Spring coiling device

Abstract

The spring coiling device comprises a wire feeding mechanism, a forming wheel and a guiding piece, the wire feeding mechanism comprises a first wire pressing wheel set and a second wire pressing wheel set which are distributed in the first direction, and wire inlet channels are formed in the first wire pressing wheel set and the second wire pressing wheel set correspondingly; the forming wheel is rotationally arranged at the output end of the wire feeding mechanism, a wire guide groove is formed in the periphery of the forming wheel, the wire feeding mechanism is used for clamping and conveying a steel wire to the wire guide groove, the forming wheel can enable the steel wire to be spirally wound to form a spring, and the guiding piece is arranged between the wire feeding mechanism and the forming wheel and provided with two conveying channels. Inlets of the two conveying channels are distributed in the first direction and correspond to outlets of the two wire inlet channels in a one-to-one mode, and outlets of the two conveying channels correspond to different positions of the wire groove respectively. The guiding piece comprises a body part and a hole cutter, the hole cutter is detachably installed at the downstream end of the guiding piece in the conveying direction of the steel wire, the conveying channel penetrates through the body part and the hole cutter, and two channels in the hole cutter are coplanar and are arranged in parallel.

Description

Technical Field

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

[0002] A spring coiling device is used to spirally wind steel wire to form a spring. Typically, the spring coiling device uses a wire feeding mechanism to feed the steel wire at a certain speed to a forming wheel, where it is coiled to form a spring. A guide is usually provided between the wire feeding mechanism and the forming wheel. The inlet of the guide corresponds to the position where the wire is output from the wire feeding mechanism, and the outlet corresponds to the groove of the forming wheel. Depending on the relative positions of the wire feeding mechanism and the groove of the forming wheel, the distribution of the conveying channels in the guide varies.

[0003] In related technologies, the conveying channel is distributed in the guide in a straight segment. The steel wire passes through the conveying channel at a high speed and is fed into the groove of the forming wheel, thereby being coiled into a spring and cut off at the exit of the guide. Therefore, the inner wall of the conveying channel and at the exit of the conveying channel are prone to wear, which leads to the guide needing to be replaced regularly, resulting in a large maintenance cost. Utility Model Content

[0004] To solve at least one of the above-mentioned technical problems, this application provides a coil spring device that can improve the service life of the guide and reduce maintenance costs. The technical solution adopted is as follows.

[0005] The coiling spring device provided in this application includes a wire feeding mechanism, a forming wheel, and a guide member. The wire feeding mechanism includes a first pressure wheel group and a second pressure wheel group distributed along a first direction, with wire inlet channels formed in the first and second pressure wheel groups, respectively. The forming wheel is rotatably disposed at the output end of the wire feeding mechanism, and a wire groove is provided on the outer periphery of the forming wheel. The wire feeding mechanism is used to clamp and feed the steel wire to the wire groove. The forming wheel can cause the steel wire to spirally coil to form a spring. The guide member is disposed between the wire feeding mechanism and the forming wheel. The guide member has two conveying channels, with the inlets of the two conveying channels distributed along the first direction and corresponding one-to-one with the outlets of the two wire inlet channels. The outlets of the two conveying channels correspond to different positions in the wire groove, respectively. The guide member includes a body and a cutting tool. The cutting tool is detachably installed at the downstream end of the guide member along the wire conveying direction. The conveying channels pass through the body and the cutting tool, and the two channels in the cutting tool are coplanar and parallel to each other.

[0006] In some embodiments of this application, the cutting tool is provided with a set of main channels, and the body part is provided with a set of body channels. The main channels and the body channels are connected in a one-to-one correspondence to form the conveying channel. The cutting tool is also provided with a set of spare channels. The main channels and the spare channels are not connected to each other. The installation position between the cutting tool and the body part is adjustable. When the cutting tool is installed in different positions on the body part, the body channels can be connected to either the main channels or the spare channels to form the conveying channel.

[0007] In some embodiments of this application, the main channel and the backup channel are arranged in parallel, and the entrance ends of the main channel and the backup channel are respectively located at opposite ends of the hole cutter.

[0008] In some embodiments of this application, the aperture of the body channel is adapted to the diameter of the inserted steel wire, and the aperture of the main channel is greater than or equal to the aperture of the body channel.

[0009] In some embodiments of this application, the hole cutter is configured as a cemented carbide steel structure, and the hardness of the hole cutter is greater than the hardness of the body.

[0010] In some embodiments of this application, a wire sleeve is provided in the conveying channel of the main body, and the wire sleeve is configured as a hard alloy steel structure.

[0011] In some embodiments of this application, the body portion includes a first portion and a second portion spaced apart, the gap between the first portion and the second portion forming a drain outlet, and the conveying channel passing through the first portion and the second portion; or

[0012] The main body and the cutting tool are spaced apart along the wire conveying direction, and the gap between the main body and the cutting tool forms a drain outlet.

[0013] In some embodiments of this application, the first pressure roller group includes a first upper pressure roller and a first lower pressure roller arranged in pairs along a second direction. The first upper pressure roller and the first lower pressure roller rotate synchronously to clamp a steel wire and transport it along a third direction. The second pressure roller group includes a second upper pressure roller and a second lower pressure roller arranged in pairs along the second direction. The second upper pressure roller and the second lower pressure roller rotate synchronously to clamp another steel wire and transport it along a third direction. The first upper pressure roller and the second lower pressure roller are coaxially arranged, and the rotation axes of the first upper pressure roller and the first lower pressure roller are parallel.

[0014] In some embodiments of this application, the shaft of the second upper pressing wheel is sleeved on the outer periphery of the shaft of the first upper pressing wheel, and there is a movable gap between the shaft of the first upper pressing wheel and the shaft of the second upper pressing wheel; the shaft of the second lower pressing wheel is sleeved on the outer periphery of the shaft of the first lower pressing wheel, and there is a movable gap between the shaft of the second lower pressing wheel and the shaft of the first lower pressing wheel.

[0015] The wire feeding mechanism further includes a clamping component, which clamps either the first upper pressure roller or the second upper pressure roller so that one of the first pressure roller group or the second pressure roller group moves closer to each other to clamp the wire being fed.

[0016] In some embodiments of this application, the clamping assembly includes a first clamping drive member and a second clamping drive member distributed along a first direction. The first clamping drive member drives the first upper pressure roller to press against the first lower pressure roller, and the second clamping drive member drives the second upper pressure roller to press against the second lower pressure roller.

[0017] In some embodiments of this application, the clamping assembly further includes a first elastic element and a second elastic element. The first clamping drive and the first upper pressing wheel are elastically connected through the first elastic element, and the second clamping drive and the second upper pressing wheel are elastically connected through the second elastic element. The first elastic element is used to provide an elastic force to the first upper pressing wheel away from the first lower pressing wheel, and the second elastic element is used to provide an elastic force to the second upper pressing wheel away from the second lower pressing wheel.

[0018] In some embodiments of this application, at least one of the first upper pressing wheel and the first lower pressing wheel has a wire-passing groove on its outer peripheral side, and at least one of the second upper pressing wheel and the second lower pressing wheel has a wire-passing groove on its outer peripheral side. The wire-passing groove is used for steel wire to pass through, and the cross-sectional shape of the wire-passing groove includes a triangle or an arc.

[0019] In some embodiments of this application, the forming wheel moves in a plane perpendicular to the axis to change the distance between the wire groove and the outlet of the conveying channel, thereby changing the waist diameter of the spring.

[0020] In some embodiments of this application, the axis of the forming wheel is arranged along a first direction, and the two outlets of the conveying channel of the guide are respectively arranged along a second direction.

[0021] In some embodiments of this application, the axis of the forming wheel is perpendicular to the rotation axis of the first and second pressing wheel groups, and the two outlets of the conveying channel of the guide are distributed along a first direction.

[0022] In some embodiments of this application, the coil spring device further includes a frame, a swing arm, a connecting rod, and a third driving member. The forming wheel is disposed on the swing arm, one end of the swing arm is fulcrum disposed on the frame, and the other end is connected to the connecting rod. The third driving member drives the swing arm to drive the forming wheel closer to or away from the outlet of the conveying channel.

[0023] In some embodiments of this application, the coil spring device further includes a push pin disposed at the downstream end of the forming wheel along the wire feeding direction. The push pin is axially movable parallel to the forming wheel and is used to push the wire during the wire winding process to change the spring pitch.

[0024] In some embodiments of this application, the coil spring device further includes a shearing mechanism, which includes a cutter and a fourth drive member. The cutter is disposed at the outlet of the guide member, and the fourth drive member drives the cutter to move or swing to cut the wire.

[0025] The embodiments of this application have at least the following beneficial effects:

[0026] By setting the guide component into two parts, the main body and the cutting tool, and making the cutting tool detachable and replaceable from the main body, the cutting tool can be installed at the outlet of the conveying channel where wear is likely to occur. When the conveying channel in the cutting tool becomes severely worn, only the cutting tool needs to be replaced, thus avoiding the need to replace the entire guide component and reducing the maintenance cost of the guide component. Attached Figure Description

[0027] The present application will be further illustrated below with reference to the accompanying drawings and embodiments. It should be noted that the embodiments illustrated in the following drawings are exemplary and are only used to explain the present application, and should not be construed as limiting the present application.

[0028] Figure 1 A schematic diagram of the structure of the coil spring device provided in an embodiment of this application from one perspective;

[0029] Figure 2 A schematic diagram of the structure of the guide member of the coil spring device provided in the embodiments of this application;

[0030] Figure 3 An exploded view of the guide member of the coil spring device provided in the embodiments of this application;

[0031] Figure 4 This is a schematic diagram of the hole cutter of the coil spring device provided in the embodiments of this application;

[0032] Figure 5 A schematic diagram showing the connection relationship of some mechanisms of the coil spring device provided in the embodiments of this application;

[0033] Figure 6 A schematic diagram of the coil spring device provided in the embodiments of this application from another perspective;

[0034] Figure 7 This is a schematic diagram of the coil spring device provided in the embodiments of this application from another perspective.

[0035] Reference numerals: 1000, coil spring device;

[0036] 100. Wire feeding mechanism; 110. First wire pressing wheel assembly; 111. First upper wire pressing wheel; 1111. Shaft of the first upper wire pressing wheel; 1112. Wire guide groove; 112. First lower wire pressing wheel; 1121. Shaft of the first lower wire pressing wheel; 120. Second wire pressing wheel assembly; 121. Second upper wire pressing wheel; 1211. Shaft of the second upper wire pressing wheel; 1212. Wire guide groove; 113. First drive assembly; 122. Second lower wire pressing wheel; 1221. Shaft of the second lower wire pressing wheel; 123. Second drive assembly; 130. Pressing assembly; 131. First pressing drive component; 132. Second pressing drive component; 133. First elastic component; 134. Second elastic component;

[0037] 200. Forming wheel; 210. Wire groove;

[0038] 300. Guide component; 301. Conveying channel; 3011. Inlet; 3012. Outlet; 310. Main body; 311. Main body channel; 312. First part; 313. Second part; 314. Drain outlet; 315. Mounting groove; 3151. Fixing hole; 316. Second groove; 317. Wire sleeve; 320. Hole cutter; 321. Main channel; 322. Spare channel; 323. First end face; 324. Second end face; 325. First groove; 330. Gasket; 331. First protrusion; 332. Second protrusion;

[0039] 400. Threshold pin;

[0040] 500. Shearing mechanism; 520. Cutting blade;

[0041] 600, Frame; 610, Swing arm; 630, Third drive component. Detailed Implementation

[0042] The embodiments of this application are described in detail below with reference to the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0043] In the description of this application, it should be understood that the terms "center", "middle", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0044] In the description of this application, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0045] In the description of this application, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0046] In the description of this application, the use of terms such as "as one implementation," "an embodiment," "some examples," "some embodiments," "illustrative embodiment," "example," "specific example," "some examples," etc., indicates that the specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0047] Please see Figures 1 to 3This application provides a coil spring device 1000, including a wire feeding mechanism 100, a forming wheel 200, and a guide member 300. The wire feeding mechanism 100 includes a first pressure wheel group 110 and a second pressure wheel group 120 distributed along a first direction x. The first pressure wheel group 110 and the second pressure wheel group 120 respectively form a wire inlet channel. The forming wheel 200 is rotatably disposed at the output end of the wire feeding mechanism 100. The outer periphery of the forming wheel 200 is provided with a wire groove 210. The wire feeding mechanism 100 is used to clamp and transport the steel wire to the wire groove 210. The forming wheel 200 can make the steel wire spirally coiled to form a spring. The guide member 300 is disposed between the wire feeding mechanism 100 and the forming wheel 200. The guide member 300 has two conveying channels 301. The inlets 3011 of the two conveying channels 301 are distributed along the first direction x and correspond one-to-one with the outlets of the two wire feeding channels. The outlets 3012 of the two conveying channels 301 correspond to different positions of the wire groove 210. The guide member 300 includes a body part 310 and a cutting tool 320. The cutting tool 320 is detachably installed at the downstream end of the guide member 300 along the wire conveying direction. The conveying channels 301 pass through the body part 310 and the cutting tool 320. The two channels in the cutting tool 320 are coplanar and parallel to each other.

[0048] The first pressure roller group 110 and the second pressure roller group 120 can independently clamp and transport two different steel wires. By setting the inlets 3011 of the two transport channels 301 of the guide member 300 to be distributed along the first direction x, it can adapt to the distribution of the two inlet channels in the wire feeding mechanism 100, and meet the requirement that the inlets 3011 and outlets of the transport channels 301 correspond to each other, so that the steel wires can smoothly enter the guide member 300 from the wire feeding mechanism 100. By setting the outlets 3012 of the two transport channels 301 of the guide member 300 to correspond to different positions in the wire guide groove 210, the requirements of different forming parameters of different steel wires can be met.

[0049] By configuring the guide 300 into two parts, the main body 310 and the cutting tool 320, and making the cutting tool 320 detachable and replaceable from the main body 310, the cutting tool 320 can be installed at the outlet 3012 of the conveying channel 301, which is prone to wear. When the conveying channel 301 in the cutting tool 320 is severely worn, only the cutting tool 320 can be replaced, thereby avoiding the need to replace the entire guide 300 and reducing the maintenance cost of the guide 300.

[0050] Optionally, with Figure 1 and Figure 2For example, in the diagram, the first direction x is horizontal, and the second direction z is vertical. That is, the inlets 3011 of the two conveying channels 301 are distributed horizontally. Of course, in other examples, the first direction can be vertical, and the second direction can be horizontal. No specific limitation is made here. The following will use... Figure 1 The direction shown in the image will be used as an example to continue the explanation.

[0051] In some embodiments, please refer to Figures 2 to 4 The cutting tool 320 has a set of main channels 321, and the main body 310 has a set of main channels 311. The main channels 321 and the main channels 311 are connected to each other to form a conveying channel 301. The cutting tool 320 also has a set of spare channels 322. The main channels 321 and the spare channels 322 are not connected to each other. The installation position between the cutting tool 320 and the main body 310 is adjustable. When the cutting tool 320 is installed in different positions on the main body 310, the main channels 311 can be connected to either the main channels 321 or the spare channels 322 to form the conveying channel 301. By incorporating two sets of channels in the borer 320—a main channel 321 and a backup channel 322—the installation orientation of the borer 320 and the body 310 can be reversed when the main channel 321 wears out. This allows the backup channel 322 to connect with the body channel 311 of the body 310, enabling the guide component 300 to be reused without replacing the entire guide component 300. This arrangement further extends the service life of the borer 320 and reduces the maintenance costs of the guide component 300.

[0052] It is understandable that the main channel 321 in the hole cutter 320 has two main channels 321 and two spare channels 322, and the main body channel 311 in the body part 310 also has two main channels 321. The two main channels 321 can be set one-to-one with the main body channel 311, or, when the hole cutter 320 is changed in installation position, the two spare channels 322 can be set one-to-one with the main body channel 311.

[0053] Optionally, the main channel 321 and the spare channel 322 can be identical in shape and size, or they can be set to different specifications. The main channel 321 or the spare channel 322 can be selected according to the actual needs of the steel wire. The naming method of the main channel 321 and the spare channel 322 does not restrict the order of use of the channels. Therefore, it can be understood that either the main channel 321 or the spare channel 322 can be put into use first, and when it is worn out and scrapped, the other channel can be used instead.

[0054] In some embodiments, please refer to Figure 4The main channel 321 and the backup channel 322 are arranged in parallel, with their inlet ends located at opposite ends of the cutting tool 320. That is, the cutting tool 320 has two opposite ends along the axial direction of the main channel 321, such as a first end face 323 and a second end face 324. The inlet of the main channel 321 is located on the first end face 323, and the outlet is located on the second end face 324. The inlet of the backup channel 322 is located on the second end face 324, and the outlet is located on the first end face 323. When using the cutting tool 320, the first end face 323 can be oriented towards the outlet of the main channel 311, at which point the main channel 321 is connected to the main channel 311, and the main channel 321 is put into use. When it is necessary to change the installation position of the hole cutter 320, the hole cutter 320 is removed from the main body 310 and the hole cutter 320 is rotated, for example, the hole cutter 320 is rotated along the z-axis so that the second end face 324 faces the outlet of the main body channel 311. At this time, the spare channel 322 is connected to the main body channel 311 and the spare channel 322 is put into use.

[0055] As an alternative implementation, the inlet of the main channel 321 and the inlet of the backup channel 322 can both be located on the first end face 323 of the cutting tool 320. When the guide 300 is in use, the cutting tool 320 is installed in the guide 300, the main channel 321 is connected to the main body channel 311, and the inlet of the backup channel 322 is blocked by the outer periphery of the main body part 310. When it is necessary to switch between the main channel 321 and the backup channel 322, the cutting tool 320 is rotated along the axial direction of the main channel 321, for example, the cutting tool 320 is rotated along the y-axis, so that the backup channel 322 is connected to the main body channel 311, and the inlet of the main channel 321 is blocked by the outer periphery of the main body part 310.

[0056] In some embodiments, the aperture of the body channel 311 is adapted to the diameter of the inserted steel wire, and the aperture of the main channel 321 is greater than or equal to the aperture of the body channel 311. When the aperture of the main channel 321 is equal to that of the body channel 311, the entire conveying channel 301 has a consistent aperture, which can adapt to the diameter of the inserted steel wire and play a guiding and supporting role in stabilizing the steel wire. When the aperture of the main channel 321 is greater than that of the body channel 311, it can reduce the friction between the steel wire and the main channel 321, improve the wear resistance of the cutting tool 320, and help to extend the service life of the cutting tool 320.

[0057] Optionally, the main channel 321 and the spare channel 322 can be configured with different apertures to accommodate steel wires of different specifications. When producing springs of different specifications, the production requirements of different specifications can be met by selectively using either the main channel 321 or the spare channel 322. In this case, the two sets of channels in the bore cutter 320 can improve the adaptability and versatility of the guide 300, and can also avoid replacing the entire guide 300, simplifying the operation process.

[0058] In some embodiments, the cutting tool 320 is constructed of cemented carbide steel, and its hardness is greater than that of the body 310. The use of cemented carbide steel in the cutting tool 320 leverages its high hardness to improve wear resistance and extend its service life, thereby reducing the frequency of replacement and lowering maintenance costs for the guide component 300. Setting the hardness of the cutting tool 320 to be greater than that of the body 310 also helps extend its service life and further reduce maintenance costs.

[0059] In some embodiments, a wire sleeve 317 is provided in the conveying channel 301 of the body 310, and the wire sleeve 317 is made of hard alloy steel. By installing the wire sleeve 317 in the conveying channel 301, the machining operation of the body 310 can be facilitated, the machining difficulty of the body 310 can be reduced, and the body 310 can be made to have high hardness and wear resistance.

[0060] Optionally, the main body 310 may be provided with a mounting groove 315, in which the hole cutter 320 can be fixed. By utilizing the support and fixing effect of the groove wall of the mounting groove 315 on the outer periphery of the hole cutter 320, the contact area and connection strength between the hole cutter 320 and the main body 310 can be increased, thereby improving the stability of the hole cutter 320 installation.

[0061] Furthermore, the groove wall of the mounting groove 315 can also be provided with fixing holes 3151. When the cutting tool 320 is provided on the body part 310, the outer periphery of the cutting tool 320 corresponds to the fixing hole 3151. The cutting tool 320 and the fixing hole 3151 can also be fixed together by bolts, further improving the connection strength between the cutting tool 320 and the body part 310. Of course, as an alternative implementation, the cutting tool 320 and the body part 310 can also be connected by an interference fit.

[0062] Optionally, the guide 300 may also include a gasket 330. When the drill bit 320 is installed in the mounting groove 315, the gasket 330 is disposed between the drill bit 320 and the groove wall of the mounting groove 315. The bolt passes through the fixing hole 3151 and abuts against one side of the gasket 330, and the other side of the gasket 330 abuts against the outer periphery of the drill bit 320, which helps to improve the connection strength between the drill bit 320 and the body 310.

[0063] Optionally, the gasket 330 has a first protrusion 331 and a second protrusion 332 on its surface, with the first protrusion 331 and the second protrusion 332 located on the same side of the gasket 330. The surface of the drill bit 320 that contacts the gasket 330 has a first groove 325, and the mounting groove 315 also has a second groove 316. When the gasket 330 is installed between the drill bit 320 and the mounting groove 315, the first protrusion 331 engages with the first groove 325, and the second protrusion 332 engages with the second groove 316. This arrangement further improves the connection strength between the drill bit 320 and the body 310, preventing the drill bit 320 from slipping out of the mounting groove 315.

[0064] In some embodiments, the body portion 310 includes a first portion 312 and a second portion 313 spaced apart, with the gap between the first portion 312 and the second portion 313 forming a drain outlet 314, and a conveying channel 301 passing through the first portion 312 and the second portion 313. By providing the drain outlet 314, the movement of the steel wire can carry oil stains on the surface of the steel wire into the drain outlet 314. When the oil stains remain in the drain outlet 314, it can prevent the oil stains from further entering the downstream conveying channel 301, thereby avoiding problems such as blockage in the conveying channel 301.

[0065] In some embodiments, the body portion 310 and the cutting tool 320 are spaced apart along the wire conveying direction, and the gap between the body portion 310 and the cutting tool 320 forms a drain port 314. Similarly, the gap between the body portion 310 and the cutting tool 320 can also form a drain port 314, where oil can remain, reducing the amount of oil entering the cutting tool 320 and thus preventing blockage of the conveying channel 301 in the cutting tool 320.

[0066] In some embodiments, please combine Figure 1 , Figure 6 and Figure 7The first pressing wheel assembly 110 includes a first upper pressing wheel 111 and a first lower pressing wheel 112 arranged in pairs along the second direction z. The first upper pressing wheel 111 and the first lower pressing wheel 112 rotate synchronously to clamp the steel wire and transport it along the third direction y. The second pressing wheel assembly includes a second upper pressing wheel 121 and a second lower pressing wheel 122 arranged in pairs along the second direction z. The second upper pressing wheel 121 and the second lower pressing wheel 122 rotate synchronously to clamp another steel wire and transport it along the third direction y. The first upper pressing wheel 111 and the second lower pressing wheel 122 are coaxially arranged. The shafts 1121 of the first upper pressing wheel 111 and the first lower pressing wheel 122 are parallel to each other. By coaxially arranging the first upper pressing wheel 111 and the second upper pressing wheel 121, and the first lower pressing wheel 112 and the second lower pressing wheel 122, the space occupied by multiple pressing wheels can be reduced, making the structure of the wire feeding mechanism 100 more compact. Furthermore, the first upper pressing wheel 111, the second upper pressing wheel 121, the first lower pressing wheel 112, and the second lower pressing wheel 122 can share the same rotational driving force; that is, a single power source can simultaneously drive all four pressing wheels, achieving synchronous rotation and meeting the requirements for clamping and conveying the wire. This simplifies the transmission mechanism and further simplifies the structure of the wire feeding mechanism 100.

[0067] Optionally, the first pressure roller group 110 is driven to rotate by the first drive assembly 113, and the second pressure roller group 120 is driven to rotate by the second drive assembly 123. Taking the first drive assembly 113 as an example, the first drive assembly 113 may include a drive component (e.g., a motor) and a transmission component (e.g., a transmission gear, a transmission belt, etc.). The drive component outputs power and transmits the power synchronously to the first upper pressure roller 111 and the first lower pressure roller 112 through the transmission component, so that the two pressure rollers in the first pressure roller group 110 rotate synchronously. The second drive assembly 123 can be configured in the same way as the first drive assembly 113. In this way, the first pressure roller group 110 and the second pressure roller group 120 can independently clamp and transport two different steel wires.

[0068] It should be noted that the naming of the first upper pressing wheel 111, the first lower pressing wheel 112, the second upper pressing wheel 121, and the second lower pressing wheel 122 does not limit the actual arrangement of the pressing wheels. That is, in alternative embodiments, the axis of the first upper pressing wheel 111 can be extended along the z-axis, and the first upper pressing wheel 111 and the first lower pressing wheel 112 can be distributed along the x-axis.

[0069] In some embodiments, the shaft 1211 of the second upper pressing wheel is sleeved on the outer periphery of the shaft 1111 of the first upper pressing wheel, and there is a movable gap between the shaft 1111 of the first upper pressing wheel and the shaft 1211 of the second upper pressing wheel; the shaft 1221 of the second lower pressing wheel is sleeved on the outer periphery of the shaft of the first lower pressing wheel 112, and there is a movable gap between the shaft 1221 of the second lower pressing wheel and the shaft of the first lower pressing wheel 112; the wire feeding mechanism 100 further includes a clamping assembly 130, which selectively clamps either the first upper pressing wheel 111 or the second upper pressing wheel 121, so that one of the first pressing wheel group 110 or the second pressing wheel group 120 is brought close to each other to clamp the wire being fed. By utilizing the movable clearance between the rotating shafts of the first upper pressing wheel 111 and the second upper pressing wheel 121, as well as the movable clearance between the rotating shafts of the first lower pressing wheel 112 and the second lower pressing wheel 122, the first upper pressing wheel 111 and the second upper pressing wheel 121 can move independently without interfering with each other when driven downwards. Similarly, the first lower pressing wheel 112 and the second lower pressing wheel 122 can also move independently. When any set of pressing wheels clamps the transport wire, it can prevent the other set of pressing wheels from clamping the wire as well, ensuring that only one wire is clamped and transported at a time, without affecting the rotation of the other set of pressing wheels. The rotating shafts of the first upper pressing wheel 111 and the second upper pressing wheel 121 are arranged in an inner and outer sleeve manner, which enables the two pressing wheels to be coaxially set and reduces the space occupied by the rotating shaft, making the structural connection of the two pressing wheel sets more compact.

[0070] In some embodiments, the clamping assembly 130 includes a first clamping drive member 131 and a second clamping drive member 132 distributed along a first direction x. The first clamping drive member 131 drives a first upper clamping roller 111 to press against a first lower clamping roller 112, and the second clamping drive member 132 drives a second upper clamping roller 121 to press against a second lower clamping roller 122. By using two drive members to drive the first upper clamping roller 111 and the second upper clamping roller 121 respectively, the first clamping roller assembly 110 and the second clamping roller assembly 120 can be selectively driven, thereby achieving the clamping and conveying of one of the two steel wires.

[0071] The clamping assembly 130 also includes a first elastic element 133 and a second elastic element 134. The first clamping drive 131 and the first upper pressure roller 111 are elastically connected via the first elastic element 133, and the second clamping drive 132 and the second upper pressure roller 121 are elastically connected via the second elastic element 134. The first elastic element 133 provides an elastic force to the first upper pressure roller 111 away from the first lower pressure roller 112, and the second elastic element 134 provides an elastic force to the second upper pressure roller 121 away from the second lower pressure roller 122. By providing the first elastic element 133, a direct rigid connection between the first clamping drive 131 and the first upper pressure roller 111 can be avoided, improving the stability and reliability of driving the first upper pressure roller 111. Meanwhile, since the first elastic element 133 is in a compressed state, it has an elastic force to return to its original shape, which can push the first pressing drive element 131 away from the first upper pressing wheel 111, thereby causing the first upper pressing wheel 111 to return to its unpressed state and achieving the reset effect of the first upper pressing wheel 111. Similarly, the working principle and effect of the second elastic element 134 are the same as those of the first elastic element 133. For details, please refer to the first elastic element 133, which will not be repeated here.

[0072] For example, the first pressing drive 131 and the second pressing drive 132 may be cylinders, motors, etc., and the first elastic element 133 and the second elastic element 134 may be springs.

[0073] In some embodiments, at least one of the first upper pressure roller 111 and the first lower pressure roller 112 has a wire-passing groove 1112 on its outer peripheral side, and at least one of the second upper pressure roller 121 and the second lower pressure roller 122 has a wire-passing groove 1212 on its outer peripheral side. The wire-passing groove 1112 (or wire-passing groove 1212) is used for the steel wire to pass through, and the cross-sectional shape of the wire-passing groove 1112 (or wire-passing groove 1212) includes a triangular or arc-shaped shape. By providing the wire-passing groove 1112, the steel wire can be accommodated in the wire-passing groove 1112, which improves the clamping and limiting effect of the two pressure rollers of the pressure roller group on the steel wire, avoids problems such as wire deviation or slippage during the conveying process, and improves the stability of the steel wire clamping and conveying process.

[0074] Taking the first pressure roller group 110 as an example, the wire guide groove 1112 can be provided in both the first upper pressure roller 111 and the first lower pressure roller 112, or it can be provided in only one of the first upper pressure roller 111 or the first lower pressure roller 112. The setting method of the wire guide groove 1212 in the second pressure roller group 120 can refer to the setting method in the first pressure roller group 110.

[0075] Typically, the cross-sectional shape of a steel wire is circular. Therefore, a wire guide groove 1112 with an arc-shaped cross-section can better accommodate the steel wire and provide support and restraint. A wire guide groove 1112 with a triangular cross-section is easier to implement and helps reduce the processing difficulty of the wire guide groove 1112.

[0076] In some embodiments, the forming wheel 200 moves in a plane perpendicular to the axis to change the distance between the wire groove 210 and the outlet 3012 of the conveying channel 301, thereby changing the waist diameter of the spring. The wire groove 210 can limit the contact position between the wire and the forming wheel 200, guide the wire to impact the forming wheel 200 along the wire groove 210 to wind and form a spring, improving the accuracy of spring forming.

[0077] For example, the forming wheel 200 can move by sliding or oscillating, thereby changing the distance between the wire groove 210 and the outlet 3012 of the conveying channel 301. It is understood that the closer the forming wheel 200 is to the outlet 3012 of the conveying channel 301, the smaller the waist diameter of the spring, and the farther the distance, the larger the waist diameter of the spring.

[0078] In one example, the axis of the forming wheel 200 is set along a first direction x, and the two outlets 3012 of the conveying channel 301 of the guide 300 are respectively set along a second direction z. In this way, the two body channels 311 in the body portion 310 of the guide 300 are neither parallel nor intersecting, and the two body channels 311 are located on different planes, which are intersecting.

[0079] In another example, the axis of the forming wheel 200 is set perpendicular to the rotation axis of the first pressing wheel group 110 and the second pressing wheel group 120, and the two outlets 3012 of the conveying channel 301 of the guide 300 are distributed along the first direction x.

[0080] In some embodiments, the coil spring device 1000 further includes a frame 600, a rocker arm 610, a connecting rod (not shown), and a third drive member 630. The forming wheel 200 is mounted on the rocker arm 610, with one end of the rocker arm 610 fulcrum mounted on the frame 600 and the other end connected to the connecting rod. The third drive member 630 drives the rocker arm 610 to move the forming wheel 200 closer to or further away from the outlet of the conveying channel. Utilizing the transmission action of the rocker arm 610 and the connecting rod, the forming wheel 200 can have a support point during movement, improving the stability and accuracy of its movement. Furthermore, the rocker arm 610 and the connecting rod allow for flexible and reasonable arrangement of the transmission path of the forming wheel 200, making the entire coil spring device 1000 more compact.

[0081] In some embodiments, the coil spring device 1000 further includes an ejector pin 400, which is disposed downstream of the forming wheel 200 along the wire conveying direction. The ejector pin 400 is axially movable parallel to the forming wheel 200 and is used to push the wire during the wire winding process to change the spring pitch. The ejector pin 400 has a pushing and guiding effect on the wire during the forming process, and the spring pitch parameter can be adjusted by changing the position of the ejector pin 400.

[0082] In some embodiments, please combine Figure 5 and Figure 6 The coiling spring device 1000 also includes a shearing mechanism 500, which includes a cutter 520 and a fourth driving member (not shown). The cutter 520 is located at the outlet 3012 of the guide member 300. The fourth driving member drives the cutter 520 to move or swing to cut the steel wire. After the cutter 520 cuts the steel wire, the steel wire forms a complete spring. By utilizing the cutting action of the cutter 520, springs can be formed continuously in sequence.

[0083] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this application. Furthermore, unless otherwise specified, the embodiments and features described in the embodiments of this application can be combined with each other.

Claims

1. A coiled spring device, characterized in that: include The wire feeding mechanism includes a first wire pressing wheel group and a second wire pressing wheel group distributed along a first direction, wherein the first wire pressing wheel group and the second wire pressing wheel group respectively form a wire inlet channel; A forming wheel is rotatably mounted at the output end of the wire feeding mechanism. The outer circumference of the forming wheel is provided with a wire groove. The wire feeding mechanism is used to clamp and transport the steel wire to the wire groove. The forming wheel can cause the steel wire to be spirally wound to form a spring. A guide is disposed between the wire feeding mechanism and the forming wheel. The guide has two conveying channels. The inlets of the two conveying channels are distributed along a first direction and correspond one-to-one with the outlets of the two wire inlet channels. The outlets of the two conveying channels correspond to different positions of the wire groove. The guide includes a body and a cutting tool. The cutting tool is detachably installed at the downstream end of the guide along the conveying direction of the steel wire. The conveying channel passes through the body and the cutting tool. The two channels in the cutting tool are coplanar and parallel to each other.

2. The coil spring device according to claim 1, characterized in that: The cutting tool has a set of main channels, and the main body has a set of main channels. The main channels and the main channels are connected one-to-one to form the conveying channel. The cutting tool also has a set of spare channels. The main channels and the spare channels are not connected to each other. The installation position between the cutting tool and the main body is adjustable. When the cutting tool is installed in different positions on the main body, the main channels can be connected to either the main channels or the spare channels to form the conveying channel.

3. The coil spring device according to claim 2, characterized in that: The main channel and the backup channel are arranged in parallel, and the entrance ends of the main channel and the backup channel are located at opposite ends of the hole cutter.

4. The coil spring device according to claim 2, characterized in that: The aperture of the main channel is adapted to the diameter of the inserted steel wire, and the aperture of the main channel is greater than or equal to the aperture of the main channel.

5. The coil spring device according to any one of claims 1 to 4, characterized in that: The hole cutter is made of cemented carbide steel, and the hardness of the hole cutter is greater than that of the body.

6. The coil spring device according to any one of claims 1 to 4, characterized in that: The main body is provided with a wire sleeve in the conveying channel, and the wire sleeve is made of hard alloy steel.

7. The coil spring device according to any one of claims 1 to 4, characterized in that: The main body includes a first part and a second part spaced apart, with a sewage outlet formed by the gap between the first part and the second part, and the conveying channel passing through the first part and the second part; or The main body and the cutting tool are spaced apart along the wire conveying direction, and the gap between the main body and the cutting tool forms a drain outlet.

8. The coil spring device according to any one of claims 1 to 4, characterized in that: The first pressure roller assembly includes a first upper pressure roller and a first lower pressure roller arranged in pairs along a second direction. The first upper pressure roller and the first lower pressure roller rotate synchronously to clamp the steel wire and transport it along a third direction. The second pressure roller assembly includes a second upper pressure roller and a second lower pressure roller arranged in pairs along the second direction. The second upper pressure roller and the second lower pressure roller rotate synchronously to clamp another steel wire and transport it along a third direction. The first upper pressure roller and the second upper pressure roller are coaxially arranged, and the second upper pressure roller and the second lower pressure roller are coaxially arranged. The rotation axes of the first upper pressure roller and the first lower pressure roller are parallel.

9. The coil spring device according to claim 8, characterized in that: The shaft of the second upper pressing wheel is sleeved on the outer circumference of the shaft of the first upper pressing wheel, and there is a movable gap between the shaft of the first upper pressing wheel and the shaft of the second upper pressing wheel; the shaft of the second lower pressing wheel is sleeved on the outer circumference of the shaft of the first lower pressing wheel, and there is a movable gap between the shaft of the second lower pressing wheel and the shaft of the first lower pressing wheel. The wire feeding mechanism further includes a clamping component, which clamps either the first upper pressure roller or the second upper pressure roller so that one of the first pressure roller group or the second pressure roller group moves closer to each other to clamp the wire being fed.

10. The coil spring device according to claim 9, characterized in that: The clamping assembly includes a first clamping drive member and a second clamping drive member distributed along a first direction. The first clamping drive member drives the first upper pressure roller to press against the first lower pressure roller, and the second clamping drive member drives the second upper pressure roller to press against the second lower pressure roller.

11. The coil spring device according to claim 10, characterized in that: The clamping assembly further includes a first elastic element and a second elastic element. The first clamping drive and the first upper pressing wheel are elastically connected through the first elastic element, and the second clamping drive and the second upper pressing wheel are elastically connected through the second elastic element. The first elastic element is used to provide an elastic force to the first upper pressing wheel away from the first lower pressing wheel, and the second elastic element is used to provide an elastic force to the second upper pressing wheel away from the second lower pressing wheel.

12. The coil spring device according to claim 8, characterized in that: The outer peripheral side of at least one of the first upper pressing wheel and the first lower pressing wheel is provided with a wire guide groove, and the outer peripheral side of at least one of the second upper pressing wheel and the second lower pressing wheel is provided with a wire guide groove. The wire guide groove is used for steel wire to pass through, and the cross-sectional shape of the wire guide groove includes a triangle or a circular arc.

13. The coil spring device according to any one of claims 1 to 4, characterized in that: The forming wheel moves in a plane perpendicular to the axis to change the distance between the wire groove and the outlet of the conveying channel, thereby changing the waist diameter of the spring.

14. The coil spring device according to claim 13, characterized in that: The axis of the forming wheel is arranged along a first direction, and the two outlets of the conveying channel of the guide are respectively arranged along a second direction.

15. The coil spring device according to claim 13, characterized in that: The axis of the forming wheel is perpendicular to the rotation axis of the first and second pressing wheel groups, and the two outlets of the conveying channel of the guide are distributed along the first direction.

16. The coil spring device according to claim 1, characterized in that: The coil spring device also includes a frame, a swing arm, a connecting rod, and a third driving component. The forming wheel is mounted on the swing arm, one end of which is fulcrumd on the frame, and the other end is connected to the connecting rod. The third driving component drives the swing arm to move the forming wheel closer to or away from the outlet of the conveying channel.

17. The coil spring device according to any one of claims 1 to 4, characterized in that: The coil spring device also includes a push pin, which is disposed at the downstream end of the forming wheel along the wire conveying direction. The push pin is movable parallel to the axial direction of the forming wheel and is used to push the wire during the wire winding process to change the spring pitch.

18. The coil spring device according to any one of claims 1 to 4, characterized in that: The coil spring device further includes a shearing mechanism, which includes a cutter and a fourth driving member. The cutter is disposed at the outlet of the guide member, and the fourth driving member drives the cutter to move or swing to cut the steel wire.

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