Multi-stage stroke transmission structure of electric hammer
By designing a multi-stage stroke transmission structure for the electric hammer, the problem of the single working mode of the electric hammer was solved, enabling flexible processing of different types of stone, preventing brittle stone from breaking, and enhancing the applicability of the electric hammer.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG MINGKUN POWER TOOLS CO LTD
- Filing Date
- 2025-07-29
- Publication Date
- 2026-07-24
AI Technical Summary
The existing electric hammer's stroke and rotation structures cannot be driven independently, resulting in a single working mode that is difficult to adapt to the processing needs of different types of stone and easily causes brittle stone to break.
A multi-stage stroke transmission structure for an electric hammer was designed. Through the combination of a drive device, gears, and moving parts, a first-stage, second-stage, and third-stage stroke transmission structure is realized, which respectively drive the drill bit to perform strong impact, rotation, and weak impact, providing eight working modes.
It enables the electric hammer to flexibly process different types of stone, prevents brittle stone from cracking, and can also process hard stone, thus enhancing the applicability of the electric hammer.
Smart Images
Figure CN224544469U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of electric hammer technology, specifically to a multi-stage stroke transmission structure for an electric hammer. Background Technology
[0002] A hammer drill is an electrically powered rotary hammer drill with a safety clutch and a pneumatic hammering mechanism. It works by using a piston to compress gas and impact the drill bit, requiring minimal manual force. It can drill holes 6-100mm deep in hard materials such as concrete, brick, and stone. Hammer drills are highly efficient at drilling in these materials, but they cannot drill holes in metal.
[0003] In existing electric hammers, the internal stroke and rotation structures are driven by a drive device, allowing them to rotate synchronously. Since both the stroke and rotation structures are connected to the output of the drive device, and this connection cannot be disconnected, the working mode of the electric hammer is relatively simple, resulting in a limited range of stone processing methods. Consequently, existing electric hammers are prone to causing brittle stones to crack when processing different types of stone, making processing difficult. Utility Model Content
[0004] The purpose of this invention is to provide a multi-stage stroke transmission structure for electric hammers to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a multi-stage stroke transmission structure for an electric hammer, comprising a driving device: a first gear is provided at the output end of the driving device; a second gear is provided on one side of the first gear; a first movable member is provided at the middle position of the second gear; a shaped member is provided at the top of the first movable member; a piston is movably provided on the other side of the top of the shaped member; an impact component is movably provided on the outer surface of the piston; a second movable member is movably provided on one side of the impact component; a first bevel tooth is provided on the outer surface of the second movable member; a connecting component is provided at the middle position of the outer surface of the impact component; a third movable member is movably provided at the bottom of the connecting component; a third gear is provided at the bottom of the third movable member; a fourth gear is provided on the other side of the first gear; a first transmission member is provided at the middle position of the fourth gear; a second bevel tooth is provided at the top of the first transmission member; a fifth gear is provided on the other side of the fourth gear; a second transmission member is provided at the middle position of the top of the fifth gear; and a sixth gear is provided at the top of the second transmission member.
[0006] By adopting the above technical solution, the drive device, first gear, second gear, first movable part, irregular part, piston, and impact assembly constitute a first-stage stroke transmission structure; the drive device, first gear, first transmission part, fourth gear, second bevel gear, second movable part, first bevel gear, and impact assembly constitute a second-stage stroke transmission structure; the drive device, first gear, first transmission part, fourth gear, impact assembly, connecting assembly, third movable part, third gear, fifth gear, second transmission part, and sixth gear constitute a third-stage stroke transmission structure. The first-stage stroke transmission structure can drive the drill bit on the electric hammer to make a strong impact on the stone, the second-stage stroke transmission structure can drive the drill bit on the electric hammer to rotate, and the third-stage stroke transmission structure can drive the drill bit on the electric hammer to make a weaker impact on the stone. The three stroke transmission structures work together to give the electric hammer eight modes, enabling it to process different types of stone, preventing brittle stone from breaking during processing, and enabling it to process harder stone.
[0007] Preferably, the first gear meshes with the second gear and the fourth gear on both sides, and the fourth gear meshes with the fifth gear.
[0008] By adopting the above technical solution, the first gear meshes with the second gear, enabling the drive device to drive the movement of the first-stage stroke transmission structure.
[0009] Preferably, the first bevel tooth and the second bevel tooth mesh with each other, and the third gear and the sixth gear mesh with each other.
[0010] By adopting the above technical solution, the first bevel gear and the second bevel gear mesh, enabling the drive device to drive the movement of the two-stage stroke transmission structure; the first gear meshes with the fourth gear, and the fifth gear meshes with the fourth gear, which in turn meshes with the third gear and the sixth gear, enabling the drive device to drive the movement of the three-stage stroke transmission structure.
[0011] Preferably, the first movable component consists of a bearing and a transmission rod, and a movable part and a bolt are provided on one side of the outer surface of the bearing on the first movable component. The second movable component consists of a bearing and a sleeve, and the third movable component consists of a bearing and a connecting part. Push blocks are provided at both ends of the outer surface of the bearing on the second and third movable components.
[0012] By adopting the above technical solution, the first movable part cooperates with the moving part and the bolt. By rotating the bolt, the user can make the moving part move along the bolt, thereby causing the second gear and the first gear on the first-stage stroke transmission structure to separate, thus preventing the drive device from driving the first-stage stroke transmission structure to move. By pushing the push block, the user can make the second and third movable parts move, causing the first and second bevel teeth to separate from the third and sixth gears, thus preventing the drive device from driving the second-stage and third-stage stroke transmission structures to move. Reverse operation can enable the three stroke transmission structures to move through the drive device.
[0013] Preferably, a limiting block is provided on the other side of the outer surface of the sleeve of the second movable component, and a limiting groove is provided on one side of the inner surface of the impact assembly. The impact assembly is slidably connected to the sleeve through the limiting block and the limiting groove.
[0014] By adopting the above technical solution, the sleeve on the second movable part is slidably connected to the impact assembly through the limiting block and the limiting groove, and when the second movable part rotates, it can drive the impact assembly to rotate.
[0015] Preferably, the connecting assembly has a bearing inside, and the connecting assembly is rotatably connected to the impact assembly through the bearing. The bottom of the connecting assembly has a turntable, and the other side of the bottom of the turntable on the connecting assembly has a connecting rod. A limit member is provided at the middle position of the top of the connecting member on the third movable member.
[0016] By adopting the above technical solution, the connecting rod and the limiting member are slidably connected. When the connecting rod is located in the middle position of the top of the connecting member on the third movable member, the third gear and the sixth gear are separated, thereby preventing the turntable on the connecting assembly from rotating. When the connecting rod is located on one side of the top of the connecting member on the third movable member, the third gear and the sixth gear mesh, so that the turntable on the connecting assembly can rotate through the rotation of the third gear, thereby driving the connecting assembly to reciprocate, and making the impact assembly also reciprocate.
[0017] Preferably, the irregularly shaped part is rotatably connected to the piston, and the piston is slidably connected to the impact assembly.
[0018] By adopting the above technical solution, when the first-stroke transmission structure moves, the irregular part can drive the piston to reciprocate, so that the first-stroke transmission structure can drive the drill bit on the electric hammer to impact the stone.
[0019] Compared with the prior art, the beneficial effects of this utility model are: the electric hammer has a multi-stage stroke transmission structure with three stroke transmission structures. The electric hammer has eight modes through the cooperation of the three stroke transmission structures, which enables the electric hammer to process different types of stone, prevents brittle stone from breaking when processed by the electric hammer, and enables the electric hammer to process harder stone. Attached Figure Description
[0020] Figure 1 This is a front view of the structure of this utility model;
[0021] Figure 2 This is a front view of the single-stroke transmission structure of this utility model;
[0022] Figure 3 This is a front view of the two-stage stroke transmission structure of this utility model;
[0023] Figure 4 This is a front view of the three-stage stroke transmission structure of this utility model;
[0024] Figure 5 This is a top view of the third movable component of this utility model;
[0025] Figure 6 This is a structural diagram of the connection between the second movable component and the impact assembly of this utility model.
[0026] In the diagram: 1. Drive unit; 2. First gear; 3. Second gear; 4. First moving part; 5. Irregular part; 6. Piston; 7. Second moving part; 8. First bevel gear; 9. Impact assembly; 10. Connecting assembly; 100. Connecting rod; 11. Third moving part; 110. Limiting part; 12. Third gear; 13. First transmission component; 14. Fourth gear; 15. Second bevel gear; 16. Fifth gear; 17. Second transmission component; 18. Sixth gear. Detailed Implementation
[0027] 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 a part of the embodiments of the present utility model, and not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.
[0028] Please see Figure 1-6This utility model provides an embodiment of a multi-stage stroke transmission structure for an electric hammer, comprising a drive device 1: a first gear 2 is provided at the output end of the drive device 1, a second gear 3 is provided on one side of the first gear 2, a first movable member 4 is provided at the middle position of the second gear 3, a shaped member 5 is provided at the top of the first movable member 4, a piston 6 is movably provided on the other side of the top of the shaped member 5, an impact component 9 is movably provided on the outer surface of the piston 6, a second movable member 7 is movably provided on one side of the impact component 9, a first bevel tooth 8 is provided on the outer surface of the second movable member 7, a connecting component 10 is provided at the middle position of the outer surface of the impact component 9, a third movable member 11 is movably provided at the bottom of the connecting component 10, a third gear 12 is provided at the bottom of the third movable member 11, a fourth gear 14 is provided on the other side of the first gear 2, a first transmission member 13 is provided at the middle position of the fourth gear 14, a second bevel tooth 15 is provided at the top of the first transmission member 13, a fifth gear 16 is provided on the other side of the fourth gear 14, a second transmission member 17 is provided at the middle position of the top of the fifth gear 16, and a first transmission member 17 is provided at the top of the second transmission member 17. The transmission structure comprises a sixth gear 18, a drive unit 1, a first gear 2, a second gear 3, a first movable component 4, a shaped component 5, a piston 6, and an impact assembly 9, forming a first-stage stroke transmission structure; a drive unit 1, a first gear 2, a first transmission component 13, a fourth gear 14, a second bevel gear 15, a second movable component 7, a first bevel gear 8, and an impact assembly 9, forming a second-stage stroke transmission structure; and a drive unit 1, a first gear 2, a first transmission component 13, a fourth gear 14, an impact assembly 9, a connecting assembly 10, a third movable component 11, a third gear 12, and a fifth gear 16. The second transmission component 17 and the sixth gear 18 form a three-stage stroke transmission structure. The first-stage stroke transmission structure can drive the drill bit on the electric hammer to make a strong impact on the stone. The second-stage stroke transmission structure can drive the drill bit on the electric hammer to rotate. The third-stage stroke transmission structure can drive the drill bit on the electric hammer to make a weaker impact on the stone. The three stroke transmission structures work together to give the electric hammer eight modes, so that the electric hammer can process different types of stone, prevent brittle stone from breaking when processed by the electric hammer, and enable the electric hammer to process harder stone.
[0029] In this embodiment, the first gear 2 meshes with the second gear 3 and the fourth gear 14 on both sides respectively, the fourth gear 14 meshes with the fifth gear 16, and the first gear 2 meshes with the second gear 3, so that the drive device 1 can drive the movement of the first-stage stroke transmission structure.
[0030] In this embodiment, the first bevel tooth 8 and the second bevel tooth 15 mesh with each other, and the third gear 12 and the sixth gear 18 mesh with each other. The meshing of the first bevel tooth 8 and the second bevel tooth 15 enables the drive device 1 to drive the movement of the two-stage stroke transmission structure. The first gear 2 meshes with the fourth gear 14, and the fifth gear 16 meshes with the fourth gear 14, which in turn meshes with the third gear 12 and the sixth gear 18, enabling the drive device 1 to drive the movement of the three-stage stroke transmission structure.
[0031] In this embodiment, the first movable part 4 consists of a bearing and a transmission rod. A movable part and a bolt are provided on one side of the outer surface of the bearing on the first movable part 4. The second movable part 7 consists of a bearing and a sleeve. The third movable part 11 consists of a bearing and a connecting part. Push blocks are provided at both ends of the outer surface of the bearing on the second movable part 7 and the third movable part 11. The first movable part 4 is engaged with the movable part and the bolt. By rotating the bolt, the user can make the movable part move along the bolt, thereby causing the second gear 3 and the first gear 2 on the first-stage stroke transmission structure to separate, thus preventing the drive device 1 from driving the first-stage stroke transmission structure to move. By pushing the push block, the user can make the second movable part 7 and the third movable part 11 move, causing the first bevel tooth 8 and the second bevel tooth 15 to separate from the third gear 12 and the sixth gear 18, thereby preventing the drive device 1 from driving the second-stage stroke transmission structure and the third-stage stroke transmission structure to move. Reverse operation can enable the three stroke transmission structures to move through the drive device 1.
[0032] In this embodiment, a limiting block is provided on the other side of the outer surface of the sleeve on the second movable member 7, and a limiting groove is provided on one side of the inner surface of the impact component 9. The impact component 9 is slidably connected to the sleeve through the limiting block and the limiting groove. The sleeve on the second movable member 7 is slidably connected to the impact component 9 through the limiting block and the limiting groove. Moreover, when the second movable member 7 rotates, it can drive the impact component 9 to rotate.
[0033] In this embodiment, a bearing is provided inside the connecting assembly 10. The connecting assembly 10 is rotatably connected to the impact assembly 9 through the bearing. A turntable is provided at the bottom of the connecting assembly 10. A connecting rod 100 is provided on the other side of the bottom of the turntable on the connecting assembly 10. A limiting member 110 is provided at the middle position of the top of the connecting member on the third movable member 11. The connecting rod 100 is slidably connected to the limiting member 110. When the connecting rod 100 is located at the middle position of the top of the connecting member on the third movable member 11, the third gear 12 and the sixth gear 18 are separated, thereby preventing the turntable on the connecting assembly 10 from rotating. When the connecting rod 100 is located on one side of the top of the connecting member on the third movable member 11, the third gear 12 and the sixth gear 18 are engaged, so that the turntable on the connecting assembly 10 can rotate through the rotation of the third gear 12, thereby driving the connecting assembly 10 to reciprocate, and causing the impact assembly 9 to also reciprocate.
[0034] In this embodiment, the irregular part 5 is rotatably connected to the piston 6, and the piston 6 is slidably connected to the impact assembly 9. When the first-stage stroke transmission structure moves, the irregular part 5 can drive the piston 6 to reciprocate, so that the first-stage stroke transmission structure can drive the drill bit on the electric hammer to impact the stone.
[0035] Working principle: The drive unit 1, first gear 2, second gear 3, first movable part 4, irregular part 5, piston 6, and impact assembly 9 form a first-stage stroke transmission structure. The first gear 2 meshes with the second gear 3, enabling the drive unit 1 to drive the first-stage stroke transmission structure. The first movable part 4 is connected to a bolt via a moving part. By rotating the bolt, the user can move the moving part along the bolt, thereby disengaging the second gear 3 and the first gear 2 on the first-stage stroke transmission structure, preventing the drive unit 1 from driving the first-stage stroke transmission structure. The drive unit 1, first gear 2, first transmission part 13, fourth gear 14, second bevel gear 15, second movable part 7, first bevel gear 8, and impact assembly 9 form a second-stage stroke transmission structure. The first bevel gear 8 and the second bevel gear 15 mesh, enabling the drive unit 1 to drive the second-stage stroke transmission structure. The drive unit 1, first gear 2, first transmission part 13, fourth gear 14, impact assembly 9, connecting assembly 10, third movable part 11, third gear 12, fifth gear 16, second transmission part 17, and sixth gear 18 form a series of components. The system comprises a three-stage stroke transmission structure. The first gear 2 meshes with the fourth gear 14, and the fifth gear 16 meshes with the fourth gear 14, which in turn meshes with the third gear 12 and the sixth gear 18. This allows the drive unit 1 to move the three-stage stroke transmission structure. By pushing the push block, the user moves the second movable part 7 and the third movable part 11, causing the first bevel tooth 8 and the second bevel tooth 15 to separate from the third gear 12 and the sixth gear 18, thus preventing the drive unit 1 from driving the two-stage and three-stage stroke transmission structures. Reverse operation, however, allows... The three stroke transmission structures can move through the drive device 1; the first-stage stroke transmission structure can drive the drill bit on the electric hammer to make a strong impact on the stone, the second-stage stroke transmission structure can drive the drill bit on the electric hammer to rotate, and the third-stage stroke transmission structure can drive the drill bit on the electric hammer to make a weaker impact on the stone; the three stroke transmission structures work together to give the electric hammer eight modes, enabling the electric hammer to process different types of stone, preventing brittle stone from breaking during processing, and enabling the electric hammer to process harder stone.
[0036] For those skilled in the art, this invention is not limited to the details of the exemplary embodiments described above, and can be implemented in other specific forms without departing from the spirit or scope of this invention. Therefore, the embodiments of this invention are exemplary and not restrictive. The scope of this invention is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.
Claims
1. A multi-stage stroke transmission structure for an electric hammer, comprising a drive device (1), characterized in that: The output end of the drive device (1) is provided with a first gear (2), a second gear (3) is provided on one side of the first gear (2), a first movable part (4) is provided in the middle of the second gear (3), a shaped part (5) is provided on the top of the first movable part (4), a piston (6) is movably provided on the other side of the top of the shaped part (5), an impact assembly (9) is movably provided on the outer surface of the piston (6), a second movable part (7) is movably provided on one side of the impact assembly (9), a first bevel tooth (8) is provided on the outer surface of the second movable part (7), and a connecting assembly is provided in the middle of the outer surface of the impact assembly (9). (10) A third movable member (11) is movably provided at the bottom of the connecting component (10). A third gear (12) is provided at the bottom of the third movable member (11). A fourth gear (14) is provided on the other side of the first gear (2). A first transmission member (13) is provided at the middle position of the fourth gear (14). A second bevel tooth (15) is provided at the top of the first transmission member (13). A fifth gear (16) is provided on the other side of the fourth gear (14). A second transmission member (17) is provided at the middle position of the top of the fifth gear (16). A sixth gear (18) is provided at the top of the second transmission member (17).
2. The multi-stage stroke transmission structure for an electric hammer according to claim 1, characterized in that: The first gear (2) meshes with the second gear (3) and the fourth gear (14) on both sides respectively, and the fourth gear (14) meshes with the fifth gear (16).
3. The multi-stage stroke transmission structure for an electric hammer according to claim 2, characterized in that: The first bevel tooth (8) and the second bevel tooth (15) mesh with each other, and the third gear (12) and the sixth gear (18) mesh with each other.
4. The multi-stage stroke transmission structure for an electric hammer according to claim 1, characterized in that: The first movable part (4) is composed of a bearing and a transmission rod. A movable part and a bolt are provided on one side of the outer surface of the bearing on the first movable part (4). The second movable part (7) is composed of a bearing and a sleeve. The third movable part (11) is composed of a bearing and a connecting part. Push blocks are provided at both ends of the outer surface of the bearing on the second movable part (7) and the third movable part (11).
5. The multi-stage stroke transmission structure for an electric hammer according to claim 4, characterized in that: A limiting block is provided on the other side of the outer surface of the upper sleeve of the second movable part (7), and a limiting groove is provided on one side of the inner surface of the impact assembly (9). The impact assembly (9) is slidably connected to the sleeve through the limiting block and the limiting groove.
6. The multi-stage stroke transmission structure for an electric hammer according to claim 4, characterized in that: The connecting component (10) is provided with a bearing inside. The connecting component (10) is rotatably connected to the impact component (9) through the bearing. The bottom of the connecting component (10) is provided with a turntable. A connecting rod (100) is provided on the other side of the bottom of the turntable on the connecting component (10). A limiting member (110) is provided at the middle position of the top of the connecting member on the third movable member (11).
7. The multi-stage stroke transmission structure for an electric hammer according to claim 1, characterized in that: The irregular part (5) is rotatably connected to the piston (6), and the piston (6) is slidably connected to the impact assembly (9).