Wire harness fixing device and mounting structure

Abstract

The utility model relates to a wire harness fixing device and a mounting structure. The wire harness fixing device comprises a circular ring support, a rubber sleeve and a fixing cover. The rubber sleeve is sleeved on the circular ring support, the fixing cover is sleeved on the rubber sleeve, and the rubber sleeve and the fixing cover are provided with channels for wire harnesses to pass through. A first groove is formed in the rubber sleeve in the annular direction, and the first groove is matched with a first radial flange formed on the annular support in the annular direction in a clamped mode. The utility model further provides an installation structure of the wire harness fixing device, the installation structure comprises the wire harness fixing device and an automobile body metal plate, and the wire harness fixing device is assembled and fixed with the automobile body metal plate through a connecting piece. The rubber sleeve solves the problem that a common rubber sleeve is prone to single-side extrusion to cause sealing failure.

Description

Technical Field

[0001] The utility model relates to the technical field of wire harness assembly, in particular to a wire harness fixing device and an installation structure. Background Art

[0002] In automobile manufacturing, the fixing method of the rubber sleeve of the wiring harness through hole usually relies on the deformation and extrusion of the rubber sleeve itself to achieve sealing. However, the design of ordinary rubber sleeves has limitations. Especially when the wiring harness is too curved or the wiring harness is too short, it will cause the rubber sleeve to be subjected to excessive extrusion pressure on one side, resulting in sealing failure, which can easily cause problems such as water leakage and noise transmission. In addition, on the vehicle assembly line, ordinary rubber sleeves are often difficult to ensure stable assembly, which also affects their sealing performance.

[0003] In view of the above problems, CN216929451U discloses a vehicle wiring harness through-hole sheath, which includes a rubber sheath and a metal fixing bracket; an assembly body is integrally formed on the outer periphery of the rubber sheath, and the assembly body is embedded on the inner end face of the metal fixing bracket, and the side of the assembly body away from the metal fixing bracket is the vehicle body assembly surface; a rubber annular boss is provided on the vehicle body assembly surface, and mounting holes are provided above and below the vehicle body assembly surface; waist-shaped holes corresponding to the mounting holes are provided above and below the metal fixing bracket, and a metal bracket boss is provided on the inner end face of the metal fixing bracket; an annular card groove is provided on the rubber sheath to engage with the metal bracket boss. The vehicle wiring harness through-hole sheath is tightly fitted with the step surface of the vehicle body sheet metal hole by setting the rubber annular boss, and the vehicle body assembly surface is tightly fitted with the vehicle body to ensure the airtightness of the vehicle wiring harness through-hole sheath and the vehicle body sheet metal hole. The technical solution disclosed in the patent document is a beneficial attempt in the relevant technical field. Utility Model Content

[0004] In view of this, the purpose of the utility model is also to provide a wire harness fixing device and installation structure to solve the problem that ordinary rubber sleeves are easily squeezed on one side and cause sealing failure, and can also solve the problem that ordinary rubber sleeves are not firmly assembled.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0006] A wire harness fixing device comprises a circular ring bracket, a rubber sleeve and a fixing cover;

[0007] The rubber sleeve is sleeved on the annular bracket, the fixed cover is sleeved on the rubber sleeve, and the rubber sleeve and the fixed cover have a channel for the wire harness to pass through;

[0008] A first groove is formed circumferentially on the rubber sleeve, and the first groove is snap-fitted with a first radial flange formed circumferentially on the annular bracket.

[0009] According to the above technical means, a circular ring bracket is sleeved in the rubber sleeve, and a fixing cover is sleeved outside the rubber sleeve. When the wire harness fixing device is used to fix the wire harness, the wire harness fixing device is inserted into the wire harness through hole on the body sheet metal through which the wire harness passes, and the circular ring bracket is located on one side of the body sheet metal, and the rubber sleeve and the fixing cover are located on the other side of the body sheet metal. The three work together to effectively fix the wire harness and ensure the stability of the assembly of the wire harness fixing device and the body sheet metal. And by forming a first groove in an annular direction on the rubber sleeve, and forming a first radial flange in an annular direction on the circular ring bracket that is snap-fitted with the first groove. When the curvature of the wire harness is large or the size of the wire harness is short, the first radial flange is used to form radial support for the rubber sleeve, which effectively prevents the rubber sleeve from being subjected to excessive force on one side, resulting in local deformation, thereby ensuring the sealing performance of the wire harness fixing device. The problem that ordinary rubber sleeves are easily squeezed on one side and cause sealing failure is solved.

[0010] Preferably, a second groove is formed annularly on the rubber sleeve, and the second groove is snap-fitted with a second radial flange formed annularly on the fixed cover.

[0011] By forming a second groove circumferentially on the rubber sleeve and forming a second radial flange circumferentially on the fixed cover to engage with the second groove, radial support for the rubber sleeve is further achieved, thereby further effectively preventing the rubber sleeve from being subjected to excessive force on one side, resulting in local deformation, and further improving the sealing performance of the wiring harness fixing device.

[0012] Preferably, the rubber sleeve comprises a piercing head, a guide sleeve and a sealing body which are sequentially formed along the axial direction;

[0013] The first groove is formed in an annular direction on the inner side wall of the sealing body, and the second groove is formed in an annular direction on the outer side wall of the sealing body.

[0014] By skillfully arranging the rubber sleeve into a tying head, a guide sleeve and a sealing body which are sequentially formed along the axial direction, it is convenient for the wire harness to pass through and for the design and arrangement of the groove.

[0015] Preferably, a first axial sealing protrusion and a second axial sealing protrusion are formed at an end of the sealing body at intervals along the circumferential direction.

[0016] By forming the first axial sealing protrusion and the second axial sealing protrusion at intervals along the annular direction at the end of the sealing body, when the rubber sleeve contacts the plane of the body sheet metal, the first axial sealing protrusion and the second axial sealing protrusion are pressed and contacted with the plane of the body sheet metal at the same time, thereby forming a double sealing structure, effectively ensuring the sealing and waterproof performance.

[0017] Preferably, an annular flange is formed on the outer side wall of the piercing head.

[0018] By providing a circumferential flange on the outer side wall of the binding head, the friction resistance when the wire harness is wrapped is effectively increased, so that the wire harness is better fixed.

[0019] Preferably, the fixed cover comprises a cover body and a cover edge extending from the edge of the cover body, and a guide groove for the wire harness to pass through is radially formed on the upper edge of the cover edge.

[0020] By cleverly designing the fixed cover to include a cover body and a cover edge extending from the edge of the cover body, the cover body is used as a transition space for the bending of the wire harness, and the cover edge is used to constrain the direction of the wire harness and seal it. The constraint and sealing of the wire harness that needs to be bent are successfully achieved. It also has the advantages of simple structure and convenient assembly.

[0021] Preferably, the second radial flanges are formed at circumferential intervals along the inner cavity wall of the cover edge.

[0022] Preferably, an axial flange is formed in the circumferential direction on the inner cavity wall of the cover edge.

[0023] By forming an axial flange in the circumferential direction on the inner cavity wall of the cover edge, when the wiring harness fixing device is assembled with the body sheet metal, the axial flange can exert an axial pressing force on the rubber sleeve, thereby ensuring the tightness of the rubber sleeve and the body sheet metal.

[0024] Preferably, the edge of the cover is provided with a mounting point for assembly with a vehicle body sheet metal.

[0025] By arranging a mounting point for assembling with the body sheet metal on the edge of the cover, the stability of the assembly of the wiring harness fixing device with the body sheet metal is further ensured, thereby solving the problem of loose assembly of ordinary rubber sleeves.

[0026] Preferably, a through hole for fixing the wiring harness is provided on the groove wall of the guide groove.

[0027] By setting a through hole on the groove wall of the guide groove, after the wire harness passes through the guide groove, a small cable tie can be used to pass through the through hole to tie the wire harness and the fixing cover together, which further improves the stability of the wire harness assembly and avoids the wire harness shaking in the guide groove and generating abnormal noise.

[0028] Preferably, a notch is formed on the cover edge at a position corresponding to the second radial flange.

[0029] By forming a notch at a position on the cover edge corresponding to the second radial flange, demoulding of the second radial flange is facilitated.

[0030] Preferably, a limiting locking boss is provided on the outer side wall of the circular ring bracket.

[0031] By setting a limit locking boss on the outer wall of the ring bracket, one side of the body sheet metal is against the limit locking boss, and the other side is sealed with the rubber sleeve. The limit locking boss plays the role of axial limit, effectively realizing the stability and sealing of the wiring harness fixing device assembly, and preventing the rubber sleeve from falling out.

[0032] The utility model also provides an installation structure of a wire harness fixing device, comprising the wire harness fixing device of the utility model and a vehicle body sheet metal, wherein the wire harness fixing device is assembled and fixed to the vehicle body sheet metal via a connecting piece.

[0033] The wiring harness fixture is fixed to the body sheet metal assembly by using connectors, which facilitates disassembly, assembly and maintenance.

[0034] Beneficial effects of the utility model:

[0035] The wiring harness fixing device of the utility model cleverly combines the designs of the rubber sleeve, the circular ring bracket and the fixing cover. When fixing the wiring harness, the wiring harness fixing device can smoothly pass through the wiring harness through hole on the body sheet metal, ensuring that the circular ring bracket is tightly fitted to one side of the body sheet metal, and the rubber sleeve and the fixing cover are firmly fixed on the other side. The synergistic effect of the three not only effectively fixes the wiring harness, but also significantly improves the overall stability of the wiring harness fixing device and the body sheet metal assembly. In particular, the first groove on the rubber sleeve and the first radial flange on the circular ring bracket are cleverly matched. When the curvature of the wiring harness is large or the size is short, this design can provide the necessary radial support for the rubber sleeve, effectively avoiding the problem of local deformation caused by excessive force on one side. This not only maintains the sealing performance of the wiring harness fixing device, but also solves the problem that ordinary rubber sleeves are easily lost due to unilateral extrusion. And it has the advantages of simple structure, convenient assembly and low cost, and has promotion and application value in the field of wiring harness assembly technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a structural schematic diagram of the wire harness fixing device of the utility model;

[0037] Figure 2 It is a structural schematic diagram of the wire harness fixing device of the utility model from another angle;

[0038] Figure 3 for Figure 2 Sectional view along AA;

[0039] Figure 4 It is an exploded view of the wiring harness fixing device of the utility model;

[0040] Figure 5 is a structural schematic diagram of a fixed cover;

[0041] Figure 6It is a structural schematic diagram of the assembly of the wiring harness fixing device of the utility model with the body sheet metal;

[0042] Among them, 1-annular bracket, 11-first radial flange, 12-limit locking boss; 2-rubber sleeve, 21-first groove, 22-second groove, 23-tie head, 24-guide sleeve, 25-sealing body, 26-first axial sealing protrusion, 27-second axial sealing protrusion, 28-annular flange; 3-fixing cover, 31-second radial flange, 32-cover body, 33-cover edge, 34-guide groove, 35-axial flange, 36-installation point, 37-through hole, 38-notch; 4-body sheet metal; 5-connecting piece. DETAILED DESCRIPTION

[0043] The following will describe the implementation of the present invention with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are only for illustrating the present invention, not for limiting the scope of protection of the present invention.

[0044] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention, and thus the drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed at will, and the component layout may also be more complicated.

[0045] In the following description, numerous details are discussed to provide a more thorough explanation of the embodiments of the present application. However, it is obvious to those skilled in the art that the embodiments of the present application can be implemented without these specific details. Example

[0046] like Figures 1 to 6 As shown, a wire harness fixing device comprises a circular ring bracket 1, a rubber sleeve 2 and a fixing cover 3;

[0047] The rubber sleeve 2 is sleeved on the annular bracket 1, and the fixing cover 3 is sleeved on the rubber sleeve 2. The rubber sleeve 2 and the fixing cover 3 have a passage for the wire harness to pass through;

[0048] A first groove 21 is formed in an annular direction on the rubber sleeve 2 , and the first groove 21 is snap-fitted with a first radial flange 11 formed in an annular direction on the annular bracket 1 .

[0049] By sleeved a circular ring bracket inside a rubber sleeve, and sleeved a fixing cover outside the rubber sleeve, when the wire harness fixing device is used to fix the wire harness, the wire harness fixing device is inserted into the wire harness through hole on the body sheet metal, and the circular ring bracket is located on one side of the body sheet metal, and the rubber sleeve and the fixing cover are located on the other side of the body sheet metal. The three work together to fix the wire harness. The first groove formed circumferentially on the rubber sleeve is snap-fitted with the first radial flange formed circumferentially on the circular ring bracket. When the curvature of the wire harness is large or the size of the wire harness is short, the first radial flange is used to form radial support for the rubber sleeve, thereby preventing the rubber sleeve from being subjected to excessive force on one side, resulting in local deformation. The problem that ordinary rubber sleeves are easily squeezed on one side, resulting in sealing failure, is solved.

[0050] In some embodiments, since the annular bracket 1 and the fixed cover 3 are located on the outside and inside of the rubber sleeve 2, respectively. Therefore, a second groove 22 is also formed circumferentially on the rubber sleeve 2, so that the second groove 22 is engaged with the second radial flange 31 formed circumferentially on the fixed cover 3. In this way, the annular bracket 1 can form radial support for the rubber sleeve 2 on the inside, and the fixed cover 3 can form radial support for the rubber sleeve 2 on the outside. When the curvature of the wire harness is large or the size of the wire harness is short, the two work together to completely avoid the problem of excessive force on one side of the rubber sleeve, resulting in local deformation. The sealing performance of the wire harness fixing device is significantly improved, thereby ensuring the safety of the wire harness and extending the service life of the wire harness.

[0051] Exemplarily, the first radial flange 11 on the annular support 1 is located on the outer side of the end close to the fixed cover 3 .

[0052] In some embodiments, in order to facilitate the design layout of the wire harness and the groove, the rubber sleeve 2 is designed to include a piercing head 23, a guide sleeve 24 and a sealing body 25 formed in sequence along the axial direction;

[0053] A first groove 21 is formed in an annular direction on the inner wall of the sealing body 25 , and a second groove 22 is formed in an annular direction on the outer wall of the sealing body 25 .

[0054] In some embodiments, the piercing head 23, the guide sleeve 24 and the sealing body 25 are integrally formed.

[0055] In some embodiments, the tie head 23 is configured as a cylindrical tube to facilitate the passage of the wire harness and the containment of cement.

[0056] In some embodiments, the guide sleeve 24 is in a conical cylindrical structure, the small outer diameter end of the guide sleeve 24 is connected to the piercing head 23 , and the large outer diameter end is connected to the sealing body 25 .

[0057] In some embodiments, in order to ensure the sealing and waterproof performance of the wire harness fixing device, a first axial sealing protrusion 26 and a second axial sealing protrusion 27 are formed at the end of the sealing body 25 along the circumferential interval. When the wire harness fixing device fixes the wire harness, the first axial sealing protrusion 26 and the second axial sealing protrusion 27 are pressed and contacted with the plane of the body sheet metal at the same time, thereby forming a double sealing structure. The interval between the first axial sealing protrusion 26 and the second axial sealing protrusion 27 provides a deformation space for the compression of the first axial sealing protrusion 26 and the second axial sealing protrusion 27.

[0058] Exemplarily, the first axial sealing protrusion 26 is close to the center of the rubber sleeve 2 , and the second axial sealing protrusion 27 is far from the center of the rubber sleeve 2 .

[0059] In some embodiments, in order to increase the friction resistance when the wire harness is wrapped, so as to better fix the wire harness, an annular flange 28 is formed circumferentially on the outer side wall of the binding head 23 .

[0060] Exemplarily, the annular flange 28 formed on the outer side wall of the piercing head 23 is formed by extending radially on the outer side wall near the end of the piercing head 23 .

[0061] In some embodiments, for the wire harness that needs to be bent, and to ensure the firmness and sealing of the wire harness constraint, the fixed cover 3 is designed to include a cover body 32 and a cover edge 33 extending from the edge of the cover body 32, and a guide groove 34 for the wire harness to pass through is formed radially on the cover edge 33. Thus, the wire harness passing through the rubber cover 2 can be successfully turned in the fixed cover 3 and pass in or out from the notch of the guide groove 34. Since the bent part of the wire harness is more easily damaged than the straight part, the bent part of the wire harness is designed to be inside the cover body 32 to effectively protect the bent part of the wire harness.

[0062] Exemplarily, the opening of the guide groove 34 is in a semicircular shape.

[0063] In some embodiments, second radial flanges 31 are formed at circumferential intervals on the inner cavity wall of the cover edge 33 .

[0064] Exemplarily, three second radial flanges 31 are formed evenly spaced along the inner cavity wall of the cover edge 33. The three second radial flanges 31 are engaged with the first groove 21 at three angles to ensure uniform radial pressing force on the rubber sleeve 2.

[0065] In some embodiments, in order to further improve the tightness of the rubber sleeve 2 and the body sheet metal 4, an axial flange 35 is formed along the circumferential direction on the inner cavity wall of the cover edge 33. Therefore, when the wire harness fixing device is assembled with the body sheet metal 4, the axial flange 35 can apply an axial pressing force to the rubber sleeve 2 to ensure the tightness of the rubber sleeve 2 and the body sheet metal 4.

[0066] Exemplarily, an axial flange 35 is formed continuously and uninterruptedly along the inner cavity wall of the cover edge 33 in the circumferential direction, so that the entire circle of the rubber sleeve 2 is subjected to the axial pressing force of the axial flange 35 .

[0067] In some embodiments, in order to ensure the stability of the assembly of the wire harness fixing device with the body sheet metal, a mounting point 36 for assembly with the body sheet metal 4 is provided at the edge of the cover edge 33 .

[0068] In some embodiments, in order to facilitate the passage of the wire harness and improve the versatility of the wire harness fixing device. The diameter of the rubber sleeve 2 and the width of the guide groove 34 of the fixing cover 3 are generally larger than the diameter of the wire harness. After the wire harness passes through the wire harness fixing device, there will be a certain gap between the wire harness and the rubber sleeve 2 and the guide groove 34. When the vehicle is driving, this gap may cause the wire harness to shake and produce abnormal noise. Therefore, a through hole 37 is provided on the groove wall of the guide groove 34 for the small cable tie to pass through, so that after the wire harness passes through the guide groove 34, the small cable tie is passed through the through hole 37 to further fix the wire harness, which greatly reduces the possibility of abnormal noise caused by the shaking of the wire harness.

[0069] In some embodiments, in order to facilitate demoulding of the second radial flange 31 , a notch 38 is formed on the cover edge 33 at a position corresponding to the second radial flange 31 .

[0070] Exemplarily, three notches 38 corresponding to the three second radial flanges 31 are formed at circumferential intervals on the upper edge of the cover edge 33 .

[0071] In some embodiments, in order to ensure the stability and sealing of the wiring harness fixing device, a limit locking boss 12 is provided on the outer wall of the ring bracket 1. The limit locking boss 12 plays an axial limit role, so that one side of the body sheet metal 4 abuts against the limit locking boss 12, and the other side is sealed with the rubber sleeve 2.

[0072] Exemplarily, a plurality of limit locking bosses 12 are evenly spaced on the outer wall of the annular bracket 1. The arrangement position of the limit locking bosses 12 can be adaptively adjusted according to the thickness of the body sheet metal 4. It is sufficient to ensure that the distance from the limit locking bosses 12 to the first axial sealing protrusion 26 and the second axial sealing protrusion 27 at the end of the sealing body 25 of the rubber sleeve 2 is less than the thickness of the body sheet metal 4.

[0073] In some embodiments, a mounting structure of a wiring harness fixing device is also provided, including the wiring harness fixing device and a vehicle body sheet metal 4 in any of the above embodiments. To facilitate disassembly, assembly and maintenance, a connector 5 is used to assemble and fix the wiring harness fixing device and the vehicle body sheet metal 4 together.

[0074] Exemplarily, the mounting point 36 is a mounting hole, the inner hole wall of the mounting hole is provided with a tooth structure, the connecting piece 5 is a welding stud, and the welding stud is convexly welded on the body sheet metal 4. Through the locking fit between the welding stud and the mounting hole, the wiring harness fixing device and the body sheet metal 4 are firmly assembled together, and the locking fit between the welding stud and the mounting hole can also form a compression fit between the first axial sealing protrusion 26 and the second axial sealing protrusion 27 at the end of the sealing body 25 and the plane of the body sheet metal 4 to ensure the sealing performance.

[0075] In summary, the wire harness fixing device of the utility model is cleverly provided with a circular ring bracket in a rubber sleeve and a fixing cover outside the rubber sleeve. When fixing the wire harness, the wire harness fixing device can smoothly pass through the wire harness through hole on the body sheet metal, ensuring that the circular ring bracket is close to one side of the body sheet metal, and the rubber sleeve and the fixing cover are firmly fixed on the other side. The three work together, not only effectively fixing the wire harness, but also significantly improving the stability of the assembly of the wire harness fixing device and the body sheet metal. In particular, by forming a first groove in an annular direction on the rubber sleeve, and cleverly cooperating with the first radial flange formed in an annular direction on the circular ring bracket. When the curvature of the wire harness is large or the size is short, the first radial flange provides the necessary radial support for the rubber sleeve, effectively avoiding the problem of local deformation caused by excessive force on one side. This not only maintains the sealing performance of the wire harness fixing device, but also solves the problem that the ordinary rubber sleeve is easy to lose its sealing due to unilateral extrusion, and has the advantages of simple structure, convenient assembly and low cost, and has the value of promotion and application in the field of wire harness assembly technology.

[0076] The above embodiments are merely illustrative of the principles and effects of the present utility model, and are not intended to limit the present application. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present application. Therefore, all equivalent modifications or changes made by a person of ordinary skill in the art without departing from the spirit and technical ideas disclosed in the present application shall still be covered by the claims of the present application.

Claims

1. A wire harness fixing device, characterized in that: It comprises a circular ring bracket (1), a rubber sleeve (2) and a fixing cover (3); The rubber sleeve (2) is sleeved on the annular bracket (1), the fixed cover (3) is sleeved on the rubber sleeve (2), and the rubber sleeve (2) and the fixed cover (3) have a passage for the wire harness to pass through; A first groove (21) is formed in an annular direction on the rubber sleeve (2), and the first groove (21) is snap-fitted with a first radial flange (11) formed in an annular direction on the annular bracket (1).

2. The wire harness fixing device according to claim 1, characterized in that: A second groove (22) is also formed in an annular direction on the rubber sleeve (2), and the second groove (22) is snap-fitted with a second radial flange (31) formed in an annular direction on the fixing cover (3).

3. The wire harness fixing device according to claim 2, characterized in that: The rubber sleeve (2) comprises a piercing head (23), a guide sleeve (24) and a sealing body (25) which are sequentially formed along the axial direction; The first groove (21) is formed in an annular direction on the inner side wall of the sealing body (25), and the second groove (22) is formed in an annular direction on the outer side wall of the sealing body (25).

4. The wire harness fixing device according to claim 3, characterized in that: The end of the sealing body (25) is formed with a first axial sealing protrusion (26) and a second axial sealing protrusion (27) at intervals along the circumferential direction.

5. The wire harness fixing device according to claim 3, characterized in that: An annular flange (28) is formed on the outer side wall of the piercing head (23).

6. The wire harness fixing device according to claim 2, characterized in that: The fixed cover (3) comprises a cover body (32) and a cover edge (33) extending from the edge of the cover body (32), and a guide groove (34) for the wire harness to pass through is formed radially on the cover edge (33).

7. The wire harness fixing device according to claim 6, characterized in that: The second radial flanges (31) are formed at intervals along the inner cavity wall of the cover edge (33); And / or, an axial flange (35) is formed in the circumferential direction on the inner cavity wall of the cover edge (33); And / or, the edge of the cover (33) is provided with a mounting point (36) for assembly with the body sheet metal (4).

8. The wire harness fixing device according to claim 6, characterized in that: A through hole (37) for fixing the wiring harness is provided on the groove wall of the guide groove (34); And / or, a notch (38) is formed on the cover edge (33) at a position corresponding to the second radial flange (31).

9. The wire harness fixing device according to claim 1, characterized in that: A limiting locking boss (12) is provided on the outer side wall of the circular ring bracket (1).

10. An installation structure of a wire harness fixing device, characterized in that: It comprises a wiring harness fixing device as claimed in any one of claims 1 to 9 and a body sheet metal (4), wherein the wiring harness fixing device is assembled and fixed to the body sheet metal (4) via a connecting piece (5).

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