A transmission roller structure assembled in series

Abstract

The present invention relates to a material conveying device, and provides a transmission roller structure assembled in series, including: a wheel that directly contacts the material during operation, the wheel including: an outer contact wheel, a support frame and a main body tube; a central axis, passing through the main body tube; the ends of the two ends of the main body tube are evenly spaced with recessed grooves with symmetrical inclination angles, the edges of the ends of the main body tube close to the recessed grooves are protruding teeth with the same protruding length and matching the recessed grooves, and the ends of multiple main body tubes are embedded in the recessed grooves by the protruding teeth to achieve end-to-end interlocking connection; a constraint component, which is annular and covers the recessed grooves and the protruding teeth at the interlocking connection. The present invention realizes the interlocking connection between the ends of the wheels by arranging recessed grooves and protruding teeth at the ends of the main body tube, so that the recessed grooves and the protruding teeth are not easy to expand and deform, and at the same time, under the constraint of the constraint component, the service life of the wheel can be effectively extended.

Description

Technical Field

[0001] The invention relates to a material conveying device, in particular to a transmission roller structure assembled in series. Background Art

[0002] The application of roller transmission on the production line can be used to transport processed materials such as plates, films, and wires. In the circuit board processing industry, the sheet material on the production line is basically transported by transmission rollers. In some transmission lines, a special transmission roller structure is used, such as Figure 1 and Figure 2 As shown, there is a kind of transmission roller that can be assembled in the existing transmission rollers, which mainly includes a roller and a transmission rod that are integrally formed by an injection molding process, a sleeve extending outward is provided in the middle of the roller, and connecting notches that match each other are opened at both ends of the sleeve, and multiple rollers are inserted on the transmission rod and fixed into a whole through the connecting notches. During the use of the above-mentioned roller, because the two connecting notches opened at both ends of the sleeve are engaged with each other, when the roller is rotating to transmit materials, a single roller or multiple rollers in a part are subjected to greater pressure, which will cause the sleeve part at the connecting notch to be subjected to asynchronous tangential force, thereby causing the connecting notch that originally acts to engage the multiple rollers together to crack or expand, and the roller will be damaged after a long time. Summary of the invention

[0003] The present invention aims to solve the technical problems existing in the above-mentioned prior art. To this end, the present invention provides a transmission roller structure assembled in series.

[0004] To achieve the above-mentioned purpose, the present invention provides a transmission roller structure assembled in series, comprising: a wheel that directly contacts the material when working, the wheel comprising: an outer contact wheel, a support frame and a main body tube, the support frame is provided with multiple on the inner ring of the outer contact wheel and extends toward the center of the circle together, and the extended end of the support frame is connected to the outer side wall of the main body tube; a central axis passing through the main body tube; the ends of both ends of the main body tube are evenly spaced with recessed grooves with symmetrical inclination angles, and the edges of the ends of the main body tube close to the recessed grooves are protruding teeth with the same protruding length and consistent with the recessed grooves, after the multiple wheels are passed through the central axis, the ends of the multiple main body tubes are embedded in the recessed grooves through the protruding teeth to perform end-to-end interlocking connection; a restraining component, which is annular and covers the interlocking connection between the recessed grooves and the protruding teeth.

[0005] As a further improvement of the scheme, the restraining component includes: an annular ring sleeve portion integrally formed with the main body tube is circumferentially arranged around the end portion on one side of the main body tube, the recessed groove at the end portion is integrally formed with the ring sleeve portion to form an oblique wing groove, and the protruding teeth are embedded in the oblique wing groove for end-to-end interlocking connection.

[0006] As a further improvement of the scheme, the constraint component includes: a first constraint tube, which is movably and closely mounted on the main body tube, and after the ends of the plurality of main body tubes are embedded in the recessed grooves by the protruding teeth for end-to-end interlocking connection, the recessed grooves and the protruding teeth interlocking connections are wrapped by the first constraint tube.

[0007] As a further improvement of the scheme, the constraint component includes: a second constraint tube, which is movably and fittingly mounted on the main body tube, and after the ends of the plurality of main body tubes are end-to-end engaged by embedding the protruding teeth in the recessed groove, the recessed groove and the protruding teeth are wrapped by the second constraint tube, and the middle part of the second constraint tube is provided with a protruding thickened part that exceeds the thickness of the tube wall at both ends thereof by an integral molding manner, and the area of ​​the protruding thickened part is equivalent to the area where the protruding teeth are embedded in the recessed groove.

[0008] As a further improvement of the scheme, the constraint component includes: a third constraint tube, which is movably and tightly mounted on the main tube; latching protrusions, which are arranged in groups of two and are symmetrically arranged on the outer walls on both sides of the main tube; L-shaped grooves, which are arranged in groups of two and are symmetrically opened on the inner wall of the third constraint tube to allow the latching protrusions to enter from the L-shaped groove; an elastic protruding sheet-shaped obstruction portion is provided in the straight channel of the L-shaped groove, and when the main tube penetrates into the third constraint tube, the latching protrusion enters along the straight channel of the L-shaped groove and presses through the obstruction portion, and the latching protrusion enters the movable cavity opened at the end of the L-shaped groove and has a certain range of motion.

[0009] As a further improvement of the scheme, it also includes: an annular insert, which is embedded in the constraint component in an integral manner, the area of ​​the annular insert is equivalent to the area where the protruding tooth is embedded in the recessed groove, and the side wall of the annular insert is evenly provided with through holes along the circumference to help it to be integrated with the constraint component; the annular insert is one of a metal ring and a silk braided ring.

[0010] As a further improvement of the scheme, it also includes: a tightening structure, which is arranged on the central axis and located at the end positions of the two ends of the wheels after being combined in series, and the tightening structure is used to keep the multiple wheels connected in series on the central axis in a tightly fitted state.

[0011] As a further improvement of the scheme, the tightening structure includes: an internal threaded sleeve, a double-headed threaded tube and a locking nut which are sequentially inserted into the central axis, the internal threaded sleeve abuts against the end of the main tube, the double-headed threaded tube is connected to one end of the internal threaded sleeve, the other end of the double-headed threaded tube is provided with threaded sheets at intervals along the circumferential direction, the locking nut is screwed onto the threaded sheet so that the threaded sheet is tightened on the central axis, and the internal threaded sleeve rotates against the wheel.

[0012] As a further improvement of the scheme, it also includes: an end sleeve, one end of which is a flat end surface, and the other end has the recessed groove and the protruding teeth, the part with the recessed groove and the protruding teeth is provided with a restraining component, and the end sleeve is added between the internal threaded sleeve and the main body tube.

[0013] As a further improvement of the scheme, it also includes: an isolation tube, which can be optionally added between multiple wheels or between the wheels and the tightening structure in an end-to-end interlocking connection manner, both ends of the isolation tube are provided with the same recessed grooves and protruding teeth as the main tube, and the restraining component is provided at one end of the isolation tube.

[0014] The present invention brings the following effects:

[0015] 1. The present invention realizes the interlocking connection between the ends of the wheels by arranging recessed grooves and protruding teeth at the ends of the main body tube. When two adjacent wheels rotate asynchronously, the recessed grooves and the protruding teeth engage with each other to realize synchronous rotation. The contact surface between the recessed grooves and the protruding teeth is an inclined contact surface. The tangential force generated between them is converted into an oblique thrust to drive the two wheels apart due to the action of the inclined surface, so that the recessed grooves and the protruding teeth are not easy to expand and deform. At the same time, under the constraint of the constraint component, the protruding teeth will not have the problem of eversion, which can effectively extend the service life of the wheels.

[0016] 2. The annular insert added to the restraining component of the present invention can effectively improve the structural strength of the restraining component to prevent the restraining component from cracking during use, and at the same time can provide a stronger restraining effect on the engagement area of ​​the recessed groove and the protruding tooth.

[0017] 3. The tightening structure provided in the present invention can tighten the multiple wheels connected in series on the central axis from both ends, so that the multiple wheels can fit closely together and ensure that there is no gap between the wheels. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the prior art.

[0019] Figure 2 The following is a schematic diagram of disassembling the prior art.

[0020] Figure 3 It is a complete schematic diagram of the present invention.

[0021] Figure 4 It is a schematic diagram of the outer contact wheel, the support frame, the main body tube, the recessed groove and the protruding teeth of the present invention.

[0022] Figure 5 It is a schematic diagram of embodiment 1 of the present invention.

[0023] Figure 6 This is a schematic diagram of Embodiment 2 of the present invention.

[0024] Figure 7 This is a schematic diagram of embodiment 3 of the present invention.

[0025] Figure 8 This is a schematic diagram of Embodiment 4 of the present invention.

[0026] Fig. 9 It is a cross-sectional schematic diagram of the third constraint tube of the present invention.

[0027] Fig.10 It is a schematic diagram of the annular insert and the through hole of the present invention.

[0028] Fig.11 It is a schematic diagram of the tightening structure of the present invention.

[0029] The corresponding relationship between the reference numerals and the names of the components in the accompanying drawings is as follows:

[0030] 301-roller, 302-sleeve, 303-connecting notch, 304-transmission rod, 11-external contact wheel, 12-support frame, 13-main tube, 14-central axis, 21-recessed groove, 22-protruding tooth, 3-constraint component, 31-ring sleeve, 32-oblique wing groove, 41-first constraint tube, 51-second constraint tube, 52-protruding thickened portion, 61-third constraint tube, 62-clamp, 63-L-shaped groove, 64-obstruction portion, 65-movable cavity, 71-annular insert, 72-through hole, 81-isolation tube, 82-end sleeve, 83-inner threaded sleeve, 84-double-headed threaded tube, 841-threaded sheet, 85-locking nut. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. It will be appreciated that the specific embodiments described herein are only used to explain the present application, rather than to limit the present application. It should also be noted that, for ease of description, only some but not all structures related to the present application are shown in the drawings. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the art without making creative work are within the scope of protection of the present application.

[0032] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0033] Embodiment 1: The present invention specifically discloses a transmission roller structure assembled in series, such as Figure 3-Figure 11 As shown, it includes: a wheel that directly contacts with the material during operation, the wheel includes: an outer contact wheel 11, a support frame 12 and a main body tube 13, a plurality of support frames 12 are provided on the inner ring of the outer contact wheel 11 and extend toward the center of the circle together, and the ends of the extensions of the plurality of support frames 12 are connected to the outer side wall of the main body tube 13 to form a single wheel, and the plurality of wheels are connected in series through a central axis 14, and the wheels rotate with the rotation of the central axis 14, and the sheet material placed on the outer contact wheel 11 can move during the rotation process.

[0034] Among them, Figure 4As shown, the ends of both ends of the main tube 13 are evenly spaced with recessed grooves 21 with symmetrical inclination angles. The edges of the ends of the main tube 13 close to the recessed grooves 21 are protruding teeth 22 with the same protruding length and matching the recessed grooves 21. After multiple wheels are inserted into the central axis 14, the ends of the multiple main tubes 13 are embedded in the recessed grooves 21 through the protruding teeth 22 to form an end-to-end chimeric connection. For example, when two wheels are installed on the central axis 14, the recessed grooves 21 and the protruding teeth 22 at the ends are chimeric to form a tight connection. During use, if the rotation speeds of the two wheels are not synchronized, the recessed grooves 21 and the protruding teeth 22 on the two wheels will press against each other to form a tangential force perpendicular to the wall of the main tube 13. The recessed grooves 21 and the protruding teeth 22 will contact the inclined surface. And it is converted into an oblique thrust, and the generated oblique thrust will separate the two wheels from each other. At this time, it is only necessary to take corresponding fixing measures for the lateral ends of two or more wheels to prevent the wheels from separating from each other. By changing the embedding angle of the connecting end of the main tube 13 and correspondingly increasing the number of protruding teeth 22, the tangential force on the end of the main tube 13 that can cause the tube body to deform and expand will be dispersed and transferred, thereby reducing the deformation range of the end of the main tube 13. At the same time, in order to further protect the recessed groove 21 and the protruding tooth 22, a constraint component 3 is provided on the main tube 13 in this area. The constraint component 3 is annular. When in use, the constraint component 3 needs to wrap the recessed groove 21 and the protruding tooth 22. The embedded connection, so that the protruding tooth 22 will not be deformed and warped.

[0035] according to Fig.10 As shown, it also includes: an annular insert 71 is provided inside the constraint part 3, the annular insert 71 is embedded in the constraint part 3 in an integral injection molding manner, and the area of ​​the annular insert 71 in the constraint part 3 is equivalent to the area where the protruding tooth 22 is embedded in the recessed groove 21. During the use of the constraint part 3, the existence of the annular insert 71 can greatly enhance the structural strength of the constraint part 3, so that the constraint part 3 is not prone to cracking and deformation during use. The annular insert 71 is one of a metal ring and a silk braided ring. When the annular insert 71 is a metal ring, through holes 72 are evenly opened on the side wall of the metal ring along the circumferential direction, and these through holes 72 help to merge with the constraint part 3 during injection molding.

[0036] according to Figure 3 and Fig.11As shown, a tightening structure is also provided on the middle shaft 14, and the tightening structure is located at the end positions of both ends after the wheels are connected in series. The tightening structure is used to keep the multiple wheels connected in series on the middle shaft 14 in a tightly fitted state. The tightening structure includes: an internal threaded sleeve 83, a double-headed threaded tube 84 and a locking nut 85 which are sequentially inserted on the middle shaft 14. After the internal threaded sleeve 83 is inserted on the middle shaft 14, the end of one side will abut against the end of the main body tube 13, and then the double-headed threaded tube 84 is connected to one end of the internal threaded sleeve 83, and the end of the other end of the double-headed threaded tube 84 is provided with threaded sheets 841 at intervals along the circumferential direction. The locking nut 85 is screwed onto the threaded piece 841. By tightening the locking nut 85, the threaded piece 841 can be tightened onto the central axis 14. By tightening the threaded piece 841 onto the central axis 14, the double-headed threaded tube 84 can be kept fixed on the central axis 14. Subsequently, the internal threaded sleeve 83 is rotated so that the end of the internal threaded sleeve 83 is pressed against the end of the main tube 13. After tightening structural parts are provided on both sides of the central axis 14, the internal threaded sleeve 83 is rotated to make them close to each other, so that the wheels in the middle part can be tightly pressed together, so that the multiple wheels will not be separated.

[0037] according to Figure 3 and Fig.11 As shown, it also includes: an end sleeve 82 added between the internal threaded sleeve 83 and the main body tube 13, one end of the end sleeve 82 is a flat end face, one end with the flat end face faces one side of the internal threaded sleeve 83, and the other end has a recessed groove 21 and a protruding tooth 22, the portion with the recessed groove 21 and the protruding tooth 22 is provided with a restraining component 3, and the portion with the recessed groove 21 and the protruding tooth 22 is aligned and connected with the main body tube 13. Specifically, when in use, when the internal threaded sleeve 83 rotates to push toward the main body tube 13, it will first push the end sleeve 82, and the end sleeve 82 will then push the main body tube 13. The end sleeve 82, as an intermediate piece, can separate the internal threaded sleeve 83 from the main body tube 13, so that the recessed groove 21 and the protruding tooth 22 of the main body tube 13 will not directly contact the internal threaded sleeve 83 and cause damage.

[0038] according to Figure 3 and Fig.11 As shown, if it is necessary to increase the spacing between the wheels, an isolation tube 81 can be optionally added between multiple wheels or between the wheels and the tightening structure in an end-to-end interlocking manner. Both ends of the isolation tube 81 are provided with a recessed groove 21 and a protruding tooth 22 that are the same as the main tube 13, and a restraining component 3 is provided at one end of the isolation tube 81. By adding the corresponding isolation tube 81, the spacing between the wheels can be increased.

[0039] Embodiment 2: Based on Embodiment 1, Figure 5As shown, the restraining component 3 includes: an annular ring sleeve portion 31 is circumferentially arranged around the end portion on one side of the main tube 13 and is integrally formed with the main tube 13. The recessed groove 21 at the end portion is integrally formed with the ring sleeve portion 31 to form an oblique wing groove 32, and the protruding teeth 22 are embedded in the oblique wing groove 32 for end-to-end interlocking connection. The restraining component 3 is arranged at the end portion of one side of the main tube 13 and is made in an integral manner. When in use, the side of the main tube 13 with the recessed groove 21 and the protruding teeth 22 is actually inserted into the oblique wing groove 32 at the end of the other main tube 13 to complete the interlocking connection. The structure is simple and the integral molding is convenient to use.

[0040] Embodiment 3: Based on Embodiment 1, Figure 6 As shown, the restraint component 3 is a first restraint tube 41, which is movably and tightly mounted on the main tube 13 in a detachable manner. After the ends of the plurality of main tubes 13 are embedded in the recessed groove 21 through the protruding teeth 22 for end-to-end interlocking connection, the interlocking connection between the recessed groove 21 and the protruding teeth 22 is wrapped by the first restraint tube 41, thereby realizing protection of the interlocking connection between the recessed groove 21 and the protruding teeth 22.

[0041] Embodiment 4: Based on Embodiment 1, Figure 7 As shown, the constraint component 3 is a second constraint tube 51, which is movably and tightly mounted on the main tube 13. After the ends of the multiple main tubes 13 are embedded in the recessed groove 21 through the protruding teeth 22 for end-to-end interlocking connection, the recessed groove 21 and the protruding teeth 22 are wrapped by the second constraint tube 51 for connection protection. What is different from the third embodiment is that the middle part of the second constraint tube 51 is provided with a protruding thickened portion 52 that exceeds the thickness of the tube wall at both ends of itself through an integral molding method. When the annular insert 71 is embedded in the constraint component 3, the plastic area will be thinner. When in use, the annular insert 71 in the constraint component 3 is easy to wear out the plastic wrapping layer, thereby causing the annular insert 71 to be exposed. Therefore, it is necessary to set the protruding thickened portion 52 to increase the plastic thickness of the annular insert 71, and the area of ​​the protruding thickened portion 52 is equivalent to the area where the protruding teeth 22 are embedded in the recessed groove 21.

[0042] Embodiment 5: Based on Embodiment 1, Figure 8 and Fig. 9As shown, the constraint component 3 includes: a third constraint tube 61 movably and fittingly mounted on the main tube 13. Different from the third embodiment, the outer walls on both sides of the main tube 13 are provided with raised clamping protrusions 62, and the clamping protrusions 62 are arranged in groups of two and symmetrically arranged on the outer walls on both sides of the main tube 13. The inner wall of the third constraint tube 61 is provided with L-shaped grooves 63, and the L-shaped grooves 63 are arranged in groups of two and symmetrically arranged on the inner wall of the third constraint tube 61. The L-shaped grooves 63 are used to allow the clamping protrusions 62 to enter from the L-shaped grooves 63. An elastically protruding sheet-shaped obstruction portion 64 is provided in the travel channel. When the main tube 13 passes through the third constraint tube 61, the latch 62 enters along the straight travel channel of the L-shaped groove 63, and a certain force needs to be applied to squeeze the obstruction portion 64 so that it is deformed before it can enter the end of the L-shaped groove 63. The obstruction portion 64 after deformation returns to its original shape after there is no interference from the latch 62. A movable cavity 65 is provided at the end of the L-shaped groove 63. After the latch 62 enters the movable cavity 65, the entire third constraint tube 61 can have a certain range of motion. When in use, the main tube 13 is inserted into the third constraint tube 61 through the locking protrusion 62. Under the constraint of the L-shaped groove 63, a large separation gap will not be formed between the two main tubes 13, and the recessed groove 21 and the protruding teeth 22 between the two main tubes 13 can be kept in the interlocking area, avoiding the situation that the protruding teeth 22 of the two main tubes 13 are against each other; at the same time, during the rotation of the wheel, the third constraint tube 61 with a certain range of motion can adaptively adjust its position, which can effectively reduce the wear between components and internal material damage caused by rigid contact.

[0043] The above-mentioned embodiments only express the preferred implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person skilled in the art, several modifications, improvements and substitutions can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the attached claims.

Claims

1. A transmission roller structure assembled in series, comprising: A wheel that directly contacts materials during operation, the wheel comprising: an outer contact wheel (11), a support frame (12) and a main body tube (13), wherein the support frame (12) is provided with a plurality of support frames on the inner circle of the outer contact wheel (11) and extends toward the center of the circle, and the end of the support frame (12) is connected to the outer side wall of the main body tube (13); a central axis (14) passes through the main body tube (13); and the main body tube (13) is characterized in that The ends of the two ends (13) are evenly spaced with recessed grooves (21) with symmetrical inclination angles, and the edges of the ends of the main body tube (13) close to the recessed grooves (21) are protruding teeth (22) with the same protruding length and matching the recessed grooves (21). The multiple wheels are inserted into the central axis. (14), the ends of the plurality of main body tubes (13) are embedded in the recessed groove (21) through the protruding teeth (22) to achieve end-to-end interlocking connection; the restraining component (3) is annular and is arranged to cover the interlocking connection between the recessed groove (21) and the protruding teeth (22); the restraining component (3) comprises: a third restraining tube (61) movably and closely mounted on the main body tube (13); locking protrusions (62) in pairs and symmetrically arranged on the outer side walls of both sides of the main body tube (13); L-shaped grooves (63) in pairs The third restraining tube (61) is symmetrically provided with a plurality of locking protrusions (62) on the inner wall of the third restraining tube (61) to allow the locking protrusion (62) to enter from the L-shaped groove (63); an elastically protruding sheet-shaped obstruction portion (64) is provided in the straight passage of the L-shaped groove (63); when the main tube (13) penetrates into the third restraining tube (61), the locking protrusion (62) enters along the straight passage of the L-shaped groove (63) and presses through the obstruction portion (64); the locking protrusion (62) enters into the movable cavity (65) provided at the end of the L-shaped groove (63) and has a certain range of movement.

2. The transmission roller structure assembled in series according to claim 1, characterized in that: The restraining component (3) comprises: an annular ring sleeve portion (31) formed integrally with the main body tube (13) is provided circumferentially around the end portion on one side of the main body tube (13); the recessed groove (21) at the end portion is integrally formed with the ring sleeve portion (31) to form an oblique wing groove (32); the protruding teeth (22) are embedded in the oblique wing groove (32) for end-to-end interlocking connection.

3. The transmission roller structure assembled in series according to claim 1, characterized in that: The restraining component (3) comprises: a first restraining tube (41) which is movably and snugly mounted on the main tube (13); after the ends of the plurality of main tubes (13) are embedded in the recessed groove (21) through the protruding teeth (22) for end-to-end interlocking connection, the first restraining tube (41) wraps the interlocking connection between the recessed groove (21) and the protruding teeth (22).

4. The transmission roller structure assembled in series according to claim 1, characterized in that: The restraining component (3) comprises: a second restraining tube (51) which is movably and snugly mounted on the main tube (13); after the ends of the plurality of main tubes (13) are embedded in the recessed groove (21) through the protruding teeth (22) for end-to-end interlocking connection, the second restraining tube (51) wraps the interlocking connection between the recessed groove (21) and the protruding teeth (22); the middle part of the second restraining tube (51) is provided with a protruding thickened portion (52) which exceeds the thickness of the tube wall at both ends thereof by an integral molding method; the area of ​​the protruding thickened portion (52) is equivalent to the area where the protruding teeth (22) are embedded in the recessed groove (21).

5. The transmission roller structure assembled in series according to any one of claims 1 to 4, characterized in that: Also includes: An annular insert (71) is embedded in the restraining component (3) in an integrally formed manner, the area of ​​the annular insert (71) is equivalent to the area where the protruding tooth (22) is embedded in the recessed groove (21), and through holes (72) are evenly opened on the side wall of the annular insert (71) along the circumferential direction to help it merge with the restraining component (3); the annular insert (71) is one of a metal ring and a silk braided ring.

6. The transmission roller structure assembled in series according to claim 5, characterized in that: Also includes: The tightening structure is arranged on the central shaft (14) and is located at the end positions of both ends of the wheels after they are connected in series. The tightening structure is used to keep the multiple wheels connected in series on the central shaft (14) in a tightly fitted state with each other.

7. The transmission roller structure assembled in series according to claim 6, characterized in that: The tightening structure comprises: an internal threaded sleeve (83), a double-headed threaded tube (84) and a locking nut (85) which are sequentially inserted into the central axis (14); the internal threaded sleeve (83) is pressed against the end of the main tube (13); the double-headed threaded tube (84) is connected to one end of the internal threaded sleeve (83); the other end of the double-headed threaded tube (84) is provided with threaded sheets (841) at intervals along the circumferential direction; the locking nut (85) is screwed onto the threaded sheet (841) so that the threaded sheet (841) is clamped on the central axis (14); and the internal threaded sleeve (83) is rotated to press against the wheel.

8. The transmission roller structure assembled in series according to claim 7, characterized in that: Also includes: The end sleeve (82) has a flat end surface at one end and the other end having the recessed groove (21) and the protruding teeth (22). The portion having the recessed groove (21) and the protruding teeth (22) is provided with a restraining component (3). The end sleeve (82) is additionally provided between the internal thread sleeve (83) and the main body tube (13).

9. The transmission roller structure assembled in series according to claim 8, characterized in that: Also includes: The isolation tube (81) can be optionally added between the plurality of wheels or between the wheel and the tightening structure in an end-to-end interlocking manner, and both ends of the isolation tube (81) are provided with the same recessed groove (21) and the protruding teeth (22) as the main tube (13), and the restraining component (3) is provided at one end of the isolation tube (81).

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