CN220450411U - Transmission shaft of air jet loom - Google Patents

Abstract

The application discloses a transmission shaft of an air jet loom, which comprises a first rotating shaft, a second rotating shaft and a shaft sleeve; the first rotating shaft and the second rotating shaft are suitable for synchronous connection through the shaft sleeve; the corresponding end parts of the first rotating shaft and the second rotating shaft are respectively clamped with the shaft sleeve; the shaft sleeve and the first rotating shaft and the second rotating shaft are further limited by a limiting structure in the movement of the shaft sleeve along the direction of disengaging from the clamping direction. The beneficial effects of this application: through with the axle sleeve cover in first pivot or second pivot, correspond the tip of first pivot and second pivot later, carry out synchronous connection block with first pivot and second pivot through the axle sleeve this moment to make first pivot and second pivot connect, avoided adopting bolted connection, cause the axis of rotation to scrap because of the bolt fracture, reduced the wasting of resources, the better protection transmission shaft of being convenient for, and then promoted the life of transmission shaft.

Description

Transmission shaft of air jet loom

Technical Field

The application relates to the technical field of transmission shafts, in particular to a transmission shaft of an air jet loom.

Background

The air jet loom is a shuttleless loom that pulls weft yarn through a shed using an air jet. The working principle is that air is used as weft insertion medium, the ejected compressed air flow is used for generating friction traction force to pull weft yarn, the weft yarn is carried through a shed, and the purpose of weft insertion is achieved through jet flow generated by air injection; the weft insertion mode is reasonable, the weft insertion rate is higher, the operation is simple and safe, the weft insertion device has the advantages of wider variety adaptability, high efficiency, low noise and the like, and becomes one of the most promising novel cloth machines.

The existing air jet loom is generally connected with a bolt through a screw hole when the transmission shaft and the rotation shaft are connected, when the transmission shaft rotates, the shearing force born by the bolt is large, so that the bolt can be bent, the bent bolt can be broken and left in the transmission shaft when the bolt is detached, the transmission shaft is scrapped, further, the resource waste is caused, the service life of the transmission shaft is reduced, and the transmission shaft of the air jet loom is required to be improved.

Disclosure of Invention

An object of the present application is to provide a transmission shaft of an air jet loom, which can prolong the service life of the transmission shaft.

In order to achieve the above purpose, the technical scheme adopted in the application is as follows: a transmission shaft of an air jet loom comprises a first rotating shaft, a second rotating shaft and a shaft sleeve; the first rotating shaft and the second rotating shaft are suitable for synchronous connection through the shaft sleeve; the corresponding end parts of the first rotating shaft and the second rotating shaft are respectively clamped with the shaft sleeve; the shaft sleeve and the first rotating shaft and the second rotating shaft are further limited by a limiting structure in the movement of the shaft sleeve along the direction of disengaging from the clamping direction.

Preferably, the shaft sleeve is adapted to be respectively engaged with the first rotating shaft and the second rotating shaft along an axial direction, so that the first rotating shaft and the second rotating shaft synchronously rotate in a circumferential direction; the limiting structure is suitable for limiting the axial movement of the shaft sleeve.

Preferably, the corresponding end parts of the first rotating shaft and the second rotating shaft are respectively provided with a connecting groove comprising an inserting section, a transition section and a clamping section; the inserting section and the clamping section extend axially and are arranged at intervals along the circumferential direction, and the inserting section and the clamping section are communicated through the transition section extending along the circumferential direction; the shaft sleeve is suitable for sliding along the insertion section and the transition section sequentially through a connecting block arranged in the shaft sleeve until being clamped with the clamping section; the spacing between the two clamping sections of the first rotating shaft and the second rotating shaft is equal to the spacing between the two transition sections, and the limiting structure is propped against the side wall of the transition section along the axial direction.

Preferably, the connecting groove on the first rotating shaft is in a Z shape, and the connecting groove on the second rotating shaft is in an upright U shape.

Preferably, the limiting structure comprises a limiting block and a threaded rod; the threaded rod is in threaded connection with the shaft sleeve, and the limiting block is positioned in the shaft sleeve and is in rotary connection with the threaded rod; the limiting block is suitable for being driven by the threaded rod to move along the radial direction of the shaft sleeve; when the connecting block slides to be clamped with the clamping section, the limiting block is suitable for moving to be propped against the transition section along the radial direction.

Preferably, the shaft sleeve is suitable for being clamped with the first rotating shaft and the second rotating shaft along an oblique direction, so that the first rotating shaft and the second rotating shaft synchronously rotate in a circumferential direction; the limiting structure is suitable for limiting the shaft sleeve to move along the oblique direction.

Preferably, the corresponding end parts of the first rotating shaft and the second rotating shaft are respectively provided with a connecting groove comprising an inserting section and a clamping section; the inserting section extends along the axial direction, and the clamping section is connected with the inserting section and is inclined to the inserting section; the shaft sleeve is suitable for being clamped by sliding from the insertion section to the clamping section through a connecting block arranged inside; the limiting structure is suitable for limiting the connecting block along the direction of disengaging the clamping.

Preferably, the number of the connecting grooves is plural, and the plurality of the connecting grooves are arranged at intervals along the circumferential direction.

Preferably, the limiting structure comprises a limiting block and a threaded rod; the threaded rod is in threaded connection with the shaft sleeve, and the limiting block is positioned in the shaft sleeve and is in rotary connection with the threaded rod; when the connecting block slides to be clamped with the clamping section, the limiting block is suitable for moving to be propped against the connecting groove along the radial direction, so that the limiting block limits the connecting block.

Preferably, the side walls of the first rotating shaft and the second rotating shaft are provided with limiting grooves intersecting the clamping section, and the limiting blocks are matched with the limiting grooves; or the limiting block is in abutting fit with the side wall of the insertion section along the circumferential direction.

Compared with the prior art, the beneficial effect of this application lies in: through with the axle sleeve cover in first pivot or second pivot, correspond the tip of first pivot and second pivot later, carry out synchronous connection block with first pivot and second pivot through the axle sleeve this moment to make first pivot and second pivot connect, avoided adopting bolted connection, cause the axis of rotation to scrap because of the bolt fracture, reduced the wasting of resources, the better protection transmission shaft of being convenient for, and then promoted the life of transmission shaft.

Drawings

Fig. 1 is a schematic diagram of the overall structure of the present utility model.

FIG. 2 is a schematic diagram of a connecting groove structure of the present utility model.

Fig. 3 is a schematic cross-sectional elevation view of the present utility model.

Fig. 4 is a schematic view of the structure of the shaft sleeve moving to the insertion section in the utility model.

Fig. 5 is a schematic diagram of a structure of a connection block and a locking section for locking in the present utility model.

FIG. 6 is a schematic view of a cross-sectional portion of a sleeve according to the present utility model.

FIG. 7 is a schematic view of another embodiment of the connecting groove of the present utility model.

Fig. 8 is a schematic structural diagram of another embodiment of the limiting groove in fig. 7 in the present utility model.

In the figure: 100. a first rotating shaft; 110. a second rotating shaft; 1. a shaft sleeve; 11. a connecting block; 2. a connecting groove; 21. an insertion section; 22. a clamping section; 23. a transition section; 3. a limit structure; 31. a threaded rod; 32. a limiting block; 33. and a limit groove.

Detailed Description

The present application will be further described with reference to the specific embodiments, and it should be noted that, on the premise of no conflict, new embodiments may be formed by any combination of the embodiments or technical features described below.

In the description of the present application, it should be noted that, for the azimuth terms such as terms "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the azimuth and positional relationships are based on the azimuth or positional relationships shown in the drawings, it is merely for convenience of describing the present application and simplifying the description, and it is not to be construed as limiting the specific protection scope of the present application that the device or element referred to must have a specific azimuth configuration and operation, as indicated or implied.

It should be noted that the terms "first," "second," and the like in the description and in the claims of the present application are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order.

The terms "comprises" and "comprising," along with any variations thereof, in the description and claims of the present application are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements that are expressly listed or inherent to such process, method, article, or apparatus.

In one preferred embodiment of the present application, as shown in fig. 1 to 8, a transmission shaft of an air jet loom includes a first rotating shaft 100, a second rotating shaft 110, and a shaft sleeve 1; the first rotating shaft 100 and the second rotating shaft 110 are synchronously connected through the shaft sleeve 1; when the corresponding ends of the first rotating shaft 100 and the second rotating shaft 110 need to be connected, at this time, the shaft sleeve 1 can be sleeved on the end position of the first rotating shaft 100, then the second rotating shaft 110 and the corresponding end of the first rotating shaft 100 are placed in the shaft sleeve 1, then the second rotating shaft 110 is pushed until the second rotating shaft is attached to the end of the first rotating shaft 100, then the shaft sleeve 1 is rotated again to enable the shaft sleeve 1 to clamp the first rotating shaft 100 and the second rotating shaft 110, then the shaft sleeve 1 can be limited along the clamping direction separating from the first rotating shaft 100 and the second rotating shaft 110 by operating the limiting structure 3 arranged in the shaft sleeve 1, and further the first rotating shaft 100 and the second rotating shaft 110 can be kept stable when being connected; be convenient for replace traditional screw thread fixed connection mode through cup jointing the fixed mode, and then avoided because of the transmission shaft is at the during operation through threaded connection, make the screw thread fracture in the transmission shaft, and then influence the use of transmission shaft, cause the transmission shaft to scrap and the waste of transmission shaft resource, be convenient for through cup jointing the protection transmission shaft that the connected mode can be better, reduce the wasting of resources, be convenient for promote the life of transmission shaft.

It will be appreciated that the arrangement of the connecting grooves 2, as shown in fig. 1 to 6, includes the following two arrangements.

Setting mode one: as shown in fig. 2 to 5, the shaft sleeve 1 may be respectively engaged with the first shaft 100 and the second shaft 110 along the axial direction, so that the shaft sleeve 1 slides along the second shaft 110 while the shaft sleeve 1 slides along the circumferential direction in the first shaft 100, until the shaft sleeve 1 moves to be engaged with the first shaft 100 and the second shaft 110, at this time, the limiting structure 3 on the shaft sleeve 1 may be adjusted, so that the limiting structure 3 limits the movement of the shaft sleeve 1 along the axial direction, thereby facilitating better improvement of the connection stability of the first shaft 100 and the second shaft 110.

It will be understood that, as shown in fig. 2 to 5, the left ends of the insertion section 21 and the engagement section 22 are set as the distal ends, and the right ends are set as the head ends; the upper end of the transition section 23 is a head end, and the lower end is a tail end.

As shown in fig. 1 to 5, the corresponding ends of the first and second rotating shafts 100 and 110 are each provided with a connection groove 2 including an insertion section 21, a transition section 23, and a snap-in section 22; the inserting section 21 and the clamping section 22 extend axially and are arranged at intervals along the circumferential direction, the inserting section 21 and the clamping section 22 are communicated through a transition section 23 extending along the circumferential direction, when the first rotating shaft 100 and the second rotating shaft 110 are required to be connected, a connecting block 11 which can be arranged on one end of the shaft sleeve 1 is inserted into the inserting section 21 from the head end of the inserting section 21 on the first rotating shaft 100, then the second rotating shaft 110 can be taken out, and the tail end of the inserting section 21 on the second rotating shaft 110 is aligned with the connecting block 11 on the other end of the shaft sleeve 1, so that the connecting block 11 on the shaft sleeve 1 can be inserted into the inserting section 21 on the second rotating shaft 110; when the corresponding ends of the first rotating shaft 100 and the second rotating shaft 110 are attached, the connecting block 11 at one end of the shaft sleeve 1 is just located at the end of the insertion section 21 of the first rotating shaft 100, the connecting block 11 at the other end of the shaft sleeve 1 is just located at the head end of the insertion section 21 of the second rotating shaft 110, at this time, the rotating shaft sleeve 1 can slide to the end of the transition section 23 along with the transition sections 23 of the connecting blocks 11 on the first rotating shaft 100 and the second rotating shaft 110 respectively, and then can enter the clamping section 22 from the end of the corresponding transition section 23 to be clamped by pushing the shaft sleeve 1 along with the connecting blocks 11 respectively; the first rotating shaft 100 and the second rotating shaft 110 are conveniently connected and limited in a sleeved mode through the shaft sleeve 1; the distance between the two engaging sections 22 of the first rotating shaft 100 and the second rotating shaft 110 is equal to the distance between the two transition sections 23, that is, in order to prevent the interference phenomenon when the shaft sleeve 1 moves to drive the engaging sections 22; the connecting block 11 can be simultaneously slid to the clamping section 22 of the first rotating shaft 100 and the second rotating shaft 110 through the movement of the shaft sleeve 1, and finally the side wall of the transition section 23 is propped against the side wall of the transition section 23 along the axial direction through the limiting structure 3, so that the shaft sleeve 1 is limited, the first rotating shaft 100 and the second rotating shaft 110 are conveniently connected, and the stable connection between the first rotating shaft 100 and the second rotating shaft 110 is further improved.

As shown in fig. 2 to 5, in the first shaft 100, the connection groove 2 on the first shaft 100 is divided into an insertion section 21, a transition section 23, and a locking section 22, wherein the insertion section 21 and the locking section 22 extend in the axial direction and are disposed at intervals in the circumferential direction; the inserting section 21 is arranged in the axial direction of the first rotating shaft 100, the transition section 23 is arranged in the circumferential direction of the first rotating shaft 100, the clamping section 22 is arranged in the axial direction of the first rotating shaft 100, the tail end of the inserting section 21 is communicated with the head end of the transition section 23, and the tail end of the transition section 23 is communicated with the head end of the clamping section 22, so that the connecting groove 2 on the first rotating shaft 100 is Z-shaped; in the second rotating shaft 110, the connecting slot 2 on the second rotating shaft 110 is divided into an inserting section 21, a transition section 23 and a clamping section 22, wherein the inserting section 21 and the clamping section 22 extend in the axial direction and are arranged at intervals along the circumferential direction, the inserting section 21 is arranged in the axial direction of the second rotating shaft 110, the transition section 23 is arranged in the circumferential direction of the second rotating shaft 110, the clamping section 22 is arranged in the axial direction of the second rotating shaft 110, the head end of the inserting section 21 is communicated with the head end of the transition section 23, and the tail end of the transition section 23 is communicated with the head end of the clamping section 22, so that the connecting slot 2 on the second rotating shaft 110 is in a vertical U shape, and when the connecting block 11 on the shaft sleeve 1 correspondingly moves to the tail end of the transition section 23, the connecting block 11 can be simultaneously moved into the corresponding clamping section 22 to carry out clamping restriction by moving the shaft sleeve 1.

As shown in fig. 2 to 6, the limit structure 3 includes a threaded rod 31 screwed on the shaft sleeve 1, and a limit block 32 rotatably mounted on the threaded rod 31, and a groove for placing the limit block 32 is formed inside the shaft sleeve 1, so as to prevent the limit block 32 from interfering with the movement and rotation of the shaft sleeve 1 when the shaft sleeve 1 moves; when the connecting block 11 slides into the corresponding clamping section 22, the threaded rod 31 can be rotated to move along the radial direction of the shaft sleeve 1 with the limiting block 32, so that the bottom end of the transition section 23 can be abutted against the bottom end of the limiting block 32, and the first rotating shaft 100 and the second rotating shaft 110 can be clamped, so that the connection stability of the first rotating shaft 100 and the second rotating shaft 110 is ensured.

Setting mode II: as shown in fig. 1, 7 to 8, the sleeve 1 may be engaged with the first and second shafts 100 and 110 in an oblique direction so that the first and second shafts 100 and 110 are synchronously rotated in a circumferential direction, and then the sleeve 1 is restricted in the direction of the oblique movement by a restriction structure 3 provided on the sleeve 1.

It will be understood that, as shown in fig. 7 to 8, the left end of the insertion section 21 is set as the end, and the right end is set as the head end; the upper end of the engaging section 22 is a head end, and the lower end is a tail end.

As shown in fig. 1, 7 to 8, in the first shaft 100, an end portion of the first shaft 100 is provided with a connection groove 2 including an insertion section 21 and a click section 22, the insertion section 21 extends in the axial direction, and a head end of the click section 22 communicates with a tip end of the insertion section 21 and is inclined to the insertion section 21; in the second rotating shaft 110, an end portion of the second rotating shaft 110 is provided with a connecting groove 2 including an insertion section 21 and a snap-in section 22, the insertion section 21 extends in the axial direction, and a head end of the snap-in section 22 communicates with a head end of the insertion section 21 and is inclined to the insertion section 21; wherein the connecting groove 2 of the first rotating shaft 100 and the connecting groove 2 of the second rotating shaft 110 are symmetrically arranged; when the first rotating shaft 100 and the second rotating shaft 110 are connected, at this time, the connecting block 11 at one end of the shaft sleeve 1 is aligned with the head end of the insertion section 21 on the first rotating shaft 100, then the connecting block is inserted into the insertion section 21, then the second rotating shaft 110 is lifted up, the tail end of the insertion section 21 is aligned with the connecting block 11 at the other end of the shaft sleeve 1, the connecting block 11 is inserted into the insertion section 21 of the second rotating shaft 110, when the corresponding ends of the first rotating shaft 100 and the second rotating shaft 110 are attached, at this time, the connecting block 11 at one end of the shaft sleeve 1 just slides to the tail end of the insertion section 21, the connecting block 11 at the other end of the shaft sleeve 1 just slides to the head end of the insertion section 21, then the shaft sleeve 1 can be rotated to synchronously bring the connecting block 11 into the clamping section 22 at the corresponding insertion section 21, and at this time, the connecting block 11 can be limited in the direction of disengaging the clamping through the limiting structure 3 on the shaft sleeve 1; facilitating a better secure connection of the first and second shafts 100 and 110.

It can be appreciated that the above two setting modes of the connecting slot 2 are suitable for the present application, and those skilled in the art can select according to practical situations, so as to facilitate the subsequent description, and the present application adopts the first setting mode.

In this embodiment, as shown in fig. 2, it can be understood that, in order to reduce the influence of the shearing force when the first shaft 100 and the second shaft 110 are operated when the shaft sleeve 1 connects the first shaft 100 and the second shaft 110, and to improve the stability of the whole device, the number of the connecting grooves 2 may be plural, and the plural connecting grooves 2 are arranged at intervals in the circumferential direction, and the connecting block 11 on the shaft sleeve 1 should be also provided with plural corresponding plural connecting grooves 2.

In this embodiment, as shown in fig. 1 to 8, the limiting structure 3 includes a threaded rod 31 connected to the shaft sleeve 1 through threads, and a limiting block 32 rotatably installed on the threaded rod 31, and a groove for placing the limiting block 32 is formed inside the shaft sleeve 1, so as to prevent the limiting block 32 from interfering with the shaft sleeve 1 when the shaft sleeve 1 moves; when the first rotating shaft 100 and the second rotating shaft 110 are connected, the connecting blocks 11 on the shaft sleeve 1 slide into the corresponding clamping sections 22 respectively, and the threaded rods 31 can be rotated at the moment, so that the limiting blocks 32 move downwards to prop against the connecting grooves 2, and further the connecting blocks 11 in the clamping sections 22 are limited; so that the connection between the first shaft 100 and the second shaft 110 is more stable.

In this embodiment, as shown in fig. 7 to 8, the arrangement of the stopper 32 of the stopper structure 3 in the connecting slot 2 in the second arrangement includes, but is not limited to, the following two arrangements.

Setting mode one: as shown in fig. 7, the side walls of the first rotating shaft 100 and the second rotating shaft 110 are provided with limit grooves 33 intersecting the clamping section 22, and the limit blocks 32 are matched with the limit grooves 33; when the connecting block 11 is limited, the limiting block 32 can be rotated into the limiting groove 33 through the threaded rod 31 and props against the bottom of the limiting groove 33, so that when the first rotating shaft 100 and the second rotating shaft 110 rotate together in the circumferential direction, the limiting block 32 interferes with the movement of the first rotating shaft 100 and the second rotating shaft 110 in the shaft sleeve 1 in the circumferential direction, and further, the first rotating shaft 100 and the second rotating shaft 110 can be kept fixed in the circumferential direction when rotating; meanwhile, the axial movement of the limiting block 32 is due to the fit interference between the connecting block 11 and the side wall of the clamping section 22, so that the limiting block 32 is stable in axial movement, and the first rotating shaft 100 and the second rotating shaft 110 are stably connected.

Setting mode II: as shown in fig. 8, the stopper 32 is fitted against the side wall of the insertion section 21 in the circumferential direction; when connecting block 11 stretches into the block section 22, can drive stopper 32 through the screw thread this moment and remove to insert section 21, the both sides of stopper 32 are laminated mutually with the both sides lateral wall of insert section 21 this moment, and then laminate mutually and then interfere connecting block 11 at the interior circumferencial direction motion of block section 22 through stopper 32 both sides and insert section 21 both sides lateral wall, and then restrict connecting block 11.

It is understood that the first setting mode and the second setting mode are suitable for the application, and those skilled in the art can select according to actual needs.

The foregoing has outlined the basic principles, main features and advantages of the present application. It will be appreciated by persons skilled in the art that the present application is not limited to the embodiments described above, and that the embodiments and descriptions described herein are merely illustrative of the principles of the present application, and that various changes and modifications may be made therein without departing from the spirit and scope of the application, which is defined by the appended claims. The scope of protection of the present application is defined by the appended claims and equivalents thereof.

Claims (10)

1. The utility model provides an air jet loom transmission shaft which characterized in that: comprises a first rotating shaft, a second rotating shaft and a shaft sleeve; the first rotating shaft and the second rotating shaft are suitable for synchronous connection through the shaft sleeve; the corresponding end parts of the first rotating shaft and the second rotating shaft are respectively clamped with the shaft sleeve; the shaft sleeve and the first rotating shaft and the second rotating shaft are further limited by a limiting structure in the movement of the shaft sleeve along the direction of disengaging from the clamping direction.

2. The air jet loom transmission shaft of claim 1, wherein: the shaft sleeve is suitable for being respectively clamped with the first rotating shaft and the second rotating shaft along the axial direction, so that the first rotating shaft and the second rotating shaft synchronously rotate in the circumferential direction; the limiting structure is suitable for limiting the axial movement of the shaft sleeve.

3. The air jet loom transmission shaft of claim 2, wherein: the corresponding end parts of the first rotating shaft and the second rotating shaft are respectively provided with a connecting groove comprising an inserting section, a transition section and a clamping section; the inserting section and the clamping section extend axially and are arranged at intervals along the circumferential direction, and the inserting section and the clamping section are communicated through the transition section extending along the circumferential direction; the shaft sleeve is suitable for sliding along the insertion section and the transition section sequentially through a connecting block arranged in the shaft sleeve until being clamped with the clamping section; the spacing between the two clamping sections of the first rotating shaft and the second rotating shaft is equal to the spacing between the two transition sections, and the limiting structure is propped against the side wall of the transition section along the axial direction.

4. A drive shaft for an air jet loom as claimed in claim 3, wherein: the connecting grooves on the first rotating shaft are Z-shaped, and the connecting grooves on the second rotating shaft are vertical U-shaped.

5. A drive shaft for an air jet loom as claimed in claim 3, wherein: the limiting structure comprises a limiting block and a threaded rod; the threaded rod is in threaded connection with the shaft sleeve, and the limiting block is positioned in the shaft sleeve and is in rotary connection with the threaded rod; the limiting block is suitable for being driven by the threaded rod to move along the radial direction of the shaft sleeve; when the connecting block slides to be clamped with the clamping section, the limiting block is suitable for moving to be propped against the transition section along the radial direction.

6. The air jet loom transmission shaft of claim 1, wherein: the shaft sleeve is suitable for being clamped with the first rotating shaft and the second rotating shaft along the oblique direction, so that the first rotating shaft and the second rotating shaft synchronously rotate in the circumferential direction; the limiting structure is suitable for limiting the shaft sleeve to move along the oblique direction.

7. The air jet loom transmission shaft of claim 6, wherein: the corresponding end parts of the first rotating shaft and the second rotating shaft are respectively provided with a connecting groove comprising an inserting section and a clamping section; the inserting section extends along the axial direction, and the clamping section is connected with the inserting section and is inclined to the inserting section; the shaft sleeve is suitable for being clamped by sliding from the insertion section to the clamping section through a connecting block arranged inside; the limiting structure is suitable for limiting the connecting block along the direction of disengaging the clamping.

8. The drive shaft of an air jet loom as claimed in claim 4 or 7, characterized in that: the number of the connecting grooves is multiple, and the connecting grooves are arranged at intervals along the circumferential direction.

9. The air jet loom transmission shaft of claim 7, wherein: the limiting structure comprises a limiting block and a threaded rod; the threaded rod is in threaded connection with the shaft sleeve, and the limiting block is positioned in the shaft sleeve and is in rotary connection with the threaded rod; when the connecting block slides to be clamped with the clamping section, the limiting block is suitable for moving to be propped against the connecting groove along the radial direction, so that the limiting block limits the connecting block.

10. The air jet loom transmission shaft of claim 9, wherein: the side walls of the first rotating shaft and the second rotating shaft are provided with limiting grooves intersecting the clamping sections, and the limiting blocks are matched with the limiting grooves; or the limiting block is in abutting fit with the side wall of the insertion section along the circumferential direction.