TWI693336B - Pneumatic hammer structure - Google Patents

Abstract

The invention provides a connecting device which is applied to a pneumatic hammer structure. The pneumatic hammer structure has an outer shell, and the outer shell has two through grooves. The connecting device includes two positioning grooves, and the two positioning grooves are respectively recessed on the surface of the connecting device, and are accommodated in the housing corresponding to the positions of the two through grooves, so as to penetrate and fix the connecting device and the housing. The invention provides the lateral interference positioning of the connecting device and the shell of the pneumatic hammer structure through the arrangement of the positioning groove and the through groove, so as to effectively distribute the load of the connecting device and ensure that the pneumatic hammer structure is not easy to be damaged during the implementation process.

Description

Pneumatic hammer structure

The invention relates to a connecting device and a pneumatic hammer structure using the same, in particular to a connecting device using a positioning groove to provide a fixing function and a pneumatic hammer structure using the same.

The technology involved in the present invention is a large pneumatic hammer structure for drilling or rock drilling or pile driving. Compared with the pneumatic hammers used in general home decoration and machine assembly, the operating environment of such large pneumatic hammers is mainly underground rock formations.

Another difference between the large pneumatic hammer and the general pneumatic hammer is that the large pneumatic hammer not only needs to be provided with an air channel to provide pneumatic impulse, but also must try to discharge the mud and gravel and other waste materials generated during drilling. Innate structural limitations make large pneumatic hammers more vulnerable. However, due to the use characteristics, the structural strength is the first link that large pneumatic hammers must ensure.

An existing large-scale pneumatic hammer system first connects the pneumatic hammer body with a connecting device, and then sets an outer shell on the outer ring of the pneumatic hammer body as a protection. Since the connection device and the body of the pneumatic hammer have various specifications, they are mostly screwed and fixed for easy replacement. However, because the weight of the pneumatic hammer body and the casing is extremely heavy, the above-mentioned screwing fixation method will generate huge tensile stress to the threaded portion of the connecting device.

In addition, due to the harsh operating environment of drilling and piling and unpredictable forces, the connection device is easy to be accidentally damaged during construction, resulting in the pneumatic hammer and the shell detaching from the connection device under the ground, which makes subsequent aftercare work very difficult.

Therefore, in order to overcome the shortcomings of the prior art, the present invention proposes a connecting device and a pneumatic hammer structure using the same. By installing a positioning groove to fix the connecting device and the body and casing of the pneumatic hammer, the pneumatic hammer structure is prevented because Damaged or detached due to stress load.

According to one embodiment of the present invention, a connecting device is provided. The connecting device is applied to a pneumatic hammer structure. The pneumatic hammer structure has a housing, and the housing has a through groove. The connecting device includes at least one surface, a positioning groove is recessed on the surface, and the positioning groove is accommodated in the housing and corresponds to the position of the through groove, so that the connecting device and the housing are penetrated and fixed.

Compared with the existing pneumatic hammer structure, this embodiment additionally provides lateral interference between the connection device and the casing, which can not only effectively distribute the load of the connection device, but also ensure that the connection device and the pneumatic hammer body and the casing will not fall off due to overload. .

In an embodiment, the connection device may further include a connection portion, and the surface is located on the connection portion. Further, the connecting portion may be a polygonal column.

The aforementioned positioning groove may be a concave arc surface, so as to facilitate the insertion and fixation of the bolt at any angle, and avoid the stress concentration problem of the bolt.

In an embodiment, the number of the aforementioned through-groove and surface may be more than two. In this embodiment, the two through grooves may be located on opposite sides of the housing, and the two surfaces are also located on opposite sides of the connection device. That is, the connecting device may include two positioning grooves, and correspond to the two through grooves of the housing.

In an embodiment, the connecting device may further include a base, which is accommodated in the housing and abuts against the inner wall of the housing, thereby ensuring that there is no radial relative displacement between the connecting device and the housing.

The aforementioned connection device may further include an engagement groove, which is recessed on the surface of the connection device and exposes the housing for connecting an external driving source (such as a strange hand). In this embodiment, the surface can also be located on the connection.

According to an embodiment of the present invention, a pneumatic hammer structure is provided, which includes the connection device, the housing, and the insertion pin described in any one of the foregoing embodiments. The connection relationship between the connection device and the housing is as described in the previous embodiment. In this embodiment, the insertion pin penetrates the through groove and the positioning groove to complete the limited fixed relationship between the connection device and the housing.

In the foregoing embodiment in which the number of through grooves and the surface is two, the number of penetrating pins included in the pneumatic hammer structure is corresponding to two, and each penetrating pin respectively penetrates a group of penetrating grooves and positioning grooves.

The effect of this embodiment on the connection device is as described in the previous embodiment, so it will not be repeated here.

100: pneumatic hammer structure

200: Connect the device

201: surface

201A: positioning groove

201B: Connection slot

202: vent

210: connection

220: Dock

230: Assembly Department

300: shell

301: connection hole

310: through slot

400: putting pin

500: drive rod

510: fitting groove

600: Ontology

610: group connection end

1A is a schematic diagram of a connection device according to an embodiment of the present invention; FIG. 1B is a front view of the connection device of FIG. 1A; FIG. 1C is a sectional view taken along line AA of the connection device of FIG. 1B; and FIG. 2 is an application of the connection device of FIG. Schematic diagram of the casing of the pneumatic hammer structure; Figure 3 is a schematic diagram of the connection device and casing combination of the pneumatic hammer structure of Figure 2; Figure 4 is a schematic diagram of the body of the pneumatic hammer structure of Figure 2; Figure 5 is a partial cross-sectional view of the pneumatic hammer structure of Figure 2 Figure; and Figure 6 is a schematic diagram of the overall combination of pneumatic hammer structure.

In order to fully understand the purpose, features and efficacy of the present invention, the following specific embodiments, together with the accompanying drawings, make a detailed description of the present invention, the description is as follows: Please refer to FIGS. 1A, 1B and 1C, the connection device 200 has at least one surface 201, and a positioning groove 201A is recessed on the surface 201. In FIGS. 1A and 1B, the connecting device 200 has six surfaces 201, and the number of positioning grooves 201A is two, and it is recessed on two of the surfaces 201 symmetrical to the connecting device 200. In this embodiment, the connection device 200 has a connection portion 210, and the six surfaces 201 are different surfaces on the connection portion 210. Of course, according to different designs, the connecting device 200 may also include more surfaces 201 and positioning grooves 201A.

Referring again to FIGS. 2 and 3, the housing 300 has two through grooves 310. The connecting device 200 can be partially accommodated inside the housing 300, and a part of the connecting portion 210 is exposed through the connecting hole 301 on the top of the housing 300.

In this state, the two positioning grooves 201A of the connecting device 200 are concealed in the housing 300, and correspond to the positions of the through grooves 310 of the housing 300, allowing external components such as the insertion pin 400 to penetrate together to fix the connecting device 200 and shell 300.

It should be particularly noted that, since a single set of positioning grooves 201A and through grooves 310 can exert a binding effect on the connection device 200 and the housing 300, this embodiment does not limit the positioning grooves 201A and through grooves 310 to be more than two groups. .

In addition, this embodiment is intended to explain the fixed relationship between the connection device 200 and the housing 300. The connection portion 210 is only for convenience in explaining the relative position of the connection device 200 and the housing 300, so the connection portion 210 is not a necessary limitation of this embodiment.

In this embodiment, the connecting portion 210 is a hexagonal cylinder, but this configuration is not a necessary implementation condition of the connecting device 200. In other embodiments, the connecting portion 210 may also be other polygonal columns. In order to facilitate the insertion of the insertion pin 400 into the positioning groove 201A and the through groove 310, the positioning groove 201A can be designed as a concave arc surface, and the through groove 310 is a cylindrical through hole.

In addition, the connection device 200 may include a base 220, which can exert the radial restraint effect of the connection device 200 inside the housing 300, to ensure that the connection portion 210 and the connection hole 301 are kept coaxial, and to avoid bending moments due to relative displacement .

With reference to FIG. 4, in the state of FIG. 3, the assembly portion 230 at the bottom of the connection device 200 is suspended in the housing 300. The function of the assembly part 230 is to connect the body 600 of the pneumatic hammer. The body 600 can penetrate through the bottom of the housing 300, and the top of the body 600 includes the assembly end 610. The assembly end 610 and the assembly part 230 can be screwed correspondingly. Of course, the assembly end 610 and the assembly part 230 can also be combined in different ways.

The main difference between the above embodiment and the existing large-scale pneumatic hammer is that the shell 300 of the pneumatic hammer is not fixed to the body 600 first, and then hanged together with the body 600 to the assembly part 230 of the connection device 200, but the use of the pin 400, The through groove 310 is directly fixed to the positioning groove 201A of the connection device 200.

Through the above arrangement, the load applied to the connection device 200 by the housing 300 can be transferred from the assembly part 230 to the positioning groove 201A, so that the weight of the housing 300 is changed by the pulling force provided by the connection device 200 to counterbalance, effectively reducing the stress of the assembly part 230 load.

Please refer to FIG. 5 and FIG. 6 in conjunction with FIG. 1 and FIG. 2. The present invention can also be implemented in the overall manner of the pneumatic hammer structure 100. For example, the pneumatic hammer structure 100 can be connected to the driving rod 500 of an external driving source, and one side (bottom) of the driving rod 500 has two fitting grooves 510. In contrast, the connecting device 200 can have two engaging grooves 201B can also be provided on the surface 201 of the connecting portion 210. Connecting groove 201B and positioning groove The orientation of 201A at the connecting portion 210 may be the same or different. The fitting groove 510 of the driving rod 500 and the engaging groove 201B of the connecting device 200 can be fixed in the same manner as the positioning groove 201A and the through groove 310 described above. That is, the shape of the connecting portion 210 of the connecting device 200 can match the shape of the inner wall of the bottom of the driving rod 500, and the positions of the engaging groove 201B and the fitting groove 510 also correspond, and the two can be fixed by being threaded.

The top of the driving rod 500 is used to connect a pneumatic device (usually a hand such as a strange hand), air is introduced through the vent 202 of the connecting device 200, and then poured into the body 600 through the assembly part 230 and the assembly end 610. When the pneumatic hammer structure 100 is driven, the driving rod 500 rotates and drills into the ground while driving the body 600 of the tip with gas to impact the rock formation. In the above process, both the housing 300 and the body 600 are indirectly driven by the driving rod 500 through the connecting device 200.

In this setting, the assembly part 230 of the connection device 200 only needs to withstand the torque feedback from the assembly segment 610 and the forward impact force from the rock formation, while the gravity of the shell 300 and the circumferential torque from the outer rock formation will be transmitted to the connection Device 200 and drive rod 500.

Therefore, during the operation of the pneumatic hammer structure 100, the stress distribution of the connection device 200 can be effectively averaged, and it is not easy to cause damage to the local load overload.

The present invention has been disclosed in the above with preferred embodiments, but those skilled in the art should understand that this embodiment is only used to depict the present invention and should not be interpreted as limiting the scope of the present invention. It should be noted that all changes and substitutions equivalent to this embodiment should be included within the scope of the present invention. Therefore, the scope of protection of the present invention shall be subject to those defined in the scope of patent application.

200: Connect the device

201A: positioning groove

201B: Connection slot

202: vent

210: connection

300: shell

310: through slot

400: putting pin

Claims (2)

A pneumatic hammer structure includes: a housing with at least one through groove; a connecting device including at least one surface with a positioning groove recessed therein, the positioning groove being accommodated in the housing and corresponding to the position of the through groove To allow the connection device and the housing to be penetrated and fixed. The connection device further includes a connection portion and a base, the surface is located at the connection portion, the base is accommodated in the housing, and the base abuts against the On the inner wall of the housing, the base is connected below the connecting portion, the cross-sectional area of the base is larger than the cross-sectional area of the connecting portion, and the housing is ring-mounted on the outer layer of the connecting device and penetrates through the through pin A through groove and the positioning groove; an engaging groove concavely arranged on the surface, and the engaging groove exposes the casing for connecting a driving source. A pneumatic hammer structure includes: a housing with at least one through groove; a connecting device including at least one surface with a positioning groove recessed therein, the positioning groove being accommodated in the housing and corresponding to the position of the through groove , For the connection device and the housing to be penetrated and fixed, the number of the through groove and the surface is more than two, the connection device further includes a connection portion and a base, the surface is located in the connection portion, the base Accommodated in the housing, the base abuts against the inner wall of the housing, the base is connected below the connecting portion, the cross-sectional area of the base is greater than the cross-sectional area of the connecting portion, and the outer The shell ring is arranged on the outer layer of the connecting device, and penetrates the through groove and the positioning groove with two penetration pins respectively; an engaging groove is concavely arranged on the surface, and the engaging groove exposes the outer shell for engaging a drive source.

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