Wire harness device of vehicle sliding door

Abstract

The utility model discloses a wire harness device of a vehicle sliding door. The wire harness device comprises a drag chain assembly, a vehicle body fixing mechanism and a vehicle door fixing mechanism. The drag chain assembly comprises a corrugated pipe connected between the vehicle body fixing mechanism and the vehicle door fixing mechanism, and a supporting framework used for providing structural supporting is arranged in the corrugated pipe. The vehicle body and the vehicle door are connected through the drag chain assembly (the corrugated pipe and the supporting framework), the problem that a traditional wire harness is prone to abrasion, bending and fatigue in the sliding door movement process is solved, a complete wire harness protection system from the vehicle body to the vehicle door is formed, and the safety of the wire harness in the sliding door opening and closing process is guaranteed; the corrugated pipe provides external flexible protection and adapts to the motion trail of the door body; the supporting framework provides structural strength, the corrugated pipe is prevented from losing efficacy in repeated bending, and it is guaranteed that the wire harness is not prone to deformation or breakage when the automobile door slides repeatedly.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of sliding door wire harness, especially to a wire harness device of vehicle sliding door. BACKGROUND

[0002] With the rapid development of automobile industry, sliding door is increasingly applied in commercial vehicles, MPV and other models due to its advantages of convenient opening, high space utilization rate and the like. The sliding door needs to slide along the guide rail during opening and closing, which requires the wire harness connecting the vehicle body and the door to have good flexibility and durability.

[0003] In the prior art, the wire harness of the vehicle sliding door is usually protected by a simple corrugated tube, but the following problems exist in actual use: improper bending radius control: lacking effective bending radius control mechanism, the wire harness is easily damaged when excessively bent, affecting the normal operation of electrical equipment; risk of reverse bending: when the sliding door is impacted by external force or abnormally operated, the wire harness may be reversely bent, causing internal wires to break; limited fatigue life: frequent opening and closing actions cause the corrugated tube to fatigue and fail, the protection effect decreases, and the wire harness is exposed to the external environment; insufficient support: the strength of the corrugated tube is limited, and the corrugated tube is easily collapsed or deformed during long-term use, affecting the normal running of the wire harness; complex installation: the existing products often have complex structures, making installation and debugging difficult, increasing production cost and maintenance difficulty.

[0004] Therefore, it is necessary to develop a vehicle sliding door wire harness device with reasonable structure, reliable protection and long service life. UTILITY MODEL CONTENTS

[0005] (I) Technical problem to be solved

[0006] The utility model solves the technical problem to provide a wire harness device of vehicle sliding door, through the drag chain assembly (corrugated tube and support framework) connection vehicle body and door, solve the traditional wire harness in the sliding door movement easy to wear, the problem of bending fatigue, form the complete wire harness protection system of vehicle body to door, ensure the safety of wire harness in the opening and closing process of sliding door;The corrugated tube provides external flexible protection and adapts to the door body movement track;The support framework provides structural strength, prevents the corrugated tube from failing in repeated bending, and ensures that the wire harness is not easily deformed or broken when the door repeatedly slides.

[0007] (II) Technical scheme

[0008] The utility model solves the above technical problem by adopting a wire harness device of vehicle sliding door, which comprises a drag chain assembly, a vehicle body fixing mechanism and a door fixing mechanism;The drag chain assembly comprises a corrugated tube connected between the vehicle body fixing mechanism and the door fixing mechanism, and the corrugated tube is provided with a support framework for providing structural support.

[0009] Specifically, the bellows is made of thermoplastic elastomer material, has waterproof, dustproof and temperature-resistant performance; and the bellows can make the wire harness device adapt to the complex three-dimensional motion trajectory of the sliding door, keep the structure intact during horizontal sliding, have no stress concentration during vertical deviation, and keep smooth movement during angle deviation.

[0010] By adopting the above scheme, the wire harness protection system from the vehicle body to the vehicle door is formed by connecting the vehicle body and the vehicle door through the drag chain assembly (the bellows and the support framework), so as to solve the problem of easy wear and fatigue bending of the traditional wire harness during the movement of the sliding door, and ensure the safety of the wire harness during the opening and closing of the sliding door. The bellows provides external flexible protection to adapt to the door body motion trajectory, and the support framework provides structural strength to prevent the bellows from failing during repeated bending, and to ensure that the wire harness is not easy to deform or break during repeated sliding of the vehicle door.

[0011] In some embodiments, the support framework includes a main body portion arranged along the length direction of the bellows, and a plurality of framework units arranged on both ends of the main body portion, and the plurality of framework units are arranged in sequence along the length direction of the main body portion; and each two adjacent framework units are arranged at intervals.

[0012] Specifically, the cross section of the support framework is U-shaped, and the inner wall surface of the main body portion and the framework units is smooth, so as to avoid causing wear to the insulation layer of the wire harness.

[0013] By adopting the above scheme, the main body portion provides continuity, the framework units provide key support points, the segmented framework unit design reduces the weight while maintaining the support strength; the interval arrangement of the framework units increases the bending flexibility of the bellows, and adapts to the multi-directional movement of the vehicle door; the framework units control the bending radius to prevent excessive bending from damaging the wire harness.

[0014] In some embodiments, a passing space for the wire harness is formed between the main body portion and the plurality of framework units arranged on both ends thereof.

[0015] By adopting the above scheme, a special channel is provided for the wire harness to avoid interference with the support structure; the arrangement space of the wire harness is clear to prevent the wire harness from being damaged by friction with the support framework.

[0016] In some embodiments, a plurality of grooves are arranged at intervals in the support framework in the passing space, the grooves include a first segment and a second segment; the first segments are the same in size and are formed on the main body portion and part of the framework units, and the two ends of the first segment arranged on the framework units are expanded outward along the length direction of the bellows to form the second segments, so that the size of the second segment gradually increases outward from the part connected with the first segment.

[0017] Adopting the above scheme, the groove segmentation design can guide the wire harness to naturally transition and avoid stress concentration caused by bending; the second segment outward expansion structure provides additional buffer space when the door slides, protects the wire harness, and can adapt to the space requirement in different bending states.

[0018] In some embodiments, the skeleton unit is arranged vertically relative to the main body part.

[0019] Adopting the above scheme, the vertical skeleton unit enhances the radial support force and prevents the bellows from collapsing laterally.

[0020] In some embodiments, the skeleton unit includes a connecting part connected to the main body part, and a limiting part connected to one end of the connecting part away from the main body part; wherein the limiting part is arranged in extension relative to both ends of the connecting part along the length direction of the bellows; and every two adjacent limiting parts are arranged in interval to avoid motion interference.

[0021] In some embodiments, the connecting part is formed outwardly and upwardly relative to one end thereof connected to the main body part, the cross section of the connecting part is arc-shaped structure, and the limiting part is formed vertically and upwardly relative to one end of the connecting part away from the main body part.

[0022] Adopting the above scheme, the arc-shaped connecting part and the vertical limiting part realize smooth bending guidance and reduce sliding resistance; and the arc-shaped cross section avoids stress concentration points, can adapt to the arc-shaped trajectory when the door is opened, and reduces the fatigue risk of the support skeleton.

[0023] In some embodiments, the support skeleton is made of elastic material, so that the support skeleton has two limit states.

[0024] One is a forward bending state, in which the support skeleton is bent forward by 180°, so that deformation joints are formed between adjacent skeleton units;

[0025] The other is a straightening state, in which the support skeleton is bent backward to abut adjacent skeleton units, so that the support skeleton has a backward bending prevention function; and the support skeleton forms a straight line area and a rear buffer area, and the included angle between the two ends of the skeleton unit in the straight line area is 0°; the included angle between the two ends of the skeleton unit in the rear buffer area is 17°.

[0026] In some embodiments, the maximum opening width of the deformation joint is 5-15mm, which ensures that the skeleton units do not collide when the support skeleton is bent forward by 180°; and the bending fatigue life of the support skeleton is not less than 100,000 cycles.

[0027] Adopting the above scheme, the elastic material and the two limit states (180° front bending and rear bending limitation) ensure smooth opening and closing of the vehicle door and prevent excessive rear bending; the 180° front bending meets the large opening angle requirement of the sliding door; the rear bending prevention function protects the wire harness from reverse damage; the linear zone (0° angle) and the rear buffer zone (17° angle) are designed to optimize the bending performance, avoiding damage to the wire harness due to sharp bending.

[0028] In some embodiments, a plurality of recesses are arranged on the outer wall of the framework unit.

[0029] Adopting the above scheme, the recesses reduce the weight; at the same time, the contact friction between the bellows and the supporting framework is increased to prevent relative sliding.

[0030] In some embodiments, a fixing structure is arranged at any one end of the supporting framework along the length direction of the supporting framework, and the fixing structure can be matched with one end of the bellows to fix, thereby ensuring firm connection between the supporting framework and the bellows.

[0031] (Three) beneficial effects

[0032] Compared with the prior art, the utility model discloses a wire harness device of vehicle sliding door,

[0033] (1) the utility model discloses a drag chain assembly (bellows and supporting framework) is connected with the vehicle body and the door, solves the problem that the traditional wire harness is easy to wear and tear and fatigue in the movement of the sliding door, forms the wire harness protection system of complete vehicle body to door, ensures the safety of wire harness during the opening and closing of the sliding door, and the bellows provides external flexible protection and adapts to the door body movement track, and the supporting framework provides structural strength and prevents the bellows from failing in repeated bending, and ensures that the wire harness is not easy to deform or break when the door repeatedly slides.

[0034] (2) the main part of the utility model provides continuity, and the framework unit provides key support points, and the sectional framework unit design reduces the weight while maintaining the supporting strength, and the interval arrangement of the framework unit increases the bending flexibility of the bellows and adapts to the multi-directional movement of the door, and the framework unit controls the bending radius and prevents the wire harness from being damaged by excessive bending.

[0035] (3) the utility model discloses a special channel for the wire harness, avoiding interference with the supporting structure, and the wire harness arrangement space is clear, preventing the wire harness from being damaged by friction with the supporting framework.

[0036] (4) the utility model discloses a smooth bending guide through the arc-shaped connecting part and the vertical limiting part, reducing the sliding resistance, and the arc-shaped cross section avoids stress concentration points, can adapt to the arc-shaped track when the door is opened, and reduces the fatigue risk of the supporting framework.

[0037] (5)The utility model discloses through elastic material and two kinds of extreme state (before bending 180 ° / after bending is limited) ensure that the door opens and closes smoothly and prevents excessive after bending, and 180 ° before bending satisfies the big opening angle requirement of sliding door, and the function of preventing after bending protects wire harness from reverse damage, and linear area (0 ° included angle) and after buffer area (17 ° included angle) partition design optimize bending performance, avoid sharp bending damage wire harness. BRIEF DESCRIPTION OF DRAWINGS

[0038] In order to more clearly illustrate the technical scheme of the embodiment of the present application, the drawings needed in the embodiment will be briefly introduced as follows, obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained according to these drawings without creative labor for the ordinary skilled in the art.

[0039] Figure 1 It is a structure schematic view of the wire harness device of the sliding door for vehicle of the utility model,

[0040] Figure 2 It is a structure schematic view of the support framework in the state of bending 180 ° forward of the utility model,

[0041] Figure 3 It is Figure 2 The section view at A-A in Fig.

[0042] Figure 4 It is Figure 2 The enlarged schematic view at B in Fig.

[0043] Figure 5 It is another angle structure schematic view of the support framework in the state of bending 180 ° forward of the utility model,

[0044] Figure 6 It is Figure 5 The enlarged schematic view at C in Fig.

[0045] Figure 7 It is a structure schematic view of the support framework in the state of straightening of the utility model.

[0046] The corresponding component name of each reference sign in the figure is: 100, drag chain assembly, 101, bellows, 102, support framework, 1021, main body part, 1022, framework unit, 1022a, connecting part, 1022b, limiting part, 1022c, recessed part, 1023, through space, 1024, groove, 1024a, first section, 1024b, second section, 1025, deformation joint, 1026, linear area, 1027, after buffer area, 1028, fixed structure, 200, vehicle body fixing mechanism, 300, door fixing mechanism. DETAILED DESCRIPTION

[0047] The specific embodiments of the present application will be further described in details in conjunction with the drawings and examples. The following examples are used to illustrate the present application, but cannot be used to limit the scope of the present application.

[0048] In the description of the present application, it should be noted that unless specifically defined and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or the communication between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0049] The embodiments of the present application are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the disclosure. Obviously, the described embodiments are only a part of the embodiments of the present application, not all. The present application can also be implemented or applied by other different specific embodiments, and the details in the specification can be modified or changed based on different views and applications without departing from the spirit of the present application. It should be noted that the following examples and features in the examples can be combined with each other without conflict. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0050] It should be noted that the various aspects of the embodiments described below are within the scope of the appended claims. It should be apparent that the aspects described herein can be embodied in a wide variety of forms and that any specific structure and / or function described herein is merely illustrative. Based on the teachings provided herein one skilled in the art should appreciate that an aspect described herein can be implemented independently of any other aspects and that an aspect can be implemented both as any number of software and / or hardware configurations and that the examples described herein are not the only way to implement such aspects. For example, an item or article of manufacture can comprise any one or combination of systems and / or methods.

[0051] It should also be noted that the drawings provided in the following examples are only schematic and that the drawings only show components that are related to the application, and are not drawn to scale, and that the actual implementation of the application can be different from the drawings, and the shapes, numbers, and ratios of the components in the drawings can be arbitrarily changed, and the layout of the components can be more complex.

[0052] Additionally, specific details are provided in the following description to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that practice can be carried out without these specific details.

[0053] The technical solutions provided by the various embodiments of this application are described below with reference to the accompanying drawings.

[0054] like Figures 1-7 As shown, this utility model provides a wiring harness device for a vehicle sliding door, including a cable chain assembly 100, a vehicle body fixing mechanism 200, and a door fixing mechanism 300. The cable chain assembly 100 includes a corrugated pipe 101 connected between the vehicle body fixing mechanism 200 and the door fixing mechanism 300. A support frame 102 for providing structural support is provided inside the corrugated pipe 101. Specifically, the corrugated pipe 101 is made of thermoplastic elastomer material, which has waterproof, dustproof, and temperature-resistant properties. Furthermore, the corrugated pipe 101 enables the wiring harness device to adapt to the complex three-dimensional movement trajectory of the sliding door, maintain structural integrity during horizontal sliding, avoid stress concentration during vertical offset, and maintain smooth movement during angular deflection. By adopting the above solution, the vehicle body and the door are connected by the cable chain assembly 100 (corrugated pipe 101 and support frame 102), which solves the problem of wear and bending fatigue of traditional wiring harnesses during the movement of sliding doors. This forms a complete wiring harness protection system from the vehicle body to the door, ensuring the safety of the wiring harness during the opening and closing of the sliding door. The corrugated pipe 101 provides external flexible protection and adapts to the movement trajectory of the door. The support frame 102 provides structural strength to prevent the corrugated pipe 101 from failing during repeated bending, ensuring that the wiring harness is not easily deformed or broken when the door slides repeatedly.

[0055] In some embodiments, the support framework 102 comprises a main body portion 1021 arranged along the length direction of the bellows 101, and a plurality of framework units 1022 arranged at both ends of the main body portion 1021, the plurality of framework units 1022 being arranged in sequence along the length direction of the main body portion 1021, and each two adjacent framework units 1022 being arranged at intervals. Specifically, the cross section of the support framework 102 is in the shape of a U, and the inner wall surface of the main body portion 1021 and the framework units 1022 is smooth, avoiding abrasion to the insulation layer of the wire harness. With the above scheme, the main body portion 1021 provides continuity, the framework units 1022 provide key support points, the segmented framework units 1022 design reduces weight while maintaining support strength; the interval arrangement of the framework units 1022 increases the bending flexibility of the bellows 101, adapting to multi-directional movement of the vehicle door; the framework units 1022 control the bending radius, preventing excessive bending damage to the wire harness. In some embodiments, the main body portion 1021 and the plurality of framework units 1022 arranged at both ends thereof form a passing space 1023 for the wire harness (not shown in the figure) to pass through. With the above scheme, a special channel is provided for the wire harness, avoiding interference with the support structure; the arrangement space of the wire harness is clear, preventing abrasion damage to the wire harness by the support framework 102.

[0056] In some embodiments, the support framework 102 is arranged at intervals in the passing space 1023 and comprises a plurality of grooves 1024, the grooves 1024 comprising a first segment 1024a and a second segment 1024b; the first segments 1024a are of the same size and are formed on the main body portion 1021 and part of the framework units 1022, and the two ends of the first segments 1024a on the framework units 1022 are outwardly expanded along the length direction of the bellows 101 to form the second segments 1024b, so that the size of the second segments 1024b gradually increases outward from the part connected with the first segments 1024a. With the above scheme, the segmented design of the grooves 1024 can guide the natural transition of the wire harness, avoiding stress concentration caused by bending; the outward expansion structure of the second segments 1024b provides additional buffer space when the vehicle door slides, protecting the wire harness and adapting to the space requirement in different bending states.

[0057] In some embodiments, the skeleton units 1022 are arranged vertically relative to the main body part 1021. With the above scheme, the vertical skeleton units 1022 enhance the radial support force and prevent the corrugated pipe 101 from collapsing laterally. In some embodiments, the skeleton unit 1022 comprises a connecting part 1022a connected to the main body part 1021, and a limiting part 1022b connected to one end of the connecting part 1022a away from the main body part 1021; wherein the limiting part 1022b is arranged to extend relative to both ends of the connecting part 1022a along the length direction of the corrugated pipe 101, thereby increasing the contact area for better covering the wire harness; and every two adjacent limiting parts 1022b are arranged at intervals to avoid motion interference. In some embodiments, the connecting part 1022a is formed to be inclined outwardly upward from the end connected to the main body part 1021, and the cross section of the connecting part 1022a is arc-shaped, and the limiting part 1022b is formed to be vertical upward from the end of the connecting part 1022a away from the main body part 1021. With the above scheme, the arc-shaped connecting part 1022a and the vertical limiting part 1022b realize smooth bending guidance and reduce sliding resistance; and the arc-shaped cross section avoids stress concentration points, can adapt to the arc trajectory when the door is opened, and reduces the fatigue risk of the support skeleton 102.

[0058] In some embodiments, the support skeleton 102 is made of elastic material, so that the support skeleton 102 has two limit states; one is a forward bending state, in which the support skeleton 102 is bent forward by 180°, so that deformation joints 1025 are formed between adjacent skeleton units 1022; the other is a straightening state, in which the support skeleton 102 is bent backward until the adjacent skeleton units 1022 abut, so that the support skeleton 102 has a rear bending prevention function; and the support skeleton 102 forms a straight line area 1026 and a rear buffer area 1027, and the included angle between the two ends of the skeleton unit 1022 in the straight line area 1026 is 0°; the included angle between the two ends of the skeleton unit 1022 in the rear buffer area 1027 is 17°. In some embodiments, the maximum opening width of the deformation joint 1025 is 5-15 mm, which ensures that the skeleton units do not collide when the support skeleton 102 is bent forward by 180°; and the bending fatigue life of the support skeleton 102 is not less than 100,000 cycles. With the above scheme, the elastic material and the two limit states (forward bending 180° / rear bending limited) ensure smooth opening and closing of the door and prevent excessive rear bending; the 180° forward bending meets the large opening angle requirement of the sliding door; the rear bending prevention function protects the wire harness from reverse damage; and the straight line area 1026 (0° included angle) and the rear buffer area 1027 (17° included angle) are designed to optimize the bending performance and avoid damaging the wire harness in sharp bends.

[0059] In some embodiments, the outer wall of the support framework 102 is provided with a plurality of recesses 1022c. With the above-mentioned arrangement, the recesses 1022c reduce the weight; at the same time, the contact friction between the bellows 101 and the support framework 102 can be increased to prevent relative sliding. In some embodiments, the support framework 102 is provided with a fixing structure 1028 at any one end along the length direction thereof, which can be fixed with one end of the bellows 101 to ensure firm connection between the support framework 102 and the bellows 101.

[0060] The same or similar parts among various embodiments in the specification can be referred to each other, and each embodiment focuses on the difference from other embodiments.

[0061] The above merely illustrates the specific embodiments of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of the changes or replacements within the technical scope disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A wiring harness device for a vehicle sliding door, characterized in that: It includes a cable chain assembly (100), a vehicle body fixing mechanism (200), and a door fixing mechanism (300); the cable chain assembly (100) includes a corrugated pipe (101) connected between the vehicle body fixing mechanism (200) and the door fixing mechanism (300), and a support frame (102) for providing structural support is provided inside the corrugated pipe (101).

2. The wiring harness device for a vehicle sliding door according to claim 1, characterized in that: The support frame (102) includes a main body (1021) arranged along the length of the corrugated pipe (101) and a plurality of frame units (1022) disposed at both ends of the main body (1021). The plurality of frame units (1022) are arranged sequentially along the length of the main body (1021); and every two adjacent frame units (1022) are arranged at intervals.

3. The wiring harness device for a vehicle sliding door according to claim 2, characterized in that: A passage space (1023) for the wire harness to pass through is formed between the main body (1021) and a plurality of skeleton units (1022) located at both ends thereon.

4. The wiring harness device for a vehicle sliding door according to claim 3, characterized in that: The support frame (102) is located within the passage space (1023) and has a plurality of grooves (1024) spaced apart. Each groove (1024) includes a first segment (1024a) and a second segment (1024b). The first segment (1024a) has the same size and is formed on the main body (1021) and part of the frame unit (1022). The two ends of the first segment (1024a) on the frame unit (1022) expand outward along the length direction of the corrugated pipe (101) to form the second segment (1024b), so that the size of the second segment (1024b) gradually increases outward from the part connected to the first segment (1024a).

5. The wiring harness device for a vehicle sliding door according to claim 2, characterized in that: The skeleton unit (1022) is arranged vertically relative to the main body part (1021).

6. The wiring harness device for a vehicle sliding door according to claim 2, characterized in that: The skeleton unit (1022) includes a connecting portion (1022a) connected to the main body portion (1021) and a limiting portion (1022b) connected to one end of the connecting portion (1022a) away from the main body portion (1021); wherein the limiting portion (1022b) extends relative to both ends of the connecting portion (1022a) along the length direction of the corrugated pipe (101); and every two adjacent limiting portions (1022b) are spaced apart.

7. The wiring harness device for a vehicle sliding door according to claim 6, characterized in that: The connecting portion (1022a) is formed by its end connected to the main body portion (1021) and inclined outward and upward. The cross-section of the connecting portion (1022a) is an arc-shaped structure. The limiting portion (1022b) is formed by the end of the connecting portion (1022a) away from the main body portion (1021) and is formed vertically upward.

8. The wiring harness device for a vehicle sliding door according to claim 2, characterized in that: The support frame (102) is made of an elastic material so that the support frame (102) has two extreme states; One is the forward-bent state, in which the supporting frame (102) bends forward by 180° so that a deformation joint (1025) is formed between adjacent frame units (1022). The second is the straightened state. In this straightened state, the support frame (102) bends backward until it abuts against the adjacent frame unit (1022), so that the support frame (102) has an anti-bending function. The support frame (102) forms a straight area (1026) and a rear buffer area (1027). The included angle between the two ends of the frame unit (1022) in the straight area (1026) is 0°. The included angle between the two ends of the frame unit (1022) in the rear buffer area (1027) is 17°.

9. The wiring harness device for a vehicle sliding door according to claim 2, characterized in that: The outer wall of the skeleton unit (1022) is provided with a number of recesses (1022c).

10. The wiring harness device for a vehicle sliding door according to claim 2, characterized in that: The support frame (102) is provided with a fixing structure (1028) at any end along its length direction, and the fixing structure (1028) can be fixed in conjunction with one end of the corrugated pipe (101).

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