WO2021088552A1 - 一种手持式工具及其罩体和操作方法 - Google Patents

一种手持式工具及其罩体和操作方法 Download PDF

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Publication number
WO2021088552A1
WO2021088552A1 PCT/CN2020/117047 CN2020117047W WO2021088552A1 WO 2021088552 A1 WO2021088552 A1 WO 2021088552A1 CN 2020117047 W CN2020117047 W CN 2020117047W WO 2021088552 A1 WO2021088552 A1 WO 2021088552A1
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WO
WIPO (PCT)
Prior art keywords
shield
state
accessory
cover
guide
Prior art date
Application number
PCT/CN2020/117047
Other languages
English (en)
French (fr)
Inventor
曾林
Original Assignee
苏州宝时得电动工具有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 苏州宝时得电动工具有限公司 filed Critical 苏州宝时得电动工具有限公司
Publication of WO2021088552A1 publication Critical patent/WO2021088552A1/zh

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
    • B24B23/02—Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor
    • B24B23/028—Angle tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
    • B24B23/02—Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B45/00—Means for securing grinding wheels on rotary arbors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B45/00—Means for securing grinding wheels on rotary arbors
    • B24B45/003—Accessories therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
    • B24B55/04—Protective covers for the grinding wheel
    • B24B55/05—Protective covers for the grinding wheel specially designed for portable grinding machines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
    • B24B55/04—Protective covers for the grinding wheel
    • B24B55/05—Protective covers for the grinding wheel specially designed for portable grinding machines
    • B24B55/052—Protective covers for the grinding wheel specially designed for portable grinding machines with rotating tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
    • B24B55/06—Dust extraction equipment on grinding or polishing machines
    • B24B55/10—Dust extraction equipment on grinding or polishing machines specially designed for portable grinding machines, e.g. hand-guided
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
    • B24B55/06—Dust extraction equipment on grinding or polishing machines
    • B24B55/10—Dust extraction equipment on grinding or polishing machines specially designed for portable grinding machines, e.g. hand-guided
    • B24B55/102—Dust extraction equipment on grinding or polishing machines specially designed for portable grinding machines, e.g. hand-guided with rotating tools

Definitions

  • the invention relates to the field of hand-held power tools, in particular to an angle grinder.
  • the angle grinder in the prior art has a main shaft driven and rotated by a motor, on which a tool head for performing different processing methods on a workpiece is detachably mounted on the main shaft.
  • a tool head for performing different processing methods on a workpiece is detachably mounted on the main shaft.
  • the tool head is usually covered with a cover body, but for different tool heads, the cover body will be different because different tool heads need to have different contact parts with the processed surface during work.
  • the cover of an angle grinder must not only suppress the scattering of dust and debris or the splash of metal particles, but also have a shape suitable for the processing operation, which can achieve high operation convenience and processing ability, and the tool head used for cutting (Saw blades or cutting blades) are different from the sanding tool heads for the cover body. Compared with the sanding tool heads, the saw blade or cutting blade tool heads need to be covered by the cover body.
  • each tool head in order to make each tool head have a cover body adapted to the working condition of the workpiece, when the operator switches from one working condition to another, the operator will follow the working condition of the working head.
  • Replacement in order to cooperate with the use of the working head, the original cover needs to be removed from the casing, and then a new cover needs to be installed. The operation of changing the head is more troublesome.
  • the problem to be solved by the present invention is to provide a hand-held tool with higher operating convenience.
  • a hand-held tool includes: a motor for providing driving force; a housing, including a head case, and a holding part arranged at an angle to the head case; a spindle, at least partly housed in the head case and controlled by The motor drives and rotates, and is used for mating tool heads; a shield is connected to the head shell and is used to cover at least part of the tool head; the shield includes a shield body and is movably connected with the shield body The shield accessory, the shield accessory is operable relative to the shield body to switch between a first state and a second state fixed with respect to the housing.
  • the shield accessory In the first state, the shield accessory is located The shield body is close to the side of the motor and overlaps the shield body; in the second state, the shield accessory is located on the side of the shield body away from the motor, and is enclosed with the shield body In the receiving cavity for receiving at least part of the tool head.
  • the hand-held tool further includes a connecting portion, and the shield accessory is inseparably connected to the shield body through the connecting portion.
  • the connecting portion is fixed to the shield main body, the connecting portion includes a guide, and the shield auxiliary member can move relative to the shield main body through the guide to switch between the first state and the second state.
  • the present invention has at least the following beneficial effects: by switching the shield accessory between the first state and the second state, the shield body can pass through the shield accessory when matching different tool heads.
  • the position of the shield body is switched to adapt to different tool heads, and the shield body does not need to be replaced; since the shield accessories are fixed to the shield body when they are in the first state and the second state, they do not need to be carried separately It is more convenient to carry; the auxiliary parts of the shield can be movably connected to the main body of the shield through the guide parts, that is, the auxiliary parts of the shield are never separated from the main body of the shield. Therefore, the auxiliary parts of the shield are not easy to be lost, and the shield The auxiliary part is switched between the first state and the second state through the guide part, and the switching process only needs to rotate and move along the guide part, and the operation is simple.
  • the guide includes a guide post
  • the shield accessory can rotate along the axial direction of the guide post so that the shield accessory can move along the axial direction of the guide post to be in the first state and the second state. Switch between the two states.
  • the connecting portion further includes an adapter piece fixed to the cover body at one end and connected to the guide post at the other end.
  • the shield accessory is provided with a notch, and when the shield accessory is in the first state At this time, the notch is mated with the adapter.
  • the tool head has a first side close to the motor and a second side away from the motor
  • the shield body includes a cover body capable of covering at least part of the first side, and a cover body extending from the cover body in a direction away from the motor. Covers at least part of the extension part of the tool head in the circumferential direction, and when in the second state, the shield accessory covers at least part of the second side.
  • a fixing part is provided on the cover body, and the fixing part is used to fix the auxiliary part of the cover to the main body of the cover in the first state or the second state.
  • the fixing member includes a first pawl fixed at one end to the extension portion and the other end extending toward the cover body.
  • the first pawl can hold the shield
  • the accessory is fixed to the main body of the shield.
  • the fixing member further includes a second claw that is fixed at one end to the extension part and the other end extends away from the cover body.
  • the second claw can hold the The shield accessory is fixed to the shield body.
  • the fixing member includes a buckle provided on one of the shield body and the shield accessory, and a buckle provided on the other of the two.
  • the The buckle is mated with the buckle to fix the shield accessory with respect to the shield main body.
  • the tool head includes a disk-shaped tool piece, and the area of the disk-shaped tool piece covered by the shield body is less than or equal to half of the area of the disk-shaped tool piece.
  • the present invention also provides an operating method of a hand-held tool, which is used in the above-mentioned hand-held tool.
  • the method includes the following steps : SS1 rotates the shield accessory from one of the first and second states around the guide so that the shield accessory avoids overlapping with the shield main body along the axial direction of the guide; SS2 moves the shield accessory along the guide to a preset position; SS3 rotates the shield accessory along the guide to another one of the first and second states.
  • the present invention also provides a cover for covering the tool head of a hand-held tool.
  • the cover includes a cover body, and the cover body includes a cover body and a cover body extending from the cover body and arranged at an angle to the cover body.
  • An extension part, and the cover body and the extension part form the inside of the cover body capable of accommodating at least part of the tool head;
  • a shield accessory which is movably connected to the shield body, and connected
  • the connecting portion is used to inseparably connect the shield accessory to the shield main body;
  • the connecting portion further includes a guide, and the shield auxiliary can be positioned at the first relative to the shield main body through the guide Switch between the first state and the second state; in the first state, the shield accessory is located on the side of the cover body away from the inner side of the cover body, and at least partially overlaps the cover body;
  • the shield accessory is mated with an end of the extension part facing away from the cover body, so that the shield body and the shield accessory form a receiving cavity capable of
  • the connecting portion is fixed to the shield body, the guide is cylindrical, and the shield accessory can rotate along the axis of the guide so that the shield accessory can move along the axial direction of the guide , Thereby switching between the first state and the second state.
  • the present invention also provides another hand-held tool, including: a motor for providing driving force; a housing, including a head shell, and a gripping portion arranged at an angle to the head shell; a spindle, at least partially contained in the housing
  • the head shell is driven to rotate by the motor and is used for mating tool heads;
  • a shield is connected to the head shell and is used to cover at least part of the tool head;
  • the tool head has a first side close to the motor and away from the motor
  • the second side of the shield the shield includes a shield body and a shield accessory movably connected with the shield body, the shield body includes a shield body covering at least a part of the first side, the shield
  • the cover accessory is operable to move relative to the tool head to switch between a first state and a second state.
  • the cover accessory In the first state, the cover accessory is located on the side of the first side of the tool head and is connected to the cover body.
  • the body is at least partially overlapped; in the second state, the shield accessory is located on the side of the second side of the tool head and covers at least part of the second side, and the shield accessory and the shield main body
  • the accommodating cavity for accommodating at least part of the tool head is formed by mating to isolate the grip part and the tool head.
  • the shield accessory is rotated around the guide post and moved axially along the guide post to realize the change of the state of the shield body, so that the shield accessory will not interfere with the tool head when the state is changed. Therefore, the shield The state switching of the auxiliary parts can be carried out in the state that the tool head is installed on the main shaft, or can be carried out in the state that the tool head is separated from the main shaft.
  • Fig. 1 is a schematic structural view of the shield accessory in the first state in the first embodiment of the present invention, and the whole machine omits part of the holding part shell;
  • FIG. 2 is a schematic structural diagram of the shield accessory and the tool head in the first embodiment of the present invention that are axially staggered and located at a first preset position, and the whole machine omits a part of the holding part shell;
  • FIG. 3 is a schematic structural diagram of the shield accessory in the first embodiment of the present invention, which is axially offset from the tool head and at a second preset position, and the whole machine omits part of the holding part shell;
  • FIG. 4 is a schematic structural diagram of the shield accessory in the second state in the first embodiment of the present invention, and the whole machine omits part of the holding part shell;
  • Figure 5 is a cross-sectional view of the angle grinder in Figure 1;
  • Fig. 6 is a schematic structural view of another angle of the angle grinder of Fig. 1.
  • FIG. 7 is a schematic structural diagram of the shield accessory in the first state in the second embodiment of the present invention, and a part of the holding part shell is omitted;
  • FIG. 8 is a schematic structural view of the second embodiment of the present invention in which the shield accessory and the tool head are axially staggered and located at the first preset position, and the whole machine omits part of the holding part shell;
  • FIG. 9 is a schematic structural view of the second embodiment in which the shield accessory and the tool head are axially staggered and located at the second preset position, and the whole machine omits part of the holding part shell;
  • FIG. 10 is a schematic structural view of the shield accessory in the second state in the second embodiment of the present invention.
  • Fig. 11 is a cross-sectional view of the angle grinder in Fig. 10.
  • the angle grinder 1 includes a housing, a motor 11 located in the housing, a spindle 12 driven by the motor, and a The tool head 13 is detachably installed on the main shaft 12.
  • the casing includes a main casing 101 and a handle portion 102 arranged at an angle to the main casing 101.
  • the main casing 101 houses the motor 11 and at least part of the main shaft 12, and the extension direction of the main casing 101 is the same as that of the main shaft 12.
  • the direction of extension is basically the same.
  • the motor 11 may also be arranged to be accommodated in the handle portion 102, that is, the extending direction of the handle portion 102 is substantially the same as the axis direction of the motor 11.
  • One end of the main shaft 12 close to the motor 11 is drivingly connected to the motor 11 and driven to rotate by the motor 11, and the other end of the main shaft 12 is connected to the tool head 13 to carry the tool head 13 to perform work.
  • the motor 11 includes a motor shaft 111.
  • the axis of the motor shaft 111 and the axis of the main shaft 12 are arranged at a certain angle according to actual work requirements.
  • the above-mentioned angle in this embodiment is a right angle, specifically, see FIG.
  • the main housing 101 extends in the Y direction, and the handle portion 102 extends in the X direction.
  • the angle grinder 1 is connected to an external power supply through the power cord 30 for power supply, such as an external AC power supply.
  • power supply such as an external AC power supply.
  • it can also be powered by a battery pack, which will not be repeated here.
  • the transmission mechanism includes a first bevel gear 191 fixed to one end of the motor shaft 111, and the first bevel gear 191 is located on the motor shaft 111 close to the main shaft. One end of 12, and rotates with the motor shaft 111.
  • the transmission mechanism further includes a second bevel gear 192 fixed to the main shaft 12 and close to one end of the motor 11 and meshing with the first bevel gear 191.
  • the first bevel gear 191 is driven by the motor 11 to rotate, and the second bevel gear 192 is driven to rotate through the meshing between the first bevel gear 191 and the second bevel gear 192, thereby converting the rotational output force on the motor shaft 111
  • the above-mentioned transmission structure may further include a reduction mechanism, and the reduction mechanism may be a planetary gear system, such as a two-stage planetary gear system or a three-stage planetary gear system.
  • the main housing 101 includes a gear box housing 1021 that is away from the tool head in the Y direction and accommodates at least part of the transmission mechanism, and is connected to the gear box housing 1021 and A spindle housing 1022 extending along the axis of the spindle 12 in the direction of the tool head.
  • the gearbox housing 1021 and the handle 102 and the main shaft housing 1022 are respectively connected by screws.
  • the main housing 101 can also be integrally formed or composed of two substantially symmetrical half housings, etc., which will not be repeated here.
  • the angle grinder 1 also includes a locking mechanism, which is used to lock the tool head 13 or the spindle 12 when the tool head 13 or the spindle 12 needs to be in a stationary state, such as replacing the working head.
  • the spindle 12 can be locked to prevent the operation of the tool head 13 from driving the rotation of the spindle 12 to affect the replacement of the working head, or to prevent the motor from driving the spindle 12 to rotate due to misoperation and injury to the operator during the replacement of the working head.
  • the locking mechanism can be arranged in multiple ways. In this embodiment, the locking mechanism locks the main shaft 12 and the tool head 13 by locking the second bevel gear 192.
  • the locking mechanism includes a stop shaft 171.
  • the stop shaft 171 is operable to move in a position to abut or separate from the second bevel gear 192.
  • the stop shaft 171 abuts against the second bevel gear 192, the second bevel gear 192 It cannot rotate in the direction of rotation; it is understandable that when the lock on the tool head 13 needs to be released, the stop shaft 171 exits the engagement with the second bevel gear 192, that is, separates from the second bevel gear 192 to release the second bevel gear. Locking of gear 192.
  • the above-mentioned locking mechanism also includes an operating button 173 (see FIG. 2) which is arranged on the gearbox housing 102 and connected to the stop shaft 171. By pressing the operating button 173, the stop shaft 171 can lock the second bevel gear 192. Or unlock, lock operation is simple, convenient and fast. It is understandable that the locking mechanism can also be arranged in other ways, such as locking the main shaft 12 and the tool head 13 by setting the stop shaft 171 to lock the first bevel gear.
  • the motor shaft 111 is rotatably supported inside the first housing 101 through the first support 19.
  • the first support 19 is a sleeve.
  • the first support 19 is also Bearings can be used.
  • a second support 109 is provided between the main shaft 12 and the gearbox housing 1021, and a second support 109 is provided between the main shaft 12 and the main shaft housing 1022.
  • Three supports 105 are provided.
  • the tool head 13 includes a pressure plate.
  • the pressure plate includes a first pressure plate 131 (see FIG. 1) and a second pressure plate 132 sleeved on the main shaft 12.
  • the tool head 13 also includes a pressure plate sleeved on the main shaft 12 and located at the first pressure plate.
  • the tool body 130 between the plate 131 and the second pressure plate 132.
  • the tool body 130 may be a disc-shaped grinding wheel or a disc-shaped cutting wheel, etc., to perform work such as grinding, grinding, or cutting as required.
  • at least part of the outer surface of the tool head 13 is covered with a cover 14.
  • the tool head 13 has an upper side facing the motor and a lower side facing away from the motor.
  • the cover 14 includes a cover body 141 and a cover accessory 142 mated with the cover body 141.
  • the cover body 141 includes a cover body 1410 covering at least a part of the first side surface.
  • the cover accessory 142 can It moves relative to the shield body 141 and covers at least part of the second side surface in at least one state.
  • the shield accessory 142 is operable to switch with respect to the shield body 141 between a first state and a second state fixed with respect to the housing. 1, when the shield accessory is in the first state, that is, the shield accessory 142 is located on the side of the first side of the tool head 13 and at least partially overlaps the cover body 1410.
  • the shield accessory 142 It is located on the side of the shield body 141 close to the motor 11 and overlaps the shield body, so that the shield accessory 142 can be fixed on the angle grinder when not in use, which occupies a small space and is convenient to carry; of course, in other implementations
  • the shield auxiliary member 142 may also be located between the shield body 1410 and the tool body 130.
  • the shield accessory when the shield accessory is in the second state, the shield accessory is located on the side of the shield body 141 away from the motor 11 and is enclosed with the shield body 141 for accommodating at least part of the tool bit
  • the accommodating cavity 106 that is, the shield accessory 142 is located on the side of the second side of the tool head and covers at least part of the second side, and the shield accessory 142 is formed by mating with the shield body 141
  • the receiving cavity 106 for receiving at least part of the tool head 13. 3 preferably, the shield auxiliary member 142 is substantially plate-shaped, and the shield main body 141 further includes the shield body 1410 extending toward the second side, that is, away from the motor 11 to form at least in the circumferential direction.
  • the extension 1411 of the tool head 13 is partially covered.
  • the shield auxiliary member 142 When the shield auxiliary member 142 is in the second state, the shield auxiliary member 142 is mated with the end of the extension portion 1411 away from the shield body 1410 so that the shield body 141 and the shield auxiliary member 142 form the receiving cavity 106.
  • the area of the shield accessory 142 is less than or equal to the area of the shield body 1410, so that the shield accessory 142 can form the required receiving cavity 106 with the shield body 141 without being bulky. The reason makes it interfere with other parts in the first state. Understandably, in other embodiments, the shield accessory 142 may also be provided with an extension.
  • the extension of the shield accessory 142 and the extension of the shield main body 141 are mated to form a cover part that covers the tool head in the circumferential direction.
  • the extension portion may be only provided on the shield auxiliary member 142.
  • the shield body 14 can have both a state that can adapt to the work of the grinding wheel and a state that can adapt to the work of the cutting wheel.
  • the shield is auxiliary
  • the cover 14 conforms to the use of the grinding wheel.
  • the side of the grinding wheel away from the motor 11 that is, the second side
  • the shield accessory 142 covers the second side of the tool head facing away from the motor 11.
  • the cover 14 separates the handle 102 and the tool head 13 by forming a receiving cavity 106.
  • 14 Not only can prevent the splash of metal particles generated during the work process from easily causing the operator to be injured, but also can effectively avoid the operator's hand touching the cutting disc when holding the handle 102, causing safety problems.
  • the cover 14 is more in line with the cutting wheel. use together.
  • the area covered by the cover 14 of the disc-shaped tool head 13 is less than or equal to half of the area of the disc-shaped tool head 13.
  • the angle grinder 1 further includes a connecting portion 15 fixed to the shield body 141, the shield accessory 142 is non-detachably connected to the shield body 141 through the connecting portion 15, and the connecting portion 15 includes a The guide 151 for guiding, the shield auxiliary 142 is switched between the first state and the second state with respect to the shield main body 141 through the guide 151.
  • the extension portion 1411 is further provided with a matching portion 1412 at the end far away from the cover body 1410.
  • the matching portion 1412 is used to better interact with the cover body 141 when the cover accessory 142 is in the second state.
  • the mating portion 1412 is a chamfered edge extending into the receiving cavity 106 by the extension portion.
  • the shield body 141 is further provided with a snap ring 1413, and the shield body 141 is detachably installed on the spindle housing 103 outside the spindle through the snap ring 1411, which is used when the shield body 141 is damaged or because of other When the shield body needs to be replaced, the shield body 141 can be detached from the spindle housing 103.
  • the shield auxiliary member 142 is movably disposed on the shield main body 141, specifically, the shield auxiliary member 142 is movably fixed to the shield main body 141, and the shield auxiliary member 142 is located in the first place through movement. Switch between state and second state.
  • the fixing method between the shield auxiliary member 142 and the shield main body 141 will be described in detail below with reference to the accompanying drawings.
  • the outer side of the shield body 141 away from the tool head 13 or the outer side of the accommodating cavity 106 is provided with the above-mentioned guide 151
  • the guide 151 is a guide column
  • the shield accessory 142 is movable through the guide column Is fixed to the shield body 141, and the shield accessory 142 is switched between the first state and the second state by rotating around the guide post and moving along the axis of the guide post.
  • the axis of the guide column is parallel to the axis of the main shaft 12.
  • the connecting portion further includes an adapter 152 with one end fixed to the cover body 1410 and the other end connected to the guide post.
  • the shield accessory is provided with a slot 1423. When the shield accessory 142 is in the first position In a state, the slot 1423 is mated with the adapter 152, so that the shield auxiliary member 142 is better fixed to the shield main body 141 in the first state.
  • the connecting portion also includes a connecting piece connected between one end of the guide post away from the adapter 152 and the cover body, so that the other end of the guide post (that is, the end away from the adapter 152) can also be fixed to the cover body 141.
  • the shield body 14 is provided with a device for positioning the shield auxiliary member 142 in the second state.
  • the fixing member includes a first claw 1611 that is fixed at one end to the extension part 1411 and the other end extends toward the cover body 1410.
  • the first claw 1611 can fix the shield accessory 142 to the shield body 141.
  • the fixing member also includes a second claw 1612 that is fixed at one end to the extension 1411 and the other end extends away from the cover body 1410.
  • the fixing member further includes a card protrusion 181 provided on the extension portion 1411, and a card slot provided on the shield auxiliary member 142 for cooperating with the card protrusion 181 when the shield auxiliary member 142 is in the second state 182.
  • the card slot 182 can also be provided in the extension portion 1411, and the card protrusion 181 can be provided in the shield accessory 142.
  • the switching of the shield accessory 142 in this embodiment between the first state and the second state will be described in detail below with reference to the accompanying drawings.
  • the shield auxiliary member 142 is switched from the first state shown in FIG. 1 to the second state shown in FIG. 4, first, the shield auxiliary member 142 is rotated along the guide 151 until it is in the main shaft with the shield body 141 The axial direction of 12 is staggered.
  • the shield accessory 142 in Figure 1 can be rotated clockwise to the state shown in Figure 2, that is, the shield accessory 142 is shown along the arrow f in Figure 1 Rotate in the direction of, so that the shield accessory 142 can move axially along the guide 151; then, the rotated shield accessory 142 (that is, the state shown in FIG. 2) is moved away from the motor 11 along the main shaft 15 Move to the corresponding axial preset position of the shield accessory 142 in the second state, hereinafter referred to as the first preset position, specifically, that is, the shield accessory 142 in FIG. 2 is along the axis of the guide 151 Move to the position shown in FIG.
  • the shield accessory 142 rotates in a counterclockwise direction and form a receiving cavity 106 with the shield body 141.
  • the shield accessory 142 in the state shown in FIG. 3 is rotated in the direction of arrow n to form a receiving cavity 106 with the shield body 141.
  • the shield auxiliary member 142 in the second state is rotated so that the shield auxiliary member 142 is in contact with the main body of the shield body in the axial direction of the main shaft 12 141 or the tool head is staggered.
  • the shield accessory 142 shown in FIG. 4 can be rotated counterclockwise along the main axis to the state shown in FIG. 3, that is, the shield accessory 142 in the second state in FIG.
  • the reverse rotation of the arrow n in FIG. 3 forms the state shown in FIG. 3; then, the shield auxiliary member 142 is moved along the guide 151 toward the direction of the shield main body 1410 until the shield auxiliary member 142 is in the first state.
  • the axial preset position (hereinafter referred to as the second preset position), that is, the shield accessory 142 in the state shown in FIG. 3 moves in the reverse direction of the arrow M shown in FIG. 2 to the state shown in FIG. 2 (the shield auxiliary Is in the second preset position); finally, the shield accessory 142 in the second preset position is continued to rotate to the first state.
  • the shield accessory 242 shown in FIG. 2 can be moved along the line in FIG. 1
  • the reverse rotation of the arrow f reaches the state shown in FIG. 1.
  • SS1 moves the shield accessory 142 from one of the first and second states
  • the state rotates around the guide 151 so that the shield accessory 142 avoids overlapping with the shield main body 141 along the axial direction of the guide 151
  • SS2 moves the shield accessory 142 along the guide 151 Move to a preset position
  • SS3 rotates the shield accessory 142 along the guide 151 to the other one of the first and second states.
  • the shield auxiliary member 142 is inseparably connected with the shield main body 141 through the connecting portion 15, and the shield auxiliary member 142 is switched between the first state and the second state relative to the shield main body 141 to make the shield
  • the body 14 is suitable for the use of a variety of tool heads, so that the same cover body can not only be used for multiple purposes, but also is not easy to lose when the cover body undergoes state conversion.
  • the non-detachable connection mentioned in the present invention refers to the fact that the shield auxiliary member 142 does not need to be disconnected from the shield main body 141 when the state of the shield auxiliary member 142 is changed relative to the shield main body 141 The state transition can be realized instead of being inseparable between the two.
  • connection between the two can be detachable or non-detachable, as long as the shield accessory 142 is relative to the shield.
  • the cover main body 141 performs state transition, the two are in a connected state and the state transition can be realized.
  • the shield accessory 142 is rotated around the guide post and moved axially along the guide post to realize the change of the state of the shield body 14, so that the shield accessory 142 will not interfere with the tool head when the state is changed. Therefore, the state switching of the shield accessory 142 may be performed in a state where the tool head is mounted on the main shaft 12, or may be performed in a state where the tool head is separated from the main shaft 12.
  • Figures 7-11 are schematic diagrams of the second preferred embodiment of the present invention.
  • the angle grinder 2 includes a housing, a motor 21 located inside the housing, a main shaft 22, and a tool head 23.
  • the end of the main shaft 22 close to the motor 21 is connected to the motor 21 in transmission and is driven to rotate by the motor 21.
  • the other end of 22 is connected with the tool head 23 and carries the tool head 23 to perform work.
  • the casing 20 includes a main casing 201 and a handle portion 202 arranged at an angle to the main casing.
  • the motor 21 includes a motor shaft 211.
  • the axis of the motor shaft 211 and the axis of the main shaft 22 form a certain included angle according to actual work requirements. Specifically, the included angle may be a right angle.
  • the end of the main shaft 22 close to the motor 21 is connected to the motor 21 through a transmission structure.
  • the transmission structure includes a gear box.
  • the gear box includes a first bevel gear 291 fixed to one end of the output shaft 211, and the first bevel gear 291 is located on the output shaft 211. It is close to one end of the main shaft 22 and rotates with the output shaft 211.
  • the gear box also includes a second bevel gear 292 fixed to an end of the main shaft 22 close to the motor 21.
  • the first bevel gear 291 is driven by the motor 21 to rotate, and the meshing between the first bevel gear 291 and the second bevel gear 292 drives the second bevel gear 292 to rotate, thereby converting the rotational output force on the output shaft 211 A rotational force around the main shaft 22 is formed.
  • the transmission structure may also include a reduction mechanism, such as a two-stage planetary gear or a three-stage planetary gear.
  • the housing includes a gear box housing 202 located outside the gear box, and a spindle housing 2022 sleeved outside the main shaft 22 and located between the gear box housing 2021 and the tool head 23.
  • the gearbox housing 202 is fixedly connected to the motor housing 201 and the spindle housing 203 respectively.
  • the gearbox housing 202 and the motor housing 201, and the gearbox housing 2021 and the spindle housing 2022 are connected by bolts.
  • one end of the gearbox housing 202 is connected to the handle portion.
  • the end of 202 near the first bevel gear 291 is butted, and then the two are fixedly connected by fixing bolts; the other end of the gearbox housing 202 is butted with the end of the main shaft housing 2022 near the motor 21, and then the gearbox housing is connected by fixing bolts.
  • the body 2021 and the spindle housing 2022 are connected.
  • the connection between the handle 202, the gearbox housing 2021, and the main shaft housing 2022 can also be connected in other ways, which will not be repeated here.
  • the angle grinder 2 further includes a locking member.
  • the locking member is used to lock the tool head 23 and the spindle 22 when the tool head 23 needs to be in a stationary state. Specifically, the locking member is locked by The tool head 23 and the spindle 22 are locked by the second bevel gear 292 method.
  • the locking member includes a stop shaft 271, which operably extends into the gear box and abuts against the second bevel gear 292 to prevent the second bevel gear 292 from rotating; it is understandable that when the tool head 23 needs to be released When locked, the stop shaft 271 exits the second bevel gear 292 to unlock the second bevel gear 292.
  • the above-mentioned gearbox housing 202 is provided with an operating button 273 connected to the stop shaft 271 (see FIG. 8). By pressing the operating button 273, the second bevel gear 292 can be locked or unlocked by the stop shaft 271. The operation is simple and fast.
  • the motor output shaft 211 is rotatably fixed inside the motor housing 201 through the first shaft sleeve 29, where the first shaft sleeve 29 can also be replaced by a first bearing.
  • the main shaft 22 is rotatably fixed in the main shaft housing 203 via the second bearing 205. It is understandable that since the end of the main shaft 22 close to the motor 21 is fixed to the second bevel gear 292 and is located inside the gear box housing 202, in order to make the main shaft 22 better rotate relative to the gear box housing 202, the main shaft 22 is close to the motor 21. One end of 21 can make the main shaft 22 rotate relative to the gearbox housing 202 through the third sleeve 209 or the third bearing.
  • the tool head 23 includes a pressure plate, the pressure plate includes a first pressure plate 231 and a second pressure plate 232 sleeved on the main shaft 22, the tool head 23 also includes sleeves on the main shaft 22 and located in the first A tool body 230 between a pressure plate 231 and a second pressure plate 232.
  • the tool body 230 may be a grinding wheel or a cutting wheel, etc., to perform work such as grinding, grinding, or cutting as required.
  • the outer surface of the tool head 23 is covered with a cover 24.
  • the tool head 23 has a first side surface 23a close to the motor (see FIG.
  • the tool body 230 is a disc-shaped tool body sandwiched between the first pressure plate 231 and the second pressure plate 232.
  • the cover body 24 covers at least a part of the first side surface 23 a; the cover body 24 includes a cover body 241, which is fixed to the housing and extends in the circumferential direction of the main shaft 22.
  • the shield body 241 is fixed to the spindle housing 203.
  • the shield body 241 includes a shield body 2410 covering at least a part of the first side surface, and an extension part 2411 extending from the shield body 2410 in a direction away from the motor 11 and covering at least part of the tool bit in the circumferential direction.
  • the shield body 24 further includes a shield auxiliary member 242, which is movably connected to the shield main body 241, and the shield auxiliary member 242 is operable to switch between a first state and a second state.
  • the guard body body 2410 is circumferential relative to the spindle 22
  • the angle covering the above-mentioned first side surface 13a is ⁇ '(the angle formed by the covered area of the tool body in the circumferential direction with respect to the main axis), 160° ⁇ ′ ⁇ 180°.
  • the two sides of the shield body 2410 relative to the circumferential direction of the main shaft are represented by CC and DD respectively, and the angle ⁇ 'is the angle formed by the CC side and the DD side in FIG. 10.
  • the angle grinder 2 further includes a connecting portion 25 through which the shield auxiliary member 242 is inseparably connected to the shield main body 241.
  • the connecting portion 25 is fixed to the shield main body 141, and the connecting portion 25 includes a guide 251 through which the shield auxiliary member 242 can move relative to the shield main body 241 to switch between the first state and the second state.
  • the guide 251 is a guide post
  • the shield accessory 242 is movably fixed to the shield main body 241 through the guide post
  • the shield accessory 142 rotates around the guide post and moves along the guide post.
  • the first state and the second state are switched in the manner of the axial movement of the guide post.
  • the axis of the guide column is parallel to the axis of the main shaft 12.
  • the connecting portion further includes an adapter 252 with one end fixed to the cover body 2410 and the other end connected to the guide post.
  • the shield accessory is provided with a slot 2423. When the shield accessory 242 is in the first position In the first state, the slot 2423 is mated with the adapter 252, so that the shield auxiliary member 142 is better fixed to the shield main body 141 in the first state.
  • the shield accessory 242 when the shield accessory 242 is in the first state, the shield accessory 242 is fixed to the shield body 241 and is located on the side of the shield body 2410 away from the tool head 23, that is, in the gear box housing 202 described above. And the main body 2410 of the shield.
  • the shield accessory 242 is provided with a slot 2420.
  • the main shaft 22 and the housing 203 outside the main shaft are at least partially located in the slot 2420.
  • the shield accessory 242 when the shield accessory 242 is in the second state, the shield accessory 242 is fixed to the shield main body 241 and together with the shield main body forms a receiving cavity 206 for accommodating at least a part of the tool head 23.
  • the shield The auxiliary member 242 covers at least a part of the second side surface 23b.
  • the area of the shield accessory 242 is less than or equal to the area of the shield main body 2410, so that when the shield accessory 242 is in the second state, it can form the required receiving cavity 206 with the shield main body 241, and It will not interfere with other parts due to the large volume.
  • the shield auxiliary member 242 is a plate-shaped cover body.
  • the shield auxiliary member 242 When the shield auxiliary member 242 is in the first state, the shield auxiliary member 242 is stacked on a side of the shield main body 1410 away from the receiving cavity 206.
  • the notch 2420 corresponds to the projection position of the pressure plate in the accommodating cavity 206 on the shield accessory 242.
  • the angle grinder can be effectively improved by setting the notch 2420 on the shield accessory 242 The convenience of machine work reduces the hindrance or interference to the processing process caused by the existence of objects around the workpiece.
  • the shield body 241 is further provided with a snap ring 2413, and the shield body 241 is detachably installed on the spindle housing 203 outside the spindle 22 through the snap ring 2413, which is used when the shield body 241 is damaged or When the shield body 241 is replaced due to other requirements, the shield body 241 can be detached from the spindle housing 203.
  • the shield auxiliary member 242 is movably disposed on the shield main body 241, specifically, the shield auxiliary member 142 is movably fixed to the shield main body 241, and the shield auxiliary member 242 is relatively
  • the cover main body 241 moves to switch between the first state and the second state.
  • the cover body 24 is provided with a fixing member for positioning the cover auxiliary member 242 in the first state or the second state.
  • the fixing member includes one end fixed to the extension part 2411 and the other end facing the cover body 2410.
  • the extended first pawl 2611 can fix the shield auxiliary component 242 to the shield main body 241 when the shield accessory 242 is in the first state.
  • the fixing member further includes a second claw (not shown in the figure) that is fixed at one end to the extension part 2411 and the other end extends away from the cover body 2410.
  • the second claw can fix the shield accessory 242 to the shield body 241.
  • the number and positions of the claws can be set according to specific needs.
  • the above-described structure of this embodiment is basically the same as the structure in the first real-time example.
  • the main difference between this embodiment and the above-mentioned first embodiment is that the position of the guide post in this embodiment and the shield accessory 242 are relative to each other.
  • the shield auxiliary member 242 is switched from the first state shown in FIG. 7 to the second state shown in FIG. 10, first, the shield auxiliary member 242 is rotated along the guide 251 until it is in contact with the shield body 241 on the main shaft.
  • the axial direction of 22 is staggered.
  • the shield accessory 242 in FIG. 7 can be rotated in the direction shown by the arrow f to the state shown in FIG. 8 so that the shield accessory 242 can move along the guide member 25.
  • the rotated shield accessory 242 is moved away from the motor 21 along the guide 251 to the axial preset position of the shield accessory 242 in the second state, hereinafter referred to as the first preset
  • the shield accessory 242 can be moved from the state shown in FIG. 8 to the position shown in FIG. 9 along the axis of the guide 25 according to the arrow M′; when the shield accessory 242 moves to the first position along the main shaft 25 After the preset position, finally, the shield accessory 242 is rotated and forms a receiving cavity 206 with the shield main body 241.
  • the shield accessory shown in FIG. 9 is shown in accordance with the arrow n′ shown in FIG.
  • the shield accessory 242 can continue to rotate in the direction opposite to the direction indicated by the arrow n′ to the state shown in FIG. Receiving cavity 206.
  • the shield auxiliary member 242 When the shield auxiliary member 242 is switched from the second state shown in FIG. 10 to the first state shown in FIG. 7, the shield auxiliary member 242 in the second state shown in FIG.
  • the shield accessory 242 is staggered in the axial direction of the main shaft 22.
  • the shield accessory 242 shown in FIG. 10 can be rotated in the reverse direction of the arrow n'shown in FIG. 9 to the state shown in FIG. 9;
  • the shield accessory 242 moves along the guide 251 toward the direction of the shield main body 2410 to the axial preset position of the shield accessory 242 in the first state (hereinafter referred to as the second preset position).
  • the shield accessory 242 shown in FIG. 9 moves in the reverse direction of the arrow M′ in FIG.
  • the shield accessory 242 in the second preset position is continuously rotated to the first state, specifically ,
  • the shield accessory 242 shown in FIG. 8 can be reversed from the arrow f in FIG. 7 to the state shown in FIG. 7.
  • the shield accessory is movably connected to the shield body through the connecting portion. It is understandable that the shield accessory is located between the first state and the second state. Switching mode, the shield accessory can also be connected to the shield body in a detachable (detachable) manner, that is, the above-mentioned connecting portion is not provided between the shield accessory 242 and the shield body 241 to connect the two . For the fixing of the shield accessory in the first state or the second state, it can be fixed by the above-mentioned fixing member, which will not be repeated here.

Abstract

一种手持式工具，包括马达（11）、主轴（12）以及罩体（14），罩体包括护罩主体（141）以及护罩辅件（142），护罩辅件可操作地相对于护罩主体在相对壳体固定的第一状态与第二状态之间转换，第一状态时，护罩辅件位于护罩主体靠近马达的一侧且与护罩主体交叠；第二状态时，护罩辅件位于护罩主体远离马达的一侧且与护罩主体形成可收容工具头的收容腔（106）；其中，护罩辅件与护罩主体不可拆卸地连接，并能够相对于导向柱旋转和轴向移动以在第一、第二状态间切换。手持式工具的同一罩体能够适应多种工具头，罩体在进行状态转换时操作方便，也不易丢失。还提供了一种手持式工具的操作方法、一种手持式工具的罩体以及另一种手持式工具。

Description

一种手持式工具及其罩体和操作方法
本申请要求了申请日为2019年11月8日，申请号为201911088945.2的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及手持式动力工具领域，尤其涉及一种角磨机。
背景技术
现有技术中的角磨机，具有通过马达驱动旋转的主轴，在所述主轴上，以可拆卸的方式安装有对工件进行不同加工方式的工具头。当被加工的工件表面需要研磨时，能够换上磨盘类工具头对被加工的工件进行研磨或磨削；当被加工的工件需要切割时，还可以换上切割类工具头以对被加工工件进行切割等加工方式。
为了防止工具头工作时产生的粉尘、碎屑的飞散，尤其当工件为金属时，工作过程中产生的金属颗粒的飞溅容易造成操作者受伤。因此，对工具头，通常覆盖有罩体，但针对不同的工具头，因不同工具头在工作时需要与被加工面的接触部分不同，因而罩体会不同。如角磨机的罩体不仅要抑制粉尘、碎屑的飞散或金属颗粒的飞溅，还要适于加工作业的形状，能够实现较高的作业便利性以及加工能力，而用于切割的工具头(如锯片或切割片)则与打磨工具头对罩体的需求不同，相比较打磨类工具头，锯片或切割片类的工具头需要被罩体覆盖的要求更高。
因此，在现有技术中，为了使每种工具头工作时都有与工件的工况适应的罩体，操作者在由一种工况切换到另一种工况时，随着工作头的更换，为了配 合工作头的使用，需要从机壳上拆下原来的罩体，再安装上新的罩体，换头操作比较麻烦。
发明内容
为克服现有技术的缺陷，本发明所要解决的问题是：提供一种具有较高作业便利性的手持式工具。
一种手持式工具，包括：马达，用于提供驱动力；壳体，包括头壳、以及与所述头壳呈角度设置的握持部；主轴，至少部分收容于所述头壳且由所述马达驱动旋转，用于配接工具头；护罩，连接于所述头壳，用于覆盖至少部分所述工具头；所述护罩包括护罩主体、以及与所述护罩主体活动连接的护罩辅件，所述护罩辅件可操作地相对于护罩主体在相对于壳体固定的第一状态与第二状态之间转换，第一状态时，所述护罩辅件位于护罩主体靠近马达的一侧且与所述护罩主体交叠；第二状态时，所述护罩辅件位于护罩主体远离马达的一侧、且与所述护罩主体共同围成用于收容至少部分工具头的收容腔。
优选地，所述手持式工具还包括连接部，所述护罩辅件通过连接部与护罩主体不可分离地连接。
优选地，所述连接部固定于护罩主体，所述连接部包括导向件，所述护罩辅件能够通过导向件相对于护罩主体运动以在第一状态和第二状态之间切换。
与现有技术相比，本发明至少具有如下有益效果：通过将护罩辅件位于第一状态和第二状态之间切换，使罩体在配合不同的工具头时，可通过护罩辅件与护罩主体之间的位置切换来适应不同的工具头，不需要重新更换罩体；由于护罩辅件在位于第一状态以及第二状态时均与护罩主体固定，携带时不需要单独携带，携带比较方便；将护罩辅件通过导向件与护罩主体可活动连接，也即护罩辅件始终不会与护罩主体分开，因此，护罩辅件不容易丢失，且护罩辅件通 过导向件进行第一状态和第二状态之间的切换，切换过程只需沿着导向件转动以及移动，操作简单。
优选地，所述导向件包括导向柱，所述护罩辅件能够沿所述导向柱的轴向进行旋转以使护罩辅件能够沿导向柱的轴向运动，以在第一状态和第二状态之间切换。
优选地，所述连接部还包括一端固定于罩体本体，另一端与导向柱连接的配接件，所述护罩辅件上设置有缺槽，当所述护罩辅件处于第一状态时，所述缺槽与所述配接件配接。
优选地，所述工具头具有靠近马达的第一侧以及背离马达的第二侧，所述护罩主体包括能够覆盖至少部分第一侧的罩体本体以及由罩体本体向背离马达方向延伸以沿周向覆盖至少部分工具头的延伸部，当处于第二状态时，所述护罩辅件覆盖至少部分所述第二侧。
优选地，所述罩体上设有固定件，所述固定件用于将所述护罩辅件在第一状态或第二状态固定于所述护罩主体。
优选地，所述固定件包括一端固定于延伸部，另一端向罩体本体延伸的第一卡爪，当护罩辅件处于第一状态时，所述第一卡爪能够将所述护罩辅件固定于所述护罩主体。
优选地，所述固定件还包括一端固定于延伸部，另一端朝背离罩体本体延伸的第二卡爪，当护罩辅件处于第二状态时，所述第二卡爪能够将所述护罩辅件固定于所述护罩主体。
优选地，所述固定件包括设置于护罩主体和护罩辅件二者之一的卡凸，设置于二者之另一的卡扣，当护罩辅件处于第二状态时，所述卡扣与所述卡凸配接以使所述护罩辅件相对于所述护罩主体固定。
优选地，所述工具头包括盘状工具片，所述盘状工具片被所述护罩主体所覆盖的面积小于等于盘状工具片面积的一半。
本发明还提供了一种手持式工具的操作方法，用于上述的手持式工具，所述护罩辅件由第一、第二状态中之一的状态旋转至另一状态时，包括如下步骤：SS1将所述护罩辅件由第一、第二状态中之一的状态绕所述导向件旋转以使所述护罩辅件避开与护罩主体沿导向件轴向上的重叠；SS2将所述护罩辅件沿所述导向件进行移动至预设位置；SS3将所述护罩辅件沿导向件旋转至第一、第二状态中的另一状态。
本发明还提供了一种罩体，用于遮覆手持式工具的工具头，包括护罩主体，所述护罩主体包括罩体本体以及由罩体本体延伸且与罩体本体呈角度设置的延伸部，且所述罩体本体和所述延伸部形成能够收容至少部分工具头的罩体内侧；护罩辅件，所述护罩辅件可活动地与所述护罩主体连接，以及连接部，所述连接部用于将护罩辅件不可分离地与所述护罩主体连接；所述连接部还包括导向件，所述护罩辅件能够通过导向件相对于护罩主体在第一状态和第二状态之间切换；第一状态时，所述护罩辅件位于所述罩体本体背离所述罩体内侧的一侧，且与所述罩体本体至少部分重叠；第二状态时，所述护罩辅件与所述延伸部背离罩体本体的一端配接，从而所述护罩主体以及所述护罩辅件形成能够收容至少部分所述工具头的收容腔。
优选地，所述连接部固定于护罩主体，所述导向件呈柱状，所述护罩辅件能够沿所述导向件轴线进行旋转以使护罩辅件能够沿导向件的轴向进行运动，从而在第一状态和第二状态之间切换。
本发明还提供了另一种手持式工具，包括：马达，用于提供驱动力；壳体，包括头壳、以及与所述头壳呈角度设置的握持部；主轴，至少部分收容于所述 头壳且由所述马达驱动旋转，用于配接工具头；护罩，连接于所述头壳，用于覆盖至少部分工具头；所述工具头具有靠近马达的第一侧以及背离马达的第二侧，所述护罩包括护罩主体以及与所述护罩主体活动连接的护罩辅件，所述护罩主体包括覆盖至少部分所述第一侧的罩体本体，所述护罩辅件可操作地相对于工具头运动以在第一状态和第二状态之间转换，第一状态时，所述护罩辅件位于所述工具头的第一侧所在侧并与罩体本体至少部分重叠；第二状态时，所述护罩辅件位于所述工具头的第二侧所在侧并覆盖至少部分所述第二侧，且所述护罩辅件与所述护罩主体配接形成收容至少部分所述工具头的收容腔以隔离握持部和工具头。
本实施例通过将护罩辅件绕导向柱旋转以及沿导向柱进行轴向移动以实现罩体的状态的改变，使得护罩辅件在状态转换时不会与工具头干涉，因此，护罩辅件的状态切换可以在工具头安装于主轴上的状态下进行，也可以在工具头与主轴分离的状态下进行。
附图说明
以上所述的本发明的目的、技术方案以及有益效果可以通过下面附图实现：
图1是本发明的第一实施例中护罩辅件位于第一状态的结构示意图，且整机省略了部分握持部壳体；
图2是本发明的第一实施例中护罩辅件与工具头轴向错开且位于第一预设位置的结构示意图，且整机省略了部分握持部壳体；
图3是本发明的第一实施例中护罩辅件位于与工具头轴向错开且位于第二预设位置的结构示意图，且整机省略了部分握持部壳体；
图4是本发明的第一实施例中护罩辅件位于第二状态的结构示意图，且整机省略了部分握持部壳体；
图5是图1中角磨机的剖视图；
图6是图1角磨机的另一角度的结构示意图。
图7是本发明的第二实施例中护罩辅件位于第一状态的结构示意图，且省略了部分握持部壳体；
图8是本发明的第二实施例中护罩辅件与工具头轴向错开且位于第一预设位置的结构示意图，且整机省略了部分握持部壳体；
图9是图第二实施例中护罩辅件与工具头轴向错开且位于第二预设位置的结构示意图，且整机省略了部分握持部壳体；
图10是本发明的第二实施例中护罩辅件位于第二状态的结构示意图；
图11是图10中角磨机的剖视图。
具体实施方式
下面结合附图对本发明的较佳实施例进行详细阐述，以使本发明的优点和特征能更易于被本领域技术人员理解，从而对本发明的保护范围做出更为清楚明确的界定。
第一实施例
参见图1和图5，一种手持式工具，本实施例具体以角磨机1为例进行说明，角磨机1包括壳体、位于壳体内的马达11、由马达驱动的主轴12以及可拆卸地安装于主轴12的工具头13。壳体包括主壳体101以及与主壳体101呈角度设置的手柄部102，本实施例中，主壳体101收容马达11以及至少部分主轴12，且主壳体101的延伸方向与主轴12的延伸方向基本相同。当然，可以理解地，在其它实施例中，马达11也可以设置成收容于手柄部102，也即手柄部102的延伸方向与马达11的轴线方向基本相同。主轴12靠近马达11的一端与马达11传动连接且由马达11驱动旋转，主轴12的另一端与工具头13连接以带工具头13执行工作。马达11包括马达轴111，马达轴111的轴线和主轴12的轴线根据实际工作需要，二者之间形成一定的角度设置，优选地，本实施例中上述角度 为直角，具体地，参见图5所示的坐标，其中，主壳体101沿Y方向延伸，手柄部102沿X方向延伸。另外，本实施例中，角磨机1通过电源线30与外部电源进行连接供电，如外接交流电源供电。当然在其它实施例中其也可以通过电池包进行供电，此处不再赘述。
参见图5，主轴12靠近马达11的一端通过传动机构与马达11连接，具体地，传动机构包括固定于马达轴111一端的第一锥齿轮191，且第一锥齿轮191位于马达轴111靠近主轴12的一端，并随马达轴111一起转动。传动机构还包括固定于主轴12且靠近马达11一端且与第一锥齿轮191啮合的第二锥齿轮192。第一锥齿轮191在马达11的带动下旋转，并通过第一锥齿轮191与第二锥齿轮192之间的啮合作用带动第二锥齿轮192旋转，进而将马达轴111上的旋转输出力转换成绕着主轴12的旋转力，上述传动结构还可以进一步包括减速机构，所述减速机构可以为行星齿轮系，如二级行星齿轮系或三级行星齿轮系等。
继续参见图1和图5，优选地，本实施例中，主壳体101包括在Y方向上远离工具头一端且收容至少部分传动机构的齿轮箱壳体1021，与齿轮箱壳体1021对接且沿主轴12轴线向工具头方向延伸的主轴壳体1022。齿轮箱壳体1021与手柄部102和主轴壳体1022之间分别通过螺钉连接。当然，可以理解地，主壳体101还可以一体成型或由两个基本对称的half壳体组成等，此处不再赘述。
继续参见图5，本实施例中，角磨机1还包括锁定机构，锁定机构用于当工具头13或主轴12需要处于静止状态时对工具头13或主轴12进行锁定，如更换工作头作头时，通过对主轴12的锁定可防止对工具头13的操作带动主轴12转动影响对工作头的更换或在更换工作头时避免因误操作造成马达带动主轴12转动造成对操作者的伤害。锁定机构的设置方式可以有多种方式，本实施例中，锁定机构通过锁定第二锥齿轮192方式进行锁定主轴12以及工具头13。锁定机 构包括止挡轴171，止挡轴171可操作地在与第二锥齿轮192抵接或分离的位置运动，当止挡轴171与第二锥齿轮192抵接时，第二锥齿轮192在旋转方向无法转动；可以理解地，当需要解除对工具头13的锁定时，止挡轴171退出与第二锥齿轮192的啮合，也即与第二锥齿轮192分离以解除对第二锥齿轮192的锁定。上述锁定机构还包括设置于齿轮箱壳体102上并与止挡轴171连接的操作钮173(见图2)，通过按压操作钮173即可实现止挡轴171对第二锥齿轮192的锁定或解锁，锁定操作简单、方便、快捷。可以理解地，对于锁定机构的设置还可以为其他方式，如通过将止挡轴171设置成锁定第一锥齿轮的方式来达到对主轴12以及工具头13的锁定等。
继续参见图5，马达轴111通过第一支撑件19可转动的支撑于第一壳体101内部，优选地，第一支撑件19为轴套，当然，可以理解地，第一支撑件19还可以采用轴承。可以理解地，为了使主轴12更好地支撑于第二壳体102内部，主轴12和齿轮箱壳体1021之间设置有第二支撑件109，主轴12和主轴壳体1022之间设置有第三支撑件105。
工具头13包括压盘，压盘包括套设于主轴12上的第一压盘131(见图1)以及第二压盘132，工具头13还包括套设于主轴12上且位于第一压盘131和第二压盘132之间的工具本体130。具体的，工具本体130可以为盘状的磨削砂轮或盘状的切割砂轮等，用以根据需要进行打磨、磨削或切割等工作。为防止打磨、磨削或切割过程中产生的粉尘、颗粒等危害操作者或对环境产生影响，工具头13的至少部分外表面覆盖有罩体14。工具头13具有面向马达的上侧面、背离马达的下侧面。参见图3，罩体14包括护罩主体141以及与护罩主体141配接的护罩辅件142，护罩主体141包括覆盖至少部分第一侧面的罩体本体1410，护罩辅件142能够相对于护罩主体141运动并在至少一种状态中覆盖至 少部分第二侧面。护罩辅件142可操作地相对于护罩主体141在相对于壳体固定的第一状态与第二状态之间转换。参见图1，当护罩辅件位于第一状态时，也即护罩辅件142位于工具头13的第一侧所在侧并与罩体本体1410至少部分重叠，优选地，护罩辅件142位于护罩主体141靠近马达11的一侧且与所述护罩主体交叠，以使护罩辅件142在不使用时可以固定在角磨机上，占用空间小，携带方便；当然在其它实施例中，当护罩辅件142位于第一状态时，护罩辅件142还可以位于罩体本体1410与工具本体130之间。参见图4，当护罩辅件位于第二状态时，所述护罩辅件位于护罩主体141远离马达11的一侧且与所述护罩主体141共同围成用于收容至少部分工具头的收容腔106，也即所述护罩辅件142位于工具头的第二侧所在侧并覆盖至少部分所述第二侧且所述护罩辅件142与所述护罩主体141配接形成收容至少部分所述工具头13的收容腔106。参见图3，优选地，所述护罩辅件142大致呈板状，护罩主体141还包括由罩体本体1410向第二侧，也即向远离马达11方向延伸以形成沿圆周方向上至少部分覆盖工具头13的延伸部1411。当护罩辅件142位于第二状态时，护罩辅件142与延伸部1411远离罩体本体1410的一端配接以使护罩主体141和护罩辅件142形成收容腔106。在本实施例中，护罩辅件142的面积小于等于罩体本体1410的面积，以使护罩辅件142既可以与护罩主体141形成所需的收容腔106，又不会因为体积大的原因使其在第一状态时对其它部分造成干涉。可以理解地，在其它实施例中，护罩辅件142也可以设置成具有延伸部，当护罩辅件142处于第二状态时，护罩辅件142的延伸部与护罩主体141的延伸部配接，形成沿周向覆盖工具头罩体部分。当然可以理解地，在其它实施例中，延伸部也可以只设置于护罩辅件142上。
通过将护罩辅件142在第一状态和第二状态之间切换，使得罩体14既能够 具有能够适应磨削砂轮工作的状态又具有适应切割砂轮工作的状态，优选地，当护罩辅件142位于第一状态时，罩体14符合磨削砂轮的使用，此时磨削砂轮远离马达11的一侧(也即第二侧)没有被护罩辅件142覆盖，磨削砂轮具有更大的磨削面与工件进行接触。当护罩辅件142位于第二状态时，护罩辅件142覆盖于工具头背离马达11的第二侧，此时罩体14通过形成收容腔106隔离手柄部102和工具头13，罩体14不仅能够防止工作过程中产生的金属颗粒的飞溅容易造成操作者受伤，还能够有效避免操作者在握持手柄部102时因手接触到切割盘而造成安全问题，罩体14更符合同切割砂轮一起使用。优选地，为方便常用的砂轮使用(如磨削砂轮、切割砂轮)盘状工具头13被罩体14所覆盖的面积小于等于盘状工具头13面积的一半。
参见图4，在本发明中，角磨机1还包括固定于护罩主体141的连接部15，护罩辅件142通过连接部15与护罩主体141不可拆卸地连接，连接部15包括起导引作用的导向件151，护罩辅件142通过导向件151相对于护罩主体141在第一状态和第二状态之间切换。参见图5，上述延伸部1411于远离罩体本体1410的一端还设有配接部1412，配接部1412用于在护罩辅件142位于第二状态时，可与护罩主体141更好的配合，以形成收容腔106，本实施例中，配接部1412为延伸部向收容腔106内延伸的倒角边。
参见图5，具体的，护罩主体141还设有卡环1413，护罩主体141通过卡环1411可拆卸的安装于主轴外侧的主轴壳体103，用于当护罩主体141破损或因为其他需求更换护罩主体时，可将护罩主体141从主轴壳体103上拆卸下来。
本实施例中，由于护罩辅件142可活动的设置于护罩主体141，具体的，护罩辅件142可活动的固定于护罩主体141，护罩辅件142通过运动活动位于第一状态和第二状态之间切换。以下将结合附图详细说明护罩辅件142与护罩主体 141之间的固定方式。
参见图1-图5，护罩主体141背离工具头13的外侧或收容腔106的外侧设有上述导向件151，优选地，导向件151为导向柱，护罩辅件142通过导向柱可活动的固定于护罩主体141，且护罩辅件142通过绕导向柱转动以及沿着所述导向柱轴向移动的方式进行第一状态和第二状态切换。优选地，导向柱的轴线与主轴12的轴线平行设置。优选地，所述连接部还包括一端固定于罩体本体1410，另一端与导向柱连接的配接件152，所述护罩辅件上设置有卡槽1423，当护罩辅件142处于第一状态时，卡槽1423与所述配接件152配接，从而使护罩辅件142在第一状态时更好的固定于护罩主体141。
连接部还包括连接于导向柱远离配接件152的一端与罩体主体之间的连接件，从而使得导向柱的另一端(也即远离配接件152的一端)也能够固定于罩体主体141，通过将导向件151的两端都进行固定，可有效的防止导向件151变形，减少因导向件151变形带来的护罩辅件142沿导向件151滑动不顺畅等问题。
参见图6，进一步地，为了使护罩辅件142位于第一状态或第二状态时可以固定于护罩主体141，所述罩体14上设有用于对所述护罩辅件142位于第一状态或第二状态进行定位的固定件，所述固定件包括一端固定于延伸部1411，另一端向罩体本体1410延伸的第一卡爪1611，当护罩辅件142处于第一状态时，第一卡爪1611能够将所述护罩辅件142固定于所述护罩主体141。固定件还包括一端固定于延伸部1411，另一端朝背离罩体本体1410延伸的第二卡爪1612，当护罩辅件142处于第二状态时，所述第二卡爪1612能够将所述护罩辅件142固定于护罩主体141。当然，可以理解地，上述卡爪的数量和位置可根据具体需要进行设定。所述固定件还包括设置于延伸部1411的卡凸181，以及设置于护 罩辅件142上用于在所述护罩辅件142位于第二状态时与卡凸配181合作用的卡槽182。当然也可以将卡槽182设置于延伸部1411，并将卡凸181设置于护罩辅件142。
参见图1-图4，以下将结合附图对本实施例中的护罩辅件142位于第一状态和第二状态之间的切换进行详细说明。当护罩辅件142由图1所示的第一状态时切换至图4所示的第二状态时，首先，将护罩辅件142沿导向件151进行旋转至与护罩主体141在主轴12的轴向方向错开，具体的，可将图1中的护罩辅件142沿顺时针方向旋转至图2所示的状态，也即将护罩辅件142沿图1中的箭头f所示的方向旋转，以使护罩辅件142可沿导向件151进行轴向移动；然后，将旋转后的护罩辅件142(也即图2所示的状态)沿主轴15向远离马达马达11的方向进行移动至护罩辅件142在第二状态时对应的轴向预设位置，以下简称第一预设位置，具体的，也即将图2中的护罩辅件142沿导向件151轴按箭头M所示方向移动至图3所示位置；最后，当护罩辅件142沿主轴15移动到第一预设位置(也即图3所示的位置)时，将护罩辅件142沿逆时针方向旋转并与护罩主体141形成收容腔106，具体的，将图3所示状态的护罩辅件142按箭头n方向旋转并与护罩主体141形成收容腔106。
可以理解地，当护罩辅件142由第二状态切换至第一状态时，将处于第二状态的护罩辅件142旋转以使护罩辅件142在主轴12轴向方向与罩体主体141或工具头错开，具体的，可将图4所示的护罩辅件142沿主轴逆时针旋转至图3所示的状态，也即将图4中处于第二状态的护罩辅件142沿图3箭头n的反向旋转形成图3所示的状态；然后，将护罩辅件142沿着导向件151向靠近护罩主体本体1410方向移动至护罩辅件142在第一状态时的轴向预设位置(以下简称第二预设位置)，也即将图3所示状态的护罩辅件142沿图2所示箭头M的反 向移动至图2所示的状态(护罩辅件处于第二预设位置)；最后，将处于第二预设位置的护罩辅件142继续旋转至第一状态，具体的，可将图2所示的护罩辅件242沿图1中箭头f的反向旋转至图1所示状态。也即护罩辅件142由第一、第二状态中之一的状态旋转至另一状态时，包括如下步骤：SS1将所述护罩辅件142由第一、第二状态中之一的状态绕所述导向件151旋转以使所述护罩辅件142避开与护罩主体141沿导向件151轴向上的重叠；SS2将所述护罩辅件142沿所述导向件151进行移动至预设位置；SS3将所述护罩辅件142沿导向件151旋转至第一、第二状态中的另一状态。本实施例通过连接部15将护罩辅件142不可分离地与护罩主体141连接，并使护罩辅件142相对于护罩主体141在第一状态和第二状态之间切换以使罩体14适合多种工具头的使用，这样使得同一罩体不仅能够多用，且在罩体进行状态转换时不容易丢失。需要说明的是，本发明中所说的不可拆卸地连接，指的是护罩辅件142在相对于护罩主体141进行状态转换时，护罩辅件142不需要与护罩主体141脱离连接便可以实现状态转换，而非二者之间一定是不可分离的，换句话说，二者之间的连接可以是可拆卸的也可以是不可拆卸的，只要护罩辅件142在相对于护罩主体141进行状态转换时，二者处于连接状态也可以实现状态转换即可。另外，本实施例通过将护罩辅件142绕导向柱旋转以及沿导向柱进行轴向移动以实现罩体14的状态的改变，使得护罩辅件142在状态转换时不会与工具头干涉，因此，护罩辅件142的状态切换可以在工具头安装于主轴12上的状态下进行，也可以在工具头与主轴12分离的状态下进行。
第二实施例
图7-图11为本发明的第二优选实施例示意图。参见图7和图11，角磨机2包括壳体、位于壳体内部的马达21、主轴22以及工具头23，主轴22靠近马达 21的一端与马达21传动连接且由马达21驱动旋转，主轴22的另一端与工具头23连接并带工具头23执行工作。壳体20包括主壳体201以及与主壳体呈角度设置的手柄部202。马达21包括马达轴211，马达轴211的轴线和主轴22的轴线根据实际工作需要，二者之间形成一定的夹角设置，具体的，夹角可以为直角。主轴22靠近马达21的一端通过传动结构与马达21连接，具体的，传动结构包括齿轮箱，齿轮箱包括固定于输出轴211一端的第一锥齿轮291，且第一锥齿轮291位于输出轴211靠近主轴22的一端，并随输出轴211一起转动。齿轮箱还包括固定于主轴22靠近马达21一端的第二锥齿轮292。第一锥齿轮291在马达21的带动下旋转，并通过第一锥齿轮291与第二锥齿轮292之间的啮合作用带动第二锥齿轮292旋转，进而将输出轴211上的旋转输出力转换成绕着主轴22的旋转力。可以理解地，传动结构，还可以包括减速机构，如二级行星齿轮或三级行星齿轮等。
参见图10，壳体包括位于齿轮箱外部的齿轮箱壳体202，以及套设于主轴22外部且位于齿轮箱壳体2021和工具头23之间的主轴壳体2022。齿轮箱壳体202与马达壳体201和主轴壳体203分别固定连接。本实施例中，齿轮箱壳体202与马达壳体201以及齿轮箱壳体2021与主轴壳体2022之间通过螺栓固定的方式进行连接，具体地，将齿轮箱壳体202的一端与手柄部202靠近第一锥齿轮291的一端对接，然后通过固定螺栓将两者固定连接；将齿轮箱壳体202的另一端与主轴壳体2022靠近马达21的一端对接，然后通过固定螺栓将齿轮箱壳体2021和主轴壳体2022连接。当然，对于手柄部202、齿轮箱壳体2021以及主轴壳体2022之间的连接，还可以通过其他方式进行连接，此处不再赘述。
继续参见图11，本实施例中，角磨机2还包括锁定件，锁定件用于当工具头23需要处于静止状态时，对工具头23以及主轴22进行锁定，具体的，锁定 件通过锁定第二锥齿轮292方式进行锁定工具头23以及主轴22。锁定件包括止挡轴271，止挡轴271可操作地伸入齿轮箱内并与第二锥齿轮292抵接以防止第二锥齿轮292旋转；可以理解地，当需要解除对工具头23的锁定时，止挡轴271退出第二锥齿轮292，以解除对第二锥齿轮292的锁定。上述的齿轮箱壳体202上设有与止挡轴271连接的操作钮273(见图8)，通过按压操作钮273即可实现止挡轴271对第二锥齿轮292的锁定或解锁，锁定操作简单、快捷。
马达输出轴211通过第一轴套29可转动的固定于马达壳体201内部，此处第一轴套29也可以换成第一轴承代替。主轴22通过第二轴承205可转动的固定于主轴壳体203内。可以理解地，由于主轴22靠近马达21的一端与第二锥齿轮292固定，且位于齿轮箱壳体202内部，为使主轴22更好的相对于齿轮箱壳体202转动，主轴22于靠近马达21的一端可以通过第三轴套209或第三轴承使主轴22相对于齿轮箱壳体202转动。
参见图7-图11，工具头23包括压盘，压盘包括套设于主轴22上的第一压盘231以及第二压盘232，工具头23还包括套设于主轴22上且位于第一压盘231和第二压盘232之间的工具本体230。具体的，工具本体230可以为磨削砂轮或切割砂轮等，用以根据需要进行打磨、磨削或切割等工作。为防止打磨、磨削或切割过程中产生的粉尘、颗粒等危害操作者或对环境产生影响，工具头23的外表面覆盖有罩体24。工具头23具有靠近马达的第一侧面23a(见图10)、远离所述马达的第二侧面23b(见图11)。在本实施例中，具体的，工具本体230为夹设于第一压盘231以及第二压盘232之间的盘状工具本体。罩体24覆盖至少部分第一侧面23a；罩体24包括护罩主体241，护罩主体241固定于上述壳体并沿主轴22周向延伸。本实施例中，具体地，护罩主体241固定于主轴壳体203。护罩主体241包括覆盖至少部分上述第一侧面的罩体本体2410，以及由护 罩主体本体2410向远离马达11方向延伸且沿周向至少覆盖部分工具头的延伸部2411。罩体24还包括护罩辅件242，护罩辅件242可活动的连接于护罩主体241，且护罩辅件242可操作的在第一状态和第二状态之间转换。本实施例中，为了使角磨机2工作过程中，护罩主体241可以起到较好的防护作用，但同时不影响工件操作时的便利性，护罩主体本体2410相对于主轴22周向覆盖上述第一侧面13a的角度为α′(工具本体被覆盖面积在相对于主轴在周向上所形成的角度)，160度≤α′≤180度。具体的，参见图10，护罩主体本体2410相对于主轴周向的两个侧边分别为CC和DD表示，角度α′即为图10中CC边和DD边所形成的夹角。角磨机2还包括连接部25，所述护罩辅件242通过连接部25与护罩主体241不可分离地连接。连接部25固定于护罩主体141，连接部25包括导向件251，所述护罩辅件242能够通过导向件251相对于护罩主体241运动以在第一状态和第二状态之间切换。
参见图7-图11，优选地，导向件251为导向柱，护罩辅件242通过导向柱可活动的固定于护罩主体241，且护罩辅件142通过绕导向柱转动以及沿着所述导向柱轴向移动的方式进行第一状态和第二状态切换。优选地，导向柱的轴线与主轴12的轴线平行设置。优选地，所述连接部还包括一端固定于罩体本体2410，另一端与导向柱连接的配接件252，所述护罩辅件上设置有卡槽2423，当护罩辅件242处于第一状态时，卡槽2423与所述配接件252配接，从而使护罩辅件142在第一状态时更好的固定于护罩主体141。
参见图7，护罩辅件242处于第一状态时，护罩辅件242固定于护罩主体241且位于护罩主体本体2410背离工具头23一侧，也即位于上述的齿轮箱壳体202和护罩主体本体2410之间。护罩辅件242上设有缺槽2420，护罩辅件242位于第一状态时，主轴22以及主轴外的壳体203至少部分位于缺槽2420内。
参见图10和图11，当护罩辅件242处于第二状态时，护罩辅件242固定于护罩主体241且与护罩主体共同形成收容至少部分工具头23的收容腔206，护罩辅件242至少覆盖上述第二侧面23b的一部分。优选的，护罩辅件242的面积小于等于护罩主体本体2410的面积，以使护罩辅件242在位于第二状态时，既可以与护罩主体241形成所需的收容腔206，又不会因为体积大的原因对其他部分造成干涉。护罩辅件242为板状罩体，护罩辅件242位于第一状态时，护罩辅件242叠放于护罩主体本体1410远离收容腔206的一侧面。护罩辅件242位于第二状态时，缺槽2420与收容腔206内压盘在护罩辅件242上投影位置相对应，通过在护罩辅件242上设置缺槽2420可有效提高角磨机工作时的便利性，降低因加工件周围物体存在带来对加工过程的妨碍或干涉。
继续参见图10，具体的，护罩主体241还设有卡环2413，护罩主体241通过卡环2413可拆卸的安装于主轴22外侧的主轴壳体203，用于当护罩主体241破损或因为其他需求更换护罩主体241时，可将护罩主体241从主轴壳体203上拆卸下来。
本实施例中，由于护罩辅件242可活动地设置于护罩主体241，具体的，护罩辅件142可活动的固定于护罩主体241，并通过将护罩辅件242相对于护罩主体241运动以进行第一状态和第二状态切换。
参见图7，罩体24上设有用于对护罩辅件242位于第一状态或第二状态进行定位的固定件，所述固定件包括一端固定于延伸部2411，另一端向罩体本体2410延伸的第一卡爪2611，当护罩辅件242处于第一状态时，第一卡爪2611能够将所述护罩辅件242固定于护罩主体241。固定件还包括一端固定于延伸部2411，另一端朝背离罩体本体2410延伸的第二卡爪(图中未示出)，当护罩辅件242处于第二状态时，所述第二卡爪能够将所述护罩辅件242固定于护罩主 体241。当然，可以理解地，上述卡爪的数量和位置可根据具体需要进行设定。
本实施例的上述描述的结构与第一实时例中的结构基本相同，本实施例与上述的第一实施例主要不同的是，本实施例中导向柱的位置，以及护罩辅件242相对于护罩主体241在第一状态和第二状态之间切换时的运动方式。
参见图7-图11，以下将结合附图对本实施例中的护罩辅件242位于第一状态和第二状态之间的切换进行详细说明。当护罩辅件242由图7所示的第一状态时切换至图10所示的第二状态时，首先，将护罩辅件242沿导向件251进行旋转至与护罩主体241于主轴22的轴向方向错开，具体地，可将图7中的护罩辅件242按箭头f所示方向旋转至图8所示的状态，以使护罩辅件242可沿导向件25进行轴向移动；然后，将旋转后的护罩辅件242沿导向件251向远离马达21的方向进行移动至护罩辅件242在第二状态时的轴向预设位置，以下简称第一预设位置，具体的，可将护罩辅件242由图8所示的状态按箭头M′沿导向件25轴向移动至图9所示位置；当护罩辅件242沿主轴25移动到第一预设位置后，最后，将护罩辅件242旋转并与护罩主体241形成收容腔206，具体的，也即将图9所示的护罩辅件按图9中所示的箭头n′的方向旋转并与护罩主体241形成收容腔206。可以理解地，在其他实施例中，护罩辅件242还可以继续沿着与箭头n′标示的方向相反的方向旋转的方式至图10所示的状态，以形成与护罩主体241配合的收容腔206。
当护罩辅件242由图10所示的第二状态切换至图7所示的第一状态时，将处于图10所示的第二状态的护罩辅件242旋转以使工具头23对护罩辅件242在主轴22轴向方向错开，具体的，可将图10所示的护罩辅件242按图9所示的箭头n′的反向旋转至图9所示的状态；将护罩辅件242沿着导向件251向靠近护罩主体本体2410方向移动至护罩辅件242在第一状态时的轴向预设位置 (以下简称第二预设位置)，具体的，将图9所示的护罩辅件242沿图8中箭头M′的反向移动至图8所示状态；将处于第二预设位置的护罩辅件242继续旋转至第一状态，具体的，可将图8所示的护罩辅件242沿图7中箭头f的反向至图7所示状态。
在上述的第一实施例和第二实施例中，护罩辅件均通过连接部与护罩主体可活动连接，可以理解地，对于护罩辅件位于第一状态和第二状态之间的切换方式，护罩辅件也可以通过可拆卸(可分离)的方式与护罩主体连接，也即护罩辅件242与护罩主体241之间不设有上述连接部以将二者进行连接。对于护罩辅件位于第一状态或第二状态的固定，可以通过上述的固定件进行固定，此处不再赘述。
以上已经描述了本公开的各实施例，上述说明是示例性的，并非穷尽性的，并且也不限于所披露的各实施例。在不偏离所说明的各实施例的范围和精神的情况下，对于本技术领域的普通技术人员来说许多修改和变更都是显而易见的。本文中所用术语的选择，旨在最好地解释各实施例的原理、实际应用或对市场中的技术改进，或者使本技术领域的其它普通技术人员能理解本文披露的各实施例。

Claims (12)

  1. 一种手持式工具，包括：
    马达，用于提供驱动力；
    壳体，包括主壳体、以及与所述主壳体壳呈角度设置的握持部；
    主轴，至少部分收容于所述主壳体且由所述马达驱动旋转，用于配接工具头；以及
    护罩，连接于所述主壳体，用于覆盖至少部分所述工具头；
    其特征在于，所述护罩包括护罩主体、以及与所述护罩主体活动连接的护罩辅件，所述护罩辅件可操作地相对于护罩主体在相对于壳体固定的第一状态与第二状态之间转换，第一状态时，所述护罩辅件位于护罩主体靠近马达的一侧且与所述护罩主体交叠；第二状态时，所述护罩辅件位于护罩主体远离马达的一侧、且与所述护罩主体共同围成用于收容至少部分工具头的收容腔；
    所述手持式工具还包括连接部，所述护罩辅件通过连接部与护罩主体不可分离地连接，所述连接部固定于护罩主体，所述连接部包括导向件，所述护罩辅件能够通过导向件相对于护罩主体运动以在第一状态和第二状态之间切换，所述导向件包括导向柱，所述护罩辅件能够沿所述导向柱的轴向进行旋转以使护罩辅件能够沿导向柱的轴向运动，以在第一状态和第二状态之间切换。
  2. 根据权利要求1所述的手持式工具，所述连接部还包括一端固定于罩体本体，另一端与导向柱连接的配接件，所述护罩辅件上设置有卡槽，当所述护罩辅件处于第一状态时，所述卡槽与所述配接件配接。
  3. 根据权利要求1所述的手持式工具，其特征在于，所述工具头具有靠近马达的第一侧以及背离马达的第二侧，所述护罩主体包括能够覆盖至少部分第一侧的罩体本体以及由罩体本体向背离马达方向延伸以沿周向覆盖至少部分工具头的延伸部，当处于第二状态时，所述护罩辅件覆盖至少部分所述第二侧。
  4. 根据权利要求3所述的手持式工具，其特征在于，所述罩体上设有固定件，所述固定件用于将所述护罩辅件在第一状态或第二状态固定于所述护罩主体。
  5. 根据权利要求4所述的手持式工具，其特征在于，所述固定件包括一端固定于延伸部，另一端向罩体本体延伸的第一卡爪，当护罩辅件处于第一状态时，所述第一卡爪能够将所述护罩辅件固定于所述护罩主体。
  6. 根据权利要求4所述的手持式工具，其特征在于，所述固定件包括一端固定于延伸部，另一端朝背离罩体本体延伸的第二卡爪，当护罩辅件处于第二状态时，所述第二卡爪能够将所述护罩辅件固定于所述护罩主体。
  7. 根据权利要求4所述的手持式工具，其特征在于，所述固定件包括设置于护罩主体和护罩辅件二者之一的卡凸，设置于二者之另一的卡扣，当护罩辅件处于第二状态时，所述卡扣与所述卡凸配接以使所述护罩辅件相对于所述护罩主体固定。
  8. 根据权利要求1所述的手持式工具，其特征在于，所述工具头包括盘状工具片，所述盘状工具片被所述护罩主体所覆盖的面积小于等于盘状工具片面积的一半。
  9. 一种手持式工具的操作方法，用于上述权利要求1所述的手持式工具，其特征在于，所述护罩辅件由第一、第二状态中之一的状态旋转至另一状态时，包括如下步骤：
    SS1：将所述护罩辅件由第一、第二状态中之一的状态绕所述导向件旋转以使所述护罩辅件避开与护罩主体沿导向件轴向上的重叠；
    SS2：将所述护罩辅件沿所述导向件进行移动至预设位置；
    SS3：将所述护罩辅件沿导向件旋转至第一、第二状态中的另一状态。
  10. 一种手持式工具的罩体，用于遮覆手持式工具的工具头，包括护罩主体，所述护罩主体包括罩体本体以及由罩体本体延伸且与罩体本体呈角度设置的延伸部，且所述罩体本体和所述延伸部形成能够收容至少部分工具头的罩体内侧；
    护罩辅件，所述护罩辅件可活动地与所述护罩主体连接，以及
    连接部，所述连接部用于将护罩辅件不可分离地与所述护罩主体连接；其特征在于，所述连接部还包括导向件，所述护罩辅件能够通过导向件相对于护罩主体在第一状态和第二状态之间切换；
    第一状态时，所述护罩辅件位于所述罩体本体背离所述罩体内侧的一侧，且与所述罩体本体至少部分重叠；第二状态时，所述护罩辅件与所述延伸部背离罩体本体的一端配接，从而所述护罩主体以及所述护罩辅件形成能够收容至少部分所述工具头的收容腔。
  11. 根据权利要求10所述的手持式工具的罩体，其特征在于，所述连接部固定于护罩主体，所述导向件呈柱状，所述护罩辅件能够沿所述导向件轴线进行旋转以使护罩辅件能够沿导向件的轴向进行运动，从而在第一状态和第二状态之间切换。
  12. 一种手持式工具，包括：
    马达，用于提供驱动力；
    壳体，包括主壳体、以及与所述主壳体呈角度设置的握持部；
    主轴，至少部分收容于所述主壳体且由所述马达驱动旋转，用于配接工具头；以及
    护罩，连接于所述主壳体，用于覆盖至少部分工具头；
    其特征在于，所述工具头具有靠近马达的第一侧以及背离马达的第二侧， 所述护罩包括护罩主体以及与所述护罩主体活动连接的护罩辅件，所述护罩主体包括覆盖至少部分所述第一侧的罩体本体，所述护罩辅件可操作地相对于工具头运动以在第一状态和第二状态之间转换，第一状态时，所述护罩辅件位于所述工具头的第一侧所在侧并与罩体本体至少部分重叠；第二状态时，所述护罩辅件位于所述工具头的第二侧所在侧并覆盖至少部分所述第二侧，且所述护罩辅件与所述护罩主体配接形成收容至少部分所述工具头的收容腔以隔离握持部和工具头。
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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29717099U1 (de) * 1997-09-23 1997-12-04 Liu Wun Hui Schleifmaschine mit Schutzabdeckung
CN102632459A (zh) * 2012-03-29 2012-08-15 南京德朔实业有限公司 角磨机两用护罩
JP2013193177A (ja) * 2012-03-21 2013-09-30 Makita Corp 保護カバー及び保護カバーを装着した注水式電動工具
CN206794903U (zh) * 2017-04-10 2017-12-26 南京德朔实业有限公司 手持式切割工具
CN207372905U (zh) * 2017-07-04 2018-05-18 创科（澳门离岸商业服务）有限公司 角磨机及角磨机护罩
CN208261956U (zh) * 2018-05-25 2018-12-21 南京德朔实业有限公司 角磨机

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29717099U1 (de) * 1997-09-23 1997-12-04 Liu Wun Hui Schleifmaschine mit Schutzabdeckung
JP2013193177A (ja) * 2012-03-21 2013-09-30 Makita Corp 保護カバー及び保護カバーを装着した注水式電動工具
CN102632459A (zh) * 2012-03-29 2012-08-15 南京德朔实业有限公司 角磨机两用护罩
CN206794903U (zh) * 2017-04-10 2017-12-26 南京德朔实业有限公司 手持式切割工具
CN207372905U (zh) * 2017-07-04 2018-05-18 创科（澳门离岸商业服务）有限公司 角磨机及角磨机护罩
CN208261956U (zh) * 2018-05-25 2018-12-21 南京德朔实业有限公司 角磨机

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