Universal connecting structure between polishing head and handle

Abstract

The utility model discloses a universal connecting structure between a polishing head and a handle, which comprises the polishing head, the top of the polishing head is connected with a mounting seat, the top of the mounting seat is provided with a connecting block, the top of the connecting block is provided with a motor, and the connecting block on one side of the motor is connected with a fixing column. The fixing column comprises a lower cylinder and two symmetrically-arranged stand columns connected to the top of the lower cylinder, a first rotating block is rotationally arranged between the two stand columns through a first rotating shaft, a second rotating body is rotationally arranged on the first rotating block through a second rotating shaft, and a bent connecting rod is fixedly connected to the outer side wall of the second rotating body. One end of the bent connecting rod is fixedly connected with a handle; according to the utility model, the handle can freely rotate in multiple directions through the design of double rotating shafts, and is suitable for different angles and complex operation scenes, especially for narrow areas such as wall corners and ceilings; the arc-shaped avoiding design of the bent connecting rod ensures that the motor and the handle have no structural conflict, and the effective working range is expanded.

Description

Technical Field

[0001] This utility model relates to the field of wall sander technology, specifically a universal connection structure between a sanding head and a handle. Background Technology

[0002] During construction or renovation, wall surfaces often need to be sanded to achieve a smoother, finer, and more uniform finish. Traditionally, wall sanding was done entirely by hand, which was inefficient, labor-intensive, and time-consuming. With advancements in science and technology, wall sanders were invented: tools that replace the traditional method of manually sanding walls with sandpaper.

[0003] However, in traditional wall sanders, the connection between the handle and the sanding head often uses a rigid or limited-angle connection. When sanding walls, the angle between the handle and the sanding head must be considered, resulting in insufficient operational flexibility, especially when working in confined spaces or at complex angles, making it difficult to adjust the posture. In addition, structural interference can easily occur between the handle and components such as the motor, limiting the range of rotation and affecting sanding efficiency.

[0004] Chinese patent CN119658507A discloses a wall sander, in which a support assembly connected to the sanding component has a front fork connected to the drive mechanism. The front fork is located at one end of the connecting rod and is used to connect the drive mechanism 12 and the sanding head. It is the part of the wall sander that is close to the wall when sanding. However, due to the limitation of the front fork, the rotation direction and angle of the handle and the sanding head are restricted. This means that the rotation direction needs to be considered when sanding the wall. For example, when sanding two walls in a narrow space, the operator needs to frequently change the way the handle is held due to the limitation of the rotation angle of the handle and the sanding head, thereby reducing the sanding efficiency and sanding quality. Utility Model Content

[0005] The purpose of this invention is to solve the problems existing in the traditional wall sander when sanding walls, and to provide a universal connection structure between the sanding head and the handle.

[0006] This utility model achieves the above-mentioned objective through the following technical solution: a universal connection structure between a grinding head and a handle, including a grinding head, a mounting base connected to the top of the grinding head, a connecting block mounted on the top of the mounting base, a motor for driving the grinding head to rotate mounted on the top of the connecting block, a fixed column connected to the connecting block on one side of the motor, the fixed column including a lower cylinder and two symmetrically arranged columns connected to the top of the lower cylinder, a first rotating block rotatably mounted between the two columns via a first rotating shaft, a second rotating body rotatably mounted on the first rotating block via a second rotating shaft, a curved connecting rod for avoiding the motor fixedly connected to the outer wall of the second rotating body, and a handle fixedly connected to one end of the curved connecting rod.

[0007] Furthermore, the curved connecting rod includes an arc-shaped rod fixedly connected to the second rotating body, one end of which is connected to a fixing rod, which is fixedly connected to the handle by welding.

[0008] Furthermore, a connecting plate is provided between the connecting block and the fixing column. The connecting plate is fixedly installed on the top surface of the connecting block by screws, and the bottom of the fixing column is fixedly connected to the top of the connecting plate by welding.

[0009] Furthermore, the top surface of the mounting base is provided with a vacuum port, and a vacuum hose is connected to the vacuum port. The vacuum hose passes through the handle and is connected to an external vacuuming device.

[0010] Furthermore, an LED spotlight is installed on the top surface of the mounting base; a double-bead LED strip is provided on the inner surface of the outer ring of the mounting base.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. The dual-axis design allows the handle to rotate freely in multiple directions, adapting to different angles and complex working scenarios, and is especially suitable for narrow areas such as corners and ceilings.

[0013] 2. The curved connecting rod's arc-shaped avoidance design ensures no structural conflict between the motor and the handle, expanding the effective working range.

[0014] 3. After the handle is rotated, it can be parallel to the grinding head in multiple directions. When the handle is parallel to the grinding head, the operator can apply uniform pressure, making the grinding head fit the wall better, improving the grinding quality and efficiency, and saving the operator's physical strength. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0016] Figure 2This is a schematic diagram of the structure of the top of the grinding head in this utility model;

[0017] Figure 3 This is a schematic diagram of the universal joint structure in this utility model;

[0018] Figure 4 This is a schematic diagram of the universal joint structure in this utility model;

[0019] Figure 5 A top view showing the curved connecting rod avoiding the motor after the handle is turned toward it;

[0020] Figure 6 This is a top view of the handle after it has been rotated to be perpendicular to the motor.

[0021] Figure 7 This is a side view of the handle after it has been rotated in a direction perpendicular to the motor.

[0022] In the diagram: 1-Grinding head, 2-Mounting base, 3-Connecting block, 4-Motor, 5-Fixing column, 6-First rotating block, 7-Second rotating body, 8-Bent connecting rod, 9-Handle, 10-Connecting plate, 11-Dust suction interface, 12-Dust suction hose, 13-LED spotlight, 14-Double bead light strip, 51-Lower cylinder, 52-Column, 53-First rotating shaft, 61-Second rotating shaft, 81-Arc rod, 82-Fixing rod. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" 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 utility model 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 utility model.

[0025] Combination Figures 1 to 7The diagram illustrates a universal connection structure between a grinding head and a handle, comprising a grinding head 1, a mounting base 2 connected to the top of the grinding head 1, a connecting block 3 mounted on the top of the mounting base 2, and a motor 4 for driving the grinding head 1 to rotate mounted on the top of the connecting block 3. A fixing post 5 is connected to the connecting block 3 on one side of the motor 4. The fixing post 5 includes a lower cylinder 51 and two symmetrically arranged columns 52 connected to the top of the lower cylinder 51. A first rotating block 6 is rotatably mounted between the two columns 52 via a first rotating shaft 53. A second rotating body 7 is rotatably mounted on the first rotating block 6 via a second rotating shaft 61. A curved connecting rod 8 for avoiding the motor 4 is fixedly connected to the outer wall of the second rotating body 7. A handle 9 is fixedly connected to one end of the curved connecting rod 8. The handle 9 has a certain length, which allows the operator to easily lift the grinding head 1, which is used for grinding operations, to a certain height to be close to the wall located in front of or above the operator.

[0026] like Figure 3 As shown, the curved connecting rod 8 includes an arc-shaped rod 81 fixedly connected to the second rotating body 7. One end of the arc-shaped rod 81 is connected to a fixed rod 82, which is fixedly connected to the handle 9 by welding. The curved connecting rod 8 is fixedly connected to the outer wall of the handle 9 by welding, so that the operator can control the rotation of the handle 9 in four directions and multiple directions by holding the handle 9.

[0027] like Figure 2-4 As shown, one end of the curved connecting rod 8 is fixedly connected to the second rotating body 7 by welding, and the second rotating body 7 can rotate around the second rotation axis 61, driving the curved connecting rod 8 and the handle 9 to rotate by no less than 180°; Figure 5 As shown, when the handle 9 and the curved connecting rod 8 rotate toward the motor 4, the angle can reach 90°. At this time, the handle 9 is parallel to the bottom surface of the grinding head 1. Furthermore, the curved connecting rod 8 can avoid the motor 4 through the arc design of the arc rod 81 at the front, thus completing a larger angle of rotation. This also makes the handle parallel to the wall surface being sanded, and the pressure transmitted from the handle to the grinding head makes the grinding head fit the wall surface more closely for sanding.

[0028] like Figure 6-7 As shown, the second rotating body 7 drives the first rotating block 6 to rotate around the first rotating axis 53. This allows the handle 9 and the curved connecting rod 8 to rotate in the direction perpendicular to the motor 4, with a rotation angle of not less than 180°. Similarly, rotation can bring the handle 9 parallel to the bottom surface of the grinding head 1. Figure 7 As shown; additionally in Figure 7When the handle 9 is parallel to the bottom surface of the grinding head 1, the curved connecting rod 8 will be resisted by the connecting block 3. In this case, on the one hand, the height of the lower cylinder 51 of the fixed column 5 can be made higher, and on the other hand, a clearance groove can be opened on the connecting block 3 at the position where the curved connecting rod 8 and the connecting block 3 are in contact, so as to avoid the connecting block 3 from hindering the rotation of the curved connecting rod 8.

[0029] like Figure 1 and Figure 3 As shown, a connecting plate 10 is provided between the connecting block 3 and the fixing column 5. The connecting plate 10 is fixedly installed on the top surface of the connecting block 3 by screws, and the bottom of the fixing column 5 is fixedly connected to the top of the connecting plate 10 by welding. This facilitates the maintenance or replacement of the universal connection structure.

[0030] The top surface of the mounting base 2 is provided with a dust suction port 11, and a dust suction hose 12 is connected to the dust suction port 11. The dust suction hose 12 passes through the handle 9 and is connected to an external dust suction device. The handle 9 is a hollow tube type, and the dust suction hose 12 can be inserted into the handle 9. Its tail end is connected to an external dust suction device, so that the dust generated when the grinding head 1 is grinding can be sucked up in time, reducing dust pollution.

[0031] like Figure 2 As shown, an LED spotlight 13 is installed on the top surface of the mounting base 2, and a double-bead LED strip 14 is provided inside the outer ring surface of the mounting base 2. The wires of the LED spotlight 13, the double-bead LED strip 14 and the motor 4 can all be threaded into the hollow handle 9, and an on / off switch can be set on the handle 9 and connected to the wires to control the LED spotlight 13, the double-bead LED strip 14 and the motor 4.

[0032] Working principle: The double columns 52 of the fixed column 5 are connected to the first rotating block 6 through the first rotating shaft 53, forming the first rotational degree of freedom; the first rotating block 6 is connected to the second rotating body 7 through the second rotating shaft 61, providing the second rotational degree of freedom; the arc rod 81 of the curved connecting rod 8 avoids the motor 4, ensuring that the handle 9 can rotate around the grinding head 1 in multiple directions by no less than 180°. This not only allows the handle 9 to be used freely at multiple angles to drive the grinding head 1 to grind the wall, but also makes the grinding head fit more closely to the wall surface for grinding due to the pressure transmitted to the grinding head through the handle; the connecting block 3 is fixed to the fixed column 5 through the detachable connecting plate 10, which is convenient for maintenance and replacement; the dust suction interface 11 is connected to external equipment, and the dust suction hose 12 inserted into the handle 9 is used to absorb dust in real time; the LED spotlight 13 and the double bead light strip 14 are embedded in the mounting base 2, which directly illuminates the grinding area and improves the visibility of the operation.

[0033] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0034] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A universal connecting structure between a polishing head and a handle, comprising a polishing head (1), a mounting seat (2) is connected at the top of the polishing head (1), characterized in that: The top of the mounting base (2) is provided with a connecting block (3), the top of the connecting block (3) is provided with a motor (4) for driving the polishing head (1) to rotate, the connecting block (3) on one side of the motor (4) is connected with a fixed column (5), the fixed column (5) comprises a lower cylinder (51) and two symmetrical vertical columns (52) connected at the top of the lower cylinder (51), a first rotating block (6) is rotatably arranged between the two vertical columns (52) through a first rotating shaft (53), a second rotating body (7) is rotatably arranged on the first rotating block (6) through a second rotating shaft (61), a curved connecting rod (8) for avoiding the motor (4) is fixedly connected on the outer side wall of the second rotating body (7), and one end of the curved connecting rod (8) is fixedly connected with a handle (9).

2. The universal connection between the polishing head and the handle according to claim 1, characterized in that: The curved connecting rod (8) comprises an arc-shaped rod (81) fixedly connected with the second rotating body (7), one end of the arc-shaped rod (81) is connected with a fixed rod (82), and the fixed rod (82) is fixedly connected with the handle (9) by welding.

3. The universal connection between the polishing head and the handle according to claim 2, wherein: A connecting plate (10) is arranged between the connecting block (3) and the fixed column (5), the connecting plate (10) is fixedly installed on the top surface of the connecting block (3) by screws, and the bottom of the fixed column (5) is fixedly connected with the top of the connecting plate (10) by welding.

4. The universal connection between the polishing head and the handle according to claim 3, wherein: A dust suction interface (11) is arranged on the top surface of the mounting base (2), a dust suction hose (12) is connected to the dust suction interface (11), the dust suction hose (12) passes through the handle (9) and is connected with an external dust suction device.

5. The universal connection between the polishing head and the handle according to claim 4, wherein: An LED spotlight (13) is arranged on the top surface of the mounting base (2), and a double-bead light belt (14) is arranged in the outer ring surface of the mounting base (2). An LED spotlight (13) is arranged on the top surface of the mounting base (2), and a double-bead light belt (14) is arranged in the outer ring surface of the mounting base (2).

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