WO2024055971A1 - 一种动力头及动力系统 - Google Patents

一种动力头及动力系统 Download PDF

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Publication number
WO2024055971A1
WO2024055971A1 PCT/CN2023/118434 CN2023118434W WO2024055971A1 WO 2024055971 A1 WO2024055971 A1 WO 2024055971A1 CN 2023118434 W CN2023118434 W CN 2023118434W WO 2024055971 A1 WO2024055971 A1 WO 2024055971A1
Authority
WO
WIPO (PCT)
Prior art keywords
battery pack
motor
power head
housing
motor assembly
Prior art date
Application number
PCT/CN2023/118434
Other languages
English (en)
French (fr)
Inventor
蒋锋
冯守川
包建如
陶文
Original Assignee
格力博(江苏)股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN202211132147.7A external-priority patent/CN117728619A/zh
Priority claimed from CN202222468928.5U external-priority patent/CN218613874U/zh
Priority claimed from CN202222465307.1U external-priority patent/CN218276306U/zh
Priority claimed from CN202211132238.0A external-priority patent/CN117767631A/zh
Priority claimed from CN202222464220.2U external-priority patent/CN218783648U/zh
Priority claimed from CN202223549911.9U external-priority patent/CN219697346U/zh
Application filed by 格力博(江苏)股份有限公司 filed Critical 格力博(江苏)股份有限公司
Publication of WO2024055971A1 publication Critical patent/WO2024055971A1/zh

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Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K5/00Casings; Enclosures; Supports
    • H02K5/04Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/20Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K9/00Arrangements for cooling or ventilating
    • H02K9/02Arrangements for cooling or ventilating by ambient air flowing through the machine
    • H02K9/04Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
    • H02K9/06Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft

Definitions

  • This application relates to the field of power heads, specifically a power head and a power system.
  • Lithium battery-driven motors have the advantages of low pollution, low noise, and easy control. With the emphasis on environmental protection, green, environmentally friendly, and carbon-reducing living and working styles are advocated. In order to meet the use requirements of larger power tools, the existing lithium battery-driven motor is assembled on the power head, and the external rotor motor needs to be assembled in a protected cavity, which results in heat concentration, heat dissipation difficulties, and complicated assembly. And other issues. Based on the above problems, a lithium battery-driven power head with reasonable structure, convenient assembly and good heat dissipation effect is needed.
  • this application provides a power head to improve the existing power head's technical problems such as unreasonable structure, concentrated heat, difficulty in heat dissipation, and complex assembly.
  • the present application provides a power head. It includes: a motor bracket, a motor assembly cavity is provided in the motor bracket, and a complete machine mounting surface is provided at the bottom of the motor bracket; a shell, the shell is fixed above the motor bracket, and the shell is connected to the motor bracket. A gap is formed between the motor brackets; the motor includes a motor stator, a motor rotor and an output shaft; the motor stator is fixedly assembled in the motor assembly cavity, and the motor rotor is assembled in the motor assembly cavity with the motor assembly cavity.
  • the stator of the motor rotates in phase; the output shaft is fixed to the rotor of the motor, and the output shaft is basically parallel to the installation surface of the whole machine; a battery pack, the battery pack is installed in the housing to form the power head provide energy.
  • the motor bracket is integrally formed, and the motor bracket includes a motor assembly part provided with the motor assembly cavity, a complete machine installation part provided below the motor assembly part, and a The battery support part on the side of the motor assembly part; the battery pack is arranged above the battery support part.
  • a mounting block is provided on the motor assembly part, the mounting block is fixed to the bottom surface of the housing, and the gap is provided between the housing and the motor assembly part. between the outer walls; the housing is provided with a first accommodation cavity for installation of the control module, the first accommodation cavity is arranged above the motor assembly cavity; the first accommodation cavity and the motor assembly cavity pass through The second inner port provided in the housing is connected to the first inner port provided in the motor bracket, and the housing is in contact with the motor assembly cavity wall through the mounting block and the inner port.
  • the motor bracket further includes a reinforced support part.
  • One end of the reinforced support part is provided on the machine installation part, and the other end is provided on the bottom surface of the battery support part.
  • the center of gravity of the power head is located between the left and right offset surfaces of the power head perpendicular to the center surface of the output shaft, and the distance between the left and right offset surfaces and the center surface is not less than Greater than fifteen percent of the width of the power head.
  • the center of gravity of the power head is located in the longitudinal direction between the motor assembly cavity and the housing.
  • the center of gravity of the power head is located between the outer wall of the motor assembly cavity and the battery pack.
  • the maximum output power range of the motor is 3kW to 5kW; the battery pack can be assembled in a handheld electric tool to provide energy for the handheld electric tool; the battery pack includes At least one set of battery cells, the battery cells are connected in series, the maximum output power of the battery core is ⁇ 2kW; the voltage of the battery pack is 80 ⁇ 82V; the power head and the electric tool driven by the power head are connected A control line is provided to control the start and stop of the power head according to the state of the electric tool.
  • the motor assembly cavity is connected to the outside air through a first external opening; a first accommodation cavity for assembling a control module is provided in the housing, and the first accommodation cavity is provided with a second external ventilation opening; a heat dissipation air passage, which is connected in sequence to the first external ventilation opening, the motor assembly cavity, the first accommodation cavity, and the second external ventilation opening.
  • a first fan is provided in the heat dissipation air duct, and the first fan is disposed on the output shaft of the motor rotor.
  • the first fan is disposed at the rear end of the output shaft and the top of the first external opening, and external air enters the first accommodation cavity through the second external opening. , after flowing through the coil windings assembled in the motor assembly cavity, it is driven by the first fan and discharged through the first external opening; a second fan is provided in the heat dissipation air path, and the second fan is arranged on the first On the side wall of the accommodation cavity, the air outlet direction of the second fan is perpendicular to the ventilation direction of the second outer vent.
  • the first fan is disposed at the front end of the output shaft, and the first accommodation cavity and the motor assembly cavity are respectively located in the heat dissipation air path of the first fan. both sides.
  • the heat dissipation air passage includes a first inner vent and a second inner vent
  • the first inner passage is provided at the top of the motor assembly cavity on a side away from the first outer passage;
  • the second inner passage is connected with the first inner passage, and the second inner passage is provided at the bottom of the first accommodation cavity on a side away from the second outer passage.
  • the first external opening passes downward through the motor bracket, the bottom side wall of the motor bracket is provided with ventilation slots, and the first external opening passes through the ventilation slot.
  • the slot is connected to the outside air; the second external opening is provided on the bottom surface of the housing.
  • a shock absorbing device in an exemplary embodiment of the present application, it also includes: a shock absorbing device, the shock absorbing device includes a shock absorbing pad; wherein the housing and the motor bracket are connected through the shock absorbing device, and the shock absorbing device A shock pad is provided between the housing and the motor bracket.
  • the shock absorbing device includes two threaded rods.
  • the two threaded rods are respectively provided on both sides of the shock absorbing pad and are respectively connected to the housing and the corresponding parts of the shock absorbing pad on both sides.
  • the motor bracket is connected; the motor bracket is provided with a first threaded hole, the housing is provided with a first through hole, and the threaded rod on one side of the shock absorbing pad cooperates with the first threaded hole , the threaded rod on the other side of the reducing pad passes through the first through hole and is then threadedly connected to the first nut.
  • the functional interface When the functional interface is connected to an external charger, the external charger can charge the battery pack; when the functional interface is connected to an external expansion battery pack At this time, the extended battery pack and the battery pack can jointly provide electric energy for the motor.
  • a control module is also included.
  • the control module reads the expansion battery pack information and the battery pack information to control the
  • the working state of the expanded battery pack and the battery pack includes: the expanded battery pack and the battery pack discharge together, the expanded battery pack discharges independently; the relationship between the expanded battery pack and the battery pack Information includes battery voltage, temperature, and discharge current.
  • the expanded battery pack and the battery pack are discharged together; the expanded battery When the voltage difference between the battery pack and the battery pack is greater than the first threshold, the expanded battery pack and the battery pack with the higher voltage are discharged first. When the voltage difference is not greater than the second threshold, the battery packs to be discharged are discharged together.
  • the expanded battery pack when the battery pack is not installed or is in an unavailable state, the expanded battery pack is discharged independently, and the control module communicates to inform the subsequent driver board of the expanded battery pack information, so The rear-stage driver board adjusts the output power according to the information of the expanded battery pack.
  • the control module detects the number of battery packs inserted. If only one battery pack is inserted, the inserted battery pack is charged; if two battery packs are inserted, , determine the voltage difference between the two battery packs. If the voltage difference between the two battery packs is within the third threshold range, the extended battery pack charges the two battery packs at the same time; if the two battery packs When the voltage difference exceeds the second threshold range, the battery pack with the lower voltage is charged until the two battery packs When the battery pack voltage difference is within the fourth threshold range, the two battery packs are charged simultaneously.
  • This application also provides a power system, including an upper power head and external equipment; the power head includes:
  • a motor bracket, a motor assembly cavity is provided in the motor bracket, and a complete machine mounting surface is provided at the bottom of the motor bracket;
  • a housing which is fixed above the motor bracket, and a gap is formed between the housing and the motor bracket;
  • a motor the motor includes a motor stator, a motor rotor and an output shaft;
  • the motor stator is fixedly assembled in the motor assembly cavity
  • the motor rotor is assembled in the motor assembly cavity and rotates with the motor stator;
  • the output shaft is fixed to the motor rotor, and the output shaft is substantially parallel to the installation surface of the whole machine;
  • a battery pack which is installed in the housing to provide energy for the power head
  • the external device includes an expansion battery pack and/or an external charger, and the external charger includes at least one of an AC/DC charger, a solar inverter, and a DC/DC charger;
  • the external charger can charge the battery pack
  • the expansion battery pack and the battery pack can jointly provide electric energy for the motor assembly.
  • the power head arrangement of the present application is very different from the existing arrangement.
  • the motor assembly cavity is provided in the housing of the present application.
  • the motor rotor and the motor stator are directly assembled in the motor assembly cavity.
  • the housing is both the main body of the motor and the motor assembly cavity.
  • the casing is also the casing of the entire power head, thereby effectively improving the heat dissipation capacity of the motor and solving the existing problem of heat being concentrated in the protection cavity.
  • the power head of this application has a compact and reasonable structure and is easy to install. It is easy to assemble and install. It can directly replace the existing gasoline engine and solve the problems of large vibration, noise and serious pollution of the existing engine.
  • Figure 1 is a three-dimensional schematic diagram of an exemplary power head of the present application
  • Figure 2 is a schematic structural diagram of an exemplary power head of the present application
  • Figure 3 is a front view of an exemplary power head of the present application.
  • Figure 4 is a rear view of an exemplary power head of the present application.
  • Figure 5 is a top view of an exemplary power head of the present application.
  • Figure 6 is a left side view of an exemplary power head of the present application.
  • Figure 7 is a partial structural schematic diagram of an exemplary power head of the present application.
  • Figure 8 is a perspective view of the partial structure of an exemplary power head of the present application.
  • Figure 9 is a schematic diagram of the partial structure of an exemplary power head of the present application from another angle
  • Figure 10 is a schematic diagram of an exemplary motor bracket in this application.
  • Figure 11 is a top view of an exemplary motor bracket of the present application.
  • Figure 12 is a perspective view of an exemplary motor bracket of the present application.
  • Figure 13 is a schematic diagram of an exemplary shell body of the present application.
  • Figure 14 is a schematic structural diagram of the main body part of an exemplary shell of the present application.
  • Figure 15 is a cross-sectional view of the AA section in Figure 3 of the present application.
  • Figure 16 is an enlarged view of area B in Figure 15 of this application.
  • Figure 17 is a three-dimensional schematic diagram of an exemplary power head of the present application.
  • Figure 18 is a rear view of an exemplary power head of the present application.
  • Figure 19 is a bottom view of an exemplary power head of the present application.
  • Figure 20 is a schematic three-dimensional view of an exemplary power head of the present application after cutting in the vertical direction;
  • Figure 21 is a schematic diagram of an exemplary power head of the present application after cutting in the vertical direction;
  • Figure 22 is a schematic three-dimensional view of another exemplary power head of the present application after cutting in the vertical direction;
  • Figure 23 is a schematic diagram of another exemplary power head of the present application after cutting in the vertical direction;
  • Figure 24 is a perspective view of the partial structure of an exemplary power head of the present application.
  • Figure 25 is a partial structural schematic diagram of an exemplary power head of the present application.
  • Figure 26 is a schematic diagram of an exemplary motor bracket in this application.
  • Figure 27 is a perspective view of an exemplary motor bracket of the present application.
  • Figure 28 is a schematic structural diagram of an exemplary power head of the present application.
  • Figure 29 is a schematic diagram of an exemplary shock absorbing device of the present application.
  • Figure 30 is a partial structural schematic diagram of an exemplary embodiment of the present application.
  • Figure 31 is a partial structural perspective view of an exemplary embodiment of the present application.
  • Figure 32 is a top view of an exemplary motor assembly of the present application.
  • Figure 33 is a schematic diagram of the partial structure of an exemplary housing of the present application.
  • Figure 34 is a schematic three-dimensional view of the partial structure of an exemplary housing of the present application.
  • Figure 35 is a top view of the partial structure of an exemplary housing of the present application.
  • Figure 36 is a schematic diagram of an exemplary battery placement structure in this application.
  • Figure 37 is a schematic structural diagram of an exemplary power head of the present application.
  • Figure 38 is a three-dimensional schematic diagram of an exemplary power head of the present application.
  • Figure 39 is a front view of an exemplary power head of the present application.
  • Figure 40 is a partial structural schematic diagram of an exemplary power head of the present application.
  • Figure 41 is a block diagram of the working principle of an exemplary power head battery assembly of the present application.
  • Figures 1 to 6 show an exemplary power head structure.
  • the power head and the complete machine of the present application are The installation structure of the tool is compatible with the installation structure of the fuel engine, which can realize the replacement of the power head and the fuel engine without replacing the entire machine tool.
  • the power head of this application can meet the requirements of tool power, rotation speed, rotation direction, etc.
  • the power head includes a motor bracket 100 and a housing 200.
  • the motor bracket 100 is provided with a motor assembly cavity 110.
  • the motor assembly cavity 110 is equipped with a motor rotor 300 and a motor stator 400.
  • the output shaft 310 partially extends out of the motor assembly cavity 110.
  • the housing 200 is provided with a battery pack 226, and the battery pack 226 provides energy for the power head.
  • the motor bracket 100 is an integrally formed aluminum alloy shell.
  • the motor bracket 100 serves as a support for the power head.
  • the frame which is also the shell of the motor, is an integrated bracket that can combine the connection between the whole machine and the components into one.
  • the motor bracket 100 is made of aluminum alloy. On the one hand, it is beneficial to the heat dissipation of the motor. On the other hand, it can ensure stable and solid support and increase the service life.
  • the motor bracket 100 is formed in one piece, which reduces assembly steps such as bolts, improves assembly efficiency, and ensures the structural stability of the power head. , Reduce the occurrence of loose assembly problems caused by long-term vibration environment.
  • the motor bracket 100 includes a motor assembly part 118 , a complete machine installation part 120 , and a battery support part 130 .
  • Figure 7 shows an exemplary internal structure of the power head.
  • a motor assembly cavity 110 is provided in the motor assembly portion 118.
  • the motor rotor 300, the motor stator 400, and the output shaft 310 are assembled in the motor assembly cavity 110. and other components.
  • the motor is an external rotor motor, that is, the motor rotor 300 is located outside the motor stator 400 and rotates around the output shaft 310, which can meet higher power requirements.
  • the rated power of the motor is 2kW ⁇ 4kW, and the maximum output power range of the motor is 3kW ⁇ 5kW.
  • the motor has a rated power of 2.9kW and a maximum output power of 3.6kW.
  • the rotation speed of the motor is 2000-4000 rpm. In one embodiment, the rotation speed of the motor can be adjusted, including 2800 rpm, 3200 rpm, and 3600 rpm.
  • a front end cover 114 is fixed with bolts at the front end of the motor assembly cavity 110.
  • a center hole is provided at the center of the front end cover 114, which penetrates the front end cover 114.
  • a bearing is installed in the center hole.
  • the output shaft 310 has an interference fit with the bearing, and the output shaft 310 passes through the front end cover. Part 114 extends out of the battery assembly cavity to facilitate connection with the transmission mechanism.
  • the output shaft 310 has the same specifications as the output shaft of the fuel engine, and can be driven by gears, belts, etc.
  • the distance between the bottom surface of the output shaft 310 is 90 to 120 mm, and the diameter of the output shaft 310 is 18 to 22 mm, making it easy to directly replace the existing fuel engine.
  • the front end cover 112 is provided with four mounting holes, four of which are arranged in a square arrangement around the output shaft 310.
  • the front end cover 112 is installed on the motor bracket 100 through the mounting holes to improve the installation firmness.
  • Degree, in an exemplary embodiment of the present application, the projection distance between the hollow center of the mounting hole and the axis of the output shaft 310 is 40 to 50 mm, which can be adjusted according to actual needs.
  • a rear end plate 116 in the motor assembly cavity, and there is also a center hole in the center of the rear end plate 116.
  • a plurality of rear ventilation holes 117 are provided on the rear end plate 116. The plurality of rear ventilation holes 117 are arranged in a circumferential array around the axis of the output shaft 310 to facilitate air circulation and heat dissipation in the motor assembly cavity 110 and avoid damage to the motor caused by heat accumulation.
  • a rear closing cover 115 is fixed at the tail of the motor assembly cavity 110.
  • a fan cavity is enclosed between the rear closing cover 115 and the rear end plate 116.
  • a first fan 600 is installed in the fan cavity, and the first fan 600 is fixed to the output shaft 310. , when the output shaft 310 rotates, it drives the first fan 600 to rotate synchronously to actively dissipate heat for the motor assembly cavity 110, and the synchronous rotation ensures stable heat dissipation.
  • one end of the first fan 600 close to the rear closing cover 115 is a circular plate. The circular plate cooperates with the blades of the first fan 600 to change the direction of the airflow, so that the airflow passes through the second fan in a preset direction.
  • An external port 111 discharges.
  • Existing motors generally dissipate heat by blowing air into the motor.
  • the first fan 600 of the present application is close to the first outer opening 111.
  • the heat dissipation method is to blow air outside the motor assembly cavity 110 to drive the air flow in the motor assembly cavity 110.
  • the air flow The flow rate is faster and the heat dissipation is more efficient.
  • a first inner port 112 and a first outer port 111 are respectively provided at both ends of the motor assembly cavity 110.
  • the first inner port 112 and the first outer port 111 are respectively located at both ends of the motor assembly cavity 110 to ensure cold air flow. Effective heat dissipation is carried out through the entire motor assembly cavity 110 .
  • the first external passage 111 is provided at the bottom of the motor assembly cavity 110, directly below the first fan 600.
  • the first fan 600 directs the airflow in the motor assembly cavity 110 through the downward first external passage.
  • the downwardly provided first external passage 111 can reduce rainwater, dust, etc. from entering the motor assembly cavity through the first external passage 111.
  • the first external opening 111 penetrates downwardly through the complete machine installation part 120.
  • a ventilation slot 113 is provided at the bottom of the side wall of the complete machine installation part 120. The ventilation slot 113 is connected with the first external opening 111 to ensure the first external opening. 111 has smooth air outlet and ensures heat dissipation effect.
  • the first internal opening 112 is provided at the top of the motor assembly cavity 110 to ensure cold air flow. through the entire motor assembly cavity 110.
  • the motor bracket 100 is formed in one piece. If the first inner port 112 is directly processed by a machining center, the processing is difficult and the accuracy is difficult to guarantee.
  • By dividing the first inner port 112 into two parts one part is placed in the motor assembly cavity 110 One end and the other part are set on the front end cover 114. After the front end cover 114 is assembled on the motor assembly cavity 110, the two parts form a complete first internal passage 112. The openings of the two parts are open-type processing, making the processing more difficult. .
  • the complete machine mounting part 120 is provided at the bottom of the motor mounting part 118 , and the power head is installed on the complete tool machine through the complete machine mounting part 120 .
  • the bottom surface of the whole machine mounting part 120 is a rectangular machine mounting surface 121, which is used to install and fix the power head on the tool machine.
  • the size of the whole machine mounting surface 121 is the same as the size of the existing gasoline engine. The same to facilitate replacement.
  • the machine mounting surface 121 is provided with a plurality of second through holes 124.
  • the second through holes 124 can accommodate bolts to pass through.
  • the machine mounting portion 120 is installed on the machine tool through the second through holes 124 and bolts. The installation is simple and easy. The operation is fast.
  • the second through hole 124 of the present application matches the existing tool machine, making it easy to replace only the fuel engine without replacing the entire power tool.
  • the second through hole 124 is a waist-shaped hole provided on the mounting surface 121 of the whole machine.
  • the radius of the waist-shaped holes is 4 to 6 mm.
  • the distance between the centers of the two semicircles is 14 to 16 mm
  • the radius of the circular hole is 4 to 6 mm.
  • the installation surface of the whole machine is adjusted according to the existing installation dimensions of the fuel engine to facilitate replacement.
  • the output shaft of the motor that is, the axis of the output shaft 310 is parallel to the mounting surface 121 of the whole machine.
  • the whole machine mounting surface 121 is parallel to the ground. In another embodiment, after the whole machine mounting surface 121 is installed on the whole machine, the whole machine mounting surface 121 121 is perpendicular to the ground. At this time, the axis of the output shaft 310 is also perpendicular to the ground. It should be noted that the angle of the output shaft 310 is determined according to the installation position of the entire machine installation surface 121 and the entire machine. In addition to being parallel or perpendicular to the ground, the axis of the output shaft 310 can also have other angles.
  • the mounting surface 121 of the whole machine is substantially parallel to the output shaft of the motor rotor, preferably parallel.
  • the first external opening 111 penetrates downward from the motor assembly cavity 110 to the complete machine installation part 120 .
  • the ventilation slot 113 is provided at the side bottom of the complete machine installation part 120 .
  • the first external opening 111 is connected with the ventilation slot 113 .
  • the machine installation portion 120 is provided with a vertical hollow, and the hollow extends downwardly.
  • reinforcing ribs 123 are formed between several hollow places.
  • the reinforcing ribs 123 enclose a frame shape such as a rectangular, square, triangular or rhombus cross-section.
  • the periphery of the area enclosed by the reinforcing ribs 123 is additionally reinforced.
  • the ribs 123 are connected to the inner wall of the whole machine installation part 120, which ensures the integrity of the reinforcing ribs 123 and improves the strength of the whole machine installation part 120, thereby ensuring that the whole machine installation part 120 can stably support the power head and facilitate
  • the motor assembly cavity 110 dissipates heat through the lower wall.
  • the hollowing process can also reduce weight, save materials, and save costs while ensuring load-bearing strength.
  • the ventilation slots 113 are arranged lower than the reinforcing ribs 123, that is, the hollows are connected to the outside air.
  • a control line is provided between the power head and the whole machine (for example, an air compressor, a cleaning machine or a snow plow and other electric tools driven by the power head).
  • the control line is used to receive the working status of the whole machine, such as an air compressor. Whether the air pressure reaches the threshold, the water pressure of the cleaning machine reaches the threshold, etc. If it reaches the threshold, a signal is sent to the power head, which automatically stops and is in standby mode. When the pressure drops to the set value, a signal is sent to the power head. The powerhead restarts.
  • the battery support part 130 is disposed on the side of the motor assembly part 118.
  • the battery support part 130 is mainly used to support the battery pack 226.
  • the battery pack 226 is relatively high.
  • the battery support part 130 is disposed on the side of the motor assembly part 118.
  • the power head is assembled After completion, the overall shape will be roughly rectangular.
  • the side of the motor bracket 100 is a battery support portion 130.
  • the battery support portion 130 and the main body of the motor bracket 100 form a "Z" shape.
  • the battery support portion 130 is provided with a vertical opening.
  • the upward mounting cavity is fixedly connected to the battery connection portion 220 of the housing 200 .
  • a gap is provided between the battery connecting part 220 and the main body of the motor bracket 100 , that is, there is a gap between the battery connecting part 220 and the side of the motor bracket 100 to facilitate air circulation and facilitate heat dissipation on the side walls of the motor bracket 100 .
  • the battery support part 130 and the outer wall of the motor assembly cavity 110 are fixed at multiple points.
  • the battery support part 130 and the outer wall of the motor assembly cavity 110 are fixed at a certain distance through two
  • the air on the outer wall of the motor assembly cavity 110 can flow through thermal convection, which will cool the wall of the motor assembly cavity 110 and improve the motor assembly.
  • the cavity 110 has a heat dissipation effect on various components assembled therein.
  • the battery support part 130 is integrally formed with the side wall of the motor assembly cavity 110.
  • the battery support part 130 is located on the side of the motor assembly part 118, causing the bottom to be in a suspended state.
  • the battery support part 130 is protected from impact. Problems such as damage and separation of the motor assembly part 118 may occur due to large forces.
  • a reinforced support part 140 is provided on the complete machine installation part 120, and the bottom of the reinforced support part 140 is in contact with the complete machine installation part 120. , the top of the reinforced support part 140 is supported on the bottom surface of the battery support part 130, and the reinforced support part 140 is tilted to effectively support the battery support part 130 and ensure stable support for the battery pack 226 under complex working conditions such as vibration.
  • the bottom surface of the battery support part 130 is provided with an enclosing enclosure.
  • the enclosures are provided on three sides of the bottom surface of the battery support part 130 that are not close to the motor assembly part 118.
  • the housing 200 is provided with a recessed portion that is compatible with the enclosure, and the recessed portion is recessed into the housing 200, and the recessed portion is in contact with the top of the enclosure A step is formed at the surface contact position. Through the flat contact between the step and the top surface of the enclosure, the housing 200 can be further supported to prevent the housing 200 from shaking or toppling.
  • a number of weight reduction holes are provided on the bottom surface of the battery support part 130 to achieve a weight reduction design.
  • the battery support part 130 is reduced in size.
  • the weight-saving holes are also helpful for heat dissipation at the bottom of the battery.
  • the weight-reducing hole at the bottom of the battery support part 130 is a long hole, which facilitates heat dissipation of the battery pack 226 through the battery connection part 220 while ensuring the load strength of the battery support part 130 .
  • the power head also includes a housing 200, which is fixed on the upper part of the motor bracket 100.
  • the housing 200 is provided with a first accommodation cavity 210 and a second accommodation cavity 221.
  • the first accommodation cavity 210 is equipped with a control component 211 such as a control panel.
  • the control component 211 and the switch circuit assembled on the bottom case connection, the battery pack 226 is detachably installed in the second accommodation cavity 221.
  • the battery pack 226 is electrically connected to the control component 211 and the motor to provide energy for the rotation of the motor.
  • the housing 200 is preferably a plastic housing 200.
  • the plastic housing 200 can reduce the weight of the power head and facilitate control.
  • it can provide buffering for the components assembled in the housing 200 when it is dropped or receives a large impact. , to avoid damage to the components assembled in the housing 200.
  • the housing 200 is fixedly connected to the motor bracket 100.
  • a gap 900 is provided between the motor assembly portion 118 and the housing 200.
  • the motor assembly part 118 is provided with a mounting block 150 , and the mounting block 150 is fixedly connected to the bottom surface of the housing 200 .
  • the first accommodation cavity 210 and the motor assembly cavity 110 are connected through the second inner opening 213 provided in the housing and the first inner opening 112 provided in the motor bracket 100. Between the housing 200 and the motor assembly part 118, except Except for the installation block 150 and the inner port in contact, the other positions are not in contact.
  • the motor assembly part 118 and the components assembled in the motor assembly part 118 constitute an external motor, which can effectively ensure that the components assembled in the motor assembly cavity 110 can dissipate heat through the side walls of the motor assembly part 118, thereby improving the heat dissipation capacity and preventing Heat accumulation increases the service life of the power head.
  • the housing 200 is provided with an operation panel, and the operation panel is provided with a power switch, which can control the power head on and off.
  • a power switch On the side of the power switch, there is a speed selector switch.
  • the speed selector switch is a membrane switch and has three speeds: low, medium and high. The operator presses the speed selector switch in sequence to switch between low, medium and high speeds.
  • the operation panel is also equipped with a display device to display the battery pack's power, which can display the remaining power of the battery pack in real time.
  • the first accommodating cavity 210 is disposed above the motor assembly part 118, and the second accommodating cavity 221 is disposed on the top of the battery support part 130.
  • the height of the battery pack 226 is relatively large. By placing the first accommodating cavity 210 Disposed above the motor assembly part 118, the overall layout of the power head is more reasonable.
  • the motor rotor 300, the motor stator 400, etc. are installed in the motor assembly part 118, and the weight is relatively large.
  • the weight of the battery pack 226 in the housing 200 is greater.
  • the battery pack 226 and the motor assembly part 118 are arranged almost horizontally, so that the weight of the power head is more evenly distributed and the operation is more convenient.
  • the center of gravity projection of the power head is located between the left and right offset surfaces of the center surface of the power head.
  • the distance between the left and right offset surfaces and the center surface is no greater than 15% of the width of the power head.
  • the center of gravity of the power head is projected between the left and right offset surfaces, making it easier for the user to operate.
  • the center of gravity projection of the power head is located on the center plane of the power head, and the center plane is the center plane of the power head perpendicular to the output shaft 310 .
  • the center of gravity is located longitudinally between the motor assembly cavity 110 and the housing.
  • the center of gravity is located above the motor assembly part, and the first accommodation cavity is located in the housing. below.
  • the center of gravity of the power head is located between the motor assembly part and the battery pack. The center of gravity of the power head is limited in three directions to facilitate the operation of the tool.
  • the casing 200 includes a casing main body 222, a top cover 230, and a flip cover 223.
  • the casing 200 is preferably made of plastic, which is easy to process and low in cost, and can also be used as a casing during vibration or impact.
  • the components assembled in the body 200 provide buffering to prevent damage to the components. Please refer to Figures 13 and 14.
  • the shell body 222 is provided with two vertical open cavities; the top cover 230 and the shell body 222 are fixedly connected through screws or bolts to form a first accommodation cavity 210.
  • a large amount of heat will be generated during operation. If the heat cannot be dissipated in time, the temperature of the electronic components will be too high and damaged or the control operation will be affected.
  • a second outer passage 212 and a second inner passage 213 are provided at the bottom of the first accommodation cavity 210.
  • the second outer passage 212 and The second inner passage 213 is provided on both sides of the bottom of the first accommodation cavity 210 , that is, the second outer passage 212 and the second inner passage 213 are provided on both sides of the control assembly 211 , and the second outer passage 212 and the second
  • the airflow direction between the inner vents 213 is parallel or substantially parallel to components such as the control panel, thereby ensuring that the cold air entering the second outer vent 212 flows through the control assembly 211 and then flows out of the first accommodation cavity 210 through the second inner vent 213 , to improve the heat dissipation capacity of the first accommodation cavity 210.
  • the heat dissipation of the control component 211, motor and other components is coordinated and coordinated.
  • the power head includes a heat dissipation air duct. Please refer to Figures 20 and 21.
  • the two ends of the heat dissipation air duct 500 are respectively the first outer opening 111 provided at the bottom of the motor assembly cavity 110 and the first external opening 111 provided at the bottom of the motor assembly cavity 110.
  • the second external opening 212 at the bottom of 200.
  • the first external opening 111 is provided at the bottom of the motor assembly cavity 110 on the side away from the front end cover 114 .
  • the side of the front end cover 114 needs to be connected to the transmission assembly, and the space arrangement is more compact.
  • the side away from the front end cover 114 has fewer structures and has a larger heat dissipation space, which is beneficial to improving the heat dissipation capacity.
  • the first external opening 111 penetrates downwardly through the motor bracket 100.
  • the bottom of the side wall of the motor bracket 100 is provided with a ventilation slot 113.
  • the first external opening 111 communicates with the lateral air through the ventilation slot 113, and the ventilation direction is consistent with the output shaft 310. Parallel or substantially parallel.
  • the second external opening 212 is provided at the bottom of the housing 200 , and a gap is provided at the connection between the housing 200 and the motor bracket 100 at the first accommodation cavity 210 to facilitate air flow at the second external opening 212 .
  • the first external opening 111 is connected to the lateral air through the ventilation slot 113.
  • the gap between the ventilation slot 113 and the second external opening 212 can be improved. distance to prevent hot air from being re-inhaled into the power head; on the other hand, the first external opening 111 penetrates downwardly through the motor bracket 100 and communicates with the air through the lateral ventilation slots 113, and the second external opening 212 is provided at The bottom of the housing 200 can also prevent rainwater from entering the first accommodation cavity 210 through the second outer opening 212, thereby improving the waterproof capability.
  • the heat dissipation air path 500 also includes a first internal passage 112 provided at the top of the motor assembly cavity 110 and a second internal passage 213 provided at the bottom of the housing 200.
  • the first internal passage 112 is in contact with the second internal passage 213.
  • Contact connectivity The motor assembly cavity 110 and the first accommodation cavity 210 are connected through the first inner passage 112 and the second inner passage 213, thereby facilitating centralized heat dissipation of the power head and better ensuring heat dissipation efficiency.
  • the first inner opening 112 is disposed at the top of the side away from the first outer opening 111, thereby ensuring that the air flow in the heat dissipation air path 500 can penetrate the entire first accommodation cavity 210, and the air flows through the coil Winding to improve heat dissipation effect.
  • the second inner port 213 is disposed at the bottom of the housing 200 away from the second outer port 212. It is ensured that the air in the heat dissipation air path 500 flows through the first accommodation cavity 210 to fully dissipate heat for each component of the control module 211 .
  • a first fan 600 is provided in the heat dissipation air duct 500.
  • the first fan 600 drives the air to flow, thereby increasing the air flow speed in the heat dissipation air duct 500 and improving the heat dissipation efficiency.
  • the first fan 600 is disposed on the output shaft 310, specifically on the side of the output shaft 310 away from the front end cover 114 and the top of the first outer opening 111.
  • the first fan 600 is preferably a centrifugal fan.
  • the first fan 600 is disposed on the output shaft 310. When the motor rotates, the first fan 600 rotates synchronously to ensure the stability of heat dissipation.
  • the first fan 600 When the motor stops rotating, the first fan 600 immediately stops rotating, which can save energy and reduce consumption. 600 invalid turns.
  • the first fan 600 rotates to drive air to be discharged outward from the first outer port 111, thereby driving the outside air to flow from the second outer port 212 into the first accommodation cavity 210, through the second inner port 213, and the first accommodating cavity 210.
  • An inner passage 112 flows backward into the motor assembly cavity 110, passes through the coil windings, and is then driven by the first fan 600 to be discharged to the outside.
  • the original heat dissipation method is usually to blow air to the part that needs heat dissipation, thereby driving the air flow to the area to be heat dissipated.
  • the first fan 600 blows air to the outside, so that the area to be heat dissipated draws air from the outside, so that the flow rate of the air flow is increased. Faster, the flow direction and speed are more stable, ensuring stable and continuous heat dissipation effect.
  • the rear side of the first fan 600 is provided with a blade baffle 601.
  • the blade baffle 601 can change the direction of the air flow to ensure that the air flow is changed from the transverse direction flowing through the motor assembly cavity 110 to the longitudinal direction parallel to the first outer opening 111 to avoid
  • the airflow continues to flow toward the tail of the output shaft 310 to reduce the occurrence of eddy currents, ensure the stability of the airflow in the heat dissipation air path 500, and ensure the stability of heat dissipation.
  • the first fan 600 is disposed on the output shaft 310, specifically at an end of the output shaft 310 close to the front end cover 114 and the bottom of the first inner passage 112.
  • the first fan 600 is preferably an axial flow fan. fan.
  • the airflow can first flow into the motor assembly cavity 110 through the first outer passage 111, and then be driven by the first fan 600 to flow into the first accommodation cavity 210, and finally flow out through the second outer passage 212, and the outside air is Inhale into the area to be cooled to ensure stable heat dissipation.
  • the control component 211, the battery pack 226, etc. all generate heat.
  • the first accommodation cavity 210 and the second accommodation cavity The cavity 221 is relatively large.
  • the first accommodation cavity 210 is assembled on a side wall close to the second outer opening 212.
  • the blowing direction of the second fan 214 is perpendicular or obliquely upward to the second outer opening 212.
  • the second fan 214 can accelerate the flow speed of the air flow on the one hand and change the movement direction of the air flow on the other hand. This allows the airflow to flow through a larger area to ensure adequate heat dissipation.
  • the air flow direction driven by the second fan 214 is consistent with the air flow direction in the heat dissipation air passage 500 . That is, when the airflow flows in from the second outer vent 212, the blowing direction of the second fan 214 is perpendicular to the wind direction of the second outer vent 212 and into the first accommodation cavity 210. When the airflow flows out from the second outer vent 212, the The blowing direction of the two fans 214 is parallel to the wind direction of the second outer vent 212 and blows air in the direction of the second outer vent 212 .
  • the heat dissipation air path 500 is relatively long, and by providing the second fan 214, the air flow speed can be significantly increased and the heat dissipation effect can be improved.
  • the second inner passage 213 is connected with the first inner passage 112.
  • the first fan 600 blows air to the first outer passage 111, driving the cold air from the second outer passage 212 into the first accommodation cavity 210, and passes through the second inner passage.
  • the opening 213 and the first inner opening 112 enter the motor assembly cavity 110, and finally flow out through the first outer opening 111 and the ventilation slot 113, and are blown outward by the first fan 600 to drive air flow for heat dissipation.
  • the first accommodation cavity 210 is equipped with a control board and other electronic components.
  • the control board and other electronic components are fixed in the first accommodation cavity 210 with screws.
  • the control board and Other electronic components are arranged in a direction parallel to the output shaft 310 , forming a number of transverse passages penetrating the first accommodation cavity 210 , and several passages are components of the heat dissipation duct.
  • the cooling air duct divides the control module 211 laterally, allowing airflow to flow through the control module 211, ensuring that the control board and other electronic components of the control module 211 can effectively dissipate heat, and avoid the problem of local heat accumulation.
  • the heat dissipation air duct transversely runs through the first accommodation cavity 210, making the air flow channel unobstructed, reducing the air flow velocity caused by excessive bends, reducing the occurrence of eddy currents, increasing the flow speed of the air flow, and improving the heat dissipation efficiency.
  • a gap is provided between the housing 200 at the bottom of the first accommodation cavity 210 and the top of the motor bracket 100; two mounting blocks 150 are provided on the top side of the motor bracket 100, and the motor bracket 100 passes through
  • the extended mounting block 150 is fixedly connected to the housing 200 to ensure that there is a gap between the top of the motor bracket 100 and the housing 200 at the bottom of the first accommodation cavity 210 .
  • the aluminum alloy one-piece motor bracket 100 has good thermal conductivity.
  • the side walls of the motor assembly cavity 110 can directly discharge heat.
  • the heat dissipation to the motor bracket 100 also reduces the heat dissipated by the motor bracket 100 and transferred to the plastic housing 200 through thermal conduction, thereby effectively improving the heat dissipation efficiency of the first accommodation cavity 210 and the motor bracket 100 .
  • the power head is installed on the complete tool machine.
  • the environment of the complete tool machine is generally relatively harsh. For example, various cutting operations will cause small debris to fly, dust to fly, etc., especially when the second outer vent 212 is inwardly inflowing air, it is easy to Drive debris, dust, etc. into the power head following the cold wind.
  • a filtering device 700 is installed at the second external opening 212. The filtering device 700 is used to filter debris, dust, etc. in the cold wind to prevent debris, dust, etc. from entering the power head and causing the power head to be damaged. problems such as damage or reduced heat dissipation effect.
  • the second outer opening 212 is where the housing 200 is recessed into the first accommodation cavity 210 to form a grille-like air inlet.
  • a filter is installed in the recessed portion, and the filter can effectively filter out debris in the cold wind. crumbs, dust, etc.
  • the bottom surface of the recessed part is removable and fixed with a grille plate.
  • the grille plate and the recessed part adopt a quick-release structure.
  • the recessed part is provided with a bayonet, and the edge of the grille plate is provided with a V-shaped opening block. The block and the buckle match. Without affecting the air intake, the grille plate can prevent larger debris, stones, etc. from damaging the filter. It can also restrict the filter to prevent it from falling off.
  • the quick-release structure can make it easier to replace the filter, improving the efficiency of the filter. Maintenance efficiency.
  • FIG. 13 Another vertically upward open cavity of the shell body 222 is matched with a flip cover to form a second accommodation cavity 221.
  • the battery pack 226 is assembled in the second accommodation cavity 221.
  • the bottom of the second accommodation cavity 221 is provided with
  • the terminal is electrically connected to the battery pack 226.
  • This terminal is connected to the control component 211 and the motor. Through this terminal, the battery pack 226 can be quickly connected to the power head circuit.
  • the back of the second accommodation cavity 221 is a partition. On the one hand, the partition divides the first accommodation cavity 210 and the second accommodation cavity 221. On the other hand, the partition can be used to directly fix part of the control assembly 211 to achieve a reasonable arrangement of the structure.
  • At least two battery packs 226 can be installed in the housing 200, and the two battery packs 226 can This application does not limit whether the battery packs 226 are of the same model or different models, and the battery pack 226 of the corresponding model can be selected according to the usage requirements of the power head to provide power for the power tool.
  • the two battery packs 500 are connected in parallel, which can increase the power of the power head. In other embodiments, two battery packs 500 may be connected in series to provide the operating voltage of the power head.
  • the two battery packs 500 can also be discharged to the outside in sequence. When one battery pack 500 is exhausted, the other battery pack 500 begins to be discharged to the outside to increase power storage and extend the working time. The specific adjustments can be made according to actual needs.
  • two battery packs 226 are disposed on both sides of the power head in the forward direction or front and back along the forward direction.
  • the two battery packs 226 are spaced apart.
  • Partitions are provided in one to two-thirds of the area, and there are gaps between the other areas. By providing partitions and gaps, heat accumulation between the two battery packs 226 is avoided, the heat dissipation capacity is improved, and the working temperature of the battery pack 226 is ensured to be normal.
  • a spring is provided at the bottom of the battery connection part 220, and a battery locking part 225 is provided on the side wall of the battery connection part 220.
  • the spring When the battery pack 226 is inserted into the battery connection part 220, the spring is compressed, and the battery locking part 225 is locked. The battery pack 226 is locked within the battery connector 220 . When the battery lock 225 is unlocked, the battery pack 226 is ejected under the elastic force of the spring, which facilitates quick access to the battery pack 226 and increases the replacement speed.
  • At least one battery pack is disposed inside the battery pack 226, and one battery pack includes a plurality of electrically connected battery cells. Cells are connected in series or parallel to obtain the required voltage.
  • the power head of this application is used to replace the commonly used gasoline engine. As mentioned above, the output power of the power head is 2kw ⁇ 4kW.
  • the voltage of the battery pack is 80 ⁇ 82V, and the cells in the battery pack 226 are connected in series.
  • the voltage of the battery core is 3.6V, and the number of battery cells in a string is 22 to 23.
  • the battery pack 226 may have more than one cell string, each cell string has an equal number of cells, and the cell strings are connected in parallel. In one embodiment, the number of battery strings is 1 to 3.
  • the power head When two battery packs 226 are connected in parallel to discharge batteries externally, the power head is powered by 2 to 6 battery cell strings, ensuring that even if the power head reaches the maximum output power, the discharge current of the battery cells is still within the safety threshold range. In order to ensure the safety and heat dissipation effect of the operation of the battery pack 226, the output power of each battery string is less than or equal to 2kW.
  • the battery cell may be a lithium battery cell.
  • the battery pack 226 can be detached from the power head by the user, and the disassembled battery pack 226 can be installed in other handheld power tools to provide energy for the handheld power tools. That is to say, the battery pack 226 in this application is not only It can be applied to the power head, and can also be applied to other handheld tools.
  • the battery pack 226 in other handheld tools can also be applied to the power head of the present application, thereby improving the adaptability of the battery pack and also improving the The ability of the power head to adapt to the battery pack 226.
  • handheld power tools can be garden tools such as lawn trimmers, pruners, and hair dryers; they can also be torque output tools such as electric drills and electric hammers; they can also be electric circular saws, jigsaws, and reciprocating saws. Such as saw tools, angle grinders, sanders and other grinding tools.
  • the battery pack 226 can also provide power for hand-push power tools, such as hand-push lawn mowers, hand-push snow blowers, etc.
  • the flip cover 223 is rotatably connected to the main body 222 of the case, and is used to open and close the second accommodation cavity 221 to facilitate replacement of the battery pack 226. Furthermore, a shaft fixing seat is provided on the top of the partition plate of the main body 222 of the shell. A rotation axis parallel to the partition plate of the main body 222 is provided on the axis fixing seat.
  • the flip cover 223 is rotationally connected to the battery compartment through the rotation axis.
  • the flip cover 223 is rotatably connected to the battery connection part 220 to facilitate quick access to the battery pack 226, and also provides waterproof and dustproof protection to the battery pack 226, extending the service life of the battery pack 226.
  • the rotation angle between the flip cover 223 and the battery connection part 220 is limited by the limiting slot, and is specifically adjusted according to the actual situation of the battery pack 226, which is not limited in this application.
  • the flip cover 223 in order to ensure that during use, the flip cover 223 will not automatically open under complex working conditions such as vibration, and can only be quickly opened when the battery pack 226 needs to be replaced, etc.
  • a lock 224 is provided between the flip cover 223 and the shell body 222 .
  • the lock 224 includes a first rotating plate and a second rotating plate that rotate relative to each other.
  • the first rotating plate is rotationally connected to the front end of the battery connecting part 220 , and the first rotating plate rotates around the rotating axis on the battery connecting part 220 .
  • the end of the first rotating plate away from the rotating shaft of the battery connection part 220 is rotatably connected to a second rotating plate.
  • the end of the second rotating plate close to the first rotating plate is provided with a locking portion.
  • the front end of the flip cover 223 is provided with a locking portion that matches the locking portion. card slot.
  • the first rotating plate and the second rotating plate are located on the battery
  • the front end of the outer wall of the connecting portion 220 is in a naturally drooping state.
  • the first rotating plate vertically upward, and then rotate the second rotating plate until the locking part is rotated and inserted into the arc-shaped slot to achieve locking, between the flip cover 223 and the battery connection part 220 relatively fixed.
  • the battery connecting portion 220 is a part of the case body 222. In other words, after being locked, the flip cover 220 and the case body 222 are relatively fixed.
  • a shock absorbing device 800 is provided between the motor bracket 100 and the housing 200 .
  • the motor bracket 100 and the housing 200 are connected and fixed through the shock absorbing device 800 .
  • the shock absorbing device 800 includes a shock absorbing pad 801 .
  • the shock absorbing device 800 is connected and fixed between the motor assembly and the housing 200 .
  • the shock absorbing pad 801 is provided between the motor assembly and the housing 200 to provide buffering.
  • the main source of vibration of the power head is the motor assembly.
  • the housing 200 is used to fix and protect the control components 211 such as the control board and the battery pack 226.
  • the shock absorbing pad 801 is provided between the motor assembly and the housing 200, which can effectively filter the motor. The vibration caused by the components reduces the impact on the control component 211 and the battery pack 226 in the housing 200 .
  • Figure 15 is a cross-sectional view of the AA section in Figure 3 of the present application.
  • Figure 16 is an enlarged view of the B area in Figure 15.
  • Figures 15 to 16 show an exemplary shock absorber.
  • Figure 29 is a schematic diagram of an exemplary shock absorbing device 800.
  • each shock absorbing device 800 also includes two threaded rods 802, and two threaded rods 802.
  • the rods 802 are respectively fixed on the upper and lower sides of the shock absorbing pad 801.
  • the motor bracket 100 is provided with a first threaded hole 240
  • the housing 200 is provided with a first through hole 250.
  • the first threaded hole 240 corresponds to the position and number of the first through hole 250, and the threaded rod 802 on one side is screwed. into the first threaded hole 240, and the other The threaded rod 802 on the side penetrates the first through hole 250 and is bolted to the first nut 803 to realize the connection between the motor bracket 100 and the housing 200.
  • the shock absorbing pad 801 improves buffering and filters vibration.
  • a mounting block 150 is provided on the side wall of the motor bracket 100.
  • the mounting block 150 is integrally formed with the motor bracket 100 to ensure the stability of the support.
  • the top of the installation block 150 is provided with a cushion cavity 804, and the bottom of the cushion cavity 804 is provided with a first threaded hole 240.
  • a threaded rod 802 on the shock absorbing device 800 is screwed into the first threaded hole 240 to absorb shock.
  • the pad 801 is disposed in the pad-containing cavity 804.
  • the bottom of the casing 200 is provided with a surrounding portion 805.
  • the surrounding portion 805 is buckled on the top surface of the pad-containing cavity 804 to seal the pad-containing cavity 804.
  • a first through hole 250 is provided in the middle of the pressing part 806.
  • the pressing part 806 presses the shock absorbing pad 801 to ensure a firm assembly.
  • Another threaded rod 802 penetrates the first through hole 250 and then connects with the first nut. 803 threaded connection.
  • the shock absorbing pad 801 is sealed and protected against water and dust, preventing liquid or dust from damaging the shock absorbing pad 801, slowing down the aging rate of the shock absorbing pad 801, and extending the use time.
  • the installation of the shock absorbing device 800 can be adaptively deformed.
  • the cushion cavity 804 is provided on the casing 200. As long as a receiving cavity is formed to protect the shock absorbing pad 801, the receiving cavity can be modified. Waterproof or dustproof protection.
  • the main body of the housing 200 is a plastic housing 200.
  • the plastic housing 200 has a certain elasticity.
  • the plastic housing The body 200 can also provide buffering to ensure that even if the tool falls and causes a large impact, the control component 211, battery pack 226, etc. can still be protected and remain intact.
  • buffering and shock absorbing protection are provided for the control component 211 and the battery pack 226.
  • Shock absorbing devices 800 are installed at the bottom of the first accommodating chamber 210 and the bottom of the second accommodating chamber 221 to improve the buffering effect.
  • the weight of the battery pack 226 far exceeds the weight of the control component 211.
  • the number of shock absorbing devices 800 at the bottom of the second accommodating chamber 221 is more than the number of shock absorbing devices 800 at the bottom of the first accommodating chamber 210.
  • the assembly cost and assembly time are saved.
  • two shock absorbing devices 800 are set at the bottom of the first accommodating chamber 210, and four shock absorbing devices 800 are set at the bottom of the second accommodating chamber 221.
  • the battery pack 226 is equipped with a plurality of shock absorbing devices 800 at the bottom of the second accommodating chamber 221.
  • the components 211, battery pack 226 and other parts are provided with buffer protection to reduce vibration, prevent damage by vibration and extend service life.
  • the power head also includes a functional interface 1050.
  • the expansion battery pack and the battery pack 226 can jointly provide electric energy for the motor assembly. Providing electric energy to the motor assembly can effectively improve the endurance of the power head; when the external charger is connected to the power head through the functional interface 1050, the external charger can charge the battery pack 226.
  • the battery pack 226 is charged through an external charger.
  • the battery pack 226 does not need to be taken out for charging, which is convenient for charging the battery pack 226.
  • the operation is convenient and simple, and the battery life of the power head is improved.
  • the shape and power capacity of the expanded battery pack are not limited.
  • the expanded battery pack can be carried on the back of the user, so that the expanded battery pack can be used when using , the staff can operate the power tools normally; for traveling power tools, such as walk-behind and riding lawn mowers, the extended battery pack can be externally attached to the power tools to reduce the load of the staff and reduce the labor intensity of the staff.
  • the selection of battery packs is expanded based on actual scenarios.
  • the shape of the expanded battery pack can be of fixed specifications.
  • the expanded battery pack is placed in different accommodation devices, such as backpacks, external bags, etc. Different accommodation devices can be selected according to different usage needs.
  • the control module 211 when the extended battery pack is connected to the power head through the functional interface 1050, the control module 211 reads the extended battery pack information and the battery pack 226 information to control the working status of the extended battery pack and the battery pack 226.
  • the control module 211 communicates with the expansion battery pack through the USART serial port to confirm that the functional interface 1050 is inserted into the expansion battery pack, and reads the information of the expansion battery pack in real time, including but not limited to battery voltage, temperature, and discharge current information. .
  • the control module 211 reads and communicates with the expansion battery pack through the USART serial port, according to the read expansion battery pack information, when the voltage is similar, the expansion battery pack switches into the main circuit and discharges in parallel with the battery pack 226, so as to To obtain greater output power or battery life, the control module 211 connected to the expanded battery pack can inform the subsequent driver board of the available current through serial communication, so that the subsequent driver board can adjust the output power according to the discharge capacity of the expanded battery pack.
  • the voltage difference between the expanded battery pack and the battery pack 226 is obtained.
  • the first threshold is any value from 3 to 5V, such as 3V, 4V, 5V, etc.
  • the first threshold is 3V; when the voltage difference between the battery pack and the battery pack 226 is expanded, When it is greater than the first threshold, the one with the higher voltage among the expansion battery pack and battery pack 226 is discharged first.
  • the second threshold is between 1 and 2V. any value, such as 1V, 2V, etc., in an embodiment of the present application, the second threshold is 1V.
  • the voltage differences between the battery packs are compared by pair.
  • the maximum voltage difference is not greater than the first threshold, all battery packs are discharged together.
  • the battery pack with the highest voltage and the battery pack whose voltage difference is not greater than the first threshold are discharged together, until the voltage difference between the battery pack with the highest voltage and the battery pack to be discharged is not greater than the second threshold, the battery pack to be discharged
  • the battery packs are discharged together, and so on to achieve the common discharge of all battery packs.
  • the control module 211 uses the USART serial port in real time. Communicates with the expanded battery pack to confirm that the inserted battery pack is an expanded battery pack.
  • the control module 211 detects the expanded battery pack information in real time, including battery voltage, temperature, discharge current and other information, expands the battery pack, and discharges the expanded battery pack independently.
  • the control module 211 notifies the subsequent driver board of the expanded battery pack information through communication, and the subsequent driver board adjusts the output power according to the expanded battery pack information, thereby avoiding abnormalities or damage caused by extreme discharges such as over-discharge and over-temperature of the expanded battery pack, and improves efficiency. Extend the service life of the battery pack.
  • the battery assembly includes a charging switch.
  • the control module 211 detects that the charging switch is turned on and determines that the battery pack 226 needs to be charged, the external charger connected through the functional interface 1050 charges the battery pack 226 .
  • the control module 211 when the external charger is connected to the power head through the functional interface 1050, the control module 211 is powered on by activation. If it detects that the charging switch is turned on and determines through communication that the battery pack 226 needs to be charged, the control module 211 Module 211 switches to charging mode. The control module 211 detects the number of inserted battery packs 226. If only one battery pack 226 is inserted, the inserted battery pack 226 is charged; if two normal battery packs 226 are inserted, the voltages of the two battery packs 226 are first determined. If the voltage difference between the two battery packs 226 is not greater than the third threshold, the two battery packs 226 will be charged simultaneously.
  • the third threshold is any value from 3 to 5V, such as 3V, 4V, 5V, etc. In this application, the third threshold is the same as the first threshold, which is 3V. If the voltage difference between the two battery packs 226 is greater than the third threshold, the battery pack 226 with the lower voltage of the two is charged first until the voltage difference between the charged battery pack 226 and the battery pack 226 to be charged is not greater than the third threshold. At the fourth threshold, the battery pack 226 to be charged is connected, and the two battery packs 226 are charged together. As an option, the fourth threshold is any value between 1 and 2V, such as 1V, 2V, etc. In one embodiment of the present application, The fourth threshold is the same as the second threshold, which is 1V.
  • the control module 211 closes the charging channel.
  • a warning light is provided on the power head. When the battery pack 226 is fully charged, the warning light turns green to facilitate the staff to better detect the completion of charging and remove the external charger in time.
  • the battery assembly includes a switch.
  • the control module 211 can switch the battery pack 226 to the charging mode and the discharge mode through the switch to meet the charging and discharging needs of the battery pack 226.
  • the external charger may be an AC/DC charger.
  • the control module 211 detects that the charging switch is turned on and the battery pack 226 needs to be charged, communicating through CAN or serial port. After confirming that it has entered the charging state, the control module 211 controls the switch to the charging channel, and the battery pack 226 enters the charging mode.
  • the external charger is a solar inverter charger.
  • the principle of charging the battery pack 226 through the solar inverter charger is as described above and will not be described again. Charging the battery pack 226 through a solar inverter charger can effectively improve the adaptability of the power head to field work. For some remote areas or wild areas where ordinary household or industrial electricity cannot be directly accessed, the battery pack can be charged through a solar inverter charger. 226 for charging, it is helpful to improve the power head’s field applicability and meet the use requirements in different environments. Charging the battery pack 226 through a solar inverter charger can also save energy and protect the environment, further improving the environmental protection effect.
  • the external charger is a DC/DC charger.
  • the functional interface 1050 When the functional interface 1050 is connected to an external DC/DC charger, several battery packs 226 are charged separately or simultaneously.
  • the charging principle is as described above and will not be described again.
  • the functional interface 1050 has multiple expansion battery packs and external chargers that can be connected to the power head at the same time.
  • the external chargers include AC/DC chargers, solar inverter chargers and DC/DC chargers. one of the. At this time, the external charger can not only charge the battery pack, but also charge the expanded battery pack.
  • the battery component includes a USB and/or type-C output interface, and the USB output interface can be connected to an external USB cable to meet various usage needs.
  • the type-C output interface supports the PD communication protocol and can charge mobile phones, tablets, computers, etc.
  • the voltage of the battery pack 226 is DC-DC stepped down to meet the power supply standard of electronic equipment such as a mobile phone or computer.
  • the user can power the mobile phone or computer, etc. Electronic devices are charged to meet the needs of staff.
  • the power head includes a Bluetooth module
  • the user can connect to the Bluetooth module through a mobile phone APP to view various information of the power head, such as battery pack 226 power, accumulated running time, remaining working time, historical faults and other information , the above information can be uploaded to the cloud through the mobile APP, so that manufacturers can analyze and improve the power head and enhance user experience.
  • the mobile APP can obtain the upgrade data package through the network, and then update the software version of the power head through the connection between the mobile APP and the Bluetooth module to fix possible bugs or hidden dangers. You can also obtain the latest operating methods and enable more functions. etc., effectively improving user experience.
  • the power head includes: a complete casing 1, a motor component, and a battery component.
  • the complete casing 1 includes a motor bracket 100 and a casing 200.
  • the motor set is assembled in the motor bracket 100.
  • the motor component drives the working part to work, and the battery component is assembled in the motor bracket 100. inside the housing 200.
  • the battery assembly includes a battery pack 226, a control module 211 and a functional interface 1050.
  • External devices include expansion battery packs and/or external chargers.
  • the external chargers include at least one of AC/DC chargers, solar inverters, and DC/DC chargers; where, when the functional interface is connected to an external charger, The external charger can charge the battery pack, which can facilitate charging of the power head and improve the endurance of the power head; when the functional interface 1050 is connected to the external expansion battery pack, the expansion battery pack can jointly provide electric energy to the motor assembly with the battery pack, improving the The output power of the power head improves the endurance of the power head.
  • the parts and relative connection relationships of the above-mentioned power system that are not described in detail can be referred to the corresponding existing power systems, and will not be described again in this application.
  • the functional interface 1050 can be connected to the same platform expansion battery pack and the same platform external charger.
  • the external chargers include solar inverter chargers, AC/DC chargers, DC/DC chargers, etc., to facilitate charging of the battery pack 226 in different ways. Improve battery life.
  • the expanded battery pack can realize joint discharge with the battery pack 226, independent discharge, etc. through the functional interface 1050, thereby increasing the output power and extending the battery life.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Motor Or Generator Frames (AREA)

Abstract

本申请提供一种动力头及动力系统,涉及动力头领域。动力头包括:电机支架,所述电机支架内设有电机装配腔,所述电机支架底部设置有整机安装面;壳体,所述壳体固定于所述电机支架的上方,所述壳体与所述电机支架间形成间隙;电机,所述电机包含电机定子、电机转子和输出轴,所述电机定子固定装配在所述电机装配腔内,所述电机转子装配在所述电机装配腔内与所述电机定子相转动;所述输出轴与所述电机转子相固定,所述输出轴与所述整机安装面基本平行;电池包,所述电池包安装于所述壳体内为所述动力头提供能量。本申请的动力头结构紧凑合理、装配便捷,安装方便,可以替代现有的汽油引擎发动机,解决现有发动机振动大、噪音大、污染严重等问题。

Description

一种动力头及动力系统 技术领域
本申请涉及动力头领域,具体涉及一种动力头及动力系统。
背景技术
现有的动力工具尤其是园林工具的动力装置分为两大类,一是以汽油或柴油等燃料作为能源的发动机,另一种是以电池作为能源的电机,燃油引擎发动机有着操作不便、振动大、噪音大、污染严重并且汽柴油存储存在安全隐患的问题,因此现有的动力头逐渐被锂电池驱动电机的动力头所替代。
锂电池驱动的电机具有污染小、噪音小、便于操控的优点,随着对环保的重视,倡导绿色、环保、减碳的生活和工作方式。为了满足较大功率工具的使用要求,现有的锂电池驱动电机整机装配在动力头上,外转子电机整机需要装配在保护的腔体内,由此带来热量集中、散热困难、装配复杂等问题。基于上述问题,需要一种结构合理、装配方便、散热效果好的锂电池驱动的动力头。
发明内容
鉴于以上现有技术的缺点,本申请提供一种动力头,以改善现有的动力头结构不合理、热量集中、散热困难、装配复杂等技术问题。
为实现上述目的及其它相关目的,本申请提供一种动力头。包括:电机支架,所述电机支架内设有电机装配腔,所述电机支架底部设置有整机安装面;壳体,所述壳体固定于所述电机支架的上方,所述壳体与所述电机支架间形成间隙;电机,所述电机包含电机定子、电机转子和输出轴;所述电机定子固定装配在所述电机装配腔内,所述电机转子装配在所述电机装配腔内与所述电机定子相转动;所述输出轴与所述电机转子相固定,所述输出轴与所述整机安装面基本平行;电池包,所述电池包安装于所述壳体内为所述动力头提供能量。
于本申请一示例性实施例中,所述电机支架一体成型,所述电机支架包括设置有所述电机装配腔的电机装配部、设置于所述电机装配部下方的整机安装部、设置于所述电机装配部侧面的电池支撑部;所述电池包设置于所述电池支撑部的上方。
于本申请一示例性实施例中,所述电机装配部上设有安装块,所述安装块与所述壳体的底面相固定,所述间隙设置于所述壳体与所述电机装配部的外壁之间;所述壳体内设有供控制模块安装的第一容纳腔,所述第一容纳腔设置于所述电机装配腔的上方;所述第一容纳腔与所述电机装配腔通过设置于壳体的第二内通口、设置于电机支架的第一内通口相连接,所述壳体与所述电机装配腔壁通过安装块、内通口接触。
于本申请一示例性实施例中,所述电机支架还包括有加强支撑部,所述加强支撑部的一端设置于所述整机安装部,另一端设置于所述电池支撑部的底面。
于本申请一示例性实施例中,所述动力头重心位于所述动力头垂直于所述输出轴中心面的左右偏置面之间,左右所述偏置面与所述中心面的距离不大于所述动力头宽度的百分之十五。
于本申请一示例性实施例中,所述动力头重心纵向方向位于所述电机装配腔与所述壳体之间。
于本申请一示例性实施例中,所述动力头重心位于所述电机装配腔外壁与所述电池包之间。
于本申请一示例性实施例中,所述电机的最大输出功率范围为3kW~5kW;所述电池包能够装配于手持式电动工具,为所述手持式电动工具供能;所述电池包包含至少一组电芯,所述电芯为串联连接,所述电芯的最大输出功率≤2kW;所述电池包的电压为80~82V;所述动力头和被动力头驱动的电动工具之间设置有控制线,根据所述电动工具的状态,控制所述动力头的启停。
于本申请一示例性实施例中,所述电机装配腔通过第一外通口与外界空气连通;所述壳体内设有装配控制模块的第一容纳腔,所述第一容纳腔上设有第二外通口;散热风路,所述散热风路依次连通所述第一外通口、所述电机装配腔、所述第一容纳腔、所述第二外通口。
于本申请一示例性实施例中,所述散热风路内设有第一风扇,所述第一风扇设置于所述电机转子的输出轴上。
于本申请一示例性实施例中,所述第一风扇设置于所述输出轴的尾端、所述第一外通口的顶部,外界空气经由第二外通口进入所述第一容纳腔,流经所述电机装配腔装配的线圈绕组后,由第一风扇驱动经第一外通口排出;所述散热风路中设有第二风扇,所述第二风扇设置于所述第一容纳腔的侧壁,所述第二风扇的出风方向与所述第二外通口的通风方向垂直。
于本申请一示例性实施例中,所述第一风扇设置于所述输出轴的前端,所述第一容纳腔与所述电机装配腔分设于所述散热风路中所述第一风扇的两侧。
于本申请一示例性实施例中,所述散热风路包括有第一内通口、第二内通口;
所述第一内通口设置于所述电机装配腔远离所述第一外通口一侧的顶部;
所述第二内通口与所述第一内通口连通,所述第二内通口设置于所述第一容纳腔远离第二外通口一侧的底部。
于本申请一示例性实施例中,所述第一外通口向下贯穿所述电机支架,所述电机支架的底面侧壁设有通风开槽,所述第一外通口通过所述通风开槽与外界空气连通;所述第二外通口设置于所述壳体的底面。
于本申请一示例性实施例中,还包括:减震装置,所述减震装置包括减震垫;其中,所述壳体与所述电机支架通过所述减震装置相连接,所述减震垫设置于所述壳体与所述电机支架之间。
于本申请一示例性实施例中,所述减震装置包括两个螺纹杆,两个所述螺纹杆分别设置在减震垫的两侧,并分别与两侧对应的所述壳体和所述电机支架相连接;所述电机支架上设有第一螺纹孔,所述壳体上设有第一通孔,所述减震垫一侧的所述螺纹杆与所述第一螺纹孔配合,所述减垫另一侧的所述螺纹杆贯穿第一通孔后螺纹连接第一螺母。
于本申请一示例性实施例中,还包括:功能接口,当所述功能接口连接外部充电器时,所述外部充电器能够对所述电池包充电;当所述功能接口连接外部拓展电池包时,所述拓展电池包能够与所述电池包共同为所述电机提供电能。
于本申请一示例性实施例中,还包括控制模块,当所述功能接口连接外部拓展电池包时,所述控制模块读取所述拓展电池包信息与所述电池包信息,以控制所述拓展电池包与所述电池包的工作状态,所述工作状态包括:所述拓展电池包与所述电池包共同放电、所述拓展电池包独立放电;所述拓展电池包与所述电池包的信息包括电池电压、温度、放电电流。
于本申请一示例性实施例中,初始工作时,所述拓展电池包与所述电池包电压差不大于第一阈值时,所述拓展电池包与所述电池包共同放电;所述拓展电池包与所述电池包电压差大于第一阈值时,所述拓展电池包与所述电池包中电压较高者先放电,直至电压差不大于第二阈值时,待放电电池包共同放电。
于本申请一示例性实施例中,所述电池包未安装或处于不可用状态时,所述拓展电池包独立放电,所述控制模块通信告知后级驱动板所述拓展电池包的信息,所述后级驱动板根据所述拓展电池包的信息调整输出功率。
于本申请一示例性实施例中,所述控制模块检测所述电池包插入数目,若只插入一个所述电池包,则对插入的所述电池包进行充电;若插入两个所述电池包,判断两个所述电池包电压差,若两个所述电池包电压差处于第三阈值范围内时,所述拓展电池包对两个所述电池包同时充电;若两个所述电池包压差超出第二阈值范围时,对其中低电压的所述电池包进行充电,直至两个所述电 池包电压差处于第四阈值范围内时,对两个所述电池包进行同时充电。
本申请还提供一种动力系统,包括上动力头和外接设备;动力头包括:
电机支架,所述电机支架内设有电机装配腔,所述电机支架底部设置有整机安装面;
壳体,所述壳体固定于所述电机支架的上方,所述壳体与所述电机支架间形成间隙;
电机,所述电机包含电机定子、电机转子和输出轴;
所述电机定子固定装配在所述电机装配腔内;
所述电机转子装配在所述电机装配腔内与所述电机定子相转动;
所述输出轴与所述电机转子相固定,所述输出轴与所述整机安装面基本平行;
电池包,所述电池包安装于所述壳体内为所述动力头提供能量;
所述外接设备包含拓展电池包和/或外部充电器,所述外部充电器包括AC/DC充电器、太阳能逆变器和DC/DC充电器中的至少一种;
其中,当所述功能接口连接外部充电器时,所述外部充电器能够对所述电池包充电;
当所述功能接口连接外部拓展电池包时,所述拓展电池包能够与所述电池包共同为所述电机组件提供电能。
本申请的有益效果在于:
本申请的动力头排布方式与现有的排布方式具有非常大的不同,本申请的壳体内设有电机装配腔,电机装配腔内直接装配有电机转子、电机定子,壳体既是电机的壳体,又是整个动力头的壳体,从而有效的提高电机的散热能力,解决了现有的热量集中在保护腔内的问题。本申请的动力头结构紧凑合理、装 配便捷,安装方便,可以直接替代现有的汽油引擎发动机,解决现有的发动机振动大、噪音大、污染严重等问题。
附图说明
为了更清楚地说明本申请实施例或现有技术中的技术方案,下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍,显而易见地,下面描述中的附图仅仅是本申请的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据这些附图获得其他的附图。
图1为本申请一示例性动力头立体示意图;
图2为本申请一示例性动力头结构示意图;
图3为本申请一示例性动力头主视图;
图4为本申请一示例性动力头后视图;
图5为本申请一示例性动力头俯视图;
图6为本申请一示例性动力头左视图;
图7为本申请一示例性动力头部分结构示意图;
图8为本申请一示例性动力头部分结构立体图;
图9为本申请一示例性动力头部分结构另一角度示意图;
图10为本申请一示例性电机支架示意图;
图11为本申请一示例性电机支架俯视图;
图12为本申请一示例性电机支架立体图;
图13为本申请一示例性壳主体示意图;
图14为本申请一示例性壳主体部分结构示意图;
图15为本申请图3中A-A截面剖视图;
图16为本申请图15中B区域放大图;
图17为本申请一示例性动力头的立体示意图;
图18为本申请一示例性动力头的后视图;
图19为本申请一示例性动力头的仰视图;
图20为本申请一示例性动力头沿竖直方向切削后立体示意图;
图21为本申请一示例性动力头沿竖直方向切削后示意图;
图22为本申请另一示例性动力头沿竖直方向切削后立体示意图;
图23为本申请另一示例性动力头沿竖直方向切削后示意图;
图24为本申请一示例性动力头部分结构立体图;
图25为本申请一示例性动力头部分结构示意图;
图26为本申请一示例性电机支架示意图;
图27为本申请一示例性电机支架立体图;
图28为本申请一示例性动力头的结构示意图;
图29为本申请一示例性的减震装置示意图;
图30为本申请一示例性实施例的部分结构示意图;
图31为本申请一示例性实施例的部分结构立体图;
图32为本申请一示例性电机组件俯视图;
图33为本申请一示例性壳体部分结构示意图;
图34为本申请一示例性壳体部分结构立体示意图;
图35为本申请一示例性壳体部分结构俯视图;
图36为本申请一示例性电池安放结构示意图;
图37为本申请一示例性动力头结构示意图;
图38为本申请一示例性动力头立体示意图;
图39为本申请一示例性动力头主视图;
图40为本申请一示例性动力头部分结构示意图;
图41为本申请一示例性动力头电池组件工作原理框图。
具体实施方式
以下通过特定的具体实例说明本申请的实施方式,本领域技术人员可由本说明书所揭露的内容轻易地了解本申请的其它优点与功效。本申请还可以通过另外不同的具体实施方式加以实施或应用,本说明书中的各项细节也可以基于不同观点与应用,在没有背离本申请的精神下进行各种修饰或改变。需说明的是,在不冲突的情况下,以下实施例及实施例中的特征可以相互组合。还应当理解,本申请实施例中使用的术语是为了描述特定的具体实施方案,而不是为了限制本申请的保护范围。下列实施例中未注明具体条件的试验方法,通常按照常规条件,或者按照各制造商所建议的条件。
请参阅图1至图6,图1~图6示出了一示例性动力头结构,为了解决现有的燃油发动机工具振动大、噪音大、污染大的问题,本申请的动力头与整机工具的安装结构兼容燃油发动机的安装结构,可以实现动力头与燃油发动机的替换,无需更换整机工具,本申请动力头可以满足工具功率、转速、转动方向等要求。
动力头包括有电机支架100、壳体200,电机支架100内设有电机装配腔110,其中电机装配腔110内装配有电机转子300、电机定子400,输出轴310部分伸出电机装配腔110外,壳体200内设有电池包226,电池包226为动力头提供能量。
电机支架100为一体成型的铝合金壳体,电机支架100既作为动力头的支 架,又是作为电机的外壳,是一个集成支架,能将整机与部件之间的连接合二为一。电机支架100选用铝合金材质,一方面有利于电机散热,另一方面可以保证支撑稳定、坚固,提高使用寿命;电机支架100一体成型,减少螺栓等装配步骤,提高装配效率,保证动力头结构稳定,减少长期振动环境造成装配松动问题的出现。
请参阅图10~图12,图10~图12示出了一种示例性的电机支架示意图,电机支架100包括有电机装配部118、整机安装部120、电池支撑部130。
请参阅图7,图7示出了一示例性的动力头部分内部结构,电机装配部118内设有电机装配腔110,电机装配腔110内装配电机转子300、电机定子400、输出轴310等组件,本申请一示例性实施例中,电机为外转子电机,即电机转子300位于电机定子400外围绕输出轴310转动,可以满足更大功率的要求。电机的额定功率为2kW~4kW,电机的最大输出功率范围是3kW~5kW。在一实施例中,电机的额定功率为2.9kW,最大输出功率为3.6kW。电机的转速为2000~4000rpm,在一实施例中,电机的转速可以调节,包括2800rpm、3200rpm、3600rpm。
电机装配腔110的前端螺栓固定有前端盖114,前端盖114中心处设有贯穿前端盖114的中心孔,中心孔内装配有轴承,输出轴310与轴承过盈配合,输出轴310贯穿前端盖114部分伸出电池装配腔内,以便于进行与传动机构连接,一实施例中,输出轴310与燃油发动机的输出轴规格相同,可以配合齿轮、皮带等方式传动,一示例性实施例中,输出轴310到底面的距离为90~120mm,输出轴310的直径为18mm~22mm,便于与现有的燃油发动机进行直接更换。
前端盖112上设有安装孔,安装孔的数量为4个,其中四个以正方形排列的方式排布在输出轴310的周围,前端盖112通过安装孔安装在电机支架100上,提高安装牢度,本申请一示例性实施例中,安装孔的空心距离输出轴310轴线的投影距离为40~50mm,根据实际需要进行调整。
电机装配腔内设有后端板116,后端板116中心处也设有中心孔,后端板116中心孔内设有轴承,轴承与输出轴310配合,通过两个轴承对输出轴310进行支撑。本申请一实施例中,后端板116上设有若干后通风孔117,若干后通风孔117绕输出轴310轴线圆周阵列,便于电机装配腔110内空气流通散热,避免热量堆积造成电机损坏。
电机装配腔110的尾部固定有后封闭盖115,后封闭盖115与后端板116之间围成有风扇腔,风扇腔内装配有第一风扇600,第一风扇600与输出轴310相固定,输出轴310转动时带动第一风扇600同步转动,为电机装配腔110进行主动散热,同步转动保证散热稳定。一实施例中,第一风扇600靠近后封闭盖115的一端为圆形板,圆形板与第一风扇600扇叶相配合,改变气流方向,使得气流沿着预设的方向向下经第一外通口111排出。现有的电机散热一般为向电机内吹风进行散热,本申请的第一风扇600靠近第一外通口111,散热方式为向电机装配腔110外部吹风,带动电机装配腔110的气流流动,气流流动速度更快,散热更为高效。
电机装配腔110的两端分别设有第一内通口112、第一外通口111,第一内通口112与第一外通口111分设在电机装配腔110的两端,保证冷风流经整个电机装配腔110,进行有效散热。
本申请一实施例中,第一外通口111设置于电机装配腔110的底部,第一风扇600的正下方,第一风扇600将电机装配腔110内的气流经由向下的第一外通口111排出,相较于直接设置在端部平行于输出轴310设置的出风口,向下设置的第一外通口111可以减少雨水、尘土等由第一外通口111进入到电机装配腔110内,对电机造成损坏。第一外通口111向下贯穿整机安装部120,整机安装部120的侧壁底部设有通风开槽113,通风开槽113与第一外通口111连通,保证第一外通口111出风顺畅,保证散热效果。
一实施例中,第一内通口112设置在电机装配腔110的顶部,确保冷风流 经整个电机装配腔110。电机支架100一体成型,若直接由加工中心加工出第一内通口112,加工难度较大、精度难以保证,通过将第一内通口112一分为二,一部分设置在电机装配腔110的端部、另一部分设置在前端盖114上,前端盖114装配在电机装配腔110上后,两部分组成完整的第一内通口112,两部分的开口均为开放式加工,加工难度更低。
整机安装部120设置于电机装配部118的底部,动力头通过整机安装部120安装在工具整机上。本申请一实施例中,整机安装部120的底面为长方形的整机安装面121,用于将动力头安装固定在工具整机上,整机安装面121的尺寸与现有的汽油发动机尺寸相同,以方便进行更换替代。整机安装面121上设有若干的第二通孔124,第二通孔124可以容纳螺栓通过,通过第二通孔124与螺栓将整机安装部120安装在工具整机上,安装简单、操作快捷,本申请的第二通孔124匹配现有的工具整机,便于在不更换整个动力工具的前提下,仅更换燃油发动机。作为优选,第二通孔124为设置于整机安装面121上腰型孔,设有四个,其中两个为腰型孔,两个为圆形孔,腰型孔的半径为4~6mm,两个半圆圆心之间的距离为14~16mm,圆形孔半径为4~6mm,整机安装面的根据现有的燃油发动机安装尺寸进行调整,以便于替换。电机的输出轴即输出轴310所在轴线与整机安装面121平行。在一实施例中,整机安装面121安装在整机上后,整机安装面121与地面平行,在另一实施例中,整机安装面121安装在整机上后,整机安装面121与地面垂直,此时输出轴310的轴线也与地面垂直。需要说明的是,输出轴310的角度根据整机安装面121与整机安装的位置决定,输出轴310轴线与地面除平行、垂直外,也可以有其他角度。
请参阅图26,一实施例中,整机安装面121与电机转子的输出轴基本平行,优选平行。第一外通口111由电机装配腔110向下贯穿整机安装部120,通风开槽113设置在整机安装部120的侧面底部,第一外通口111与通风开槽113相连通。一实施例中,整机安装部120内设有竖直方向的镂空,镂空处向下贯 穿整机安装部120,作为优选,若干镂空处之间形成加强筋123,加强筋123围成截面为长方形、正方形、三角形或菱形等框形,加强筋123围成区域的外围通过另外的加强筋123连接至整机安装部120的内壁,保证了加强筋123的一体性,提高整机安装部120的强度,从而既保证了整机安装部120可以稳定的对动力头提供支撑,又便于电机装配腔110通过下壁进行散热,镂空处理在保证承载强度的前提下,还可以降低重量,节约材料,节约成本。一实施例中,通风开槽113低于加强筋123设置,即镂空处与外界气体连通。当第一外通口111的气流通过通风开槽113向外流出时,第一通风口的底端出现文丘里效应,从而带动镂空处的空气流动,电机安装腔下壁处的热量通过热对流的形式随同第一外通口111的气流共同流出通风开槽113,从而实现电机安装腔下壁的散热要求,保证电机安装腔内装配组件的散热需要。
动力头与整机(例如,空压机,清洗机或扫雪机等被动力头驱动的电动工具)之间设置有控制线,控制线用于接收整机的工作状态,例如空压机的空气压力是否达到阈值,清洗机的水压达到阈值等,若达到阈值,则向动力头发出信号,动力头自动停止,处于待机状态,当压力降低至设定值后,向动力头发出信号,动力头重新启动。
电池支撑部130设置在电机装配部118的侧面,电池支撑部130主要用于对电池包226进行支撑,电池包226高度较高,电池支撑部130设置于电机装配部118的侧面,动力头组装完成后整体外形大致呈长方体形。
请参阅图10、图17、图39,示例性的,电机支架100的侧面为电池支撑部130,电池支撑部130与电机支架100主体呈“Z”字形,电池支撑部130设有开口竖直向上的安装腔,安装腔与壳体200的电池连接部220固定连接。作为优选,电池连接部220与电机支架100主体之间设有间隙,即电池连接部220与电机支架100侧面之间设有间隙,便于空气流通,有利于电机支架100的侧壁进行散热。
为了进一步的提高电机装配腔110的散热能力,一实施例中,电池支撑部130与电机装配腔110外侧壁使用多点间隔固定,电池支撑部130与电机装配腔110外侧壁通过一定间隔的两点或多点进行连接,通过减少电机装配腔110外侧壁与其他部件的接触面积,电机装配腔110外壁空气可以流动通过热对流的方式将对电机装配腔110的腔壁进行降温,提高电机装配腔110对其内装配的各部件的散热效果。
电池支撑部130与电机装配腔110的侧壁一体成型,电池支撑部130位于电机装配部118的侧面导致底部处于悬空状态,为了保证电池支撑部130的承载能力,避免冲击情况下电池支撑部130受力较大与电机装配部118发生受损、分离等问题出现,一实施例中,整机安装部120上设有加强支撑部140,加强支撑部140的底部与整机安装部120相接触,加强支撑部140的顶部支撑在电池支撑部130的底面,加强支撑部140倾斜设置,以对电池支撑部130进行有效的支撑,保障在振动等复杂工况下对电池包226提供稳定支撑。
一实施例中,电池支撑部130的底面设有包围型围挡,围挡分设在电池支撑部130底面的非靠近电机装配部118的三个边,通过设置围挡131对电池包226所在区域进行进一步的支撑,避免在振动或冲击的情境下,电池包226发生倾倒;壳体200上设有与围挡相适应的凹陷部,凹陷部向壳体200内凹陷,凹陷部与围挡顶面接触的位置形成有台阶,通过台阶与围挡顶面的平面接触,可以进一步的对壳体200提供支撑,避免壳体200晃动或倾倒。
为了进一步的减轻动力头的重量,一实施例中,电池支撑部130的底面设有若干减重孔,实现减重设计,在保证电池支撑部130强度的前提下,对电池支撑部130进行减重,减重孔还有利于电池底部进行散热。示例性的,电池支撑部130底部的减重孔为长条孔,在保证电池支撑部130负载强度的情况下,便于电池包226通过电池连接部220散热。
动力头还包括有壳体200,壳体200固定在电机支架100的上部,请参阅 图13~图14,壳体200内设有第一容纳腔210、第二容纳腔221,第一容纳腔210内装配有控制板等控制组件211,控制组件211与底壳上装配的开关电路连接,电池包226可拆卸安装在第二容纳腔221内,电池包226与控制组件211、电机电连接,为电机转动提供能量。
壳体200优选塑料壳体200,塑料壳体200一方面可以降低动力头的重量,便于操控,另一方面,可以对壳体200内装配的部件提供缓冲,当跌落或收到较大冲击时,避免壳体200内装配的部件受损。
请参阅图3、图4、图6,壳体200与电机支架100固定连接,本申请一实施例中,电机装配部118与壳体200之间设有空隙900。电机装配部118上设有安装块150,安装块150与壳体200底面相固定连接。第一容纳腔210与电机装配腔110通过设置于壳体的第二内通口213、设置于电机支架100的第一内通口112相连接,壳体200与电机装配部118之间,除了安装块150、内通口接触外,其余位置均不接触。电机装配部118及电机装配部118内装配的各组件构成一个外置电机,可以有效的保证电机装配腔110内装配的各组件可以通过电机装配部118的侧壁进行散热,提高散热能力,避免热量堆积,提高动力头的使用寿命。
壳体200上设置有操作面板,操作面板上设置有电源开关,可以控制该动力头的通断。在电源开关一侧,设置有速度选择开关,速度选择开关为薄膜开关,设置有低、中、高三种转速,操作者依次按压速度选择开关,可以在低、中、高三种档位之间切换。操作面板上还设置有显示电池包电量的显示装置,能够实时显示电池包的剩余电量。
一实施例中,第一容纳腔210设置于电机装配部118的上方,第二容纳腔221设置于电池支撑部130的顶部,一方面电池包226的高度较大,通过将第一容纳腔210设置于电机装配部118的上方,动力头的整体布局更为合理。另一方面,电机装配部118内装配有电机转子300、电机定子400等,重量较大, 壳体200内的电池包226侧重量更大,通过电池包226与电机装配部118近乎水平排布的方式,使得动力头的重量分布更为均匀,操作更加方便。
请参阅图5,于一实施例中,动力头的重心投影位于动力头中心面的左右偏置面之间,左右偏置面与中心面的距离不大于动力头宽度的百分之十五。当动力工具进行工作时,动力头的重心投影位于左右偏置面之间更便于使用者进行操作。作为优选,动力头的重心投影位于动力头的中心面上,中心面为垂直于输出轴310的动力头中心面。
为了进一步的提高操作的便利性和工具的稳定性,重心纵向方向位于所述电机装配腔110与所述壳体之间,作为优选,重心位于电机装配部的上方,第一容纳腔所在壳体的下方。在左右方向上,动力头的重心位于电机装配部与电池包之间,三个方向对动力头的重心进行限定,便于工具进行操作。
壳体200包括有壳主体222、顶盖230、翻转盖223,为了减轻整机重量、降低成本,壳体200优选塑料材质,既方便加工、成本低,又可以在振动或冲击时,为壳体200内装配的零部件提供缓冲,避免零部件受损。请参与图13~图14,一实施例中,壳主体222设有两个竖直方向的开放腔;顶盖230与壳主体222通过螺钉或螺栓固定连接形成有第一容纳腔210。
对于控制板等电子元器件,工作运转过程中会产生大量热量,若热量不能及时散出,就会导致电子元器件温度过高受损或影响控制操作。为了提高控制组件211所在第一容纳腔210的散热能力,一实施例中,第一容纳腔210的底部设有第二外通口212、第二内通口213,第二外通口212与第二内通口213分设在第一容纳腔210的底部两侧,即第二外通口212与第二内通口213设置在控制组件211的两侧,第二外通口212与第二内通口213之间的气流方向与控制板等元器件平行或基本平行,从而保证第二外通口212进入的冷风流经控制组件211后由第二内通口213流出第一容纳腔210,提高第一容纳腔210的散热能力。
为了提高动力头整体的散热能力,对控制组件211、电机等各部件进行统筹协调散热。本申请一实施例中,动力头包括散热风路,请参阅图20~图21,散热风路500的两端分别为设置在电机装配腔110底端的第一外通口111、设置在壳体200底部的第二外通口212。本申请一实施例中,第一外通口111设置于电机装配腔110远离前端盖114一侧的底部。前端盖114一侧需要连接传动组件,空间布置更加的紧凑,远离前端盖114的一侧结构较少,具有较大的散热空间,有利于提高散热能力。第一外通口111向下贯穿电机支架100,电机支架100的侧壁底部设有通风开槽113,第一外通口111通过通风开槽113与侧向空气连通,通风方向与输出轴310平行或基本平行。
第二外通口212设置于壳体200的底部,第一容纳腔210处的壳体200与电机支架100连接处设有空隙,以便于第二外通口212处空气流动。
第一外通口111通过通风开槽113与侧向空气连通,相较于现有的直接由电机端部进行侧向通风,一方面可以提高通风开槽113与第二外通口212之间的距离,避免热风被重新吸入到动力头内部;另一方面,第一外通口111向下贯穿电机支架100,通过侧向的通风开槽113与空气连通,第二外通口212设置于壳体200的底部,也可以避免雨水通过第二外通口212进入到第一容纳腔210内,提高防水能力。
散热风路500还包括有设置于电机装配腔110顶端的第一内通口112、设置于壳体200底部的第二内通口213,第一内通口112与第二内通口213相接触连通。通过第一内通口112与第二内通口213实现电机装配腔110与第一容纳腔210的连通,从而有利于动力头集中散热,更好的保证散热的效率。
本申请一实施例中,第一内通口112设置于远离第一外通口111一侧的顶部,从而保证散热风路500内空气流动是可以贯穿整个第一容纳腔210,空气流经线圈绕组,提高散热效果。
一实施例中,第二内通口213设置于远离第二外通口212的壳体200底部, 保证散热风路500内空气流动贯穿第一容纳腔210,对控制模块211的各元器件进行充分散热。
散热风路500内设置有第一风扇600,第一风扇600驱动空气流动,从而提高散热风路500内空气流动的速度,提高散热效率。请继续参阅图20、图21,本申请一实施例中,第一风扇600设置于输出轴310上,具体设置于输出轴310远离前端盖114的一侧、第一外通口111的顶部,该第一风扇600优选离心风扇。第一风扇600时设置于输出轴310上,电机转动时第一风扇600同步转动,从而保证散热的稳定性,电机停止转动时第一风扇600立即停止转动,可以节能降耗,避免第一风扇600无效转动。工作时,第一风扇600转动驱动空气由第一外通口111向外排出,从而带动外界空气由第二外通口212向第一容纳腔210内流动,经第二内通口213、第一内通口112后向电机装配腔110内流动,经由线圈绕组后再由第一风扇600驱动向外界排出。原有的散热方式通常为向需要散热的部分进行吹风,从而带动气流向待散热区域流动,本申请通过由第一风扇600向外界吹风,从而使得待散热区由外界吸入空气,使得气流的流速更快、流动方向及速度更加的稳定,保证稳定、持续的散热效果。
第一风扇600的后侧面设有风叶挡板601,风叶挡板601可以改变气流方向,保证气流由流经电机装配腔110的横向改为平行于第一外通口111的纵向,避免气流继续向输出轴310的尾部流动,以减少涡流的出现,保证散热风路500内气流流通的稳定性,保证散热的稳定性。
另一示例性的散热风路,第一风扇600设置于输出轴310上,具体设置于输出轴310靠近前端盖114的一端、第一内通口112的底部,该第一风扇600优选轴流风扇。工作时,气流可以先经第一外通口111流入到电机装配腔110内,而后由第一风扇600驱动向第一容纳腔210内流动,最后经由第二外通口212流出,外界空气被吸入到待散热区,保证散热稳定。
控制组件211、电池包226等均会产生热量,第一容纳腔210与第二容纳 腔221的腔体较大,为了提高第一容纳腔210、第二容纳腔221的散热能力,本申请一实施例中,第一容纳腔210靠近第二外通口212的一侧侧壁装配有第二风扇214,第二风扇214的吹风方向与第二外通口212垂直或斜向上倾斜,通过第二风扇214一方面可以加速气流的流动速度,另一方面可以改变气流的运动方向,使得气流可以流经更大范围,保证充分散热。
示例性的,第二风扇214驱动的气流流动方向与散热风路500内气流流动的方向一致。即当气流由第二外通口212流入时,第二风扇214吹风方向为垂直于第二外通口212风向向第一容纳腔210内,当气流由第二外通口212流出时,第二风扇214吹风方向平行于第二外通口212风向向第二外通口212方向吹风。散热风路500较长,通过设置第二风扇214可以明显提高气流流动速度,提高散热效果。
第二内通口213与第一内通口112连通,由第一风扇600向第一外通口111吹风,带动冷风由第二外通口212进入第一容纳腔210,经由第二内通口213、第一内通口112进入到电机装配腔110,最后经由第一外通口111、通风开槽113流出,通过第一风扇600向外吹风带动气流散热。
请参阅图24、图25,一实施例中,第一容纳腔210内装配有控制板及其他电子元器件,控制板及其他电子元器件通过螺钉固定在第一容纳腔210内,控制板及其他电子元器件呈平行于输出轴310方向排布,形成有若干横向贯穿第一容纳腔210的通道,若干通道为散热风道的组成部分。散热风道横向分割控制模块211,使得气流由控制模块211中流动,保证控制模块211的控制板及其他电子元器件均能有效散热,避免出现局部热量聚集的问题。散热风道横向贯穿第一容纳腔210,气流通道畅通,减少过多弯折导致气流流速降低,减少涡流的出现,提高气流的流动速度,提高散热效率。
一实施例中,第一容纳腔210底部的壳体200与电机支架100的顶部之间设有空隙;电机支架100的顶部侧面设有两个安装块150,电机支架100通过 延伸出的安装块150与壳体200进行固定连接,保证电机支架100的顶部与第一容纳腔210底部的壳体200之间有空隙。铝合金一体成型的电机支架100具有良好的导热性能,电机装配腔110的侧壁可以直接进行热量的排放,通过在壳体200与电机支架100的顶部之间设置空隙,避免塑料壳体200影响到电机支架100的散热,也减少电机支架100散出的热量通过热传导的形式传递到塑料壳体200上,从而有效的提高了第一容纳腔210、电机支架100的散热效率。
动力头安装在工具整机上使用,工具整机的环境一般较为恶劣,如各种切割操作会造成小碎屑飞溅、尘土飞扬等,尤其是第二外通口212处向内进风,容易带动碎屑、尘土等跟随冷风进入到动力头内。本申请一实施例中,第二外通口212处安装有过滤装置700,过滤装置700用于过滤冷风中的碎屑、尘土等,避免碎屑、尘土等进入到动力头内导致动力头受损或散热效果降低等问题。
一实施例中,第二外通口212处为壳体200向第一容纳腔210内凹陷并形成格栅样进风口,凹陷部安装有过滤网,过滤网可以有效的过滤掉冷风中的碎屑、尘土等。凹陷部的底面可拆卸固定有格栅板,格栅板与凹陷部采用快拆结构,如凹陷部设有卡口,格栅板的边缘设有V型口的卡块,卡块与卡扣相配合。格栅板在不影响进风的前提下,可以阻挡较大的碎屑、石子等破坏过滤网,也可以对过滤网进行限制,防止过滤网脱落,快拆结构可以更便于更换过滤网,提高维保的效率。
请参阅图13~图14,壳主体222另一个竖直向上的开放腔内配合翻转盖形成第二容纳腔221,第二容纳腔221内装配电池包226,第二容纳腔221的底部设有与电池包226电连接的端子,该端子与控制组件211、电机相连接,通过该端子实现电池包226快速接入动力头电路。第二容纳腔221的背部为隔板,隔板一方面分割第一容纳腔210与第二容纳腔221,另一方面可以利用隔板直接固定部分控制组件211,实现结构的合理布置。
一实施例中,壳体200内至少可装配两个电池包226,两个电池包226可 以为同型号或不同型号,本申请对此不做限制,可以根据动力头的使用要求选择相应型号的电池包226,为动力工具提供动力。两个电池包500为并联连接,可以增加动力头的功率。在其他实施例中,两个电池包500可为串联连接,提供动力头的工作电压。两个电池包500也可依次对外放电,当一个电池包500电量耗尽后,另外一个电池包500开始对外放电,增加电量存贮,延长工作时间,具体根据实际需要进行调整即可。
在一实施例中,两个电池包226分设在动力头前进方向的两侧或沿前进方向前后设置,两个电池包226间隔设置,在一实施例中,两个电池包226之间三分之一至三分之二区域内设置隔板,其他区域之间为空隙,通过设置隔板、空隙,避免两个电池包226之间热量堆积,提高散热能力,保障电池包226工作温度正常。进一步的,电池连接部220的底部设有弹簧,电池连接部220的侧壁设有电池锁定件225,当电池包226插入到电池连接部220内时,弹簧被压缩,电池锁定件225锁定,将电池包226锁定在电池连接部220内。当电池锁定件225解锁后,在弹簧的弹力作用下,电池包226被弹出,有利于电池包226的快速取放,提高更换速度。
在一实施例中,电池包226内部设置有至少一个电芯组,一个电芯组包括多个电连接的电芯。电芯串联或并联从而得到所需要的电压。本申请的动力头用于替代常用的汽油机,如上所述,动力头的输出功率为2kw~4kW,为了保证动力头的输出,电池包的电压为80~82V,电池包226中电芯串联,电芯的电压为3.6V,一串电芯的数量为22~23个。电池包226中可以具有超过一串的电芯串,各个电芯串的电芯数量相等,电芯串之间并联。在一实施例中,电芯串的数量为1~3个。当两个电池包226并联对外放电池,动力头由2~6个电芯串供电,保证即使动力头达到最大输出功率,电芯的放电电流仍处于安全阈值范围内。为了保证电池包226运行的安全性和散热效果,每个电芯串的输出功率小于等于2kW。
在一实施例中,所述电芯可以为锂电芯。电池包226能够被用户从动力头上拆卸下来,拆卸后的电池包226可以安装至其他的手持式电动工具中,为手持式电动工具提供能量,也就是说,本申请中的电池包226不仅可以应用到动力头中,还可以应用到其他手持式工具中,其他手持式工具中的电池包226也可以应用到本申请的动力头中,从而提高了电池包的适配性能,也提高了动力头适配电池包226的能力。需要说明的是,手持式电动工具可以为打草机、修枝机及吹风机等花园类工具,也可以是电钻、电锤等扭力输出类工具,还可以是电圆锯、曲线锯及往复锯等锯类工具,还可以是角磨机、砂光机等研磨类工具。一实施例中,电池包226还可以为手推式电动工具供电,例如手推式割草机、手推式扫雪机等。
一实施例中,翻转盖223与壳主体222转动连接,用于开启和关闭第二容纳腔221,以便于更换电池包226。进一步的,壳主体222的隔板顶部设有轴固定座,轴固定座上设有平行于壳主体222隔板的转动轴,翻转盖223通过转动轴与电池仓转动连接。翻转盖223与电池连接部220转动连接可以方便对电池包226进行快速的取放,也对电池包226提供防水、防尘保护,延长电池包226的使用寿命。翻转盖223与电池连接部220的转动角度通过限位卡槽限定,具体根据电池包226的实际情况进行调整,本申请对此不作限定。
一实施例中,为了保证使用过程中,在振动等复杂工况下翻转盖223不会自动打开,仅在需要更换电池包226等需要开启时快速打开。翻转盖223与壳主体222之间设有锁扣224。
锁扣224包括相对转动的第一转动板、第二转动板,其中第一转动板转动连接在电池连接部220的前端,第一转动板绕电池连接部220上的转轴进行旋转。第一转动板远离电池连接部220转轴的一端转动连接有第二转动板,第二转动板靠近第一转动板的一端设有卡位部,翻转盖223的前端设有与卡位部相配合的卡槽。当锁扣224处于打开状态时,第一转动板与第二转动板位于电池 连接部220外壁的前端呈自然下垂状态。需要扣合时,转动第一转动板至竖直向上,然后转动第二转动板,直至卡位部转动插入至弧形的卡槽内,实现锁止,翻转盖223与电池连接部220之间相对固定。一实施例中,电池连接部220为壳主体222的一部分,换言之,锁止后,翻转盖220与壳主体222之间相对固定。
工具整机的使用过程中,工况繁杂,大多数情况下均属于较为恶劣的工况,会产生较大的振动。而动力头的主要振动来源包括电机自身转动造成的振动和工具整机传递来的振动,不管是哪种振动,均是由电机支架100向壳体200传递振动。壳体200中装配着容易受损的控制组件211及电池包226,振动强度过大容易造成破坏。请参阅图13~图15,本申请一实施例中,在电机支架100与壳体200之间设有减震装置800,电机支架100与壳体200通过减震装置800进行连接固定。
请具体参阅图16,减震装置800包括减震垫801,减震装置800连接固定电机组件与壳体200,减震垫801设置在电机组件与壳体200之间用于提供缓冲。动力头的主要振动来源为电机组件,壳体200用于固定、保护控制板等控制组件211、电池包226等,减震垫801设置在电机组件与壳体200之间,可以有效的过滤电机组件造成的振动,减低壳体200内控制组件211、电池包226受到的冲击。
请参阅图15~图16、图29,图15为本申请图3中A-A截面的剖视图,图16为图15中B区域放大图,图15~图16示出了一种示例性的减震装置800连接电机组件与壳体200的结构,图29为一示例性的减震装置800示意图,于本申请一实施例中,每个减震装置800还包括两个螺纹杆802,两个螺纹杆802分别固定在减震垫801的上下两侧。电机支架100上设有第一螺纹孔240,壳体200上设有第一通孔250,第一螺纹孔240与第一通孔250的位置、数量相对应,其中一侧的螺纹杆802拧入到第一螺纹孔240第一螺纹孔240内,另一 侧的螺纹杆802贯穿第一通孔250后与第一螺母803螺栓连接,从而实现电机支架100与壳体200之间的连接,减震垫801提高缓冲,过滤振动。
请继续参阅图16,于本申请一实施例中,电机支架100的侧壁设有安装块150,安装块150与电机支架100一体成型,保证支撑的稳定性。安装块150顶部设有容垫腔804,容垫腔804的底部设有第一螺纹孔240,安装时,减震装置800上的一个螺纹杆802拧入到第一螺纹孔240内,减震垫801设置于容垫腔804内,壳体200的底部设有包围部805,包围部805扣设于容垫腔804的顶面为容垫腔804进行密封,包围部805内设有压紧部806,压紧部806的中间设有第一通孔250,压紧部806对减震垫801进行压紧,保证装配牢固,另一个螺纹杆802贯穿第一通孔250后与第一螺母803螺纹连接。通过包围部805与容垫腔804的配合,对减震垫801进行密封保护,防水防尘,避免液体或灰尘对减震垫801造成破坏,延缓减震垫801的老化速度,延长使用时间。需要说明的是,针对不同的使用环境,减震装置800的安装可以做适应性变形,如容垫腔804设置在壳体200上,只要形成保护减震垫801的容纳腔,对容纳腔进行防水或防尘式保护。
为了更好的对控制组件211进行保护,一实施例中壳体200主体为塑料壳体200,塑料壳体200具有一定的弹性,当振动或者工具摔落时,除了减震装置800,塑料壳体200也可以提供缓冲,从而保证即使工具跌落导致较大冲击时,仍然可以保护控制组件211、电池包226等保持完好。
为了保证装配的稳定,对控制组件211与电池包226均提供缓冲、减震保护,在第一容纳腔210底部、第二容纳腔221底部均装配减震装置800,提高缓冲效果。电池包226的重量远远超过控制组件211的重量,第二容纳腔221底部的减震装置800多于第一容纳腔210底部的减震装置800,在保证缓冲保护的前提下,节约装配成本和装配时间。于一实施例中,第一容纳腔210的底部设置两个减震装置800,第二容纳腔221的底部设置四个减震装置800。为控 制组件211、电池包226等零件提供缓冲保护,减少振动,防止被振动损坏,延长使用寿命。
示例性的,动力头还包括功能接口1050,当外部拓展电池包通过功能接口1050连接动力头时,拓展电池包能够与电池包226共同为电机组件提供电能,通过拓展电池包与电池包226共同为电机组件提供电能,可以有效提高动力头的续航能力;当外部充电器通过功能接口1050连接动力头时,外部充电器能够为电池包226充电。通过外部充电器对电池包226进行充电,电池包226无需取出充电,方便对电池包226进行充电,操作方便简单,提高动力头的续航能力。本申请中,拓展电池包的形状、电量容量不做限制,如对于手持式的动力工具,如手持式割草机,拓展电池包可以由使用人员背负在背上,以使得拓展电池包使用时,工作人员可以正常操作动力工具;对于行进式动力工具,如手扶式、驾驶式割草机,拓展电池包可以外挂于动力工具上,以减轻工作人员的负重,降低工作人员的劳动强度,在实际的应用中,根据实际的场景进行拓展电池包的选择。一实施例中,拓展电池包的形状可以为固定规格,在使用时,拓展电池包放置在不同的容纳装置内,如背包、外挂包等,根据不同的使用需要选择不同的容纳装置即可。
一实施例中,当拓展电池包通过功能接口1050连接动力头时,控制模块211读取拓展电池包信息与电池包226信息,以控制拓展电池包与电池包226的工作状态。作为优选,控制模块211通过USART串口与拓展电池包进行通信,以确认功能接口1050插入的为拓展电池包,并实时读取拓展电池包的信息,包括但不限于电池电压、温度、放电电流信息。
一实施例中,动力头电池包226不少于两个,以电池包226两个为例,当第一电池包226和/或第二电池包226工作的同时,外接拓展电池包后,控制模块211读取通过USART串口与拓展电池包进行通信后,根据读取的拓展电池包信息,在电压相近时,拓展电池包切入主回路并与电池包226并联放电,以 获得更大的输出功率或者续航时间,接入拓展电池包的控制模块211可通过串口通信告知后级驱动板可用电流,以便后级驱动板可以根据接入拓展电池包的放电能力调整输出功率,这样可以让用户更高效更便捷的完成工作,省去了因电量不足反复充电导致工作不连续的不便,极大的提高了用户体验。在一实施例中,当控制模块211读取拓展电池包信息后,获得拓展电池包与电池包226的电压差,电压差不大于第一阈值时,拓展电池包与电池包226共同放电,作为优选,第一阈值为3~5V中的任一数值,如3V,4V、5V等,在本申请一实施例中,所述第一阈值为3V;当拓展电池包与电池包226的电压差大于第一阈值时,拓展电池包与电池包226中电压较高者先放电,直至电压差不大于第二阈值时,待放电的电池包共同放电,作为优选,第二阈值为1~2V中的任一数值,如1V、2V等,在本申请的一实施例中,所述第二阈值为1V。当拓展电池包与电池包226的总数大于2时,通过两两比对电池包之间的电压差,当最大的电压差不大于第一阈值时,所有的电池包共同放电,当最大的电压差大于第一阈值时,电压最高的电池包与电压差不大于第一阈值的电池包共同放电,直至电压最高的电池包与待放电电池包的电压差不大于第二阈值时,待放电的电池包共同放电,依次类推实现所有电池包的共同放电。
一实施例中,拓展电池包通过功能接口1050接入到动力头时,若动力头内未安装电池包226,或者电池包226处于充电或其他不可以用状态时,控制模块211通过USART串口实时与拓展电池包通信,确认插入的为拓展电池包,控制模块211实时检测拓展电池包信息,包括电池电压、温度、放电电流等信息,拓展电池包,拓展电池包独立放电。控制模块211将拓展电池包信息通过通信告知后级驱动板,后级驱动板根据拓展电池包信息调整输出功率,从而避免拓展电池包过放、过温等极限放电导致的异常或损坏,提高了拓展电池包的使用寿命。通过拓展电池包独立放电,在电池包226电量不足或其他不可使用状态时,可以保证动力头处于可以工作状态,保证工作的连续性。
一实施例中,电池组件包括有充电开关,当控制模块211检测到充电开关开启,并判断电池包226需要充电时,通过功能接口1050接入的外部充电器,对电池包226进行充电。
请参阅图41,一实施例中,外部充电器通过功能接口1050接入到动力头时,控制模块211通过激活上电,若检测到充电开关开启,通过通信确定电池包226需要充电时,控制模块211切换到充电模式。控制模块211检测电池包226的插入数目,若只插入一个电池包226,则对插入的电池包226进行充电;若插入有两个正常的电池包226,则首先判断两个电池包226的电压差,若两个电池包226的电压差不大于第三阈值,则对两个电池包226进行同时充电,第三阈值为3~5V中任意数值,如3V、4V、5V等,在本申请的一个实施例中,第三阈值与第一阈值相同,为3V。若两个电池包226的电压差大于第三阈值时,则对两者中较低电压的电池包226先进行充电,直至已充电电池包226与待充电电池包226件的电压差不大于第四阈值时,待充电电池包226接入,两个电池包226共同充电,作为优选,第四阈值为1~2V之间任意数值,如1V、2V等,在本申请的一个实施例中,第四阈值与第二阈值相同,为1V。当两个电池包226充满时,控制模块211关闭充电通道。一实施例中,动力头上设置有提示灯,电池包226充满电时,提示灯绿灯提示,以便于工作人员更好的发现充电完成,及时将外部充电器取下。
请参阅图41,一实施例中,电池组件包括有切换开关,控制模块211通过切换开关可以将电池包226切换到充电模式、放电模式,以满足电池包226的充放电需要。
一实施例中,外部充电器可以为AC/DC充电器,当AC/DC充电器插入功能接口1050时,控制模块211检测到充电开关开启,且电池包226需要充电时,通过CAN或串口通信确认进入充电状态,控制模块211控制切换开关至充电通道,电池包226进行充电模式。
一实施例中,外部充电器为太阳能逆变充电器,通过太阳能逆变充电器对电池包226充电原理如上所述,不再赘述。通过太阳能逆变充电器对电池包226进行充电,可以有效的提高动力头的野外工作适应能力,对于部分偏远地区或野外,普通家用或工业用电无法直达,通过太阳能逆变充电器对电池包226进行充电,有利于提高动力头的野外适用能力,满足不同环境的使用要求。通过太阳能逆变器充电器对电池包226进行充电,还可以节能环保,进一步的提高环保效果。
一实施例中,外部充电器为DC/DC充电器,功能接口1050外接DC/DC充电器时,对若干电池包226进行分别或同时充电,充电原理如上所述,不再赘述。
在一实施例中,所述功能接口1050具有多个,拓展电池包与外部充电器可同时连接到动力头,外部充电器包括AC/DC充电器、太阳能逆变充电器和DC/DC充电器中的一个。此时,外部充电器不但可以给电池包充电,还能够给拓展电池包充电。
请继续参阅图41,随着电子设备的日益应用,通过手机、平板、电脑、遥控器等获取动力头信息、控制动力头的应用更加广泛,手机、平板、电脑等电子设备续航有限,在使用中出现电量耗尽的情况屡屡出现。为了便于工作人员使用电子设备,避免电子设备电量耗尽无法使用的情况出现。本申请一实施例中,电池组件包括USB和/或type-C输出接口,USB输出接口可以外接USB线,满足多种使用需要。一实施例中,type-C输出接口支持PD通信协议,可以为手机、平板、电脑等进行充电。通过自动识别手机或电脑电压标准,对电池包226的电压进行DC-DC降压以达到手机或电脑等电子设备的供电标准,用户在户外无交流插座可用的情况下,可以对手机或电脑等电子设备进行充电,满足工作人员的使用需要。
现有的产品用户无法智能读取动力头或工具的各种信息,也无法通过联网 升级程序。本申请一实施例中,动力头包括蓝牙模块,用户可以通过手机APP与蓝牙模块连接,从而查看动力头的各种信息,如电池包226电量、累计运行时间、剩余工作时间、历史故障等信息,上述信息可以通过手机APP上传至云端,以便于厂商对动力头进行分析改进,提升用户体验。手机APP可以通过网络获得升级数据包,再通过手机APP与蓝牙模块的连接对动力头的软件版本进行更新,以修复可能存在的BUG或隐患,也可以获得最新的操作方式、开启更多的功能等,有效提高用户体验。
本申请还提供一种动力系统,动力系统包括动力头和外接设备。其中动力头包括:整机壳1、电机组件、电池组件,其中整机壳1包括电机支架100和壳体200,电机组装配于电机支架100内,电机组件驱动工作部工作,电池组件装配于壳体200内。电池组件包括电池包226、控制模块211和功能接口1050。
外接设备包含拓展电池包和/或外部充电器,外部充电器包括AC/DC充电器、太阳能逆变器和DC/DC充电器中的至少一种;其中,当功能接口连接外部充电器时,外部充电器能够对电池包充电,可以便于对动力头进行充电,提高动力头的续航能力;当功能接口1050连接外部拓展电池包时,拓展电池包能够与电池包共同为电机组件提供电能,提高动力头的输出功率,提高动力头的续航能力。。需要说明的是,上述动力系统未详细描述的部分及相对连接关系,可以参照现有相应的动力系统,本申请不再赘述。
功能接口1050可以外接同平台拓展电池包、同平台外部充电器,外部充电器包括太阳能逆变充电器、AC/DC充电器、DC/DC充电器等,便于不同方式对电池包226进行充电,提高续航能力。拓展电池包通过功能接口1050可以实现与电池包226共同放电、单独放电等,提高输出功率,延长续航时间。
所以,本申请有效克服了现有技术中的一些实际问题从而有很高的利用价值和使用意义。上述实施例仅例示性说明本申请的原理及其功效,而非用于限制本申请。任何熟悉此技术的人士皆可在不违背本申请的精神及范畴下,对上 述实施例进行修饰或改变。因此,举凡所属技术领域中具有通常知识者在未脱离本申请所揭示的精神与技术思想下所完成的一切等效修饰或改变,仍应由本申请的权利要求所涵盖。

Claims (22)

  1. 一种动力头,其特征在于,包括:
    电机支架,所述电机支架内设有电机装配腔,所述电机支架底部设置有整机安装面;
    壳体,所述壳体固定于所述电机支架的上方,所述壳体与所述电机支架间形成间隙;
    电机,所述电机包含电机定子、电机转子和输出轴;
    所述电机定子固定装配在所述电机装配腔内;
    所述电机转子装配在所述电机装配腔内与所述电机定子相转动;
    所述输出轴与所述电机转子相固定,所述输出轴与所述整机安装面基本平行;
    电池包,所述电池包安装于所述壳体内为所述动力头提供能量。
  2. 根据权利要求1所述的动力头,其特征在于,所述电机支架一体成型,所述电机支架包括设置有所述电机装配腔的电机装配部、设置于所述电机装配部下方的整机安装部、设置于所述电机装配部侧面的电池支撑部;所述电池包设置于所述电池支撑部的上方。
  3. 根据权利要求2所述的动力头,其特征在于,所述电机装配部上设有安装块,所述安装块与所述壳体的底面相固定,所述间隙设置于所述壳体与所述电机装配部的外壁之间;所述壳体内设有供控制模块安装的第一容纳腔,所述第一容纳腔设置于所述电机装配腔的上方;所述第一容纳腔与所述电机装配腔通过设置于壳体的第二内通口、设置于电机支架的第一内通口相连接,所述壳体与所述电机装配腔壁通过安装块、内通口接触。
  4. 根据权利要求2所述的动力头,其特征在于,所述电机支架还包括有加强支撑部,所述加强支撑部的一端设置于所述整机安装部,另一端设置于所述电池支撑部的底面。
  5. 根据权利要求1所述的动力头,其特征在于,所述动力头的重心位于所述动力头垂直于输出轴中心面的左右偏置面之间,左右所述偏置面与所述中心面 的距离不大于所述动力头宽度的百分之十五。
  6. 根据权利要求1所述的动力头,其特征在于,所述动力头重心纵向方向位于所述电机装配腔与所述壳体之间。
  7. 根据权利要求1所述的动力头,其特征在于,所述动力头重心位于所述电机装配腔外壁与所述电池包之间。
  8. 根据权利要求1所述的动力头,其特征在于,所述电机的最大输出功率范围为3kW~5kW;所述电池包能够装配于手持式电动工具,为所述手持式电动工具供能;所述电池包包含至少一组电芯,所述电芯为串联连接,所述电芯的最大输出功率≤2kW;所述电池包的电压为80~82V;所述动力头和被动力头驱动的电动工具之间设置有控制线,根据所述电动工具的状态,控制所述动力头的启停。
  9. 根据权利要求1所述的动力头,其特征在于:
    所述电机装配腔通过第一外通口与外界空气连通;
    所述壳体内设有装配控制模块的第一容纳腔,所述第一容纳腔上设有第二外通口;
    散热风路,所述散热风路依次连通所述第一外通口、所述电机装配腔、所述第一容纳腔、所述第二外通口。
  10. 根据权利要求9所述的动力头,其特征在于,所述散热风路内设有第一风扇,所述第一风扇设置于所述电机转子的输出轴上。
  11. 根据权利要求10所述的动力头,其特征在于,所述第一风扇设置于所述输出轴的尾端、所述第一外通口的顶部,外界空气经由所述第二外通口进入所述第一容纳腔,流经所述电机装配腔装配的线圈绕组后,由第一风扇驱动经所述第一外通口排出;所述散热风路中设有第二风扇,所述第二风扇设置于所述第一容纳腔的侧壁,所述第二风扇的出风方向与所述第二外通口的通风方向垂直。
  12. 根据权利要求10所述的动力头,其特征在于,所述第一风扇设置于所述 输出轴的前端,所述第一容纳腔与所述电机装配腔分设于所述散热风路中所述第一风扇的两侧。
  13. 根据权利要求9所述的动力头,其特征在于,所述散热风路包括有第一内通口、第二内通口;
    所述第一内通口设置于所述电机装配腔远离所述第一外通口一侧的顶部;
    所述第二内通口与所述第一内通口连通,所述第二内通口设置于所述第一容纳腔远离第二外通口一侧的底部。
  14. 根据权利要求13所述的动力头,其特征在于,所述第一外通口向下贯穿所述电机支架,所述电机支架的底面侧壁设有通风开槽,所述第一外通口通过所述通风开槽与外界空气连通;所述第二外通口设置于所述壳体的底面。
  15. 根据权利要求1所述的动力头,其特征在于,还包括:
    减震装置,所述减震装置包括减震垫;
    其中,所述壳体与所述电机支架通过所述减震装置相连接,所述减震垫设置于所述壳体与所述电机支架之间。
  16. 根据权利要求15所述的动力头,其特征在于,所述减震装置包括两个螺纹杆,两个所述螺纹杆分别设置在所述减震垫的两侧,并分别与两侧对应的所述壳体和所述电机支架相连接;所述电机支架上设有第一螺纹孔,所述壳体上设有第一通孔,所述减震垫一侧的所述螺纹杆与所述第一螺纹孔配合,所述减震垫另一侧的所述螺纹杆贯穿第一通孔后螺纹连接第一螺母。
  17. 根据权利要求1所述的动力头,其特征在于,还包括:
    功能接口,当所述功能接口连接外部充电器时,所述外部充电器能够对所述电池包充电;
    当所述功能接口连接外部拓展电池包时,所述拓展电池包能够与所述电池包共同为电机提供电能。
  18. 根据权利要求17所述的动力头,其特征在于,还包括控制模块,当所述功能接口连接外部拓展电池包时,所述控制模块读取所述拓展电池包信息与 所述电池包信息,以控制所述拓展电池包与所述电池包的工作状态,所述工作状态包括:所述拓展电池包与所述电池包共同放电、所述拓展电池包独立放电;所述拓展电池包与所述电池包的信息包括电池电压、温度、放电电流。
  19. 根据权利要求18所述的动力头,其特征在于,初始工作时,所述拓展电池包与所述电池包电压差不大于第一阈值时,所述拓展电池包与所述电池包共同放电;所述拓展电池包与所述电池包电压差大于第一阈值时,所述拓展电池包与所述电池包中电压较高者先放电,直至电压差不大于第二阈值时,待放电电池包共同放电。
  20. 根据权利要求19所述的动力头,其特征在于,所述电池包未安装或处于不可用状态时,所述拓展电池包独立放电,所述控制模块通信告知后级驱动板所述拓展电池包的信息,所述后级驱动板根据所述拓展电池包的信息调整输出功率。
  21. 根据权利要求19所述的动力头,其特征在于,所述控制模块检测所述电池包插入数目,若只插入一个所述电池包,则对插入的所述电池包进行充电;
    若插入两个所述电池包,判断两个所述电池包电压差,若两个所述电池包电压差处于第三阈值范围内时,所述拓展电池包对两个所述电池包同时充电;
    若两个所述电池包压差超出第二阈值范围时,对其中低电压的所述电池包进行充电,直至两个所述电池包电压差处于第四阈值范围内时,对两个所述电池包进行同时充电。
  22. 一种动力系统,其特征在于,包括动力头和外接设备,所述动力头包括:
    电机支架,所述电机支架内设有电机装配腔,所述电机支架底部设置有整机安装面;
    壳体,所述壳体固定于所述电机支架的上方,所述壳体与所述电机支架间形成间隙;
    电机,所述电机包含电机定子、电机转子和输出轴;
    所述电机定子固定装配在所述电机装配腔内;
    所述电机转子装配在所述电机装配腔内与所述电机定子相转动;
    所述输出轴与所述电机转子相固定,所述输出轴与所述整机安装面基本平行;
    电池包,所述电池包安装于所述壳体内为所述动力头提供能量;
    所述外接设备包含拓展电池包和/或外部充电器,所述外部充电器包括AC/DC充电器、太阳能逆变器和DC/DC充电器中的至少一种;
    其中,当所述功能接口连接外部充电器时,所述外部充电器能够对所述电池包充电;
    当所述功能接口连接外部拓展电池包时,所述拓展电池包能够与所述电池包共同为所述电机组件提供电能。
PCT/CN2023/118434 2022-09-16 2023-09-13 一种动力头及动力系统 WO2024055971A1 (zh)

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