Handheld wall polishing device

Abstract

The present invention discloses a handheld wall grinding device, which relates to the field of wall grinding equipment. The technical solution is as follows: the handheld wall grinding device includes an operating handle, a driving motor and a grinding head, and is characterized in that the grinding head includes a dust cover, a transmission mechanism is arranged in the dust cover, the input end of the transmission mechanism is coaxially fixed with the output shaft of the driving motor, the output end of the transmission mechanism is coaxially fixed with a grinding disc, sandpaper is installed on the grinding disc, and an adjustment mechanism for adjusting the position of the grinding disc is arranged on the outside of the transmission mechanism; a dust discharge port is arranged on one side of the dust cover, a dust discharge pipe is arranged on the dust discharge port, one end of the dust discharge pipe is connected to a hose, and the hose is connected to a dust collection bag; the handheld wall grinding device also includes a switching unit arranged outside the dust cover, and the switching unit is used to switch the grinding state of the grinding head. The beneficial effects of the present invention are: simple structure, easy to use, capable of switching between coarse grinding and fine grinding modes, convenient for adjustment according to actual construction needs, and effectively improving grinding efficiency.

Description

Technical Field

[0001] The present invention relates to the field of wall polishing equipment, in particular to a handheld wall polishing device. Background Art

[0002] Before applying paint or plaster to building walls, the rough, uneven surfaces need to be sanded to facilitate subsequent painting. Manual wall sanding has long been a physically demanding task in building renovation projects. It not only requires high physical strength but also poses health risks due to the dust generated during the sanding process. Manual sanding also suffers from low efficiency, poor sanding quality, and excessive indoor dust. Existing sanders generally only have a single sanding disc and cannot be adjusted to meet different sanding requirements. Summary of the Invention

[0003] In view of the above technical problems, the present invention provides a handheld wall polishing device.

[0004] The technical solution is as follows: it includes an operating handle, a drive motor and a grinding head, and is characterized in that the grinding head includes a dust cover, a transmission mechanism is arranged in the dust cover, the input end of the transmission mechanism is coaxially fixed with the output shaft of the drive motor, the output end of the transmission mechanism is coaxially fixed with a grinding disc, sandpaper is installed on the grinding disc, and an adjustment mechanism for adjusting the position of the grinding disc is arranged on the outer side of the transmission mechanism;

[0005] A dust discharge port is provided on one side of the dust cover, a dust discharge pipe is provided on the dust discharge port, one end of the dust discharge pipe is connected to a hose, and the hose is connected to a dust collecting bag;

[0006] It also includes a switching unit arranged outside the dust cover, and the switching unit is used for switching the grinding state of the grinding head.

[0007] Preferably, the transmission mechanism includes an active plate coaxially fixedly connected to the output shaft of the drive motor, two connecting rods are rotatably provided on the plate body of the active plate, one end of each connecting rod is rotatably connected to the active plate, and the other end is rotatably provided with a linkage plate, the linkage plate is in a "cross" shape, and the two opposite ends of the linkage plate are rotatably connected to one of the connecting rods respectively;

[0008] The linkage plate has a long groove fixedly provided on its plate body, a driving plate is slidably provided in the long groove, and two sliding rods are fixedly provided on the plate body of the driving plate, and both sliding rods slide in the long groove;

[0009] A grinding disc is coaxially fixedly arranged on the side of the driving plate away from the sliding rod through a transmission shaft.

[0010] Preferably, an adjustment mechanism for adjusting the position of the grinding disc is provided on the outside of the transmission mechanism, the adjustment mechanism includes a planetary gear set provided in a dust cover, the sun gear of the planetary gear set is sleeved on the outside of the output shaft of the drive motor and is coaxial with the output shaft of the drive motor, the gear rack of the planetary gear set is fixed to the dust cover, and an adjustment plate is fixed on the ring gear of the planetary gear set, and the adjustment plate is located below the drive plate;

[0011] It also includes a switching unit arranged outside the dust cover.

[0012] Preferably, a guide groove is provided on the plate body of the adjustment plate, a slider is slidably provided in the guide groove, a through hole is provided in the middle of the slider, and the through hole is rotatably connected to the transmission shaft;

[0013] It also includes an adjustment unit arranged on the adjustment plate.

[0014] Preferably, the switching unit includes a commutator slidably arranged on the output shaft of the drive motor, the commutator and the output shaft of the drive motor are radially fixed and axially slidable, a plurality of driving teeth are arranged in an array on the lower surface of the commutator, and a plurality of driven teeth are arranged in an array on the upper surface of the sun gear;

[0015] A groove is provided on the outer side of the commutator, a shift fork is provided on one side of the commutator, the middle part of the shift fork is rotatably connected to the drive motor, a semicircular shift rod is provided at one end of the shift fork, and a ball is rotatably provided at each end of the shift rod, and the ball rolls in the groove.

[0016] Preferably, a nut is rotatably provided at one end of the shift fork away from the shift rod, the internal thread of the nut is connected to an adjusting bolt, and a transfer seat is rotatably provided at the lower end of the adjusting bolt, and the transfer seat is rotatably connected to the drive motor.

[0017] Preferably, the adjustment unit includes two sprockets rotatably arranged on the adjustment plate body, the two sprockets are connected by a chain, and one link of the chain is fixedly connected to the slider;

[0018] An adjusting knob is fixedly arranged on each of the sprockets.

[0019] Preferably, an isolation brush is circumferentially provided at the front end of the dust cover, and an LED light strip and an annular lampshade are further provided on the periphery of the dust cover. The LED light strip is electrically connected to the controller, and the LED light strip is provided in the annular lampshade.

[0020] The beneficial effects brought about by the technical solution provided by the embodiment of the present invention are: simple structure, easy to use, able to absorb dust generated by grinding, realize dust-free operation, and improve the working environment; able to realize switching between coarse grinding and fine grinding modes, easy to adjust according to actual construction needs, and effectively improve grinding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Schematic diagram of the overall structure of an embodiment of the present invention.

[0022] Figure 2 Schematic diagram of a grinding head according to an embodiment of the present invention.

[0023] Figure 3 for Figure 2 An enlarged schematic diagram of part A.

[0024] Figure 4 Schematic diagram of the adjustment mechanism according to an embodiment of the present invention.

[0025] Figure 5 Schematic diagram of an explosion of the transmission mechanism according to an embodiment of the present invention.

[0026] Figure 6 Schematic diagram of an adjustment unit according to an embodiment of the present invention.

[0027] Among them, the accompanying drawings are marked as follows: 1. operating handle; 1-1. driving motor; 2. grinding head; 2-1. dust cover; 2-11. dust exhaust port; 2-12. dust exhaust pipe; 2-13. hose; 2-2. transmission mechanism; 2-21. active plate; 2-22. connecting rod; 2-23. linkage plate; 2-24. long groove; 2-25. driving plate; 2-26. sliding rod; 2-3. grinding disc; 2-4. adjusting mechanism; 2-41. planetary gear set; 2-42. adjusting plate; 2-43. guide groove; 2-44. slider; 2-5. switching mechanism; 2-51. commutator; 2-52. shift fork; 2-53. nut; 2-54. adjusting bolt; 2-6. adjusting unit; 2-61. sprocket; 2-62. chain. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. Of course, the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0029] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, features defined as "first", "second" and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0031] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art can understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0032] Example 1

[0033] See also Figures 1 to 6 The present invention provides a handheld wall grinding device, comprising an operating handle 1, wherein the operating handle 1 is preferably a telescopic rod, a driving motor 1-1 and a grinding head 2, characterized in that the grinding head 2 comprises a dust cover 2-1, a transmission mechanism 2-2 is arranged in the dust cover 2-1, the input end of the transmission mechanism 2-2 is coaxially fixed with the output shaft of the driving motor 1-1, a grinding disc 2-3 is coaxially fixedly arranged at the output end of the transmission mechanism 2-2, a plurality of through holes are arranged in an array on the disc body of the grinding disc 2-3, and the through holes can effectively reduce the weight of the grinding disc 2-3, a side of the grinding disc 2-3 away from the transmission mechanism 2-2 is a sticky surface of Velcro, sandpaper is installed on the grinding disc 2-3, and an adjustment mechanism 2-4 for adjusting the position of the grinding disc 2-3 is arranged on the outer side of the transmission mechanism 2-2;

[0034] A dust outlet 2-11 is provided on one side of the dust cover 2-1, a dust outlet pipe 2-12 is provided on the dust outlet 2-11, one end of the dust outlet pipe 2-12 is connected to a hose 2-13, the hose 2-13 is connected to a dust collecting bag, a dust collector is provided at the bag opening of the dust collecting bag, and the dust generated by grinding is easily introduced into the dust collecting bag through the dust collector, thereby reducing the dust generated during the grinding process and effectively improving the working environment of the operator;

[0035] The grinding head 2 also includes a switching unit 2 - 5 disposed outside the dust cover 2 - 1 . The switching unit 2 - 5 is used to switch the grinding state of the grinding head 2 .

[0036] The transmission mechanism 2-2 includes an active plate 2-21 coaxially fixedly connected to the output shaft of the drive motor 1-1. Two connecting rods 2-22 are rotatably provided on the plate body of the active plate 2-21. One end of each connecting rod 2-22 is rotatably connected to the active plate 2-21, and the other end is rotatably provided with a linkage plate 2-23. The linkage plate 2-23 is in a "cross" shape, and the two opposite ends of the linkage plate 2-23 are rotatably connected to one of the connecting rods 2-22 respectively.

[0037] A long groove 2-24 is fixedly provided on the plate body of the linkage plate 2-23, a driving plate 2-25 is slidably provided in the long groove 2-24, two sliding rods 2-26 are fixedly provided on the plate body of the driving plate 2-25, and both sliding rods 2-26 slide in the long groove 2-24;

[0038] The grinding disc 2-3 is coaxially fixedly arranged on the side of the driving plate 2-25 away from the sliding rod 2-26 through the transmission shaft.

[0039] The connecting rod 2-22 can drive the linkage plate 2-23 to rotate. During the rotation of the linkage plate 2-23, the driving plate 2-25 is synchronously driven to rotate through the two sliding rods 2-26. Since the sliding rod 2-26 can slide in the long groove 2-24, when the axis of the driving plate 2-25 is parallel to the axis of the active plate 2-21, the active plate 2-21 can still drive the driving plate 2-25 to rotate.

[0040] The adjustment mechanism 2-4 includes a planetary gear set 2-41 arranged in the dust cover 2-1. The sun gear sleeve of the planetary gear set 2-41 is arranged on the outside of the output shaft of the drive motor 1-1 and is coaxial with the output shaft of the drive motor 1-1. The gear rack of the planetary gear set 2-41 is fixed to the dust cover 2-1. The adjustment plate 2-42 is fixed on the ring gear of the planetary gear set 2-41. The adjustment plate 2-42 is located below the drive plate 2-25.

[0041] The switching unit 2-5 can realize the switching of the device between two states, one of which is rough grinding. At this time, the grinding disc 2-3 rotates while revolving, effectively increasing the grinding area and grinding efficiency.

[0042] The other is fine grinding, where 2-3 grinding discs rotate on their own and do not revolve, effectively ensuring the fineness of the grinding.

[0043] A guide groove 2-43 is provided on the plate body of the adjustment plate 2-42, a slider 2-44 is slidably provided in the guide groove 2-43, a through hole is provided in the middle of the slider 2-44, and the through hole is rotatably connected to the transmission shaft;

[0044] It also includes an adjustment unit 2-6 arranged on the adjustment plate 2-42.

[0045] The switching unit 2-5 includes a commutator 2-51 slidably disposed on the output shaft of the drive motor 1-1. The commutator 2-51 is radially fixed to the output shaft of the drive motor 1-1 and slides axially. A plurality of driving teeth are arrayed on the lower surface of the commutator 2-51, and a plurality of driven teeth are arrayed on the upper surface of the sun gear.

[0046] A groove is set on the outer side of the commutator 2-51, and a shift fork 2-52 is set on one side of the commutator 2-51. The middle part of the shift fork 2-52 is rotatably connected to the drive motor 1-1. A semicircular shift rod is set at one end of the shift fork 2-52, and a ball is rotatably set at each end of the shift rod, and the ball rolls in the groove.

[0047] The end of the shift fork 2-52 away from the shift rod is rotatably provided with a nut 2-53, the internal thread of the nut 2-53 is connected to the adjusting bolt 2-54, the lower end of the adjusting bolt 2-54 is rotatably provided with an adapter, and the adapter is rotatably connected to the drive motor 1-1.

[0048] The position of the shift fork 2-52 is adjusted by rotating the adjusting bolt 2-54, and the commutator 2-51 is controlled by the shift fork 2-52 to achieve the engagement and separation of the driving teeth and the driven teeth. When the driving teeth and the driven teeth are engaged, the output shaft of the drive motor 1-1 and the planetary gear set 2-41 realize power transmission, and the adjusting plate 2-42 is driven to rotate by the planetary gear set 2-41. Since the sun gear of the planetary gear set 2-41 is active, the planet carrier is fixed, and the ring gear is passive, the planetary gear set 2-41 is a speed reduction transmission at this time, and the ring gear rotates in the opposite direction to the sun gear. The ring gear drives the adjusting plate 2-42 to rotate. At this time, the grinding disc 2-3 rotates while revolving, effectively increasing the grinding area and grinding efficiency, which is suitable for rough grinding of walls;

[0049] When the driving teeth and the driven teeth are separated, the output shaft of the driving motor 1-1 only drives the grinding disc 2-3 to rotate through the transmission mechanism 2-2. At this time, the grinding disc 2-3 only rotates on its own and does not revolve, which is suitable for fine grinding of the wall surface and effectively ensures the fineness of the grinding.

[0050] The adjustment unit 2-6 includes two sprockets 2-61 rotatably arranged on the plate body of the adjustment plate 2-42. The two sprockets 2-61 are connected by a chain 2-62. One link of the chain 2-62 is fixedly connected to the slider 2-44.

[0051] An adjusting knob is fixedly provided on each sprocket 2-61.

[0052] By turning the adjusting knob, the position of the slider 2-44 is adjusted, and then the position of the grinding disc 2-3 is adjusted. The position of the grinding disc 2-3 can be adjusted according to the grinding state. When rough grinding is performed, the diameter of the revolution of the grinding disc 2-3 can be adjusted.

[0053] An isolation brush is provided at the front end of the dust cover 2-1 along the circumference, and the isolation brush can clean the dust attached to the wall; an LED light strip and an annular lampshade are also provided on the periphery of the dust cover 2-1. The LED light strip is electrically connected to the controller, and the LED light strip is provided in the annular lampshade. When the external environment is dark, the LED light strip can be turned on to facilitate seeing the wall clearly and facilitate the operator's use.

[0054] When the present invention is used, the user adjusts the length of the operating handle 1 according to the height of the wall, and adjusts the state of the switching mechanism 2-5 according to the grinding requirements. The user holds the operating handle 1 with both hands, lifts the device, and places the grinding disc 2-3 against the wall to be grinded. The user turns on the switch of the driving motor 1-1, and the driving motor 1-1 drives the grinding disc 2-3 to rotate. The operator grinds the wall by moving the grinding head 2.

[0055] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A handheld wall grinding device, comprising an operating handle (1), a drive motor (1-1) and a grinding head (2), characterized in that: The grinding head (2) comprises a dust cover (2-1), a transmission mechanism (2-2) is arranged in the dust cover (2-1), an input end of the transmission mechanism (2-2) is coaxially fixed with an output shaft of the drive motor (1-1), a grinding disc (2-3) is coaxially fixedly arranged at the output end of the transmission mechanism (2-2), sandpaper is installed on the grinding disc (2-3), and an adjustment mechanism (2-4) for adjusting the position of the grinding disc (2-3) is arranged outside the transmission mechanism (2-2); A dust discharge port (2-11) is provided on one side of the dust cover (2-1), a dust discharge pipe (2-12) is provided on the dust discharge port (2-11), one end of the dust discharge pipe (2-12) is connected to a hose (2-13), and the hose (2-13) is connected to a dust collection bag; It also includes a switching unit (2-5) arranged outside the dust cover (2-1), and the switching unit (2-5) is used to switch the grinding state of the grinding head (2); The transmission mechanism (2-2) comprises an active plate (2-21) coaxially fixedly connected to the output shaft of the drive motor (1-1); two connecting rods (2-22) are rotatably provided on the plate body of the active plate (2-21); one end of each connecting rod (2-22) is rotatably connected to the active plate (2-21); and the other end is rotatably provided with a linkage plate (2-23); the linkage plate (2-23) is in a "cross" shape; and two opposite ends of the linkage plate (2-23) are respectively rotatably connected to one of the connecting rods (2-22); A long groove (2-24) is fixedly provided on the plate body of the linkage plate (2-23), a driving plate (2-25) is slidably provided in the long groove (2-24), two sliding rods (2-26) are fixedly provided on the plate body of the driving plate (2-25), and both of the sliding rods (2-26) slide in the long groove (2-24); A grinding disc (2-3) is coaxially fixedly arranged on a side of the driving plate (2-25) facing away from the sliding rod (2-26) via a transmission shaft; The adjustment mechanism (2-4) includes a planetary gear set (2-41) disposed in a dust cover (2-1), a sun gear of the planetary gear set (2-41) is sleeved on the outside of the output shaft of the drive motor (1-1) and is coaxial with the output shaft of the drive motor (1-1), a gear rack of the planetary gear set (2-41) is fixed to the dust cover (2-1), an adjustment plate (2-42) is fixed on the ring gear of the planetary gear set (2-41), and the adjustment plate (2-42) is located below the drive plate (2-25); A guide groove (2-43) is provided on the plate body of the adjustment plate (2-42), a slider (2-44) is slidably arranged in the guide groove (2-43), a through hole is provided in the middle of the slider (2-44), and the through hole is rotatably connected to the transmission shaft; Also included is an adjustment unit (2-6) arranged on the adjustment plate (2-42); The switching unit (2-5) comprises a commutator (2-51) slidably arranged on the output shaft of the drive motor (1-1), the commutator (2-51) and the output shaft of the drive motor (1-1) being radially fixed and axially sliding, a plurality of driving teeth being arranged in an array on the lower surface of the commutator (2-51), and a plurality of driven teeth being arranged in an array on the upper surface of the sun gear; A groove is provided on the outer side of the commutator (2-51), a shift fork (2-52) is provided on one side of the commutator (2-51), a middle portion of the shift fork (2-52) is rotatably connected to the drive motor (1-1), a semicircular shift rod is provided at one end of the shift fork (2-52), and a ball is rotatably provided at each end of the shift rod, and the ball rolls in the groove; A nut (2-53) is rotatably provided at one end of the shift fork (2-52) away from the shift rod, the internal thread of the nut (2-53) is connected to an adjusting bolt (2-54), and a transfer seat is rotatably provided at the lower end of the adjusting bolt (2-54), and the transfer seat is rotatably connected to the driving motor (1-1); The adjustment unit (2-6) comprises two sprockets (2-61) rotatably arranged on the plate body of the adjustment plate (2-42), the two sprockets (2-61) being connected via a chain (2-62), and one link of the chain (2-62) being fixedly connected to the slider (2-44); An adjusting knob is fixedly arranged on each of the sprockets (2-61).

2. The handheld wall grinding device according to claim 1, characterized in that: An isolation brush is provided at the front end of the dust cover (2-1) along the circumferential direction, and an LED light strip and an annular light cover are also provided on the periphery of the dust cover (2-1). The LED light strip is electrically connected to the controller, and the LED light strip is provided inside the annular light cover.

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