Improved pick

Abstract

The utility model belongs to pneumatic tool technical field provides an improved type pneumatic pick, including pick body and the seal sleeve of pick body outside top slide setting, the inner wall of seal sleeve and pick body outer wall cooperation constitutes pneumatic damping chamber, the top of pick body one side is provided with the air inlet pipe, the bottom of pick body other side is provided with the air outlet pipe, the air outlet pipe top and pneumatic damping chamber between intercommunication has the shunt air guide pipe, the utility model discloses a seal sleeve and pick body cooperation form the pneumatic damping chamber of setting, and set up between the shock attenuation connecting assembly of handle and pick body, utilize first spring and second spring can bidirectional absorption pick body operation when produced's impact and vibration, pneumatic damping chamber ingeniously utilized pick body to discharge part exhaust gas to form pneumatic buffer, and its damping characteristic effectively avoided the resonance and the problem of rebound too fast that simple spring shock attenuation easily produced, also overcomeed the defect that simple rubber shock absorption was not good to low frequency strong vibration absorption.

Description

Technical Field

[0001] This utility model belongs to the field of pneumatic tool technology, specifically an improved pneumatic pick. Background Technology

[0002] A pneumatic pick (also known as an air pick or pneumatic pick drill bit) is a handheld pneumatic tool that uses compressed air as power and the high-speed reciprocating motion of a piston to impact a drill rod to break up hard objects such as rocks and concrete.

[0003] When existing pneumatic picks are in operation, the high-frequency and violent impact of the piston on the chisel generates a huge reaction force. This reaction force (i.e., vibration) is directly transmitted to the operator's handle through the pick body. Prolonged operation of a pneumatic pick with high vibration can not only cause the operator to be easily fatigued and reduce work efficiency, but also cause serious occupational diseases such as "arm vibration syndrome".

[0004] Currently, some improved pneumatic picks mainly achieve passive vibration reduction by adding rubber pads or springs between the handle and the pick body. However, simple rubber damping has limited absorption effect on low-frequency strong vibrations, while simple spring damping is prone to resonance or excessively fast rebound, resulting in decreased maneuverability.

[0005] Therefore, those skilled in the art have proposed an improved pneumatic pick to address the problems raised in the background art. Utility Model Content

[0006] To solve the above-mentioned technical problems, this utility model provides an improved pneumatic pick.

[0007] An improved pneumatic pick includes a pick body and a sealing sleeve slidably disposed on the top outer side of the pick body. The inner wall of the sealing sleeve and the outer wall of the pick body cooperate to form a pneumatic damping cavity. An air inlet pipe is provided at the top of one side of the pick body, and an air outlet pipe is provided at the bottom of the other side of the pick body. A diversion air pipe is connected between the top of the air outlet pipe and the pneumatic damping cavity. A one-way valve is provided inside the diversion air pipe. Handles are provided on both sides of the sealing sleeve, and shock-absorbing connection assemblies are provided between the two handles and the pick body.

[0008] Preferably, the shock-absorbing connection assembly includes a connecting shaft, a baffle plate, a first spring, a second spring, a limiting ring, and a connecting rod. The connecting shaft is vertically arranged at the bottom of the handle, and the baffle plate is arranged at the bottom end of the connecting shaft. Connecting rods located below the handle are connected to the middle of both sides of the pick body. One end of the connecting rod is connected to a limiting ring that is slidably sleeved on the outside of the connecting shaft. The first spring abuts against the limiting ring and the handle, and the second spring abuts against the limiting ring and the baffle plate.

[0009] Preferably, the first spring and the second spring are both sleeved on the outside of the connecting shaft, and the first spring and the second spring are used to absorb the impact and vibration of the pick body in two opposite axial directions, respectively.

[0010] Preferably, both ends of the connecting shaft are provided with threaded connection parts, and the handle and the baffle are provided with threaded grooves that are adapted to the threaded connection parts on opposite sides.

[0011] Preferably, a connecting plate is provided at the top of the pick body, the connecting plate being used to prevent the pick body from detaching from the pneumatic damping cavity.

[0012] Preferably, the sealing sleeve is connected to an exhaust pipe, and an exhaust regulating valve is provided in the middle of the exhaust pipe.

[0013] Compared with the prior art, the present invention has the following advantages: by setting a pneumatic damping cavity formed by the cooperation of the sealing sleeve and the pick body, and a shock-absorbing connection assembly set between the handle and the pick body, the first spring and the second spring in the shock-absorbing connection assembly can absorb the impact and vibration generated during the operation of the pick body in both directions; at the same time, the pneumatic damping cavity cleverly utilizes part of the exhaust gas discharged from the pick body to form a pneumatic buffer, and its damping characteristics effectively avoid the resonance and excessively fast rebound problems that are easily generated by simple spring shock absorption, and also overcome the defect of simple rubber shock absorption that is not good at absorbing low-frequency strong vibrations. Attached Figure Description

[0014] Figure 1 This is the main view of the present invention. Figure 2 This is a rear view structural diagram of the present invention; Figure 3 This is a side sectional view of the sealing sleeve of this utility model; Figure 4 This is a structural diagram of the shock-absorbing connection component of this utility model.

[0015] In the picture: 1. Pick body; 11. Inlet pipe; 12. Outlet pipe; 13. Connecting plate; 2. Sealing sleeve; 21. Exhaust pipe; 211. Exhaust regulating valve; 3. Pneumatic damping chamber; 4. Diverting air pipe; 41. One-way valve; 5. Handle; 6. Shock-absorbing connecting assembly; 61. Connecting shaft; 611. Threaded connection part; 62. Baffle; 63. First spring; 64. Second spring; 65. Limiting ring; 66. Connecting rod; 7. Threaded groove. Detailed Implementation

[0016] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0017] As attached Figure 1To be continued Figure 4 As shown: This utility model provides an improved pneumatic pick, including a pick body 1 and a sealing sleeve 2 slidably disposed on the top of the outer side of the pick body 1. The inner wall of the sealing sleeve 2 and the outer wall of the pick body 1 cooperate to form a pneumatic damping cavity 3. An air inlet pipe 11 is provided on the top of one side of the pick body 1, and an air outlet pipe 12 is provided on the bottom of the other side of the pick body 1. A diversion air pipe 4 is connected between the top of the air outlet pipe 12 and the pneumatic damping cavity 3. A one-way valve 41 is provided inside the diversion air pipe 4. Handles 5 are provided on both sides of the sealing sleeve 2, and shock-absorbing connection components 6 are provided between the two handles 5 and the pick body 1.

[0018] Among them, the diversion air tube 4 is a flexible hose, which can bend and extend freely when the pick body 1 and the sealing sleeve 2 move relative to each other.

[0019] It should be noted that a pneumatic piston assembly (not shown in the figure, but a conventional structure in the art) is provided inside the pick body 1. Compressed air enters the interior of the pick body 1 from the air inlet pipe 11, driving the piston to perform high-frequency reciprocating motion. During the piston's motion, the gas is periodically compressed and expanded in the piston chamber inside the pick body, thereby converting the air pressure energy into mechanical impact force.

[0020] refer to Figure 1 and Figure 4 The shock-absorbing connection assembly 6 includes a connecting shaft 61, a baffle 62, a first spring 63, a second spring 64, a limiting ring 65, and a connecting rod 66. The connecting shaft 61 is vertically arranged at the bottom of the handle 5, and the baffle 62 is arranged at the bottom end of the connecting shaft 61. The connecting rod 66 located below the handle 5 is connected to the middle of both sides of the pick body 1. One end of the connecting rod 66 is connected to a limiting ring 65 that is slidably sleeved on the outside of the connecting shaft 61. The first spring 63 abuts between the limiting ring 65 and the handle 5, and the second spring 64 abuts between the limiting ring 65 and the baffle 62.

[0021] The pick 1 can slide axially on the connecting shaft 61 fixed to the handle 5 by cooperating with the connecting rod 66 and the limiting ring 65. The first spring 63 and the second spring 64 are located on the upper and lower sides of the limiting ring 65, respectively, to buffer the displacement of the pick 1 in two directions, thereby achieving bidirectional mechanical shock absorption.

[0022] refer to Figure 1 The first spring 63 and the second spring 64 are both sleeved on the outside of the connecting shaft 61. The first spring 63 and the second spring 64 are used to absorb the impact and vibration of the pick body 1 in two opposite axial directions, respectively.

[0023] In this design, by fitting the first spring 63 and the second spring 64 onto the outside of the connecting shaft 61, the structure of the shock-absorbing assembly becomes more compact and the force distribution is more uniform and stable.

[0024] refer to Figure 4 Both ends of the connecting shaft 61 are provided with threaded connection parts 611, and the handle 5 and the baffle 62 are provided with threaded grooves 7 that are adapted to the threaded connection parts 611 on the opposite side.

[0025] The threaded connection 611 and the threaded groove 7 make it easy to disassemble the baffle 62 and the connecting shaft 61 one by one, thereby facilitating the replacement of the first spring 63 and the second spring 64 with different elastic forces.

[0026] refer to Figure 3 A connecting plate 13 is provided at the top of the pick body 1. The connecting plate 13 is used to prevent the pick body 1 from detaching from the pneumatic damping cavity 3.

[0027] The connecting disc 13 is larger than the end cap through hole of the sealing sleeve 2, thus acting as a mechanical stop to ensure that the pick body 1 is always confined within the predetermined stroke of the sealing sleeve 2 and to prevent it from coming out.

[0028] refer to Figure 3 The sealing sleeve 2 is connected to an exhaust pipe 21, and an exhaust regulating valve 211 is provided in the middle of the exhaust pipe 21.

[0029] The damping chamber exhausts gas through the exhaust pipe 21, and the throttling degree of the channel is controlled by the exhaust regulating valve 211. When the exhaust regulating valve 211 is closed, the exhaust of the pneumatic damping chamber 3 is slower, the internal pressure accumulates higher, and the pneumatic damping force is enhanced. Conversely, it is weakened when the valve is open. This allows the pneumatic hammer to flexibly adapt to different working conditions and operator preferences.

[0030] Working principle: When the pneumatic hammer is working, compressed air enters the hammer body 1 through the air inlet pipe 11, driving the pneumatic piston to perform high-frequency reciprocating impact. The hammer body 1 is slidably connected to the connecting shaft 61 fixed on the handle 5 through the connecting rod 66 and the limiting ring 65. The axial vibration of the hammer body 1 will cause the limiting ring 65 to slide on the connecting shaft 61, and bidirectionally compress the first spring 63 above it or the second spring 64 below it, thereby achieving basic mechanical buffering. At the same time, part of the exhaust gas discharged from the hammer body 1 is diverted through the diversion air pipe 4 and the one-way air intake pipe. Valve 41 is introduced into the pneumatic damping cavity 3 formed by the sealing sleeve 2 and the pick body 1. When the pick body 1 is impacted by the reaction force, it compresses the gas in this cavity while compressing the first spring 63 or the second spring 64, forming a pneumatic damping air cushion. This pneumatic damping works in conjunction with the mechanical spring to effectively absorb high-frequency impacts and suppress the resonance and excessive rebound that are easily generated by a simple spring. At the same time, the operator can also control the exhaust rate of the damping cavity by adjusting the exhaust regulating valve 211 on the sealing sleeve 2 to adapt to different working conditions.

[0031] The embodiments of this utility model are given for the purpose of illustration and description. Although embodiments of this utility model have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the utility model. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this utility model, which is defined by the appended claims and their equivalents.

Claims

1. An improved pneumatic pick, characterized in that, The device includes a pick body (1) and a sealing sleeve (2) that is slidably disposed on the top of the outside of the pick body (1). The inner wall of the sealing sleeve (2) and the outer wall of the pick body (1) cooperate to form a pneumatic damping cavity (3). An air inlet pipe (11) is provided on the top of one side of the pick body (1), and an air outlet pipe (12) is provided on the bottom of the other side of the pick body (1). A diversion air pipe (4) is connected between the top of the air outlet pipe (12) and the pneumatic damping cavity (3). A one-way valve (41) is provided inside the diversion air pipe (4). Handles (5) are provided on both sides of the sealing sleeve (2), and shock-absorbing connection components (6) are provided between the two handles (5) and the pick body (1).

2. The improved pneumatic pick according to claim 1, characterized in that: The shock-absorbing connection assembly (6) includes a connecting shaft (61), a baffle (62), a first spring (63), a second spring (64), a limiting ring (65), and a connecting rod (66). The bottom of the handle (5) is vertically provided with a connecting shaft (61), and the bottom end of the connecting shaft (61) is provided with a baffle (62). The middle of both sides of the pick body (1) is connected with a connecting rod (66) located below the handle (5). One end of the connecting rod (66) is connected with a limiting ring (65) that is slidably sleeved on the outside of the connecting shaft (61). The first spring (63) abuts between the limiting ring (65) and the handle (5), and the second spring (64) abuts between the limiting ring (65) and the baffle (62).

3. The improved pneumatic pick according to claim 2, characterized in that: The first spring (63) and the second spring (64) are both sleeved on the outside of the connecting shaft (61). The first spring (63) and the second spring (64) are used to absorb the impact and vibration of the pick body (1) in two opposite axial directions.

4. The improved pneumatic pick according to claim 2, characterized in that: Both ends of the connecting shaft (61) are provided with threaded connection parts (611), and the handle (5) and the baffle (62) are provided with threaded grooves (7) that are adapted to the threaded connection parts (611) on opposite sides.

5. An improved pneumatic pick according to claim 1, characterized in that: The top of the pick (1) is provided with a connecting plate (13), which is used to prevent the pick (1) from detaching from the pneumatic damping cavity (3).

6. The improved pneumatic pick according to claim 1, characterized in that: The sealing sleeve (2) is connected to an exhaust pipe (21), and an exhaust regulating valve (211) is provided in the middle of the exhaust pipe (21).

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