Small handheld grinding machine with guiding function

Abstract

The utility model relates to the technical field of handheld polishers, in particular to a small handheld polisher with a guiding function, which comprises a polishing head and a positioning and guiding mechanism, the polishing head is mounted on a polisher body, and the positioning and guiding mechanism is arranged on the outer side of the polishing head. The positioning guide mechanism comprises a clamping ring, the clamping ring is fixedly arranged at the position, close to the upper end, of the grinding machine body, a sliding groove of a T-shaped structure is formed in the clamping ring, a semicircular sliding plate matched with the sliding groove is arranged in the annular groove, the sliding plate is slidably connected with the clamping ring, and two symmetrical supporting plates are arranged on the upper side of the sliding plate and symmetrically located on the outer side of the grinding head. And two groups of limiting assemblies are arranged on each group of supporting plates close to the upper end. The polishing depth of the polishing head can be limited through the arranged positioning guide mechanism, the polishing head is guided to accurately move along the edge of a workpiece, the polishing efficiency is improved, and the operation difficulty and the labor intensity are reduced.

Description

Technical Field

[0001] This utility model relates to the field of handheld polishing machine technology, and more specifically, to a small handheld polishing machine with a guiding function. Background Technology

[0002] Handheld grinders are efficient and portable grinding tools primarily used for grinding, polishing, and deburring the surfaces of various materials. They utilize an internal motor to drive the grinding head (such as a grinding wheel or disc) to rotate or vibrate at high speed. The friction between the abrasive particles and the workpiece surface removes surface contaminants, smooths uneven surfaces, and polishes them to a smooth finish. Handheld grinders can complete grinding tasks quickly and accurately, improving processing efficiency and surface quality. Furthermore, their portability allows for on-site grinding, reducing the hassle of transporting workpieces. Handheld grinders are powerful, easy-to-operate, and widely applicable grinding tools, playing a vital role in modern industrial production and home renovation.

[0003] Existing handheld grinders typically require operators to manually control the grinding depth and direction based on experience. This not only demands a high level of skill from the operator but also easily leads to fatigue during prolonged use, affecting grinding quality and efficiency. Especially when dealing with workpiece edges, maintaining a uniform grinding depth and smooth transition is difficult, easily resulting in over-grinding or under-grinding. Therefore, there is an urgent need for a small handheld grinder with a guiding function to solve these problems. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides a small handheld grinder with a guiding function, which solves the problems mentioned in the background art. This invention can limit the grinding depth of the grinding head and guide the grinding head to move precisely along the edge of the workpiece, thereby improving grinding efficiency and reducing the difficulty of operation and labor intensity.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A small handheld grinder with a guiding function includes a grinding head and a positioning and guiding mechanism. The grinding head is mounted on the body of the grinder, and the positioning and guiding mechanism is provided on the outer side of the grinding head.

[0007] The positioning and guiding mechanism includes a limiting component, a support plate, a retaining ring, an annular groove, and a sliding plate. The retaining ring is fixed to the upper part of the grinding machine body. A T-shaped sliding groove is opened inside the retaining ring. A semi-circular sliding plate that matches the groove is provided inside the groove, and the sliding plate is slidably connected to the retaining ring. Two sets of symmetrical support plates are provided on the upper side of the sliding plate, and the two sets of support plates are symmetrically located outside the grinding head. Two sets of limiting components are provided near the upper part of each set of support plates. One set of limiting components is fixedly connected to the support plate, and the other set of limiting components is adjustablely connected to the support plate. The limiting components are perpendicular to the axis of the grinding head.

[0008] Furthermore, the limiting component includes a sleeve, an external thread, a positioning nut, an adjusting groove, a stop block, a connecting rod, and a return spring. One end of the connecting rod is connected to the support plate, and the other end is fitted with a sleeve. A return spring is provided inside the sleeve. Two sets of adjusting grooves are symmetrically opened on the annular surface of the sleeve. Two sets of stop blocks are symmetrically fixed on the outer end of the connecting rod. The stop blocks are inserted into the adjusting grooves and slidably connected thereto. An external thread is engraved on the annular surface of the sleeve, and a positioning nut is threadedly connected to the annular surface of the sleeve.

[0009] Furthermore, a sliding groove is provided near the upper end of the support plate, and an adjusting bolt is inserted inside the sliding groove. The inner end of the adjusting bolt is inserted into the connecting rod on the adjustable limiting component and screwed thereon.

[0010] Furthermore, the outer end of the sleeve is fitted with rotatable balls.

[0011] Furthermore, the right side of the grinding head is provided with an arc-shaped protective cover, and the protective cover is fixedly connected to two sets of support plates.

[0012] Furthermore, two sets of plug-in seats are symmetrically fixed on the surface of the sliding plate, and the plug-in seats have plug-in slots inside. A T-shaped plug-in plate is fixed at the bottom of the support plate, and the plug-in plate is inserted into the plug-in slot and detachably connected to the plug-in seat.

[0013] Furthermore, a screw hole is provided in the middle of the slide plate, and a locking bolt is installed inside the screw hole. The inner end of the locking bolt penetrates the slide plate and extends into the annular groove.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. This utility model can limit the grinding depth of the grinding head through the positioning and guiding mechanism, and guide the grinding head to move precisely along the edge of the workpiece, reducing the difficulty of operation and labor intensity, and improving the grinding quality and efficiency. In particular, when dealing with the edge of the workpiece, it can maintain a uniform grinding depth and a smooth transition.

[0016] 2. This utility model can limit and support the grinding head by setting a limiting component, thereby restricting the movement range of the grinding head and thus limiting and adjusting the grinding depth of the grinding head.

[0017] 3. In this utility model, a sliding groove is provided near the upper end of the support plate. An adjusting bolt is inserted into the sliding groove, and the inner end of the adjusting bolt is inserted into the connecting rod on the adjustable limiting component and screwed thereon. This design enables the adjustment of the position of the limiting component, thereby allowing the adjustment of the distance between the two sets of limiting components. This facilitates the grinding of the edges of workpieces of different thicknesses and improves the applicability.

[0018] 4. In this utility model, the outer end of the sleeve is fitted with rotatable balls. The design of the balls can significantly reduce the frictional resistance between the sleeve and the workpiece contact surface, improve the smoothness of the grinding head moving along the workpiece surface, and at the same time prevent wear on the workpiece surface.

[0019] 5. In this utility model, the right side cover of the grinding head is equipped with an arc-shaped protective cover, which is fixedly connected to two sets of support plates. During the grinding process, the fragments, dust, and sparks generated by the high-speed rotation of the grinding head may cause injury to the operator. The arc-shaped protective cover can effectively block these flying objects and protect the operator's eyes, face, and other parts of the body from injury.

[0020] 6. In this utility model, two sets of plug-in seats are symmetrically fixed on the sliding plate ring surface. Each plug-in seat has a plug-in groove inside. A T-shaped plug-in plate is fixed to the bottom of the support plate. The plug-in plate is inserted into the plug-in groove and detachably connected to the plug-in seat. The design of the plug-in plate and plug-in seat enables a detachable connection between the limiting component and the grinding machine body, facilitating quick installation and disassembly and improving operational convenience.

[0021] 7. In this utility model, a screw hole is provided in the middle of the slide plate, and a locking bolt is installed inside the screw hole. The inner end of the locking bolt penetrates the slide plate and extends into the annular groove. The locking bolt, in conjunction with the screw hole, can lock the slide plate, making it easy to fix the slide plate in the current position and ensuring the stability of the slide plate on the retaining ring. Attached Figure Description

[0022] Fig. 1 This is a schematic diagram of the overall structure of this utility model.

[0023] Fig. 2 This is a partial structural schematic diagram of the present invention.

[0024] Fig. 3 This is a partial disassembly diagram of the present invention.

[0025] Fig. 4 This is a schematic diagram of the limiting component and the support plate in this utility model.

[0026] Fig. 5 This is a schematic diagram of the limiting component in this utility model.

[0027] Fig. 6 This is a cross-sectional view of the limiting component in this utility model.

[0028] In the diagram: 1. Grinding head; 2. Positioning guide mechanism; 21. Protective cover; 22. Limiting component; 221. Ball bearing; 222. Sleeve; 223. External thread; 224. Positioning nut; 225. Adjusting groove; 226. Stop block; 227. Connecting rod; 228. Return spring; 23. Support plate; 231. Slide groove; 232. Adjusting bolt; 24. Snap ring; 25. Plug plate; 26. Ring groove; 27. Plug seat; 28. Plug groove; 29. ​​Screw hole; 210. Locking bolt; 211. Slide plate; 3. Grinding machine body. Detailed Implementation

[0029] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0030] Example:

[0031] like Figs. 1 to 6 As shown, a small handheld grinder with a guiding function includes a grinding head 1 and a positioning and guiding mechanism 2. The grinding head 1 is mounted on the body 3 of the grinder and is responsible for performing the grinding operation. The positioning and guiding mechanism 2 is provided on the outside of the grinding head 1 to guide and control the movement direction and grinding depth of the grinding head 1.

[0032] The positioning and guiding mechanism 2 includes a limiting component 22, a support plate 23, a retaining ring 24, an annular groove 26, and a sliding plate 211. The retaining ring 24 is fixed to the upper part of the grinding machine body 3. A T-shaped sliding groove 231 is formed inside the retaining ring 24. A semi-circular sliding plate 211 is provided inside the annular groove 26 to match it, and the sliding plate 211 is slidably connected to the retaining ring 24. Two sets of symmetrical support plates 23 are provided on the upper side of the sliding plate 211, and the two sets of support plates 23 are symmetrically located on the outside of the grinding head 1. Each set of support plates 23 has two... A set of limiting components 22 is included to limit and adjust the grinding depth of the grinding head 1. One set of limiting components 22 is fixedly connected to the support plate 23, while the other set is adjustablely connected to the support plate 23. The limiting components 22 are perpendicular to the axis of the grinding head 1. This design solves the problem that existing handheld grinders typically require operators to manually control the grinding depth and direction of movement based on experience. This not only demands high technical skills from the operator but also easily leads to fatigue during prolonged operation, affecting grinding quality and efficiency. Especially when dealing with workpiece edges, it is difficult to maintain a uniform grinding depth and smooth transition, easily resulting in over-grinding or under-grinding.

[0033] In this embodiment, the limiting component 22 includes a sleeve 222, an external thread 223, a positioning nut 224, an adjusting groove 225, a stop block 226, a connecting rod 227, and a return spring 228. One end of the connecting rod 227 is connected to the support plate 23, and the other end is fitted with the sleeve 222. The sleeve 222 contains a return spring 228. Two sets of adjusting grooves 225 are symmetrically opened on the annular surface of the sleeve 222. Two sets of stop blocks 226 are symmetrically fixed on the outer end of the connecting rod 227. The stop blocks 226 are engaged in the adjusting grooves 225 and slidably connected thereto. The sleeve 222 has an external thread 223 engraved on its annular surface, and the positioning nut 224 is threadedly connected to the annular surface of the sleeve 222. The limiting component 22 can limit and support the grinding head 1, restricting the movement range of the grinding head 1, thereby limiting and adjusting the grinding depth of the grinding head 1.

[0034] In this embodiment, a groove 231 is provided on the support plate 23 near its upper end. An adjusting bolt 232 is inserted into the groove 231. The inner end of the adjusting bolt 232 is inserted into the connecting rod 227 on the adjustable limiting component 22 and screwed thereon. This design enables the position adjustment of the limiting component 22, thereby allowing the spacing between the two sets of limiting components 22 to be adjusted. This facilitates the grinding of the edges of workpieces of different thicknesses and improves the applicability.

[0035] In this embodiment, a rotatable ball bearing 221 is embedded at the outer end of the sleeve 222. The design of the ball bearing 221 can significantly reduce the frictional resistance between the sleeve 222 and the workpiece contact surface, improve the smoothness of the movement of the grinding head 1 along the workpiece surface, and at the same time prevent wear on the workpiece surface.

[0036] In this embodiment, the right side of the grinding head 1 is covered with an arc-shaped protective cover 21, and the protective cover 21 is fixedly connected to two sets of support plates 23. During the grinding process, the fragments, dust and sparks generated by the high-speed rotation of the grinding head 1 may cause injury to the operator. The arc-shaped protective cover 21 can effectively block these flying objects and protect the operator's eyes, face and other parts of the body from injury.

[0037] In this embodiment, two sets of insertion seats 27 are symmetrically fixed on the annular surface of the slide plate 211. Insertion slots 28 are formed inside the insertion seats 27. A T-shaped insertion plate 25 is fixed to the bottom of the support plate 23. The insertion plate 25 is inserted into the insertion slot 28 and detachably connected to the insertion seat 27. The design of the insertion plate 25 and the insertion seats 27 enables a detachable connection between the limiting component 22 and the grinding machine body 3, facilitating quick installation and disassembly and improving operational convenience.

[0038] In this embodiment, a screw hole 29 is provided in the middle of the slide plate 211, and a locking bolt 210 is installed inside the screw hole 29. The inner end of the locking bolt 210 penetrates the slide plate 211 and extends into the annular groove 26. The locking bolt 210 and the screw hole 29 can lock the slide plate 211, making it easy to fix the slide plate 211 in the current position and ensuring the stability of the slide plate 211 on the retaining ring 24.

[0039] The working principle of this small handheld grinder with guidance function:

[0040] In actual use, first insert the plug plate 25 into the plug socket 27 to ensure a stable connection between the limiting component 22 and the grinding machine body 3, thus installing the limiting component 22. Then, rotate the slide plate 211 to adjust the position of the limiting component 22, and rotate the locking bolt 210 to lock the position of the slide plate 211 on the retaining ring 24, ensuring that the slide plate 211 will not slide. Then, adjust the position of the limiting component 22. According to the thickness of the workpiece edge, adjust the distance between the two sets of limiting components 22 by rotating the positioning nut 224 and the adjusting bolt 232. It should be noted that the contact plane formed by the outermost edge of the ball bearing 221 at the end of the limiting component 22 is designed to slightly protrude from the grinding working surface of the grinding head 1. When the operator holds the grinding machine and makes the ball bearing 221 contact and adhere to the workpiece surface, the grinding head 1 has not yet contacted the workpiece. At this time, the operator can stably guide the entire equipment to move along the edge of the workpiece by using the ball bearing 221 as a sliding fulcrum. When grinding is required, the operator only needs to apply slight force radially towards the grinding head (i.e., towards the workpiece) to push the entire grinding machine body 3. At this time, inside the limiting component 22, the sleeve 222 is compressed, and the return spring 228 inside is compressed, allowing the connecting rod 227 to slide inward relative to the sleeve 222 (i.e., towards the grinding machine body 3). This sliding process allows the grinding machine body 3, along with the grinding head 1, to feed towards the workpiece until the grinding head 1 contacts the workpiece surface and reaches the predetermined grinding depth. Then, the limiting component 22 is adjusted according to the required grinding depth by rotating the adjusting positioning nut 224 on the sleeve 222. At this time, the distance from the stop block 226 to the positioning nut 224 is the distance that the connecting rod 227 can move, which is the distance that the grinding head 1 can move, i.e., the grinding depth. Therefore, by rotating the positioning nut 224 to preset the stop position of the stop block 226, the maximum movable stroke of the connecting rod 227 (along with the grinding machine body 3 and the grinding head 1 fixed thereto) is determined. When the ball bearing 221 contacts the workpiece, force continues to be applied, and the grinding head 1 feeds towards the workpiece until the stop block 226 on the connecting rod 227 abuts against the positioning nut 224 and can no longer move. At this point, the grinding depth has just reached the preset value. Then, the grinding machine is started, and the grinding head 1 is aligned with the edge of the workpiece to begin the grinding operation. During this process, the ball bearing 221 on the sleeve 222 assembly abuts against the workpiece surface, reducing the contact friction.

[0041] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. For those skilled in the art, other variations or modifications can be made based on the above description. It is impossible to exhaustively list all the implementation methods here. Any obvious variations or modifications derived from the technical solutions of this utility model are still within the protection scope of this utility model.

Claims

1. A small handheld sander with guiding function, comprising a sander head (1) and a positioning and guiding mechanism (2), characterized in that: The polishing head (1) is installed on the polishing machine body (3), and the outer side of the polishing head (1) is provided with a positioning guide mechanism (2); The positioning guide mechanism (2) comprises a limiting component (22), a supporting plate (23), a clamping ring (24), a ring groove (26) and a sliding plate (211), the clamping ring (24) is fixedly arranged on the polishing machine body (3) near the upper end, a T-shaped sliding groove (231) is formed in the clamping ring (24), the ring groove (26) is internally provided with a semicircular sliding plate (211) matched therewith, and the sliding plate (211) is in sliding connection with the clamping ring (24), the upper side of the sliding plate (211) is provided with two groups of symmetrical supporting plates (23), and the two groups of supporting plates (23) are symmetrically located on the outer side of the polishing head (1), two groups of limiting components (22) are arranged on each group of supporting plates (23) near the upper end, one group of limiting components (22) is fixedly connected with the supporting plate (23), the other group of limiting components (22) is adjustably connected with the supporting plate (23), and the limiting component (22) is perpendicular to the axis of the polishing head (1).

2. The small-sized hand-held sander with a guide function according to claim 1, characterized in that: The limiting component (22) comprises a sleeve (222), an external thread (223), a positioning nut (224), an adjusting groove (225), a stop block (226), a connecting rod (227) and a return spring (228), one end of the connecting rod (227) is connected with the supporting plate (23), the other end of the connecting rod (227) is sleeved with the sleeve (222), the sleeve (222) is internally provided with the return spring (228), two groups of adjusting grooves (225) are symmetrically formed on the ring surface of the sleeve (222), two groups of stop blocks (226) are symmetrically fixedly arranged on the outer end of the connecting rod (227), the stop blocks (226) are clamped into the adjusting grooves (225) and are in sliding connection with the adjusting grooves (225), the external thread (223) is engraved on the ring surface of the sleeve (222), and the positioning nut (224) is threadedly connected with the ring surface of the sleeve (222).

3. The small-sized hand-held sander with a guide function according to claim 2, characterized in that: A sliding groove (231) is formed on the supporting plate (23) near the upper end, an adjusting bolt (232) is inserted into the sliding groove (231), and the inner end of the adjusting bolt (232) is inserted into the connecting rod (227) of the adjustable limiting component (22) and is screwed with the connecting rod (227).

4. The small-sized hand-held sander with a guide function according to claim 2, characterized in that: A rotatable ball (221) is embedded on the outer end of the sleeve (222).

5. The small-sized hand-held sander with a guide function according to claim 1, characterized in that: An arc-shaped protective cover (21) is arranged on the right side of the polishing head (1), and the protective cover (21) is fixedly connected with the two groups of supporting plates (23).

6. The small-sized hand-held sander with a guide function according to claim 1, characterized in that: Two groups of plug-in seats (27) are symmetrically fixedly arranged on the ring surface of the sliding plate (211), a plug-in groove (28) is formed in the plug-in seat (27), a T-shaped plug-in plate (25) is fixedly arranged on the bottom of the supporting plate (23), and the plug-in plate (25) is inserted into the plug-in groove (28) and is detachably connected with the plug-in seat (27).

7. The small-sized hand-held sander with a guide function according to claim 1, characterized in that: A screw hole (29) is formed in the middle position of the sliding plate (211), a locking bolt (210) is assembled in the screw hole (29), and the inner end of the locking bolt (210) penetrates through the sliding plate (211) and extends into the ring groove (26).

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