TWI469853B - Hammering set for a impact tool - Google Patents

Description

Impact tool with hammering group

The present invention relates to hammering groups, and more particularly to a hammering group for impact tools.

According to the conventional rotary impact tool, the impact tool is mostly driven by the hammering group by using an electric motor or a pneumatic motor. The impact tool has a mechanism for generating impact and impact force in the hammering group, such as hammering and hammering. Further, the front end of the hammering group may be used to output a rotary power having an impact effect by the impact tool, wherein the hammering tool is inserted into the hammering block on one side and the other side of the hammering block is provided in the hammering group. A limit portion can be clamped to the hammer to make the hammer block swingable while limiting the swing range of the hammer block, and can effectively control the action of the hammer block, and finally hit the drive shaft with the hammer block to generate the impact force. In addition, in order to avoid the damage of the parts caused by the friction between the hammer block and the drive shaft, a large amount of lubricating oil is added to the hammering group of the impact tool to prolong the service life of the hammering group for the impact tool, TWM379496 And those described in the patent case of TW261039, etc., are such tools.

However, the conventional impact tool has no components for sealing the internal fluid by the hammering group, so the lubricating oil leaks from the gap between the components, so the lubricating oil needs to be re-added after each use period, but the operator often Forgetting to add new lubricants at regular intervals will result in a decrease in the efficiency of use of the impact tool with the hammering group or even damage to the impact tool with the hammering group. Also, add new The lubricating oil process is also extremely lengthy and trivial, causing inconvenience to the operator, and there are drawbacks that need to be improved.

Therefore, it is necessary to provide a novel and progressive impact tool hammering set to solve the above problems.

The main object of the present invention is to provide a hammering group for impact tools, which can prevent lubricating oil from leaking from the gap between the components, so that it is not necessary to re-add the lubricating oil after each use period, which makes the operator more convenient in operation.

In order to achieve the above object, the present invention provides a hammering assembly for an impact tool, the hammering assembly comprising a rotating portion, at least one hammering block, a transmission shaft and a sealing assembly. The rotating portion encloses an accommodating space, and includes a peripheral wall, two end walls connected to opposite ends of the peripheral wall, and at least one pivot portion located in the accommodating space, the peripheral wall is configured to communicate with the accommodating space In contrast to the two openings, one end wall is provided with a shaft hole, and the other end wall is provided with a joint portion for connecting one of the impact tools to the rotating shaft. The hammer block is disposed in the accommodating space, and the hammer block is provided with a constant hole and a pivoting portion pivoted on the pivot portion, and each of the hammer blocks can only be eccentrically biased with each of the pivot portions . The transmission shaft passes through the shaft hole and each of the through holes, and is rotatably disposed on the rotating portion, and can be intermittently actuated by each of the hammer blocks. The sealing assembly is disposed on the rotating portion to seal at least the two openings and is sealed between the hole wall of the shaft hole and the transmission shaft.

1‧‧‧Blasting tools with hammering

2‧‧‧Rotation

3‧‧‧ hammering block

4‧‧‧ drive shaft

5‧‧‧Sealing components

21‧‧‧ accommodating space

22‧‧‧Week wall

231‧‧‧End wall

232‧‧‧End wall

24‧‧‧Band

25‧‧‧ openings

26‧‧‧Axis hole

27‧‧‧Team

271‧‧‧ keyway

28‧‧‧Perforation

281‧‧‧Cleaning pieces

29‧‧‧ Pins

291‧‧‧Washers

31‧‧‧through holes

32‧‧‧Pivot Department

33‧‧‧Limited slot

51‧‧‧Outer kit

51’‧‧‧Outer kit

511‧‧‧

512‧‧‧end board

513‧‧‧Opening

52‧‧‧Seal

1 is a schematic view of a preferred embodiment of the present invention.

2 is an exploded view of a preferred embodiment of the present invention.

Figure 3 is a cross-sectional view of a preferred embodiment of the present invention.

4 is a schematic view of another preferred embodiment of the present invention.

4A is a schematic view showing another aspect of another preferred embodiment of the present invention.

Figure 5 is an exploded view of another preferred embodiment of the present invention.

The following is a description of the possible embodiments of the present invention, and is not intended to limit the scope of the invention as claimed.

Referring to Figures 1-3, there is shown a preferred embodiment of the present invention. The hammering assembly 1 for an impact tool of the present invention comprises a rotating portion 2, at least one hammering block 3, a transmission shaft 4 and a sealing assembly 5. .

The rotating portion 2 includes a receiving space 21, and the rotating portion 2 includes a peripheral wall 22 and two end walls 231, 232 connected to opposite ends of the peripheral wall 22, and at least one pivot portion 24 located in the receiving space 21. In the present embodiment, the number of the pivoting portions 24 is two, and the peripheral wall 22 is disposed to communicate with the accommodating space 21 and opposite to the two openings 25, and the end wall 231 is disposed with a shaft hole 26 and the other end. The wall 232 is provided with a coupling portion 27 for connecting a rotating shaft of the impact tool, and the connecting portion 27 is a key groove 271 which is fixedly disposed on the other end wall 232 and is coupled to the rotating shaft. Each of the pivot portions 24 is a convex portion extending axially in the accommodating space 21 . Specifically, the other end wall 232 is disposed with at least one through hole 28 corresponding to the pivot portion 24 , and each of the pivot portions 24 . A pin member 29 is inserted into the convex portion formed by each of the through holes 28.

In the present embodiment, the number of the hammer blocks 3 is two, and in other embodiments, the number of the hammer blocks 3 may be one (see FIG. 4). Each of the hammer blocks 3 is disposed in the accommodating space 21, and each of the hammer blocks 3 is provided with a constant hole 31 and a pivoting portion 32 pivoted on each of the pivot portions 24, the pivoting portion The portion 32 is a recess corresponding to the shape of the convex portion, and each of the pin members 29 passes through the through holes 28 and is pivotally connected to the concave portion. A limiting groove 33 is located at each of the hammer blocks 3 different from the pivot portion 32. One side can be limited to each of the pin members 29, so that each of the hammer blocks 3 can only be eccentric with each of the pivot portions 24. It should be noted that, in other embodiments, each of the pin members 29 and each of the hammer blocks 3 may be integrally formed and pivoted in the accommodating space 21, specifically, the hammer block 3 The concave portion may be opposite to the convex portion of the accommodating space 21, and each of the hammer blocks is yawed around the pivot portion 24.

The transmission shaft 4 passes through the shaft hole 26 and each of the through holes 31, and is rotatably provided on the rotating portion 2, and can be intermittently actuated by each of the hammer blocks 3. In detail, when the impact tool is connected to the impact tool by the hammering group 1, the rotating shaft can rotate the rotating portion 2, and each of the hammer blocks 3 interlocked inside the rotating portion 2 strikes the transmission. The shaft 4, so that the drive shaft 4 produces a rotating effect with impact force, can be applied to the disassembling component.

The sealing assembly 5 is disposed on the rotating portion 2, and the sealing assembly 5 seals at least the two openings 25 and is sealed between the hole wall of the shaft hole 26 and the transmission shaft 4. Further, the sealing assembly 5 includes an outer sleeve 51 and at least two sealing members 52. In the present embodiment, the number of the sealing members 52 is four. Specifically, the outer sleeve 51 includes a sleeve 511 disposed outside the peripheral wall 22 and an end plate 512 connected to one end of the barrel 511. The seal 52 is sealed to the barrel 511 and the two ends respectively. Between the circumferential surfaces of the walls 231, 232, a sealing member 52 is sealed between the hole wall of the shaft hole 26 and the transmission shaft 4, and a sealing member 52 is sealed to the key groove 271 of the other end wall 232. Between the transmission shafts 4, lubricating oil is prevented from leaking from the shaft hole 26 and the key groove 271. It is understood that the sealing member between the hole wall of the shaft hole 26 and the transmission shaft 4 in this embodiment is 52. The sealing member 52 between the keyway 271 and the transmission shaft 4 is disposed on the rotating portion 2. In other embodiments, the two sealing members 52 can be disposed on the transmission shaft 4, and can still be sealed. It effect. In detail, the end plate 512 defines an opening 513 corresponding to the connecting portion 27 to allow the rotating shaft to be connected to the connecting portion 27 through the opening 513. The sealing member 52 is disposed on the barrel. Between the 511 and the circumferential surface of the two end walls 231, 232, the two openings 25 are sealed to prevent leakage of lubricating oil from the two openings 25. Each of the through holes 28 is further provided with a cover member 281, and each of the cover members 281 is sandwiched between Another of the end walls 232 and the end plate 512, each of the cover members 281 is configured to block the perforations 28 to prevent leakage of lubricating oil from the perforations 28. It can be understood that in the embodiment, the end plate 512 can tightly sandwich the cover member 281 between the other end wall 232 and the end plate 512. In other embodiments, the kit 51' The end plates (Fig. 4A) may not be provided, and each of the cover members 281 may still prevent leakage of lubricating oil from each of the perforations 28. It can be understood that in other embodiments, the barrel 511 of the outer sleeve 51 can be an elastic deformation element. For example, the barrel 511 can be an integrally connected plastic or rubber element, so the sealing assembly 5 can be omitted. The sealing member 52 between the barrel 511 and the circumferential surface of the two end walls 231, 232 can still prevent the lubricating oil from leaking from the two openings 25.

Please refer to FIG. 5 . Of course, in other embodiments, the cover member 281 may not be disposed, and an annular groove may be disposed directly on a circumferential surface of each of the pin members 29 adjacent to one end of each of the through holes 28 . Each of the annular grooves is provided with a gasket 291. The gaskets 291 can provide better sealing between the pin members 29 and the other end wall 232. It should be noted that in other embodiments, the end walls are provided. The through holes 28 can also be formed through the through holes 28, so that the pin members 29 can be inserted or removed from the end holes 231 or the other end holes 232 of the end holes 232 during the disassembly and assembly, which is convenient for operation.

In summary, the impact tool of the present invention has a sealing assembly with a hammer assembly, which can effectively prevent the lubricating oil from leaking from the gap between the components, so that it is not necessary to re-add lubrication after each use period, so that the operator can work. More convenient.

In summary, the overall structural design, practicality and efficiency of the present invention are indeed It is fully in line with the needs of industrial development, and the disclosed structural invention is also an unprecedented innovative structure, so its "novelty" should be undoubted, and the invention can be more effective than the conventional structure. It also has "progressiveness". It fully complies with the requirements of the application requirements for invention patents in China's Patent Law. It is a patent application filed in accordance with the law and is subject to the early review and affirmation.

1‧‧‧Blasting tools with hammering

2‧‧‧Rotation

3‧‧‧ hammering block

4‧‧‧ drive shaft

5‧‧‧Sealing components

51‧‧‧Outer kit

52‧‧‧Seal

Claims (9)

A hammering assembly for an impact tool, comprising: a rotating portion, surrounding a receiving space, comprising a peripheral wall, two end walls connected to opposite ends of the peripheral wall, and at least one pivot portion located in the receiving space, The peripheral wall of the circumference is provided with two opposite openings communicating with the accommodating space, one end hole of the end wall is disposed, and the other end wall is provided with a connecting portion for connecting one of the impact tools to the rotating shaft; at least one hammering The block is disposed in the accommodating space, and each of the hammer blocks is provided with a constant hole and a pivoting portion pivoted on the pivot portion, and each of the hammer blocks can only be yawed with each of the pivot portions as an axis; a transmission shaft passing through the shaft hole and each of the through holes, and rotatably disposed at the rotating portion, which can be intermittently actuated by each of the hammer blocks; and a sealing assembly disposed at the rotation And sealing at least the two openings and sealing between the hole wall of the shaft hole and the transmission shaft. The hammering tool of the impact tool according to claim 1, wherein the pivoting portion is a convex portion extending axially in the accommodating space, and the pivoting portion is a concave portion having a shape corresponding to the convex portion. The impact tool according to claim 2, wherein one end of the end wall is provided with a through hole, the pivot portion is a pin member, and the pin member passes through the through hole and is pivotally connected to the concave portion, the perforation The cover is provided with a cover member. The hammering tool for impact tool according to claim 1, wherein the assembly portion is a key groove that is consistently disposed on the other end wall and is coupled to the rotation shaft, and the sealing assembly is further sealed to the other end wall and the Between the drive shafts. The impact tool of claim 1, wherein the seal assembly comprises an outer sleeve and at least two seals, the outer sleeve comprising a sleeve disposed outside the peripheral wall and a barrel connected thereto An end plate of one end of the body, the end plate defines an opening corresponding to the connecting portion, and the at least two sealing members are respectively sealed between the tubular body and a circumferential surface of the two end walls. The impact tool according to claim 5, wherein one of the end walls is provided with a through hole, and the pivot portion is a convex portion formed by a pin member, and the pivot portion is shaped to correspond to the convex portion. a recessed portion, the pin member passes through the through hole and is pivotally connected to the recessed portion, and the through hole is further covered with a cover member, and the cover member is sandwiched between the end wall and the end plate. The hammering tool for impact tool according to claim 1, wherein the sealing assembly comprises an outer sleeve and a sealing member, the outer sleeve comprising a cylinder tightly attached to the outer peripheral wall, the sealing member being sealed to the shaft hole Between the wall of the hole and the drive shaft. The impact tool according to claim 7, wherein the barrel is an elastic deformation element. A hammering set for an impact tool according to claim 7, wherein the cylinder body is a plastic or rubber member integrally connected to the rotating portion.