Anti-falling clustered down-hole hammer head and clamping sleeve assembly thereof

Abstract

The utility model relates to the technical field of clustered down-the-hole hammers, in particular to an anti-falling clustered down-the-hole hammer head and a clamping sleeve assembly thereof, and adopts the technical scheme that the anti-falling clustered down-the-hole hammer head comprises a hammer handle, and the lower part of the hammer handle is connected with the hammer head; the hammer handle comprises an upper connecting portion and a lower limiting portion, the diameter of the limiting portion is larger than that of the connecting portion, a protruding threaded section is arranged on the outer side of the upper portion of the limiting portion, and the hammer handle is further provided with a through hole penetrating through the hammer handle from top to bottom. A threaded hole is formed in the bottom of the clamping sleeve and matched with the threaded section in size, the small diameter of the threaded hole is larger than the diameter of the limiting part, a limiting hole is formed above the threaded hole, and the length of the limiting hole is larger than the length of the threaded section; the diameter of the limiting part is larger than the inner diameter of a hole above the limiting hole, and the inner diameter of the limiting hole is not smaller than the large diameter of the threaded section. The thickness of the hammer handle is increased through the clamping sleeve, the strength of the hammer handle is improved, lubricating oil is filled between the clamping sleeve and the hammer handle, and friction and vibration between the down-hole hammer and the clamping sleeve during operation are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of cluster down-the-hole hammers, in particular to an anti-drop cluster down-the-hole hammer head and a ferrule assembly thereof. Background Art

[0002] A cluster down-the-hole hammer is a mechanical device that uses high-pressure water or gas to impact underground rocks, soil, and other materials to crush, impact, or drill holes. The device mainly consists of a hammer handle, drill rod, air (water) supply system, and other auxiliary components.

[0003] During operation, high-pressure gas (water) is distributed to each sub-hammer or impactor within a cluster down-the-hole hammer through a specific gas distribution mechanism or nozzle. Each sub-hammer or impactor is equipped with an impact chamber, where the high-pressure gas (water) rapidly expands, generating a powerful impact force. However, with continued use, the hammer head of a cluster down-the-hole hammer gradually wears out and may become damaged. In particular, if the shank breaks, the hammer head may accidentally fall into the drill hole. In this case, recovering the hammer head is not only extremely difficult but also carries a high safety risk. Utility Model Content

[0004] This utility model designs a drop-resistant cluster down-the-hole hammer head and its ferrule assembly. This design ensures that even if the hammer handle breaks, the hammer head will not separate from the main body of the cluster down-the-hole hammer, effectively preventing the hammer head from falling and achieving higher operational safety and reliability. To address the technical problems existing in the above-mentioned background art, the utility model provides a drop-resistant cluster down-the-hole hammer head and its ferrule assembly.

[0005] The technical solution of the utility model is as follows: it comprises a hammer handle, the lower part of which is connected to the hammer head;

[0006] The hammer handle includes an upper connecting portion and a lower limiting portion. The limiting portion has a larger diameter than the connecting portion. The outer surface of the limiting portion is a smooth cylindrical surface. An outwardly convex threaded section is provided on the outer side of the upper portion. The hammer handle is also provided with a through hole that penetrates the hammer handle from top to bottom.

[0007] A ferrule is sleeved on the outside of the hammer handle, and the inside of the ferrule is empty, with stepped holes opened from bottom to top, wherein the bottom is a threaded hole, the threaded hole matches the size of the threaded section, the minor diameter of the threaded hole is larger than the diameter of the limiting part, the threaded hole is above the limit hole, the length of the limit hole is larger than the length of the threaded section, the connecting part passes through the upper part of the ferrule, the diameter of the limit part is larger than the inner diameter of the hole above the limit hole, and the inner diameter of the limit hole is not less than the major diameter of the threaded section.

[0008] The connecting portion is provided with a first connecting portion and a second connecting portion from top to bottom, the diameter of the second connecting portion is larger than that of the first connecting portion, and the outer circles of the adjacent ends of the two are smoothly transitioned through an arc-shaped transition portion;

[0009] A first connecting hole with an inner diameter matching the first connecting part is also provided above the limiting hole. The depth of the first connecting hole is equal to the total length of the first connecting part and the transition part. A second connecting hole is also provided above the first connecting hole. The inner diameter of the second connecting hole matches the second connecting part.

[0010] The length of the transition portion is 0.8-1.2 times the length of the second connecting portion.

[0011] The beneficial effect of the above solution is that the overall strength of the down-the-hole hammer is increased, and it can play a buffering role when it is impacted.

[0012] The outer surface of the ferrule is divided into the first, second and third sets with increasing diameters from top to bottom. The first set is located outside the first connecting hole, the second set is located outside the first connecting hole and the second connecting hole, and the third set is located outside the limiting hole and the threaded hole.

[0013] This design can reduce production costs, thicken the hammer handle to increase strength, and reduce the possibility of the hammer handle breaking.

[0014] The upper diameter of the hammer head is larger than the minor diameter of the threaded hole and the diameter of the limiting portion, and is connected to the limiting portion through an arc transition.

[0015] There is a certain size difference between the upper portion of the hammer head and the limiting portion, which can further limit the position of the ferrule, making the position of the ferrule more fixed.

[0016] A fixing piece is arranged on the upper end of the ferrule to limit the position of the hammer handle.

[0017] After the lower part of the ferrule contacts the top surface of the limiting part of the hammer handle, the upper end is limited by a fixing piece.

[0018] When installing the ferrule and hammer handle, the threaded hole and the threaded section are installed in the direction close to the hammer head. The threaded hole passes through all the threads of the threaded section and continues to approach the hammer head until the lower part of the ferrule contacts the top surface of the limiting part of the hammer handle, thereby limiting the ferrule.

[0019] During the operation of the down-the-hole hammer, when the limit portion of the hammer handle breaks, the threaded section falls to the upper surface of the threaded hole, preventing the hammer handle from falling further into the drill hole.

[0020] The hammer handle is provided with a clamping portion above the connecting portion for installing a fixing piece, and the outer diameter of the clamping portion is smaller than the outer diameter of the connecting portion.

[0021] The fixing member is a clasp. The clasp is composed of a first annular clamp and a second annular clamp. The first annular clamp and the second annular clamp are two semicircular ring structures. A circumferentially closed sealing groove is provided on the outside of the clasp. A sealing ring is installed in the sealing groove to tighten the clasp.

[0022] The clamping ring is matched with the connecting portion in size and is sleeved on the outside of the clamping portion. The bottom of the clamping ring is in contact with the upper surface of the first connecting portion.

[0023] Furthermore, the upper surface of the first connecting portion is flush with the upper surface of the ferrule, and the ferrule can also be designed to be composed of multiple sections, and the outer surface diameter of the ferrule is larger than the outer surface diameter of the first sleeve.

[0024] Through this design, the retaining ring can limit the upward movement of the sleeve relative to the hammer handle. During installation, the segmented design of the retaining ring makes assembly easier.

[0025] The lower part of the through hole is set to be trumpet-shaped and open outwards, and is connected to the outside at the end of the hammer head. The trumpet-shaped end can make the gas (water flow) pass through a larger area during operation and improve the operation efficiency.

[0026] The beneficial effects of the embodiments of the present utility model are as follows: the ferrule of the present design increases the thickness of the hammer handle of the down-the-hole hammer, improves the strength of the hammer handle, and lubricating oil is filled between the ferrule and the hammer handle to reduce the friction and vibration between the ferrule and the hammer handle during the operation of the down-the-hole hammer. When the hammer head breaks, the hammer head can fall into the ferrule to prevent the hammer head from falling into the drill hole. The manufacturing process of the ferrule is simple, the installation is firm and convenient, and the manufacturing cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In the attached figure:

[0028] Figure 1 This is an overall cross-sectional view of an anti-drop cluster down-the-hole hammer head and its ferrule assembly according to the utility model;

[0029] Figure 2 This is a cross-sectional view of a hammer head of an anti-drop cluster down-the-hole hammer and a hammer handle of a ferrule assembly thereof;

[0030] Figure 3 This is a structural diagram of a drop-proof cluster down-the-hole hammer head and a clamping ring of a clamping sleeve assembly of the utility model.

[0031] The components represented by the reference numerals in the figure are:

[0032] 1. Hammer handle; 101. Limiting part; 102. Connecting part; 103. Threaded section; 104. Through hole; 105. Hammer head; 112. Second connecting part; 122. Transition part; 132. First connecting part; 2. Adapter sleeve; 201. Threaded hole; 202. Limiting hole; 203. Second connecting hole; 204. First connecting hole; 3. Snap ring; 301. Sealing ring; 302. First annular clamp; 303. Second annular clamp. DETAILED DESCRIPTION

[0033] Figures 1 to 3 As shown, an anti-drop cluster down-the-hole hammer head and its ferrule assembly, the technical solution of the utility model is as follows: comprising a hammer handle 1, the lower part of the hammer handle 1 is connected to the hammer head 105;

[0034] The hammer handle 1 includes an upper connecting portion 102 and a lower limiting portion 101. The limiting portion 101 has a larger diameter than the connecting portion 102. The limiting portion 101 has a smooth cylindrical outer surface and an outwardly convex threaded section 103 on its upper outer side. The hammer handle 1 is also provided with a through hole 104 that passes through the hammer handle 1 from top to bottom.

[0035] A ferrule 2 is sleeved on the outside of the hammer handle 1. The inside of the ferrule 2 is empty, and a stepped hole is opened from bottom to top, wherein the bottom is a threaded hole 201, and the threaded hole 201 matches the size of the threaded section 103. The minor diameter of the threaded hole 201 is larger than the diameter of the limiting part 101. Above the threaded hole 201 is a limiting hole 202, and the length of the limiting hole 202 is greater than the length of the threaded section 103. The connecting part 102 passes through the upper part of the ferrule 2, and the diameter of the limiting part 101 is larger than the inner diameter of the hole above the limiting hole 202. The inner diameter of the limiting hole 202 is not less than the major diameter of the threaded section 103.

[0036] The outer surface of the limiting portion 101 is a smooth cylindrical surface. This design reduces friction with the inner wall of the ferrule 2 and extends the service life of the down-the-hole hammer.

[0037] The connecting portion 102 is provided with a first connecting portion 132 and a second connecting portion 112 from top to bottom. The diameter of the second connecting portion 112 is larger than that of the first connecting portion 132. The outer circles of the adjacent ends of the two are smoothly transitioned through an arc-shaped transition portion 122, as shown in FIG.

[0038] The arc-shaped transition portion 122 can reduce stress concentration. In structural design, sharp corners or right angles often become areas of stress concentration, making the structure more susceptible to damage when subjected to external forces. The arc-shaped transition portion 122 can disperse these stresses and make them more evenly distributed in the structure, thereby improving the overall load-bearing capacity.

[0039] In addition, in product design, the arc-shaped transition portion 122 can not only make the product look smoother and more beautiful, but also improve the feel of the product and reduce the harm of sharp edges to the human body.

[0040] A first connecting hole 204 is also provided above the limiting hole 202, and the inner diameter of the first connecting part 132 matches the depth of the first connecting hole 204 is equal to the total length of the first connecting part 132 and the transition part 122. A second connecting hole 203 is also provided above the first connecting hole 204, and the inner diameter of the second connecting hole 203 matches the second connecting part 112.

[0041] The length of the transition portion 122 is 0.8-1.2 times the length of the second connecting portion 112 .

[0042] The beneficial effect of the above solution is that it increases the overall strength of the down-the-hole hammer and provides a cushioning effect when subjected to impact. The outer surface of the ferrule 2 is divided into a first, second, and third set of diameters, increasing from top to bottom. The first set is located outside the first connecting hole 204, the second set is located outside the first connecting hole 204 and the second connecting hole 203, and the third set is located outside the limiting hole 202 and the threaded hole 201.

[0043] This design can reduce production costs, thicken the hammer handle 1 to increase its strength, and reduce the possibility of the hammer handle 1 breaking.

[0044] Not only does it increase the overall strength of the hammer handle 1 , it also enables the hammer handle 1 to better disperse stress when subjected to impact force, thereby reducing the risk of breakage.

[0045] The upper diameter of the hammer head 105 is larger than the minor diameter of the threaded hole 201 and the diameter of the limiting portion 101 , and is connected to the limiting portion 101 through an arc transition.

[0046] There is a certain size difference between the upper portion of the hammer head 105 and the limiting portion 101, which can further limit the position of the ferrule 2, making the position of the ferrule 2 more fixed.

[0047] A fixing piece is provided on the upper end of the ferrule 2 to limit the position of the hammer handle 1.

[0048] After the lower portion of the ferrule 2 contacts the top surface of the limiting portion 101 of the hammer handle 1 , the upper end is limited by a fixing piece.

[0049] When installing the ferrule 2 and the hammer handle 1, the threaded hole 201 cooperates with the threaded section 103 to be installed in the direction close to the hammer head 105. The threaded hole 201 passes through all the threads of the threaded section 103 and continues to approach the hammer head 105 until the lower part of the ferrule 2 contacts the top surface of the limiting portion 101 of the hammer handle 1, thereby limiting the ferrule 2.

[0050] During the operation of the down-the-hole hammer, when the limiting portion 101 of the hammer handle 1 breaks, the threaded section 103 falls to the upper surface of the threaded hole 201, preventing the hammer handle 1 from falling further into the drill hole.

[0051] When the ferrule 2 needs to be disassembled or replaced, it can be easily removed by simply rotating it in the opposite direction without the need for complicated tools or steps, thus reducing maintenance costs and time.

[0052] The hammer handle 1 is provided with a clamping portion above the connecting portion 102 for mounting a fixing member. The outer diameter of the clamping portion is smaller than the outer diameter of the connecting portion 102 .

[0053] The fixing member is a snap ring 3. The snap ring 3 is composed of a first ring clamp 302 and a second ring clamp 303. The first ring clamp 302 and the second ring clamp 303 are two semicircular ring structures, such as Figure 3As shown, a circumferentially closed sealing groove is further provided on the outside of the clamping ring 3 , and a sealing ring 301 is installed in the sealing groove to fasten the clamping ring 3 .

[0054] The size of the snap ring 3 matches that of the connecting portion 102 and is sleeved outside the clamping portion. The bottom of the snap ring 3 is in contact with the upper surface of the first connecting portion 132 .

[0055] Furthermore, the upper surface of the first connecting portion 132 is flush with the upper surface of the ferrule 2, and the ferrule 3 can also be designed to be composed of multiple sections, and the outer surface diameter of the ferrule 3 is larger than the outer surface diameter of the first sleeve.

[0056] Through this design, the retaining ring 3 can limit the upward movement of the sleeve 2 relative to the hammer handle 1. During installation, the segmented design of the retaining ring 3 is more convenient for assembly.

[0057] Through hole 104 is designed with a trumpet-shaped bottom portion that opens outward, and is connected to the outside at the end of hammer head 105. The through hole 104, which extends from top to bottom through hammer handle 1, not only ensures smooth passage of air or water, but also improves the operating efficiency of the down-the-hole hammer. Especially during drilling operations, the design of through hole 104 helps remove drill cuttings, keeping the drill hole clean and unobstructed.

[0058] Furthermore, the trumpet-shaped end can increase the passing area of ​​airflow or waterflow during operation, thereby improving the operation efficiency.

Claims

1. An anti-drop cluster down-the-hole hammer head and its ferrule assembly, characterized in that: It comprises a hammer handle (1), the lower part of which is connected to a hammer head (105); The hammer handle (1) comprises an upper connecting portion (102) and a lower limiting portion (101); the limiting portion (101) has a diameter larger than that of the connecting portion (102); the limiting portion (101) has an outer surface that is a smooth cylindrical surface, and an outer convex threaded section (103) is provided on the upper outer side thereof; the hammer handle (1) is also provided with a through hole (104) that penetrates the hammer handle (1) from top to bottom; The hammer handle (1) is sleeved with a sleeve (2) on the outside, the sleeve (2) is hollow inside, and a stepped hole is provided from bottom to top, wherein the bottom is a threaded hole (201), the threaded hole (201) matches the size of the threaded section (103), the threaded hole (201) has a minor diameter greater than the diameter of the limiting portion (101), a limiting hole (202) is provided above the threaded hole (201), the length of the limiting hole (202) is greater than the length of the threaded section (103), the connecting portion (102) passes through the upper part of the sleeve (2), the diameter of the limiting portion (101) is greater than the inner diameter of the hole above the limiting hole (202), and the inner diameter of the limiting hole (202) is not less than the major diameter of the threaded section (103); A fixing piece is provided at the upper end of the clamping sleeve (2) to limit the position of the hammer handle (1).

2. The anti-drop cluster down-the-hole hammer head and its ferrule assembly according to claim 1, characterized in that: The connecting portion (102) is provided with a first connecting portion (132) and a second connecting portion (112) from top to bottom, the second connecting portion (112) has a larger diameter than the first connecting portion (132), and the outer circles of the adjacent ends thereof are smoothly transitioned through an arc-shaped transition portion (122); A first connecting hole (204) having an inner diameter matching that of the first connecting portion (132) is further provided above the limiting hole (202); the depth of the first connecting hole (204) is equal to the total length of the first connecting portion (132) and the transition portion (122); a second connecting hole (203) is further provided above the first connecting hole (204); the inner diameter of the second connecting hole (203) matches that of the second connecting portion (112).

3. The anti-drop cluster down-the-hole hammer head and its ferrule assembly according to claim 2, characterized in that: The length of the transition portion (122) is 0.8-1.2 times the length of the second connecting portion (112).

4. The anti-drop cluster down-the-hole hammer head and its ferrule assembly according to claim 1, characterized in that: After the lower portion of the clamping sleeve (2) contacts the top surface of the limiting portion (101) of the hammer handle (1), the upper end is limited by a fixing piece.

5. The anti-drop cluster down-the-hole hammer head and its ferrule assembly according to claim 2, characterized in that: The outer surface of the ferrule (2) is divided into a first set, a second set and a third set with increasing diameters from top to bottom, wherein the first set is located outside the first connecting hole (204), the second set is located outside the first connecting hole (204) and the second connecting hole (203), and the third set is located outside the limiting hole (202) and the threaded hole (201).

6. The anti-drop cluster down-the-hole hammer head and its ferrule assembly according to claim 1, characterized in that: The upper diameter of the hammer head (105) is larger than the minor diameter of the threaded hole (201) and the diameter of the limiting portion (101), and is connected to the limiting portion (101) through an arc transition.

7. The anti-drop cluster down-the-hole hammer head and its ferrule assembly according to claim 1, characterized in that: The hammer handle (1) is provided with a clamping portion above the connecting portion (102) for mounting a fixing member, and the outer surface diameter of the clamping portion is smaller than the outer diameter of the connecting portion (102).

8. The anti-drop cluster down-the-hole hammer head and its ferrule assembly according to claim 7, characterized in that: The fixing member is a snap ring (3).

9. The anti-drop cluster down-the-hole hammer head and its ferrule assembly according to claim 8, characterized in that: The snap ring is composed of a first annular clamp (302) and a second annular clamp (303). The first annular clamp (302) and the second annular clamp (303) are two semicircular annular structures. A circumferentially closed sealing groove is also provided on the outside of the snap ring (3). A sealing ring (301) is installed in the sealing groove to fasten the snap ring (3).

10. The anti-drop cluster down-the-hole hammer head and its ferrule assembly according to claim 1, characterized in that: The lower portion of the through hole (104) is configured to be in a trumpet shape opening outward.

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