A hand-held multi-mode electric pick and control system therefor

Abstract

The application discloses a handheld multi-mode electric pick and a control system thereof, and relates to the technical field of electric tools. The shell is internally provided with a containing box for placing a motor, and the containing box is internally provided with a flow guide pipe which is communicated with a blast cavity and an external environment. When the motor temperature is at a low level, the airflow circulates through the flow guide pipe and cools the motor in a sealed environment. When the motor temperature rises, the sealing element is moved from a retracted position to an expanded position, so that the airflow passes through the driving shaft and directly cools the internal area of the motor, thereby accelerating the cooling efficiency. When the motor temperature rises to a preset limit, the control adjustment window is opened, the cold airflow flows through the motor, and the motor is directly cooled, so that the cooling efficiency of the motor is further improved. The application adopts different cooling modes according to different motor temperatures, so that the motor is efficiently cooled and cooled under the condition that dust invasion into the motor is as little as possible.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric tools, in particular to a handheld multi-mode electric breaker and a control system thereof. BACKGROUND

[0002] With the continuous development of electric tool technology, the electric breaker, as a widely used electric tool in the fields of construction, decoration, etc., has significantly improved in functionality and efficiency. In order to meet the needs of different working scenarios, modern electric breaker products have gradually developed towards multifunctional direction, integrating various functions such as electric hammer, electric drill, etc. in one, which greatly improves the versatility and convenience of the tool. Users can quickly switch between working modes according to actual needs without carrying multiple tools.

[0003] In the working process of the electric breaker, the motor as its core power component directly determines the working efficiency and reliability of the electric breaker. Currently, the motor in the electric breaker usually adopts air cooling direct blowing for cooling and heat dissipation. Due to the harsh working environment of the electric breaker, such as breaking operation of hard materials such as cement and concrete, a large amount of dust is diffused in the surrounding air. Over time, more dust invades the rotor and stator, and the existence of dust forms a heat insulation layer, reducing heat conduction efficiency and increasing thermal resistance (increasing the resistance of heat transfer from the heat source to the surrounding environment), which is easy to cause the internal temperature of the motor to rise and produce high temperature overheating phenomenon.

[0004] In addition, the multi-mode working characteristics of the electric breaker also exacerbate the problem of high temperature of the motor. The multi-mode working of the electric breaker means that the electric breaker needs to switch from one mode to another mode for continuous work, which often requires the electric breaker to work for a long time and continuously, further exacerbating the high temperature of the motor. The heat dissipation demand of the motor increases significantly, and the traditional air cooling heat dissipation method is difficult to meet this demand. Especially during the multi-mode switching process, the load and speed of the motor may change suddenly, further increasing the thermal load of the motor, making the motor more prone to overheating, resulting in the electric breaker often stopping working automatically due to high temperature of the motor. This will affect the progress of work and also reduce the service life of the motor.

[0005] Therefore, how to develop an electric breaker motor heat dissipation system that can effectively dissipate heat and prevent dust invasion has become a technical problem to be solved in the electric breaker technical field. SUMMARY

[0006] The purpose of the present application is to provide a handheld multi-mode electric breaker and a control system thereof, aiming to improve the problem that the heat dissipation efficiency of the motor in the electric breaker is reduced and high temperature overheating frequently occurs due to dust invasion when the motor works.

[0007] In order to achieve the above object, in a first aspect, the embodiments of the present application provide a handheld multi-mode electric pick, comprising a motor, a transmission assembly and an impact assembly, the handheld multi-mode electric pick has a hammering mode and a hammer drilling mode, comprising:

[0008] A housing, the motor, the transmission assembly and the impact assembly are all accommodated in the housing;

[0009] A containing box is arranged in the housing, the motor is accommodated in the containing box, and the outer periphery of the motor is arranged at a distance from the inner side wall of the containing box in the radial direction of the motor, so that the space between the two forms a first space;

[0010] A vane is coaxially sleeved on the drive shaft of the motor, the vane is arranged above the containing box at intervals, so that the vane and the containing box form an air supply cavity;

[0011] A plurality of flow guide pipes are arranged in the first space, the plurality of flow guide pipes are arranged at intervals in the axial direction of the drive shaft and surround the drive shaft; in the axial direction of the motor, one end of each flow guide pipe is in communication with the air supply cavity, and the other end is in communication with the outside;

[0012] A plurality of adjustment windows are arranged, the plurality of adjustment windows are arranged at intervals on the circumferential side wall of the containing box and surround the drive shaft; the adjustment window has an open position and a closed position, when the adjustment window is in the open position, the first space is in communication with the outside and the air supply cavity; when the adjustment window is in the closed position, the containing box is sealed; and

[0013] An air supply port is arranged on the side wall of the housing, and the air supply port is located above the vane.

[0014] In an embodiment, the containing box comprises a top plate, the drive shaft passes through the top plate from bottom to top; and

[0015] A side plate, in the axial direction of the motor, one end of the side plate is connected to the bottom wall of the top plate, and the other end is fixedly abutted against the bottom wall of the housing.

[0016] In an embodiment, the top plate comprises a first sub-plate body, the first sub-plate body is coaxially sleeved on the drive shaft; the upper end of each flow guide pipe is connected to the first sub-plate body; and

[0017] A second sub-plate body is arranged coaxially outside the first sub-plate body, one end of the second sub-plate body away from the first sub-plate body is fixedly connected to the side plate, and the other end of the second sub-plate body close to the first sub-plate body is rotationally connected to the circumferential side of the first sub-plate body;

[0018] The accommodating box further comprises a rotating ring coaxially arranged on the bottom wall of the shell, penetrating the bottom wall of the shell in the axial direction of the motor, and the lower end of each of the flow guide pipes is connected to the rotating ring; a plurality of first air outlet holes are arranged on the rotating ring;

[0019] The adjusting window is arranged on the second sub-plate body and / or the side plate.

[0020] In an embodiment, the adjusting window comprises a first hole arranged on the side plate, the first hole penetrating the side plate in the radial direction of the motor and in the axial direction of the motor; and

[0021] A second hole is arranged on the second sub-plate body, the second hole penetrating the outer circumferential side of the second sub-plate body in the radial direction of the motor and penetrating the second sub-plate body in the axial direction of the motor; the first hole and the second hole are located in correspondence in the radial direction of the motor and form a first adjusting hole;

[0022] An adjusting plate is movably connected to the accommodating box along the circumferential direction of the accommodating box, the adjusting plate has an open position and a closed position, the adjusting plate is accommodated in the side plate and the second sub-plate body, the adjusting plate is in the open position and the first adjusting hole is opened; the adjusting plate is located in the adjusting hole, the adjusting plate is in the closed position and the first adjusting hole is sealed.

[0023] In an embodiment, in the radial direction of the motor, the circumferential side of the accommodating box is spaced apart from the inner wall of the shell, so that a second space is formed between the circumferential side of the accommodating box and the inner wall of the shell, which communicates with the air supply cavity;

[0024] In the axial direction of the motor, a plurality of second air outlet holes are arranged on the bottom wall of the shell corresponding to the second space.

[0025] In an embodiment, the driving shaft extends downward from one end of the blade away from the shell;

[0026] The circumferential side of the driving shaft located in the air supply cavity has a plurality of openings, and the plurality of openings are arranged in the axial direction of the motor; a flow channel corresponding to the openings is arranged in the driving shaft, and the flow channel extends in the axial direction of the motor;

[0027] In the axial direction of the motor, the upper end of the flow channel communicates with the opening, and the lower end of the flow channel penetrates the driving shaft downward.

[0028] In an embodiment, the handheld multi-mode electric grabber further comprises a sealing member movably arranged in the opening, the sealing member has an unfolded position and a folded position;

[0029] The seal is in the unfolded position, opening the opening, for introducing airflow into the opening and into the flow channel; the seal is in the folded position, for sealing the opening; the outer contour of the seal matches the outer contour of the drive shaft when the seal is in the folded position.

[0030] In an embodiment, the handheld multi-mode electric breaker further comprises a drive rod coaxially arranged in the drive shaft, a lower end of the drive rod at least partially protruding from the drive shaft, and the lower end of the drive rod being threadedly connected to the housing; and

[0031] a bearing, an inner ring of the bearing being sleeved on an outer periphery of the drive rod;

[0032] a connecting rod, one end of the connecting rod being rotatably mounted to an outer ring of the bearing in the radial direction of the motor, and the other end of the connecting rod being rotatably mounted to the seal; rotating the drive rod drives the seal to move between the unfolded position and the folded position.

[0033] In an embodiment, a channel is coaxially arranged in the drive shaft, the drive rod being movably arranged in the channel, and the drive rod being a metal structural member;

[0034] the drive rod has a lumen, and a liquid absorption core is arranged on an inner wall of the lumen, the liquid absorption core storing a low-boiling-point liquid therein; the liquid absorption core is formed with an air passage on a side away from the inner wall of the lumen, and the lumen is in a vacuum environment;

[0035] a heat exchange port is arranged on a periphery of the drive shaft above the opening and in communication with the channel, and the heat exchange port is arranged to be staggered with the opening in the axial direction of the motor.

[0036] In a second aspect, the embodiments of the present application provide a control system, which adopts the handheld multi-mode electric breaker described in the above embodiments, and comprises a temperature sensor arranged in the motor and configured to collect temperature information of the motor;

[0037] a drive member configured to drive the adjusting plate to move between the open position and the closed position;

[0038] a central controller electrically connected to the temperature sensor and the drive member, the central controller receiving the temperature information of the motor and controlling the drive member to drive the adjusting plate to move between the open position and the closed position.

[0039] Compared with the prior art, the handheld multi-mode electric grabber and the control system thereof have the beneficial effects that: the accommodating box for placing the motor is arranged in the shell, and the accommodating box is provided with the flow guide pipe communicated with the air supply cavity and the external environment; when the motor temperature is at a low level, a sealed environment is formed in the accommodating box, the airflow circulates through the flow guide pipe and cools the motor in the sealed environment; since the airflow does not contact the motor, dust in the airflow is prevented from entering the motor; when the motor temperature rises, the sealing member is driven to move from the folded position to the unfolded position, so that the airflow passes through the driving shaft and directly cools the core area inside the motor, thereby accelerating the cooling efficiency; when the motor temperature rises to a preset limit level, the control adjustment window is opened, so that the cold airflow directly flows through the motor to directly cool the motor, thereby further improving the cooling efficiency of the motor; the different cooling modes are adopted according to the change of the motor temperature, so that the motor is cooled and cooled with high efficiency while the dust entering the motor is reduced as much as possible, and the situation that the motor is frequently overheated and stopped is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0040] Figure 1 It is an overall structure schematic diagram of the electric grabber according to an embodiment of the present application.

[0041] Figure 2 It is an overall structure schematic diagram of the electric grabber according to an embodiment of the present application. Figure 1 It is an overall structure schematic diagram of the electric grabber according to an embodiment of the present application.

[0042] Figure 3 It is an overall structure schematic diagram of the electric grabber according to an embodiment of the present application.

[0043] Figure 4 It is an overall structure schematic diagram of the electric grabber according to an embodiment of the present application. Figure 3 It is an overall structure schematic diagram of the electric grabber according to an embodiment of the present application.

[0044] Figure 5 It is an overall structure schematic diagram of the electric grabber according to an embodiment of the present application.

[0045] Figure 6 It is an overall structure schematic diagram of the electric grabber according to an embodiment of the present application.

[0046] Figure 7 It is an overall structure schematic diagram of the electric grabber according to an embodiment of the present application.

[0047] Figure 8 It is an overall structure schematic diagram of the electric grabber according to an embodiment of the present application.

[0048] Figure 9 It is an overall structure schematic diagram of the electric grabber according to an embodiment of the present application. Figure 8 It is an overall structure schematic diagram of the electric grabber according to an embodiment of the present application.

[0049] Figure 10This is a schematic diagram of the partial cross-sectional structure of the shell according to an embodiment of the present invention;

[0050] Figure 11 This is a schematic diagram showing the positional relationship between the receiving box, the air supply cavity, and the blades in one embodiment of the present invention;

[0051] Figure 12 For the present invention Figure 11 Another structural diagram from a different perspective;

[0052] Figure 13 This is a schematic diagram of the separation state of the adjusting ring and the annular plate according to an embodiment of the present invention;

[0053] Figure 14 This is a cross-sectional view of a container box according to an embodiment of the present invention;

[0054] Figure 15 This is a schematic diagram of the connection relationship between the drive shaft and the motor according to an embodiment of the present invention;

[0055] Figure 16 This is a schematic diagram showing the state of the drive rod at different positions within the drive shaft according to an embodiment of the present invention;

[0056] Figure 17 This is a schematic diagram of a drive rod structure according to an embodiment of the present invention.

[0057] In the picture, 100 represents an electric pickaxe;

[0058] 1. Motor; 11. Drive shaft; 111. Opening; 112. Flow channel; 113. Channel; 114. Heat exchange port; 115. Blade;

[0059] 2. Housing; 21. Air supply chamber; 22. Air outlet; 23. Second space; 24. Second air outlet; 25. Annular plate; 251. Rotating chamber; 252. Fixing hole; 26. Protective plate; 261. Third air outlet;

[0060] 3. Receiving box; 31. Top plate; 311. First sub-plate; 3111. Air inlet; 312. Second sub-plate; 3121. Second hole; 32. Side plate; 321. First hole; 33. Rotary ring; 331. First air outlet; 332. Exhaust outlet; 34. First space; 35. Adjustment plate; 351. First plate; 352. Second plate;

[0061] 4. Adjusting ring; 41. Second adjusting hole; 42. Gear train; 43. Adjusting gear;

[0062] 5. Diversion pipe; 51. Inclined pipe section; 52. Straight pipe section;

[0063] 6. Sealing components;

[0064] 7. Fix the clamp;

[0065] 8, drive rod; 81, second bearing; 82, connecting rod; 83, lumen; 831, airway; 84, wick;

[0066] 9, transmission assembly; 91, first gear; 92, second gear; 93, third gear; 94, fourth gear; 95, reversing gear set; 96, fifth gear; 97, sixth gear;

[0067] 10, impact assembly; 101, eccentric; 102, swing rod; 103, hammer; 104, impact rod. DETAILED DESCRIPTION

[0068] The specific embodiments of the present application will be further described in conjunction with the drawings and examples. The following examples are used to illustrate the present application, but not to limit the scope of the present application.

[0069] In the description of the present application, it should be understood that the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. It should be understood that the terms "first", "second", etc. are used to describe various information in the present application, but these information should not be limited to these terms, and these terms are only used to distinguish the same type of information from each other. For example, the "first" information can also be referred to as "second" information without departing from the scope of the present application, and similarly, the "second" information can also be referred to as "first" information.

[0070] Reference Figures 1-17As shown in the first aspect, the embodiment of the present application provides a handheld multi-mode electric pick 100, which comprises a motor 1, a transmission assembly 9 and an impact assembly 10. The handheld multi-mode electric pick 100 has a hammering mode and a hammer drilling mode. The handheld multi-mode electric pick 100 further comprises a housing 2, and the motor 1, the transmission assembly 9 and the impact assembly 10 are accommodated in the housing 2. The embodiment provides a structure capable of realizing the hammering mode and the hammer drilling mode, and the structure is as follows: the impact assembly 10 comprises an eccentric wheel 101 and a swing lever 102 rotatably installed with the eccentric wheel 101. The other end of the swing lever 102 is rotatably installed with a hammer 103. The hammer 103 is slidably installed in the housing 2. A striker 104 is arranged at the end of the hammer 103 away from the swing lever 102. A bearing seat is installed in the housing 2, and a first bearing is assembled in the bearing seat. The striker 104 is arranged through the inner ring of the first bearing, and the striker 104 is slidably installed on the inner ring of the first bearing along the axial direction of the first bearing. A sliding groove is formed in the inner ring of the first bearing for slidably assembling the striker 104. The striker 104 can slide a proper distance along the axial direction of the first bearing. An elastic member is connected between the striker 104 and the housing 2. When the hammer 103 is out of contact with the striker 104, the striker 104 can be reset under the action of the elastic member. Alternatively, the striker 104 is directly coaxially fixedly installed on the inner ring of the first bearing. A compression deformation member (such as a rubber block) is arranged at the end of the striker 104 facing the hammer 103, which is used to buffer the impact force of the hammer 103 to a certain extent. When the hammer 103 hits the compression deformation member, the compression deformation member is deformed to a certain extent, and then the impact force is transmitted to the striker 104, and finally the breaking operation is realized through the striker 104 and the pick head.

[0071] The end of the striker 104 away from the hammer 103 is connected with a fixed chuck 7, which is used to fix a drill bit or a pick head. The transmission assembly 9 comprises a first gear 91 coaxially sleeved on the driving shaft 11 of the motor 1. The first gear 91 drives a second gear 92 rotatably installed coaxially with the eccentric wheel 101. A third gear 93 is arranged below the second gear 92 and rotatably installed coaxially with the second gear 92. The third gear 93 is engaged with a fourth gear 94 rotatably installed in the housing 2. The fourth gear 94 drives a fifth gear 96 through a reversing gear set 95. The fifth gear 96 is engaged with a sixth gear 97 coaxially sleeved on the outer periphery of the striker 104. The shaft of the fifth gear 96 is a telescopic shaft, such as an electric telescopic rod. The engagement or disengagement between the fifth gear 96 and the sixth gear 97 is realized by controlling the extension and retraction of the electric telescopic rod. The fifth gear 96 and the sixth gear 97 are bevel gears, which can better avoid the collision between the two gears during the process of disengagement and engagement, and reduce the wear between the two gears.

[0072] When the electric pick 100 performs the hammering mode, the pick head is installed in the fixed chuck 7; first, the fifth gear 96 shaft is controlled to move in and out, so that the fifth gear 96 and the sixth gear 97 are disengaged; when the motor 1 is started, the driving shaft 11 rotates through the eccentric wheel 101 of the first gear 91 and the second gear 92, the eccentric wheel 101 drives the hammer 103 to move back and forth in the shell 2 through the matched swing rod 102, and when the hammer 103 moves to the limit position away from the eccentric wheel 101 on the reciprocating path of the hammer 103, the hammer 103 hits the impact rod 104 and transmits the impact force to the pick head through the impact rod 104, thereby realizing the crushing treatment of hard structures (such as cement, concrete, etc.); at this time, the impact rod 104 does not rotate because the fifth gear 96 and the sixth gear 97 are in a disengaged state.

[0073] When the electric pick 100 performs the hammering mode, the pick head is installed in the fixed chuck 7; first, the fifth gear 96 shaft is controlled to move in and out, so that the fifth gear 96 and the sixth gear 97 are disengaged; when the motor 1 is started, the driving shaft 11 rotates through the eccentric wheel 101 of the first gear 91 and the second gear 92, the eccentric wheel 101 drives the hammer 103 to move back and forth in the shell 2 through the matched swing rod 102, and when the hammer 103 moves to the limit position away from the eccentric wheel 101 on the reciprocating path of the hammer 103, the hammer 103 hits the impact rod 104 and transmits the impact force to the pick head through the impact rod 104, thereby realizing the crushing treatment of hard structures (such as cement, concrete, etc.); at this time, the impact rod 104 does not rotate because the fifth gear 96 and the sixth gear 97 are in a disengaged state.

[0074] The above is only one embodiment provided by the present application which enables the electric grab 100 to realize the hammering mode and hammer drill mode functions. Any other structure capable of realizing the above functions is also acceptable, and the present application does not limit the structure capable of realizing the above functions. The innovation of the present application is not in this aspect. The innovation of the present application is how to reduce the probability of dust entering the motor 1 as much as possible on the basis of efficiently cooling and dissipating heat of the motor 1. When the electric grab 100 performs the demolition work of cement, concrete and other structures, a large amount of dust is often generated. The large amount of dust fills the working environment of the electric grab 100, which causes the dust diffused in the air to be sent into the motor 1 along with the cold air when the motor 1 in the electric grab 100 is ventilated and cooled, so that a layer of dust is attached to the surface of the stator and rotor in the motor 1. The dust attached to the surface forms a heat insulation layer and also increases the thermal resistance, which causes the heat of the motor 1 to be unable to be quickly and efficiently dissipated outward. In addition, the multi-mode electric grab 100 needs to switch different function modes when working, so that the electric grab 100 often needs to work for a long time and continuously, which causes the motor 1 to frequently generate high temperature overheating and automatically stop, thereby affecting the working efficiency and also affecting the service life of the motor 1.

[0075] The following mainly describes the scheme for cooling and dissipating heat of the motor 1 and reducing dust from entering the motor 1. It should be noted that the scheme for cooling and dissipating heat of the motor 1 and reducing dust from entering the motor 1 in the present application is applicable to any electric grab 100, electric hammer, electric drill and other electric tools, and is not limited to the multi-mode electric grab 100 in the present application.

[0076] As shown in Figure 14 , the housing 2 is provided with a containing box 3, and the motor 1 is received in the containing box 3. In the radial direction of the motor 1, the outer periphery of the motor 1 is spaced apart from the inner side wall of the containing box 3, so that the space between the outer periphery of the motor 1 and the inner side wall of the containing box 3 forms a first space 34. The drive shaft 11 of the motor 1 penetrates upwardly out of the containing box 3. In the housing 2 above the containing box 3, a blade 115 is provided, which is coaxially sleeved on the drive shaft 11 of the motor 1. The space between the blade 115 and the containing box 3 forms an air supply cavity 21. As shown in Figure 3 , Figure 10 , a plurality of air supply openings 22 are provided on the housing 2 and are in communication with the outside and the air supply cavity 21. The air supply openings 22 are spaced apart in the axial direction of the motor 1 and are distributed on the side wall of the housing 2. The air supply openings 22 are provided on the side wall of the housing 2 above the blade 115. When the motor 1 is started, the blade 115 driven by the synchronous belt rotates in the housing 2, so that the cold air from the outside is sucked into the air supply cavity 21 through the air supply openings 22.

[0077] In the present embodiment, as shown in Figure 10As shown, a plurality of guide tubes 5 are arranged in the first space 34 and are spaced apart in the axial direction of the motor 1; in the axial direction of the motor 1, the upper end of each guide tube 5 is in communication with the air supply cavity 21, and the lower end is in communication with the external environment; when the motor 1 is started, the external cold air is sucked into the air supply cavity 21 through the air supply port 22, and then enters each guide tube 5 through the air supply cavity 21; the cold air flows through the guide tube 5 and exchanges heat with the hot gas in the first space 34 (the heat generated by the motor 1 causes the temperature in the first space 34 to rise), thereby transferring heat from the first space 34 to the cold air flowing through the guide tube 5, and being discharged from the lower end of the guide tube 5 to the environment outside the housing 2 as the cold air moves, thereby achieving the effect of cooling and dissipating heat from the motor 1; since the airflow does not directly contact the motor 1 (indirect cooling), the dust contained in the airflow is prevented from entering the interior of the motor 1, thereby preventing a layer of dust from adhering to the surface of the stator and rotor in the motor 1, reducing the cooling efficiency of the motor 1, and causing the motor 1 to frequently overheat; in this embodiment, the motor 1 is only used for cooling and dissipating heat when the temperature of the motor 1 is low.

[0078] In this embodiment, when the temperature in the motor 1 continues to rise, the above-mentioned indirect cooling method cannot inhibit the rise of the temperature of the motor 1, and direct cooling of the motor 1 is required; based on this, this embodiment provides an implementation mode capable of directly cooling the motor 1 when the temperature of the motor 1 continues to rise, as follows:

[0079] A plurality of adjustment windows are arranged on the circumferential side wall of the containing box 3, and each adjustment window has an open position and a closed position; when the motor 1 is cooled by the indirect cooling method, each adjustment window is in the closed position (as shown in Figure 7 ), which seals the containing box 3, so that the environment of the motor 1 is isolated from the external environment, thereby achieving indirect cooling of the motor 1 (to prevent dust contained in the air from entering the motor 1); when the temperature in the motor 1 continues to rise, each adjustment window is moved from the closed position to the open position (as shown in Figure 6 ), so that the containing box 3 is opened and the first space 34 is in communication with the external environment; at this time, the cold air flows directly into the containing box 3 from the air supply cavity 21 under the action of the blade 115, and directly flows through the surface of the motor 1, thereby achieving direct cooling of the motor 1, thereby increasing the cooling efficiency and inhibiting the rise of the temperature of the motor 1; at this time, the cooling and heat dissipation of the motor 1 is the primary requirement to prevent the motor 1 from overheating and stopping working.

[0080] Referring to Figure 5 , Figure 6 , Figure 7As shown, in an embodiment of the present application, the accommodating box 3 comprises a top plate 31, the driving shaft 11 penetrates the top plate 31 from bottom to top; and a side plate 32, in the axial direction of the motor 1, one end of the side plate 32 is connected to the bottom wall of the top plate 31, and the other end is fixedly abutted to the bottom wall of the shell 2 (for example, the bottom end of the side plate 32 can be fixedly installed on the bottom wall of the shell 2 through a fastener, or connected and fixed between the bottom wall of the shell 2 through welding), so that the top plate 31, the side plate 32 and the bottom wall of the shell 2 form a sealed environment for placing the motor 1; in this embodiment, the top plate 31 and the side plate 32 are both made of a material with a high thermal conductivity, including but not limited to copper, aluminum and the like; so as to further improve the efficiency of heat conduction of the heat generated by the motor 1 to the outside.

[0081] Referring to Figure 5 , Figure 6 , Figure 7 As shown, in an embodiment of the present application, the top plate 31 comprises a first sub-plate body 311 coaxially sleeved on the driving shaft 11, the upper end of each flow guide pipe 5 is connected to the first sub-plate body 311; and a second sub-plate body 312 coaxially arranged outside the first sub-plate body 311, one end of the second sub-plate body 312 away from the first sub-plate body 311 is fixedly connected to the side plate 32, and the other end of the second sub-plate body 312 close to the first sub-plate body 311 is rotatably connected to the first sub-plate body 311; the inner periphery of the second sub-plate body 312 and the outer periphery of the first sub-plate body 311 are rotatably connected, thereby forming the structure of the top plate 31; as shown in Figure 9 , Figure 10 In this embodiment, the accommodating box 3 further comprises a rotating ring 33 rotatably installed on the bottom wall of the shell 2, in the axial direction of the motor 1, the rotating ring 33 penetrates the bottom wall of the shell 2, that is, the upper and lower ends of the rotating ring 33 respectively penetrate the upper and lower ends of the bottom wall of the shell 2; as preferred, in this embodiment, the upper and lower ends of the rotating ring 33 and the upper and lower ends of the bottom wall of the shell 2 are flush; the lower end of each flow guide pipe 5 is fixedly connected to the rotating ring 33, as shown in Figure 8 An air inlet 3111 in communication with the upper end of the flow guide pipe 5 is arranged on the first sub-plate body 311, as shown in Figure 9 An air outlet 332 in communication with the lower end of the flow guide pipe 5 is arranged on the rotating ring 33; in this way, the cold air flow in the air supply cavity 21 first enters the flow guide pipe 5 through the air inlet 3111 arranged on the first sub-plate body 311, and then is discharged outward from the air outlet 332 arranged on the rotating ring 33 after flowing through the flow guide pipe 5, thereby realizing the effect that the cold air flow flows through the flow guide pipe 5 from the air supply cavity 21, and is discharged outward after heat exchange with the air with a higher temperature in the accommodating box 3 in the flow guide pipe 5.

[0082] In the embodiment, the first sub-plate body 311 is sleeved on the driving shaft 11 of the motor 1, when the motor 1 works, the first sub-plate body 311 is driven to rotate synchronously, and then the plurality of flow guide pipes 5 and the rotating ring 33 are driven to rotate. In the embodiment, the flow guide pipe 5 is a metal structure, which has sufficient rigidity for the rotating ring 33 to rotate synchronously, and the flow guide pipe 5 is made of metal (such as copper, which has high heat conduction coefficient), so that the heat exchange efficiency between the cold air flow in the flow guide pipe 5 and the hot air in the containing box 3 is improved. The plurality of flow guide pipes 5 rotate in the first space 34 between the periphery of the motor 1 and the inner side wall of the containing box 3, so that the cold air flow in the flow guide pipe 5 can better contact with the hot air in the containing box 3, thereby generating heat exchange with the hot air in a larger range, and the cooling efficiency of the motor 1 is improved. Compared with the fixed arrangement of the flow guide pipe 5, the cold air flow in the flow guide pipe 5 can only exchange heat with the hot air around the flow guide pipe 5. Obviously, the rotation of the plurality of flow guide pipes 5 in the containing box 3 can achieve higher cooling efficiency.

[0083] As shown in Figure 6 In the embodiment, the adjusting window can be arranged on the second sub-plate body 312 or the side plate 32 or the side plate 32 and the second sub-plate body 312, as long as the containing box 3 can be opened and the environment of the motor 1 can be communicated with the outside when the adjusting window is opened. As preferred, the adjusting window is arranged on the side plate 32 and the second sub-plate body 312, so that the communication range between the sealed environment in the containing box 3 and the outside environment is increased when the adjusting window is opened. For example, the cold air flow can directly enter the containing box 3 from the adjusting window on the second sub-plate body 312 and exchange heat with the motor 1. In the embodiment, a plurality of first air outlets 331 are arranged on the rotating ring 33 and penetrate the rotating ring 33. The first air outlets 331 are arranged staggered with the flow guide pipes 5. The plurality of first air outlets 331 are arranged to discharge the air flow outside the containing box 3 when the adjusting window on the second sub-plate body 312 is opened and the motor 1 is directly cooled.

[0084] When the adjusting window on the side plate 32 is opened, the environment in the containing box 3 directly contacts with the side wall of the shell 2, so that the heat in the containing box 3 can be directly dissipated and transmitted to the outside through the shell 2, thereby avoiding the heat to be further conducted through the side plate 32 and then dissipated and transmitted to the outside, improving the heat dissipation and transmission effect of the heat in the containing box 3, and further improving the cooling and heat dissipation efficiency of the motor 1 in the containing box 3.

[0085] In the present embodiment, as shown in Figure 8 , Figure 14 The flow guide pipe 5 includes an inclined pipe section 51 and a vertical pipe section 52, the inclined pipe section 51 is communicated with the air inlet 3111 on the first sub-plate body 311, and the vertical pipe section 52 is communicated with the air outlet 332 on the rotating ring 33. Since the upper end of the flow guide pipe 5 is connected to the first sub-plate body 311, the flow guide pipe 5 is arranged as the inclined pipe section 51 and the vertical pipe section 52, which can effectively reduce the size of the first sub-plate body 311 (i.e., reduce the diameter of the first sub-plate body 311), so that the radial dimension of the second sub-plate body 312 is as large as possible. In this way, when the partial adjustment window arranged on the second sub-plate body 312 is opened, more areas of the motor 1 body can be directly exposed to the range of the partially opened adjustment window on the second sub-plate body 312 in the axial direction of the motor 1, so that the cold air flow can contact more motor 1 bodies when directly cooling the motor 1, thereby improving the heat exchange efficiency and ultimately improving the cooling and heat dissipation effect of the motor 1.

[0086] Referring to Figure 6 , Figure 7 In an embodiment of the present application, the adjustment window includes a first hole 321 arranged on the side plate 32, which penetrates the side plate 32 in the radial direction of the motor 1 and penetrates the side plate 32 in the axial direction of the motor 1; and a second hole 3121 arranged on the second sub-plate body 312, which penetrates the outer circumferential side of the second sub-plate body 312 in the radial direction of the motor 1 and penetrates the second sub-plate body 312 in the axial direction of the motor 1. In the present embodiment, the second hole 3121 can penetrate the entire second sub-plate body 312 or only a part of the second sub-plate body 312 (but must penetrate the outer circumferential side of the second sub-plate body 312) in the radial direction of the motor 1, and the first hole 321 can penetrate the entire side plate 32 or only a part of the side plate 32 (but must penetrate the end of the side wall close to the second sub-plate body 312) in the axial direction of the motor 1. When the second hole 3121 penetrates the entire second sub-plate body 312 and the first hole 321 penetrates the entire side plate 32, the contact area between the environment in the containing box 3 and the outside environment can be increased when the adjustment window is opened, thereby improving the heat exchange efficiency. However, the structural strength of the containing box 3 as a whole may be affected. When the second hole 3121 only penetrates a part of the second sub-plate body 312 and the first hole 321 only penetrates a part of the side plate 32, the containing box 3 can maintain a certain structural strength, but the contact area between the environment in the containing box 3 and the outside environment may be relatively reduced when the adjustment window is opened, which may affect the heat exchange efficiency. Those skilled in the art can choose a suitable arrangement mode according to actual needs when implementing the present solution.

[0087] In the radial direction of the motor 1, the first hole 321 and the second hole 3121 are located correspondingly and form a first adjusting hole; the adjusting plate 35 is movably connected to the accommodating box 3 along the circumferential direction of the accommodating box 3, as shown in the figure. Figure 6 As shown in the figure, specifically, the adjusting plate 35 includes a first plate 351 and a second plate 352 connected together, wherein the first plate 351 is horizontally arranged and is slidingly assembled in the second sub-plate body 312, and the second plate 352 is vertically arranged and is slidingly assembled in the side plate 32 (the shape of the second plate 352 is matched with the shape of the side plate 32, so that the second plate 352 can move in the side plate 32); for example, a sliding cavity for accommodating the first plate 351 and the second plate 352 is respectively arranged in the second sub-plate body 312 and the side plate 32, and the sliding cavity in the second sub-plate body 312 is communicated with the sliding cavity in the side plate 32, so that the adjusting plate 35 composed of the first plate 351 and the second plate 352 can move in the side plate 32 and the second sub-plate body 312 towards the first adjusting hole (so that the adjusting plate 35 is in a closed position) and close the first adjusting hole; or can move from the first adjusting hole to the second sub-plate body 312 and the side plate 32 (so that the adjusting plate 35 is in an open position) and open the first adjusting hole.

[0088] For example, in the embodiment, the side plate 32 and the second sub-plate body 312 can be integrally arranged or separately arranged, when the side plate 32 and the second sub-plate body 312 are integrally arranged, the sliding cavities can be directly punched on the above-mentioned integral structure; when the side plate 32 and the second sub-plate body 312 are separately arranged, the two can be connected by welding or fasteners, at this time, the above-mentioned sliding cavities need to be respectively arranged on the side plate 32 and the second sub-plate body 312, and when the side plate 32 and the second sub-plate body 312 are assembled, the two sliding cavities are communicated; as preferred, the side plate 32 and the second sub-plate body 312 are integrally arranged in the embodiment, thereby reducing the processing difficulty of the parts and reducing the use of spare parts.

[0089] For example, in the embodiment, as shown in the figure, Figure 6 , Figure 7 two adjusting plates 35 can be arranged in the same first adjusting hole, or one adjusting plate 35 can be arranged in the same first adjusting hole; when two adjusting plates 35 are arranged in the same first adjusting hole, at this time, sliding cavities need to be respectively arranged on the side walls of the side plate 32 and the second sub-plate body 312 located on both sides of the first adjusting hole, when the first adjusting hole needs to be closed, the two adjusting plates 35 are respectively slid out of the corresponding sliding cavities and move towards each other, so that the two adjusting plates 35 abut on one side when the first adjusting hole is closed; when one adjusting plate 35 is arranged in the same first adjusting hole, at this time, only a sliding cavity needs to be arranged on the side wall of the second sub-plate body 312 and the side plate 32 located on one side of the first adjusting hole, and the specific operation mode is the same as above, which will not be described in detail here.

[0090] For example, the embodiment provides a specific way for driving the adjusting plate 35 to move between the open position and the closed position. The adjusting plate 35 and the sliding cavity are connected by an elastic member (e.g., a spring), an electromagnetic driving member (e.g., an electromagnet) is arranged in the sliding cavity, and a structure member that is easily magnetically attracted is arranged on the side of the adjusting plate 35 facing the electromagnetic driving member. When the adjusting plate 35 is in the open position, the elastic member is in a compressed state. When the adjusting window needs to be opened, the electromagnetic driving member is powered to generate an electromagnetic force, which attracts the adjusting plate 35 to move the adjusting plate 35 from the closed position to the open position (compressing the elastic member). When the adjusting window needs to be closed, the electromagnetic driving member is de-energized to lose the electromagnetic force, so that the adjusting plate 35 moves from the open position to the closed position under the elastic force of the elastic member. The above embodiment is only one of the embodiments that can drive the adjusting plate 35 to directly move between the open position and the closed position. Any other structure that can achieve the above method can be used to drive the adjusting plate 35 to move between the open position and the closed position in the embodiment.

[0091] In the embodiment, as shown in Figure 6 , Figure 14 When the adjusting window is in the open position, the first adjusting hole is in an open state, and the cold air flow from the air supply cavity 21 directly flows through the surface of the motor 1 and directly cools and dissipates heat for the motor 1. At the same time, the plurality of flow guide pipes 5 rotate at a high speed synchronously with the driving shaft 11. With the high-speed rotation of the flow guide pipes 5 and the cooperation between the inclined pipe section 51 and the straight pipe section 52, the hot air in the first space 34 and in the region (i.e., the b region shown in Figure 6 ) offset from the first adjusting hole is pushed to the position of the first adjusting hole (i.e., the c region shown in Figure 6 ). After mixing and contacting with the cold air flow flowing through the first adjusting hole (heat exchange is generated), the partially heat-exchanged air flows downward together with the cold air flow and is finally discharged to the outside environment. Since part of the hot air in the first space 34 and in the region (i.e., the b region shown in Figure 6 ) offset from the first adjusting hole is pushed to the first adjusting hole and is taken away by the air flow flowing downward at a high speed and is discharged to the outside, it is necessary to note that: when the adjusting window is in the closed position, the first adjusting hole is in a closed state, and the cold air flow from the air supply cavity 21 is directly discharged to the outside environment without flowing through the surface of the motor 1. Figure 6When the hot air in the b area shown in the figure moves to the c area under the push of the flow guide pipe 5 (assuming that the rotation direction of the flow guide pipe 5 is counterclockwise rotation), the air pressure in the b area is reduced and a certain degree of negative pressure is generated, and under the action of the air pressure difference, the air flow in the a area (cold air) flows quickly into the b area, thereby achieving the effect of replacing the hot air in the b area (the area where the cold air flow cannot flow from top to bottom) with cold air, and providing the motor 1 with a more efficient cooling and heat dissipation effect.

[0092] Referring to Figure 10 , Figure 11 In an embodiment of the present application, the peripheral side of the containing box 3 is spaced apart from the inner wall of the shell 2 in the radial direction of the motor 1, so that the space between the peripheral side of the containing box 3 and the inner wall of the shell 2 forms a second space 23 that communicates with the air supply cavity 21; a plurality of second air outlet holes 24 are provided on the bottom wall of the shell 2 corresponding to the second space 23 in the axial direction of the motor 1; thus, when the motor 1 is indirectly cooled and heat-dissipated, the cold air flow moving from the air supply cavity 21 flows through the containing box 3 through the flow guide pipes 5, thereby achieving the effect of cooling and heat-dissipating the environment in the containing box 3; at the same time, part of the cold air flow also flows from the second space 23, i.e. from the peripheral side of the containing box 3, thereby further improving the heat exchange efficiency between the cold air flow and the gas with higher temperature in the containing box 3, and thereby improving the cooling and heat-dissipating effect of the motor 1; the cold air flow flowing from the second space 23 is finally discharged to the outside environment through the second air outlet holes 24 on the bottom wall of the shell 2.

[0093] For example, in the present embodiment, as shown in Figure 12 , a protective plate 26 can be additionally provided below the bottom wall of the shell 2, and the protective plate 26 and the bottom wall of the shell 2 are spaced apart by a certain distance, the peripheral side of the protective plate 26 is fixedly connected to the shell 2, and an annular cylinder (not shown in the figure) is upwardly protruded at a position close to the center of the protective plate 26, and the upper end of the annular cylinder is fixedly connected to the bottom wall of the shell 2. The protective plate 26 and the annular cylinder are provided for the following purposes: on the one hand, to provide a layer of isolation barrier between the rotating ring 33 and the outside environment, so as to avoid safety accidents caused by touching the high-speed rotating rotating ring 33 by the user; on the other hand, to achieve the effect of supporting part of the bottom wall of the shell 2 through the protective plate 26 and the annular cylinder, because part of the shell 2 inside the rotating ring 33 and other parts of the shell 2 are divided by the rotating ring, it is necessary to additionally provide a structure for supporting the part of the shell 2 inside the rotating ring 33, and in the present embodiment, the protective plate 26 and the annular cylinder achieve the effect of supporting the part of the shell 2 inside the rotating ring 33.

[0094] Due to the arrangement of the protection plate 26, it is necessary to arrange holes on the protection plate 26 for discharging the hot air flow, and therefore a plurality of third air outlet holes 261 are arranged on the protection plate 26 in a spaced manner around the annular cylinder, for realizing further discharging the air flow discharged from the shell 2 to the external environment through the plurality of third air outlet holes 261.

[0095] Referring to Figure 12 Fig. 6, in an embodiment of the present application, the driving shaft 11 extends downward from one end of the blade 115 away from the shell 2, that is, extends downward from the bottom wall of the shell 2, and is arranged in the annular cylinder shown in Figure 12 Fig. 7 (the lower end of the annular cylinder has an opening 111 in communication with the external environment, so that the space in the annular cylinder is in communication with the external environment), and at this time the lower end of the driving shaft 11 is exposed to the external environment; as Figure 6 , Figure 7 , Figure 8 shown, a plurality of openings 111 are arranged on the circumferential position of the part of the driving shaft 11 located in the air supply cavity 21, and the plurality of openings 111 are arranged in a spaced manner; in this embodiment, too many openings 111 will cause the overall rigidity of the driving shaft 11 to decrease, and too few openings 111 will make it difficult to achieve a better cooling and heat dissipation effect; as preferred, three openings 111 are arranged in this embodiment, and the three openings 111 are arranged in a spaced equidistant manner on the circumferential position of the driving shaft 11; as Figure 12 , Figure 16 shown, a flow channel 112 is arranged in the driving shaft 11, each opening 111 corresponds to one flow channel 112, the upper end of the flow channel 112 is in communication with the opening 111, and the lower end of the flow channel 112 penetrates the driving shaft 11 downward.

[0096] In the embodiment, by setting the matching openings 111 and flow channels 112 on the drive shaft 11, part of the cold air flow located in the air supply cavity 21 can enter the flow channels 112 through the openings 111 and flow through the flow channels 112, so that the cold air flow can directly cool and dissipate heat for the inside of the motor 1 during the movement in the flow channels 112. Since the drive shaft 11 is located at the most core position of the motor 1, the temperature at this position is usually high, and the cold air flow directly flows through the flow channels 112 in the drive shaft 11, which can achieve a more efficient cooling effect for the motor 1. During the flow of the cold air flow in the flow channels 112, dust carried by the cold air flow will inevitably enter the flow channels 112 and adhere to the inner walls of the flow channels 112 over a long period of time, thereby affecting the heat exchange efficiency. Since the bottom ends of the flow channels 112 all penetrate the drive shaft 11 and are in communication with the outside environment, and the bottom of the drive shaft 11 extends downward out of the shell 2, the user can regularly clean the dust adhered to the inner walls of the flow channels 112. For example, a rod-shaped member (the cross-sectional size of the rod is slightly smaller than the cross-sectional size of the flow channel) wrapped with a layer of cleaning cotton on the peripheral side can be used. The user inserts the rod-shaped member wrapped with the cleaning cotton into the flow channel 112 from bottom to top, and the cleaning cotton contacts and rubs against the inner walls of the flow channel 112, thereby cleaning the dust adhered to the inner walls of the flow channel 112. The cleaning of the inner walls of the flow channel 112 in the above process does not require disassembly of the shell 2, and the operation is simple and convenient.

[0097] Referring to Figure 6 , Figure 7 , Figure 8 , Figure 16 In an embodiment of the present application, the handheld multi-mode electric grabber 100 further includes a sealing member 6 movably arranged in the opening 111. The sealing member 6 has an unfolded position and a folded position. In the embodiment, the bottom of the sealing member 6 is rotatably installed on the opposite two side walls of the opening 111, and the peripheral side of the sealing member 6 is adapted to the shape of the drive shaft 11. When the sealing member 6 is in the folded position, the outer peripheral contour of the sealing member 6 matches the outer peripheral contour of the drive shaft 11 and seals the opening 111. Since a plurality of openings 111 are arranged on the peripheral side of the drive shaft 11, the arrangement of the openings 111 destroys the integrity of the surface of the drive shaft 11, so that when the drive shaft 11 rotates at high speed, turbulent flow or turbulent flow will be formed at the openings 111, thereby increasing the noise generated when the motor 1 works. Therefore, when the temperature of the motor 1 is still in a lower range interval, the opening 111 can be sealed by the sealing member 6, so that the drive shaft 11 at the position of the opening 111 can be a complete arc surface. In this way, when the drive shaft 11 rotates at high speed, no turbulent flow or turbulent flow will be generated at the opening 111, thereby reducing the noise generated when the motor 1 works.

[0098] In the embodiment, when the temperature of the motor 1 continues to rise, at this time, the cooling of the motor 1 has become more urgent (the noise of the motor 1 is not the primary consideration), in order to further improve the cooling efficiency of the motor 1 in the indirect cooling mode, the above sealing can be moved from the folding position to the unfolding position, thereby opening the opening 111, so that the cold air in the air supply cavity 21 flows into the flow channel 112 through the opening 111, and exchanges heat with the most core area inside the motor 1 during movement in the flow channel 112, thereby improving the cooling efficiency of the motor 1.

[0099] The sealing member 6 in the embodiment is in the unfolding position, and can also play a certain degree of flow guiding effect on the airflow in the air supply cavity 21. The airflow in the air supply cavity 21 moves from top to bottom under the action of the blade 115, and when it moves to the sealing member 6 in the unfolding position, the airflow is blocked by the sealing member 6 and moves along the inclined surface of the sealing member 6 body towards the opening 111. For example, in order to further improve the guiding effect of the airflow when the sealing member 6 is in the unfolding position, a flow guide groove can be provided on the side of the sealing member 6 towards the axial center line of the drive shaft 11, and the bottom wall opposite to the outer circumferential side of the sealing member 6 is provided as an inclined surface. In this way, as shown in the figure, when the cold airflow in the air supply cavity 21 moves rapidly from top to bottom and moves to the position of the sealing member 6, the airflow enters the flow guide groove and is guided into the opening 111 under the action of the inclined bottom wall of the flow guide groove, and finally enters the flow channel 112 through the opening 111, for heat exchange with the core area of the motor 1. Figure 8

[0100] In the embodiment, when the temperature of the motor 1 continues to rise, the sealing member 6 has been moved from the folding position to the unfolding position, and the opening 111 is in the open state. In order to further improve the flow rate of the airflow through the flow guide pipe 5 and the flow channel 112 in the drive shaft 11, the flow rate of the cold airflow in the second space 23 can be reduced or the second space 23 can be closed to prevent the cold airflow from passing through the second space 23. At this time, the second space 23 is located farthest from the core area of the motor 1 relative to the flow guide pipe 5 and the flow channel 112, and the cooling efficiency of the cold airflow passing through the second space 23 is obviously lower than that of the cold airflow passing through the flow guide pipe 5 and the flow channel 112. Therefore, under the condition that the rotating speed of the blade 115 is constant (the air volume is constant), closing the second space 23 can make the cold airflow pass through the flow guide pipe 5 and the flow channel 112, thereby increasing the cooling efficiency of the motor 1.

[0101] Based on the above, the embodiment provides a structure for achieving the above effects; as shown in the figure, Figure 11 , Figure 12 , Figure 13 ​As shown, an annular plate 25 is arranged between the outer periphery of the containing box 3 and the inner side wall of the shell 2, and the annular plate 25 is fixedly installed on the inner side wall of the shell 2, and the end of the annular plate 25 away from the inner side wall of the shell 2 is in abutting contact with the outer periphery of the side plate 32, and a rotating cavity 251 is arranged in the annular plate 25; a regulating ring 4 is coaxially and rotatably installed in the rotating cavity 251, a plurality of second adjusting holes 41 are arranged through the regulating ring 4 and are equidistantly distributed between the second adjusting holes 41, and a plurality of fixing holes 252 are also arranged on the annular plate 25, the size of the fixing holes 252 is consistent with the size of the second adjusting holes 41, and the arrangement positions of the fixing holes 252 are matched with the arrangement positions of the second adjusting holes 41, so that when the regulating ring 4 is in a certain state, the fixing holes 252 and the second adjusting holes 41 are one-to-one corresponding and in communication, at this time, the cold air flow in the air supply cavity 21 enters the second space 23 downward through the one-to-one corresponding fixing holes 252 and second adjusting holes 41, for heat exchange with the hot air in the containing box 3 and heat dissipation; after the regulating ring 4 is rotated by a predetermined angle, the fixing holes 252 and the second adjusting holes 41 are staggered, at this time, the positions of the fixing holes 252 on the annular plate 25 correspond to the positions of the second adjusting holes 41 on the regulating ring 4, so as to block the fixing holes 252 on the annular plate 25, and prevent the cold air flow from entering the second space 23 from the air supply cavity 21.

[0102] When the temperature of the motor 1 is at a low level, the second adjusting holes 41 on the regulating ring 4 correspond to the fixing holes 252 on the annular plate 25 one-to-one and are in communication, so that the cold air flow in the air supply cavity 21 can enter the second space 23; when the temperature of the motor 1 continues to rise, at this time, the sealing element 6 is in the open position, in order to increase the flow of the cold air flow in the flow guide pipe 5 and the flow channel 112, the regulating ring 4 is driven to rotate by a predetermined angle, so that the fixing holes 252 and the second adjusting holes 41 are staggered, so as to block the fixing holes 252 on the annular plate 25 by the regulating ring 4, so that the second space 23 is no longer in communication with the air supply cavity 21, at this time, all the cold air flow in the air supply cavity 21 moves through the plurality of flow guide pipes 5 and flow channels 112 respectively, so as to realize the heat exchange effect, and since the flow of the cold air flow in the flow guide pipe 5 and the flow channel 112 is increased, the cooling and heat dissipation efficiency of the motor 1 is improved.

[0103] For example, the embodiment provides a structure for driving the regulating ring 4 to rotate in the annular plate 25, as shown in Figure 13As shown, the outer periphery of the adjusting ring 4 is uniformly provided with a gear train 42, in the axial direction of the adjusting ring 4, the projection of the gear train 42 does not protrude from the projection of the adjusting ring 4, the adjusting gear 43 engaged with the gear train 42 is rotatably installed on the outer side wall of the shell 2, the adjusting ring 4 is driven to rotate relative to the annular plate 25 by rotating the adjusting gear 43, thereby controlling the conduction or isolation between the second space 23 and the air supply cavity 21; as for how to drive the adjusting gear 43 to rotate, manual screwing can be used, or direct driving by a micro motor can be used, in specific implementation, the corresponding setting mode can be taken according to the needs; it is worth noting that: because the electric pick 100 will generate a large vibration when working, in order to avoid the adjusting ring 4 from being misrotated when subjected to vibration, when the manual screwing mode is adopted to drive the adjusting gear 43 to rotate, a locking structure (such as a latch) for positioning the adjusting gear 43 can be provided on the outer side wall of the shell 2; when the micro motor is directly used to drive the adjusting gear 43 to rotate, the micro motor should have an electromagnetic brake, so that when the micro motor is not working, the micro motor shaft can be locked by the electromagnetic brake, and then the adjusting ring 4 is locked and positioned.

[0104] Referring to Figure 7 , Figure 8 , Figure 9 , Figure 10 , Figure 16 As shown, in an embodiment of the present application, the handheld multi-mode electric pick 100 further comprises a drive rod 8 coaxially arranged in the drive shaft 11, the lower end of the drive rod 8 at least partially extends out of the drive shaft 11, and the lower end of the drive rod 8 is threadedly connected to the shell 2, for example, the bottom periphery of the drive rod 8 is provided with external threads, and the inner side wall of the annular cylinder coaxially connected with the protective plate 26 is provided with a support rod (such as Figure 1 , Figure 12 As shown) for threadedly mounted with the external threads of the bottom of the drive rod 8, by rotating the drive rod 8, the drive rod 8 can be driven to move up and down in the drive shaft 11.

[0105] As Figure 16As shown, a hole 113 is coaxially arranged in the driving shaft 11 (the hole 113 penetrates the bottom wall of the driving shaft 11 downward, so that the driving rod 8 can extend outward from the bottom of the driving shaft 11 to the external environment), a plurality of flow channels 112 are arranged outside the hole 113 and are equidistantly distributed around the hole 113; the inner diameter of the hole 113 is slightly larger than the outer diameter of the driving rod 8, so that the driving rod 8 can move along the axial direction of the motor 1 in the hole 113 (if the inner diameter of the hole 113 is the same as the outer diameter of the driving rod 8, unnecessary wear will occur between the driving rod 8 and the inner wall of the hole 113); the second bearing 81 is arranged on the side of the relative position of the driving rod 8 and the opening 111, that is, the inner ring of the second bearing 81 is fixed to the outer periphery of the driving rod 8, so that when the sealing element 6 rotates at high speed with the driving shaft 11, the outer ring of the second bearing 81 can be driven to rotate synchronously relative to the inner ring through the connecting rod 82, so that the driving rod 8 is not driven to rotate; one end of the connecting rod 82 is rotatably installed on the outer ring of the second bearing 81, and the other end of the connecting rod 82 is rotatably installed on the sealing element 6 (for example, rotatably installed on the bottom wall of the flow guide groove).

[0106] In this embodiment, when it is necessary to open the opening 111, the driving rod 8 is rotated and then driven to move upward in the hole 113, so that the sealing element 6 is driven to move from the folding position to the unfolding position through the cooperation of the second bearing 81 and the connecting rod 82; when it is necessary to close the opening 111, the driving rod 8 is rotated in the opposite direction and then driven to move downward in the hole 113, so that the sealing element 6 is driven to move from the unfolding position to the folding position through the cooperation of the second bearing 81 and the connecting rod 82.

[0107] For example, in this embodiment, the power for driving the driving rod 8 to rotate can be manually driven by artificial manual method, or can be driven by a micro motor (this method will increase the cost of the electric grab 100), and in specific implementation, the corresponding driving method can be adopted according to actual needs; since the electric grab 100 will generate great vibration during work, in order to avoid the driving rod 8 from being mis-rotated due to vibration, when the driving rod 8 is driven to rotate by artificial screwing, a locking structure (such as a latch) for positioning the driving rod 8 can be arranged on the bottom wall of the shell 2; when the driving rod 8 is directly driven to rotate by a micro motor, the micro motor should have an electromagnetic brake, so that when the micro motor is not working, the rotating shaft of the micro motor can be locked by the electromagnetic brake, and then the driving rod 8 is locked and positioned.

[0108] Referring to Figure 17As shown, in an embodiment of the present application, the drive rod 8 is a metal structural member, such as copper material; and the drive rod 8 has a lumen 83, and the inner wall of the lumen 83 is attached with a liquid absorbing core 84, wherein the liquid absorbing core 84 is a metal sponge, which is used to absorb and store a certain amount of low-boiling-point liquid, including but not limited to distilled water, freon, etc.; the side of the liquid absorbing core 84 away from the inner wall of the lumen 83 is formed with an air channel 831, and the inside of the lumen 83 is a vacuum environment, and the degree of vacuum in the lumen 83 is not limited in this embodiment, as long as it is in a certain degree of negative pressure environment.

[0109] As Figure 10 shown, since the bottom end of the drive rod 8 protrudes outwardly from the shell 2 and is placed in the external environment, the part of the drive rod 8 protruding outwardly from the shell 2 is a cold section B (since the cold section A is in the drive shaft 11, the environmental temperature is higher than that of the cold section B, so that the cold section B becomes the main area for cooling and cooling the hot section), and the part of the drive rod 8 penetrating into the motor 1 is a hot section; in this way, when the motor 1 starts to work, heat is generated inside and the temperature of the drive shaft 11 rises synchronously, and the low-boiling-point liquid in the hot section is affected by high temperature and vaporizes (causing the amount of low-boiling-point liquid absorbed in the liquid absorbing core 84 in the hot section to decrease), which in turn causes the air pressure in the hot section of the drive rod 8 to increase, and the air pressure in the cold section B is smaller, so that the steam generated in the hot section moves along the air channel 831 in the drive rod 8 towards the cold section B, and when it moves to the cold section B, the steam releases heat (that is, heat is dissipated to the outside) and condenses, so that it is condensed into liquid again, and the condensed liquid returns to the hot section under the action of the liquid absorbing core 84 (because the amount of low-boiling-point liquid absorbed and stored by the liquid absorbing core 84 in the hot section and the cold section B is different, in order to maintain balance, the low-boiling-point liquid condensed in the cold section B will flow back to the hot section along the liquid absorbing core 84); and the low-boiling-point liquid flowing back to the hot section absorbs heat in the core area of the motor again, and the above process is repeated, that is, the heat in the hot section is transferred to the cold section B, and finally dissipated to the outside, thereby achieving efficient cooling and heat dissipation of the core area in the motor 1; it should be noted that if manual screwing is used to drive the drive rod 8 to move up and down in the drive shaft 11, a heat-insulating handle needs to be provided on the end of the drive rod 8 protruding outwardly from the drive shaft 11, so as to avoid the heat absorbed by the cold section B from the hot section causing burns to the user's hand.

[0110] In this embodiment, as Figure 6 , Figure 7 , Figure 8 , Figure 16As shown, a heat exchange port 114 is provided on the drive shaft 11 and above the opening 111, and the heat exchange port 114 is connected to the channel 113 coaxially located inside the drive shaft 11; the heat exchange port 114 and the opening 111 are staggered in the circumferential direction of the drive shaft 11. On the one hand, this avoids the continuous opening of holes in the axial position of the drive shaft 11, and avoids the reduction of the overall structural strength of the drive shaft 11 due to the opening of the opening 111 and the heat exchange port 114; on the other hand, when the temperature of the motor 1 further rises and drives the drive rod 8 to move upward inside the drive shaft 11, driving the seal 6 to move from the retracted position to the unfolded position, at this time the upper end of the drive rod 8 (that is, the upper end of the drive rod 8) Figure 17 The cold section A shown in the diagram moves to the position corresponding to the heat exchange port 114. At this time, the rapidly flowing cold air in the air supply cavity 21 can exchange heat with the heat in the cold section A of the drive rod 8 as it flows through the heat exchange opening 111 (e.g., Figure 16 As shown by the dashed arrow extending horizontally in the middle, this achieves the effect of cooling the area of ​​the drive rod 8 in the cold section A. By staggering the heat exchange port 114 and the opening 111, it is possible to better prevent the gas (carrying a certain amount of heat) flowing from top to bottom through the heat exchange port 114 and exchanging heat with the cold section A from entering the opening 111 under the guidance of the seal 6 when it moves downwards to the height of the opening 111. This prevents the gas from flowing back into the drive shaft 11 through the flow channel 112 connected to the opening 111, thus preventing the heat originally transferred from the drive shaft 11 from flowing back into the drive shaft 11. Therefore, the heat flowing through the heat exchange port 114 and interacting with the drive rod 8 is effectively cooled. When the gas that generates heat exchange in the cold section A of rod 8 flows downward to the first partition plate 311, it is blocked by the first partition plate 311 and diffuses in all directions. That is, the heat carried by this part of the airflow will move towards the peripheral edge of the motor 1 along with the diffused airflow. The temperature of the peripheral edge of the motor 1 is much lower than the temperature in the core area of ​​the motor 1 (the lower ambient temperature in the peripheral edge area of ​​the motor 1 will dilute the heat carried by this part of the airflow). Compared with the above heat flowing back into the drive shaft 11 with the airflow, it can better avoid the temperature of the core area of ​​the motor 1 from rising further and effectively alleviate the impact of high temperature on the motor 1.

[0111] Because the airflow discharged from the bottom of the flow channel 112 carries a lot of heat, the drive rod 8 extends outward from one end of the drive shaft 11, that is... Figure 17The cold section B shown in the middle is almost surrounded by the hot air stream flowing out of the flow channel 112 (at this time, the ambient temperature of the cold section B is also at a high level), which reduces the cooling capacity of the cold section B to a low level; however, the part of the driving rod 8 in the cold section A moves upward to the position corresponding to the heat exchange port 114, and the cold air stream in the air supply cavity 21 flows rapidly through the heat exchange port 114 from top to bottom of the flow channel 112 and realizes high-efficiency heat exchange with the cold section A, so that the cold section A at this time becomes the main area for cooling the hot section; that is, the cold air stream flowing through the flow channel 112 and the cold section A together realize the effect of high-efficiency cooling of the core area of the motor 1.

[0112] For example, in the present embodiment, as shown in Figure 16 , it is set that when the sealing member 6 is in the retracted position, the upper end of the driving rod 8 is in the position shown in the left side view of Figure 16 , that is, the upper end of the driving rod 8 is almost flush with the bottom of the heat exchange port 114, and in the axial direction of the driving shaft 11, the height of the heat exchange port 114 is consistent with the distance of the driving rod 8 driving the sealing member 6 to move from the retracted position to the expanded position (therefore, the upper end of the hole 113 should also be consistent with the upper top wall of the heat exchange port 114), that is, when the driving rod 8 drives each sealing member 6 to move from the retracted position to the expanded position, the upper end of the driving rod 8 almost reaches the top wall position of the heat exchange port 114 (as shown in the right side view of Figure 16 ); the reason for the above setting is to avoid opening a long hole 113 and heat exchange port 114 in the axial direction of the driving shaft 11 as much as possible; because the longer the hole 113 and the heat exchange port 114 are opened, the greater the influence on the overall strength of the driving shaft 11 is, and the longer the hole 113 and the heat exchange port 114 are opened, the greater the proportion of the hollow part in the driving shaft 11, which reduces the overall structural strength of the driving shaft 11 and is not conducive to its operation under high strength.

[0113] In the embodiment, the length of the heat exchange port 114 is set to be consistent with the distance of the driving rod 8 moving upward, and the upper end of the hole 113 and the upper top wall of the heat exchange port 114 are kept flush, that is, when the driving rod 8 moves a preset distance to drive each sealing piece 6 to move from the folded position to the unfolded position, the cold section A of the driving rod 8 is in the area corresponding to the heat exchange port 114 as much as possible, thereby achieving high-efficiency heat exchange with the cold air flowing through the heat exchange port 114, realizing high-efficiency cooling and heat dissipation effect on the core area of the motor 1; at the same time, it avoids the situation that the length of the hole 113 and the heat exchange port 114 is too long, which reduces the overall structural strength of the driving shaft 11; if at the beginning, that is, when each sealing piece 6 is in the folded position, the upper end (cold section A) of the driving rod 8 is already in the position corresponding to the heat exchange port 114, when the subsequent driving of each sealing piece 6 from the folded position to the unfolded position is required, the driving rod 8 needs to continue to move upward, thereby, a longer hole 113 and heat exchange port 114 need to be provided in the driving shaft 11, which will greatly affect the overall structural strength of the driving shaft 11, and is not conducive to the long-term operation of the driving shaft 11 under high strength.

[0114] In a second aspect, the embodiment of the present application provides a control system, which adopts the handheld multi-mode electric grabber 100 in the above embodiment, comprising: a temperature sensor, which can be arranged in the motor 1 or the containing box 3, and is used to collect temperature information of the motor 1 or the environment around the motor 1; a driving member, which is used to drive the adjusting plate 35 to move between the open position and the closed position, and the specific structure of the driving member has been described in detail in the above embodiment, which will not be described here; and a central controller, which is electrically connected with the temperature sensor and the driving member, receives the temperature information of the motor 1 or the environment around the motor 1, and controls the driving member to drive the adjusting plate 35 to move between the open position and the closed position, so as to switch the cooling mode of the motor 1 between indirect cooling and direct cooling according to the change of the temperature of the motor 1.

[0115] For example, if the driving rod 8 and the adjusting ring 4 in the above embodiment are driven by a micro motor, the central controller can control the driving rod 8 to move up and down in the hole 113 (for driving the sealing piece 6 to switch between the folded position and the unfolded position), and control the adjusting gear 43 to rotate, thereby realizing the rotation of the adjusting ring 4 in the ring-shaped plate 25 (realizing the conduction or isolation between the second space 23 and the air supply cavity 21).

[0116] The application effectively realizes efficient cooling and dust protection of the motor 1 by adopting a multi-level heat dissipation structure and an intelligent control mode, dust is effectively blocked from directly invading by using the containing box 3 to isolate the outside to form a closed heat dissipation cavity, meanwhile, a plurality of flow guide pipes 5 and flow channels 112 are arranged inside to make the cold air flow quickly take away the heat generated by the motor 1 after heat exchange, the inclined pipe section 51 and the straight pipe section 52 in the flow guide pipe 5 are designed, which not only reduces the structure size but also increases the heat exchange area, so that the requirements of low temperature and low noise operation can be met in the indirect heat dissipation mode, when the temperature of the motor 1 rises, the automatic opening adjustment window is used to realize the direct heat dissipation mode, so that the cold air flow directly acts on the surface of the motor 1 to further accelerate the heat release, the flow channel 112 arranged in the driving shaft 11 is designed to make the cold air flow directly reach the core area of the motor, effectively reduce the temperature rise, meanwhile, the sealing element 6 is used to close the opening hole at low temperature to prevent noise, and at high temperature, the sealing element 6 is unfolded to guide the cold air flow into the flow channel 112 to realize efficient heat exchange, effectively avoiding the phenomenon of automatic shutdown of the motor due to overheating, so that the entire electric tool shows excellent heat dissipation performance and dustproof effect in long time and high load operation.

[0117] The above is only the preferred embodiment of the present application, it should be noted that for those skilled in the art, without departing from the technical principles of the present application, a number of improvements and replacements can be made, which should be considered as the protection scope of the present application.

Claims

1. A hand-held multi-mode electric pick, comprising an electric motor (1), a transmission assembly (9) and a percussion assembly (10), the hand-held multi-mode electric pick having a hammering mode and a hammer drilling mode, characterized in that, The utility model relates to a kind of air supply device, including: Shell (2), the motor (1), the transmission assembly (9), the impact assembly (10) are housed in the shell (2); Accommodation box (3) is arranged in the shell (2), the motor (1) is housed in the accommodation box (3), in the radial direction of the motor (1), the outer periphery of the motor (1) is spaced apart from the inner side wall of the accommodation box (3), to make the interval between the first space (34) between them; Blade (115), coaxially sleeve is fixed to the drive shaft (11) of the motor (1), the blade (115) is spaced apart and located above the accommodation box (3), so that the blade (115) and the accommodation box (3) form air supply cavity (21) between them; Flow guide pipe (5) is arranged in the first space (34), the flow guide pipe (5) has a plurality of, a plurality of the flow guide pipe (5) is spaced apart and distributed in the first space (34) around the axial direction of the drive shaft (11);In the axial direction of the motor (1), one end of each of the flow guide pipe (5) is communicated with the air supply cavity (21), and the other end is communicated with the outside world; Adjusting window, provided with a plurality of, a plurality of the adjusting window is spaced apart and distributed on the circumferential side wall of the accommodation box (3) around the drive shaft (11);The adjusting window has opening position, closed position, the adjusting window is in the opening position, so that the first space (34) is communicated with the outside world and the air supply cavity (21);The adjusting window is in the closed position, for sealing the accommodation box (3);And Air supply port (22) is arranged on the side wall of the shell (2), and the air supply port (22) is located above the blade (115).

2. The hand-held multi-mode electro-shovel of claim 1, wherein, The accommodation box (3) includes top plate (31), and the drive shaft (11) penetrates the top plate (31) from bottom to top;And Side plate (32), in the axial direction of the motor (1), one end of the side plate (32) is connected to the bottom wall of the top plate (31), and the other end is fixedly abutted to the bottom wall of the shell (2).

3. The hand-held multi-mode electro-shovel of claim 2, wherein, The top plate (31) includes first sub-plate body (311), the first sub-plate body (311) is coaxially sleeved on the drive shaft (11);The upper end of each flow guide pipe (5) is connected to the first sub-plate body (311);And Second sub-plate body (312) is arranged coaxially on the outer side of the first sub-plate body (311), one end of the second sub-plate body (312) away from the first sub-plate body (311) is fixedly connected to the side plate (32), and one end of the second sub-plate body (312) close to the first sub-plate body (311) is rotatably connected with the first sub-plate body (311) circumferentially; The accommodation box (3) further includes a swivel ring (33), and the swivel ring (33) is rotatably arranged coaxially on the bottom wall of the shell (2);In the axial direction of the motor (1), the swivel ring (33) penetrates the bottom wall of the shell (2), and the lower end of each flow guide pipe (5) is connected to the swivel ring (33);A plurality of first air outlet holes (331) are arranged through the swivel ring (33); The adjusting window is arranged on the second sub-plate body (312) and / or the side plate (32).

4. The hand-held multi-mode electro-shovel of claim 3, wherein, The adjusting window comprises a first hole (321) arranged on the side plate (32), the first hole (321) penetrates the side plate (32) in the radial direction of the motor (1) and penetrates the side plate (32) in the axial direction of the motor (1); and A second hole (3121) is arranged on the second sub-plate body (312), the second hole (3121) penetrates the outer circumferential side of the second sub-plate body (312) in the radial direction of the motor (1) and penetrates the second sub-plate body (312) in the axial direction of the motor (1); the first hole (321) and the second hole (3121) are located in correspondence in the radial direction of the motor (1) and form a first adjusting hole; An adjusting plate (35) is movably connected to the accommodating box (3) in the circumferential direction of the accommodating box (3), the adjusting plate (35) has an open position and a closed position, the adjusting plate (35) is accommodated in the side plate (32) and the second sub-plate body (312), so that the adjusting plate (35) is in the open position and the first adjusting hole is opened; the adjusting plate (35) is located in the first adjusting hole, so that the adjusting plate (35) is in the closed position and the first adjusting hole is sealed.

5. The hand-held multi-mode electro-shovel of claim 4, wherein, In the radial direction of the motor (1), the circumferential side of the accommodating box (3) is arranged in a spaced manner with the inner wall of the shell (2), so that the space between the circumferential side of the accommodating box (3) and the inner wall of the shell (2) forms a second space (23) in communication with the air supply cavity (21); In the axial direction of the motor (1), a plurality of second air outlet holes (24) are arranged in the bottom wall of the shell (2) corresponding to the second space (23).

6. The hand-held multi-mode electro-hammer according to any of claims 1-5, characterized in that, The driving shaft (11) extends downward out of the shell (2) from the end away from the blade (115); The circumferential side of the driving shaft (11) located in the air supply cavity (21) has a plurality of openings (111), and a plurality of the openings (111) are arranged in a spaced manner in the axial direction of the motor (1); the driving shaft (11) is provided with flow channels (112) corresponding to the openings (111), and the flow channels (112) extend in the axial direction of the motor (1); In the axial direction of the motor (1), the upper end of the flow channel (112) is in communication with the opening (111), and the lower end of the flow channel (112) penetrates the driving shaft (11) downward.

7. The hand-held multi-mode electro-shovel of claim 6 wherein, The handheld multi-mode electric grabber further comprises a sealing member (6) movably arranged in the opening (111), and the sealing member (6) has an unfolded position and a folded position; When the sealing member (6) is in the unfolded position, the opening (111) is opened, and the sealing member (6) is used to introduce airflow into the opening (111) and into the flow channel (112); when the sealing member (6) is in the folded position, the opening (111) is sealed; when the sealing member (6) is in the folded position, the outer peripheral contour of the sealing member (6) matches the outer peripheral contour of the driving shaft (11).

8. The hand-held multi-mode electro-shovel of claim 7, wherein, The hand-held multi-mode electric pick also comprises a driving rod (8) coaxially arranged in the driving shaft (11), the lower end of the driving rod (8) at least partially extends out of the driving shaft (11), and the lower end of the driving rod (8) is threadedly connected to the shell (2); and A second bearing (81) whose inner ring is sleeved on the outer periphery of the driving rod (8); A connecting rod (82) radially arranged at the motor (1), one end of the connecting rod (82) is rotatably arranged on the outer ring of the second bearing (81), and the other end is rotatably arranged on the sealing element (6); rotating the driving rod (8) drives the sealing element (6) to move between the unfolded position and the folded position.

9. The hand-held multi-mode electro-shovel of claim 8, wherein, The driving shaft (11) is coaxially provided with a channel (113), the driving rod (8) is movably arranged in the channel (113), and the driving rod (8) is a metal structural member; The driving rod (8) has a lumen (83) therein, and a liquid absorption core (84) is arranged in close contact with the inner wall of the lumen (83), and a low-boiling-point liquid is stored in the liquid absorption core (84); the liquid absorption core (84) is formed with an air passage (831) on the side away from the inner wall of the lumen (83), and the lumen (83) is in a vacuum environment; The driving shaft (11) is provided with a heat exchange port (114) communicating with the channel (113) on the side above the opening (111) in the axial direction of the motor (1), and the heat exchange port (114) is arranged staggered with the opening (111).

10. A control system for a hand-held multi-mode electric scoop as claimed in any one of claims 1 to 9, characterised in that, Comprise: A temperature sensor arranged in the motor (1) for collecting temperature information of the motor (1); A driving element, the adjustment window comprises an adjustment plate (35) movably connected to the containing box (3) along the circumference of the containing box (3), the adjustment plate (35) has an open position and a closed position, and the driving element is used for driving the adjustment plate (35) to move between the open position and the closed position; A central controller electrically connected with the temperature sensor and the driving element, the central controller receives the temperature information of the motor (1) and controls the driving element to drive the adjustment plate (35) to move between the open position and the closed position.

Images