Rewinding shaft assembling device and method

Abstract

The invention provides a rewinding shaft assembling device and method. The rewinding shaft assembling device comprises a machine table, and a drawing component, a riveting component, an outer pipe clamping component and a tightening component are arranged on the machine table; the drawing part is used for vertically drawing the mandrel spring to a certain length; the riveting part is used for riveting the outer pipe and the first inner connector together; the tightening component comprises a tightening sliding table assembly and a tightening servo assembly, the tightening sliding table assembly comprises a lifting driving part and a first linear guide rail, and the tightening servo assembly comprises a servo motor and a chuck fixedly connected with a lower output shaft of the servo motor; the servo motor is driven by the lifting driving piece to vertically ascend to return to the initial position or vertically descend to return to the working position along the first linear guide rail, and the chuck is used for being connected with the second inner connector in a clamped mode and driving the second inner connector to rotate by a certain number of turns relative to the outer pipe under driving of the servo motor so as to enable the mandrel spring to store torsion. According to the device, the rewinding shaft can be assembled, and stored torsion can be provided for the core shaft spring so as to pre-tighten the core shaft spring.

Description

Technical Field

[0001] The present invention belongs to the technical field of rewinding shaft assembly, and particularly relates to a rewinding shaft assembly device and an assembly method. Background Art

[0002] In an automotive sunroof with a curtain, the main function of the rewinding shaft is to roll up and unroll the curtain. When the curtain needs to be unrolled, the rewinding shaft is driven to rotate reversely by a motor so that the curtain wound around the rewinding shaft gradually unfolds and covers the sunroof glass. When the curtain needs to be rolled up, the rewinding shaft is driven to rotate forward by the motor to roll the curtain back onto the rewinding shaft.

[0003] For a vertically arranged rewinding shaft, the rewinding shaft includes an aluminum outer tube 101. A first inner bushing 102 is fixed at the lower end inside the outer tube 101. A first inner connector 103 is provided in the lower part inside the outer tube 101. A second inner bushing 104 is fixed at the upper end inside the outer tube 101. A second inner connector 105 is inserted into the second inner bushing 104. The second inner connector 105 can rotate relative to the second inner bushing 104 under the action of an external force, and the second inner connector 105 and the second inner bushing 104 do not undergo relative displacement in the vertical direction. A core shaft spring 106 and a plastic tube 108 sleeved outside the core shaft spring 106 are further provided inside the outer tube 101. The lower end of the core shaft spring 106 is fixedly connected to the first inner connector 103, and the upper end of the core shaft spring 106 is fixedly connected to the second inner connector 105. A cable pin insertion hole 107 penetrating the front and rear side walls of the outer tube 101 is provided at the top of the outer tube 101. The cable pin insertion hole 107 also penetrates the second inner bushing 104 and the second inner connector 105. Vertical clamping grooves 10101 are symmetrically arranged on the front and rear side walls at the bottom of the outer tube 101, as shown in Figure 1 and Figure 2 , wherein Figure 1 and Figure 2 the rewinding shafts in are horizontally arranged. Due to the reasons of the sunroof assembly steps, the core shaft spring inside the rewinding shaft needs to be pre - given a certain amount of stored torsion to drive the unfolded curtain to wind around the outer tube 101 of the rewinding shaft, so as to facilitate the next step of sunroof assembly. Therefore, there is an urgent need for a device for realizing the assembly of the rewinding shaft and pre - tightening the core shaft spring. Summary of the Invention

[0004] In view of the defects of the above - mentioned prior art, the present invention provides a rewinding shaft assembly device and an assembly method, which can realize the assembly of the rewinding shaft and provide stored torsion for the core shaft spring to pre - tighten the core shaft spring.

[0005] The technical solution adopted by the present invention to solve its technical problems is as follows:

[0006] A rewinding shaft assembly device, the rewinding shaft includes an outer tube, a first inner bushing, a first inner connector, a second inner bushing, a second inner connector, a core shaft spring, and a plastic tube,

[0007] The rewinding shaft assembly device includes a machine table, on which a drawing component, a riveting component, an outer tube clamping component, and a tightening component are arranged in sequence from bottom to top; the drawing component is used to support the rewinding shaft and vertically stretch the core shaft spring to a certain length; the riveting component is used to rivet the outer tube and the first inner connector together; the outer tube clamping component is used to clamp the outer tube; the tightening component includes a tightening slide assembly and a tightening servo assembly. The tightening slide assembly includes a lifting drive and a first linear guide. The tightening servo assembly includes a servo motor and a chuck fixedly connected to the lower output shaft of the servo motor. The servo motor is driven by the lifting drive to vertically rise back to the initial position or vertically descend back to the working position. The chuck is used to engage with the second inner connector and drive the second inner connector to rotate relative to the outer tube by a certain number of turns under the drive of the servo motor, so as to endow the core shaft spring with stored torsion.

[0008] Further, the lifting drive is a slide cylinder, and there are two first linear guides symmetrically arranged on the left and right sides of the slide cylinder. The cylinder body of the servo motor is fixedly connected to the piston rod of the slide cylinder through a mounting bracket. The mounting bracket is respectively slidably connected to the corresponding first linear guide through a first slider. The tightening slide assembly further includes a hydraulic buffer arranged below one of the first linear guides, and the hydraulic buffer is used to perform hydraulic buffering on the servo motor that has descended in place.

[0009] Further, the tightening servo assembly further includes a first flange mounting plate, a coupling, a torque sensor, a transmission shaft, a second flange mounting plate, and a fixed connection block; the cylinder body of the servo motor is fixed on the first flange mounting plate. The first flange mounting plate and the second flange mounting plate are fixedly connected through a first bracket. A second bracket fixedly connected to both the piston rod of the slide cylinder and the first slider is fixed on the second flange mounting plate. The first flange mounting plate, the first bracket, the second flange mounting plate, and the second bracket cooperate to form a mounting bracket; the lower output shaft passes through the first flange mounting plate and is connected to the transmission shaft through a coupling. The torque sensor is arranged on the transmission shaft and is used to detect the rotational torque of the transmission shaft. The lower part of the transmission shaft passes through the second flange mounting plate and is rotatably connected to the second flange mounting plate. The lower end of the transmission shaft is fixedly connected to the upper end of the chuck through a fixed connection block, and the lower end of the chuck is used to be inserted and engaged in the engagement hole at the upper end of the second inner connector.

[0010] Further, the tightening slide assembly further includes a mounting plate. The cylinder block of the slide cylinder and the two first linear guide rails are both fixed on the mounting plate. A plurality of left kidney-shaped adjustment holes are arranged from top to bottom on the left side of the left first linear guide rail on the mounting plate, and a plurality of right kidney-shaped adjustment holes are arranged from top to bottom on the right side of the right first linear guide rail on the mounting plate. The left kidney-shaped adjustment holes and the right kidney-shaped adjustment holes are both horizontally arranged in the left-right direction. The left and right mounting positions of the tightening component on the machine table are adjusted through the plurality of left kidney-shaped adjustment holes and the plurality of right kidney-shaped adjustment holes, so that the central axis of the chuck is aligned with the central axis of the riveting component.

[0011] Further, the pulling component includes a servo electric cylinder, a second linear guide rail, a pulling locking assembly and an outer tube positioning assembly. The cylinder block of the servo electric cylinder and the second linear guide rail are both fixed on the machine table. The outer tube positioning assembly includes a base, which is used to support the rewinding shaft and position the lower end of the outer tube. The base is fixedly connected to the output end of the servo electric cylinder, and the base is slidably connected to the second linear guide rail through a second slider. The pulling locking assembly is used to extend from the lower end opening of the outer tube into the outer tube and lock with the first inner connector, so that the first inner connector does not displace in the vertical direction. The servo electric cylinder acts and drives the outer tube to move vertically upward along the second linear guide rail through the base, and the second inner connector moves vertically upward along with the outer tube through the second inner bushing, so as to vertically stretch the core shaft spring to a certain length.

[0012] Further, the outer tube positioning assembly further includes a floating support member. The floating support member includes a support bottom plate fixed on the base. A support intermediate plate is fixed on the top surface of the support bottom plate. A support top plate for supporting the rewinding shaft is arranged above the support intermediate plate. The support intermediate plate and the support top plate are floatingly connected by a plurality of vertical springs. A mechanical locking piece for inserting into one of the slots at the bottom of the outer tube is fixed on the support top plate to realize the positioning of the outer tube. Penetration holes for the pulling locking assembly to pass through are respectively arranged at corresponding positions on the base, the support bottom plate, the support intermediate plate and the support top plate. An optical fiber anti-misalignment sensor is further fixed on the other side of the mechanical locking piece on the support top plate. The optical fiber anti-misalignment sensor is aligned with the other slot at the bottom of the outer tube and is used to detect whether the first inner bushing is installed at the lower end position inside the outer tube.

[0013] Further, the pulling component further includes a push-pull force sensor outside the outer tube. The push-pull force sensor is connected to the pulling locking assembly and is used to detect the tensile force of the core shaft spring.

[0014] Further, the riveting component includes a chuck mounting plate, a three-jaw chuck, a riveting head, a riveting head adjusting member, a riveting head anti-misalignment sensor, and a tool-changing sleeve; the chuck mounting plate is fixed to the machine table, the three-jaw chuck is fixedly connected to the chuck mounting plate, there are three riveting heads, three riveting head adjusting members, and three riveting head anti-misalignment sensors. Each riveting head anti-misalignment sensor is fixed at one of the chucking stations of the three-jaw chuck, each riveting head adjusting member is fixed on one of the riveting head anti-misalignment sensors, each riveting head is mounted on one of the riveting head adjusting members, and the mounting position of the riveting head on the corresponding riveting head adjusting member can be horizontally adjusted. The riveting head anti-misalignment sensor is used to detect the model of the corresponding riveting head to adapt to different thicknesses of the return shaft. The tool-changing sleeve is inserted and fixed at the return shaft insertion channel in the three-jaw chuck and is adapted to the outer tube size of the return shaft; the three-jaw chuck operates and simultaneously drives the three riveting heads to approach each other to rivet the outer tube and the first inner connector together.

[0015] Further, the outer tube clamping component includes a mounting seat, a clamping cylinder, and a positioning V-block. The mounting seat is fixed to the machine table, the clamping cylinder is a double-piston cylinder and is fixedly connected to the mounting seat, and there are two positioning V-blocks, and each positioning V-block is fixedly connected to one of the piston rods of the clamping cylinder; the clamping cylinder operates and drives the two positioning V-blocks to approach each other to clamp the outer tube.

[0016] An assembly method for a return shaft, which is assembled by using the above-mentioned return shaft assembly device, includes the following steps:

[0017] S1. Pass the return shaft through the outer tube clamping component and the riveting component from top to bottom in sequence and place it on the pulling component;

[0018] S2. Vertically stretch the core shaft spring to a certain length by the pulling component;

[0019] S3. Rivet the outer tube and the first inner connector together by the riveting component, and then clamp the outer tube by the outer tube clamping component;

[0020] S4. Drive the servo motor to vertically descend back to the working position along the first linear guide by the lifting driving member, and make the chuck engage with the second inner connector. Drive the chuck to rotate by the servo motor, and the chuck drives the second inner connector to rotate relative to the outer tube by a certain number of turns to endow the core shaft spring with stored torque;

[0021] S5. Control the outer tube clamping component to release the outer tube, and insert the locking pin into the pin insertion hole of the outer tube and the second inner connector to prevent the second inner connector from rotating relative to the second inner shaft sleeve under the action of the stored torque of the core shaft spring, and then remove the return shaft from the return shaft assembly device.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0023] The rewinding shaft assembly device in the present invention includes a machine table, on which a drawing component, a riveting component, an outer tube clamping component, and a tightening component are arranged in sequence from bottom to top. When using this rewinding shaft assembly device to assemble the rewinding shaft, first pass the rewinding shaft through the outer tube clamping component and the riveting component from top to bottom in sequence and place it on the drawing component; then stretch the core shaft spring vertically to a certain length through the drawing component; then rivet the outer tube and the first inner connector together through the riveting component, and then clamp the outer tube through the outer tube clamping component; then drive the servo motor to vertically descend along the first linear guide rail back to the working position through the lifting driving member, and make the chuck engage with the second inner connector. Rotate the chuck through the servo motor, and the chuck drives the second inner connector to rotate relative to the outer tube by a certain number of turns to endow the core shaft spring with stored torsion; then control the outer tube clamping component to loosen the outer tube, and insert the locking pin into the pin insertion hole of the outer tube and the second inner connector to prevent the second inner connector from rotating relative to the second inner shaft sleeve under the action of the stored torsion of the core shaft spring. Finally, take the rewinding shaft off the rewinding shaft assembly device. Therefore, using this rewinding shaft assembly device can realize the assembly of the rewinding shaft and can provide stored torsion for the core shaft spring to pre-tighten the core shaft spring. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic exploded view of the rewinding shaft;

[0025] Figure 2 is a schematic internal structure view of the rewinding shaft;

[0026] Figure 3 is Figure 2 a schematic cross-sectional structure view in the A-A direction of

[0027] Figure 4 is a schematic three-dimensional structure view of the rewinding shaft assembly device in the present invention;

[0028] Figure 5 is Figure 4 a partial enlarged structure view in another direction of

[0029] Figure 6 is Figure 4 a schematic three-dimensional structure view in another direction showing only the machine table, the drawing component, the riveting component, the outer tube clamping component, and the tightening component and omitting other components in

[0030] Figure 7 is Figure 6 a schematic three-dimensional structure view in another direction of one of the tightening components in the initial position in

[0031] Figure 8 is Figure 6Schematic perspective view of another direction of another tightening component in the [specific context] in the working position;

[0032] Figure 9 For Figure 8 Schematic perspective view of another direction of the tightening servo assembly in the [specific context] after omitting the first bracket and the second bracket;

[0033] Figure 10 For Figure 6 Exploded structure schematic diagram of the riveting component in the [specific context];

[0034] Figure 11 For Figure 6 Enlarged structure schematic diagram of the outer tube clamping component in the [specific context];

[0035] Figure 12 Schematic perspective view of the drawing component when the rewinding shaft is not placed on the drawing component;

[0036] Figure 13 For Figure 12 Partially enlarged structure schematic diagram of the drawing locking assembly in the [specific context];

[0037] Figure 14 Cross-sectional structure schematic diagram of the drawing locking assembly and the rewinding shaft in cooperation and in the initial position;

[0038] Figure 15 Cross-sectional structure schematic diagram of the drawing locking assembly and the rewinding shaft in cooperation and in the working position;

[0039] Figure 16 Structure schematic diagram of the outer tube positioning assembly;

[0040] Figure 17 Partially schematic perspective view of inserting the locking pin into the pin insertion holes of the outer tube and the second inner connector;

[0041] Figure 18 Schematic perspective view of the bottom of the rewinding shaft.

[0042] Description of the reference numerals in the drawings: 101, outer tube; 10101, card slot; 102, first inner bushing; 103, first inner connector; 10301, upper through-channel segment; 10302, lower through-channel segment; 10303, step surface; 104, second inner bushing; 105, second inner connector; 10501, clamping hole; 106, core shaft spring; 107, cable needle insertion hole; 108, plastic tube; 109, riveting point; 2, machine platform; 301, first linear guide rail; 302, servo motor; 303, chuck; 304, slide cylinder; 305, first slider; 306, hydraulic buffer; 307, first flange mounting plate; 308, coupling; 309, torque sensor; 3010, transmission shaft; 3011, second flange mounting plate; 3012, fixed connection block; 3013, first bracket; 3014, second bracket; 3015, mounting plate; 3016, left kidney-shaped adjustment hole; 3017, right kidney-shaped adjustment hole; 401, servo cylinder; 402, second linear guide rail; 403, base; 404, second slider; 405, support bottom plate; 406, support intermediate plate; 407, support top plate; 408, spring; 409, mechanical locking piece; 4010, optical fiber anti-misalignment sensor; 4011, push-pull force sensor; 4012, pull-out locking pin rod; 4013, ejector rod; 401301, first rod segment; 401302, tapered transition segment; 401303, second rod segment; 4014, pull-out locking pin cylinder; 4015, spherical lock; 501, chuck mounting plate; 502, three-jaw chuck; 503, riveting head; 504, riveting head adjuster; 505, riveting head anti-misalignment sensor; 506, changeover sleeve; 601, mounting seat; 60101, kidney-shaped hole; 602, clamping cylinder; 603, positioning V-block; 604, intake throttle valve; 605, exhaust throttle valve; 7, cable needle. Detailed implementation manners

[0043] The following further elaborates in detail the specific implementation manners of the present invention in conjunction with the drawings. These implementation manners are only for illustrating the present invention and not for limiting the present invention.

[0044] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for facilitating the description of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation on the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0045] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", and "coupled" 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 or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] In addition, in the description of the present invention, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0047] A rewinding shaft assembly device, the rewinding shaft includes an outer tube 101, a first inner bushing 102, a first inner connector 103, a second inner bushing 104, a second inner connector 105, a core shaft spring 106, and a plastic tube 108, as shown in Figures 1 - 3 ,

[0048] As Figure 4 , Figure 6 , Figure 7 , Figure 8 and Figure 9 shown, the rewinding shaft assembly device includes a machine table 2, on which a drawing component, a riveting component, an outer tube clamping component, and a tightening component are arranged in sequence from bottom to top; the drawing component is used to support the rewinding shaft and to vertically stretch the core shaft spring 106 to a certain length; the riveting component is used to rivet the outer tube 101 and the first inner connector 103 together; the outer tube clamping component is used to clamp the outer tube 101; the tightening component includes a tightening slide assembly and a tightening servo assembly, the tightening slide assembly includes a lifting driving member and a first linear guide 301, the tightening servo assembly includes a servo motor 302 and a chuck 303 fixedly connected to the lower output shaft of the servo motor 302, the servo motor 302 is driven by the lifting driving member to vertically rise back to the initial position or vertically descend back to the working position, and the chuck 303 is used to engage with the second inner connector 105 and drive the second inner connector 105 to rotate relative to the outer tube 101 by a certain number of turns under the drive of the servo motor 302, so as to impart the core shaft spring 106 with stored torsion.

[0049] When assembling the rewinding shaft using this rewinding shaft assembling device, first pass the rewinding shaft through the outer tube clamping component and the riveting component from top to bottom in sequence and place it on the drawing component; then vertically stretch the core shaft spring 106 to a certain length by the drawing component; then rivet the outer tube 101 and the first inner connector 103 together through the riveting component, and then clamp the outer tube 101 through the outer tube clamping component; then drive the servo motor 302 to vertically descend along the first linear guide 301 back to the working position by the lifting driving part, and make the chuck 303 engage with the second inner connector 105. Drive the chuck 303 to rotate by the servo motor 302, and the chuck 303 drives the second inner connector 105 to rotate relative to the outer tube 101 by a certain number of turns to endow the core shaft spring 106 with stored torsion; then control the outer tube clamping component to release the outer tube 101, and insert the locking pin 7 into the pin insertion hole 107 of the outer tube 101 and the second inner connector 105 to prevent the second inner connector 105 from rotating relative to the second inner shaft sleeve 104 under the action of the stored torsion of the core shaft spring 106. Finally, take the rewinding shaft off the rewinding shaft assembling device. Therefore, using this rewinding shaft assembling device can realize the assembly of the rewinding shaft and provide stored torsion for the core shaft spring 106 to pre-tighten the core shaft spring 106.

[0050] In one embodiment,

[0051] As Figures 6 - 8 shown, the lifting driving part is a sliding table cylinder 304, there are two first linear guides 301 which are symmetrically arranged on the left and right sides of the sliding table cylinder 304. The cylinder body of the servo motor 302 is fixedly connected to the piston rod of the sliding table cylinder 304 through a mounting frame. The mounting frame is respectively slidably connected to the corresponding first linear guide 301 through a first slider 305. The tightening sliding table assembly further includes a hydraulic buffer 306 arranged below one of the first linear guides 301. The hydraulic buffer 306 is used for hydraulic buffering of the servo motor 302 when it descends to the in-place position.

[0052] In this way, through the setting of the hydraulic buffer 306, the impact force when the piston rod of the sliding cylinder drives the servo motor 302 to descend to the target position can be reduced, and the servo motor 302 can slowly descend to the target position to improve the accuracy of the target position.

[0053] Among them, as Figures 7 - 9As shown in the figure, the tightening servo assembly further includes a first flange mounting plate 307, a coupling 308, a torque sensor 309, a transmission shaft 3010, a second flange mounting plate 3011, and a fixed connection block 3012; the cylinder block of the servo motor 302 is fixed on the first flange mounting plate 307, and the first flange mounting plate 307 and the second flange mounting plate 3011 are fixedly connected through a first bracket 3013. A second bracket 3014 fixedly connected to both the piston rod of the slide cylinder 304 and the first slider 305 is fixed on the second flange mounting plate 3011. The first flange mounting plate 307, the first bracket 3013, the second flange mounting plate 3011, and the second bracket 3014 cooperate to form a mounting frame; the lower output shaft passes through the first flange mounting plate 307 and is connected to the transmission shaft 3010 through the coupling 308. The torque sensor 309 is arranged on the transmission shaft 3010 and is used to detect the rotational torque of the transmission shaft 3010. The lower part of the transmission shaft 3010 passes through the second flange mounting plate 3011 and is rotatably connected to the second flange mounting plate 3011. The lower end of the transmission shaft 3010 is fixedly connected to the upper end of the chuck 303 through the fixed connection block 3012. The lower end of the chuck 303 is used to be inserted into and clamped in the clamping hole 10501 at the upper end of the second inner connector 105.

[0054] In this way, by controlling the action of the slide cylinder 304, the piston rod of the slide cylinder 304 is extended to drive the servo motor 302 to vertically descend along the first linear guide 301 back to the working position, so that the chuck 303 is clamped with the second inner connector 105. Then, the action of the servo motor 302 is controlled to rotate the lower output shaft of the servo motor 302, and the lower output shaft drives the transmission shaft 3010 to rotate through the coupling 308. The transmission shaft 3010 drives the chuck 303 to rotate. The number of rotation turns of the servo motor 302 is measured by an encoder. With the setting of the torque sensor 309, the rotational torque of the transmission shaft 3010 can be accurately detected, and the chuck 303 drives the second inner connector 105 to rotate relative to the outer tube 101 by a certain number of turns to store torsion for the core shaft spring 106, and the outer tube 101 is in a clamped state through the outer tube clamping component.

[0055] Among them, as Figures 6 - 8 shown, the tightening slide assembly further includes a mounting plate 3015. The cylinder block of the slide cylinder 304 and the two first linear guides 301 are both fixed on the mounting plate 3015. A plurality of left kidney-shaped adjustment holes 3016 are arranged from top to bottom on the left side of the left first linear guide 301 on the mounting plate 3015. A plurality of right kidney-shaped adjustment holes 3017 are arranged from top to bottom on the right side of the right first linear guide 301 on the mounting plate 3015. The left kidney-shaped adjustment holes 3016 and the right kidney-shaped adjustment holes 3017 are both horizontally arranged in the left-right direction.

[0056] In this way, through a plurality of left kidney-shaped adjustment holes 3016 and a plurality of right kidney-shaped adjustment holes 3017, the left and right installation positions of the tightening component on the machine table 2 can be adjusted, so that the central axis of the chuck 303 is aligned with the central axis of the riveting component.

[0057] Among them, a cylinder stroke retraction sensor is provided at the upper part of the cylinder body of the slide table cylinder 304, and a cylinder stroke extension sensor is provided at the lower part; when the piston rod of the slide table cylinder 304 retracts to the initial position, the induction light of the cylinder stroke retraction sensor is in the lit state, so as to remind the staff that the rewinding shaft can be placed. When the piston rod of the slide table cylinder 304 extends to the working position, the induction light of the cylinder stroke extension sensor is in the lit state.

[0058] In this way, through the setting of the cylinder stroke retraction sensor and the cylinder stroke extension sensor, it is convenient to monitor and feedback the position state of the piston rod in the slide table cylinder 304.

[0059] In one embodiment,

[0060] As Figure 6 and Figure 12 shown, the pulling component includes a servo electric cylinder 401, a second linear guide 402, a pulling locking component and an outer tube positioning component; the cylinder body of the servo electric cylinder 401 and the second linear guide 402 are both fixed on the machine table 2; the outer tube positioning component includes a base 403, and the base 403 is used to support the rewinding shaft and position the lower end of the outer tube 101. The base 403 is fixedly connected to the output end of the servo electric cylinder 401, and the base 403 is slidably connected to the second linear guide 402 through a second slider 404; the pulling locking component is used to extend from the lower end opening of the outer tube 101 into the outer tube 101 and lock with the first inner connector 103, so that the first inner connector 103 does not displace in the vertical direction; the servo electric cylinder 401 acts and drives the outer tube 101 to move vertically upward along the second linear guide 402 through the base 403, and the second inner connector 105 moves vertically upward with the outer tube 101 through the second inner sleeve 104 to vertically stretch the core shaft spring 106 to a certain length.

[0061] Before riveting, the mandrel spring 106 is in a contracted state, resulting in the first inner connector 103 not being in the correct height position relative to the outer tube 101. Therefore, it is necessary to pull the first inner connector 103 relative to the outer tube 101 to the correct height position and vertically stretch the mandrel spring 106 to a certain length to facilitate the subsequent riveting of the outer tube 101 and the first inner connector 103. Since the first inner connector 103 does not displace in the vertical direction under the locking action of the pulling and locking assembly, by controlling the action of the servo cylinder 401, the servo cylinder 401 drives the outer tube 101 to move vertically upward along the second linear guide 402 through the base 403, and the second inner connector 105 moves vertically upward with the outer tube 101 through the second inner bushing 104 to vertically stretch the mandrel spring 106 to a certain length.

[0062] Among them, as Figures 12 - 15 shown, the pulling and locking assembly includes a pulling and locking pin rod 4012, a push rod 4013, and a pulling and locking pin cylinder 4014. The pulling and locking pin rod 4012 is a hollow rod body with openings at both the top and bottom. A plurality of spherical lock catches 4015 are provided on the circumference of the top wall of the pulling and locking pin rod 4012. The top of the pulling and locking pin rod 4012 extends from the lower opening of the outer tube 101 into the outer tube 101 and into the through channel in the middle of the first inner connector 103. The cross-section of the through channel is in a stepped shape and is divided into an upper through channel segment 10301 and a lower through channel segment 10302. The diameter of the upper through channel segment 10301 is larger than that of the lower through channel segment 10302, so that a stepped surface 10303 is formed at the connection between the upper through channel segment 10301 and the lower through channel segment 10302. The push rod 4013 includes a first rod segment 401301, a tapered transition segment 401302, and a second rod segment 401303 with a diameter larger than that of the first rod segment 401301 from top to bottom. The push rod 4013 is inserted into the pulling and locking pin rod 4012. The lower end of the push rod 4013 is fixedly connected to the piston rod of the pulling and locking pin cylinder 4014. The cylinder block of the pulling and locking pin cylinder 4014 is fixed on the second linear guide 402. The bottom end of the pulling and locking pin rod 4012 is placed on the cylinder block of the pulling and locking pin cylinder 4014. The plurality of spherical lock catches 4015 protrude from the top wall of the pulling and locking pin rod 4012 by contacting the second rod segment 401303 and are clamped on the stepped surface 10303.

[0063] When the piston rod of the drawing lock pin cylinder 4014 is in the retracted state, the first rod section 401301 of the ejector rod 4013 contacts multiple spherical lock catches 4015, and the multiple spherical lock catches 4015 are located within the top pipe wall of the drawing lock pin rod 4012 because they are not subjected to extrusion pressure. By controlling the operation of the drawing lock pin cylinder 4014, the piston rod of the drawing lock pin cylinder 4014 extends and drives the ejector rod 4013 to move vertically upward relative to the drawing lock pin rod 4012. Furthermore, the second rod section 401303 of the ejector rod 4013 contacts the multiple spherical lock catches 4015, and the multiple spherical lock catches 4015 protrude from the top pipe wall of the drawing lock pin rod 4012 and are clamped on the step surface 10303 due to the extrusion pressure of the second rod section 401303, so as to lock the first inner connector 103.

[0064] After riveting the outer tube 101 and the first inner connector 103 together, by controlling the operation of the drawing lock pin cylinder 4014, the piston rod of the drawing lock pin cylinder 4014 retracts and drives the ejector rod 4013 to move vertically downward relative to the drawing lock pin rod 4012. Furthermore, the first rod section 401301 of the ejector rod 4013 contacts the multiple spherical lock catches 4015, and the multiple spherical lock catches 4015 retract from the step surface 10303 into the top pipe wall of the drawing lock pin rod 4012 because they are not subjected to extrusion pressure.

[0065] Among them, as Figure 5 and Figure 16 shown, the outer tube positioning assembly further includes a floating support member. The floating support member includes a support bottom plate 405 fixed on the base 403. A support intermediate plate 406 is fixed on the top surface of the support bottom plate 405. A support top plate 407 for supporting the rewinding shaft is provided above the support intermediate plate 406. The support intermediate plate 406 and the support top plate 407 are floatingly connected by a plurality of vertical springs 408. A mechanical locking piece 409 for inserting into one of the slots 10101 at the bottom of the outer tube 101 is fixed on the support top plate 407 to position the outer tube 101. Penetration holes for the drawing and locking assembly to pass through are respectively provided at corresponding positions on the base 403, the support bottom plate 405, the support intermediate plate 406, and the support top plate 407. An optical fiber anti-misalignment sensor 4010 is further fixed on the support top plate 407 on the other side of the mechanical locking piece 409. The optical fiber anti-misalignment sensor 4010 is aligned with the other slot 10101 at the bottom of the outer tube 101, as shown in Figure 18 and is used to detect whether the first inner bushing 102 is installed at the lower end position inside the outer tube 101.

[0066] After the rewinding shaft is placed on the support top plate 407 in this way, by manually rotating the rewinding shaft, the mechanical locking piece 409 is engaged into one of the card slots 10101 at the bottom of the outer tube 101, and the positioning of the outer tube 101 is realized. Through the arrangement of a plurality of springs 408, the outer tube 101 can be freely adjusted within a certain range in the vertical direction to ensure the accuracy of the riveting position of the outer tube 101.

[0067] Among them, as Figure 6 and Figure 12 shown, the pulling component further includes a push-pull force sensor 4011 outside the outer tube 101. The push-pull force sensor 4011 is connected to the pulling and locking component and is used to detect the tensile force of the core shaft spring 106. Preferably, the push-pull force sensor 4011 is connected to the pulling lock pin rod 4012 in the pulling and locking component. During the process of the servo electric cylinder 401 driving the outer tube 101 to move vertically upward, the tensile force of the core shaft spring 106 is detected by detecting the tensile force received by the pulling lock pin rod 4012. When the tensile force of the core shaft spring 106 meets the requirements, the servo electric cylinder 401 stops operating and performs subsequent riveting work.

[0068] In one embodiment, as Figure 6 and Figure 10 shown, the riveting component includes a chuck mounting plate 501, a three-jaw chuck 502, a riveting head 503, a riveting head adjusting member 504, a riveting head anti-misalignment sensor 505 and a conversion sleeve 506; the chuck mounting plate 501 is fixed on the machine table 2, the three-jaw chuck 502 is fixedly connected to the chuck mounting plate 501, there are three riveting heads 503, three riveting head adjusting members 504 and three riveting head anti-misalignment sensors 505. Each riveting head anti-misalignment sensor 505 is fixed at one of the chucking stations of the three-jaw chuck 502, each riveting head adjusting member 504 is fixed on one of the riveting head anti-misalignment sensors 505, each riveting head 503 is installed on one of the riveting head adjusting members 504, and the installation position of the riveting head 503 on the corresponding riveting head adjusting member 504 can be adjusted horizontally. The riveting head anti-misalignment sensor 505 is used to detect the model of the corresponding riveting head 503 to adapt to different thicknesses of the rewinding shaft. The conversion sleeve 506 is inserted and fixed at the rewinding shaft insertion channel in the three-jaw chuck 502 and is adapted to the size of the outer tube 101 of the rewinding shaft; the three-jaw chuck 502 acts and simultaneously drives the three riveting heads 503 to approach each other for riveting the outer tube 101 and the first inner connector 103 together.

[0069] Among them, the three riveting head anti-misalignment sensors 505 are evenly distributed on the three-jaw chuck 502 at 120°, so that the three riveting heads 503 are evenly distributed at 120°. Among them, the three-jaw chuck 502 acts under the action of air pressure and simultaneously drives the three riveting heads 503 to approach each other.

[0070] The riveting head 503 is detachably connected to the corresponding riveting head adjusting member 504, and different riveting depths are achieved by adjusting the horizontal installation position of the riveting head 503 on the corresponding riveting head adjusting member 504.

[0071] In one embodiment, as Figure 6 and Figure 11 shown, the outer tube clamping member includes a mounting seat 601, a clamping cylinder 602 and a positioning V-shaped block 603. The mounting seat 601 is fixed to the machine table 2. The clamping cylinder 602 is a double-piston cylinder and is fixedly connected to the mounting seat 601. There are two positioning V-shaped blocks 603, and each positioning V-shaped block 603 is fixedly connected to one of the piston rods of the clamping cylinder 602. The clamping cylinder 602 acts to drive the two positioning V-shaped blocks 603 to approach each other and is used to clamp the outer tube 101. An intake throttle valve 604 and an exhaust throttle valve 605 are provided on the clamping cylinder 602. By adjusting the valve openings of the intake throttle valve 604 and the exhaust throttle valve 605, the gas flow rate is controlled to ensure that the two positioning V-shaped blocks 603 on the clamping cylinder 602 can effectively clamp the outer tube 101, preventing damage to the outer tube 101 due to excessive pressure or unstable clamping due to too little pressure. Preferably, a polyurethane block is provided on the clamping surface of the positioning V-shaped block 603, which can better provide friction and reduce the risk of damage to the surface of the outer tube 101. Preferably, waist-shaped holes 60101 are provided on both the left and right sides of the mounting seat 601 and are horizontally arranged in the left-right direction. In this way, it is convenient to adjust the left-right mounting position of the outer tube clamping member on the machine table 2 through the waist-shaped holes 60101 on both sides to ensure that the central axes of the outer tube clamping member, the chuck 303 and the riveting member are all centered.

[0072] An assembly method of a rewinding shaft is carried out by using the above-mentioned rewinding shaft assembly device, and includes the following steps:

[0073] S1. The rewinding shaft is pre-passed through the two positioning V-shaped blocks 603 of the outer tube clamping member and the rewinding shaft insertion channel of the three-jaw chuck 502 in the riveting member from top to bottom, and is placed on the support top plate 407 of the pulling member. The mechanical locking piece 409 is snapped into one of the card slots 10101 at the bottom of the outer tube 101 to achieve the positioning of the outer tube 101. After the rewinding shaft is installed on the rewinding shaft assembly device, the pulling and locking assembly extending into the outer tube 101 is locked with the first inner connector 103 so that the first inner connector 103 does not displace in the vertical direction.

[0074] S2. By controlling the action of the servo electric cylinder 401, the servo electric cylinder 401 drives the outer tube 101 to move vertically upward along the second linear guide 402 through the base 403, and the second inner connector 105 moves vertically upward with the outer tube 101 through the second inner bushing 104 to vertically stretch the core shaft spring 106 to a certain length.

[0075] S3. Control the movement of the three-jaw chuck 502 to drive the three riveting heads 503 to approach each other simultaneously, rivet the outer tube 101 and the first inner connector 103 together to form three riveting points 109, and then control the movement of the clamping cylinder 602 to drive the two positioning V-shaped blocks 603 to approach each other and clamp the outer tube 101.

[0076] S4. Control the movement of the slide table cylinder 304 to extend the piston rod of the slide table cylinder 304 and drive the servo motor 302 to vertically descend along the first linear guide 301 back to the working position, so that the chuck 303 is engaged with the second inner connector 105. Then control the operation of the servo motor 302 to rotate the lower output shaft of the servo motor 302, and the lower output shaft drives the transmission shaft 3010 to rotate through the coupling 308. The transmission shaft 3010 drives the chuck 303 to rotate, and the chuck 303 drives the second inner connector 105 to rotate relative to the outer tube 101 by a certain number of turns to endow the core shaft spring 106 with stored torsion.

[0077] S5. Control the reverse movement of the clamping cylinder 602 to drive the two positioning V-shaped blocks 603 to move away from each other and release the outer tube 101, and insert the locking pin 7 into the pin insertion hole 107 of the outer tube 101 and the second inner connector 105, as shown in Figure 17 to prevent the second inner connector 105 from rotating relative to the second inner shaft sleeve 104 under the action of the stored torsion of the core shaft spring 106. Then remove the rewinding shaft from the rewinding shaft assembly device.

[0078] In the present invention, the left and right sets of rewinding shaft assembly devices share a machine table 2, as shown in Figure 4 and Figure 6 .

[0079] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and substitutions can be made, and these improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A rewinding roll assembly device, characterized in that: It includes a machine platform (2), on which a drawing component, a riveting component, an outer tube clamping component, and a tightening component are arranged in sequence from bottom to top; the drawing component is used to support the rewinding shaft and vertically stretch the core shaft spring (106) to a certain length; the riveting component is used to rivet the outer tube (101) and the first inner connector (103) together; the outer tube clamping component is used to clamp the outer tube (101); the tightening component includes a tightening slide table assembly and a tightening servo assembly. The tightening slide table assembly includes a lifting driving member and a first linear guide rail (301). The tightening servo assembly includes a servo motor (302) and a chuck (303) fixedly connected to the lower output shaft of the servo motor (302). The servo motor (302) is driven by the lifting driving member to vertically rise back to the initial position or vertically descend back to the working position. The chuck (303) is used to engage with the second inner connector (105) and drive the second inner connector (105) to rotate a certain number of turns relative to the outer tube (101) under the drive of the servo motor (302), so as to endow the core shaft spring (106) with stored torsion.

2. The rewinding shaft assembly device according to claim 1, characterized in that: The lifting driving member is a slide table cylinder (304). There are two first linear guide rails (301), which are symmetrically arranged on the left and right sides of the slide table cylinder (304). The cylinder body of the servo motor (302) is fixedly connected to the piston rod of the slide table cylinder (304) through a mounting bracket. The mounting bracket is respectively slidably connected to the corresponding first linear guide rail (301) through a first slider (305). The tightening slide table assembly further includes a hydraulic buffer (306) arranged below one of the first linear guide rails (301). The hydraulic buffer (306) is used to perform hydraulic buffering on the servo motor (302) that has descended in place.

3. The rewinding shaft assembly device according to claim 2, wherein: The tightening servo assembly further includes a first flange mounting plate (307), a coupling (308), a torque sensor (309), a transmission shaft (3010), a second flange mounting plate (3011), and a fixed connection block (3012); the cylinder body of the servo motor (302) is fixed on the first flange mounting plate (307), the first flange mounting plate (307) and the second flange mounting plate (3011) are fixedly connected through a first bracket (3013), a second bracket (3014) fixedly connected to both the piston rod of the slide cylinder (304) and the first slider (305) is fixed on the second flange mounting plate (3011), and the first flange mounting plate (307), the first bracket (3013), the second flange mounting plate (3011), and the second bracket (3014) cooperate to form a mounting frame; the lower output shaft passes through the first flange mounting plate (307) and is connected to the transmission shaft (3010) through a coupling (308), the torque sensor (309) is arranged on the transmission shaft (3010) and is used to detect the rotational torque of the transmission shaft (3010), the lower part of the transmission shaft (3010) passes through the second flange mounting plate (3011) and is rotatably connected to the second flange mounting plate (3011), the lower end of the transmission shaft (3010) is fixedly connected to the upper end of the chuck (303) through a fixed connection block (3012), and the lower end of the chuck (303) is used for inserting and clamping into the clamping hole (10501) at the upper end of the second inner connector (105).

4. A rewinding shaft assembly device according to claim 2, characterized in that: The tightening slide assembly further includes a mounting plate (3015), the cylinder body of the slide cylinder (304) and two first linear guides (301) are both fixed on the mounting plate (3015), a plurality of left kidney-shaped adjustment holes (3016) are arranged from top to bottom on the left side of the left first linear guide (301) on the mounting plate (3015), a plurality of right kidney-shaped adjustment holes (3017) are arranged from top to bottom on the right side of the right first linear guide (301) on the mounting plate (3015), the left kidney-shaped adjustment holes (3016) and the right kidney-shaped adjustment holes (3017) are both horizontally arranged in the left-right direction, and the left and right mounting positions of the tightening component on the machine table (2) are adjusted through the plurality of left kidney-shaped adjustment holes (3016) and the plurality of right kidney-shaped adjustment holes (3017) so that the central axis of the chuck (303) is aligned with the central axis of the riveting component.

5. A rewinding shaft assembly device according to claim 1, characterized in that: The drawing component includes a servo electric cylinder (401), a second linear guide rail (402), a drawing locking assembly, and an outer tube positioning assembly; the cylinder block of the servo electric cylinder (401) and the second linear guide rail (402) are both fixed on the machine table (2); the outer tube positioning assembly includes a base (403), the base (403) is used to support the rewinding shaft and position the lower end of the outer tube (101), the base (403) is fixedly connected to the output end of the servo electric cylinder (401), and the base (403) is slidably connected to the second linear guide rail (402) through a second slider (404); the drawing locking assembly is used to extend from the lower end opening of the outer tube (101) into the outer tube (101) and lock with the first inner connector (103) to prevent the first inner connector (103) from displacing in the vertical direction; the servo electric cylinder (401) operates and drives the outer tube (101) to move vertically upward along the second linear guide rail (402) through the base (403), and the second inner connector (105) moves vertically upward along with the outer tube (101) through the second inner bushing (104) to vertically stretch the core shaft spring (106) to a certain length.

6. The rewinding shaft assembly device according to claim 5, wherein: The outer tube positioning assembly further includes a floating support member, the floating support member includes a support bottom plate (405) fixed on the base (403), a support intermediate plate (406) is fixed on the top surface of the support bottom plate (405), a support top plate (407) for supporting the rewinding shaft is arranged above the support intermediate plate (406), the support intermediate plate (406) and the support top plate (407) are floatingly connected through a plurality of vertical springs (408), a mechanical locking piece (409) for inserting into one of the slots (10101) at the bottom of the outer tube (101) is fixed on the support top plate (407) to position the outer tube (101), through holes for the drawing locking assembly to pass through are respectively arranged at corresponding positions on the base (403), the support bottom plate (405), the support intermediate plate (406), and the support top plate (407), and an optical fiber anti-misalignment sensor (4010) is further fixed on the support top plate (407) on the other side of the mechanical locking piece (409), the optical fiber anti-misalignment sensor (4010) is opposite to the other slot (10101) at the bottom of the outer tube (101) and is used to detect whether the first inner bushing (102) is installed at the lower end position inside the outer tube (101).

7. The rewinding shaft assembly device according to claim 5, characterized in that: The drawing component further includes a push-pull force sensor (4011) outside the outer tube (101), the push-pull force sensor (4011) is connected to the drawing locking assembly and is used to detect the tensile force of the core shaft spring (106).

8. A rewinding shaft assembly device according to claim 1, characterized in that: The riveting component includes a chuck mounting plate (501), a three-jaw chuck (502), a riveting head (503), a riveting head adjusting part (504), a riveting head anti-misalignment sensor (505), and a changeover sleeve (506); the chuck mounting plate (501) is fixed on the machine table (2), the three-jaw chuck (502) is fixedly connected to the chuck mounting plate (501), there are three of the riveting heads (503), the riveting head adjusting parts (504), and the riveting head anti-misalignment sensors (505) respectively. Each of the riveting head anti-misalignment sensors (505) is fixed at one of the clamping stations of the three-jaw chuck (502), each of the riveting head adjusting parts (504) is fixed on one of the riveting head anti-misalignment sensors (505), each of the riveting heads (503) is mounted on one of the riveting head adjusting parts (504), and the mounting position of the riveting head (503) on the corresponding riveting head adjusting part (504) can be adjusted horizontally. The riveting head anti-misalignment sensor (505) is used to detect the model of the corresponding riveting head (503) to adapt to return shafts of different thicknesses. The changeover sleeve (506) is inserted and fixed at the return shaft insertion channel in the three-jaw chuck (502) and is adapted to the outer tube (101) of the return shaft in size; the three-jaw chuck (502) acts and simultaneously drives the three riveting heads (503) to approach each other for riveting the outer tube (101) and the first inner connector (103) together.

9. The rewinding shaft assembly device according to claim 1, characterized in that: The outer tube clamping component includes a mounting seat (601), a clamping cylinder (602), and a positioning V-block (603). The mounting seat (601) is fixed on the machine table (2). The clamping cylinder (602) is a double-piston cylinder and is fixedly connected to the mounting seat (601). There are two of the positioning V-blocks (603), and each positioning V-block (603) is fixedly connected to one of the piston rods of the clamping cylinder (602); the clamping cylinder (602) acts and drives the two positioning V-blocks (603) to approach each other for clamping the outer tube (101).

10. An assembling method of a rewinding roll, which is assembled by using the rewinding roll assembling device according to any one of claims 1-9, characterized in that, It includes the following steps: S1. Pre-pass the return shaft through the outer tube clamping component and the riveting component from top to bottom in sequence and place it on the pulling component; S2. Vertically stretch the core shaft spring (106) to a certain length through the pulling component; S3. Rivet the outer tube (101) and the first inner connector (103) together through the riveting component, and then clamp the outer tube (101) through the outer tube clamping component; S4. Drive the servo motor (302) to vertically descend along the first linear guide (301) back to the working position through the lifting driving part, and make the chuck (303) be clamped with the second inner connector (105). Drive the chuck (303) to rotate through the servo motor (302), and the chuck (303) drives the second inner connector (105) to rotate relative to the outer tube (101) for a certain number of turns to endow the core shaft spring (106) with stored torsion; S5. Control the outer tube clamping member to release the outer tube (101), and insert the locking needle (7) into the needle inserting hole (107) of the outer tube (101) and the second inner connector (105) to prevent the second inner connector (105) from rotating relative to the second inner shaft sleeve (104) under the stored torsion force of the core shaft spring (106). Then, remove the rewinding shaft from the rewinding shaft assembly device.

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