WO2011140861A1 - Energy-saving type small concave-wheel plastic circular machine - Google Patents

Abstract

An energy-saving type small concave-wheel plastic circular machine comprises a machine frame (1), a motor (2), a drive-sway device and a shuttle device. The shuttle device comprises a shuttle body (22), a shuttle driving mechanism (21) and a shuttle positioning mechanism (13). The shuttle positioning mechanism comprises an upper reed ring (16) and a lower reed ring (17). Main guide rails (14) are provided on the inner sides of the upper reed ring and the lower reed ring, and assistant guide rails (15) are provided on the outsides of the upper reed ring and the lower reed ring. The main guide rails and the assistant guide rails cooperate respectively with the main rollers (18) and assistant rollers (19) of the shuttle body in a roll-contact manner. One end of the drive-sway device is connected firmly with the main shaft (4) of the motor via a small concave-wheel (5), and the other end is hinged to the band means (10) via a sway bar (7). The plastic circular machine can solve efficiently the problem that a single-guide-rail reed ring thereof may cause the shuttle to run off the rail because the shuttle wheels are worn or loosen, which results in easily the problem of safety accident. The plastic circular machine can also solve the problem that the rollers and cam thereof are easily worn and can not be replaced conveniently, and bearings of the rollers are easily damaged due to pollution because the rollers are exposed to powder for a long time.

Description

 Description

Energy-saving small concave wheel plastic circular loom

 The invention relates to the technical field of circular loom, and more particularly to an energy-saving small concave plastic circular weave.

 At present, most of the plastic circular looms adopt a large cam type single track door ring structure, such as the public day.

On October 24, 2007, the brown-rod oil-free plastic circular loom disclosed in the Chinese patent document CN200963866 includes a pulley, a spindle, a bottom basin, a cam, a shuttle, an upper door ring, a shuttle, a weft yarn package, The warp, the lower door ring, the outer brown rod, the inner brown rod, the middle ring, the upper slider, the slider roller, the lower slider, the slider guide column and the frame are characterized in that the outer circumference of the cam has a top and bottom curve convex The upper and lower planes of the upper and lower curved bosses each have a slider roller and a rolling roller. The slider rollers are respectively mounted on the roller shafts of the upper slider and the lower slider, and the main feature is that the large cam is changed by sliding friction during operation. For rolling friction, the entire mechanism is not lubricated with lubricating oil, reducing power loss, reducing wear and tear and solving oil problems. However, the structure is a single-track door ring structure, and the shuttle guide wheel on the front shuttle arm is tightly mounted on the size ring. Once the shuttle wheel is worn or loose, there is a danger that the shuttle will be off track and cause a safety accident. The publication date is July 22, 2009, and the Chinese patent document with the publication number CN201276632 discloses a swing arm type oil-free small cam circular loom. On the basis of the original circular loom structure, a small cam is fixed on the main shaft. The outer circumference of the small cam is provided with a single curved boss which periodically rises and falls. The upper and lower planes of the boss are in rolling contact with the roller, and the roller and the swing arm The head is connected in motion, the middle of the swing arm is movably connected with the swing arm seat, the tail of the swing arm is fixedly connected with the heald strap, and the swing arm seat is fixed on the chassis; the roller, the upper roller, the heald strap, the swing arm, the swing arm seat and the lower roller The number is 32 or more. The circular loom improves the cam to a small diameter cam; the hyperbolic groove on the cam is improved to a single curved boss, and the sliding friction transmission of the cam and the slider is improved to a rolling friction transmission, which reduces wear to a certain extent. However, the difference in the linear speed of the tread caused by the rectangular contact between the boss and the roller makes the roller and the cam easy to wear and the energy consumption is improved. The long-time operation causes the roller to wear and the opening and contraction is reduced, and the normal operation cannot be performed. In addition, the roller is exposed to the outside of the cam boss, and the bearing is damaged due to contact with the plastic powder for a long time. When the roller and the pendulum bearing are replaced, the bearing is fastened on the pendulum. To replace the bearing, the bearing must be firstly disassembled. The seat can be replaced, so the plastic circular loom has the defects of high energy consumption, fragile parts and inconvenient maintenance.

Summary of the invention

 The object of the present invention is to solve the problem that the single track door ring of the prior art circular gantry is easy to cause the shuttle to get out of the track and cause a safety accident due to wear or looseness of the shuttle wheel, and provides a safe and reliable energy saving of the shuttle without leaving the track. Small concave wheel plastic circular loom.

 Another object of the present invention is to solve the problem that the roller and cam of the prior art circular looms are easy to wear and inconvenient to replace, and the rollers are exposed to dust for a long time, and the bearings are easily damaged by pollution, thereby providing a cam that is not easy to wear and the rollers are not. An energy-saving small concave plastic circular loom that is bare and easy to replace.

The specific technical solution adopted by the present invention for achieving the above technical purpose is: an energy-saving small concave plastic circular loom comprising a frame, a motor, a swinging device and a shuttle device, wherein the motor is arranged on a motor seat at a lower part of the frame, The shuttle device and the swinging device are respectively disposed at an upper portion and a middle portion of the frame, and the shuttle device includes a shuttle body, a shuttle driving mechanism and a shuttle positioning mechanism, and the shuttle positioning mechanism includes an upper door ring and a lower door ring, and is inside the upper door ring and the lower door ring Set the main track, set outside the upper and lower door rings The sub-track is disposed, and the main rail and the sub-track are respectively in rolling contact with the main shuttle wheel and the auxiliary shuttle wheel of the shuttle body, and one end of the driving device is fastened to the main shaft of the motor through the small concave wheel, and the other end is passed through the swing rod The brown belt is hinged. The prior art single track door ring is changed into a double track door ring, the main track is arranged inside the door ring, the auxiliary track is arranged outside the door ring, and the main track and the auxiliary track are respectively in rolling contact with the main shuttle wheel and the auxiliary shuttle wheel of the shuttle body. And set the movable shed on the auxiliary track to facilitate the loading and unloading of the shuttle. The shuttle adopts double-track positioning. When the shuttle moves, the main shuttle wheel moves along the main track of the door ring. When the machine stops or fails, the auxiliary shuttle wheel keeps the shuttle correctly on the door ring track through the door ring auxiliary track, and the shuttle will not leave the track, avoiding The safety accident of the shuttle loom has improved the safety performance of the circular loom. When loading and unloading the shuttle, it is convenient to open the side track side of the door ring.

Preferably, the small concave wheel is disposed in a middle portion of the frame, and the outer surface of the small concave wheel is circumferentially provided with a trapezoidal groove or a rectangular groove which is arranged in a lifting curve in the axial direction of the small concave wheel, and the end of one end of the pendulum rod Two swing rod rollers are arranged side by side in the axial direction. One end of the swing rod is disposed in the trapezoidal groove or the rectangular groove through the swing rod roller, and the width of the upper groove side of the trapezoidal groove or the rectangular groove is wider than the width of the lower groove side. A step is arranged on the inner side of the upper groove side, and the swing rod roller near the end of the swing rod is in rolling contact with the inner side of the lower groove side, and the other swing rod roller is in rolling contact with the inner side of the upper groove side. The prior art cam is changed into a concave wheel, that is, the ribs arranged circumferentially of the wheel are changed into grooves, so that the roller at the end of the pendulum can be placed in the groove, since the groove structure covers the roller, avoiding The prior art roller has been damaged due to long-term exposure to dust in the dust, which prolongs the service life. The two swing rod rollers respectively fit the upper and lower groove sides of the groove, which can improve the transmission precision; the step structure disposed on the inner side of the upper groove can prevent the swing rod roller near the end of the swing rod from contacting the upper groove edge of the groove, the trapezoidal groove or The width of the upper groove edge of the rectangular groove is larger than the width of the edge of the lower groove, so that the other pendulum roller can avoid the lower groove edge of the groove, and the two swing bar rollers are respectively fitted to the upper and lower groove sides of the groove. With side width Compared with the equal groove, since the upper and lower sides of the groove only need to be processed by half, the amount of finishing of the groove is reduced, and the roller at the end of the pendulum can be coaxially arranged without setting an eccentric shaft, which simplifies the pendulum The end structure reduces costs.

 Preferably, the lifting curve is a sinusoidal lifting curve, and the sinusoidal lifting curve comprises three complete sinusoidal periods, and the trapezoidal groove or the rectangular groove provided on the small concave wheel has three high points and three low points. The first and last smooth connection of the sinusoidal lifting curve; the pendulum roller is a conical wheel, and the tapered surface of the pendulum roller near the end of the pendulum is matched with the lower groove edge of the trapezoidal groove or the rectangular groove, and the other The tapered surface of the pendulum roller is adapted to the trapped groove or the upper grooved edge of the rectangular groove. The sinusoidal lifting curve can make the sliding between the swinging rod and the small concave wheel smooth and smooth, which can reduce the wear of the roller and the small concave wheel, reduce the noise and energy consumption, and prolong the service life of the equipment. At the same time, due to the shape of the two rollers and the small concave wheel The groove adopts a tapered matching contact, so that the roller is not affected by the difference of the linear speed, and no axial friction is generated, which further improves the service life of the roller and the small concave wheel and reduces the noise, and also greatly reduces the energy of the device. Compared with the prior art, it can save more than 35% of electric energy. The tapered double roller solves the loss caused by the need to stop the replacement of the roller of the existing circular loom, which improves the production efficiency and greatly reduces the production cost.

Preferably, the brown belt is disposed on the pair of guide wheels on the frame, and the other end of the swing rod is hinged with the brown belt connecting plate disposed on the brown belt, and is disposed on the swing rod body adjacent to the swing rod roller. The hinge mechanism includes a pair of symmetrically arranged angular contact ball bearings, and the swing link is hinged to the bracket of the frame by a hinge mechanism. The main shaft drives the small concave wheel to rotate, and the groove of the small concave wheel drives the end of the swing rod to move up and down by the roller. Since the swing rod body near the swing rod roller is provided with a hinge mechanism with the frame, the entire swing rod is similar. The movement of the seesaw, the hinged end of the pendulum and the brown belt moves up and down with a certain multiple of the sinusoidal fluctuation of the small concave wheel, thereby driving the brown belt up and down Move, complete the weaving process of the plastic circular loom, a pair of symmetrically arranged angular contact ball bearings can not only withstand the radial force, but also can withstand the axial force, which can meet the requirements of the swing rod.

 Preferably, the shuttle body comprises a shuttle wheel mounting plate having an arc-shaped sliding plate shape, wherein the main shuttle wheel is four, and four corner portions disposed at two ends of the concave surface of the shuttle wheel mounting plate are located on the shuttle body. The main shuttle wheel on the side is in rolling contact with the main rail on the upper door ring, and the main shuttle wheel on the lower side of the shuttle body is in rolling contact with the main rail on the lower door ring; the four auxiliary shuttle wheels are arranged in the shuttle The four corners at the two ends of the outer surface of the wheel mounting plate, the auxiliary shuttle wheel on the upper side of the shuttle body and the secondary track on the upper door ring are in rolling contact, and the secondary track on the lower side of the shuttle body and the secondary track on the lower door ring are rolled. Contact fit. The shuttle of the present invention adopts eight shuttle wheel double-track positioning, and four main shuttle wheels disposed at four corners of the concave surface of the shuttle wheel mounting plate are closely attached to the main track inside the door ring, and the shuttle is operated due to the inertia centrifugal force of the shuttle body. The shuttle wheel moves along the main track of the door ring, and the four auxiliary shuttle wheels on the outside of the door ring are separated from the sub-track by a certain degree without rotation during the operation of the shuttle. When the machine stops or fails, the shuttle stops rotating, the shuttle body The inertial centrifugal force disappears. At this time, the four auxiliary shuttle wheels are in contact with the door ring sub-track, so that the shuttle can correctly maintain the door ring track, and the shuttle will not leave the track. When loading and unloading the shuttle, just open the movable device set on the side of the door ring. The shed can be very convenient.

 Preferably, the track surface of the main track is a tapered surface, the central axis of the main shuttle wheel is parallel to the track surface of the main track in contact with the main shuttle wheel, and the central shuttle of the main shuttle wheel contacting the upper door ring contacts the lower door of the shuttle body. The central axis of the main shuttle of the ring is a structure that is at an angle to each other. The tapered track surface can provide radial and axial support for the shuttle. The central axis of the main shuttle wheel is parallel to the track surface of the main track that the main shuttle wheel is in contact with, that is, the main shuttle wheel is perpendicular to the track surface to force the main shuttle wheel. Uniform, reduce wheel wear and extend service life.

Preferably, the track surface of the secondary track is a tapered surface, the auxiliary shuttle wheel is a conical wheel, and the cone of the conical wheel The shape structure is adapted to the track surface of the sub-track, and the center axis of the upper side shuttle wheel at the same end of the shuttle wheel mounting plate is parallel to the central axis of the lower side shuttle wheel. The tapered wheel surface of the auxiliary shuttle wheel is adapted to the track surface of the secondary track, and the shuttle can be effectively fixed when the shuttle is not moved, so that the shuttle can correctly maintain the door ring track, and the shuttle does not leave the track.

 Preferably, a rectangular hook structure is protruded from the lower end of the ribbon connecting plate, and a hook groove having a circular cross section is disposed in the middle of the hook structure. The brown belt connecting plate is a pull-up hook structure, and the hook groove adopts a circular hook groove. The brown belt fixing pin can be conveniently fixed in the circular groove. In the state of tightening the brown belt, it is not easy to escape, and the replacement of the brown belt only needs to loosen the brown. With the upper and lower adjustment screws, the brown belt can be removed, which brings great convenience to maintenance.

 The utility model has the beneficial effects that: the utility model effectively solves the problem that the single track door ring of the prior art circular loom has a safety accident caused by the wear or looseness of the shuttle wheel, which is easy to cause the shuttle to get out of the track, and also solves the circular knitting of the prior art. The roller and cam of the machine are easy to wear and inconvenient to replace, and the roller is exposed to dust for a long time, and the bearing is easily contaminated and damaged. Compared with the prior art, the structure of the invention has low noise, long service life, energy saving and high production efficiency, and has high economic benefits.

DRAWINGS

 Figure 1 is a schematic structural view of the present invention;

 2 is a schematic structural view of a shuttle positioning mechanism of the present invention;

 3 is a schematic structural view of a brown tape connecting plate of the present invention;

 4 is a schematic structural view of a small concave wheel of the present invention;

 Fig. 5 is a schematic view showing another structure of the small concave wheel of the present invention.

In the figure: 1-frame, 2-motor, 3-motor base, 4-spindle, 5-small concave wheel, 6-swing rod roller, 7-swing rod, 8-seat, 9-brown strap, 10 - Brown belt, 11-wheel guide, 12-trapezoidal groove, 13- Shuttle positioning mechanism, 14-main track, 15-pair track, 16-door door ring, 17-lower door ring, 18-main shuttle wheel, 19-side shuttle wheel, 20-hook structure, 21-buckle drive mechanism, 22- Shuttle body, 23-upper groove side, 24-lower groove side, 25-rectangular groove.

Specific real

 The specific embodiments of the technical solutions of the present invention will be further described below by way of embodiments and with reference to the accompanying drawings.

Example 1

In the embodiment 1 shown in FIG. 1, an energy-saving small concave plastic circular loom includes a frame 1, a motor 2, a swinging device and a shuttle device, and the motor is arranged on the motor base 3 at the lower part of the frame. The shuttle device and the swinging device are respectively disposed at an upper portion and a middle portion of the frame, and the shuttle device includes a shuttle body 22 (see FIG. 2), a shuttle driving mechanism 21 and a shuttle positioning mechanism 13, and the shuttle body 22 includes an arc-shaped sliding plate shape. The shuttle wheel mounting plate and the four main shuttle wheels 18 and the four auxiliary shuttle wheels 19 disposed on the shuttle wheel mounting plate, the main shuttle wheel is disposed at four corners of the concave ends of the shuttle wheel mounting plate, and the auxiliary shuttle wheel Four corners are provided at the two ends of the convex surface of the shuttle wheel mounting plate. The shuttle positioning mechanism 13 includes an upper door ring 16 and a lower door ring 17, and a main rail 14 having a tapered surface on the inner side of the upper door ring and the lower door ring is provided, and a track surface is tapered on the outer side of the upper door ring and the lower door ring. The sub-track 15 of the surface, the main rail and the sub-track are respectively in rolling contact with the main shuttle 18 and the auxiliary shuttle 19 on the shuttle body 22, and the main shuttle 14 on the upper side of the shuttle body and the main rail 14 on the upper door ring 16 are rolled. The main shuttle wheel on the lower side of the shuttle body is in rolling contact with the main rail on the lower door ring 17; the central axis of the main shuttle wheel 18 is parallel to the track surface of the main track in contact with the main shuttle wheel, and contacts the upper door ring 16 The center axis of the main shuttle wheel and the central axis of the main shuttle wheel of the shuttle body 22 contacting the lower door ring 17 are mutually angled. The auxiliary shuttle wheel 19 is a conical wheel, and the conical structure of the conical wheel is matched with the track surface of the sub-track, and the auxiliary shuttle wheel on the upper side of the shuttle body and the pair on the upper door ring The track 15 is in rolling contact engagement, and the auxiliary shuttle wheel located on the lower side of the shuttle body is in rolling contact with the secondary track on the lower door ring, and the center axis of the upper side shuttle wheel at the same end of the shuttle wheel mounting plate and the center of the lower side shuttle wheel The axes are parallel to each other.

 One end of the oscillating device is fastened to the main shaft 4 of the motor 2 via a small concave wheel 5 disposed in the middle of the frame 1, and the other end is hinged to the brown belt 10 via the swing link 7. The brown belt 10 is disposed up and down on a pair of guide wheels 11 on the frame 1. The other end of the swing rod is hinged with a brown belt connecting plate 9 (see FIG. 3) disposed on the brown belt, and the brown belt is connected to the upper and lower sides. A rectangular hook structure 20 is protruded from both ends, and a hook groove having a circular cross section is disposed in the middle of the hook structure, and both ends of the brown belt are fixed in the circular groove by fixing pins. The outer surface of the small concave wheel 5 is circumferentially provided with a trapezoidal groove 12 (see FIG. 4) which is arranged in an upward and downward direction in the axial direction, and the end of the swinging rod 7 is axially arranged with two swing rod rollers. 6. One end of the swing rod is disposed in the trapezoidal groove through the swing rod roller. The width of the upper groove side 23 of the trapezoidal groove is wider than the width of the lower groove side 24, and the inner side of the upper groove side is provided with a step, and the swing rod near the end of the swing rod The roller is in rolling contact with the inner side of the lower groove, and the other pendulum roller is in rolling contact with the inner side of the upper groove. A hinge mechanism is disposed on the swing lever body adjacent to the swing rod roller. The hinge mechanism includes a pair of symmetrically disposed angular contact ball bearings, and the swing link is hinged to the bracket 8 of the frame by a hinge mechanism.

Example 2

The groove on the small concave wheel 5 of Embodiment 2 is a rectangular groove 25 (see FIG. 5), and one end of the swing rod 7 is disposed in the rectangular groove by the swing rod roller 6, and the upper groove side width of the rectangular groove is larger than The side of the lower groove is wide, and the inner side of the upper groove is provided with a step. The swing rod roller near the end of the swing rod is in rolling contact with the inner side of the lower groove side, and the other swing rod roller is in rolling contact with the inner side of the upper groove side, and the rectangular groove is lifted and lowered. The curve is a sinusoidal lifting curve. The sinusoidal lifting curve contains three complete sinusoidal periods. The small concave groove has three high points and three low points. The first and last sinusoidal lifting curves are smoothly connected. The swing rod roller is a conical wheel, and the tapered surface of the swing rod roller near the end of the swing rod is matched with the lower groove edge of the rectangular groove, and the tapered surface of the other swing rod roller and the rectangular groove are arranged. The groove edges are fitted, and the rest are the same as in the first embodiment.

 When the energy-saving small concave plastic circular loom is working, the motor drives the small concave wheel to rotate, and the groove with the lifting curve on the small concave wheel rotates accordingly, the groove moves the swing rod up and down by the roller, and the other end of the swing rod passes the brown belt The connecting plate drives the brown belt to move up and down. The brown belt drives the two rows of spaced warp yarns to move up and down. At the same time, the shuttle moves along the door ring track under the action of the shuttle driving mechanism. The weft yarn moves horizontally with the shuttle body, and the circular loom is normal. Operation. The shuttle of the invention adopts double-track positioning, and the main shuttle wheel moves along the main track of the door ring when the shuttle moves. When the machine stops or fails, the auxiliary shuttle wheel keeps the shuttle correctly on the door ring track through the door ring auxiliary track, and the shuttle does not detach. The track avoids the safety accident of the shuttle leaving the track and improves the safety performance of the circular loom. In addition, the present invention changes the cam of the prior art into a concave wheel, that is, the ribs disposed circumferentially of the wheel are changed into grooves, so that the roller at the end of the pendulum can be placed in the groove, and the groove structure is covered. The roller avoids the problem that the prior art roller is damaged due to contamination of the bearing in the dust for a long time, and is prolonged.

Claims

Rights request 1. An energy-saving small concave plastic circular loom comprising a frame, a motor, a swinging device and a shuttle device, wherein the motor is arranged on a motor base at a lower part of the frame, and the shuttle device and the swinging device are respectively arranged at the upper part of the frame and In the middle, the shuttle device comprises a shuttle body, a shuttle drive mechanism and a shuttle positioning mechanism, characterized in that the shuttle positioning mechanism (13) comprises an upper door ring (16) and a lower door ring (17), which are arranged inside the upper door ring and the lower door ring The main track (14) is provided with a sub-track (15) outside the upper door ring and the lower door ring, and the main track and the sub-track are respectively in rolling contact with the main shuttle wheel (18) and the auxiliary shuttle wheel (19) of the shuttle body (22). The driving device is fastened to the main shaft (4) of the motor (2) through a small concave wheel (5), and the other end is hinged to the brown belt (10) through the swing rod (7).  The energy-saving small concave plastic circular loom according to claim 1, characterized in that the small concave wheel (5) is disposed in the middle of the frame (1), and the outer surface of the small concave wheel is circumferentially provided with a small circle. a trapezoidal groove (12) or a rectangular groove (25) arranged in a lifting curve in the axial direction of the concave wheel, and the end of one end of the swinging rod (7) is axially arranged with two pendulum rollers (6), the swinging rod One end is disposed in the trapezoidal groove or the rectangular groove through the swing rod roller, and the upper groove side (23) of the trapezoidal groove or the rectangular groove is wider than the side of the lower groove side (24), and the inner side of the upper groove side is provided with a step. The swing rod roller near the end of the swing rod is in rolling contact with the inner side of the lower groove side, and the other swing rod roller is in rolling contact with the inner side of the upper groove side. 3. The energy-saving small concave plastic circular loom according to claim 2, wherein said lifting curve is a sinusoidal lifting curve, and the sinusoidal lifting curve comprises three complete sinusoidal periods, on the small concave wheel (5) The trapezoidal groove (12) or the rectangular groove (25) has three high points and three low points, and the sinusoidal lifting curve is smoothly connected at the beginning and the end; the pendulum roller (6) is tapered. The tapered surface of the pendulum roller near the end of the pendulum (7) is adapted to the trapezoidal groove (12) or the lower groove edge (24) of the rectangular groove (25), and the taper of the other pendulum roller The face is adapted to the trapped groove or the upper groove edge (23) of the rectangular groove.  The energy-saving small concave plastic circular loom according to claim 2, characterized in that the brown belt (10) is arranged up and down on a pair of guide wheels (11) on the frame (1), the pendulum The other end of the rod is hinged with the brown belt connecting plate (9) disposed on the brown belt, and the swing rod body adjacent to the swing rod roller is provided with a hinge mechanism, and the hinge mechanism comprises a pair of symmetrically arranged angular contact ball bearings, The rod is hinged to the bracket (8) of the frame by a hinge mechanism.  The energy-saving small concave plastic circular loom according to claim 1, wherein the shuttle body (22) comprises a shuttle wheel mounting plate having an arc-shaped skateboard shape, and the main shuttle wheel (18) ) 4, set at the four corners on both ends of the concave surface of the shuttle wheel mounting plate. The main shuttle wheel on the upper side of the shuttle body is in rolling contact with the main rail (14) on the upper door ring (16), located under the shuttle body. The main shuttle wheel on the side is in rolling contact with the main rail on the lower door ring (17); the four auxiliary shuttle wheels (19) are four, which are disposed at four corners on both ends of the convex surface of the shuttle wheel mounting plate, and are located in the shuttle The auxiliary shuttle wheel on the upper side of the body is in rolling contact with the auxiliary rail (15) on the upper door ring, and the auxiliary shuttle wheel on the lower side of the shuttle body is in rolling contact with the secondary track on the lower door ring.  6. The energy-saving small concave plastic circular loom according to claim 1 or 2 or 3 or 4 or 5, characterized in that the track surface of the main rail (14) is a tapered surface, the center of the main shuttle wheel (18) The axis is parallel to the track surface of the main track in contact with the main shuttle wheel, and the central axis of the main shuttle that contacts the upper door ring (16) and the central axis of the main shuttle that contacts the lower door ring (17) on the shuttle body (22) is The structure of each other is an angle. 7. The energy-saving small concave plastic circular loom according to claim 1 or 2 or 3 or 4 or 5, The utility model is characterized in that the track surface of the auxiliary track (15) is a tapered surface, and the auxiliary shuttle wheel (19) is a conical wheel. The tapered structure of the conical wheel is matched with the track surface of the sub-track, and is located at the same end of the shuttle wheel mounting plate. The central axis of the upper side shuttle wheel is parallel to the central axis of the lower side shuttle wheel.  The energy-saving small concave plastic circular loom according to claim 1, characterized in that the brown belt connecting plate (9) has a rectangular hook structure (20) protruding from the upper and lower ends, and the hook structure is provided with a horizontal cross. A hook groove with a circular cross section.