A slotting cutter head retractable type rock drill cutting integrated device

Abstract

The application discloses a kind of slotting cutter head telescopic type rock drill drilling and cutting integrated device, including drill rod assembly body, drill rod assembly body is sequentially provided with connecting sleeve assembly, advance limiting assembly, telescopic slotting cutter head assembly, retreat limiting assembly and air drill bit, telescopic slotting cutter head assembly includes sleeve and slotting cutter, two notches are symmetrically set on the two sides of sleeve;Slotting cutter includes cutter head and connecting plate, connecting plate and cutter head are integrated structure, connecting plate is located in the inside of sleeve, the other end of connecting plate extends to retreat limiting assembly and is penetrated sleeve, the side of connecting plate close to retreat limiting assembly is equipped with limit inclined plane one.The application adopts the above-mentioned structure of a kind of slotting cutter head telescopic type rock drill drilling and cutting integrated device, solves the problem of time-consuming and low efficiency of recovery equipment process after completing drilling and slotting process in the tunnel blasting excavation construction in the prior art, provides great convenience for blasting excavation work.

Description

Technical Field

[0001] This invention relates to the field of rock drilling equipment technology, and in particular to a retractable cutting head integrated drilling and cutting device for rock drilling machines. Background Technology

[0002] With the continuous development of the social economy and the steady progress of urbanization, the scale of highway engineering in my country has gradually expanded. Highway construction directly affects the future development of cities and people's transportation. Tunnels are a major component of highway construction. Tunnels and underground engineering, with their significant advantage of not occupying much surface land resources, are playing an increasingly important role in addressing the three major challenges of "population growth, resource shortage, and environmental degradation." In the past decade, my country's tunnel and underground engineering construction has developed rapidly. However, currently, there are still some major problems in the design and construction of highway tunnels in my country that urgently need to be solved.

[0003] For example, in drill-and-blast construction, over- and under-excavation of the surrounding rock is difficult to control. While the theory of shaped charge blasting is mature, the drilling and grooving processes for irregularly shaped blast holes are time-consuming. To improve the current situation where the directional effect of grooving for irregularly shaped holes is not good, Chinese invention patent CN202211288646.5 discloses an integrated drilling and cutting device for rock drills, including a drill rod assembly body. One end of the drill rod assembly body is fitted with a connecting sleeve assembly, and one end of the connecting sleeve assembly is fitted with a conventional tapered drill rod assembly. The surface of the conventional tapered drill rod assembly is fitted with a wear sleeve assembly and a grooving cutter assembly. A pneumatic drill bit is fixedly installed at the end of the conventional tapered drill rod assembly away from the drill rod assembly body. When drilling irregularly shaped blast holes, drilling and grooving are carried out simultaneously, thereby enabling drilling and grooving processes to be performed at the same time, reducing process time and improving efficiency.

[0004] However, its shortcomings include the tendency for the drill bit and cutting tool to jam or break when recovering the drill bit and cutting tool inside the surrounding rock after drilling and grooving are completed. Therefore, it is urgent to improve it in order to improve the current situation where it is easy to damage engineering equipment and waste human resources. Summary of the Invention

[0005] The purpose of this invention is to provide an integrated drilling and cutting device for rock drills with a telescopic cutting head, which solves the problem of time-consuming and inefficient equipment recovery process after drilling and cutting in tunnel blasting excavation, thus greatly facilitating blasting excavation work.

[0006] To achieve the above objectives, the present invention provides a retractable grooving cutter head integrated drilling and cutting device for rock drills, comprising a drill rod assembly body, on which a connecting sleeve assembly, a forward limiting assembly, a retractable grooving cutter head assembly, a backward limiting assembly, and a pneumatic drill bit are sequentially arranged. The retractable grooving cutter head assembly includes a sleeve and a grooving cutter. The sleeve is fitted onto the drill rod assembly body, and two slots are symmetrically arranged on both sides of the sleeve.

[0007] The grooving cutter includes a cutter head and a connecting plate. The cutter head extends through the groove to the outside of the sleeve. The connecting plate is an integral structure with the cutter head and is located inside the sleeve. One end of the connecting plate extends to one end of the sleeve and abuts against the inner wall of the sleeve. The other end of the connecting plate extends through the sleeve into the backstop assembly. A first limiting slope is provided on the side of the connecting plate near the backstop assembly. A second limiting slope matching the first limiting slope is provided inside the backstop assembly.

[0008] Preferably, the forward limiting component includes a wear sleeve and a conical limiting block. Both the wear sleeve and the conical limiting block are sleeved on the body of the drill rod assembly. The conical limiting block is fixedly connected to one side of the wear sleeve, and the smaller end of the conical limiting block extends into the sleeve.

[0009] Preferably, the retraction limiting component includes a limiting sleeve and a limiting spring. The limiting sleeve is sleeved on the body of the drill rod assembly. A limiting cavity is provided in the middle of the limiting sleeve. The limiting spring is located inside the limiting cavity and is disposed between the connecting plate and the inner wall of the limiting cavity.

[0010] Preferably, the limiting cavity is provided with a limiting inclined surface two forming a conical structure on the side near the sleeve.

[0011] Preferably, the inner diameter of the limiting cavity is smaller than the outer diameter of the sleeve, and the outer diameter of the limiting sleeve is larger than the outer diameter of the sleeve.

[0012] The beneficial effects of this invention are:

[0013] The integrated device provided by this invention features a retractable grooving cutter head. When drilling is required, the grooving cutter head opens outward to create a groove; when the drill bit needs to be retrieved, the grooving cutter head retracts inward. This facilitates the unobstructed retrieval of the drill bit located inside the rock mass, improving the time-consuming and inefficient process of retrieving the equipment after drilling and grooving in tunnel blasting excavation, and greatly facilitating blasting excavation work.

[0014] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of an embodiment of the integrated drilling and cutting device for a rock drill with a retractable grooving cutter head according to the present invention;

[0016] Figure 2This is a cross-sectional view of the telescopic grooving cutter head assembly of the integrated drilling and cutting device for rock drills of the present invention during grooving.

[0017] Figure 3 This is a cross-sectional view of the retractable grooving cutter head assembly of the rock drill drilling and cutting integrated device of the present invention during the retraction of the cutter head;

[0018] Figure 4 This is a partial enlarged view of part A of the retractable grooving cutter head rock drill integrated drilling and cutting device of the present invention;

[0019] Figure 5 This is a partial enlarged view of part B of the retractable grooving cutter head integrated drilling and cutting device for rock drills according to the present invention.

[0020] Figure label:

[0021] 1. Drill rod assembly body; 2. Connecting sleeve assembly; 3. Forward limit assembly; 301. Wear sleeve; 302. Conical limit block; 4. Telescopic grooving cutter head assembly; 401. Sleeve; 402. Grooving cutter; 4021. Cutter head; 4022. Connecting plate; 4023. Limiting inclined surface one; 5. Reverse limit assembly; 501. Limiting sleeve; 502. Limiting spring; 503. Limiting cavity; 504. Limiting inclined surface two; 505. Limiting protrusion; 6. Pneumatic drill bit. Detailed Implementation

[0022] The technical solution of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] Unless otherwise defined, the technical or scientific terms used in this invention shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0024] Example

[0025] Please see Figures 1 to 5As shown in the figure, this invention provides an integrated drilling and cutting device for a rock drill with a retractable grooving cutter head. It includes a drill rod assembly body 1, on which a connecting sleeve assembly 2, a forward limiting assembly 3, a retractable grooving cutter head assembly 4, a backward limiting assembly 5, and a pneumatic drill bit 6 are sequentially arranged. During drilling, the drill rod body moves forward to drill, driving the pneumatic drill bit 6 forward and rotating to perform drilling. During this forward movement, the retractable grooving cutter head assembly 4 experiences resistance and slides towards the rear of the drill rod assembly body 1. The forward limiting assembly 3 then blocks this movement and provides a forward pushing force, thus pushing the retractable grooving cutter head assembly 4 into the borehole to complete the grooving work and reach the predetermined drilling depth. Drilling and grooving are completed simultaneously. The drill rod assembly body retracts, and the backward limiting assembly 5 provides an external pushing force to pull out the retractable grooving cutter head assembly 4, resetting the drill rod and completing one drilling cycle.

[0026] The telescopic grooving head assembly 4 includes a sleeve 401 and a grooving blade 402. The sleeve 401 is sleeved on the body 1 of the drill rod assembly. Two slots are symmetrically arranged on both sides of the sleeve 401. The grooving blade 402 includes a blade head 4021 and a connecting plate 4022. The blade head 4021 extends through the slot to the outside of the sleeve 401 to perform grooving operations on the blast hole.

[0027] The connecting plate 4022 and the cutter head 4021 are an integral structure. The connecting plate 4022 is located inside the sleeve 401. One end of the connecting plate 4022 extends to one end of the sleeve 401 and abuts against the inner wall of the sleeve 401. The other end of the connecting plate 4022 extends through the sleeve 401 into the retraction limiting assembly 5. The side of the connecting plate 4022 near the retraction limiting assembly 5 is provided with a first limiting slope 4023. The retraction limiting assembly 5 is provided with a second limiting slope 504 that matches the first limiting slope 4023.

[0028] The forward limiting assembly 3 includes a wear sleeve 301 and a conical limiting block 302. Both the wear sleeve 301 and the conical limiting block 302 are sleeved on the body 1 of the drill rod assembly and fixedly connected thereto. The conical limiting block 302 is fixedly connected to one side of the wear sleeve 301. The smaller end of the conical limiting block 302 extends into the sleeve 401 and into the space between the two connecting plates 4022.

[0029] After the sleeve 401 and the grooving cutter 402 enter the borehole, they encounter resistance and move towards the forward limiting component 3. The forward limiting component 3 blocks the sleeve 401, and its conical limiting block 302 moves inward into the sleeve 401. Under the action of its conical surface, it squeezes the connecting plate 4022, causing the connecting plate 4022 to push the cutter head 4021 outward from the groove and providing a pushing force for the cutter head 4021 to perform grooving operations on the borehole. After the drilling and grooving work is completed, the outward pulling of the drill rod assembly body 1 sleeve 401 and the grooving cutter 402 encounters resistance and moves away from the forward limiting component 3. At this time, the conical limiting block 302 moves outward from the sleeve 401, and the connecting plate 4022 loses its outward squeezing force.

[0030] The retraction limiting assembly 5 includes a limiting sleeve 501 and a limiting spring 502. The limiting sleeve 501 is sleeved on the body 1 of the drill rod assembly. A limiting cavity 503 is provided in the middle of the limiting sleeve 501. The limiting spring 502 is located inside the limiting cavity 503 and is disposed between the connecting plate 4022 and the inner wall of the limiting cavity 503. A limiting inclined surface 504 with a conical structure is provided on the side of the limiting cavity 503 near the sleeve 401. A limiting protrusion 505 that intersects and connects with the limiting inclined surface is also provided inside the limiting cavity 503. The inner diameter of the limiting cavity 503 is smaller than the outer diameter of the sleeve 401, and the outer diameter of the limiting sleeve 501 is larger than the outer diameter of the sleeve 401.

[0031] When the retractable grooving cutter head assembly 4 moves to the outside of the borehole, the sleeve 401 and the grooving cutter 402 move towards the direction of the retraction limit assembly 5 after encountering resistance. At this time, the sleeve 401 pushes the connecting plate 4022 to move into the limit cavity 503. The first limit slope 4023 enters the limit cavity 503 after passing through the second limit slope 504, and under the action of the limit protrusion 505, it pushes the connecting plate 4022 to move towards the direction of the drill rod body. This causes the connecting plate 4022 to drive the cutter head 4021 to move into the sleeve 401, thereby realizing the retraction of the grooving cutter 402, reducing its overall outer diameter, and facilitating the unobstructed retraction of the drill bit inside the rock mass.

[0032] The specific working process is as follows: When drilling, the drill rod body moves forward to drill the hole. The drill rod body drives the pneumatic drill bit 6 to move forward and rotate to drill the hole. During the forward movement, the telescopic grooving cutter head assembly 4 is resisted and slides to the rear side of the drill rod assembly body 1. The forward limiting assembly 3 then blocks it and provides a forward pushing force. In addition, its conical limiting block 302 moves into the sleeve 401. Under the action of its conical surface, it squeezes the connecting plate 4022, causing the connecting plate 4022 to push the cutter head 4021 to move out of the groove and provide a pushing force to the cutter head 4021 so that it can perform grooving operations on the blast hole.

[0033] When the predetermined drilling depth is reached, the drilling and grooving work are completed simultaneously. When the drill rod assembly body retracts to retract the cutter, it pulls the drill rod assembly body 1 outward. The sleeve 401 and the grooving cutter 402 are resisted and move away from the forward limit assembly 3. At this time, the conical limit block 302 moves to the outside of the sleeve 401, and the connecting plate 4022 loses the outward extrusion force. When the sleeve 401 and the grooving cutter 402 encounter resistance, they move towards the retraction limiting assembly 5. At this time, the sleeve 401 pushes the connecting plate 4022 into the limiting cavity 503. The first limiting inclined surface 4023 enters the limiting cavity 503 after passing through the second limiting inclined surface 504, and under the action of the limiting protrusion 505, it pushes the connecting plate 4022 towards the drill rod body. This causes the connecting plate 4022 to drive the cutter head 4021 to move into the sleeve 401, realizing the retraction of the grooving cutter 402, reducing its overall outer diameter, and facilitating the unobstructed retraction of the drill bit inside the rock mass. The retraction limiting assembly 5 provides an external thrust to the retractable grooving cutter head assembly 4, after which the drill rod resets, and one drilling cycle ends.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solutions of the present invention, and these modifications or equivalent substitutions cannot cause the modified technical solutions to deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A retractable grooving cutter head integrated drilling and cutting device for rock drills, comprising a chisel assembly body, wherein a connecting sleeve assembly, a forward limiting assembly, a retractable grooving cutter head assembly, a backward limiting assembly, and a pneumatic drill bit are sequentially arranged on the chisel assembly body, characterized in that: The retractable grooving head assembly includes a sleeve and a grooving cutter. The sleeve is fitted onto the body of the chisel assembly, and two slots are symmetrically arranged on both sides of the sleeve. The grooving cutter includes a cutter head and a connecting plate. The cutter head extends through the groove to the outside of the sleeve. The connecting plate is an integral structure with the cutter head and is located inside the sleeve. One end of the connecting plate extends to one end of the sleeve and abuts against the inner wall of the sleeve. The other end of the connecting plate extends through the sleeve into the back-retracting limiting assembly. A limiting inclined surface one is provided on the side of the connecting plate near the back-retracting limiting assembly. A limiting inclined surface two that matches the limiting inclined surface one is provided inside the back-retracting limiting assembly. The forward limiting assembly includes a wear sleeve and a tapered limiting block. Both the wear sleeve and the tapered limiting block are sleeved on the body of the drill rod assembly. The tapered limiting block is fixedly connected to one side of the wear sleeve, and the smaller end of the tapered limiting block extends into the sleeve.

2. The integrated drilling and cutting device for a rock drill with a retractable grooving cutter head according to claim 1, characterized in that: The retraction limiting assembly includes a limiting sleeve and a limiting spring. The limiting sleeve is fitted onto the body of the drill rod assembly. A limiting cavity is provided in the middle of the limiting sleeve. The limiting spring is located inside the limiting cavity and is positioned between the connecting plate and the inner wall of the limiting cavity.

3. The integrated drilling and cutting device for a rock drill with a retractable grooving cutter head according to claim 2, characterized in that: The limiting cavity is provided with a limiting inclined surface two that forms a conical structure on the side near the sleeve.

4. The integrated drilling and cutting device for a rock drill with a retractable grooving cutter head according to claim 3, characterized in that: The inner diameter of the limiting cavity is smaller than the outer diameter of the sleeve, while the outer diameter of the limiting sleeve is larger than the outer diameter of the sleeve.

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