Automatic reverse coiling machine for automobile safety belt coil spring

Abstract

The invention relates to the field of spring processing, in particular to an automatic reverse coiling machine for a coil spring of an automobile safety belt, which is characterized in that through a pre-tightening disc with a conical cavity, the reverse coiling spring can be quickly bounced into a coil spring loading disc by utilizing the elastic tension of the reverse coiling spring during unloading; the coil spring loading device is matched with the bending block to achieve rapid bending of the end of a reverse-winding spring, a clamping strip in the coil spring loading disc can be conveniently inserted into the outer bend during unloading, rapid fixing and limiting of the outer end of the reverse-winding spring are achieved, the coil spring loading quality is improved, traditional manual disc loading is replaced, tedious disc loading operation is simplified, and the working efficiency is improved. The integration level of the equipment is improved; the operation safety is improved; besides, an electric control pedal is used as a control system of a trigger device, so that the device automatically executes reverse winding operation, bending operation and automatic tray loading operation, the automation level of the device is improved, and the production efficiency of the safety belt coil spring is improved.

Description

Technical Field

[0001] The invention relates to a spring production device, in particular to an automatic rewinding machine for automobile safety belt springs applied in the field of spring processing. Background Art

[0002] The car seat belt provides elastic force through the flat spiral spring arranged in the retractor. During the production process of the seat belt spring, a reverse winding machine is required to reversely wind the spring that has been wound once, thereby improving the uniformity of the stress distribution inside the spring and the mechanical strength of the spring. The existing reverse winding machine used in the production of seat belt springs can only reversely wind the spring, and it needs to be manually loaded after winding. During the loading process, due to the elastic tension of the spring itself, the spring is prone to expansion and dispersion, posing a threat to the safety of the operator. This not only makes the operation of the seat belt spring cumbersome but also poses a safety hazard.

[0003] The existing patent with publication number CN222001721U discloses an automatic rewinding machine, which belongs to the field of spring winding technology. It includes an automatic rewinding machine body, a belt rack is provided on the left side of the automatic rewinding machine body, support blocks are fixed to the bottom of the left and right sides of the automatic rewinding machine body, and a fixing rod is fixed to the front of the support block. The outer surface of the fixing rod is provided with a connecting plate, and the outer surface of the connecting plate is fixed with a sleeve rod. The left and right ends of the bottom of the front of the automatic rewinding machine body are provided with a lifting mechanism for improving the efficiency of the reversal spring. The automatic rewinding machine can transfer the unreversed rewinding spring through the belt rack, making it easier for staff to take the rewinding spring. Then, through the two lifting mechanisms, two rewinding springs can be reversed at the same time, greatly improving the efficiency of the rewinding spring reversal. A limiter is provided on the back of the reel to ensure stable rotation of the reel and improve practicality.

[0004] The above-mentioned prior art discloses a technical solution for simultaneously coiling two springs, but does not solve the problem that during the production process of the safety belt coil spring, the coiled spring needs to be removed and manually loaded onto a reel, resulting in cumbersome operation and poor safety. Summary of the Invention

[0005] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is that the existing rewinding machine needs to be manually rewound after the spring is rewound, and the safety is poor.

[0006] In order to solve the above problems, the present invention provides an automatic reverse winding machine for a car seat belt spring, comprising an operating table; a mounting plate is fixedly connected to the operating table, the mounting plate is fixedly connected to the pre-tightening disk, a core shaft passes through the center position of the pre-tightening disk, and an end of the core shaft away from the pre-tightening disk is connected to a first compound driving mechanism, the first compound driving mechanism drives the core shaft to perform circular motion or axial telescopic motion; a guide block is provided on one side of the pre-tightening disk, the guide block is connected to a second compound driving mechanism, and the second compound driving mechanism drives the guide block to perform circular motion or axial telescopic motion; a bending block is provided above the guide block, the bending block is connected to a third compound driving mechanism that drives it to perform vertical lifting and circular motion, the bending block and the guide block cooperate to bend the outer end of the coil spring body to form an external elbow; a hanging rod is fixedly connected to the side of the mounting plate away from the core shaft, the hanging rod is used to mount the primary coil spring to be reversely wound; the first compound driving mechanism, the second compound driving mechanism, and the third compound driving mechanism are all electrically connected to the same controller, and the controller is connected to an electric control foot pedal fixed to the lower part of the operating table;

[0007] The preload disk has a disc-shaped structure, and a conical cavity is provided on the front end surface of the preload disk. The conical cavity is an open cavity that is narrow inside and wide outside. When the core shaft is separated from the rewound spring, the rewound spring expands and unfolds under the action of its own tension, and slides into the coil spring loading disk under the guidance of the conical inner wall of the conical cavity; the guide block includes a cylindrical portion, the cylindrical portion is fixedly connected to the arc portion, and the cylindrical portion and the front end of the arc portion are fixedly connected to a protrusion, the protrusion is used to clamp the outer elbow of the rewound spring, and a clamping strip is provided in the coil spring loading disk to cooperate with the protrusion.

[0008] In the above-mentioned automatic rewinding machine for automobile seat belt springs, the present invention facilitates safe and rapid rewinding of the rewinding springs by means of a preload disk with a conical cavity and a retractable core shaft.

[0009] As a further improvement of the present application, an extrusion mechanism is installed on the pre-tightening disk, and the extrusion mechanism includes an extrusion roller arranged parallel to the core shaft, the extrusion roller is fixedly connected to a radial slider, the radial slider is slidably connected to a movable frame, an extrusion spring abutting the radial slider is provided in the movable frame, the movable end of the third cylinder is fixedly connected to the outside of the movable frame, and the third cylinder is fixedly connected to the mounting plate; an injection channel is opened in the extrusion roller, and the injection channel is connected to the external lubricating grease feeding mechanism through a feed pipe.

[0010] As a further improvement of the present application, the raised portion includes a fan-shaped raised portion arranged on the front side of the cylindrical portion and an arc-shaped raised portion integrally formed with the fan-shaped raised portion and fixed on the arc-shaped portion, and the longitudinal width of the raised portion is smaller than the width of the coil spring body; a slot is provided at the front end of the core shaft, the slot is a rectangular slot and its front end extends to the front end surface of the core shaft, and a notch is provided on the side of the pre-tightening disk facing the guide block, and the guide block partially extends into the notch.

[0011] As a further improvement of the present application, the first compound drive mechanism and the second compound drive mechanism have the same structure. The first compound drive mechanism includes a prismatic shaft fixedly connected to the rear end of the core shaft, the end of the prismatic shaft away from the core shaft is rotatably connected to the movable end of the first cylinder, the fixed end of the first cylinder is fixedly connected to the fixing frame, the fixing frame is fixedly connected to the mounting plate, and the first cylinder drives the core shaft to move linearly through the prismatic shaft; the prismatic shaft is slidably sleeved with a prismatic cylinder, the prismatic cylinder is rotatably connected to the fixing frame, the prismatic cylinder is connected to the output shaft of the first motor through a transmission gear group, the first motor is fixedly connected to the fixing frame, the first motor drives the prismatic cylinder to rotate through the transmission gear group, the prismatic cylinder drives the prismatic shaft to rotate, and the prismatic shaft drives the core shaft to rotate.

[0012] As a further improvement of the present application, the guide block is connected to the second compound drive mechanism through a telescopic shaft. The telescopic shaft includes a fixed cylinder passing through the mounting plate. The front end of the fixed cylinder is slidably connected to a sliding rod. The front end of the sliding rod extends into the guide block and is fixedly connected to the guide block by bolts. A limit spring is provided in the fixed cylinder to abut against the sliding rod.

[0013] As a further improvement of the present application, the third composite drive mechanism includes a lifting block rotatably connected to the bending block, the end of the lifting block away from the bending block is fixedly connected to the output shaft of the second motor fixedly connected to the bending block, the lifting block is slidably connected to a guide frame fixedly connected to the mounting plate, and the upper end of the guide frame is fixedly connected to a second cylinder whose movable end is fixedly connected to the lifting block.

[0014] As a further improvement of the present application, the controller is equipped with a control system, which includes a control module. The input end of the control module is connected to a starting module and a parameter setting module. The input end of the starting module is connected to an electric control foot pedal. The parameter setting module is used to input the specification parameters, rewinding parameters and bending parameters of the spring body; the output end of the control module is respectively connected to a rewinding module, a unloading module and a bending module. The output end of the rewinding module is connected to the first compound drive mechanism, the output end of the unloading module is respectively connected to the first compound drive mechanism and the second compound drive mechanism, and the bending module is connected to the third compound drive mechanism.

[0015] As a further improvement of this application, when used, the following steps are included:

[0016] Step 1: Set up the equipment and load the parameters; set the parameters through the controller, then hang the once-wound spring to be rewound on the hanging rod, and insert the outer end of the once-wound spring into the core shaft;

[0017] Step 2: Rewinding operation: the operator steps on the electric control pedal, the controller starts the first compound drive mechanism, and the core shaft reversely winds the coil spring body in a quantitative manner to obtain a rewinding spring;

[0018] Step three, bending operation; after the rewinding operation is completed, the controller starts the third composite drive mechanism, and the bending block cooperates with the guide block to bend the outer end of the rewinding spring to obtain a bending head. After the bending is completed, the bending block returns to the initial position;

[0019] Step 4: Manual loading; after bending is completed, the controller starts the second compound drive mechanism, which drives the guide block to rotate to the outside of the preload disk and extends the guide block outward, and the guide block drives the bending head to extend outward; the operator holds the coil spring loading disk by hand so that it is placed on the outside of the preload disk and aligns the clamping strip with the inside of the bending head, and then presses the coil spring loading disk so that the clamping strip is inserted into the inner cavity of the bending head;

[0020] Step 5: Automatic loading; the operator's foot disengages the electric pedal, and the controller starts the first compound drive mechanism, so that the core shaft disengages the rewinding spring, and the rewinding spring bounces into the coil spring loading tray under the action of its own tension. The automatic loading is completed, and the operator removes the coil spring loading tray.

[0021] As a further improvement of the present application, a pair of rotating wheels are provided on both sides of the opening end of the injection channel, and the rotating wheels roll against the outer wall of the coil spring body. The opening of the injection channel is located in the annular cavity formed between the pair of rotating wheels.

[0022] To sum up, the present invention provides a pre-tightening disk with a conical cavity, so that the rewinding spring can quickly bounce into the coil spring loading disk by utilizing its own elastic tension during unloading. At the same time, the guide block with a protrusion cooperates with the bending block to realize the rapid bending of the end of the rewinding spring, and facilitates the insertion of the card strip in the coil spring loading disk into the outer elbow during unloading, so as to realize the rapid fixed limit of the outer end of the rewinding spring, improve the loading quality of the coil spring, replace the traditional manual loading, simplify the tedious loading operation, improve the integration of the equipment and improve the safety of operation; in addition, through the control system with an electric foot pedal as the trigger device, the device automatically performs the rewinding operation, the bending operation and the automatic loading operation, thereby improving the automation level of the device and thereby improving the production efficiency of the seat belt coil spring; and the manual loading operation and the automatic turntable operation are switched by releasing the electric foot pedal, thereby further improving the safety of operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic diagram of the three-dimensional structure of this application;

[0024] Figure 2 This is a schematic diagram of the longitudinal cross-sectional structure of the present application at the position of the preload disc;

[0025] Figure 3 for Figure 2 Schematic diagram of the enlarged structure at A in the middle;

[0026] Figure 4This is a schematic diagram of the longitudinal cross-sectional structure of the present application at the guide block position;

[0027] Figure 5 for Figure 4 Schematic diagram of the enlarged structure at B in the middle;

[0028] Figure 6 This is a schematic diagram of the structure of the driving structure of the core shaft and the guide block in this application;

[0029] Figure 7 This is a schematic diagram of the three-dimensional structure of the preload disc in this application;

[0030] Figure 8 Schematic diagram of the three-dimensional structure of the guide block in this application;

[0031] Figure 9 This is a schematic diagram of the top view of the coil spring loading disk in this application;

[0032] Figure 10 This is a schematic diagram of the exploded structure of the bending component in this application;

[0033] Figure 11 This is a schematic diagram of the module structure of the control system in this application;

[0034] Figure 12 Schematic diagram of the bent end of the rewind spring in this application;

[0035] Figure 13 This is a schematic diagram of the guide block approaching the preload disc in this application;

[0036] Figure 14 Schematic diagram of the assembly structure of the squeezing roller in this application;

[0037] Figure 15 This is a schematic diagram of the cross-sectional structure of the extrusion roller in this application.

[0038] Description of the numbers in the figure:

[0039] 1. Operating table; 2. Mounting plate; 3. Preload disk; 301. Conical cavity; 302. Notch; 303. Sliding groove; 4. Mandrel; 401. Slot; 5. Guide block; 501. Cylindrical portion; 502. Arc portion; 503. Raised portion; 5031. Fan-shaped raised portion; 5032. Arc-shaped raised portion; 6. Bending block; 7. Hanging rod; 8. Electric pedal; 9. Controller; 10. Coil spring body; 11. Fixing frame; 12. First composite drive mechanism; 13. Second composite drive mechanism; 14. Third composite drive mechanism Compound drive mechanism; 15, telescopic shaft; 1501, fixed cylinder; 1502, sliding rod; 1503, limit spring; 16, prismatic shaft; 17, first cylinder; 18, prismatic cylinder; 19, transmission gear set; 20, first motor; 21, lifting block; 22, guide frame; 23, second motor; 24, second cylinder; 25, extrusion roller; 2501, injection channel; 2502, rotating wheel; 26, feed pipe; 27, radial slider; 28, extrusion spring; 29, movable frame; 30, third cylinder. DETAILED DESCRIPTION

[0040] The following describes two implementation methods of the present application in detail with reference to the accompanying drawings.

[0041] The first implementation method:

[0042] Figure 1-13 The present invention shows an automatic rewinding machine for a car seat belt spring, comprising an operating table 1; a mounting plate 2 is fixedly connected to the operating table 1, a preload disc 3 is fixedly connected to the mounting plate 2, a core shaft 4 passes through the center of the preload disc 3, and a first composite drive mechanism 12 is connected to the end of the core shaft 4 away from the preload disc 3, which drives the core shaft 4 to perform circular motion or axial telescopic motion; a guide block 5 is provided on one side of the preload disc 3, and the guide block 5 is connected to a second composite drive mechanism 13, which drives the guide block 5 to perform circular motion or axial telescopic motion; the guide block 5 is provided above a bending block 6, which is connected to a third composite drive mechanism 14 that drives it to perform vertical lifting and circular motions. The bending block 6 cooperates with the guide block 5 to bend the outer end of the coil spring body 10 to form an outer elbow. A hanging rod 7 is fixedly connected to the side of the mounting plate 2 away from the core shaft 4. The hanging rod 7 is used to mount the primary coil spring to be reversely wound. The first composite drive mechanism 12, the second composite drive mechanism 13, and the third composite drive mechanism 14 are all electrically connected to the same controller 9, which is connected to an electric control foot pedal 8 fixed to the bottom of the operating table 1.

[0043] See also Figure 1 、 Figure 7 and Figure 8The preload disk 3 has a disc-shaped structure, and a conical cavity 301 is provided on the front end surface of the preload disk 3. The conical cavity 301 is an open cavity that is narrow inside and wide outside. When the core shaft 4 is separated from the rewound spring, the rewound spring expands and unfolds under the action of its own tension, and slides into the coil spring loading disk under the guidance of the conical inner wall of the conical cavity 301; the guide block 5 includes a cylindrical portion 501, and the cylindrical portion 501 is fixedly connected to the arc portion 502. The front ends of the cylindrical portion 501 and the arc portion 502 are fixedly connected to a protrusion 503. The protrusion 503 is used to clamp the outer elbow of the rewound spring, and a clamping strip that cooperates with the protrusion 503 is provided in the coil spring loading disk.

[0044] Specifically, when unloading the rewind spring, the coil spring loading disk is placed outside the preload disk 3 and the clamping strip of the coil spring loading disk is inserted into the outer elbow of the rewind spring. Then, the first composite driving mechanism 12 is started to separate the core shaft 4 from the rewind spring. The rewind spring expands and unfolds under the action of its own elastic tension, and then, guided by the conical inner wall of the conical cavity 301, it rebounds into the coil spring loading disk, thereby realizing rapid unloading and loading of the rewind spring.

[0045] It should be noted that the coil spring body 10 has two forms before and after the rewinding operation: before rewinding, it is a single-wound spring, and after rewinding, it is a rewinding spring.

[0046] Compared with the traditional spring rewinding machine, the present invention uses a pre-tightening disk 3 with a conical cavity 301, so that the rewinding spring can quickly bounce into the spring loading disk by using its own elastic tension during unloading. At the same time, the guide block 5 with a protrusion 503 cooperates with the bending block 6 to realize the rapid bending of the end of the rewinding spring, and facilitates the insertion of the card strip in the spring loading disk into the outer elbow during unloading, so as to realize the rapid fixed limit of the outer end of the rewinding spring, improve the loading quality of the spring, replace the traditional manual loading, simplify the tedious loading operation, improve the integration of the equipment and improve the safety of operation.

[0047] See also Figure 1 、 Figure 8 、 Figure 9 and Figure 13 The raised portion 503 includes a fan-shaped raised portion 5031 arranged on the front side of the cylindrical portion 501 and an arc-shaped raised portion 5032 integrally formed with the fan-shaped raised portion 5031 and fixed on the arc-shaped portion 502. The longitudinal width of the raised portion 503 is smaller than the width of the coil spring body 10.

[0048] Specifically, after the outer end of the rewind spring is bent to form an outer bend, the outer bend is sleeved on the protrusion 503, and the longitudinal width of the protrusion 503 is smaller than the width of the coil spring body 10. The outer bend forms a suspended cavity on the front side of the protrusion 503 for inserting the clamping strip of the coil spring loading disk, which facilitates the insertion of the clamping strip and then clamps and fixes the outer bend of the rewind spring.

[0049] See also Figure 6 and Figure 7 A slot 401 is provided at the front end of the core shaft 4. The slot 401 is a rectangular slot and its front end extends to the front end surface of the core shaft 4. A notch 302 is provided on the side of the preload disk 3 facing the guide block 5. The guide block 5 partially extends into the notch 302.

[0050] Specifically, before rewinding, the outer end of the once-wound spring is inserted into the slot 401 to fix the outer end of the once-wound spring. At the same time, when unloading, it is convenient for the core shaft 4 to separate from the inner end of the rewinding spring (the outer end of the once-wound spring); by setting the notch 302, the guide block 5 can be better close to the pre-tightening disk 3, which is convenient for subsequent loading operations.

[0051] See also Figure 2 、 Figure 3 and Figure 6 The first compound drive mechanism 12 and the second compound drive mechanism 13 have the same structure. The first compound drive mechanism 12 includes a prismatic shaft 16 fixedly connected to the rear end of the core shaft 4, and the end of the prismatic shaft 16 away from the core shaft 4 is rotatably connected to the movable end of the first cylinder 17. The fixed end of the first cylinder 17 is fixedly connected to the fixing frame 11, and the fixing frame 11 is fixedly connected to the mounting plate 2. The first cylinder 17 drives the core shaft 4 to move linearly through the prismatic shaft 16; the prismatic shaft 16 is slidably sleeved with a prismatic cylinder 18, and the prismatic cylinder 18 is rotatably connected to the fixing frame 11. The prismatic cylinder 18 is connected to the output shaft of the first motor 20 through a transmission gear set 19. The first motor 20 is fixedly connected to the fixing frame 11. The first motor 20 drives the prismatic cylinder 18 to rotate through the transmission gear set 19, and the prismatic cylinder 18 drives the prismatic shaft 16 to rotate, and the prismatic shaft 16 drives the core shaft 4 to rotate.

[0052] Specifically, the linear movement of the core shaft 4 is achieved by the first cylinder 17, and the core shaft 4 is separated from the rewind spring during unloading; the rotation of the core shaft 4 is achieved by the cooperation of the prismatic shaft 16 and the prismatic tube 18, so that the core shaft 4 winds the spring body 10. At the same time, the prismatic tube 18 and the prismatic shaft 16 are slidably cooperated, so that the linear movement and circular movement of the prismatic shaft 16 do not interfere with each other.

[0053] See also Figure 4 、 Figure 5 and Figure 6 The guide block 5 is connected to the second compound drive mechanism 13 through the telescopic shaft 15. The telescopic shaft 15 includes a fixed cylinder 1501 that passes through the mounting plate 2. The front end of the fixed cylinder 1501 is slidably connected to a sliding rod 1502. The front end of the sliding rod 1502 extends into the guide block 5 and is fixedly connected to the guide block 5 by bolts. A limit spring 1503 is provided in the fixed cylinder 1501 to abut against the sliding rod 1502.

[0054] Specifically, after the outer elbow of the reverse-wound spring is bent and formed, first, the second composite mechanism 13 drives the guide block 5 to move forward, so that the front end surface of the cylindrical portion 501 is flush with the front end surface of the preload disk 3. At this time, the outer elbow of the reverse-wound spring protrudes from the front side of the reverse-wound spring spiral as a whole; second, the second composite driving mechanism 13 drives the guide block 5 to rotate to the outer edge of the preload disk 3; third, the coil spring loading disk is manually placed on the preload disk 3 and the protrusion 503, and the clamping strip is abutted against the protrusion 503; fourth, the coil spring loading disk is manually squeezed, and the guide block 5 is pressed. After being squeezed, the sliding rod 1502 squeezes the limit spring 1503 until the front end surface of the cylindrical portion 501 of the guide block 5 is flush with the ground of the conical cavity 301 of the preload disk 3 again. At this time, the coil spring loading disk is completely sleeved on the outside of the preload disk 3. At the same time, the outer elbow of the rewinding spring is sleeved outside the clamping strip and the outer elbow is flush with the spiral portion of the rewinding spring again; by providing a telescopic shaft 15, when the coil spring loading disk is loaded, the telescopic shaft 15 is used to remind the operator of the sleeve state of the coil spring loading disk, thereby further improving the accuracy and safety of loading.

[0055] See also Figure 10 The third composite driving mechanism includes a lifting block 21 rotatably connected to the bending block 6, and the end of the lifting block 21 away from the bending block 6 is fixedly connected to a second motor 23 whose output shaft is fixedly connected to the bending block 6. The lifting block 21 is slidably connected to a guide frame 22 fixedly connected to the mounting plate 2, and the upper end of the guide frame 22 is fixedly connected to a second cylinder 24 whose movable end is fixedly connected to the lifting block 21.

[0056] Specifically, when performing the bending operation, the second cylinder 24 drives the lifting block 21 to move downward, so that the bending block 6 moves to the relative position of the guide block 5, and then starts the second motor 23. The second motor 23 drives the bending block 6 to rotate, and the bending block 6 and the guide block 5 cooperate to bend the end of the coil spring body 10 to obtain a bending head.

[0057] See also Figure 1 and Figure 11 The controller 9 is equipped with a control system, which includes a control module. The input end of the control module is connected to a starting module and a parameter setting module. The input end of the starting module is connected to the electric control foot 8. The parameter setting module is used to input the specification parameters, rewinding parameters and bending parameters of the coil spring body 10; the output end of the control module is respectively connected to the rewinding module, the unloading module and the bending module. The output end of the rewinding module is connected to the first compound drive mechanism 12, the output end of the unloading module is respectively connected to the first compound drive mechanism 12 and the second compound drive mechanism 13, and the bending module is connected to the third compound drive mechanism 14.

[0058] See also Figure 1 、 Figure 11 、 Figure 12 and Figure 13 When using this application, the following steps are included:

[0059] Step 1: Set up the equipment and load the parameters; set the parameters through the controller 9, then hang the once-wound spring to be rewound on the hanging rod 7, and insert the outer end of the once-wound spring into the core shaft 4;

[0060] Step 2: Rewinding operation; the operator steps on the electric pedal 8, the controller 9 starts the first composite drive mechanism 12, and the core shaft 4 reversely winds the coil spring body 10 in a quantitative manner to obtain a rewinding spring;

[0061] Step three, bending operation; after the rewinding operation is completed, the controller 9 starts the third composite drive mechanism 14, the bending block 6 cooperates with the guide block 5 to bend the outer end of the rewinding spring to obtain a bending head. After the bending is completed, the bending block 6 returns to the initial position;

[0062] Step 4: Manual loading; After the bending is completed, the controller 9 starts the second compound driving mechanism 13, which drives the guide block 5 to rotate to the outside of the preload disk 3 and causes the guide block 5 to extend outward, and the guide block 5 drives the bending head to extend outward; the operator holds the coil spring loading disk by hand so that it is placed on the outside of the preload disk 3 and aligns the clamping strip with the inside of the bending head, and then presses the coil spring loading disk so that the clamping strip is inserted into the inner cavity of the bending head;

[0063] Step five, automatic loading; the operator's foot disengages the electric pedal 8, and the controller 9 starts the first compound drive mechanism 12, so that the core shaft 4 disengages the rewinding spring, and the rewinding spring bounces into the coil spring loading disk under the action of its own tension. The automatic loading is completed, and the operator removes the coil spring loading disk.

[0064] Compared with the traditional reverse winding machine, the present invention uses the electric foot pedal 8 as the control system of the trigger device, so that the device automatically performs the rewinding operation, bending operation, and automatic reeling operation, thereby improving the automation level of the device and further improving the production efficiency of the safety belt spring; and switching between manual reeling operation and automatic reeling operation is performed by releasing the electric foot pedal 8, further improving the safety of operation.

[0065] Second implementation method:

[0066] Figure 3 、 Figure 14 and Figure 15The present invention shows an automatic rewinding machine for a car seat belt spring. Based on the first embodiment, an extrusion mechanism is installed on the preload disk 3. The extrusion mechanism includes an extrusion roller 25 arranged parallel to the core shaft 4. The extrusion roller 25 is fixedly connected to a radial slider 27. The radial slider 27 is slidably connected to a movable frame 29. An extrusion spring 28 abutting the radial slider 27 is provided in the movable frame 29. The movable frame 29 is fixedly connected to the outer side of the movable frame 29 to the movable end of a third cylinder 30. The third cylinder 30 is fixedly connected to the mounting plate 2. An injection channel 2501 is opened in the extrusion roller 25. The injection channel 2501 is connected to an external lubricating grease feeding mechanism through a feed pipe 26.

[0067] Specifically, during the rewinding operation, the external lubricating grease feeding mechanism is turned on to evenly apply the lubricating grease to the outer wall of the coil spring body 10, and the spiral winding of the coil spring body 10 itself is used to squeeze and spread the applied lubricating grease to achieve even spreading of the lubricating grease; instead of the traditional method of manually spraying the lubricating grease on the side wall end face of the rewinding spring, the lubrication effect and the service life of the rewinding spring are improved, the integration of the rewinding machine is further improved, the production efficiency of the seat belt spring is improved, and the production process is further simplified.

[0068] See also Figure 3 and Figure 15 The squeezing roller 25 is located at both sides of the opening end of the injection channel 2501 and is provided with a pair of running wheels 2502 . The running wheels 2502 roll and abut against the outer wall of the coil spring body 10 . The opening of the injection channel 2501 is located in the annular cavity enclosed by the pair of running wheels 2502 .

[0069] Specifically, by providing a rotating wheel 2502, the extrusion roller 25 rolls against the outer wall of the coil spring body 10 through the rotating wheel 2502, thereby reducing friction damage to the coil spring body 10. At the same time, the lubricating grease sprayed from the injection channel 2501 enters the annular cavity formed between the pair of rotating wheels 2502, further improving the uniformity of spreading the lubricating grease on the coil spring body 10.

[0070] See also Figure 3 The preload disc 3 is provided with a sliding groove 303 for the movable frame 29 to slide longitudinally, and the sliding groove 303 extends into the mounting plate 2.

[0071] Specifically, the third cylinder 30 drives the movable frame 29 and the squeezing roller 25 thereon to move longitudinally linearly, so that the squeezing roller 25 is separated from the rewinding spring during automatic loading, thereby avoiding obstruction to the ejection of the rewinding spring.

[0072] In view of current actual needs, the protection scope of the above-mentioned implementation mode adopted in this application is not limited to this. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the protection scope of the present invention.

Claims

1. An automatic rewinding machine for automobile seat belt springs, characterized in that: The invention comprises an operating table (1); a mounting plate (2) is fixedly connected to the operating table (1); a preload disc (3) is fixedly connected to the mounting plate (2); a core shaft (4) is passed through the center of the preload disc (3); an end of the core shaft (4) away from the preload disc (3) is connected to a first composite drive mechanism (12); the first composite drive mechanism (12) drives the core shaft (4) to perform circular motion or axial telescopic motion; a guide block (5) is provided on one side of the preload disc (3); the guide block (5) is connected to a second composite drive mechanism (13); the second composite drive mechanism (13) drives the guide block (5) to perform circular motion or axial telescopic motion; a guide block (5) is provided above the guide block (5). A bending block (6) is connected to a third composite drive mechanism (14) for driving the bending block (6) to perform vertical lifting and circular motions. The bending block (6) cooperates with the guide block (5) to bend the outer end of the coil spring body (10) to form an outer elbow. A hanging rod (7) is fixedly connected to the side of the mounting plate (2) away from the core shaft (4). The hanging rod (7) is used to mount a primary coil spring to be reversely coiled. The first composite drive mechanism (12), the second composite drive mechanism (13), and the third composite drive mechanism (14) are all electrically connected to the same controller (9). The controller (9) is connected to an electric control foot pedal (8) fixed to the lower part of the operating table (1). The preload disk (3) is a disk-shaped structure. A conical cavity (301) is provided on the front end surface of the preload disk (3). The conical cavity (301) is an open cavity with a narrow inside and a wide outside. When the core shaft (4) is separated from the rewound spring, the rewound spring expands and unfolds under the action of its own tension, and slides into the coil spring loading disk under the guidance of the conical inner wall of the conical cavity (301). The guide block (5) includes a cylindrical portion (501). The cylindrical portion (501) is fixedly connected to an arc portion (502). The front ends of the cylindrical portion (501) and the arc portion (502) are fixedly connected to a protrusion (503). The protrusion (503) is used to clamp the outer elbow of the rewound spring. A clamping strip is provided in the coil spring loading disk to cooperate with the protrusion (503).

2. The automatic rewinding machine for automobile seat belt springs according to claim 1, characterized in that: The preload disc (3) is provided with an extrusion mechanism, which comprises an extrusion roller (25) arranged parallel to the core shaft (4); the extrusion roller (25) is fixedly connected to a radial slider (27); the radial slider (27) is slidably connected to a movable frame (29); an extrusion spring (28) abutting against the radial slider (27) is provided in the movable frame (29); the outer side of the movable frame (29) is fixedly connected to the movable end of a third cylinder (30); the third cylinder (30) is fixedly connected to the mounting plate (2); an injection channel (2501) is provided in the extrusion roller (25); the injection channel (2501) is communicated with an external lubricating grease feeding mechanism through a feed pipe (26).

3. The automatic rewinding machine for automobile safety belt springs according to claim 1, characterized in that: The protrusion (503) comprises a fan-shaped protrusion (5031) arranged on the front side of the cylindrical portion (501) and an arc-shaped protrusion (5032) integrally formed with the fan-shaped protrusion (5031) and fixed on the arc-shaped portion (502); the longitudinal width of the protrusion (503) is smaller than the width of the coil spring body (10); a slot (401) is provided at the front end of the core shaft (4); the slot (401) is a rectangular slot and its front end extends to the front end surface of the core shaft (4); a notch (302) is provided on the side of the preload disk (3) facing the guide block (5), and the guide block (5) partially extends into the notch (302).

4. The automatic rewinding machine for automobile safety belt springs according to claim 1, characterized in that: The first composite drive mechanism (12) and the second composite drive mechanism (13) have the same structure. The first composite drive mechanism (12) comprises a prismatic shaft (16) fixedly connected to the rear end of the core shaft (4). The end of the prismatic shaft (16) away from the core shaft (4) is rotatably connected to the movable end of the first cylinder (17). The fixed end of the first cylinder (17) is fixedly connected to the fixing frame (11). The fixing frame (11) is fixedly connected to the mounting plate (2). The first cylinder (17) drives the core shaft (4) through the prismatic shaft (16). 4) linear movement; the prismatic shaft (16) is slidably sleeved with a prismatic cylinder (18), the prismatic cylinder (18) is rotatably connected to the fixed frame (11), the prismatic cylinder (18) is connected to the output shaft of the first motor (20) through a transmission gear set (19), the first motor (20) is fixedly connected to the fixed frame (11), the first motor (20) drives the prismatic cylinder (18) to rotate through the transmission gear set (19), the prismatic cylinder (18) drives the prismatic shaft (16) to rotate, and the prismatic shaft (16) drives the core shaft (4) to rotate.

5. The automatic rewinding machine for automobile safety belt springs according to claim 4, characterized in that: The guide block (5) is connected to the second composite drive mechanism (13) via a telescopic shaft (15); the telescopic shaft (15) comprises a fixed cylinder (1501) penetrating the mounting plate (2); a sliding rod (1502) is slidably connected to the front end of the fixed cylinder (1501); the front end of the sliding rod (1502) extends into the guide block (5) and is fixedly connected to the guide block (5) by means of bolts; a limit spring (1503) is provided in the fixed cylinder (1501) and abuts against the sliding rod (1502).

6. The automatic rewinding machine for automobile safety belt springs according to claim 5, characterized in that: The third composite drive mechanism comprises a lifting block (21) rotatably connected to the bending block (6); an end of the lifting block (21) away from the bending block (6) is fixedly connected to a second motor (23) whose output shaft is fixedly connected to the bending block (6); the lifting block (21) is slidably connected to a guide frame (22) fixedly connected to the mounting plate (2); and an upper end of the guide frame (22) is fixedly connected to a second cylinder (24) whose movable end is fixedly connected to the lifting block (21).

7. The automatic rewinding machine for automobile safety belt springs according to claim 6, characterized in that: The controller (9) is equipped with a control system, which includes a control module. The input end of the control module is connected to a starting module and a parameter setting module. The input end of the starting module is connected to an electric control pedal (8). The parameter setting module is used to input specification parameters, rewinding parameters and bending parameters of the coil spring body (10); the output end of the control module is respectively connected to a rewinding module, a discharge module and a bending module. The output end of the rewinding module is connected to a first composite drive mechanism (12), the output end of the discharge module is respectively connected to the first composite drive mechanism (12) and the second composite drive mechanism (13), and the bending module is connected to a third composite drive mechanism (14).

8. The automatic rewinding machine for automobile safety belt springs according to claim 7, characterized in that: When in use, the following steps are included: Step 1: Set up the equipment and load the parameters; set the parameters through the controller (9), then hang the once-wound spring to be rewound on the hanging rod (7), and insert the outer end of the once-wound spring into the core shaft (4); Step 2: Rewinding operation; the operator steps on the electric control pedal (8), the controller (9) starts the first composite drive mechanism (12), and the core shaft (4) reversely winds the coil spring body (10) in a quantitative manner to obtain a rewinding spring; Step 3, bending operation; after the rewinding operation is completed, the controller (9) starts the third composite drive mechanism (14), and the bending block (6) cooperates with the guide block (5) to bend the outer end of the rewinding spring to obtain a bending head. After the bending is completed, the bending block (6) returns to the initial position; Step 4: Manual loading; after the bending is completed, the controller (9) starts the second composite drive mechanism (13), and the second composite drive mechanism (13) drives the guide block (5) to rotate to the outside of the preload disk (3), and causes the guide block (5) to extend outward, and the guide block (5) drives the bending head to extend outward; the operator holds the coil spring loading disk by hand so that it is placed on the outside of the preload disk (3) and aligns the clamping strip with the inside of the bending head, and then presses the coil spring loading disk so that the clamping strip is inserted into the inner cavity of the bending head; Step 5, automatic loading; the operator's foot disengages the electric control pedal (8), and the controller (9) starts the first composite drive mechanism (12), so that the core shaft (4) disengages the rewinding spring, and the rewinding spring rebounds into the coil spring loading disk under the action of its own tension. The automatic loading is completed, and the operator removes the coil spring loading disk.

9. The automatic rewinding machine for automobile safety belt springs according to claim 2, characterized in that: The squeezing roller (25) is provided with a pair of rotating wheels (2502) on both sides of the opening end of the injection channel (2501), and the rotating wheels (2502) are in rolling contact with the outer wall of the coil spring body (10). The opening of the injection channel (2501) is located in an annular cavity enclosed by the pair of rotating wheels (2502).

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