A device for polishing a desk top

Abstract

This utility model discloses a device for grinding and polishing office desks, relating to the field of polishing machines. The utility model includes a main body with a counterweight mechanism mounted on the upper back of the main body. The counterweight mechanism includes a mounting shell with a groove formed on the inner side of the mounting shell. A counterweight plate is slidably mounted inside the groove, and a slider is fixedly mounted above the counterweight plate. The slider protrudes from the outer side of the mounting shell through a slot. The counterweight plate slides laterally along the axial direction of the main body via the groove. This utility model, by using a laterally sliding counterweight plate on the back of the main body via a groove, allows the operator to dynamically adjust the center of gravity by directly pushing the slider. This effectively counteracts the torque imbalance problem caused by the motor being head-heavy and tail-light, significantly reducing the load on the operator's wrist. Furthermore, the counterweight plate is made of tungsten alloy, providing high-density counterweight within a limited space, ensuring stable and play-free adjustment.

Description

Technical Field

[0001] This utility model relates to the field of polishing machines, specifically a device for grinding and polishing office desks. Background Technology

[0002] A polishing machine is an electric tool that uses an electric motor to drive a polishing disc to rotate at high speed, which, in conjunction with polishing compound, rubs the surface of an object to remove oxide layers, shallow scratches, or enhance shine. Its core components include a power system, an adjustable speed device, and a quick-change grinding head interface to adapt to different materials and process requirements. Handheld polishing machines are highly flexible and suitable for small areas or detailed work. When operating one, both hands should be used to maintain balance, and the machine should be moved at a constant speed along the material's texture. Different types of polishing tools should be used. Safety is paramount, and wearing safety goggles, a dust mask, and shockproof gloves is essential.

[0003] Current polishing devices achieve different effects by replacing the polishing disc at the motor output end. However, a problem exists in actual operation: the drive motor is located at the end of the handheld polishing device, causing the center of gravity of the device to lean towards one side of the drive motor. When performing angle and edge grinding operations, the operator needs to overcome the influence of the biased center of gravity to maintain the balance of the polishing device, which puts extra strain on the operator's wrist. Therefore, the inventor urgently needs to design a mechanism that can adjust the center of gravity of the polishing device to reduce the load on the operator's wrist and improve its ease of use. Utility Model Content

[0004] Therefore, the purpose of this utility model is to provide a device for grinding and polishing office desks, so as to solve the technical problem that the center of gravity of the handheld polishing device shifts due to the position of the motor, which increases the burden of operation.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a desk tabletop grinding and polishing device, comprising a device body, a counterweight mechanism installed on the upper back of the device body, the counterweight mechanism comprising a mounting shell, a groove formed on the inner side of the mounting shell, a counterweight plate slidably mounted inside the groove, a slider fixedly disposed above the counterweight plate, and the slider protruding from the outer side of the mounting shell through a slot, the counterweight plate sliding laterally along the axial direction of the device body through the groove.

[0006] By adopting the above technical solution, the counterweight mechanism installed on the back of the main body of the device slides the counterweight plate laterally through the slide groove, allowing the operator to dynamically adjust the center of gravity of the equipment according to the working conditions. When polishing the edge of the table or the inclined surface, the slider is pushed to change the position of the counterweight plate in the axial direction of the main body of the device, directly offsetting the problem of front-heavy and rear-light caused by the weight of the motor end. At the same time, the sliding structure is integrated into the mounting shell, avoiding interference from external mechanical parts. This maintains the overall compactness of the device and ensures the instantaneous response of the center of gravity adjustment. By balancing the torque distribution, the force required by the wrist to maintain the stability of the equipment is significantly reduced, improving the comfort and control accuracy of long-term operation.

[0007] Furthermore, the counterweight plate is adapted to slide along the groove, and the counterweight plate is made of tungsten alloy.

[0008] By adopting the above technical solution and using high-density tungsten alloy as the material for the counterweight plate, the maximum counterweight efficiency is achieved within the limited slide space, ensuring that sufficient reverse torque is provided with minimal volume. At the same time, its precise fit design with the slide ensures that there is no shaking or jamming during the sliding process, avoiding the deviation of the polishing trajectory due to the instability of the counterweight. The high wear resistance also extends the service life of the counterweight mechanism, reduces the maintenance frequency caused by wear, and balances operational efficiency and economy.

[0009] Furthermore, the slider is the point where the operator applies force to the counterweight, and the surface of the slider is provided with friction texture.

[0010] By adopting the above technical solution, the slider, as the point of action for manual operation, is designed to protrude from the groove on the outside of the mounting shell, which conforms to ergonomic logic, making the adjustment action natural and without the need for tools. At the same time, the friction texture on its surface enhances the anti-slip properties of the finger contact surface, and even if wood chips or oil stains are attached during the polishing process, it can still provide reliable grip. This direct control mode simplifies the center of gravity adjustment process, shortens the preparation time, and improves the continuity of multi-angle operations.

[0011] Furthermore, the counterweight plate is engaged with the mounting housing via a locking mechanism to limit the position of the counterweight plate.

[0012] By adopting the above technical solution, the locking mechanism ensures that the counterweight is fixed immediately after adjustment, avoiding the counterweight slippage caused by polishing vibration or inertia. At the same time, its locking mechanism does not rely on external locks, and one-button operation allows for quick switching between center of gravity locking and unlocking without interrupting the work process. This structure effectively ensures the stability of the equipment under high-speed rotation and avoids uneven surface grinding depth or fluctuations in polishing quality caused by counterweight displacement.

[0013] Furthermore, the locking mechanism includes a movable groove, and a snap-fit ​​piece is movably disposed on the inner side of the movable groove. An elastic pad is elastically connected between the snap-fit ​​piece and the movable groove below, and the snap-fit ​​piece elastically abuts against the inner wall of the groove through the elastic pad.

[0014] By adopting the above technical solution, the locking mechanism uses an elastic pad to push the snap-fit ​​piece against the inner wall of the slide groove, and generates friction through pure mechanical deformation to fix the position, without the need for electric or pneumatic components, thus improving the reliability of the system.

[0015] Furthermore, the snap-fit ​​tab is provided with a pressing tab, which protrudes from the mounting housing through a slot.

[0016] By adopting the above technical solution, the protruding pressing plate allows the operator to press down and unlock it with a single finger, forming a "push-press linkage" operation loop with the slider. This self-locking design takes into account both efficient adjustment and stable maintenance, and is especially suitable for work scenarios where polishing angles are frequently switched.

[0017] Furthermore, a motor is installed at the end of the main body of the device, a polishing disc is installed at the output end of the motor, and a dust cover is provided on the outer side of the polishing disc. The upper side of the dust cover is connected to an external negative pressure dust collection device through a negative pressure pipe. An auxiliary handle is installed on one side of the motor, and one side of the main body of the device is electrically connected to an external power source through a power cord.

[0018] By adopting the above technical solutions, the coordinated setup of the dust cover and negative pressure pipe actively captures polishing dust, preventing it from escaping and polluting the environment, and protecting the operator's respiratory health. At the same time, the dual grip point layout of the auxiliary handle and the dynamic counterweight mechanism form a force couple balance system, which distributes the burden on the wrist through multi-point coordination. The overall layout modularly integrates the functions of center of gravity adjustment, dust collection, and human-machine interaction into the main body of the device, which avoids functional conflicts and maintains the integrated operability of the equipment, enabling efficient collaborative operation under complex working conditions.

[0019] In summary, the present invention has the following main advantages:

[0020] 1. This utility model features a counterweight plate that can slide laterally on the back of the main body of the device via a sliding groove. The operator can directly push the slider to dynamically adjust the center of gravity position, effectively counteracting the torque imbalance problem caused by the motor being heavy at the head and light at the tail, and significantly reducing the load on the operator's wrist. At the same time, the counterweight plate is made of tungsten alloy material, providing high-density counterweight in a limited space, ensuring a stable and non-misaligned adjustment process.

[0021] 2. This utility model uses a locking mechanism where an elastic pad pushes a snap-fit ​​plate to automatically lock the counterweight position. The snap-fit ​​can be quickly released by pressing the plate, ensuring the stability of the counterweight under polishing vibration conditions. At the same time, the friction texture on the slider surface enhances the anti-slip properties of manual adjustment, allowing the center of gravity adjustment process to be completed in one go without the need for tools. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0023] Figure 2 This is a side view of the structure of this utility model;

[0024] Figure 3 This is a cross-sectional structural diagram of the present invention;

[0025] Figure 4 This utility model Figure 3 A magnified structural diagram of point A in the middle.

[0026] In the diagram: 1. Main body of the device; 2. Motor; 3. Dust cover; 4. Negative pressure pipe; 5. Secondary handle; 6. Counterweight mechanism; 601. Slide groove; 602. Counterweight plate; 603. Slot; 604. Slider; 605. Friction texture; 606. Movable groove; 607. Snap-fit ​​piece; 608. Pressing piece; 609. Elastic pad; 610. Mounting housing; 7. Power cord. Detailed Implementation

[0027] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0028] Example 1:

[0029] A device for sanding and polishing office desks, such as Figure 1-4 As shown, the device includes a main body 1. A counterweight mechanism 6 is mounted on the upper back of the main body 1. The counterweight mechanism 6 includes a mounting housing 610. A groove 601 is formed on the inner side of the mounting housing 610. A counterweight plate 602 is slidably mounted inside the groove 601. A slider 604 is fixedly mounted above the counterweight plate 602, and the slider 604 protrudes from the outer side of the mounting housing 610 through a slot 603. The counterweight plate 602 slides laterally along the axial direction of the main body 1 through the groove 601. The counterweight mechanism 6 mounted on the back of the main body 1 slides the counterweight plate 602 laterally through the groove 601. This allows the operator to dynamically adjust the center of gravity of the equipment according to the working conditions. When polishing the edge of the table or the inclined surface, the slider 604 is pushed to change the position of the counterweight 602 in the axial direction of the main body 1 of the device, directly offsetting the problem of front-heavy and tail-light caused by the weight of the motor 2. At the same time, the sliding structure is integrated into the mounting housing 610 to avoid interference from external mechanical parts. This maintains the overall compactness of the device and ensures the instantaneous response of the center of gravity adjustment. By balancing the torque distribution, the force required by the wrist to maintain the stability of the equipment is significantly reduced, improving the comfort and control accuracy of long-term operation.

[0030] See Figure 3 , Figure 4 The counterweight 602 is adapted to slide in the groove 601. The counterweight 602 is made of tungsten alloy. Using high-density tungsten alloy as the material of the counterweight 602 achieves maximum counterweight efficiency within the limited space of the groove 601, ensuring that sufficient reverse torque is provided with minimal volume. At the same time, its precise fit design with the groove 601 ensures that there is no shaking or jamming during the sliding process, avoiding the deviation of the polishing trajectory due to unstable counterweight. The high wear resistance also extends the service life of the counterweight mechanism 6, reduces the maintenance frequency caused by wear, and balances operating efficiency and economy.

[0031] See Figure 3 , Figure 4 The slider 604 is the point where the operator applies force to the counterweight 602. The surface of the slider 604 is provided with friction texture 605. As the point of manual operation, the slider 604 is designed to protrude from the slot 603 on the outside of the mounting housing 610, which conforms to ergonomic logic, making the adjustment action natural and without the need for tools. At the same time, the friction texture 605 on its surface enhances the anti-slip properties of the finger contact surface, and can still provide reliable grip even if wood chips or oil stains are attached during the polishing process. This direct control mode simplifies the center of gravity adjustment process, shortens the preparation time, and improves the continuity of multi-angle operations.

[0032] Example 2:

[0033] See Figure 3 , Figure 4 The counterweight 602 is engaged with the mounting housing 610 via a locking mechanism to limit the position of the counterweight 602. The locking mechanism ensures that the counterweight 602 is immediately fixed after adjustment, preventing the counterweight from sliding due to polishing vibration or inertia. At the same time, its engagement mechanism does not rely on external locks, and one-button operation allows for quick switching between center of gravity locking and unlocking without interrupting the work process. This structure effectively ensures the stability of the equipment under high-speed rotation and avoids uneven surface polishing depth or fluctuations in polishing quality caused by counterweight displacement.

[0034] See Figure 3 , Figure 4 The locking mechanism includes a movable groove 606, with a snap-fit ​​piece 607 movably disposed on the inner side of the movable groove 606. An elastic pad 609 is elastically connected between the snap-fit ​​piece 607 and the movable groove 606. The snap-fit ​​piece 607 elastically abuts against the inner wall of the slide groove 601 through the elastic pad 609. The locking mechanism uses the elastic pad 609 to push the snap-fit ​​piece 607 against the inner wall of the slide groove 601, and fixes the position by generating friction through pure mechanical deformation. No electric or pneumatic components are required, which improves the reliability of the system.

[0035] See Figure 3 , Figure 4The snap-fit ​​piece 607 is provided with a pressing piece 608. The pressing piece 608 protrudes from the mounting housing 610 through the slot 603. The protruding pressing piece 608 allows the operator to press down and unlock with one finger, forming a "push-press linkage" operation closed loop with the slider 604. This self-locking design takes into account both efficient adjustment and stable maintenance, and is especially suitable for work scenarios where the polishing angle is frequently switched.

[0036] See Figure 1 , Figure 2 The device body 1 has a motor 2 installed at one end, a polishing disc installed at the output end of the motor 2, and a dust cover 3 covering the outer side of the polishing disc. The upper side of the dust cover 3 is connected to an external negative pressure dust collection device through a negative pressure pipe 4. A secondary handle 5 is installed on one side of the motor 2, and the device body 1 is electrically connected to an external power source through a power cord 7. The coordinated setup of the dust cover 3 and the negative pressure pipe 4 actively captures polishing dust, preventing it from escaping and polluting the environment, and protecting the operator's respiratory health. At the same time, the dual grip point layout of the secondary handle 5 and the dynamic counterweight mechanism 6 form a force couple balance system, which distributes the wrist load through multi-point coordination. The overall layout modularly integrates the functions of center of gravity adjustment, dust collection, and human-machine interaction into the device body 1, which avoids functional conflicts and maintains the integrated operability of the equipment, enabling efficient collaborative operation under complex working conditions.

[0037] The implementation principle of this embodiment is as follows: Before operation, the operator connects to an external power source via power cord 7, holds the main handle and auxiliary handle 5 of the main body 1 of the device, and starts the motor 2 to drive the polishing disc to rotate. When polishing the edge or inclined surface, the operator manually pushes the slider 604 to make the counterweight 602 slide laterally along the slide groove 601 to adjust the center of gravity position to balance the bias torque at the end of the motor 2. After adjustment, the locking piece 607 automatically pops up under the action of the elastic pad 609 and locks into the inner wall of the slide groove 601. During the polishing process, the dust cover 3 covers the polishing area, and the dust is sucked by the external dust collection device through the negative pressure pipe 4. If the polishing disc needs to be replaced, the mounting structure at the output end of the motor 2 can be directly disassembled. By dynamically adjusting the position of the counterweight 602, the wrist load is significantly reduced and the operation stability is improved.

[0038] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, and variations are within the scope of the claims of the present invention and are protected by patent law.

Claims

1. A device for grinding and polishing office desk panels, characterized in that: The device includes a main body (1), and a counterweight mechanism (6) is installed on the upper back of the main body (1). The counterweight mechanism (6) includes a mounting shell (610), and a groove (601) is formed on the inner side of the mounting shell (610). A counterweight plate (602) is slidably installed inside the groove (601). A slider (604) is fixedly installed above the counterweight plate (602), and the slider (604) protrudes from the outer side of the mounting shell (610) through a slot (603). The counterweight plate (602) slides laterally along the axial direction of the main body (1) through the groove (601).

2. The office desk tabletop grinding and polishing device according to claim 1, characterized in that: The counterweight (602) is adapted to slide in the groove (601), and the counterweight (602) is made of tungsten alloy.

3. The office desk tabletop grinding and polishing device according to claim 1, characterized in that: The slider (604) is the point where the operator applies force to the counterweight (602), and the surface of the slider (604) is provided with friction texture (605).

4. The office desk tabletop grinding and polishing device according to claim 1, characterized in that: The counterweight (602) engages with the mounting housing (610) via a locking mechanism to limit the position of the counterweight (602).

5. The office desk tabletop grinding and polishing device according to claim 4, characterized in that: The locking mechanism includes a movable groove (606), and a snap-fit ​​piece (607) is movably disposed on the inner side of the movable groove (606). An elastic pad (609) is elastically connected between the bottom of the snap-fit ​​piece (607) and the movable groove (606). The snap-fit ​​piece (607) elastically abuts against the inner wall of the slide groove (601) through the elastic pad (609).

6. The office desk tabletop grinding and polishing device according to claim 5, characterized in that: The snap-fit ​​piece (607) is provided with a pressing piece (608), which protrudes from the mounting housing (610) through a slot (603).

7. The office desk tabletop grinding and polishing device according to claim 1, characterized in that: A motor (2) is installed at the end of the main body (1) of the device. A polishing disc is installed at the output end of the motor (2), and a dust cover (3) is provided on the outer side of the polishing disc. The upper side of the dust cover (3) is connected to an external negative pressure dust collection device through a negative pressure pipe (4). A secondary handle (5) is installed on one side of the motor (2), and one side of the main body (1) of the device is electrically connected to an external power source through a power cord (7).

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