Backpack type air blower

Abstract

The utility model relates to a backpack type air blower which comprises an air blowing assembly arranged in a backpack frame, and the air blowing assembly comprises a driving motor and a fan which are arranged along the transverse axis. A plurality of battery packs adapted to provide power to the drive motor; the bearing frame comprises a supporting component close to the bearing side of a person, and the supporting component is provided with a bearing face facing the back of the human body. The battery packs are arranged side by side in the direction parallel to the transverse axis; and the central axes L1 of the plurality of battery packs in the vertical direction are parallel to one another and are closer to the back side than the central axis L2 of the blast assembly in the vertical direction. According to the technical scheme, the central axis of the battery pack is arranged to be closer to the back bearing surface, so that the gravity center of the whole back bearing frame is closer to the back of a human body, the stability and balance feeling during back bearing are improved, and fatigue and discomfort caused by gravity center shift are reduced. In addition, the gravity center of the battery pack closer to the back is beneficial to more uniformly distributing the weight on the back of the human body, so that the local pressure is reduced, and the carrying comfort is improved.

Description

Technical Field

[0001] This utility model relates to a blower, and more particularly to a backpack blower. Background Technology

[0002] Power tools are more environmentally friendly than engine-driven tools, leading to their widespread use. To facilitate portability, backpack blowers are now commonly used, allowing users to carry the equipment on their backs, thus reducing strain on their hands and alleviating fatigue.

[0003] However, backpack blowers generally require large-capacity battery packs and large electric motors due to their high power and long discharge time, which in turn increases the overall weight of the blower.

[0004] Therefore, the weight of a backpack blower is an issue, as a heavier blower can be cumbersome to use and put pressure on the user's shoulders. Summary of the Invention

[0005] The purpose of this invention is to provide a backpack-type blower that is comfortable to carry.

[0006] In view of this, the present application provides a backpack blower, comprising:

[0007] Back support frame;

[0008] A blower assembly, disposed within the backpack frame, the blower assembly including a drive motor and a fan arranged along a transverse axis;

[0009] Multiple battery packs are adapted to provide power to the drive motor to drive the motor to rotate the fan and generate airflow through the main air duct of the blower assembly;

[0010] The carrying frame includes a support member near the person's back, and the support member has a back side facing the back of the person.

[0011] Multiple battery packs are arranged side by side along a direction parallel to the transverse axis;

[0012] The vertical central axes L1 of the multiple battery packs are parallel to each other and are respectively closer to the back side than the vertical central axis L2 of the blower assembly.

[0013] Furthermore, the vertical central axes L1 of the multiple battery packs are located in the same plane.

[0014] Furthermore, the battery pack includes a first battery pack and a second battery pack;

[0015] The first battery pack has a first center of gravity line S1, and the second battery pack has a second center of gravity line S2;

[0016] The first center of gravity line S1 and the second center of gravity line S2 are located on both sides of the center of gravity line S3 of the drive motor.

[0017] Furthermore, the drive motor is located within the region between the first center of gravity line S1 and the second center of gravity line S2.

[0018] Furthermore, the center line of the region of the first center of gravity line S1 and the second center of gravity line S2 passes perpendicularly through the drive motor.

[0019] Furthermore, the battery pack is positioned above the blower assembly.

[0020] Furthermore, the support member includes an inwardly extending partition wall that divides the inner side of the support member into a blower assembly mounting section and a battery receiving section.

[0021] The blower assembly mounting part is adapted to install and connect the blower assembly;

[0022] The battery housing is adapted to accommodate and house the battery pack;

[0023] The battery housing is located above the blower assembly mounting section.

[0024] Furthermore, it also includes:

[0025] A battery mounting base, which is connected to the partition wall to combine with the battery receiving portion to form a battery mounting portion;

[0026] The battery mounting base includes a first plug-in portion and a second plug-in portion that are symmetrically distributed and protrude from the surface of the mounting base, and each plug-in portion is provided with an electrical connection terminal.

[0027] Furthermore, the battery pack installed and connected within the battery mounting section is connected to the first plug-in section and the second plug-in section to achieve the docking of electrical connection terminals, and is spaced apart from the partition wall.

[0028] Furthermore, the upper bottom surface of the battery mounting base protrudes from the partition wall relative to the bottom of the battery pack, has a height difference with the partition wall, and is provided with an elastic assisting member on the upper bottom surface suitable for abutting against the battery pack to assist in the disassembly and removal of the battery pack.

[0029] Furthermore, the elastic assist component includes:

[0030] An assisting arm is hinged to the battery mounting base via a pin and is adapted to rotate along the pin. The assisting arm includes a connecting end and an assisting lifting end.

[0031] A power-assisting spring, one end of which is connected to the battery mounting base, and the other end of which is connected to the connecting end;

[0032] The assist lifting end is adapted to protrude from the upper bottom surface under the elastic force of the assist spring on the connecting end.

[0033] Furthermore, the battery mounting base is also provided with a latching assembly;

[0034] The latch assembly includes symmetrically distributed locking and unlocking portions;

[0035] The locking part is adapted to lock the battery pack connected thereto;

[0036] The unlocking part is adapted to unlock the battery pack in the locked state. The unlocking part includes a first unlocking part and a second unlocking part. Each unlocking part is adapted to be operated individually to unlock the corresponding battery pack in a single way.

[0037] The first unlocking part and the second unlocking part are both located within the reachable area of ​​a human hand. A single touch action of the human hand can simultaneously activate the first unlocking part and the second unlocking part, thereby synchronously unlocking the locked state of the multiple battery packs.

[0038] Compared with the prior art, the beneficial technical effects of this application are as follows:

[0039] By placing the battery pack's central axis closer to the back, the center of gravity of the entire carrying frame is positioned closer to the user's back, thereby improving stability and balance while carrying the vehicle and reducing fatigue and discomfort caused by a shifted center of gravity. Furthermore, a closer battery pack center of gravity helps distribute weight more evenly across the back, reducing localized pressure and enhancing carrying comfort. Attached Figure Description

[0040] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0041] Figure 1 : A schematic diagram of the structure of a backpack blower according to a specific embodiment of this utility model;

[0042] Figure 2 : Exploded view of the backpack blower structure of a specific embodiment of this utility model;

[0043] Figure 3 : An exploded view of the structure of the carrying frame portion of a specific embodiment of this utility model;

[0044] Figure 4 Side view of the back frame structure in a specific embodiment of this utility model;

[0045] Figure 5 Cross-sectional view of the back frame structure of a specific embodiment of this utility model;

[0046] Figure 6 : Exploded view of the battery mounting structure of a specific embodiment of this utility model;

[0047] Figure 7 One of the schematic diagrams of the battery mounting base structure in a specific embodiment of this utility model;

[0048] Figure 8 : Schematic diagram of the battery mounting base structure of a specific embodiment of this utility model (II);

[0049] Figure 9 : Schematic diagram of the elastic assist component structure in a specific embodiment of this utility model. Detailed Implementation

[0050] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0051] Reference Figure 1 , Figure 2 and Figure 3 As shown, the present application provides a backpack blower 100, including a backpack frame 10, a blower assembly 40 and a battery pack 50 disposed in the backpack frame 10, and a shoulder strap assembly 20 and an air outlet duct assembly 30 connected to the backpack frame 10.

[0052] The carrying frame 10 includes a support member 10a near the side of the person carrying the load, a cover member 10b connected to the support member 10a, and a cover 10c that is movably hinged (e.g., pivotally connected) to the cover member 10b.

[0053] The covering member 10b corresponds to the blower assembly mounting part 11 of the supporting member 10a, and the cover 10c corresponds to the battery mounting part 12 of the supporting member 10a. In the assembly operation, the assembled blower assembly 40 is first positioned and connected to the blower assembly mounting part 11, and then the covering member 10b is correspondingly connected and fixed to the supporting member 10a to cover the blower assembly 40. The cover 10c can rotate along the hinged connection with the covering member 10b to close or open the battery mounting part 12.

[0054] Continue to refer to Figure 2 As shown, the back side S of the support member 10a is adapted to connect to the shoulder strap assembly 20. The shoulder strap assembly 20 includes a connecting part 20a and a shoulder strap 20b. The connecting part 20a is connected to the back side S of the support member 10a.

[0055] Continue to refer to Figure 3 As shown, the blower assembly 40 includes a drive motor 41 and a fan 42 arranged along the transverse axis; the drive motor 41 and the fan 42 are connected as one unit and fixedly installed in the duct 43 to form a duct assembly. A silencer 44 and an air inlet shroud 45 are arranged sequentially on the air inlet side of the fan 42, and are assembled and connected with the duct assembly to form the blower assembly 40.

[0056] Multiple battery packs 50, such as a first battery pack 50a and a second battery pack 50b, are adapted to provide power to a drive motor 41 to drive the drive motor 41 to rotate a fan 42 and generate airflow through the main duct of the blower assembly 40.

[0057] As described above, the carrying frame 10 includes a support member 10a near the side of the person carrying the load, and the support member 10a has a back cover S facing the back of the human body.

[0058] Multiple battery packs 50, such as a first battery pack 50a and a second battery pack 50b, are arranged side by side along a direction parallel to the transverse axis.

[0059] Reference Figure 4 As shown, the vertical central axes L1 of the multiple battery packs 50 are parallel to each other and are closer to the back side S than the vertical central axis L2 of the blower assembly.

[0060] By positioning the central axis L1 of the battery pack 50 closer to the backrest S, the center of gravity of the entire carrying frame is closer to the user's back, thereby improving stability and balance when carrying the vehicle. This reduces the pulling sensation on the front of the body during carrying, and minimizes fatigue and discomfort caused by a shift in the center of gravity. Furthermore, a closer center of gravity for the battery pack helps distribute weight more evenly across the back, reducing localized pressure and improving carrying comfort.

[0061] Furthermore, the vertical central axis L1 of the multiple battery packs 50, namely the first battery pack 50a and the second battery pack 50b, is located on the same plane, which makes the center of gravity of the entire backpack blower more concentrated and stable in the vertical direction. During the carrying process, it will not sway left and right or bounce up and down due to the dispersion of the center of gravity of the battery pack, thereby improving the stability when carrying.

[0062] Reference Figure 5 As shown, the battery pack 50 includes a first battery pack 50a and a second battery pack 50b.

[0063] The first battery pack 50a has a first center of gravity line S1, and the second battery pack 50b has a second center of gravity line S2; wherein...

[0064] The first center of gravity line S1 and the second center of gravity line S2 are located on both sides of the center of gravity line S3 of the drive motor 41, respectively.

[0065] By positioning the center of gravity lines S1 and S2 of the first battery pack 50a and the second battery pack 50b on either side of the center of gravity line S3 of the drive motor 41, the center of gravity of the entire backpack blower can be made more balanced. During carrying and use, the device will not tilt or become unstable due to excessive center of gravity shift to one side, thus improving the stability and safety of the device. This balanced center of gravity distribution makes it easier for the user to carry, reducing the extra burden and fatigue caused by center of gravity shift.

[0066] Furthermore, the drive motor is located within the region between the first center of gravity line S1 and the second center of gravity line S2.

[0067] Furthermore, the center line S4 of the area between the first center of gravity line S1 and the second center of gravity line S2 passes perpendicularly through the drive motor 41, further ensuring that the center of gravity distribution of the entire device is more reasonable and stable, reducing the sense of imbalance caused by weight dispersion. During carrying and use, the center of gravity of the device is in a more balanced state, reducing the swaying and instability caused by center of gravity shift.

[0068] It is also worth mentioning that:

[0069] The aforementioned centerline S4 is adjacent to and close to the center of gravity line S3 of the drive motor 41, with a distance H between them greater than or equal to 0 and less than 1 / 4 of the drive motor's axis length. This constraint helps ensure good center of gravity balance within a reasonable range. If the distance H is too large, the center of gravity of the battery pack may deviate too much from the center of gravity of the drive motor, thus affecting the overall stability and balance of the device. Limiting the distance to less than 1 / 4 of the drive motor's axis length can, to a certain extent, ensure that the center of gravity of the battery pack and the center of gravity of the drive motor are relatively close, which is beneficial for achieving a more stable carrying and operating experience.

[0070] It is understandable that the most preferred configuration is when the centerline S4 coincides with the center of gravity S3 of the drive motor 41, at which point H is 0, achieving perfect center of gravity balance. This ensures that the backpack blower will hardly tilt or sway due to center of gravity shift during carrying. It also reduces the extra physical exertion required by the user to maintain balance while carrying the backpack, alleviating fatigue and making long-term use more comfortable.

[0071] Additionally, refer to Figure 5 and Figure 6 As shown, the battery pack 50 is positioned above the blower assembly 40 to facilitate the removal and installation of the battery pack 50 and make it easier for users to operate.

[0072] The support member 10a includes an inwardly extending partition wall 13, which divides the inner side of the support member 10a into a blower assembly mounting portion 11 and a battery receiving portion 14.

[0073] Blower assembly mounting part 11 is suitable for mounting and connecting blower assembly 40;

[0074] Battery housing 14 is adapted to accommodate and place battery pack 50;

[0075] The battery housing 14 is located above the blower assembly mounting section 11.

[0076] The partition wall 13 clearly divides the internal space of the support member 10a, and the blower assembly mounting part 11 and the battery housing part 14 are independent of each other, avoiding interference between different components and improving the stability and reliability of the overall structure.

[0077] Furthermore, continue to refer to Figure 6 and Figure 7 As shown, it also includes:

[0078] A battery mounting base 60 is connected to a partition wall 13 to combine with a battery receiving portion 14 to form a battery mounting portion 12;

[0079] The battery mounting base 60 includes a first plug-in portion 61 and a second plug-in portion 62 that are symmetrically distributed and protrude from the surface of the mounting base, and each plug-in portion is provided with an electrical connection terminal 63.

[0080] The partition wall 13 provides support and positioning for the battery mounting base 60, making the battery mounting part 12 more secure and able to withstand the weight of the battery pack 50 and the vibration generated during use, reducing the risk of component loosening and damage.

[0081] Furthermore, the symmetrically distributed first and second insertion portions 61 on the battery mounting base 60 help balance the installation and connection of the battery pack 50. The symmetrical design ensures that the battery 50 is subjected to more even force during installation, reducing stress concentration caused by imbalance and improving the installation stability of the battery pack. Moreover, the symmetrical insertion portions facilitate the insertion and removal of the battery pack, allowing users to operate symmetrically from both sides, making it more convenient and faster, and improving usability.

[0082] Continue to refer to Figure 7 and Figure 8 As shown, the battery pack 50 installed and connected in the battery mounting part 12 is connected to the first plug-in part 61 and the second plug-in part 62 to realize the docking of the electrical connection terminal 63, and is spaced apart from the partition wall 13.

[0083] The battery pack 50 is spaced apart from the partition wall 13 to avoid direct contact between them. The lower part of the partition wall 13 forms part of the blower assembly mounting part 11, which is in direct contact with the blower assembly 40. During operation, the blower assembly 40 vibrates significantly at this location due to the fan, motor, and high-speed airflow. By keeping the battery pack 50 spaced apart from the partition wall 13, the significant vibration generated by the blower assembly 40 can be effectively prevented from being directly transmitted to the battery pack 50.

[0084] Furthermore, during a drop, the spacing between the battery pack 50 and the partition wall 13 provides a buffer space for the battery pack 50. When the device is impacted, the partition wall 13 does not directly transmit the impact force to the battery pack 50, but rather partially absorbs and disperses the impact force through the air or other medium in the space, thereby reducing the direct impact intensity on the battery pack. Moreover, the spacing reduces the contact stress between the battery pack and the partition wall at the moment of drop. Without the spacing, the battery pack and the partition wall may experience a large instantaneous contact force during a drop, easily leading to problems such as battery pack casing breakage and internal component damage. The spacing reduces this instantaneous stress, improving the battery pack's resistance to damage during drops.

[0085] Specifically, such as Figure 7 and Figure 8 As shown, the upper bottom surface 64 of the battery mounting base 60 protrudes from the partition wall 13 relative to the bottom of the battery pack 50, has a height difference H2 with the partition wall 13, and is provided with an elastic assist member 65 on the upper bottom surface 64 suitable for abutting against the battery pack 50 to assist in the disassembly and removal of the battery pack 50.

[0086] On the one hand, when it is necessary to remove the battery pack 50, the elastic assist 65 abuts against the battery pack 50 and can provide an upward elastic force. This elastic force can help the user easily remove the battery 50 from the battery mounting bracket 60, greatly reducing the difficulty of disassembly and the effort required.

[0087] On the other hand, by maintaining a distance between the battery pack 50 and the partition wall 13 to avoid direct contact between them, when the battery pack 50 is installed, it only contacts the elastically designed support member 65, further minimizing direct contact with other components that may transmit vibrations. The elastically designed support member 65 can more effectively absorb and buffer vibrations from all directions, providing a more stable installation environment for the battery pack 50 and protecting its internal structure and electronic components from vibration damage.

[0088] Further reference Figure 9 As shown, the elastic assist component 65 includes:

[0089] The assist arm 650 is hinged to the battery mounting base 60 via a pin 651 and is adapted to rotate along the pin 651. The assist arm 650 includes a connecting end 650a and an assist lifting end 650b.

[0090] The assist spring 652 has one end connected to the battery mounting base 60 and the other end connected to the connecting end 650a;

[0091] The lifting end 650b is adapted to protrude from the upper bottom surface 64 under the elastic force of the lifting spring 652 on the connecting end 650a.

[0092] The assist lifting end 650b protrudes from the upper bottom surface 64 under the action of the assist spring 652. When the battery pack is installed, the battery pack compresses the assist lifting end 650b, causing the assist arm 650 to rotate around the pin, while simultaneously compressing the assist spring 652. When the battery pack needs to be removed, the elastic restoring force of the assist spring 652 is transmitted to the assist lifting end 650b through the connecting end 650a, lifting the battery pack 50 upwards, facilitating quick removal of the battery pack and improving operational convenience.

[0093] After the battery pack 50 is installed, the elastic force of the assist spring 652 continuously acts on the battery pack 50 through the assist lifting end 650b. At this time, the assist spring 652 not only provides lifting and support forces, but also plays a role in buffering and shock absorption. During equipment operation, the assist spring can absorb and buffer vibrations and impacts from the outside, reducing the impact on the battery pack and protecting the internal structure and electronic components of the battery pack.

[0094] Furthermore, a latch assembly 66 is also provided on the battery mounting base;

[0095] The latch assembly 66 includes symmetrically distributed locking portions 660 and unlocking portions 661;

[0096] The locking part 660 is adapted to lock the battery pack 50 connected thereto.

[0097] The unlocking part 661 is adapted to unlock the battery pack 50 in the locked state. The unlocking part 661 includes a first unlocking part 661a and a second unlocking part 661b. Each unlocking part is adapted to be operated individually to unlock the corresponding battery pack 50 in one go, and / or.

[0098] The first unlocking part 661a and the second unlocking part 661b are both located within the touchable area of ​​a human hand. A touch action of the human hand can simultaneously activate the first unlocking part 661a and the second unlocking part 661b, thereby unlocking the locked state of the first battery pack 50a and the second battery pack 50b.

[0099] This provides a flexible and convenient unlocking function.

[0100] Individual unlocking: Each unlocking unit can be operated independently to unlock its corresponding battery pack, providing users with greater flexibility. For example, in some situations, a user may only need to replace one battery pack without having to unlock both packs simultaneously. This individual unlocking feature simplifies operation and improves ease of use.

[0101] Synchronous unlocking function: When both the first and second unlocking parts are within the reach of a single hand, a single touch of the hand can activate both unlocking parts simultaneously, unlocking both battery packs synchronously. This is very convenient when needing to replace two battery packs simultaneously or perform other operations, saving time and steps.

[0102] Furthermore, the design takes into account the user's practical operational needs, allowing the unlocking operation to be completed with one hand. This is very convenient in actual use, especially when users need to change the battery pack in confined spaces or other situations where it is inconvenient to operate with both hands; the one-handed unlocking function can improve the user experience.

[0103] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A backpack blower, comprising: Carrying frame; A blower assembly, disposed within the backpack frame, the blower assembly including a drive motor and a fan arranged along a transverse axis; Multiple battery packs are adapted to provide power to the drive motor to drive the motor to rotate the fan and generate airflow through the main air duct of the blower assembly; Its features are: The carrying frame includes a support member near the person's back, the support member having a back side facing the back of the person; Multiple battery packs are arranged side by side along a direction parallel to the transverse axis; The vertical central axes L1 of the multiple battery packs are parallel to each other and are respectively closer to the back side than the vertical central axis L2 of the blower assembly.

2. The backpack blower according to claim 1, characterized in that: The vertical central axes L1 of the multiple battery packs are located in the same plane.

3. The backpack blower according to claim 1, characterized in that: The battery pack includes a first battery pack and a second battery pack; The first battery pack has a first center of gravity line S1, and the second battery pack has a second center of gravity line S2; The first center of gravity line S1 and the second center of gravity line S2 are located on both sides of the center of gravity line S3 of the drive motor.

4. The backpack blower according to claim 3, characterized in that: The drive motor is located within the region between the first center of gravity line S1 and the second center of gravity line S2.

5. The backpack blower according to claim 3, characterized in that: The center line of the region of the first center of gravity line S1 and the second center of gravity line S2 passes perpendicularly through the drive motor.

6. The backpack blower according to any one of claims 1 to 5, characterized in that: The battery pack is positioned above the blower assembly.

7. The backpack blower according to claim 6, characterized in that, The support member includes an inwardly extending partition wall that divides the inner side of the support member into a blower assembly mounting section and a battery receiving section. The blower assembly mounting part is adapted to install and connect the blower assembly; The battery housing is adapted to accommodate and house the battery pack; The battery housing is located above the blower assembly mounting section.

8. The backpack blower according to claim 7, characterized in that, Also includes: A battery mounting base, which is connected to the partition wall to combine with the battery receiving portion to form a battery mounting portion; The battery mounting base includes a first plug-in portion and a second plug-in portion that are symmetrically distributed and protrude from the surface of the mounting base, and each plug-in portion is provided with an electrical connection terminal.

9. The backpack blower according to claim 8, characterized in that: The battery pack installed and connected in the battery mounting part is connected to the first plug-in part and the second plug-in part to realize the docking of electrical connection terminals, and is spaced apart from the partition wall.

10. The backpack blower according to claim 9, characterized in that: The upper bottom surface of the battery mounting base protrudes from the partition wall relative to the bottom of the battery pack, has a height difference with the partition wall, and is provided with an elastic assisting member on the upper bottom surface to abut against the battery pack, so as to assist in the disassembly and removal of the battery pack.

11. The backpack blower according to claim 10, characterized in that, The elastic assist component includes: An assisting arm is hinged to the battery mounting base via a pin and is adapted to rotate along the pin. The assisting arm includes a connecting end and an assisting lifting end. A power-assisting spring, one end of which is connected to the battery mounting base, and the other end of which is connected to the connecting end; The assist lifting end is adapted to protrude from the upper bottom surface under the elastic force of the assist spring on the connecting end.

12. The backpack blower according to claim 8, characterized in that: The battery mounting base is also provided with a latch assembly; The latch assembly includes symmetrically distributed locking and unlocking portions; The locking part is adapted to lock the battery pack connected thereto; The unlocking part is adapted to unlock the battery pack in the locked state. The unlocking part includes a first unlocking part and a second unlocking part. Each unlocking part is adapted to be operated individually to unlock the corresponding battery pack in a single way. The first unlocking part and the second unlocking part are both located within the reachable area of ​​a human hand. A single touch action of the human hand can simultaneously activate the first unlocking part and the second unlocking part, thereby synchronously unlocking the locked state of the multiple battery packs.

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