Long hole drill bit stabilizer

Abstract

The embodiment of the utility model provides a long hole drill bit stabilizer. According to the method, a drill bit stabilizer body and at least one expanding ring are included, the expanding ring is arranged on the drill bit stabilizer body in a sleeving mode, the drill bit stabilizer body comprises an annular drill bit output port and a rib assembly, and the rib assembly comprises a plurality of fixing ribs arranged in a surrounding mode; one end of each fixing rib is connected with the drill bit output port; a limiting piece used for allowing a drill bit to penetrate through is arranged in the drill bit output port and used for limiting the vibration range of the drill bit. The diameter expanding ring is arranged on the multiple fixing ribs in a sleeving mode, and the diameter expanding ring slides on the fixing ribs so that the distance between the fixing ribs can be changed. The method is used for achieving the effect of improving the machining stability of the long-hole drill bit.

Description

Technical Field

[0001] This application relates to the technical field of drill bits, and particularly to a stabilizer for a long-hole drill bit. Background Art

[0002] With the replacement of mechanical equipment and the improvement of automation level, as well as the increasing requirements for product precision and processing efficiency by people, the requirements for the performance of processing tools are also gradually increasing. Especially in the fields of aerospace, automobile manufacturing, etc., the requirements for the precision, surface quality and processing efficiency of parts are very high. The emergence of long-hole drill bits can help achieve precision machining of long holes or deep holes, so as to drill long holes or deep holes on workpieces to meet specific design needs and processing requirements.

[0003] In the prior art, when using a long-hole drill bit for deep-hole or long-hole drilling, due to the action of material cutting force, the drill bit is prone to vibration or deviation, thereby affecting the stability during the processing of the long-hole drill bit. Utility Model Content

[0004] The embodiments of this application provide a stabilizer for a long-hole drill bit to achieve the effect of improving the stability during the processing of the long-hole drill bit.

[0005] The embodiments of this application provide the following technical solutions to solve the above technical problems:

[0006] The embodiments of this application provide a stabilizer for a long-hole drill bit, including: a drill bit stabilizer body and at least one diameter-expanding ring. The diameter-expanding ring is sleeved on the drill bit stabilizer body. The drill bit stabilizer body includes an annular drill bit outlet and a rib assembly. The rib assembly includes a plurality of fixed ribs arranged in a surrounding manner. One end of each fixed rib is respectively connected to the drill bit outlet. A limiting member for passing through the drill bit is arranged in the drill bit outlet. The limiting member is used to limit the vibration range of the drill bit. The diameter-expanding ring is sleeved on the plurality of fixed ribs, and the diameter-expanding ring slides on the fixed ribs to change the distance between the fixed ribs.

[0007] Advantages of the embodiments of the present application: The long-hole drill stabilizer provided by the embodiments of the present application can limit the vibration range of the drill by arranging a limiting member in the drill outlet, effectively reducing the vibration amplitude of the drill, and thus improving the machining accuracy. By arranging a rib assembly on the drill outlet and sleeving an expansion ring outside the rib assembly, the distance between the fixed ribs can be changed during the sliding process of the expansion ring on the rib assembly, so as to adjust and optimize the working position of the drill, thereby improving the stability during the machining of the long-hole drill. Moreover, the setting of the expansion ring makes the long-hole drill stabilizer have greater flexibility and applicability. The change in the position of the expansion ring on the rib assembly can change the distance between the fixed ribs, so as to adapt to the working environments of different situations and improve the versatility of the equipment.

[0008] In a possible implementation manner, the limiting member is a bearing. The outer ring of the bearing contacts the inner surface of the drill outlet, and the inner ring of the bearing contacts the drill. The drill rotates to drive the bearing to rotate in the drill outlet.

[0009] In a possible implementation manner, the other ends of each fixed rib are respectively connected to a limiting piece. A locking portion is arranged on the limiting piece. When the expansion ring slides on the fixed rib to the other end of the fixed rib, it abuts against the locking portion.

[0010] In a possible implementation manner, the inner diameter of the rib assembly gradually increases from the drill outlet to the limiting piece.

[0011] In a possible implementation manner, a dovetail groove is formed on each fixed rib. The dovetail groove starts from the drill outlet and ends at the limiting piece. A plurality of sliding blocks are arranged on the inner side of each expansion ring. Each sliding block is connected to the inner surface of the expansion ring and extends radially inwards along the expansion ring. The expansion ring can slide on the dovetail groove through the sliding blocks.

[0012] In a possible implementation manner, the length of the sliding block on each expansion ring is greater than or equal to the depth of the dovetail groove.

[0013] In a possible implementation manner, the length of the sliding block on each expansion ring is proportional to the size of the expansion ring.

[0014] In a possible implementation manner, the difference in the length of the sliding blocks on two adjacent expansion rings is greater than or equal to the thickness of the expansion ring.

[0015] In a possible implementation manner, a guiding groove is arranged on one side of the dovetail groove close to the drill outlet. The depth of the guiding groove gradually increases along the direction from the drill outlet to the limiting piece.

[0016] In a possible implementation, the plurality of the fixed ribs are evenly spaced, and there is a gap between two adjacent fixed ribs.

[0017] In addition to the technical problems solved by the present application, the technical features constituting the technical solution, and the beneficial effects brought by the technical features of these technical solutions described above, other technical problems that the long-hole drill stabilizer provided by the present application can solve, other technical features included in the technical solution, and the beneficial effects brought by these technical features will be further described in detail in the specific implementation manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings herein are incorporated into the specification and form a part of the specification, showing embodiments consistent with the present application, and are used together with the specification to explain the principles of the present application.

[0019] Figure 1 It is a schematic structural diagram of the long-hole drill stabilizer provided by the present application;

[0020] Figure 2 It is a schematic structural diagram of the diameter-expanding ring of the long-hole drill stabilizer provided by the present application.

[0021] Description of the reference numerals:

[0022] 100, drill stabilizer body; 101, drill outlet; 102, fixed rib; 103, bearing; 200, dovetail groove; 300, slider; 400, diameter-expanding ring; 500, limiting piece.

[0023] Through the above drawings, the clear embodiments of the present application have been shown, and there will be more detailed descriptions hereinafter. These drawings and the textual descriptions are not intended to limit the scope of the concept of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] Here, the exemplary embodiments will be described in detail, and the examples are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0025] In the related art, in order to perform precision machining on long holes or deep holes, drill long holes or deep holes in a workpiece, and thus meet specific design requirements and machining requirements, it is usually necessary to use a special long-hole drill bit for machining. However, when using a long-hole drill bit for deep-hole or long-hole drilling, due to the action of the material cutting force, the drill bit is prone to vibration or deviation, thereby affecting the stability during the machining of the long-hole drill bit.

[0026] In view of this, in the embodiments of the present application, by providing a limiting member in the drill bit outlet, it can limit the vibration range of the drill bit, effectively reduce the vibration amplitude of the drill bit, and thus improve the machining accuracy. By providing a rib assembly on the drill bit outlet and sleeving an expansion ring outside the rib assembly, the distance between the fixed ribs can be changed during the sliding of the expansion ring on the rib assembly, and thus the working position of the drill bit can be adjusted and optimized, thereby improving the stability during the machining of the long-hole drill bit.

[0027] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0028] Figure 1 It is a schematic structural diagram of a long-hole drill bit stabilizer provided by the present application. As Figure 1 shown, the long-hole drill bit stabilizer includes a drill bit stabilizer body 100 and at least one expansion ring 400. The expansion ring 400 is sleeved on the drill bit stabilizer body 100. The drill bit stabilizer body 100 includes an annular drill bit outlet 101 and a rib assembly. The rib assembly includes a plurality of fixed ribs 102 arranged in a surrounding manner. One end of each fixed rib 102 is respectively connected to the drill bit outlet 101; a limiting member for passing through the drill bit is provided in the drill bit outlet 101, and the limiting member is used to limit the vibration range of the drill bit; the expansion ring 400 is sleeved on the plurality of fixed ribs 102, and the expansion ring 400 slides on the fixed ribs 102 to change the distance between the respective fixed ribs 102. That is to say, the drill bit outlet 101 can provide an outlet for the drill bit and is connected to the fixed ribs 102 to provide a support and connection point for it. The fixed ribs 102 can provide additional support to prevent the drill bit from vibrating excessively during the drilling process, and the other end of the fixed ribs 102 cooperates with the expansion ring 400 to adjust the distance between the respective fixed ribs 102 through the sliding of the expansion ring 400. That is, by sliding the expansion ring 400 on the fixed ribs 102, the inner diameter size of the rib assembly is changed to adapt to different working conditions.

[0029] By setting a limiting member in the drill bit outlet 101, the vibration range of the drill bit can be effectively restricted, thereby reducing the vibration amplitude and improving the machining accuracy. In addition, by installing a rib assembly on the drill bit outlet 101 and sleeving an expanding ring 400 outside the rib assembly, the expanding ring 400 can slide on the rib assembly, thereby changing the distance between the fixed ribs 102. This design endows the long-hole drill bit stabilizer with greater flexibility and applicability and enables the long-hole drill bit stabilizer to adapt to different working environments, improving the versatility of the equipment.

[0030] In a possible implementation manner, the limiting member is a bearing 103. The outer ring of the bearing 103 contacts the inner surface of the drill bit outlet 101, and the inner ring of the bearing 103 contacts the drill bit. The drill bit rotates to drive the bearing 103 to rotate in the drill bit outlet 101. Specifically, the outer ring of the bearing 103 contacts the inner surface of the drill bit outlet 101, while the inner ring of the bearing 103 contacts the drill bit. When the drill bit rotates, the bearing 103 also rotates in the drill bit outlet 101 accordingly. This design can not only effectively restrict the vibration range of the drill bit, but also reduce friction, improving the rotational stability and machining accuracy of the drill bit.

[0031] In a possible implementation manner, the other end of each fixed rib 102 is respectively connected to a limiting piece 500. The limiting piece 500 is provided with a locking portion. When the expanding ring 400 slides on the fixed rib 102 to the other end of the fixed rib 102, it abuts against the locking portion.

[0032] Optionally, the limiting piece 500 and the locking portion are of an arc plate structure. The limiting piece 500 is connected to the end of the fixed rib 102 far from the drill bit outlet 101 through the locking portion, and there is an angle between the limiting piece 500 and the locking portion. Preferably, the locking portion is vertically connected to the fixed rib 102, and the width of the locking portion is greater than the thickness of the expanding ring 400. Through the above settings, the locking portion can limit the sliding range of the expanding ring 400 on the fixed rib 102. When the expanding ring 400 slides to the edge of the fixed rib 102 far from the drill bit outlet 101, the locking portion can abut against the expanding ring 400.

[0033] Furthermore, the center of the arc plate-shaped limiting piece 500 can coincide with the center of the drill bit outlet 101, and the distance between the limiting piece 500 and the center is greater than the radius of the drill bit outlet 101. Furthermore, the long-hole drill bit stabilizer can be clamped in the working hole through the limiting piece 500, thereby improving the stability of the long-hole drill bit during operation.

[0034] In a possible implementation, the inner diameter of the rib assembly gradually increases from the drill bit outlet 101 to the limiting piece 500. That is to say, the distance between two opposite fixed ribs 102 can increase as the distance between it and the drill bit outlet 101 increases, that is, there is an angle between each fixed rib 102 and the horizontal plane. Through the above settings, the upper part size of the long-hole drill stabilizer is smaller than the lower part size. Furthermore, when the long-hole drill stabilizer enters the working position, the accuracy of its entering angle and position can be guaranteed. In addition, through the above settings, a larger chip removal space can be provided for the long-hole drill stabilizer, thereby reducing the accumulation of chips during the machining process, preventing blockage, and improving the machining efficiency and quality. The larger chip removal space also helps to reduce the accumulation of heat, lower the temperatures of the long-hole drill and the workpiece, and improve the stability and safety of the long-hole drill during the machining process.

[0035] Figure 2 FIG. 4 is a schematic structural view of the diameter-expanding ring 400 of the long-hole drill stabilizer provided by the present application. The following will further describe the structure of the diameter-expanding ring 400 in conjunction with Figure 2 FIG. 5.

[0036] In a possible implementation, a dovetail groove 200 is formed on each fixed rib 102. The dovetail groove 200 starts from the drill bit outlet 101 and ends at the limiting piece 500; a plurality of sliders 300 are arranged on the inner side of each diameter-expanding ring 400. Each slider 300 is connected to the inner surface of the diameter-expanding ring 400 and extends radially inwards along the diameter-expanding ring 400. The diameter-expanding ring 400 can slide on the dovetail groove 200 through the slider 300. That is to say, a dovetail groove 200 is provided on each fixed rib 102, and the number of sliders 300 on each diameter-expanding ring 400 is the same as the number of dovetail grooves 200. Furthermore, the diameter-expanding ring 400 can slide on the dovetail groove 200 through the slider 300. Through the above settings of the dovetail groove 200 and the slider 300, the dovetail groove 200 can provide stable sliding guidance for the slider 300, thereby preventing the diameter-expanding ring 400 from shifting and loosening during the sliding process. Moreover, through the settings of the slider 300 and the dovetail groove 200, the diameter-expanding ring 400 can accurately adjust the distance between each fixed rib 102. In addition, the design of the dovetail groove 200 and the slider 300 increases the contact area between the diameter-expanding ring 400 and the fixed rib 102, disperses stress, and improves the strength and durability of the structure.

[0037] In a possible implementation, the length of the slider 300 on each diameter-expanding ring 400 is greater than or equal to the depth of the dovetail groove 200. Through the above setting, better guidance can be provided for the diameter-expanding ring 400. The length of the slider 300 being greater than or equal to the depth of the dovetail groove 200 enables the slider 300 to have a sufficient contact area in the dovetail groove 200. Furthermore, a better guiding effect is provided to prevent the slider 300 from tilting or shifting during the sliding process. The length of the slider 300 being greater than or equal to the depth of the dovetail groove 200 can also more effectively fill the dovetail groove 200, reduce the sway of the slider 300 in the dovetail groove 200, and improve the smoothness of the sliding.

[0038] In a possible implementation, the length of the slider 300 on each diameter-expanding ring 400 is proportional to the size of the diameter-expanding ring 400. That is to say, the long-hole drill stabilizer provided in this application can sleave a single diameter-expanding ring 400 on the rib assembly or stack multiple diameter-expanding rings 400 on the rib assembly. The larger the size of the diameter-expanding ring 400, the longer the corresponding length of the slider 300, enabling multiple diameter-expanding rings 400 to be stacked on the rib assembly. Through the above setting, the long-hole drill stabilizer can select to use a single diameter-expanding ring 400 or stack multiple diameter-expanding rings 400 according to specific working requirements, providing flexibility and adaptability. Moreover, by selecting different sizes of the diameter-expanding ring 400, the long-hole drill stabilizer can be adapted to working environments with different hole diameters and depths, improving the versatility of the equipment.

[0039] In a possible implementation, a single diameter-expanding ring 400 is sleaved alone on the long-hole drill stabilizer. The diameter of this diameter-expanding ring 400 is D1, and the corresponding length of the slider 300 is L1. Under this working condition, only this diameter-expanding ring 400 is needed to provide restraint. The specific operation process is as follows: First, insert the slider 300 of this diameter-expanding ring 400 into the dovetail groove 200 on the side close to the drill outlet 101, and push this diameter-expanding ring 400 to slide it to the required position, so that this diameter-expanding ring 400 can provide restraint and support for the rib assembly. Second, insert the long-hole drill stabilizer into the working position. Due to the effect of this diameter-expanding ring 400, the inner diameter of the rib assembly can meet the size requirements of the working position, and then it can be clamped in the working position through the limiting piece 500. Finally, insert the long-hole drill into the long-hole drill stabilizer from the side close to the limiting piece 500, and pass through the long-hole drill stabilizer through the limiting part in the drill outlet 101.

[0040] In a possible implementation, the length difference between the sliders 300 on two adjacent diameter-expanding rings 400 is greater than or equal to the thickness of the diameter-expanding ring 400. With the above arrangement, the length difference between the sliders 300 of two adjacent diameter-expanding rings 400 is greater than or equal to the thickness of the diameter-expanding ring 400, ensuring that the two adjacent diameter-expanding rings 400 do not interfere with each other when stacked, and thus enabling the diameter-expanding rings 400 to be stacked smoothly to provide stable support. Moreover, with the above arrangement, the possible shaking generated by multiple diameter-expanding rings 400 during operation can be reduced, improving the stability and machining accuracy of the equipment.

[0041] In a possible implementation, multiple diameter-expanding rings 400 can be sleeved on the long-hole drill stabilizer. For example, a diameter-expanding ring 400 of the first size, a diameter-expanding ring 400 of the second size, and a diameter-expanding ring 400 of the third size are sleeved on the long-hole drill stabilizer. The diameter of the diameter-expanding ring 400 of the first size is D1, the length of the corresponding slider 300 is L1, and the thickness of the diameter-expanding ring 400 of the first size is H1. The diameter of the diameter-expanding ring 400 of the second size is D2, the length of the corresponding slider 300 is L2, and the thickness of the diameter-expanding ring 400 of the second size is H2. The diameter of the diameter-expanding ring 400 of the third size is D3, the length of the corresponding slider 300 is L3, and the thickness of the diameter-expanding ring 400 of the third size is H3. The size relationship of the diameter-expanding ring 400 of the first size, the diameter-expanding ring 400 of the second size, and the diameter-expanding ring 400 of the third size is that the third size is greater than the second size and the second size is greater than the first size. And L3 - L2 = H2, L2 - L1 = H1. Under this working condition, the above three sizes of diameter-expanding rings 400 are required to provide constraints for the rib assembly.

[0042] The specific operation process is as follows: First, insert the slider 300 of the expanding ring 400 with the first dimension into the dovetail groove 200 on the side close to the drill bit outlet 101, and push the expanding ring 400 with the first dimension to slide it to the required position, so that the expanding ring 400 with the first dimension can provide constraints and support for the rib assembly. Second, insert the slider 300 of the expanding ring 400 with the second dimension into the dovetail groove 200 on the fixed rib 102, and slide it above the expanding ring 400 with the first dimension, so that the expanding ring 400 with the second dimension can be stacked on the expanding ring 400 with the first dimension, thereby providing additional constraints and support for the rib assembly. Third, insert the slider 300 of the expanding ring 400 with the third dimension into the dovetail groove 200 on the fixed rib 102, and slide it above the expanding ring 400 with the second dimension, so that the expanding ring 400 with the third dimension can be stacked on the expanding ring 400 with the second dimension, thereby providing additional constraints and support for the rib assembly. Then, insert the long-hole drill stabilizer into the working position. Due to the action of the three mutually stacked expanding rings 400, the inner diameter of the rib assembly can meet the dimensional requirements of the working position, and then it can be clamped in the working position through the limiting piece 500. Finally, insert the long-hole drill from the side of the long-hole drill stabilizer close to the limiting piece 500, and pass through the long-hole drill stabilizer through the limiting part in the drill bit outlet 101.

[0043] In a possible implementation manner, a guiding groove is provided on the side of the dovetail groove 200 close to the drill bit outlet 101, and the depth of the guiding groove gradually increases along the direction from the drill bit outlet 101 to the limiting piece 500. That is to say, the guiding groove provides a transition zone, enabling the slider 300 to smoothly enter the dovetail groove 200 from the guiding groove, reducing the resistance and jamming phenomenon during the installation process. Moreover, the design of the guiding groove can help the slider 300 to align before entering the dovetail groove 200 to ensure that the slider 300 can be correctly embedded in the dovetail groove 200, improving the installation accuracy.

[0044] In a possible implementation manner, the multiple fixed ribs 102 are evenly distributed, and there are gaps between adjacent two fixed ribs 102. Through the above settings, the stress can be evenly dispersed between the respective fixed ribs 102, reducing local stress concentration and improving the stability and durability of the overall structure. In addition, through the above settings, the gaps existing between adjacent fixed ribs 102 can provide space for chip evacuation, preventing chips from accumulating during the machining process, thereby reducing blockage and improving the machining efficiency and quality of the long-hole drill. Moreover, through the above settings, the heat dissipation effect can also be enhanced, reducing the temperature of the long-hole drill and the workpiece, and improving the stability and safety of the machining process.

[0045] It should be noted that: in this application, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below" and "beneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0046] In addition, in this application, unless otherwise clearly specified and defined, terms such as "mounted", "connected", "coupled", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be directly connected, or indirectly connected through an intermediate medium, and may be the internal connection of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0047] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0048] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them; although this application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A long hole drill stabilizer, characterized in that: The drill bit stabilizer comprises a drill bit stabilizer body (100) and at least one diameter expansion ring (400), wherein the diameter expansion ring (400) is sleeved on the drill bit stabilizer body (100), wherein The drill bit stabilizer body (100) comprises an annular drill bit outlet (101) and a rib assembly, wherein the rib assembly comprises a plurality of surrounding fixed ribs (102), and one end of each fixed rib (102) is respectively connected to the drill bit outlet (101); The drill output port (101) is provided with a stopper for inserting the drill, and the stopper is used to limit the vibration range of the drill; The diameter expansion ring (400) is sleeved on the plurality of fixed ribs (102), and the diameter expansion ring (400) slides on the fixed ribs (102) to change the distance between each fixed rib (102).

2. The long hole drill stabilizer according to claim 1, characterized in that: The limiting member is a bearing (103), the outer ring of the bearing (103) contacts the inner surface of the drill output port (101), the inner ring of the bearing (103) contacts the drill, and the drill rotates to drive the bearing (103) to rotate in the drill output port (101).

3. The long hole drill stabilizer according to claim 1, characterized in that: The other end of each of the fixed ribs (102) is respectively connected to a limiting plate (500), and a locking portion is provided on the limiting plate (500). When the diameter expansion ring (400) slides on the fixed rib (102) to the other end of the fixed rib (102), it abuts against the locking portion.

4. The long hole drill stabilizer according to claim 3, characterized in that: The inner diameter of the rib assembly gradually increases from the drill output port (101) to the limiting plate (500).

5. The long hole drill stabilizer according to claim 4, characterized in that: A dovetail groove (200) is formed on each of the fixed ribs (102), wherein the dovetail groove (200) starts from the drill output port (101) and ends at the limiting plate (500); A plurality of sliders (300) are arranged on the inner side of each of the diameter expansion rings (400); each of the sliders (300) is connected to the inner surface of the diameter expansion ring (400) and extends radially inward along the diameter expansion ring (400); and the diameter expansion ring (400) can slide on the dovetail groove (200) through the sliders (300).

6. The long hole drill stabilizer according to claim 5, characterized in that: The length of the sliding block (300) on each of the diameter expansion rings (400) is greater than or equal to the depth of the dovetail groove (200).

7. The long hole drill stabilizer according to claim 6, characterized in that: The length of the sliding block (300) on each of the diameter expansion rings (400) is proportional to the size of the diameter expansion ring (400).

8. The long hole drill stabilizer according to claim 7, characterized in that: The length difference between the sliding blocks (300) on two adjacent diameter expansion rings (400) is greater than or equal to the thickness of the diameter expansion ring (400).

9. The long hole drill stabilizer according to claim 5, characterized in that: A guide groove is provided on one side of the dovetail groove (200) close to the drill output port (101), and the depth of the guide groove gradually increases along the drill output port (101) towards the limiting plate (500).

10. The long hole drill stabilizer according to claim 1, characterized in that: The plurality of fixed ribs (102) are distributed at equal intervals, and there is a gap between two adjacent fixed ribs (102).

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