, simple structure.

In another embodiment of the driving mechanism of the plastic welding machine of the present invention, the driving means comprises a power unit and a driving wheel, and is in transmission connection with the driving wheel through the power unit, so that the driving shaft is driven to rotate through the power unit, and the lifting platform is driven to lift; thereby change traditional drive mode into rigid drive mode by flexible drive mode for the elevating platform can shorten the takt time at the welding completion back direction motion immediately, and rigid drive structure can guarantee that upper and lower welding part is highly more even at the pressfitting behind upper and lower mould compound die in addition, and the part is after the compound die under the flexible structure can not appear, some local pressfittings, and some places do not have the situation of pressfitting, thereby improve the final welding quality of product greatly, reduce the welding defective rate.

The utility model discloses a plastic welding machine, through the setting of the actuating mechanism of plastic welding machine for the pressfitting height ratio after last bed die compound die of its upper and lower welding part is more even, and the part is behind the compound die under the flexible construction can not appear, and some local pressfittings, some places do not have the situation of pressfitting, thereby improve the final welding quality of product greatly, reduce the welding defective rate, vibrate for a short time, strike for a short time at the elevating platform lift in-process simultaneously, do not have the noise.

Drawings

FIG. 1 is a schematic structural view of a prior art plastic welder;

fig. 2 is a schematic structural diagram of the plastic welding machine of the present invention.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

Meanwhile, in the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", 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 referred devices or elements must have a specific orientation, be configured and operated in a specific orientation, and thus, are not to be construed as limiting the present application.

In addition, in the present application, "set up", "locate" and "be provided" may be provided as a fixed connection, may also be provided as an integral body, may also be provided as a detachable fixed connection, and those skilled in the art may select a suitable setting mode according to different situations.

The present invention will be further explained with reference to the drawings and the embodiments.

Referring to fig. 2, the present invention provides a driving mechanism of a plastic welding machine, including a first lifting platform 100 and a second lifting platform 200, when in use, a workpiece to be welded is placed between the first lifting platform 100 and the second lifting platform 200, a worker operates a heating plate and a driving block (the heating plate may be a metal heating plate or an infrared radiator, which is not limited herein, the heating plate and the driving block are common in the prior art, and the heating principle of the connection mode refers to the prior art) to heat a welding surface of the workpiece to be welded (the heating may be contact heating or radiation heating), and then the heating plate and the driving block are removed to make the first lifting platform 100 and the second lifting platform 200 move relatively in a vertical direction, so as to weld the workpiece to be welded by pressing. The driving mechanism of the plastic welding machine further comprises:

at least one first ball screw 402, one end of the first ball screw 402 is engaged with the reversing element 4011, so that the first ball screw 402 is driven by the first driving shaft 401 to rotate through the reversing element 4011, the first ball screw 402 can be fixed on the frame 600 through a bearing, and

at least one second ball screw 412, one end of the second ball screw 412 is engaged with the reversing element 4011, so that the second ball screw 412 is driven to rotate by the second driving shaft 411 through the reversing element 4011, the second ball screw 412 can be fixed on the frame 600 through a bearing, and

Example 1

In this embodiment, the first lifting structure includes:

a first lifting unit, the first lifting unit comprising:

a first side plate 3011; and

In this embodiment, one side end of the first lifting platform 100 is fixedly connected to a first sliding shoe, and the first sliding shoe is matched with the first sliding rail 3012; the other side end is fixedly connected with a first vertical type nut seat 403 of the first driving means, and the first vertical type nut seat 403 is matched with the first ball screw 402; thereby ensuring that the first elevating stage 100 is stable during the elevating process.

The second elevation structure comprises:

a second lifting unit, the second lifting unit comprising:

a second side plate 3021; and

one end of the second sliding shoe is fixedly connected with the side end of the second lifting platform 200, and the other end of the second sliding shoe is matched with the second sliding rail 3022, and the second sliding shoe can slide in the second sliding rail 3022 relatively.

In this embodiment, one side end of the second lifting platform 200 is fixedly connected to a second sliding shoe, and the second sliding shoe is engaged with the second sliding rail 3022; the other side end is fixedly connected with a second vertical type nut seat 413 of the second driving means, and the second vertical type nut seat 413 is matched with a second ball screw 412; thereby ensuring that the second elevating stage 200 is stabilized during the elevating process.

Example 2

Referring to fig. 2, in the present embodiment, the first lifting structure includes:

two first lifting units, the first lifting units comprising:

a first side plate 3011; and

In this embodiment, the first lifting units are symmetrically disposed at two side ends of the first lifting platform 100.

Two second lifting units, the second lifting units comprising:

a second side plate 3021; and

In this embodiment, the second lifting units are symmetrically disposed at both side ends of the second lifting platform 200.

It should be noted that a person skilled in the art may set different numbers of lifting structures according to the size of the piece to be welded, and the application is not limited herein.

Example 3

Referring to fig. 2, as a preferred embodiment of

embodiments

1 and 2, in this embodiment, the first driving means includes:

The first power unit 500 is a servo motor, and a belt pulley arranged on a power output shaft of the servo motor is in transmission connection with the first driving wheel 501 through a belt.

The second driving means includes:

a second power unit; and

The second power unit is a servo motor, and a belt pulley arranged on a power output shaft of the servo motor is in transmission connection with the second driving wheel 511 through a belt.

Example 4

As a preferred embodiment of the above embodiments, in this embodiment, the reversing element 4011 is a spiral bevel gear box, and the first driving shaft 401 and the first ball screw 402 are synchronously rotated by the spiral bevel gear box; the second driving shaft 411 and the second ball screw 412 rotate synchronously through a spiral bevel gear reversing box. The spiral bevel gear reversing box comprises a box body, a first bevel gear and a second bevel gear, the first bevel gear is sleeved on a driving shaft (a first driving shaft 401 or a second driving shaft 411), the second bevel gear is sleeved on a ball screw (a first ball screw 402 or a second ball screw 412), and the first bevel gear is meshed with the second bevel gear.

The utility model discloses a plastic welding machine please refer to fig. 2, including frame 600 and hot plate, drive block, it needs to explain here, hot plate, drive block be the part commonly used among the prior art, prior art can be referred to its concrete structure, plastic welding machine still include:

It should be noted that the embodiments of the present invention are written in a progressive manner, and the differences from the previous embodiments are mainly described, and the same parts in the embodiments may refer to the previous embodiments.

The above only is the embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structures or equivalent processes of the present invention are used in the specification and the attached drawings, or directly or indirectly applied to other related technical fields, and the same principle is included in the protection scope of the present invention.

Claims

1. A drive mechanism of a plastic welding machine comprises a first lifting platform (100) and a second lifting platform (200), and is characterized by further comprising:

the first lifting structure is matched with the side end of the first lifting platform (100) so that the first lifting platform (100) can be lifted in the vertical direction relative to the first lifting structure; and

the second lifting structure is matched with the side end of the second lifting platform (200) so that the second lifting platform (200) can be lifted and lowered in the vertical direction relative to the second lifting structure; and

the first driving structure is matched with the side end of the first lifting platform (100) and used for driving the first lifting structure to lift in the vertical direction, and the first driving structure comprises:

at least one first drive shaft (401), the first drive shaft (401) being located above the first lifting structure, reversing elements (4011) being provided at both ends of said first drive shaft (401), and

a first drive means for driving the first drive shaft (401) in rotation, and

at least one first ball screw (402), which first ball screw (402) cooperates with the reversing element (4011) at one end, an

The first ball screw (402) penetrates through the first vertical nut seat (403) and is in threaded fit with the first vertical nut seat (403), and the side end of the first vertical nut seat (403) is fixedly connected with the side end of the first lifting platform (100); and

the second drive structure, this second drive structure and second elevating platform (200) side cooperation for drive second elevating system goes up and down in vertical direction, the second drive structure include:

at least one second driving shaft (411), the second driving shaft (411) is positioned below the second lifting structure, reversing elements (4011) are arranged at two ends of the second driving shaft (411), an

A second driving means for driving the second driving shaft (411) to rotate, an

At least one second ball screw (412), which second ball screw (412) cooperates with the reversing element (4011) at one end, an

And the second ball screw (412) penetrates through the second vertical nut seat (413) and is in threaded fit with the second vertical nut seat (413), and the side end of the second vertical nut seat (413) is fixedly connected with the side end of the second lifting platform (200).

2. The drive mechanism for a plastic welding machine as defined in claim 1, wherein said first lifting structure comprises:

at least one first lifting unit, the first lifting unit comprising:

a first side panel (3011); and

the first sliding rail (3012), the first sliding rail (3012) is set up concavely in the first lateral plate (3011) and close to the first lifting platform (100) one side; and

one end of the first sliding shoe is fixedly connected with the side end of the first lifting platform (100), the other end of the first sliding shoe is matched with the first sliding rail (3012), and the first sliding shoe can slide in the first sliding rail (3012) relatively.

3. The drive mechanism for a plastic welding machine as defined in claim 2, wherein said first lifting structure comprises:

the two first lifting units are symmetrically arranged at two side ends of the first lifting platform (100).

4. The drive mechanism for a plastic welding machine as defined in claim 1, wherein said second lifting structure comprises:

at least one second lifting unit, the second lifting unit comprising:

a second side plate (3021); and

the second sliding rail (3022), the second sliding rail (3022) is concavely arranged on one surface of the second side plate (3021) close to the second lifting platform (200); and

one end of the second sliding shoe is fixedly connected with the side end of the second lifting platform (200), the other end of the second sliding shoe is matched with the second sliding rail (3022), and the second sliding shoe can slide in the second sliding rail (3022) relatively.

5. The drive mechanism for a plastic welding machine as defined in any one of claims 1-4, wherein said first drive means comprises:

a first power unit (500); and

the first driving wheel (501), the first drive shaft (401) runs through the axle center of the first driving wheel (501), and the first driving wheel (501) is in transmission connection with the first power unit (500).

6. The driving mechanism of a plastic welding machine as claimed in claim 5, characterized in that the first power unit (500) is a servo motor, and a belt pulley arranged on a power output shaft of the servo motor is in transmission connection with the first driving wheel (501) through a belt.

7. The drive mechanism for a plastic welding machine as defined in any one of claims 1-4, wherein said second drive means comprises:

a second power unit; and

and the second driving wheel (511), the second driving shaft (411) penetrates through the axle center of the second driving wheel (511), and the second driving wheel (511) is in transmission connection with the second power unit.

8. The driving mechanism of a plastic welding machine as claimed in claim 7, characterized in that the second power unit is a servo motor, and a belt pulley arranged on a power output shaft of the servo motor is in transmission connection with the second driving wheel (511) through a belt.

9. The drive mechanism of a plastic welding machine as claimed in any one of claims 1-4, 6, 8, characterized in that the reversing element (4011) is a spiral bevel gear box, and the first drive shaft (401) and the first ball screw (402) are synchronously rotated through the spiral bevel gear box; the second driving shaft (411) and the second ball screw (412) realize synchronous rotation through a spiral bevel gear reversing box.

10. The utility model provides a plastic welding machine, includes frame (600) and hot plate, drive block, its characterized in that still includes:

the driving mechanism of a plastic welding machine as claimed in any one of claims 1-9, wherein the driving mechanism of the plastic welding machine is fixedly arranged on the machine frame (600).