Ultrasonic welding mechanism and pocket spring production device

Abstract

The invention discloses an ultrasonic welding mechanism and a pocket spring production device, wherein the ultrasonic welding mechanism comprises a first die head and a second die head, and the welding and cutting of cloth are realized through the cooperation of the first die head and the second die head, wherein the second die head comprises a second welding part and a cutting part, the second welding part and the cutting part are in contact with the first welding part of the first die head, and the second die head is rotatable, and as the cloth is conveyed forward, the second welding part continuously rotates to weld the cloth, compared with the existing structure that requires two die heads to rise and fall to cooperate for each welding, the welding efficiency can be improved, and at the same time, the cutting part and the second welding part are arranged in parallel, and the cutting part rotates to cut off excess edge material, so that the cloth welding and cutting can be realized at the same time, and the production process is simplified. This invention is used in the field of ultrasonic welding technology.

Description

Technical Field

[0001] The invention relates to the technical field of ultrasonic welding, in particular to an ultrasonic welding mechanism and a pocket spring production device. Background Art

[0002] Ultrasonic welding uses high-frequency vibration waves to transmit to the surfaces of two objects to be welded. Under pressure, the two surfaces of the objects rub against each other to form a fusion between the molecular layers.

[0003] Ultrasonic welding is widely used in the furniture industry. Ultrasonic technology is used for both cloth and plastic. In the field of pocket springs, ultrasound is generally used for cloth welding. The upper and lower die heads cooperate with each other. The two die heads can be lifted and moved. Each welding requires the two die heads to be lifted and moved once. This limits production efficiency to a certain extent. In addition, there will be excess cloth that needs to be cut after ultrasonic welding. The existing process is to install a cutter after ultrasonic welding, and remove the excess material by cutting with the cutter. The process is cumbersome. Summary of the invention

[0004] The purpose of the present invention is to solve at least one of the technical problems existing in the prior art and to provide an ultrasonic welding mechanism that simultaneously welds and cuts fabric in a rotating manner, thereby improving production efficiency and simplifying the production process.

[0005] The present invention also provides a bagged spring production device, comprising the above-mentioned ultrasonic welding mechanism.

[0006] According to a first aspect of an embodiment of the present invention, there is provided an ultrasonic welding mechanism, comprising a first die head and a second die head, wherein the first die head has a first welding portion, and the second die head comprises a second welding portion and a cutting portion, wherein the second welding portion and the cutting portion are arranged in parallel, and the second welding portion and the cutting portion are respectively abutted against the first welding portion, and the second die head can rotate to drive the second welding portion to rotate and weld fabric, and drive the cutting portion to rotate and cut fabric.

[0007] The above-mentioned ultrasonic welding mechanism has at least the following beneficial effects: the welding and cutting of the cloth are realized by the cooperation of the first die head and the second die head, wherein the second die head includes a second welding part and a cutting part, the second welding part and the cutting part are in contact with the first welding part of the first die head, and the second die head is rotatable, and as the cloth is conveyed forward, the second welding part continuously rotates to weld the cloth, which can improve the welding efficiency compared with the existing structure that requires the lifting and lowering cooperation of two die heads for each welding. At the same time, the cutting part and the second welding part are arranged in parallel, and the cutting part rotates to cut off excess cloth, so that the cloth welding and cutting can be realized at the same time, simplifying the production process.

[0008] According to the ultrasonic welding mechanism described in the embodiment of the first aspect of the present invention, the ultrasonic welding mechanism includes a first driving component, and the first driving component is used to drive the first die head and / or the second die head to move, so that the second die head is separated from or close to the first die head, wherein the second die head is separated from the first die head to form a space for placing cloth or cleaning the cut cloth.

[0009] According to the ultrasonic welding mechanism described in the embodiment of the first aspect of the present invention, the first driving component is used to drive the second die head to move so that the second die head is separated from or close to the first die head. The ultrasonic welding mechanism includes a frame and a second driving component. The second driving component is used to drive the second die head to rotate. The second driving component is fixed to the frame. The output end of the second driving component is connected to a universal coupling. A telescopic part is connected between the universal coupling and the second die head, and the telescopic part can be extended and retracted as the second die head moves.

[0010] According to the ultrasonic welding mechanism described in the embodiment of the first aspect of the present invention, the second die head also includes a rotating shaft, which is fixedly connected to the second welding part and / or the cutting part respectively, and the rotation of the rotating shaft can directly drive the second welding part and / or the cutting part to rotate.

[0011] According to the ultrasonic welding mechanism described in the embodiment of the first aspect of the present invention, the second die head also includes a rotating shaft and at least one first one-way bearing, and the first one-way bearing is arranged between the second welding part and the rotating shaft and / or between the cutting part and the rotating shaft, and the rotating shaft drives the second welding part and / or the cutting part to rotate through the first one-way bearing.

[0012] According to the ultrasonic welding mechanism described in the embodiment of the first aspect of the present invention, there are two first one-way bearings, one of the first one-way bearings is arranged between the second welding part and the rotating shaft, and the other first one-way bearing is arranged between the cutting part and the rotating shaft.

[0013] According to the ultrasonic welding mechanism described in the embodiment of the first aspect of the present invention, the second welding part and the cutting part are fixedly connected, and the first one-way bearing is arranged between the second welding part and the rotating shaft or between the cutting part and the rotating shaft.

[0014] According to the ultrasonic welding mechanism described in the embodiment of the first aspect of the present invention, the second die head also includes a second one-way bearing and a sleeve, the second one-way bearing is arranged between the sleeve and the rotating shaft, the second welding part is fixedly connected to the rotating shaft, and the first one-way bearing is arranged between the cutting part and the rotating shaft.

[0015] According to the ultrasonic welding mechanism described in the embodiment of the first aspect of the present invention, the first die head is rotatable, the rotation axes of the first die head and the second die head are perpendicular to each other, the second die head rotates synchronously with the first die head, and the second welding part and the cutting part of the second die head are in eccentric contact with the abutment of the first welding part.

[0016] According to the ultrasonic welding mechanism described in the embodiment of the first aspect of the present invention, the ultrasonic welding mechanism also includes a second drive component and a third drive component, the third drive component is used to drive the first die head to rotate, and the second drive component is used to drive the second die head to rotate synchronously with the first die head.

[0017] According to the ultrasonic welding mechanism described in the embodiment of the first aspect of the present invention, the ultrasonic welding mechanism also includes a second driving assembly, the second driving assembly includes a driving member, a transmission shaft and a bevel gear transmission assembly, the driving member is used to drive the transmission shaft to rotate, the transmission shaft is transmission-connected to the second die head to drive the second die head to rotate; the transmission shaft is transmission-connected to the bevel gear transmission assembly, and the bevel gear transmission assembly is transmission-connected to the first die head to drive the first die head to rotate synchronously relative to the second die head.

[0018] According to the ultrasonic welding mechanism described in the embodiment of the first aspect of the present invention, the bottom of the first welding part is a circular plane or an annular plane, the second welding part includes a plurality of first teeth in an annular array, and the first teeth and the cutting part are both in contact with the bottom plane of the first welding part.

[0019] According to the ultrasonic welding mechanism described in the embodiment of the first aspect of the present invention, the second die head also includes a discharge part, the second welding part, the cutting part and the discharge part are arranged in sequence, and the discharge part is used to cooperate with the first welding part to clamp the cut cloth, and rotate to drive the cut cloth to be discharged along a predetermined direction.

[0020] According to the ultrasonic welding mechanism described in the embodiment of the first aspect of the present invention, the discharge part includes a plurality of second teeth in a circular array, and the second teeth are parallel to the rotation axis of the second die head, or the second teeth form a non-zero angle with the rotation axis of the second die head.

[0021] According to the ultrasonic welding mechanism described in the embodiment of the first aspect of the present invention, the ultrasonic welding mechanism includes a guide wheel assembly, the guide wheel assembly is arranged at the feed end of the first die head and the second die head, the guide wheel assembly includes two guide wheels abutting each other, and the two guide wheels are used for pressing the cloth.

[0022] According to a second aspect of the present invention, there is provided a pocket spring production device, comprising a power device and the ultrasonic welding mechanism, wherein the power device is used to pull the cloth and make the linear velocity direction of the cloth at the contact point with the first die head and the second die head the same. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention is further described below in conjunction with the accompanying drawings and embodiments;

[0024] Figure 1 is a schematic structural diagram of an ultrasonic welding mechanism according to an embodiment of the present invention, wherein the second driving member is connected to the second die head via a universal coupling and a telescopic member;

[0025] Figure 2 is a schematic structural diagram of an ultrasonic welding mechanism according to another embodiment of the present invention, wherein the first die head and the second die head are driven by two driving assemblies;

[0026] Figure 3 is a structural schematic diagram of an ultrasonic welding mechanism according to another embodiment of the present invention, wherein the first die head and the second die head are driven by a single driving assembly;

[0027] Figure 4 It is a schematic diagram of the planar structure of welding fabric by an ultrasonic welding mechanism according to an embodiment of the present invention;

[0028] Figure 5 is a schematic cross-sectional structural diagram of a second die head according to a second embodiment of the present invention;

[0029] Figure 6 is a schematic cross-sectional structural diagram of the second die head of the third embodiment of the present invention;

[0030] Figure 7 is a schematic cross-sectional structural diagram of the second die head of the fourth embodiment of the present invention;

[0031] Figure 8 is a schematic cross-sectional structural diagram of the second die head of the fifth embodiment of the present invention;

[0032] Fig. 9 is a schematic cross-sectional structural diagram of the second die head of the sixth embodiment of the present invention;

[0033] Fig.10 is a structural schematic diagram of the ultrasonic welding mechanism of an embodiment of the present invention from another perspective;

[0034] Fig.11 It is a schematic diagram of the structure of the first die head and the second die head according to an embodiment of the present invention;

[0035] Fig.12 is a schematic structural diagram of a first die head and a second die head in another embodiment of the present invention;

[0036] Figure numerals: first die head 100, first welding part 110, second die head 200, second welding part 210, cutter part 220, discharge part 230, rotating shaft 240, first one-way bearing 250, connecting sleeve 260, second one-way bearing 270, sleeve 280, first drive assembly 300, second drive assembly 400, first motor 410, universal joint 420, telescopic part 430, fixed end 431, telescopic end 432, transmission shaft 440, bevel gear transmission assembly 450, third drive assembly 500, second motor 510, belt assembly 520, frame 600, guide wheel 700, guide beam 800. DETAILED DESCRIPTION

[0037] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0038] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0039] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0040] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific content of the technical solution.

[0041] Reference Figures 1 to 12The embodiment of the present invention provides an ultrasonic welding mechanism, including a first die head 100 and a second die head 200, wherein the first die head 100 releases high-frequency vibration waves, the first die head 100 has a first welding portion 110, the second die head 200 includes a second welding portion 210 and a cutter portion 220, the second welding portion 210 and the cutter portion 220 are arranged in parallel, the second welding portion 210 and the cutter portion 220 are respectively in contact with the first welding portion 110, and the second die head 200 can rotate to drive the second welding portion 210 to rotate and weld the fabric, and drive the cutter portion 220 to rotate and cut the fabric. Specifically, the bottom of the first welding portion 110 is a plane, the second welding portion 210 includes a plurality of first teeth in an annular array, and the cutter portion 220 is arranged in an annular shape.

[0042] The fabric is folded in half and wrapped around the guide beam 800 of the pocket spring production device. An opening is formed on the side of the fabric close to the ultrasonic welding mechanism. The fabric is welded and sealed by the ultrasonic welding mechanism. The fabric is transported in the front-to-back direction. The overlapping part of the fabric opening is placed between the first die 100 and the second die 200. The first tooth on the second welding part 210 abuts against the bottom of the first welding part 110, and a welding point is formed on the fabric.

[0043] The ultrasonic welding mechanism of this embodiment realizes the welding and cutting of the cloth through the cooperation of the first die head 100 and the second die head 200, wherein the second die head 200 includes a second welding part 210 and a cutter part 220, and the second die head 200 is rotatable. As the cloth is conveyed forward, the second welding part 210 continuously rotates to weld the cloth, which can improve the welding efficiency compared with the existing structure that requires the lifting and lowering cooperation of two die heads for each welding. At the same time, the cutter part 220 is arranged in parallel with the second welding part 210, and the cutter part 220 rotates to cut off the excess edge material, so that the cloth welding and cutting can be carried out simultaneously, simplifying the production process.

[0044] In this embodiment, the ultrasonic welding mechanism includes a first driving assembly 300, which can drive the second die head 200 to move up and down, so that the second die head 200 is separated from or close to the first die head 100, wherein the second die head 200 is separated from the first die head 100 to form a space for placing the cloth or cleaning the cut cloth. Specifically, the first driving assembly 300 uses a cylinder. Before the welding work starts, the first driving assembly 300 drives the second die head 200 to descend, so that the second die head 200 is separated from the first die head 100, and the overlapping part of the cloth opening is placed between the first die head 100 and the second die head 200; when the work starts, the first driving assembly 300 drives the second die head 200 to rise, so that the second die head 200 abuts against the first die head 100 to clamp the cloth; after all welding is completed, the first driving assembly 300 drives the second die head 200 to descend and clean the cut cloth.

[0045] In some embodiments, the ultrasonic welding mechanism includes a frame 600 and a second drive assembly 400, the second drive assembly 400 drives the second die head 200 to rotate, the second drive assembly 400 is fixed on the frame 600, the output end of the second drive assembly 400 is connected to a universal coupling 420, a telescopic member 430 is connected between the universal coupling 420 and the second die head 200, and the telescopic member 430 can be extended and retracted as the second die head 200 moves. Specifically, the second drive assembly 400 includes a first motor 410, the telescopic member 430 includes a fixed end 431 and a telescopic end 432, the telescopic end 432 can slide and retract relative to the fixed end 431, the output shaft of the first motor 410 is connected to one end of the universal coupling 420, the other end of the universal coupling 420 is connected to the fixed end 431 of the telescopic member 430, and the telescopic end 432 of the telescopic member 430 is connected to the second die head 200.

[0046] It is understandable that a universal coupling 420 may be additionally provided between the telescopic end 432 of the telescopic member 430 and the second die head 200 as required.

[0047] Since the second driving assembly 400 is fixedly mounted on the frame 600, when the first driving assembly 300 drives the second die head 200 to move up and down, the second die head 200 is displaced in the vertical direction, so that the position of the second die head 200 relative to the second driving assembly 400 changes. By setting the universal coupling 420 and the telescopic part 430, the second die head 200 and the second driving assembly 400 remain connected (indirect connection) while the second die head 200 moves up and down.

[0048] It is understood that, as an alternative, in some embodiments, reference Figure 3 and Figure 4 The second drive assembly 400 and the second die head 200 can be fixed as a whole on the output end of the first drive assembly 300, that is, the first drive assembly 300 drives the second drive assembly 400 and the second die head 200 to move up and down as a whole. In this way, there is no need to set a universal coupling 420 and a telescopic member 430 between the second drive assembly 400 and the second die head 200.

[0049] It is understandable that, in addition to the air cylinder, the first drive assembly 300 may also use a drive device or drive mechanism such as a hydraulic cylinder, an electric cylinder, a screw nut transmission mechanism, etc., as long as it can drive the second die head 200 to separate from or approach the first die head 100.

[0050] It is understandable that, as an alternative, the first drive assembly 300 can be configured to drive the first die 100 to move up and down, or to drive the first die 100 and the second die 200 to move toward or in the opposite direction, which can also achieve the separation or approach of the second die 200 to the first die 100.

[0051] Reference Figures 5 to 8 In some embodiments, the second die head 200 also includes a rotating shaft 240 and at least one first one-way bearing 250. The first one-way bearing 250 is arranged between the second welding part 210 and the rotating shaft 240 and / or between the cutting part 220 and the rotating shaft 240. The rotating shaft 240 drives the second welding part 210 and / or the cutting part 220 to rotate through the first one-way bearing 250.

[0052] Reference Figure 5 As one of the embodiments, the telescopic member 430 is connected to the rotating shaft 240, and there are two first one-way bearings 250. One of the first one-way bearings 250 is arranged between the second welding part 210 and the rotating shaft 240, and the other first one-way bearing 250 is arranged between the cutting part 220 and the rotating shaft 240, that is, the rotating shaft 240 drives the second welding part 210 and the cutting part 220 to rotate through the first one-way bearings 250 respectively, and the same side of the second welding part 210 and the cutting part 220 is concave to form a concave cavity for accommodating the first one-way bearing 250.

[0053] Reference Figure 6 As one of the embodiments, the second welding part 210 and the cutter part 220 are fixedly connected, and a first one-way bearing 250 is arranged between the second welding part 210 and the rotating shaft 240 or between the cutter part 220 and the rotating shaft 240, that is, the second welding part 210 and the cutter part 220 are driven to rotate by a first one-way bearing 250. It can be understood that the second welding part 210 and the cutter part 220 are fixedly connected, and the second welding part 210 and the cutter part 220 can be an integrated structure, or the two can be made separately and fixedly connected by bolts and other connecting parts.

[0054] Reference Figure 7 and Figure 8 As one of the embodiments, the second die head 200 further includes a second one-way bearing 270 and a sleeve 280. The second one-way bearing 270 is arranged between the sleeve 280 and the rotating shaft 240, that is, the sleeve 280 drives the rotating shaft 240 to rotate through the second one-way bearing 270. The second welding part 210 is fixedly connected to the rotating shaft 240. The first one-way bearing 250 is arranged between the cutting part 220 and the rotating shaft 240, that is, the rotating shaft 240 drives the cutting part 220 to rotate through the first one-way bearing 250. It can be understood that the second welding part 210 is fixedly connected to the rotating shaft 240, and the second welding part 210 and the rotating shaft 240 can be an integrated structure, refer to Figure 7 ; or the two are connected by interference fit, refer to Figure 8 .

[0055] When the second driving assembly 400 stops driving, the second die head 200 stops rotating as the power of the second driving assembly 400 disappears, and the rotating shaft 240 stops moving. However, the cloth covering the guide beam 800 will continue to move forward under the action of inertia, which can easily cause cloth wrinkles. The second welding part 210 and the cutting part 220 are driven to rotate by the one-way bearing. Driven by the cloth, the second welding part 210 and the cutting part 220 can rotate a certain angle to avoid causing cloth accumulation and wrinkles. Although the rotating shaft 240 stops moving, the second welding part 210 and the cutting part 220 can rotate unidirectionally relative to the rotating shaft 240. Wrinkled cloth affects the appearance, and the quality of welding is reduced because the cloth becomes thicker after wrinkling.

[0056] Reference Fig. 9 In some other embodiments, the rotating shaft 240 is fixedly connected to the second welding part 210 and / or the cutting part 220 respectively, and the rotation of the rotating shaft 240 directly drives the second welding part 210 and / or the cutting part 220 to rotate, which easily causes wrinkles in the fabric. The rotating shaft 240 is fixedly connected to the second welding part 210 and / or the cutting part 220 respectively, and the rotating shaft 240, the second welding part 210 and the cutting part 220 may be an integrated structure; or the second welding part 210 and the cutting part 220 may be an integrated structure and connected to the rotating shaft 240 by interference fit; or the three may be manufactured separately and fixedly connected by a connector.

[0057] In some embodiments, the first die 100 is configured to be rotatable, and the rotation axes 240 of the first die 100 and the second die 200 are perpendicular to each other, wherein the first die 100 rotates around the Y-axis, and the second die 200 rotates around the X-axis, and the second die 200 rotates synchronously with the first die 100, so that the same friction is maintained between the second die 200 and the fabric, and between the first die 100 and the fabric.

[0058] The bottom of the first welding part 110 is a circular plane or an annular plane, and the first teeth of the annular array and the cutter part 220 on the second welding part 210 are both in contact with the bottom plane of the first welding part 110. Here, the contact surface between the second welding part 210 and the cutter part 220 of the second die head 200 and the bottom surface of the first welding part 110 of the first die head 100 is defined as a working surface, and the overlapping opening of the fabric passes through the working surface, and the working surface is located on one side of the bottom surface of the first welding part 110, that is, when the first die head 100 and the second die head 200 rotate, the contact between the second welding part 210 and the cutter part 220 and the bottom surface of the first welding part 110 is eccentric contact, that is, the contact position between the second welding part 210 and the cutter part 220 of the second die head 200 and the first welding part 110 deviates from the rotation axis of the first die head 100 by a certain distance.

[0059] Reference Figure 1 and Figure 2In some embodiments, the first die 100 and the second die 200 are driven by their own driving components respectively, the ultrasonic welding mechanism includes a third driving component 500, the third driving component 500 drives the first die 100 to rotate, the third driving component 500 includes a second motor 510, the second motor 510 drives the first die 100 to rotate through a belt component 520, and the second driving component 400 drives the second die 200 to rotate synchronously with the first die 100.

[0060] Reference Figure 3 In some other embodiments, the first die head 100 and the second die head 200 are driven by the same driving assembly (second driving assembly 400). The second driving assembly 400 includes a driving member (not shown), a transmission shaft 440 and a bevel gear transmission assembly 450. The driving member can be a motor. The driving member drives the transmission shaft 440 to rotate. The transmission shaft 440 is in driving connection with the second die head 200 to drive the second die head 200 to rotate; the transmission shaft 440 is in driving connection with the bevel gear transmission assembly 450. The bevel gear transmission assembly 450 is in driving connection with the first die head 100 through the belt assembly 520, driving the first die head 100 to rotate synchronously with the second die head 200.

[0061] It is understandable that, as an alternative, the first die 100 and the second die 200 can be set to rotate with the die, that is, not driven by a driving assembly, there is a certain friction between the cloth and the first die 100 and the second die 200, and the first die 100 and the second die 200 are driven to rotate by the conveying of the cloth, and the rotation welding and cutting of the second die 200 can also be achieved.

[0062] Reference Fig.11 and Fig.12 In some embodiments, the second die head 200 further includes a discharge portion 230, and the second welding portion 210, the cutter portion 220 and the discharge portion 230 are arranged in sequence. The discharge portion 230 cooperates with the first welding portion 110 to clamp the cut cloth, and rotates to drive the cut cloth to be discharged in a predetermined direction, so as to prevent the cut cloth from falling into the equipment or being entangled on other parts, thereby preventing the normal operation of the equipment from being affected. In this way, the rotation of the second die head 200 can simultaneously realize the welding, cutting and discharge of the cloth, improve production efficiency, and simplify the process flow. Specifically, the discharge portion 230 includes a plurality of second teeth in an annular array, and the second teeth cooperate with the bottom of the first welding portion 110 to clamp the cloth. The use of an annular tooth structure can increase the friction between the discharge portion 230 and the cloth.

[0063] Reference Fig.11 In some embodiments, the second teeth are parallel to the rotation axis 240 of the second die head 200 .

[0064] Reference Fig.12In some other embodiments, the second teeth and the rotation axis 240 of the second die head 200 form a non-zero angle, so that the cut cloth is discharged at an angle, thereby improving the discharge effect.

[0065] Of course, it is understandable that in addition to the above-mentioned structure of multiple second teeth in a circular array, the discharge portion 230 can also adopt other structures, such as an annular grinding wheel. As long as there is a certain friction between the discharge portion 230 and the cloth, it can cooperate with the bottom of the first welding portion 110 to drive the cut cloth to be discharged.

[0066] Reference Fig.10 In some embodiments, the ultrasonic welding mechanism includes a guide wheel assembly, which is arranged at the feeding end of the first die 100 and the second die 200 (the rear side of the first die 100 and the second die 200 in the figure), and the guide wheel assembly includes two guide wheels 700 arranged in abutment, and the cloth is pressed between the two guide wheels 700. When the cloth enters the working surface, if the opening angle at the overlapping part of the cloth is too large, it will affect the welding effect, and the welding effect can be improved by pressing and guiding the cloth into the working surface through the guide wheel assembly.

[0067] The embodiment of the present invention further provides a pocket spring production device, comprising a power device and the above-mentioned ultrasonic welding mechanism, wherein the power device pulls the fabric and makes the fabric have the same linear velocity direction at the abutment point with the first die head 100 and the second die head 200. The pocket spring production device including the above-mentioned ultrasonic welding mechanism welds the fabric in a rotating manner and cuts the excess fabric at the same time, and a discharge part 230 can be provided on the second die head 200 to discharge the fabric, thereby realizing the integration of welding, cutting and discharge, and simplifying the production process.

[0068] Of course, it is understandable that the above-mentioned ultrasonic welding mechanism is not limited to being used for fabric welding of pocket spring production devices, but can also be used for welding other fabrics, such as mask fabrics, etc.

[0069] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. An ultrasonic welding mechanism, characterized in that: The invention comprises a first die head and a second die head, wherein the first die head has a first welding part, and the second die head comprises a second welding part and a cutting part, wherein the second welding part and the cutting part are arranged in parallel, and the second welding part and the cutting part are respectively in contact with the first welding part, and the second die head can rotate to drive the second welding part to rotate and weld the fabric, and drive the cutting part to rotate and cut the fabric; The ultrasonic welding mechanism comprises a first driving assembly, the first driving assembly is used to drive the first die head and / or the second die head to move, so that the second die head is separated from or close to the first die head, wherein the second die head is separated from the first die head to form a space for placing cloth or cleaning the cut cloth; The first driving assembly is used to drive the second die head to move, so that the second die head is separated from or close to the first die head, and the ultrasonic welding mechanism includes a frame and a second driving assembly, the second driving assembly is used to drive the second die head to rotate, and the second driving assembly is fixed to the frame; The second die head further comprises a rotating shaft, which is respectively fixedly connected to the second welding part and / or the cutting part. The rotation of the rotating shaft can directly drive the second welding part and / or the cutting part to rotate.

2. The ultrasonic welding mechanism according to claim 1, characterized in that: The output end of the second driving assembly is connected with a universal coupling, and a telescopic member is connected between the universal coupling and the second die head, and the telescopic member can be telescoped along with the movement of the second die head.

3. The ultrasonic welding mechanism according to claim 1, characterized in that: The second die head also includes a rotating shaft and at least one first one-way bearing. The first one-way bearing is arranged between the second welding part and the rotating shaft and / or between the cutting part and the rotating shaft. The rotating shaft drives the second welding part and / or the cutting part to rotate through the first one-way bearing.

4. The ultrasonic welding mechanism according to claim 3, characterized in that: There are two first one-way bearings, one of which is arranged between the second welding portion and the rotating shaft, and the other is arranged between the cutting portion and the rotating shaft.

5. The ultrasonic welding mechanism according to claim 3, characterized in that: The second welding portion is fixedly connected to the cutting portion, and the first one-way bearing is arranged between the second welding portion and the rotating shaft or between the cutting portion and the rotating shaft.

6. The ultrasonic welding mechanism according to claim 3, characterized in that: The second die head also includes a second one-way bearing and a sleeve, the second one-way bearing is arranged between the sleeve and the rotating shaft, the second welding portion is fixedly connected to the rotating shaft, and the first one-way bearing is arranged between the cutting portion and the rotating shaft.

7. The ultrasonic welding mechanism according to claim 1, characterized in that: The first die head is rotatable, the rotation axes of the first die head and the second die head are perpendicular to each other, the second die head rotates synchronously with the first die head, and the second welding part and the cutting part of the second die head are in eccentric contact with the abutment of the first welding part.

8. The ultrasonic welding mechanism according to claim 7, characterized in that: The ultrasonic welding mechanism further includes a second driving assembly and a third driving assembly, wherein the third driving assembly is used to drive the first die head to rotate, and the second driving assembly is used to drive the second die head to rotate synchronously with respect to the first die head.

9. The ultrasonic welding mechanism according to claim 7, characterized in that: The ultrasonic welding mechanism also includes a second driving assembly, which includes a driving member, a transmission shaft and a bevel gear transmission assembly. The driving member is used to drive the transmission shaft to rotate, and the transmission shaft is transmission-connected to the second die head to drive the second die head to rotate; the transmission shaft is transmission-connected to the bevel gear transmission assembly, and the bevel gear transmission assembly is transmission-connected to the first die head to drive the first die head to rotate synchronously relative to the second die head.

10. The ultrasonic welding mechanism according to claim 1, characterized in that: The bottom of the first welding portion is a circular plane or an annular plane, the second welding portion includes a plurality of first teeth in an annular array, and the first teeth and the cutter portion are both in contact with the bottom plane of the first welding portion.

11. The ultrasonic welding mechanism according to any one of claims 1 to 10, characterized in that: The second die head also includes a discharge part, and the second welding part, the cutting part and the discharge part are arranged in sequence. The discharge part is used to cooperate with the first welding part to clamp the cut cloth, and rotate to drive the cut cloth to be discharged along a predetermined direction.

12. The ultrasonic welding mechanism according to claim 11, characterized in that: The discharge portion includes a plurality of second teeth in an annular array, wherein the second teeth are parallel to a rotation axis of the second die head, or the second teeth form a non-zero angle with the rotation axis of the second die head.

13. The ultrasonic welding mechanism according to claim 1, characterized in that: The ultrasonic welding mechanism comprises a guide wheel assembly, the guide wheel assembly is arranged at the feeding end of the first die head and the second die head, the guide wheel assembly comprises two guide wheels arranged in abutment with each other, and the two guide wheels are used for pressing the cloth.

14. A pocket spring production device, characterized in that: It comprises a power device and the ultrasonic welding mechanism according to any one of claims 1 to 13, wherein the power device is used to pull the cloth and make the linear velocity direction of the cloth at the abutment point with the first die head and the second die head be the same.

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