Handheld grooving machine
By designing a liftable movable guard and locking mechanism on the handheld grooving machine, the problems of poor guard protection and saw blade scratching the ground are solved, achieving better protection and safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-17
- Publication Date
- 2026-03-10
AI Technical Summary
The existing handheld grooving machine's protective cover design has the problem of debris and dust splashing out, and the saw blade is prone to scratching the ground after use.
The protective cover is designed with a fixed cover and a movable cover. The movable cover can be raised and lowered synchronously with the cutting depth, and can be locked and unlocked through a locking mechanism to ensure that the saw blade does not scratch the ground in different placement states.
It effectively prevents debris and dust from splashing out, and ensures that the saw blade does not scratch the ground after use, thus improving safety and ease of use.
Smart Images
Figure CN223981258U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of power tool technology and relates to a handheld grooving machine. Background Technology
[0002] Handheld grooving machines are a very common type of power tool. The principle behind grooving machines is that a motor drives a saw blade to rotate and perform grooving operations. During the grooving process, the high-speed rotation of the saw blade generates flying debris and dust. Therefore, grooving machines are equipped with a protective cover, which covers the outer perimeter of the saw blade to block this debris and dust, reducing harm to operators, surrounding objects, and equipment. It also reduces the spread of dust in the surrounding environment, keeping the work area clean.
[0003] However, the protective covers of existing handheld grooving machines are generally designed as semi-circular. Since the protective cover is fixed to the casing of the grooving machine, if the protective cover is made too large, it will affect the cutting depth of the saw blade. However, in actual use, debris and dust will still fly out from the opening of the protective cover, and it cannot achieve a complete protection effect.
[0004] After use, if a handheld grooving machine is placed directly on the ground, the saw blade will directly contact the ground and scratch it. Therefore, after each use, the grooving machine needs to be placed upside down or on its side. However, when the grooving machine is placed upside down or on its side, the saw blade is exposed, which poses a safety hazard. Utility Model Content
[0005] The purpose of this invention is to address the aforementioned problems with the protective covers of existing handheld grooving machines, and to propose a handheld grooving machine whose protective cover can be raised and lowered synchronously with the cutting depth.
[0006] The objective of this utility model can be achieved through the following technical solutions:
[0007] A handheld grooving machine includes a housing, a saw blade and a motor mounted on the housing. The motor drives the saw blade to rotate for cutting. The housing is also equipped with a protective cover that covers the saw blade. The protective cover is characterized in that it consists of a fixed cover and a movable cover. The fixed cover is fixed to the housing, and the movable cover is movably mounted on the fixed cover and can be raised and lowered relative to the fixed cover. A locking mechanism is also provided between the movable cover and the fixed cover for locking or unlocking the relative positions of the movable cover and the fixed cover.
[0008] In the aforementioned handheld grooving machine, the fixed cover is installed on the upper half of the saw blade, and the movable cover is installed on the lower half of the saw blade.
[0009] In the aforementioned handheld grooving machine, a mounting base is fixedly provided on the fixed cover, and a guide hole is provided on the mounting base. Several guide rods are fixedly provided on the movable cover, and the guide rods are inserted into the guide holes and can move up and down along the guide holes. A spring is sleeved on the guide rod, and a baffle is fixedly provided on the guide rod. The two ends of the spring are pressed against the mounting base and the baffle respectively. The movable cover compresses the spring and rises relative to the fixed cover. The spring pushes the movable cover to descend and reset relative to the fixed cover.
[0010] In the aforementioned handheld grooving machine, the locking mechanism includes a button on the movable cover, a socket and a slot on the movable cover, and a pin on the fixed cover. The socket and slot are arranged at intervals along the moving direction of the movable cover. The pin is laterally slidably mounted on the fixed cover. A return spring is provided inside the fixed cover to push the pin to move horizontally, so that the pin is inserted into the socket or slot to form a lock. The button is provided with two sets of push rods. Pressing the button causes the two push rods to be inserted into the socket and slot respectively, so as to push the pin out of the socket or slot to form an unlock.
[0011] In the aforementioned handheld grooving machine, when the pin is inserted into the socket, the movable cover and the fixed cover are locked together; when the pin is inserted into the slot, the pin can slide back and forth along the slot, and the movable cover can rise and fall relative to the fixed cover.
[0012] In the aforementioned handheld grooving machine, after pressing the button, the spring-driven movable cover is fully reset so that the position of the pin corresponds to the position of the insertion hole.
[0013] In the aforementioned handheld grooving machine, when the pin is inserted into the insertion hole, the bottom surface of the movable cover extends beyond the outermost edge of the saw blade.
[0014] In the aforementioned handheld grooving machine, the slot is shaped like an oblong slot.
[0015] In the aforementioned handheld grooving machine, a reset spring is provided between the movable cover and the button to drive the button to reset.
[0016] In the aforementioned handheld grooving machine, a recessed hole is provided on the movable cover, and a button is movably disposed within the recessed hole.
[0017] Compared with the prior art, the present invention has the following beneficial effects:
[0018] 1. The fixed cover is installed on the upper half of the saw blade, and the movable cover is installed on the lower half of the saw blade. When in use, the movable cover can rise and fall synchronously with the cutting depth of the saw blade, providing multiple protection effects without affecting the cutting effect.
[0019] 2. Locking and unlocking are achieved by controlling the movement of the pin via a button. When in use, press the button to dislodge the pin from the socket, push the movable cover upwards and release the button to insert the pin into the slot. The movable cover can then rise and fall relative to the fixed cover to perform grooving operations. After use, press the button to dislodge the pin from the slot. The spring pushes the movable cover to fully reset. After releasing the button, the pin inserts into the socket, locking the movable cover and the fixed cover. At this point, no matter how the grooving machine is positioned, the saw blade will not scratch the ground. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0021] Figure 2 This is an enlarged schematic diagram of the protective cover of this utility model;
[0022] Figure 3 This is an enlarged cross-sectional view of the locking mechanism of this utility model;
[0023] Figure 4 This is an enlarged schematic diagram of the recessed hole on the movable cover of this utility model;
[0024] Figure 5 This is an enlarged schematic diagram of the insertion hole and pin on the movable cover of this utility model;
[0025] Figure 6 This is a structural schematic diagram of the button of this utility model;
[0026] Figure 7 This is an enlarged schematic diagram of the pin on the fixing cover of this utility model.
[0027] In the diagram, 1 is the housing; 2 is the fixed cover; 3 is the movable cover; 4 is the mounting base; 5 is the guide rod; 6 is the spring; 7 is the baffle; 8 is the button; 9 is the socket; 10 is the slot; 11 is the pin; 12 is the push rod; and 13 is the recess. Detailed Implementation
[0028] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.
[0029] The present invention provides a handheld grooving machine, which includes a housing 1, a saw blade and a motor mounted on the housing 1. The motor drives the saw blade to rotate for cutting. The housing 1 is also provided with a protective cover that covers the saw blade.
[0030] like Figure 1As shown, the protective cover is divided into a fixed cover 2 and a movable cover 3. The fixed cover 2 is fixed to the machine housing 1, and the movable cover 3 is movably mounted on the fixed cover 2 and can be raised and lowered relative to the fixed cover 2. A locking mechanism is also provided between the movable cover 3 and the fixed cover 2 to lock or unlock the relative positions of the movable cover 3 and the fixed cover 2. The fixed cover 2 covers the upper half of the saw blade, and the movable cover 3 covers the lower half of the saw blade.
[0031] like Figure 2 As shown, a mounting base 4 is fixedly mounted on the fixed cover 2, and a guide hole is provided on the mounting base 4. Several guide rods 5 are fixedly mounted on the corresponding movable cover 3. The guide rods 5 are inserted into the guide holes and can move up and down along the guide holes. A spring 6 is sleeved on the guide rod 5, and a baffle 7 is fixedly mounted on the guide rod 5. The two ends of the spring 6 are pressed against the mounting base 4 and the baffle 7 respectively. The movable cover 3 compresses the spring 6 and rises relative to the fixed cover 2. The spring 6 pushes the movable cover 3 to descend and reset relative to the fixed cover 2.
[0032] like Figures 3 to 7 As shown, the locking mechanism includes a button 8 on the movable cover 3, a socket 9 and a slot 10 on the movable cover 3, and a pin 11 on the fixed cover 2. The socket 9 and the slot 10 are arranged at intervals along the moving direction of the movable cover 3. The pin 11 is laterally slidably disposed on the fixed cover 2. A return spring 6 is provided inside the fixed cover 2 to push the pin 11 to move horizontally so that the pin 11 is inserted into the socket 9 or the slot 10 to form a lock. The button 8 is provided with two sets of push rods 12. Pressing the button 8 causes the two push rods 12 to be inserted into the socket 9 and the slot 10 respectively, so as to push the pin 11 out of the socket 9 or the slot 10 to form an unlock.
[0033] like Figure 4 and Figure 5 As shown, the slot 10 is shaped like an oblong groove. A return spring 6 is provided between the movable cover 3 and the button 8 to drive the button 8 to reset. A recessed hole 13 is provided on the movable cover 3, and the button 8 is movably disposed in the recessed hole 13.
[0034] When in use, press button 8 to disengage pin 11 from socket 9, push the movable cover 3 upward and release button 8 to insert pin 11 into slot 10. When pin 11 is inserted into slot 10, pin 11 can slide back and forth along slot 10, and the movable cover 3 can rise and fall relative to the fixed cover 2 to perform grooving operations.
[0035] After use, press button 8 to disengage pin 11 from slot 10. Spring 6 drives movable cover 3 to fully reset so that the position of pin 11 corresponds to the position of socket 9. When pin 11 is inserted into socket 9, movable cover 3 and fixed cover 2 are locked together. The bottom surface of movable cover 3 extends beyond the outermost edge of saw blade. At this time, no matter how the grooving machine is placed, the saw blade will not scratch the ground.
[0036] It should be understood that in the claims and description of this utility model, all instances of "comprising..." should be understood as having an open meaning, that is, their meaning is equivalent to "containing at least...", and should not be understood as having a closed meaning, that is, their meaning should not be understood as "containing only...".
[0037] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.
Claims
1. A hand-held slotter comprising a casing (1) and a saw blade and a motor arranged on the casing (1), the motor driving the saw blade to rotate for cutting, and a shroud arranged on the casing (1) and covering the saw blade, characterized in that, The shield is divided into a fixed shield (2) and a movable shield (3), the fixed shield (2) is fixed on the casing (1), and the movable shield (3) is movably arranged on the fixed shield (2) and can be lifted relative to the fixed shield (2); a locking mechanism is further arranged between the movable shield (3) and the fixed shield (2) and is used for locking or unlocking the relative position of the movable shield (3) and the fixed shield (2).
2. A hand-held slotter as claimed in claim 1, characterized in that The fixed shield (2) covers the upper half of the saw blade, and the movable shield (3) covers the lower half of the saw blade.
3. A hand-held slotter as claimed in claim 1, wherein, A mounting seat (4) is fixed on the fixed shield (2), a guide hole is formed in the mounting seat (4), a plurality of guide rods (5) are fixed on the movable shield (3), the guide rods (5) are inserted into the guide hole and can be lifted along the guide hole, a spring (6) is sleeved on the guide rod (5), a baffle (7) is fixed on the guide rod (5), and the two ends of the spring (6) are pressed against the mounting seat (4) and the baffle (7) respectively, the movable shield (3) compresses the spring (6) and is lifted relative to the fixed shield (2), and the spring (6) pushes the movable shield (3) to be lowered and reset relative to the fixed shield (2).
4. A hand-held slotter as claimed in claim 1, wherein, The locking mechanism comprises a button (8) arranged on the movable shield (3), a plug hole (9) and a plug groove (10) formed in the movable shield (3), and a plug pin (11) arranged on the fixed shield (2), the plug hole (9) and the plug groove (10) are arranged in a spaced manner along the moving direction of the movable shield (3), the plug pin (11) is transversely and slidably arranged on the fixed shield (2), a reset spring (6) is arranged in the fixed shield (2) and is used for pushing the plug pin (11) to translate, so that the plug pin (11) is inserted into the plug hole (9) or the plug groove (10) to form locking, two push rods (12) are arranged on the button (8), the button (8) is pressed, the two push rods (12) are inserted into the plug hole (9) and the plug groove (10) respectively, and the plug pin (11) is pushed out of the plug hole (9) or the plug groove (10) to form unlocking.
5. A hand-held slotter as claimed in claim 4, characterised in that, When the plug pin (11) is inserted into the plug hole (9), the movable shield (3) and the fixed shield (2) are locked; when the plug pin (11) is inserted into the plug groove (10), the plug pin (11) can slide back and forth along the plug groove (10), and the movable shield (3) can be lifted relative to the fixed shield (2).
6. A hand-held slotter according to claim 4, characterised in that, After the button (8) is pressed, the spring (6) drives the movable shield (3) to be completely reset, so that the position of the plug pin (11) corresponds to the position of the plug hole (9).
7. A hand-held slotter as claimed in claim 4, wherein When the plug pin (11) is inserted into the plug hole (9), the bottom surface of the movable shield (3) exceeds the outermost edge of the saw blade.
8. A hand-held slotter according to claim 4, characterised in that, The plug groove (10) is in the shape of a waist-shaped groove.
9. A hand-held slotter as claimed in claim 4, wherein, A reset spring (6) is arranged between the movable shield (3) and the button (8) and is used for driving the button (8) to be reset.
10. A hand-held slotter as claimed in claim 4, wherein, A recess hole (13) is formed in the movable shield (3), and the button (8) is movably arranged in the recess hole (13).