Anti-loose connecting structure for rearview mirror of commercial vehicle

Abstract

The utility model relates to an anti-loose connecting structure for a rearview mirror of a commercial vehicle, and belongs to the field of rearview mirrors of automobiles. According to the anti-loosening connecting structure for the rearview mirror of the commercial vehicle, the supporting rod arm freely rotates on the support through the annular groove and the annular protrusion. A hexagon bolt transition block composed of three layers of coaxially-stacked cushion blocks is assembled in the supporting rod arm through hole and the support through hole, the upper portion of the hexagon bolt transition block is of an outer hexagonal structure, the middle of the hexagon bolt transition block is of a cylindrical annular structure, and the bottom of the hexagon bolt transition block is of a cylindrical annular structure with the diameter larger than that of the protruding through hole and smaller than that of the protrusion. And a nut penetrates through the stud to fix the hexagon bolt transition block on the support. According to the utility model, nut loosening caused by rotation of the rearview mirror can be avoided, and the problem of shaking of the rearview mirror is solved.

Description

Technical Field

[0001] The utility model relates to an anti-loosening connection structure for a rearview mirror of a commercial vehicle, belonging to the field of automobile rearview mirrors. Background Art

[0002] In the design of commercial vehicles, rearview mirrors are important tools for drivers to observe the environment outside the vehicle, and their stability and reliability are crucial. However, there are some problems with the connection between the rearview mirror support and the support rod of commercial vehicles on the market, and these problems are mainly due to the inadequacy of their connection methods. At present, the connection between the rearview mirror support and the support rod of most vehicles is directly connected and fastened by nuts and bolts. This connection method allows the cantilever to rotate around the support to form a rotating mechanism. For example, in the prior art with application number 201420102238.0 "Vehicle Rearview Mirror", the rearview mirror and the support are connected together by studs and nuts. However, this design has an obvious defect, that is, the transition piece used for fastening is usually made of flexible materials such as plastic or nylon. After long-term use, the nuts made of these flexible materials will cause the connection force between the nut and the bolt to gradually decay due to their flexible characteristics. When the nut is loose, the connection between the support and the cantilever becomes unstable, causing the rearview mirror to swing excessively during driving. This swing not only affects the driver's line of sight and reduces driving safety, but may also cause trouble and discomfort to the driver due to the shaking of the rearview mirror. Utility Model Content

[0003] The utility model is to solve the problems existing in the above-mentioned prior art and provides an anti-loosening connection structure for a rearview mirror of a commercial vehicle. The utility model can prevent the nut from loosening due to the rotation of the rearview mirror and solve the problem of shaking of the rearview mirror.

[0004] To achieve the above-mentioned purpose, the technical solution provided by the utility model is as follows: an anti-loosening connection structure for a rearview mirror of a commercial vehicle, comprising at least a support arm and a support for fixing the vehicle rearview mirror, wherein the support arm is fixed to the support by a screw and a nut, and the support arm is composed of an upper support arm and an upper support arm cover, wherein a stud with a thread is vertically pre-embedded in the central part of one end of the upper support arm, an annular groove is provided at the end of the upper support arm cover, a support arm through hole for passing the stud is opened in the central part of the annular groove, and the support arm through hole is a hexagonal bolt hole; an annular protrusion matching the annular groove is provided on the top of the support, and the end of the upper support arm cover is installed through the annular groove At the top of the support, the support arm is allowed to rotate freely on the horizontal plane relative to the support; a support through hole for passing the stud is provided in the middle of the annular protrusion; a hexagonal bolt transition block is installed in the support arm through hole and the support through hole, and the hexagonal bolt transition block is axially provided with a through hole matching the stud, and the hexagonal bolt transition block is formed as a whole by three layers of coaxially stacked pads, wherein the upper part of the hexagonal bolt transition block is an outer hexagonal structure matching the support arm through hole, the middle part is a cylindrical annular structure matching the diameter of the support through hole, and the bottom is a cylindrical annular structure with a diameter larger than the annular protrusion through hole and smaller than the diameter of the annular protrusion; a nut passes through the stud to fix the hexagonal bolt transition block on the support.

[0005] The upper support rod arm and the upper support rod arm cover are fixed to each other through buckles.

[0006] The inner walls of the support arm through hole and the support seat through hole are both provided with anti-skid patterns to increase the friction between the hexagonal bolt transition block and the support arm through hole and the support seat through hole, thereby preventing the hexagonal bolt transition block from loosening during rotation.

[0007] According to the above technical solution, the anti-loosening connection structure for commercial vehicle rearview mirrors provided by the utility model is freely rotated on the support through the support arm through the annular groove and the annular protrusion. A hexagonal bolt transition block composed of three layers of coaxially stacked pads is assembled in the through hole of the support arm and the through hole of the support. The upper part of the hexagonal bolt transition block is an external hexagonal structure, the middle part is a cylindrical ring structure, and the bottom is a cylindrical ring structure with a diameter larger than the protrusion through hole and smaller than the protrusion diameter. The nut passes through the stud to fix the hexagonal bolt transition block on the support. Compared with the prior art, the utility model has the following advantages:

[0008] Because the upper part of the hexagonal bolt transition block in the technical solution adopted by the utility model is an external hexagonal structure, which forms a whole with the through hole of the support arm, the hexagonal bolt transition block can rotate synchronously with the support arm, avoiding the synchronous rotation of the stud when the support arm rotates, avoiding the uneven friction between the nut and the support arm caused by the rotation of the support arm, and thus avoiding the loosening of the rearview mirror nut. Therefore, the utility model can avoid the loosening of the nut due to the rotation of the rearview mirror and solve the problem of rearview mirror shaking. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 Assembly drawing of rearview mirror support arm and support;

[0010] Figure 2 Hexagon bolt transition block structure diagram;

[0011] Figure 3 Hexagon bolt transition block assembly cutaway view.

[0012] In the figure: 1. upper support arm; 2. support; 3. upper support arm cover; 4. hexagonal bolt transition block; 5. screw rod; 6. nut. DETAILED DESCRIPTION

[0013] The technical solution provided by the utility model is: an anti-loosening connection structure for a rearview mirror of a commercial vehicle, comprising at least a support arm and a support for fixing the rearview mirror of the vehicle, wherein the support arm is fixed on the support by a screw and a nut, and is characterized in that: the support arm is composed of an upper support arm and an upper support arm cover, wherein a stud is vertically pre-embedded in the central part of one end of the upper support arm, an annular groove is provided at the end of the upper support arm cover, a support arm through hole for passing the stud is opened in the central part of the annular groove, and the support arm through hole is a hexagonal through hole;

[0014] The top of the support is provided with an annular protrusion, and the end of the upper support arm cover is positioned and installed on the top of the support through the annular protrusion, so that the support arm can rotate freely on the horizontal plane relative to the support; a support through hole is opened in the depression in the middle of the annular protrusion, and a hexagonal bolt transition block is sleeved in the support arm through hole and the support through hole.

[0015] A hexagonal bolt transition block is installed in the through hole of the support arm and the through hole of the support seat. The hexagonal bolt transition block is provided with a through hole matching the stud along the axial direction. The hexagonal bolt transition block is a three-layer stepped shaft sleeve.

[0016] The upper layer of the hexagonal bolt transition block is an external hexagonal structure that matches the through hole of the support arm, the middle layer is an annular cylindrical structure that matches the diameter of the through hole of the support, and the lower layer is an annular cylindrical structure whose diameter is larger than the through hole of the annular protrusion and smaller than the diameter of the annular protrusion; the stud passes through the sleeve and nut of the hexagonal bolt transition block to fix the hexagonal bolt transition block on the support.

[0017] Implementation example Figure 1As shown, it at least includes a support arm and a support 2 for fixing a vehicle rearview mirror, wherein the support arm is fixed on the support 2 by a screw 5 and a nut 6, and the support arm is composed of an upper support arm 1 and an upper support arm cover 3, and the upper support arm 1 and the upper support arm cover 3 are fixed to each other by a buckle. A threaded stud is vertically pre-embedded in the center of one end of the upper support arm 1, and an annular groove is provided at the end of the upper support arm cover 3. A support arm through hole for passing the stud is provided in the center of the annular groove, and the support arm through hole is a hexagonal bolt hole, i.e., a hexagonal through hole; an annular protrusion matching the annular groove is provided at the top of the support 2, and the end of the upper support arm cover 3 is installed on the top of the support 2 through the annular groove, so that the support arm can rotate freely on the horizontal plane relative to the support 2; a support 2 through hole for passing the stud is provided in the middle of the annular protrusion;

[0018] The through hole of the support arm and the through hole of the support 2 are equipped with a hexagonal bolt transition block 4, which is provided with a through hole matching the stud along the axial direction. The hexagonal bolt transition block 4 is formed by three layers of coaxially stacked pads, i.e., a three-layer stepped shaft sleeve, wherein the upper part of the hexagonal bolt transition block 4, i.e., the upper layer, is an outer hexagonal structure matching the through hole of the support arm, the middle part, i.e., the middle layer, is a cylindrical ring structure matching the diameter of the through hole of the support 2, and the bottom, i.e., the lower layer, is a cylindrical ring structure having a diameter larger than the through hole of the annular protrusion and smaller than the diameter of the annular protrusion, i.e., an annular cylindrical structure; the inner walls of the through hole of the support arm and the through hole of the support 2 are provided with anti-skid patterns to increase the friction between the hexagonal bolt transition block 4 and the through hole of the support arm and the through hole of the support 2, so as to prevent the hexagonal bolt transition block 4 from loosening when rotating. The screw 5 passes through the sleeve of the hexagonal bolt transition block and the nut 6 to fix the hexagonal bolt transition block 4 on the support 2.

[0019] When using this device Figure 1 As shown, the upper support arm 1 and the upper support arm cover 3 are directly assembled on the support 2, connected by a screw 5, and the screw 5 and the nut 6 are connected by a hexagonal bolt transition block 4. Figure 3 As shown in , after the screw rod 5 and the upper support arm 1 are assembled in place, the upper support arm cover 3 is installed first, and then a hexagonal bolt transition block 4 structure is added between the upper support arm cover 3 and the upper support 2, and finally the nut 6 is installed.

Claims

1. An anti-loosening connection structure for a rearview mirror of a commercial vehicle, comprising at least a support arm and a support for fixing the vehicle rearview mirror, wherein the support arm is fixed to the support by a screw and a nut, characterized in that: The support arm is composed of an upper support arm and an upper support arm cover, wherein a stud is vertically pre-buried in the center of one end of the upper support arm, an annular groove is provided at the end of the upper support arm cover, a support arm through hole for passing the stud is opened in the center of the annular groove, and the support arm through hole is a hexagonal through hole; The top of the support is provided with an annular protrusion, and the end of the upper support arm cover is positioned and installed on the top of the support through the annular protrusion, so that the support arm can rotate freely on the horizontal plane relative to the support; a support through hole is opened in the depression in the middle of the annular protrusion, and a hexagonal bolt transition block is sleeved in the support arm through hole and the support through hole. A hexagonal bolt transition block is installed in the through hole of the support arm and the through hole of the support seat. The hexagonal bolt transition block is provided with a through hole matching the stud along the axial direction. The hexagonal bolt transition block is a three-layer stepped shaft sleeve. The upper layer of the hexagonal bolt transition block is an external hexagonal structure that matches the through hole of the support arm, the middle layer is an annular cylindrical structure that matches the diameter of the through hole of the support, and the lower layer is an annular cylindrical structure whose diameter is larger than the through hole of the annular protrusion and smaller than the diameter of the annular protrusion; the stud passes through the sleeve and nut of the hexagonal bolt transition block to fix the hexagonal bolt transition block on the support.

2. The anti-loosening connection structure for a rearview mirror of a commercial vehicle according to claim 1, characterized in that: The upper support rod arm and the upper support rod arm cover are fixed to each other through buckles.

3. The anti-loosening connection structure for a rearview mirror of a commercial vehicle according to claim 1, characterized in that: The inner walls of the support arm through hole and the support seat through hole are both provided with anti-skid patterns to increase the friction between the hexagonal bolt transition block and the support arm through hole and the support seat through hole, thereby preventing the hexagonal bolt transition block from loosening during rotation.

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