A spring feeding device

Abstract

The application discloses a spring feeding device, which comprises a pushing spring mechanism, a welding mechanism and a pulling spring mechanism arranged in sequence along a conveying direction, the pushing spring mechanism is used for pushing the spring in the cloth bag at a first preset speed, the welding mechanism is used for welding the passing cloth bag to form a bag chamber, the bag chamber and the spring loaded in the bag chamber together form a bagged spring string, and the pulling spring mechanism is used for pushing the bagged spring string at a second preset speed. By adjusting the first preset speed of the pushing spring mechanism and the second preset speed of the pulling spring mechanism to form a speed difference, the bag chamber width of the final bagged spring product can be continuously and accurately controlled without replacing any mechanical parts, so that the bagged spring string with different spring radii can be produced, which reduces the equipment investment cost and the time cost of replacing and debugging the production line.

Description

Technical Field

[0001] This application relates to the field of pocket spring manufacturing, and in particular to a spring delivery device. Background Technology

[0002] Pocket springs are widely used in the manufacture of mattresses, sofas, and other furniture because they provide independent support points. The manufacturing process of pocket springs typically involves compressing individual springs and feeding them sequentially into a continuous bag formed by welding two pieces of non-woven fabric. The springs are then separated and encapsulated in individual bags using ultrasonic welding.

[0003] In existing technologies, while existing spring feeding devices can control spring deformation, the fixed distance between the pull rods used to transport the springs means that a single spring feeding device can only be adapted to a very narrow range of spring diameters. When it is necessary to produce pocket springs of different specifications (i.e., different diameters), the entire spring feeding device or its main components must be replaced, and even the layout of the entire production line may need to be adjusted. This not only increases the equipment investment cost but also increases the time cost of frequent changes and adjustments to the production line. Utility Model Content

[0004] This application aims to solve at least one of the technical problems existing in the prior art. To this end, this application proposes a spring feeding device that can effectively prevent loosening when a nut is connected to a bolt.

[0005] According to an embodiment of this application, a spring feeding device includes: a spring pushing mechanism for pushing an unsealed spring located inside a cloth bag; a welding mechanism disposed downstream of the spring pushing mechanism; the welding mechanism is used to weld the cloth bag passing by to form a bag chamber and seal the spring inside the bag, a bag chamber and a spring sealed to the bag chamber together form a bag spring, and a plurality of bag springs form a bag spring string; and a spring tension mechanism disposed downstream of the welding mechanism for pushing the bag spring string; wherein, within the time period of completing one bag spring, the spring feeding device can change the width of the bag chamber by changing the pushing distance of the spring tension mechanism relative to the spring pushing mechanism.

[0006] According to an embodiment of this application, the spring feeding device includes a spring pushing mechanism comprising a first conveying component and a second conveying component spaced apart, with a spring pushing channel formed between the first conveying component and the second conveying component for conveying a cloth bag and a spring; the first conveying component includes a first crossbar, with multiple first crossbars spaced apart along the conveying direction of the cloth bag and the spring; the second conveying component includes a second crossbar, with multiple second crossbars spaced apart along the conveying direction of the cloth bag and the spring, and the second crossbars and the first crossbars are correspondingly arranged within the spring pushing channel; the first crossbars and the second crossbars can jointly push the spring.

[0007] According to the spring feeding device of the present application embodiment, the spring push channel gradually narrows along the conveying direction.

[0008] According to the spring feeding device of the present application embodiment, the first crossbar includes a round tube and a spindle, the round tube is rotatable relative to the spindle, and the spindle is fixedly disposed on the first conveying component; and / or the second crossbar includes a round tube and a spindle, the round tube is rotatable relative to the spindle, and the spindle is fixedly disposed on the second conveying component.

[0009] According to the spring feeding device of the present application embodiment, the two ends of the first crossbar are rotatably connected to the first conveying component, and / or the two ends of the second crossbar are rotatably connected to the second conveying component.

[0010] According to the embodiments of this application, the spring feeding device includes a third conveying component, which includes a third crossbar. A plurality of third crossbars are spaced apart along the conveying direction of the bag spring string, and the third crossbars are capable of pushing the bag spring string.

[0011] According to the embodiments of this application, the spring feeding device includes a tension spring mechanism comprising a fourth conveying component spaced apart from the third conveying component, a tension spring channel being formed between the third and fourth conveying components for conveying a bagged spring string; the fourth conveying component includes a fourth crossbar, a plurality of fourth crossbars being spaced apart along the conveying direction of the bagged spring string, and the fourth crossbars corresponding to the third crossbars in the tension spring channel; the third and fourth crossbars can jointly push the bagged spring string.

[0012] According to the embodiments of this application, the spring feeding device includes a tension spring mechanism that is spaced apart from the third conveying component. The plate is used to support or press down the bagged spring string, and the third crossbar is capable of pushing the bagged spring string.

[0013] According to the spring feeding device of the present application embodiment, at least one of a roller, a wheel or a flow strip is provided on the side of the plate that contacts the bagged spring string, so as to roll and contact the bagged spring string.

[0014] According to the embodiments of this application, the welding mechanism includes a welding knife, an ultrasonic mold head, and a driving structure. The driving structure can drive the welding knife and the ultrasonic mold head to move closer to each other and / or further apart.

[0015] According to the spring feeding device of this application embodiment, the welding mechanism includes a welding knife connector and an ultrasonic mold head connector, and the driving structure includes a motor and a turntable; the turntable is mounted on the motor, and the motor can drive the turntable to rotate; the ultrasonic mold head connector is rotatably connected to the turntable, and the ultrasonic mold head can move vertically with the movement of the ultrasonic mold head connector; the welding knife connector is rotatably connected to the turntable, and the welding knife can move vertically with the movement of the welding knife connector; the position of the ultrasonic mold head connector rotatably connected to the turntable and the position of the welding knife connector rotatably connected to the turntable are symmetrical about the motor, and the motor can drive the turntable to rotate so that the welding knife and the ultrasonic mold head move toward or away from each other.

[0016] According to the spring feeding device of the present application embodiment, the turntable includes a first disk and a second disk. Both the first disk and the second disk have mounting holes for connecting a motor formed at an eccentric position. The mounting holes of the first disk and the second disk are coaxially arranged. The second disk and the first disk are eccentrically arranged with respect to each other. The welding knife connector is rotatably connected to the first disk, and the ultrasonic mold head connector is rotatably connected to the second disk.

[0017] The spring feeding device according to the embodiments of this application has at least the following beneficial effects: within the time cycle of completing one bag spring, by adjusting the pushing distance of the spring pusher relative to the spring tensioner, this application can continuously and accurately control the bag chamber width of the final bag spring product without replacing any mechanical parts, thereby enabling the production of bag spring strings with different spring radii. This reduces both the equipment investment cost and the time cost of changing and debugging the production line.

[0018] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0019] The present application will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 This is a schematic diagram of the overall structure of the spring feeding device of this application; Figure 2 for Figure 1 A schematic diagram of another embodiment of the center spring device; Figure 3 for Figure 1 A schematic diagram of the overall structure of the welding mechanism; Figure 4 for Figure 3 A cross-sectional schematic diagram of one embodiment of the welding mechanism; Figure 5 for Figure 4 A schematic diagram of the turntable in the welding mechanism; Figure 6 for Figure 4 A schematic diagram of another embodiment of the first connecting rod, the second connecting rod, and the turntable in the welding mechanism; Figure 7 for Figure 1 A schematic diagram of another embodiment of the central spring device.

[0020] Figure label: a. Spring; b. Cloth bag; c. Bag-packaged spring string; 100. Tension spring mechanism; 110. Third transmission assembly; 111. Third crossbar; 112. Third chain; 120. Fourth pull rod assembly; 121. Fourth crossbar; 122. Fourth chain; 130. Plate; 131. Flow bar; 140. Tension spring channel; 200. Welding mechanism; 210. Welding knife; 220. Ultrasonic mold head; 230. Drive structure; 231. Motor; 232. Turntable; 2321. First disc; 2322. Second disc; 2323. Mounting hole; 233. Motor mounting plate; 240. Welding knife connector; 241. First crossbeam; 242. Second crossbeam; 243. Slide rod; 244. First connecting rod; 250. Ultrasonic mold head connector; 251. Mold head bracket; 252. Second connecting rod; 300, push spring mechanism; 310, first transmission assembly; 311, first crossbar; 312, first chain; 320, second transmission assembly; 321, second crossbar; 322, second chain; 330, push spring channel; 331, compression zone. Detailed Implementation

[0021] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0022] In the description of this application, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0023] In the description of this application, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0024] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.

[0025] In the description of this application, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0026] The following is for reference. Figures 1 to 6 Describes a spring feeding device according to an embodiment of this application.

[0027] Reference Figure 1 and Figure 2 As shown, one embodiment of this application discloses a spring feeding device, which includes a spring pushing mechanism 300, a welding mechanism 200, and a spring tension mechanism 100. The spring feeding device is used to compress spring a on a bag spring a production line and stably seal it in a cloth bag b through a welding process.

[0028] like Figure 1 and Figure 2As shown, the welding mechanism 200 is located downstream of the push spring mechanism 300, and the tension spring mechanism 100 is located downstream of the welding mechanism 200. That is, the spring feeding device includes the push spring mechanism 300, the welding mechanism 200, and the tension spring mechanism 100 in sequence along the material conveying direction. Among them, the push spring mechanism 300 is used to push the unsealed spring a located in the cloth bag b at a first preset speed; the welding mechanism 200 is used to weld the cloth bag b passing by to form a bag chamber and seal the spring a in the cloth bag b. One bag chamber and one spring a sealed to the bag chamber together form a bag spring, and several bag springs together form a bag spring string c; the tension spring mechanism 100 is used to push the bag spring string c at a second preset speed. It is understandable that when the bag b and spring a are fed into the spring-pushing mechanism 300 of the spring-feeding device, the bag b surrounds several springs a, and there is a gap between each spring a. The spring-pushing mechanism 300 pushes the springs a inside the bag b along the material conveying direction. The welding mechanism 200 welds the bag b along the way, and each bag chamber formed is equipped with only one spring a. After the welding mechanism 200 processes the bag b and spring a into a bag spring string c, the tension spring mechanism 100 pushes the bag spring string c so that the bag b and spring a located in the tension spring mechanism 100 are simultaneously conveyed along the material conveying direction.

[0029] During the operation of the spring feeding device, when the second preset speed of the tension spring mechanism 100 is equal to the first preset speed of the push spring mechanism 300, the tension spring mechanism 100 pushes the spring a and the bag b at the same speed as the push spring mechanism 300 pushes the spring a. Within the time cycle of completing one bag spring, the pushing distance of the bag spring string c pushed by the tension spring mechanism is equal to the pushing distance of the spring a pushed by the push spring mechanism 300. In this way, the spring a always remains relatively stationary with the bag b, and there will be no relative slippage between the spring a and the bag b. At this time, the width of the bag chamber formed by the welding mechanism 200 welding the bag b is the default bag chamber width.

[0030] When the second preset speed of the tension spring mechanism 100 is greater than the first preset speed of the push spring mechanism 300, the movement speed of the bag spring string c at the tension spring mechanism 100 is greater than the movement speed of the spring a at the push spring mechanism 300. Within the time cycle of completing one bag spring, the pushing distance of the bag spring string c pushed by the tension spring mechanism is greater than the pushing distance of the spring a pushed by the push spring mechanism 300. The bag spring string c of the tension spring mechanism 100 drives the cloth bag b of the push spring mechanism 300 to slide relative to the spring a at the push spring mechanism 300. The welding mechanism 200 still performs welding at the original frequency. Therefore, during the welding time interval of the welding mechanism 200, the cloth bag b passing through the welding mechanism 200 is longer. At this time, the bag chamber formed by the welding mechanism 200 welding the cloth bag b has a first bag chamber width in the conveying direction. It can be understood that the first bag chamber width is greater than the above-mentioned conventional bag chamber width.

[0031] When the second preset speed of the tension spring mechanism 100 is less than the first preset speed of the push spring mechanism 300, the movement speed of the bag spring string c at the tension spring mechanism 100 is less than the movement speed of the spring a at the push spring mechanism 300. That is, the speed at which the tension spring mechanism 100 drives the cloth bag b to move is less than the speed at which the push spring mechanism 300 pushes the spring a to move. Within the time cycle of completing one bag spring, the pushing distance of the tension spring mechanism pushing the bag spring string c is greater than the pushing distance of the push spring mechanism 300 pushing the spring a. The push spring mechanism 300 pushes the spring a to slide forward relative to the cloth bag b. The bag chamber formed by the welding mechanism 200 welding the cloth bag b has a second bag chamber width in the conveying direction. It can be understood that the second bag chamber width is less than the normal bag chamber width, and also less than the first bag chamber width.

[0032] Therefore, by adjusting the speed difference between the first preset speed and the second preset speed, this application can continuously and accurately control the bag chamber width of the final bag spring a product without replacing any mechanical parts, thereby enabling the production of bag spring strings c with different spring a radii. This reduces both equipment investment costs and the time cost of changing and debugging the production line.

[0033] In some embodiments, such as Figure 1 As shown, the push spring mechanism 300 includes a first conveying component 310 and a second conveying component 320 spaced apart, with a push spring channel 330 formed between the first conveying component 310 and the second conveying component 320 for conveying the bag b and the spring a; the first conveying component 310 includes a first crossbar 311, and multiple first crossbars 311 are spaced apart along the conveying direction of the bag b and the spring a; the second conveying component 320 includes a second crossbar 321, and multiple second crossbars 321 are spaced apart along the conveying direction of the bag b and the spring a, with the second crossbars 321 corresponding to the first crossbars 311; the first crossbars 311 and the second crossbars 321 can jointly push the spring a.

[0034] In other words, the push-spring mechanism 300 is used to push the spring a located between the upper and lower fabric bags b at a first preset speed. The push-spring mechanism 300 mainly includes a first conveying assembly 310 and a second conveying assembly 320 arranged at intervals, forming a push-spring channel 330 for conveying the spring a and the fabric bag b. The first conveying assembly 310 includes two sets of opposing first chains 312, and the two sets of chains are connected by chain plates with multiple first crossbars 311 arranged at intervals along the conveying direction, and the multiple first crossbars 311 are arranged in parallel. Similarly, the second conveying assembly 320 also includes two sets of opposing second chains 322, and the two sets of chains are connected by multiple second crossbars 321. The first crossbars 311 and the second crossbars 321 are arranged one-to-one, and together they clamp and push the spring a located therein to move towards the welding mechanism 200.

[0035] In some embodiments, such as Figure 1 As shown, a portion of the first conveying component 310 and the second conveying component 320 are spaced apart from each other so that the spring channel 330 forms a compression zone 331. The compression zone 331 gradually narrows along the conveying direction of the spring channel 330 and is used to compress and convey the spring a.

[0036] In other words, at the material inlet end of the spring pusher mechanism 300, that is, at the inlet of the spring pusher channel 330, the first conveying component 310 and the second conveying component 320 are far apart from each other, so that the inlet of the spring pusher channel 330 forms a compression zone 331 that gradually narrows along the conveying direction. This compression zone 331 is used to guide and compress the spring a fed into the spring feeding device from the previous process, so that it enters the subsequent station in a stable compressed state.

[0037] In some embodiments, such as Figure 7 As shown, adjacent first crossbars 311 are sequentially spaced by a first gap and a second gap, with the first gap and the second gap being alternately spaced. Correspondingly, adjacent second crossbars 321 are sequentially spaced by a first gap and a second gap. The first gap between two second crossbars 321 is vertically aligned with the first gap between the corresponding two first crossbars 311, and the second gap between two second crossbars 321 is also vertically aligned with the second gap between the two first crossbars 311. During transport, spring a is positioned at the first gap, and the second gap controls the distance between adjacent springs a. The first gap can be customized according to user requirements. For example, the first gap can be slightly smaller than the waist diameter of spring a, so that the two first crossbars 311 can clamp spring a during transport. The second gap can also be customized according to user requirements. For example, the second gap can be approximately equal to the distance between two springs 3. This configuration allows spring a to be clamped by both the two first crossbars 311 and the two second crossbars 321 during transport. It is understandable that the welding mechanism 200 is located at the end of the push spring mechanism 300. The welding mechanism 200 can open and close to weld the cloth bag. During the operation of the push spring mechanism 300, when a certain second gap rotates to the end of the push spring mechanism 300, the welding mechanism 200 welds the cloth bag b at that second gap, so that the spring a can be encapsulated in the cloth bag.

[0038] In some embodiments, the first crossbar 311 is rotatably connected at both ends to the first conveying assembly 310, and / or the second crossbar 321 is rotatably connected at both ends to the second conveying assembly 320. It is understood that the rotatable connection of the first crossbar 311 and the second crossbar 321 to both sides of the push spring channel 330 can make the sliding process of the bag b smoother.

[0039] Furthermore, the first crossbar 311 includes a round tube and a mandrel, the round tube being rotatable relative to the mandrel, the mandrel being fixedly mounted on the first conveying assembly 310; and / or the second crossbar 321 includes a round tube and a mandrel, the round tube being rotatable relative to the mandrel, the mandrel being fixedly mounted on the second conveying assembly 320. In other words, the first crossbar 311 and the second crossbar 321 each include a mandrel and a round tube rotatable relative to the mandrel, thus forming a rotatable structure.

[0040] Understandably, by setting the first crossbar 311 and the second crossbar 321 as rotatable structures, when the first preset speed of the push spring mechanism 300 and the second preset speed of the tension spring mechanism 100 are not equal, the bag b located inside the push spring mechanism 300 can easily slide relative to the first crossbar 311 and the second crossbar 321; when the first preset speed and the second preset speed are different, and the second preset speed of the tension spring mechanism 100 is greater than the first preset speed of the push spring mechanism 300, the bag spring string c of the tension spring mechanism 100 drives the bag b of the push spring mechanism 300 to slide relative to the spring a and the first crossbar 311 and the second crossbar 321 at the push spring mechanism 300, making the sliding process of the bag b smoother. This reduces the frictional force from the first crossbar 311 and the second crossbar 321. When the second preset speed of the tension spring mechanism 100 is less than the first preset speed of the push spring mechanism 300, the movement speed of the bag spring string c at the tension spring mechanism 100 is less than the movement speed of the spring a at the push spring mechanism 300. That is, the speed at which the tension spring mechanism 100 drives the bag b to move is less than the speed at which the push spring mechanism 300 pushes the spring a to move. The first crossbar 311 and the second crossbar 321 of the push spring mechanism 300 push the spring a to slide forward relative to the bag b. The bag b rolls in contact with the first crossbar 311 and the second crossbar 321, reducing the frictional force between the bag b and the push spring mechanism 300, thus making the process of the spring a sliding relative to the bag b smoother.

[0041] In some embodiments, such as Figure 1 As shown, the tension spring mechanism 100 includes a third conveying assembly 110, which includes third crossbars 111. Multiple third crossbars 111 are spaced apart along the conveying direction of the bag spring string c, and the third crossbars 111 can push the bag spring string c. In other words, the tension spring mechanism 100 may include a third conveying assembly 110, which includes two sets of opposing third chains 112. Multiple third crossbars 111 are connected between the two sets of chains via chain plates. The multiple third crossbars 111 are spaced apart along the conveying direction on the lower side of the bag spring string c, and conveying is achieved by pushing the bottom of the bag spring string c.

[0042] In some embodiments, such as Figure 1As shown, the tension spring mechanism 100 includes a fourth transmission component 120 spaced apart from the third transmission component 110. A tension spring channel 140 is formed between the third transmission component 110 and the fourth transmission component 120. The tension spring channel 140 is used to transport the bagged spring string c. The fourth transmission component 120 includes a fourth crossbar 121. Multiple fourth crossbars 121 are spaced apart along the conveying direction of the bagged spring string c. The fourth crossbars 121 are corresponding to the third crossbars 111. The third crossbars 111 and the fourth crossbars 121 can jointly push the bagged spring string c.

[0043] That is, the tension spring mechanism 100 also includes a fourth transmission component 120 spaced apart from the third transmission component 110. A tension spring channel 140 is formed between the third transmission component 110 and the fourth transmission component 120. The fourth transmission component 120 includes two sets of opposing fourth chains 122. Multiple fourth crossbars 121 are connected between the two sets of fourth chains 122 by chain plates. The multiple fourth crossbars 121 are spaced apart on the upper side of the bag spring string c along the conveying direction, and the fourth crossbars 121 correspond one-to-one with the third crossbars 111. The bag spring string c is clamped between the third crossbars 111 and the fourth crossbars 121, and is pushed together by both in the tension spring channel 140, making the conveying of the bag spring string c more stable and reliable.

[0044] In some embodiments, such as Figure 1 and Figure 2 As shown, the tension spring mechanism 100 includes a plate 130 spaced apart from the third conveying assembly 110. The plate 130 is used to support or press the bag spring string c flowing through the tension spring channel 140. The side of the plate 130 that contacts the bag spring string c is provided with at least one of a roller, a wheel, or a flow strip to roll and contact the bag spring string c.

[0045] Specifically, such as Figure 1 and Figure 2 As shown, a flow bar 131 is provided on the plate 130, and the third crossbar 111 can push the bag spring string c so that the flow bar 131 rolls in contact with the bag spring string c. That is to say, the tension spring mechanism 100 can also use the plate 130 to replace the fourth conveying assembly 120. Multiple freely rolling flow bars 131 are installed on the plate 130. The flow bars 131 are located on the upper side of the bag spring string c, and the third crossbar 111 pushes the bag spring string c forward along the material transport direction on the lower side of the bag spring string c, while the flow bar 131 rolls in contact with the bag spring string c on the other side of the bag spring string c. The plate 130 can provide necessary support for the bag spring string c and reduce friction with the bag spring string c.

[0046] In some embodiments, such as Figure 1 and Figure 3As shown, the welding mechanism 200 includes a welding blade 210, an ultrasonic probe 220, and a drive structure 230. The drive structure 230 can drive the welding blade 210 and the ultrasonic probe 220 to move closer to each other and / or further apart. That is, the welding mechanism 200 is located downstream of the push-spring mechanism 300 and is used to perform ultrasonic welding on the passing fabric bag b to form a bag chamber for independently wrapping the spring a. The bag chamber and the spring a together form a continuous bag spring string c. The welding mechanism 200 mainly includes a welding blade 210, an ultrasonic probe 220, and a drive structure 230. The drive structure 230 is used to drive the welding blade 210 and the ultrasonic probe 220 to perform reciprocating motions towards or away from each other to weld the fabric bag b.

[0047] Furthermore, such as Figure 3 , Figure 4 and Figure 6 As shown, the welding mechanism 200 includes a welding knife connector 240 and an ultrasonic head connector 250. The drive structure 230 includes a motor 231 and a turntable 232. The turntable 232 is mounted on the motor 231, and the motor 231 can drive the turntable 232 to rotate. The ultrasonic head connector 250 is rotatably connected to the turntable 232, and the ultrasonic head 220 can move vertically with the movement of the ultrasonic head connector 250. The welding knife connector 240 is rotatably connected to the turntable 232, and the welding knife 210 can move vertically with the movement of the welding knife connector 240. The position of the ultrasonic head connector 250 rotatably connected to the turntable 232 is symmetrical about the motor 231 to the position of the welding knife connector 240 rotatably connected to the turntable 232. The motor 231 can drive the turntable 232 to rotate so that the welding knife 210 and the ultrasonic head 220 move toward or away from each other.

[0048] In other words, such as Figure 4 As shown, the drive structure 230 includes a motor 231 and a turntable 232. The turntable 232 is mounted on the output shaft of the motor 231 and is driven to rotate by the motor 231.

[0049] The welding mechanism 200 includes a welding knife connector 240 and an ultrasonic mold head connector 250, such as Figure 3 As shown, the welding knife connector 240 includes a first crossbeam 241, a second crossbeam 242, a slide rod 243, and a first connecting rod 244. The first crossbeam 241 and the second crossbeam 242 are fixedly connected by two slide rods 243 to form the frame of the welding knife connector 240. Figure 4 As shown, one end of the first connecting rod 244 is rotatably connected to the second crossbeam 242 via a pivot, as... Figure 6As shown, the other end of the second connecting rod 252 is rotatably connected to the eccentric position of the turntable 232 via a bearing. The position of the second connecting rod 252 connected to the turntable 232 is symmetrical with respect to the position of the first connecting rod 244 connected to the turntable 232 about the position of the turntable 232 connected to the output shaft of the motor 231. The welding knife 210 is movably connected to the first crossbeam 241 via an elastic element. The elastic element provides a buffer for the welding knife 210, reducing the squeezing force when the welding knife 210 and the ultrasonic mold head 220 move relative to each other, thereby avoiding damage to the welding knife 210 or the ultrasonic mold head 220 and extending its service life.

[0050] like Figure 3 As shown, the ultrasonic transducer connector 250 includes a transducer bracket 251 and a second connecting rod 252. The ultrasonic transducer 220 is fixedly mounted on the transducer bracket 251, and one end of the second connecting rod 252 is rotatably connected to the transducer bracket 251 via a bearing. Figure 6 As shown, the other end of the second connecting rod 252 is rotatably connected to the eccentric position of the turntable 232 via a bearing. Figure 3 As shown, the mold head support 251 has through holes at both ends in the vertical direction. The two sliding rods 243 of the welding knife connector 240 are slidably connected to the through holes of the mold head support 251, thereby enabling the mold head support 251 to drive the ultrasonic mold head 220 to slide in the vertical direction.

[0051] Among them, such as Figure 3 As shown, the drive assembly also includes a motor mounting plate 233. The motor 231 is fixed by the motor mounting plate 233. The motor mounting plate 233 has sleeves on both sides, and the sleeves are open in the vertical direction. The two sliding rods 243 of the welding knife connector 240 are slidably connected to the sleeves of the motor mounting plate 233, so that the frame of the welding knife connector 240 can slide relative to the motor mounting plate 233 in the vertical direction.

[0052] like Figure 4 and Figure 6 As shown, when motor 231 drives turntable 232 to rotate, first connecting rod 244 drives second crossbeam 242 to reciprocate vertically, and second connecting rod 252 drives mold head support 251 to reciprocate vertically. Since the positions of second connecting rod 252 and turntable 232 are symmetrical about the position of turntable 232 connected to motor 231, when second crossbeam 242 rises, mold head support 251 falls; when second crossbeam 242 falls, mold head support 251 rises. Therefore, the rotation of motor 231 synchronously drives welding blade 210 and ultrasonic mold head 220 to move closer to or further away from each other to complete the welding action. It can be understood that, as... Figure 6The first link 244 and the second link 252 shown are both located on the same side of the turntable 232. The motor 231 needs to rotate forward and backward alternately to make the welding knife 210 and the ultrasonic mold head 220 open and close continuously.

[0053] In some embodiments, such as Figure 4 and Figure 5 As shown, the turntable 232 includes a first disc 2321 and a second disc 2322. Both the first disc 2321 and the second disc 2322 have mounting holes 2323 for connecting the motor 231 at an eccentric position. The mounting holes 2323 of the first disc 2321 and the second disc 2322 are coaxially arranged. The second disc 2322 and the first disc 2321 are eccentrically arranged with respect to each other. The welding knife connector 240 is rotatably connected to the first disc 2321, and the ultrasonic mold head connector 250 is rotatably connected to the second disc 2322.

[0054] In other words, to further optimize the continuity and smoothness of the motion, the turntable 232 can adopt a double-disc structure, including a first disc 2321 and a second disc 2322. Both the first disc 2321 and the second disc 2322 have coaxial mounting holes 2323 at eccentric locations for connecting the motor 231, but the centers of the two discs are eccentrically positioned relative to each other. The first connecting rod 244 wraps around the outer ring of the first disc 2321 via a bearing and is rotatably connected to it. Similarly, the second connecting rod 252 wraps around the outer ring of the second disc 2322 via a bearing and is rotatably connected to the first disc 2321. In this way, the motor 231 no longer needs to alternate between forward and reverse rotation to continuously drive the opening and closing of the welding knife 210 and the ultrasonic mold head 220, resulting in faster operation, higher efficiency, more precise motion trajectories for the welding knife 210 and the ultrasonic mold head 220, and more stable welding effects.

[0055] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this application. Furthermore, unless otherwise specified, the embodiments and features described in the embodiments of this application can be combined with each other.

Claims

1. A spring feeding device, characterized in that, include: A push spring mechanism for pushing an unsealed spring located inside the bag; A welding mechanism is located downstream of the push spring mechanism; the welding mechanism is used to weld the passing cloth bag to form a bag chamber and encapsulate the spring inside the bag. A bag chamber and a spring encapsulated in the bag chamber together form a bag spring, and several bag springs form a bag spring string. A tension spring mechanism, located downstream of the welding mechanism, is used to push the bagged spring string; Within the time cycle of completing one bag spring, the spring feeding device can change the width of the bag chamber by changing the pushing distance of the tension spring mechanism relative to the push spring mechanism.

2. The spring feeding device according to claim 1, characterized in that, The spring pusher mechanism includes a first conveying component and a second conveying component spaced apart, with a spring pusher channel formed between the first and second conveying components for conveying the bag and the spring. The first conveying component includes a first crossbar, with multiple first crossbars spaced apart along the conveying direction of the bag and the spring. The second conveying component includes a second crossbar, with multiple second crossbars spaced apart along the conveying direction of the bag and the spring. The second crossbars and the first crossbars are correspondingly arranged within the spring pusher channel. The first and second crossbars can jointly push the spring.

3. The spring feeding device according to claim 2, characterized in that, The push spring channel gradually narrows along the conveying direction.

4. The spring feeding device according to claim 2, characterized in that, The first crossbar includes a circular tube and a mandrel, the circular tube being rotatable relative to the mandrel, and the mandrel being fixedly mounted on the first conveying assembly; and / or The second crossbar includes a round tube and a spindle. The round tube is rotatable relative to the spindle, and the spindle is fixedly mounted on the second conveying assembly.

5. The spring feeding device according to claim 2, characterized in that, The two ends of the first crossbar are rotatably connected to the first conveying assembly, and / or the two ends of the second crossbar are rotatably connected to the second conveying assembly.

6. The spring feeding device according to claim 1, characterized in that, The tension spring mechanism includes a third conveying component, which includes a third crossbar. Multiple third crossbars are spaced apart along the conveying direction of the bagged spring string, and the third crossbars are capable of pushing the bagged spring string.

7. The spring feeding device according to claim 6, characterized in that, The tension spring mechanism includes a fourth conveying component spaced apart from the third conveying component. A tension spring channel is formed between the third and fourth conveying components for conveying a string of bagged springs. The fourth conveying component includes a fourth crossbar, and multiple fourth crossbars are spaced apart along the conveying direction of the bagged springs. The fourth crossbars correspond to the third crossbars in the tension spring channel. The third and fourth crossbars can jointly push the bagged springs.

8. The spring feeding device according to claim 6, characterized in that, The tension spring mechanism includes a plate spaced apart from the third conveying assembly, the plate being used to support or press down the bag spring string, and the third crossbar being capable of pushing the bag spring string.

9. The spring feeding device according to claim 8, characterized in that, The side of the plate that contacts the bagged spring string is provided with at least one of a roller, a wheel, or a flow strip to roll and contact the bagged spring string.

10. The spring feeding device according to claim 1, characterized in that, The welding mechanism includes a welding knife, an ultrasonic mold head, and a driving structure. The driving structure can drive the welding knife and the ultrasonic mold head to move closer to each other and / or further apart.

11. The spring feeding device according to claim 10, characterized in that, The welding mechanism includes a welding knife connector and an ultrasonic mold head connector. The driving structure includes a motor and a turntable. The turntable is mounted on the motor, and the motor can drive the turntable to rotate. The ultrasonic mold head connector is rotatably connected to the turntable, and the ultrasonic mold head can move vertically with the movement of the ultrasonic mold head connector. The welding knife connector is rotatably connected to the turntable, and the welding knife can move vertically with the movement of the welding knife connector. The positions of the ultrasonic mold head connector and the welding knife connector on the turntable are symmetrical about the motor. The motor can drive the turntable to rotate so that the welding knife and the ultrasonic mold head move towards or away from each other.

12. The spring feeding device according to claim 11, characterized in that, The turntable includes a first disk and a second disk. Both the first disk and the second disk have mounting holes for connecting the motor formed at an eccentric position. The mounting holes of the first disk and the second disk are coaxially arranged. The second disk and the first disk are eccentrically arranged relative to each other. The welding knife connector is rotatably connected to the first disk, and the ultrasonic mold head connector is rotatably connected to the second disk.

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