Electric hammer with clutch device

Abstract

The utility model discloses an electric hammer with a clutch device, belongs to the technical field of electric hammers, and aims at solving the problem that a machine body structure of an existing electric hammer is too long. According to the technical scheme, a clutch assembly comprises a clutch elastic piece and clutches fixedly connected to the two ends of the clutch elastic piece, an adjusting mechanism comprises at least two gear shifting poking pieces, and the clutches at the two ends of the clutch elastic piece are controlled by the different gear shifting poking pieces respectively. The electric hammer adopts an integrated clutch device, the space utilization rate is improved, the length of a machine body is shortened, a gear box in the electric hammer adopts a compact installation mode and a semi-surrounding structure, the length of the machine body is further shortened, and the electric hammer is more compact in structure. According to the electric hammer, the size of the handle is reduced while the operation comfort is guaranteed, the more compact and light machine body design is achieved on the basis that the efficient performance and the operation convenience of the electric hammer are kept, and the use experience of a user is improved.

Description

Technical Field

[0001] This utility model relates to the field of electric hammer technology, and more specifically, to an electric hammer with a clutch device. Background Technology

[0002] Electric hammers, as a common power tool, are widely used in construction, stone processing, and other fields. Their working principle is mainly based on an impact and rotation mechanism driven by a motor. They generate a powerful impact force through impact motion to break hard materials. However, existing electric hammers suffer from low space utilization and excessively long body structures, which not only affect their portability but also limit their work efficiency and operational flexibility.

[0003] Traditional electric hammer designs often fail to adequately consider the compact layout of components such as the motor, impact mechanism, and transmission system, resulting in an increased overall size. This makes it difficult for operators to work for extended periods. To provide greater torque output, the clutch stroke is typically long, which also increases the overall length of the electric hammer. This not only affects the balance of the hammer but also reduces user comfort. Furthermore, long-stroke clutches have high maintenance costs and are prone to wear and failure under high-speed impacts. To reduce vibration and noise generated during impacts, electric hammers also require a certain stroke buffer structure to achieve a cushioning effect, which also leads to a longer hammer body. Therefore, a new solution is needed to address the problem of excessively long existing electric hammer bodies. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide an electric hammer with a clutch device, which achieves the purpose of making the electric hammer structure compact and shortening the length of the machine body through the structural design.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: an electric hammer with a clutch device, including a housing and an output end, wherein the output modes of the electric hammer include electric drill mode, electric hammer drill mode and electric chisel mode;

[0006] The housing is equipped with a clutch device that is connected to the output end via a transmission mechanism. The transmission mechanism includes a transmission shaft and a clutch gear that is slidably connected to the transmission shaft.

[0007] The clutch device includes an adjustment mechanism for switching the output mode of the electric hammer and a clutch assembly, the two ends of which are respectively engaged with the rocker arm bearing and the clutch gear;

[0008] A gearbox is provided inside the housing, and a cavity is formed inside the gearbox to accommodate one end of the rocker arm bearing.

[0009] The housing includes a motor housing and a handle housing, and the connection between the motor housing and the handle housing includes an upper connection and a lower connection.

[0010] The clutch assembly includes a clutch elastic element and clutches fixedly connected to both ends of the clutch elastic element. The adjusting mechanism includes at least two shift paddles. The clutches at both ends of the clutch elastic element are controlled by different shift paddles. The shift paddles controlling the clutches at both ends of the clutch elastic element have opposite and partially overlapping movement paths.

[0011] The gearbox includes a support structure, which includes a support base and a housing fixed to the upper end of the support base. The housing is configured as a semi-enclosed structure. The housing is detachably connected to a limiting component. A support component is provided between the housing and the limiting component. A support groove for accommodating the support component is provided at the end of the gearbox housing away from the support base.

[0012] The electric hammer also includes a buffer structure located at the upper connection point, the buffer structure comprising several parallel buffer elastic elements.

[0013] The present invention is further configured such that: the adjusting mechanism also includes a gear shift knob, the rotation of the gear shift knob causes the gear shift paddle to move along the guide rod, and the rotation direction of the gear shift knob is consistent with the direction in which the clutch disengages from the rocker arm bearing or the clutch gear.

[0014] The present invention is further configured such that: a cam and a toggle shaft are fixedly connected to the side end face of the gear shift knob near the clutch assembly; the cam is provided with a protruding section and a flat section; and the toggle shaft is located at the end of the protruding section away from the flat section, near the edge of the cam.

[0015] The present invention is further configured such that: the gear shifting paddle has a through hole, and the shifting shaft passes through the through hole to push the gear shifting paddle to move along the guide rod.

[0016] The present invention is further configured such that: the adjusting mechanism further includes a stop component for limiting the clutch gear, the stop component includes a stop paddle and a stop elastic element, the end of the stop paddle away from the gear adjustment knob is fixedly connected to a tooth and a stop pin, the stop elastic element is sleeved on the tooth, and the stop pin is used to limit the rotation of the clutch gear.

[0017] The present invention is further configured such that: the buffer structure includes several buffer plates, and the buffer movement path of the buffer plate coincides with the length of the buffer plate adjacent to it.

[0018] The present invention is further configured such that: the buffer plate is fixedly connected with a plurality of connecting hook teeth, the connecting hook teeth are provided with through grooves, and the adjacent ends of the buffer plate are engaged with each other by the connecting hook teeth passing through the through grooves of the other.

[0019] The present invention is further configured such that: the buffer elastic element is sleeved on the pins of two adjacent buffer plates; when the buffer elastic element is deformed by external force vibration, the two buffer plates reciprocate and generate relative displacement with the deformation of the elastic element.

[0020] The present invention is further configured such that: the limiting member abuts against the support member in the direction of approaching the support base, and an anti-rotation structure is provided between the support member and the box body.

[0021] The present invention is further configured such that: a rotating groove and a rotating shaft cooperating therewith are provided at the lower end connection of the motor housing and the handle housing.

[0022] In summary, this utility model has the following beneficial effects:

[0023] This electric hammer with a clutch mechanism achieves a significant reduction in machine length through structural improvements. The hammer employs an integrated clutch system, connecting two clutches via a clutch elastic element. A gear selector knob and cam mechanism enable rapid output mode switching, improving space utilization and reducing machine length. The internal gearbox features a compact installation and semi-enclosed structure, along with the design of limiting and supporting components, reducing gearbox size and further shortening the machine length. The optimized connection between the hammer's housing and handle housing ensures operational comfort while reducing handle size, thus shortening the overall machine length. These structural improvements combine to achieve a more compact and lightweight design while maintaining high efficiency and ease of operation, enhancing the user experience. Attached Figure Description

[0024] Figure 1 It is a structural diagram of the utility model;

[0025] Figure 2 Schematic diagram of the clutch mechanism Figure 1 ;

[0026] Figure 3 Schematic diagram of the clutch mechanism Figure 2 ;

[0027] Figure 4 This is a structural diagram of the gear shift knob and the stop assembly;

[0028] Figure 5 A schematic diagram of the gear shift lever and stop assembly;

[0029] Figure 6 A sectional view of the supporting structure and transmission mechanism;

[0030] Figure 7 A structural diagram of the supporting structure;

[0031] Figure 8 A cross-sectional view of the handle housing and buffer structure;

[0032] Figure 9 for Figure 8 Enlarged view of point A in the middle;

[0033] Figure 10 This is a schematic diagram of the buffer structure;

[0034] Figure 11 This is a cross-sectional view of the handle housing and the rotating shaft.

[0035] In the diagram: 1. Housing; 101. Motor housing; 102. Handle housing; 103. Upper connection; 104. Lower connection; 2. Output end; 3. Drive shaft; 41. Rocker arm bearing; 42. Clutch gear;

[0036] 51. Clutch spring element; 52. Clutch; 6. Gear shift paddle; 61. Through hole; 7. Gear shift knob; 71. Cam; 711. Protruding section; 712. Flat section; 72. Actuating shaft; 81. Stop paddle; 811. Indenting tooth; 812. Stop pin; 82. Stop spring element;

[0037] 9. Support base; 10. Housing; 11. Limiting component; 12. Support component; 13. Support groove;

[0038] 14. Buffer elastic element; 15. Buffer plate; 151. Through groove; 16. Connecting hook tooth; 17. Rotating shaft. Detailed Implementation

[0039] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model. Example

[0040] like Figures 1-3As shown, this electric hammer with a clutch device includes a housing 1 and an output end 2. The output modes of the electric hammer include electric drill mode, electric hammer drill mode, and electric chisel mode. The output end 2 is equipped with accessories such as impact drill bit, rotary drill bit, and flat chisel. The housing 1 is provided with a clutch device that is connected to the output end 2 through a transmission mechanism. The transmission mechanism includes a transmission shaft 3 and a clutch gear 42 that is slidably connected to the transmission shaft 3. The clutch device includes an adjustment mechanism for switching the output mode of the electric hammer and a clutch assembly. The clutch assembly includes a clutch elastic element 51 and clutches 52 fixedly connected to both ends of the clutch elastic element 51. The clutch elastic element 51 is a spring. The elastic action of the clutch elastic element 51 causes the clutches 52 at both ends of the clutch elastic element 51 to engage with the rocker arm bearing 41 and the clutch gear 42, respectively. The space between the two clutches 52 is used to assemble the clutch elastic element 51 in a reasonable way, which improves the space utilization rate.

[0041] like Figures 1-3 As shown, the adjustment mechanism includes at least two shift paddles 6, a shift knob 7 set on the outer wall of the housing 1, and a stop assembly that restricts the clutch gear 42. By rotating the shift knob 7, the connection state between the clutch gear 42 and the transmission shaft 3 is changed, thereby realizing different transmission modes and adjusting the output mode of the electric hammer. The clutches 52 at both ends of the clutch elastic member 51 are controlled by different shift paddles 6. The shift paddles 6 that control the clutches 52 at both ends of the clutch elastic member 51 move in opposite directions and partially overlap. Rotating the shift knob 7 causes the shift paddles 6 to move along the guide rod. The rotation direction of the shift knob 7 is consistent with the direction in which the clutch 52 disengages from the rocker arm bearing 41 or the clutch gear 42.

[0042] like Figure 2-Figure 5As shown, the gear shift knob 7 has a cam 71 and a shift shaft 72 on its end face near the clutch assembly. The cam 71 has a protruding section 711 and a flat section 712. The shift shaft 72 is located near the edge of the cam 71 at the end of the protruding section 711 away from the flat section 712. The gear shift paddle 6 has a through hole 61. The shift shaft 72 passes through the through hole 61 and pushes the gear shift paddle 6 to move along the guide rod. When the gear shift knob is rotated, the direction of the force applied to the gear shift paddle 6 is the same as the direction of disengagement of the clutch assembly, so that the clutch assembly can respond quickly when the electric hammer switches output modes, achieving a smooth switching of output modes. The stop assembly includes a stop paddle 81 and a stop elastic element 82. The end of the stop paddle 81 away from the gear shift knob 7 is fixedly connected to a tooth 811 and a stop pin 812. The stop elastic element 82 is sleeved on the split tooth 811, and the stop pin 812 is used to limit the rotation of the clutch gear 42. The split tooth 811 along the length direction of the guide rod and the stop pin 812 formed by bending perpendicular to the length direction of the guide rod, the stop elastic element 82 is sleeved on the split tooth 811 and is in a compressed state. The stop elastic element 82 causes the end of the stop plate 81 near the rocker arm bearing 41 to abut against the outer edge of the cam 71. The clutch gear 42 has eight tooth grooves. The shape of the stop pin 812 is suitable for meshing with the tooth grooves. When the gear adjustment knob 7 is rotated to the point where the flat section 712 abuts against the stop plate 81, the stop pin 812 meshes with the tooth grooves and limits the rotation of the clutch gear 42. The integrated clutch 52 device can reduce the space required for the gear adjustment mechanism, thereby shortening the length of the electric hammer body.

[0043] like Figure 1 , Figure 6 and Figure 7 As shown, a gearbox is installed inside the housing 1. The gearbox housing 10 has a cavity inside that accommodates one end of the rocker arm bearing 41. The gearbox includes a support structure, which includes a support base 9 and a housing 10 fixed to the upper end of the support base 9. The housing 10 is a semi-enclosed structure. The housing 10 is detachably connected to a limiting member 11. A support member 12 is provided between the housing 10 and the limiting member 11. A support groove 13 for accommodating the support member 12 is opened at the end of the gearbox housing 10 away from the support base 9. The limiting member 11 abuts against the support member 12 in the direction closer to the support base 9. An anti-rotation structure is provided between the support member 12 and the housing 10. By using a more compact gear installation method, the size of the gearbox can be reduced, thereby shortening the length of the machine body.

[0044] like Figure 1 , Figures 8-11As shown, the housing 1 includes a motor housing 101 and a handle housing 102. The connection between the motor housing 101 and the handle housing 102 includes an upper connection 103 and a lower connection 104. The lower connection 104 of the motor housing 101 and the handle housing 102 is provided with a rotating groove and a rotating shaft 17 that cooperates with it. The upper connection 103 is provided with a buffer structure, which includes several parallel buffer elastic elements 14 and several buffer plates 15. The buffer movement path of the buffer plate 15 coincides with the length of the adjacent buffer plate 15. The buffer plate 15 is fixedly connected with several connecting hooks 16. The connecting hooks 16 have through slots 151. The adjacent ends of the buffer plates 15 are inserted into each other through the through slots 151 by the connecting hooks 16 and are engaged with each other. The buffer elastic element 14 is sleeved on the pins of the two adjacent buffer plates 15. When the buffer elastic element 14 is deformed by external force vibration, the two buffer plates 15 reciprocate and generate relative displacement with the deformation of the elastic element. The more compact buffer structure can effectively reduce the length of the machine body. While ensuring the comfort of operation, it can reduce the size of the handle, thereby shortening the length of the machine body.

[0045] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0046] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An electric hammer with a clutch device, comprising a housing (1) and an output end (2), wherein the output modes of the electric hammer include electric drill mode, electric hammer drill mode and electric chisel mode; The housing (1) is provided with a clutch device that is connected to the output end (2) via a transmission mechanism. The transmission mechanism includes a transmission shaft (3) and a clutch gear (42) that is slidably connected to the transmission shaft (3). The clutch device includes an adjustment mechanism for switching the output mode of the electric hammer and a clutch assembly. The two ends of the clutch assembly are respectively engaged with the rocker arm bearing (41) and the clutch gear (42). A gearbox is provided inside the housing (1), and a cavity is formed inside the gearbox housing (10) to accommodate one end of the rocker arm bearing (41); The housing (1) includes a motor housing (101) and a handle housing (102), and the connection between the motor housing (101) and the handle housing (102) includes an upper connection (103) and a lower connection (104). Its characteristics are: The clutch assembly includes a clutch elastic element (51) and clutches (52) fixedly connected to both ends of the clutch elastic element (51). The adjustment mechanism includes at least two shift paddles (6). The clutches (52) at both ends of the clutch elastic element (51) are controlled by different shift paddles (6). The shift paddles (6) that control the clutches (52) at both ends of the clutch elastic element (51) have opposite and partially overlapping movement paths. The gearbox includes a support structure, which includes a support base (9) and a housing (10) fixed to the upper end of the support base (9). The housing (10) is configured as a semi-enclosed structure. The housing (10) is detachably connected to a limiting member (11). A supporting member (12) is provided between the housing (10) and the limiting member (11). A supporting groove (13) for accommodating the supporting member (12) is opened at the end of the housing (10) of the gearbox away from the support base (9). The electric hammer also includes a buffer structure disposed at the upper connection (103), the buffer structure comprising a plurality of buffer elastic elements (14) arranged in parallel.

2. The electric hammer with a clutch device according to claim 1, characterized in that: The adjustment mechanism also includes a gear shift knob (7), which rotates to move the gear shift paddle (6) along the guide rod. The rotation direction of the gear shift knob (7) is consistent with the direction in which the clutch (52) disengages from the rocker arm bearing (41) or the clutch gear (42).

3. The electric hammer with a clutch device according to claim 2, characterized in that: The gear shift knob (7) is fixedly connected to a cam (71) and a shift shaft (72) on one end face near the clutch assembly. The cam (71) is provided with a protruding section (711) and a flat section (712). The shift shaft (72) is located at the end of the protruding section (711) away from the flat section (712) and close to the edge of the cam (71).

4. The electric hammer with a clutch device according to claim 3, characterized in that: The gear shift lever (6) has a through hole (61), and the shift shaft (72) passes through the through hole (61) to push the gear shift lever (6) to move along the guide rod.

5. An electric hammer with a clutch device according to claim 2, characterized in that: The adjustment mechanism also includes a stop assembly for limiting the clutch gear (42). The stop assembly includes a stop paddle (81) and a stop elastic element (82). The end of the stop paddle (81) away from the gear shift knob (7) is fixedly connected to a toothed gear (811) and a stop pin (812). The stop elastic element (82) is sleeved on the toothed gear (811). The stop pin (812) is used to limit the rotation of the clutch gear (42).

6. The electric hammer with a clutch device according to claim 5, characterized in that: The buffer structure also includes several buffer plates (15), the buffer movement path of the buffer plate (15) and the length of the buffer plate (15) adjacent to it are partially coincident.

7. An electric hammer with a clutch device according to claim 6, characterized in that: The buffer plate (15) is fixedly connected with a number of connecting hooks (16), and the connecting hooks (16) are provided with through slots (151). The adjacent ends of the buffer plate (15) are inserted into each other through slots (151) by the connecting hooks (16) and are engaged with each other.

8. An electric hammer with a clutch device according to claim 7, characterized in that: The buffer elastic element (14) is sleeved on the pins of two adjacent buffer plates (15). When the buffer elastic element (14) is deformed by external force vibration, the two buffer plates (15) reciprocate and generate relative displacement as the elastic element deforms.

9. An electric hammer with a clutch device according to claim 1, characterized in that: The limiting member (11) abuts against the support member (12) in the direction close to the support base (9), and an anti-rotation structure is provided between the support member (12) and the box (10).

10. An electric hammer with a clutch device according to claim 1, characterized in that: The lower end connection (104) of the motor housing (101) and the handle housing (102) is provided with a rotating groove and a rotating shaft (17) that cooperates with it.

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