TWI866212B - Pneumatic hammer - Google Patents

Abstract

A pneumatic hammer is provided, including a handle assembly, a hammer assembly, and a working assembly. The handle assembly has a main body and a grip portion. The grip portion is connected with the main body and communicated with an gas source. The main body defines an activity space. The hammer assembly is connected to and communicates with the gripping portion. The hammer assembly has a hammer body and a main shaft. The hammer body is positioned on the main shaft and can be driven by gas within the activity space to strike the main shaft. The working assembly comprises a rigid rod and a driving element. The rigid rod is connected to the main shaft in a synchronized manner, and the driving element is located on the rigid rod.

Description

Pneumatic Hammer

The present invention relates to disassembly tools, and in particular to a pneumatic hammer for disassembly.

A pneumatic hammer is a tool that uses compressed air as a power source. By driving the hammer to strike the shaft back and forth quickly, the shaft then transmits the impact force to the target object to perform various operations such as pulling, hammering, digging or cutting. In the field of automobile maintenance, pneumatic hammers are often used to dismantle automobile components such as fuel injectors that are difficult to remove manually. Pneumatic hammers disclosed in Taiwan Patent I595980 and US Patent US6978527 belong to this category.

However, the impact force of the pneumatic hammer of I595980 is insufficient, the posture when using it is not ergonomic, and it needs to be assembled with multiple components, which is not convenient and time-consuming to use. The pneumatic hammer of US6978527 has the problem that the oil nozzle is separated from the vehicle body, and the pneumatic hammer is unexpectedly separated from the oil nozzle. The pneumatic hammer will move around uncontrollably due to the continuous action of the hammer, often injuring bystanders and causing damage to surrounding components.

Therefore, it is necessary to provide a novel and advanced pneumatic hammer to solve the above problems.

The main purpose of the present invention is to provide a pneumatic hammer that can effectively control the pneumatic hammer to perform demolition operations and protect surrounding people and objects from being injured by the hammer.

To achieve the above-mentioned purpose, the present invention provides a pneumatic hammer, including: a holding assembly, a hammering assembly and a working assembly. The holding assembly includes a main body and a holding portion, the holding portion is connected to the main body and is connected to a gas source, and the main body defines a moving space; the hammering assembly is connected to and communicates with the holding portion, the hammering assembly includes a hammer body and a spindle, the hammer body is arranged on the spindle and can be driven by gas in the moving space to hammer the spindle; the working assembly includes a rigid rod and a driving member, the rigid rod is connected to the spindle and is in a synchronous relationship, and the driving member is positioned on the rigid rod.

1: Grip assembly

11: Subject

111: First section

112: Second section

12: Ribs

13: Activity space

14: Grip

15: Bridge connection

16: Cover

161: Through hole

17: Rigid tube

171: Channel

172: First connection hole

173: Second connection hole

18: Connecting shaft

2: Beating components

21: Hammer body

22: Main axis

3: Working components

31: Rigid rod

32: Drive parts

33: Positioning nut

41: First sealing assembly

42: Second sealing assembly

43: The third sealing component

44: Fourth sealing assembly

45: Sealing gasket

451: Outer Ring

452: Inner ring body

46,46A: Ring-shaped pad

461: Ring hole

Figure 1 is a three-dimensional diagram of an embodiment of the present invention.

Figure 2 is an exploded view of Figure 1.

Figure 3 is a partial cross-sectional view of Figure 1.

Figure 4 is a partial enlarged view of Figure 3.

Figure 5 is another partial cross-sectional view of Figure 1.

Figure 6 is a schematic diagram of handheld use of an embodiment of the present invention.

The following examples are only used to illustrate possible implementations of the present invention, but they are not intended to limit the scope of protection of the present invention. The "one" or "at least one" before the terms mentioned in the text does not limit the quantity. It can also be "plural" according to needs. This change in quantity is also within the scope of protection, which should be explained first.

Please refer to Figures 1 to 6, which show an embodiment of the present invention. The pneumatic hammer of the present invention includes: a gripping component 1, a hammering component 2 and a working component 3.

The holding assembly 1 includes a main body 11 and a holding portion 14, the holding portion 14 is connected to the main body 11 and is connected to a gas source, and the main body 11 defines an activity space 13. The hammering assembly 2 is connected to and communicates with the holding portion 14, and the hammering assembly 2 includes a hammer body 21 and a spindle 22, the hammer body 21 is arranged on the spindle 22 and can be driven by gas in the activity space 13 to hammer the spindle 22 to perform a pulling operation with a force. The working assembly 3 includes a rigid rod 31 and a driving member 32. The rigid rod 31 is connected to the main shaft 22 and is in a synchronous relationship. The driving member 32 is positioned on the rigid rod 31. The driving member 32 is horseshoe-shaped and can be used to penetrate a target object such as an oil spray nozzle, and pull the target object synchronously by hooking and pulling. Among them, the rigid rod 31 is not limited to a one-piece or multi-piece assembly.

Preferably, the rigid rod 31 is a solid rod in order to have a stronger structure to withstand impact forces.

Another preferred embodiment is that the length of the rigid rod 31 is greater than the length of the main body 11 so that it can be used in narrow spaces.

In actual use, the user can control the position of the pneumatic hammer by holding the grip 14 with one hand to facilitate adjustment and movement, and if necessary, the user can hold the rigid rod 31 with the other hand to form a two-hand grip. In other words, the rigid rod 31 can be used as an auxiliary grip rod in addition to transmitting the force. In addition, the main body 11 can separate the hammer body 21 from the surrounding people and objects to protect people and objects from being damaged by unexpected impacts of the hammer body 21. The main body 11 has the effect of greatly improving safety.

It is worth mentioning that a plurality of ribs 12 are protruding from the inner wall of the main body 11, and the hammer body 21 can slide against the plurality of ribs 12, so that the hammer body 21 and the inner wall are spaced apart. The plurality of ribs 12 with a smaller contact area can effectively reduce the contact friction resistance and ensure the smooth movement of the hammer body 21.

The main body 11 is cylindrical, and the two ends of the main body 11 are connected to the outside. The main body 11 includes a first diameter section 111 and a second diameter section 112 connected to each other. The first diameter section 111 and the second diameter section 112 enclose the activity space 13. The inner diameter of the second diameter section 112 is larger than the inner diameter of the first diameter section 111. The plurality of ribs 12 are protruding from the inner wall of the second diameter section 112. The plurality of ribs 12 can increase the structural strength of the second diameter section 112. When the hammer body 21 moves in the activity space 13, the gas can enter and exit the activity space 13 accordingly with the hammer body 21 without generating gas resistance, thereby ensuring the movement stability of the hammer body 21.

In more detail, the outer diameter of the second diameter section 112 is larger than the outer diameter of the first diameter section 111, and the first diameter section 111 and the second diameter section 112 form a stepped structure in the outer contour, which helps to identify the assembly direction during the production assembly process. The first diameter section 111, which is recessed relative to the second diameter section 112, can provide a space margin for the hand to hold, thereby forming another auxiliary grip.

The grip assembly 1 further includes a bridge portion 15 and a cover 16. The bridge portion 15 is laterally connected between the main body 11 and the grip portion 14, so that the main body 11 and the grip portion 14 are spaced apart for easy hand gripping, and the main body 11, the grip portion 14 and the bridge portion 15 are integrally formed to improve structural strength and reduce the advantages of assembly steps. The cover 16 is provided at one end of the main body 11 away from the working assembly 3. The cover 16 is provided with a plurality of through holes 161, which are connected to the activity space 13. The cover 16 can effectively prevent foreign objects (such as dust, fingers) from entering the activity space 13, and can have the dual effects of protecting personal safety and smooth operation of the hammer body 21. In addition, the cover 16 is preferably made of rubber material, so that it can deform accordingly as the gas pressure in the activity space 13 increases, and has the effect of stabilizing pressure.

The grip assembly 1 further includes a rigid tube 17 and a connecting shaft 18. The rigid tube 17 includes a channel 171, a first connecting hole 172 and a second connecting hole 173. The main shaft 22 passes through the first connecting hole 172 to connect to the rigid rod 31. The connecting shaft 18 passes through the second connecting hole 173 to connect to the grip portion 14. The main shaft 22, the channel 171, the connecting shaft 18 and the grip portion 14 are interconnected to allow gas to flow in and drive the hammer body 21 to actuate.

The pneumatic hammer also includes four sealing components to ensure that the gas does not leak out. Each of the sealing components includes a sealing gasket 45 and an annular gasket 46. The sealing gasket 45 includes an outer ring 451 and an inner ring 452 connected in a concentric configuration. The outer ring 451 is made of a rigid material, and the inner ring 452 is made of an elastic material. The inner ring 452 is partially exposed to an annular hole 461 protruding from the annular gasket 46. When the sealing gasket 45 and the annular gasket 46 abut against each other, the part of the inner ring 452 protruding from the annular hole 461 is not twisted by the annular gasket 46, and can provide a better airtight effect.

Specifically, the plurality of sealing components can be divided into a first sealing component 41, a second sealing component 42, a third sealing component 43 and a fourth sealing component 44 according to different positions. The first sealing component 41 and the second sealing component 42 are located at two sides of the first connecting hole 172. The inner ring body 452 of the first sealing component 41 and the inner ring body 452 of the second sealing component 42 are sleeved on the main shaft 22. The outer ring body 451 of the first sealing component 41 is sandwiched between the rigid rod 31 and the rigid tube 17. The outer ring body 451 of the third sealing component 42 is sandwiched between the main shaft 22 and the rigid tube body 17, the third sealing component 43 and the fourth sealing component 44 are located on both sides of the second connecting hole 173, the inner ring body 452 of the third sealing component 43 and the inner ring body 452 of the fourth sealing component 44 are sleeved on the connecting shaft 18, the outer ring body 451 of the third sealing component 43 is sandwiched between the connecting shaft 18 and the rigid tube body 17, and the outer ring body 451 of the fourth sealing component 44 is sandwiched between the grip 14 and the rigid tube body 17.

More specifically, the sealing gaskets 45 of each sealing assembly have the same structure, the annular gasket 46 of the second sealing assembly 42, the annular gasket 46 of the third sealing assembly 43 and the annular gasket 46 of the fourth sealing assembly 44 have the same structure, and the thickness and rigidity of the annular gasket 46A of the first sealing assembly 41 are greater than the thickness and rigidity of the annular gasket 46 of the second sealing assembly 42, so as to withstand greater impact without deformation, thereby ensuring structural integrity, airtightness and service life.

Preferably, the main shaft 22 is rotatably disposed through the first connecting hole 172, and the rigid rod 31 is in a co-rotating relationship with the main shaft 22, so as to flexibly adjust the azimuth angle of the driving member 32 as needed.

Another preferred embodiment is that the working assembly 3 further includes a positioning nut 33, the driving member 32 is detachably screwed to the rigid rod 31, the positioning nut 33 is screwed to the rigid rod 31 and abuts against the driving member 32, and the positioning nut 33 can ensure that the driving member 32 will not rotate arbitrarily and disengage from the rigid rod 31.

1: Grip assembly 11: Main body 111: First diameter section 112: Second diameter section 14: Grip section 15: Bridge section 16: Cover 2: Hammer assembly 3: Working assembly 31: Rigid rod 32: Driving part 33: Positioning nut

Claims (10)

A pneumatic hammer includes: a grip assembly, including a main body and a grip portion, the grip portion is connected to the main body and connected to a gas source, and the main body defines a moving space; a hammering assembly, connected and connected to the grip portion, including a hammer body and a spindle, the hammer body is arranged on the spindle and can be driven by gas in the moving space to hammer the spindle; and a working assembly, including a rigid rod and a driving member, the rigid rod is connected to the spindle and is in a synchronous relationship, and the driving member is positioned on the rigid rod. As described in claim 1, the pneumatic hammer, wherein the grip assembly further comprises a rigid tube and a connecting shaft, the rigid tube comprises a channel, a first connecting hole and a second connecting hole, the main shaft passes through the first connecting hole to connect to the rigid rod, the connecting shaft passes through the second connecting hole to connect to the grip, the main shaft, the channel, the connecting shaft and the grip are interconnected. The pneumatic hammer as described in claim 2 further includes four sealing assemblies, each of which includes a sealing gasket and an annular gasket, the sealing gasket includes an outer ring body and an inner ring body connected in a concentric arrangement, the outer ring body is a rigid material, the inner ring body is an elastic material, and a portion of the inner ring body is exposed and protrudes from an annular hole of the annular gasket; wherein the plurality of sealing assemblies can be divided into a first sealing assembly, a second sealing assembly, a third sealing assembly and a fourth sealing assembly according to different positions, the first sealing assembly and the second sealing assembly are located on two sides of the first connecting hole, the first The inner ring body of the sealing assembly and the inner ring body of the second sealing assembly are sleeved on the main shaft, the outer ring body of the first sealing assembly is sandwiched between the rigid rod and the rigid tube body, the outer ring body of the second sealing assembly is sandwiched between the main shaft and the rigid tube body, the third sealing assembly and the fourth sealing assembly are located on both sides of the second connecting hole, the inner ring body of the third sealing assembly and the inner ring body of the fourth sealing assembly are sleeved on the connecting shaft, the outer ring body of the third sealing assembly is sandwiched between the connecting shaft and the rigid tube body, and the outer ring body of the fourth sealing assembly is sandwiched between the gripping portion and the rigid tube body. The pneumatic hammer as described in claim 3, wherein the sealing gaskets of each sealing assembly have the same structure, the annular gasket of the second sealing assembly, the annular gasket of the third sealing assembly and the annular gasket of the fourth sealing assembly have the same structure, and the thickness and rigidity of the annular gasket of the first sealing assembly are greater than the thickness and rigidity of the annular gasket of the second sealing assembly. A pneumatic hammer as described in claim 2, wherein the spindle is rotatably disposed through the first connecting hole, and the rigid rod is in a co-rotating relationship with the spindle. The pneumatic hammer as described in claim 1, wherein the working assembly further includes a positioning nut, the driving member is detachably screwed to the rigid rod, and the positioning nut is screwed to the rigid rod and abuts against the driving member. A pneumatic hammer as described in any one of claims 1 to 6, wherein a plurality of ribs are protruding from the inner wall of the main body, and the hammer body can slide against the plurality of ribs, so that the hammer body and the inner wall are spaced apart. As described in claim 7, the pneumatic hammer, wherein the main body is cylindrical, the two ends of the main body are respectively connected to the outside, the main body includes a first diameter section and a second diameter section connected to each other, the first diameter section and the second diameter section enclose the activity space, the inner diameter of the second diameter section is larger than the inner diameter of the first diameter section, and the plurality of ribs are protruding from the inner wall of the second diameter section. A pneumatic hammer as described in claim 8, wherein the outer diameter of the second diameter segment is larger than the outer diameter of the first diameter segment, and the first diameter segment and the second diameter segment form a stepped structure in the outer contour. The pneumatic hammer as described in claim 4, wherein the spindle is rotatably disposed through the first connecting hole, and the rigid rod is in a co-rotating relationship with the spindle; the working assembly further includes a positioning nut, the driving member is detachably screwed to the rigid rod, the positioning nut is screwed to the rigid rod and abuts against the driving member; a plurality of ribs are protruding from the inner wall of the main body, the hammer body can slidably abut against the plurality of ribs, and the hammer body and the inner wall are spaced apart; the main body is cylindrical, and the two ends of the main body are respectively connected to the outside, and the main body includes a first diameter segment and a second diameter segment connected to each other, and the first diameter segment and the second diameter segment enclose the activity space, The inner diameter of the second diameter section is larger than the inner diameter of the first diameter section, and the plurality of ribs are protruding from the inner wall of the second diameter section; the outer diameter of the second diameter section is larger than the outer diameter of the first diameter section, and the first diameter section and the second diameter section form a stepped structure in the outer contour; the grip assembly further includes a bridge portion and a cover body, the bridge portion is laterally connected to the main The main body, the gripping part and the bridge part are integrally formed, the cover is disposed on one end of the main body away from the working assembly, the cover is provided with a plurality of through holes, and the plurality of through holes are connected to the activity space; the cover is made of rubber material; the length of the rigid rod is greater than the length of the main body; the rigid rod is a solid rod.

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