Electric hammer with impact bounce protection structure

Abstract

The utility model discloses an electric hammer with an impact bounce protection structure, which comprises an electric hammer body, connecting plates are arranged on the upper side and the lower side of one end of the electric hammer body, the surfaces of the connecting plates are connected with elastic connecting pieces, the connecting plates are connected with a grab handle through the elastic connecting pieces, and the other end of the electric hammer is sleeved with a fixing ring. According to the electric hammer, due to the arrangement of the elastic connecting piece, when the electric hammer works, generated vibration and impact force are transmitted to the connecting plate, and the elastic connecting piece between the connecting plate and the grab handle plays a role; when the electric hammer works, the telescopic end of the damper stretches out and draws back under vibration and impact force, damping in the damper plays a role and slows down vibration transmission, the spring arranged on the damper in a sleeving mode is compressed or stretched, vibration energy is absorbed and buffered through elastic deformation of the spring, and therefore vibration transmitted to the grab handle when the electric hammer works is effectively relieved, and operation comfort is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electric hammers, in particular to an electric hammer with a structure for protecting against impact and rebound force. Background Technique

[0002] An electric hammer is an electric rotary hammer drill with a pneumatic hammering mechanism and a safety clutch. The electric hammer uses the principle of piston movement to compress gas to impact the drill bit. One doesn't need to exert much force by hand and can drill holes in hard materials such as concrete, bricks, and stones. The electric hammer has a high drilling efficiency on these materials.

[0003] Chinese patent with publication number CN214686381U discloses a multifunctional brushless lithium - battery double - hand electric hammer, including an electric hammer body. A fixed ring is fixedly connected to one circumferential side of the electric hammer body. An auxiliary handle is fixedly connected to the bottom end of the fixed ring. Two spring telescopic rods are clamped to one side of the auxiliary handle. One end of each spring telescopic rod is fixedly connected to a fixed baffle. Two fixed blocks are fixedly connected to both sides of the fixed baffle. A fixed shaft is fixedly connected between the fixed blocks. A rotating column is rotatably connected to one side of the fixed shaft, and a return spring is sleeved on one side of the fixed shaft. A rotating plate is fixedly connected to one side of the rotating column, and a connecting belt is fixedly connected to one side of the rotating plate. This utility model can effectively prevent debris from being generated during construction and splashing onto the hands of construction workers, reducing the harm to the hands of workers. Secondly, the design of the rotating plate increases the protection area and improves the safety of the device.

[0004] The above - mentioned multifunctional brushless lithium - battery double - hand electric hammer still has some problems in use. Although it can effectively prevent debris from being generated during construction and splashing onto the hands of construction workers, during the use of the electric hammer, vibrations are bound to occur. If the vibration cannot be well transmitted, when the vibration is too large, it is possible that the hands of the workers cannot withstand the generated vibration force, resulting in the situation of the electric hammer slipping out of the hand. Content of the Utility Model

[0005] The purpose of the present utility model is to provide an electric hammer with a structure for protecting against impact and rebound force, so as to solve the problem proposed in the above background technique that during the use of the electric hammer, vibrations are bound to occur. When the vibration is too large, it is possible that the hands of the workers cannot withstand the generated vibration force, resulting in the situation of the electric hammer slipping out of the hand.

[0006] To achieve the above - mentioned purpose, the present utility model provides the following technical solutions:

[0007] An electric hammer with a protective impact rebound force structure, comprising an electric hammer body. On both the upper and lower sides of one end of the electric hammer body, connecting plates are provided. An elastic connecting member is connected to the surface of the connecting plates. The connecting plates are connected to a handle through the elastic connecting member. A fixing ring is sleeved on the other end of the electric hammer. The bottom of the fixing ring is detachably connected to a grip. A protective cover is provided below the fixing ring and on one side of the grip.

[0008] The elastic connecting member includes dampers fixedly connected to both the upper and lower sides of one end of the handle. The telescopic ends of the two dampers are both fixedly connected with abutting disks. The two abutting disks are respectively fixedly connected to the surfaces of connecting blocks at corresponding heights. A limiting member is provided on the surface of the damper. A spring is sleeved on the surface of the damper between the limiting member and the abutting disk. The two ends of the spring respectively contact the surfaces of the abutting disk and the limiting member.

[0009] Preferably, the limiting member includes an external thread provided on the surface of the damper. The damper is threadedly connected with a nut through the external thread.

[0010] Preferably, threaded rings are fixedly connected to the ends of the abutting disks facing the dampers. Plugging grooves are respectively formed on the surfaces of the connecting plates and the handle at positions corresponding to the threaded rings. The four threaded rings are respectively plugged into the inner cavities of the plugging grooves at corresponding positions. Circular holes are respectively formed on the surfaces of the connecting plates and the handle at positions corresponding to the plugging grooves. Bolts are plugged into the inner cavities of the circular holes. The bolts respectively penetrate through the circular holes at corresponding positions and are threadedly connected to the inner cavities of the threaded rings at corresponding positions.

[0011] Preferably, guiding holes are respectively formed on one side of the connecting plates. Guide rods are slidably plugged into the inner cavities of the guiding holes. One ends of the guide rods are fixedly connected to the surface of the handle.

[0012] Preferably, a connecting block is fixedly connected to the bottom of the fixing ring. Limiting grooves are respectively formed on both the bottom sides of the connecting block. Limiting blocks are clamped in the inner cavities of the limiting grooves. One ends of the two limiting blocks are fixedly connected to the surface of the protective cover.

[0013] Preferably, a threaded column is fixedly connected to the bottom of the connecting block. The threaded column is threadedly connected to the top of the grip.

[0014] Compared with the prior art, the beneficial effects of the present utility model are:

[0015] 1. With the elastic connecting piece provided in the utility model, when the electric hammer works, the vibration and impact force generated are transmitted to the connecting plate. The elastic connecting piece between the connecting plate and the handle plays a role. The telescopic end of the damper is telescoped due to the vibration and impact force, and the damper inside it plays a role in slowing down the vibration transmission. The spring sleeved on the damper is compressed or stretched, and the elastic deformation of the spring absorbs and buffers the vibration energy, thus effectively reducing the vibration transmitted to the handle during the operation of the electric hammer, improving the operation comfort, and the protective cover can effectively protect the hands of the operator, increasing the operation safety.

[0016] 2. With the nut provided in the utility model, the telescopic range of the spring can be simply and effectively limited, preventing the spring from being damaged due to excessive telescoping, ensuring the stable performance and durability of the elastic connecting piece, and the formation of the spring can be adjusted according to personal usage habits, making it more convenient to use.

[0017] 3. With the limit groove and the limit block provided in the utility model, the limit block is clamped in the inner cavity of the limit groove, and the protective cover can be firmly installed, not easily loosened or fallen off during the operation of the electric hammer, and can reliably block debris and other possible injuries, ensuring the safety of the operator. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural view of the electric hammer with a structure for protecting against impact and rebound force of the utility model;

[0019] Figure 2 is a schematic structural view of the handle of the utility model;

[0020] Figure 3 is a schematic structural view of the insertion slot of the utility model;

[0021] Figure 4 is a schematic structural view of the external thread of the utility model.

[0022] In the figure: 100, electric hammer body; 101, connecting plate; 102, bolt; 103, guide rod; 104, fixing ring; 105, connecting block; 106, protective cover; 107, handle; 108, limit block; 109, threaded column; 110, handle grip; 111, limit groove; 200, spring; 201, round hole; 202, insertion slot; 203, guide hole; 204, damper; 205, external thread; 206, nut; 207, abutting disc; 208, threaded ring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0024] Please refer to Figures 1-4 , this embodiment provides a hammer drill with a structure for protecting impact rebound force, including a hammer drill body 100. On both the upper and lower sides of one end of the hammer drill body 100, connecting plates 101 are provided. An elastic connecting member is connected to the surface of the connecting plate 101. The connecting plate 101 is connected to a handle 110 through the elastic connecting member. A fixing ring 104 is sleeved on the other end of the hammer drill. A handle 107 is detachably connected to the bottom of the fixing ring 104. A protective cover 106 is provided below the fixing ring 104 and on one side of the handle 107.

[0025] The elastic connecting member includes dampers 204 fixedly connected to both the upper and lower sides of one end of the handle 107. The telescopic ends of the two dampers 204 are both fixedly connected with abutting discs 207. The two abutting discs 207 are respectively fixedly connected to the surfaces of the connecting blocks 105 at corresponding heights. A limiting member is provided on the surface of the damper 204. A spring 200 is sleeved on the surface of the damper 204 between the limiting member and the abutting disc 207. The two ends of the spring 200 respectively contact the surfaces of the abutting disc 207 and the limiting member. Through the setting of the elastic connecting member, when the hammer drill works, the generated vibration and impact force are transmitted to the connecting plate 101. The elastic connecting member between the connecting plate 101 and the handle 110 plays a role. The telescopic end of the damper 204 expands and contracts under the action of vibration and impact force, and the damping inside it plays a role in slowing down the transmission of vibration. The spring 200 sleeved on the damper 204 is compressed or stretched. The elastic deformation of the spring 200 absorbs and buffers the vibration energy, thereby effectively reducing the vibration transmitted to the handle 110 during the operation of the hammer drill, improving the operation comfort, and the protective cover 106 can effectively protect the hands of the operator and increase the operation safety.

[0026] Further, the limiting member includes an external thread 205 provided on the surface of the damper 204. The damper 204 is threadedly connected with a nut 206 through the external thread 205. Through the setting of the nut 206, the telescopic range of the spring 200 can be simply and effectively limited, preventing the spring 200 from being damaged due to excessive expansion and contraction, ensuring the stable performance and durability of the elastic connecting member, and the stroke of the spring 200 can be adjusted according to personal usage habits, and the softness and hardness of the spring 200 can be adjusted, so that it is more convenient to use.

[0027] Furthermore, threaded rings 208 are fixedly connected to one end of the abutting plate 207 and the damper 204 facing each other. Insertion slots 202 are provided on the surface of the connecting plate 101 and the handle 110 and at positions corresponding to the threaded rings 208. The four threaded rings 208 are respectively inserted into the inner cavities of the insertion slots 202 at corresponding positions. Circular holes 201 are provided on the surface of the connecting plate 101 and the handle 110 and at positions corresponding to the insertion slots 202. Bolts 102 are inserted into the inner cavities of the circular holes 201. The bolts 102 respectively penetrate through the circular holes 201 at corresponding positions and are threadedly connected to the inner cavities of the threaded rings 208 at corresponding positions. Through the setting of the bolts 102, the bolts 102 are disassembled, so as to release the connection between the elastic connecting member and the handle 110, which is convenient for assembly and disassembly, and is convenient for the maintenance and replacement of components. Moreover, the method of fixing with bolts 102 has high reliability.

[0028] Preferably, guide holes 203 are provided on one side of the connecting plate 101. Guide rods 103 are slidably inserted into the inner cavities of the guide holes 203. One end of each guide rod 103 is fixedly connected to the surface of the handle 110. Through the setting of the guide rods 103 and the guide holes 203, the cooperation between the guide rods 103 and the guide holes 203 can ensure that the handle 110 moves smoothly along a predetermined direction during vibration, avoid deviation or shaking, make the operation more accurate, and at the same time reduce the abnormal wear between components.

[0029] It should be noted that a connecting block 105 is fixedly connected to the bottom of the fixing ring 104. Limit slots 111 are provided at the bottoms of both sides of the connecting block 105. Limit blocks 108 are clamped in the inner cavities of the limit slots 111. One end of each of the two limit blocks 108 is fixedly connected to the surface of the protective cover 106. Through the setting of the limit slots 111 and the limit blocks 108, the limit blocks 108 are clamped in the inner cavities of the limit slots 111, which can firmly install the protective cover 106, and it is not easy to loosen or fall off during the operation of the electric hammer, and can reliably block debris and other possible injuries to ensure the safety of the operator.

[0030] Furthermore, a threaded column 109 is fixedly connected to the bottom of the connecting block 105. The threaded column 109 is threadedly connected to the top of the handle 107. Through the setting of the threaded column 109, it is convenient for the installation and disassembly of the handle 107, which is beneficial to maintenance and replacement. At the same time, it can ensure the stability of the connection, ensure that the handle 107 will not loosen during the operation process, and when the handle 107 is tightened, the limit blocks 108 are further fixed to prevent the protective cover 106 from falling off.

[0031] Working principle;

[0032] When the electric hammer is working, the vibration and impact force are transmitted to the connecting plate 101. The elastic connecting piece between the connecting plate 101 and the handle 110 plays a role. The telescopic end of the damper 204 is telescoped under the vibration and impact force, and the damping inside it plays a role in slowing down the vibration transmission. The spring 200 sleeved on the damper 204 is compressed or stretched, and the elastic deformation of the spring 200 absorbs and buffers the vibration energy. The limiting piece composed of the external thread 205 on the damper 204 and the nut 206 prevents the spring 200 from excessive telescoping, ensuring the stable operation of the spring 200 and the damper 204. And at the other end of the electric hammer body 100, the fixing ring 104 is sleeved on the electric hammer, and the connecting block 105 at its bottom is detachably connected to the handle 107 through the threaded column 109. The protective cover 106 is clamped with the limiting grooves 111 at the bottoms of both sides of the connecting block 105 through the limiting blocks 108 on its surface, preventing gravel and the like from hitting the user's hand, and effectively protecting the operator during work.

[0033] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An electric hammer with a structure for protecting against impact rebound force, characterized in that, It includes a hammer drill body (100). On both the upper and lower sides of one end of the hammer drill body (100), connecting plates (101) are provided. An elastic connecting member is connected to the surface of the connecting plates (101). The connecting plates (101) are connected to a handle (110) through the elastic connecting member. A fixing ring (104) is sleeved on the other end of the hammer drill. A handle grip (107) is detachably connected to the bottom of the fixing ring (104). A protective cover (106) is provided below the fixing ring (104) and on one side of the handle grip (107). The elastic connecting member includes dampers (204) fixedly connected to both the upper and lower sides of one end of the handle (110). The telescopic ends of the two groups of dampers (204) are fixedly connected with abutting discs (207). The two groups of abutting discs (207) are respectively fixedly connected to the surfaces of connecting blocks (105) at corresponding heights. A limiting member is provided on the surface of the damper (204). A spring (200) is sleeved on the surface of the damper (204) between the limiting member and the abutting disc (207). The two ends of the spring (200) respectively contact the surfaces of the abutting disc (207) and the limiting member.

2. The electric hammer with a protective impact rebound force structure according to claim 1, characterized in that; The limiting member includes an external thread (205) provided on the surface of the damper (204). The damper (204) is threadedly connected with a nut (206) through the external thread (205).

3. The electric hammer with a protective impact rebound force structure according to claim 2, characterized in that: Threaded rings (208) are fixedly connected to the opposite ends of the abutting disc (207) and the damper (204). Plugging grooves (202) are respectively opened on the surfaces of the connecting plates (101) and the handle (110) at positions corresponding to the threaded rings. The four groups of threaded rings (208) are respectively plugged into the inner cavities of the plugging grooves (202) at corresponding positions. Circular holes (201) are respectively opened on the surfaces of the connecting plates (101) and the handle (110) at positions corresponding to the plugging grooves (202). Bolts (102) are plugged into the inner cavities of the circular holes (201). The bolts (102) respectively penetrate through the circular holes (201) at corresponding positions and are threadedly connected to the inner cavities of the threaded rings (208) at corresponding positions.

4. The electric hammer with a protective impact rebound force structure according to claim 3, wherein: Guide holes (203) are respectively opened on one side of the connecting plates (101). Guide rods (103) are slidably plugged into the inner cavities of the guide holes (203). One ends of the guide rods (103) are fixedly connected to the surface of the handle (110).

5. The electric hammer with a protective impact rebound force structure according to claim 4, characterized in that: A connecting block (105) is fixedly connected to the bottom of the fixing ring (104). Limiting grooves (111) are respectively opened at the bottoms of both sides of the connecting block (105). Limiting blocks (108) are clamped in the inner cavities of the limiting grooves (111). One ends of the two groups of limiting blocks (108) are fixedly connected to the surface of the protective cover (106).

6. A hammer drill with a protective impact rebound force structure according to any one of claims 1-5, characterized in that: A threaded column (109) is fixedly connected to the bottom of the connecting block (105). The threaded column (109) is threadedly connected to the top of the handle grip (107).

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