CN117549183B

CN117549183B - Angle grinder

Info

Publication number: CN117549183B
Application number: CN202410037920.4A
Authority: CN
Inventors: 曾细杰
Original assignee: Fujian Huian Kynko Electrical Machinery Co ltd
Current assignee: Fujian Huian Kynko Electrical Machinery Co ltd
Priority date: 2024-01-11
Filing date: 2024-01-11
Publication date: 2024-03-19
Anticipated expiration: 2044-01-11
Also published as: CN117549183A

Abstract

The invention relates to the technical field of angle grinders, in particular to an angle grinder. The novel saw blade comprises a shell, a control board, a brushless motor, saw blades and a protective cover, wherein the control board is arranged in the shell, a button is arranged at the tail of the shell for starting, the brushless motor is matched with the control saw blade through a bevel gear set for rotating, the protective cover is arranged on the outer side of the saw blade in a locking mode, connecting holes are formed in the two sides of the saw blade shell in a leaning mode, any one connecting hole is connected with a water injection assembly, and the other connecting hole is connected with a guide assembly. The invention can be suitable for the generation of dust during cutting through the water injection assembly, and the influence of the dust on the sight line and the cutting precision are avoided; through connecting the water pipe at the water injection hole, after unidirectionally introducing rivers, constantly repeat decurrent extrusion action through motor control piston piece, promote the water yield of water pipe in the protection casing inboard, on the one hand, water can reduce saw bit temperature, improves the cutting effect of saw bit and hard thing, on the other hand, and most dirt is restrained by water, avoids dust to fly away.

Description

Angle grinder

Technical Field

The invention relates to the technical field of angle grinders, in particular to an angle grinder.

Background

The electric angle grinder is to grind, cut, remove rust and polish metal components by using a sheet grinding wheel rotating at high speed, a rubber grinding wheel, a steel wire wheel and the like. The angle grinder is suitable for cutting, grinding and brushing metal and stone.

The angle grinder can be replaced with a grinding wheel, a saw blade and the like to meet the use requirements, but the operability of the angle grinder can be affected to a certain extent due to different use scenes of the angle grinder. The hand-held angle grinder in the prior art is generally provided with the auxiliary handle on the angle grinder, but the two hand-operated angle grinder is only suitable for cutting objects which are not easy to cut by using the angle grinder, and the two hands are matched with each other to better apply acting force, so that the saw blade is fully contacted with the objects, and further the grinding effect is improved to a certain extent; in practical application, the auxiliary handle can not be well matched with control to perform batch cutting; and when the polishing is required to be refined, the auxiliary handle can not lift the operation requirement of the angle grinder for the fine polishing. Therefore, how to enable the angle grinder to be suitable for different scenes is particularly important to improve the functional requirement of the angle grinder.

Disclosure of Invention

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description and the appended drawings.

The invention aims to overcome the defects, and provides an angle grinder which comprises a shell, a control board, a brushless motor, a saw blade and a protective cover, wherein the control board is arranged in the shell, a button is arranged at the tail part of the shell for starting, the brushless motor is matched with the saw blade for controlling rotation, the protective cover is fixedly arranged at the outer side of the saw blade, connecting holes are arranged towards two sides of the saw blade shell, any one connecting hole is connected with a water injection component, the other connecting hole is connected with a guide component, the water injection component comprises a water storage cylinder, a piston sheet is arranged in the top end of the water storage cylinder and is matched with the piston sheet through a small motor for pushing, the side surface of the bottom end of the water storage cylinder is connected and penetrated to the protective cover through a water guide pipe, a water stop valve is arranged on the water guide pipe, the guide component comprises a mounting bracket, a wheel frame and a guide wheel, the wheel frame is matched with the mounting bracket in a rotating way, and the guide wheel is rotatably mounted on the wheel frame.

Further, set up a plurality of mounting groove on the wheel carrier, the width of mounting groove is greater than the width of guide pulley, and the wheel carrier side sets up the extension hole, and the direction subassembly still includes the extension frame, and extension frame side sets up the connector with extension hole matching, sets up the mounting groove on the extension frame.

Further, the edge of the guide wheel is in a pointed cone structure.

Further, the one end of little motor sets up the semi-gear, and the top connection of piston piece sets up the pinion rack, and the pinion rack is along the vertical slip of water storage section of thick bamboo, and the both sides of pinion rack set up the first spring that is used for resetting the piston piece, set up the stopper on the inside of water storage section of thick bamboo, and the stopper is located the bottom of piston piece, and the below side of stopper sets up the water injection hole, and the water flow direction of water injection hole is one-way from outer to interior.

Further, the brushless motor comprises a permanent magnet rotor, a multipolar winding stator and a position sensor, wherein two ends of the permanent magnet rotor in the casing are arranged through bearings, motor cooling grease is smeared on the outer edge of the multipolar winding stator, and the brushless motor is closed through a closing cover.

Further, the installing support divide into upper frame, lower carriage, and the upper frame sets up the sliding tray, and lower carriage top sets up the protruding pole, and the protruding pole slides along the sliding tray, and sets up the second spring in the sliding tray, and the one end laminating of second spring is provided with the regulating plate, and upper frame side is provided with opening structure and the foundation plate that supplies the regulating plate to adjust, through screw control its interval with the regulating plate on the foundation plate for when protruding pole and sliding tray sliding fit, increase or reduce the displacement distance of protruding pole.

Further, the bevel gear group comprises a driving bevel gear and a driven bevel gear, the driving bevel gear is arranged on one side of the brushless motor, the driving bevel gear is meshed with the driven bevel gear, and the driven bevel gear synchronously rotates with the saw blade through an output shaft.

Further, an automatic lubrication structure is arranged in the driving bevel gear, an external oil filling port is arranged on the shell at the position where the driving bevel gear is located, a filling port is arranged at the side end of the driving bevel gear, an external oil filling port is used for inserting an oil filling pipe, and the tail end of the oil filling pipe extends and is inserted into the filling port.

By adopting the technical scheme, the invention has the beneficial effects that:

according to the invention, the guide assembly is used for improving the edge cutting capacity of the angle grinder, meanwhile, the position of the guide wheel can be flexibly adjusted, and displacement errors can be reduced through the cooperation of one or a plurality of guide wheels.

The invention can be suitable for the generation of dust during cutting through the water injection assembly, and the influence of the dust on the sight line and the cutting precision are avoided; through connecting the water pipe at the water injection hole, after unidirectionally introducing rivers, constantly repeat decurrent extrusion action through motor control piston piece, promote the water yield of water pipe in the protection casing inboard, on the one hand, water can reduce saw bit temperature, improves the cutting effect of saw bit and hard thing, on the other hand, and most dirt is restrained by water, avoids dust to fly away.

According to the automatic lubrication structure, the outflow of lubricating oil is reasonably controlled, so that the bevel gear set can keep proper lubrication degree, and the lubricating oil can be flexibly filled into the bevel gear set.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

It is apparent that these and other objects of the present invention will become more apparent from the following detailed description of the preferred embodiments, which is to be read in connection with the accompanying drawings and figures.

The foregoing and other objects, features and advantages of the invention will be apparent from the following more particular description of the preferred embodiments, as illustrated in the accompanying drawings.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention, without limitation to the invention.

In the drawings, like parts are designated with like reference numerals and are illustrated schematically and are not necessarily drawn to scale.

In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are only one or several embodiments of the invention, and that other drawings can be obtained according to such drawings without inventive effort to a person skilled in the art.

FIG. 1 is a schematic view of the angle grinder of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

FIG. 3 is a schematic view of a cooling fan in the angle grinder of the present invention;

FIG. 4 is a schematic view of the structure of the inside of the housing of the angle grinder of the present invention;

FIG. 5 is a schematic view showing the structure of a guide assembly in an angle grinder according to embodiment 1 of the present invention;

FIG. 6 is a schematic view showing the structure of an extension frame in the angle grinder of embodiment 1 of the present invention;

FIG. 7 is a schematic view showing the structure of a guide assembly in an angle grinder according to embodiment 2 of the present invention;

FIG. 8 is a schematic view showing the structure of a drive bevel gear in an angle grinder according to embodiment 3 of the present invention;

FIG. 9 is a partial enlarged view at B in FIG. 8;

fig. 10 is a schematic view of the structure of the plugging ball in the angle grinder of example 3 of the present invention.

The main reference numerals illustrate:

a housing; 2. a control board; 3. a brushless motor; 4. a saw blade; 5. a protective cover; 6. a button; 7. a connection hole; 8. a water injection assembly; 9. a guide assembly; 10. a bearing; 11. driving a bevel gear; 12. a driven bevel gear; 13. an external oil filling port; 14. a heat radiation fan; 15. an auxiliary handle; 111. a filler neck; 112. a blocking ball; 113. a plugging seat; 114. an introduction chamber; 115. a branching chamber; 116. a third spring; 117. a spring seat; 118. opening holes; 119. a first passage; 120. a second passage; 121. a third passage; 122. a control ball; 123. a flow-through ball chamber; 124. a restriction member; 81. a water storage cylinder; 82. a piston plate; 83. a small motor; 84. a water conduit; 85. a water stop valve; 86. a half gear; 87. a toothed plate; 88. a first spring; 89. a limiting block; 810. a water injection hole; 91. a mounting bracket; 92. a wheel carrier; 93. a guide wheel; 921. a mounting groove; 922. an elongated aperture; 923. an extension rack; 924. a connector; 911. loading on a frame; 912. placing the frame; 913. a sliding groove; 914. a protruding rod; 915. a second spring; 916. an adjusting plate; 917. a base plate.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the following detailed description. It should be understood that the detailed description is presented merely to illustrate the invention, and is not intended to limit the invention.

In addition, in the description of the present invention, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. However, it is noted that direct connection indicates that the two bodies connected together do not form a connection relationship through a transition structure, but are connected together to form a whole through a connection structure. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

According to some embodiments of the present invention, referring to fig. 1-10, the present invention provides an angle grinder, including a casing 1, a control board 2, a brushless motor 3, a saw blade 4, and a protective cover 5, wherein the control board 2 is disposed in the casing 1, a button 6 is disposed at the tail of the casing 1 to start, the brushless motor 3 controls the saw blade 4 to rotate through cooperation of a bevel gear set, the protective cover 5 is locked and disposed at the outer side of the saw blade 4, a plurality of connection holes 7 are disposed on two sides of the casing 1 of the saw blade 4, any one of the connection holes 7 is connected with a water injection assembly 8, another connection is disposed with a guiding assembly 9, the water injection assembly 8 includes a water storage cylinder 81, a piston 82 is disposed inside a top end of the water storage cylinder 81, the piston 82 is controlled and pushed by a small motor 83, a bottom side of the water storage cylinder 81 is connected and installed to the protective cover 5 through connection of a water guide pipe 84, a water stop valve 85 is disposed on the water guide pipe 84, the guiding assembly 9 includes a mounting bracket 91, a wheel frame 92, a guiding wheel 93 is rotatably fitted with the mounting bracket 91, and the guiding assembly 93 is rotatably mounted on the wheel frame 92. The cooling fan 14 is synchronously driven by the brushless motor 3, and the fan blade structure of the cooling fan 14 leads the heat generated when the angle grinder is started to be outwards guided. The positioning positions of the connecting holes 7 may be set at any position of the casing 1, i.e., the number is not limited, the positions are not limited.

The angle grinder is provided with a plurality of connecting holes 7, and the connecting holes 7 are equivalent to function expansion holes, can be connected with an auxiliary handle 15 like the prior art, and can also be connected with a water injection assembly 8 and a guide assembly 9, so that the functional effect of the traditional angle grinder during operation is enhanced. The guiding component 9 can assist the angle grinder to finely cut along a certain direction, such as: when the ceramic tile is applied to ceramic tile, as the areas of different wall surfaces are inconsistent, a part of the complete ceramic tile needs to be cut off; the master usually holds the cutting, and dust is easy to generate during cutting, and the cutting precision can be influenced to a certain extent. The guide roller 93 is attached along one side of the tile, and then cut.

According to some embodiments of the present invention, optionally, the wheel frame 92 is provided with a plurality of mounting grooves 921, the width of the mounting grooves 921 is larger than the width of the guide wheel 93, the side end of the wheel frame 92 is provided with an extension hole 922, the guide assembly 9 further includes an extension frame 923, the side end of the extension frame 923 is provided with a connector 924 matched with the extension hole 922, and the extension frame 923 is provided with the mounting groove 921 with the same structure as the wheel frame 92. Such as: after the ceramic tile is put on the wall, when the edges of the ceramic tile need to be polished, the guide wheels 93 can be limited to the two sides of the ceramic tile at the side ends, and the angle grinder is assisted to position and polish. The relative position of the guide wheel 93 can be changed by providing a plurality of mounting grooves 921, mounting the guide wheel 93 to different mounting grooves 921; alternatively, the wheel frame 92 is adjusted along the mounting bracket 91, and a locking member for restricting the position of the wheel frame 92 is provided at the side end of the mounting bracket 91, such as: a locking screw is arranged at the bottom end of the mounting bracket 91 and screwed into the mounting bracket 91, the connection position of the wheel frame 92 and the mounting bracket 91 is a butt joint hole, and one end of the locking screw extends to the butt joint hole to lock the wheel frame 92 in the butt joint hole. The extension frame 923 facilitates further lengthening the length of the original wheel frame 92 by threadably engaging the connector 924 with the extension hole 922.

According to some embodiments of the invention, the edges of idler 93 may optionally be tapered.

According to some embodiments of the present invention, optionally, a half gear 86 is disposed at one end of the small motor 83, a toothed plate 87 is disposed at the top end of the piston 82, the toothed plate 87 slides vertically along the water storage cylinder 81, a first spring 88 for resetting the piston 82 is disposed at two sides of the toothed plate 87, a limiting block 89 is disposed on the inside of the water storage cylinder 81, the limiting block 89 is located at the bottom end of the piston 82, a water injection hole 810 is disposed at the lower side end of the limiting block 89, and the water flow direction of the water injection hole 810 is unidirectional from outside to inside. The number of teeth of the half gear 86 is half of that of a circle of complete gear, when the small motor 83 is started, the half gear 86 is meshed with the toothed plate 87 to displace, the toothed plate 87 pushes the piston 82 downwards, and the piston 82 displaces to compress the space below the water storage cylinder 81, so that a certain supercharging effect is achieved; lifting the water output of the water guide pipe 84 in the protective cover 5, such as: when the angle grinder is used for cutting, more dust exists, the water yield is increased, and the dust settling effect is improved. The water flow direction of the water injection hole 810 is unidirectional from outside to inside, which is beneficial to ensuring that the water storage cylinder 81 is connected with an external water pipe, when water is injected, water can enter the water storage cylinder 81 in a unidirectional way, and when no water is injected, water cannot flow out from the water injection hole 810.

According to some embodiments of the present invention, optionally, the brushless motor 3 includes a permanent magnet rotor, a multipolar winding stator, and a position sensor, wherein two ends of the permanent magnet rotor in the casing 1 are installed and arranged through a bearing 10, and the outer edge of the multipolar winding stator is smeared and provided with motor cooling grease, and is closed through a closing cover. The motor cooling grease is favorable for improving the heat dissipation effect.

According to some embodiments of the present invention, optionally, the mounting bracket 91 is divided into an upper frame 911 and a lower frame 912, the upper frame 911 is provided with a sliding groove 913, a protruding rod 914 is provided at the top end of the lower frame 912, the protruding rod 914 slides along the sliding groove 913, a second spring 915 is provided in the sliding groove 913, one end of the second spring 915 is provided with an adjusting plate 916 in a fitting manner, an opening structure for adjusting the adjusting plate 916 and a base plate 917 are provided at the side end of the upper frame 911, and the base plate 917 is provided with a distance between the adjusting plate 916 controlled by a screw, so that when the protruding rod 914 is slidably matched with the sliding groove 913, the displacement distance of the protruding rod 914 is increased or decreased. By reducing the length of the sliding groove 913, the displacement distance of the protruding rod 914 is reduced, the space in which the second spring 915 can be compressed to generate elastic deformation is smaller, the damping sense is indirectly improved, and the control sense of the diagonal mill is improved. The mounting bracket 91 structure is applicable to places with requirements on cutting depth, and the intervention of damping sense can enable a user to control the cutting depth when cutting the same objects in batches; effectively avoid the problem that the saw blade 4 is damaged because the saw blade 4 cuts down to the depth when cutting at high speed. Simple structure, use and low manufacturing cost.

According to some embodiments of the present invention, optionally, the bevel gear set includes a driving bevel gear 11 and a driven bevel gear 12, the driving bevel gear 11 is mounted on one side of the brushless motor 3, the driving bevel gear 11 is engaged with the driven bevel gear 12, and the driven bevel gear 12 rotates synchronously with the saw blade 4 through the output shaft.

According to some embodiments of the present invention, optionally, an automatic lubrication structure is disposed in the driving bevel gear 11, an external oil filling port 13 is disposed on the casing 1 where the driving bevel gear 11 is located, a filling port 111 is disposed at a side end of the driving bevel gear 11, an oil filling pipe (usually made of a hard material) is inserted into the external oil filling port 13, and a tail end of the oil filling pipe extends and is inserted into the filling port 111. A plugging ball 112 is arranged in the filling port 111, the plugging ball 112 is matched with a plugging seat 113 to close the filling port 111, a circulation cavity is arranged in the plugging ball 112, an introduction cavity 114 is arranged on one side of the plugging ball 112 close to the filling port 111 in a penetrating way, a branch cavity 115 is arranged at the side end of the introduction cavity 114, a third spring 116 is elastically connected to the inner side of the plugging ball 112, the third spring 116 is installed through a spring seat 117, and an opening 118 is arranged on the spring seat 117; when the plugging ball 112 is in the initial position, the outer end cup plugging seat 113 of the branch cavity 115 is closed, an oiling passage is arranged in the drive bevel gear 11 and is divided into a first passage 119, a second passage 120 and a third passage 121, the first passage 119, the second passage 120 and the third passage 121 are mutually communicated, the plugging ball 112, the plugging seat 113, the third spring 116 and the spring seat 117 are arranged on the first passage 119, the right side width of the second passage 120 is wider than the left side width, a control ball 122 is arranged on the second passage 120, a circulation ball cavity 123 is arranged on the control ball 122 in a penetrating way, a limiting piece 124 is arranged on the inner side wall of the second passage 120, and the limiting piece 124 limits the control ball 122 to move rightwards; the third passage 121 is narrower toward the outside than toward the inside of the drive bevel gear 11, so that the oil delivery amount can be controlled. The two marks are respectively a first mark and a second mark, the first mark (the filler pipe is connected to the in-place mark) is positioned above the second mark (the filler pipe is not connected to the in-place mark), and the interval between the first mark and the second mark is the maximum distance of the filler pipe inserted into the filler neck 111, so that a user can conveniently install the filler pipe.

When the filler pipe is installed, whether the filler pipe is installed in place or not can be confirmed through the observation window of the shell 1; or before the angle grinder is used (in the case of power failure), the saw blade 4 is rotated, and when the filler pipe is connected in place, the drive bevel gear 11 cannot be freely rotated due to the limitation of the filler pipe.

During oiling, one end of the oiling pipe pushes the blocking ball 112, the blocking ball 112 is separated from the blocking ball 112, space oil supply flow is exposed, meanwhile, part of oil enters the branch cavity 115 from the introducing cavity 114 and then enters the first passage 119 from the branch cavity 115, and in the first passage 119, the oil enters the second passage 120 through the opening 118 on the spring seat 117; the oil in the second passage 120 is further controlled by the flow ball chamber 123 on the control ball 122, and the narrowing structure of the third passage 121 further controls the oil flow when the oil enters the third passage 121. During each lubrication, the oil can be gradually transferred to the tooth surface of the driving bevel gear 11, and the driving bevel gear 11 is continuously and reciprocally meshed with the driven bevel gear 12, so that the contact surface is lubricated in place; avoid the waste of lubricating fluid, the play oil volume of high-efficient control lubricating fluid.

Example 1

Referring to fig. 5 and 6, this embodiment provides an angle grinder, including casing 1, control panel 2, brushless motor 3, saw bit 4, protection casing 5, set up control panel 2 in the casing 1, and casing 1 afterbody sets up button 6 and start, brushless motor 3 passes through bevel gear group cooperation control saw bit 4 rotation, saw bit 4 outside lock sets up protection casing 5, lean on setting up connecting hole 7 to the both sides of saw bit 4 casing 1, arbitrary connecting hole 7 connect and set up water injection subassembly 8, another connection sets up direction subassembly 9, water injection subassembly 8 includes water storage cylinder 81, the inside on water storage cylinder 81 top sets up piston 82, piston 82 passes through little motor 83 control cooperation promotion, water storage cylinder 81's bottom side passes through aqueduct 84 connection through and installs on protection casing 5, set up water stop valve 85 on the aqueduct 84, direction subassembly 9 includes installing support 91, wheel carrier 92, guide pulley 93, wheel 92 and installing support 91 normal running fit, set up a plurality of mounting groove 921 on wheel carrier 92, the width of mounting groove 921 is greater than 93, wheel carrier 92 side end sets up extension piece 922, direction subassembly 9 still includes extension frame 923 side extension end and extension connector 924 side extension end 924 set up with extension piece 924. The edge of guide pulley 93 is pointed cone structure, and the one end of little motor 83 sets up semi-gear 86, and the top connection of piston piece 82 sets up pinion rack 87, and pinion rack 87 is along the vertical slip of water storage section of thick bamboo 81, and the both sides of pinion rack 87 set up the first spring 88 that is used for resetting piston piece 82, set up stopper 89 on the inside of water storage section of thick bamboo 81, and stopper 89 is located the bottom of piston piece 82, and the below side of stopper 89 sets up water injection hole 810, and the rivers direction of water injection hole 810 is one-way from outside to inside.

The brushless motor 3 comprises a permanent magnet rotor, a multipolar winding stator and a position sensor, wherein two ends of the permanent magnet rotor in the shell 1 are arranged through bearings 10, motor cooling grease is smeared on the outer edge of the multipolar winding stator, and the multipolar winding stator is closed through a sealing cover. The bevel gear group comprises a driving bevel gear 11 and a driven bevel gear 12, wherein the driving bevel gear 11 is arranged on one side of the brushless motor 3, the driving bevel gear 11 is meshed with the driven bevel gear 12, and the driven bevel gear 12 rotates synchronously with the saw blade 4 through an output shaft.

Example 2

Referring to fig. 7, this embodiment provides an angle grinder, which is different from embodiment 1 in that: the mounting bracket 91 is divided into an upper frame 911 and a lower frame 912, the upper frame 911 is provided with a sliding groove 913, the top end of the lower frame 912 is provided with a protruding rod 914, the protruding rod 914 slides along the sliding groove 913, a second spring 915 is arranged in the sliding groove 913, one end of the second spring 915 is provided with an adjusting plate 916 in a fitting manner, the side end of the upper frame 911 is provided with an opening structure for adjusting the adjusting plate 916 and a base plate 917, and the distance between the base plate 917 and the adjusting plate 916 is controlled by a screw, so that when the protruding rod 914 is matched with the sliding groove 913 in a sliding manner, the displacement distance of the protruding rod 914 is increased or reduced.

Example 3

Referring to fig. 8 to 10, this embodiment provides an angle grinder, which is different from embodiment 1 in that: an automatic lubrication structure is arranged in the driving bevel gear 11, an external oil filling port 13 is arranged on the shell 1 where the driving bevel gear 11 is located, a filling port 111 is arranged at the side end of the driving bevel gear 11, an oil filling pipe is inserted into the external oil filling port 13, and the tail end of the oil filling pipe extends and is inserted into the filling port 111.

It is to be understood that the disclosed embodiments are not limited to the specific process steps or materials disclosed herein, but are intended to extend to equivalents of such features as would be understood by one of ordinary skill in the relevant arts. It is also to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting.

Reference in the specification to "an embodiment" means that a particular feature, or characteristic, described in connection with the embodiment is included in at least one embodiment of the invention. Thus, appearances of the phrase or "an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment.

Furthermore, the described features or characteristics may be combined in any other suitable manner in one or more embodiments. In the above description, certain specific details are provided, such as thicknesses, numbers, etc., to provide a thorough understanding of embodiments of the invention. One skilled in the relevant art will recognize, however, that the invention can be practiced without one or more of the specific details, or with other methods, components, materials, etc.

Claims

1. The utility model provides an angle grinder, its characterized in that includes casing, control panel, brushless motor, saw bit, protection casing, set up the control panel in the casing, and the casing afterbody sets up the button and starts, brushless motor passes through bevel gear group cooperation control saw bit rotation, the lock sets up the protection casing in the saw bit outside, lean on to the saw bit both sides of casing set up the connecting hole, arbitrary connecting hole is connected and is set up the water injection subassembly, another connection sets up the direction subassembly, the water injection subassembly includes the water storage section of thick bamboo, the inside on water storage section of thick bamboo top sets up the piston piece, the piston piece is pushed through little motor control cooperation, the bottom side of water storage section of thick bamboo is connected through the aqueduct and is installed to the protection casing on, set up the water stop valve on the aqueduct, the direction subassembly includes installing support, wheel carrier and installing support normal running fit, the installing the guide wheel on the wheel carrier normal running, the one end of little motor sets up the half gear, the top connection of piston piece sets up the pinion, the pinion slides vertically along the water storage section of thick bamboo, the both sides of pinion set up the first spring that is used for resetting the piston piece, set up the stopper on the inside of water storage section of thick bamboo, and the stopper is located the water injection hole from the bottom side of water injection hole, the side of stopper sets up for the one-way water injection hole; the installing support divide into upper frame, lower frame, the upper frame sets up the sliding tray, lower frame top sets up the protruding pole, protruding pole slides along the sliding tray, just set up the second spring in the sliding tray, the one end laminating of second spring is provided with the regulating plate, upper frame side is provided with opening structure and the foundation plate that supplies the regulating plate to adjust, through screw control its interval with the regulating plate on the foundation plate for when protruding pole and sliding tray sliding fit, increase or reduce the displacement distance of protruding pole.

2. The angle grinder of claim 1, wherein the wheel frame is provided with a plurality of mounting grooves, the width of the mounting grooves is larger than that of the guide wheel, the side end of the wheel frame is provided with an extension hole, the guide assembly further comprises an extension frame, and the side end of the extension frame is provided with a connector matched with the extension hole.

3. The angle grinder of claim 1, wherein an edge of the guide wheel is of a pointed cone configuration.

4. The angle grinder of claim 1, wherein the brushless motor comprises a permanent magnet rotor, a multipole winding stator and a position sensor, wherein two ends of the permanent magnet rotor in the casing are arranged through bearing installation, and the outer edge of the multipole winding stator is smeared with motor cooling grease and is closed through a closing cover.

5. The angle grinder of claim 1, wherein the bevel gear set includes a driving bevel gear installed at one side of the brushless motor, and a driven bevel gear engaged with the driving bevel gear, the driven bevel gear being rotated in synchronization with the saw blade through the output shaft.

6. The angle grinder of claim 5, wherein an automatic lubrication structure is arranged in the driving bevel gear, an external oil filling port is arranged on a casing where the driving bevel gear is located, a filling port is arranged at the side end of the driving bevel gear, the external oil filling port is used for inserting a filling pipe, and the tail end of the filling pipe extends to be inserted into the filling port.