A new type of impactor

Abstract

The present invention provides a new type of impactor, which includes an impactor body. A positioning step is provided on the outer circumference of the guide sleeve of the impactor body. The positioning step is in positioning cooperation with the inner step of the outer sleeve tube and constitutes axial limitation at one end of the guide sleeve. A first accommodating cavity is provided at one end of the guide sleeve close to the front joint, and a second accommodating cavity is provided on the outer sleeve tube at the position where the first accommodating cavity is located. A locking member is provided between the guide sleeve and the outer sleeve tube. When the impactor works, the locking member is in the space formed by the first accommodating cavity and the second accommodating cavity. It can effectively avoid the occurrence of the situation where the guide sleeve slides out when the front joint of the impactor is disassembled.

Description

Technical Field

[0001] The present invention relates to the field of impactors, and particularly to a novel impactor. Background Art

[0002] The guide sleeve is one of the gas distribution components provided inside the impactor. During operation, it cooperates with the piston to participate in the gas distribution action. The positioning step provided on the outer circumference of the guide sleeve can be positioned with the inner step of the outer sleeve pipe to form an axial limit at one end. The lower end of the guide sleeve is successively provided with a snap ring and a front joint. During assembly, as the thread is screwed in, the guide sleeve is restricted inside the outer sleeve pipe. When replacing the drill bit, it is necessary to unscrew the front joint and remove the snap ring. At this time, the guide sleeve is very easy to slip out of the outer sleeve pipe, which brings great inconvenience to the assembly work of the impactor after replacing the drill bit. Summary of the Invention

[0003] The purpose of the present invention is to provide a novel impactor. By arranging a locking member inside it, the situation that the guide sleeve slips out when the front joint of the impactor is disassembled can be effectively avoided.

[0004] To achieve the above technical features, the purpose of the present invention is realized as follows: A novel impactor includes an impactor body. A positioning step is provided on the outer circumference of the guide sleeve of the impactor body. The positioning step is in positioning cooperation with the inner step of the outer sleeve pipe and constitutes an axial limit at one end of the guide sleeve.

[0005] A first accommodation cavity is provided at one end of the guide sleeve close to the front joint, and a second accommodation cavity is provided on the outer sleeve pipe at the position where the first accommodation cavity is located. A locking member is provided between the guide sleeve and the outer sleeve pipe. When the impactor is working, the locking member is in the space formed by the first accommodation cavity and the second accommodation cavity.

[0006] A preset distance h1 is provided between the positioning step of the guide sleeve and the inner step of the outer sleeve pipe, so as to ensure that the maximum displacement of the guide sleeve in the outer sleeve pipe is h1; the specific value of h1 should be greater than the maximum distance h2 between the end face of the second end of the guide sleeve and the locking member.

[0007] The locking member is a circlip or an O-ring.

[0008] An O-ring is provided on the guide sleeve.

[0009] The present invention has the following beneficial effects:

[0010] 1. By adopting the above impactor, a locking member is installed between the guide sleeve and the outer sleeve pipe, realizing the locking of the guide sleeve, effectively preventing the problem that the guide sleeve slips out of the outer sleeve pipe after the front joint and the snap ring are removed when replacing the drill bit; thus facilitating the subsequent assembly work of the impactor after replacing the drill bit.

[0011] 2. By setting the specific value of h1 to be greater than the maximum distance h2 between the end face of the second end of the guide sleeve and the locking piece, it is ensured that when the locking piece needs to be disassembled, it is only necessary to move the guide sleeve a certain distance inside the outer sleeve to ensure that the locking piece is disengaged from the first accommodating cavity and release the locking restriction of the guide sleeve on the locking piece, thereby making the disassembly of the locking piece easier. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The present invention will be further described below with reference to the accompanying drawings and examples.

[0013] Figure 1 This is an overall structural diagram of the first embodiment of the present invention.

[0014] Figure 2 For the present invention Figure 1 A partial enlarged view.

[0015] Figure 3 This is an overall structural diagram of the second embodiment of the present invention.

[0016] Figure 4 For the present invention Figure 3 A partial enlarged view of middle B.

[0017] Figure 5 This is a state diagram of the second embodiment of the present invention when the locking member is disassembled.

[0018] Among them: outer sleeve 1, positioning step 2, guide sleeve 3, retaining ring 4, front joint 5, impactor body 6, piston 7, drill bit 8, inner step 9, first accommodating chamber 10, second accommodating chamber 11, locking piece 12, O-ring 13. DETAILED DESCRIPTION

[0019] The embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0020] Example 1:

[0021] like Figure 1-2A new type of impactor includes an impactor body 6, wherein the outer circumference of the guide sleeve 3 of the impactor body 6 is provided with a positioning step 2, which is positioned and matched with the inner step 9 of the outer sleeve 1 and constitutes an axial limit for one end of the guide sleeve 3; the guide sleeve 3 is provided with a first accommodating cavity 10 at one end close to the front joint 5, and a second accommodating cavity 11 is provided on the outer sleeve 1 and located at the position of the first accommodating cavity 10; a locking member 12 is provided between the guide sleeve 3 and the outer sleeve 1, and when the impactor is working, the locking member 12 is located in the space formed by the first accommodating cavity 10 and the second accommodating cavity 11. By adopting the above-mentioned impactor, the locking member 12 is installed between the guide sleeve 3 and the outer sleeve 1, thereby locking the guide sleeve 3, effectively preventing the guide sleeve 3 from slipping out of the outer sleeve after the front joint 5 and the retaining ring 4 are removed when the drill bit 8 is replaced; thereby facilitating the subsequent assembly of the impactor after the drill bit is replaced.

[0022] Embodiment 2:

[0023] See also Figure 3-5 In this embodiment, if the specific solution described in Example 1 is adopted, since both ends of the guide sleeve 3 are locked and positioned inside the guide sleeve 3, the guide sleeve 3 will also block and lock the locking member 12, making it difficult to subsequently remove the locking member 12, resulting in difficulty in removing the locking member when the impactor needs maintenance. To address this problem, the following solution is proposed.

[0024] A novel impactor comprises an impactor body 6, wherein the outer circumference of the guide sleeve 3 of the impactor body 6 is provided with a positioning step 2, which is positioned and matched with the inner step 9 of the outer sleeve 1 and constitutes an axial limit of one end of the guide sleeve 3; the guide sleeve 3 is provided with a first accommodating cavity 10 at one end close to the front joint 5, and a second accommodating cavity 11 is provided on the outer sleeve 1 and located at the position of the first accommodating cavity 10; a locking member 12 is provided between the guide sleeve 3 and the outer sleeve 1; a preset distance h1 is set between the positioning step 2 of the guide sleeve 3 and the inner step 9 of the outer sleeve 1, thereby ensuring that the guide sleeve 3 can move within the outer sleeve 1 to a maximum displacement of h1; the specific value of h1 is greater than the maximum distance h2 between the end face of the second end of the guide sleeve 3 and the locking member 12. For details, see Figure 5 By adopting the above technical solution, when the locking piece 12 needs to be disassembled, it is only necessary to move the guide sleeve 3 a certain distance inside the outer sleeve 1 to ensure that the locking piece 12 is disengaged from the first accommodating cavity 10 and release the locking restriction of the guide sleeve 3 on the locking piece 12, thereby making the disassembly of the locking piece 12 easier.

[0025] Furthermore, the locking member 12 is a wire retaining ring or an O-ring. The adaptability of the device is enhanced by adopting locking members 12 of different structural forms.

[0026] Further, an O-ring 13 is provided on the guide sleeve 3. The above-mentioned O-ring 13 plays a pre-tightening role.

[0027] Embodiment 3:

[0028] In this embodiment, for the disassembly method of the locking member 12 of the new impactor, when it is necessary to disassemble the locking member 12, push the guide sleeve 3 and make the guide sleeve 3 move a certain distance inside the outer sleeve 1, so that the locking member 12 is released from the locking restriction of the guide sleeve 3, and then disassemble the locking member 12.

Claims

1. A new type of impactor, which comprises an impactor body (6), and is characterized in that: A positioning step (2) is provided on the outer circumference of the guide sleeve (3) of the impactor body (6). The positioning step (2) is in positioning fit with the inner step (9) of the outer sleeve (1), and constitutes the axial limit of one end of the guide sleeve (3). A first accommodating cavity (10) is provided at one end of the guide sleeve (3) close to the front joint (5), and a second accommodating cavity (11) is provided on the outer sleeve (1) at the position where the first accommodating cavity (10) is located. A locking member (12) is provided between the guide sleeve (3) and the outer sleeve (1). When the impactor works, the locking member (12) is in the space formed by the first accommodating cavity (10) and the second accommodating cavity (11). A preset distance h1 is provided between the positioning step (2) of the guide sleeve (3) and the inner step (9) of the outer sleeve (1), so as to ensure that the maximum displacement of the guide sleeve (3) moving in the outer sleeve (1) is h1. The specific value of h1 should be greater than the maximum distance h2 between the end face of the second end of the guide sleeve (3) and the locking member (12). The locking member (12) is a wire retaining ring or an O-ring.

2. The novel impactor according to claim 1, wherein: An O-ring (13) is provided on the guide sleeve (3).

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