Automobile grinding and polishing machine with adjustable grinding angle

Abstract

The invention discloses an automobile grinding and polishing machine capable of adjusting the grinding angle, and relates to the technical field of automobile grinding, the automobile grinding and polishing machine comprises a machine shell, an opening is formed in the side, perpendicular to a handle, of the machine shell, the opening and the machine shell form a hollow built-in cavity, a motor is fixedly installed on one side in the cavity of the machine shell, and an output shaft of the motor faces the side of the opening; an output shaft of the motor is fixedly connected with a connecting block, the other side of the connecting block is rotationally connected with a first steering block, and the two sides of the first steering block extend to form protruding parts. The movable cover is fixedly connected with the second steering block, and a hinge linkage structure between the first steering block and the second steering block is utilized, so that when the movable cover is manually rotated, the second steering block is driven to deflect, and the first steering block adaptively swings along with the second steering block, so that the flexible adjustment of the polishing angle of the polishing frame is realized; the device adapts to fitting and polishing of complex arc-shaped curved surfaces such as vehicle doors.

Description

Technical Field

[0001] This invention relates to the field of automotive polishing technology, and more particularly to an automotive polishing machine with an adjustable polishing angle. Background Technology

[0002] Automotive grinding and polishing machines are electric or pneumatic mechanical devices specifically designed for automotive surface treatment. They use high-speed rotating grinding pads, sanding discs, or polishing discs to perform coarse grinding (removing scratches, rust, and old paint) and fine polishing (improving smoothness and mirror-like shine) on car paint and sheet metal.

[0003] When polishing car door handles, small polishing machines are generally used. When using them, the polishing position angle needs to be adjusted according to the change of the slope. Ordinary polishing machines cannot adjust the angle between the polishing head and the polishing machine, so they cannot flexibly match the arc or concave and convex parts of the door handle, which can easily lead to uneven polishing or omissions due to the fixed angle. Summary of the Invention

[0004] To overcome the shortcomings of uneven or missed polishing of details, this invention provides an automotive polishing machine with an adjustable polishing angle.

[0005] An adjustable grinding angle car polishing machine includes a housing with a handle. An opening is located on one side of the housing perpendicular to the handle, forming a hollow, internal chamber. A motor is fixedly installed on one side of the chamber, with its output shaft facing the opening. A connecting block is fixedly connected to the motor output shaft, and a first steering block is rotatably connected to the other side of the connecting block. Both sides of the first steering block have extended protrusions, which are rotatably connected to a second steering block and the connecting block respectively through shaft holes. The extended protrusions are equipped with a tension adjustment structure that expands outward under force. A placement channel is provided within the protrusion, and a threaded adjustment mechanism is provided inside the placement channel. During use, the threaded adjustment mechanism is used to adjust the tension of the tension adjustment structure. A polishing frame is fixedly connected to the side of the second steering block away from the first steering block. A movable cover is fixedly connected to the opening of the housing, and the movable cover is rotatably connected to the polishing frame.

[0006] As a further preferred embodiment, the placement channel within the threaded adjustment mechanism is a through hole, with internal threads on both ends of its inner wall. Two bolts are screwed into the internal threads from both ends and arranged symmetrically along the axis. The end of the bolt adjacent to the pressing block is provided with a hexagonal groove. In use, the tightness of the connection between the first steering block, the second steering block, and the connecting block is adjusted by rotating the bolt with a hexagonal wrench to press the tightness adjustment structure.

[0007] As a further preferred embodiment, the tension adjustment structure that expands outward under force is the compression block, which is circumferentially and evenly arranged at one end of the protrusion of the first steering block. One side of the compression block is an inclined surface, which cooperates with the thread adjustment mechanism.

[0008] As a further preferred option, the tension adjustment structure that expands outward under force can also be a compression ring, which is fixedly connected to one end of the protrusion of the first steering block, with one side of the compression ring being the inclined surface.

[0009] As a further preferred embodiment, a reset frame is also included, which is slidably connected inside the housing and slidably connected to the connecting block, with a first spring fitted between the reset frame and the housing.

[0010] As a further preferred embodiment, one side of the reset frame is a horn-shaped expansion portion used to correct the deflection angle between the first steering block and the second steering block, and the other side of the expansion portion is a limiting portion used to restrict the corrected first steering block and the second steering block to the same axis position. An ear-shaped pushing portion with one side protruding is formed between the expansion portion and the limiting portion.

[0011] As a further preferred embodiment, it also includes a connecting ring, which is fixedly connected to one side of the outer side of the housing. A retaining ring is rotatably connected inside the connecting ring, and the retaining ring is rotatably connected to the connecting ring. A second spring is sleeved between the connecting ring and the retaining ring.

[0012] The present invention has the following advantages: By fixing the movable cover to the second steering block and utilizing the hinged linkage structure between the first steering block and the second steering block, the present invention enables the second steering block to deflect when the movable cover is manually rotated, and the first steering block to swing accordingly, thereby realizing the flexible adjustment of the polishing angle of the polishing frame and adapting to the fitting polishing of complex curved surfaces such as car doors.

[0013] This invention achieves dynamic adjustment of the preload at the hinge by adjusting the oblique pushing fit between the end of the bolt and the inclined surface of the extrusion block, as well as the radial expansion effect between the extrusion block and the inner wall of the connecting part. When the hinge becomes loose due to wear, rotating the adjusting bolt pushes the extrusion block to expand radially, pressing the rotating shaft or connecting structure, thereby restoring the connection rigidity, eliminating shaking, and ensuring grinding accuracy.

[0014] The present invention uses the expansion part and the limiting part of the reset frame to work together to correct and limit the relative angle between the first steering block and the second steering block, so that they are restored to the state of being coaxial with the motor output shaft, effectively ensuring transmission smoothness and polishing accuracy.

[0015] This invention achieves automatic locking of the reset frame after it is in place by using an ear-shaped pushing part and a retaining ring, combined with the elastic reset function of the second spring, without the need for additional locking operations, thus improving ease of use. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0017] Figure 2 This is a three-dimensional structural diagram of the components of the present invention, including the housing, motor, and first steering block.

[0018] Figure 3 This is a three-dimensional structural diagram of the first steering block and bolt of the present invention.

[0019] Figure 4 This is a three-dimensional structural diagram of the first steering block, bolt, and extrusion ring of the present invention.

[0020] Figure 5 This is a three-dimensional structural diagram of the components of the present invention, including the first steering block, the reset frame, and the first spring.

[0021] Figure 6 This is a three-dimensional structural diagram of the first steering block, reset frame, and first spring of the present invention.

[0022] Figure 7 This is a three-dimensional structural diagram of the first steering block and the reset frame of the present invention.

[0023] Figure 8 This is a three-dimensional structural diagram of the components of the present invention, including the housing, connecting ring, and second spring.

[0024] Wherein: 1-housing, 2-motor, 201-connecting block, 3-first steering block, 301-second steering block, 3011-shaft hole, 302-extrusion block, 3021-extrusion ring, 303-inclined surface, 304-internal thread, 305-hexagonal groove, 4-polishing frame, 5-movable cover, 6-bolt, 7-reset frame, 8-first spring, 9-limiting part, 901-expansion part, 10-connecting ring, 11-clamping ring, 12-second spring. Detailed Implementation

[0025] The technical solution will be further described below with reference to specific embodiments. It should be noted that the terms "up," "down," "left," and "right" used in this document refer only to the position of the structure shown in the corresponding drawings. The serial numbers assigned to components in this document, such as "first," "second," etc., are only used to distinguish the described objects and have no sequential or technical meaning. Unless otherwise specified, terms such as "connection" and "linkage" in this application include both direct and indirect connections (linkages).

[0026] Example 1: An adjustable grinding angle automotive polishing machine, such as... Figures 1-4 As shown, the device includes a housing 1 with a handle protruding from its lower part. An opening is located on the left side of the housing 1 perpendicular to the handle, forming a hollow, internal cavity. A motor 2 is fixedly installed on the right side of the cavity, with its output shaft facing the opening. A connecting block 201 is fixedly connected to the left side of the motor 2's output shaft. A first steering block 3 is rotatably connected to the left side of the connecting block 201. The first steering block 3 has protrusions extending from both its upper and lower sides. These protrusions are circular and rotatably connected to a second steering block 301 and the connecting block 201 respectively via through-holes 3011. The extended protrusions are equipped with a tension adjustment structure that expands outwards under pressure. This tension adjustment structure is a pressing block 302, which is arc-shaped and circumferentially distributed at one end of the protrusions of the first steering block 3. The inner side of the pressing block 302 is an inclined surface 303, which cooperates with a threaded adjustment mechanism. Simultaneously, under pressure... The tension adjustment structure that expands outward can also be a compression ring 3021, which can be fixedly connected to one or both ends of the upper and lower protrusions of the first steering block 3. The inner side of the compression ring 3021 is the inclined surface 303, and a placement channel is provided in the protrusion. The placement channel is provided with a threaded adjustment mechanism. In use, the threaded adjustment mechanism is used to adjust the tension of the tension adjustment structure. The placement channel of the threaded adjustment mechanism is a through hole, and the inner walls of its upper and lower ends are provided with internal threads 304. Two bolts 6 are screwed into the internal threads 304 from both ends and are symmetrically arranged along the axis. The bolts 6 and the upper and lower ends are provided with hexagonal grooves 305. In use, the tension adjustment structure is squeezed by rotating the bolts 6 with a hexagonal wrench to adjust the tension at the connection of the first steering block 3, the second steering block 301 and the connecting block 201. A polishing frame 4 is fixedly connected to the left side of the second steering block 301, and a movable cover 5 is fixedly connected to the opening on the left side of the housing 1. The movable cover 5 is rotatably connected to the polishing frame 4.

[0027] When the curved part of the car door needs to be polished, the movable cover 5 is manually held and rotated at an angle. The movable cover 5 drives the second steering block 301 to rotate. The first steering block 3 deflects adaptively according to the angle of the second steering block 301. After the angle is adjusted, the motor 2 is started. The output shaft of the motor 2 drives the connecting block 201 to rotate, thereby driving the first steering block 3 to rotate. The power is transmitted to the second steering block 301 through the first steering block 3, and finally the polishing frame 4 is driven to rotate through the second steering block 301 to complete the polishing work.

[0028] Due to prolonged polishing, wear occurs between the protrusions of the first steering block 3 and the mating surface of the shaft hole 3011, causing loosening of the fit between the protrusions of the first steering block 3 and the shaft hole 3011. This results in shaking during polishing, affecting the polishing accuracy of the polishing frame 4. In this case, a hex wrench can be inserted into the hexagonal groove 305 to rotate the bolt 6 counterclockwise. The bolt 6 is then subjected to force and moves towards both ends along the axis of the through hole. During this movement, the bolt 6 presses against the inclined surface 303 of the pressing block 302, causing the pressing block 302 to expand radially and press against the inner wall of the shaft hole 3011 connection, thereby increasing the preload at the rotational connection of the connecting block 201, the first steering block 3, and the second steering block 301.

[0029] In summary, by fixing the movable cover 5 to the second steering block 301 and utilizing the hinged linkage structure between the first steering block 3 and the second steering block 301, when the movable cover 5 is manually rotated, the second steering block 301 is driven to deflect, and the first steering block 3 swings accordingly, thereby realizing the flexible adjustment of the polishing angle of the polishing frame 4 and adapting to the fitting polishing of complex curved surfaces such as car doors.

[0030] By adjusting the oblique pushing fit between the end of the bolt 6 and the inclined surface 303 of the extrusion block 302, and the radial expansion between the extrusion block 302 and the inner wall of the connecting part, the preload at the hinge can be dynamically adjusted. When the hinge becomes loose due to wear, rotating the bolt 6 will push the extrusion block 302 to expand radially, pressing the shaft or connecting structure, thereby restoring the connection rigidity, eliminating shaking, and ensuring grinding accuracy.

[0031] Example 2: Based on Example 1, as follows Figure 5 , Figure 6 and Figure 7 As shown, it also includes a reset frame 7, which is slidably connected to the upper part of the housing 1. The reset frame 7 is slidably connected to the connecting block 201. The left side of the reset frame 7 is a horn-shaped expansion part 901, which is used to correct the deflection angle between the first steering block 3 and the second steering block 301. The right side of the expansion part 901 is a limiting part 9, which is used to limit the corrected first steering block 3 and the second steering block 301 to the same axis position. A protruding ear-shaped pushing part is formed between the expansion part 901 and the limiting part 9. A first spring 8 is sleeved between the reset frame 7 and the housing 1.

[0032] like Figure 1 and Figure 8As shown, it also includes a connecting ring 10, which is fixedly connected to the upper part of the outer side wall of the housing 1. A retaining ring 11 is rotatably connected inside the connecting ring 10. The retaining ring 11 is rotatably connected to the connecting ring 10. The second spring 12 is sleeved between the connecting ring 10 and the retaining ring 11.

[0033] To ensure that the angle between the first steering block 3 and the second steering block 301 is limited to a position coaxial with the shaft of the motor 2, the specific operation is as follows: Manually push the ear-shaped pushing part of the reset frame 7 to the left, the first spring 8 is deformed and stretched under force, and during the leftward movement of the reset frame 7, the angle of deviation between the first steering block 3 and the second steering block 301 is corrected by the expansion part 901. Then, the first steering block 3 and the second steering block 301 are locked in a position coaxial with the motor 2 by the limiting part 9. At this time, the polishing frame 4 and the handle are in a perpendicular state.

[0034] As the ear-shaped pushing part of the reset frame 7 pushes to the left, it squeezes the retaining ring 11. The retaining ring 11 is reversed by force, and the second spring 12 is deformed by force. Subsequently, when the ear-shaped pushing part of the reset frame 7 reaches the leftmost position, it disengages from the retaining ring 11. The second spring 12 releases its stored energy, pushing the retaining ring 11 to rotate clockwise and reset. After the retaining ring 11 is reset, the back side of the inclined surface 303 of the retaining ring 11 abuts against the ear-shaped pushing part of the reset frame 7 to lock it.

[0035] When unlocking is required, manually rotate the retaining ring 11 to reverse it, releasing the lock on the reset frame 7. The first spring 8 releases its stored energy, thereby pulling the reset frame 7 to the right to its initial position. In summary, through the coordinated action of the expansion portion 901 and the limiting portion 9 of the reset frame 7, the relative angle between the first steering block 3 and the second steering block 301 is corrected and limited, restoring them to a state coaxial with the output shaft of the motor 2, effectively ensuring transmission smoothness and polishing precision. Through the ear-shaped pushing portion and the retaining ring 11, combined with the elastic reset function of the second spring 12, the reset frame 7 is automatically locked after it is in place, eliminating the need for additional locking operations and improving ease of use.

[0036] Although this disclosure has been shown and described with reference to specific exemplary embodiments thereof, those skilled in the art will understand that various changes in form and detail may be made to this disclosure without departing from the spirit and scope of the disclosure as defined by the appended claims and their equivalents. Therefore, the scope of this disclosure should not be limited to the above embodiments, but should be defined not only by the appended claims, but also by their equivalents.

Claims

1. An adjustable grinding angle car polishing machine, comprising a housing (1), the housing (1) having a handle, the housing (1) having an opening on the side perpendicular to the handle, the opening forming a hollow internal cavity with the housing (1), a motor (2) fixedly installed on one side of the cavity of the housing (1), the output shaft of the motor (2) facing the opening side, the output shaft of the motor (2) being fixedly connected to a connecting block (201), the other side of the connecting block (201) being rotatably connected to a first steering block (3), the first steering block (3) having protrusions extending on both sides; Its features are: The protrusion is rotatably connected to the second steering block (301) and the connecting block (201) respectively through the shaft hole (3011). The extended protrusion is provided with a tension adjustment structure that expands outward under force. A placement channel is provided inside the protrusion. A threaded adjustment mechanism is provided inside the placement channel. When in use, the threaded adjustment mechanism is used to adjust the tension of the tension adjustment structure. A polishing frame (4) is fixedly connected to the side of the second steering block (301) away from the first steering block (3). A movable cover (5) is fixedly connected to the opening of the housing (1). The movable cover (5) is rotatably connected to the polishing frame (4).

2. The adjustable grinding angle automotive polishing machine as described in claim 1, characterized in that: The placement channel inside the thread adjustment machine is a through hole, and the inner walls at both ends are provided with internal threads (304). Two bolts (6) are screwed into the internal threads (304) from both ends and arranged symmetrically along the axis. The end of the bolt (6) adjacent to the extrusion block (302) is provided with a hexagonal groove (305). In use, the bolt (6) is rotated by a hexagonal wrench to extrude the tightness adjustment structure, thereby adjusting the tightness of the connection between the first steering block (3), the second steering block (301) and the connecting block (201).

3. The adjustable grinding angle automotive polishing machine as described in claim 1, characterized in that: The tension adjustment structure that expands outward under force is the compression block (302). The compression block (302) is evenly arranged circumferentially at one end of the protrusion of the first steering block (3). One side of the compression block (302) is an inclined surface (303), which cooperates with the thread adjustment mechanism.

4. The adjustable grinding angle automotive polishing machine as described in claim 1, characterized in that: The tension adjustment structure that expands outward under force can also be a compression ring (3021), which is fixedly connected to one end of the protrusion of the first steering block (3), and one side of the compression ring (3021) is the inclined surface (303).

5. The automotive polishing machine with adjustable grinding angle as described in claim 1, characterized in that: It also includes a reset frame (7), which is slidably connected to the housing (1), and the reset frame (7) is slidably connected to the connecting block (201). A first spring (8) is sleeved between the reset frame (7) and the housing (1).

6. The automotive polishing machine with adjustable grinding angle as described in claim 5, characterized in that: The reset frame (7) has a horn-shaped expansion portion (901) on one side, which is used to correct the angle of deflection between the first steering block (3) and the second steering block (301). The expansion portion (901) has a limiting portion (9) on one side, which is used to limit the corrected first steering block (3) and the second steering block (301) to the same axis position. An ear-shaped pushing portion with one side protruding is formed between the expansion portion (901) and the limiting portion (9).

7. The adjustable grinding angle automotive polishing machine as described in claim 6, characterized in that: It also includes a connecting ring (10), which is fixedly connected to the outside of the housing (1). A retaining ring (11) is rotatably connected inside the connecting ring (10). The retaining ring (11) is rotatably connected to the connecting ring (10). A second spring (12) is sleeved between the connecting ring (10) and the retaining ring (11).

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