Rotary rear beam and weaving machine

Abstract

The invention discloses a rotary rear beam and a loom, and relates to the technical field of textile equipment, the rotary rear beam comprises a driving gear, the driving gear drives a first driven gear and a second driven gear through a transmission gear, the first driven gear is sleeved in a fixed beam port, and the second driven gear is fixedly connected with one end of a swing beam; the swing beam is rotatably connected with one end of the connecting support, the fixing shaft penetrates through the other end of the connecting support and extends into an inner cavity of the fixing beam, and the fixing beam and the fixing shaft rotate relatively, so that the problems that the fixing beam and the swing beam of the textile machine move independently and are affected by warp elasticity, and the rear beam shakes and the rotating speeds are different are solved. Therefore, the tension of the weaving machine during beating-up is not stable, and the quality of cloth is affected.

Description

Technical Field

[0001] The invention relates to the technical field of textile equipment, and in particular to a rotary back beam and a loom. Background Art

[0002] In the process of producing grey fabric on a loom, the different positions of the back beam will affect the tension of the warp yarn, and thus affect the quality of the fabric. For example, when weaving fine yarn and high-density fabric, the back beam moves forward, the tension of the warp yarn increases, which is conducive to opening and clearing the shed. The back beam includes a swinging beam and a fixed beam. The swinging beam and the fixed beam of the current equipment operate independently. When the warp yarn passes through the swinging beam and the fixed beam, due to the influence of the tension of the warp yarn itself, the warp yarn exerts a pulling force on the swinging beam and the fixed beam, causing the swinging beam and the fixed beam to rotate at different speeds or even reverse. At this time, the back beam vibrates as a whole, and the force received by the warp sand is not only affected by the opening movement, resulting in the tension of the warp yarn during the beating of the weft being affected by the opening movement and the irregular vibration of the back beam, making the tension during the beating of the weft unstable. When weaving fabrics that are sensitive to tension, hidden spots will appear on the surface of the fabric, affecting the quality of the grey fabric produced.

[0003] In summary, it can be seen that developing a rotating rear beam that ensures stable rotation of the fixed beam and the swing beam and avoids vibration of the rear beam is an urgent problem to be solved by technical personnel in this field. Summary of the invention

[0004] The purpose of the present invention is to provide a rotating back beam and a loom, which solves the technical problem that the back beam is affected by the elasticity of the warp yarn, resulting in different rotation speeds of the fixed beam and the swing beam, causing the back beam to vibrate as a whole and affecting the quality of the cloth.

[0005] To achieve the above-mentioned purpose, the present invention provides a rotating rear beam, characterized in that it includes a driving gear, which drives a first driven gear and a second driven gear through a transmission gear, the first driven gear is fixedly connected to the inner cavity of the fixed beam, the second driven gear is fixedly connected to the end of the swing beam, the swing beam is rotatably connected to one end of a connecting support, a fixed shaft is passed through the other end of the connecting support, the fixed shaft extends into the inner cavity of the fixed beam, and the fixed beam and the fixed shaft rotate relative to each other.

[0006] Preferably, a connecting hole and a connecting groove are provided on the connecting support, a fixed shaft is passed through the connecting hole, a first bearing is clamped between the fixed beam and the fixed shaft, the swinging beam extends into the installation groove, and a second bearing is clamped between the swinging beam and the inner wall of the installation groove. The fixed beam and the swinging beam can rotate relative to the connecting support, and the rotation axes of the two are parallel and perpendicular to the connecting support.

[0007] Preferably, the first driven gear is arranged between the mounting support and the end face of the fixed beam, and a cylindrical cylinder is extended along the axial direction of the end face of the first driven gear, and the cylindrical cylinder extends into the fixed beam, and the outer wall of the cylindrical cylinder is fitted with the inner wall of the fixed beam. A fixing hole is provided on the end face of the first driven gear and passes through the side wall of the cylindrical cylinder. A conical sleeve is provided at the end of the fixing hole, and the fixing hole extends and passes through the conical sleeve. The end face of the conical sleeve in contact with the fixing hole is an inclined surface, and a fixing bolt is provided in the fixing hole. The fixing bolt is screwed toward the side extending into the inner cavity of the fixed beam, and the fixing hole abuts against the inclined surface of the conical sleeve and slides, and the side wall of the conical sleeve moves toward the outer circumference of the fixed beam, and the conical sleeve is tightened between the side wall of the fixed beam and the cylindrical cylinder, and the conical sleeve is fixedly connected to the fixed beam.

[0008] Preferably, the swing beam tapers toward one end close to the connecting support and forms a step surface, the tapered portion of the swing beam is passed through the inner holes of the second driven gear and the second bearing, the tooth diameter of the second driven gear is larger than the aperture of the mounting slot, the second driven gear is clamped between the step surface and the end face of the mounting slot, a connecting piece is passed through the end face of the second driven gear, the end of the connecting piece extends into the step surface, and the connecting piece fixedly connects the second driven gear to the swing beam.

[0009] Preferably, a mounting seat is provided on the side wall of the connecting support, and the mounting seat includes a first folding plate and a second folding plate, the first folding plate is perpendicular to the second folding plate, the first folding plate is in contact with the side wall of the connecting support, a fixing pin is passed through the first folding plate, the fixing pin connects the connecting support and the mounting seat, and a transmission gear and a driving gear are rotatably provided on the side wall of the second folding plate, the transmission gear is respectively meshed with the first driven gear and the second driven gear, and the first driven gear and the second driven gear drive the fixed beam and the swing beam to rotate.

[0010] Preferably, a reducer is provided on the side of the second folding plate away from the transmission gear, the driving gear is connected to the gear shaft in the reducer, a motor is provided on the side wall of the reducer, the motor is connected to the input shaft of the reducer, and the motor is used to provide power.

[0011] Preferably, a positioning sleeve is provided between the first driven gear and the fixed shaft, the length of the positioning sleeve is greater than the length of the first driven gear, the positioning sleeve extends out of the fixed beam port and abuts against the connecting support, so that the first driven gear and the support are set at a distance, and an annular boss extends from the end face of the second driven gear close to the mounting groove, and the annular boss abuts against the end face of the second bearing, so that the second driven gear and the mounting groove are set at a distance.

[0012] Preferably, a retaining ring is provided at one end of the fixed shaft away from the first bearing, the retaining ring abuts against the first bearing, and the retaining ring is used to determine the relative position of the fixed shaft and the fixed beam.

[0013] Preferably, one end of the fixed shaft away from the fixed beam is connected to a bracket, and the bracket fixes the fixed beam to the wall panel.

[0014] A loom comprises the above-mentioned rotating back beam.

[0015] With respect to the above-mentioned background technology, the rotating rear beam provided by the present invention includes a driving gear, which is meshed with a transmission gear, and the transmission gear is meshed with a first driven gear and a driven gear, and the rotating shafts of each gear are parallel to each other. One end face of the first driven gear is sleeved in the port of the fixed beam, and a tapered sleeve is provided in the fixed beam. After the first driven gear extends into the fixed beam, the end face of the first driven gear increases the size of the tapered sleeve, and the tapered sleeve tightens the first driven gear and the fixed beam. The first driven gear rotates synchronously with the fixed beam, and the second driven gear is fixedly connected to the swing beam, and the second driven gear also drives the swing beam to move synchronously. In addition, the swing beam is provided with a second driven gear, one end of which extends into a connecting support, and the swing beam rotates relative to the connecting support, and the other end of the connecting support A fixed shaft is passed through the end, and the fixed shaft extends into the inner cavity of the fixed beam. The fixed beam and the fixed shaft rotate relatively. During the operation of the driving gear, the power is transmitted from the driving gear to the transmission gear, and the transmission gear drives the fixed beam and the swing beam provided with the first gear and the second gear to rotate. The transmission gear meshes with the first driven gear and the second driven gear through teeth. The rotation speeds of the first driven gear and the second driven gear are determined by the transmission gear. That is, when the warp yarn generates a pulling force on the fixed beam and the swing beam, the first driven gear and the second driven gear have the same rotation speed and do not change. The first driven gear and the second driven gear are respectively meshed with transmission gears. The distance between the first driven gear and the second driven gear is determined, and no vibration occurs between the fixed beam and the swing beam connected to the two. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0017] Figure 1 A cross-sectional view of a rotating rear beam provided by an embodiment of the present invention;

[0018] Figure 2 A rear view provided for an embodiment of the present invention;

[0019] Figure 3 A front view provided for an embodiment of the present invention;

[0020] Figure 4 A partial enlarged view of region A provided in an embodiment of the present invention;

[0021] Figure 5 An internal cross-sectional view of a reducer provided by an embodiment of the present invention;

[0022] Figure 6This is a partial enlarged view of area B provided in an embodiment of the present invention.

[0023] Among them, 1-connecting support; 2-fixed shaft; 3-fixed beam; 4-swinging beam; 5-first driven gear; 6-taper sleeve; 7-second driven gear; 8-mounting seat; 9-reducer; 10-motor; 11-transmission gear; 12-driving gear; 13-gear shaft; 14-positioning sleeve; 15-first bearing; 16-second bearing; 17-annular boss. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] In order to enable those skilled in the art to better understand the scheme of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0026] The present invention provides a rotating rear beam, as shown in the attached specification Figure 1 To Attachment Figure 3The driving gear 12 outputs power for the transmission gear 11. The transmission gear 11 meshes with the first driven gear 5 and the second driven gear 7. The first driven gear 5 and the second driven gear 7 have the same rotation speed. One side end face of the first driven gear 5 extends into the inner cavity of the fixed beam 3. A taper sleeve 6 is provided in the inner cavity of the fixed beam 3. When the first driven gear 5 penetrates into the fixed beam 3, the first driven gear 5 is connected to the taper sleeve 6 and the size of the taper sleeve 6 becomes larger. The taper sleeve 6 is tightened in the inner cavity of the fixed shaft 2. The side wall of the taper sleeve 6 is close to the inner wall of the fixed beam 3. The taper sleeve 6 fixes the first driven gear 5 to the fixed beam 3. The second driven gear 7 is fixedly connected to the swing beam 4. The swing beam 4 rotates together with the second driven gear 7. One end of the swing beam 4 connected to the second driven gear 7 extends into the connecting support 1. The swing beam 4 can rotate relative to the connecting support 1. The other end of the connecting support 1 is penetrated by a fixed shaft 2. In addition, the fixed shaft 2 also extends into the inner cavity of the fixed beam 3, and the fixed beam 3 can rotate relative to the fixed shaft 2. When the driving gear 12 is running, the driving gear 12 drives the transmission gear 11 to rotate. When the warp yarn is transmitted by the fixed beam 3 and the swinging beam 4, the warp yarn pulls the fixed beam 3 or the swinging beam 4 through its own tension. Since the first driven gear 5 and the second driven gear 7 are respectively engaged with the transmission gear 11, the first driven gear 5 and the second driven gear 7 have the same rotation speed, and the rotation speed is only determined by the transmission gear 11. In addition, the first driven gear 5 and the second driven gear 7 are both engaged with the transmission gear 11, that is, the relative positions of the first driven gear 5, the second driven gear 7 and the transmission gear 11 are determined, and the fixed beam 3 connected to the first driven gear 5 and the second driven gear 7 and the swinging beam 4 are determined. That is to say, no vibration occurs between the fixed beam 3 and the swinging beam 4, thereby improving the qualified rate of the output cloth embryo.

[0027] It should be noted that a connecting hole and a connecting groove are provided on the connecting support 1, wherein the connecting hole is used to set the fixed shaft 2, one end of the fixed shaft 2 extends into the fixed beam 3 and clamps the first bearing 15 with the inner wall of the fixed beam 3, and the first bearing 15 is used to realize the rotation of the fixed shaft 2 in the fixed beam 3, and a second bearing 16 is provided in the connecting groove, and the end of the swinging beam 4 extends into the connecting groove and cooperates with the inner hole of the second bearing 16, and the second bearing 16 is used to realize the rotation of the swinging beam 4 relative to the connecting groove. In addition, the rotation axes of the swinging beam 4 and the fixed beam 3 are parallel to each other, and the rotation axes are perpendicular and parallel to the connecting support 1.

[0028] Furthermore, the first driven gear 5 is arranged between the connecting support 1 and the end face of the fixed beam 3. The end face of the first driven gear 5 is away from the connecting support 1. A cylindrical tube is extended along the axis direction of the first driven gear 5. The cylindrical tube is used to extend into the inner cavity of the fixed beam 3. The outer wall of the cylindrical tube can fit with the inner wall of the fixed beam 3. In order to ensure that the first driven gear 5 can drive the fixed beam 3 to rotate, a fixing hole is provided on the end face of the first driven gear 5. The axis of the fixing hole is parallel to the axis of the first driven gear 5. The fixing hole extends from the end face of the first driven gear 5 and passes through the side wall of the cylindrical tube. Please refer to the attached manual for details. Figure 4 A cone sleeve 6 is provided at the end of the fixing hole, and the fixing hole continues to extend to penetrate the cone sleeve 6. The end faces of the first driven gear 5 and the cone sleeve 6 that abut against each other are inclined surfaces that fit each other. The direction in which the inclined surface size is reduced is the direction close to the port of the fixed beam 3. A fixing bolt is provided in the fixing hole, and the length of the fixing bolt is greater than the length of the first driven gear, that is, part of the fixing bolt extends out of the inclined surface of the first driven gear 5 and is screwed into the fixing hole of the cone sleeve 6. In the process of screwing the fixing bolt into the fixing hole of the cone sleeve 6, the fixing bolt generates a force in opposite directions on the cone sleeve 6 and the first driven gear 5. This force The force is applied to the inclined surface where the cone sleeve 6 abuts against the first driven gear 5. At this time, the inclined surface of the cone sleeve 6 drives the side wall of the cone sleeve 6 to have a tendency to move toward the periphery of the fixed beam 3, so that the thickness of the side wall of the cone sleeve 6 increases. Since the first driven gear 5 is a rigid material and does not deform, and the distance between the fixing hole and the side wall of the fixed beam 3 remains unchanged, the thickness of the side wall of the cone sleeve 6 increases, and the side wall of the cone sleeve 6 fits tightly with the inner wall of the fixed beam 3. The cone sleeve 6 is tightened and fixed in the fixed beam 3. Similarly, the first driven gear 5 connected to the cone sleeve 6 by the fixing bolts is fixedly connected to the swing beam 4.

[0029] Please refer to the instruction manual Figure 1 The end of the swing beam 4 tapers toward one end close to the connecting support 1, so that the tapered part forms a step surface on the swing beam 4, and the tapered part of the swing beam 4 can pass through the second driven gear 7 and the second bearing 16, and fit the inner walls of the two, wherein the tooth diameter of the second driven gear 7 is larger than the diameter of the mounting groove, and the outer diameter of the second bearing 16 is equal to the diameter of the mounting groove, that is, the second peripheral bearing is tightly embedded in the mounting groove, and the second driven gear 7 is blocked at the outside of the mounting groove port, and the second driven gear 7 is arranged between the step surface and the mounting groove port. In addition, a connecting piece is passed through the end surface of the second driven gear 7, and the connecting piece passes through the second driven gear 7 so that its end passes through the step surface, and the second driven gear 7 is fixedly connected to the swing beam 4. When the second driven gear 7 rotates, the swing beam 4 can move synchronously therewith, and the second driven gear 7 sleeved at the end of the swing beam 4 ensures that the rotation process of the swing beam 4 is stable and reliable.

[0030] Please refer to the instruction manual Figure 3A mounting seat 8 is provided on the side wall of the connecting support 1, and the mounting seat 8 includes a first folding plate and a second folding plate. The first folding plate and the second folding plate are perpendicular to each other. The side wall of the first folding plate is in contact with the side wall of the connecting support 1, and a fixing pin is passed through the first folding plate to fix the mounting seat 8 to the connecting support 1. A driving gear 12 and a transmission gear 11 are rotatably provided on the side wall of the second folding plate. The driving gear 12 is arranged obliquely above the transmission gear 11 and meshes with the transmission gear 11. The first driven gear 5 and the second driven gear 7 are respectively meshed below the transmission gear 11, and the first driven gear 5 and the second driven gear 7 are arranged at intervals. The driving gear 12 transmits power to the transmission gear 11, and drives the first driven gear 5 and the second driven gear 7 to rotate through the transmission gear 11, so that the fixed beam 3 and the swing beam 4 connected thereto rotate.

[0031] Please refer to the instruction manual Figure 2 With attached Figure 3 A reducer 9 is provided on one side wall of the second folding plate away from the transmission gear 11. The rotating shaft of the driving gear 12 passes through the second folding plate and extends into the reducer 9. The rotating shaft of the driving gear 12 is connected to the gear shaft 13 of the reducer 9. In addition, a motor 10 is provided on the side wall of the reducer 9. The motor 10 is connected to the input shaft of the reducer 9. The motor 10 runs to provide power for the reducer 9. The reducer 9 adjusts the input shaft speed according to a certain proportion, and transmits the appropriate speed to the driving gear 12 through the gear shaft 13.

[0032] Please refer to the instruction manual Figure 4 With attached Figure 6 A positioning sleeve 14 is clamped between the first driven gear 5 and the fixed shaft 2. The length of the positioning sleeve 14 along the axial direction of the fixed shaft 2 is greater than the length of the first driven gear 5. That is, after the end faces of one side of the first driven gear 5 and the positioning sleeve 14 abut against the end face of the first bearing 15, the positioning sleeve 14 extends out of the port of the first driven gear 5 away from the first bearing 15, and the positioning sleeve 14 abuts against the end face of the connecting support 1. In other words, the first driven gear 5 is spaced apart from the connecting support 1, and the connecting support 1 is restricted to the outside of the fixed beam 3 by the positioning sleeve 14, so as to prevent the first driven gear 5 from rotating during rotation. In the process, it contacts with the connecting support 1, causing wear of the parts. Similarly, the end face of the second driven gear 7 is extended with an annular boss 17 along the axial direction of the second driven gear 7 to the side close to the second driven gear 7. The annular boss 17 is coaxially arranged with the second driven gear 7, and the size of the annular boss 17 is much smaller than the diameter of the second driven gear 7. The annular boss 17 abuts against the end face of the second bearing 16. The annular boss 17 can rotate with the second bearing 16, and no relative movement occurs between the two. The annular boss 17 sets the distance between the second driven gear 7 and the end face of the mounting groove to avoid wear between the parts.

[0033] In addition, the fixed shaft 2 is connected to a bracket at one end away from the connecting support 1, and the bracket is used to connect the wall panel. The fixed shaft 2 sets the rotating rear beam as a whole on the target workstation through the bracket.

[0034] Correspondingly, the present invention also provides a loom, which is provided with the above-mentioned rotating rear beam. When the rear beam rotates and operates, the motor 10 operates to output power to the reducer 9, and the reducer 9 outputs the adjusted speed to the driving gear 12. The driving gear 12 drives the transmission gear meshed with it, and the transmission gear 11 drives the first driven gear 5 and the second driven gear 7 to rotate respectively. Similarly, the fixed beam 3 and the swing beam 4 rotate accordingly. Since the first driven gear 5 and the second driven gear 7 are meshed with the transmission gear 11, the relative positions of the three after meshing are determined, that is, the spacing between the first driven gear 5 and the second driven gear 7 remains unchanged. Therefore, when the warp yarn applies tension to the swing beam 4 and the fixed beam 3, the spacing between the swing beam 4 and the fixed beam 3 remains unchanged, and the rotating rear beam does not shake. In addition, the rotation speeds of the first driven gear 5 and the second driven gear 7 are determined by the transmission gear 11. The transmission gear 11 makes the rotation speeds of the two always the same, and the change of the warp tension will no longer cause different loom speeds or reverse rotation of the rear beam.

[0035] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0036] The principles and implementation methods of the present invention are described in this article using specific examples. The description of the above embodiments is only used to help understand the method and core ideas of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the scope of protection of the present invention.

Claims

1. A rotating rear beam, characterized in that: The invention comprises a driving gear (12), wherein the driving gear (12) drives a first driven gear (5) and a second driven gear (7) via a transmission gear (11), wherein the first driven gear (5) is fixedly connected to the inner cavity of a fixed beam (3), and the second driven gear (7) is fixedly connected to the end of a swing beam (4), and the swing beam (4) is rotatably connected to one end of a connecting support (1), and a fixed shaft (2) is passed through the other end of the connecting support (1), and the fixed shaft (2) extends into the inner cavity of the fixed beam (3), and the fixed beam (3) and the fixed shaft (2) rotate relative to each other.

2. The rotating rear beam according to claim 1, characterized in that: The connecting support (1) is provided with a connecting hole and a connecting groove, the fixing shaft (2) is passed through the connecting hole, a first bearing (15) is clamped between the fixing beam (3) and the fixing shaft (2), the swing beam (4) extends into the installation groove, a second bearing (16) is clamped between the swing beam (4) and the inner wall of the installation groove, the fixing beam (3) and the swing beam (4) can rotate relative to the connecting support (1), and the rotation axes of the two are parallel and perpendicular to the connecting support (1).

3. The rotating rear beam according to claim 2, characterized in that: The first driven gear (5) is arranged between the mounting support and the end face of the fixed beam (3); a cylindrical tube is extended along the axial direction of the end face of the first driven gear (5); the cylindrical tube extends into the fixed beam (3); the outer wall of the cylindrical tube is in contact with the inner wall of the fixed beam (3); a fixing hole is provided on the end face of the first driven gear (5) and passes through the side wall of the cylindrical tube; a tapered sleeve (6) is provided at the end of the fixing hole; the fixing hole extends and passes through the tapered sleeve (6); the end face of the tapered sleeve (6) in contact with the fixing hole is an inclined surface; a fixing bolt is provided in the fixing hole; the fixing bolt is screwed toward the side extending into the inner cavity of the fixed beam (3); the fixing hole abuts against the inclined surface of the tapered sleeve (6) and slides; the side wall of the tapered sleeve (6) moves toward the outer circumference of the fixed beam (3); the tapered sleeve (6) is tightened between the side wall of the fixed beam (3) and the cylindrical tube; the tapered sleeve (6) is fixedly connected to the fixed beam (3).

4. The rotating rear beam according to claim 2, characterized in that: The swing beam (4) tapers toward one end close to the connecting support (1) to form a step surface. The tapered portion of the swing beam (4) is inserted into the inner holes of the second driven gear (7) and the second bearing (16). The tooth diameter of the second driven gear (7) is larger than the hole diameter of the mounting slot. The second driven gear (7) is clamped between the step surface and the end surface of the mounting slot. A connecting piece is inserted into the end surface of the second driven gear (7). The end of the connecting piece extends into the step surface. The connecting piece fixedly connects the second driven gear (7) to the swing beam (4).

5. The rotating rear beam according to claim 4, characterized in that: A mounting seat (8) is provided on the side wall of the connecting support (1), and the mounting seat (8) comprises a first folding plate and a second folding plate, the first folding plate being perpendicular to the second folding plate, the first folding plate being in contact with the side wall of the connecting support (1), a fixing pin being passed through the first folding plate, the fixing pin connecting the connecting support (1) and the mounting seat (8), and the transmission gear (11) and the driving gear (12) being rotatably provided on the side wall of the second folding plate, the transmission gear (11) being respectively meshed with the first driven gear (5) and the second driven gear (7), and the first driven gear (5) and the second driven gear (7) driving the fixed beam (3) and the swing beam (4) to rotate.

6. The rotating rear beam according to claim 5, characterized in that: A reducer (9) is provided on the side of the second folding plate facing away from the transmission gear (11); the driving gear (12) is connected to a gear shaft (13) in the reducer (9); a motor (10) is provided on the side wall of the reducer (9); the motor (10) is connected to an input shaft of the reducer (9); and the motor (10) is used to provide power.

7. The rotating rear beam according to claim 6, characterized in that: A positioning sleeve (14) is sleeved between the first driven gear (5) and the fixed shaft (2). The length of the positioning sleeve (14) is greater than that of the first driven gear (5). The positioning sleeve (14) extends out of the end of the fixed beam (3) and abuts against the connecting support (1), so that the first driven gear (5) and the support are spaced apart. An annular boss (17) extends from the end face of the second driven gear (7) toward one end close to the mounting groove. The annular boss (17) abuts against the end face of the second bearing (16), so that the second driven gear (7) and the mounting groove are spaced apart.

8. The rotating rear beam according to claim 7, characterized in that: A retaining ring is provided at one end of the fixed shaft (2) away from the first bearing (15), the retaining ring abutting against the first bearing (15), and the retaining ring is used to determine the relative position of the fixed shaft (2) and the fixed beam (3).

9. The rotating rear beam according to claim 8, characterized in that: One end of the fixed shaft (2) facing away from the fixed beam (3) is connected to a bracket, and the bracket fixes the fixed beam (3) on the wall panel.

10. A loom, characterized in that: The invention comprises the rotating rear beam as described in any one of claims 1 to 9.

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