CN218971103U - Rock drill with shock-absorbing function - Google Patents

Abstract

The utility model provides a rock drill with a damping function, which comprises a front cylinder seat and an impact hammer, wherein a connecting sleeve is arranged between the front cylinder seat and the impact hammer, a drill shank is arranged in an inner cavity of the front cylinder seat and can axially move in the inner cavity of the front cylinder seat, the left end of the connecting sleeve is fixedly connected with the front cylinder seat, the right end of the connecting sleeve is fixedly connected with an impact cylinder of the impact hammer, and a damping cylinder is arranged in the connecting sleeve. The damping cylinder is additionally arranged between the front cylinder seat and the impact hammer to counteract the rebound force, so that the rock drill is ensured to have a stable working environment, and the service life of the rock drill is prolonged.

Description

Rock drill with shock-absorbing function

Technical Field

The utility model relates to the field of rock drill manufacturing, in particular to a rock drill with a damping function.

Background

Rock drills are tools used to mine rock directly by drilling blastholes in rock formations to receive explosives to blast the rock, thereby completing the rock or other stone work. When the rock drill works, the impact piston reciprocates to repeatedly strike the drill shank, the drill shank advances along the inner cavity of the front cylinder seat to drive the drill bit to contact with rock to break the rock into small stones, and in the process, the drill shank can be subjected to opposite resilience force, so that the rock drill vibrates, and the service life is further influenced.

Disclosure of Invention

The utility model aims to solve the technical problems that when a rock drill works, an impact piston reciprocates to repeatedly strike a drill shank, the drill shank advances along the inner cavity of a front cylinder seat to drive a drill bit to contact rock to break the rock into small stones, and in the process, the drill shank is subjected to opposite resilience force to cause the vibration of the rock drill so as to influence the service life.

The technical scheme adopted for solving the technical problems is as follows: the utility model provides a rock drill with shock-absorbing function, includes preceding jar seat and jump bit, preceding jar seat with be provided with the adapter sleeve between the jump bit, be provided with the drill shank in the inner chamber of preceding jar seat, the drill shank can be in follow axial displacement in the inner chamber of preceding jar seat, the left end of adapter sleeve with preceding jar seat fixed connection, the right-hand member of adapter sleeve with the impact cylinder fixed connection of jump bit, install the shock attenuation jar in the adapter sleeve.

Further: the inner cavity of the connecting sleeve is a three-section stepped inner cavity, the large diameter section of the three-section stepped inner cavity is arranged towards the left, the small diameter section of the three-section stepped inner cavity is arranged towards the right, the impact piston of the impact hammer can strike the drill shank from the right to the left through the three-section stepped inner cavity, the left part of the damping cylinder is provided with a boss protruding outwards in the radial direction, the right part of the damping cylinder is arranged in a sealing way with the middle diameter section of the three-section stepped inner cavity, the middle diameter section can move along the axial direction, and the outer wall of the boss is arranged in a sealing way with the large diameter section; the connecting sleeve is internally provided with a first oil duct, a second oil groove is circumferentially arranged on the left side of the middle diameter section on the large diameter section, the first oil duct is communicated with the second oil groove, and the first oil duct is connected with an energy accumulator.

Further: the front cylinder seat is internally provided with a damping ring, the damping ring is embedded in the inner cavity of the front cylinder seat and can move along the inner cavity of the front cylinder seat, the right part of the drill shank penetrates through the inner cavity of the damping ring, the left end face of the damping ring is gradually inclined towards the right from outside to inside, the drill shank is provided with a shaft shoulder matched with the left end face of the damping ring, and the shaft shoulder can be propped against the left end face of the damping ring.

Further: and an oil return throttle valve and an oil inlet throttle valve which are connected with the second oil groove are arranged on the connecting sleeve.

The utility model has the beneficial effects that the rock drill with the damping function counteracts the reactive force by adding the damping cylinder between the front cylinder seat and the impact hammer, thereby ensuring that the rock drill has a stable working environment and prolonging the service life of the rock drill. When the drill shank is subjected to right movement of the rebound force, the shaft shoulder is propped against the damping ring, the damping ring is pushed to move right by the damping cylinder, the space formed between the outer wall of the boss and the second oil groove is gradually reduced in the right movement process of the damping cylinder, so that the oil pressure in the inner part is gradually increased, the left pressure is formed on the right end face of the boss, the hard contact between the right end face of the boss and the right end face of the intermediate diameter section is avoided, and the rebound force is counteracted, so that the shock is absorbed.

Drawings

The utility model will be further described with reference to the drawings and examples.

Fig. 1 is a schematic view of a rock drill with damping function according to the present utility model;

FIG. 2 is a schematic diagram of the installation of the oil return throttle and the oil intake throttle.

In the figure, 1, a front cylinder seat, 2, a connecting sleeve, 21, a large-diameter section, 22, a small-diameter section, 23, a middle-diameter section, 3, a drill shank, 4, an impact cylinder, 5, a shock absorbing cylinder, 6, an impact piston, 7, a boss, 8, a first oil duct, 9, a second oil groove, 10, an energy accumulator, 11, a shock absorbing ring, 12, a shaft shoulder, 13, an oil return throttle valve, 14 and an oil inlet throttle valve.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model. On the contrary, the embodiments of the utility model include all alternatives, modifications and equivalents as may be included within the spirit and scope of the appended claims.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "connected," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art. Furthermore, in the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and further implementations are included within the scope of the preferred embodiment of the present utility model in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present utility model.

As shown in fig. 1, the utility model provides a rock drill with a damping function, which comprises a front cylinder seat 1 and an impact hammer, wherein a connecting sleeve 2 is arranged between the front cylinder seat 1 and the impact hammer, a drill shank 3 is arranged in an inner cavity of the front cylinder seat 1, the drill shank 3 can axially move in the inner cavity of the front cylinder seat 1, the left end of the connecting sleeve 2 is fixedly connected with the front cylinder seat 1, the right end of the connecting sleeve 2 is fixedly connected with an impact cylinder 4 of the impact hammer, and a damping cylinder 5 is arranged in the connecting sleeve 2.

The scheme counteracts the resilience force by adding the damping cylinder 5 between the front cylinder seat 1 and the impact hammer, thereby ensuring that the rock drill has a stable working environment and prolonging the service life of the rock drill.

The inner cavity of the connecting sleeve 2 is a three-section stepped inner cavity, a large diameter section 21 of the three-section stepped inner cavity is arranged leftwards, a small diameter section 22 of the three-section stepped inner cavity is arranged rightwards, the impact piston 6 of the impact hammer can strike the drill shank 3 from right to left through the three-section stepped inner cavity, a boss 7 protruding outwards along the radial direction is arranged at the left part of the shock absorption cylinder 5, the right part of the shock absorption cylinder 5 and a middle diameter section 23 of the three-section stepped inner cavity are arranged in a sealing way, the middle diameter section 23 can move along the axial direction, and the outer wall of the boss 7 and the large diameter section 21 are arranged in a sealing way; the connecting sleeve 2 is internally provided with a first oil duct 8, a second oil groove 9 is circumferentially arranged on the left side of the middle diameter section 23 on the large diameter section 21, the first oil duct 8 is communicated with the second oil groove 9, and the first oil duct 8 is connected with an energy accumulator 10.

The front cylinder seat 1 is internally provided with a shock absorption ring 11, the shock absorption ring 11 is embedded in the inner cavity of the front cylinder seat 1 and can move along the inner cavity of the front cylinder seat 1, the right part of the drill shank 3 is penetrated in the inner cavity of the shock absorption ring 11, the shape of the left end face of the shock absorption ring 11 is gradually inclined towards the right from outside to inside, the drill shank 3 is provided with a shaft shoulder 12 matched with the left end face of the shock absorption ring 11, and the shaft shoulder 12 can be propped against the left end face of the shock absorption ring 11.

When the drill shank 3 moves rightwards by the reverse elasticity, the shaft shoulder 12 is propped against the damping ring 11, the damping ring 11 is pushed to move rightwards by the damping cylinder 5, and in the process of moving rightwards by the damping cylinder 5, the space formed between the outer wall of the boss 7 and the second oil groove 9 is gradually reduced, so that the oil pressure in the inner part is gradually increased, the left pressure is formed on the right end face of the boss 7, the right end face of the boss 7 is prevented from being in hard contact with the right end face of the middle diameter section 23, and the reverse elasticity is counteracted, so that the shock is absorbed. The accumulator 10 is a well-known product in the prior art, and through the arrangement of the accumulator 10, the pressure pulsation in the damping system can be effectively relieved through the storage and release functions, the utilization rate of hydraulic energy can be improved, and redundant hydraulic oil can be absorbed.

Referring to fig. 2, the connecting sleeve 2 is provided with an oil return throttle valve 13 and an oil inlet throttle valve 14 connected with the second oil groove 9. The hydraulic pressure can be regulated by regulating the oil return throttle valve 13 and the oil inlet throttle valve 14, so that the pressure of the right end face of the boss 7 is controlled. Thereby the device obtains better shock attenuation effect.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

With the above-described preferred embodiments according to the present utility model as an illustration, the above-described descriptions can be used by persons skilled in the relevant art to make various changes and modifications without departing from the scope of the technical idea of the present utility model. The technical scope of the present utility model is not limited to the description, but must be determined according to the scope of claims.

Claims (4)

1. Rock drill with shock-absorbing function, its characterized in that: including preceding jar seat (1) and jump bit, preceding jar seat (1) with be provided with adapter sleeve (2) between the jump bit, be provided with bore bit tail (3) in the inner chamber of preceding jar seat (1), bore bit tail (3) can follow axial displacement in the inner chamber of preceding jar seat (1), the left end of adapter sleeve (2) with preceding jar seat (1) fixed connection, the right-hand member of adapter sleeve (2) with the impact cylinder (4) fixed connection of jump bit, install shock attenuation jar (5) in adapter sleeve (2).

2. A rock drill with damping function according to claim 1, characterized in that: the inner cavity of the connecting sleeve (2) is a three-section stepped inner cavity, a large diameter section (21) of the three-section stepped inner cavity is arranged leftwards, a small diameter section (22) of the three-section stepped inner cavity is arranged rightwards, an impact piston (6) of the impact hammer can strike the drill shank (3) from right to left through the three-section stepped inner cavity, a boss (7) protruding outwards along the radial direction is arranged at the left part of the damping cylinder (5), the right part of the damping cylinder (5) is arranged with a middle diameter section (23) of the three-section stepped inner cavity in a sealing way, and can move in the middle diameter section (23) along the axial direction, and the outer wall of the boss (7) is arranged with the large diameter section (21) in a sealing way;

be provided with first oil duct (8) in adapter sleeve (2), on big footpath section (21), be located the left side of pitch diameter section (23) is provided with second oil groove (9) along circumference, first oil duct (8) with second oil groove (9) are linked together, first oil duct (8) are connected with energy storage ware (10).

3. A rock drill with damping function as claimed in claim 2, characterized in that: install shock-absorbing ring (11) in preceding jar seat (1), shock-absorbing ring (11) inlay and establish in the inner chamber of preceding jar seat (1), and can follow the inner chamber of preceding jar seat (1) is removed, the right part of bore bit tail (3) is worn to establish in the inner chamber of shock-absorbing ring (11), the left end face shape of shock-absorbing ring (11) is the toper of outwards inwards gradually towards right side slope, be equipped with on bore bit tail (3) with left end face matched with shoulder (12) of shock-absorbing ring (11), shoulder (12) can support and hold on the left end face of shock-absorbing ring (11).

4. A rock drill with damping function according to claim 3, characterized in that: an oil return throttle valve (13) and an oil inlet throttle valve (14) which are connected with the second oil groove (9) are arranged on the connecting sleeve (2).

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