CN117767631A - Transverse power head - Google Patents

Abstract

The application provides a horizontal unit head, concretely relates to horizontal unit head field. The motor assembly device comprises a motor bracket, wherein a motor assembly cavity is arranged in the motor bracket; the shell is fixed above the motor bracket, and a gap is formed between the shell and the motor bracket; the motor comprises a motor stator and a motor rotor, the motor stator is fixedly assembled in the motor assembly cavity, and the motor rotor is assembled in the motor assembly cavity to rotate with the motor stator; and the battery pack is arranged in the shell and used for providing energy for the power head. The power head solves the technical problems of unreasonable structure, concentrated heat, difficult heat dissipation, complex assembly and the like of the existing power head.

Description

Transverse power head

Technical Field

The application relates to the field of transverse power heads, in particular to a transverse power head.

Background

The existing power tools, especially power devices of garden tools, are divided into two major types, namely an engine taking fuel such as gasoline or diesel oil as an energy source and a motor taking a battery as an energy source, wherein the fuel engine has the problems of inconvenient operation, large vibration, large noise and serious pollution and potential safety hazards in gasoline and diesel oil storage, so that the existing power head is gradually replaced by a power head of a lithium battery driven motor.

The lithium battery driven motor has the advantages of small pollution, low noise and convenient operation, and along with the importance of environmental protection, the environment-friendly, environment-friendly and carbon-reduction life and working modes are advocated. In order to meet the use requirement of a higher-power tool, the existing lithium battery driving motor is assembled on a power head, and the outer rotor motor is assembled in a protected cavity, so that the problems of heat concentration, difficult heat dissipation, complex assembly and the like are caused. Based on the above problems, a lithium battery-driven power head with reasonable structure, convenient assembly and good heat dissipation effect is needed.

Disclosure of Invention

In view of the shortcomings of the prior art, the application provides a transverse power head so as to solve the technical problems of unreasonable structure, heat concentration, difficult heat dissipation, complex assembly and the like of the conventional power head.

To achieve the above and other related objects, the present application provides a transverse power head. Comprising the following steps: the motor bracket is internally provided with a motor assembly cavity; the shell is fixed above the motor bracket, and a gap is formed between the shell and the motor bracket; the motor comprises a motor stator and a motor rotor, the motor stator is fixedly assembled in a motor assembly cavity, and the motor rotor is assembled in the motor assembly cavity to rotate with the motor stator; the battery pack is arranged in the shell and provides energy for the power head.

In an embodiment of the application, the motor bracket is integrally formed and comprises a motor assembly part provided with a motor assembly cavity, a complete machine installation part arranged below the motor assembly part and a battery support part arranged on the side surface of the motor assembly part; the battery pack is arranged above the battery supporting part.

In an embodiment of the present application, the motor assembly portion is provided with a mounting portion, the mounting portion is fixed to the bottom surface of the housing, and the gap is disposed between the housing and the outer wall of the motor assembly portion.

In an embodiment of the present application, a first accommodating cavity for installing the control component is provided in the housing, and the first accommodating cavity is disposed above the motor assembly cavity.

In an embodiment of the present application, the first accommodating cavity is connected with the motor assembly cavity through a second inner through hole formed in the housing and a first inner through hole formed in the motor support, and the housing is not contacted with the motor assembly cavity except the mounting portion and the inner through hole.

In an embodiment of the present application, the motor support further includes a reinforcing support portion, one end of the reinforcing support portion is disposed on the mounting portion of the whole machine, and the other end of the reinforcing support portion is disposed on the bottom surface of the battery support portion.

In an embodiment of the present application, the center of gravity of the power head is located between a left offset surface and a right offset surface of the power head perpendicular to the center surface of the rotor shaft, and a distance between the left offset surface and the center surface is not greater than fifteen percent of the width of the transverse power head.

In an embodiment of the present application, a longitudinal direction of a center of gravity of the power head is located between the motor assembly cavity and the housing.

In an embodiment of the present application, a center of gravity of the power head is located between an outer wall of the motor assembly cavity and the battery pack.

In an embodiment of the present application, the top of the housing is provided with a flip cover, the flip cover is rotationally connected with the housing body, and a lock catch for limiting the rotation of the flip cover is arranged between the flip cover and the housing body.

In one embodiment of the present application, the maximum output power of the motor ranges from 3kW to 5kW.

In one embodiment of the present application, the battery pack can be assembled to a hand-held power tool to power the hand-held power tool.

In an embodiment of the present application, the battery pack includes at least one set of battery cells, the battery cells are connected in series, and the maximum output power of the battery cells is less than or equal to 2kW.

In one embodiment of the present application, the voltage of the battery pack is 80-82V.

In an embodiment of the present application, a control line is provided between the transverse power head and the electric tool driven by the power head, and the start and stop of the transverse power head are controlled according to the state of the electric tool.

The beneficial effects of this application lie in combining prior art.

The existing external rotor motor driven by the lithium battery is assembled in a protection cavity of the power head, so that heat is concentrated, heat dissipation is difficult, and assembly is complex. The power head arrangement mode of the motor rotor and the motor stator are directly assembled in the motor assembly cavity, and the motor rotor and the motor stator are both the motor shell and the whole power head shell, so that the heat dissipation capacity of the motor is effectively improved, and the problem that the existing heat is concentrated in the protection cavity is solved. The power head has the advantages of compact and reasonable structure, convenient assembly and convenient installation, can directly replace the existing gasoline engine, and solves the problems of large vibration, large noise, serious pollution and the like of the existing engine.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic perspective view of an exemplary cross-head unit of the present application;

FIG. 2 is a schematic diagram of an exemplary cross-head unit according to the present disclosure;

FIG. 3 is a front view of an exemplary cross-head unit of the present application;

FIG. 4 is a rear view of an exemplary cross-head power head of the present application;

FIG. 5 is a top view of an exemplary cross-head power head of the present application;

FIG. 6 is a left side view of an exemplary cross-head unit of the present application;

FIG. 7 is a schematic view of a portion of an exemplary cross-head unit according to the present disclosure;

FIG. 8 is a perspective view of a portion of an exemplary cross-head configuration of the present application;

FIG. 9 is another angular schematic view of an exemplary cross-head portion configuration of the present application;

FIG. 10 is a schematic view of an exemplary motor mount according to the present application;

FIG. 11 is a top view of an exemplary motor mount according to the present application;

FIG. 12 is a perspective view of an exemplary motor mount according to the present application;

FIG. 13 is a schematic view of an exemplary shell body of the present application;

FIG. 14 is a schematic view of an exemplary shell body portion configuration of the present application;

FIG. 15 is a cross-sectional view of section A-A of FIG. 3 of the present application;

fig. 16 is an enlarged view of region B in fig. 15 of the present application.

Description of element reference numerals

100. A motor bracket; 110. a motor assembly cavity; 111. a first outer port; 112. a first inner port; 113. ventilating and slotting; 114. a front end cover; 115. a rear closure cap; 116. a rear end plate; 117. a vent hole; 118. a motor assembly part; 120. a complete machine installation part; 121. a whole machine mounting surface; 123. reinforcing ribs; 124. a second through hole; 130. a battery support part; 140. reinforcing the support portion; 150. a mounting block; 200. a housing; 210. a first accommodation chamber; 211. a control assembly; 212. a second outer port; 213. a second inner port; 214. a second fan; 221. a second accommodation chamber; 222. a case main body; 223. a flip cover; 224. locking; 225. a battery locking member; 226. a battery pack; 230. a top cover; 240. a first threaded hole; 250. a first through hole; 300. a motor rotor; 310. a rotor shaft; 400. a motor stator; 600. a first fan; 700. a filtering device; 800. a damping device; 801. a shock pad; 802. a threaded rod; 803. a first nut; 804. a cushion containing cavity; 900. a gap.

Detailed Description

Other advantages and effects of the present application will become apparent to those skilled in the art from the present disclosure, when the following description of the embodiments is given by way of specific examples. The present application may be embodied or carried out in other specific embodiments, and the details of the present application may be modified or changed from various points of view and applications without departing from the spirit of the present application. It should be noted that the following embodiments and features in the embodiments may be combined with each other without conflict. It is also to be understood that the terminology used in the examples of the present application is for the purpose of describing particular embodiments only, and is not intended to limit the scope of the present application.

It should be understood that the terms such as "upper," "lower," "left," "right," "middle," and "a" and the like recited in the present specification are merely descriptive of convenience and are not intended to limit the scope of the disclosure in which the disclosure may be practiced, but rather are intended to cover any variations or modifications in the relative terms that would otherwise be within the spirit of the disclosure.

Referring to fig. 1 to 6, fig. 1 to 6 show an exemplary transverse power head structure, in order to solve the problems of large vibration, large noise and large pollution of the existing fuel engine tool, the mounting structure of the transverse power head and the mounting structure of the complete machine tool of the present application are compatible with the mounting structure of the fuel engine, so that the replacement of the transverse power head and the fuel engine can be realized, the complete machine tool does not need to be replaced, and the transverse power head of the present application can meet the requirements of tool power, rotation speed, rotation direction and the like.

The transverse power head comprises a motor bracket 100 and a shell 200, a motor assembly cavity 110 is arranged in the motor bracket 100, a motor rotor 300 and a motor stator 400 are assembled in the motor assembly cavity 110, a rotor shaft 310 partially extends out of the motor assembly cavity 110, a battery pack 226 is arranged in the shell 200, and the battery pack 226 provides energy for the power head.

The motor bracket 100 is an integrally formed aluminum alloy shell, and the motor bracket 100 is used as a bracket of a power head and also used as a shell of a motor, is an integrated bracket and can integrate connection between a complete machine and a part. The motor bracket 100 is made of aluminum alloy, so that the heat dissipation of the motor is facilitated, the stability and firmness of support can be ensured, and the service life is prolonged; the motor bracket 100 is integrally formed, so that assembling steps such as bolts are reduced, the assembling efficiency is improved, the structural stability of the transverse power head is ensured, and the problem of assembling loosening caused by a long-term vibration environment is reduced.

Referring to fig. 10 to 12, fig. 10 to 12 show an exemplary motor bracket, and the motor bracket 100 includes a motor assembly portion 118, a complete machine mounting portion 120, and a battery support portion 130;

referring to fig. 7, fig. 7 illustrates an exemplary internal structure of a transverse power unit, a motor assembly cavity 110 is provided in a motor assembly portion 118, and a motor rotor 300, a motor stator 400, a rotor shaft 310 and other components are installed in the motor assembly cavity 110, in this exemplary embodiment, the motor is an external rotor motor, that is, the motor rotor 300 is located outside the motor stator 400 and rotates around the rotor shaft 310, so as to meet the requirement of higher power. The rated power of the motor is 2 kW-4 kW, and the maximum output power range of the motor is 3 kW-5 kW. In one embodiment, the motor has a rated power of 2.9kW and a maximum output power of 3.6kW. The motor speed is 2000-4000 rpm, and in one embodiment, the motor speed may be adjusted, including 2800rpm, 3200rpm, 3600rpm.

The front end bolt of the motor assembly cavity 110 is fixed with a front end cover 114, a central hole penetrating through the front end cover 114 is formed in the center of the front end cover 114, a bearing is assembled in the central hole, a rotor shaft 310 is in interference fit with the bearing, the rotor shaft 310 penetrates through the front end cover 114 and partially stretches out of the battery assembly cavity so as to be connected with a transmission mechanism, in one embodiment, the rotor shaft 310 has the same specification with an output shaft of a fuel engine and can be driven in a mode of being matched with a gear, a belt and the like, in one exemplary embodiment, the distance from the rotor shaft 310 to the bottom surface is 90-120 mm, and the diameter of the rotor shaft 310 is 18-22 mm so as to be convenient to directly replace with the existing fuel engine.

The front end cover 112 is provided with mounting holes, the number of the mounting holes is 4, four of the mounting holes are distributed around the rotor shaft 310 in a square arrangement mode, the front end cover 112 is mounted on the motor support 100 through the mounting holes, and mounting fastness is improved.

The motor assembly cavity is internally provided with a rear end plate 116, a central hole is also formed in the center of the rear end plate 116, a bearing is arranged in the central hole of the rear end plate 116 and is matched with the rotor shaft 310, and the rotor shaft 310 is supported through the two bearings. In an embodiment of the present application, a plurality of rear vent holes 117 are formed in the rear end plate 116, and the plurality of rear vent holes 117 are circumferentially arrayed around the axis of the rotor shaft 310, so that air in the motor assembly cavity 110 can circulate and dissipate heat, and damage to the motor caused by heat accumulation is avoided.

The rear sealing cover 115 is fixed at the tail part of the motor assembly cavity 110, a fan cavity is enclosed between the rear sealing cover 115 and the rear end plate 116, a first fan 600 is assembled in the fan cavity, the first fan 600 is fixed with the rotor shaft 310, and the rotor shaft 310 drives the first fan 600 to synchronously rotate when rotating, so that active heat dissipation is carried out for the motor assembly cavity 110, and the synchronous rotation ensures stable heat dissipation. In one embodiment, the end of the first fan 600 near the rear cover 115 is a circular plate, and the circular plate is matched with the blades of the first fan 600 to change the airflow direction, so that the airflow is discharged downwards through the first outer through hole 111 along a preset direction. The existing motor heat dissipation generally carries out heat dissipation for blowing in the motor, the first fan 600 of the application is close to the first outer through hole 111, the heat dissipation mode is to blowing outside the motor assembly cavity 110, the airflow driving the motor assembly cavity 110 flows, the airflow flowing speed is faster, and the heat dissipation is more efficient.

The two ends of the motor assembly cavity 110 are respectively provided with a first inner through hole 112 and a first outer through hole 111, and the first inner through hole 112 and the first outer through hole 111 are respectively arranged at the two ends of the motor assembly cavity 110, so that cold air is ensured to flow through the whole motor assembly cavity 110, and effective heat dissipation is performed.

In this embodiment, the first outer through hole 111 is disposed at the bottom of the motor assembly cavity 110, under the first fan 600, the first fan 600 discharges the air flow in the motor assembly cavity 110 through the first outer through hole 111, and compared with the air outlet directly disposed at the end parallel to the rotor shaft 310, the first outer through hole 111 disposed downward can reduce the rainwater, dust and the like entering into the motor assembly cavity 110 from the first outer through hole 111, which causes damage to the motor. The first outer through hole 111 downwards penetrates through the whole machine installation part 120, a ventilation slot 113 is formed in the bottom of the side wall of the whole machine installation part 120, the ventilation slot 113 is communicated with the first outer through hole 111, the air outlet of the first outer through hole 111 is smooth, and the heat dissipation effect is guaranteed. The ventilation slot 113 is arranged at the bottom of the side wall of the whole machine mounting part 120, so that the distance between the hot air outlet and the cool air inlet is effectively increased, and the heat dissipation capacity is further improved.

In one embodiment, the first internal port 112 is disposed at the top of the motor assembly cavity 110 to ensure that cool air flows through the entire motor assembly cavity 110. The motor support 100 integrated into one piece, if directly by machining center processing first interior opening 112, the processing degree of difficulty is great, the precision is difficult to guarantee, through dividing into two with first interior opening 112, one part sets up the tip in motor assembly chamber 110, another part sets up on front end housing 114, front end housing 114 assembles on motor assembly chamber 110 after, two parts constitute complete first interior opening 112, the opening of two parts is open processing, the processing degree of difficulty is lower.

The whole machine mounting part 120 is arranged at the bottom of the motor assembly part 118, and the power head is mounted on the whole machine of the tool through the whole machine mounting part 120. In this application embodiment, the bottom surface of complete machine installation department 120 is rectangular complete machine installation face 121, is equipped with a plurality of second through holes 124 on the complete machine installation face 121, and second through holes 124 can hold the bolt and pass through, installs complete machine installation department 120 on the instrument complete machine through second through holes 124 and bolt, installs simply, the operation is swift, and the present instrument complete machine is matchd to the second through holes 124 of this application, is convenient for only change the fuel engine under the prerequisite of not changing whole power tool. Preferably, the second through holes 124 are waist-shaped holes arranged on the mounting surface 121 of the whole machine, wherein two of the second through holes are waist-shaped holes, two of the second through holes are circular holes, the radius of each waist-shaped hole is 4-6 mm, the distance between the centers of two semi-circles is 14-16 mm, the radius of each circular hole is 4-6 mm, and the mounting size of the mounting surface of the whole machine is adjusted according to the existing fuel engine so as to be convenient to replace. The output shaft of the motor, i.e., the axis of rotor shaft 310, is parallel to the mounting surface 121 of the machine. In one embodiment, after the complete machine mounting surface 121 is mounted on the complete machine, the complete machine mounting surface 121 is parallel to the ground, and in another embodiment, after the complete machine mounting surface 121 is mounted on the complete machine, the complete machine mounting surface 121 is perpendicular to the ground, and at this time, the axis of the rotor shaft 310 is also perpendicular to the ground. The angle of the rotor shaft 310 is determined according to the position of the mounting surface 121 of the whole machine and the mounting position of the whole machine, and the axis of the rotor shaft 310 may be parallel or perpendicular to the ground.

A control line is arranged between the power head and the whole machine (for example, an air compressor, a cleaning machine or an electric tool driven by the power head, such as a snowplow, and the like), the control line is used for receiving the working state of the whole machine, for example, whether the air pressure of the air compressor reaches a threshold value, whether the water pressure of the cleaning machine reaches the threshold value, and the like, if the air pressure reaches the threshold value, a signal is sent to the power head, the power head automatically stops and is in a standby state, and after the pressure is reduced to a set value, the signal is sent to the power head, and the power head is restarted.

To the operation of partial instrument complete machine needs the user to hold, if weight is too big then can cause the user to lift difficulty, be unfavorable for the operation, in order to reduce unit head quality, save cost, complete machine installation department 120 is the fretwork design, fretwork part runs through complete machine installation face 121 downwards, fretwork part is equipped with strengthening rib 123, support complete machine installation department 120, in this application an embodiment, partial strengthening rib 123 is square range, end to end, in addition have partial strengthening rib 123 to connect square corner and complete machine installation department 120's lateral wall, the integrality of strengthening rib 123 has been guaranteed, the intensity of complete machine installation department 120 is improved. The hollowed-out treatment reduces the weight, saves the materials and saves the cost on the premise of ensuring the bearing strength.

The battery support portion 130 is disposed at a side of the motor mounting portion 118, and the battery support portion 130 is formed in a zigzag shape with the motor mounting portion 118. The battery support part 130 is mainly used for supporting the battery pack 226, the battery pack 226 is higher in height, the battery support part 130 is arranged on the side face of the motor assembly part 118, the overall appearance of the power head is approximately cuboid after the power head is assembled, the reasonable utilization of space is effectively realized, and the layout is reasonable and compact.

The battery support portion 130 is located the side of motor assembly portion 118 and leads to the bottom to be in unsettled state, in order to guarantee battery support portion 130's bearing capacity, avoid under the impact circumstances battery support portion 130 atress great and motor assembly portion 118 take place impaired, the separation scheduling problem appearance, in an embodiment, be equipped with on the complete machine installation portion 120 and strengthen support portion 140, strengthen support portion 140 and keep away from the one end of complete machine installation portion 120 and be connected with battery support portion 130's bottom surface, provide the support, improved battery support portion 130's bearing capacity, satisfy the loading needs of bigger weight battery.

In an embodiment, the bottom surface of the battery supporting portion 130 is provided with an enclosing barrier, the enclosing barrier is respectively arranged on three sides of the bottom surface of the battery supporting portion 130, which are not close to the motor assembling portion 118, and the enclosing barrier 131 is provided to further support the area where the battery pack 226 is located, so that the battery pack 226 is prevented from toppling under the situation of vibration or impact; the concave part which is matched with the enclosure is arranged on the shell 200, the concave part is concave in the shell 200, a step is formed at the contact position of the concave part and the enclosure top surface, and the shell 200 can be further supported by the plane contact of the step and the enclosure top surface, so that the shell 200 is prevented from shaking or tilting.

In order to further reduce the weight of the power head, in an embodiment, the bottom surface of the battery support portion 130 is provided with a plurality of weight reducing holes, so as to realize weight reduction design, and the weight of the battery support portion 130 is reduced under the premise of ensuring the strength of the battery support portion 130, and the weight reducing holes are also beneficial to heat dissipation of the bottom of the battery.

The transverse power head further comprises a housing 200, the housing 200 is fixed on the upper portion of the motor support 100, referring to fig. 4 to 5, a first accommodating cavity 210 and a second accommodating cavity 221 are arranged in the housing 200, a control component 211 such as a control board is assembled in the first accommodating cavity 210, the control component 211 is connected with a switch circuit assembled on the bottom shell, a battery pack 226 is detachably mounted in the second accommodating cavity 221, and the battery pack 226 is electrically connected with the control component 211 and the motor to provide energy for motor rotation.

Referring to fig. 3, 4 and 6, the housing 200 is fixedly connected to the motor support 100, and in an embodiment of the present application, a gap 900 is provided between the motor assembly portion 118 and the housing 200. The motor assembly portion 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 accommodating chamber 210 is connected to the motor mounting chamber 110 through a second inner opening 213 provided in the housing and a first inner opening 112 provided in the motor bracket 100, and the housing 200 is not in contact with the motor mounting portion 118 except for the mounting block 150 and the inner opening. The motor assembly part 118 and each assembly assembled in the motor assembly part 118 form an external motor, so that each assembly assembled in the motor assembly cavity 110 can be effectively guaranteed to dissipate heat through the side wall of the motor assembly part 118, the heat dissipation capacity is improved, heat accumulation is avoided, and the service life of the power head is prolonged.

An operation panel is provided on the housing 200, and a power switch is provided on the operation panel to control the on-off of the power head. A speed selection switch is arranged on one side of the power switch, the speed selection switch is a film switch, low, medium and high rotating speeds are arranged, and an operator can switch among the low, medium and high gears by pressing the speed selection switch in sequence. The operation panel is also provided with a display device for displaying the battery pack electric quantity, and the residual electric quantity of the battery pack can be displayed in real time.

In an embodiment, the first accommodating cavity 210 is disposed above the motor assembly portion 118, the second accommodating cavity 221 is disposed at the top of the battery supporting portion 130, on the one hand, the height of the battery pack 226 is larger, and by disposing the first accommodating cavity 210 above the motor assembly portion 118, the overall layout of the power head is more reasonable. On the other hand, the motor rotor 300, the motor stator 400 and the like are assembled in the motor assembling part 118, the weight is large, the side weight of the battery pack 226 in the shell 200 is large, and the weight distribution of the power head is more uniform and the operation is more convenient by arranging the battery pack 226 and the motor assembling part 118 approximately horizontally.

Referring to fig. 5, in an embodiment, a center of gravity projection of the power head is located between left and right offset surfaces of a center surface of the power head, and a distance between the left and right offset surfaces and the center surface is not greater than fifteen percent of a width of the power head. When the power tool works, the gravity center projection of the power head is positioned between the left offset surface and the right offset surface, so that the operation of a user is facilitated. Preferably, the center of gravity projection of the power head is located on the center plane of the power head, and the center plane is perpendicular to the center plane of the power head of the rotor shaft 310.

In order to further improve the convenience of operation and the stability of the tool, the center of gravity is located longitudinally between the motor assembly chamber and the housing, preferably above the motor assembly portion and below the housing in which the first accommodation chamber is located. In the left-right direction, the gravity center of the power head is positioned between the motor assembly part and the battery pack, and the gravity centers of the power head are limited in three directions, so that the tool can be conveniently operated.

The shell 200 comprises a shell main body 222, a top cover 230 and a turnover cover 223, and in order to reduce the weight of the whole machine and the cost, the shell 200 is preferably made of plastic materials, so that the processing is convenient, the cost is low, and the buffer can be provided for parts assembled in the shell 200 during vibration or impact, so that the damage to the parts is avoided. Referring to fig. 13 to 14, in one embodiment, the shell body 222 is a zigzag shell, and is provided with two vertical open cavities; the top cover 230 is fixedly coupled to the case main body 222 by screws or bolts to form a first receiving chamber 210, and a control unit 211 such as a control board is assembled in the first receiving chamber 210.

For electronic components such as a control board, a large amount of heat can be generated in the working operation process, and if the heat cannot be timely dissipated, the electronic components are damaged due to overhigh temperature or the control operation is influenced. In order to improve the heat dissipation capability of the first accommodating cavity 210 where the control assembly 211 is located, in an embodiment, a second outer through hole 212 and a second inner through hole 213 are disposed at the bottom of the first accommodating cavity 210, the second outer through hole 212 and the second inner through hole 213 are separately disposed at two sides of the bottom of the first accommodating cavity 210, that is, the second outer through hole 212 and the second inner through hole 213 are disposed at two sides of the control assembly 211, and the airflow direction between the second outer through hole 212 and the second inner through hole 213 is parallel or substantially parallel to components such as a control board, so as to ensure that cold air entering from the second outer through hole 212 flows out of the first accommodating cavity 210 through the second inner through hole 213 after flowing through the control assembly 211, thereby improving the heat dissipation capability of the first accommodating cavity 210.

In order to improve the overall heat dissipation capability of the power head, the control unit 211, the motor and other components are subjected to overall coordinated heat dissipation. In this embodiment, the second inner opening 213 is communicated with the first inner opening 112, the first fan 600 blows air to the first outer opening 111, drives cold air to enter the first accommodating cavity 210 from the second outer opening 212, enters the motor assembly cavity 110 through the second inner opening 213 and the first inner opening 112, finally flows out through the first outer opening 111 and the ventilation slot 113, and drives air flow to dissipate heat through the outward blowing of the first fan 600.

The ventilation slot 113 is formed in the bottom surface of the motor bracket 100, and compared with the existing air outlet formed in the end portion of the motor, the distance between the ventilation slot 113 and the second outer through hole 212 is greatly increased, hot air is prevented from being re-inhaled into the second outer through hole 212, and the heat dissipation effect is guaranteed.

The control assembly 211, the battery pack 226 and the like can generate heat, the first accommodating cavity 210 and the second accommodating cavity 221 are larger in cavity, in order to improve the heat dissipation capacity of the first accommodating cavity 210 and the second accommodating cavity 221, in the embodiment of the application, the second fan 214 is arranged on the side wall of the first accommodating cavity 210, which is close to the second outer through hole 212, and the blowing direction of the second fan 214 is perpendicular to the second outer through hole 212 or obliquely inclined upwards, so that the flow speed of air flow can be accelerated through the second fan 214, and the movement direction of the air flow can be changed, so that the air flow can flow through a larger range, and full heat dissipation is ensured.

The power head is installed on the whole machine of the tool, the environment of the whole machine of the tool is generally severe, such as small scraps splashed, dust flies and the like caused by various cutting operations, and especially the second outer through hole 212 is internally provided with air, so that scraps, dust and the like are easily driven to enter the power head along with cold air. In an embodiment of the present application, the second outer port 212 is provided with the filtering device 700, and the filtering device 700 is used for filtering the chips, dust and the like in the cold air, so as to avoid the problems of damage or reduced heat dissipation effect of the power head caused by the entry of the chips, dust and the like into the power head.

In an embodiment, the second outer opening 212 is a recess of the housing 200 toward the first accommodating cavity 210 and forms a grille-like air inlet, and the recess is provided with a filter screen, which can effectively filter out chips, dust and the like in the cold air. The bottom surface of concave part can be dismantled and is fixed with the grid board, and grid board and concave part adopt quick detach structure, if the concave part is equipped with the bayonet socket, and the edge of grid board is equipped with the fixture block of V type mouth, fixture block and buckle matched with. Under the premise that the air inlet is not influenced, the grid plate can prevent larger scraps, stones and the like from damaging the filter screen, can limit the filter screen and prevent the filter screen from falling off, and the quick-dismantling structure can be used for conveniently replacing the filter screen and improving the maintenance efficiency.

Referring to fig. 13 to 14, a second accommodating cavity 221 is formed in the other vertical upward open cavity of the shell main body 222 by matching with a flip cover, a battery pack 226 is arranged in the second accommodating cavity 221, a terminal electrically connected with the battery pack 226 is arranged at the bottom of the second accommodating cavity 221, the terminal is connected with the control assembly 211 and the motor, and the battery pack 226 is quickly connected into a power head circuit through the terminal. The back of the second accommodating chamber 221 is a partition board, and the partition board divides the first accommodating chamber 210 and the second accommodating chamber 221 on one hand, and on the other hand, the partition board can be utilized to directly fix part of the control assembly 211, so that reasonable arrangement of the structure is realized.

In an embodiment, at least two battery packs 226 may be assembled in the housing 200, and the two battery packs 226 may be of the same type or different types, which is not limited in this application, and the battery packs 226 of corresponding types may be selected according to the usage requirement of the power head to provide power for the power tool. The two battery packs 500 are connected in parallel, and the power of the power head can be increased. In other embodiments, two battery packs 500 may be connected in series, providing the operating voltage of the power head. The two battery packs 500 can also be sequentially discharged outwards, and when one battery pack 500 is exhausted, the other battery pack 500 starts to discharge outwards, and the adjustment can be performed according to actual needs.

The two battery packs 226 are respectively arranged at two sides of the advancing direction of the power head or arranged at the front and back along the advancing direction, so that the gravity balance of the power head is ensured. A partition is provided between the two battery packs 226 to provide enough space to ensure heat dissipation between the battery packs 226, thereby avoiding heat accumulation. Further, the bottom of the battery compartment is provided with a spring, the side wall of the battery compartment is provided with a battery locking piece 225, when the battery pack 226 is inserted into the battery compartment, the spring is compressed, the battery locking piece 225 locks the battery pack 226 in the battery compartment, and when the battery locking piece 225 is unlocked, the battery pack 226 is automatically ejected, so that the battery pack 226 can be quickly taken and put.

In one embodiment, at least one cell group is disposed within the battery pack 226, with one cell group comprising a plurality of electrically connected cells. The cells are connected in series or in parallel to obtain the required voltage. The power head is used for replacing a common gasoline engine, and as described above, the output power of the power head is 2 kW-4 kW, in order to ensure the output of the power head, the voltage of the battery pack is 80-82V, the battery cells in the battery pack 226 are connected in series, the voltage of the battery cells is 3.6V, and the number of the battery cells in a string is 22-23. The battery pack 226 may have more than one string of cells therein, with the number of cells in each string being equal and the strings being connected in parallel. In one embodiment, the number of cell strings is 1-3. When two battery packs 226 are connected in parallel to the external discharge battery, the power head is powered by 2-6 battery cell strings, so that the discharge current of the battery cells is still in the safety threshold range even if the power head reaches the maximum output power. In order to ensure the safety of the operation of the battery pack 226 and the heat dissipation effect, the output power of each cell string is 2kW or less.

In an embodiment, the battery cell may be a lithium battery cell. The battery pack 226 can be detached from the power head by a user, and the detached battery pack 226 can be installed in other handheld electric tools to provide energy for the handheld electric tools, that is to say, the battery pack 226 in the application can be applied to the power head and other handheld tools, and the battery pack 226 in other handheld tools can also be applied to the power head of the application, so that the adaptability of the battery pack is improved, and the capability of the power head for adapting to the battery pack 226 is also improved. The hand-held electric tool may be a garden tool such as a grass trimmer, a pruning machine, a blower, or a torsion output tool such as an electric drill or an electric hammer, a saw tool such as an electric circular saw, a curved saw, or a reciprocating saw, or a grinding tool such as an angle grinder or a sander. In one embodiment, the battery pack 226 may also provide power to a hand propelled power tool, such as a hand propelled mower, hand propelled snowplow, or the like.

In one embodiment, the flip cover 223 is rotatably coupled to the case body 222 for opening and closing the second receiving chamber 221 to facilitate replacement of the battery pack 226. Further, a shaft fixing seat is arranged at the top of the partition board of the shell main body 222, a rotating shaft parallel to the partition board of the shell main body 222 is arranged on the shaft fixing seat, and the overturning cover 223 is rotatably connected with the battery compartment through the rotating shaft. The rotation angle of the flip cover 223 and the case main body 222 is limited by a limit clamping groove, and is adjusted according to the actual condition of the power head, which is not limited in the present application.

In one embodiment, to ensure that the battery pack 226 does not automatically open during use vibrations, the battery pack may be quickly opened again when it is needed to replace it. A lock catch 224 is provided between the flip cover 223 and the case main body 222.

The lock catch 224 includes a first rotating plate and a second rotating plate that rotate relatively, wherein the first rotating plate is rotatably connected to the front end of the housing main body 222, and the first rotating plate rotates around a rotating shaft on the housing main body 222. One end of the first rotating plate far away from the rotating shaft of the shell main body 222 is rotationally connected with the second rotating plate, one end of the second rotating plate close to the first rotating plate is provided with a clamping part, and the front end of the overturning cover 223 is provided with a clamping groove matched with the clamping part. When the lock catch 224 is in an open state, the first rotating plate and the second rotating plate are located below the shell main body 222 in a natural sagging state, and when the lock catch is needed to be buckled, the first rotating plate is rotated to be vertically upwards, then the second rotating plate is rotated until the clamping part is rotated and inserted into the arc-shaped clamping groove, so that the locking is realized, and the overturning cover 223 and the shell main body 222 are relatively fixed.

In the using process of the whole tool, the working condition is complex, and most of the working conditions are severe, so that large vibration can be generated. The main vibration sources of the power head include the vibration caused by the rotation of the motor and the vibration transmitted by the whole machine of the tool, and no matter which vibration is transmitted to the shell 200 by the motor bracket 100. The housing 200 is provided with the control unit 211 and the battery pack 226, which are easily damaged, and the vibration strength is too high to be easily damaged. Referring to fig. 13 to 15, in an embodiment of the present application, a damping device 800 is disposed between the motor bracket 100 and the housing 200, and the motor bracket 100 and the housing 200 are connected and fixed by the damping device 800.

Further, the shock absorbing device 800 includes a shock absorbing pad 801, the shock absorbing pad 801 is preferably made of rubber, threaded rods 802 are fixed at the upper and lower ends of the shock absorbing pad 801, and the two threaded rods 802 are respectively connected with the corresponding casings at two sides and the motor bracket 100. Preferably, the motor bracket 100 is provided with a plurality of first threaded holes 240, the casing 200 is provided with corresponding first through holes 250, one of the threaded rods 802 is screwed into the motor bracket 100 in a threaded fit with the first threaded holes 240, and the other threaded rod 802 is screwed with a first nut 803 after penetrating through the first through holes 250. The motor bracket 100 is a metal piece, preferably made of aluminum alloy, and can be directly provided with a threaded hole. The housing 200 is preferably made of plastic, and if a threaded hole is directly formed, the strength requirement for the threaded hole is high, and the assembly strength can be improved by matching the first threaded rod 802 with the first nut 803. When the vibration is transmitted from the motor bracket 100 into the housing 200, the vibration is first damped by the damper 801, so that the vibration applied to the housing 200 is reduced, and the control unit 211 and the battery pack 226 are prevented from being subjected to stronger vibration. When the shell 200 is made of plastic, if the power head falls or impacts greatly, the shell 200 can buffer the control component 211 and the battery pack 226 if the power head directly collides with the shell 200, so that the damage of the control component 211 or the battery pack 226 with high price is avoided; the cushion and housing 200 cooperate to provide cushioning to the control assembly 211 or the battery pack 226 and protection to the control assembly 211 and the battery pack 226 upon impact to the motor bracket 100 side.

In one embodiment, to ensure firm assembly, two mounting blocks are disposed on the side of the motor assembly portion 118 away from the battery support portion 130, a downward accommodating pad cavity 804 is disposed on the top surface of the mounting blocks, the accommodating pad cavity 804 can accommodate the shock pad 801, and a first threaded hole 240 is disposed at the bottom of the accommodating pad cavity 804; the bottom surface of the housing 200 is provided with a corresponding cover part, and the cover part can cover the top surface of the accommodating cavity, so that dust or rainwater and the like are prevented from entering the accommodating cushion cavity 804, and the aging of the shock pad 801 is delayed. A first through hole 250 is formed in the cover portion, one of two threaded rods 802 of the shock absorbing device 800 is matched with the first threaded hole 240, and the other threaded rod extends into the shell 200 through the first through hole 250 to be connected with a first nut 803 in a threaded mode. The bottom surface of the battery supporting part 130 is provided with four first screw holes 240, and the housing 200 is provided with four first through holes 250 at corresponding positions for mounting the four shock absorbing devices 800. To holding the setting of filling up the chamber 804, can set up on motor support 100, also can set up on casing 200, form waterproof, dirt-proof space, carry out waterproof, dirt-proof protection to the shock pad 801 of rubber material, delay the ageing of shock pad 801, do not limit to specific setting up mode this application.

The transverse power head can directly replace the existing fuel engine, and has the beneficial effects of environmental protection, reasonable layout, convenience in assembly, good heat dissipation and vibration filtration. Therefore, the application effectively overcomes some practical problems in the prior art, and has high utilization value and use significance. The foregoing embodiments are merely illustrative of the principles of the present application and their effectiveness, and are not intended to limit the application. Modifications and variations may be made to the above-described embodiments by those of ordinary skill in the art without departing from the spirit and scope of the present application. Accordingly, it is intended that all equivalent modifications and variations which may be accomplished by persons skilled in the art without departing from the spirit and technical spirit of the disclosure be covered by the claims of this application.

Claims (15)

1. A transverse power head, comprising:

the motor bracket is internally provided with a motor assembly cavity;

the shell is fixed above the motor bracket, and a gap is formed between the shell and the motor bracket;

a motor comprising a motor stator and a motor rotor,

the motor stator is fixedly assembled in the motor assembling cavity,

the motor rotor is assembled in the motor assembling cavity and rotates with the motor stator;

and the battery pack is arranged in the shell and used for providing energy for the power head.

2. The transverse power head as claimed in claim 1, wherein 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 arranged below the motor assembly part, and a battery support part arranged on a side surface of the motor assembly part; the battery pack is arranged above the battery support portion.

3. The transverse power head as claimed in claim 2, wherein the motor assembly portion is provided with a mounting block, the mounting block is fixed to the bottom surface of the housing, and the gap is disposed between the housing and the outer wall of the motor assembly portion.

4. The transverse power head as recited in claim 3, wherein a first receiving cavity for mounting the control assembly is provided in the housing, the first receiving cavity being disposed above the motor assembly cavity.

5. The transverse power head as recited in claim 4, wherein the first receiving cavity is connected to the motor assembly cavity through a second internal port provided in the housing and a first internal port provided in the motor bracket, the housing and the motor assembly cavity wall being non-contacting except for the mounting block and the internal port.

6. The transverse power head as recited in claim 2, wherein the motor bracket further comprises a reinforcing support portion, one end of the reinforcing support portion is disposed on the whole machine mounting portion, and the other end is disposed on a bottom surface of the battery support portion.

7. The transverse power head as recited in claim 1, wherein the power head center of gravity is located between left and right offset surfaces of the power head perpendicular to the rotor shaft center plane, the offset surfaces being no more than fifteen percent of the transverse power head width from the center plane.

8. The transverse power head as recited in claim 1, wherein the longitudinal direction of the center of gravity of the power head is located between the motor assembly cavity and the housing.

9. The transverse power head as recited in claim 1, wherein the power head center of gravity is located between the motor assembly chamber outer wall and the battery pack.

10. The transverse power head as claimed in claim 1, wherein a flip cover is provided on the top of the housing, the flip cover is rotatably connected to the housing main body, and a lock catch for restricting rotation of the flip cover is provided between the flip cover and the housing main body.

11. The transverse power head according to claim 1, wherein the maximum output power of the motor ranges from 3kW to 5kW.

12. The cross-head of claim 1, wherein the battery pack is capable of being fitted to a hand-held power tool to power the hand-held power tool.

13. The transverse power head as recited in claim 12, wherein the battery pack comprises at least one group of cells, the cells being connected in series, the maximum output power of the cells being less than or equal to 2kW.

14. The transverse power head as recited in claim 13, wherein the voltage of the battery pack is 80-82V.

15. The transverse power head according to claim 1, wherein a control line is provided between the transverse power head and an electric tool driven by the power head, and the start and stop of the transverse power head are controlled according to the state of the electric tool.