Split type electric power tool

Abstract

The application relates to a split electric tool, which comprises a tool body and a battery seat, the tool body is provided with a holding part, the bottom of the holding part is provided with a receiving cavity, the top of the battery seat is provided with an extension part which can be inserted into the receiving cavity, a first damping mechanism is arranged in the receiving cavity, the first damping mechanism comprises a clamping sleeve fixed at the opening of the receiving cavity and a driving seat movably arranged above the clamping sleeve, an elastic damping layer is arranged on the inner wall of the clamping sleeve, the driving seat can control the clamping sleeve to contract radially inwardly through a driving assembly, so that the elastic damping layer clamps the extension part, and the purpose of the application is to provide a split electric tool, so as to solve the technical problem that the damping effect and the disassembly convenience of the existing split electric tool cannot be considered simultaneously.

Description

Technical Field

[0001] This invention belongs to the field of power tool technology, and particularly relates to a split-type power tool. Background Technology

[0002] Electric drills are among the most widely used power tools. To facilitate the connection of battery packs of different sizes and structures to electric drills without redesigning and manufacturing the entire drill housing, split-type electric drills have appeared on the market. Their battery holders are detachably installed as independent accessories at the bottom of the handle, such as the utility model patent with publication number "CN217317886U" entitled "Split-type Electric Drill".

[0003] However, when the aforementioned split-type electric drill is in operation, the violent vibrations generated by the motor operation and drill bit cutting will be directly transmitted to the battery holder through the handle. This will cause the precision components such as the control board inside the battery holder to move due to continuous vibration, resulting in malfunctions such as component desoldering and board cracking, which seriously affects the service life and control reliability of the electric drill.

[0004] In existing technologies, the most common approach is to use a simple damping mechanism, i.e., a shim, at the connection between the battery holder and the handle to absorb vibrations. However, this method has significant drawbacks. First, flat shims can only absorb a portion of axial vibrations, with limited effectiveness in suppressing radial vibrations, making it difficult to effectively protect the control board. Second, detachable structures require a clearance at the connection point. While interference-fit shims can increase damping, they make inserting and removing the battery holder extremely difficult, and may even scratch or damage the shims during insertion, thus negating the damping effect. If clearance-fit shims are used, they cannot fit tightly against the mating surface during operation, resulting in negligible damping. Therefore, a separate power tool is needed that does not affect the ease of battery holder assembly, effectively attenuates vibrations transmitted to the battery holder during tool operation, and does not damage the damping mechanism during assembly. Summary of the Invention

[0005] The purpose of this invention is to provide a split-type power tool to solve the technical problem that existing split-type power tools cannot simultaneously achieve both vibration reduction effect and ease of assembly and disassembly.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a split-type power tool, comprising a tool body and a battery holder, the tool body having a grip portion, the bottom of the grip portion having a receiving cavity, the top of the battery holder having an extension portion that can be inserted into the receiving cavity, the receiving cavity having a first vibration damping mechanism, the first vibration damping mechanism comprising a clamping sleeve fixed to the opening of the receiving cavity and a drive seat movably disposed above the clamping sleeve, the inner wall of the clamping sleeve having an elastic damping layer, the drive seat being able to control the clamping sleeve to radially retract inward through a drive component, so that its elastic damping layer clamps the extension portion.

[0007] Preferably, the tool body is provided with an operation switch, and the drive assembly includes a linkage and a drive rod. The linkage is fixedly connected to the operation switch and can move synchronously with it. The drive rod is disposed on one side of the linkage and can drive the drive seat to move, so as to convert the pressing stroke of the operation switch into a locking drive force that drives the drive seat to move axially along the receiving cavity.

[0008] Preferably, the drive seat includes a clamping cone sleeve and a pressing rod. The pressing rod is fixedly connected to the upper end of the clamping cone sleeve and extends upward. The clamping cone sleeve has an inner cone opening with a diameter that gradually increases from top to bottom. The outer surface of the clamping sleeve is provided with an outer cone surface that matches the inner cone opening. The clamping cone sleeve has a first moving position that forces the clamping sleeve to retract radially inward and a second moving position that disengages from the clamping sleeve and expands radially outward.

[0009] Preferably, a reset chamber is fixedly provided in the receiving cavity above the clamping cone sleeve. The reset chamber has a drive hole that penetrates its upper and lower surfaces. Guide slots are provided on both sides of the drive hole. A reset spring is provided in the guide slot. The pressing rod passes through the drive hole and has a guide block on it that corresponds to the position of the guide slot. One end of the reset spring abuts against the lower surface of the guide block, and the other end abuts against the bottom surface of the guide slot.

[0010] Preferably, the battery holder has a cavity for accommodating the control board, and the extension has a docking hole communicating with the cavity. The cavity has a second vibration damping mechanism, which includes a pressure plate, a compression spring, and several limiting seats. The pressure plate is movably disposed below the docking hole by the compression spring, and the compression spring applies an upward force to the pressure plate. The several limiting seats are installed below the pressure plate and correspond to the upper part of the control board.

[0011] Preferably, a push rod is vertically provided on the clamping cone sleeve, one end of which extends downward and protrudes from the lower end of the clamping cone sleeve. The push rod can pass through the docking hole and extend into the cavity to drive the pressure plate to move downward against the bias force of the clamping spring, so that the limiting seat below it presses against the control plate.

[0012] Preferably, the end of the pressing rod away from the clamping cone sleeve is provided with a guide cone surface, and the end of the driving rod is provided with a driving head. The driving head is formed with a driving cone surface that cooperates with the guide cone surface. The driving head moves synchronously with the operating switch and has a first stroke corresponding to turning on the power tool and a second stroke corresponding to turning off the power tool. When the power tool is not started, the operating switch is in the second stroke, the driving head is away from the pressing rod, and the pressing rod is in a raised state. When the power tool is started, the operating switch is in the first stroke, and the driving head presses the pressing rod to make it fall.

[0013] Preferably, the extension is a hollow cylinder integrally injection molded with the battery holder, and its outer cylindrical surface is a mating surface held by the elastic damping layer. The elastic damping layer is made of rubber and is bonded to the inner hole of the clamping sleeve by adhesive fixation. When the clamping sleeve is in the relaxed state, the inner diameter of the elastic damping layer is larger than the outer diameter of the extension, forming a clearance fit.

[0014] Preferably, the side of the limiting seat facing the control panel is provided with a silicone cushioning pad.

[0015] Preferably, the grip and the battery holder are detachably connected by a fastening assembly.

[0016] Compared with the prior art, the present invention has the following advantages through the above technical solution: First, by setting a radially retractable clamping sleeve in the receiving cavity at the bottom of the grip and setting an elastic damping layer on its inner surface, wherein the clamping sleeve has at least one axial slot to allow it to retract radially inward, and a drive seat is set above the clamping sleeve to control the retraction or expansion of the clamping sleeve. When the power tool is started, the drive seat forces the clamping sleeve to hug the extension, thereby dynamically strengthening the connection between the grip and the battery holder. At the same time, the elastic damping layer absorbs and blocks most of the vibration transmitted from the grip, reducing the vibration of the battery holder. Second, by linking the drive assembly with the operation switch of the power tool, the pressing stroke of the switch can be converted into a locking driving force of the drive seat along the axial direction of the receiving cavity. This achieves an automatic synchronous response where the clamping sleeve hugs the extension to complete the locking action as soon as the power tool is turned on, and the clamping sleeve releases the extension as soon as the power tool is turned off, without requiring additional operation from the user. This provides a reliable vibration reduction effect while ensuring the convenience of plugging and unplugging assembly.

[0017] Furthermore, a second vibration damping mechanism is installed within the battery holder cavity. Through the linkage of the push rod, pressure plate, and limit seat, the limit seat presses down on the control board from above as the tool starts and clamps the extension, preventing the control board from moving or resonating within the battery holder cavity. This forms a dual vibration damping protection structure, reducing the risk of control board vibration failure and significantly extending the reliable service life of the tool. In summary, this invention provides a split-type power tool that automatically locks upon starting and stopping of the power tool while providing dual vibration damping protection, thus solving the technical problem of high failure rate of the control board within the battery holder due to vibration in existing split-type power tools.

[0018] In summary, by linking the drive unit's movement with the operating switch, the clamping sleeve retracts to grip the extension only when the tool is started, simultaneously driving the second damping mechanism to press against the control plate. This achieves a control mode where locking and damping are activated only during operation and fully released when the tool is stopped. This control mode allows the pre-existing gap between the elastic damping layer and the extension to be maintained when the power tool is stopped, enabling easy installation of the battery holder without contact with the elastic damping layer. This avoids wear on the damping layer during assembly, balancing vibration damping effectiveness and ease of disassembly / reassembly, and solving the technical problem of existing split-type power tools where vibration damping effectiveness and ease of disassembly / reassembly cannot be simultaneously achieved. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the internal cross-sectional structure of the present invention; Figure 3 This is a schematic diagram of the internal structure of the battery holder of the present invention; Figure 4 This is a schematic diagram of the gripping part and the receiving cavity in the inserted state of the present invention; Figure 5 This is a schematic diagram of the drive seat and clamping sleeve in their separated state according to the present invention; Figure 6 This is a bottom view of the structure of the drive seat and clamping sleeve in the separated state of the present invention; Figure 7 This is a cross-sectional view of the drive seat and clamping sleeve in their separated state according to the present invention; Figure 8 For the present invention Figure 2 A partially enlarged structural diagram; The invention reference information is as follows: 1. Tool body; 2. Battery holder; 3. Grip part; 4. Receiving cavity; 5. Extension part; 6. Clamping sleeve; 7. Drive seat; 8. Drive assembly; 9. Return spring; 10. Control board; 11. Pressure plate; 12. Compression spring; 13. Limit seat; 14. Return chamber; 101. Operating switch; 501. Docking hole; 601. Elastic damping layer; 701. Clamping cone sleeve; 702. Down pressure rod; 703. Inner cone opening; 704. Guide block; 705. Top rod; 706. Guide cone surface; 801. Linkage part; 802. Drive rod; 803. Drive head; The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0021] The following will refer to the appendices in the embodiments of the present invention. Figure 1-8 The technical solutions in the embodiments of the present invention are clearly and completely described herein. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0022] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0023] Furthermore, the use of terms such as "first" and "second" in this invention is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0024] like Figure 1-2As shown: A split-type power tool, in this embodiment a handheld electric drill, the power tool includes a tool body 1 and a battery holder 2 detachably connected to the lower part of the tool body 1. The tool body 1 integrates power output components such as a motor, gearbox, and drill chuck. The rear part forms a grip 3 for the operator to hold with one hand. The bottom of the grip 3 is concave upward to form a generally cylindrical cavity 4 for receiving the battery holder 2. The battery holder 2 has a battery pack under its housing to provide power to the power tool. The top of the battery holder 2 protrudes upward to form an extension 5. The shape and size of the extension 5 match the cavity 4 and can be inserted into the cavity 4 axially to achieve a plug-in fit. In order to ensure reliable fixation, the grip 3 and the battery holder 2 can be pre-locked by fastening components such as screws, clips, or screws.

[0025] like Figure 2-4 As shown: A first vibration damping mechanism is provided inside the receiving cavity 4. The first vibration damping mechanism consists of a clamping sleeve 6 fixedly disposed at the edge of the opening of the receiving cavity 4, and a drive seat 7 movably disposed above the clamping sleeve 6 and capable of sliding axially. The clamping sleeve 6 is a cylindrical sleeve structure with at least one axial groove opened on it along the axial direction, giving it the elastic deformation capability of radially contracting inward and expanding outward. An elastic damping layer 601 is fixedly attached to its inner wall, and the elastic damping layer 601 is made of rubber or polyurethane material. The drive seat 7 is mechanically linked to the operating switch 101 on the tool body 1 through a drive assembly 8, which can convert the switch action into its own axial movement, thereby actively controlling the radial contraction or relaxation of the clamping sleeve 6. When the clamping sleeve 6 contracts radially inward, the elastic damping layer 601 on its inner wall will radially hug the outer circumferential surface of the extension 5, forming an interference fit; when the clamping sleeve 6 relaxes, the inner wall surface of the elastic damping layer 601 disengages from the outer wall surface of the extension 5 and forms a gap.

[0026] The first vibration damping mechanism uses a conical surface fit to force the clamping sleeve 6 to contract radially, so that the elastic damping layer 601 evenly clamps the outer cylindrical surface of the extension 5. This not only eliminates the connection gap, but also converts the radial and axial vibration energy transmitted from the tool body 1 through the elastic damping layer to weaken the vibration transmitted to the battery holder.

[0027] With the above structure, at the moment the power tool is started, the battery holder 2 and the grip 3, which originally had a gap, are dynamically locked into a whole, which improves the connection strength and tightness. This solves the defect that vibration will be amplified by collision through the gap. At the same time, the elastic damping layer 601, as a vibration damping medium, can effectively absorb and dissipate the high-frequency vibration energy transmitted from the motor and drill bit to the handle, thereby suppressing the vibration from propagating into the battery holder 2 and protecting its internal precision components.

[0028] like Figure 2 and Figure 8 As shown: The tool body 1 is equipped with an operating switch 101, which is a trigger switch with a self-resetting function. It serves as the main control terminal for starting, stopping, and adjusting the speed of the electric drill. The drive assembly 8 consists of a linkage part 801 and a drive rod 802. The linkage part 801 is a plate-shaped structure, one end of which is fixedly connected to the inner slide of the operating switch 101 by screws or clips to ensure that the two can achieve synchronous linear movement. The drive rod 802 is vertically arranged on the movement path of the linkage part 801, one end of which is connected to one side of the linkage part 801, and the other end points towards the drive seat 7. When the operator pulls or releases the operating switch 101, the linear displacement of the linkage part 801 is converted into an axial component force by the drive rod 802 through a specific inclined or curved surface, thereby driving the drive seat 7 to move downward along the axis of the receiving cavity 4. Specifically, the linkage 801 slides horizontally under the action of the operating switch 101, and the drive rod 802 is rotatably or slidably disposed within the grip. During horizontal movement, the drive cone surface on the drive rod creates a wedge-shaped compression with the guide cone surface at the top of the pressure rod, thereby converting the horizontal movement into the vertical downward movement of the pressure rod. With this structure, the user does not need any additional manual locking operation during operation. While ensuring the battery holder 2 is easily removable, it also provides high vibration damping performance during tool operation, improving the user experience and extending the tool's lifespan.

[0029] like Figure 5-7 As shown: The drive seat 7 includes a clamping cone sleeve 701 located at the lower part and a downward pressure rod 702 vertically connected to the upper part of the clamping cone sleeve 701. The clamping cone sleeve 701 is hollow inside, and its lower end forms an inner cone opening 703 that gradually narrows from the outside to the inside. The cone surface of this inner cone opening serves as a driving inclined surface. Correspondingly, the outer surface of the clamping sleeve 6 driven by it is machined with an outer cone surface that perfectly matches the taper of the inner cone opening 703. The clamping cone sleeve 701 has two extreme positions on its sliding path: when it moves downward to the lowest point, it is in the first moving position. At this time, the conical surface of the inner cone 703 is tightly fitted with the outer cone surface of the clamping sleeve 6, generating a huge radial inward component force, forcing the clamping sleeve 6 to overcome its own elastic stiffness and contract radially inward, thereby clamping the extension 5; when it moves upward to the highest point, it is in the second moving position. At this time, the inner cone 703 is completely disengaged from the outer cone surface of the clamping sleeve 6 in the axial direction, and the clamping sleeve 6 expands radially outward to the initial state under the action of its own material elasticity, releasing the extension 5. This conical surface fit design converts a small axial driving force into a large radial clamping force, achieving a strong and uniform clamping of the battery holder extension 5. It can also automatically correct deviations to ensure coaxiality after locking and avoid generating additional eccentric vibrations.

[0030] like Figure 2As shown: Above the clamping cone sleeve 701, a reset chamber 14 is fixedly installed by screws or welding. The reset chamber 14 is a shell-shaped structure with an opening at one end. Its top wall has a drive hole that runs through its upper and lower surfaces, allowing the pressing rod 702 to pass through. On both sides of the drive hole, vertical guide slots are symmetrically formed on the inner wall of the reset chamber 14, which can be used as guide rails. In the middle of the pressing rod 702, a guide block 704 is integrally formed or fixedly installed at the position corresponding to the guide slot. The two wings of the guide block 704 extend into the guide slots on both sides and can slide up and down along the slots. A reset spring 9 is vertically installed inside each guide slot. The top end of the reset spring 9 abuts against the lower surface of the guide block 704, and the bottom end abuts against the bottom surface of the guide slot. When the operating switch 101 is released and the driving force of the drive rod 802 is removed, the elastic potential energy stored in the compressed return spring 9 will be released immediately, pushing the guide block 704 upward. This will cause the entire drive seat 7, i.e., the pressing rod 702 and the clamping cone sleeve 701, to rise quickly and smoothly from the first moving position to the second moving position, ensuring that the clamping sleeve 6 can quickly and completely release the extension 5. This ensures that the physical lock can be released instantly upon stopping the machine, making it easier for the user to remove the battery holder 2 at any time.

[0031] like Figure 3-4 As shown: A second vibration damping mechanism is installed inside the battery holder 2. The battery holder 2's housing is divided into an independent chamber by a partition, specifically for accommodating and housing the control board 10, i.e., the circuit board containing various electronic components. A through-hole 501 is opened in the center of the extension 5. The upper opening of the through-hole 501 faces the top rod 705, while the lower opening connects to the chamber of the control board 10 below. A pressure plate 11 is movably installed on the top wall of the chamber, directly opposite the through-hole 501. The four corners of the pressure plate 11 are suspended by four compression springs 12, allowing it to float elastically in the vertical direction. Multiple limiting seats 13 are bolted to the lower surface of the pressure plate 11. The spatial positions of these limiting seats 13 correspond one-to-one with the areas of the upper surface of the control board 10 that need to be pressed, typically the edges of the board without components.

[0032] The above method constitutes a dual vibration damping structure, with the second vibration damping mechanism providing internal pressure protection for the control board 10. Specifically, when the tool is not activated, the second vibration damping mechanism is in a suspended, standby state, applying no force to the control board 10, facilitating assembly. When the tool is activated and locked, it activates synchronously, providing flexible and multi-point pressure directly from the inside to eliminate the possibility of the control board 10 colliding with the outer casing due to inertia or generating high-frequency micro-amplitude resonance. This reduces the failure rate of electronic components on the control board 10, such as poor soldering or detachment.

[0033] like Figure 3-4As shown: A push rod 705 is vertically downwardly mounted on the clamping cone sleeve 701, and the axis of the push rod 705 is perfectly aligned with the axis of the mating hole 501 on the extension 5. The end of the push rod 705 extends downward and protrudes from the lowest end face of the clamping cone sleeve 701, forming a movable contact. When the drive seat 7 moves downward under the action of the drive assembly 8, and the clamping cone sleeve 701 enters the first moving position to perform locking, the end of the push rod 705 passes through the mating hole 501 and penetrates into the cavity of the internal control plate 10 of the battery holder 2, and touches the upper surface of the pressure plate 11. As the clamping cone sleeve 701 continues to move downward into place, the push rod 705 forces the pressure plate 11 to move downward against the resistance of the compression spring 12, thereby driving all the limit seats 13 installed under the pressure plate 11 to simultaneously and evenly press against the upper surface of the control plate 10. When the drive seat 7 is reset, the push rod 705 moves upward and is removed, and the pressure plate 11 and the limit seat 13 automatically release the control plate 10 under the elastic restoring force of the compression spring 12.

[0034] like Figure 8 As shown: The top end of the pressure rod 702, i.e., the end furthest from the clamping cone sleeve 701, is machined into a guide cone surface 706. Correspondingly, a drive head 803 is provided at the end of the drive rod 802. The bottom of the drive head 803 has a drive cone surface that mates with the guide cone surface 706. The two cone surfaces remain in contact during operation. The drive head 803 is fixedly connected to the operating switch 101 via a linkage 801 and moves synchronously with it in the horizontal direction. Its stroke corresponds to the two functional strokes of the operating switch 101: the first stroke corresponds to the power tool being on, at which time the drive head 803 moves horizontally to its foremost position, and its drive cone surface moves above the pressure rod 702 through the guide cone surface 706, forcing the pressure rod 702 to overcome the reaction force of the return spring 9 and switch from the raised state to the lowered state, completing the locking. The second stroke corresponds to the off state of the power tool. At this time, the operating switch 101 automatically rebounds, and the drive head 803 moves backward synchronously in the horizontal direction, completely disengaging from the contact with the lower lever 702, releasing the constraint on the lower lever 702, and allowing the lower lever 702 to return to the raised state under the action of the return spring 9.

[0035] Specifically, when the drill is not started, the operating switch 101 is in its second stroke. The linkage 801 drives the drive head 803 away from the pressure rod 702. The pressure rod 702 is in a raised state under the action of the return spring 9, and the drive seat 7 is positioned above. The clamping sleeve 6 is open, and the elastic damping layer 601 maintains a gap with the extension 5. At this time, the battery holder 2 can be easily removed or installed, and the elastic damping layer 601 will not be scratched.

[0036] When the operator presses the operating switch 101, the switch enters the first stroke, and the motor starts running. Simultaneously, the linkage 801 pushes the drive rod 802 forward, and the drive cone surface of the drive head 803 contacts and applies pressure to the guide cone surface 706 at the top of the pressure rod 702, pushing the pressure rod 702 vertically downward. As a result, the drive seat 7 moves downward as a whole, and the inner cone opening 703 presses against the outer cone surface of the clamping sleeve 6, forcing the clamping sleeve 6 to contract radially. The elastic damping layer 601 tightly grips the outer cylindrical surface of the extension 5. The first vibration damping mechanism intervenes, and the vibration generated by the tool body 1 must pass through the high-damping rubber layer before being transmitted to the battery holder 2, thus significantly absorbing and dissipating the vibration energy.

[0037] The extension 5 is preferably a hollow cylinder integrally injection molded with the outer shell of the battery holder 2, and the outer cylindrical surface of the extension 5 serves as the mating surface held by the elastic damping layer 601. The elastic damping layer 601 is specifically made of wear-resistant and oil-resistant nitrile rubber, and is firmly bonded to the inner wall of the clamping sleeve 6 through an adhesive process to prevent the possibility of delamination or misalignment under repeated high-frequency friction.

[0038] A silicone buffer pad is attached to the side of the limiting seat 13 facing the control board 10, i.e., the interface that directly contacts the electronic components. When the limiting seat 13 is pressed against the control board 10 under the force of the compression spring 12, the silicone buffer pad first contacts the component surface and undergoes adaptive deformation, dispersing and buffering the rigid point pressure or surface pressure, forming a flexible and non-destructive holding. This structure can effectively prevent the limiting seat 13 made of metal or hard plastic from directly impacting or scratching the precision components and solder joints on the control board 10. At the same time, while providing sufficient constraint reaction force to prevent the board from moving, it also plays an auxiliary role in absorbing minor vibrations, ensuring electrical safety and structural integrity.

[0039] The working process of this invention is as follows: First, during assembly, align the extension 5 of the battery holder 2 with the receiving cavity 4 of the grip 3 and push it upwards axially. When fully inserted, the grip 3 and battery holder 2 are detachably installed by locking with screws or clips. At this time, the entire power tool is in a standby state, and the operating switch 101 is in the second stroke position, i.e., the off position, under the action of its internal self-resetting torsion spring. Correspondingly, the drive head 803 of the drive assembly 8 is at its farthest point in the horizontal direction, completely away from the lowering rod 702. The drive seat 7 is stably maintained in the second moving position at its upper stop point under the push of the return spring 9. At this time, the clamping cone sleeve 701 is completely disengaged axially from the clamping sleeve 6, and the clamping sleeve 6 is in a relaxed state of radial outward expansion. There is a designed gap between the elastic damping layer 601 on its inner wall and the outer cylindrical surface of the extension 5, forming a clearance fit. In this state, the extension 5 will not contact the elastic damping layer 601, which facilitates assembly and will not damage the elastic damping layer 601. Simultaneously, the top rod 705, which moves synchronously with the clamping cone sleeve 701, also has its end suspended directly above the docking hole 501 on the extension 5, without penetrating into the cavity. In the second vibration damping mechanism inside the battery holder 2, the pressure plate 11 is pushed upward to its highest position under the pre-pressure of four compression springs 12. All the limit seats 13 and silicone buffer pads installed below it are higher than the upper surface of the control plate 10 and do not contact the control plate 10 at all, without applying any form of pre-stress or constraint to it, thus ensuring the free state and assembly convenience of the control plate 10 in the non-working state. When a user needs to start power tools to perform tasks such as drilling or tightening screws, such as Figure 4The user grips the holding part 3 with one hand and presses the operating switch 101 with their index finger. The operating switch 101 overcomes its internal spring force and moves horizontally from the second stroke to the first stroke. The drive rod 802 and drive head 803, fixed to the operating switch 101 via the linkage part 801, move horizontally synchronously accordingly. The drive cone surface at the front end of the drive head 803 begins to contact and slide above the guide cone surface 706 at the top of the pressing rod 702. Under the action of the inclined plane, the horizontal movement of the drive head 803 generates a vertically downward component force, which is converted into a locking drive force that drives the pressing rod 702 downward. The pressing rod 702 begins to move vertically downward and compresses the reset spring 9 in the reset chamber 14 through the guide block 704, storing energy in it. The pressing rod 702 drives the clamping cone sleeve 701, fixed to it, to move downward synchronously, switching from its second moving position to its first moving position. During the downward movement, the inner conical opening 703 of the clamping cone sleeve 701 begins to engage with the outer conical surface of the clamping sleeve 6. As the clamping cone sleeve 701 continues to move downward, its inner conical opening 703 forces the elastic clamping sleeve 6 to contract radially inward and uniformly. Finally, the elastic damping layer 601 on the inner wall of the clamping sleeve 6 clamps onto the outer cylindrical surface of the extension 5, instantly locking the battery holder 2 and the gripping part 3 into a single unit. At this point, vibrations generated during operation that would normally be amplified through gaps must be transmitted to the battery holder 2 via the elastic damping layer 601. The elastic damping layer 601, acting as the first layer of vibration damping, absorbs the vast majority of high-frequency vibrations.

[0040] Simultaneously, at the same instant that the clamping cone sleeve 701 moves downward to perform external locking, the top rod 705, vertically fixed to it, also moves downward in sync. Its protruding end precisely passes through the docking hole 501 at the top of the extension 5 and extends into the cavity of the control plate 10 on the upper layer of the battery holder 2. The end face of the top rod 705 first contacts the upper surface of the pressure plate 11 and overcomes the supporting force of the compression spring 12, driving the pressure plate 11 to move smoothly downward. The downward movement of the pressure plate 11 causes multiple limit seats 13 and their bottom silicone buffer pads to descend together until the silicone buffer pads adhere and press against the predetermined area of ​​the control plate 10 with a preset compliant holding force determined by the stiffness of the compression spring 12. This action constitutes a second line of vibration damping, firmly and flexibly holding the control plate 10 in its mounting position, preventing it from shaking or colliding with the outer casing due to inertia.

[0041] When drilling is complete and the tool needs to be turned off, the user simply needs to release the pressure on the operation switch 101. Figure 2The operating switch 101, under the action of its internal return spring assembly, automatically springs back horizontally from the first stroke to the initial position of the second stroke. The drive rod 802 and drive head 803, fixed to the operating switch 101, also move horizontally backward in perfect synchronization. The drive cone surface of the drive head 803 quickly slides away from the lower pressure rod 702, releasing the vertical pressure on the lower pressure rod 702. At this time, the external force applied to the drive seat 7 disappears. Inside the reset chamber 14, the return spring 9, which had been compressed and stored elastic potential energy, immediately releases its elastic force. This upward elastic force acts on the lower surface of the guide block 704, thereby pushing the lower pressure rod 702 and the entire drive seat 7 connected to it to rise upward, instantly resetting it from the first moving position to the second moving position. The rise of the clamping cone sleeve 701 causes its inner cone opening 703 to quickly detach axially from the constraint on the outer cone surface of the clamping sleeve 6. Freed from external pressure, the clamping sleeve 6, by its own characteristics, expands radially outward, returning to its original size. This causes the inner wall surface of the elastic damping layer 601 to quickly separate from the outer cylindrical surface of the extension 5, re-establishing a clearance fit for free insertion and removal, and releasing the external mechanical locking of the battery holder 2.

[0042] Simultaneously, the push rod 705, fixed to the clamping cone sleeve 701, also rises upwards, its lower end face quickly retracting from the upper surface of the pressure plate 11, releasing the forced displacement of the pressure plate 11. The compressed clamping spring 12 then releases its stored energy, pushing the pressure plate 11 upwards to return to its high position. As the pressure plate 11 rises, all the limiting seats 13 fixed below it and their silicone buffer pads also immediately move upwards and completely disengage from the control plate 10, thus completely releasing the internal pressure on the control plate 10 and restoring the control plate 10 to its free state. At this point, the entire tool simultaneously releases the external locking of the battery holder 2 and the internal pressure on the control plate 10 the instant it stops, completely returning to its initial standby state. At this point, if the user wants to replace the battery holder, they only need to remove the screws or clips between the battery holder 2 and the grip 3 to remove the battery holder 2 from the receiving cavity. During this process, the extension 5 of the battery holder 2 will not come into contact with the elastic damping layer 601, which facilitates assembly and avoids wear on the damping layer during the assembly process.

[0043] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A split-type power tool, comprising a tool body (1) and a battery holder (2), wherein the tool body (1) has a grip (3), the bottom of the grip (3) is provided with a receiving cavity (4), and the top of the battery holder (2) has an extension (5) capable of engaging with the receiving cavity (4), characterized in that: The receiving cavity (4) is provided with a first vibration damping mechanism. The first vibration damping mechanism includes a clamping sleeve (6) fixed at the opening of the receiving cavity (4) and a drive seat (7) movably disposed above the clamping sleeve (6). An elastic damping layer (601) is provided on the inner wall of the clamping sleeve (6). The drive seat (7) can control the clamping sleeve (6) to retract radially inward through a drive assembly (8), so that its elastic damping layer (601) clamps the extension (5).

2. A split-type power tool according to claim 1, characterized in that: The tool body (1) is provided with an operation switch (101). The drive assembly (8) includes a linkage part (801) and a drive rod (802). The linkage part (801) is fixedly connected to the operation switch (101) and can move synchronously with it. The drive rod (802) is arranged on one side of the linkage part (801) and can drive the drive seat (7) to move, so as to convert the pressing stroke of the operation switch (101) into a locking driving force that drives the drive seat (7) to move axially along the receiving cavity (4).

3. A split-type power tool according to claim 2, characterized in that: The drive seat (7) includes a clamping cone sleeve (701) and a pressing rod (702). The pressing rod (702) is fixedly connected to the upper end of the clamping cone sleeve (701) and extends upward. The clamping cone sleeve (701) has an inner cone opening (703). The diameter of the inner cone opening (703) gradually increases from top to bottom. The outer surface of the clamping sleeve (6) is provided with an outer cone surface that matches the inner cone opening (703). The clamping cone sleeve (701) has a first moving position that forces the clamping sleeve (6) to retract radially inward, and a second moving position that disengages from the clamping sleeve (6) and expands radially outward.

4. A split-type power tool according to claim 3, characterized in that: A reset chamber (14) is fixedly provided in the receiving cavity (4) above the clamping cone sleeve (701). The reset chamber (14) has a drive hole that passes through its upper and lower surfaces. Guide slots are provided on both sides of the drive hole. A reset spring (9) is provided in the guide slot. The pressing rod (702) passes through the drive hole and has a guide block (704) on it that corresponds to the position of the guide slot. One end of the reset spring (9) abuts against the lower surface of the guide block (704), and the other end abuts against the bottom surface of the guide slot.

5. A split-type power tool according to claim 3, characterized in that: The battery holder (2) has a cavity for accommodating the control board (10). The extension (5) has a docking hole (501) communicating with the cavity. The cavity has a second vibration damping mechanism. The second vibration damping mechanism includes a pressure plate (11), a compression spring (12), and several limiting seats (13). The pressure plate (11) is movably disposed below the docking hole (501) by the compression spring (12). The compression spring (12) applies an upward force to the pressure plate (11). Several limiting seats (13) are installed below the pressure plate (11) and above the control board (10).

6. A split-type power tool according to claim 5, characterized in that: A top rod (705) is vertically provided on the clamping cone sleeve (701). One end of the top rod (705) extends downward and protrudes from the lower end of the clamping cone sleeve (701). The top rod (705) can pass through the docking hole (501) and extend into the cavity to drive the pressure plate (11) to move downward against the bias force of the pressure spring (12), so that the limiting seat (13) below it presses against the control plate (10).

7. A split-type power tool according to claim 3, characterized in that: The end of the pressing rod (702) away from the clamping cone sleeve (701) is provided with a guide cone surface (706), and the end of the driving rod (802) is provided with a driving head (803). The driving head (803) has a driving cone surface that cooperates with the guide cone surface (706). The driving head (803) moves synchronously with the operating switch (101) and has a first stroke corresponding to the power tool being turned on and a second stroke corresponding to the power tool being turned off. When the power tool is not started, the operating switch (101) is in the second stroke, the driving head (803) is away from the pressing rod (702), and the pressing rod (702) is in a raised state. When the power tool is started, the operating switch (101) is in the first stroke, and the driving head (803) presses the pressing rod (702) to make it fall.

8. A split-type power tool according to claim 1, characterized in that: The extension (5) is a hollow cylinder integrally injection molded with the battery holder (2). Its outer cylindrical surface is a mating surface held by the elastic damping layer (601). The elastic damping layer (601) is made of rubber and is bonded to the inner hole of the clamping sleeve (6) by adhesive fixing. When the clamping sleeve (6) is in a relaxed state, the inner diameter of the elastic damping layer (601) is larger than the outer diameter of the extension (5), forming a clearance fit.

9. A split-type power tool according to claim 5, characterized in that: The limiting seat (13) is provided with a silicone cushioning pad on the side facing the control panel (10).

10. A split-type power tool according to claim 1, characterized in that: The grip (3) and the battery holder (2) are detachably connected by a fastening assembly.

Images