Closed-loop gear transmission system of radial knitting machine and transmission error calculation method of closed-loop gear transmission system

Abstract

The closed-loop gear transmission system comprises a plurality of drive plate gears distributed in the circumferential direction, the drive plate gears are divided into a plurality of rings in the axial direction and divided into a plurality of columns in the circumferential direction, and the radial distances between drive plate gear shafts in the odd number columns and drive plate gear shafts in the even number columns and the center of the knitting machine are different; each drive plate gear is meshed with other drive plate gears in the axial direction; two circles of transmission gears are arranged, the transmission gears comprise the front-side transmission gear and the rear-side transmission gear, the front-side transmission gear and the drive plate gear on the foremost side are coaxially arranged, and the rear-side transmission gear and the drive plate gear on the rearmost side are coaxially arranged; compared with the prior art, a closed-loop system is formed by the drive plate gear and the transmission gear, and is matched with the synergistic effect of annularly and uniformly distributed power input, a closed-loop transmission structure and uniformly distributed power input, so that the power is uniformly distributed among the multi-ring gears, the transmission stability is remarkably improved, the fabric weaving defects are reduced, and the product quality is improved.

Description

Technical Field

[0001] This invention relates to the field of textile machinery transmission technology, specifically to a closed-loop gear transmission system for a radial braiding machine and a method for calculating its transmission error. Background Technology

[0002] Radial braiding machines are devices that form multi-layered fabrics by interlacing yarns radially and axially, and are widely used in industries such as filter materials and composite materials. Existing multi-ring radial braiding machines typically use gear transmission systems to drive the spindles on multiple braiding rings. However, as the number of braiding rings increases, the transmission system structure becomes more complex, easily leading to problems such as unstable transmission, uneven power distribution, gear interference, or jamming, affecting fabric quality and machine reliability. Furthermore, for multi-ring closed-loop gear transmission systems, there is a lack of effective methods for analyzing and calculating transmission errors, making system optimization design difficult and hindering the achievement of high-precision transmission control. Summary of the Invention

[0003] The purpose of this invention is to address the problems of poor transmission stability, uneven power distribution, gear interference, and difficulty in calculating transmission errors in existing multi-ring radial braiding machines. To overcome these shortcomings, a closed-loop gear transmission system for radial braiding machines and a method for calculating transmission errors are proposed.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A closed-loop gear transmission system for a radial braiding machine includes a braiding machine body, the braiding body being configured as an annular spherical structure, and the braiding machine body including a braiding disc, comprising:

[0006] Multiple circumferentially distributed dial gears are used to drive the spindle movement. The dial gears are divided into multiple rings along the axial direction and multiple rows along the circumferential direction. The radial distance from the dial gear shaft to the center of the braiding machine is different for odd-numbered and even-numbered rows. The dial gears are fixed to the braiding disc by dial gear shafts. Each dial gear meshes with other dial gears in the axial direction.

[0007] Two drive gears are provided, including a front drive gear and a rear drive gear. The front drive gear is coaxial with the foremost dial gear, and the rear drive gear is coaxial with the last dial gear.

[0008] A drive motor is connected to a reducer, which is connected to the dial gear shaft via a main shaft coupling. Power is transmitted to the dial gear shaft via the reducer, and then transmitted to a ring of meshing gears in the circumferential direction via coaxial transmission gears, and finally to each dial.

[0009] As a further preferred embodiment of the present invention, the other end of the dial gear shaft passes through the braiding disc and is located close to the center, and a dial is mounted on the dial gear shaft. A plurality of dial holes are provided on the inner side of the braiding disc, and the dial holes correspond to the dials. The dials are installed in the dial holes, and spindles are provided in two adjacent track grooves. The center lines of the dial holes and the spindles all point to the center of the sphere inside the braiding machine body.

[0010] As a further preferred embodiment of the present invention, it also includes a support frame and a traction device, wherein the main body of the weaving machine is mounted on the support frame and the traction device is arranged coaxially with the main body of the weaving machine.

[0011] The two ends of the main body of the braiding machine are respectively perpendicularly connected to the bottom end of the front plate and the bottom end of the rear plate. The front plate and the rear plate are circular plates. The top end of the front plate and the top end of the rear plate are equipped with outer sealing plates. A plurality of drive motors are evenly arranged in a ring on the outer sealing plates.

[0012] The support frame includes a braiding disc support, a bottom support base, and a support base; two braiding disc supports are symmetrically installed on the outer ring of the braiding body, the braiding disc is made and installed on the bottom support base, and the support base is connected between the two bottom support bases.

[0013] As a further preferred embodiment of the present invention, the main body of the braiding machine further includes a braiding ring assembly, which includes a braiding ring support shaft, a braiding ring, a guide ring support shaft, and a guide ring. The braiding ring support shafts are equidistantly distributed and installed on the front plate and the rear plate. The braiding ring is connected to the braiding ring support shaft and the guide ring support shaft, and the guide ring is connected to the guide ring support shaft. The braiding ring, the guide ring, and the mandrel of the traction device are coaxial.

[0014] As a further preferred embodiment of the present invention, both the dial gear and the transmission gear are spur gears; the end face of the gear near the center of the ball of the braiding machine body is machined so that the tooth width at the tip circle is narrower than the tooth width at the root circle. When angular misalignment occurs, there is a risk of jamming between the top of the gear near the center of the ball of the braiding machine body and the bottom of the meshing gear.

[0015] A method for calculating the error of a closed-loop gear transmission in a radial braiding machine includes the following steps:

[0016] Calculate the real-time transmission error of a single gear, including manufacturing error and assembly error;

[0017] Calculate the average equivalent transmission error of a pair of meshing gears;

[0018] Calculate the open-loop mean equivalent transmission error of multiple pairs of gears;

[0019] The closed-loop transmission error is calculated based on the open-loop error, including the large-cycle closed-loop transmission error in both counterclockwise and clockwise directions;

[0020] The final closed-loop transmission error is the combined value of the large-cycle closed-loop errors in both directions.

[0021] As a further preferred embodiment of the present invention, the formula for calculating the closed-loop transmission error is:

[0022] Counterclockwise large-cycle closed-loop transmission error This is the weighted sum of the counterclockwise small-cycle open-loop transmission errors;

[0023] Clockwise large-cycle closed-loop transmission error This is the weighted sum of the clockwise small-cycle open-loop transmission errors;

[0024] Total closed-loop transmission error For counterclockwise large-cycle closed-loop transmission error Error of clockwise large-cycle closed-loop transmission difference.

[0025] As a further preferred embodiment of the present invention, the method is applicable to a closed-loop gear transmission system with an N+M structure, where N is the number of rings of the dial gear and M is the number of rings of the transmission gear.

[0026] The closed-loop gear transmission system for a radial braiding machine and its transmission error calculation method proposed in this invention have the following advantages compared with the prior art:

[0027] 1. This invention forms a closed-loop system with a dial gear and a transmission gear. With the help of a uniformly distributed power input, the closed-loop transmission structure and the uniformly distributed power input work together to achieve a uniform distribution of power among the multi-ring gears, which significantly improves the smoothness of transmission, reduces fabric weaving defects, and improves product quality.

[0028] 1. This invention arranges the dial gears in a mirrored, staggered manner, so that the distance from the odd-numbered and even-numbered gear shafts to the center of the braiding machine is different. This avoids meshing interference caused by adjacent gear shafts being too close, reduces equipment failure rate, ensures continuous and stable operation, improves system reliability, and reduces maintenance costs.

[0029] 2. The gears of this invention adopt a 180 / 88 degree angular meshing misalignment to ensure that the actual meshing angle is within the allowable range of involute meshing, thus ensuring smooth transmission;

[0030] 3. This invention divides transmission error into large-cycle closed-loop error and small-cycle open-loop error, and realizes quantitative evaluation of system transmission accuracy through formulaic calculation, providing a basis for dynamic adjustment and control;

[0031] 4. This invention can be extended to N+M gear arrangements. By increasing the number of gear rings, the stability of power transmission in the system is improved, and the gear arrangement can be flexibly expanded to adapt to the weaving needs of fabrics with different layers and densities, greatly improving the versatility of the equipment. There is no need to redesign the overall transmission structure for different numbers of rings, reducing the equipment research and development and manufacturing costs. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the position and structure of the dial gear of the present invention;

[0033] Figure 2 This is a schematic diagram of the position and structure of the transmission gear of the present invention;

[0034] Figure 3 This is a schematic diagram of the position and structure of the dial of the present invention;

[0035] Figure 4 This is a schematic diagram of the overall knitting machine of the present invention;

[0036] Figure 5 This is a three-dimensional schematic diagram of the main structure of the weaving machine of the present invention;

[0037] Figure 6 This is a schematic diagram of the counterclockwise small-cycle open-loop transmission of the 5+2 five-ring radial braiding machine of the present invention;

[0038] Figure 7 This is a schematic diagram of the clockwise small-cycle open-loop transmission of the 5+2 five-ring radial braiding machine of the present invention;

[0039] The meanings of the reference numerals in the diagram are as follows: 1. Drive motor; 2. Dial reducer; 3. Front plate; 4. Rear plate; 5. Outer sealing plate; 6. Track groove; 7. Dial hole; 8. Spindle; 9. Braided ring support shaft; 10. Braided ring; 11. Guide ring support shaft; 12. Guide ring; 13. Core mold; 14. Braided disc support; 15. Bottom support seat; 16. Support base; 17. Dial; 18. Dial gear; 19. Front transmission gear; 20. Rear transmission gear; 21. Dial gear shaft. Detailed Implementation

[0040] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0041] Example 1: Combining Figure 1-2 A closed-loop gear transmission system for a radial braiding machine includes a braiding machine body, wherein the braiding machine body is configured as an annular spherical structure, and both the inner and outer surfaces of the braiding machine body are spherical. The braiding machine body has a center, and with this center as the center of the sphere, the braiding machine body includes a braiding disc.

[0042] Multiple circumferentially distributed dial gears 18 drive the spindle 8. The dial gears 18 are divided into multiple rings axially and multiple rows circumferentially. The radial distance from the dial gear shafts 21 of odd-numbered and even-numbered rows to the center of the braiding machine is different. The dial gears 18 are fixed to the braiding disc via the dial gear shafts 21. Each dial gear 18 meshes with other dial gears 18 axially. The distance between each row of dial gears 18 and the center of the braiding machine body is staggered in odd and even order; that is, all odd-numbered rows of dial gears 18 are equidistant from the center of the braiding machine body, and all even-numbered rows are equidistant, but the distances between the odd and even rows are not equidistant to the center of the braiding machine body. This is to prevent the gear shafts of the odd and even rows from becoming too close, which could cause the gears to lock up.

[0043] Two drive gears are provided, including a front drive gear 19 and a rear drive gear 20. The front drive gear 19 is coaxially arranged with the foremost dial gear 18, and the rear drive gear 20 is coaxially arranged with the rearmost dial gear 18.

[0044] A drive motor 1 is connected to a reducer 2, which is connected to a dial gear shaft 21 via a main shaft coupling. Power is transmitted from the reducer 2 to the dial gear shaft 21, and then to a ring of meshing gears in the circumferential direction via coaxial transmission gears, and finally to each dial.

[0045] Taking the 5+2 closed-loop gear transmission system as an example, the system consists of 5 rings and 88 columns, totaling 440 dial gears 18 connected to the dial 17, and 2 rings and 264 columns, totaling 528 transmission gears coaxial with the dial gears 18 of the front and rear rings. When the equipment is extended to N rings, the number of transmission gears can be appropriately increased to make the power transmission of the equipment more stable, i.e., the N+M closed-loop gear transmission system, where N is the number of dial gear 18 rings and M is the number of transmission gear rings.

[0046] In the 5+2 closed-loop gear transmission system, spur gears are used. The special arrangement of the radial annular closed-loop gears causes a certain angle of angular meshing misalignment in the spur gears. Calculating the actual meshing angle at an angular meshing misalignment of 180 / 88 degrees shows that the actual meshing angle is within the range required for involute meshing. Therefore, this angularly misaligned gear conforms to the involute meshing mode of spur gears. By definition, the meshing line of a gear is obtained by tangent to the base circles of both gears through the node. When a pair of gears mesh, numerous meshing lines are drawn on the tooth width S to form a curved surface. This curved surface is the meshing plane of the angularly misaligned gear, and the real-time transmission error of the closed-loop gear can be calculated through this plane. The spur gear is configured with a variable tooth width structure. The end face near the center of the ball in the braiding machine body is machined to make the tooth width at the addendum circle narrower than the tooth width at the root circle. When angular misalignment occurs, there is a risk of jamming between the top of the gear near the center of the ball in the braiding machine body and the bottom of the meshing gear.

[0047] The invention also includes a support frame and a traction device. The main body of the weaving machine is mounted on the support frame, and the traction device is arranged coaxially with the main body of the weaving machine.

[0048] The two ends of the main body of the braiding machine are respectively perpendicularly connected to the bottom end of the front plate 3 and the bottom end of the rear plate 4. The front plate 3 and the rear plate 4 are annular plates. The top end of the front plate 3 and the top end of the rear plate 4 are equipped with outer sealing plates 5. A plurality of drive motors 1 are evenly arranged in a ring on the outer sealing plates 5. Figure 5 As shown.

[0049] The support frame includes a braiding disc support 14, a bottom support 15, and a support base 16; two braiding disc supports 14 are symmetrically installed on the outer ring of the braiding body, the braiding discs are mounted on the bottom support 15, and the support base 16 connects the two bottom support 15. Figure 4 As shown.

[0050] In this invention, the other end of the dial gear shaft 21 passes through the braiding disc and is positioned close to the center. A dial 17 is mounted on the dial gear shaft 21. Several dial holes 7 are provided on the inner side of the braiding disc, each corresponding to a dial 17. The dial 17 is installed within the dial holes 7. Spindles 8 are positioned within two adjacent track grooves 6. The center lines of the dial holes 7 and the spindles 8 all point towards the center of the sphere inside the braiding machine body. Figure 3 As shown.

[0051] Taking the 5+2 closed-loop gear transmission system as an example, the inner ring surfaces of the front plate 3 and the rear plate 4 are machined with 88×5 grooves distributed along the axial and circumferential directions. The 5 grooves distributed along the axial direction are defined as a column, and the 88 columns of grooves are distributed along the circumferential direction. The 88 grooves distributed along the circumferential direction at the same axial position are defined as a ring, and there are a total of 5 rings of grooves. Each dial 17 corresponds to one groove. The dial gear 18 and the front and rear transmission gears 20 form a 5+2 closed-loop gear transmission system. The dial 17 is connected to the 5+2 closed-loop gear transmission system. Power is transmitted from the 5+2 closed-loop gear transmission system to the dial 17, and then from the dial 17 to the spindle 8.

[0052] In this invention, the main body of the braiding machine further includes a braiding ring 10 assembly. The braiding ring 10 assembly includes a braiding ring support shaft 9, a braiding ring 10, a guide ring support shaft 11, and a guide ring 12. The braiding ring support shafts 9 are equidistantly distributed and mounted on the front plate 3 and the rear plate 4. The braiding ring 10 is connected to the braiding ring support shaft 9 and the guide ring support shaft 11. The guide ring 12 is connected to the guide ring support shaft 11, and the braiding ring 10, the guide ring 12, and the mandrel 13 of the traction device are coaxial. Figure 4 As shown.

[0053] Example 2: A method for calculating the error of a closed-loop gear transmission in a radial braiding machine, comprising the following steps:

[0054] Calculate the real-time transmission error of a single gear, including manufacturing error and assembly error.

[0055] Real-time transmission error of a single gear Manufacturing errors Assembly error composition,

[0056] ;

[0057] ;

[0058] ;

[0059] In the formula The angle between the line of engagement and the two axes. ;in For gear module, This refers to the number of teeth on the gear. For gear pressure angle, The distance from the center of the sphere inside the knitting machine body to the gear. This refers to the meshing misalignment angle.

[0060] Calculate the mean equivalent transmission error of a pair of meshing gears. .

[0061] In the formula For wheels The error, For wheels The radius of the pitch circle.

[0062] Calculate the open-loop mean equivalent transmission error of multiple pairs of gears. .

[0063] ,

[0064] In the formula For the first For the transmission error of the gear pair, For the first root shaft to The transmission ratio of the root shaft.

[0065] Calculate the closed-loop transmission error based on the open-loop error, including the large-cycle closed-loop transmission error in both counterclockwise and clockwise directions. and .

[0066] Taking a 5+2 closed-loop gear transmission system as an example, the transmission error is divided into large-cycle closed-loop transmission error and small-cycle closed-loop transmission error. The closed-loop transmission error between the corresponding dial gear shafts of motor A and motor B is divided into: the counterclockwise small-cycle open-loop transmission error formed by the dial gear shaft corresponding to motor A reaching the dial gear shaft corresponding to motor B via the rear ring transmission gear. ,like Figure 6 As shown; the clockwise small-cycle open-loop transmission error formed by the dial gear shaft corresponding to motor A, passing through five dial gears to the front ring transmission gear, then from the front ring transmission gear to the five dial gears, and finally to the dial gear shaft corresponding to motor B. ,like Figure 7 As shown. Therefore, the counterclockwise large-cycle closed-loop transmission error for Similarly, the clockwise large-cycle closed-loop transmission error can be calculated. Finally, the closed-loop transmission error between motor A and motor B was obtained. for .

[0067] Counterclockwise small-cycle open-loop transmission error The weighted sum of counterclockwise small-cycle open-loop transmission errors and the clockwise small-cycle open-loop transmission errors. It is the weighted sum of the clockwise small-cycle open-loop transmission errors.

[0068] The final closed-loop transmission error is the combined value of the large-cycle closed-loop errors in both directions. The closed-loop transmission error between motor A and motor B. for .

[0069] As a further preferred embodiment of the present invention, the formula for calculating the closed-loop transmission error is:

[0070] Counterclockwise large-cycle closed-loop transmission error This is the weighted sum of the counterclockwise small-cycle open-loop transmission errors;

[0071] Clockwise large-cycle closed-loop transmission error This is the weighted sum of the clockwise small-cycle open-loop transmission errors;

[0072] Total closed-loop transmission error For counterclockwise large-cycle closed-loop transmission error Error of clockwise large-cycle closed-loop transmission difference.

[0073] When the structure is extended to N+M, the closed-loop transmission error can also be calculated using the closed-loop gear transmission error calculation method of the radial braiding machine involved in this invention.

[0074] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the above embodiments do not limit the present invention in any way, and all technical solutions obtained by equivalent substitution or equivalent transformation fall within the protection scope of the present invention.

Claims

1. A closed-loop gear transmission system for a radial braiding machine, comprising a braiding machine body, wherein the braiding body is configured as an annular spherical structure, and the braiding machine body includes a braiding disc, characterized in that, include: Multiple circumferentially distributed dial gears are used to drive the spindle movement. The dial gears are divided into multiple rings along the axial direction and multiple rows along the circumferential direction. The radial distance from the dial gear shaft to the center of the braiding machine is different for odd-numbered and even-numbered rows. The dial gears are fixed to the braiding disc by the dial gear shaft. Each dial gear meshes with other dial gears in the axial direction. Two drive gears are provided, including a front drive gear and a rear drive gear. The front drive gear is coaxial with the foremost dial gear, and the rear drive gear is coaxial with the rearmost dial gear. A drive motor is connected to a reducer, which is connected to the dial gear shaft via a main shaft coupling. Power is transmitted to the dial gear shaft via the reducer, and then transmitted to a ring of meshing gears in the circumferential direction via coaxial transmission gears, and finally to each dial.

2. The closed-loop gear transmission system of a radial braiding machine according to claim 1, characterized in that, The other end of the dial gear shaft passes through the braiding disc and is located close to the center. A dial is mounted on the dial gear shaft. Several dial holes are provided on the inner side of the braiding disc. The dial holes correspond to the dials. The dials are installed in the dial holes. Spindles are provided in two adjacent track grooves. The center lines of the dial holes and the spindles all point to the center of the sphere inside the braiding machine body.

3. The closed-loop gear transmission system of a radial braiding machine according to claim 2, characterized in that, It also includes a support frame and a traction device, wherein the main body of the weaving machine is mounted on the support frame and the traction device is arranged coaxially with the main body of the weaving machine; The two ends of the main body of the braiding machine are respectively perpendicularly connected to the bottom end of the front plate and the bottom end of the rear plate. The top end of the front plate and the top end of the rear plate are equipped with outer sealing plates, and a plurality of drive motors are evenly arranged in a ring on the outer sealing plates. The support frame includes a braiding disc support, a bottom support base, and a support base; two braiding disc supports are symmetrically installed on the outer ring of the braiding body, the braiding disc is made and installed on the bottom support base, and the support base is connected between the two bottom support bases.

4. The closed-loop gear transmission system of a radial braiding machine according to claim 1, characterized in that, The main body of the braiding machine also includes a braiding ring assembly, which includes a braiding ring support shaft, a braiding ring, a guide ring support shaft, and a guide ring. The braiding ring support shafts are equidistantly distributed and installed on the front plate and the rear plate. The braiding ring is connected to the braiding ring support shaft and the guide ring support shaft, and the guide ring is connected to the guide ring support shaft. The braiding ring, the guide ring, and the mandrel of the traction device are coaxial.

5. The closed-loop gear transmission system of a radial braiding machine according to claim 1, characterized in that, Both the dial gear and the transmission gear are spur gears; the spur gears are configured with a variable tooth width structure, and the end face near the center of the ball of the braiding machine body is machined so that the tooth width at the tip circle is narrower than the tooth width at the root circle.

6. An error calculation method for a closed-loop gear transmission system of a radial braiding machine according to any one of claims 1-5, characterized in that, Includes the following steps: Calculate the real-time transmission error of a single gear, including manufacturing error and assembly error; Calculate the average equivalent transmission error of a pair of meshing gears; Calculate the open-loop mean equivalent transmission error of multiple pairs of gears; The closed-loop transmission error is calculated based on the open-loop error, including the large-cycle closed-loop transmission error in both counterclockwise and clockwise directions; The final closed-loop transmission error is the combined value of the large-cycle closed-loop errors in both directions.

7. The method for calculating the closed-loop gear transmission error of a radial braiding machine according to claim 6, characterized in that, The formula for calculating the closed-loop transmission error is as follows: Counterclockwise large-cycle closed-loop transmission error This is the weighted sum of the counterclockwise small-cycle open-loop transmission errors; Clockwise large-cycle closed-loop transmission error This is the weighted sum of the clockwise small-cycle open-loop transmission errors; Total closed-loop transmission error For counterclockwise large-cycle closed-loop transmission error Error of clockwise large-cycle closed-loop transmission difference.

8. A method for calculating the closed-loop gear transmission error of a radial braiding machine according to any one of claims 7, characterized in that, The method is applicable to closed-loop gear transmission systems with an N+M structure, where N is the number of rings of the dial gear and M is the number of rings of the transmission gear.

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