Shield assembly and cutting device

Abstract

The present invention relates to a shield assembly and a cutting device. The shield assembly includes a first shield and a second shield that are movably arranged, and an intermediate shaft connecting the two shields, and has a closed first state and an open second state; the first shield includes a first housing and a clamping seat arranged on the first housing, the second shield includes a second housing and a locking pin connected to the second housing, the locking pin includes a first section and a second section with different diameters, and the diameter of the first section is greater than that of the second section; the clamping seat includes a first hole for receiving the first section, a second hole for receiving the second section, and an opening penetrating the first hole and the second hole from the side, the second section can freely pass through the opening, while the first section cannot pass through the opening, and in the second state, the first section is clamped in the first hole. By providing a holding device composed of a locking pin and a clamping seat on the shield assembly, the present invention improves the stability of the shield assembly in the second state and greatly enhances the user's safety in use.

Description

Technical Field

[0001] The present invention relates to a shield assembly and a cutting device, and particularly to a shield assembly used in occasions such as construction, decoration, and building, and a cutting device having the shield assembly.

Background Art

[0002] A cutting device is a type of power tool driven by a motor to drive a speed reduction structure and drive an output shaft to rotate. A saw blade is installed on the output shaft to perform cutting operations on wood, stone, etc. To protect the safety of user operations, a shield assembly is installed on the cutting device. The shield assembly at least partially covers the outer periphery of the saw blade. Further, the shield assembly includes a fixed shield installed on the cutting device and a movable shield movably connected to the fixed shield. In the field of construction engineering, to ensure the integrity and aesthetics of the wall surface, especially when carrying out water and electricity and pipeline construction, it is necessary to groove the wall surface. Especially when cutting a right-angled wall surface, it is necessary to open the movable shield and keep the movable shield in the open position to ensure that the user can perform continuous operations.

[0003] For the shield assembly in the prior art, reference can be made to the Chinese Utility Model Patent No. CN211807038U announced on October 30, 2020, which discloses: a hand-held grooving machine, including a machine body, a head shell, a cutting saw blade, a saw blade fixed cover, and a saw blade movable cover. The saw blade fixed cover is fixed on one side of the head shell and covers the upper rear part of the cutting saw blade. The saw blade movable cover covers the upper front part of the cutting saw blade. The rear end of the saw blade movable cover is hinged to the front end of the saw blade fixed cover through a hinge shaft. The front end of the saw blade movable cover is a free end and is provided with an elastic stop piece. The saw blade movable cover can be turned upward relative to the saw blade fixed cover, and further includes a limit tension spring. One end of the limit tension spring is connected to the saw blade fixed cover, and the other end is connected to the saw blade movable cover. By setting a limit tension spring between the movable cover and the fixed cover in the above patent, the saw blade movable cover can be kept in the lower or upper turning state without shaking randomly. However, since the tension spring is externally hung on the outer sides of the movable cover and the fixed cover, the user may accidentally touch the tension spring during the operation process; and there is no locking structure at the open position where the movable cover is turned upward, and the movable cover is prone to move, resulting in poor safety.

[0004] In view of this, it is indeed necessary to provide an improved shield assembly and a cutting device to overcome the defects existing in the prior art.

Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide a shield assembly and a cutting device with high safety.

[0006] The present invention can adopt the following technical solutions to solve the problems of the prior art: A shield assembly for a cutting device, the shield assembly includes a first shield and a second shield that are relatively movably arranged and an intermediate shaft connecting the first shield and the second shield. The second shield pivots around the intermediate shaft and has a first closed state and a second open state; the first shield includes a first housing and a clamping seat arranged on the first housing, the second shield includes a second housing and a locking pin connected to the second housing. The locking pin includes a first section and a second section with different diameters, and the diameter of the first section is greater than that of the second section; the clamping seat includes a first hole for receiving the first section, a second hole for receiving the second section, and an opening penetrating the first hole and the second hole from the side. The second section can freely pass through the opening, while the first section cannot pass through the opening. In the second state, the first section is clamped in the first hole.

[0007] A further improvement scheme is: The second housing includes a pair of connecting arms connecting the locking pin. The pair of connecting arms are spaced apart to form an activity space. In the second state, the clamping seat is located in the activity space.

[0008] A further improvement scheme is: The second housing includes a third hole and a fourth hole penetrating the pair of connecting arms, and the locking pin is disposed between the third hole and the fourth hole.

[0009] A further improvement scheme is: The locking pin includes a third section connected to the second section. The diameter of the third section is smaller than that of the second section. The first section is disposed in the third hole, the third section is disposed in the fourth hole, the second section is located between the pair of connecting arms, and the diameter of the second section is greater than the diameter of the fourth hole and smaller than the diameter of the third hole.

[0010] A further improvement scheme is: The clamping seat includes a guiding surface disposed adjacent to the first hole. The locking pin includes a guiding portion located between the first section and the second section, and the guiding portion is in contact with the guiding surface.

[0011] A further improvement scheme is: The guiding portion is a chamfered portion connecting the first section and the second section, and the chamfered portion smoothly transitions from the second section towards the first section.

[0012] A further improvement scheme is: The locking pin includes a fourth section connected to the third section. The second shield includes a button mounted on the fourth section and an elastic member biasing the button. The button is located outside the pair of connecting arms, one end of the elastic member abuts against the button, and the other end abuts against the connecting arm.

[0013] A further improvement solution is as follows: The first hole is formed by inward depression from the end face of the clamping seat, and the second hole communicates with the first hole.

[0014] A further improvement solution is as follows: The shield assembly includes a torsion spring sleeved on the outer periphery of the intermediate shaft. One end of the torsion spring is connected to the first shield, and the other end is connected to the second shield.

[0015] The present invention can also adopt the following technical solution to solve the problems of the prior art: A cutting device includes a housing, a driving assembly installed in the housing, and a shield assembly connected to the housing; the shield assembly is the shield assembly of any one of the above.

[0016] Compared with the prior art, the present invention has the following beneficial effects: By providing a holding device composed of a locking pin and a clamping seat on the shield assembly, the stability of the shield assembly in the second state is improved, and the user's use safety is greatly enhanced. A guiding portion is provided on the locking pin, and a guiding surface is provided on the clamping seat. The guiding portion and the guiding surface are in contact with each other, driving the first section to move into the first hole, so that when the user switches the second shield from the first state to the second state, there is no need to toggle the button, and only the torsion of the torsion spring needs to be overcome to flip the second shield to complete the operation, greatly improving the convenience of use and the user experience is very good.

Description of the Drawings

[0017] The following further describes in detail the specific embodiments of the present invention with reference to the drawings:

[0018] Figure 1 is the overall structural schematic diagram of the cutting device of the present invention;

[0019] Figure 2 is Figure 1 the overall structural schematic diagram of the cutting device shown from another angle;

[0020] Figure 3 is Figure 2 the structural schematic diagram of the cutting device shown with part of the shield assembly removed;

[0021] Figure 4 is Figure 2 the structural schematic diagram of the shield assembly in the cutting device shown, at this time the second shield is in the first state;

[0022] Figure 5 is Figure 4 the structural schematic diagram of the shield assembly shown from another angle;

[0023] Figure 6 is Figure 4 the structural schematic diagram of the shield assembly shown with the second shield in the second state;

[0024] Figure 7 is Figure 6 Schematic structural view of the shield assembly with the second housing removed;

[0025] Figure 8 is Figure 5 Exploded schematic view of the shown shield assembly;

[0026] Figure 9 is Figure 4 Schematic structural view of the shown shield assembly from another angle;

[0027] Figure 10 is Figure 8 Schematic structural view of the locking pin in the shown shield assembly.

Detailed implementation manners

[0028] The present invention will be further described in detail below in conjunction with the drawings and the implementation manners.

[0029] Please refer to Figure 1 and Figure 2 As shown, the implementation manner of the present invention relates to a cutting device 100, on which a cutting blade 200 is installed. The cutting device 100 includes an elongated housing 20, a driving assembly (not shown) installed in the housing 20, a holding portion 30 connected to the housing 20, and a shield assembly 10 connected to the front end of the housing 20. The shield assembly 10 at least partially covers the outer periphery of the cutting blade 200. The cutting blade 200 is connected to the driving assembly. The driving assembly is started under the action of a power source, driving the cutting blade 200 to rotate at a high speed for cutting operations.

[0030] In this implementation manner, the above-mentioned holding portion 30 includes a first holding portion 31 adjacent to the shield assembly 10, a second holding portion 32 away from the shield assembly 10, a strengthening portion 33 located between the first holding portion 31 and the second holding portion 32, and a third holding portion 34 protruding upward from the end of the first holding portion 31. One end of the first holding portion 31 and the second holding portion 32 are respectively connected to the housing 20, and one end of the strengthening portion 33 is connected to the housing 20, and the other end is connected to the converging portion of the first holding portion 31 and the second holding portion 32. The strengthening portion 33 is beneficial to improving the overall strength of the holding portion 30, making the holding portion 30 not easily damaged.

[0031] Furthermore, the user can grasp one or more of the first holding portion 31, the second holding portion 32, and the third holding portion 34 to perform operations, greatly improving the operability.

[0032] Please refer to Figures 3 to 8As shown in the figure, the above-mentioned shield assembly 10 includes a first shield 1 and a second shield 2 that are relatively movably arranged, an intermediate shaft 3 connecting the first shield 1 and the second shield 2, and a torsion spring 4 sleeved on the outer periphery of the intermediate shaft 3. In this embodiment, the first shield 1 is a fixed shield installed on the housing 20, and the second shield 2 is a movable shield that pivots relative to the first shield 1 around the intermediate shaft 3. Specifically, the above-mentioned first shield 1 covers the upper rear part of the cutting blade 200, the second shield 2 covers the upper front part of the cutting blade 200, and the rear end of the second shield 2 is hinged to the front end of the first shield 1 through the intermediate shaft 3.

[0033] In this embodiment, the front end of the above-mentioned second shield 2 is a free end. The second shield 2 can be flipped relative to the first shield 1, and the second shield 2 has a closed first state and an open second state. Further, one end of the torsion spring 4 is connected to the first shield 1, and the other end is connected to the second shield 2. The torsion force of the torsion spring 4 acts on the second shield 2, causing the second shield 2 to rotate and closely adhere to the first shield 1, effectively ensuring that the second shield 2 in the first state is not easily loosened.

[0034] In this embodiment, in the first state, the above-mentioned shield assembly 10 can cover the cutting blade 200 with the largest area to effectively protect dust, mud, etc. splashing out during cutting; when cutting the corner position of a wall or the ground is required, the user needs to flip the second shield 2 upward by hand to expose the cutting blade 200.

[0035] Specifically, during the process of switching from the first state to the second state, by flipping the second shield 2 around the intermediate shaft 3, the front end of the cutting blade 200 is exposed, and the shield assembly 10 further includes a holding device that enables the second shield 2 to be locked in the second state to ensure that the user can perform continuous and safe operations.

[0036] Please refer to Figures 4 to 9 As shown in the figure, the above-mentioned first shield 1 includes a first housing 11 and a clamping seat 12 arranged on the first housing 11, and the second shield 2 includes a second housing 21, a locking pin 22 connected to the second housing 21, a button 23 connected to the locking pin 22, and an elastic member 24 biasing the button 23. In the first state, the first housing 11 and the second housing 21 are in contact with each other, and under the action of the torsion spring 4, the first housing 11 and the second housing 21 are closely attached to each other and are not easily loosened; in the second state, the second shield 2 is held in the clamping seat 12 via the locking pin 22 so that the second shield 2 is maintained in the second state.

[0037] Please combine with Figure 10As shown, the above-mentioned locking pin 22 includes a first section 221 and a second section 222 with different diameters, a third section 223 connected to the second section 222, a fourth section 224 connected to the third section 223, and a guiding portion 228 located between the first section 221 and the second section 222. Among them, the diameter of the first section 221 is greater than that of the second section 222, and the diameter of the second section 222 is greater than that of the third section 223, that is, the diameters of the first section 221, the second section 222, and the third section 223 decrease in sequence. The button 23 is installed on the fourth section 224. The above-mentioned clamping seat 12 includes a first hole 121 for accommodating the first section 221, a second hole 122 for accommodating the second section 222, and an opening 123 penetrating the first hole 121 and the second hole 122 from the side. Among them, the second section 222 can freely pass through the opening 123 and enter the second hole 122, while the first section 221 cannot pass through the opening 123 and directly enter the first hole 121. During the actual operation process, it is necessary to move the locking pin 22 along the axial direction of the locking pin 22 so that the end of the first section 221 close to the second section 222 exceeds the edge of the clamping seat 12, and then the first section 221 and the second section 222 can respectively enter the first hole 121 and the second hole 122.

[0038] In this embodiment, the above-mentioned first hole 121 is formed by being recessed inward from the end face of the clamping seat 12, and the second hole 122 communicates with the first hole 121. In the second state, the first section 221 is clamped in the first hole 121, and since the first section 221 cannot pass through the opening 123, the second shield 2 can be kept in the second state. By providing a holding device composed of the locking pin 22 and the clamping seat 12 on the shield assembly 10, the stability of the shield assembly 10 in the second state is improved, and the user's use safety is greatly enhanced.

[0039] Please refer to Figure 8 and Figure 9 As shown, the above-mentioned second housing 21 includes a pair of connecting arms 211 and 212 connecting the locking pin 22, and a third hole 213 and a fourth hole 214 penetrating the pair of connecting arms 211 and 212. The pair of connecting arms 211 and 212 are spaced apart to form an activity space. In the second state, the clamping seat 12 is located in the activity space, the third hole 213 is located in the first connecting arm 211, and the fourth hole 214 is located in the second connecting arm 212. The locking pin 22 penetrates between the third hole 213 and the fourth hole 214. Specifically, the first section 221 is placed in the third hole 213, the third section 223 is placed in the fourth hole 214, and the second section 222 is located between the pair of connecting arms 211 and 212. The diameter of the second section 222 is greater than the diameter of the fourth hole 214 and less than the diameter of the third hole 213. During actual assembly, the locking pin 22 enters from the third hole 213 via the fourth section 224 and moves towards the fourth hole 214 until the second section 222 cannot pass through the fourth hole 214 and abuts against the inner side wall of the second connecting arm 212.

[0040] In this embodiment, the above-mentioned button 23 is located outside a pair of connecting arms 211 and 212. One end of the elastic member 24 abuts against the button 23, and the other end abuts against the outer side wall of the connecting arm 212. The elastic member 24 provides a biasing force toward the button 23 side, so that when the second shield 2 is in the second state, the first section 221 of the locking pin 22 is clamped in the first hole 121 and is not likely to become loose, further improving the safety of the user during use.

[0041] In this embodiment, the above-mentioned elastic member 24 is a compression spring.

[0042] Please refer to Figures 7 to 9 As shown, the above-mentioned engaging seat 12 further includes a guiding surface 124 disposed adjacent to the first hole 121, and the guiding portion 228 contacts the guiding surface 124. Specifically, the guiding portion 228 is a chamfered portion connecting the first section 221 and the second section 222, and this chamfered portion smoothly transitions from the second section 222 toward the first section 221. By providing the guiding portion 228 on the locking pin 22 and the guiding surface 124 on the engaging seat 12, and the guiding portion 228 contacts the guiding surface 124, driving the first section 221 to move into the first hole 121, when the user switches the second shield 2 from the first state to the second state, there is no need to toggle the button 23, and only by overcoming the torsion force of the torsion spring 4 to flip the second shield 2, the operation can be completed, greatly improving the convenience of use and providing a good user experience.

[0043] Furthermore, when switching the above-mentioned second shield 2 from the second state to the first state, the user needs to overcome the pressure of the elastic member 24 to press the button 23, driving the first section 221 of the locking pin 22 to disengage from the first hole 121, and then the second shield 2 returns to the first state under the torsion force of the torsion spring 4.

[0044] In this embodiment, the above-mentioned chamfered portion is a rounded chamfer or an inclined chamfer.

[0045] The present invention improves the stability of the shield assembly 10 in the second state by providing a holding device composed of a locking pin 22 and an engaging seat 12 on the shield assembly 10, and greatly improves the safety of the user during use. By providing the guiding portion 228 on the locking pin 22 and the guiding surface 124 on the engaging seat 12, and the guiding portion 228 contacts the guiding surface 124, driving the first section 221 to move into the first hole 121, when the user switches the second shield 2 from the first state to the second state, there is no need to toggle the button 23, and only by overcoming the torsion force of the torsion spring 4 to flip the second shield 2, the operation can be completed, greatly improving the convenience of use and providing a good user experience.

[0046] The present invention is not limited to the above specific embodiments. Those of ordinary skill in the art can easily understand that there are many other alternative solutions for the shield assembly and cutting device of the present invention without departing from the principles and scope of the present invention. The protection scope of the present invention shall be subject to the content of the claims.

Claims

1. A shield assembly for a cutting device having a cutting blade mounted thereon, the shield assembly comprising a first shield and a second shield that are relatively movably arranged, and an intermediate shaft connecting the first shield and the second shield, the first shield covering at least a portion of the cutting blade, the second shield pivoting about the intermediate shaft and having a first closed state and a second open state; characterized in that: The first shield includes a first housing and a clamping seat disposed on the first housing. The clamping seat and the cutting disc are respectively located on two sides of the first housing. The second shield includes a second housing and a locking pin connected to the second housing. The locking pin includes a first section and a second section with different diameters, and the diameter of the first section is greater than that of the second section. The clamping seat includes a first hole for receiving the first section, a second hole for receiving the second section, and an opening penetrating the first hole and the second hole from the side. The second section can freely pass through the opening, while the first section cannot pass through the opening. In the second state, the first section is clamped in the first hole. The second housing includes a pair of connecting arms connecting the locking pin. The pair of connecting arms are spaced apart to form an activity space. In the second state, the clamping seat is located in the activity space. The second housing includes a third hole and a fourth hole penetrating the pair of connecting arms. The locking pin is disposed between the third hole and the fourth hole.

2. The shield assembly according to claim 1, wherein: The locking pin includes a third section connected to the second section. The diameter of the third section is smaller than that of the second section. The first section is disposed in the third hole, the third section is disposed in the fourth hole, the second section is located between the pair of connecting arms, and the diameter of the second section is greater than the diameter of the fourth hole and smaller than the diameter of the third hole.

3. The shield assembly according to claim 2, wherein: The clamping seat includes a guiding surface disposed adjacent to the first hole. The locking pin includes a guiding portion located between the first section and the second section. The guiding portion and the guiding surface are in contact with each other.

4. The shield assembly according to claim 3, wherein: The guiding portion is a chamfered portion connecting the first section and the second section, and the chamfered portion smoothly transitions from the second section towards the first section.

5. The shield assembly according to claim 2, wherein: The locking pin includes a fourth section connected to the third section. The second shield includes a button mounted on the fourth section and an elastic member biasing the button. The button is located outside the pair of connecting arms. One end of the elastic member abuts against the button, and the other end abuts against the connecting arm.

6. The shield assembly according to claim 1, characterized in that: The first hole is formed by being recessed inward from the end face of the clamping seat, and the second hole communicates with the first hole.

7. The shield assembly according to claim 1, wherein: The shield assembly includes a torsion spring sleeved on the outer periphery of the intermediate shaft. One end of the torsion spring is connected to the first shield, and the other end is connected to the second shield.

8. A cutting device, comprising a housing, a driving assembly installed in the housing, and a shield assembly connected to the housing; characterized in that: The shield assembly is the shield assembly according to any one of claims 1 to 7 above.

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