Electric hammer for concrete structure engineering chiseling construction

Abstract

The application provides a concrete structure engineering chisel construction electric hammer, relates to the superimposed plate chipping technology field, and includes a chisel part, a humidification protection piece is installed on the chisel part; the humidification protection piece is used for chipping humidification; a chipping control piece is installed on the humidification protection piece; the chipping control piece is used for preventing excessive chipping; a root cleaning butt joint piece is installed on the chisel part; a buffer root cleaning piece is installed on the root cleaning butt joint piece; the buffer root cleaning piece is used for buffering and cleaning the root concrete of reinforcement; the chipping control piece can be used for shielding and protecting outside the chipping steel drill, avoids that the chipping steel drill excessively approaches the root of the superimposed plate, and cooperates with the humidification protection piece, so that the chisel depth of the chipping steel drill can be monitored, and the depth of single chisel is prevented from exceeding the standard; the problems that the current chisel electric hammer is difficult to automatically realize depth control protection and the supporting chisel steel drill function is single are solved.

Description

Technical Field

[0001] This invention relates to the field of roughening technology for composite slabs, and more particularly to an electric hammer for chiseling construction in concrete structure engineering. Background Technology

[0002] In actual composite slab construction, after prefabrication, the flat end faces need to be chiseled before pouring. Chiseling the composite slab primarily removes laitance, loose aggregate, and contaminants from the surface, creating a rough, uneven interface to increase the contact area and mechanical bonding force between the old and new concrete. Chiseling is typically done using an electric hammer with a specialized chisel. While electric hammers are efficient, the continuous vibration and visual interference from debris can affect the worker's judgment of the chiseling depth. Exceeding the chiseling depth, combined with the hammer's vibration, can easily cause microcracks in the composite slab, affecting the chiseling quality and hindering automatic depth control. Furthermore, traditional chisels are limited in function; due to the presence of reinforcing bars on the composite slab end faces, direct vibration chiseling around the reinforcing bars is not possible as it can easily damage them. A secondary manual cleaning of the laitance roots is usually required, making it difficult to buffer and clean the laitance around the reinforcing bar roots. Summary of the Invention

[0003] This invention relates to an electric hammer for chiseling construction in concrete structures, in order to solve the problems of current chiseling electric hammers being unable to automatically achieve depth control and protection, and having a single function for the matching chiseling chisel.

[0004] In a first aspect, this invention provides an electric hammer for chiseling concrete structures, specifically comprising a chiseling section, on which a humidifying protective component is installed; the humidifying protective component is used for humidifying the chiseling surface; a chiseling control component is installed on the humidifying protective component; the chiseling control component is used to prevent excessive chiseling; a root cleaning connection component is installed on the chiseling section; a buffer root cleaning component is installed on the root cleaning connection component; the buffer root cleaning component is used to buffer the cleaning of concrete at the root of reinforcing bars; the chiseling section includes: an electric hammer body and a chiseling chisel, the output end of the electric hammer body is equipped with the chisel; the end of the chisel has a tapered bevel structure; the chisel is used for chiseling composite slabs; the electric hammer body is connected to an external power supply; a power switch is provided on the handle of the electric hammer body; and a groove is provided on the chisel.

[0005] Preferably, the chiseling part further includes a docking limiting groove, wherein the chiseling steel rod is provided with a docking limiting groove, and the docking limiting groove is an arc-shaped groove.

[0006] Preferably, the humidifying protective component includes: a clamping cover, rubber sheets, and a connecting sleeve. Two clamping covers are provided, and the two clamping covers are fixedly connected by bolts. The two clamping covers are fixedly clamped onto the main body of the electric hammer. The ends of the two clamping covers are threaded. A row of rubber sheets is fixedly installed on the inner side of each of the two clamping covers. The inner sides of the two rows of rubber sheets contact the outer side of the chisel. The connecting sleeve is threadedly connected to the two clamping covers and is located on the outer side of the chisel.

[0007] Preferably, the humidification protection component further includes: a guide key strip, a compression ring groove, a water inlet pipe, and a support spring. The guide key strip is fixedly installed on the connecting sleeve. The outer side of the connecting sleeve has a compression ring groove, and the inner side of the connecting sleeve has a beveled structure. The water inlet pipe is fixedly installed on the connecting sleeve and communicates with the inner side of the connecting sleeve. The support spring is sleeved on the connecting sleeve.

[0008] Preferably, the chiseling control component includes: a protective cylinder, which is slidably sleeved on the connecting sleeve; the end of the protective cylinder has an inclined structure; a groove is provided on the inner side of the protective cylinder, and the guide key slides in the groove on the inner side of the protective cylinder; one end of the support spring is fixedly connected to the protective cylinder, and the other end of the support spring is fixedly connected to the connecting sleeve.

[0009] Preferably, the chiseling control component further includes: a power-off switch, which is fixedly installed on the protective cylinder, and the pressing end of the power-off switch is located in the extrusion ring groove; the power-off switch is electrically connected to the power switch on the handle of the electric hammer body.

[0010] Preferably, the root cleaning and mating component includes: a mating sleeve and a mating key strip, wherein the mating sleeve is slidably fitted onto the chisel; the mating key strip is fixedly installed on the inner side of the mating sleeve, and the mating key strip slides in a groove on the chisel.

[0011] Preferably, the root-cleaning docking component further includes: a limiting mounting shell, a protruding post, and a limiting spring. The limiting mounting shell is fixedly sleeved on the docking sleeve. The protruding post is slidably sleeved on the inner side of the limiting mounting shell. The end of the protruding post has an arc-shaped structure. The end of the protruding post is inserted into the docking limiting groove. A limiting spring is sleeved on the inner side of the limiting mounting shell. One end of the limiting spring is connected to the inner side of the limiting mounting shell, and the other end of the limiting spring is fixedly connected to the protruding post.

[0012] Preferably, the buffer clearing component includes: a buffer sleeve, a buffer spring, and a push ring. The buffer sleeve is slidably sleeved on the docking sleeve. A buffer spring is sleeved on the inner side of the buffer sleeve. A push ring is fixedly sleeved on the buffer sleeve, and the push ring is located on the front side of the protective cylinder. One end of the buffer spring is fixedly connected to the inner side of the buffer sleeve, and the other end of the buffer spring is fixedly connected to the docking sleeve.

[0013] Preferably, the buffer cleaning component further includes: a cleaning tooth block and a cleaning brush, wherein the cleaning tooth block is fixedly mounted on the buffer sleeve by bolts; the end of the cleaning tooth block is provided with protruding teeth; and the cleaning brush is fixedly mounted on the cleaning tooth block.

[0014] This invention provides an electric hammer for chiseling concrete structures, which has the following advantages:

[0015] The chisel section in this invention allows workers to easily perform chiseling operations by hand, making it flexible to use. At the same time, when used with a humidifying protective component, it can be used to add water to moisturize and remove dust when workers are chiseling the end face of the composite board, which can prevent a large amount of dust from spreading.

[0016] In addition, the use of a chiseling control device can shield and protect the outside of the chisel, preventing it from getting too close to the root of the laminated plate. At the same time, in conjunction with a humidification protection device, the chiseling depth of the chisel can be monitored to prevent the chisel from going too deep into the end face of the laminated plate in a single chiseling operation, which could cause cracks in the laminated plate under strong vibration. The device can automatically control and stop chiseling when the chiseling depth exceeds the limit, which can reduce the difficulty of chiseling operations for workers.

[0017] Furthermore, the use of a buffer cleaning component facilitates quick assembly by connecting the cleaning connector with the chisel. This makes it more suitable for chiseling and cleaning composite slabs, avoiding the problems of difficulty in controlling the cleaning pressure when using the chisel to remove laitance around the reinforcing bars, which can easily impact the reinforcing bars, causing hidden cracks in the composite slab and excessive wear on the reinforcing bars. The buffer spring provides cushioning during chiseling, preventing the chisel from directly impacting the reinforcing bars. At the same time, the push ring used in this structure can limit the maximum compression stroke of the buffer spring, preventing the buffer spring from exhausting its compression stroke and causing the buffering effect to fail. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly described below.

[0019] The accompanying drawings described below are only related to some embodiments of the invention and are not intended to limit the invention.

[0020] In the attached diagram:

[0021] Figure 1 This application shows a schematic diagram of the overall structure of an electric hammer for chiseling concrete structures.

[0022] Figure 2 A schematic diagram of the bottom structure of an electric hammer for chiseling concrete structures according to this application is shown.

[0023] Figure 3 This invention illustrates a schematic diagram of a hammer drill used in the chiseling construction of a concrete structure for cleaning the reinforcing bars of a composite slab.

[0024] Figure 4 A schematic diagram of the overall structure of the chisel section of this application is shown;

[0025] Figure 5 A cross-sectional view of the buffer clearing structure of this application is shown;

[0026] Figure 6 A schematic diagram of the overall structure of the humidification protection component of this application is shown;

[0027] Figure 7 A schematic diagram of the extrusion ring groove structure of this application is shown;

[0028] Figure 8 This invention provides a schematic diagram showing the removal of a joint joint after using an electric hammer for chiseling construction in a concrete structure.

[0029] Figure 9 A cross-sectional view of the root-cleaning joint structure of this application is shown;

[0030] Figure 10 This application shows Figure 9 Enlarged view of the structure of region E in the middle.

[0031] The attached figure label list is as follows:

[0032] 1. Chisel section; 101. Electric hammer body; 102. Chisel chisel; 1021. Butt joint limiting groove; 2. Humidification protection component; 201. Clamping cover; 2011. Rubber sheet; 202. Connecting sleeve; 2021. Guide key strip; 2022. Extrusion ring groove; 203. Water inlet pipe; 204. Support spring; 3. Chisel control component; 301. Protective cylinder; 302. Power off switch; 4. Root cleaning butt joint component; 401. Butt joint sleeve; 4011. Butt joint key strip; 402. Limit mounting shell; 403. Protruding post; 404. Limit spring; 5. Buffer root cleaning component; 501. Buffer sleeve; 5011. Buffer spring; 502. Push ring; 503. Root cleaning tooth block; 504. Cleaning brush. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the described embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] Example 1: Please refer to Figures 1 to 10 :

[0035] This invention proposes an electric hammer for chiseling concrete structures, comprising a chiseling section 1, on which a humidifying protective component 2 is installed; the humidifying protective component 2 is used for humidifying the chiseling surface; a chiseling control component 3 is installed on the humidifying protective component 2; the chiseling control component 3 is used to prevent excessive chiseling; a root cleaning connection component 4 is installed on the chiseling section 1; a buffer root cleaning component 5 is installed on the root cleaning connection component 4; the buffer root cleaning component 5 is used to buffer the cleaning of concrete at the root of reinforcing bars; the chiseling section 1 includes: an electric hammer body 101 and a chiseling steel chisel 102, the output end of the electric hammer body 101 is equipped with the chiseling steel chisel 102; the end of the chiseling steel chisel 102 has a tapered inclined surface structure; the chiseling steel chisel 102 is used for chiseling composite slabs; the electric hammer body 101 is connected to an external power supply; the handle of the electric hammer body 101 is equipped with a power switch; the chiseling steel chisel 102 is equipped with a sliding groove.

[0036] In this embodiment of the invention, the chiseling part 1 further includes: a docking limiting groove 1021, on which the chiseling steel rod 102 is provided with a docking limiting groove 1021, and the docking limiting groove 1021 is an arc-shaped groove; the humidifying protective component 2 includes: a clamping cover 201, a rubber sheet 2011 and a connecting sleeve 202, two clamping covers 201 are provided, and the two clamping covers 201 are fixedly connected by bolts; the two clamping covers 201 are fixedly clamped and sleeved on the electric hammer body 101; the ends of the two clamping covers 201 are provided with threads; a row of rubber sheets 2011 are fixedly installed on the inner side of the two clamping covers 201 respectively; the inner side of the two rows of rubber sheets 2011 contacts the outer side of the chiseling steel rod 102; the connecting sleeve 202 is threadedly connected to the two clamping covers 201; the connecting sleeve 202 is located on the chiseling steel rod 102. 02 Outer side; Humidifying protective component 2 also includes: guide key strip 2021, extrusion ring groove 2022, water inlet pipe 203 and support spring 204. The guide key strip 2021 is fixedly installed on the connecting sleeve 202. The connecting sleeve 202 has an extrusion ring groove 2022 on its outer side, and the inner side of the connecting sleeve 202 has a sloping structure. The water inlet pipe 203 is fixedly installed on the connecting sleeve 202 and connects to the inner side of the connecting sleeve 202. The support spring 204 is sleeved on the connecting sleeve 202. The chisel part 1 makes it easy for workers to perform chiseling operations by hand, which is flexible in use. At the same time, in conjunction with the humidifying protective component 2, it can be used to add water to moisturize and remove dust when workers are chiseling the end face of the composite plate, which can prevent a large amount of dust from spreading. The structure and operation are simple.

[0037] In this embodiment of the invention, the chiseling control component 3 includes: a protective cylinder 301, which is slidably sleeved on the connecting sleeve 202; the end of the protective cylinder 301 has a beveled structure; a groove is provided on the inner side of the protective cylinder 301, and the guide key 2021 slides in the groove on the inner side of the protective cylinder 301; one end of the support spring 204 is fixedly connected to the protective cylinder 301, and the other end of the support spring 204 is fixedly connected to the connecting sleeve 202; the chiseling control component 3 also includes: a power-off switch 302, which is fixedly installed on the protective cylinder 301, and the pressing end of the power-off switch 302 is located in the extrusion ring groove 2022; the power-off switch 302 is electrically connected to an electric... The hammer body 101 has an energizing switch on its handle. The chiseling control component 3 can shield and protect the chisel 102 from getting too close to the root of the composite plate. In conjunction with the humidifying protection component 2, the chiseling depth of the chisel 102 can be monitored to prevent the chisel 102 from going too deep into the end face of the composite plate and causing cracks in the composite plate under strong vibration. The chiseling can be automatically stopped when the chiseling depth of the chisel 102 exceeds the limit, which can reduce the difficulty of chiseling operation for workers and avoid the inaccuracy of relying on visual observation and pressing feel.

[0038] In Example 2, based on Example 1, the root-cleaning joint component 4 includes: a joint sleeve 401 and a joint key strip 4011. The joint sleeve 401 is slidably fitted onto the roughening steel rod 102. The joint key strip 4011 is fixedly installed on the inner side of the joint sleeve 401, and the joint key strip 4011 slides in a groove on the roughening steel rod 102. The root-cleaning joint component 4 also includes: a limiting mounting shell 402, a protruding post 403, and a limiting spring 404. The limiting mounting shell 402 is fixedly fitted onto the joint sleeve 401. The protruding post 403 is slidably fitted onto the inner side of the limiting mounting shell 402. The end of the protruding post 403 has an arc-shaped structure. The end of the protruding post 403 is inserted into... The buffer sleeve 5 is connected to the docking limiting groove 1021; a limiting spring 404 is sleeved inside the limiting mounting shell 402; one end of the limiting spring 404 is connected to the inside of the limiting mounting shell 402, and the other end of the limiting spring 404 is fixedly connected to the protruding post 403; the buffer cleaning component 5 includes: a buffer sleeve 501, a buffer spring 5011, and a pushing ring 502. The buffer sleeve 501 is slidably sleeved on the docking sleeve 401; a buffer spring 5011 is sleeved inside the buffer sleeve 501; a pushing ring 502 is fixedly sleeved on the buffer sleeve 501, and the pushing ring 502 is located in front of the protective cylinder 301; one end of the buffer spring 5011 is fixedly connected to the buffer sleeve 502. On the inner side of 01, the other end of the buffer spring 5011 is fixedly connected to the docking sleeve 401; the buffer cleaning component 5 also includes: a cleaning tooth block 503 and a cleaning brush 504. The cleaning tooth block 503 is fixedly installed on the buffer sleeve 501 by bolts; the end of the cleaning tooth block 503 is provided with protruding teeth; the cleaning brush 504 is fixedly installed on the cleaning tooth block 503; the use of the buffer cleaning component 5 can facilitate the connection of the cleaning docking component 4 with the chisel 102, and quickly carry out the assembly work. It can be better suited for the chiseling and cleaning work of composite slabs, and avoids the difficulty in controlling the cleaning pressure when cleaning the laitance around the reinforcing bars with the chisel 102, which is prone to damage. To address the issues of impacting reinforcing bars, causing microcracks in the composite slab and excessive wear on the reinforcing bars, a buffer spring 5011 is used to buffer the chiseling process, preventing the chisel 102 from directly impacting the reinforcing bars. Simultaneously, the push ring 502 used in this structure limits the maximum compression stroke of the buffer spring 5011, preventing the spring from exhausting its compression stroke and causing a loss of buffering effect. A cleaning brush 504 further enhances the functionality of this structure. Combined with the water inlet pipe 203, it assists in cleaning the chiseled end face of the composite slab. The cleaning brush 504, made of steel wire bristles, helps to remove impurities during chiseling.

[0039] The working principle of this embodiment is as follows: Connect the water inlet pipe 203 to the water source pipe, then hold the electric hammer body 101 and press the roughening steel chisel 102 against the end face of the composite plate. Then press the power switch of the electric hammer body 101 to perform large-area chiseling. Utilizing the inclined structure at the end of the protective cylinder 301, the worker can easily tilt the roughening steel chisel 102 for chiseling. During this process, the water inlet pipe 203 can maintain drainage to moisturize and remove dust during chiseling. During chiseling, it is necessary to avoid the root area of ​​the reinforcing bars in the composite plate, leaving at least a certain distance around the reinforcing bars. Two centimeters apart; when the chisel 102 is chiseling the end face of the composite plate, if the chisel 102 penetrates the end face of the composite plate to an excessive depth, the protective cylinder 301 will be stopped by the end face of the composite plate as the chisel 102 penetrates deeper. When the worker continues to press down, the protective cylinder 301 will move up, causing the power-off switch 302 to move up. At this time, the pressing end of the power-off switch 302 will be squeezed by the inclined surface of the extrusion groove 2022. The power-off switch 302 can quickly control the power-off protection of the electric hammer body 101. The worker can then lift the electric hammer body 101 in time.

[0040] After chiseling the main area of ​​the end face of the composite slab, it is necessary to clean the laitance at the base of the reinforcing bars. Since the required chiseling depth for the laitance at the base of the reinforcing bars is relatively low, the butt sleeve 401 can be inserted into the chisel 102. At this time, the protruding post 403 can slide along the surface of the chisel 102 using the arc-shaped structure at its end. After sliding to the butt limiting groove 1021, the protruding post 403 can be inserted into the butt limiting groove 1021 under the compression of the limiting spring 404 for limiting. Then, the cleaning tooth block 503 can be placed close to the laitance layer in the area of ​​the reinforcing bar base. At this time, the electric hammer body 101 is started, and the vibration impact of the chisel 102 will be transmitted to the butt sleeve 401. The butt sleeve 401 will buffer the vibration through the buffer spring. After the elastic buffer of 5011, the material is transferred to the buffer sleeve 501, and then the cleaning tooth block 503 cleans the laitance layer. This reduces the probability of damage to the steel bars and composite slabs during the cleaning operation. When the worker holds the electric hammer body 101 and presses the cleaning tooth block 503 against the cleaning area, the downward pressure needs to be controlled. If the electric hammer body 101 is pressed too much, causing the buffer spring 5011 to be over-compressed, the connecting sleeve 401 will slide inside the buffer sleeve 501. The pushing ring 502 will stop and push the protective cylinder 301 to move upward. At this time, the power-off switch 302 will be squeezed by the inclined surface of the squeezing ring groove 2022. The power-off switch 302 can quickly control the power-off protection of the electric hammer body 101. Adjustment needs to be made in time.

[0041] After the overall roughening of the composite plate is completed, water can be drained in real time through the water inlet pipe 203, and the cleaning brush 504 can be attached to the chiseled end face. Then, the electric hammer body 101 is started to efficiently vibrate and brush the chiseled end face of the composite plate for cleaning. When it is necessary to remove the connecting sleeve 401 later, the connecting sleeve 401 can be pulled out directly.

[0042] The following points should be noted in this article:

[0043] 1. The accompanying drawings of the embodiments of the present invention only involve the structures involved in the embodiments of the present invention; other structures can refer to general designs.

[0044] 2. Where there is no conflict, the embodiments of the present invention and the features thereof can be combined with each other to obtain new embodiments.

[0045] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. An electric hammer for chiseling concrete structures, comprising a chiseling part (1), wherein a humidifying protective element (2) is installed on the chiseling part (1); characterized in that: The humidifying protective component (2) is used for humidifying the roughened surface; a roughening control component (3) is installed on the humidifying protective component (2); the roughening control component (3) is used to prevent excessive roughening. The chiseling part (1) is equipped with a root cleaning joint piece (4); the root cleaning joint piece (4) is equipped with a buffer root cleaning piece (5); the buffer root cleaning piece (5) is used to buffer the cleaning of concrete at the root of the reinforcing bar; The chiseling part (1) includes: an electric hammer body (101) and a chisel (102), wherein the output end of the electric hammer body (101) is equipped with a chisel (102); the handle of the electric hammer body (101) is provided with an energizing switch; and the chisel (102) is provided with a sliding groove.

2. The electric hammer for chiseling concrete structures according to claim 1, characterized in that, The chiseling part (1) further includes a docking limiting groove (1021), and the chiseling steel rod (102) is provided with a docking limiting groove (1021).

3. The electric hammer for chiseling concrete structures according to claim 1, characterized in that, The humidification protection component (2) includes: a clamping cover (201), a rubber sheet (2011), and a connecting sleeve (202). There are two clamping covers (201), which are fixedly connected by bolts. The two clamping covers (201) are fixedly clamped on the electric hammer body (101). The ends of the two clamping covers (201) are threaded. A row of rubber sheets (2011) is fixedly installed on the inner side of each of the two clamping covers (201). The inner sides of the two rows of rubber sheets (2011) are in contact with the outer side of the chisel (102). The connecting sleeve (202) is threadedly connected to the two clamping covers (201). The connecting sleeve (202) is located on the outer side of the chisel (102).

4. The electric hammer for chiseling concrete structures according to claim 3, characterized in that, The humidification protection component (2) further includes: a guide key strip (2021), a compression ring groove (2022), a water inlet pipe (203), and a support spring (204). The guide key strip (2021) is fixedly installed on the connecting sleeve (202). The connecting sleeve (202) has a compression ring groove (2022) on its outer side. The water inlet pipe (203) is fixedly installed on the connecting sleeve (202). The support spring (204) is sleeved on the connecting sleeve (202).

5. The electric hammer for chiseling concrete structures according to claim 4, characterized in that, The chiseling control component (3) includes: a protective cylinder (301), which is slidably sleeved on the connecting sleeve (202); the end of the protective cylinder (301) is a beveled structure; a groove is provided on the inner side of the protective cylinder (301), and the guide key (2021) slides in the groove on the inner side of the protective cylinder (301); one end of the support spring (204) is fixedly connected to the protective cylinder (301), and the other end of the support spring (204) is fixedly connected to the connecting sleeve (202).

6. The electric hammer for chiseling concrete structures according to claim 5, characterized in that, The chiseling control component (3) further includes: a power-off switch (302), which is fixedly installed on the protective cylinder (301), and the pressing end of the power-off switch (302) is located in the extrusion ring groove (2022); the power-off switch (302) is electrically connected to the power switch on the handle of the electric hammer body (101).

7. The electric hammer for chiseling concrete structures according to claim 2, characterized in that, The root cleaning and docking component (4) includes: docking sleeve (401) and docking key strip (4011). The docking sleeve (401) is slidably sleeved on the chisel (102). The docking key strip (4011) is fixedly installed on the inner side of the docking sleeve (401), and the docking key strip (4011) slides in the groove on the chisel (102).

8. The electric hammer for chiseling concrete structures according to claim 7, characterized in that, The root-cleaning docking component (4) further includes: a limiting mounting shell (402), a protruding post (403), and a limiting spring (404). The limiting mounting shell (402) is fixedly sleeved on the docking sleeve (401). The protruding post (403) is slidably sleeved on the inner side of the limiting mounting shell (402). The end of the protruding post (403) is inserted into the docking limiting groove (1021). The limiting spring (404) is sleeved on the inner side of the limiting mounting shell (402). One end of the limiting spring (404) is connected to the inner side of the limiting mounting shell (402), and the other end of the limiting spring (404) is fixedly connected to the protruding post (403).

9. The electric hammer for chiseling concrete structures according to claim 7, characterized in that, The buffer sleeve (5) includes: a buffer sleeve (501), a buffer spring (5011), and a push ring (502). The buffer sleeve (501) is slidably sleeved on the docking sleeve (401). The buffer spring (5011) is sleeved inside the buffer sleeve (501). The push ring (502) is fixedly sleeved on the buffer sleeve (501) and the push ring (502) is located in front of the protective cylinder (301). One end of the buffer spring (5011) is fixedly connected to the inside of the buffer sleeve (501), and the other end of the buffer spring (5011) is fixedly connected to the docking sleeve (401).

10. The electric hammer for chiseling concrete structures according to claim 9, characterized in that, The buffer cleaning component (5) further includes: a cleaning tooth block (503) and a cleaning brush (504). The cleaning tooth block (503) is fixedly installed on the buffer sleeve (501) by bolts; the cleaning brush (504) is fixedly installed on the cleaning tooth block (503).

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