A multi-damping direct current electric hammer with a motor and a cylinder arranged vertically

Abstract

The utility model relates to a direct current electric hammer related technical field especially, more shock attenuation direct current electric hammer of motor and cylinder vertical placement, including casing, handle, direct current brushless motor, controller, cylinder subassembly, battery pack and damping mechanism, direct current brushless motor places in casing inside with cylinder subassembly, and direct current brushless motor and cylinder subassembly axis vertical. This motor and cylinder vertical placement's more shock attenuation direct current electric hammer, four shock attenuation mechanisms effectively alleviate the vibration of whole machine work, reduce the harm to user's wrist, arm, through the setting of main shock attenuation spring, auxiliary shock attenuation ring and rubber sealing ring etc. parts, further improved the shock attenuation effect, reduced the influence of cylinder subassembly body vibration to whole machine, set up four shock attenuation devices to protect the important structural member inside machine, including battery pack plug pin, gyroscope PCB subassembly, controller electronic element and battery pack subassembly, improved the life and reliability of whole machine.

Description

Technical Field

[0001] This utility model relates to the technical field of DC electric hammers, and in particular to a multi-vibration-damping DC electric hammer with the motor and cylinder placed vertically. Background Technology

[0002] A hammer drill is an electrically powered rotary hammer drill with a safety clutch and a pneumatic hammering mechanism. It utilizes the principle of piston motion, compressing gas to impact the drill bit. It requires minimal manual force and can drill holes 6-100mm in hard materials such as concrete, brick, and stone. Hammer drills are highly efficient at drilling in these materials, but they cannot drill in metal. DC hammer drills are powered by a DC power supply (usually a lithium battery pack) and possess both rotary drilling and axial hammering functions. Powered by a lithium battery pack, they overcome the limitations of AC power, allowing for free movement. Therefore, a multi-vibration-damping DC hammer drill with a vertically positioned motor and cylinder is particularly needed.

[0003] However, in existing DC hammer drills with multiple shock absorption systems where the motor and cylinder are placed vertically, most DC hammer drills will vibrate at high frequencies during operation. Without a shock absorption system, users may experience physical discomfort or occupational diseases. In traditional lithium-ion lightweight hammer drills, the motor is positioned parallel to the cylinder axis, and the handle and housing are integrated, which does not provide shock absorption for the handle. Utility Model Content

[0004] The purpose of this utility model is to provide a multi-vibration-damping DC hammer with the motor and cylinder placed vertically, in order to solve the problem mentioned in the background art. In the process of use, most of the existing multi-vibration-damping DC hammers with the motor and cylinder placed vertically will have high-frequency vibration. Without a vibration damping system, users will feel physical discomfort or cause occupational diseases. In traditional lithium battery lightweight hammers, the motor is installed in a position parallel to the cylinder axis, and the handle and the housing are integrated, which cannot achieve the problem of handle vibration damping in terms of structure.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a multi-vibration-damping DC electric hammer with the motor and cylinder placed vertically, comprising a housing, a handle, a brushless DC motor, a controller, a cylinder assembly, a battery pack, and a vibration-damping mechanism. The handle is hinged to one end of the housing. The brushless DC motor is installed inside the housing. The controller is installed at the bottom inside the housing. The cylinder assembly is installed at the top inside the housing. The battery pack is connected to the bottom of the handle. The brushless DC motor and the cylinder assembly are placed inside the housing, and the axes of the brushless DC motor and the cylinder assembly are perpendicular.

[0006] Preferably, the brushless DC motor and the cylinder assembly are connected by a bevel gear transmission to ensure that the axis of the brushless DC motor is perpendicular to the cylinder.

[0007] Preferably, the handle is separate from the housing, and the handle and the housing are hinged together. A main shock-absorbing spring and two auxiliary shock-absorbing rings are provided at the connection point between the handle and the housing.

[0008] Preferably, the aluminum bracket of the cylinder assembly is equipped with a rubber sealing ring to seal against oil and reduce vibration of the cylinder assembly body during operation.

[0009] Preferably, the battery pack pins on the handle are provided with a dual-spring shock absorption structure to reduce the impact of vibration on the battery pack pins.

[0010] Preferably, the gyroscope placement position on the handle is provided with a rubber column shock-absorbing structure to protect the gyroscope PCB assembly.

[0011] Preferably, the controller on the housing is provided with a dual shock-absorbing structure to protect the controller's electronic components, and the battery pack on the handle is provided with shock-absorbing rubber pillars to protect the battery pack assembly.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: This multi-vibration-damping DC electric hammer, with the motor and cylinder placed vertically, features a triple damping mechanism on the handle and a single damping mechanism on the body, totaling four damping mechanisms. This effectively reduces vibration during operation, minimizing injury to the user's wrists and arms. The inclusion of a main damping spring, auxiliary damping ring, and rubber sealing ring further enhances the damping effect, reducing the impact of cylinder assembly vibration on the entire machine. The design of the DC brushless motor perpendicular to the cylinder axis allows for better... Compactly housed within the casing, optimizing space layout, the handle is separate from the casing and connected by a hinge, which not only facilitates operation but also provides a structural basis for effective shock absorption. A quadruple shock absorption system is installed to protect important internal structural components, including the battery pack pins, gyroscope PCB assembly, controller electronic components, and battery pack assembly, improving the overall lifespan and reliability of the machine. Powered by a DC brushless motor and battery pack, the motor rotates at high speed under the influence of a magnetic field, driving the swing arm bearing and cylinder assembly to achieve multiple functions such as hammer, hammer drill, and single drill, meeting different work requirements. Attached Figure Description

[0013] Figure 1 This is a side view of the appearance structure of this utility model; Figure 2 This is an exploded structural diagram of the present invention; Figure 3 This is a schematic diagram of the interaction between the handle and the battery pack of this utility model; Figure 4 This is a schematic diagram of the cooperative structure of the main damping spring and the auxiliary damping ring of this utility model; Figure 5This is a schematic diagram of the interaction between the housing and the controller of this utility model.

[0014] In the diagram: 1. Housing; 2. Handle; 3. DC brushless motor; 4. Controller; 5. Cylinder assembly; 6. Battery pack; 7. Main damping spring; 8. Auxiliary damping ring; 9. Rubber sealing ring; 10. Double spring damping structure; 11. Rubber column damping structure; 12. Double damping structure; 13. Damping rubber column. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Please see Figure 1-5 This utility model provides a technical solution: a multi-vibration-damping DC electric hammer with the motor and cylinder placed vertically, including a housing 1, a handle 2, a DC brushless motor 3, a controller 4, a cylinder assembly 5, a battery pack 6, and a vibration damping mechanism. The handle 2 is hinged to one end of the housing 1. The DC brushless motor 3 is installed inside the housing 1. The controller 4 is installed at the bottom inside the housing 1. The cylinder assembly 5 is installed at the top inside the housing 1. The battery pack 6 is connected to the bottom of the handle 2. The DC brushless motor 3 and the cylinder assembly 5 are placed inside the housing 1, and the axes of the DC brushless motor 3 and the cylinder assembly 5 are perpendicular.

[0017] The DC brushless motor 3 and the cylinder assembly 5 are connected by bevel gear transmission to make the axis of the DC brushless motor 3 perpendicular to the cylinder 5.

[0018] The handle 2 is separate from the housing 1 and is hinged to the housing 1. A main damping spring 7 and two auxiliary damping rings 8 are installed at the connection between the handle 2 and the housing 1. The main damping spring 7, as the main damping element, has great elasticity and restoring force, which can absorb and reduce most of the working vibration. The two auxiliary damping rings 8 serve as a supplement, further refining the damping effect and ensuring all-round reduction of vibration. In addition to protecting the user, it also protects the internal structure of the electric hammer. The damping system composed of the main damping spring 7 and the two auxiliary damping rings 8 can reduce the impact of vibration on the internal structure, thereby extending the service life of the whole machine.

[0019] A rubber sealing ring 9 is installed on the aluminum bracket of cylinder assembly 5 to seal against oil and reduce the vibration of the cylinder assembly body during operation. It fits tightly against the aluminum bracket interface of cylinder assembly 5 and fills the micro gaps in the metal contact surface through elastic deformation, effectively preventing lubricating oil leakage and external dust intrusion, ensuring the lubrication stability of the piston movement inside the cylinder. Utilizing the high damping characteristics of rubber material, the high-frequency mechanical energy generated by the reciprocating motion of the cylinder piston is converted into heat energy dissipation, reducing the vibration amplitude transmitted to the housing 1. By adjusting the hardness of the rubber, the natural frequency of the system is changed, avoiding resonance caused by superposition with the operating frequency of the DC brushless motor 3, buffering the impact stress between cylinder assembly 5 and aluminum bracket, reducing the risk of metal fatigue cracks, and extending the life of key components.

[0020] A dual-spring shock-absorbing structure 10 is provided at the battery pack 6 pin on the handle 2 to reduce the impact of vibration on the battery pack 6 pin.

[0021] A rubber column damping structure 11 is provided at the gyroscope placement position on the handle 2 to protect the gyroscope PCB assembly. Utilizing the high damping characteristics of rubber, the high-frequency vibration generated by the brushless DC motor 3 is converted into heat energy and dissipated, reducing the acceleration transmitted to the handle 2. It complements the metal spring, with the spring mainly targeting low-frequency vibration and the rubber column specializing in high-frequency filtering, forming a full-band coverage damping system. It is linked with the dual-spring damping structure 10, with the rubber column filtering the high-frequency residual vibration of the brushless DC motor 3 and reducing the dynamic load fluctuation of the dual-spring system. It also complements the rubber sealing ring 9, with the sealing ring blocking the spread of vibration source (cylinder end) and the rubber column reducing the energy of the transmission path.

[0022] The controller 4 on the housing 1 is provided with a double shock-absorbing structure 12 to protect the electronic components of the controller 4, and the battery pack 6 on the handle 2 is provided with shock-absorbing rubber pillars 13 to protect the battery pack 6 assembly.

[0023] Electric hammers generate high-frequency vibrations during operation, and without a shock absorption system, users may experience physical discomfort or occupational diseases. Therefore, this design incorporates a triple shock absorption mechanism on the handle 2 and a single shock absorption mechanism on the body, totaling four shock absorption mechanisms to reduce the impact of vibrations on the user during operation. Additionally, the four-fold shock absorption mechanism on the housing 1 and handle 2 protects critical internal structural components during operation. The DC brushless motor 3 is powered by the battery pack 6 and rotates at high speed under the influence of a magnetic field, driving the swing arm bearing and cylinder assembly 5 to achieve hammer, hammer drill, and single drill functions. Traditional lithium-ion lightweight electric hammers have the motor mounted parallel to the cylinder axis, and the handle 2 is integrated with the housing 1, making it structurally impossible to achieve shock absorption for the handle 2. In this case, the DC brushless motor 3 is perpendicular to the axis of the cylinder assembly 5. The DC brushless motor 3 and the cylinder assembly 5 are placed inside the housing 1. The handle 2 is separate from the housing 1 and is hinged to the housing 1. A main damping spring 7 and two auxiliary damping rings 8 are installed at the connection between the handle 2 and the housing 1 to reduce the vibration generated during machine operation and transmit it to the user's wrist and arm through the handle 2. At the same time, a rubber sealing ring 9 is installed on the aluminum bracket of the cylinder assembly 5 to seal against oil and reduce the vibration of the cylinder assembly 5 body during machine operation and transmit it to the handle 2. In addition, since the vibration during machine operation is relatively large and has a significant impact on the life of important internal structural components, a quadruple damping device is also set in the structure to improve the overall life of the machine. These are: a double-spring shock-absorbing structure 10 at the battery pack 6 pin on the handle 2; a rubber pillar shock-absorbing structure 11 at the gyroscope placement position on the handle 2 to protect the gyroscope PCB assembly; a double shock-absorbing structure 12 on the controller 4 on the housing 1 to protect the electronic components of the controller 4; and a shock-absorbing rubber pillar 13 on the battery pack 6 on the handle 2 to protect the battery pack 6.

[0024] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-vibration-damping DC electric hammer with the motor and cylinder vertically positioned, characterized in that, The device includes a housing (1), a handle (2), a brushless DC motor (3), a controller (4), a cylinder assembly (5), a battery pack (6), and a shock absorption mechanism. The handle (2) is hinged to one end of the housing (1). The brushless DC motor (3) is installed inside the housing (1). The controller (4) is installed at the bottom inside the housing (1). The cylinder assembly (5) is installed at the top inside the housing (1). The battery pack (6) is connected to the bottom of the handle (2). The brushless DC motor (3) and the cylinder assembly (5) are placed inside the housing (1), and the axis of the brushless DC motor (3) is perpendicular to that of the cylinder assembly (5). The aforementioned shock absorption mechanism includes: The handle (2) is provided with a double spring shock absorption structure (10) at the battery pack (6) pin to reduce the impact of vibration on the battery pack (6) pin; The handle (2) is provided with a rubber column shock absorption structure (11) at the gyroscope placement position to protect the gyroscope PCB assembly; The controller (4) on the housing (1) is provided with a double shock-absorbing structure (12) to protect the electronic components of the controller (4), and the battery pack (6) on the handle (2) is provided with a shock-absorbing rubber column (13) to protect the battery pack (6) assembly.

2. The multi-vibration damping DC hammer with the motor and cylinder vertically positioned according to claim 1, characterized in that: The brushless DC motor (3) and the cylinder assembly (5) are connected by bevel gear transmission to ensure that the axis of the brushless DC motor (3) is perpendicular to the cylinder assembly (5).

3. The multi-vibration damping DC electric hammer with the motor and cylinder vertically placed according to claim 1, characterized in that: The handle (2) is separate from the housing (1), and the handle (2) is hinged to the housing (1). A main shock-absorbing spring (7) and two auxiliary shock-absorbing rings (8) are provided at the connection between the handle (2) and the housing (1).

4. The multi-vibration damping DC electric hammer with the motor and cylinder vertically placed according to claim 1, characterized in that: The cylinder assembly (5) is equipped with a rubber sealing ring (9) on its aluminum bracket to seal against oil and reduce vibration of the cylinder assembly body during operation.

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