Telescopic positioning structure for hand-held sander

Abstract

This utility model relates to the field of grinding devices, and more particularly to a telescopic positioning structure for a handheld grinder, including a fixed plate; it also includes a first fixed sleeve and a grip sleeve. A motor is mounted on the upper end of the fixed plate, and the lower end of the motor's output shaft passes through the fixed plate and is fixedly connected to a grinding disc. A rotating frame is rotatably mounted on the upper end of the fixed plate, and the first fixed sleeve is mounted on the upper end of the rotating frame. A second fixed sleeve is hinged to the first fixed sleeve, and a second connecting hollow plate is fixedly connected inside the second fixed sleeve. The grip sleeve is fixedly connected to the outer wall of the second connecting hollow plate. This utility model, through a rotating latch design between the first and second fixed sleeves via a long rod at the rear end of the device, effectively reduces the problem of portability caused by the device being too long and inconvenient to fold. The overall length of the device is adjusted by a friction-fixed sliding method, which improves the adaptability of the grinder to different heights during operation, thereby improving the comfort of using the device.

Description

Technical Field

[0001] This utility model belongs to the field of polishing devices, specifically relating to the telescopic positioning structure of a handheld polisher. Background Technology

[0002] A handheld grinder is a tool that uses an electrically driven, high-speed rotating grinding head to process the surface of a workpiece. Operators can hold the device and move it flexibly to perform grinding operations on workpieces of different positions and shapes.

[0003] Existing handheld grinders have some problems in use. The long handle at the rear cannot usually be folded, and its excessive length makes it very inconvenient to carry and store. In addition, the length of traditional grinders is fixed, making it difficult to adjust to different work heights. This not only affects the comfort of use but also reduces work efficiency. Furthermore, during the folding and storage process, the connecting cable is easily subjected to external forces such as squeezing and pulling, which can lead to wear, leakage, or even power outages.

[0004] Therefore, existing grinding machines have problems such as inconvenient storage and length adjustment, and the connection wires are prone to wear and leakage during use. Utility Model Content

[0005] To overcome the problems of inconvenient storage and length adjustment, as well as easy wear and leakage of connecting wires in existing grinders, a telescopic positioning structure for handheld grinders is proposed.

[0006] The technical solution of this utility model is as follows: a telescopic positioning structure for a handheld grinder, including a fixed plate; it also includes a first fixed sleeve and a grip sleeve. A motor is provided at the upper end of the fixed plate, and the lower end of the motor's output shaft passes through the fixed plate and is fixedly connected to a grinding disc. A rotating frame is rotatably provided at the upper end of the fixed plate, and the first fixed sleeve is provided at the upper end of the rotating frame. A second fixed sleeve is hinged to the first fixed sleeve. A second connecting hollow plate is fixedly connected inside the second fixed sleeve. The grip sleeve is fixedly connected to the outer wall of the second connecting hollow plate. An extension rod is slidably provided on the inner wall of the second connecting hollow plate. An adjustment component for slidingly fixing the extension rod is provided on the grip sleeve. The adjustment component includes a sliding plate and a rubber friction plate. A groove is opened on the outer wall of the integral structure formed by the grip sleeve and the second connecting hollow plate. A limit box is fixedly connected at the groove position on the grip sleeve. A sliding plate is slidably provided inside the limit box. A rubber friction plate is fixedly connected to the lower end of the sliding plate. The lower end of the rubber friction plate and the outer wall of the extension rod are in contact with each other.

[0007] Preferably, gears are rotatably provided on the inner walls of the left and right ends of the limiting box, and first limiting grooves are provided on the inner walls of the left and right ends of the limiting box. The left and right ends of the sliding plate are distributed and limited to slide within the two first limiting grooves. The upper end of the sliding plate is provided with a toothed surface, and the toothed surface and the outer wall of the gear mesh with each other.

[0008] Preferably, the upper end of the gear is fixed with a rotating surface, and the upper and lower ends of the rotating surface are provided with third through holes. The upper end of the limiting box is provided with a placement groove, and the lower end of the inner wall of the limiting box located in the placement groove is provided with a threaded groove. The diameter of the threaded groove and the groove of the third through hole are the same.

[0009] Preferably, the upper end of the fixed disk is fixedly connected to two connecting plates, the rotating frame is rotatably mounted on the two connecting plates, the upper end of the fixed disk-motor is fixedly connected to a connecting sleeve, the inner wall of the connecting sleeve is fixedly connected to a first connecting hollow rod, and the outer wall of the first connecting hollow rod and the inner wall of the first fixed sleeve are fixedly connected to each other.

[0010] Preferably, the outer wall of the first fixing sleeve is fixed with two first fixing pieces, and the upper and lower ends of the two first fixing pieces are connected through a first through hole. The outer wall of the second fixing sleeve is fixed with two second fixing pieces, and the inner wall of the two second fixing pieces is fixed with an insert plate, and the upper and lower ends of the insert plate are connected through a second through hole.

[0011] Preferably, the lengths of the upper and lower ends of the insert plate are the same as the lengths of the two first fixing pieces at their closest points, and the diameters of the second and first through holes are the same.

[0012] Preferably, an extension rod is slidably disposed inside the second connecting hollow plate, and a pad is fixedly connected to the other end of the extension rod.

[0013] Preferably, a connecting wire is fixed to the upper end of the motor, and a first groove is opened on the outer wall of the first connecting hollow rod. After passing through the first connecting hollow rod and the first groove, the connecting wire fits against the outer wall of the second connecting hollow plate and is then connected to the grip sleeve. The grip sleeve is provided with a wire interface, and the wire interface and the connecting wire are electrically connected to each other.

[0014] The beneficial effects of this utility model are as follows: By using the rotating buckle design between the first and second fixed sleeves through the long rod at the rear end of the device, the problem of storage and portability caused by the device being too long and inconvenient to fold can be effectively reduced. The overall length of the device can be adjusted by using a friction fixing method during sliding, which can improve the adaptability of the grinder to different heights during operation, thereby improving the comfort of using the device. Attached Figure Description

[0015] Figure 1 The diagram shown is a three-dimensional structural schematic of this utility model;

[0016] Figure 2The diagram shown is a cross-sectional perspective view of the present invention.

[0017] Figure 3 The diagram shown is a three-dimensional structural schematic of the first fixing sleeve of this utility model;

[0018] Figure 4 The diagram shown is a three-dimensional structural schematic of the first and second fixing sleeves of this utility model.

[0019] Figure 5 The diagram shown is a three-dimensional structural schematic of the sliding adjustment component of this utility model.

[0020] The markings in the attached diagram are as follows: 1. Fixed plate; 101. Connecting plate; 102. Rotating frame; 103. Connecting sleeve; 2. Motor; 201. Connecting wire; 3. Grinding disc; 4. First connecting hollow rod; 401. First groove; 5. First fixing sleeve; 501. Second fixing sleeve; 502. First fixing piece; 503. First through hole; 504. Second fixing piece; 505. Insert plate; 506. Second through hole; 6. Second connecting hollow plate; 7. Grip sleeve; 701. Limiting box; 702. Wire interface; 703. First limiting groove; 704. Sliding plate; 705. Rubber friction plate; 706. Tooth surface; 707. Gear; 708. Rotating surface; 709. Placement groove; 710. Third through hole; 711. Threaded groove; 8. Extension rod; 801. Pad. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Please see Figures 1-5This utility model provides an embodiment of a telescopic positioning structure for a handheld grinder, including a fixed plate 1; it also includes a first fixed sleeve 5 and a grip sleeve 7. A motor 2 is provided at the upper end of the fixed plate 1, and the lower end of the output shaft of the motor 2 passes through the fixed plate 1 and is fixedly connected to a grinding disc 3. A rotating frame 102 is rotatably provided at the upper end of the fixed plate 1, and the first fixed sleeve 5 is provided at the upper end of the rotating frame 102. A second fixed sleeve 501 is hinged to the first fixed sleeve 5. A second connecting hollow plate 6 is fixedly connected inside the second fixed sleeve 501. The grip sleeve 7 is fixedly connected to the outer wall of the second connecting hollow plate 6. An extension rod 8 is slidably provided on the inner wall of the second connecting hollow plate 6. An adjustment component for sliding and fixing the extension rod 8 is provided on the grip sleeve 7. The adjustment component includes a sliding plate 704 and a rubber... The outer wall of the integral structure formed by the rubber friction plate 705, the grip sleeve 7, and the second connecting hollow plate 6 has a groove. A limit box 701 is fixedly connected to the groove on the grip sleeve 7. A sliding plate 704 is slidably arranged inside the limit box 701. The lower end of the sliding plate 704 is fixedly connected to the rubber friction plate 705. The lower end of the rubber friction plate 705 and the outer wall of the extension rod 8 are in contact with each other. The long rod at the rear end of the device can effectively reduce the problem of storage and portability caused by the device being too long and inconvenient to fold when stored by the rotation buckle design between the first fixing sleeve 5 and the second fixing sleeve 501. The overall length of the device can be adjusted by using the friction fixing method when sliding, which can improve the adaptability of the grinder to different heights when working, thereby improving the comfort of using the device.

[0023] Please see Figures 1-4In this embodiment, two connecting plates 101 are fixedly connected to the upper end of the fixed disk 1. The rotating frame 102 is rotatably mounted on the two connecting plates 101. A connecting sleeve 103 is fixedly connected to the upper end of the fixed disk 1-motor 2. A first connecting hollow rod 4 is fixedly connected to the inner wall of the connecting sleeve 103. The outer wall of the first connecting hollow rod 4 and the inner wall of the first fixed sleeve 5 are fixedly connected to each other. Two first fixing pieces 502 are fixedly connected to the outer wall of the first fixed sleeve 5. A first through hole 503 is opened through the upper and lower ends of the two first fixing pieces 502. Two second fixing pieces 504 are fixedly connected to the outer wall of the second fixed sleeve 501. An insert plate 505 is fixedly connected to the inner wall of the two second fixing pieces 504. A second through hole 506 is opened through the upper and lower ends of the insert plate 505. The length of the upper and lower ends of the insert plate 505 is the same as the length of the two first fixing pieces 502 that are close to each other. The second through hole 506 and the first through hole 503 are connected to each other. With the same hole size, when the upper surfaces of the first fixing sleeve 5 and the second fixing sleeve 501 are in a fitted state, the rotation angle of the first fixing sleeve 5 and the second fixing sleeve 501 is fixed by passing the bolt through the first through hole 503 and the second through hole 506 and then using a nut. An extension rod 8 is slidably arranged inside the second connecting hollow plate 6. A pad 801 is fixedly connected to the other end of the extension rod 8. A connecting wire 201 is fixedly connected to the upper end of the motor 2. A first groove 401 is opened on the outer wall of the first connecting hollow rod 4. The connecting wire 201 passes through the first connecting hollow rod 4 and the first groove 401 and then fits against the outer wall of the second connecting hollow plate 6 and is then connected to the grip sleeve 7. A wire interface 702 is provided on the grip sleeve 7. The wire interface 702 and the connecting wire 201 are electrically connected to each other, providing an effective placement space for the connecting wire 201 and preventing wear, leakage and power failure of the connecting wire 201 when folded.

[0024] Please see Figures 4-5In this embodiment, gears 707 are rotatably mounted on the inner walls of the left and right ends of the limiting box 701. First limiting grooves 703 are formed on the inner walls of the left and right ends of the limiting box 701. The left and right ends of the sliding plate 704 are slidably positioned within the two first limiting grooves 703. A toothed surface 706 is formed on the upper end of the sliding plate 704, meshing with the outer wall of the gear 707. A rotating surface 708 is fixedly connected to the upper end of the gear 707. Third through holes 710 are formed at the upper and lower ends of the rotating surface 708. A placement groove 709 is formed on the upper end of the limiting box 701. The limiting box 701 is positioned on the placement groove 709. A threaded groove 711 is provided at the lower end of the inner wall of the groove 709. The diameter of the groove 711 and the groove of the third through hole 710 are the same. When the extension rod 8 is inserted into the inner wall of the second connecting hollow plate 6, the gear 707 is rotated by pressing down on the rotating surface 708, which drives the sliding plate 704 to move. This causes the lower end of the rubber friction plate 705 to rub against and fix the outer wall of the extension rod 8, thereby fixing the extension rod 8 in the inner wall of the second connecting hollow plate 6. Then, the rotation angle of the rotating surface 708 is fixed by threading the bolt through the third through hole 710 and then threading it into the threaded groove 711.

[0025] Before use, the extension rod 8 is slid into the lower end of the second connecting hollow plate 6, so that the inner wall of the second connecting hollow plate 6 and the outer wall of the extension rod 8 are in contact with each other. Then, the second fixing sleeve 501 is flipped towards the first fixing sleeve 5, so that the original upper surfaces of the second fixing sleeve 501 and the first fixing sleeve 5 are in contact with each other. Next, the first fixing sleeve 5 and the second fixing sleeve 501 are vertically connected and fixed by passing the bolt through the first through hole 503 and the second through hole 506. Then, the length of the device rod is adjusted by sliding the extension rod 8. After adjustment, the outer wall of the gear 707 and the tooth surface 706 on the sliding plate 704 mesh with each other. Pressing the rotating surface 708 causes the sliding plate 704 to slide under the limit of the first limiting groove 703, thereby causing the rubber friction plate 705 to rub and fix the outer wall of the extension rod 8. Then, by passing the bolt through the limiting box 701 and threading it onto the threaded groove 711, the extension rod 8 on the second connecting hollow plate 6 is fixed. Then, it is connected through the wire and the wire interface 702 to carry out subsequent grinding work. By setting a foldable storage method, the length of the device when stored is greatly reduced. By pressing and sliding to adjust the length of the device, the worker can easily adjust the overall length of the grinding device, improving the overall practicality of the grinding device and its adaptability to various application scenarios.

Claims

1. A telescopic positioning structure for a handheld grinder, comprising a fixed disc (1); characterized in that: It also includes a first fixed sleeve (5) and a grip sleeve (7). A motor (2) is provided at the upper end of the fixed plate (1). The lower end of the output shaft of the motor (2) passes through the fixed plate (1) and is fixedly connected to a grinding disc (3). A rotating frame (102) is rotatably provided at the upper end of the fixed plate (1). A first fixed sleeve (5) is provided at the upper end of the rotating frame (102). A second fixed sleeve (501) is hinged to the first fixed sleeve (5). A second connecting hollow plate (6) is fixedly connected inside the second fixed sleeve (501). A grip sleeve (7) is fixedly connected to the outer wall of the second connecting hollow plate (6). The inner wall of the second connecting hollow plate (6) slides. An extension rod (8) is provided, and an adjustment component for sliding and fixing the extension rod (8) is provided on the grip sleeve (7). The adjustment component includes a sliding plate (704) and a rubber friction plate (705). A groove is provided on the outer wall of the integral structure formed by the grip sleeve (7) and the second connecting hollow plate (6). A limit box (701) is fixedly connected to the groove on the grip sleeve (7). The sliding plate (704) is slidably arranged in the limit box (701). The lower end of the sliding plate (704) is fixedly connected to the rubber friction plate (705). The lower end of the rubber friction plate (705) and the outer wall of the extension rod (8) are in contact with each other.

2. The telescopic positioning structure of the handheld grinder according to claim 1, characterized in that: Gears (707) are rotatably provided on the inner walls of the left and right ends of the limiting box (701). First limiting grooves (703) are provided on the inner walls of the left and right ends of the limiting box (701). The left and right ends of the sliding plate (704) are distributed and limited to slide in the two first limiting grooves (703). The upper end of the sliding plate (704) is provided with a toothed surface (706). The toothed surface (706) and the outer wall of the gear (707) mesh with each other.

3. The telescopic positioning structure of the handheld grinder according to claim 2, characterized in that: The upper end of the gear (707) is fixed with a rotating surface (708). The upper and lower ends of the rotating surface (708) are provided with a third through hole (710). The upper end of the limiting box (701) is provided with a placement groove (709). The lower end of the inner wall of the limiting box (701) in the placement groove (709) is provided with a threaded groove (711). The diameter of the groove opening of the threaded groove (711) and the third through hole (710) is the same.

4. The telescopic positioning structure of the handheld grinder according to claim 1, characterized in that: Two connecting plates (101) are fixedly connected to the upper end of the fixed disk (1). The rotating frame (102) is rotatably set on the two connecting plates (101). A connecting sleeve (103) is fixedly connected to the upper end of the fixed disk (1)-motor (2). A first connecting hollow rod (4) is fixedly connected to the inner wall of the connecting sleeve (103). The outer wall of the first connecting hollow rod (4) and the inner wall of the first fixed sleeve (5) are fixedly connected to each other.

5. The telescopic positioning structure of the handheld grinder according to claim 1, characterized in that: Two first fixing pieces (502) are fixed to the outer wall of the first fixing sleeve (5). The upper and lower ends of the two first fixing pieces (502) are connected to a first through hole (503). Two second fixing pieces (504) are fixed to the outer wall of the second fixing sleeve (501). An insert plate (505) is fixed to the inner wall of the two second fixing pieces (504). The upper and lower ends of the insert plate (505) are connected to a second through hole (506).

6. The telescopic positioning structure of the handheld grinder according to claim 5, characterized in that: The lengths of the upper and lower ends of the insert plate (505) are the same as the lengths of the two first fixing pieces (502) at their closest ends, and the diameters of the second through hole (506) and the first through hole (503) are the same.

7. The telescopic positioning structure of the handheld grinder according to claim 1, characterized in that: An extension rod (8) is slidably provided inside the second connecting hollow plate (6), and a pad (801) is fixedly connected to the other end of the extension rod (8).

8. The telescopic positioning structure of the handheld grinder according to claim 1, characterized in that: A connecting wire (201) is fixed to the upper end of the motor (2). A first groove (401) is opened on the outer wall of the first connecting hollow rod (4). The connecting wire (201) passes through the first connecting hollow rod (4) and the first groove (401) and then attaches to the outer wall of the second connecting hollow plate (6) and is connected to the grip sleeve (7). A wire interface (702) is provided on the grip sleeve (7). The wire interface (702) and the connecting wire (201) are electrically connected to each other.

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