A seamlessly fitting car frame polishing machine

Abstract

This utility model discloses a seamlessly fitting vehicle frame polishing machine, including a polishing main unit, a polishing disc, a main spindle head, and a rotating head seat. The rotating head seat is integrally formed with the polishing disc. A sleeve is provided at the bottom of the main spindle head, with several locking lugs on the inner side of the sleeve. Locking lugs are provided on the outer periphery of the rotating head seat, allowing insertion into the sleeve and rotational locking connection. A magnetic ring is provided on the outside of the sleeve, and a ferromagnetic positioning ring is provided on the rotating head seat for adsorption and engagement. The sleeve structure gradually increases in thickness along the rotation direction, achieving self-locking during rotation. The main spindle head and an internal motor drive the polishing disc to rotate. This structure allows for quick assembly and disassembly of the polishing disc and tool-less replacement, improving fitting accuracy and work efficiency, while eliminating protruding structures on the outside of the polishing disc, making it suitable for high-precision surface polishing applications.

Description

Technical Field

[0001] This utility model relates to the field of polishing technology, specifically a seamlessly fitting vehicle frame polishing machine. Background Technology

[0002] Grinding and polishing equipment, as a type of power tool commonly used for grinding, deburring, and precision surface treatment of metal components, has a wide range of applications in industrial manufacturing, machining, weld repair, and vehicle assembly. Especially when performing fine surface treatment on welded areas of vehicle frames or irregular structural parts, the fitting accuracy and ease of loading and unloading in grinding and polishing operations directly affect processing efficiency and surface quality.

[0003] In existing technologies, common grinding and polishing discs are mostly connected to the motor spindle via bolts, nuts, or snap-fit ​​structures, with the grinding disc being fixed to the spindle by screwing it in. Another type of structure, such as the quick-loading and unloading grinding and polishing mechanism disclosed in CN206059419U, uses a rotatable latch to achieve the insertion and locking of the grinding disc. However, the above structures all have the following main shortcomings in practical use: Low assembly and disassembly efficiency and high labor intensity: Threaded connections require tools to tighten or disassemble, which is cumbersome and can easily lead to efficiency bottlenecks, especially in scenarios where grinding and polishing discs are changed frequently.

[0004] Insufficient connection precision and robustness: Traditional snap-fit ​​structures are at risk of loosening under the high-speed rotation of the polishing disc. Some structures suffer from unstable assembly due to accumulated manufacturing tolerances or wear of the slots, affecting the quality of the polishing process.

[0005] Structural interference and poor fit: Existing grinding and polishing discs often have raised structures (such as locking nuts or snap-fit ​​bosses) on the back of the working surface, which can easily cause unevenness of the mating surface and make it impossible to achieve a tight and seamless fit with the surface of the chassis to be processed. This is especially true when processing curved surfaces or irregularly shaped parts, where the fit deviation is more obvious and seriously affects the consistency and integrity of the surface treatment.

[0006] Therefore, there is an urgent need for a grinding and polishing connection device that enables rapid assembly and disassembly, has a stable structure, and has no protruding structures on the grinding disc contact surface, in order to improve grinding and polishing assembly efficiency and work quality, and adapt to the needs of precision industrial processing. This utility model proposes an improvement solution to address the above problems by achieving the aforementioned functional improvements through a novel screw-in locking structure and magnetic adhesion mechanism. Utility Model Content

[0007] This utility model aims to solve one of the technical problems existing in the prior art or related technologies.

[0008] Therefore, the technical solution adopted by this utility model is as follows: a seamlessly fitting vehicle frame polishing machine, including a polishing main unit, a polishing disc, a main shaft head, and a rotating head seat. The main shaft head is rotatably mounted on the polishing main unit and can be quickly assembled and disassembled with the rotating head seat. The rotating head seat and the polishing disc are an integral structure. The locking lug of the rotating head seat is inserted into and self-locked inside the sleeve at the lower end of the main shaft head. Stable fixation and rapid release are achieved through a magnetic suction component and a rotary lock structure. The above structure eliminates the exposed connecting parts of the polishing disc, enabling a truly seamless fit on its processed surface.

[0009] In a preferred embodiment, the present invention is further configured such that: the spindle head is connected to the sleeve via its lower end shaft, and the sleeve is provided with a magnetic ring on its outer periphery. The magnetic ring is composed of several embedded permanent magnet blocks, which together with the ferromagnetic positioning ring provided on the outer periphery of the rotating head seat form an adsorption and fixing structure.

[0010] Specifically, the magnetic structure can provide additional adhesion force during rotational loading, effectively improving the adsorption strength of the positioning ring and the overall stability of the polishing disc.

[0011] In a preferred embodiment, the present invention is further configured such that: a plurality of locking ears are arranged axially on the inner side of the sleeve, and slots are formed between the locking ears for insertion and engagement of the locking ears on the rotating head seat; the cross section of the locking ear is a right-angled triangle, and the locking ear self-locks and weaves itself in the direction of rotation after insertion.

[0012] Specifically, the inclined abutment structure can enhance the locking force during rotation, effectively preventing the connection from loosening during high-speed grinding and polishing operations.

[0013] In a preferred embodiment, the present invention is further configured such that the thickness of the sleeve gradually increases along the rotation direction, and the depth of the inner cavity is consistent with the total thickness of the locking lug and the locking ear, so that the locking ear after insertion is further pressed in during rotation, thereby enhancing the fit of the assembly.

[0014] Specifically, the wedge-tightening structure creates a self-locking effect under the drive of the spindle rotation, improving the stability and load capacity of the equipment.

[0015] In a preferred embodiment, the present invention is further configured such that the locking lug and the locking contact lug are in a sliding contact fit, so that no jamming occurs during insertion and efficient replacement can be achieved without tools during assembly and disassembly.

[0016] Specifically, this structure significantly shortens the replacement cycle of the grinding and polishing discs and greatly improves maintenance efficiency.

[0017] In a preferred embodiment, the present invention is further configured such that: the grinding and polishing host has a built-in motor, and the output end of the motor meshes with the end of the main shaft head through transmission teeth to drive the main shaft head and the grinding and polishing disc to rotate, thereby realizing the grinding and polishing operation.

[0018] Specifically, the spindle head has reliable and stable power transmission, which, combined with the overall spindle lock structure, improves transmission efficiency and operating accuracy.

[0019] In a preferred embodiment, the present invention is further configured such that: the grinding disc and the rotating head seat are integrally formed, the processing surface has no protruding connecting structure, one side of the rotating head seat is connected to the spindle head, and the other side is flat without interference, so as to achieve full fit with the workpiece to be ground.

[0020] Specifically, this structural design ensures that the surface of the polishing disc is not disturbed by the structure, making it suitable for high-quality machining of complex curved surfaces and mating parts.

[0021] Through the above design, this utility model constructs a grinding and polishing machine connection structure that is easy to assemble, fits tightly, and has stable transmission. It achieves the comprehensive goals of quick disc replacement, tool-free disassembly and assembly, no interference in grinding surfaces, and improved grinding and polishing efficiency, significantly enhancing the adaptability and practicality of the equipment and having broad application value.

[0022] The beneficial effects achieved by this utility model are as follows: 1. In this utility model, the rotary head seat and the polishing disc are integrally formed, and a screw-in snap-fit ​​structure including locking lugs, locking ears and sleeves is provided between the rotary head seat and the main shaft head. This allows the polishing disc to be quickly disassembled and securely locked, effectively improving the assembly efficiency and connection stability of the polishing device. It avoids the loosening or wear problems caused by repeated disassembly and assembly of traditional bolt or snap-fit ​​structures, and significantly improves the reliability and service life of the equipment.

[0023] 2. In this utility model, an auxiliary bonding structure composed of a magnetic suction ring and a positioning ring is adopted. This structure can achieve rapid docking while enhancing the connection and adsorption force through magnetic force, ensuring a tight fit between the spindle head and the grinding and polishing disc. Furthermore, the working surface of the grinding and polishing disc has no protruding parts. While ensuring a firm connection of the structure, it can achieve seamless bonding with the surface of the frame or the workpiece to be processed, thereby improving the grinding and polishing accuracy and effectively avoiding the risk of local interference and surface scratches. It is suitable for precision grinding applications with high surface quality requirements. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of one embodiment of the present utility model; Figure 2 This is a schematic diagram of the transmission connection structure between the grinding and polishing host and the grinding and polishing disc according to one embodiment of the present invention; Figure 3 This is a schematic diagram of the grinding and polishing disc and spindle head structure according to one embodiment of the present invention; Figure 4 This is a schematic diagram of the relative surfaces of the rotating head seat and the sleeve seat according to an embodiment of the present invention; Figure 5This is a schematic diagram of the surface structure of the sleeve and magnetic ring according to an embodiment of the present invention.

[0025] Figure label: 100. Grinding and polishing main unit; 110. Grinding and polishing disc; 200. Spindle head; 210. Shaft; 220. Sleeve; 221. Locking lug; 230. Magnetic ring; 300, Rotating head seat; 310, Positioning ring; 301, Locking lug. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features of the present utility model can be combined with each other.

[0027] It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this invention.

[0028] The following describes, with reference to the accompanying drawings, some embodiments of the present invention, providing a seamlessly fitting vehicle frame polishing machine.

[0029] Combination Figures 1-5 As shown, the present invention provides a seamlessly fitting vehicle frame polishing machine, including a polishing main unit 100, a polishing disc 110, a main shaft head 200, and a rotating head seat 300 fixed to the surface of the polishing disc 110.

[0030] The main spindle head 200 is rotatably mounted on the surface of the polishing machine 100 and is used to drive the polishing disc 110 to rotate. The rotating head seat 300 is connected to the main spindle head 200 by a quick-release structure, which facilitates the rapid replacement of the polishing disc 110. The rotating head seat 300 has several locking lugs 301 on its surface for insertion and engagement with the sleeve 220 at the bottom of the main spindle head 200. A positioning ring 310 for axial alignment is fixedly installed on the outer periphery of the rotating head seat 300. The positioning ring 310 is a ferromagnetic component.

[0031] The main shaft head 200 is connected to the motor inside the grinding and polishing host 100 via an internally provided shaft 210. The motor output end and the end of the main shaft head 200 are provided with a set of meshing transmission gears to realize power transmission, thereby driving the main shaft head 200 to drive the grinding and polishing disc 110 to rotate at high speed.

[0032] like Figure 2As shown, a sleeve 220 is fixedly connected to the bottom end of the shaft 210, and the sleeve 220 is used for insertion connection with the rotary head seat 300. A magnetic ring 230 is provided on the outer periphery of the sleeve 220. The magnetic ring 230 is composed of several circumferentially distributed permanent magnet blocks, which form a magnetic attraction fit with the ferromagnetic positioning ring 310 on the rotary head seat 300 to improve the connection and fit strength and prevent axial loosening during rotation.

[0033] The inner side of the sleeve 220 is provided with a plurality of axially arranged locking ears 221, and a slot is formed between adjacent locking ears 221. The gap width of the slot is greater than or equal to the thickness of the locking ears 301 on the rotating head seat 300, so that the locking ears 301 can be smoothly inserted. Specifically, after insertion, the locking ears 301 form a self-locking structure by abutting against the inclined surfaces of the locking ears 221, thereby realizing the locking connection between the spindle head 200 and the polishing disc 110. This connection structure can gradually wed in a tightening state during rotation, further improving the stability of the connection.

[0034] Furthermore, such as Figure 5 As shown, the locking lug 221 is in the shape of a right triangle, and its inclined surface is used to achieve inclined engagement with the surface of the locking lug 301. After the rotating head seat 300 is inserted, rotating the spindle head 200 can make the locking lug 301 slide into the locking lug 221 in the direction of rotation, thereby achieving rotational locking and preventing it from falling off.

[0035] Furthermore, such as Figure 4 As shown, the thickness of the sleeve 220 gradually increases along the rotation direction of the spindle head 200. As the spindle head 200 rotates, the rotating head seat 300 is gradually pressed in by the inclined surface of the locking lug 221, achieving a wedge-type self-tightening effect with increased locking strength as the rotation increases, which is suitable for high-load grinding and polishing scenarios.

[0036] Furthermore, such as Figure 3 and Figure 4 As shown, when the spindle head 200 and the rotating head seat 300 are engaged, the inner wall of the sleeve 220 slides against the outer periphery of the rotating head seat 300, and the outer peripheral surface of the locking ear 301 also slides against the inner wall of the sleeve 220, forming a double-fitting structure of axial limiting and radial support, thereby effectively suppressing vibration and eccentricity.

[0037] During assembly, the user initially aligns the polishing disc 110 with the rotating head seat 300 using the positioning ring 310, then inserts the rotating head seat 300 into the sleeve 220. The locking lugs 301 smoothly pass through the gap between the locking lugs 221. Subsequently, torque is applied in the rotation direction of the spindle head 200 to achieve locking. The magnetic attraction between the magnetic ring 230 and the positioning ring 310 further enhances the assembly stability.

[0038] After use, the operator can rotate the spindle head 200 in reverse to disengage the locking lug 301 from the inclined surface of the locking lug 221, thereby achieving quick disassembly of the grinding disc 110, which significantly improves the efficiency of grinding disc replacement and the convenience of equipment operation and maintenance.

[0039] In the above structure, the processing surface of the polishing disc 110 has no bolts or bayonet protrusions, achieving seamless contact with the vehicle frame surface, effectively improving the contact stability and uniformity of the polishing operation, and avoiding the problem of local grinding dead angles caused by traditional protruding connection structures.

[0040] Working principle and usage process of this utility model: During use, the polishing disc 110 and the rotating head seat 300 are manufactured as a single piece during the production stage. The user first centers the polishing disc 110, which includes the rotating head seat 300, axially using the positioning ring 310 on the rotating head seat 300 in conjunction with the outer edge of the polishing disc 110. During assembly, the operator inserts the rotating head seat 300, equipped with locking lugs 301, into the inner side of the sleeve 220 at the bottom of the spindle head 200, allowing the locking lugs 301 to pass through the gaps between the locking lugs 221 within the sleeve 220. Once the rotating head seat 300 is fully inserted, the user applies torque in the direction of rotation of the spindle head 200, causing the locking lugs 301 to abut against the inclined surfaces of the locking lugs 221 within the sleeve 220, achieving a self-locking structure.

[0041] The spindle head 200 is connected to the built-in motor of the grinding and polishing main unit 100. When the motor is powered on, it drives the spindle head 200 to rotate, which in turn drives the grinding and polishing disc 110 to achieve high-speed rotation. As the thickness of the sleeve 220 gradually increases along the rotation direction, the rotating head seat 300 will be further pressed under the wedge action of the locking lug 221 during rotation, thereby enhancing the connection reliability and preventing loosening or jumping under high-load grinding and polishing conditions.

[0042] The magnetic ring 230 is embedded on the outer periphery of the sleeve 220, and the permanent magnet block and the positioning ring 310 on the rotating head seat 300 form a magnetic attraction, further enhancing the assembly stability and fit density. The positioning ring 310 is made of ferromagnetic material, with stable attraction force, ensuring that no axial displacement occurs after assembly.

[0043] After the grinding and polishing operation is completed, the operator can rotate the spindle head 200 in reverse to disengage the locking lug 301 from the gap of the locking lug 221, thereby achieving quick disassembly and replacement and improving the efficiency of equipment maintenance and grinding and polishing disc replacement.

[0044] This structure combines a triple connection mode of "screw-lock-magnetic attraction", which not only improves assembly efficiency and operational safety, but also ensures the stable operation of the grinding and polishing disc under high load. It is particularly suitable for surface treatment applications of vehicle frame parts that have high requirements for grinding accuracy, fit and sealing and vibration resistance.

[0045] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0046] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A seamless fitting frame grinding and polishing machine, characterized in that, include: The polishing machine comprises a polishing disc (110), a polishing disk (110), a spindle head (200), and a rotating head seat (300) fixed to the surface of the polishing disk (110). The spindle head (200) is rotatably mounted on the surface of the polishing machine (100) for quick connection and disconnection with the surface of the rotating head seat (300). The surface of the rotating head seat (300) is provided with several locking lugs (301), and the outer periphery of the rotating head seat (300) is provided with a positioning ring (310) fixed to the surface of the polishing disk (110). The main spindle head (200) includes a shaft (210), the bottom end of which is fixedly connected to a sleeve (220), and a magnetic ring (230) is fixedly installed on the outer periphery of the sleeve (220); the inner side of the sleeve (220) is provided with a plurality of axially arranged locking ears (221), and the gap width between adjacent locking ears (221) is greater than or equal to the width of the locking ear (301), for the locking ear (301) to be inserted into the inner side of the sleeve (220).

2. The seamless, fitted frame sanding machine of claim 1, wherein, The grinding and polishing host (100) has a built-in motor, and the output end of the motor and the end of the main shaft head (200) are provided with transmission teeth that mesh with each other.

3. The seamless, fitted frame sanding machine of claim 1, wherein, The magnetic ring (230) has several permanent magnet blocks embedded in its surface and arranged in a circumferential manner. The positioning ring (310) is a ferromagnetic component used to adhere to the surface of the magnetic ring (230).

4. The seamlessly fitting vehicle frame polishing machine according to claim 1, characterized in that, The locking lug (221) is in the shape of a right triangle. After the locking lug (301) enters the inner side of the sleeve (220), the locking lug (301) abuts against the surface of the locking lug (221) to realize the connection and locking of the spindle head (200) and the rotating head seat (300).

5. The seamless, fitted frame sanding machine of claim 1, wherein, The thickness of the sleeve (220) gradually increases along the rotation direction of the spindle head (200), and the inner depth of the sleeve (220) is equal to the sum of the thicknesses of the locking lug (221) and the locking lug (301).

6. The seamless, fitted frame sanding machine of claim 1, wherein, When the spindle head (200) and the rotating head seat (300) are engaged, the inner wall of the locking lug (221) on the inner side of the sleeve (220) slides against the outer periphery of the rotating head seat (300), and the outer periphery of the locking lug (301) slides against the inner wall of the sleeve (220).

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