Air pick

Abstract

The utility model relates to an air pick which comprises a pick barrel, an inner cavity is formed in the middle of the pick barrel, a hammer body matched with the inner cavity in a sliding mode is arranged in the inner cavity, and the inner cavity comprises a movable cavity used for allowing the hammer body to move and an air inlet cavity used for air inlet. A first air hole communicated with the outside and a second air hole located on the adjacent side of the first air hole are formed in the side wall of the movable cavity, and the first air hole and the second air hole are distributed in the axis direction of the pickaxe barrel. The utility model has the characteristics that the exhaust speed can be increased when the hammer body moves, the impact speed and the impact frequency of the hammer body are improved, and the like.

Description

Technical Field

[0001] The utility model relates to a pneumatic pick and belongs to the technical field of pneumatic picks. Background Art

[0002] A pneumatic pick is a handheld construction tool that uses compressed air as its power to break hard objects using impact.

[0003] The hammer of a conventional pneumatic pick slides in the inner cavity of the pick barrel. When the hammer in the pick barrel drives the pick to move, that is, when the pneumatic pick is in use, the gas in front of the hammer will be compressed. As the hammer continues to move forward, the compressed air will enter the inner cavity of the pick barrel. Since the gap between the front end of the hammer and the inner cavity wall is extremely small, the air pressure in the inner cavity at the front end of the hammer will become greater and greater. When the pneumatic pick is held by the user to crush concrete, since the pneumatic pick is supported on the concrete, it is affected by the high pressure in the inner cavity, and the entire pneumatic pick will move upward, generating a huge recoil force. It is difficult for the user to hold the pneumatic pick stably, and it may even cause injury to the user.

[0004] In the prior art, the impact speed of the pick driven by the hammer in the pick barrel is affected by the air intake speed and exhaust speed in the inner cavity of the pick barrel. In order to increase the impact speed of the pick driven by the pick in the pneumatic pick to improve the impact crushing efficiency, it is necessary to increase the air intake speed and exhaust speed in the inner cavity of the pick barrel. Utility Model Content

[0005] The utility model aims to provide a pneumatic pick with faster impact speed and higher crushing efficiency.

[0006] The above-mentioned technical purpose of the utility model is mainly solved by the following technical solutions: a pneumatic pick, comprising a pick barrel, an inner cavity is provided in the middle of the pick barrel, a hammer body slidably matched with the inner cavity is provided in the inner cavity, the inner cavity comprises an active cavity for the movement of the hammer body and an air intake cavity for air intake, a first air hole connected to the outside and a second air hole located adjacent to the first air hole are provided on the side wall of the active cavity, the first air hole and the second air hole are distributed along the axis direction of the pick barrel; in order to increase the air intake speed and exhaust speed of the inner cavity of the pick barrel, under the premise of ensuring the quality of the pneumatic pick, it is necessary to lengthen the overall length of the hammer body and the pick barrel and reduce the diameter of the hammer body and the inner cavity, so as to increase the impact speed of the hammer body and improve the breakage efficiency, and then it is necessary to set the first air hole and the second air hole to increase the exhaust speed when the hammer body is active, so as to ensure the normal impact movement of the hammer body and increase the impact speed and impact frequency of the hammer body.

[0007] Preferably, an air passage is provided on the side wall of the pick barrel along the axial direction of the pick barrel, and the first air hole and the second air hole connect the air passage and the inner cavity; the setting of the above-mentioned air passage can be connected with the inner cavity through the first air hole and the second air hole, thereby increasing the change of exhaust direction and exhaust guidance, improving exhaust efficiency, and avoiding damage to the human body caused by the impact of the exhausted gas, and increasing the exhaust speed through the first air hole and the second air hole.

[0008] Preferably, the side wall of the pick barrel is provided with an air passage arranged along the axial direction of the pick barrel, and the first air hole and the second air hole are arranged on the side wall of the pick barrel corresponding to the adjacent side of the air passage; the setting of the above-mentioned air passage increases the change of exhaust direction and exhaust guidance, improves exhaust efficiency, and avoids the exhaust gas from impacting the human body and causing damage. At the same time, through the setting of the first air hole and the second air hole, the gas in the inner cavity is guided to be directly discharged from the pick barrel, thereby improving the exhaust speed.

[0009] Preferably, when the jackhammer is used to move the hammer to a limit distance away from the air inlet chamber, the first air hole is blocked by the side wall of the hammer; when the above-mentioned first air hole is blocked by the side wall of the hammer, the hammer can be vented through the second air hole, so that the hammer can move back to the air inlet chamber after impact, so as to continue the impact action and ensure the stability of the air pressure on the hammer.

[0010] Preferably, when the pneumatic pick is used to move the hammer to the limit distance in the direction of the air inlet chamber, the second air hole is blocked by the side wall of the hammer; when the above-mentioned second air hole is blocked, the hammer can be vented through the first air hole, so that the hammer can be squeezed by the gas to drive the pick to impact outward, and ensure the stability of the air pressure on the hammer.

[0011] Preferably, the maximum diameter of the hammer is between 35.97-35.95 mm, and the length of the hammer is 135 mm±0.1 mm; the maximum diameter of the hammer is between 35.97-35.95 mm, and the length of the hammer is 135 mm±0.1 mm, so as to reduce the maximum diameter and length of the hammer and reserve the allowable gap and tolerance between the hammer and the active cavity, so as to ensure that the hammer can stably achieve the impact effect and obtain a faster impact speed.

[0012] Therefore, the utility model has the characteristics of increasing the exhaust speed when the hammer is active, and improving the impact speed and impact frequency of the hammer. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the first embodiment of the present utility model.

[0014] Figure 2 yes Figure 1 Schematic diagram of the structure when the hammer returns to its original position.

[0015] Figure 3 It is a structural schematic diagram of the second embodiment of the present utility model.

[0016] Figure 4 yes Figure 3 Schematic diagram of the structure when the hammer returns to its original position. DETAILED DESCRIPTION

[0017] The technical solution of the utility model is further specifically described below through embodiments and in conjunction with the accompanying drawings.

[0018] Embodiment 1:

[0019] like Figure 1-2 As shown, a pneumatic pick comprises a pick barrel 1, an inner cavity 11 is provided in the middle of the pick barrel 1, a hammer body 2 which is slidably matched with the inner cavity 11 is provided in the inner cavity 11, the inner cavity 11 comprises an active cavity 111 for the movement of the hammer body 2 and an air intake cavity 112 for air intake, a first air hole 13 communicating with the outside and a second air hole 14 located adjacent to the first air hole 13 are provided on the side wall of the active cavity 111, the first air hole 13 and the second air hole 14 are distributed along the axial direction of the pick barrel 1, an air passage 12 arranged along the axial direction of the pick barrel 1 is provided on the side wall of the pick barrel 1, the first air hole 13 and the second air hole 14 connect the air passage 12 and the inner cavity 11, the maximum diameter of the hammer body 2 is 35.96㎜, the fitting clearance between the hammer body and the inner wall of the active cavity is 0.04mm, and the length of the hammer body 2 is 135mm.

[0020] An inner cavity for the sliding of the hammer and the flow of gas is arranged in the middle of the pickaxe barrel, the movable cavity and the air intake cavity are connected to each other, the side wall of the hammer body and the inner wall of the movable cavity are matched with each other and a matching gap is left. The maximum diameter and length of the hammer body as a whole are smaller than those of the prior art. The maximum diameter and length of the hammer body are reduced while maintaining the mass unchanged, so that the inner cavity is more slender, thereby obtaining a faster air intake speed to increase the impact speed of the hammer body. The setting of the first air hole and the second air hole can ensure the normal, smooth and stable exhaust when the hammer body slides, and the first air hole and the second air hole are connected to the outside world through the air passage, thereby promoting the exhaust efficiency.

[0021] When the hammer body slides toward the outside to impact, one end of the hammer body is connected to the pick of the pneumatic pick, and the other end of the hammer body is located in the active cavity facing the air inlet cavity, and blocks the first air hole and the end face is located between the first air hole and the second air hole. When the hammer body completes a single impact and moves back to reset, one end of the hammer body is close to the air inlet cavity, and the other end of the hammer body is located between the first air hole and the second air hole and blocks the second air hole. This reciprocating process forms an impact action of the hammer body and the pick, and while the total weight of the pneumatic pick remains unchanged, the impact speed and impact frequency of the hammer body are increased by changing the diameter and length of the hammer body, thereby improving the impact efficiency of the pneumatic pick.

[0022] like Figure 1-2As shown, when the pneumatic pick is used to move the hammer body 2 to the limit distance in the direction away from the air inlet chamber 112, the first air hole 13 is blocked by the side wall of the hammer body 2; when the pneumatic pick is used to move the hammer body 2 to the limit distance in the direction of the air inlet chamber 112, the second air hole 14 is blocked by the side wall of the hammer body 2; during the impact action of the pneumatic pick, the hammer body reciprocates in the active chamber, blocking the first air hole and the second air hole respectively to perform a stable impact action.

[0023] Embodiment 2:

[0024] like Figure 3-4 As shown, an air passage 12 arranged along the axial direction of the pick tube 1 is provided on the side wall of the pick tube 1, and a first air hole 13 and a second air hole 14 are arranged on the side wall of the pick tube 1 corresponding to the adjacent side of the air passage 12.

[0025] When the hammer body slides toward the outside to impact, one end of the hammer body is connected to the pick of the pneumatic pick, and the other end of the hammer body is located in the active cavity facing the air inlet cavity, and blocks the first air hole and the end face is located between the first air hole and the second air hole. At this time, the air passage is shortened, and when the hammer body completes a single impact and moves back to reset, one end of the hammer body is close to the air inlet cavity, and the other end of the hammer body is located between the first air hole and the second air hole and blocks the second air hole. This reciprocating process forms an impact action of the hammer body and the pick, and while the total weight of the pneumatic pick remains unchanged, the impact speed and impact frequency of the hammer body are increased by changing the diameter and length of the hammer body, thereby improving the impact efficiency of the pneumatic pick.

[0026] The other structures of this embodiment are consistent with those of the first embodiment and will not be described in detail here.

Claims

1. A pneumatic pick, characterized in that: The invention comprises a pick barrel (1), wherein an inner cavity (11) is provided in the middle of the pick barrel (1), wherein a hammer body (2) which is slidably matched with the inner cavity (11) is provided in the inner cavity (11), wherein the inner cavity (11) comprises an active cavity (111) for movement of the hammer body (2) and an air intake cavity (112) for air intake, wherein a first air hole (13) communicating with the outside and a second air hole (14) located adjacent to the first air hole (13) are provided on a side wall of the active cavity (111), wherein the first air hole (13) and the second air hole (14) are distributed along the axial direction of the pick barrel (1).

2. The pneumatic pick according to claim 1, characterized in that: An air passage (12) is provided on the side wall of the pick barrel (1) and is arranged along the axial direction of the pick barrel (1), and the first air hole (13) and the second air hole (14) are connected to the air passage (12) and the inner cavity (11).

3. The pneumatic pick according to claim 1, characterized in that: The side wall of the pick barrel (1) is provided with an air passage (12) arranged along the axial direction of the pick barrel (1), and the first air hole (13) and the second air hole (14) are arranged on the side wall of the pick barrel (1) corresponding to the adjacent side of the air passage (12).

4. The pneumatic pick according to claim 2 or 3, characterized in that: When the jackhammer is used to move the hammer body (2) to a limit distance in a direction away from the air inlet chamber (112), the first air hole (13) is blocked by the side wall of the hammer body (2).

5. The pneumatic pick according to claim 2 or 3, characterized in that: When the jackhammer is used to move the hammer body (2) to a limit distance in the direction of the air inlet chamber (112), the second air hole (14) is blocked by the side wall of the hammer body (2).

6. The pneumatic pick according to claim 1, characterized in that: The maximum diameter of the hammer body (2) is between 35.97 mm and 35.95 mm, and the length of the hammer body (2) is 135 mm ± 0.1 mm.

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