阅读说明：本技术 一种拖布轮 (Mop wheel ) 是由 陈小龙 于 2019-08-21 设计创作，主要内容包括：本发明提供了一种拖布轮,属于缝纫机拖布轮装置技术领域,包括：机架,其呈固定设置；电机组件,其设置在所述机架上；固定滚轮,其可转动的设置在所述机架上；活动滚轮,其可转动的设置在所述机架上,并且所述活动滚轮与所述固定滚轮抵触连接从而夹紧布料；联动组件,其与所述电机组件以及所述活动滚轮连接,并且所述电机组件通过所述联动组件带动所述活动滚轮抬升,从而使所述活动滚轮与所述固定滚轮分离。本发明的有益效果为：采用电动的方式来带动滚轮抬升,能够省时省力,并且还可以提高工作效率。(The invention provides a cloth dragging wheel, belonging to the technical field of sewing machine cloth dragging wheel devices, comprising: the frame is fixedly arranged; the motor assembly is arranged on the rack; the fixed roller is rotatably arranged on the rack; the movable roller is rotatably arranged on the rack and is connected with the fixed roller in an abutting mode so as to clamp the cloth; and the linkage assembly is connected with the motor assembly and the movable roller, and the motor assembly drives the movable roller to lift through the linkage assembly, so that the movable roller is separated from the fixed roller. The invention has the beneficial effects that: the electric mode is adopted to drive the idler wheels to lift, time and labor can be saved, and the working efficiency can be improved.)

1. A mop wheel, comprising:

The frame is fixedly arranged;

The motor assembly is arranged on the rack;

The fixed roller is rotatably arranged on the rack;

The movable roller is rotatably arranged on the rack and is connected with the fixed roller in an abutting mode so as to clamp the cloth;

And the linkage assembly is connected with the motor assembly and the movable roller, and the motor assembly drives the movable roller to lift through the linkage assembly, so that the movable roller is separated from the fixed roller.

2. a mop wheel as defined in claim 1, further comprising: the mop wheel further comprises a transmission assembly, the transmission assembly is in linkage connection with the fixed roller and the movable roller, and the transmission assembly is used for driving the fixed roller and the movable roller to rotate in opposite directions so as to drag cloth to move.

3. A mop wheel as defined in claim 2, further comprising: the frame includes base, first mount pad, first transmission shaft and second transmission shaft, the vertical setting of first mount pad is in on the base, the bar hole has been seted up on the first mount pad, mobilizable setting of first transmission shaft is in the bar hole, movable roller with first transmission shaft is connected, the second transmission shaft sets up just on the base fixed roller with the second transmission shaft is connected.

4. A mop wheel as defined in claim 3, further comprising: be provided with in the frame and be used for the guide the direction subassembly that the movable roller removed, direction subassembly includes guide rail, guide block and bearing block, the guide rail is vertical to be fixed on the first mount pad, guide block slidable sets up on the guide rail, the bearing block with guide block fixed connection, and first transmission shaft wears to establish on the bearing block.

5. A mop wheel as defined in claim 4, further comprising: the linkage assembly comprises a rotating wheel, an eccentric shaft, a connecting rod, a rocking handle, an installation shaft and a pull rod, the rotating wheel is connected with the motor assembly, the eccentric shaft is arranged on the rotating wheel, the connecting rod is connected with the eccentric shaft, the installation shaft is arranged on the first installation seat, the rocking handle is rotatably arranged on the installation shaft, two ends of the rocking handle are respectively hinged with the connecting rod and the pull rod, the pull rod is in linkage connection with the first transmission shaft, and the first transmission shaft is driven to ascend through the pull rod after the rotating wheel rotates.

6. A mop wheel as defined in claim 5, further comprising: the rocking handle comprises an inclined bar part, a first hinge part and a second hinge part, wherein the first hinge part and the second hinge part are formed by bending two ends of the inclined bar part, the lower end of the inclined bar part is connected with the mounting shaft so that the rocking handle rotates on the mounting shaft, the first hinge part is hinged with the lower end of the connecting rod, and the second hinge part is hinged with the upper end of the pull rod.

7. A mop wheel as defined in claim 5, further comprising: the bearing block is provided with a linkage plate, the linkage plate is connected with the lower end of the pull rod, the pull rod is provided with a pressure spring, the pressure spring is abutted to the linkage plate, downward pressure is applied to the linkage plate, and therefore the movable roller is pressed on the fixed roller through the pressure spring.

8. A mop wheel as defined in claim 3, further comprising: the motor assembly comprises a driving motor, a switch and a pedal, the driving motor is fixed on the first mounting seat and is connected with the rotating wheel, the pedal is connected with the switch in a linkage manner, the switch is electrically connected with the driving motor, the driving motor is started through the switch when the pedal is stepped on, the driving motor drives the movable roller to move upwards, the driving motor is started through the switch when the pedal is loosened, and the driving motor drives the movable roller to move downwards and abut against the fixed roller.

9. A mop wheel as defined in claim 3, further comprising: the base is provided with a second mounting seat, the transmission assembly is arranged on the second mounting seat, the first transmission shaft and the second transmission shaft are arranged on the second mounting seat in a penetrating mode, and the transmission assembly is in linkage connection with the first transmission shaft and the second transmission shaft so as to drive the first transmission shaft and the second transmission shaft to rotate.

10. A mop wheel as defined in claim 9, further comprising: the transmission assembly comprises a transmission motor, a driving gear, a first transmission gear, a second transmission gear and a transmission belt, the first transmission gear is connected with the first transmission shaft, the second transmission gear is connected with the second transmission shaft, the transmission motor is fixed on the second mounting seat and connected with the driving gear, two ends of the transmission belt are sleeved on the driving gear and the second transmission gear, and the first transmission gear is meshed with the outer surface of the transmission belt.

Technical Field

the invention belongs to the technical field of a cloth dragging wheel device of a sewing machine, and relates to a cloth dragging wheel.

Background

The sewing machine is sewing the in-process because the special reason and the sewing machine structure particularity of surface fabric and sewing thread, and the sewing machine is carrying out the planarization of sewing in-process for guaranteeing the sewing material to the cloth, adopts on the market to drag the cloth backward and can drive the back of tow boat upward movement and drag the device and guarantee the planarization of sewing material.

In order to enable cloth to be capable of moving while sewing, a cloth dragging wheel is arranged on a plurality of sewing machines at present, for example, a Chinese patent with application number of 201810726573.0 discloses a cloth dragging wheel device, which comprises a support, a main shaft arranged on the support, a driven wheel connected and arranged at one end of the main shaft, a connecting rod arranged at the other end of the main shaft and fixedly connected with the main shaft at the top end, a connecting sleeve rotatably connected with the bottom end of the connecting rod, a one-way bearing arranged on the connecting sleeve and a roller supported on the one-way bearing, wherein the top end of the connecting rod is eccentrically connected with the main shaft, and the driven wheel is connected with a driving wheel on the sewing machine through a transmission piece.

Although foretell mop wheel can realize driving the cloth and remove, the mop wheel is at the actual work in-process, and the gyro wheel need lift up, just can pack the cloth into under the gyro wheel to drive the cloth and remove, and current mop wheel adopts manual mode to drive the gyro wheel lifting usually, and so not only waste time and energy, still influence machining efficiency easily, so have certain improvement space.

Disclosure of Invention

The invention aims to solve the problems in the prior art and provide a mop wheel.

The purpose of the invention can be realized by the following technical scheme: a mop wheel, comprising:

the frame is fixedly arranged;

The motor assembly is arranged on the rack;

The fixed roller is rotatably arranged on the rack;

the movable roller is rotatably arranged on the rack and is connected with the fixed roller in an abutting mode so as to clamp the cloth;

And the linkage assembly is connected with the motor assembly and the movable roller, and the motor assembly drives the movable roller to lift through the linkage assembly, so that the movable roller is separated from the fixed roller.

Preferably, the mop wheel further comprises a transmission assembly, the transmission assembly is in linkage connection with the fixed roller and the movable roller, and the transmission assembly is used for driving the fixed roller and the movable roller to rotate in opposite directions so as to drag the cloth to move.

Preferably, the frame includes base, first mount pad, first transmission shaft and second transmission shaft, the vertical setting of first mount pad is in on the base, the bar hole has been seted up on the first mount pad, mobilizable setting of first transmission shaft is in the bar hole, movable roller with first transmission shaft is connected, the second transmission shaft sets up on the base just fixed roller with the second transmission shaft is connected.

Preferably, a guide assembly for guiding the movable roller to move is arranged on the frame, the guide assembly comprises a guide rail, a guide block and a bearing block, the guide rail is vertically fixed on the first mounting seat, the guide block is slidably arranged on the guide rail, the bearing block is fixedly connected with the guide block, and the first transmission shaft is arranged on the bearing block in a penetrating manner.

Preferably, the linkage assembly includes a rotating wheel, an eccentric shaft, a connecting rod, a rocking handle, an installation shaft and a pull rod, the rotating wheel is connected with the motor assembly, the eccentric shaft is arranged on the rotating wheel, the connecting rod is connected with the eccentric shaft, the installation shaft is arranged on the first installation base, the rocking handle is rotatably arranged on the installation shaft, two ends of the rocking handle are respectively hinged with the connecting rod and the pull rod, the pull rod is in linkage connection with the first transmission shaft, and the first transmission shaft is driven to ascend through the pull rod after the rotating wheel rotates.

Preferably, the rocking handle includes a slanted portion, and a first hinge portion and a second hinge portion formed by bending two ends of the slanted portion, the lower end of the slanted portion is connected with the mounting shaft so as to enable the rocking handle to rotate on the mounting shaft, the first hinge portion is hinged to the lower end of the connecting rod, and the second hinge portion is hinged to the upper end of the pull rod.

Preferably, a linkage plate is arranged on the bearing block and connected with the lower end of the pull rod, a pressure spring is arranged on the pull rod and abutted against the linkage plate so as to apply downward pressure to the linkage plate, and therefore the movable roller is pressed on the fixed roller through the pressure spring.

Preferably, the motor assembly includes a driving motor, a switch and a pedal, the driving motor is fixed on the first mounting seat and connected with the rotating wheel, the pedal is linked with the switch, the switch is electrically connected with the driving motor, when the pedal is stepped on, the driving motor is started through the switch, and the driving motor drives the movable roller to move upwards, when the pedal is released, the driving motor is started through the switch, and the driving motor drives the movable roller to move downwards and abut against the fixed roller.

Preferably, a second mounting seat is arranged on the base, the transmission assembly is arranged on the second mounting seat, the first transmission shaft and the second transmission shaft are arranged on the second mounting seat in a penetrating mode, and the transmission assembly is in linkage connection with the first transmission shaft and the second transmission shaft so as to drive the first transmission shaft and the second transmission shaft to rotate.

Preferably, the transmission assembly comprises a transmission motor, a driving gear, a first transmission gear, a second transmission gear and a transmission belt, the first transmission gear is connected with the first transmission shaft, the second transmission gear is connected with the second transmission shaft, the transmission motor is fixed on the second mounting seat and connected with the driving gear, two ends of the transmission belt are sleeved on the driving gear and the second transmission gear, and the first transmission gear is meshed with the outer surface of the transmission belt.

compared with the prior art, the invention has the beneficial effects that:

1. The electric mode is adopted to drive the idler wheels to lift, time and labor can be saved, and the working efficiency can be improved.

2. the linkage assembly adopts the lever structure, so that the moment can be amplified, a heavier movable roller is lifted through a low-power motor, and the rocking handle is linked by adopting a lever principle, so that the lifting speed is high, the rocking handle is very sensitive, and the movable roller can be lifted to a higher height through the action of the motor.

3. When the pull rod is not moved, the movable roller can also move upwards for a certain distance, when the movable roller moves upwards, the linkage plate extrudes the pressure spring to compress the pressure spring, and the movable roller can move in a certain range at the moment, so that the buffer effect is achieved, the damage of a linkage assembly is avoided, and the cloth dragging wheel can also have the dual effects of manual lifting and electric lifting.

Drawings

fig. 1 is a schematic structural view of a mop wheel of the present invention.

FIG. 2 is a schematic diagram of the mop wheel of the present invention in a raised position.

Fig. 3 is a schematic view of the state of the movable roller of the mop wheel during pressing.

Fig. 4 is a schematic view of the first transmission shaft and the second transmission shaft of the present invention.

Fig. 5 is a schematic structural diagram of the transmission assembly of the present invention.

FIG. 6 is a schematic structural diagram of the linkage assembly of the present invention.

Fig. 7 is a schematic view of the connection relationship between the driving motor and the rotating wheel according to the present invention.

in the figure, 110, the base; 120. a first mounting seat; 121. a strip-shaped hole; 130. a first drive shaft; 140. a second drive shaft; 150. a second mounting seat; 210. a drive motor; 300. fixing the roller; 400. a movable roller; 510. a rotating wheel; 520. an eccentric shaft; 530. a connecting rod; 540. a rocking handle; 541. a slash section; 542. a first hinge portion; 543. a second hinge portion; 550. installing a shaft; 560. a pull rod; 570. a pressure spring; 610. a drive motor; 620. a driving gear; 630. a first drive gear; 640. a second transmission gear; 650. a transmission belt; 710. a guide rail; 720. a guide block; 721. a linkage plate; 730. and a bearing block.

Detailed Description

The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.

As shown in fig. 1, 2, 3, 4, 5, 6, and 7, a mop wheel includes: a frame, motor element, fixed roller 300, movable roller 400 and linkage subassembly, the mop wheel is one kind and cliies the cloth through movable roller 400 and fixed roller 300, and drive the cloth and remove, thereby realize automatic sewing's sewing machine auxiliary assembly, it installs near sewing machine generally, and current mop wheel, in operation process, need lift up movable roller 400, thereby take out the cloth or pack into new cloth, and movable roller 400 often needs the staff to go to lift up, so not only very troublesome, and the great strength of needs of lifting up movable roller 400, though there are some mechanisms and set up and be convenient for lift up movable roller 400, but actual effect often is not good, no matter what kind of structure, generally all need to come the operation through the staff and just can make movable roller 400 rise.

In the embodiment, the frame is fixedly arranged; specifically, the frame may be clamped to a table of the sewing machine by a clamp, and the cloth may be drawn to move forward or backward according to the installation position of the frame.

The motor assembly is arranged on the frame; preferably, the motor assembly is actually a motor and a mechanism formed by a series of accessories, and mainly provides power for the lifting of the movable roller 400, that is, the motor assembly can drive the movable roller 400 to lift or the movable roller 400 to put down, so that the user does not need to manually operate the mop wheel, and the lifting of the movable roller 400 can be completed directly by controlling the motor assembly.

the fixed roller 300 is rotatably arranged on the frame; preferably, the fixed roller 300 is actually a lower roller which is fixedly disposed to be only rotatable, the cloth is placed on the fixed roller 300, and the movable roller 400 is pressed over the cloth, thereby clamping the cloth.

A movable roller 400 rotatably disposed on the frame, wherein the movable roller 400 is in contact connection with the fixed roller 300 to clamp the cloth; preferably, the movable roller 400 and the fixed roller 300 are vertically disposed, so that when the movable roller 400 is lifted, the cloth can be drawn out or put in, when the movable roller 400 is lowered, the movable roller 400 can be engaged with the fixed roller 300 and clamp the cloth, and when the movable roller 400 and the fixed roller 300 rotate, the cloth can be driven to move.

A linkage assembly connected to the motor assembly and the movable roller 400, and the motor assembly drives the movable roller 400 to be lifted through the linkage assembly, so that the movable roller 400 is separated from the fixed roller 300.

Preferably, the linkage subassembly is in fact the part that connects motor element and movable gyro wheel 400, because motor element's output is the output shaft structure, so must turn into the moment of torsion of motor element through the linkage subassembly and drive movable gyro wheel 400 the effort of the vertical direction that goes up and down, so just can realize the purpose that motor drive movable gyro wheel 400 goes up and down through the linkage subassembly to labour saving and time saving when the operation improves work efficiency simultaneously.

As shown in fig. 1, 4 and 5, on the basis of the above embodiment, the mop wheel further includes a transmission assembly, the transmission assembly is in linkage connection with the fixed roller 300 and the movable roller 400, and the transmission assembly is used for driving the fixed roller 300 and the movable roller 400 to rotate in opposite directions so as to drag the cloth to move.

Preferably, in the working process of the mop wheel, after the movable roller 400 and the fixed roller 300 clamp the cloth, the movable roller 400 and the fixed roller 300 need to rotate in opposite directions to drive the cloth to move, and a component for driving the movable roller 400 and the fixed roller 300 to rotate is a transmission component, the transmission component is in linkage connection with the fixed roller 300 and the movable roller 400, and can enable the movable roller 300 and the fixed roller 400 to rotate in different directions, for example, the movable roller 400 rotates clockwise, and the fixed roller 300 needs to rotate counterclockwise, so that the cloth is transferred.

As shown in fig. 1, fig. 2, fig. 3, fig. 4, and fig. 5, based on the above embodiment, the rack includes a base 110, a first mounting seat 120, a first transmission shaft 130, and a second transmission shaft 140, the first mounting seat 120 is vertically disposed on the base 110, a strip-shaped hole 121 is disposed on the first mounting seat 120, the first transmission shaft 130 is movably disposed in the strip-shaped hole 121, the movable roller 400 is connected to the first transmission shaft 130, the second transmission shaft 140 is disposed on the base 110, and the fixed roller 300 is connected to the second transmission shaft 140.

preferably, the base 110 has a horizontal plate structure, the first mounting seat 120 has a vertical plate structure, the first transmission shaft 130 has a multi-section shaft structure due to the connection with the movable roller 400, each section of shaft is connected by a universal joint, and the second transmission shaft 140 has a common shaft structure.

Preferably, have bar hole 121 on the first mount pad 120, because first transmission shaft 130 need reciprocate, so need set up bar hole 121 and be convenient for it wear to establish and reciprocate in bar hole 121, and second transmission shaft 140 sets up on base 110, and its fixed setting is and can rotate to drive fixed idler wheel 300 and rotate, and movable idler wheel 400 realizes the pivoted through first transmission shaft 130 simultaneously, can also realize the oscilaltion through first transmission shaft 130.

As shown in fig. 1, 2, and 3, on the basis of the above embodiment, a guide assembly for guiding the movable roller 400 to move is disposed on the frame, the guide assembly includes a guide rail 710, a guide block 720, and a bearing block 730, the guide rail 710 is vertically fixed on the first mounting seat 120, the guide block 720 is slidably disposed on the guide rail 710, the bearing block 730 is fixedly connected to the guide block 720, and the first transmission shaft 130 is inserted through the bearing block 730.

Preferably, the movable roller 400 is lifted by a motor, so that the moving direction thereof needs to be guided, and specifically, a guide assembly is provided to guide the moving track of the first transmission shaft 130, wherein the first transmission shaft 130 passes through the strip-shaped hole 121, then passes through the bearing block 730, and then the end of the first transmission shaft is connected to the movable roller 400, and the bearing block 730 is fixed to the guide block 720, so that the bearing block 730 and the first transmission shaft 130 can only move along the direction of the guide rail 710, and the final effect is to ensure that the movable roller 400 is lifted along the direction of the guide rail 710.

As shown in fig. 1, 2, 3, 4, 6, and 7, based on the above embodiment, the linkage assembly includes a rotating wheel 510, an eccentric shaft 520, a connecting rod 530, a rocking handle 540, a mounting shaft 550, and a pull rod 560, the rotating wheel 510 is connected to the motor assembly, the eccentric shaft 520 is disposed on the rotating wheel 510, the connecting rod 530 is connected to the eccentric shaft 520, the mounting shaft 550 is disposed on the first mounting base 120, the rocking handle 540 is rotatably disposed on the mounting shaft 550, two ends of the rocking handle 540 are respectively hinged to the connecting rod 530 and the pull rod 560, the pull rod 560 is linked to the first transmission shaft 130, and the first transmission shaft 130 is driven to ascend by the pull rod 560 after the rotating wheel 510 rotates.

In the existing mop wheel, although a linkage part or a driving part is also arranged to drive the roller to lift, the roller is often driven to lift by adopting a simple cam structure, the linkage part is not suitable for the motor-driven mop wheel, because the lifting force generated by the linkage part of the cam structure is insufficient, the movable roller 400 with large self-weight cannot be lifted by the motor, the lifting speed is low, the structure is not compact enough, and the linkage part also has no self-locking effect, after the motor drives the cam to lift the roller, the roller is actually in a state of stopping rotation, the cam structure easily enables the roller to automatically fall down, so that a linkage assembly which can provide enough lifting force is needed, and the movable roller 400 is not easy to automatically fall down.

Preferably, the linkage assembly includes a rotating wheel 510, an eccentric shaft 520, a connecting rod 530, a crank 540, a mounting shaft 550, and a pull rod 560, and the mounting shaft 550 is located substantially at the right side of the rotating wheel 510, and the crank 540 is substantially similar to a lever structure in terms of technical principle, and the movable roller 400 is mainly lifted by the pull rod 560, and the pull rod 560 is hinged to the crank 540, and when the crank 540 is rocked, the end hinged to the pull rod 560 is tilted, thereby pulling up the pull rod 560, or when the end of the crank 540 hinged to the pull rod 560 is sunk, the pull rod 560 can push the movable roller 400 to move downward.

From the analysis of force, the complicated lever linkage mechanism formed by the connecting rod 530 and the rocking handle 540 is mainly linked by the rocking handle 540 functioning as a lever, when the eccentric shaft 520 rotates, the connecting rod 530 is actually driven to lift or press down the left end of the rocking handle 540, when the left end of the rocking handle 540 is lifted, the right end of the rocking handle 540 descends, so that the movable roller 400 is pressed by the pull rod 560 and sufficient pressing force is provided, and when the left end of the rocking handle 540 descends, the right end of the rocking handle 540 is lifted, and at this time, the pull rod 560 pulls up the movable roller 400.

Due to the adoption of the lever structure, the moment can be amplified, so that the heavier movable roller 400 is lifted by the low-power motor, and the rocking handle 540 is linked by adopting the lever principle, so that the lifting speed is high, the rocking handle is very sensitive, and the movable roller 400 can be lifted to a higher height by the action of the motor.

Preferably, the linkage assembly further has a certain self-locking effect, since the handle 540 drives the pull rod 560 by the principle of leverage, when the right end of the handle 540 is lifted, the left end of the handle 540 is sunk, and even if the motor stops rotating, if the right end of the handle 540 is lowered, the left end of the handle 540 is tilted, and if the left end of the handle 540 is tilted, the connecting rod 530 is forced to push the rotating wheel 510 in the opposite direction, and in the structure of the linkage assembly, the connecting rod 530 cannot push the rotating wheel 510 at a certain angle, so that a certain self-locking effect can be achieved.

The reason why the connecting rod 530 cannot push the rotating wheel 510 to rotate back to the original position is that the connecting rod 530 cannot apply a horizontal acting force to the eccentric shaft 520, specifically, the connecting rod 530 is hinged to the eccentric shaft 520, and the eccentric shaft 520 is disposed on the rotating wheel 510, when the connecting rod 530 pushes the rotating wheel 510, the rotating wheel 510 can rotate by a certain angle, and finally the eccentric shaft 520 is located above the rotating wheel, and at this time, the eccentric shaft 520 can rotate only by applying a horizontal acting force to the eccentric shaft 520, and the connecting rod 530 only has an upward acting force and cannot generate a horizontal acting force, that is, when the movable roller 400 pulls the pull rod 560 downward, the connecting rod 530 pushes the eccentric shaft 520 upward, and at this time, since the rotating wheel 510 cannot rotate, a self-locking effect is achieved, and the reliability of the operation of the linkage assembly is ensured.

As shown in fig. 1, 2, 3, 4, 6, and 7, in the above embodiment, the rocking handle 540 includes a ramp portion 541 and a first hinge portion 542 and a second hinge portion 543 bent at both ends of the ramp portion 541, a lower end of the ramp portion 541 is connected to the mounting shaft 550 to rotate the rocking handle 540 on the mounting shaft 550, the first hinge portion 542 is hinged to a lower end of the link 530, and the second hinge portion 543 is hinged to an upper end of the pull rod 560.

Preferably, the rocking handle 540 is substantially shaped like a root, which can effectively amplify the moment, specifically, a certain included angle is formed between the inclined bar portion 541 and the first hinge portion 542 and the second hinge portion 543, wherein the distance between the first hinge portion 542 and the mounting shaft 550 is short, and the distance between the second hinge portion 543 and the mounting shaft 550 is long, so that the lever effect can be more obvious, that is, the first hinge portion 542 is short, and it can transmit the small amplitude swing to the pull rod 560 after being amplified by the second hinge portion 543, so that the second hinge portion 543 can swing greatly.

Preferably, during the operation, the upper end position of the connecting rod 530 is actually changed by a certain amount after being driven by the eccentric shaft 520, so that the height position of the lower end of the connecting rod 530 is changed to a small extent, the first hinge portion 542 is driven to move up and down by the change of the height position of the lower end of the connecting rod 530, and the lever structure can amplify the small extent of the movement by the second hinge portion 543, and then the pull rod is moved up and down to a large extent.

Specifically, when the movable roller 400 needs to be lifted, the rotating wheel 510 rotates to a position where the eccentric shaft 520 is located at the right side, the connecting rod 530 drives the first hinge portion 542 to descend, and when the first hinge portion 542 descends, the second hinge portion 543 can ascend, so as to pull the pull rod 560, at this time, the second hinge portion 543 receives a downward force, and the first hinge portion 542 receives an upward force, so that the connecting rod 530 is pushed upward, and since the connecting rod 530 is hinged to the eccentric shaft 520, the rotating wheel 510 may rotate to a small extent, and finally, when the eccentric shaft 520 is located at the top end of the rotating wheel 510, the connecting rod 530 can only rotate by a horizontal force, and only an upward force can be applied by the connecting rod 530, so the rotating wheel 510 cannot rotate, and the second hinge portion 543 cannot ascend.

When the movable roller 400 is pressed against the fixed roller 300, the linkage assembly can also fix the roller so that it cannot move upward, thereby ensuring the pressing force between the movable roller 400 and the cloth, specifically, the second hinge portion 543 presses the pull rod 560 downward, so that the pull rod 560 transmits the pressure to the movable roller 400, at this time, the eccentric shaft 520 is located at the left side of the rotating wheel 510, and the height of the lower end of the connecting rod 530 is actually slightly increased compared with the eccentric shaft 520 located at the right side of the rotating wheel 510, so that the first hinge portion 542 can be pulled to move upward, thereby ensuring the reliable contact between the movable roller 400 and the fixed roller 300.

As shown in fig. 1, 2, 3, and 4, on the basis of the above embodiments, an interlocking plate 721 is disposed on the bearing block, the interlocking plate 721 is connected to the lower end of the pull rod 560, a pressure spring 570 is disposed on the pull rod 560, and the pressure spring 570 abuts against the interlocking plate 721 to apply a downward pressure to the interlocking plate 721, so that the movable roller 400 is pressed on the fixed roller 300 by the pressure spring 570.

Preferably, the bearing block is mainly connected with the pull rod 560 through the linkage plate 721, and in an actual structure, the linkage plate can be fixedly connected with the bearing block and the guide block at the same time, the lower end of the pull rod 560 passes through the linkage plate 721 and is locked through a nut, the linkage plate 721 can move on the pull rod 560, when the pull rod 560 is pulled up, the guide block 720 can be driven to move upwards through the nut, the pull rod 560 is provided with a pressure spring 570, the linkage plate 721 is connected with the pressure spring 570 in an abutting manner, and the pressure spring 570 presses the linkage plate 721 on the nut at the bottom end of the pull rod 560 through elasticity, so that the linkage plate 721 is pressed downwards by the pull rod 560, and the movable roller 400 abuts on the fixed roller 300.

Preferably, when the pull rod 560 is not moved, the movable roller 400 can also move upward for a certain distance, and when the movable roller 400 moves upward, the linkage plate 721 presses the pressure spring 570 to compress the pressure spring 570, so that the movable roller 400 can move within a certain range, thereby achieving a buffering effect, avoiding damage to the linkage assembly, and also having dual effects of manual lifting and electric lifting in the mop wheel.

As shown in fig. 1, 2, 3, 6, and 7, based on the above embodiment, the motor assembly includes a driving motor 210, a switch (not shown) and a pedal (not shown), the driving motor 210 is fixed on the first mounting seat 120, the driving motor 210 is connected to the rotating wheel 510, the pedal is linked to the switch, the switch is electrically connected to the driving motor 210, the driving motor 210 is started by the switch when the pedal is pressed, the driving motor 210 drives the movable roller 400 to move upward, the driving motor 210 is started by the switch when the pedal is released, and the driving motor 210 drives the movable roller 400 to move downward and abut against the fixed roller 300.

Preferably, the motor assembly includes a driving motor 210, a switch, and a pedal, and may further include a speed reducer, and the driving motor 210 may be fixed to the first mounting base 120, may be directly connected to the rotating wheel 510, and may also be connected to the rotating wheel 510 through the speed reducer, and when the driving motor 210 operates, it rotates a certain number of turns and then stops, so that the eccentric shaft 520 of the rotating wheel 510 is located above or below, thereby adjusting the movable roller 400.

Preferably, driving motor 210 is mainly connected with the pedal through the switch, the pedal is arranged on the table body of the sewing machine, when the pedal is stepped on, the switch can be triggered, switch control driving motor 210 rotates, stop until eccentric shaft 520 is located below rotating wheel 510, manual control is not needed at this moment, movable roller 400 can be lifted to a set position only by stepping on the pedal, and after the pedal is loosened, the switch is triggered, thereby the control motor rotates, eccentric shaft 520 is located above rotating wheel 510, and at this moment, movable roller 400 is placed down, the whole process is very simple and labor-saving, the working efficiency can be greatly improved, and the operation is completely controlled without hands.

As shown in fig. 1, 4 and 5, on the basis of the above embodiment, a second mounting seat 150 is disposed on the base 110, the transmission assembly is disposed on the second mounting seat 150, the first transmission shaft 130 and the second transmission shaft 140 are both disposed on the second mounting seat 150 in a penetrating manner, and the transmission assembly is linked with the first transmission shaft 130 and the second transmission shaft 140, so as to drive the first transmission shaft 130 and the second transmission shaft 140 to rotate.

Preferably, the base 110 is further provided with a vertical second mounting seat 150, the second mounting seat 150 and the first mounting seat 120 are arranged side by side, a certain distance exists between the second mounting seat 150 and the first mounting seat 120, two ends of the first transmission shaft 130 and the second transmission shaft 140 are respectively arranged on the first mounting seat 120 and the second mounting seat 150, and the transmission assembly is arranged on the second mounting seat 150 and used for driving the first transmission shaft 130 and the second transmission shaft 140 to rotate towards opposite directions, so that the cloth can be reliably driven to move.

As shown in fig. 4 and 5, on the basis of the above embodiment, the transmission assembly includes a transmission motor 610, a driving gear 620, a first transmission gear 630, a second transmission gear 640, and a transmission belt 650, the first transmission gear 630 is connected to the first transmission shaft 130, the second transmission gear 640 is connected to the second transmission shaft 140, the transmission motor 610 is fixed on the second mounting seat 150 and is connected to the driving gear 620, two ends of the transmission belt 650 are sleeved on the driving gear 620 and the second transmission gear 640, and the first transmission gear 630 is engaged with an outer surface of the transmission belt 650.

Preferably, the transmission motor 610 needs to drive the first transmission shaft 130 and the second transmission shaft 140 to rotate in opposite directions, so the driving gear 620 is connected to the transmission motor 610, and the transmission belt 650 has a rack, the second transmission gear 640 is connected to the driving gear 620 through the transmission belt 650, such that the second transmission shaft 140 rotates, and the rack on the outer surface of the transmission belt 650 drives the first transmission gear 630 to rotate, such that the rotation direction of the first transmission gear 630 is opposite to the rotation direction of the second transmission gear 640, such that the transmission efficiency can be improved, and the torque of the first transmission shaft 130 and the second transmission shaft 140 is larger.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.