Electric pick shock absorbing structure

Abstract

This utility model discloses a shock-absorbing and buffering structure for an electric hammer, including an iron head and a hammer rod. The iron head has a through hole for inserting and connecting a working head. The hammer rod is used to strike the working head inserted into the through hole. The inner wall of the through hole has a front step and a rear step, which are arranged opposite each other. Between the front step and the rear step, there is a front stop sleeve for the working head to abut against when it retracts, a rear stop sleeve for the hammer rod to abut against when it strikes forward, and an elastic shock-absorbing ring supported between the front stop sleeve and the rear stop sleeve. The front end of the front stop sleeve abuts against the front step, and the rear end of the rear stop sleeve abuts against the rear step. This patent can achieve a two-way shock absorption effect for the forward thrust of the hammer rod and the retraction of the working head, improve the user experience, reduce noise during impact, and prevent damage to components caused by the hammer rod directly hitting the iron head, thereby increasing the service life of the machine.

Description

Technical Field

[0001] This utility model relates to an electric pick, and more particularly to a shock-absorbing and buffering structure for an electric pick. Background Technology

[0002] An electric hammer is a tool that removes the working medium by hammering. When it hammers, it generates crushing force through the movement of a piston-driven air hammer to destroy the target object. It is suitable for use with picks or other appropriate accessories, such as chisels and shovels, to break, level, excavate, groove, and cut concrete, masonry structures, and asphalt pavements.

[0003] For example, patent CN211278272U discloses a buffer device installed on an electric hammer, which includes a front cylinder. An iron head is connected to one side of the front cylinder by screws. A cylinder, an impact rod, and an impact hammer are arranged inside the front cylinder. One end of the impact rod is connected to the iron head, and the other end is in contact with the impact hammer. The cylinder is sleeved on the outside of the impact rod and the impact hammer. A buffer washer, a buffer rubber ring, and a buffer seat are sequentially sleeved on the impact rod. One end of the cylinder is sleeved on the outside of the buffer seat and is in contact with the iron head. The buffer washer and the buffer rubber ring are located between the impact rod and the iron head. The impact hammer pushes the impact rod. When the impact rod does not contact the iron head, the impact hammer first hits the buffer seat. The force generated by the impact hammer is effectively buffered by the buffer washer and the buffer rubber ring, which greatly reduces the force of the impact rod hitting the iron head.

[0004] However, the patent does not have a buffer structure between the impact rod and the iron head. When the impact hammer pushes the impact rod forward to impact the working head, the impact rod will directly hit the iron head, which can easily cause damage to the iron head or the impact rod. In addition, the impact will produce a lot of noise and vibration, and the vibration generated by the impact will affect the user experience. Utility Model Content

[0005] Based on the above-mentioned issues, when the impact hammer pushes the impact rod forward to impact the working head, the impact rod will directly hit the iron head, which can easily cause damage to the iron head or the impact rod. In addition, the impact will produce a lot of noise and vibration, and the vibration generated by the impact will affect the user experience. Therefore, this utility model provides a shock-absorbing and buffering structure for an electric pickaxe.

[0006] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a shock-absorbing and buffering structure for an electric pick, including an iron head and a hammer rod. The iron head is provided with a through hole for the insertion and connection of the working head. The hammer rod is used to strike the working head inserted into the through hole. The inner wall of the through hole is provided with a front step and a rear step. The front step and the rear step are arranged opposite to each other. Between the front step and the rear step, there is a front stop sleeve for the working head to abut against when it retracts, a rear stop sleeve for the hammer rod to abut against when it strikes forward, and an elastic shock-absorbing ring supported between the front stop sleeve and the rear stop sleeve. The front end of the front stop sleeve abuts against the front step, and the rear end of the rear stop sleeve abuts against the rear step.

[0007] A further preferred embodiment of this utility model is as follows: an inner ring is protruding on the rear end of the front anti-jet sleeve near the rear anti-jet sleeve, and a shock-absorbing ring is fitted on the inner ring. An outer ring is protruding on the front end of the rear anti-jet sleeve near the front anti-jet sleeve, opposite to the shock-absorbing ring. The front and rear sides of the shock-absorbing ring abut against the rear end face of the front anti-jet sleeve and the outer ring, respectively. There is a gap between the inner ring and the rear anti-jet sleeve for relative movement between the front and rear anti-jet sleeves.

[0008] A further preferred embodiment of this invention is that the outer ring is at least partially fitted around the outside of the inner ring.

[0009] A further preferred technical solution of this utility model is: the rear stop sleeve has an opening and is elastic, and the rear stop sleeve can be compressed by external force to get away from the obstruction of the rear step.

[0010] A further preferred embodiment of this utility model is as follows: the through hole includes a first hole segment, a second hole segment, and a third hole segment arranged sequentially from front to back. The inner diameter of the second hole segment is smaller than the inner diameters of the first hole segment and the third hole segment. A front step is formed between the first hole segment and the second hole segment, and a rear step is formed between the second hole segment and the third hole segment. The outer diameter of the front stop sleeve is smaller than the inner diameter of the third hole segment, and the outer diameter of the front stop sleeve is larger than the inner diameter of the first hole segment.

[0011] A further preferred technical solution of this utility model is as follows: the side wall of the working head is provided with a first abutting step for abutting against the front stop sleeve when retracting to the back position, and the part of the working head located behind the first abutting step passes through the front stop sleeve and the rear stop sleeve to be impacted by the hammer rod.

[0012] A further preferred embodiment of this invention is as follows: An elongated groove is formed along the axial direction on the working head; a receiving hole communicating with the through hole is formed on the outer wall of the iron head; a ball-head pin is placed in the receiving hole; a sliding sleeve is fitted around the outside of the iron head; a high position and a low position are provided on the inner side of the sliding sleeve, with a height difference between the high and low positions; the sliding sleeve can slide back and forth along the iron head, allowing it to change between a first position and a second position; a spring is provided on the iron head to drive the sliding sleeve to move and reset. When the sliding sleeve slides to the first position, the high position is opposite to the ball head pin and blocks the outside of the ball head pin. The ball head pin is inserted into the long groove and locks the working head on the iron head for movement. When the sliding sleeve slides to the second position, the lower position is opposite to the ball head pin, and there is space between the lower position and the outer wall of the iron head for the ball head pin to move outward, so that the ball head pin can disengage from the long groove.

[0013] A further preferred embodiment of this utility model is as follows: a retaining spring is snapped onto the outer wall of the iron head, and a second abutting step is provided on the outer wall of the iron head behind the retaining spring. A front retaining ring and a rear retaining ring are fitted onto the iron head, with the front retaining ring abutting against the retaining spring and the rear retaining ring abutting against the second abutting step. An inner annular protrusion is provided on the inner side of the sliding sleeve, with the inner wall surface of the inner annular protrusion serving as the high position and the inner wall surface of the sliding sleeve serving as the low position. The inner annular protrusion is located between the front and rear retaining rings. A spring is fitted onto the iron head and supported between the rear retaining ring and the inner annular protrusion. In the first position, the inner annular convex edge abuts against the front retaining ring, and the inner annular convex edge surrounds the outside of the receiving hole to prevent the ball head pin from moving outward. In the second position, the inner annular convex edge moves backward from the receiving hole so that the receiving hole is opposite to the inner wall surface of the sliding sleeve.

[0014] A further preferred technical solution of this utility model is as follows: the working head includes a limiting section, the limiting section is a prismatic structure, a long groove is opened on the limiting section, the through hole includes a first hole section, the first hole section is a prismatic hole adapted to the shape of the limiting section, and one end of the receiving hole is opened on the inner wall of the first hole section.

[0015] A further preferred embodiment of this invention is that the shock-absorbing ring is a rubber ring.

[0016] Compared with the prior art, the advantage of this utility model is that a front step and a rear step are provided on the through hole inside the iron head. Between the front step and the rear step, there is a front stop sleeve for the working head to abut against when it retracts, a rear stop sleeve for the hammer rod to abut against when it strikes forward, and an elastic shock-absorbing ring supported between the front stop sleeve and the rear stop sleeve. The front end of the front stop sleeve abuts against the front step, and the rear end of the rear stop sleeve abuts against the rear step. When the hammer rod strikes the working head forward during impact operation, the hammer rod that pushes the working head forward and... When the rear stop sleeve contacts the workpiece, it blocks the hammer rod from moving forward. At the same time, the rear stop sleeve compresses the shock-absorbing ring to buffer the impact of the hammer rod. When the working head impacts the object and returns to its original position, the retracting working head contacts the front stop sleeve. The front stop sleeve blocks the working head from moving backward and compresses the shock-absorbing ring to buffer the impact of the retracting working head. This achieves a two-way shock absorption effect, improves the user experience, reduces noise during impact, and also prevents the hammer rod from directly hitting the iron head, thus avoiding damage to components and increasing the machine's service life. Attached Figure Description

[0017] The present invention will be further described in detail below with reference to the accompanying drawings and preferred embodiments. However, those skilled in the art will understand that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be construed as limiting the scope of the present invention. Furthermore, unless specifically indicated, the drawings are only schematic representations of the composition or structure of the described objects and may contain exaggerated depictions, and the drawings are not necessarily drawn to scale.

[0018] Figure 1 This is a schematic diagram of the cross-section before being hammered by an electric pick. Figure 2 for Figure 1 A magnified view of part A; Figure 3 This is a schematic diagram of the cross-section after being hammered by an electric pick. Figure 4 for Figure 3 A magnified view of section B; Figure 5 This is a schematic diagram of the working head structure; Figure 6 This is a schematic diagram of the iron head structure; Figure 7 This is a schematic diagram of the front stop sleeve. Figure 8 This is a schematic diagram of the structure of the damping ring; Figure 9 This is a schematic diagram of the rear stop sleeve.

[0019] In the diagram: 1. Iron head; 2. Hammer rod; 3. Working head; 4. Third hole section; 5. Second hole section; 6. Second abutment step; 7. Rear retaining ring; 8. Long groove; 9. Spring; 10. Accommodation hole; 11. Ball pin; 12. First hole section; 13. Snap ring; 14. Front retaining ring; 15. Inner annular protrusion; 16. Sliding sleeve; 17. Front anti-blow sleeve; 18. Shock absorber ring; 19. Rear anti-blow sleeve; 20. First abutment step; 21. Outer ring; 22. Rear step; 23. Through hole; 24. Opening; 25. Inner ring; 26. Front step; 27. Working section; 28. Limiting section; 29. ​​Impact section. Detailed Implementation

[0020] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are merely descriptive and exemplary and should not be construed as limiting the scope of protection of the present invention.

[0021] It should be noted that similar labels in the following figures indicate similar items; therefore, once an item is defined in one figure, it may not be further defined and explained in subsequent figures.

[0022] Figures 1-9 As shown, the shock absorption structure of the electric pick includes an iron head 1 and a hammer rod 2. The iron head 1 has a through hole 23 for inserting and connecting the working head 3. The hammer rod 2 is used to strike the working head 3 inserted into the through hole 23 so that the working head 3 can impact the object forward to perform the operation.

[0023] Figure 4As shown, the inner wall of the through hole 23 is provided with a front step 26 and a rear step 22. The front step 26 and the rear step 22 are arranged opposite each other. Between the front step 26 and the rear step 22, there is a front stop sleeve 17 for the working head 3 to abut against when it retracts, a rear stop sleeve 19 for the hammer rod 2 to abut against when it strikes forward, and an elastic shock-absorbing ring 18 supported between the front stop sleeve 17 and the rear stop sleeve 19. The front end of the front stop sleeve 17 abuts against the front step 26, and the rear end of the rear stop sleeve 19 abuts against the rear step 22.

[0024] Figures 1-4 As shown, when the hammer rod 2 strikes the working head 3 forward, the hammer rod 2, which pushes the working head 3 forward, contacts the rear stop sleeve 19. The rear stop sleeve 19 blocks the hammer rod 2 from moving forward further. At the same time, the rear stop sleeve 19 squeezes the shock-absorbing ring 18 to buffer the impact of the hammer rod 2. When the working head 3 strikes the object and returns to its original position, the retracting working head 3 contacts the front stop sleeve 17. The front stop sleeve 17 blocks the working head 3 from moving backward further. At the same time, the front stop sleeve 17 squeezes the shock-absorbing ring 18 to buffer the impact of the retracting working head 3. This achieves a two-way shock absorption effect, improves the user experience, reduces noise during impact, and also prevents the hammer rod 2 from directly striking the iron head 1, thus avoiding damage to components and increasing the machine's service life.

[0025] Preferably, the shock absorber ring 18 is an O-shaped rubber ring.

[0026] Figures 7-9 As shown, the front anti-impact sleeve 17 has an inner ring 25 protruding on its rear end near the rear anti-impact sleeve 19, and the shock absorber 18 is fitted onto the inner ring 25. The rear anti-impact sleeve 19 has an outer ring 21 protruding on its front end near the front anti-impact sleeve 17, which is opposite to the shock absorber 18. The front and rear sides of the shock absorber 18 abut against the rear end face of the front anti-impact sleeve 17 and the outer ring 21, respectively. There is a gap between the inner ring 25 and the rear anti-impact sleeve 19 for relative movement between the front anti-impact sleeve 17 and the rear anti-impact sleeve 19. This structure makes the shock absorber 18 more stably limited between the front anti-impact sleeve 17 and the rear anti-impact sleeve 19.

[0027] The outer ring 21 is at least partially fitted around the outside of the inner ring 25, so that when the front anti-impact sleeve 17 and the rear anti-impact sleeve 19 move relative to each other and compress the shock absorber ring 18, the front anti-impact sleeve 17 and the rear anti-impact sleeve 19 are less likely to collide and affect their relative movement.

[0028] The rear stop sleeve 19 has an opening 24 and is elastic. The rear stop sleeve 19 can be compressed by external force to break away from the obstruction of the rear step 22, so as to install the rear stop sleeve 19 into the iron head 1 or remove it from the iron head 1.

[0029] By squeezing the rear stop sleeve 19 inward, the opening 24 of the rear stop sleeve 19 can close and become smaller after being squeezed. During the process of the opening 24 closing, the outer diameter of the rear stop sleeve 19 gradually becomes smaller due to compression, thereby realizing the installation of the rear stop sleeve 19 into the iron head 1 or the removal of it from the iron head 1.

[0030] The through hole 23 includes a first hole segment 12, a second hole segment 5, and a third hole segment 4 arranged sequentially from front to back. The inner diameter of the second hole segment 5 is smaller than the inner diameters of the first hole segment 12 and the third hole segment 4. A front step 26 is formed between the first hole segment 12 and the second hole segment 5, and a rear step 22 is formed between the second hole segment 5 and the third hole segment 4. The outer diameter of the front anti-blow sleeve 17 is smaller than the inner diameter of the third hole segment 4, and the outer diameter of the front anti-blow sleeve 17 is larger than the inner diameter of the first hole segment 12. The aforementioned rear anti-blow sleeve 19 can reduce its outer diameter by compressing inward, so that the outer diameter of the rear anti-blow sleeve 19 is smaller than the inner diameter of the third hole segment 4, thereby allowing it to be removed from the third hole segment 4. After the rear anti-blow sleeve 19 is removed, the shock absorber ring 18 is deformed and removed. Then, because the outer diameter of the front anti-blow sleeve 17 is smaller than the inner diameter of the third hole segment 4, the front anti-blow sleeve 17 can be directly removed from the third hole segment 4.

[0031] When the front anti-blow sleeve 17, the shock absorber ring 18, and the rear anti-blow sleeve 19 are installed between the front step 26 and the rear step 22, the outer wall of the shock absorber ring 18 fits against the inner wall of the second hole section 5. When the inner ring 25 on the front anti-blow sleeve 17 is inserted into the shock absorber ring 18, the shock absorber ring 18 can support the front anti-blow sleeve 17, and the rear anti-blow sleeve 19 is opened so that its outer wall fits against the inner wall of the second hole section 5.

[0032] The side wall of the working head 3 is provided with a first abutting step 20 for abutting against the front stop sleeve 17 when retracting to the back position. The part of the working head 3 located behind the first abutting step 20 passes through the front stop sleeve 17 and the rear stop sleeve 19 to be impacted by the hammer rod 2.

[0033] The working head 3 has an axially oriented long groove 8. The outer wall of the iron head 1 has a receiving hole 10 that communicates with the through hole 23. A ball head pin 11 is placed in the receiving hole 10. The width of the opening at the inner end of the receiving hole 10 that communicates with the through hole 23 is less than the maximum width of the ball head pin 11 to prevent the ball head pin 11 from falling entirely into the through hole 23 from the receiving hole 10. The width of the opening at the outer end of the receiving hole 10 is greater than the maximum width of the ball head pin 11 for inserting or removing the ball head pin 11.

[0034] The iron head 1 is fitted with a sliding sleeve 16. The inner side of the sliding sleeve 16 is provided with a high position and a low position, and there is a height difference between the high position and the low position. The sliding sleeve 16 can slide back and forth along the iron head 1 so that the sliding sleeve 16 can change between a first position and a second position. The iron head 1 is provided with a spring 9 for driving the sliding sleeve 16 to move and reset.

[0035] When the sliding sleeve 16 slides to the first position, the high position is opposite to the ball head pin 11 and blocks the outside of the ball head pin 11. The ball head pin 11 is inserted into the long groove 8 and locks the working head 3 on the iron head 1. When the sliding sleeve 16 slides to the second position, the low position is opposite to the ball head pin 11. There is space between the low position and the outer wall of the iron head 1 for the ball head pin 11 to move outward, so that the ball head pin 11 can be disengaged from the long groove 8.

[0036] This structure facilitates the quick assembly and disassembly of the working head 3.

[0037] A retaining ring 13 is snapped onto the outer wall of the iron head 1. A second abutting step 6 is provided on the outer wall of the iron head 1, located behind the retaining ring 13. A front retaining ring 14 and a rear retaining ring 7 are fitted on the iron head 1. The front retaining ring 14 abuts against the retaining ring 13, and the rear retaining ring 7 abuts against the second step. An inner annular protrusion 15 is provided on the inner side of the sliding sleeve 16. The inner wall surface of the inner annular protrusion 15 is the high position, and the inner wall surface of the sliding sleeve 16 is the low position. The inner annular protrusion 15 is located between the front retaining ring 14 and the rear retaining ring 7. A spring 9 is fitted on the iron head 1 and supported between the rear retaining ring 7 and the inner annular protrusion 15.

[0038] In the first position, the inner annular protrusion 15 abuts against the front retaining ring 14, and the inner annular protrusion 15 surrounds the outside of the receiving hole 10 to prevent the ball head pin 11 from moving outward; in the second position, the inner annular protrusion 15 moves backward from the receiving hole 10 so that the receiving hole 10 is opposite to the inner wall surface of the sliding sleeve 16.

[0039] The clamping principle of the working head 3 is as follows: Before clamping, slide the sliding sleeve 16 backward to the second position so that the inner annular protrusion 15 moves away from the outside of the receiving hole 10. At this time, the ball head pin 11, which is partially protruding from the inner wall of the through hole 23, can move outward and be completely retracted into the receiving hole 10. Insert one end of the working head 3 into the through hole 23, so that the long groove 8 moves to the position opposite to the receiving hole 10. Release the sliding sleeve 16, and the spring 9 pushes the sliding sleeve 16 forward so that the inner annular protrusion 15 abuts against the front retaining ring 14. At this time, the sliding sleeve 16 is in the first position. During the forward movement of the sliding sleeve 16, the inner annular protrusion 15 squeezes the ball head pin 11, so that... The ball head pin 11 moves into the through hole 23 and engages in the long groove 8, thus locking the working head 3. At the same time, the inner annular protrusion 15 blocks the outside of the receiving hole 10 so that the ball head pin 11 can remain engaged in the long groove 8. The working head 3 can move back and forth relative to the iron head 1 through the sliding engagement between the long groove 8 and the ball head pin 11. Before disassembly, the sliding sleeve 16 is slid backward to the second position so that the inner annular protrusion 15 is removed from the outside of the receiving hole 10. At this time, the ball head pin 11 engaged in the long groove 8 can move outward and disengage from the long groove 8, releasing the lock on the working head 3. The user can then pull the working head 3 outward.

[0040] The aforementioned sliding sleeve 16 is always fitted outside the rear retaining ring 7 during the back-and-forth sliding process. The rear retaining ring 7 can prevent stones from entering the position between the rear retaining ring 7 and the inner annular convex edge 15.

[0041] Figure 5 , Figure 6 As shown, the working head 3 includes a limiting section 28, a working section 27 located in front of the limiting section 28, and a receiving section 29 located behind the limiting section 28. The limiting section 28 has a prismatic structure, and a long groove 8 is opened on the limiting section 28. The first hole section 12 is fitted with the limiting section 28. The inner wall surface of the first hole section 12 is uniformly provided with cross-sections along the circumference so that the first hole section 12 is a prismatic hole that matches the shape of the limiting section 28. One end of the receiving hole 10 is opened on the inner wall of the first hole section 12.

[0042] The first hole section 12 cooperates with the limiting section 28 to restrict the rotation of the inserted working head 3 relative to the iron head 1.

[0043] The shock-absorbing and buffering structure of the electric pick provided by this utility model has been introduced above. Specific examples have been used to illustrate the principle and implementation of this utility model. The description of the above embodiments is only for the purpose of helping to understand this utility model and its core ideas. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A shock-absorbing and buffering structure for an electric pick, comprising a metal head and a hammer rod, wherein the metal head has a through hole for inserting and connecting a working head, and the hammer rod is used to strike the working head inserted into the through hole, characterized in that, The inner wall of the through hole is provided with a front step and a rear step, which are arranged opposite each other. Between the front step and the rear step, there is a front stop sleeve for the working head to abut against when it retracts, a rear stop sleeve for the hammer rod to abut against when it strikes forward, and an elastic shock-absorbing ring supported between the front stop sleeve and the rear stop sleeve. The front end of the front stop sleeve abuts against the front step, and the rear end of the rear stop sleeve abuts against the rear step.

2. The shock-absorbing and buffering structure of the electric pick as described in claim 1, characterized in that, The front anti-jet sleeve has an inner ring protruding at the rear end near the rear anti-jet sleeve, and the shock absorber ring is fitted on the inner ring. The rear anti-jet sleeve has an outer ring protruding at the front end near the front anti-jet sleeve, which is opposite to the shock absorber ring. The front and rear sides of the shock absorber ring abut against the rear end face of the front anti-jet sleeve and the outer ring ring, respectively. There is a gap between the inner ring and the rear anti-jet sleeve for relative movement between the front and rear anti-jet sleeves.

3. The shock-absorbing and buffering structure of the electric pick as described in claim 2, characterized in that, The outer ring is at least partially fitted over the inner ring.

4. The shock-absorbing and buffering structure of the electric pick as described in claim 1, characterized in that, The rear stop sleeve has an opening and is elastic, and the rear stop sleeve can be compressed by external force to get away from the obstruction of the rear step.

5. The shock-absorbing and buffering structure of the electric pick as described in claim 4, characterized in that, The through hole includes a first hole segment, a second hole segment, and a third hole segment arranged sequentially from front to back. The inner diameter of the second hole segment is smaller than the inner diameters of the first hole segment and the third hole segment. A front step is formed between the first hole segment and the second hole segment, and a rear step is formed between the second hole segment and the third hole segment. The outer diameter of the front stop sleeve is smaller than the inner diameter of the third hole segment, and the outer diameter of the front stop sleeve is larger than the inner diameter of the first hole segment.

6. The shock-absorbing and buffering structure of the electric pick as described in claim 1, characterized in that, The working head has a first abutting step on its side wall for abutting against the front stop sleeve when it retracts to the back position. The part of the working head located behind the first abutting step passes through the front stop sleeve and the rear stop sleeve to be impacted by the hammer rod.

7. The shock-absorbing and buffering structure of the electric pick as described in claim 1, characterized in that, The working head has an axially spaced long groove, and the outer wall of the iron head has a receiving hole communicating with the through hole. A ball-head pin is placed in the receiving hole. A sliding sleeve is fitted around the iron head, and the inner side of the sliding sleeve has a high position and a low position with a height difference between them. The sliding sleeve can slide back and forth along the iron head, so that the sliding sleeve can change between a first position and a second position. The iron head is equipped with a spring to drive the sliding sleeve to move and return to its original position. When the sliding sleeve slides to the first position, the high position is opposite to the ball head pin and blocks the outside of the ball head pin. The ball head pin is inserted into the long groove and locks the working head on the iron head for movement. When the sliding sleeve slides to the second position, the lower position is opposite to the ball head pin, and there is space between the lower position and the outer wall of the iron head for the ball head pin to move outward, so that the ball head pin can be disengaged from the long groove.

8. The shock-absorbing and buffering structure of the electric pick as described in claim 7, characterized in that, A retaining spring is snapped onto the outer wall of the iron head. A second abutting step is provided on the outer wall of the iron head, located behind the retaining spring. A front retaining ring and a rear retaining ring are fitted onto the iron head. The front retaining ring abuts against the retaining spring, and the rear retaining ring abuts against the second abutting step. An inner annular protrusion is provided on the inner side of the sliding sleeve. The inner wall surface of the inner annular protrusion is the higher position, and the inner wall surface of the sliding sleeve is the lower position. The inner annular protrusion is located between the front retaining ring and the rear retaining ring. A spring is fitted onto the iron head and supported between the rear retaining ring and the inner annular protrusion. In the first position, the inner annular convex edge abuts against the front retaining ring, and the inner annular convex edge surrounds the outside of the receiving hole to prevent the ball head pin from moving outward. In the second position, the inner annular convex edge moves backward from the receiving hole so that the receiving hole is opposite to the inner wall surface of the sliding sleeve.

9. The shock-absorbing and buffering structure of the electric pick as described in claim 7, characterized in that, The working head includes a limiting section, which is a prismatic structure with a long groove formed on it. The through hole includes a first hole section, which is a prismatic hole adapted to the shape of the limiting section. One end of the receiving hole is formed on the inner wall of the first hole section.

10. The shock-absorbing and buffering structure of the electric pick as described in claim 1, characterized in that, The shock-absorbing ring is a rubber ring.

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