Fixture for embedding cylindrical teeth

Abstract

The utility model belongs to the field of assembly fixtures, and particularly relates to a fixture for embedding cylindrical teeth. In order to solve the problems that in the prior art, due to the fact that the coaxiality of a column tooth and a tooth hole is judged only through naked eyes of a worker, when the worker knocks the column tooth into the tooth hole through a hammer, a horn-shaped notch is formed in the top of the tooth hole, and therefore the phenomena that the column tooth falls off, the tooth hole wall is damaged and the like occur when a drill bit conducts impact rotation are caused. In order to solve the technical problems, the utility model provides the clamp for embedding the column teeth. The fixture for embedding the cylindrical teeth comprises a base, the base is provided with a positioning hole used for being in clearance fit with the cylindrical teeth, and the base is fixedly provided with a gradienter used for measuring the axis inclination angle of the positioning hole. Due to the fact that the positioning hole is in clearance fit with the column tooth, the axis inclination angle of the column tooth can be obtained by measuring the axis inclination angle of the positioning hole through a gradienter, the coaxiality of the column tooth and the tooth hole can be guaranteed, and the service life of the drill bit is prolonged.

Description

Technical Field

[0001] The utility model belongs to the field of assembly fixtures, in particular to a fixture for inlaying column teeth. Background Art

[0002] In drill bits such as down-the-hole drill bits, top hammer drill bits and roller drill bits, column teeth need to be interference-fitted in the tooth holes of the drill bits. For example, a Chinese utility model patent with authorization announcement number CN203867471U and authorization announcement date 2014.10.08 discloses a gauge-protected down-the-hole drill bit, in which column teeth are interference-fitted in the tooth holes of the drill bit.

[0003] Before the formal tooth setting, the column tooth and the tooth hole need to be pre-positioned. In the prior art, the staff generally holds the column tooth in one hand and a hammer in the other hand, and uses the naked eye to observe the coaxiality of the column tooth and the tooth hole. When the column tooth and the tooth hole are basically coaxial, the column tooth is hammered into the tooth hole with a hammer.

[0004] In the prior art, since the coaxiality of the column tooth and the tooth hole is judged by the naked eye of the staff, it is impossible to ensure that the column tooth and the tooth hole are always coaxial. Therefore, when the column tooth is hammered into the tooth hole with a hammer, the top of the tooth hole will collide with the column tooth and deform due to the displacement of the column tooth, resulting in a trumpet-shaped notch at the top of the tooth hole. In the subsequent use process, due to the existence of the notch, when the drill bit is impacted and rotated, the column tooth will move, resulting in the column tooth falling off, the tooth hole wall being damaged, etc., which seriously affects the service life of the drill bit. Utility Model Content

[0005] The utility model aims to provide a clamp for setting column teeth, so as to solve the technical problem that in the prior art, the coaxiality between the column teeth and the tooth holes is judged only by the naked eyes of the staff, so when the staff uses a hammer to knock the column teeth into the tooth holes, a trumpet-shaped notch appears on the top of the tooth holes, which causes the column teeth to fall off and the tooth hole walls to be damaged when the drill bit is impacted and rotated, seriously affecting the service life of the drill bit.

[0006] In order to achieve the above-mentioned purpose, the technical solution of the clamp for setting column teeth provided by the utility model is:

[0007] A fixture for setting column teeth comprises a base, the base is provided with a positioning hole for matching with the column tooth clearance, and a level for measuring the axis inclination angle of the positioning hole is fixedly mounted on the base; the base comprises a mounting plate and a cantilever beam connected to the mounting plate, the positioning hole is arranged on the cantilever beam, and the level is mounted on the mounting plate.

[0008] Furthermore, the positioning hole is located at the end of the cantilever beam.

[0009] Furthermore, the end of the cantilever beam has an observation window communicated with the middle of the positioning hole.

[0010] Furthermore, the end of the cantilever beam has a rounded corner transition, and the observation window is a fan-shaped observation window.

[0011] Furthermore, the cantilever beam and the spirit level are respectively located on two opposite sides of the mounting plate.

[0012] Furthermore, the base has a mounting groove, and the spirit level is installed in the mounting groove.

[0013] Furthermore, the mounting groove is a U-shaped groove that penetrates the base.

[0014] Furthermore, the spirit level is a magnetic spirit level.

[0015] Furthermore, two cantilever beams are arranged at intervals along the axis of the positioning hole.

[0016] The beneficial effects of the fixture for column tooth inlay of the present utility model are as follows: The present utility model is an innovative invention. When using the fixture for column tooth inlay in the technical solution to inlay column teeth on a drill bit, the column teeth can be conveniently fixed through the positioning holes. At the same time, with the clearance fit between the positioning holes and the column teeth, it can ensure that when the column teeth are struck with a hammer, the column teeth can move relative to the positioning holes and enter the tooth holes of the drill bit; due to the clearance fit between the positioning holes and the column teeth, the axes of the positioning holes and the column teeth coincide. By using a spirit level to measure the inclination angle of the axis of the positioning hole, the inclination angle of the axis of the column teeth can be obtained, thereby conveniently judging the coaxiality between the column teeth and the tooth holes. Furthermore, it can ensure that when the column teeth are struck with a hammer, the column teeth and the tooth holes are always coaxial, avoiding phenomena such as column tooth shedding and tooth hole wall damage, and improving the service life of the drill bit. Description of the Drawings

[0017] Figure 1 is a schematic structural diagram of an embodiment of the fixture for column tooth inlay of the present utility model;

[0018] Figure 2 is a schematic structural diagram of the embodiment of the fixture for column tooth inlay of the present utility model after clamping the column teeth;

[0019] Figure 3 is a schematic structural diagram when inlaying column teeth using the embodiment of the fixture for column tooth inlay of the present utility model.

[0020] Description of the Reference Numerals:

[0021] 1. Mounting plate; 2. Cantilever beam; 3. Positioning hole; 4. Observation window; 5. Spirit level; 6. Column tooth; 7. Drill bit; 8. Tooth hole. Detailed Embodiment

[0022] To solve the technical problem in the prior art that only the naked eye is relied on to judge the coaxiality of the button bits and the tooth holes, resulting in a trumpet-shaped notch at the top of the tooth holes, thereby reducing the service life of the drill bit. The main idea of the present utility model lies in: fixing the button bits by using the positioning holes on the base, and making the positioning holes and the button bits in clearance fit, so as to ensure that the axes of the positioning holes and the button bits coincide; at the same time, using a level to measure the inclination angle of the axis of the positioning hole, so as to obtain the inclination angle of the button bit, and further ensure the coaxiality of the button bit and the tooth hole, and improve the service life of the drill bit.

[0023] The following further describes the present utility model in detail with reference to the embodiments.

[0024] Specific embodiments of the fixture for button bit inlay provided by the present utility model:

[0025] As Figures 1 to 3 shown, the fixture for button bit inlay includes a base, the base is provided with positioning holes 3 for clearance fit with the button bits 6, and a level 5 for measuring the inclination angle of the axis of the positioning holes 3 is fixedly installed on the base.

[0026] When using the fixture for button bit inlay to inlay the button bits 6 onto the drill bit 7, the button bits 6 can be conveniently fixed through the positioning holes 3. At the same time, the clearance fit between the positioning holes 3 and the button bits 6 can ensure that when the button bits 6 are struck with a hammer, the button bits 6 can move relative to the positioning holes 3 and enter the tooth holes 8 of the drill bit 7; due to the clearance fit between the positioning holes 3 and the button bits 6, the axes of the positioning holes 3 and the button bits 6 coincide. By using the level 5 to measure the inclination angle of the axis of the positioning holes 3, the inclination angle of the axis of the button bits 6 can be obtained, so as to conveniently judge the coaxiality of the button bits 6 and the tooth holes 8, and further ensure that when the button bits 6 are struck with a hammer, the button bits 6 and the tooth holes 8 are always coaxial, avoiding phenomena such as the button bits 6 falling off and the tooth hole walls being damaged, and improving the service life of the drill bit 7.

[0027] As Figures 1 to 3 shown, specifically, as a specific embodiment, the base includes a mounting plate 1 and a cantilever beam 2 connected to the mounting plate 1. The positioning holes 3 are arranged on the cantilever beam 2, and the level 5 is installed on the mounting plate 1; and the positioning holes 3 are located at the end of the cantilever beam 2, and the cantilever beam 2 and the level 5 are respectively located on the opposite sides of the mounting plate 1.

[0028] Since the level 5 has a large volume, but the button bit 6 has a small volume, therefore, it is more convenient to install the level 5 through the mounting plate 1 and fix the button bit 6 through the cantilever beam 2; making the positioning holes 3 located at the end of the cantilever beam 2, and the cantilever beam 2 and the level 5 are respectively located on the opposite sides of the mounting plate 1 can facilitate the worker to strike the button bit 6 with a hammer and avoid the worker hitting the level 5.

[0029] However, in other specific embodiments, the base can also be an entire flat plate. The positioning hole 3 is located on one side of the flat plate, and the spirit level 5 is installed on the upper surface of the flat plate. Specifically, the spirit level 5 can be a magnetic spirit level, and the flat plate is an iron plate, and the magnetic spirit level can be adsorbed on the iron plate; or, the positioning hole 3 can be located in the middle of the cantilever beam 2, and by making the cantilever beam 2 and the spirit level 5 located on the opposite sides of the mounting plate 1 respectively, it can prevent the worker from hitting the spirit level 5; or, both the cantilever beam 2 and the spirit level 5 are located on the same side of the mounting plate 1. By lengthening the length of the cantilever beam 2 and making the positioning hole 3 located at the end of the cantilever beam 2, the distance between the positioning hole 3 and the spirit level 5 can be increased to prevent the worker from hitting the spirit level 5.

[0030] As Figures 1 to 3 shown, in order to facilitate observing the relative position of the column teeth 6 and the tooth hole 8, as a specific embodiment, the end of the cantilever beam 2 has an observation window 4 communicating with the middle of the positioning hole 3. Specifically, the end of the cantilever beam 2 has a rounded transition, and the observation window 4 is a fan-shaped observation window. Through the observation window 4, the relative position of the column teeth 6 and the tooth hole 8 can be observed, so as to conveniently judge whether the column teeth 6 and the tooth hole 8 are aligned; through the fan-shaped observation window, the column teeth 6 can be observed from multiple angles, which is convenient for the worker to observe.

[0031] However, in other specific embodiments, the observation window 4 can also be not provided, and the worker judges whether the column teeth 6 and the tooth hole 8 are aligned by rotating the column teeth 6; or, the observation window 4 communicates with the lower part of the positioning hole 3, so that the contact part of the column teeth 6 and the tooth hole 8 can be directly observed through the observation window 4; or, the observation window 4 is an observation window 4 of any shape such as a rectangle; or, two cantilever beams 2 are arranged at intervals along the axial direction of the positioning hole 3, and an observation window 4 is formed between the two cantilever beams 2. In this embodiment, the setting position and shape of the observation window 4 are not limited, as long as the worker can judge that the column teeth 6 have been aligned with the tooth hole 8 through the observation window 4.

[0032] As Figures 1 to 3 shown, in order to conveniently install the spirit level 5, as a specific embodiment, the base has a mounting groove, and the spirit level 5 is installed in the mounting groove. Specifically, the mounting groove is a U-shaped groove penetrating the base, the mounting groove is arranged at one end of the mounting plate 1 away from the cantilever beam 2, the spirit level 5 is a magnetic spirit level, and the mounting plate 1 is a metal plate.

[0033] However, in other specific embodiments, the mounting groove can also be not provided, but the spirit level 5 is directly adsorbed on the mounting plate 1; or, the spirit level 5 is fixed on the mounting plate 1 by means of bolt screwing, bonding, etc., or the mounting groove does not penetrate the base. In this embodiment, the specific structure of the spirit level 5 and the installation method of the spirit level 5 are not limited, as long as the spirit level 5 can be fixedly installed on the mounting plate 1.

[0034] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still make modifications to the technical solutions described in the foregoing embodiments without creative efforts, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A fixture for column tooth inlay, characterized in that, It includes a base, on which there is a positioning hole for clearance fit with a column tooth, and a spirit level for measuring the axial inclination angle of the positioning hole is fixedly installed on the base. The base includes a mounting plate and a cantilever beam connected to the mounting plate. The positioning hole is arranged on the cantilever beam, and the spirit level is installed on the mounting plate.

2. The fixture for column tooth inlay as described in claim 1, characterized in that, The positioning hole is located at the end of the cantilever beam.

3. The jig for column tooth inlay according to claim 2, characterized in that An observation window communicating with the middle part of the positioning hole is provided at the end of the cantilever beam.

4. The fixture for column tooth inlay according to claim 3, characterized in that, The end of the cantilever beam has a rounded corner transition, and the observation window is a fan-shaped ring observation window.

5. The fixture for column tooth inlay according to any one of claims 1-4, characterized in that, The cantilever beam and the spirit level are respectively located on two opposite sides of the mounting plate.

6. The fixture for column tooth inlay according to any one of claims 1-4, characterized in that There is a mounting groove on the base, and the spirit level is installed in the mounting groove.

7. The jig for column tooth inlay according to claim 6, characterized in that, The mounting groove is a U-shaped groove penetrating the base.

8. The fixture for column tooth inlay according to any one of claims 1-4, characterized in that The spirit level is a magnetic spirit level.

9. The fixture for column tooth inlay according to any one of claims 1-4, characterized in that There are two cantilever beams arranged at intervals along the axial direction of the positioning hole.

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