A concentric wire bundle and a concentricity detection system for the same

Abstract

The application discloses a concentric wire harness and a concentricity detection system thereof. The detection system comprises a lens. A light transmission support is fixedly arranged in front of the lens. A light transmission hole coaxial with the lens is formed in the light transmission support. A ring-shaped light supplement lamp is fixedly installed on the side of the light transmission hole away from the lens. A wire harness guide is arranged on the side of the ring-shaped light supplement lamp away from the lens. The wire harness guide can guide the measured wire harness along the lens barrel axis direction. A wire harness end part restraining unit is arranged at the end of the wire harness guide close to the ring-shaped light supplement lamp. The end part restraining unit can position the end part of the measured wire harness and constrain the outer contour of the wire harness end part of the measured wire harness to be coaxial with the axis of the lens. The lens can be completely centered to shoot the wire harness end part of the measured wire harness.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of wire harness detection. BACKGROUND

[0002] The concentricity detection process of the concentric wire harness is to shoot the end of the concentric wire harness along the axial direction by the CCD vision camera, to obtain the end pattern of the wire harness, as shown in Figure 2 , to judge the concentricity of the wire core and the outer contour of the wire harness based on the obtained pattern, and to determine the qualification if the concentricity meets the requirements.

[0003] The best shooting angle of the CCD vision camera should be that the lens axis of the vision camera is coaxial with the axis of the circular outer contour of the end of the measured wire harness, as shown in Figure 1 , the pattern obtained at this angle is the best central vertical shooting angle, thereby avoiding the error of oblique shooting, and in the existing concentricity visual detection, the shooting angle is not strictly constrained. SUMMARY

[0004] The purpose of the application is to overcome the deficiencies in the prior art, and to provide a concentric wire harness and a concentricity detection system for the concentric wire harness, which can make the lens completely centered to shoot the wire harness end of the measured wire harness in the final shooting stage.

[0005] Technical scheme: To achieve the above-mentioned purpose, a concentricity detection system for a concentric wire harness provided by the application comprises a lens; a light transmission support is fixedly arranged in front of the lens; a light transmission hole coaxial with the lens is formed through the light transmission support; a ring-shaped light supplement lamp is fixedly installed coaxially on the side of the light transmission hole away from the lens; and the ring-shaped light supplement lamp has a ring-shaped light emitting surface on the side away from the lens.

[0006] A wire harness guide is arranged on the side of the ring-shaped light supplement lamp away from the lens, which can guide the measured wire harness along the lens barrel axis direction; a wire harness end constraint unit is arranged at the end of the wire harness guide close to the ring-shaped light supplement lamp, which can position the end of the measured wire harness and constrain the outer contour of the wire harness end of the measured wire harness to be coaxial with the axis of the lens.

[0007] Further, the wire harness guide comprises a conical wire harness guide horn, which is fixed by a support and coaxial with the lens; and the horn-shaped guide port of the wire harness guide horn is located on the side away from the ring-shaped light supplement lamp.

[0008] Further, the thin end of the wire harness guide horn is fixedly connected with a plurality of straight wire harness guide springs extending linearly along the axial direction; the plurality of straight wire harness guide springs are distributed in a circumferential array along the axis of the wire harness guide horn; and the plurality of straight wire harness guide springs are combined into a wire harness guide cylinder coaxial with the wire harness guide horn.

[0009] Further, when the measured wire harness is inserted into the wire harness guide cylinder along the length, there is a gap between the outer wall surface of the measured wire harness and the wire harness guide cylinder.

[0010] Further, the straight guide channels in the wire harness guide cylinder are connected with the thin end of the wire harness guide horn; the straight gaps are formed between any adjacent straight wire harness guide strips on the wire harness guide cylinder; the wire harness end part constraint unit is at the end of the wire harness guide cylinder away from the wire harness guide horn.

[0011] Further, the wire harness end part constraint unit comprises a plurality of conical petals in a circumferential array distribution, the roots of the plurality of conical petals are fixedly connected with the outer wall surfaces of the plurality of straight wire harness guide strips one by one; the outer wall surfaces of the plurality of conical petals are combined into a conical surface with the thick end facing the wire harness guide horn;

[0012] The thin end of the conical surface combined by the outer wall surfaces of the plurality of conical petals is coaxially sleeved with a driving circular ring, and an annular gap is formed between the driving circular ring and the conical surface in the initial state;

[0013] Further, the wire harness end part constraint unit comprises a plurality of conical petals in a circumferential array distribution, the roots of the plurality of conical petals are fixedly connected with the outer wall surfaces of the plurality of straight wire harness guide strips one by one; the outer wall surfaces of the plurality of conical petals are combined into a conical surface with the thick end facing the wire harness guide horn;

[0014] Further, a section of the end of each straight wire harness guide strip is recorded as a strip end section, and each strip end section is located at the side of each conical petal away from the wire harness guide horn; the outer wall surface of each strip end section is linearly arrayed with a plurality of transmission tooth bodies in the length direction; each transmission tooth body on the outer wall surface of each strip end section is engaged with a follower gear, each follower gear is rotatably installed on a gear support through a bearing, and each gear support is fixedly connected with the driving circular ring; each follower gear is fixedly connected with a wire harness end part constraint arm curved toward the side of the axis of the wire harness guide horn away from the driving circular ring, and the end of each wire harness end part constraint arm is an end constraint head, and a plurality of end constraint heads are distributed in a circumferential array; in the initial state, the plurality of end constraint heads distributed in a circumferential array are located within the enclosed range of the end part contour of the wire harness guide cylinder.

[0015] Further, the driving ring gradually moves along the axial direction to approach the wire bundle guide horn, and each gear support with the follow-up gear follows the driving ring to translate, and each follow-up gear rotates along the axial line under the meshing effect during the process of following the driving ring to deviate, so that the wire bundle end part constraint arm connected to each gear swings to the side gradually deviating from the wire bundle guide cylinder axis, so that the end constraint head deviates from the enclosed range of the inner contour of the wire bundle guide cylinder end part; with the linear telescopic device driving the driving ring to continue to gradually move along the axial direction to approach the wire bundle guide horn, until the driving ring deviates along the axial direction to contact and press the conical surface, so that each conical surface outer wall surface is subjected to a component force towards the direction deviating from the wire bundle guide cylinder axis, which is transmitted to each linear wire bundle guide spring, so that the end position of each linear wire bundle guide spring is subjected to a component force towards the wire bundle guide cylinder axis, thereby synchronously elastically deforming the linear wire bundle guide spring, and the ends of the linear wire bundle guide spring move towards each other.

[0016] A concentric wire bundle, the cross section of the measured wire bundle at least includes a central wire core and an insulating skin surrounding the central wire core.

[0017] Beneficial effects: the application can ensure that the measured wire bundle can smoothly pass through the wire bundle guide cylinder with a large inner diameter along the length direction, and can make the lens completely centered to shoot the wire bundle end part of the measured wire bundle in the final shooting stage. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a schematic view of the best shooting angle state when the lens axis of the visual camera is coaxial with the axis of the circular outer contour of the measured wire bundle end part;

[0019] Figure 2 It is a schematic view of the pattern shot by the visual camera;

[0020] Figure 3 It is a schematic view of the focusing structure of the visual camera along the axial direction;

[0021] Figure 4 It is another angle schematic view; Figure 3

[0022] Figure 5 It is a schematic view of the overall structure of the scheme;

[0023] Figure 6 It is a side view of the wire bundle guide;

[0024] Figure 7 It is a perspective view of the wire bundle guide;

[0025] Figure 8 It is a sectional view of the wire bundle guide; ​

[0026] Figure 9 This is a disassembled diagram of the wire harness guide. Detailed Implementation

[0027] The invention will now be further described with reference to the accompanying drawings.

[0028] As attached Figures 1 to 9 The system shown is a concentricity detection system for concentric wire harnesses, such as... Figure 3 , 4 As shown, the system includes a camera focusing base 7 in a darkroom, a focusing slide rail 5 fixedly mounted on the camera focusing base 7, and a focusing slider 4 mounted on the focusing slide rail 5. Driven by a driving device, the focusing slider 4 moves linearly along the focusing slide rail 5. A CCD vision camera 3 is fixedly mounted on the focusing slider 4 via a support 3. A lens barrel 2 extending along the length of the focusing slide rail 5 is mounted at the front end of the CCD vision camera 3, and a lens 8 is located at the end of the lens barrel 2. A light-transmitting bracket 1 is fixedly mounted in front of the lens 8, and a light-transmitting hole 9 coaxial with the lens 8 is passed through the light-transmitting bracket 1. The light-transmitting hole 9 is located at... A ring-shaped fill light 10 is fixedly mounted coaxially on one side away from the lens 8. The ring-shaped fill light 10 has a ring-shaped light-emitting surface 10.1 on the side away from the lens 8. A wire harness guide 80 is provided on the side of the ring-shaped fill light 10 away from the lens 8. The wire harness guide 80 can guide the wire harness 12 to be tested along the axis of the lens barrel 2. A wire harness end constraint unit 11 is provided at one end of the wire harness guide 80 near the ring-shaped fill light 10. The end constraint unit 11 can position the end of the wire harness 12 to be tested and constrain the outer contour of the wire harness end 12a of the wire harness 12 to be coaxial with the axis of the lens 8.

[0029] like Figures 4 to 9 As shown, the wire harness guide 80 includes a cone-shaped wire harness guide horn 13, which is fixed by a bracket and whose axis is coaxial with the lens 8. The horn-shaped guide opening of the wire harness guide horn 13 is located on the side away from the ring-shaped fill light 10.

[0030] The thin end of the wire harness guide horn 13 is fixedly connected to several straight wire harness guide spring strips 14a extending in a straight line along the axial direction. The several straight wire harness guide spring strips 14a are arranged in a circular array along the axis of the wire harness guide horn 13. The several straight wire harness guide spring strips 14a are combined to form a wire harness guide cylinder 14 coaxial with the wire harness guide horn 13. In order to enable the wire harness 12 under test to pass smoothly through the wire harness guide cylinder 14, the following size is limited: when the wire harness 12 under test passes into the wire harness guide cylinder 14 along its length, there is a gap 102 between the outer wall surface of the wire harness 12 under test and the wire harness guide cylinder 14.

[0031] The straight guide channel in the wire harness guide cylinder 14 is connected with the thin end of the wire harness guide horn 13; the straight gaps 15 are formed between any adjacent straight wire harness guide strips 14a on the wire harness guide cylinder 14; the wire harness end constraint unit 11 is at the end of the wire harness guide cylinder 14 away from the wire harness guide horn 13.

[0032] The wire harness end constraint unit 11 comprises a plurality of conical petals 17 arranged in a circumferential array, the roots of the plurality of conical petals 17 are fixedly connected with the outer wall surfaces of the plurality of straight wire harness guide strips 14a one by one; the outer wall surfaces of the plurality of conical petals 17 are combined into a conical surface 17a with a thick end facing the wire harness guide horn 13; the thin end of the conical surface 17a combined by the outer wall surfaces of the plurality of conical petals 17 is coaxially sleeved with a driving circular ring 21, and an annular gap 110 is formed between the driving circular ring 21 and the conical surface 17a in the initial state; the wire harness end constraint unit 11 further comprises a pair of straight linear extenders 19 parallel to the wire harness guide cylinder 14, the housings of the straight linear extenders 19 are fixedly connected with the wire harness guide horn 13 through the extender supports 16; the straight linear extenders 19 can drive the driving circular ring 21 to displace along the axial direction.

[0033] A section of the end of each straight wire harness guide strip 14a is denoted as a strip end section 14aa, and each strip end section 14aa is located at the side of each conical petal 17 away from the wire harness guide horn 13; the outer wall surface of each strip end section 14aa is linearly arranged with a plurality of transmission tooth bodies 18 along the length direction; each transmission tooth body 18 on the outer wall surface of each strip end section 14aa is engaged with a follower gear 23, each follower gear 23 is rotatably installed on a gear support 22 through a bearing, and each gear support 22 is fixedly connected with the driving circular ring 21; each follower gear 23 is fixedly connected with a wire harness end constraint arm 24 curved toward the side of the axis of the wire harness guide horn 13 at the side away from the driving circular ring 21, and the end of each wire harness end constraint arm 24 is an end constraint head 25, and a plurality of end constraint heads 25 are arranged in a circumferential array; for example Figure 6 and 7 In the initial state, the plurality of end constraint heads 25 arranged in a circumferential array are all located within the enclosed range of the inner contour of the end of the wire harness guide cylinder 14.

[0034] The cross section of the measured wire harness 12 in the scheme at least comprises a central core and an insulating skin surrounding the central core.

[0035] Working principle and working method: step one, in the initial state, an annular gap 110 is formed between the driving circular ring 21 and the conical surface 17a in the initial state; each straight wire harness guide strip 14a spontaneously assumes a straight line shape;

[0036] Step two, a measured wire harness 12 is inserted into the wire harness guide horn 13 along the general axial direction of the wire harness guide horn 13, the end of the measured wire harness 12 is guided by the inner conical surface of the wire harness guide horn 13 and enters the wire harness guide cylinder 14, when the measured wire harness 12 enters the wire harness guide cylinder 14, there is a gap 102 between the outer wall surface of the measured wire harness 12 and the wire harness guide cylinder 14, the gap is between 0.5mm and 1mm, so the measured wire harness 12 can smoothly pass through the wire harness guide cylinder 14 in the length direction, then continue to push the measured wire harness 12 along the axial direction of the wire harness guide cylinder 14, until the wire harness end 12a of the measured wire harness 12 contacts the several end constraint heads 25, the measured wire harness 12 cannot continue to be pushed along the axial direction under the joint constraint of the several end constraint heads 25; so as to realize the positioning of the axial direction of the measured wire harness 12; at this time, the several end constraint heads 25 block the line of sight of the lens 8, so that the lens 8 cannot shoot the complete pattern of the end surface of the wire harness end 12a of the measured wire harness 12, and because there is a gap 102 between the outer wall surface of the measured wire harness 12 and the wire harness guide cylinder 14, the measured wire harness 12 and the wire harness guide cylinder 14 are not coaxial, so the axial line of the outer contour of the wire harness end 12a of the measured wire harness 12 at this time does not completely coincide with the axial line of the lens 8;

[0037] Step three, the linear extender 19 drives the driving ring 21 to move along the axial direction and gradually approach the wire harness guide horn 13, under the displacement of the driving ring 21, each gear support 22 carries the follow-up gear 23 and translates with the driving ring 21, in the process of the follow-up gear 23 following the displacement of the driving ring 21, each follow-up gear 23 rotates along its own axial line under the meshing action, so that the wire harness end constraint arm 24 connected to each gear 23 swings to the side gradually deviating from the axial line of the wire harness guide cylinder 14, so that the several end constraint heads 25 are all deviated from the enclosed range of the inner contour of the end of the wire harness guide cylinder 14, at this time, the lens 8 can shoot the complete pattern of the end surface of the wire harness end 12a of the measured wire harness 12, but the axial line of the outer contour of the wire harness end 12a of the measured wire harness 12 at this time does not completely coincide with the axial line of the lens 8;

[0038] With the linear telescopic device 19 driving the driving ring 21 to continue to move along the axis direction and gradually approach the bundle guide horn 13, until the driving ring 21 is offset to contact and press the conical surface 17a along the axis direction, the outer wall surface of each conical surface lobe 17 is subjected to a component force towards the axis direction of the bundle guide cylinder 14, which is transmitted to each linear bundle guide spring 14a, so that the end position of each linear bundle guide spring 14a is subjected to a component force towards the axis direction of the bundle guide cylinder 14, thereby synchronously elastically deforming the linear bundle guide springs 14a, and the ends of the linear bundle guide springs 14a make a gathering action of approaching each other, and further make the bundle end portion 12a of the measured bundle 12 under the common gathering constraint of the ends of the linear bundle guide springs 14a, the outer contour axis of the bundle end portion 12a of the measured bundle 12 coincides with the axis of the lens 8, at this time, since the elastic deformation amount of the linear bundle guide springs 14a is relatively small, the maximum deformation displacement is only between 0.5mm and 1mm, and the offset amount between the transmission gear body 18 of the outer wall surface of the end segment 14aa and the corresponding follow-up gear 23 is insufficient to change the meshing relationship therebetween.

[0039] Further make the lens 8 completely centered to shoot the bundle end portion 12a of the measured bundle 12; at this time, if the wire core of the bundle end portion 12a of the measured bundle 12 is not on the center of the circular contour of the bundle end portion 12a, it is determined that the concentricity detection of the bundle is unqualified, otherwise it is qualified.

[0040] Step four, the linear telescopic device 19 drives the driving ring 21 to move along the axis direction and gradually away from the bundle guide horn 13, until the initial state of "step one", when the linear bundle guide springs 14a on the bundle guide cylinder 14 and the plurality of end constraint heads 25 automatically recover to the linear state in the initial state, at this time, the measured bundle 12 is released, and the measured bundle 12 can be taken out by pulling back the measured bundle 12.

[0041] The above is only the preferred embodiment of the present application, it should be pointed out that: for ordinary skilled in the art, without departing from the principles of the present application, can make a number of improvements and refinements, these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. A concentricity detection system for concentric wire harnesses, characterized in that: Including lens (8), the front of lens (8) is provided with fixedly provided with light transmission support (1), the light transmission support (1) is provided with light transmission hole (9) coaxial with lens (8) through, the side of light transmission hole (9) away from lens (8) is fixedly installed with annular light supplement lamp (10) coaxial; The side of annular light supplement lamp (10) away from lens (8) is provided with wire harness guide (80), the wire harness guide (80) can guide the wire harness (12) along the axis direction of lens barrel (2), the wire harness guide (80) is provided with wire harness end constraint unit (11) at the end close to annular light supplement lamp (10), the end constraint unit (11) can position the end of wire harness (12), and the wire harness end (12a) of wire harness (12) is constrained to be coaxial with the axis of lens (8); The wire harness guide (80) includes conical wire harness guide horn (13), the wire harness guide horn (13) is fixed by support and the axis is coaxial with lens (8), and the horn-shaped guide port of wire harness guide horn (13) is located at the side away from annular light supplement lamp (10); The thin end of wire harness guide horn (13) is fixedly connected with a plurality of straight wire harness guide spring strips (14a) extending linearly along the axis direction, a plurality of straight wire harness guide spring strips (14a) are distributed in circumferential array along the axis of wire harness guide horn (13), and a plurality of straight wire harness guide spring strips (14a) are combined into wire harness guide cylinder (14) coaxial with wire harness guide horn (13); Wire harness end constraint unit (11) includes a plurality of circumferentially distributed conical petals (17), the root of a plurality of conical petals (17) is fixedly connected with the outer wall surface of a plurality of straight wire harness guide spring strips (14a) one by one;The outer wall surface of a plurality of conical petals (17) is combined into conical surface (17a) with thick end towards wire harness guide horn (13);The thin end of the conical surface (17a) coaxially sleeved with driving ring (21) is formed between driving ring (21) and conical surface (17a) in initial state;Linear extender (19) can drive driving ring (21) to displace along the axis direction; A section of each linear wire bundle guide spring (14a) at the end of the wire bundle guide barrel (14) is referred to as a wire bundle guide spring end section (14aa), each wire bundle guide spring end section (14aa) is located on the side of each conical lobe (17) away from the wire bundle guide horn (13); the outer wall surface of each wire bundle guide spring end section (14aa) is linearly arrayed with a plurality of transmission tooth bodies (18) along the length direction; each wire bundle guide spring end section (14aa) is engaged with a follower gear (23) on the transmission tooth body (18) of the outer wall surface thereof; each follower gear (23) is rotatably mounted on a gear support (22) through a bearing, and each gear support (22) is fixedly connected with a driving circular ring (21); each follower gear (23) is fixedly connected with a wire bundle end portion restraining arm (24) that is curved towards the side of the axis of the wire bundle guide horn (13) away from the driving circular ring (21), and the end of each wire bundle end portion restraining arm (24) is an end restraining head (25), and a plurality of end restraining heads (25) are circumferentially arrayed; in the initial state, the circumferentially arrayed plurality of end restraining heads (25) are located within the enclosed range of the inner contour of the end portion of the wire bundle guide barrel (14).

2. A system for detecting the concentricity of a bundle of concentric wires as claimed in claim 1, characterized in that: When the measured wire bundle (12) penetrates into the wire bundle guide barrel (14) along the length direction, there is a gap (102) between the outer wall surface of the measured wire bundle (12) and the wire bundle guide barrel (14).

3. A system for detecting the concentricity of a bundle of concentric wires as claimed in claim 2, wherein: The linear guide channel in the wire bundle guide barrel (14) is connected with the thin end of the wire bundle guide horn (13); a linear gap (15) is formed between any adjacent linear wire bundle guide springs (14a) on the wire bundle guide barrel (14); and the wire bundle end portion restraining unit (11) is located at the end of the wire bundle guide barrel (14) away from the wire bundle guide horn (13).

4. The system for detecting the concentricity of a bundle of concentric wires according to claim 3, wherein: The driving ring (21) gradually moves close to the wire bundle guide horn (13) along the axial direction. With the displacement of the driving ring (21), each gear support (22) with a follow-up gear (23) translates along with the driving ring (21). In the process of the follow-up gear (23) deviating from the driving ring (21), each follow-up gear (23) rotates along its own axis under the meshing action, so that the wire bundle end constraint arm (24) connected to each gear (23) swings towards the side gradually deviating from the axis of the wire bundle guide cylinder (14), so that the several end constraint heads (25) are all deviated from the enclosed range of the inner contour of the end part of the wire bundle guide cylinder (14); with the linear extender (19) driving the driving ring (21) to continue to gradually move close to the wire bundle guide horn (13) along the axial direction, until the driving ring (21) deviates along the axial direction to contact and press the conical surface (17a), the outer wall surface of each conical surface lobe (17) is subjected to a component force towards the direction deviating from the axis of the wire bundle guide cylinder (14), which is transmitted to each linear wire bundle guide spring (14a), so that the end position of each linear wire bundle guide spring (14a) is subjected to a component force towards the axis of the wire bundle guide cylinder (14), thereby synchronously elastically deforming the several linear wire bundle guide springs (14a), and the ends of the several linear wire bundle guide springs (14a) move close to each other.

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