Fixed-length wire feeding mechanism

Abstract

The utility model discloses a fixed-length wire feeding mechanism, and relates to the technical field of wire harness processing. The wire feeding device comprises a rack, a wire feeding module, a first driving module and a gap adjusting module, two sliding seats which are arranged in parallel are connected to the rack in a sliding manner; the wire feeding module comprises an upper synchronous belt transmission assembly, an upper detection wheel, a lower synchronous belt transmission assembly and a lower detection wheel, the upper synchronous belt transmission assembly and the upper detection wheel are arranged on the upper sliding seat, the lower synchronous belt transmission assembly and the lower detection wheel are arranged on the lower sliding seat, and the upper detection wheel is coaxially connected with a rotary encoder; the first driving module is used for driving the upper synchronous belt transmission assembly and the lower synchronous belt transmission assembly to drive an electric wire to be fed; the gap adjusting module comprises a ball screw pair and a second driving module, and the ball screw pair is provided with two nuts fixedly connected with the sliding seat. According to the utility model, a miniaturized structural design is adopted, the installation space is reduced, the length of a sent wire can be detected in real time, and processing errors are avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to a harness processing technical field, especially relates to a fixed-length wire feeding mechanism of harness. BACKGROUND

[0002] In the processing of the harness, in order to ensure the continuity of material supply and processing, it is necessary to adopt the wire feeding mechanism to accurately transport the electric wire between various stations. In the existing wire feeding mechanism, the following deficiencies still exist: the wire feeding mechanism is complex and bulky in structure, is not compact in design, occupies a large amount of installation space, and is not conducive to installation on an automatic production line equipment; the wire feeding length error of the wire feeding mechanism is large, resulting in processing error. UTILITY MODEL CONTENTS

[0003] The utility model solves the technical problem to provide a fixed-length wire feeding mechanism, adopts miniaturized structure design, reduces the installation space, can detect the length of the wire in real time, and avoids processing error.

[0004] To solve the above technical problems, the utility model adopts the following technical scheme:

[0005] A fixed-length wire feeding mechanism, comprising a rack and a wire feeding module, a first driving module and a gap adjusting module arranged on the rack; two parallel sliding seats are slidingly connected to the rack, and the two sliding seats can slide up and down along the height direction of the rack; the wire feeding module comprises an upper synchronous belt transmission assembly, an upper detection wheel, a lower synchronous belt transmission assembly and a lower detection wheel, the upper synchronous belt transmission assembly and the upper detection wheel are arranged on the upper sliding seat, the lower synchronous belt transmission assembly and the lower detection wheel are arranged on the lower sliding seat, and a rotary encoder is coaxially connected to the upper detection wheel; the first driving module is used to drive the upper synchronous belt transmission assembly and the lower synchronous belt transmission assembly to drive the electric wire to feed; the gap adjusting module comprises a ball screw pair and a second driving module, the ball screw pair is vertically arranged on the rack, and the ball screw pair is provided with two nuts fixedly connected with the sliding seats, and the second driving module is connected with the ball screw pair.

[0006] In some embodiments, the upper synchronous belt transmission assembly and the lower synchronous belt transmission assembly each comprise a wire feeding driving synchronous wheel, a wire feeding driven synchronous wheel, a wire feeding synchronous belt and at least two tensioning wheels, the wire feeding driving synchronous wheel is connected with the output end of the first driving module, the wire feeding driven synchronous wheel is connected with the wire feeding driving synchronous wheel through the wire feeding synchronous belt, and the tensioning wheel is arranged on the inner side of the wire feeding synchronous belt and is used to control the tensioning force of the wire feeding synchronous belt.

[0007] In at least one embodiment, a first sliding groove is arranged on the rack along the height direction, a first sliding block in sliding connection with the first sliding groove is arranged on the sliding seat, the first sliding block passes through the sliding groove and is fixedly connected with a mounting plate, the mounting plate is provided with a second sliding groove along the height direction; the wire feeding driving synchronous wheel, the wire feeding driven synchronous wheel and the tensioning wheel are all arranged on the mounting plate through a center shaft, the center shaft of one of the tensioning wheels is provided with a second sliding block in sliding connection with the second sliding groove, and the second sliding block is provided with an adjusting screw in threaded connection with the mounting plate.

[0008] Compared with the prior art, the utility model at least realizes following beneficial effects:

[0009] (1) The utility model discloses a miniaturized structure design, and the wire feeding module, the first driving module and the gap adjusting module are integrated on the rack, so that the installation space is reduced, the automatic production line equipment is suitable for installation and use, and a work station is formed.

[0010] (2) The first driving module drives the upper synchronous belt transmission assembly and the lower synchronous belt transmission assembly to work, and the upper synchronous belt transmission assembly and the lower synchronous belt transmission assembly are in contact with the electric wire, so that the electric wire can be uniformly compressed and pressed, and the electric wire is driven to advance to complete the wire feeding action, and the rotary encoder can obtain the rotation angle and speed of the upper detection wheel, so that the length of the fed electric wire can be detected in real time, and if there is deviation from the wire feeding length set value, the first driving module can be adjusted correspondingly, so that the machining error can be avoided.

[0011] (3) When conveying electric wires of different diameters, the second driving module drives the ball screw pair to work, the nut of the ball screw pair moves up and down, so that the two sliding seats move up and down to adjust the gap between the upper synchronous belt transmission assembly and the lower synchronous belt transmission assembly, and the compression force of the electric wire can be accurately controlled. BRIEF DESCRIPTION OF DRAWINGS

[0012] One or more embodiments of the utility model will be described by way of example only with reference to the drawings, in which:

[0013] Fig. 1 It is a structural schematic view of the embodiment of the utility model;

[0014] Fig. 2 It is a structural schematic view of another perspective of the embodiment of the utility model;

[0015] Fig. 3 It is a connection structure schematic view of the wire feeding module and the sliding seat of the embodiment of the utility model;

[0016] Fig. 4 It is a connection structure schematic view of another perspective of the wire feeding module and the sliding seat of the embodiment of the utility model;

[0017] Fig. 5The structural schematic view of the first driving module of the utility model embodiment is shown in the figure.

[0018] Fig. 6 The structural schematic view of the gap adjusting module of the utility model embodiment is shown in the figure.

[0019] The figure mark is: 1, rack; 11, first sliding groove; 2, wire feeding module; 21, upper synchronous belt transmission assembly; 22, upper detection wheel; 221, rotary encoder; 23, lower synchronous belt transmission assembly; 24, lower detection wheel; 3, first driving module; 31, first servo motor; 32, first synchronous belt transmission assembly; 33, gear assembly; 331, upper gear; 332, lower gear; 34, second synchronous belt transmission assembly; 35, third synchronous belt transmission assembly; 4, gap adjusting module; 41, ball screw pair; 411, nut; 412, screw rod; 42, second driving module; 421, second servo motor; 422, fourth synchronous belt transmission assembly; 5, sliding seat; 51, first sliding block; 6, mounting plate; 61, second sliding groove; 7, central shaft; 8, second sliding block; 9, linear guide rail; 100, wire feeding driving synchronous wheel; 200, wire feeding driven synchronous wheel; 300, wire feeding synchronous belt; 400, tension pulley. DETAILED DESCRIPTION

[0020] The utility model will be described in detail below with reference to the exemplary embodiments in the drawings. But it should be known that the present application can be realized through various different forms, and should not be understood as limiting to the embodiments set forth herein. The embodiments are provided herein to make the disclosure of the present application more complete, and to fully convey the concept of the present application to the person skilled in the art.

[0021] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship shown in the drawings based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "several", "a plurality of" is two or more, unless otherwise explicitly specified and limited. In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature can include the first and second features directly contacting, or the first and second features not directly contacting but contacting through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes the first feature directly above and obliquely above the second feature, or only indicates that the first feature is higher than the second feature in horizontal height. The first feature "under", "below" and "below" the second feature includes the first feature directly below and obliquely below the second feature, or only indicates that the first feature is lower than the second feature in horizontal height.

[0022] As Figs. 1-6As shown, a constant-length wire feeding mechanism comprises a rack 1, a wire feeding module 2, a first driving module 3 and a gap adjusting module 4 arranged on the rack 1; two parallel sliding seats 5 are slidingly connected to the rack 1 and can slide up and down along the height direction of the rack 1; the wire feeding module 2 comprises an upper synchronous belt transmission assembly 21, an upper detection wheel 22, a lower synchronous belt transmission assembly 23 and a lower detection wheel 24, the upper synchronous belt transmission assembly 21 and the upper detection wheel 22 are arranged on the upper sliding seat 5, the lower synchronous belt transmission assembly 23 and the lower detection wheel 24 are arranged on the lower sliding seat 5, and a rotary encoder 221 is coaxially connected to the upper detection wheel 22; the first driving module 3 is connected with the upper synchronous belt transmission assembly 21 and the lower synchronous belt transmission assembly 23, and is used for driving the upper synchronous belt transmission assembly 21 and the lower synchronous belt transmission assembly 23 to feed the wire; the gap adjusting module 4 comprises a ball screw pair 41 and a second driving module 42, the ball screw pair 41 is vertically arranged on the rack 1, and the ball screw pair 41 is provided with two nuts 411, the two nuts 411 are fixedly connected with the upper and lower sliding seats 5 respectively, and the second driving module 42 is connected with the ball screw pair 41 and is used for driving the nuts 411 of the ball screw pair 41 to move the sliding seats 5 up and down.

[0023] The working principle of the constant-length wire feeding mechanism is as follows: the wire passes between the upper synchronous belt transmission assembly 21, the upper detection wheel 22 and the lower synchronous belt transmission assembly 23, the lower detection wheel 24, the first driving module 3 drives the upper synchronous belt transmission assembly 21 and the lower synchronous belt transmission assembly 23 to work, the upper synchronous belt transmission assembly 21 and the lower synchronous belt transmission assembly 23 cooperate with the wire to uniformly compress the wire and drive the wire to advance to complete the wire feeding action; during the wire feeding process, the upper detection wheel 22 and the lower detection wheel 24 rotate in cooperation, the rotary encoder 221 is used for converting the mechanical rotary motion of the upper detection wheel 22 into an electric signal to obtain the rotary angle and speed of the upper detection wheel 22, so that the length of the wire fed can be detected in real time, and the first driving module 3 is adjusted correspondingly if there is a deviation from the set value; when conveying wires with different diameters, the gap between the upper synchronous belt transmission assembly 21 and the lower synchronous belt transmission assembly 23 can be adjusted by the gap adjusting module 4, the second driving module 42 drives the ball screw pair 41 to work, the nuts 411 of the ball screw pair 41 move up and down, thereby driving the two sliding seats 5 to move up and down to adjust the gap between the upper synchronous belt transmission assembly 21 and the lower synchronous belt transmission assembly 23, so as to accurately control the compression force of the wire; the constant-length wire feeding mechanism adopts miniaturized structure design, integrates the wire feeding module 2, the first driving module 3 and the gap adjusting module 4 on the rack 1, reduces the installation space, is suitable for being installed on an automatic production line equipment and becomes a work station.

[0024] Specifically, the upper synchronous belt transmission assembly 21 and the lower synchronous belt transmission assembly 23 each include a wire feeding driving synchronous wheel 100, a wire feeding driven synchronous wheel 200, a wire feeding synchronous belt 300, and at least two tensioning wheels 400. The wire feeding driving synchronous wheel 100 is connected with the output end of the first driving module 3. The wire feeding driven synchronous wheel 200 is connected with the wire feeding driving synchronous wheel 100 through the wire feeding synchronous belt 300. The tensioning wheels 400 are arranged on the inner side of the wire feeding synchronous belt 300 and are used for controlling the tension of the wire feeding synchronous belt 300.

[0025] Further, the first sliding groove 11 is arranged on the rack 1 along the height direction. The first sliding block 51 is arranged on the sliding seat 5 and is in sliding connection with the first sliding groove 11. The first sliding block 51 passes through the first sliding groove 11 and is fixedly connected with the mounting plate 6. The second sliding groove 61 is arranged on the mounting plate 6 along the height direction. The wire feeding driving synchronous wheel 100, the wire feeding driven synchronous wheel 200, and the tensioning wheels 400 are arranged on the mounting plate 6 through a center shaft 7. The center shaft 7 of one of the tensioning wheels 400 is provided with the second sliding block 8 which is in sliding connection with the second sliding groove 61. The second sliding block 8 is provided with the adjusting screw (not shown in the figure) which is in threaded connection with the mounting plate 6. When the tension of the wire feeding synchronous belt 300 is adjusted, the adjusting screw is loosened, and the second sliding block 8 is slid upward or downward to adjust the position of the tensioning wheel 400. The tensioning wheel 400 and the other tensioning wheels 400 cooperate to tension the wire feeding synchronous belt 300, so as to control the tension of the wire feeding synchronous belt 300. It should be noted that the tensioning wheel 400 which can slide upward and downward is in contact with the wire feeding synchronous belt 300 which is away from the electric wire, so as to avoid affecting the compression and conveying of the electric wire by the wire feeding synchronous belt 300.

[0026] Further, the linear guide rail 9 is arranged on the rack 1 along the height direction. The sliding seat 5 is slidably arranged on the linear guide rail 9. The linear guide rail 9 can improve the accuracy of the upward and downward movement of the sliding seat 5.

[0027] In order to ensure that the upper detection wheel 22 and the lower detection wheel 24 cooperate to rotate during the wire feeding process, the lower detection wheel 24 is connected with the driven synchronous wheel of the lower synchronous belt transmission assembly 23 through a synchronous belt transmission assembly. Therefore, the lower detection wheel 24 can be driven to rotate by the lower synchronous belt transmission assembly 23. The upper detection wheel 22 can cooperate with the lower detection wheel 24 and the electric wire to rotate.

[0028] Specifically, the first driving module 3 comprises a first servo motor 31, a first synchronous belt transmission assembly 32, a gear assembly 33, a second synchronous belt transmission assembly 34 and a third synchronous belt transmission assembly 35, the first synchronous belt transmission assembly 32, the second synchronous belt transmission assembly 34 and the third synchronous belt transmission assembly 35 each comprise a driving synchronous wheel, a driven synchronous wheel and a synchronous belt, the gear assembly 33 comprises an upper gear 331 and a lower gear 332 in meshing, the output shaft of the first servo motor 31 is connected with the driving synchronous wheel of the first synchronous belt transmission assembly 32, the driven synchronous wheel of the first synchronous belt transmission assembly 32 is coaxially connected with the lower gear 332 and the driving synchronous wheel of the second synchronous belt transmission assembly 34, the upper gear 331 is connected with the driving synchronous wheel of the third synchronous belt transmission assembly 35, and the driven synchronous wheels of the second synchronous belt transmission assembly 34 and the third synchronous belt transmission assembly 35 are coaxially connected with the wire feeding driving synchronous wheel 100 of the upper synchronous belt transmission assembly 21 and the lower synchronous belt transmission assembly 23 respectively. During the wire feeding process, if the rotation encoder 221 detects that the length of the fed wire deviates from the wire feeding length setting value, the first servo motor 31 can perform closed-loop compensation.

[0029] The second driving module 42 comprises a second servo motor 421 and a fourth synchronous belt transmission assembly 422, the fourth synchronous belt transmission assembly 422 also comprises a driving synchronous wheel, a driven synchronous wheel and a synchronous belt, the output shaft of the second servo motor 421 is connected with the driving synchronous wheel of the fourth synchronous belt transmission assembly 422, and the driven synchronous wheel of the fourth synchronous belt transmission assembly 422 is connected with the screw rod 412 of the ball screw pair 41. When feeding wires with different diameters, the gap between the upper synchronous belt transmission assembly 21 and the lower synchronous belt transmission assembly 23 can be accurately adjusted through the second servo motor 421, so that the wire feeding pressure can be accurately controlled without adjusting the mechanical part.

[0030] It should be understood that all the above embodiments are exemplary but not limiting, any modification, equivalent change and modification made by the person skilled in the art to the above described specific embodiments under the concept of the present application still belong to the scope of the technical scheme of the present application.

Claims

1. A fixed-length wire feeding mechanism, characterized in that: It includes a frame and a wire feeding module, a first drive module and a gap adjustment module mounted on the frame; Two parallel sliding seats are slidably connected to the frame, and the two sliding seats can slide up and down along the height direction of the frame. The wire feeding module includes an upper synchronous belt drive assembly, an upper detection wheel, a lower synchronous belt drive assembly, and a lower detection wheel. The upper synchronous belt drive assembly and the upper detection wheel are mounted on the upper sliding seat, and the lower synchronous belt drive assembly and the lower detection wheel are mounted on the lower sliding seat. A rotary encoder is coaxially connected to the upper detection wheel. The first drive module is used to drive the upper synchronous belt drive assembly and the lower synchronous belt drive assembly to drive the wire to feed the wire; The gap adjustment module includes a ball screw pair and a second drive module. The ball screw pair is vertically mounted on the frame and has two nuts that are fixedly connected to the sliding seat. The second drive module is connected to the ball screw pair.

2. The fixed-length wire feeding mechanism according to claim 1, characterized in that: Both the upper and lower synchronous belt drive assemblies include a wire feeding active synchronous pulley, a wire feeding driven synchronous pulley, a wire feeding synchronous belt, and at least two tension pulleys. The wire feeding active synchronous pulley is connected to the output end of the first drive module. The wire feeding driven synchronous pulley is connected to the wire feeding active synchronous pulley through the wire feeding synchronous belt. The tension pulley is located inside the wire feeding synchronous belt and is used to control the tension of the wire feeding synchronous belt.

3. The fixed-length wire feeding mechanism according to claim 2, characterized in that: The frame is provided with a first slide groove along the height direction. The sliding seat is provided with a first slider that is slidably connected to the first slide groove. The first slider passes through the slide groove and is fixedly connected to a mounting plate. The mounting plate is provided with a second slide groove along the height direction. The wire feeding drive synchronizing wheel, the wire feeding driven synchronizing wheel and the tensioning wheel are all mounted on the mounting plate through a central shaft. One of the tensioning wheels is provided with a second slider that is slidably connected to the second slide groove on its central shaft. The second slider is provided with an adjusting screw that is threadedly connected to the mounting plate.

4. The fixed-length wire feeding mechanism according to claim 1, characterized in that: The frame is equipped with a linear guide rail along the height direction; the sliding seat is slidably mounted on the linear guide rail.

5. The fixed-length wire feeding mechanism according to claim 1, characterized in that: The first drive module includes a first servo motor, a first synchronous belt drive assembly, a gear assembly, a second synchronous belt drive assembly, and a third synchronous belt drive assembly. Each of the first, second, and third synchronous belt drive assemblies includes a driving synchronous pulley, a driven synchronous pulley, and a synchronous belt. The gear assembly includes a meshing upper gear and a lower gear. The output shaft of the first servo motor is connected to the driving synchronous pulley of the first synchronous belt drive assembly. The driven synchronous pulley of the first synchronous belt drive assembly is coaxially connected to the lower gear and the driving synchronous pulley of the second synchronous belt drive assembly. The upper gear is connected to the driving synchronous pulley of the third synchronous belt drive assembly. The driven synchronous pulleys of the second and third synchronous belt drive assemblies are coaxially connected to the wire feeding driving synchronous pulleys of the lower and upper synchronous belt drive assemblies, respectively.

6. The fixed-length wire feeding mechanism according to claim 1, characterized in that: The second drive module includes a second servo motor and a fourth synchronous belt drive assembly. The fourth synchronous belt drive assembly also includes a driving synchronous pulley, a driven synchronous pulley, and a synchronous belt. The output shaft of the second servo motor is connected to the driving synchronous pulley of the fourth synchronous belt drive assembly, and the driven synchronous pulley of the fourth synchronous belt drive assembly is connected to the lead screw of the ball screw pair.

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