Reverse beating device and rock drill

Abstract

The invention provides a reverse hitting device used for a rock drill, the rock drill comprises a machine body, a bit shank protruding from the machine body and a drill rod fixed to the bit shank, the drill rod comprises a drill bit and a connecting sleeve, the connecting sleeve is arranged on the bit shank in a sleeving mode, the diameter of the connecting sleeve is larger than that of the drill bit, and the diameter of the connecting sleeve is larger than that of the drill bit. The reverse beating device comprises a fixing part fixed to the machine body, a reverse beating oil cylinder fixedly connected with the fixing part and an abutting assembly connected with the reverse beating oil cylinder. According to the reverse beating device and the rock drill, the reverse beating device can be used in cooperation with a common rock drill, and normal work of the rock drill cannot be affected; the reverse beating device is simple in structure and convenient to use, the rock drill using the reverse beating device can achieve the reverse beating function when a drill is stuck, quick-wear parts are easy to replace, and the user experience feeling is good.

Description

Technical Field

[0001] This invention relates to the field of engineering machinery technology, specifically to a reverse-strike device and a rock drill. Background Technology

[0002] Due to its strong adaptability to complex geological conditions, relatively low construction costs, and mature technology, the drill-and-blast method still occupies an irreplaceable dominant position in tunnel engineering, mining, water conservancy projects, and national defense construction. The rock drilling rig, as the core equipment for implementing the drill-and-blast method, directly determines drilling efficiency and quality. The hydraulic rock drill is the key actuator of the rock drilling rig; it uses high-pressure oil to drive a piston to impact the drill rod at high frequency, combined with a rotating propulsion action, to complete rock breaking and drilling.

[0003] In actual drilling operations, rock drills often experience stuck drill accidents due to two core issues: First, the heterogeneity of the rock strata, such as when traversing fractured zones, weak interlayers, or water-swellable rock masses, can cause the borehole wall to collapse, shrink, or undergo plastic deformation, leading to the drill rod seizing. Second, wear, bending, or misalignment of the drill bit assembly (drill rod, connecting sleeve) can cause deviations in the drilling trajectory, resulting in abnormal friction and clamping between the drill rod and the borehole wall. Stuck drill accidents not only interrupt drilling operations and significantly reduce construction efficiency, but can also leave the drill bit assembly inside the hole or even damage the rock drill, resulting in huge economic and time losses.

[0004] To address this common malfunction, one existing technical solution is to integrate a reverse-impact (drill rod removal) mechanism inside the hydraulic rock drill. This mechanism typically uses an additional hydraulic circuit inside or behind the impact piston to drive the piston in a reverse impact motion, aiming to loosen the stuck drill rod and thus remove it. However, this built-in reverse-impact design has several inherent drawbacks that limit its widespread application: Specialized drill shanks are expensive: to achieve reverse drilling power transmission, specially designed hollow or specially structured drill shanks must be used. As a core consumable part of the rock drill, these drill shanks wear out quickly, significantly increasing the long-term operating costs for users.

[0005] The overall size and supporting structure have deteriorated: the introduction of the reverse drilling mechanism has significantly increased the axial length of the rock drill. To accommodate the longer drill head, the size of the drill arm feed beam must be increased accordingly. This not only increases manufacturing costs but also reduces the overall flexibility of the machine and makes it less adaptable to narrow tunnels or low-ceilinged construction environments.

[0006] Maintenance is significantly reduced: When replacing routine wear parts (such as the drill bit and water seal) or repairing faults, it is often necessary to first disassemble the complex reverse mechanism as a whole. The operation process is cumbersome, time-consuming and labor-intensive, which greatly increases the labor intensity and downtime of equipment maintenance.

[0007] Imbalance between structure and cost control: The reverse-strike mechanism greatly increases the complexity of the internal structure of the rock drill, requiring extremely high processing accuracy and reliability, which leads to a significant increase in the overall production cost.

[0008] Low market penetration: Although stuck drill handling is a common need in rock drilling operations, the sharp increase in manufacturing and operating costs makes it difficult for high-end rock drills with built-in reverse drilling functions to be popularized in cost-sensitive small and medium-sized projects and the broader market.

[0009] In view of this, it is necessary to improve the existing counter-attack devices to solve the above problems. Summary of the Invention

[0010] The purpose of this invention is to provide a reverse drilling device to solve the problems caused by the built-in reverse drilling device of existing rock drills, such as the need for a dedicated drill bit and excessive overall size.

[0011] To achieve the above objectives, the present invention provides a reverse-strike device for a rock drill. The rock drill includes a body, a shank protruding from the body, and a drill rod fixed to the shank. The drill rod includes a drill bit and a connecting sleeve. The connecting sleeve is fitted onto the shank, and the diameter of the connecting sleeve is larger than the diameter of the drill bit. The reverse-strike device includes a fixing part fixed to the body, a reverse-strike cylinder fixedly connected to the fixing part, and a holding assembly connected to the reverse-strike cylinder. The holding assembly has a first state of abutting against the connecting sleeve axially and a second state of disengaging from the connecting sleeve. When the holding assembly is in the first state, the holding assembly abuts against the connecting sleeve axially from one side of the drill bit. The shank drives the drill rod to reciprocate axially, and the reverse-strike cylinder drives the holding assembly to provide a reverse-strike force to the drill rod.

[0012] As a further improvement of the present invention, the machine body includes a machine head and a gearbox that are fixedly connected along the axial direction, and the fixing part is fixed between the machine head and the gearbox.

[0013] As a further improvement of the present invention, the gearbox includes a gearbox cover near the drill rod, and the head, the fixing part and the gearbox cover are fixedly connected by double-ended bolts.

[0014] As a further improvement of the present invention, the fixing part protrudes radially from the machine body, and the number of the reverse-action cylinders is two, with the two reverse-action cylinders symmetrically arranged on both sides of the machine body.

[0015] As a further improvement of the present invention, the abutment assembly includes an abutment plate, a connecting plate fixedly connected to the machine body, and a driving member. The abutment plate and the connecting plate are rotatably connected by a rotating shaft. The driving member is used to drive the abutment plate to rotate relative to the connecting plate. A groove is provided on one side of the abutment plate to allow the drill bit to move. When the abutment assembly is in the first state, the abutment plate abuts against the connecting sleeve along the axial direction. The groove is used to allow the drill bit to move. The reverse hydraulic cylinder is connected to the abutment plate along the axial direction. When the abutment assembly is in the second state, the abutment plate rotates to disengage from the connecting sleeve.

[0016] As a further improvement of the present invention, the connecting plate protrudes from one end of the fixing part toward one side of the drill rod.

[0017] As a further improvement of the present invention, the driving component is a reverse-action cylinder and a rotating connector pivotally connected to the reverse-action cylinder. The end of the rotating connector away from the reverse-action cylinder is pivotally connected to the connecting support plate. When the support assembly is in the first state, the extension direction of the rotating connector is parallel to the axis of the drill rod. When the support assembly is in the second state, the extension direction of the rotating connector is inclined relative to the axis of the drill rod. The reverse-action cylinder drives the rotating connector to rotate to switch the support assembly between the first state and the second state.

[0018] As a further improvement of the present invention, the abutting assembly includes a drive plate connected to the anti-impact cylinder, a rotating plate rotatably fixed on the drive plate at one end, and a rotating cylinder connected to the other end of the rotating plate. When the abutting assembly is in the first state, the rotating cylinder drives the rotating plate to rotate to abut against the connecting sleeve along the axial direction.

[0019] As a further improvement of the present invention, there are two rotating plates, which are respectively located on both sides of the drill rod. The rotating cylinder is a double-headed cylinder, and the two ends of the rotating cylinder are respectively connected to the two rotating plates.

[0020] As a further improvement of the present invention, a limiting shaft is provided protruding from the middle of the rotating plate toward the driving plate, and a limiting groove is recessed on the side of the driving plate toward the rotating plate. The limiting shaft protrudes into the limiting groove, and the limiting groove is used to limit the rotation direction and distance of the rotating plate.

[0021] As a further improvement of the present invention, the drive plate has a first position near the connecting sleeve and a second position near the machine body. The counter-actuating cylinder is used to control the drive plate to move between the first position and the second position. When the abutting component is in the first state, the drive plate is located in the first position. When the abutting component is in the second state, the drive plate is located in the second position.

[0022] As a further improvement of the present invention, the drive plate is located on the side of the rotating plate away from the machine body, and a clearance hole is provided in the middle of the drive plate for the connecting sleeve to pass through, the diameter of the clearance hole being larger than the diameter of the connecting sleeve.

[0023] The present invention also provides a rock drill, the rock drill including the reverse drilling device as described above.

[0024] The beneficial effects of the present invention are: the reverse-strike device and the rock drill of the present invention, wherein the reverse-strike device can be used in conjunction with an ordinary rock drill without affecting the normal operation of the rock drill; the reverse-strike device of the present invention has a simple structure and is easy to use; the rock drill using the reverse-strike device can realize the reverse-strike function when the drill is stuck, and the vulnerable parts are easy to replace, resulting in a good user experience. Attached Figure Description

[0025] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a schematic diagram of the reverse-attack device according to Embodiment 1 of the present invention; Figure 2 This is a schematic diagram of a rock drill having the reverse-strike device of Embodiment 1 and in the first state; Figure 3 This is a schematic diagram of a rock drill having the reverse-strike device of Embodiment 1 and in the second state; Figure 4 This is a schematic diagram of the reverse-attack device according to Embodiment 2 of the present invention; Figure 5 yes Figure 4 A schematic diagram of the counter-attack device from another angle; Figure 6 This is a schematic diagram of a rock drill having the reverse-strike device of Embodiment 2 and in the first state; Figure 7 This is a schematic diagram of a rock drill having the reverse-strike device of Embodiment 2 and in the second state; Figure 8 This is a schematic diagram of the drive board of the counter-attack device according to Embodiment 2 of the present invention; Figure 9This is a schematic diagram of the rotating plate of the counter-attack device in Embodiment 2 of the present invention. Detailed Implementation

[0026] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. Furthermore, the technical features involved in the different embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0029] like Figures 1 to 9 As shown, the reverse-strike device 1 of the present invention is used in a rock drill 100.

[0030] The rock drill 100 includes a body 2, a shank 3 protruding from the body 2, and a drill rod 4 fixed to the shank 3. The drill rod 4 includes a drill bit 41 and a connecting sleeve 42. The connecting sleeve 42 is sleeved on the shank 3, and the diameter of the connecting sleeve 42 is larger than the diameter of the drill bit 41.

[0031] The machine body 2 includes a machine head 21, a gearbox 22, an intermediate body 23, a cylinder block 24, and other structures that are fixedly connected in sequence along the axial direction. An accumulator 25, an oil supply structure, a cleaning structure, etc., can also be fixedly installed at different positions on the machine body 2.

[0032] like Figure 1 , Figure 4 , Figure 5As shown, the anti-counterattack device 1 includes a fixing part 11 fixed on the body 2, an anti-counterattack cylinder 12 fixedly connected to the fixing part 11, and a supporting component 13 connected to the anti-counterattack cylinder 12.

[0033] The abutting component 13 has a first state of abutting against the connecting sleeve 42 along the axial direction and a second state of disengaging from the connecting sleeve 42.

[0034] like Figures 1 to 7 As shown, when the drill bit 41 is stuck, the holding assembly 13 is controlled to be in the first state. At this time, the holding assembly 13 abuts against the connecting sleeve 42 axially from one side of the drill bit 41. In this state, the rock drill 100 works, and the kinetic energy is transmitted to the shank 3 and the drill rod 4 in sequence, finally generating the forward extension force of the reverse cylinder 12. This forward extension force generates a pressure higher than that of the hydraulic system in the reverse cylinder 12. When the piston of the reverse cylinder 12 returns, the cylinder pressure is released to be equal to the system pressure of the rock drill 100, so that the reverse cylinder 12 strikes the drill rod 4 backward, forming a reverse impact energy corresponding to the drill rod 4, so that the drill bit 41 of the drill rod 4 is dislodged from the stuck state.

[0035] When the rock drill 100 is working normally, the supporting component 13 is controlled to be in the second state. At this time, the supporting component 13 is disengaged from the connecting sleeve 42 without affecting the normal axial movement of the drill rod 4.

[0036] This invention, by setting an independent reverse-strike device 1, can be used with a regular rock drill 100 without the need for a special drill bit 3, thus preventing the rock drill 100 from becoming too large. Since the length of the rock drill 100 remains unchanged, the rock drill 100 of this invention can be used in general equipment without lengthening the length of the rock drill's feed rail. In addition, it is simpler to replace consumables; they can be replaced normally after disassembling the drill head 21. The external reverse-strike device 1 can also reduce the cost of the rock drill 100 and reduce the structural complexity of the rock drill 100, thereby increasing its market penetration while reducing costs.

[0037] In this embodiment, the fixing part 11 is fixed between the machine head 21 and the gearbox 22. More specifically, the fixing part 11 has a plate-shaped portion located between the machine head 21 and the gearbox 22. The anti-blow cylinder 12 is subjected to an axial force, which fixes the fixing part 11 axially between the machine head 21 and the gearbox 22, thereby allowing the machine body 2 to absorb the reaction force of the anti-blow device 1.

[0038] In other embodiments, the fixing part 11 can also be fixed radially to the machine head 21 or the gearbox 22 by screws, bolts or other structures.

[0039] Furthermore, in this embodiment, the gearbox 22 includes a gearbox cover 221 near the drill rod 4, and the head 21, the fixing part 11, and the gearbox cover 221 are fixedly connected by double-ended bolts. The double-ended bolts tightly fix the head 21, the fixing part 11, and the gearbox cover 221. Double-ended bolts have a better fixing effect.

[0040] To ensure uniform force distribution on the fixing part 11, in this embodiment, the fixing part 11 protrudes radially from the machine body 2. Two reverse-action cylinders 12 are symmetrically arranged on both sides of the machine body 2, ensuring that both ends of the fixing part 11 are subjected to force simultaneously, thus guaranteeing uniform force distribution on both sides of the machine body 2. In some embodiments, more reverse-action cylinders 12 may be provided, arranged in a circular array. The purpose of this arrangement is to ensure even force distribution on the fixing part 11, preventing uneven force distribution from causing breakage of the drill rod 4 or the drill bit 3 during reverse-action.

[0041] For different implementations of the supporting component 13, the present invention provides the following two embodiments: Example 1: like Figures 1 to 3 As shown, in this embodiment, the supporting component 13 includes a supporting plate 131, a connecting plate 132 fixedly connected to the body 2, and a driving component.

[0042] The abutment plate 131 and the connecting plate 132 are rotatably connected by a pivot. The driving member is used to drive the abutment plate 131 to rotate relative to the connecting plate 132. A groove 1311 is provided on one side of the abutment plate 131 to make way for the drill bit 41.

[0043] When the abutment assembly 13 is in the first state, the abutment plate 131 abuts against the connecting sleeve 42 along the axial direction, the groove 1311 is used to make way for the drill bit 41, and the reverse hydraulic cylinder 12 is connected to the abutment plate 131 along the axial direction. When the abutment assembly 13 is in the second state, the abutment plate 131 rotates to disengage from the connecting sleeve 42.

[0044] In this embodiment, when reverse drilling is required, the drive unit starts to rotate the abutment plate 131, causing the abutment plate 131 to abut against the connecting sleeve 42. When the rock drill 100 needs to work normally, the drive unit drives the abutment plate 131 to rotate, causing the abutment plate 131 to disengage from the connecting sleeve 42, so as not to affect the reciprocating motion of the drill rod 4 of the rock drill 100.

[0045] To achieve the rotatable connection of the abutment plate 131, the connecting plate 132 protrudes from one end of the fixing part 11 toward the drill rod 4. In this embodiment, the abutment plate 131 is divided into two mutually inclined parts, wherein the first part is used to abut against the connecting sleeve 42, and the second part is used to pivotally connect with the connecting plate 132. In this embodiment, the connecting plate 132 is parallel to the axial direction of the drill rod 4.

[0046] In other embodiments, the connecting plate 132 may also be provided independently of the fixing part 11, such as being fixed separately to the body 2.

[0047] The focus of this embodiment is on how to control the connection between the abutment plate 131 and the anti-blow cylinder 12 in the first state. This embodiment provides the following specific solution: the driving component is the anti-blow cylinder 12 and the rotating connector 133 pivotally connected to the anti-blow cylinder 12.

[0048] The end of the rotating connector 133 away from the reverse cylinder 12 is pivotally connected to the connecting support plate 131. When the support assembly 13 is in the first state, the extension direction of the rotating connector 133 is parallel to the axis of the drill rod 4. When the support assembly 13 is in the second state, the extension direction of the rotating connector 133 is relatively inclined to the axis of the drill rod 4. The reverse cylinder 12 drives the rotating connector 133 to rotate to switch the support assembly 13 between the first state and the second state.

[0049] In this embodiment, only one anti-off cylinder 12 is needed to achieve the anti-off function and drive the abutment plate 131 to make way. The structure is simple and the cost is low.

[0050] The specific working method is as follows: When reverse drilling is required, the reverse drilling cylinder 12 drives the rotating connecting member 133 to move towards one side of the machine body 2. When the extension direction of the rotating connecting member 133 is parallel to the axis of the drill rod 4, the abutment plate 131 abuts against the connecting sleeve 42. At this time, the rock drill 100 is working, and the force exerted by the drill rod 4 on the abutment plate 131 is transmitted along the axial direction to the rotating connecting member 133 and the reverse drilling cylinder 12. When the rock drill 100 is working normally, the reverse drilling cylinder 12 drives the rotating connecting member 133 to move towards the side away from the machine body 2. The rotating connecting member 133, the abutment plate 131, and the connecting plate 132 all rotate relative to each other. The movement path of the abutment plate 131 away from the connecting sleeve 42 will not affect the normal operation of the rock drill 100.

[0051] In other embodiments, a drive unit independent of the anti-blow cylinder 12 can be provided to drive the support plate 131 to rotate independently, while the anti-blow cylinder 12 and the support plate 131 are still connected by the rotating connector 133.

[0052] Example 2: like Figures 4 to 9 As shown, in this embodiment, the supporting assembly 13 includes a drive plate 134 connected to the anti-impact cylinder 12, a rotating plate 135 rotatably fixed at one end on the drive plate 134, and a rotating cylinder 136 connected to the other end of the rotating plate 135.

[0053] When the abutting assembly 13 is in the first state, the rotating cylinder 136 drives the rotating plate 135 to rotate to abut against the connecting sleeve 42 along the axial direction.

[0054] When the supporting component 13 is in the second state, the rotating plate 135 can move away from the connecting sleeve 42 in the rotation direction or in the axial direction.

[0055] In this embodiment, there are two rotating plates 135, located on opposite sides of the drill rod 4. The rotating cylinder 136 is a double-headed cylinder, with both ends connected to the two rotating plates 135. The two ends of the rotating cylinder 136 simultaneously drive the rotating plates 135 to rotate. The axis of the drill rod 4 is perpendicular to the rotation direction of the rotating plates 135. Both rotating plates 135 have notches to allow space for the drill bit 41.

[0056] In other embodiments, only one rotating plate 135 may be provided, but relatively speaking, providing rotating plates 135 on both sides can make the force on the fixed part 11 more even.

[0057] A limiting shaft 1351 protrudes from the center of the rotating plate 135 towards the driving plate 134. A limiting groove 1341 is recessed on one side of the driving plate 134 facing the rotating plate 135. The limiting shaft 1351 protrudes into the limiting groove 1341, which restricts the rotation direction and distance of the rotating plate 135. In this embodiment, the two ends of the rotating cylinder 136 are only supported by the rotating plate 135. When the rotating cylinder 136 is started, it can simultaneously drive the rotating plates 135 on both sides to rotate, or it can drive one rotating plate 135 to rotate until it can no longer rotate, and then drive the other rotating plate 135 to rotate.

[0058] In this embodiment, the rotating plate 135 is rotated by an additional rotating cylinder 136, so that the counter-attack cylinder 12 only needs to complete the counter-attack work. The counter-attack cylinder 12 and the drive plate 134 are directly connected, resulting in a stronger connection.

[0059] The drive plate 134 has a first position near the connecting sleeve 42 and a second position near the body 2. The counter-attack cylinder 12 is used to control the drive plate 134 to move between the first position and the second position. When the abutting component 13 is in the first state, the drive plate 134 is located in the first position. When the abutting component 13 is in the second state, the drive plate 134 is located in the second position.

[0060] In this embodiment, when a counter-drilling operation is required, the drive plate 134 is controlled to be in the first position, while when the rock drill 100 is working normally, the drive plate 134 is controlled to be in the second position. In this way, when the rock drill 100 is working normally, the supporting components 13 are all far away from the drill rod 4 and will not interfere with the operation of the drill rod 4.

[0061] The drive plate 134 is located on the side of the rotating plate 135 away from the machine body 2. A clearance hole 1342 is formed in the middle of the drive plate 134 to allow the connecting sleeve 42 to pass through. The diameter of the clearance hole 1342 is larger than the diameter of the connecting sleeve 42. When the drive plate 134 switches from the second position to the first position, the rotating cylinder 136 drives the rotating plate 135 to rotate, thus making way for the connecting sleeve 42.

[0062] The present invention also provides a rock drill 100, which includes a reverse-strike device 1. The reverse-strike device 1 can be the reverse-strike device 1 in any of the above embodiments. The rock drill 100 only needs to reserve a position for mounting and fixing part 11 between the drill head 21 and the gearbox 22.

[0063] The present invention relates to a reverse-strike device 1 and a rock drill 100. The reverse-strike device 1 can be used in conjunction with a regular rock drill 100 without affecting the normal operation of the rock drill 100. The reverse-strike device 1 of the present invention has a simple structure and is easy to use. When the rock drill 100 using the reverse-strike device 1 is stuck, it can achieve the reverse-strike function. Moreover, the vulnerable parts are easy to replace, resulting in a good user experience.

[0064] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0065] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A reverse-strike device for a rock drill, the rock drill comprising a body, a shank protruding from the body, and a drill rod fixed to the shank, the drill rod comprising a drill bit and a connecting sleeve, the connecting sleeve being sleeved on the shank, the diameter of the connecting sleeve being larger than the diameter of the drill bit, characterized in that: The reverse-strike device includes a fixed part fixed to the machine body, a reverse-strike cylinder fixedly connected to the fixed part, and a holding assembly connected to the reverse-strike cylinder. The holding assembly has a first state of abutting against the connecting sleeve along the axial direction and a second state of disengaging from the connecting sleeve. When the holding assembly is in the first state, the holding assembly abuts against the connecting sleeve along the axial direction from one side of the drill bit. The drill bit shank drives the drill rod to reciprocate along the axial direction, and the reverse-strike cylinder drives the holding assembly to provide a reverse-strike force to the drill rod.

2. The counter-attack device according to claim 1, characterized in that: The machine body includes a machine head and a gearbox that are fixedly connected along the axial direction, and the fixing part is fixed between the machine head and the gearbox.

3. The anti-counterattack device according to claim 2, characterized in that: The gearbox includes a gearbox cover near the drill rod, and the head, the fixing part, and the gearbox cover are fixedly connected by double-ended bolts.

4. The counter-attack device according to claim 1, characterized in that: The fixing part protrudes radially from the machine body, and there are two reverse-action cylinders, which are symmetrically arranged on both sides of the machine body.

5. The counter-attack device according to any one of claims 1-4, characterized in that: The abutment assembly includes an abutment plate, a connecting plate fixedly connected to the machine body, and a driving component. The abutment plate and the connecting plate are rotatably connected via a rotating shaft. The driving component is used to drive the abutment plate to rotate relative to the connecting plate. A groove is provided on one side of the abutment plate to allow the drill bit to pass. When the abutment assembly is in the first state, the abutment plate abuts against the connecting sleeve along the axial direction, and the groove is used to allow the drill bit to pass. The reverse hydraulic cylinder is connected to the abutment plate along the axial direction. When the abutment assembly is in the second state, the abutment plate rotates to disengage from the connecting sleeve.

6. The counter-attack device according to claim 5, characterized in that: The connecting plate protrudes from one end of the fixing part toward one side of the drill rod.

7. The anti-counterattack device according to claim 5, characterized in that: The driving component is a reverse-action hydraulic cylinder and a rotating connector pivotally connected to the reverse-action hydraulic cylinder. The end of the rotating connector away from the reverse-action hydraulic cylinder is pivotally connected to the connecting support plate. When the support assembly is in the first state, the extension direction of the rotating connector is parallel to the axis of the drill pipe. When the support assembly is in the second state, the extension direction of the rotating connector is relatively inclined to the axis of the drill pipe. The reverse-action hydraulic cylinder drives the rotating connector to rotate to switch the support assembly between the first state and the second state.

8. The counter-attack device according to any one of claims 1-4, characterized in that: The abutting assembly includes a drive plate connected to the anti-impact cylinder, a rotating plate rotatably fixed on the drive plate at one end, and a rotating cylinder connected to the other end of the rotating plate. When the abutting assembly is in the first state, the rotating cylinder drives the rotating plate to rotate to abut against the connecting sleeve along the axial direction.

9. The counter-attack device according to claim 8, characterized in that: The number of rotating plates is two, and the two rotating plates are respectively located on both sides of the drill rod. The rotating cylinder is a double-headed cylinder, and the two ends of the rotating cylinder are respectively connected to the two rotating plates.

10. The anti-counterattack device according to claim 9, characterized in that: A limiting shaft protrudes from the center of the rotating plate toward the driving plate, and a limiting groove is recessed on the side of the driving plate toward the rotating plate. The limiting shaft protrudes into the limiting groove, and the limiting groove is used to limit the rotation direction and distance of the rotating plate.

11. The anti-counterattack device according to claim 8, characterized in that: The drive plate has a first position near the connecting sleeve and a second position near the machine body. The counter-actuating cylinder is used to control the drive plate to move between the first position and the second position. When the abutting component is in the first state, the drive plate is located in the first position. When the abutting component is in the second state, the drive plate is located in the second position.

12. The anti-counterattack device according to claim 8, characterized in that: The drive plate is located on the side of the rotating plate away from the machine body. A clearance hole is provided in the middle of the drive plate for the connecting sleeve to pass through. The diameter of the clearance hole is larger than the diameter of the connecting sleeve.

13. A rock drill, characterized in that: The rock drill includes a reverse-drilling device as described in any one of claims 1-12.

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