A rock drill and its conversion structure

Abstract

The present application discloses a rock drill and its conversion structure, including a rotating sleeve and an adjusting assembly, wherein the rotating sleeve is suitable for being sleeved on the lower piston and the drill bit in the rock drill, the rotating sleeve includes a first assembly part and a second assembly part, and the first assembly part and the second assembly part are connected by an elastic member; the adjusting assembly is suitable for rotating and switching the working state of the rock drill, and in the drilling state, the adjusting assembly is suitable for compressing the elastic member; in the crushing state, the adjusting assembly is suitable for releasing the compression. The present application provides a rotating sleeve and an adjusting assembly composed of a first assembly part and a second assembly part, wherein the first assembly part and the second assembly part are connected by an elastic member, and the adjusting assembly is suitable for compressing the elastic member and releasing the compression, so that the first assembly part and the second assembly part are controllably connected to the lower piston and the drill bit, realizing the control of the rock drill rotation, thereby realizing the function switching of the rock drill.

Description

Technical Field

[0001] The present application relates to the technical field of rock drills, and in particular to a rock drill and a conversion structure thereof. Background Art

[0002] A rock drill is a tool used to directly mine stone. It drills holes in the rock layer so that explosives can be placed to blast the rock, thereby completing the mining of stone or other stone projects. In addition, the rock drill can also be converted into a breaker to break hard layers such as concrete. The main structure and working principle of the rock drill are that a piston impact system is provided in the shell, a machine head shell is provided under the piston impact system, and the lower end of the machine head shell is connected to the drill bit, and the upper end of the drill bit can move up and down to penetrate the interior of the machine head shell. The piston impact system includes a lower piston that can do up and down reciprocating motion. The lower piston is used to impact the drill bit, and a drill rotation mechanism is also provided. When the lower piston returns, the drill rotation mechanism forces the drill bit to rotate an angle.

[0003] However, the existing rock drill has the following defects: it only has a single function of rotating the drill and impacting. When the rock drill is mainly used for crushing or compacting, the rock drill cannot have only the impact function, which is inconvenient to use. Summary of the invention

[0004] The purpose of the present application is to provide a conversion structure capable of switching the functions of a rock drill.

[0005] In order to achieve the above purpose, the technical solution adopted in the present application is: a conversion structure of a rock drill, including a rotating sleeve and an adjusting assembly, the rotating sleeve is suitable for being sleeved on the lower piston and the drill bit in the rock drill, the rotating sleeve includes a first combination part and a second combination part, and the first combination part and the second combination part are connected by an elastic member; the adjusting assembly is suitable for rotating and switching the working state of the rock drill, in the drilling state, the adjusting assembly is suitable for compressing the elastic member so that the first combination part and the second combination part are close to each other and the two ends are respectively connected to the lower piston and the drill bit, suitable for transmitting the rotation of the lower piston to the drill bit; in the crushing state, the adjusting assembly is suitable for releasing the compression of the elastic member so that the first combination part and the second combination part are suitable for moving away from each other under the action of the elastic member, and releasing the connection with the lower piston and the drill bit. The above structure realizes the switching of the rock drill function by controlling the rotating sleeve.

[0006] As a preferred embodiment, the adjustment assembly includes a conversion shaft, a spiral protrusion and a positioning groove, the conversion shaft is arranged on the head shell of the rock drill, and the conversion shaft is suitable for being inserted into the head shell through a positioning hole fixedly arranged on the head shell, the spiral protrusion is fixedly arranged on the front end surface of the conversion shaft, and the positioning groove corresponding to the spiral protrusion is fixedly opened on the outer wall of the rotating sleeve. The above structure is simple and stable.

[0007] As another preferred embodiment, the adjustment components have two groups, the positioning grooves have two groups and are respectively opened on the outer walls of the first combination part and the second combination part, the positioning holes have two groups and are symmetrically arranged on the head shell, and the two groups of adjustment components are suitable for respectively passing through one positioning hole to be inserted into the head shell, and are respectively connected to the first combination part and the second combination part through one positioning groove. The above structure reliably ensures the control of the first combination part and the second combination part.

[0008] Further preferably, the top of the rotating sleeve is provided with a keyway, the bottom of the lower piston is provided with a spline corresponding to the keyway, the bottom of the rotating sleeve is provided with a limit hole, and the top of the drill bit is in a shape that matches the limit hole and is suitable for inserting into the bottom of the rotating sleeve; when the rock drill is in a crushing state, the spiral protrusion is suitable for inserting into the positioning groove, and the first combination part and the second combination part are suitable for moving away from each other under the action of the elastic member, so that the keyway and the spline are separated from each other, and the inner wall of the limit hole and the drill bit are separated from each other. The above structure is used to realize the function of single punching without rotation in the crushing state.

[0009] It is further preferred that, by rotating the two conversion shafts, the two spiral protrusions are suitable for rotating out of the positioning groove and respectively abutting against the outer walls of the first combination part and the second combination part, and the two spiral protrusions are suitable for compressing the elastic member so that the first combination part and the second combination part are close to each other; the top of the rotating sleeve is provided with a keyway, the bottom of the lower piston is provided with a spline corresponding to the keyway, the bottom of the rotating sleeve is provided with a limiting hole, and the top of the drill is in a shape that matches the limiting hole and is suitable for inserting into the bottom of the rotating sleeve; when the rock drill is in the drilling state, the keyway abuts against the spline, and the top of the drill abuts against the inside of the limiting hole, so that when the lower piston rotates, the lower piston is suitable for driving the drill to rotate synchronously through the rotating sleeve. The above structure is used to realize the function of punching and rotating in the drilling state.

[0010] Further preferably, the front end of the spiral protrusion is provided with a stop surface, the stop surface is a vertical plane, when the stop surface abuts against the outer wall of the rotating sleeve, the spiral protrusion is suitable for receiving a horizontal force, and the bottom end of the conversion shaft is provided with a protrusion with a horizontal axis, the protrusion is suitable for engaging with the machine head shell to limit the horizontal movement of the conversion shaft. The above structure plays a role in maintaining the state.

[0011] Further preferably, the adjustment assembly further comprises a lever, the lever is fixedly arranged at the rear end of the conversion shaft, and the lever is in a semi-long elliptical structure, and rotating the lever is suitable for driving the conversion shaft to rotate synchronously. The above mechanism is convenient for users to operate the conversion shaft.

[0012] More preferably, a sealing member is provided in the positioning hole. The above structure plays a role of sealing.

[0013] Further preferably, the first assembly part and the second assembly part are symmetrically provided with receiving grooves, both ends of the elastic member are arranged in the receiving grooves, and the lateral length of the spiral protrusion is set so that when the spiral protrusion rotates out of the positioning groove, the spiral protrusion is suitable for compressing the elastic member until the first assembly part and the second assembly part touch each other. The above structure reliably ensures the connection between the first assembly part and the second assembly part and the lower piston and the brazing bit.

[0014] The present application also provides a rock drill, comprising the aforementioned conversion structure.

[0015] Compared with the prior art, the beneficial effects of this application are:

[0016] The present application adopts a technical means of setting a rotating sleeve and an adjusting assembly composed of a first combination part and a second combination part. The first combination part and the second combination part are connected by an elastic member, and the adjusting assembly is suitable for compressing the elastic member and releasing the compression, so that the first combination part and the second combination part can be controllably connected to the lower piston and the drill bit, thereby realizing the control of the rock drill rotation, thereby realizing the function switching of the rock drill. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of a rock drill;

[0018] Figure 2 It is a partial cross-sectional view of the rock drill;

[0019] Figure 3 This is a schematic diagram of the structure of the lower piston, the rotating sleeve and the drill bit in the drilling state of the conversion structure of the present application;

[0020] Figure 4 This is an exploded view of the lower piston, the rotating sleeve and the drill bit in the drilling state of the conversion structure of the present application;

[0021] Figure 5 This is a schematic diagram of the structure of the adjustment assembly and the rotating sleeve in the drilling state of the conversion structure of the present application;

[0022] Figure 6 This is a schematic diagram of the structure of the lower piston, the rotating sleeve and the drill bit in the crushing state of the conversion structure of the present application;

[0023] Figure 7 This is a schematic diagram of the structure of the adjustment assembly and the rotating sleeve when the conversion structure of the present application is in a broken state;

[0024] Figure 8 This is a schematic diagram of the structure of the regulating component in the conversion structure of the present application.

[0025] In the figure: 100, chisel; 1, machine head shell; 2, lower piston; 21, spline; 3, rotating sleeve; 31, first assembly part; 32, second assembly part; 33, limiting hole; 34, receiving groove; 35, keyway; 4, adjustment component; 41, conversion shaft; 411, raised part; 42, spiral raised part; 421, stop surface; 43, puller; 44, positioning groove; 5, elastic part. DETAILED DESCRIPTION

[0026] Below, the present application is further described in conjunction with specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0027] In the description of the present application, it should be noted that directional words, such as the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of narrating the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific scope of protection of the present application.

[0028] It should be noted that the terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0029] The terms "including" and "having" and any variations thereof in the specification and claims of this application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products or apparatuses.

[0030] like Figure 1-Figure 8 As shown, the preferred embodiments of the present application are:

[0031] A conversion structure of a rock drill comprises a rotating sleeve 3 and an adjusting assembly 4. The rotating sleeve 3 is suitable for being sleeved on a lower piston 2 and a drill 100 in the rock drill. The rotating sleeve 3 comprises a first assembly part 31 and a second assembly part 32, and the first assembly part 31 and the second assembly part 32 are connected by an elastic member 5. The adjusting assembly 4 is suitable for rotating and switching the working state of the rock drill. In the drilling state, the adjusting assembly 4 is suitable for compressing the elastic member 5 so that the first assembly part 31 and the second assembly part 32 are close to each other and the two ends are respectively connected to the lower piston 2 and the drill 100, so as to transmit the rotation of the lower piston 2 to the drill 100. In the crushing state, the adjusting assembly 4 is suitable for releasing the compression of the elastic member 5 so that the first assembly part 31 and the second assembly part 32 are suitable for moving away from each other under the action of the elastic member 5, and releasing the connection with the lower piston 2 and the drill 100.

[0032] The main structure and principle of the drill bit mechanism in most rock drills are as follows:

[0033] The drill turning mechanism also includes a ratchet, a pawl, a spring, a spiral rod and a spiral nut. The ratchet is fixedly arranged, the pawl is arranged on the spiral rod and is suitable for being inserted into the ratchet, the spiral rod is also fixedly provided with a spring, the spring is suitable for driving the pawl to engage with the ratchet, a threaded groove is provided on the other end of the spiral rod, and is suitable for being inserted into the lower piston 2 and connected with the spiral nut fixedly arranged in the lower piston 2; a keyway 35 is provided at the top of the rotating sleeve 3, a spline 21 corresponding to the keyway 35 is provided at the bottom end of the lower piston 2, a limiting hole 33 is provided at the bottom end of the rotating sleeve 3, and the top end of the drill 100 is in a shape adapted to the limiting hole 33 and is suitable for being inserted into the bottom end of the rotating sleeve 3; when the rock drill is in the drilling state, the keyway 35 is abutted against the spline 21, and the top end of the drill 100 is abutted against the inside of the limiting hole 33, so that when the lower piston 2 rotates, the lower piston 2 is suitable for driving the drill 100 to rotate synchronously through the rotating sleeve 3.

[0034] It can be concluded from the above structure that the drill turning function is mainly to realize the axial movement of the lower piston 2 into circumferential rotation through the cooperation of the spiral rod and the spiral nut, and then transmit the circumferential rotation of the lower piston 2 to the drill 100 through the rotating sleeve 3. Therefore, the inventor of the present application controls the combination and separation of the rotating sleeve 3, thereby controlling whether the rotating sleeve 3 and the lower piston 2 and the drill 100 are connected, thereby realizing the control of the drill turning function, thereby completing the control of the rock drill function switching.

[0035] In this embodiment, the adjustment component 4 includes a conversion shaft 41, a spiral protrusion 42 and a positioning groove 44. The conversion shaft 41 is arranged on the head shell 1 of the rock drill, and the conversion shaft 41 is suitable for being inserted into the head shell 1 through a positioning hole fixed on the head shell 1. The spiral protrusion 42 is fixed on the front end surface of the conversion shaft 41, and the positioning groove 44 corresponding to the spiral protrusion 42 is fixedly opened on the outer wall of the rotating sleeve 3. The user can realize the rotation of the spiral protrusion 42 by rotating the conversion shaft 41, and the combination and separation of the first combination part 31 and the second combination part 32 are realized through the cooperation of the spiral protrusion 42 and the positioning groove 44.

[0036] And, if Figure 2 , Figure 5 and Figure 7 As shown, in this embodiment, the adjustment assembly 4 has two groups, the positioning grooves 44 have two and are respectively opened on the outer walls of the first combination part 31 and the second combination part 32, and the positioning holes have two and are symmetrically arranged on the head shell 1. The two groups of adjustment assemblies 4 are suitable for respectively passing through a positioning hole to be inserted into the head shell 1, and are respectively connected to the first combination part 31 and the second combination part 32 through a positioning groove 44. The above structure is used for the user to strengthen the control of the rotating sleeve 3, and reliably ensures the stability of the connection between the rotating sleeve 3 and the lower piston 2 and the drill 100 when the rotating sleeve 3 is assembled.

[0037] like Figure 3-Figure 5As shown, in this embodiment, a keyway 35 is provided at the top of the rotating sleeve 3, a spline 21 corresponding to the keyway 35 is provided at the bottom end of the lower piston 2, a limiting hole 33 is provided at the bottom end of the rotating sleeve 3, and the top end of the drill 100 is in a shape adapted to the limiting hole 33 and is suitable for being inserted into the bottom end of the rotating sleeve 3; when the rock drill is in a crushing state, the spiral protrusion 42 is suitable for being inserted into the positioning groove 44, and the first combination part 31 and the second combination part 32 are suitable for being moved away from each other under the action of the elastic member 5, so that the keyway 35 and the spline 21 are moved away from each other, and the inner wall of the limiting hole 33 and the drill 100 are moved away from each other. The above structure is used to switch the rock drill into a crushing state. The main principle is: by fully inserting the spiral protrusion 42 into the positioning groove 44 matched therewith, the first combination part 31 and the second combination part 32 will move away from each other under the action of the elastic member 5 until the front end face of the spiral protrusion 42 and the bottom surface of the positioning groove 44 abut against each other. Therefore, the inventor of the present application arranges that when the front end face of the spiral protrusion 42 and the bottom surface of the positioning groove 44 abut against each other, the keyway 35 and the spline 21, the inner wall of the limiting hole 33 and the drill 100 do not touch each other, so that when the lower piston 2 rotates, the rotation cannot be transmitted to the drill 100 through the rotating sleeve 3. At this time, the drill 100 only performs impact, which is convenient for the user to use the rock drill for stone breaking and compaction.

[0038] like Figure 6-Figure 7 As shown, in this embodiment, the two conversion shafts 41 are rotated, and the two spiral protrusions 42 are suitable for rotating out of the positioning groove 44 and respectively abutting against the outer walls of the first combination part 31 and the second combination part 32, and the two spiral protrusions 42 are suitable for compressing the elastic member 5, so that the first combination part 31 and the second combination part 32 are close to each other; the top of the rotating sleeve 3 is provided with a keyway 35, the bottom end of the lower piston 2 is provided with a spline 21 corresponding to the keyway 35, the bottom end of the rotating sleeve 3 is provided with a limiting hole 33, and the top end of the drill 100 is in a shape adapted to the limiting hole 33 and is suitable for inserting into the bottom end of the rotating sleeve 3; when the rock drill is in the drilling state, the keyway 35 abuts against the spline 21, and the top end of the drill 100 abuts against the inside of the limiting hole 33, so that when the lower piston 2 rotates, the lower piston 2 is suitable for driving the drill 100 to rotate synchronously through the rotating sleeve 3. In contrast to the above-mentioned crushing state, in the drilling state, the spiral protrusion 42 abuts against the outer wall of the rotating sleeve 3, thereby achieving the approach and combination of the first combination part 31 and the second combination part 32, and achieving the contact between the keyway 35 and the spline 21, as well as the inner wall of the limiting hole 33 and the drill 100. At this time, the drill 100 both impacts and rotates, making it convenient for the user to use the rock drill to perform drilling work.

[0039] In addition, if Figure 8As shown, in this embodiment, a stop surface 421 is provided at the front end of the spiral protrusion 42, and the stop surface 421 is a vertical plane. When the stop surface 421 abuts against the outer wall of the rotating sleeve 3, the spiral protrusion 42 is suitable for being subjected to a horizontal force, and a protrusion 411 with a horizontal axis is provided at the bottom end of the conversion shaft 41, and the protrusion 411 is suitable for engaging with the head shell 1 to limit the horizontal movement of the conversion shaft 41. On the one hand, the above structure limits the horizontal movement of the conversion shaft 41 by engaging the protrusion 411 with the head shell 1, thereby compressing the rotating sleeve 3 and reliably ensuring the stability of the conversion shaft 41. On the other hand, by providing the stop surface 421 of the vertical plane, when the spiral protrusion 42 is completely rotated out of the positioning groove 44, the spiral protrusion 42 is mainly subjected to a horizontal force, and then remains stable through the above-mentioned protrusion 411, thereby achieving state maintenance.

[0040] Moreover, in this embodiment, the adjustment assembly 4 further includes a puller 43, which is fixedly arranged at the rear end of the conversion shaft 41, and the puller 43 is a semi-long elliptical structure, and the rotation of the puller 43 is suitable for driving the conversion shaft 41 to rotate synchronously. The above structure provides a tool for the user to control the rotation of the conversion shaft 41, which is convenient for the user to use.

[0041] Furthermore, in this embodiment, a sealing member is further provided in the positioning hole. The above structure plays a role in protecting the various parts in the head shell 1 and effectively prolongs the service life.

[0042] like Figure 5 and Figure 7 As shown, in this embodiment, the first combination part 31 and the second combination part 32 are symmetrically provided with the receiving grooves 34, both ends of the elastic member 5 are arranged in the receiving grooves 34, and the transverse length of the spiral protrusion 42 is set so that when the spiral protrusion 42 rotates out of the positioning groove 44, the spiral protrusion 42 is suitable for compressing the elastic member 5 until the first combination part 31 and the second combination part 32 touch each other. The above structure is used to place the elastic member 5, and by setting the transverse length of the spiral protrusion 42, when the spiral protrusion 42 rotates out of the positioning groove 44, the elastic member 5 can be completely compressed in the receiving groove 34, and the first combination part 31 and the second combination part 32 can touch each other, which not only fully and reasonably utilizes the space, but also further ensures the connection between the rotating sleeve 3 and the lower piston 2 and the drill 100.

[0043] It is worth mentioning that in the present embodiment, the elastic member 5 is made of a spring, and may also be made of other elastic materials such as elastic plastic.

[0044] The above describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited by the above embodiments, and the above embodiments and the specification only describe the principles of the present application. The present application may have various changes and improvements without departing from the spirit and scope of the present application, and these changes and improvements fall within the scope of the present application for which protection is sought. The scope of protection claimed by the present application is defined by the attached claims and their equivalents.

Claims

1. A conversion structure for a rock drill, characterized in that: The invention comprises a rotating sleeve and an adjusting assembly, wherein the rotating sleeve is suitable for being sleeved on the lower piston and the drill bit in the rock drill, the rotating sleeve comprises a first assembly part and a second assembly part, and the first assembly part and the second assembly part are connected by an elastic member; the adjusting assembly is suitable for rotating and switching the working state of the rock drill, and in the drilling state, the adjusting assembly is suitable for compressing the elastic member so that the first assembly part and the second assembly part are close to each other and the two ends are respectively connected to the lower piston and the drill bit, and are suitable for transmitting the rotation of the lower piston to the drill bit; in the crushing state, the adjusting assembly is suitable for releasing the compression of the elastic member, so that the first assembly part and the second assembly part are suitable for moving away from each other under the action of the elastic member, and releasing the connection with the lower piston and the drill bit.

2. A rock drill conversion structure according to claim 1, characterized in that: The adjustment component includes a conversion shaft, a spiral protrusion and a positioning groove. The conversion shaft is arranged on the head shell of the rock drill, and the conversion shaft is suitable for being inserted into the head shell through a positioning hole fixed on the head shell. The spiral protrusion is fixed on the front end surface of the conversion shaft, and the positioning groove corresponding to the spiral protrusion is fixedly opened on the outer wall of the rotating sleeve.

3. A conversion structure for a rock drill according to claim 2, characterized in that: The adjustment components have two groups, the positioning grooves have two groups and are respectively opened on the outer walls of the first combination part and the second combination part, the positioning holes have two groups and are symmetrically arranged on the head shell, and the two groups of the adjustment components are suitable for respectively passing through one of the positioning holes and inserted into the head shell, and are respectively connected to the first combination part and the second combination part through one of the positioning grooves.

4. A conversion structure for a rock drill according to claim 3, characterized in that: The top end of the rotating sleeve is provided with a keyway, the bottom end of the lower piston is provided with a spline corresponding to the keyway, the bottom end of the rotating sleeve is provided with a limiting hole, and the top end of the chisel is in a shape adapted to the limiting hole and is suitable for being inserted into the bottom end of the rotating sleeve; when the rock drill is in a crushing state, the spiral protrusion is suitable for being inserted into the positioning groove, and the first combination part and the second combination part are suitable for being moved away from each other under the action of the elastic member, so that the keyway and the spline are moved away from each other, and the inner wall of the limiting hole and the chisel are moved away from each other.

5. A conversion structure for a rock drill according to claim 3, characterized in that: By rotating the two conversion shafts, the two spiral protrusions are suitable for rotating out of the positioning groove and respectively abutting against the outer walls of the first combination part and the second combination part, and the two spiral protrusions are suitable for compressing the elastic member so that the first combination part and the second combination part are close to each other; a keyway is provided at the top of the rotating sleeve, a spline corresponding to the keyway is provided at the bottom end of the lower piston, a limiting hole is provided at the bottom end of the rotating sleeve, and the top end of the drill bit is in a shape adapted to the limiting hole and suitable for being inserted into the bottom end of the rotating sleeve; when the rock drill is in a drilling state, the keyway abuts against the spline, and the top end of the drill bit abuts against the inside of the limiting hole, so that when the lower piston rotates, the lower piston is suitable for driving the drill bit to rotate synchronously through the rotating sleeve.

6. A rock drill conversion structure according to claim 2, characterized in that: A stop surface is provided at the front end of the spiral protrusion, and the stop surface is a vertical plane. When the stop surface abuts against the outer wall of the rotating sleeve, the spiral protrusion is suitable for being subjected to a horizontal force, and a protrusion with a horizontal axis is provided at the bottom end of the conversion shaft, and the protrusion is suitable for being clamped with the head shell to limit the horizontal movement of the conversion shaft.

7. A rock drill conversion structure as claimed in claim 2, characterized in that: The adjustment component also includes a lever, which is fixedly arranged at the rear end of the conversion shaft and has a semi-long elliptical structure. Rotating the lever is suitable for driving the conversion shaft to rotate synchronously.

8. A rock drill conversion structure as claimed in claim 2, characterized in that: A sealing member is also provided in the positioning hole.

9. A rock drill conversion structure as claimed in claim 2, characterized in that: The first combination part and the second combination part are symmetrically provided with receiving grooves, both ends of the elastic member are arranged in the receiving grooves, and the lateral length of the spiral protrusion is set so that when the spiral protrusion rotates out of the positioning groove, the spiral protrusion is suitable for compressing the elastic member until the first combination part and the second combination part touch each other.

10. A rock drill, characterized in that: It comprises the conversion structure described in any one of claims 1-9.

Images