Pocketed spring welding device and pocketed spring string production equipment

Abstract

The application discloses a bagged spring welding device and a bagged spring string production equipment, wherein the bagged spring welding device comprises a transverse welding assembly, the transverse welding assembly comprises a guide rod, a first welding module and a second welding module, the first welding module comprises a first welding cutter, a first frame and a second driving mechanism, the second welding module comprises a second welding cutter, a second frame and a third driving mechanism, the first frame and the second frame are respectively in lifting and sliding connection with the guide rod, the first frame comprises an extension piece, the second end of the extension piece extends to the height position of the third driving mechanism, the second driving mechanism and the third driving mechanism are installed at the same or similar height position, the installation of the two driving mechanisms is facilitated, and the two driving mechanisms can be driven by the same power source, the extension piece is arranged in the guide rod, the structure is more compact, the lifting action of the extension piece does not interfere with the lifting action of the second frame, and the application is used in the technical field of bagged spring string production and manufacturing.

Description

Technical Field

[0001] This invention relates to the field of bagged spring string manufacturing technology, and particularly to bagged spring welding apparatus and bagged spring string production equipment. Background Technology

[0002] The current manufacturing process for bagged springs typically involves first winding the springs using a spring coiling machine, then compressing and conveying the springs to the bagging mechanism. Related technologies integrate spring coiling, compression, welding, conveying, and bagging mechanisms into automated equipment. However, for welding bagged springs, the drive mechanisms that propel the first and second welding blades to move up and down are located at the top and bottom, respectively. These drive mechanisms are bulky and difficult to install, and the entire welding process requires two motors, resulting in a complex structure and high cost. Summary of the Invention

[0003] The purpose of this invention is to at least solve one of the technical problems existing in the prior art, and to provide a compact bag spring welding device and bag spring string production equipment, which enables the drive mechanism that drives the two welding knives to be installed at the same height position, thus facilitating the installation of the drive mechanism.

[0004] According to a first aspect of the present invention, a bag spring welding apparatus is provided, comprising a transverse welding assembly for transversely welding fabric to form an encapsulated bag spring. The transverse welding assembly includes a guide rod, a first welding module, and a second welding module. The first welding module includes a first welding blade, a first frame, and a second driving mechanism. The second welding module includes a second welding blade, a second frame, and a third driving mechanism. The first welding blade and the second welding blade cooperate to weld the fabric. The first frame and the second frame are respectively slidably connected to the guide rod in a lifting manner. The first frame is connected to the first welding blade. The second driving mechanism is used to drive the first frame to lift, thereby driving the first welding blade to lift. The second frame is connected to the second welding blade. The third driving mechanism is used to drive the second frame to lift, thereby driving the second welding blade to lift.

[0005] The first frame includes an extension member having a first end and a second end. The first end of the extension member is located at or near the height of the first welding knife. The second end of the extension member is directly or indirectly connected to the second driving mechanism. The second end of the extension member extends to the height of the third driving mechanism, so that the second driving mechanism and the third driving mechanism are installed at the same or similar height. The second driving mechanism and the third driving mechanism are driven by the same power source. The guide rod has a hollow structure, and the extension member is placed inside the guide rod. The second frame is slidably connected to the outer wall of the guide rod.

[0006] The aforementioned bag spring welding device has at least the following beneficial effects: by horizontally welding the fabric through the horizontal welding assembly, the fabric forms individual, spaced bag springs. The extension of the first frame of the first welding module extends to the height of the third drive mechanism of the second welding module, thereby enabling the second and third drive mechanisms to be installed at the same or similar heights, facilitating the installation of the two drive mechanisms. The second and third drive mechanisms can be driven by the same power source, that is, one motor can realize the lifting and lowering action of the two welding blades, reducing manufacturing costs. Furthermore, the extension of the first frame and the second frame are respectively located inside and outside the guide rod, making the structure more compact, and the lifting and lowering action of the extension and the second frame will not interfere with each other.

[0007] According to the first aspect of the present invention, the bag spring welding apparatus, both the second drive mechanism and the third drive mechanism adopt an eccentric transmission mechanism, wherein the second drive mechanism includes a first eccentric wheel and a third connecting rod, one end of the third connecting rod is rotatably connected to the first eccentric wheel, and the other end of the third connecting rod is directly or indirectly connected to the extension member; the third drive mechanism includes a second eccentric wheel and a fourth connecting rod, one end of the fourth connecting rod is rotatably connected to the second eccentric wheel, and the other end of the fourth connecting rod is rotatably connected to the second frame.

[0008] According to the first aspect of the present invention, in the bag spring welding apparatus, the first eccentric wheel and the second eccentric wheel are fixedly connected or are an integral structure, the first eccentric wheel and the second eccentric wheel have the same center of rotation, and the eccentric directions of the first eccentric wheel and the second eccentric wheel are opposite, so that the lifting and lowering directions of the first welding knife and the second welding knife are opposite.

[0009] According to a first aspect of the present invention, in the bag spring welding apparatus, the first frame is elastically connected to the first welding blade.

[0010] According to a first aspect embodiment of the present invention, the bag spring welding apparatus includes a frame and a first drive mechanism. The lower part of the transverse welding assembly is rotatably connected to the frame. The first welding blade and the second welding blade have a first state in which they cooperate to clamp and weld the fabric. The first drive mechanism is used to drive the transverse welding assembly to swing about the rotatable connection point with the frame in the first state, so as to pull the fabric forward.

[0011] According to a first aspect embodiment of the present invention, the bag spring welding apparatus further includes a conveying assembly and a linkage mechanism. The conveying assembly is disposed downstream of the transverse welding assembly and includes a rotary conveyor. The linkage mechanism includes a first crank, a first connecting rod, and a one-way bearing. The rotary conveyor is drivenly connected to the first crank through the one-way bearing. One end of the first connecting rod is rotatably connected to the transverse welding assembly, and the other end of the first connecting rod is rotatably connected to the first crank, so that the oscillation of the transverse welding assembly drives the first crank, the one-way bearing, and the rotary conveyor to rotate through the first connecting rod.

[0012] According to a first aspect of the present invention, the bag spring welding apparatus includes a counterweight assembly, one end of which is rotatably connected to the frame, and the other end of which is used to press the bag spring string onto the rotating conveyor by its own weight, so that the bag spring string is conveyed forward with the rotation of the rotating conveyor.

[0013] According to a first aspect embodiment of the present invention, the first driving mechanism includes a first driving member, a second crank, and a second connecting rod. One end of the second connecting rod is rotatably connected to the second crank, and the other end of the second connecting rod is rotatably connected to the transverse welding assembly. The first driving member is used to drive the second crank to rotate, so as to drive the transverse welding assembly to swing through the second connecting rod.

[0014] According to a second aspect of the present invention, a bag spring string production apparatus is provided, including the bag spring welding device described above.

[0015] According to the second aspect of the present invention, the bagged spring string production equipment further includes:

[0016] A coiling device is used to coil steel wire into a spring.

[0017] A spring conveying device includes a first conveyor belt and a second conveyor belt, at least a portion of the first conveyor belt and the second conveyor belt being arranged in a V-shape to form a wide end and a narrow end, so as to compress and convey the spring;

[0018] A spring transfer device for conveying a spring from the coiling spring device to the spring conveying device;

[0019] A fabric feeding mechanism for conveying fabric, the fabric feeding mechanism including a guide plate for guiding the fabric into a U-shape, the guide plate being disposed around the narrow end; and

[0020] A longitudinal welding assembly, positioned above the narrow end and downstream of the guide plate, is used for longitudinally welding the upper opening of the U-shaped fabric;

[0021] The transverse welding assembly is located downstream of the spring conveying device.

[0022] According to a second aspect embodiment of the present invention, the bagged spring string production equipment includes a spring transfer device comprising a guide assembly and a closed-loop conveying mechanism, wherein the guide assembly guides at least a portion of the conveying mechanism to form an inwardly curved and recessed conveying area, and the guide assembly is disposed on the recessed side of the conveying area.

[0023] According to a second aspect of the present invention, the bag spring string production equipment includes a chain as the conveying mechanism and a guiding assembly comprising at least one guide member, wherein the guide member is at least one of a plate, a roller, and a sprocket. Attached Figure Description

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0025] Figure 1 This is a front view of the bag spring welding device according to an embodiment of the present invention;

[0026] Figure 2 This is a schematic diagram of the structure of the transverse welding assembly swinging back and forth according to an embodiment of the present invention;

[0027] Figure 3 This is a partial structural schematic diagram of the first driving mechanism and the transverse welding assembly according to an embodiment of the present invention;

[0028] Figure 4 This is a schematic diagram of the structure of the transverse welding assembly according to an embodiment of the present invention;

[0029] Figure 5 This is a cross-sectional structural diagram of the transverse welding assembly according to an embodiment of the present invention;

[0030] Figure 6 This is a schematic diagram of the structure of the first welding module in an embodiment of the present invention;

[0031] Figure 7 This is a schematic diagram of the structure of the second welding module according to an embodiment of the present invention;

[0032] Figure 8 This is a partial cross-sectional structural diagram of the second and third driving mechanisms according to an embodiment of the present invention;

[0033] Figure 9 This is a front view of the bag spring string production equipment according to an embodiment of the present invention;

[0034] Figure 10 This is a flowchart of the production process of the bagged spring string production equipment according to an embodiment of the present invention;

[0035] Figure 11 This is a top view of the spring conveying device according to an embodiment of the present invention;

[0036] Figure 12 This is a schematic diagram of the structure of a spring transfer device according to another embodiment of the present invention;

[0037] Figure 13 This is a partial structural schematic diagram of the guide component according to the first embodiment of the present invention;

[0038] Figure 14 This is a partial structural schematic diagram of the guide component according to the second embodiment of the present invention;

[0039] Figure 15 yes Figure 13 and Figure 14 A partial side view of the guide component in the image;

[0040] Figure 16 This is a partial structural schematic diagram of the guide component according to the third embodiment of the present invention;

[0041] Figure 17 This is a partial structural schematic diagram of the guide component according to the fourth embodiment of the present invention;

[0042] Figure 18 yes Figure 16 and Figure 17 A partial side view of the guide component in the image;

[0043] Figure 19 This is a partial structural schematic diagram of the guide component according to the fifth embodiment of the present invention;

[0044] Figure 20 This is a partial structural schematic diagram of the guide component according to the sixth embodiment of the present invention;

[0045] Figure 21 yes Figure 20 A partial cross-sectional view of the central guide component;

[0046] Figure 22 This is a partial structural schematic diagram of the guide component according to the seventh embodiment of the present invention;

[0047] Reference numerals: 10 for bagged spring welding device, 100 for frame, 200 for transverse welding assembly, 210 for first welding module, 211 for first welding blade, 212 for first frame, 2121 for first connecting plate, 2122 for second connecting plate, 2123 for first sliding bearing sleeve, 2124 for second sliding bearing sleeve, 2125 for extension, 213 for second drive mechanism, 213 for first eccentric wheel, 2131 for third connecting rod, 2132 for spring, 214 for limit shaft, 215 for second welding module, 220 for second welding blade, 221 for second frame, 222 for third connecting plate, 2221 for connecting rod, 2222 for fourth connecting plate, 2223 for third drive mechanism, 223 for second eccentric wheel, 2231 for fourth connecting rod, 2232 for first rotating connection point, 230 for second rotating connection point, 240 for guide rod, 250 for second drive component, 260 for output shaft, 261 for support plate. 0. Swing shaft 280, shaft hole 290, first drive mechanism 300, first drive component 310, second crank 320, second connecting rod 330, rotary conveyor component 400, linkage mechanism 500, first crank 510, first connecting rod 520, counterweight assembly 600, side plate 610, first roller shaft 620, arc plate 630, one-way bearing 700, coil spring device 20, spring conveying device 30, first conveyor belt 31, second conveyor belt 32, wide end 33, narrow end 34, manual adjustment device 35, spring transfer device 40, magnetic base 41, conveying mechanism 42, conveying area 421, chain 422, connecting frame 423, guide assembly 43, guide component 431, support frame 432, connecting strip 434, fabric feeding mechanism 50, guide plate 51, longitudinal welding assembly 60, roller 61, third welding knife 62, fourth welding knife 63. Detailed Implementation

[0048] This section will describe in detail specific embodiments of the present invention. Preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present invention, but they should not be construed as limiting the scope of protection of the present invention.

[0049] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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 limiting this invention.

[0050] In the description of this invention, "several" means one or more, "more than" 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.

[0051] In the description of this invention, unless otherwise explicitly defined, terms such as "setting," "installing," and "connecting" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0052] Reference Figures 1 to 8 This invention provides a bag spring welding device 10, including a frame 100, a transverse welding assembly 200, a first drive mechanism 300, a conveying assembly, and a linkage mechanism 500. The transverse welding assembly 200 is used for transverse (left-right direction is transverse, front-back direction is longitudinal) welding of fabric to form a bag spring. The lower part of the transverse welding assembly 200 is rotatably connected to the frame 100. The transverse welding assembly 200 includes a first welding module 210 and a second welding module 220. The first welding module 210 includes a first welding blade 211, and the second welding module 220 includes a second welding blade 221. The first welding blade 211 and the second welding blade 221 are arranged opposite to each other, with the first welding blade 211 located above the second welding blade 221. A welding knife 211 and a second welding knife 221 are in a first state where they cooperate to clamp and weld the fabric. In the first state, the first drive mechanism 300 drives the transverse welding assembly 200 to swing forward about the rotational connection point with the frame 100. The conveying assembly is located downstream of the transverse welding assembly 200. The conveying assembly includes a rotating conveyor 400, which is rotatably connected to the frame 100. The linkage mechanism 500 includes a first crank 510, a first connecting rod 520, and a one-way bearing 700. The rotating conveyor 400 is connected to the first crank 510 via the one-way bearing 700. One end of the first connecting rod 520 is rotatably connected to the transverse welding assembly 200, and the other end of the first connecting rod 520 is rotatably connected to the first crank 510.

[0053] In this embodiment, the bag spring welding device 10 welds fabric laterally using a transverse welding assembly 200, forming individual, spaced bag springs, which in turn form a bag spring string. The transverse welding assembly 200 is rotatably connected to the frame 100. When the first welding blade 211 and the second welding blade 221 work together to clamp and weld the fabric, the first drive mechanism 300 drives the transverse welding assembly 200 to swing forward, thereby pulling a portion of the bag spring string forward a short distance (approximately the width of one bag spring). Simultaneously, the downstream conveyor assembly... At the front end of the conveyor belt of bagged springs, a linkage mechanism 500 is set to link the rotary conveyor 400 and the transverse welding assembly 200. The swinging of the transverse welding assembly 200 drives the first connecting rod 520 to move, which in turn drives the first crank 510, the one-way bearing 700, and the rotary conveyor 400 to rotate. The rotary conveyor 400 rotates to convey the bagged springs. In this way, a motor drive is not required at the conveyor assembly. The swinging of the transverse welding assembly 200 and the rotation of the rotary conveyor 400 are achieved through the linkage mechanism 500, resulting in a simple and compact structure that reduces manufacturing costs. After the transverse welding assembly 200 pulls the bagged springs forward a short distance, the first welding blade 211 and the second welding blade 221 are released, and the transverse welding assembly 200 swings backward to reset and continue the next welding cycle. Figure 2 The transverse welding assembly 200 reciprocates back and forth. A one-way bearing 700 is installed so that the rotary conveyor 400 can only rotate in one direction.

[0054] Specifically, the transverse welding assembly 200 is ultrasonically welded.

[0055] Understandably, the rotary conveyor 400 can convey bagged spring strings in different ways, such as directly conveying the bagged spring strings or acting as a drive wheel to drive the bagged spring strings via a conveyor belt.

[0056] Reference Figure 1 In some embodiments, the bag spring welding device 10 includes a counterweight assembly 600. One end of the counterweight assembly 600 is rotatably connected to the frame 100, and the other end of the counterweight assembly 600 has a certain weight, which presses the bag spring string onto the rotary conveyor 400, so that the bag spring string is conveyed forward with the rotation of the rotary conveyor 400. Specifically, the counterweight assembly 600 includes two side plates 610, a first roller shaft 620 disposed between the top ends of the two side plates 610 and rotatably connected to the side plates 610, and an arc-shaped plate 630. The arc-shaped plate 630 is fixedly connected to the top end of the side plates 610 or to the first roller shaft 620. The bottom end of the side plates 610 is rotatably connected to the frame 100. The first roller shaft 620 at the top end of the side plates 610 has a certain weight, which drives the arc-shaped plate 630 to press down, so that the bag spring string is tightly attached to the rotary conveyor 400 and conveyed with the rotary conveyor 400.

[0057] Reference Figures 1 to 3 In some embodiments, the first drive mechanism 300 includes a first drive member 310, a second crank 320, and a second connecting rod 330. Specifically, the first drive member 310 is a motor, one end of the second connecting rod 330 is rotatably connected to the second crank 320, and the other end of the second connecting rod 330 is rotatably connected to the transverse welding assembly 200. The first drive member 310 drives the second crank 320 to rotate, the second crank 320 drives the second connecting rod 330 to move, and the second connecting rod 330 drives the transverse welding assembly 200 to swing. The first rotational connection point 230 between the transverse welding assembly 200 and the frame 100 is located below, and the second rotational connection point 240 between the transverse welding assembly 200 and the second connecting rod 330 is located above. The transverse welding assembly 200 and the first connecting rod 520 are also rotatably connected to the second rotational connection point 240, resulting in a compact structure.

[0058] Reference Figures 4 to 7 In some embodiments, the transverse welding assembly 200 includes two vertically arranged guide rods 250. The first welding module 210 includes a first frame 212 and a second drive mechanism 213. The second welding module 220 includes a second frame 222 and a third drive mechanism 223. The first frame 212 and the second frame 222 are respectively slidably connected to the guide rods 250. The first frame 212 is connected to the first welding knife 211, and the second drive mechanism 213 can drive the first frame 212 to move up and down, thereby driving the first welding knife 211 to move up and down. The second frame 222 is connected to the second welding knife 221, and the third drive mechanism 223 can drive the second frame 222 to move up and down, thereby driving the second welding knife 221 to move up and down. That is, the first welding module 210 is slidably connected to the same guide rod 250 through the first frame 212, and the second welding module 220 is slidably connected to the same guide rod 250 through the second frame 222, resulting in a compact structure. The guide rod 250 is fixedly connected to the support plate 270, and the support plate 270 is fixedly connected to the two sides of the swing shaft 280. The swing shaft 280 is rotatably connected to the frame 100.

[0059] In some embodiments, the first frame 212 includes a first connecting plate 2121, a second connecting plate 2122, a first sliding bearing sleeve 2123, a second sliding bearing sleeve 2124, and an extension member 2125 fixedly connected to form the frame. The extension member 2125 has a first end (upper end) and a second end (lower end). The first end of the extension member 2125 is located at or near the height of the first welding knife 211. The first end of the extension member 2125 is fixedly connected to the first sliding bearing sleeve 2123. The first sliding bearing sleeve 2123 is fixedly connected to the first connecting plate 2121 and is slidably connected to the guide rod 250. The first connecting plate 2121 is connected to the first welding knife 211. The second end of the extension member 2125 is connected to the second drive mechanism 21. 3. Indirect connection: Specifically, the second end of the extension 2125 is fixedly connected to the second sliding bearing sleeve 2124, the second sliding bearing sleeve 2124 is fixedly connected to the second connecting plate 2122 and is slidably connected to the guide rod 250. The second drive mechanism 213 is connected to the second connecting plate 2122 and drives the second connecting plate 2122 to move up and down. Then, the first welding knife 211 is driven to move up and down in sequence through the second sliding bearing sleeve 2124, the extension 2125, the first sliding bearing sleeve 2123 and the first connecting plate 2121. The second end of the extension 2125 extends to the height position of the third drive mechanism 223, so that the second drive mechanism 213 and the third drive mechanism 223 can be installed at the same or similar height positions. The first welding blade 211 is located above the second welding blade 221. In existing transverse welding assemblies 200, the drive mechanisms that drive the first welding blade 211 to move up and down are all located at the top. However, the drive mechanisms themselves are heavy, inconvenient to install, and occupy a certain amount of installation space. In this embodiment, the extension member 2125 enables the second drive mechanism 213 that drives the first welding blade 211 to move to the same position as the third drive mechanism 223 below, making the structure more compact. Furthermore, the second drive mechanism 213 and the third drive mechanism 223 can be driven by the same power source, that is, one motor can realize the lifting and lowering of the two welding blades, reducing manufacturing costs.

[0060] In some embodiments, the guide rod 250 has a hollow structure, the extension member 2125 is a rod and is placed inside the guide rod 250, and the second frame 222 is slidably connected to the outer wall of the guide rod 250. Thus, the extension member 2125 of the first frame 212 and the second frame 222 are respectively disposed inside and outside the guide rod 250, resulting in a compact structure, and the lifting and lowering movements of the extension member 2125 and the second frame 222 do not interfere with each other.

[0061] Of course, it is understandable that in some other embodiments, the second end of the extension 2125 can be directly rotatably connected to the transmission link of the second drive mechanism 213, which can also achieve the lifting and lowering drive of the first welding knife 211.

[0062] Specifically, the second frame 222 includes a third connecting plate 2221, a connecting rod 2222, and a fourth connecting plate 2223. The upper third connecting plate 2221 and the lower fourth connecting plate 2223 are connected by the connecting rod 2222. The second welding knife 221 is fixedly connected to the third connecting plate 2221. The third driving mechanism 223 is connected to the fourth connecting plate 2223, driving the fourth connecting plate 2223 to rise and fall, thereby driving the second welding knife 221 to rise and fall.

[0063] In some embodiments, both the second drive mechanism 213 and the third drive mechanism 223 employ eccentric transmission mechanisms. The second drive mechanism 213 includes a first eccentric wheel 2131 and a third connecting rod 2132. One end of the third connecting rod 2132 is rotatably connected to the first eccentric wheel 2131, and the other end of the third connecting rod 2132 is rotatably connected to the second connecting plate 2122. The extension member 2125 is raised and lowered via the second connecting plate 2122. The third drive mechanism 223 includes a second eccentric wheel 2231 and a fourth connecting rod 2232. One end of the fourth connecting rod 2232 is rotatably connected to the second eccentric wheel 2231, and the other end of the fourth connecting rod 2232 is rotatably connected to the fourth connecting plate 2223 of the second frame 222.

[0064] Reference Figure 3 and Figure 8 Furthermore, the transverse welding assembly 200 includes a second driving element 260 (i.e., a power source), which is a motor that drives the output shaft 261 to rotate. The first eccentric wheel 2131 and the second eccentric wheel 2231 are fixedly connected or are an integral structure. The first eccentric wheel 2131 and the second eccentric wheel 2231 have the same center of rotation. The integral structure formed by the first eccentric wheel 2131 and the second eccentric wheel 2231 is provided with a shaft hole 290 (at the location of the center of rotation) that is fixedly connected to the output shaft 261. The output shaft 261 simultaneously drives the first eccentric wheel 2131 and the second eccentric wheel 2231. The first eccentric wheel 2131 and the second eccentric wheel 2231 rotate in opposite directions. The eccentric direction refers to the direction in which the rotation center of the eccentric wheel deviates from its centroid. For example, referring to Figures 2 and 3, the output shaft 261 rotates counterclockwise. At a certain moment, the eccentric position of the first eccentric wheel 2131 is above, and the eccentric position of the second eccentric wheel 2231 is below. The opposite eccentric directions of the first eccentric wheel 2131 and the second eccentric wheel 2231 ensure that the lifting and lowering directions of the first welding knife 211 and the second welding knife 221 are always opposite, allowing them to move towards each other to clamp the welding fabric or move away from each other to release the fabric. Thus, a single motor can simultaneously drive the first welding knife 211 and the second welding knife 221 to perform clamping or releasing actions, resulting in a simple and compact structure.

[0065] In some embodiments, the first connecting plate 2121 of the first frame 212 is elastically connected to the first welding knife 211, which can reduce the impact force generated by the collision when the first welding knife 211 and the second welding knife 221 cooperate and clamp each other, thus playing a buffering role. Specifically, a spring 214 is provided between the first connecting plate 2121 and the first welding knife 211. The spring 214 is sleeved on the limiting shaft 215. Grooves and protrusions that slide against each other are provided between the upper ends of the first welding knife 211 and the first sliding bearing sleeves 2123 on both sides, so as to guide the lifting and lowering movement of the first welding knife 211.

[0066] Reference Figures 9 to 11 This invention also provides a bag spring string production equipment, including the aforementioned bag spring welding device 10. The bag spring welding device 10 includes a transverse welding assembly 200 that transversely welds fabric to form individual, spaced bag springs, thereby forming a bag spring string. A linkage mechanism 500 enables the transverse welding assembly 200 to be linked with a conveying assembly. The equipment has a compact structure, reduces the number of motors required, and lowers manufacturing costs.

[0067] In some embodiments, the bagged spring string production equipment further includes a spring coiling device 20, a spring conveying device 30, a spring transfer device 40, a fabric feeding mechanism 50, and a longitudinal welding assembly 60. The spring coiling device 20 can coil one or more steel wires into springs and cut them. The spring coiling device 20 can switch between steel wires of different diameters according to the spring parameters and automatically coil them into springs of different diameters, pitches, and lengths through mechanical adjustment. The spring transfer device 40 conveys the springs from the spring coiling device 20 to the spring conveying device 30. (Refer to...) Figure 11 The spring conveying device 30 includes a first conveyor belt 31 and a second conveyor belt 32. At least a portion of the first conveyor belt 31 and the second conveyor belt 32 are arranged in a V-shape to form a wide end 33 and a narrow end 34, so as to convey the spring forward and gradually compress it. The narrow end 34 is located at the front. The narrow end 34 of the spring conveying device 30 is also provided with a manual adjustment device 35. The width of the narrow end 34 can be adjusted by turning a screw, so that spring strings with different compression degrees or widths can be produced. The fabric feeding mechanism 50 is used to convey the fabric. The fabric feeding mechanism 50 includes a guide plate 51. The guide plate 51 is used to guide the fabric to form a U-shape. The guide plate 51 is located on the periphery of the narrow end 34 of the spring conveying device 30, so that the compressed spring is directly fed into the U-shaped fabric. The longitudinal welding assembly 60 is located above the narrow end 34 and downstream of the guide plate 51. The longitudinal welding assembly 60 is used to longitudinally weld the upper opening of the U-shaped fabric. The transverse welding assembly 200 is located downstream of the spring conveying device 30.

[0068] Specifically, the longitudinal welding assembly 60 includes a third welding knife 62 and a fourth welding knife 63 arranged opposite to each other, and a set of rollers 61 at the front and back. The upper two sides of the U-shaped fabric are first folded and joined together by the rollers 61 to form a seal, and then the seal is welded and sealed by the third welding knife 62 and the fourth welding knife 63. A space for encapsulating springs is formed inside the fabric. Subsequently, the fabric is welded by the transverse welding assembly 200 to form individual pocket springs.

[0069] In some embodiments, the spring transfer device 40 includes a plurality of magnetic bases 41 for supporting and fixing the springs and a closed-loop conveying mechanism 42. The conveying mechanism 42 may be a chain or a conveyor belt. The magnetic bases 41 are spaced apart on the conveying mechanism 42. A portion of the conveying mechanism 42 is located at the spring output port of the coiling spring device 20. The springs output by the coiling spring device 20 are attracted and fixed by the magnetic bases 41 on the conveying mechanism 42. The springs are conveyed with the conveying mechanism 42 until they enter the spring conveying device 30, where they are compressed and detached from the magnetic bases 41.

[0070] Reference Figure 10 The workflow of the bagged spring string production equipment in this embodiment is as follows:

[0071] The spring is wound by the spring winding device 20, and the wound spring is attracted to the magnetic base 41 of the spring transfer device 40 at the output port of the spring winding device 20. It is then conveyed to the spring conveying device 30 by the conveying mechanism 42, where it passes through at least one inwardly curved conveying area 421 to allow the spring sufficient cooling time. The spring is conveyed from the wide end 33 to the narrow end 34 of the spring conveying device 30 and is gradually compressed to a predetermined compression amount. The fabric feeding mechanism 50 releases the fabric by rotating the air shaft. The fabric is folded into a U-shape by the guide plate 51, which wraps the spring in the narrow end 34. The rollers 61 of the longitudinal welding assembly 60 fold and close the upper two sides of the U-shaped fabric and seal them by welding with the third welding blade 62 and the fourth welding blade 63. The spring is fed into the bag at the tail of the narrow end 34. In the process, the springs are divided and independently packaged by welding through the transverse welding assembly 200. Specifically, the second driving member 260 drives the first eccentric wheel 2131 and the second eccentric wheel 2231 to rotate. Since the first eccentric wheel 2131 and the second eccentric wheel 2231 are coaxial and have opposite eccentric directions, the first welding knife 211 and the second welding knife 221 always move in opposite directions. When the first welding knife 211 and the second welding knife 221 move towards each other and clamp the fabric, the fabric is welded, completing the independent packaging of the springs and forming a bagged spring string. At the same time, the first driving mechanism 300 drives the transverse welding assembly 200 to swing forward, pulling the rear part of the bagged spring string forward. At the same time, the linkage mechanism 500 drives the rotating conveyor 400 to rotate, driving the front part of the bagged spring string forward.

[0072] In some embodiments, the spring transfer device 40 includes a guide assembly 43 that guides at least a portion of the conveying mechanism 42 to form an inwardly curved and recessed conveying region 421. The inwardly curved conveying region 421 increases the conveying distance of the spring, thereby increasing the cooling time for the spring, which still has a high temperature after winding. The guide assembly 43 is disposed on the recessed side of the conveying region 421, and the magnetic base 41 is located in the middle of the guide assembly 43.

[0073] It is understandable that the shape of the conveying mechanism 42 can be set as needed, for example: refer to Figure 9 The conveying mechanism 42 is generally L-shaped, with the curved conveying area 421 located on the short side of the L-shape; or refer to Figure 12 The conveying mechanism 42 is U-shaped, and the concave part in the middle of the U-shape is the inwardly curved conveying area 421; and multiple conveying areas 421 can be set as needed.

[0074] It is understood that the guide assembly 43 is used to guide the conveying mechanism 42 to form the conveying area 421. The guide assembly 43 has an inwardly curved shape, and its specific structure can be set differently as needed. For example, the conveying mechanism 42 uses one or more rows of chains 422, the chains 422 are fixedly connected to a connecting frame 423, a magnetic base 41 is installed on the connecting frame 423, the chains 422 and the guide assembly 43 are slidably engaged, and a guide member 431 that slidably engages with the rollers of the chain 422 can be provided on the guide assembly 43. The rollers are recessed in the middle, and the guide member 431 is fixedly set on the support frame 432. The guide member 431 is at least one of a plate, a roller, and a sprocket. Specifically, it is not limited to the following structures, see reference. Figure 13 and Figure 15 The chain 422 is configured in two rows, and correspondingly, two rows of guide members 431 are provided on both sides of the support frame 432. The guide members 431 are located between the two rows of chains 422, and the guide members 431 are rollers fixed to the support frame 432. The rollers and the middle recessed part of the rollers cooperate with each other. Figure 14 and Figure 15 The chain 422 is arranged in a row, and correspondingly, a row of guide members 431 is provided, the guide members 431 being rollers; refer to Figure 16 and Figure 18 The chain 422 is configured in two rows, and correspondingly, two rows of guide members 431 are provided, respectively located on both sides of the support frame 432. The guide members 431 are located between the two rows of chains 422, and the guide members 431 are made of protrusions, which cooperate with the middle recessed part of the roller; see reference. Figure 17 and Figure 18 The chain 422 is arranged in a row, and correspondingly, a row of guide members 431 is provided, the guide members 431 being protrusions; refer to Figure 19The chain 422 is arranged in two rows, spaced apart, on both sides below the magnetic base 41. Correspondingly, two rows of guide members 431 are provided, located on the outer side of the two rows of chains 422. The guide members 431 are protrusions. Figure 20 and Figure 21 The chain 422 is arranged in two rows, spaced apart, on both sides below the magnetic base 41. Correspondingly, two rows of guide members 431 are provided, located above the chain 422 on the corresponding side. The guide members 431 are strip-shaped and fixedly installed at the bottom of the support frame 432. The support frames 432 on both sides are fixedly connected by connecting strips 434. (Refer to...) Figure 22 The chain 422 is configured in two rows, with the two rows of chain 422 located on both sides below the magnetic base 41. Correspondingly, two rows of guide members 431 are provided, with the guide members 431 located above the chain 422 on the corresponding side. The guide members 431 are rollers and are fixed to the bottom inner side of the support frame 432.

[0075] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention 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 the present invention.

Claims

1. A bag spring welding device, characterized in that: The device includes a transverse welding assembly for transversely welding fabric to form an encapsulated pocket spring. The transverse welding assembly includes a guide rod, a first welding module, and a second welding module. The first welding module includes a first welding blade, a first frame, and a second drive mechanism. The second welding module includes a second welding blade, a second frame, and a third drive mechanism. The first and second welding blades cooperate to weld the fabric. The first and second frames are respectively slidably connected to the guide rod in a lifting manner. The first frame is connected to the first welding blade, and the second drive mechanism is used to drive the first frame to lift, thereby lifting the first welding blade. The second frame is connected to the second welding blade, and the third drive mechanism is used to drive the second frame to lift, thereby lifting the second welding blade. The bag spring welding device includes a frame and a first drive mechanism. The lower part of the transverse welding assembly is rotatably connected to the frame. The bag spring welding device also includes a conveying assembly and a linkage mechanism. The conveying assembly is located downstream of the transverse welding assembly and includes a rotary conveyor. The linkage mechanism includes a first crank, a first connecting rod, and a one-way bearing. The rotary conveyor is drivenly connected to the first crank through the one-way bearing. One end of the first connecting rod is rotatably connected to the transverse welding assembly, and the other end of the first connecting rod is rotatably connected to the first crank, so that the swing of the transverse welding assembly drives the first crank, the one-way bearing, and the rotary conveyor to rotate through the first connecting rod. The first frame includes an extension member having a first end and a second end. The first end of the extension member is located at or near the height of the first welding knife. The second end of the extension member is directly or indirectly connected to the second driving mechanism. The second end of the extension member extends to the height of the third driving mechanism, so that the second driving mechanism and the third driving mechanism are installed at the same or similar height. The second driving mechanism and the third driving mechanism are driven by the same power source. The guide rod has a hollow structure, and the extension member is placed inside the guide rod. The second frame is slidably connected to the outer wall of the guide rod.

2. The bag spring welding device according to claim 1, characterized in that: Both the second drive mechanism and the third drive mechanism adopt an eccentric transmission mechanism. The second drive mechanism includes a first eccentric wheel and a third connecting rod. One end of the third connecting rod is rotatably connected to the first eccentric wheel, and the other end of the third connecting rod is directly or indirectly connected to the extension member. The third drive mechanism includes a second eccentric wheel and a fourth connecting rod. One end of the fourth connecting rod is rotatably connected to the second eccentric wheel, and the other end of the fourth connecting rod is rotatably connected to the second frame.

3. The bag spring welding device according to claim 2, characterized in that: The first eccentric wheel and the second eccentric wheel are fixedly connected or are an integral structure. The first eccentric wheel and the second eccentric wheel have the same center of rotation, and the eccentric directions of the first eccentric wheel and the second eccentric wheel are opposite, so that the lifting and lowering directions of the first welding knife and the second welding knife are opposite.

4. The bag spring welding device according to claim 1, characterized in that: The first frame is elastically connected to the first welding knife.

5. The bag spring welding apparatus according to any one of claims 1 to 4, characterized in that: The first welding blade and the second welding blade have a first state in which they cooperate to clamp and weld the fabric. The first driving mechanism is used to drive the transverse welding assembly to swing around the rotation connection point with the frame in the first state, so as to pull the fabric forward.

6. The bag spring welding device according to claim 1, characterized in that: The bag spring welding device includes a counterweight assembly. One end of the counterweight assembly is rotatably connected to the frame, and the other end of the counterweight assembly is used to press the bag spring string onto the rotating conveyor by its own weight, so that the bag spring string is conveyed forward with the rotation of the rotating conveyor.

7. The bag spring welding device according to claim 5, characterized in that: The first driving mechanism includes a first driving member, a second crank, and a second connecting rod. One end of the second connecting rod is rotatably connected to the second crank, and the other end of the second connecting rod is rotatably connected to the transverse welding assembly. The first driving member is used to drive the second crank to rotate, so as to drive the transverse welding assembly to swing through the second connecting rod.

8. A production equipment for bagged spring strings, characterized in that: The bag spring welding apparatus includes any one of claims 1 to 7.

9. The bagged spring string production equipment according to claim 8, characterized in that, The bagged spring string production equipment also includes: A coiling device is used to coil steel wire into a spring. A spring conveying device includes a first conveyor belt and a second conveyor belt, at least a portion of the first conveyor belt and the second conveyor belt being arranged in a V-shape to form a wide end and a narrow end, so as to compress and convey the spring; A spring transfer device for conveying a spring from the coiling spring device to the spring conveying device; A fabric feeding mechanism for conveying fabric, the fabric feeding mechanism including a guide plate for guiding the fabric into a U-shape, the guide plate being disposed around the narrow end; and A longitudinal welding assembly, positioned above the narrow end and downstream of the guide plate, is used for longitudinally welding the upper opening of the U-shaped fabric; The transverse welding assembly is located downstream of the spring conveying device.

10. The bagged spring string production equipment according to claim 9, characterized in that: The spring transfer device includes a guide assembly and a closed-loop conveying mechanism. The guide assembly guides at least a portion of the conveying mechanism, causing at least a portion of the conveying mechanism to form an inwardly curved and recessed conveying area. The guide assembly is disposed on the recessed side of the conveying area.

11. The bagged spring string production equipment according to claim 10, characterized in that: The conveying mechanism is a chain, and the guiding assembly includes at least one guide member, which is at least one of a plate, a roller, and a sprocket.

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