CN205011958U - Scraper of non -woven fabrics equipment constructs - Google Patents

Abstract

The utility model relates to a scraping mechanism of non-woven fabric equipment, comprising: a frame body, a driving mechanism and a toggle mechanism installed on the frame body, the driving mechanism and the toggle mechanism are connected through a fork rod, and the driving mechanism drives a screw Rod action, the screw rod is covered with a helical sleeve, and the helical sleeve is provided with a scraper, the driving mechanism can drive the drive gear to rotate forward and reverse; , the two shift fork rods are respectively located outside the two ends of the drive gear; one end of the drive shaft is provided with a screw rod, and the screw sleeve connected to the soft rope is threaded on the screw rod; the swing rod is connected to the shift rod through the first rotating shaft, and the swing rod passes through the second rotating shaft Connect the pulley rod, the first soft rope and the second soft rope are connected to the swing rod from both sides of the swing rod between the first rotating shaft and the second rotating shaft respectively, the first soft rope is connected to the swing rod nearby, and the second soft rope passes through the pulley rod At least one of the pulley guides connects the swing rod from the other side.

Description

A scraping mechanism for non-woven equipment

technical field

The utility model relates to a scraping mechanism for uniform paving, in particular to a scraping mechanism for non-woven fabric equipment.

Background technique

In modern industrial production, in many occasions, it is necessary to evenly spread the paved powder (such as sand, etc.). Ping, the currently generally used scheme is: the frequency converter controls the forward and reverse movement of the motor, and the motor drives the screw scraper mechanism to reciprocate to realize scraping and paving; the stroke end of the scraper generally uses a photoelectric or electromagnetic proximity switch to transmit signals to the frequency converter. The device completes forward and reverse. Due to the limitation of the production environment, dust will be generated during the scraping process. If the proximity switch has no special protection device, it will be easily polluted by dust for a long time, making the signal invalid and causing the inverter to overload and stop.

Contents of the invention

The utility model overcomes the deficiencies of the prior art and provides a circular scraping mechanism with the assistance of a spring swing rod and the restraint of a soft rope.

In order to achieve the above purpose, the technical solution adopted by the utility model is: a scraping mechanism of non-woven fabric equipment, including: a frame body, a driving mechanism and a toggle mechanism installed on the frame body, and a driving mechanism and a toggle mechanism The driving mechanism is driven by the power device through the connection of the fork rod, and the driving mechanism drives the screw rod to move. It is characterized in that the screw rod is covered with a spiral sleeve, and the spiral sleeve is provided with a scraper.

- the drive mechanism can drive the drive gear to rotate forward and reverse;

- the toggling mechanism includes a sliding lever, on which two fork levers are arranged, and the two fork levers are respectively located outside the two ends of the driving gear;

One end of the drive shaft is provided with a screw rod, and the threaded sleeve connected to the soft rope is sleeved on the screw rod; the swing rod is connected to the driving rod through the first rotating shaft, and the swing rod is connected to the pulley rod through the second rotating shaft, and one end of the first spring is fixed Connected to the swing link between the first rotating shaft and the second rotating shaft, the other end of the first spring is fixedly connected to the fixed block, and the first soft rope and the second soft rope swing from the first rotating shaft and the second rotating shaft respectively. The direction on both sides of the rod is connected to the swing rod, the first soft rope is directly connected to the swing rod from the nearest side, and the second soft rope is guided by at least one pulley on the pulley rod to connect to the swing rod from the other side.

In a preferred embodiment of the present invention,

- when the driving gear meshes with the first gear, the swing bar is biased towards the first gear, and the first spring is located on one side of the swing bar's offset direction;

- When the driving gear meshes with the second gear, the swing bar is biased toward the second gear, and the first spring is located at one side of the swing bar's biasing direction.

In a preferred embodiment of the present invention, the screw sleeve is close to the side of the second gear, the screw sleeve is connected to a bent rod, and the free end of the bent rod is connected to the soft rope.

In a preferred embodiment of the present invention,

- when the driving gear meshes with the first gear, the screw drives the screw sleeve away from the driving gear, and the first flexible rope is in a taut state prior to the second flexible rope;

- When the driving gear meshes with the second gear, the screw drives the screw sleeve close to the driving gear, and the second flexible rope is in a tensioned state prior to the first flexible rope.

In a preferred embodiment of the utility model, a supporting plate is provided under the screw rod, and both ends of the supporting plate are sleeved on the corresponding two ends of the screw rod through a rotating shaft.

In a preferred embodiment of the present invention, the two ends of the driving rod are respectively slidably socketed on the corresponding sleeves.

In a preferred embodiment of the utility model, a stopper is provided on both sides of the free end of the swing rod.

In a preferred embodiment of the present invention, the driving gear sliding key is arranged on the driving shaft, and the moving distance of the driving gear on the sliding key of the driving shaft is the distance between the first gear and the second gear axial distance.

In a preferred embodiment of the present invention, the driving mechanism includes a first gear and a second gear that can respectively mesh with the driving gear, the driving gear is slidably arranged on the driving shaft, the first gear and the second gear The two gears rotate in opposite directions; the first gear is coaxially connected with a transmission gear, and the transmission gear meshes with the second gear.

In a preferred embodiment of the present invention, the distance between the two shift fork rods is greater than the axial length of the driving gear.

In a preferred embodiment of the present invention, the first spring is in a stretched state.

In a preferred embodiment of the present invention, the first gear and the transmission gear are arranged coaxially on the first transmission shaft, the second gear is arranged on the second transmission shaft, and the first transmission shaft and The second transmission shaft is arranged in parallel, and the second gear meshes with the transmission gear.

In a preferred embodiment of the present invention, the power device is a motor, and one end of the screw rod is coaxially provided with a screw rod shaft.

In a preferred embodiment of the present invention, the first transmission shaft is connected to the motor by a belt, and the drive shaft is connected to the screw shaft by a belt.

The utility model solves the defects in the background technology, and the utility model has the following beneficial effects:

Through the action of the toggle mechanism, the position of the driving gear can be changed between the first gear and the second gear, which plays the role of changing the meshing object of the driving gear. At the same time, because the first gear and the second gear rotate in opposite directions, it is guaranteed After the drive gear changes the meshing object, the drive shaft changes the direction of rotation.

The rotation direction of the drive shaft and the toggle direction of the toggle mechanism just form a linkage structure. When the drive gear meshes with the first gear, the toggle mechanism is driven by the drive shaft so that the toggle mechanism has a tendency to turn the drive gear to the second gear. And power, and finally the driving gear is separated from the first gear, and driven by the elastic potential energy of the first spring on the swing bar to mesh with the second gear; otherwise, when the driving gear meshes with the second gear, the toggle mechanism will make the driving gear move in the opposite direction .

On the one hand, the structure of the feather key can ensure that there is a clamp limit along the circumference of the drive shaft between the drive gear and the drive shaft, so that the drive gear will not move relative to the drive shaft along the circumference; on the other hand, the drive gear can move along the drive shaft. The axial sliding ensures that the drive gear moves between the first gear and the second gear.

The two shift fork rods are respectively located on both sides of the drive gear, and the drive gear can move axially along the drive shaft under the drive of the shift rod.

The set block can limit the movement posture of the lever, and the stopper can limit the swing lever driven by the first spring within a certain swing range, and then the movement range of the lever is also limited to ensure that the lever will not deviate excessively from left to right , it is only necessary to ensure the meshing distance of the drive gear between the first gear and the second gear.

When the driving gear meshes with the first gear, the pendulum shifts toward the side of the first gear. At this time, the first spring tightens the pendulum, and the screw sleeve is driven away from the first gear by the screw rod. Then the first soft rope is first tightened. And then pull the swing bar to rotate towards the second gear side, when the swing bar crosses the vertical state, the driving gear is disengaged from the first gear, and now the pulling force of the first spring will pull the swing bar towards the second gear side, And swing the pendulum towards the direction of the second gear, and finally press the drive gear to mesh with the second gear.

During the left and right movement of the shift lever, the two shift levers continuously push the drive gear to move left and right along the drive shaft to change the meshing objects.

The mutual cooperation between the first rotating shaft and the second rotating shaft makes the swing bar rotate with the second rotating shaft as the center of a circle, drives the driving lever to move left and right, and then drives the shift fork lever to move left and right following the driving rod.

Two pulleys are arranged on the left and right sides of the second rotating shaft. After the second soft rope bypasses the two pulleys, the changed direction of the second soft rope pulls the pendulum bar, ensuring that the two soft ropes can pull the pendulum from different directions. pole.

During the left and right movement of the bending rod, the first soft rope and the second soft rope can achieve an asynchronous preferential tensioning state, so that the pendulum can only be tightened by one soft rope at the same time.

The setting of the stopper ensures that the lower end of the swing rod will not deviate beyond the range, that is, the swing rod will not make the moving range of the shift rod too large.

The screw drives the structure of the screw sleeve, and then the screw sleeve provides the power source for the toggle mechanism. Since the rotation direction of the screw is related to the meshing object of the drive gear, the movement direction of the screw sleeve is related to the rotation direction of the drive shaft, and the rotation direction of the drive shaft The direction of rotation is controlled by the toggling mechanism; thus, the above-mentioned process forms a cyclic motion process of mutual influence, and the toggling mechanism and the driving mechanism continuously affect the continuous cyclic control.

When the driving gear meshes with the first gear, the reel close to the second gear will tighten its corresponding soft rope. When the soft rope is stretched to a certain degree, the soft rope will pull the pendulum. The fork lever on the rod moves, and the fork lever pushes the drive gear to the direction of the second gear, and finally makes the drive gear mesh with the second gear, so that the drive shaft reverses; otherwise, the drive gear is pushed to the direction of the first gear and engage.

The distance between the two shift fork rods is greater than the axial length of the drive gear, which can provide inertial buffering for the reverse movement of the drive gear.

The distance between the two shift fork rods is greater than the axial length of the drive gear, and the length longer than the drive gear is the margin of the distance between the two shift fork rods relative to the length of the drive gear. Due to the existence of the above margin, the swing rod is in the vertical position In the normal state, the two shift fork levers will not be blocked by the drive gear, and the swing lever only needs to rely on inertia when it crosses its vertical state.

The transmission gear is coaxial with the first gear, and the second gear meshes with the transmission gear to realize the reverse rotation of the first gear and the second gear.

Through the transmission function of the driving mechanism, the purpose of transmitting the power of the motor to the screw rod is realized; at the same time, through the function of the toggle mechanism, the meshing object of the driving gear can be changed, thereby realizing the forward and reverse rotation of the screw rod.

Through the forward and reverse rotation of the screw rod, the screw sleeve realizes the reciprocating movement of the scraper along the axis of the screw rod, so that the scraper can spread (the powder spread on the supporting plate) on the carrier (such as braided Cloth), and along with the carrier along the direction perpendicular to the screw rod, slowly pass the powder above the pallet and evenly scrape it off.

The rotating shaft of the supporting plate is set on the screw rod. Due to gravity, the supporting plate can always be located under the screw rod, so that the supporting plate can assist the scraper to spread the powder.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

Fig. 1 is a three-dimensional structure diagram one of a preferred embodiment of the present utility model;

Fig. 2 is the three-dimensional structure diagram two of the preferred embodiment of the present utility model;

Fig. 3 is a three-dimensional structure diagram 1 of a toggle mechanism and a drive mechanism of a preferred embodiment of the present utility model;

Fig. 4 is the three-dimensional structure diagram 2 of the toggle mechanism and the drive mechanism of the preferred embodiment of the present invention;

In the figure: 1, the first gear, 2, the second gear, 3, the driving gear, 4, the driving shaft, 5, the feather key, 6, the transmission gear, 7, the driving lever, 8, the fork lever, 9, the cover block , 10, screw rod, 11, screw sleeve, 12, bent rod, 13, swing rod, 15, first rotating shaft, 16, second rotating shaft, 17, fixed block, 18, pulley rod, 19, pulley, 20, first Spring, 21, block, 22, first soft rope, 23, second soft rope, 33, bolt locking device, 34, frame body, 35, first transmission shaft, 36, second transmission shaft, 37, motor, 38, screw rod, 39, belt, 42, spiral sleeve, 43, scraper, 44, supporting plate.

detailed description

The utility model is described in further detail now in conjunction with accompanying drawing and embodiment, and these accompanying drawings all are simplified schematic diagrams, only illustrate the basic structure of the utility model in schematic mode, so it only shows the formation relevant to the utility model.

As shown in Figures 1-4, a scraping mechanism for non-woven fabric equipment includes: a frame body 34, and a drive mechanism and a toggle mechanism installed on the frame body 34. The drive mechanism and the toggle mechanism pass through the fork lever 8, the drive mechanism is driven by the power unit, and the drive mechanism drives the screw rod 38 to move. The screw rod 38 is provided with a helical sleeve 42, and the helical sleeve 42 is provided with a scraper 43.

The drive mechanism includes a drive gear 3 that can mesh with the first gear 1 and the second gear 2 respectively, the drive gear 3 is slidably arranged on the drive shaft 4, and the rotation direction of the first gear 1 and the second gear 2 is opposite; The action can change the position of the driving gear 3 between the first gear 1 and the second gear 2, which plays the role of changing the meshing object of the driving gear 3. At the same time, because the first gear 1 and the second gear 2 rotate in opposite directions, it is guaranteed that each After the secondary driving gear 3 changes the meshing object, the driving shaft 4 all changes the direction of rotation.

The first gear 1 and the transmission gear 3 are coaxially arranged on the first transmission shaft 35, the second gear 2 is arranged on the second transmission shaft 36, the first transmission shaft 35 is arranged in parallel with the second transmission shaft 36, and the second gear 2 Mesh together with transmission gear 3, power unit is motor 37, and one end of screw rod 38 is coaxially provided with screw rod shaft. Through the transmission effect of the driving mechanism, the power of the motor 37 is delivered to the screw rod 38; at the same time, through the action of the toggle mechanism, the meshing object of the driving gear 3 can be changed, and then the forward and reverse rotation of the screw rod 38 can be realized.

The first drive shaft 35 is connected to the motor 37 by a belt 39, and the drive shaft 4 belt 39 is connected to the screw shaft. The belt pulley on the motor 37, the belt pulley on the first transmission shaft 35, the belt pulley on the drive shaft 4 and the belt pulley on the screw rod shaft have played the effect that the motor 37 rotating speeds are decelerated by the transmission of two belts 39, and the rotation speed of the drill bit shaft The speed is reduced. The motor 37 that the utility model adopts is also a low-speed motor.

A supporting plate 44 is arranged under the screw rod 38 , and the two ends of the supporting plate 44 are sleeved on the corresponding two ends of the screw rod 38 through the rotating shaft. The spiral sleeve 42 realizes the reciprocating circular movement of the scraper 43 along the axial direction of the screw rod 38 through the forward and reverse rotation of the screw rod 38, so that the scraper 43 can flatten the powder (spread on the top of the pallet 44) Spread on the carrier (such as woven cloth), and along with the carrier along the direction perpendicular to the screw rod 38, slowly pass the powder above the supporting plate 44 and evenly scrape it off. The rotating shaft of the supporting plate 44 is arranged on the screw rod 38. Due to gravity, the supporting plate 44 can always be positioned under the screw rod 38, so that the supporting plate 44 can assist the scraper 43 to spread the powder.

The toggling mechanism includes a sliding lever 7, on which two fork levers 8 are arranged. Axis 4 moves axially.

One end of the drive shaft 4 is provided with a screw rod 10, and the threaded sleeve 11 connected to the soft rope 14 is threaded on the screw rod 10; The direction of rotation is related to the meshing object of the drive gear 3, so the direction of motion of the screw sleeve 11 is related to the direction of rotation of the drive shaft 4, and the direction of rotation of the drive shaft 4 is controlled by the toggle mechanism; During the cycle movement process, the toggle mechanism and the drive mechanism continuously affect the continuous cycle control.

The fork 13 is connected to the shift lever 7 through the first rotating shaft 15, the fork 13 is connected to the pulley lever 18 through the second rotating shaft 16, and one end of the first spring 20 is fixedly connected to the fork 13 between the first rotating shaft 15 and the second rotating shaft 16. The other end of the first spring 20 is fixedly connected to the fixed block 17 . The mutual cooperation of the first rotating shaft 15 and the second rotating shaft 16 enables the swing lever 13 to rotate with the second rotating shaft 16 as the center of a circle, driving the driving rod 7 to move left and right, and then driving the shift fork rod 8 to follow the driving rod 7 to move left and right.

The first flexible rope 22 and the second flexible rope 23 are respectively connected to the swing lever 13 from the direction on both sides of the swing lever 13 between the first rotating shaft 15 and the second rotating shaft 16, and the first flexible rope 22 is directly connected from the nearest side. Fork 13, the second soft rope 23 is guided by at least one pulley 19 on the pulley bar 18 and connected with fork 13 from the other side. Two pulleys 19 are arranged on the left and right sides of the second rotating shaft 16. After the second soft rope 23 bypasses the two pulleys 19, the transformed second soft rope 23 pulls the direction of the pendulum 13 to ensure that the two soft ropes 14 can be moved separately. Pull the swing lever 13 from different directions. During the left and right movement of the curved rod 12, the first flexible rope 22 and the second flexible rope 23 can achieve an asynchronous priority tension state, so that the swing rod 13 can only be tightened by one flexible rope 14 at the same time. .

The rotation direction of the drive shaft 4 and the toggle direction of the toggle mechanism just form a linkage structure. When the drive gear 3 meshes with the first gear 1, the toggle mechanism is driven by the drive shaft 4 so that the toggle mechanism has the ability to turn the drive gear 3 to The inclination and power of the second gear 2, and finally the driving gear 3 breaks away from the first gear 1, and is driven by the elastic potential energy of the first spring 20 on the fork 13 to mesh with the second gear 2; otherwise, the driving gear 3 and the second gear 2 When engaged, the toggle mechanism will cause the drive gear 3 to move in reverse.

During the left and right movement of the shift lever 7, the shift fork lever 8 continuously pushes the drive gear 3 to move left and right along the drive shaft 4 through the two shift fork levers 8 to change the meshing object.

When the driving gear 3 meshes with the first gear 1, the swing lever 13 is biased towards the direction of the first gear 1, and the first spring 20 is located on one side of the offset direction of the swing lever 13; when the driving gear 3 is meshed with the second gear 2, the swing lever 13 is biased toward In the direction of the second gear 2 , the first spring 20 is located on one side of the shifting direction of the swing rod 13 . When the driving gear 3 is meshed with the first gear 1, the swing rod 13 is shifted toward the first gear 1 side, at this moment, the first spring 20 tightens the swing rod 13, and the screw sleeve 11 is driven away from the first gear 1 by the screw rod 10, and then The first soft rope 22 is first tightened, and then the swing lever 13 is pulled to rotate towards the second gear 2. When the swing lever 13 crosses the vertical state, the drive gear 3 is disengaged from the first gear 1. At this time, the first spring 20 The pulling force will pull the swing bar 13 towards the second gear 2, swing the swing bar 13 towards the second gear 2, and finally press the driving gear 3 to mesh with the second gear 2.

The first spring 20 is in tension.

The screw sleeve 11 is close to the side of the second gear 2 , the screw sleeve 11 is connected to the bent rod 12 , and the free end of the bent rod 12 is connected to the soft rope 14 .

When the driving gear 3 meshes with the first gear 1, the screw 10 drives the screw sleeve 11 away from the driving gear 3, and the first soft rope 22 is in a tight state before the second soft rope 23; when the driving gear 3 meshes with the second gear 2, The screw rod 10 drives the screw sleeve 11 to approach the driving gear 3 , and the second flexible rope 23 is in a taut state prior to the first flexible rope 22 . When the drive gear 3 meshes with the first gear 1, the reel close to the second gear 2 will tighten its corresponding soft rope 14, and when the soft rope 14 is stretched to a certain degree, the soft rope 14 will swing When the lever 13 is pulled, the fork lever 8 on the shift lever 7 also moves, and the fork lever 8 pushes the driving gear 3 to the direction of the second gear 2, and finally makes the driving gear 3 mesh with the second gear 2, so that the driving Shaft 4 reverses; conversely, drive gear 3 is pushed to the direction of first gear 1 and engages.

The distance between the two shift fork rods 8 is greater than the axial length of the drive gear 3 , which can provide inertial buffering for the reverse movement of the drive gear 3 . The distance between the two shift fork rods 8 is greater than the axial length of the drive gear 3, and the length longer than the drive gear 3 is the margin of the distance between the two shift fork rods 8 relative to the length of the drive gear 3. Due to the existence of the above margin, the pendulum When the bar 13 is in the vertical state, the two fork rods 8 will not be blocked by the drive gear 3, and the fork 13 only needs to rely on inertia when it crosses its vertical state.

Fork 13 free ends both sides are respectively provided with a stopper 21, and the setting of stopper 21 guarantees that the lower end of fork 13 can not deviate beyond the range, that is fork 13 can not make driving lever 7 move too much.

The two ends of the driving rod 7 are respectively slidably socketed on the respective corresponding sets of blocks 9, the sets of blocks 9 can limit the movement posture of the driving rod 7, and at the same time, the stopper 21 can limit the swing rod 13 driven by the first spring 20 to a certain swing. Within the range, and then the range of movement of the driving rod 7 is also limited, so as to ensure that the driving rod 7 will not deviate excessively left and right, and only ensure that the driving gear 3 changes the meshing distance between the first gear 1 and the second gear 2.

The drive gear 3 feather key 5 is arranged on the drive shaft 4, and the moving distance of the drive gear 3 on the feather key 5 of the drive shaft 4 is the axial distance between the first gear 1 and the second gear 2. The structure of the feather key 5 on the one hand It can ensure that there is a clamp limit along the circumference of the drive shaft 4 between the drive gear 3 and the drive shaft 4, and ensure that the drive gear 3 will not move relative to the drive shaft 4 along the circumference. On the other hand, the drive gear 3 can move along the drive shaft 4. 4 to ensure that the drive gear 3 moves between the first gear 1 and the second gear 2.

The first gear 1 is coaxially connected to the transmission gear 6, the transmission gear 6 meshes with the second gear 2, the transmission gear 6 is coaxial with the first gear 1, and the second gear 2 meshes with the transmission gear 6, realizing the first gear 1 and the second gear The reverse rotation of the second gear 2.

The curved rod 12 is provided with a bolt locking device 33 at its corner, and the part of the curved rod 12 parallel to the drive shaft 4 can be inserted into the inner hole of the bolt locking device 33 and slide in the inner hole. The bolt locking device 33 The bolts on the top are screwed in and screwed out to control the tightness; by adjusting the relative position of the bent rod 12 and the bolt locking device 33, the position adjustment of the bent rod 12 to the shift fork rod 8 can be realized, so as to adjust the shifting of the shift fork rod 8 to the driving gear. timing.

The driving rod 7 can only move along the axial direction of the driving rod 7 itself under the restriction of the cover block 9, but the driving rod 7 cannot rotate along the axial direction of the driving rod itself in the cover block 9, so that the movement on the driving rod 7 is ensured. The shift fork lever 8 can not turn to, and it has also ensured that the shift fork lever 8 can be moved to the drive gear 3 on its motion track.

The above is inspired by the ideal embodiment of the utility model, and through the above description, relevant personnel can make various changes and modifications within the scope of not deviating from the technical idea of the utility model. The technical scope of this utility model is not limited to the content in the description, but must be determined according to the scope of the claims.

Claims (10)

1. the scraping mechanism of a non-woven fabrics apparatus, comprise: support body, and the driving mechanism be arranged on support body and toggle mechanism, driving mechanism and toggle mechanism are connected by shifting fork bar, and described driving mechanism is driven by power set, and described driving mechanism drives screw rod action, it is characterized in that, described screw rod is arranged with screw casing, and described screw casing is provided with scraper plate

-described driving mechanism can drive driven wheel to rotate and reverse;

-described toggle mechanism comprises the driving lever sliding and arrange, and described driving lever is arranged two shifting fork bars, two shifting fork bars lay respectively at outside the two ends of driven wheel;

Described driving shaft one end is provided with screw rod, and the swivel nut thread bush connecting tightrope is connected on described screw rod; Fork connects driving lever by the first rotating shaft, fork connects roller arm by the second rotating shaft, one end of first spring is fixedly connected on the fork between the first rotating shaft and the second rotating shaft, the first spring other end is fixedly connected on fixed block, first tightrope and the second tightrope connect fork from the direction of the fork both sides between the first rotating shaft and the second rotating shaft respectively, first tightrope directly connects fork from side nearby, and the second tightrope is guided by least one pulley on roller arm and connects fork from opposite side.

2. the scraping mechanism of a kind of non-woven fabrics apparatus according to claim 1, it is characterized in that: described driving mechanism comprises first gear and the second gear that can engage with driven wheel respectively, described driven wheel is slidably arranged on driving shaft, and described first gear is contrary with described second gear direction of rotation;

Described first gear coaxial connection for transmission gear, described travelling gear and described second gears meshing.

3. the scraping mechanism of a kind of non-woven fabrics apparatus according to claim 2, is characterized in that:

Be provided with supporting plate below described screw rod, described two ends of bearing plate is set in the corresponding two ends of screw rod by rotating shaft.

4. the scraping mechanism of a kind of non-woven fabrics apparatus according to claim 3, is characterized in that: described swivel nut is near described second gear side, and described swivel nut connects knee, and described knee free end connects described tightrope.

5. the scraping mechanism of a kind of non-woven fabrics apparatus according to claim 3 or 4, is characterized in that:

When-described driven wheel and described first gears meshing, described in described screw drive, swivel nut is away from described driven wheel, and described first tightrope is in tensioned state prior to described second tightrope;

When-described driven wheel and described second gears meshing, described in described screw drive, swivel nut is near described driven wheel, and described second tightrope is in tensioned state prior to described first tightrope.

6. the scraping mechanism of a kind of non-woven fabrics apparatus according to claim 1, is characterized in that: described driving lever two ends are slidably socketed respectively on each self-corresponding cover block.

7. the scraping mechanism of a kind of non-woven fabrics apparatus according to claim 2, is characterized in that:

When-described driven wheel and described first gears meshing, the described first gear direction of described fork deflection, described first spring is positioned at side, described fork offset direction;

When-described driven wheel and described second gears meshing, the described second gear direction of described fork deflection, described first spring is positioned at side, described fork offset direction.

8. the scraping mechanism of a kind of non-woven fabrics apparatus according to claim 1, is characterized in that: the spacing described in two between shifting fork bar is greater than the axial length of described driven wheel.

9. the scraping mechanism of a kind of non-woven fabrics apparatus according to claim 1, is characterized in that: described fork free end both sides are respectively provided with a block.

10. the scraping mechanism of a kind of non-woven fabrics apparatus according to claim 2, it is characterized in that: described driven wheel feather key is arranged on described driving shaft, described driven wheel displacement on the feather key of driving shaft be namely described first gear and described second gear shaft to distance.