A polishing and grinding device for automotive finishing

Abstract

The present application relates to a kind of polishing and grinding device for car beauty, the device includes main body, motor is installed in main body, fixedly connected with square shaft, annular buckle table and driving bevel gear on motor output shaft, polishing roller mounting disc is rotatably connected on output shaft, polishing disc is installed on annular buckle table, two rotating mounting plates are connected with the lower surface of polishing roller mounting disc, polishing roller is rotatably installed between installation ring and rotating mounting plate, driven bevel gear is fixed on the rotating shaft of polishing roller, driving bevel gear and driven bevel gear meshing cooperation, polishing roller mounting disc is pressed on the upper surface of polishing disc, and polishing roller is located in the inside of polishing disc.The device can effectively meet the demand of large area polishing and local polishing by the cooperation of polishing roller and polishing disc, and the structure is simple and easy to operate, and practical.

Description

Technical Field

[0001] This invention relates to the field of polishing and grinding equipment technology, specifically to a polishing and grinding device for automotive detailing. Background Technology

[0002] Car polishing is an important step in the car detailing process, usually performed before waxing, glazing, or coating. After the car surface is painted, minor defects such as coarse particles, sandpaper marks, runs, and orange peel may appear on the paint film surface. Polishing is necessary to eliminate these defects, improve the mirror effect of the paint film, and achieve a bright and smooth finish.

[0003] Currently, the polishing and grinding devices widely used in the car detailing industry mainly include handheld polishers and stationary polishing equipment. Handheld polishers typically use a motor to drive a single polishing disc to rotate, and the operator holds the main unit to polish the car's surface. Although these devices are simple in structure and flexible in use, they rely solely on a single polishing disc for polishing. Smaller discs have lower polishing efficiency, and while larger discs can improve efficiency, they are inconvenient for polishing small areas or curved surfaces and edges, affecting the polishing effect. Summary of the Invention

[0004] In view of the problems existing in the prior art, the present invention discloses a polishing and grinding device for car detailing, including a main body, in which a motor and a control unit are installed, and the motor and the control unit are electrically connected. A top-pressure nut is threadedly installed at the lower end of the main body, and the output shaft of the motor rotates vertically downward and passes through the main body and the top-pressure nut.

[0005] A square shaft, an annular locking platform, and a drive bevel gear are fixedly connected sequentially from top to bottom on the output shaft located outside the main body. The square shaft, annular locking platform, and drive bevel gear are coaxially arranged with the output shaft. A threaded hole is opened on one side of the square shaft, and a pressure platform is fixedly connected to the upper part of the square shaft. A polishing roller mounting plate is rotatably connected to the output shaft between the square shaft and the annular locking platform. A polishing plate is axially fixedly mounted on the annular locking platform. A square hole is opened at the center of the upper surface of the polishing roller mounting plate, and a locking screw is threadedly installed on the side wall of the square hole corresponding to the threaded hole. A mounting ring is fixedly connected to the center of the lower surface of the polishing roller mounting plate through a connecting plate, and the mounting ring is rotatably connected to the output shaft. Two rotating mounting plates are symmetrically fixedly connected to the circumferential edge of the lower surface of the polishing roller mounting plate.

[0006] A polishing roller is rotatably mounted between the mounting ring and each of the rotating mounting plates. The shafts at both ends of the polishing roller are rotatably mounted on the mounting ring and the rotating mounting plates via bearings. A driven bevel gear is fixedly connected to the shaft near the driving bevel gear, and the driving bevel gear meshes with the driven bevel gear. The connecting plate and the rotating mounting plate are slidably inserted into the polishing disc, and the polishing roller mounting disc covers the upper surface of the polishing disc, with the polishing roller located inside the polishing disc.

[0007] In a preferred embodiment of the present invention, a main grip and an auxiliary grip are fixedly connected to both sides of the main body, and an external threaded head is fixedly connected to the lower end face of the main body. A central hole is formed along the axis of the external threaded head, and the output shaft rotates through the central hole. The top-pressure nut is threadedly installed on the external threaded head. When the polishing roller mounting plate moves down to engage the driven bevel gear with the driving bevel gear, the top-pressure nut is rotated to move it down and press against the upper surface of the polishing roller mounting plate, which can prevent the polishing roller mounting plate from sliding and causing the driven bevel gear to disengage from the driving bevel gear.

[0008] As a preferred embodiment of the present invention, the main grip is provided with a control switch electrically connected to the control unit.

[0009] In a preferred embodiment of the present invention, when the polishing roller mounting plate moves upward to engage the square hole on the square shaft, and the upper surface of the polishing roller mounting plate presses against the lower surface of the pressing table, the locking screw corresponds to the threaded hole. Tightening the locking screw in the threaded hole axially fixes the polishing roller mounting plate to the square shaft section. Thus, the cooperation between the square shaft and the square hole achieves circumferential fixation of the polishing roller mounting plate on the output shaft, allowing the output shaft to rotate and drive the polishing roller mounting plate and the polishing disc to rotate.

[0010] In a preferred embodiment of the present invention, the polishing disc has a gear cavity at its center and roller mounting grooves symmetrically formed on both sides along the radial direction. Each end of the roller mounting groove has a sliding elongated hole and an insertion groove. An annular retaining groove is coaxially formed at the top of the gear cavity, and through grooves are formed on both sides of the annular retaining groove. The roller mounting groove is open at the top and bottom, and the polishing roller is located within the roller mounting groove. The connecting plate is slidably inserted into the through groove, and the rotating mounting plate is slidably inserted into the insertion groove. Through the sliding insertion between the connecting plate and the rotating mounting plate and the polishing disc, the polishing roller mounting disc can slide axially on the polishing disc while remaining circumferentially fixed. The rotating shaft slides through the sliding elongated hole, and the driven bevel gear and the driving bevel gear are located in the gear cavity. The polishing disc is circumferentially rotated and axially fixed on the annular retaining platform via the annular retaining groove, allowing the polishing roller mounting disc to rotate on the annular retaining platform along with the polishing disc.

[0011] As a preferred embodiment of the present invention, polishing pads are attached to the lower surface of the polishing disc and the circumferential surface of the polishing roller respectively by Velcro. The polishing pads can be wool pads, polishing sponges, etc., depending on the process requirements.

[0012] In a preferred embodiment of the present invention, the two polishing rollers are coaxially arranged along the diameter direction of the polishing roller mounting disk, so that they are on the same straight line.

[0013] The beneficial effects of this invention are as follows: This invention allows for the adjustable mounting of polishing rollers on a polishing disc via a polishing roller mounting plate. The two polishing rollers can be retracted into the polishing disc by moving the mounting plate upwards. The mounting plate, in conjunction with the square shaft and locking screws, securely connects the polishing disc to the output shaft, enabling large-area polishing with greater efficiency, while the polishing rollers do not participate in the polishing process. For fine polishing of curved surfaces, sharp edges, and smaller areas, the locking screws are loosened, and the polishing roller mounting plate is lowered away from the square shaft. The polishing rollers then connect to the output shaft via the meshing of driven and driven bevel gears, extending from the lower surface of the polishing disc. The mounting plate and the polishing disc no longer rotate with the output shaft, switching to a state where the polishing disc remains stationary while the polishing rollers participate in the polishing process. This allows for localized fine polishing, improving the polishing effect on complex areas. This device achieves switching between two polishing modes through the cooperation of the polishing rollers and the polishing disc, effectively meeting the needs of both large-area and localized polishing. It is simple in structure, easy to operate, and highly practical. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a cross-sectional view of the internal structure of the polishing disc in the retracted state of the polishing roller according to the present invention. Figure 3 This is a cross-sectional view of the internal structure of the polishing disc in the extended state of the polishing roller according to the present invention. Figure 4 This is a schematic diagram of the output shaft structure of the present invention; Figure 5 This is a cross-sectional view of the polishing roller mounting disc and polishing disc structure of the present invention.

[0015] In the diagram: 1 Main body, 101 Main grip, 102 Auxiliary grip, 103 External thread head, 2 Motor, 201 Output shaft, 202 Square shaft, 203 Annular snap-fit ​​platform, 204 Driven bevel gear, 205 Threaded hole, 206 Top pressure platform, 3 Top pressure nut, 4 Polishing roller mounting plate, 401 Square hole, 402 Connecting plate, 403 Mounting ring, 404 Rotating mounting plate, 5 Polishing disc, 501 Roller body mounting groove, 502 Gear cavity, 503 Sliding elongated hole, 504 Annular snap-fit ​​groove, 505 Through groove, 506 Insertion groove, 6 Polishing roller, 601 Rotating shaft, 602 Driven bevel gear, 7 Locking screw. Detailed Implementation

[0016] Example 1 like Figures 1 to 5 As shown, the present invention is a polishing and grinding device for car detailing. The main body 1 has a hollow shell structure, and a motor 2 and a control unit (not shown in the figure) are installed in its inner cavity. The motor 2 is electrically connected to the control unit, and the control unit is used to control the start, stop and speed adjustment of the motor 2.

[0017] A main handle 101 and an auxiliary handle 102 are fixedly connected to both sides of the main body 1. A control switch (not shown in the figure) electrically connected to the control unit is provided on the main handle 101. The operator can control the operation of the device through the control switch on the main handle 101, and simultaneously hold the main handle 101 and the auxiliary handle 102 with both hands for polishing operations, ensuring stable and reliable operation. An external threaded head 103 is fixedly connected to the lower end face of the main body 1, and a central hole is formed along its axis on the external threaded head 103. A pressure nut 3 is threadedly installed on the lower end of the main body 1 through the external threaded head 103.

[0018] The output shaft 201 of motor 2 is vertically downward. The output shaft 201 rotatably passes through the center hole of the external threaded head 103 at the lower end of the main body 1 and the top pressure nut 3, extending to the outside of the main body 1. A square shaft 202, an annular locking platform 203, and a drive bevel gear 204 are sequentially fixedly connected from top to bottom on the output shaft 201 located outside the main body 1. The square shaft 202, annular locking platform 203, and drive bevel gear 204 are all coaxially arranged with the output shaft 201 and rotate together with it. A threaded hole 205 is provided on one side of the square shaft 202. A top pressure platform 206, which is disc-shaped, is fixedly connected to the upper part of the square shaft 202. A polishing roller mounting disc 4 rotatably passes through the output shaft 201 between the square shaft 202 and the annular locking platform 203. The polishing roller mounting disc 4 can slide up and down along the axial direction of the output shaft 201 and can rotate around the output shaft 201. The lower surface of the top pressure table 206 is used to axially limit the polishing roller mounting disc 4. The polishing disc 5 is axially fixed and rotates around the annular locking table 203. That is, the polishing disc 5 can rotate around the annular locking table 203, but is limited and fixed in the axial direction by the annular locking table 203.

[0019] A square hole 401 is provided at the center of the upper surface of the polishing roller mounting plate 4. The cross-sectional shape of the square hole 401 is adapted to the cross-sectional shape of the square shaft 202, so that the square hole 401 can be snapped onto the square shaft 202, thereby achieving circumferential fixation of the polishing roller mounting plate 4 and the output shaft 201. A locking screw 7 is threadedly installed on the side wall of the square hole 401 corresponding to the threaded hole 205. When the polishing roller mounting plate 4 moves upward, causing the square hole 401 to snap onto the square shaft 202, and the upper surface of the polishing roller mounting plate 4 to press against the lower surface of the pressing table 206, the locking screw 7 corresponds to the threaded hole 205. Tightening the locking screw 7 in the threaded hole 205 can axially fix the polishing roller mounting plate 4 to the section of the square shaft 202. Thus, through the cooperation between the square shaft 202 and the square hole 401, the polishing roller mounting plate 4 is circumferentially fixed on the output shaft 201, so that when the output shaft 201 rotates, it can drive the polishing roller mounting plate 4 and the polishing plate 5 to rotate.

[0020] A mounting ring 403 is fixedly connected to the center of the lower surface of the polishing roller mounting disk 4 via a connecting plate 402. The mounting ring 403 is rotatably connected to the output shaft 201. Two rotating mounting plates 404 are symmetrically fixedly connected to the circumferential edge of the lower surface of the polishing roller mounting disk 4. The two rotating mounting plates 404 are symmetrically arranged along the diameter direction of the polishing roller mounting disk 4. A polishing roller 6 is rotatably mounted between the mounting ring 403 and each rotating mounting plate 404. Specifically, the rotating shafts 601 at both ends of the polishing roller 6 are rotatably mounted on the mounting ring 403 and the rotating mounting plates 404 via bearings (not shown in the figure). The two polishing rollers 6 are coaxially arranged along the diameter direction of the polishing roller mounting disk 4, that is, the axes of the two polishing rollers 6 coincide with the diameter direction of the polishing roller mounting disk 4, and the two polishing rollers 6 are symmetrically arranged on both sides of the output shaft 201, so that the device is subjected to more balanced force and operates more smoothly during operation. A driven bevel gear 602 is fixedly connected to the rotating shaft 601 near the end of the driving bevel gear 204. Moving the polishing roller mounting plate 4 downwards allows the driving bevel gear 204 to mesh with the driven bevel gear 602. When the output shaft 201 rotates, the driving bevel gear 204 rotates accordingly, driving the driven bevel gear 602 to rotate through the meshing, thereby driving the polishing roller 6 to rotate around its own axis. When the polishing roller mounting plate 4 moves downwards to engage the driven bevel gear 602 with the driving bevel gear 204, rotating the pressure nut 3 causes it to move downwards and press against the upper surface of the polishing roller mounting plate 4. This prevents the polishing roller mounting plate 4 from sliding upwards and disengaging the driven bevel gear 602 from the driving bevel gear 204, ensuring the reliability of the transmission.

[0021] A gear cavity 502 is formed in the center of the polishing disc 5, and roller mounting grooves 501 are symmetrically formed on both sides radially. Sliding elongated holes 503 and insertion grooves 506 are formed at both ends of the roller mounting grooves 501, respectively. An annular groove 504 is coaxially formed on the top of the gear cavity 502, and through grooves 505 are formed on both sides of the annular groove 504. The roller mounting grooves 501 are open at the top and bottom. The polishing roller mounting disc 4 is pressed onto the upper surface of the polishing disc 5. The connecting plate 402 is slidably inserted into the through groove 505, and the rotating mounting plate 404 is slidably inserted into the insertion groove 506. Through the sliding insertion between the connecting plate 402 and the rotating mounting plate 404 and the polishing disc 5, the polishing roller mounting disc 4 can slide axially on the polishing disc 5 while remaining circumferentially fixed. The polishing roller 6 is located in the roller mounting groove 501. The polishing roller 6 can retract into the roller mounting groove 501 as the polishing roller mounting disc 4 moves upward. The polishing roller 6 does not extend from the lower opening of the roller mounting groove 501. The polishing roller 6 moves downward with the polishing roller mounting plate 4, and its lower part extends out from the lower opening of the roller mounting groove 501 and protrudes from the lower surface of the polishing disc 5. The rotating shaft 601 of the polishing roller 6 slides through the sliding elongated hole 503, and the driven bevel gear 602 and the driving bevel gear 204 are located in the gear cavity 502. The polishing disc 5 is circumferentially and axially fixed on the annular locking platform 203 through the annular locking groove 504, so that the polishing roller mounting plate 4 can rotate on the annular locking platform 203 along with the polishing disc 5.

[0022] Polishing pads are attached to the lower surface of polishing disc 5 and the circumference of polishing roller 6 using Velcro. The polishing pads can be selected from wool pads, polishing sponges, etc., according to the process requirements to adapt to different polishing needs.

[0023] The working principle of this invention is as follows: During use, the operator selects the working mode of the polishing roller 6 according to the polishing requirements. When fine polishing is required, the locking screw 7 is not connected to the threaded hole 205, causing the polishing roller mounting plate 4 to move downwards. The square hole 401 disengages from the square shaft 202, and the driven bevel gear 602 meshes with the driving bevel gear 204. The lower part of the polishing roller 6 extends out from the lower opening of the roller body mounting groove 501 and protrudes from the lower surface of the polishing plate 5. Then, the top pressure nut 3 is rotated to move downwards and press against the upper surface of the polishing roller mounting plate 4, locking the axial position of the polishing roller mounting plate 4. The operator holds the main handle 101 and the auxiliary handle 102 with both hands and places the device above the car paint surface to be polished. The motor 2 is started by the control switch on the main grip 101. The output shaft 201 of the motor 2 starts to rotate, driving the drive bevel gear 204 to rotate. The drive bevel gear 204 and the driven bevel gear 602 drive the polishing roller 6 to rotate. The polishing disc 5 and the polishing roller mounting disc 4 do not rotate with the output shaft 201. Polishing is performed by the part of the polishing roller 6 that protrudes from the lower surface of the polishing disc 5. The polished surface is a line, which is convenient for local fine polishing.

[0024] When large-area polishing is required, tighten the top nut 3 to move it upwards, then move the polishing roller mounting plate 4 upwards. The square hole 401 snaps into the square shaft 202, and the upper surface of the polishing roller mounting plate 4 presses against the lower surface of the top pressure table 206. The locking screw 7 is tightened into the threaded hole 205, allowing the polishing roller mounting plate 4 to rotate together with the square shaft 202. The driven bevel gear 602 disengages from the driving bevel gear 204, and the polishing roller 6 moves upwards with the polishing roller mounting plate 4 and retracts into the roller mounting groove 501. When the output shaft 201 rotates, the polishing roller mounting plate 4 drives the polishing disc 5 to rotate together with the square shaft 202. The polishing roller 6 no longer rotates on its own, thus using the polishing disc 5 for polishing.

[0025] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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. Therefore, they should not be construed as limitations on this invention. In addition, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0026] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation", "connection", and "linking" 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 connection of two components. For those skilled in the art, the specific meaning of the above terms in this invention can be understood through the specific circumstances.

[0027] Components and electronic control parts not described in detail in this article are existing technologies.

[0028] While the specific embodiments of the present invention have been described in detail above, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention, and modifications or variations without creative effort are still within the protection scope of the present invention.

Claims

1. A polishing and grinding device for car detailing, comprising a main body (1), wherein a motor (2) and a control unit are installed in the inner cavity of the main body (1), the motor (2) being electrically connected to the control unit, characterized in that, The lower end of the main body (1) is threaded with a top pressure nut (3). The output shaft (201) of the motor (2) rotates vertically downwards and passes through the main body (1) and the top pressure nut (3). On the output shaft (201) located outside the main body (1), a square shaft (202), an annular locking platform (203), and a drive bevel gear (204) are fixedly connected from top to bottom. The square shaft (202), the annular locking platform (203), and the drive bevel gear (204) are coaxial with the output shaft (201). (202) A threaded hole (205) is provided on one side of the square shaft (202). A top pressure table (206) is fixedly connected to the upper part of the square shaft (202). A polishing roller mounting plate (4) is rotatably connected between the square shaft (202) and the annular snap-fit ​​table (203) on the output shaft (201). A polishing disc (5) is axially fixedly mounted on the annular snap-fit ​​table (203) in a circumferential rotational direction. A square hole (401) is provided at the center of the upper surface of the polishing roller mounting plate (4). A thread is provided on the side wall of the square hole (401) corresponding to the threaded hole (205). With locking screws (7) installed, a mounting ring (403) is fixedly connected to the center of the lower surface of the polishing roller mounting plate (4) via a connecting plate (402). The mounting ring (403) is rotatably connected to the output shaft (201). Two rotating mounting plates (404) are symmetrically fixedly connected to the circumferential edge of the lower surface of the polishing roller mounting plate (4). A polishing roller (6) is rotatably mounted between the mounting ring (403) and each of the rotating mounting plates (404). The rotating shafts (601) at both ends of the polishing roller (6) rotate via bearings. A driven bevel gear (602) is fixedly connected to a rotating shaft (601) near one end of the driving bevel gear (204) and mounted on the mounting ring (403) and the rotating mounting plate (404). The driving bevel gear (204) meshes with the driven bevel gear (602). The connecting plate (402) and the rotating mounting plate (404) are slidably inserted into the polishing disc (5). The polishing roller mounting disc (4) covers the upper surface of the polishing disc (5). The polishing roller (6) is located inside the polishing disc (5).

2. The polishing and grinding device for car detailing according to claim 1, characterized in that: The main body (1) is fixedly connected to a main handle (101) and an auxiliary handle (102) on both sides respectively. The lower end face of the main body (1) is fixedly connected to an external thread head (103). A central hole is opened on the external thread head (103) along the axis. The output shaft (201) rotates through the central hole. The top pressure nut (3) is threadedly installed on the external thread head (103).

3. The polishing and grinding device for car detailing according to claim 2, characterized in that: The main grip (101) is provided with a control switch that is electrically connected to the control unit.

4. The polishing and grinding device for car detailing according to claim 1, characterized in that: When the polishing roller mounting plate (4) moves upward, the square hole (401) is engaged on the square shaft (202), and when the upper surface of the polishing roller mounting plate (4) presses against the lower surface of the pressing table (206), the locking screw (7) corresponds to the threaded hole (205).

5. The polishing and grinding device for car detailing according to claim 1, characterized in that: The polishing disc (5) has a gear cavity (502) at its center and roller mounting grooves (501) symmetrically arranged radially on both sides. Sliding elongated holes (503) and insertion grooves (506) are respectively opened at both ends of the roller mounting grooves (501). An annular groove (504) is coaxially opened at the top of the gear cavity (502), and through grooves (505) are opened on both sides of the annular groove (504). The roller mounting grooves (501) are open at the top and bottom, and the polishing roller (6) is located in the roller mounting grooves (501). In 01), the connecting plate (402) is slidably inserted into the through groove (505), the rotating mounting plate (404) is slidably inserted into the insertion groove (506), the rotating shaft (601) slides through the sliding elongated hole (503), the driven bevel gear (602) and the driving bevel gear (204) are located in the gear cavity (502), and the polishing disc (5) is circumferentially rotated and axially fixed on the annular buckle platform (203) through the annular slot (504).

6. The polishing and grinding device for car detailing according to claim 1, characterized in that: Polishing pads are attached to the lower surface of the polishing disc (5) and the circumferential surface of the polishing roller (6) by Velcro.

7. The polishing and grinding device for car detailing according to claim 1, characterized in that: The two polishing rollers (6) are arranged coaxially along the diameter direction of the polishing roller mounting plate (4).

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