Impact-resistant rotary drilling cutter

Abstract

The utility model relates to the technical field of drilling tools, in particular to an impact-resistant rotary drilling pick, wherein a shank assembly and a tooth head assembly are connected by brazing, thereby improving the firmness of the connection between the shank assembly and the tooth head assembly and increasing the service life; the utility model comprises a shank assembly and a tooth head assembly, wherein the tooth head assembly and the shank assembly are connected by brazing.

Description

Technical Field

[0001] The utility model relates to the technical field of drilling tools, in particular to an impact-resistant rotary drilling pick. Background Art

[0002] Rotary drilling rigs are often used in people's mechanical production, so the most important part inside them is the rotary drilling pick, which is a construction equipment often used in hole-making operations in building foundation projects. Rotary drilling rigs are a comprehensive drilling rig that can perform both dry and wet excavation operations. They require less auxiliary time for drilling and have lower labor intensity, so they are widely used by people. The use of rotary drilling picks allows it to perform more excavation operations, and it can be suitable for different equipment according to its size and model.

[0003] In the prior art, a patent document with publication number CN213297836U discloses a rotary excavator tooth that is easy to assemble, including a tooth body, an alloy tooth head is installed at the bottom end of the tooth body, and a wear-resistant coating is provided at the lower outer side of the alloy tooth head, the bottom end of the wear-resistant coating is connected to a first transition surface, and a plurality of groups of wolf teeth are fixedly connected above the surface of the first transition surface, an annular groove is welded at the bottom end of the first transition surface, and a threaded hole is provided on the inner side of the annular groove, a stud is threadedly connected to the inner side of the threaded hole, and a limiting plate is welded on one side of the stud.

[0004] During use, it was found that the above-mentioned rotary excavator tooth structure is relatively complex, which increases the production cost and at the same time the connection between the tooth body and the alloy tooth head is poor and the service life is short. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides an impact-resistant rotary drilling pick with a prolonged service life.

[0006] The impact-resistant rotary drilling pick of the utility model comprises a shank assembly and a tooth head assembly, wherein the tooth head assembly and the shank assembly are connected by brazing; the shank assembly and the tooth head assembly are connected by brazing, which simplifies the structure and improves the firmness of the connection between the shank assembly and the tooth head assembly, thereby increasing the service life.

[0007] Preferably, the shank assembly includes a shank body, a tooth body, a shoulder, a positioning groove, an internal threaded portion and a placement groove, the tooth body is arranged at the top of the shank body, a shoulder is arranged between the shank body and the tooth body, a positioning groove is arranged at the top of the tooth body, an internal threaded portion is arranged on the inner side wall of the positioning groove, and two rows of placement grooves are symmetrically arranged on the inner side wall of the positioning groove; when solder powder is placed inside the positioning groove, the solder powder will adhere to the two groups of internal threaded portions and enter the two groups of placement grooves, and then the tooth head assembly is installed inside the positioning groove with the cooperation of the internal threaded portion, and the shank assembly and the tooth head assembly are heated at high temperature to melt the solder powder inside the positioning groove, thereby completing the brazing of the shank assembly and the tooth head assembly, increasing the amount of solder powder between the gap between the shank assembly and the tooth head assembly, and improving the connection firmness.

[0008] Preferably, the tooth head assembly includes a tooth head body, an external threaded portion and a chamfered portion, the outer side wall of the tooth head body is provided with an external threaded portion, the external threaded portion is threadedly connected to the internal threaded portion, and the bottom of the shank body is provided with a chamfered portion; the shank body enters the interior of the positioning groove under the guidance of the chamfered portion, and the shank body is rotated so that the external threaded portion on the shank body is threadedly connected to the internal threaded portion, thereby completing the preliminary installation of the shank body in the positioning groove, improving the convenience of installation, and improving the connection efficiency.

[0009] Preferably, it also includes a tooth unloading groove, and the tooth body is provided with a tooth unloading groove; when the installed shank body, tooth body and tooth head body need to be disassembled, cleaned and replaced, the staff disassembles them through the tooth unloading groove, thereby improving convenience.

[0010] Preferably, the tooth body is in the shape of a polygonal pyramid as a whole; the polygonal pyramid-shaped tooth body promotes the self-rotation ability of the pick under the action of external force while improving the self-drilling ability and footage efficiency of the pick, thereby greatly improving the efficiency of rock crushing operations.

[0011] Preferably, the tooth head body is an alloy tooth; the tooth head body is an alloy tooth, which improves wear resistance and impact resistance and increases service life.

[0012] Preferably, the shank body, the tooth body and the shaft shoulder are integrally formed.

[0013] Compared with the prior art, the utility model has the following beneficial effects: the tooth shank assembly and the tooth head assembly are connected by brazing, which improves the firmness of the connection between the tooth shank assembly and the tooth head assembly and increases the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the axonometric structure of the utility model;

[0015] Figure 2 It is a front structural schematic diagram of the utility model;

[0016] Figure 3 It is a schematic diagram of the explosion structure of the utility model;

[0017] Figure 4 It is an enlarged structural diagram of the tooth body and the shank body;

[0018] Figure 5 It is a front view structural diagram of the tooth head body structure.

[0019] Markings in the accompanying drawings: 1. shank body; 2. tooth body; 3. shaft shoulder; 4. positioning groove; 5. internal thread portion; 6. placement groove; 7. tooth head body; 8. external thread portion; 9. chamfered portion; 10. tooth unloading groove. DETAILED DESCRIPTION

[0020] In order to facilitate the understanding of the utility model, the utility model will be described more comprehensively below with reference to the relevant drawings. The utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the utility model more thorough and comprehensive.

[0021] Example 1

[0022] like Figures 1 to 5 As shown, the impact-resistant rotary drilling pick of the utility model comprises a shank assembly and a tooth head assembly, wherein the tooth head assembly and the shank assembly are connected by brazing;

[0023] like Figures 1 to 4 As shown, the tooth handle assembly includes a tooth handle body 1, a tooth body 2, a shoulder 3, a positioning groove 4, an internal thread portion 5 and a placement groove 6. The tooth body 2 is arranged at the top of the tooth handle body 1, and a shoulder 3 is arranged between the tooth handle body 1 and the tooth body 2. The positioning groove 4 is arranged at the top of the tooth body 2, and the internal thread portion 5 is arranged on the inner side wall of the positioning groove 4. Two rows of placement grooves 6 are symmetrically arranged on the inner side wall of the positioning groove 4.

[0024] like Figure 1 , Figure 2 , Figure 3 and Figure 5 As shown, the tooth head assembly includes a tooth head body 7, an external threaded portion 8 and a chamfered portion 9. The outer wall of the tooth head body 7 is provided with an external threaded portion 8, which is threadedly connected to the internal threaded portion 5. The bottom of the shank body 1 is provided with a chamfered portion 9.

[0025] In this embodiment, brazing powder is placed into the positioning groove 4, the brazing powder will adhere to the two groups of internal threaded portions 5 and enter the two groups of placement grooves 6, the shank body 1 enters the positioning groove 4 under the guidance of the chamfered portion 9, the shank body 1 is rotated, so that the external threaded portion 8 on the shank body 1 is threadedly connected with the internal threaded portion 5, thereby completing the preliminary installation of the shank body 1 in the positioning groove 4, and the shank assembly and the tooth head assembly are heated at high temperature to melt the brazing powder inside the positioning groove 4, thereby completing the brazing of the shank assembly and the tooth head assembly.

[0026] Example 2

[0027] like Figures 1 to 5 As shown, the impact-resistant rotary drilling pick of the utility model comprises a shank assembly and a tooth head assembly, wherein the tooth head assembly and the shank assembly are connected by brazing;

[0028] like Figures 1 to 4 As shown, the tooth handle assembly includes a tooth handle body 1, a tooth body 2, a shoulder 3, a positioning groove 4, an internal thread portion 5 and a placement groove 6. The tooth body 2 is arranged at the top of the tooth handle body 1, and a shoulder 3 is arranged between the tooth handle body 1 and the tooth body 2. The positioning groove 4 is arranged at the top of the tooth body 2, and the internal thread portion 5 is arranged on the inner side wall of the positioning groove 4. Two rows of placement grooves 6 are symmetrically arranged on the inner side wall of the positioning groove 4.

[0029] like Figure 1 , Figure 2 , Figure 3 and Figure 5 As shown, the tooth head assembly includes a tooth head body 7, an external threaded portion 8 and a chamfered portion 9. The outer wall of the tooth head body 7 is provided with an external threaded portion 8, which is threadedly connected with the internal threaded portion 5. The bottom of the shank body 1 is provided with a chamfered portion 9.

[0030] like Figure 2 As shown, it also includes a tooth unloading groove 10, and the tooth body 2 is provided with a tooth unloading groove 10.

[0031] In this embodiment, brazing powder is placed into the positioning groove 4, the brazing powder will adhere to the two groups of internal threaded portions 5 and enter the two groups of placement grooves 6, the shank body 1 enters the positioning groove 4 under the guidance of the chamfered portion 9, the shank body 1 is rotated, so that the external threaded portion 8 on the shank body 1 is threadedly connected with the internal threaded portion 5, thereby completing the preliminary installation of the shank body 1 in the positioning groove 4, the shank assembly and the tooth head assembly are heated at high temperature, so that the brazing powder inside the positioning groove 4 is melted, thereby completing the brazing of the shank assembly and the tooth head assembly, when the installed shank body 1, tooth body 2 and tooth head body 7 need to be disassembled, cleaned and replaced, the staff disassembles them through the tooth unloading groove 10.

[0032] The tooth head body 7 of the impact-resistant rotary drilling pick of the utility model is purchased on the market, and technicians in the industry only need to install and operate it according to the accompanying instruction manual, without the need for creative work by technicians in the field.

[0033] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. An impact-resistant rotary drilling pick, comprising a shank assembly and a tooth head assembly, characterized in that: The tooth head assembly and the tooth shank assembly are connected by brazing; The shank assembly comprises a shank body (1), a tooth body (2), a shoulder (3), a positioning groove (4), an internal thread portion (5) and a placement groove (6); the tooth body (2) is arranged at the top of the shank body (1); a shoulder (3) is arranged between the shank body (1) and the tooth body (2); a positioning groove (4) is arranged at the top of the tooth body (2); an internal thread portion (5) is arranged on the inner side wall of the positioning groove (4); and two rows of placement grooves (6) are symmetrically arranged on the inner side wall of the positioning groove (4).

2. The impact-resistant rotary drilling pick according to claim 1, characterized in that: The tooth head assembly comprises a tooth head body (7), an external threaded portion (8) and a chamfered portion (9); the outer wall of the tooth head body (7) is provided with an external threaded portion (8), the external threaded portion (8) is threadedly connected to the internal threaded portion (5), and the bottom of the shank body (1) is provided with a chamfered portion (9).

3. The impact-resistant rotary drilling pick according to claim 1, characterized in that: It also comprises a tooth unloading groove (10), and the tooth body (2) is provided with a tooth unloading groove (10).

4. The impact-resistant rotary drilling pick according to claim 1, characterized in that: The tooth body (2) is in the shape of a polygonal pyramid as a whole.

5. The impact-resistant rotary drilling pick according to claim 2, characterized in that: The tooth head body (7) is an alloy tooth.

6. The impact-resistant rotary drilling pick according to claim 1, characterized in that: The shank body (1), the tooth body (2) and the shaft shoulder (3) are designed to be integrally formed.

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