Positioning itself as a top-tier institution and rock drilling rig

Abstract

This application provides a positioning center, a centering mechanism, and a rock drilling rig, comprising: a base body with a first connecting portion and a second connecting portion, the first connecting portion being connected to the output end of a drive mechanism, and the second connecting portion located on the outer peripheral sidewall of the front end of the base body; and a plurality of first support members, each of the first support members having a first part and a second part at its axial ends, each first part being connected to the second connecting portion, the plurality of first support members being arranged sequentially along the circumference of the second connecting portion, each first support member being obliquely forward in a direction away from the axial centerline of the base body, and each second part being used to abut against a target object, wherein the second parts of the plurality of first support members together constitute a support body, and the projected area of ​​the support body in the axial direction of the base body is larger than the axial projected area of ​​the base body itself. This can improve contact stability, thereby improving the straightness of the drilling.

Description

Technical Field

[0001] This application relates to the field of rock drilling rig technology, and in particular to a positioning tip, a tip mechanism, and a rock drilling rig. Background Technology

[0002] The top mechanism is used to extend outward and abut against a pre-set target before drilling operations, thereby providing stable support and positioning for the drilling mechanism during the drilling process.

[0003] Chinese invention patent CN103485714B discloses a drilling mechanism and drilling machine, including: a drill arm, with an external device connected to one end of the drill arm; a bracket connected to the other end of the drill arm; the drill arm includes an outer cylinder and an inner cylinder; the end of the inner cylinder is hinged to one side of a hinge seat; a pusher tilting cylinder is fixed to the other side of the hinge seat; the pusher tilting cylinder is connected to a pusher swing cylinder arranged perpendicularly thereto via an L-shaped plate; both the pusher tilting cylinder and the pusher swing cylinder are rotary cylinders; wherein, the outer cylinder of the pusher tilting cylinder is fixed to the hinge seat; the inner cylinder of the pusher tilting cylinder is fixed to the outer wall of the L-shaped plate; the outer cylinder of the pusher swing cylinder is fixed to the inner wall of the L-shaped plate; the inner cylinder of the pusher swing cylinder is fixed to the bracket; a slide is slidably arranged on the bracket, wherein a slide telescopic cylinder is arranged inside the slide, one end of the slide telescopic cylinder is fixed to a positioning center, and the other end of the slide telescopic cylinder is fixed inside the slide; a drill bit is clamped on the positioning center.

[0004] In the aforementioned prior art, although contact is achieved between the positioning tip and the preset target, the structural design of the positioning tip results in a small contact area between the positioning tip and the preset target, which in turn leads to insufficient contact stability between the positioning tip and the preset target, affecting the straightness of the drilling. Summary of the Invention

[0005] This application provides a positioning center, a centering mechanism, and a rock drilling rig to solve the problems existing in related technologies. The technical solution is as follows: In a first aspect, embodiments of this application provide a method for locating a top edge, including: A base body, the base body having a first connecting portion and a second connecting portion, the first connecting portion being used to connect to the output end of a drive mechanism, the second connecting portion being located on the outer peripheral sidewall of the front end of the base body, and the second connecting portion being arranged around the axial centerline of the base body; and Multiple first support members are provided, each of which has a first part and a second part at its axial ends. Each first part is connected to a second connecting part. The multiple first support members are arranged sequentially along the circumference of the second connecting part. Each first support member is obliquely forward in a direction away from the axial center line of the seat body. Each second part is used to abut against the target object. The second parts of the multiple first support members together constitute a support body. The projected area of ​​the support body on the axial direction of the seat body is larger than the axial projected area of ​​the seat body itself.

[0006] In one embodiment, each of the second parts is provided with a plurality of support teeth, which are arranged sequentially around the axial center line of the corresponding first support member, and the support teeth are used to abut against the target.

[0007] In one embodiment, in the same first support member, the projected area of ​​the plurality of support teeth in the axial direction of the first support member is greater than the projected area of ​​the first portion in the axial direction of the first support member.

[0008] In one embodiment, the cross-section of each of the support teeth gradually decreases from the direction away from the first portion.

[0009] In one embodiment, each of the support teeth is provided with a first support portion and a second support portion. The first support portion is connected to the first portion at one end along the axial direction of the first support member, and the second support portion is provided at the other end of the first support portion along the axial direction of the first support member. The cross-sections of the second support portion and the first support portion gradually decrease from the direction away from the first portion, and the maximum cross-section of the second support portion is equal to or greater than the maximum cross-section of the first support portion.

[0010] In one embodiment, the second connecting portion has a plurality of first connecting holes, which are arranged sequentially along the circumference of the second connecting portion; Each of the first portions is inserted into the corresponding first connecting hole, and each of the first portions is welded together with the second connecting portion; or, each of the first portions is inserted into the corresponding first connecting hole, and each of the first portions is threadedly connected to the corresponding first connecting hole.

[0011] In one embodiment, the cross-section of the second connecting portion gradually decreases from back to front along the axial direction of the seat body; And / or, the front end face of the seat is located at one axial end of the seat, the front end face of the seat is close to the second connecting part, and the front end face of the seat has a groove, the groove being arranged around the axial center line of the seat; And / or, the positioning tip further includes: The second support member also has a first part and a second part at both axial ends. The first part of the second support member is connected to the front end face of the seat body. The front end face of the seat body is located at one axial end of the seat body and is close to the second connecting part. The second part of the second support member is used to abut against the target object.

[0012] Secondly, embodiments of this application also provide a top-level institution, including: A drive mechanism, the drive mechanism being used to connect to a carrier; and The aforementioned positioning tip has its first connecting portion connected to the output end of the drive mechanism, so that the positioning tip can extend and retract with the output end of the drive mechanism.

[0013] In one embodiment, the first connecting portion has a second connecting hole and a third connecting hole. The second connecting hole extends axially along the base and engages with the output end of the drive mechanism. The third connecting hole extends radially along the base and communicates with the second connecting hole. The third connecting hole also penetrates both radial sides of the first connecting portion along the base. The top institutions also include: The fastener has a head that abuts against the first connecting portion along the radial side of the seat, and the rod portion of the fastener passes through the third connecting hole and the output end of the drive mechanism. A locking member is screwed to the rod portion of the fastener, and the locking member abuts against the first connecting portion on the other side of the seat along the radial direction.

[0014] Thirdly, embodiments of this application also provide a rock drilling rig, including the aforementioned positioning center.

[0015] The advantages or beneficial effects of the above technical solutions include at least the following: The positioning tip of the present invention has a second connecting portion on the outer peripheral sidewall of the front end of the base. The cross-section of the second connecting portion gradually narrows from back to front along the axial direction of the base to form a tapered inclined surface that extends forward and is inclined toward the axial centerline of the base. This inclined second connecting portion can provide a stable mounting base for the first support member and also provides a basis for expanding the target contact support area. Multiple first support members are arranged sequentially along the circumferential direction on the second connecting portion. Each first support member is inclined forward in a direction away from the axial centerline of the base. The second parts of the multiple first support members together constitute a support body. The projected area of ​​the support body in the axial direction of the base body is larger than the axial projected area of ​​the base body itself. That is, the target contact support area D formed by the second parts of the multiple first support members is larger than the cross-sectional area of ​​the base body. This can increase the contact area between the positioning tip and the target, thereby improving the contact stability between the positioning tip and the target, thus improving the support and positioning stability, and ultimately improving the straightness of the drilling.

[0016] The above overview is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of this application will become readily apparent from the accompanying drawings and the following detailed description. Attached Figure Description

[0017] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the various drawings denote the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings depict only some embodiments disclosed in this application and should not be construed as limiting the scope of this application.

[0018] Figure 1 This is a three-dimensional structural diagram of the top mechanism of the present invention from a first-view perspective. Figure 2 for Figure 1 A cross-sectional view along the AA direction; Figure 3 This is a three-dimensional structural diagram of the top mechanism of the present invention from a second perspective. Figure 4 for Figure 3 A cross-sectional view along the BB direction in the middle; Figure 5 This is a three-dimensional structural diagram of the top mechanism of the present invention from a third-person perspective. Figure 6 This is a partially enlarged view of the top mechanism of the present invention.

[0019] Figure Labels 1. Base; 11. First connecting part; 111. Second connecting hole; 112. Third connecting hole; 12. Second connecting part; 121. First connecting hole; 13. Front end face; 131. Groove; 2. First support member; 21. First part; 22. Second part; 221. Support tooth; 2211. First support part; 2212. Second support part; 3. Drive mechanism; 31. Output end; 4. Fastener; 5. Locking member; 6. Connecting seat; 61. Screw hole; 7. Second bolt. Detailed Implementation

[0020] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this application. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0021] See Figures 1-6 This illustrates a preferred embodiment of the present invention for positioning a top, comprising: The base 1 has a first connecting part 11 and a second connecting part 12. The first connecting part 11 is used to connect to the output end 31 of the drive mechanism 3 to securely mount the base 1 onto the output end 31 of the drive mechanism 3. The second connecting part 12 is located on the outer peripheral side wall of the front end of the base 1. It can be understood that the front end of the base 1 is closer to the target object. The second connecting part 12 is arranged around the axial centerline of the base 1. The cross-section of the second connecting part 12 gradually decreases from back to front along the axial direction of the base 1, that is, the second connecting part 12 is inclined towards the target object and the axial centerline of the base 1 to form a tapered portion with a cross-section that gradually decreases from back to front along the axial direction of the base 1. Multiple first support members 2 are provided, each with a first part 21 and a second part 22 at both axial ends. That is, the first support member 2 has a first part 21 at one axial end and a second part 22 at the other axial end. Each first part 21 is connected to a second connecting part 12 so that each first support member 2 is stably installed on the second connecting part 12. The multiple first support members 2 are arranged sequentially along the circumference of the second connecting part 12. Each first support member 2 is obliquely forward in the direction away from the axial center line of the base body 1. That is, the first support member 2 is obliquely outward and extends forward relative to the front end of the base body 1. Each second part 22 is used to abut against the target object, thereby providing stable support and positioning for the drilling mechanism during the drilling process. The second parts 22 of the multiple first support members 2 together constitute a support body. The projected area of ​​the support body in the axial direction of the base body 1 is larger than the axial projected area of ​​the base body 1 itself.

[0022] The positioning tip of the present invention has a second connecting part 12 provided on the outer peripheral side wall of the front end of the base 1. The cross-section of the second connecting part 12 gradually narrows from back to front along the axial direction of the base 1 to form a conical inclined surface that extends forward and is inclined toward the axial center line of the base 1. This inclined second connecting part 12 can provide a stable mounting base for the first support member 2, and also provides a basis for expanding the target contact support area. Multiple first support members 2 are arranged sequentially along the circumference on the second connecting part 12. Each first support member 2 is inclined forward in a direction away from the axial center line of the base 1. The second part 22 of the multiple first support members 2 together constitute a support body. The projected area of ​​the support body in the axial direction of the base 1 is larger than the axial projected area of ​​the base 1 itself. That is, the target contact support area D formed by the second part 22 of the multiple first support members 2 is larger than the cross-sectional area of ​​the base 1. This can increase the contact area between the positioning tip and the target, thereby improving the contact stability between the positioning tip and the target, thus improving the support and positioning stability, and ultimately improving the straightness of the drilling.

[0023] See Figures 1-6 In one embodiment, each second part 22 is provided with multiple support teeth 221, which are arranged sequentially around the axial center line of the corresponding first support member 2. The support teeth 221 are used to abut against the target object. Since each second part 22 of each first support member 2 is provided with multiple support teeth 221, and the multiple support teeth 221 of each second part 22 are arranged sequentially around the axial center line of the corresponding first support member 2, all the support teeth 221 of all the first support members 2 together form a multi-tooth structure. This multi-tooth structure helps to further increase the contact area between the positioning tip and the target object, thereby further improving the contact stability between the positioning tip and the target object, thereby further improving the support and positioning stability, and ultimately further improving the straightness of the drilling. In addition, the combination of this multi-tooth structure and the outward tilting arrangement of the first support member 2 makes the multiple support teeth 221 distributed on different horizontal planes, so that the positioning tip can effectively adapt to complex targets with uneven surfaces, ultimately improving the contact stability between the positioning tip and complex targets, and expanding the applicability of the positioning tip.

[0024] See Figure 1 It is understandable that, among all the support teeth 221, the multi-tooth structure formed by the multiple support teeth 221 located on the outermost ring has a projected area in the axial direction of the seat body 1 that is larger than the axial projected area of ​​the seat body 1 itself.

[0025] See Figures 1-6In one embodiment, in the same first support member 2, the projected area of ​​multiple support teeth 221 in the axial direction of the first support member 2 is greater than the projected area of ​​the first part 21 in the axial direction of the first support member 2, so as to further increase the contact area between the positioning tip and the target, thereby further improving the contact stability between the positioning tip and the target, thereby further improving the support and positioning stability, and ultimately further improving the drilling straightness.

[0026] See Figures 1-6 In one embodiment, the cross-section of each support tooth 221 gradually decreases from the direction away from the first part 21, so that the cross-section of the end of the support tooth 221 near the first part 21 is larger, thereby increasing the connection stability between the support tooth 221 and the first part 21, and making the cross-section of the support tooth 221 away from the first part 21 smaller, which helps to improve the adaptability of the support tooth 221 to objects with different surface morphologies (e.g., easier to fit uneven surfaces).

[0027] See Figure 1 In one embodiment, each support tooth 221 is provided with a first support portion 2211 and a second support portion 2212. The first support portion 2211 is connected to the first portion 21 at one end along the axial direction of the first support member 2, and the second support portion 2212 is provided at the other end of the first support portion 2211 along the axial direction of the first support member 2. The cross-sections of both the second support portion 2212 and the first support portion 2211 gradually decrease from the direction away from the first portion 21, that is, both the second support portion 2212 and the first support portion 2211 are tapered structures, and the maximum cross-section of the second support portion 2212 is equal to The cross-section may be larger than the maximum cross-section of the first support portion 2211, so that multiple support surfaces are formed between the first support portion 2211, the second support portion 2212, and between the first support portion 2211 and the second support portion 2212. By having multiple support surfaces contact objects with different surface morphologies, the contact area between the positioning tip and the object can be further increased, thereby further improving the contact stability. In addition, the support tooth 221 with multiple support surfaces helps to further improve the adaptability of the support tooth 221 to objects with different surface morphologies (e.g., it is easier to fit uneven surfaces).

[0028] See Figure 2 To facilitate the installation of the first support member 2, in one embodiment, the second connecting part 12 has a plurality of first connecting holes 121, which are arranged sequentially along the circumference of the second connecting part 12. Each first part 21 is inserted into a corresponding first connecting hole 121, and each first part 21 is welded to the second connecting part 12, forming a welded part between the first part 21 and the second connecting part 12. This welded part surrounds the first part 21, so that the first support member 2 and the second connecting part 12 are firmly connected together, making the first support member 2 a non-removable connection. This connection method is suitable for use in working conditions where the target object is hard; or, each first part 21 is inserted into a corresponding first connecting hole 121, and each first part 21 is welded to the corresponding first connecting hole. The 121 threaded connection means that the first part 21 is provided with an external thread, and the first connecting hole 121 is provided with an internal thread that is compatible with the external thread, so that the first support member 2 and the second connecting part 12 can be detachably connected together, thereby facilitating the replacement of the first support member 2 with different shapes or structures. For example, the support teeth 221 can be replaced with sharp shapes such as sharp heads, so that the support teeth 221 can penetrate into the interior of rock, soil, and sandstone, thereby enhancing its support performance and making the contact surface more stable. This connection method is suitable for working conditions where the target object is a soft structure, such as rock, soil, sandstone, or other soft structures.

[0029] Of course, in other embodiments, the base 1 and the first support member 2 can also be made by integral molding to form an integral positioning tip.

[0030] See Figure 6 In one embodiment, the front end face 13 of the seat 1 is located at one axial end of the seat 1. The front end face 13 of the seat 1 is close to the second connecting part 12. It can be understood that the front end face 13 of the seat 1 is the end face of the seat 1 facing the target object. The front end face 13 of the seat 1 has a groove 131. The groove 131 is arranged around the axial center line of the seat 1. The existence of the groove 131 can better adapt to different targets. For example, when the target object is a hard structure, the groove 131 can achieve reverse support with the target object (such as protruding rocks) through the concave curvature space, thereby making the support performance more stable. When the target object is a soft structure, the groove 131 can accommodate and absorb the target object (such as rock, soil, sand and gravel) through the concave curvature space, so as to reduce the resistance of the drive end of the drive mechanism 3 to push the positioning tip. Similarly, the groove 131 can achieve reverse support with the target object through the concave curvature space.

[0031] See Figure 6 In one embodiment, there is one groove 131, which is an arc-shaped groove. The groove 131 is located in the middle of the front end face 13 of the seat body 1, and the axial center of the groove 131 coincides with the axial center of the seat body 1.

[0032] Of course, in other embodiments, there can be multiple grooves 131, and the multiple grooves 131 are arranged at intervals.

[0033] In one implementation, positioning the apex further includes: The second support member (not shown in the figure) also has a first part 21 and a second part 22 at both axial ends. The first part 21 of the second support member is connected to the front end face 13 of the base 1. The front end face 13 of the base 1 is located at one axial end of the base 1 and is close to the second connecting part 12. The second part 22 of the second support member is used to abut against the target object to further increase the contact area between the positioning tip and the target object, thereby further improving the contact stability.

[0034] It is understandable that the specific structure of the second support member can be the same as or different from that of the first support member 2, and the specific structure can be set according to the actual situation.

[0035] In one embodiment, the second support member can be connected to the base 1 by any connection method such as welding, threading, or integral molding.

[0036] See Figures 1-6 This illustrates a preferred embodiment of the present invention, comprising: Drive mechanism 3, drive mechanism 3 is used to connect with the carrier; and The aforementioned positioning tip has a first connecting part 11 connected to the output end 31 of the drive mechanism 3, so that the positioning tip can extend and retract with the output end 31 of the drive mechanism 3.

[0037] The tip mechanism of the present invention, by employing the aforementioned positioning tip, provides a second connecting portion 12 on the outer peripheral sidewall of the front end of the base 1. The cross-section of the second connecting portion 12 gradually narrows from back to front along the axial direction of the base 1 to form a tapered inclined surface extending forward and inclined toward the axial centerline of the base 1. This inclined second connecting portion 12 can provide a stable mounting base for the first support member 2, and also provides a basis for expanding the target contact support area. Multiple first support members 2 are sequentially arranged circumferentially on the second connecting portion 12. Each first support member 2 is inclined forward in a direction away from the axial centerline of the base 1. The second parts 22 of the multiple first support members 2 together constitute a support body. The projected area of ​​the support body in the axial direction of the base 1 is larger than the axial projected area of ​​the base 1 itself. That is, the target contact support area D formed by the second parts 22 of the multiple first support members 2 is larger than the cross-sectional area of ​​the base 1. This can increase the contact area between the positioning tip and the target, thereby improving the contact stability between the positioning tip and the target, thus improving the support and positioning stability, and ultimately improving the straightness of the drilling.

[0038] See Figure 4To achieve a reliable connection between the positioning tip and the drive mechanism 3, in one embodiment, the first connecting part 11 has a second connecting hole 111 and a third connecting hole 112. The second connecting hole 111 extends along the axial direction of the base 1 and cooperates with the output end 31 of the drive mechanism 3. The third connecting hole 112 extends along the radial direction of the base 1 and communicates with the second connecting hole 111. The third connecting hole 112 penetrates the first connecting part 11 on both sides of the base 1 along the radial direction. Top institutions also include: Fastener 4, the head of fastener 4 abuts against the first connecting part 11 on one radial side of the base body 1, and the rod of fastener 4 passes through the third connecting hole 112 and the output end 31 of the drive mechanism 3. Locking member 5 is screwed to the rod of fastener 4, and locking member 5 abuts against the first connecting part 11 on the other side of the radial direction of the seat body 1.

[0039] Specifically, the fastener 4 is a screw, and the locking element 5 is a nut.

[0040] See Figures 1-5 In one implementation, the top-level institution further includes: Connecting seat 6 supports drive mechanism 3 and is used to connect with carrier so that the top mechanism can be reliably installed on the carrier through connecting seat 6.

[0041] Specifically, the fixed end of the drive mechanism 3 is located inside the connecting seat 6. The fixed end of the drive mechanism 3 is connected to the connecting seat 6 by the first bolt. The back, both sides, and the plane away from the back of the connecting seat 6 and perpendicular to the connecting seat 6 are provided with screw holes 61. The screw holes 61 are connected to the carrier by the second bolt 7.

[0042] Specifically, the drive mechanism 3 is preferably a hydraulic cylinder. Of course, in other embodiments, the drive mechanism 3 can also be a pneumatic cylinder or other commonly used linear drive mechanism 3, as long as it can drive the positioning tip to perform telescopic movement.

[0043] One embodiment of the present invention also provides a rock drilling rig, including the aforementioned positioning center.

[0044] The rock drilling rig of the present invention, by employing the aforementioned positioning tip, has a second connecting part 12 provided on the outer peripheral sidewall of the front end of the base body 1. The cross-section of the second connecting part 12 gradually narrows from back to front along the axial direction of the base body 1 to form a conical inclined surface extending forward and inclined toward the axial centerline of the base body 1. This inclined second connecting part 12 can provide a stable installation foundation for the first support member 2, and also provides a foundation for expanding the target contact support area. Multiple first support members 2 are sequentially arranged circumferentially on the second connecting part 12. Each first support member 2 is inclined forward in a direction away from the axial centerline of the base body 1. The second parts 22 of the multiple first support members 2 together constitute a support body. The projected area of ​​the support body in the axial direction of the base body 1 is larger than the axial projected area of ​​the base body 1 itself. That is, the target contact support area D formed by the second parts 22 of the multiple first support members 2 is larger than the cross-sectional area of ​​the base body 1. This can increase the contact area between the positioning tip and the target, thereby improving the contact stability between the positioning tip and the target, thus improving the support and positioning stability, and ultimately improving the straightness of the drilling.

[0045] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of those different embodiments or examples.

[0046] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0047] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in this application, and these should all be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. Positioned at the top, its characteristic is that, include: A base body, the base body having a first connecting portion and a second connecting portion, the first connecting portion being used to connect to the output end of a drive mechanism, the second connecting portion being located on the outer peripheral sidewall of the front end of the base body, and the second connecting portion being arranged around the axial centerline of the base body; and Multiple first support members are provided, each of which has a first part and a second part at its axial ends. Each first part is connected to a second connecting part. The multiple first support members are arranged sequentially along the circumference of the second connecting part. Each first support member is obliquely forward in a direction away from the axial center line of the seat body. Each second part is used to abut against the target object. The second parts of the multiple first support members together constitute a support body. The projected area of ​​the support body on the axial direction of the seat body is larger than the axial projected area of ​​the seat body itself.

2. The positioning tip according to claim 1, characterized in that, Each of the second parts is provided with a plurality of support teeth, which are arranged sequentially around the axial center line of the corresponding first support member, and the support teeth are used to abut against the target.

3. The positioning tip according to claim 2, characterized in that, In the same first support member, the projected area of ​​the plurality of support teeth in the axial direction of the first support member is greater than the projected area of ​​the first portion in the axial direction of the first support member.

4. The positioning tip according to claim 2, characterized in that, The cross-section of each of the support teeth gradually decreases from the direction away from the first part.

5. The positioning tip according to claim 4, characterized in that, Each of the aforementioned support teeth is provided with a first support portion and a second support portion. The first support portion is connected to the first part at one end along the axial direction of the first support member, and the second support portion is provided at the other end of the first support portion along the axial direction of the first support member. The cross-sections of the second support portion and the first support portion gradually decrease from the direction away from the first part, and the maximum cross-section of the second support portion is equal to or greater than the maximum cross-section of the first support portion.

6. The positioning tip according to claim 1, characterized in that, The second connecting portion has a plurality of first connecting holes, which are arranged sequentially along the circumference of the second connecting portion; Each of the first portions is inserted into the corresponding first connecting hole, and each of the first portions is welded together with the second connecting portion; or, each of the first portions is inserted into the corresponding first connecting hole, and each of the first portions is threadedly connected to the corresponding first connecting hole.

7. The positioning tip according to any one of claims 1-6, characterized in that, The cross-section of the second connecting portion gradually decreases from back to front along the axial direction of the seat body; And / or, the front end face of the seat is located at one axial end of the seat, the front end face of the seat is close to the second connecting part, and the front end face of the seat has a groove, the groove being arranged around the axial centerline of the seat; And / or, the positioning tip further includes: The second support member also has a first part and a second part at both axial ends. The first part of the second support member is connected to the front end face of the seat body. The front end face of the seat body is located at one axial end of the seat body and is close to the second connecting part. The second part of the second support member is used to abut against the target object.

8. Top-tier institutions, characterized by: include: A drive mechanism for connecting to a carrier; as well as The positioning tip according to any one of claims 1-7, wherein the first connecting portion is connected to the output end of the driving mechanism, so that the positioning tip can extend and retract with the output end of the driving mechanism.

9. The top mechanism according to claim 8, characterized in that, The first connecting part has a second connecting hole and a third connecting hole. The second connecting hole extends along the axial direction of the base body and cooperates with the output end of the drive mechanism. The third connecting hole extends along the radial direction of the base body, communicates with the second connecting hole, and penetrates through both sides of the first connecting part along the radial direction of the base body. The top institutions also include: The fastener has a head that abuts against the first connecting portion along the radial side of the seat, and the rod portion of the fastener passes through the third connecting hole and the output end of the drive mechanism. A locking member is screwed to the rod portion of the fastener, and the locking member abuts against the first connecting portion on the other side of the seat along the radial direction.

10. A rock drilling rig, characterized in that, Includes the positioning tip as described in any one of claims 1-7.

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