A debarker

Abstract

The present application belongs to the technical field of edge trimmer, and particularly relates to an edge trimmer, which comprises: a blade protection shell, a handle, a rotatable blade assembly and a driving motor for driving the rotation of the blade assembly are arranged on the blade protection shell; and a battery pack, which is installed on the blade protection shell, with the gravity center of the battery pack located in the projection area of the rotation plane of the blade assembly or in a preset range extending from the projection area to the handle direction. The present application shifts the battery pack from the rear of the handle to the blade protection shell, moves the gravity center of the whole machine to the vicinity of the blade assembly area, greatly reduces the wrist downward pressure required to be applied by the operator, and relieves fatigue. The front layout of the battery pack directly adds its own weight to the working part, provides a continuous and stable normal load for the blade assembly, and improves the cutting stability and efficiency.

Description

Technical Field

[0001] This invention belongs to the field of edge trimming machine technology, and specifically relates to an edge trimming machine. Background Technology

[0002] Most existing edge trimming machines have the battery pack installed at the end behind the handle. This layout causes the machine's center of gravity to be heavily shifted behind the operator's wrist, resulting in many drawbacks:

[0003] First, the weight of the battery pack itself creates a large backward tilting torque, forcing the operator to continuously apply downward pressure to maintain contact between the blade and the workpiece. Long-term operation can easily lead to wrist fatigue and unstable operation.

[0004] Secondly, the rear-mounted battery pack cannot participate in the counterweight of the working part. During the cutting process, the blade lacks sufficient normal load (downward pressure). The cutting efficiency and surface finish are heavily dependent on the operator's manual pressure. The lack of sufficient downward pressure when the blade cuts affects the cutting efficiency and accuracy.

[0005] In addition, the distance between the battery pack and the front drive motor is relatively far, spanning the entire length of the handle. This results in a long power transmission path, significant line loss, and reduced battery utilization. Summary of the Invention

[0006] The present invention addresses the technical problem of unbalanced control torque caused by the battery pack being mounted on the handle, and aims to provide an edge trimming machine.

[0007] An edge trimming machine, the edge trimming machine comprising:

[0008] A blade protective housing, wherein the blade protective housing is provided with a handle, a rotatable blade assembly, and a drive motor for driving the blade assembly to rotate;

[0009] A battery pack is mounted on the blade protective housing, and the center of gravity of the battery pack is located within the rotational plane projection area of ​​the blade assembly or within a predetermined range extending from that area toward the handle.

[0010] Optionally, the preset range is a range extending radially from the edge of the projection area of ​​the rotation plane along the blade assembly, not exceeding the rotation radius of the blade assembly.

[0011] Optionally, a mounting base extending axially along the blade assembly is provided on one side of the blade protective housing, and the battery pack is mounted on the mounting base.

[0012] Optionally, the battery pack is detachably mounted to the mounting base by means of clips or screws.

[0013] Optionally, the mounting base is provided with an elastic electrode that is in electrical contact with the battery pack, and the elastic electrode is connected to the drive motor through an elastic wire.

[0014] Optionally, the battery pack is disposed on the first side of the blade protective shell or on the second side opposite to the first side.

[0015] Optionally, the battery pack includes two sub-battery packs connected in series, the two sub-battery packs being symmetrically arranged on opposite sides of the blade protective shell.

[0016] Optionally, the battery pack includes multiple sub-battery packs, which are respectively arranged on the blade protective shell.

[0017] Optionally, the blade protective housing is provided with a heat dissipation duct, and the bottom of the battery pack is attached to the wall of the heat dissipation duct so as to use the airflow generated by the rotation of the blade assembly to cool the battery pack.

[0018] Optionally, the blade protective housing is provided with a sliding groove, and the mounting base is slidably fitted into the sliding groove and can slide along the sliding groove to adjust the position of the battery pack on the blade protective housing; the battery pack is positioned on the sliding groove by a positioning member.

[0019] Optionally, the slide is an arc-shaped slide, and the center of curvature of the arc-shaped slide is located on the rotation axis of the blade assembly.

[0020] Optionally, the slide groove is provided with a plurality of shell-side pin holes; the battery pack is provided with a fixing part, and the fixing part is provided with battery-side pin holes; the positioning member adopts a locking pin, and the battery pack is positioned on the slide groove by inserting the locking pin into the battery-side pin holes and the shell-side pin holes respectively.

[0021] Beneficial effects: The present invention has at least one or more of the following advantages:

[0022] 1. Significantly improves operating comfort and reduces labor intensity: By transferring the battery pack from the back of the handle to the blade protective shell, the center of gravity of the whole machine is moved forward to the vicinity of the blade assembly area, which greatly reduces the downward pressure on the operator's wrist and alleviates fatigue.

[0023] 2. Significantly improves cutting stability: The front-mounted layout of the battery pack allows its own weight to be directly superimposed on the working area, providing a continuous and stable normal load for the blade assembly, thus improving cutting stability and efficiency.

[0024] 3. Reduced energy consumption and extended range: The front-mounted battery pack shortens the power transmission path between the battery pack and the drive motor, reduces line impedance loss, and improves energy utilization. With the same battery capacity, the working time of a single charge can be extended.

[0025] 4. Compact structure and no need for additional counterweight: This invention cleverly uses the weight of the battery pack itself as a counterweight, eliminating the need for additional counterweight blocks. This reduces material costs and the overall weight of the machine, which is conducive to miniaturization of the tool and has significant market competitive advantages and industrial promotion value.

[0026] 5. Enhanced tool versatility and adaptability: This invention allows for optional left and right side arrangement of the battery pack or a symmetrical arrangement on both sides, catering to operators with different hand habits; the symmetrical layout of the battery pack ensures zero lateral torque of the entire machine while maintaining the same total weight, further reducing the operator's lateral torsional burden; the mounting base allows the mounting pack to slide on the blade protective shell, adapting to the cutting needs of workpieces of different materials, achieving the goal of multi-purpose use.

[0027] 6. Innovative heat dissipation effect: The battery pack is fitted into the heat dissipation duct of the protective shell and uses the rotating airflow generated by the blade itself for forced cooling. This solves the problem of battery temperature rise under high load conditions without increasing any additional power consumption, thereby improving battery safety and cycle life. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of one structure of the present invention;

[0029] Figure 2 for Figure 1 A magnified view of a portion of the image;

[0030] Figure 3 for Figure 1 Side view;

[0031] Figure 4 for Figure 1 A partially enlarged schematic diagram of the battery pack;

[0032] Figure 5 for Figure 4 AA section view;

[0033] Figure 6 This is a magnified view of a portion of the structure of the battery pack when its position is adjustable.

[0034] Figure 7 This is a diagram showing the relationship between the rotation axis, the projection area of ​​the rotation plane, and the preset range of the present invention.

[0035] Figure 8 This is a schematic diagram of a structure according to Embodiment 1 of the present invention. Detailed Implementation

[0036] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, so as to better understand the purpose, features and advantages of the present invention. It should be understood that the embodiments shown in the drawings are not intended to limit the scope of the present invention, but are only for illustrating the essential spirit of the technical solution of the present invention.

[0037] In the following description, certain specific details are set forth for the purpose of illustrating various disclosed embodiments in order to provide a thorough understanding of the various disclosed embodiments. However, those skilled in the art will recognize that the embodiments may be practiced without one or more of these specific details. In other instances, well-known apparatuses, structures, and techniques associated with this application may not have been shown or described in detail to avoid unnecessarily obscuring the description of the embodiments.

[0038] Throughout this specification, references to "an embodiment" or "an embodiment" indicate that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Therefore, the appearance of "in an embodiment" or "an embodiment" in various places throughout the specification does not necessarily refer to the same embodiment. Furthermore, a particular feature, structure, or characteristic may be combined in any manner in one or more embodiments.

[0039] In the following description, in order to clearly demonstrate the structure and operation of the present invention, a number of directional terms will be used. However, terms such as "front", "back", "left", "right", "outside", "inside", "outward", "inward", "up", and "down" should be understood as convenient terms and not as limiting terms.

[0040] This invention provides an edge trimming machine, which includes a blade protective shell, a handle, a rotatable blade assembly, a drive motor for driving the blade assembly to rotate, and a battery pack. The handle, the blade assembly, and the drive motor are all mounted on the blade protective shell.

[0041] The battery pack is also mounted on the blade protective shell, and the center of gravity of the battery pack is located within the rotational plane projection area of ​​the blade assembly or within a preset range extending from that area toward the handle.

[0042] This invention completely eliminates the backward tilting torque caused by a rear-mounted battery pack by moving the battery pack from behind the handle to the blade protective shell and defining the center of gravity position, thus shifting the overall center of gravity forward to the working area. The weight of the battery pack is directly converted into the normal load when the blade cuts into the workpiece, significantly reducing wrist fatigue and improving cutting stability and efficiency.

[0043] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0044] Reference Figures 1 to 7This invention provides an edge trimming machine, which includes a blade protective shell 10, a handle 20, a blade assembly 30, a drive motor 40, and a battery pack 50.

[0045] The handle 20 has a first end and a second end, the first end of which is connected to the blade guard 10, and the second end of which extends in a direction away from the cutting end 30a of the blade assembly 30.

[0046] The blade assembly 30 is rotatably mounted on the blade protective housing 10, and the rotation axis A of the blade assembly 20 is as follows: Figure 3 As shown, the blade in the blade assembly 20 rotates about the rotation axis A to perform the trimming task on the workpiece.

[0047] The drive motor 40 is used to drive the blade assembly 20 to rotate, and the drive motor 40 is mounted on the blade protective housing 10. Figure 3 As shown, the drive motor 40 is preferably positioned above the blade assembly 20. The motor shaft of the drive motor 40 can be directly or through a transmission assembly to connect to the blade assembly 20 in order to drive the blade assembly 20.

[0048] Unlike existing technologies, the battery pack 50 of the present invention is mounted on the blade protective shell 10, and the center of gravity of the battery pack 50 is located within the rotational plane projection area of ​​the blade assembly 20 or within a predetermined range extending from that area toward the handle 20.

[0049] Among them, reference Figure 7 The point in the middle refers to the rotation axis A. The projection area B of the rotation plane is the blue part, which is the orthographic projection of the circular trajectory plane swept by the outermost edge of the blade assembly 20 when it rotates around its rotation axis A onto a plane perpendicular to the rotation axis A. The preset range C is the green part, which refers to a fan ring extending from the edge of the above projection area along the handle direction. The circular angle α of this fan ring is preferably 0°~180°, more preferably 45°~90°; where 0° means that the center of gravity of the battery pack 50 is located on a straight line extending from the rotation axis towards the handle 20. In specific implementation, this fan ring is a fan ring extending to both sides with the straight line extending from the rotation axis towards the handle 20 as the center line, or this fan ring is a fan ring extending to both sides with the axis of the handle 20 as the center line.

[0050] The present invention limits the center of gravity of the battery pack 50, so that the weight of the battery pack 50 can be effectively applied to the blade cutting operation.

[0051] The battery pack 50 of the present invention is used as a power supply device, that is, the battery pack 50 is electrically connected to the drive motor 40, and the battery pack 50 supplies power to the drive motor 40.

[0052] The battery pack 50 of the present invention can also be used as a pure counterweight. That is, the battery pack 50 of the present invention can be used without connecting to the drive motor 40, and the drive motor 40 can still use the original power supply device provided on the handle 20. In specific implementation, the battery pack 50, which serves as a counterweight, can be equipped with a quick-connect interface / quick-connect cable. When the original power supply device fails to provide power, the battery pack 50 can be used as a backup power source to connect to the drive motor 40 through the quick-connect interface / quick-connect cable.

[0053] Of course, the battery pack 50 of the present invention is preferably used as both a power supply device and a counterweight, that is, preferably without any other power supply device on the handle 20.

[0054] In one embodiment, the preset range is a range extending radially from the edge of the projection area of ​​the rotating plane along the blade assembly 20 without exceeding the rotation radius of the blade assembly 20.

[0055] Reference Figure 7 The rotation radius of the blade assembly 20 is the radius R of the projection area B of the rotation plane, so the outer circle radius of the fan ring in the preset range C should be less than 2R.

[0056] In one embodiment, reference is made to Figure 3 The blade protective housing 10 has a mounting base 11 extending axially along the blade assembly 20 on one side, and the battery pack 50 is mounted on the mounting base 11. The mounting base 11 provides stable physical support for the battery pack 50.

[0057] In practice, the battery pack 50 is preferably detachably mounted to the mounting base 11 via clips or screws. The clips or screws allow for quick assembly and disassembly, facilitating the replacement of the battery pack 50.

[0058] In one embodiment, the mounting base 11 is provided with an elastic electrode that is in electrical contact with the battery pack 50, and the elastic electrode is connected to the drive motor 40 through an elastic wire.

[0059] Reference Figure 4 and Figure 5 In specific implementation, the battery pack 50 is provided with electrode contacts 51, which are electrically connected to the elastic electrode.

[0060] In this embodiment, the flexible wire can be partially passed through the inside of the blade protective shell 10, partially exposed on the surface of the blade protective shell 10, or partially placed in the groove on the blade protective shell 10, depending on the actual implementation scenario.

[0061] In practical implementation, flexible conductors can be spring / spiral shaped to achieve good flexibility. The excellent flexibility and resistance to bending fatigue of flexible conductors allow them to adapt to the confined space inside the protective housing and the slight vibrations during blade rotation, ensuring a short and reliable power transmission path and reducing line loss.

[0062] In one embodiment, to balance left and right hand operation, the battery pack 50 is disposed on a first side of the blade protective shell 10 or a second side opposite to the first side.

[0063] When the second end of the handle 20 is located behind the blade protective housing 10, and the cutting end 30a of the blade assembly 30 is located in front, the battery pack 50 is located on the left or right side of the blade protective housing 10.

[0064] In one embodiment, the battery pack 50 includes two sub-battery packs connected in series, and the two sub-battery packs 50 are symmetrically arranged on opposite sides of the blade protective housing 10.

[0065] In this embodiment, two smaller capacity battery packs are symmetrically arranged on both sides of the blade protective shell 10 to achieve universal balance. This arrangement makes the lateral torque of the whole machine zero, eliminates the lateral torsional load, achieves true left- or right-handed usability, and keeps the total weight unchanged, taking into account both large capacity power supply and operational balance.

[0066] In one embodiment, the battery pack 50 includes a plurality of sub-battery packs, which are respectively arranged on the blade protective housing 10.

[0067] In this embodiment, the number and position of the multiple sub-battery packs can be set according to the gravity balance of the whole machine. However, the center of gravity of at least some of the sub-battery packs needs to be located within the rotational plane projection area of ​​the blade assembly 20 or within a preset range extending from that area toward the handle 20.

[0068] For example, multiple sub-battery packs can be arranged along... Figure 7 The arrangement shown is equidistant in the circumferential direction within the projection area of ​​the plane of rotation, or it can be evenly distributed along the circumference in the fan-shaped ring positions. Of course, it can also be arranged according to the actual gravity balance requirements.

[0069] In this embodiment, some of the multiple sub-battery packs can be used as power supply devices connected to the drive motor, while others can be used as counterweights. This configuration can be tailored to specific needs. This flexible allocation of power supply and counterweight roles allows for adjustment of the machine's overall gravity balance by changing the position of the counterweights, adapting to different operating and gripping habits. Furthermore, when some sub-battery packs run out of power, other sub-battery packs can be switched to provide power, preventing power outages and ensuring continuous operation. This enhances usability and operational endurance.

[0070] When some sub-battery packs in a multi-sub-battery pack are used as power supply devices, the multiple sub-battery packs can be connected in series. When other sub-battery packs are used as counterweights, each sub-battery pack operates independently.

[0071] In one embodiment, reference is made to Figure 2 and Figure 6 The blade protective shell 10 is provided with a heat dissipation duct 12, and the bottom of the battery pack 50 is attached to the wall of the heat dissipation duct 12 so as to use the airflow generated by the rotation of the blade assembly 20 to cool the battery pack 50.

[0072] This embodiment does not require an additional cooling fan. It makes full use of the airflow generated by the rotation of the blades during the operation of the trimmer to remove the working heat of the battery pack 50, achieving zero-power passive forced cooling, which effectively extends the continuous working life and safety of the battery pack 50.

[0073] In a specific implementation, a blade assembly 20 is provided below the upper surface of the blade protective shell 10. The side wall of the blade protective shell 10 wraps around the blade assembly 20. The part of the blade assembly 20 exposed above the blade protective shell 10 is the cutting end 30a. The heat dissipation duct 12 consists of several through holes or through slots on the upper surface of the blade protective shell 10. The battery pack 50 is provided on the upper surface of the blade protective shell 10 and its bottom part is attached to the through holes or through slots.

[0074] In one embodiment, reference is made to Figure 6 The blade protective housing 10 is provided with a sliding groove 13, and the mounting base 11 is slidably assembled in the sliding groove 13 and can slide along the sliding groove 13 to adjust the position of the battery pack 50 on the blade protective housing 10; when the position of the battery pack 50 is determined, the battery pack 50 is positioned on the sliding groove 13 by the positioning member.

[0075] The design of this embodiment enables the same trimming machine to have adaptive working conditions: when cutting soft materials, the battery pack 50 is moved forward (i.e., moved closer to the cutting end 30a) to increase the downward pressure and improve the feed efficiency; when cutting hard materials, the battery pack 50 is moved backward (i.e., moved closer to the handle 20) to reduce the load on the blade and prevent chipping or jamming, which greatly expands the applicability of the tool.

[0076] In this embodiment, the mounting base 11 is designed separately from the blade protective shell 10. To enable the movement of the battery pack 50, the mounting base 11 is slidably connected to the slide groove 13. The battery pack 50 is assembled on the mounting base 11 and slides on the blade protective shell 10 together with the mounting base 11. At this time, if the battery pack 50 is connected to the drive motor 40 through the elastic wire 70, part of the elastic wire 70 can be placed in the slide groove 13.

[0077] When this invention has multiple sub-battery packs, the following can be implemented according to actual needs: some sub-battery packs can be slidably adjusted in position using the design of this embodiment, while other sub-battery packs can be directly fixed to a predetermined position on the blade protective shell via a mounting base. Alternatively, all sub-battery packs can be slidably adjusted in position using the design of this embodiment.

[0078] In one embodiment, the slide 13 is an arc-shaped slide, and the center of curvature of the arc-shaped slide 13 is located on the rotation axis of the blade assembly 20.

[0079] After the design of this embodiment, the following effects can be achieved:

[0080] Maintaining a constant normal load direction: When the battery pack moves along an arc centered on the axis of the blade assembly 20, the line of action of the battery pack's gravity always passes perpendicularly through the rotation center of the blade assembly 20. When adjusting the forward and backward position, the downward pressure provided by gravity on the blade cutting into the workpiece will not deviate, ensuring that the direction of the torque of the battery pack's own weight relative to the cutting point of the blade remains constant. Only the magnitude of the torque changes, ensuring the consistency of the force direction at different settings, thus achieving a precise counterweight control that is "direction-unbiased and force-adjustable".

[0081] If a straight slide is used, the center of gravity of the battery pack will move away from or closer to the rotation center of the blade assembly 20 when the battery pack moves back and forth, causing a change in the gravitational lever arm and resulting in additional torque.

[0082] Achieving stepless fine-tuning of the center of gravity: The arc-shaped slide can achieve continuous and smooth adjustment of the center of gravity.

[0083] In specific implementation, the slide 12 is preferably located within the rotational plane projection area of ​​the blade assembly 20.

[0084] In one embodiment, the positioning of the battery pack 50 on the slide groove 13 can be achieved in the following manner:

[0085] The slide groove 13 is provided with a plurality of shell-side pin holes 14, which are arranged along the sliding direction of the battery pack 50. The battery pack 50 or the mounting base 11 is provided with a fixing part, which is provided with battery-side pin holes; the positioning component is a locking pin 60, which is used to position the battery pack 50 on the slide groove 13 by inserting the locking pin 60 into the battery-side pin hole and one of the shell-side pin holes 14 respectively.

[0086] In practical implementation, a limiting hole can be provided on the fixing part, and an elastic element is provided on the locking pin 60. When the locking pin 60 is inserted into the battery-side pin hole and one of the shell-side pin holes 14 respectively, the elastic element is inserted into the limiting hole to realize the self-locking function after the locking pin 60 is inserted. Due to the setting of the elastic element, the locking pin 60 can also be easily pulled out from the battery-side pin hole and the shell-side pin hole 14 by external force.

[0087] The trimming machine provided in the above embodiments of the present invention can also be applied to various handheld electric cutting machines, chamfering machines, and other handheld power tools, and is especially suitable for industrial decoration and sheet metal processing scenarios with long-term continuous operation. These handheld power tools typically have the blade protective shell, handle, blade assembly, drive motor, and battery pack of the trimming machine of the present invention. By limiting the center of gravity of the battery pack, the weight of the battery pack can be effectively applied to the blade cutting operation.

[0088] Example 1:

[0089] A lithium battery pack with a rated voltage of 18V and a capacity of 2AH is selected. Its shape is cuboid, with a length of 110mm, a width of 74mm, and a height of 70mm. The blade protective shell is made of die-cast aluminum alloy. The drive motor is located on the outer side of the protective shell, and the output shaft of the drive motor drives the blade assembly to rotate through gear transmission.

[0090] Reference Figure 8 This is a schematic diagram of one state of the trimming machine in use according to this embodiment. In this embodiment, the lithium battery pack 50a is moved from the original end position behind the handle 20 to the blade protective shell 10. The center of gravity of the lithium battery pack 50a shifts downward, and the center of gravity of the lithium battery pack 50a is located in the rotational plane projection area of ​​the blade assembly 30, which also causes the center of gravity of the entire machine to shift downward. Figure 8 As shown, the downward lateral distance is 513.73. When the blade assembly acts on the workpiece, it significantly reduces the downward pressure that the operator needs to apply to the handle 20, alleviating fatigue. The weight of the lithium battery pack 50a itself is directly superimposed on the working part, providing a continuous and stable normal load for the blade assembly.

[0091] The preferred embodiments of the present invention have been described in detail above. However, it should be understood that after reading the above teachings, those skilled in the art can make various alterations or modifications to the present invention. These equivalent forms also fall within the scope defined by the appended claims.

Claims

1. A trimming machine, characterized in that, The trimming machine includes: A blade protective housing, wherein the blade protective housing is provided with a handle, a rotatable blade assembly, and a drive motor for driving the blade assembly to rotate; A battery pack is mounted on the blade protective housing, and the center of gravity of the battery pack is located within the rotational plane projection area of ​​the blade assembly or within a predetermined range extending from that area toward the handle.

2. The trimming machine as described in claim 1, characterized in that, The preset range is a range extending radially from the edge of the projection area of ​​the rotating plane along the blade assembly, not exceeding the rotation radius of the blade assembly.

3. The trimming machine as described in claim 1, characterized in that, The blade protective housing has a mounting base extending axially along the blade assembly on one side, and the battery pack is mounted on the mounting base.

4. The trimming machine as described in claim 3, characterized in that, The battery pack is detachably mounted to the mounting base by means of clips or screws.

5. The trimming machine as described in claim 3, characterized in that, The mounting base is provided with an elastic electrode that is in electrical contact with the battery pack, and the elastic electrode is connected to the drive motor through an elastic wire.

6. The trimming machine as described in claim 1, characterized in that, The battery pack is disposed on the first side of the blade protective shell or on the second side opposite to the first side; Alternatively, the battery pack may include two sub-battery packs connected in series, with the two sub-battery packs symmetrically arranged on opposite sides of the blade protective shell; Alternatively, the battery pack may include multiple sub-battery packs, each of which is arranged on the blade protective shell.

7. The trimming machine as described in claim 1, characterized in that, The blade protective shell is provided with a heat dissipation duct, and the bottom of the battery pack is attached to the wall of the heat dissipation duct so as to use the airflow generated by the rotation of the blade assembly to cool the battery pack.

8. The trimming machine as described in any one of claims 3 to 5, characterized in that, The blade protective shell is provided with a sliding groove, and the mounting base is slidably assembled in the sliding groove and can slide along the sliding groove to adjust the position of the battery pack on the blade protective shell; the battery pack is positioned on the sliding groove by a positioning member.

9. The trimming machine as described in claim 8, characterized in that, The slide is an arc-shaped slide, and the center of curvature of the arc-shaped slide is located on the rotation axis of the blade assembly.

10. The trimming machine as described in claim 8, characterized in that, The slide groove is provided with a plurality of shell-side pin holes; the battery pack or the mounting base is provided with a fixing part, and the fixing part is provided with battery-side pin holes; the positioning member adopts a locking pin, and the battery pack is positioned on the slide groove by inserting the locking pin into the battery-side pin holes and the shell-side pin holes respectively.

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