Assembly tool for reducing poor contact between bond strap and frame
By setting a hard protrusion on the assembly tool to form a height difference with the end of the body, the problems of easy damage to the polishing disc and incomplete cleaning of paint debris are solved, and better conductivity and contact stability are achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- DONGFENG XINJIANG AUTOMOBILE
- Filing Date
- 2025-06-24
- Publication Date
- 2026-05-19
AI Technical Summary
In existing technologies, the grinding discs are easily damaged and have insufficient hardness, resulting in poor contact between the grounding wire and the frame. Furthermore, incomplete removal of paint residue affects the conductivity.
An assembly tool with a height difference between a hard protrusion and the end of the body is used to scrape the paint layer through point contact or line contact. When the paint layer is broken, the hard protrusion can fall between the height differences, reducing debris accumulation and improving conductivity.
This effectively avoids incomplete treatment due to material wear, improves the conductivity between the grounding wire and the frame, and reduces poor contact and safety hazards.
Smart Images
Figure CN224254994U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of machinery, and in particular to an assembly tool for reducing poor contact between the grounding wire and the vehicle frame. Background Technology
[0002] In automotive electrical systems, a reliable electrical connection between the ground wire and the chassis is crucial for ensuring stable circuit operation. Current technology uses a grinding disc mounted on a fixing bolt to grind away the paint around the electrical contact hole, using friction to break down the paint on the chassis surface and allow the ground wire to make contact with the metal parts of the chassis. However, this method using a grinding disc has the following problems:
[0003] On the one hand, sanding discs are easily damaged and lack sufficient hardness. Existing sanding discs are usually cut from sandpaper, which has limited material strength. During the sanding process, the sanding disc may wear down or flatten due to friction, heat, or mechanical pressure before the paint layer is completely worn away, resulting in insufficient exposure of the metal of the structural components and affecting the conductivity of the grounding wire.
[0004] On the other hand, incomplete removal of paint debris affects conductivity. Paint debris generated during the polishing process is squeezed between the polishing pad and the surface of the structural component, forming an insulating barrier. Even if the paint layer is partially removed, the residual paint debris will still hinder the direct contact between the ground wire and the metal substrate, leading to increased contact resistance and potentially causing safety hazards such as poor circuit contact and signal interference. Summary of the Invention
[0005] This application provides an assembly tool to reduce poor contact between the grounding wire and the vehicle frame, thereby solving the problems of grinding discs used in related technologies, such as easy breakage of the grinding discs, insufficient hardness leading to inadequate metal exposure, and incomplete removal of paint residue, which affects the conductivity.
[0006] Firstly, an assembly tool is provided to reduce poor contact between the grounding wire and the frame, comprising:
[0007] ontology,
[0008] A grinding section is provided at one end of the body, and it has a center section and an edge section. A hard protrusion is provided between the center section and the edge section. The hard protrusion makes point contact or line contact with the workpiece to be ground, and the hard protrusion forms a height difference with the end of the body.
[0009] In some embodiments, the hard protrusion is a plurality of protrusions arranged radially along the grinding portion, and the projected area of the protrusions near the body is larger than that of the end away from the body.
[0010] The protruding teeth on different diameters are misaligned.
[0011] In some embodiments, the hard protrusion is a ridge extending radially along the grinding portion, and the ridge gradually tapers axially from the end away from the body.
[0012] In some embodiments, the hard protrusion is a raised strip extending circumferentially along the grinding portion, and the raised strip gradually tapers axially from the end away from the body.
[0013] In some embodiments, the angle between the protrusion and the end face of the body is less than 90 degrees.
[0014] In some embodiments, the convex strips are provided at multiple intervals along the circumference of the polishing portion.
[0015] In some embodiments, a mounting portion is also included, which is disposed at the end of the body away from the polishing portion, and the end of the mounting portion is provided with a mounting groove.
[0016] In some embodiments, the mounting portion has a circumferential groove on its side wall, and the groove has a mounting hole.
[0017] In some embodiments, a positioning part is also included, which is disposed at one end of the body near the polishing part and extends out of the polishing part.
[0018] In some embodiments, the positioning part is a positioning pin coaxially disposed with the body, and the diameter of the positioning pin is smaller than the inner diameter of the grinding part.
[0019] This application provides an assembly tool to reduce poor contact between the grounding wire and the vehicle frame. A grinding section is provided at one end of the main body, and a hard protrusion is provided on the grinding section. The hard protrusion has better hardness and wear resistance than sandpaper. During rotation, it makes point or line contact with the workpiece to be ground, thereby scraping the paint layer and avoiding incomplete processing due to material wear. Furthermore, because the hard protrusion forms a height difference with the end of the main body, the hard protrusion can fall between the height differences when breaking through the paint layer, reducing the risk of debris accumulation at the contact interface and thus improving conductivity. Attached Figure Description
[0020] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0021] Figure 1 This is a schematic diagram of the assembly tool structure for reducing poor contact between the grounding wire and the vehicle frame, provided in Embodiment 1 of this application.
[0022] Figure 2This is a schematic diagram of the elevation structure of the assembly tool for reducing poor contact between the grounding wire and the vehicle frame, as provided in Embodiment 1 of this application. Figure I ;
[0023] Figure 3 This is a schematic diagram of the elevation structure of the assembly tool for reducing poor contact between the grounding wire and the vehicle frame, as provided in Embodiment 1 of this application. Figure II ;
[0024] Figure 4 This is a schematic diagram of the elevation structure of the assembly tool for reducing poor contact between the grounding wire and the vehicle frame, as provided in Embodiment 1 of this application. Figure II ;
[0025] Figure 5 This is a schematic diagram of the elevation structure of the assembly tool for reducing poor contact between the grounding wire and the vehicle frame, provided in Embodiment 2 of this application.
[0026] Figure 6 This is a schematic diagram of the elevation structure of the assembly tool for reducing poor contact between the grounding wire and the vehicle frame, provided in Embodiment 3 of this application.
[0027] In the diagram: 1. Body; 2. Grinding part; 3. Hard protrusion; 301. Raised tooth; 302. Raised strip; 4. Mounting part; 401. Mounting groove; 402. Groove; 403. Mounting hole; 5. Positioning part. Detailed Implementation
[0028] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0029] This application provides an assembly tool to reduce poor contact between the grounding wire and the vehicle frame. It can solve the problems of grinding with grinding discs in related technologies, such as easy breakage of the grinding discs, insufficient hardness leading to insufficient metal exposure, and incomplete removal of paint residue, which affects the conductivity.
[0030] Example 1:
[0031] like Figures 1 to 4 As shown, an assembly tool for reducing poor contact between the grounding wire and the vehicle frame includes:
[0032] Body 1: The body is a solid cylindrical structure, preferably made of diamond particles, silicon carbide, or cemented carbide, possessing excellent toughness and fatigue resistance, capable of withstanding mechanical stress during prolonged use. It is more economical than easily consumable materials like sandpaper, making it particularly suitable for large-scale production scenarios.
[0033] The grinding part 2 is located at one end of the body 1 and is integrally formed with the body 1. It has a center part and an edge part. The center part is the center point of the grinding part 2, and the edge part is the edge of the grinding part 2. A hard protrusion 3 is provided between the center part and the edge part. The hard protrusion 3 makes point contact or line contact with the workpiece to be ground, and the hard protrusion 3 forms a height difference with the end of the body 1. The height difference is about 2 to 5 mm, which can ensure that the hard protrusion 3 can effectively scrape the paint layer, and also provide sufficient space for the debris to fall off.
[0034] A grinding section 2 is provided at one end of the main body, and a hard protrusion 3 is provided on the grinding section 2. The hard protrusion 3 has better hardness and wear resistance than sandpaper. During rotation, it makes point or line contact with the workpiece to be ground, thereby scraping the paint layer and avoiding incomplete treatment due to material wear. In addition, since the hard protrusion 3 forms a height difference with the end of the main body, the hard protrusion 3 can fall between the height difference when breaking the paint layer, reducing the risk of debris accumulating at the contact interface and thus improving the conductivity.
[0035] In this embodiment, the hard protrusion 3 consists of multiple protruding teeth 301 arranged radially along the center of the grinding part 2. The projected area of the protruding teeth 301 near the body 1 is larger than that of the end away from the body 1, forming an inverted conical structure. The tips or edges of the protruding teeth 301 form local high-stress areas, which can quickly penetrate the paint layer and contact the metal substrate during grinding, increasing the scraping force and improving grinding efficiency. This is especially suitable for thicker paint layers or high-hardness surfaces (such as the electrophoretic paint layer on a vehicle frame). At the same time, the protruding teeth 301 located on different diameters are staggered. This allows for a more uniform grinding effect and avoids grinding dead corners.
[0036] In this embodiment, a mounting part 4 is also included, which is integrally formed with the body 1. The mounting part 4 is located at the end of the body 1 away from the grinding part 2, and its end is provided with a mounting groove 401. The mounting groove 401 can be hexagonal or quadrilateral, such as... Figure 3 As shown, a quadrilateral shape is used in this application as an example. It is used to connect with the output shaft of common pneumatic or power tools, such as pneumatic wrenches or electric wrenches, to realize the power drive of the assembly tool.
[0037] Furthermore, the mounting part 4 has a groove 402 circumferentially provided on its side wall, and a mounting hole 403 is provided on the groove 402. The mounting hole 403 is used to install auxiliary components such as fixing clips to meet the needs of different usage scenarios.
[0038] In this embodiment, a positioning part 5 is also included. The positioning part 5 is disposed at one end of the main body 1 near the grinding part 2 and extends out of the grinding part 2. The positioning part 5 is a positioning pin coaxially disposed with the main body 1, and the diameter of the positioning pin is smaller than the inner diameter of the grinding part 2. A mounting groove is provided at the center of one end of the main body, that is, a mounting groove is provided at the center of the grinding part 2, and the mounting groove is used to install the positioning part 5. The end of the positioning pin adopts an arc-shaped design, which can be easily inserted into the positioning hole on the frame during use to achieve precise positioning of the assembly tool, ensuring that the grinding part can accurately act on the contact area between the ground wire and the frame, thereby improving assembly accuracy.
[0039] Example 2:
[0040] like Figure 5 As shown, the difference from Embodiment 1 is that the hard protrusion 3 is a ridge 302 extending radially along the polishing part 2, and the ridge 302 gradually tapers from the end away from the body 1 along the axial direction of the body 1. This gradient structure allows the front end of the ridge 302 to more easily cut into the paint layer during polishing, while the rear end provides sufficient support to ensure the stability of the polishing process.
[0041] Furthermore, the angle between the protrusion 302 and the end face of the body 1 is less than 90 degrees. The angle of the protrusion 302 is 70-85 degrees. This angle allows the protrusion to generate a suitable cutting force during rotation, which ensures effective removal of the paint layer while avoiding excessive damage to the metal surface of the frame.
[0042] Furthermore, multiple raised strips 302 are spaced apart along the circumference of the grinding section. The coordinated operation of these multiple raised strips 302 allows for the covering of a larger grinding area per unit time, thus improving work efficiency.
[0043] In addition, the surface of the grinding section 2 is also provided with anti-slip texture. The texture adopts an interlaced diagonal design. When the worker holds the assembly tool to operate, the anti-slip texture can increase the friction between the hand and the grinding section, prevent the tool from slipping in the hand, and improve the safety of operation.
[0044] Example 3:
[0045] like Figure 6 As shown, the difference from Embodiment 2 is that the hard protrusion 3 is a ridge 302 extending circumferentially along the grinding part 2. That is, the ridge 302 in this embodiment is arc-shaped, while the ridge 302 in Embodiment 2 is straight. The ridge 302 gradually shrinks from the end away from the body 1 along the axial direction of the body 1.
[0046] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.
[0047] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.
[0048] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.
Claims
1. An assembly tool for reducing poor contact between the grounding wire and the vehicle frame, characterized in that, It includes: Ontology(1), The grinding part (2) is provided at one end of the body (1), and has a center part and an edge part. A hard protrusion (3) is provided between the center part and the edge part. The hard protrusion (3) makes point contact or line contact with the workpiece to be ground, and the hard protrusion (3) forms a height difference with the end of the body (1).
2. The assembly tool for reducing poor contact between the grounding wire and the frame as described in claim 1, characterized in that: The hard protrusion (3) consists of a plurality of protrusions (301) arranged radially along the grinding part, and the projected area of the protrusions near the body (1) is larger than that of the end away from the body (1). The protruding teeth (301) located on different diameters are misaligned.
3. The assembly tool for reducing poor contact between the grounding wire and the frame as described in claim 1, characterized in that: The hard protrusion (3) is a ridge (302) extending radially along the polishing part (2), and the ridge (302) gradually shrinks axially from the end away from the body (1).
4. The assembly tool for reducing poor contact between the grounding wire and the frame as described in claim 1, characterized in that: The hard protrusion (3) is a convex strip (302) extending circumferentially along the polishing part (2), and the convex strip (302) gradually shrinks axially from the end away from the body (1).
5. The assembly tool for reducing poor contact between the grounding wire and the frame as described in claim 3 or 4, characterized in that: The angle between the protrusion (302) and the end face of the body (1) is less than 90 degrees.
6. The assembly tool for reducing poor contact between the grounding wire and the frame as described in claim 3 or 4, characterized in that: The convex strips (302) are provided at multiple intervals along the circumference of the polishing part (2).
7. The assembly tool for reducing poor contact between the grounding wire and the frame as described in claim 1, characterized in that: It also includes a mounting part (4), which is located at one end of the body (1) away from the polishing part (2), and has a mounting groove (401) at its end.
8. The assembly tool for reducing poor contact between the grounding wire and the frame as described in claim 7, characterized in that: The mounting part (4) has a groove (402) circumferentially provided on its side wall, and a mounting hole (403) is provided on the groove (402).
9. The assembly tool for reducing poor contact between the grounding wire and the frame as described in claim 1, characterized in that: It also includes a positioning part (5), which is disposed on the body (1) near the polishing part (2) and extends out of the polishing part (2).
10. The assembly tool for reducing poor contact between the grounding wire and the frame as described in claim 9, characterized in that: The positioning part (5) is a positioning pin coaxially arranged with the body (1), and the diameter of the positioning pin is smaller than the inner diameter of the grinding part (2).