A quick rod changing device for rock drill

Abstract

The invention discloses a rapid rod changing device for a rock drill, comprising: a drill rod clamping mechanism, having at least one clamping opening capable of clamping or loosening the drill rod, for fixing or releasing the drill rod; a clamping power mechanism, connected in transmission with the drill rod clamping mechanism, driving the drill rod clamping mechanism to clamp or release the drill rod; a rod protection mechanism, having an annular groove capable of accommodating the end of the drill rod, with a notch provided on the annular groove; a connecting shaft, connected with the drill rod clamping mechanism and the rod protection mechanism, and having a fixed fit with the drill rod clamping mechanism and a rotational fit with the rod protection mechanism; a rod changing power mechanism, connected in transmission with the connecting shaft, to drive the connecting shaft to rotate, and drive the front end and / or the rear end of the drill rod on the drill rod clamping mechanism to move to the position corresponding to the notch in the annular groove. The invention is applied to the technical field of rock drills, and not only has the function of clamping and rod changing synchronously, but also ensures the synchronization of the front end and the rear end of the drill rod during the rod changing process, thereby realizing rapid rod changing, and having higher stability of rapid rod changing.

Description

Technical Field

[0001] The invention relates to the technical field of rock drills, in particular to a quick rod changing device for rock drills. Background Art

[0002] At present, the drilling depth of the drill rods of drilling equipment on the market is mostly fixed in length. When the length of the drill rod differs greatly from the drilling depth, the required drilling depth can only be achieved by replacing the propulsion beam assembly or more components, and the drilling depth of multiple lengths cannot be flexibly switched. It is necessary to add and clamp multiple drill rods to adjust the drill rod length and drilling depth.

[0003] Referring to the method and device for manipulating rod-shaped workpieces in drilling and anchor support disclosed in patent publication number CN101903614A, it can be known that the feeding member is provided with a screw surface, and the feeding member is rotated around its rotation axis when changing rods. Therefore, under the influence of the screw surface, the drill rod moves to the feeding position in the drill rod bin according to the rotation direction, and then the rod changing operation is completed. The coaxial connecting rod performance of this structural design is poor, and the synchronization between the front end and the rear end of the drill rod is not easy to control or the control requirements are high. It is difficult to achieve the alignment between the current drill rod and the previous drill rod and the push beam, resulting in the problem of instability in rapid rod changing. In addition to this screw push rod changing structure, most other equipment even adopts manual docking and rod changing, which not only has high labor intensity and unsafe operation, but also borrows a lot of auxiliary facilities, resulting in equipment redundancy and increased costs. Summary of the invention

[0004] In view of the problem of instability in rapid rod changing in the above-mentioned prior art, the present invention provides a rapid rod changing device for a rock drill, which has higher stability in rapid rod changing and a matching clamping function, thereby realizing rapid rod changing, which is relatively more stable and reliable.

[0005] To achieve the above object, the present invention provides a rock drill quick rod changing device, comprising:

[0006] A drill rod clamping mechanism having at least one clamping opening capable of clamping or loosening the drill rod;

[0007] A clamping power mechanism, which is connected to the drill rod clamping mechanism to drive the drill rod clamping mechanism to clamp or release the drill rod;

[0008] The rod protection mechanism has an annular groove capable of receiving the front end and / or the rear end of the drill rod, and the annular groove is provided with a notch communicating with the annular groove;

[0009] A connecting shaft connected to the drill rod clamping mechanism and the rod protection mechanism, wherein the connecting shaft and the drill rod clamping mechanism are in a fixed fit, and the connecting shaft and the rod protection mechanism are in a rotational fit;

[0010] The rod changing power mechanism is connected to the connecting shaft in driving connection so as to drive the connecting shaft to rotate and drive the front end and / or the rear end of the drill rod on the drill rod clamping mechanism to move to the position corresponding to the notch in the annular groove.

[0011] In one embodiment, the drill rod clamping mechanism includes a clamp support and a clamp rotatably connected to the clamp support;

[0012] The clamp support is fixedly connected to the connecting shaft, and the clamp is transmission-connected to the clamping power mechanism;

[0013] The clamp support is provided with a first arc-shaped opening, the clamp is provided with a second arc-shaped opening corresponding to the position of the first arc-shaped opening, and the clamp opening is surrounded by the first arc-shaped opening and the corresponding second arc-shaped opening.

[0014] In one embodiment, the number of the first arc-shaped openings and the number of the second arc-shaped openings are both two.

[0015] In one embodiment, the clamping power mechanism is a clamping cylinder;

[0016] The fixed end of the clamping oil cylinder is connected to the clamp support, and the telescopic end of the clamping oil cylinder is hinged to the clamp.

[0017] In one embodiment, the clamp support and the clamp are both sleeved on the connecting shaft, and the clamp and the connecting shaft are rotationally matched.

[0018] In one embodiment, the guard bar mechanism comprises:

[0019] A front rod guard having an annular groove and a notch for receiving the front end of the drill rod;

[0020] A tail rod protector, having the annular groove and the notch, for receiving the tail end of the drill rod;

[0021] The notch on the front guard bar and the notch on the rear guard bar are located on the same straight line.

[0022] In one embodiment, the number of the drill rod clamping mechanisms is two:

[0023] One of the drill rod clamping mechanisms is located between the front rod guard and the rear rod guard and close to the front rod guard;

[0024] The other drill rod clamping mechanism is located between the front rod protector and the rear rod protector and close to the rear rod protector.

[0025] In one embodiment, the rod-changing power mechanism is a rod-changing oil cylinder;

[0026] The first end of the rod-changing oil cylinder is connected to the rod-protecting mechanism, and the second end of the rod-changing oil cylinder is drivingly connected to the connecting shaft.

[0027] In one embodiment, the rock drill quick rod changing device further comprises a rod changing arm, one end of which is fixedly matched with the connecting shaft, and the other end of which is hinged with the second end of the rod changing cylinder.

[0028] In one embodiment, the front bar guard and the rear bar guard both include: a base frame, a side baffle plate and an arc-shaped plate;

[0029] The arc-shaped plate is fixedly connected to the base frame, and the notch is provided on the arc-shaped plate;

[0030] The side baffle on the front rod guard covers the annular groove and is away from the side of the rear rod guard to prevent the front end of the drill rod from being subjected to additional impact force;

[0031] The side baffle on the rear rod protector covers the annular groove and is away from one side of the front rod protector to prevent the rear end of the drill rod from being subjected to additional impact force.

[0032] Compared with the prior art, the present invention has the following beneficial technical effects:

[0033] 1. The present invention provides a drill rod clamping mechanism, a rod protection mechanism and a connecting shaft, so that the rapid rod changing device has the function of clamping and changing rods synchronously;

[0034] 2. The present invention uses the same connecting shaft to connect two sets of drill rod clamping mechanisms, and drives the clamp to rotate through the clamping cylinder of the clamp support, so that the two sets of drill rod clamping mechanisms have good synchronization;

[0035] 3. Compared with the spiral push drill rod structure in the prior art, the present invention is more stable and reliable because two sets of drill rod clamping mechanisms are provided to ensure the synchronization between the front end and the rear end of the drill rod;

[0036] 4. In the process of clamping and changing the rod, the rod protection mechanism can protect the drill rod in real time, so that the rod can be changed quickly and safely;

[0037] 5. Compared with manual docking and rod replacement, the present invention is not only safer to operate, but also saves labor costs and redundant equipment costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0039] Figure 1 It is a front isometric view of the quick rod changing device in an embodiment of the present invention;

[0040] Figure 2 for Figure 1 A local enlarged schematic diagram in FIG.

[0041] Figure 3 This is a back-view isometric view of the quick rod changing device in an embodiment of the present invention;

[0042] Figure 4 for Figure 3 A local enlarged schematic diagram in FIG.

[0043] Figure 5 A side view of a quick rod changing device according to an embodiment of the present invention

[0044] Figure 6 An axonometric view of a front bar guard or a rear bar guard in an embodiment of the present invention;

[0045] Figure 7 A front view of a front bar guard or a rear bar guard in an embodiment of the present invention;

[0046] Figure 8 It is a front view of the drill rod clamping mechanism in the embodiment of the present invention;

[0047] Fig. 9 A schematic diagram of the structure of a clamp support in an embodiment of the present invention;

[0048] Fig.10 is a schematic structural diagram of a clamp in an embodiment of the present invention;

[0049] Fig.11 is an axonometric view of a lever-changing arm in an embodiment of the present invention;

[0050] Fig.12 Schematic diagram of rod replacement for annular groove drill rod in an embodiment of the present invention.

[0051] Figure numbers: annular groove 101, notch 102, front rod guard 103, tail rod guard 104, base frame 105, side baffle 106, arc plate 107, clamp 201, clamp support 202, clamp 203, clamping cylinder 3, connecting shaft 4, rod changing cylinder 5, rod changing arm 6, sleeve 601, keyway 602, connecting column 603, drill rod 7, rod guard support 8, first hinge 801, rod mounting cylinder 9, second hinge 901, third hinge 902, propulsion beam 10.

[0052] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0053] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0054] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0055] In addition, in the present invention, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0056] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, a physical connection, or a wireless communication connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0057] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0058] like Figure 1-5 The figure shows a rock drill quick rod changing device disclosed in this embodiment, which mainly includes a rod protection mechanism, a drill rod clamping mechanism, a connecting shaft 4, a clamping power mechanism and a rod changing power mechanism.

[0059] refer to Figure 1-7 The rod protection mechanism is mainly used to store and protect the drill rod 7 to be replaced before and after the rod replacement operation. Specifically, the rod protection mechanism has an annular groove 101 that can store the front end and / or the rear end of the drill rod 7, and the annular groove 101 is provided with a notch 102 connected to the annular groove 101, and the width of the notch 102 is greater than the diameter of the drill rod and less than 2 times the diameter of the drill rod. The annular groove 101 can make the drill rod 7 move along the annular groove 101 to a fixed position, and the drill rod 7 can enter and exit the annular groove 101 through the notch 102, and only one drill rod can enter and exit the annular groove 101 at a time, that is, when the end of one drill rod 7 rotates to the notch 102 position during the rod replacement, the end of the other drill rod 7 is in a closed position in the annular groove 101, so the annular groove 101 can limit the other drill rod 7 to prevent it from falling, and the annular groove 101 with the notch 102 can ensure that a drill rod 7 is accurately sent out during the rod loading process.

[0060] More specifically, the rod protection mechanism includes a front rod protection device 103 and a rear rod protection device 104. The front rod protection device 103 and the rear rod protection device 104 have the same structure and are arranged opposite to each other. Both are provided with an annular groove 101 and a notch 102, and the notch 102 on the front rod protection device 103 and the notch 102 on the rear rod protection device 104 are located on the same straight line. The front rod protection device 103 is used to receive the front end of the drill rod 7, and the rear rod protection device 104 is used to receive the rear end of the drill rod 7. When receiving, the front end and the rear end of the drill rod 7 are both located in the middle position of the axial direction of the annular groove 101, that is, the front end or the rear end of the drill rod 7 extends from one end of the annular groove 101 into the annular groove 101 but does not pass through the annular groove 101, so as to prevent the front end and the rear end of the drill rod 7 from being subjected to additional impact force through the front rod protection device 103 and the rear rod protection device 104, thereby protecting the drill rod 7 from damage.

[0061] The front bar guard 103 and the rear bar guard 104 have sufficient strength and support surfaces to protect the drill rod 7. In the specific implementation process, the front bar guard 103 and the rear bar guard 104 both include: a base frame 105, a side baffle 106 and an arc-shaped arc plate 107. The arc plate 107 is fixedly connected to the base frame 105 by welding, and the annular groove 101 is located between the base frame 105 and the arc plate 107, and the notch 102 is opened in the middle of the arc plate 107. The side baffle 106 is welded and fixed to the base frame 105 and the arc plate 107, and the side baffle 106 covers one side of the annular groove 101, and a notch is provided on the side baffle 106 at the position corresponding to the notch 102. In this embodiment, the side baffle 106 on the front rod guard 103 covers the annular groove 101 and is away from one side of the tail rod guard 104, so as to prevent the front end of the drill rod 7 from being subjected to additional impact force and to prevent the drill rod 7 from sliding out of the side of the annular groove 101 when it is stored in the front rod guard 103; the side baffle 106 on the tail rod guard 104 covers the annular groove 101 and is away from one side of the front rod guard 103, so as to prevent the rear end of the drill rod 7 from being subjected to additional impact force and to prevent the drill rod 7 from sliding out of the side of the annular groove 101 when it is stored in the tail rod guard 104.

[0062] refer to Figure 1-5 and Figure 8-10 The drill rod clamping mechanism has at least one clamping opening 201 that can clamp or loosen the drill rod 7, which is mainly used to clamp and fix the drill rod 7 during the drill rod changing process, and at the same time ensure the synchronization between the front end and the rear end of the drill rod 7 during the drill rod changing process, thereby ensuring the coaxial connecting rod performance of the entire quick rod changing device.

[0063] In this embodiment, the drill rod clamping mechanism includes a clamp support 202 and a clamp 203 rotatably connected to the clamp support 202, and the clamping power mechanism is connected to the clamp 203 in a transmission manner to drive the clamp 203 to rotate on the clamp support 202. The clamp support 202 has at least one first arc-shaped opening, and the clamp 203 is provided with a second arc-shaped opening corresponding to the position of the first arc-shaped opening, and the clamping opening 201 is surrounded by the first arc-shaped opening and the corresponding second arc-shaped opening. Under the drive of the clamping power mechanism, the clamp 203 rotates on the clamp support 202 to achieve the mutual approach or mutual distance between the first arc-shaped opening and the corresponding second arc-shaped opening, that is, the switching of the opening and closing of the clamp 201 is achieved, so as to achieve the two states of loosening or clamping the drill rod 7.

[0064] Specifically in this embodiment, the number of the first arc-shaped openings and the number of the second arc-shaped openings are both two, that is, one set of drill rod clamping mechanism can clamp two drill rods 7 at the same time.

[0065] In this embodiment, the clamping power mechanism is a clamping cylinder 3, the fixed end of the clamping cylinder 3 is connected to the clamp support 202 through a hinge or a pin mechanism, and the telescopic end of the clamping cylinder 3 is hinged to the clamp 203. When the clamping cylinder 3 telescopes, the clamp 203 can rotate relative to the clamp support 202, thereby realizing the switching of the opening and closing forms of the clamp 201. Preferably, there are two drill rod clamping mechanisms, one of which is located between the front rod guard 103 and the rear rod guard 104 and close to the front rod guard 103, and is used to clamp the front end of the drill rod 7; the other drill rod clamping mechanism is located between the front rod guard 103 and the rear rod guard 104 and close to the rear rod guard 104, and is used to clamp the rear end of the drill rod 7, so as to ensure the synchronization between the front end and the rear end of the drill rod 7 during the rod changing process, which is more stable and reliable.

[0066] refer to Figure 1-5 and Fig.11 The connecting shaft 4 and the rod-changing power mechanism are mainly used to transfer the drill rod 7 in the annular groove 101 to the notch 102 to prepare for the rod installation operation. Specifically, one end of the connecting shaft 4 is rotatably matched with the rear rod protector 104, and the other end passes through the clamp support 202 and the clamp 203 of the two sets of drill rod clamping mechanisms and then rotatably matches with the front rod protector 103, and the connecting shaft 4 passes through the front rod protector 103 and / or the connecting shaft 4 passes through the rear rod protector 104. The connecting shaft 4 and the clamp support 202 are fixedly matched, the connecting shaft 4 and the clamp 203 are rotationally matched, the rod-changing power mechanism is arranged on the side of the front guard bar 103 away from the rear guard bar 104 (i.e., arranged on the side baffle 106 of the front guard bar 103), and / or the rod-changing power mechanism is arranged on the side of the rear guard bar 104 away from the front guard bar 103 (i.e., arranged on the side baffle 106 of the rear guard bar 104), and the rod-changing power mechanism is connected to the connecting shaft 4 in a transmission manner to drive the connecting shaft 4 to rotate. The rotational match is achieved by means of bearings or clearance fit, and the fixed fit can be achieved by means of welding, flat key plus keyway.

[0067] More specifically, the rod-changing power mechanism is a rod-changing oil cylinder 5 , a first end of the rod-changing oil cylinder 5 is hinged to the rod-protecting mechanism, and a second end of the rod-changing oil cylinder 5 is transmission-connected to the transmission shaft.

[0068] In the specific implementation process, the number of the rod-changing cylinders 5 can be set to one or two:

[0069] When the number of the rod-changing oil cylinder 5 is one, the fixed end of the rod-changing oil cylinder 5 is hinged on the side baffle 106 of the front rod guard 103 or the rear rod guard 104, and the telescopic end of the rod-changing oil cylinder 5 is transmission-connected with the connecting shaft 4, and the telescopic movement of the rod-changing oil cylinder 5 drives the rotation of the connecting shaft 4;

[0070] When there are two rod-changing cylinders 5, the fixed end of one of the rod-changing cylinders 5 is hinged on the side baffle 106 of the front rod guard 103, and the telescopic end is transmission-connected to one end of the connecting shaft 4; the fixed end of the other rod-changing cylinder 5 is hinged on the side baffle 106 of the rear rod guard 104, and the telescopic end is transmission-connected to the other end of the connecting shaft 4. The synchronous telescopic and retractive operation of the two rod-changing cylinders 5 drives the rotation of the connecting shaft 4.

[0071] In the two embodiments of the above-mentioned rod-changing oil cylinder 5, the telescopic end of the rod-changing oil cylinder 5 is connected to the connecting shaft 4 through the rod-changing arm 6. Specifically, the connecting shaft 4 is provided with a flat key, one end of the rod-changing arm 6 is provided with a sleeve 601 configured with the connecting shaft 4, and the sleeve 601 is provided with a keyway 602 configured with the flat key. The rod-changing arm 6 is fixedly connected to the connecting shaft 4 through the flat key and the keyway 602. The other end of the rod-changing arm 6 is provided with a connecting column 603, and the connecting column 603 is hinged to the telescopic end of the hinged rod-changing oil cylinder 5. Therefore, when the rod-changing oil cylinder 5 drives the rod-changing arm 6 to swing around the connecting shaft 4, the rod-changing arm 6 can drive the connecting shaft 4 to rotate. Of course, welding or other fastening devices can also be used to connect the rod-changing arm 6 and the connecting shaft 4 in the specific implementation process. It should be noted that in the specific application process, the flat key plus keyway connection between the rod-changing arm 6 and the connecting shaft 4 can also be replaced by other fixing methods such as welding or latches.

[0072] When the rod-changing oil cylinder 5 drives the connecting shaft 4 to rotate, the connecting shaft 4 is in rotational cooperation with the front rod guard 103 and the rear rod guard 104, so the front rod guard 103, the rear rod guard 104, the annular groove 101, and the notch 102 are all immobile. Since the connecting shaft 4 is fixedly connected to the clamp support 202, the connecting shaft 4 drives the clamp support 202 to rotate. When the clamp support 202 rotates and the clamping oil cylinder 3 does not move, the rod-changing oil cylinder 5 pushes the clamp 203 and the clamp support 202 to rotate together, that is, the connecting shaft 4 drives the two groups of clamp supports 202 to rotate synchronously, and the drill rod 7 is clamped by the clamp 203 and the clamp support 202. Therefore, the clamp 203 and the clamp support 202 drive the drill rod 7 to rotate together, that is, a drill rod 7 in the annular groove 101 can be moved to the notch 102 position, so as to complete the subsequent rod-changing operation.

[0073] In specific applications, the bottom ends of the front rod guard 103 and the rear rod guard 104 are both rotatably connected to the rod guard support 8 of the rock drill through the first hinge 801, and rod mounting cylinders 9 are provided at positions corresponding to the front rod guard 103 and the rear rod guard 104 on the rod guard support 8, the fixed end of the rod mounting cylinder 9 is rotatably connected to the rod guard support 8 through the second hinge 901, and the telescopic end of the rod mounting cylinder 9 is rotatably connected to the front rod guard 103 and the rear rod guard 104 through the third hinge 902, and the front rod guard 103 and the rear rod guard 104 are driven to rotate on the rod guard support 8 by driving the two rod mounting cylinders 9 to extend and retract. On this basis, the working process of the quick rod changing device in this embodiment is specifically as follows:

[0074] When the drill rod on the rock drill is drilling, there is no need to install the rod at this time, so the top ends of the front rod guard 103 and the rear rod guard 104 are offset in the direction away from the propulsion beam 10 on the rock drill. At this time, two drill rods 7 are accommodated in the annular groove 101. The two drill rods 7 are located outside the notch 102 in the annular groove 101 and are clamped and fixed by the two sets of clamps 203 and the clamp support 202.

[0075] When the last drill rod on the rock drill is completed and needs to be replaced, the front rod guard 103 and the rear rod guard 104 are driven to rotate by the rod loading cylinder 9, so that the notches 102 of the front rod guard 103 and the rear rod guard 104 fall on the rod replacement station of the propulsion beam 10. In this process, the connecting shaft 4, the drill rod 7, the clamp 203, the clamp support 202 and the front rod guard 103 and the rear rod guard 104 move synchronously, and the drill rod 7 in the annular groove 101 does not move relative to the annular groove 101;

[0076] After the notches 102 of the front rod guard 103 and the rear rod guard 104 fall on the rod changing position of the propulsion beam 10, the rod loading cylinder 9 stops moving, and then the rod changing cylinder 5 is started, so that the two drill rods 7 in the annular groove 101 move along the annular groove 101 until one drill rod 7 is located at the notch 102 and then the rod changing cylinder 5 is stopped. At this time, the other drill rod 7 is still received by the annular groove 101. Fig.12 As shown; in this process, the front guard rod 103 and the rear guard rod 104 do not move, and the connecting shaft 4, the drill rod 7, the clamp 203, and the clamp support 202 move synchronously;

[0077] Then, the drill rod 7 in the notch 102 is connected and fixed to the drill bit of the last drill rod that has been drilled, and the clamping cylinder 3 is started to make the clamp 203 and the clamp support 202 release the drill rod 7 in the notch 102 and then stop the clamping cylinder 3;

[0078] Then, the rod loading cylinder 9 is started again to drive the front rod guard 103 and the rear rod guard 104 to reset, and then the rod loading cylinder 9 is stopped. Finally, the clamping cylinder 3 is started again, so that the clamp 203 and the clamp support 202 clamp another drill rod 7, and then the clamping cylinder 3 is stopped.

[0079] At this point, one rod change operation is completed and the next rod change is waiting.

[0080] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A rock drill quick rod changing device, characterized in that: include: A drill rod clamping mechanism having at least one clamping opening capable of clamping or loosening the drill rod; A clamping power mechanism, which is connected to the drill rod clamping mechanism to drive the drill rod clamping mechanism to clamp or release the drill rod; The rod protection mechanism has an annular groove capable of receiving the front end and / or the rear end of the drill rod, and the annular groove is provided with a notch communicating with the annular groove; A connecting shaft connected to the drill rod clamping mechanism and the rod protection mechanism, wherein the connecting shaft and the drill rod clamping mechanism are in a fixed fit, and the connecting shaft and the rod protection mechanism are in a rotational fit; A rod-changing power mechanism is connected to the connecting shaft to drive the connecting shaft to rotate and drive the front end and / or the rear end of the drill rod on the drill rod clamping mechanism to move to a position in the annular groove corresponding to the notch; The drill rod clamping mechanism comprises a clamp support and a clamp rotatably connected to the clamp support; The clamp support is fixedly connected to the connecting shaft, and the clamp is transmission-connected to the clamping power mechanism; The clamp support is provided with a first arc-shaped opening, the clamp is provided with a second arc-shaped opening corresponding to the position of the first arc-shaped opening, and the clamp opening is surrounded by the first arc-shaped opening and the corresponding second arc-shaped opening.

2. The rock drill quick rod changing device according to claim 1, characterized in that: The number of the first arc-shaped openings and the number of the second arc-shaped openings are both two.

3. The rock drill quick rod changing device according to claim 1, characterized in that: The clamping power mechanism is a clamping oil cylinder; One end of the clamping oil cylinder is connected to the clamp support, and the other end of the clamping oil cylinder is hinged to the clamp.

4. The rock drill quick rod changing device according to claim 1, characterized in that: The clamp support and the clamp are both sleeved on the connecting shaft, and the clamp is rotationally matched with the connecting shaft.

5. The rock drill quick rod changing device according to any one of claims 1 to 4, characterized in that: The guard bar mechanism comprises: A front rod guard having an annular groove and a notch for receiving the front end of the drill rod; A tail rod protector, having the annular groove and the notch, for receiving the tail end of the drill rod; The notch on the front guard bar and the notch on the rear guard bar are located on the same straight line.

6. The rock drill quick rod changing device according to claim 5, characterized in that: The number of the drill rod clamping mechanisms is two: One of the drill rod clamping mechanisms is located between the front rod guard and the rear rod guard and close to the front rod guard; The other drill rod clamping mechanism is located between the front rod protector and the rear rod protector and close to the rear rod protector.

7. The rock drill quick rod changing device according to claim 5, characterized in that: The rod-changing power mechanism is a rod-changing oil cylinder; The first end of the rod-changing oil cylinder is connected to the rod-protecting mechanism, and the second end of the rod-changing oil cylinder is drivingly connected to the connecting shaft.

8. The rock drill quick rod changing device according to claim 7, characterized in that: It also includes a rod-changing arm, one end of which is fixedly matched with the connecting shaft, and the other end of which is hinged with the second end of the rod-changing cylinder.

9. The rock drill quick rod changing device according to claim 5, characterized in that: The front bar guard and the rear bar guard both include: a base frame, a side baffle plate and an arc-shaped plate; The arc-shaped plate is fixedly connected to the base frame, and the notch is provided on the arc-shaped plate; The side baffle on the front rod guard covers the annular groove and is away from the side of the rear rod guard to prevent the front end of the drill rod from being subjected to additional impact force; The side baffle on the rear rod protector covers the annular groove and is away from one side of the front rod protector to prevent the rear end of the drill rod from being subjected to additional impact force.

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