Rock splitting machine

Abstract

The utility model provides a rock splitting machine. The rock splitting machine solves the problems that a splitting tongue and a splitting petal of an existing splitting machine are large in abrasion, short in service life and low in drilling utilization rate. The splitting gun comprises a splitting gun barrel, a guide through groove is formed in the splitting gun barrel, two splitting petals are arranged in the guide through groove in a sliding fit mode, a closed lubricating cavity is defined by the two splitting petals and the splitting gun barrel, a communicating hole communicated with the lubricating cavity is formed in the upper end of the splitting gun barrel, and a splitting tongue is arranged in the communicating hole in a penetrating mode. After the sealing cavity is filled with lubricating oil, the splitting tongue and the splitting petals are lubricated and cooled. The circumferential surfaces of the outer surfaces of the splitting petals are large in upper portions and small in lower portions, gaps between the splitting petals and rock hole walls are large in upper portions and small in lower portions, the splitting tongues downwards push the splitting petals to horizontally and outwards move to form the effect that the splitting petals are gradually stressed from top to bottom to split rock, thrust of hydraulic cylinders is reduced under the effect, and friction force of contact surfaces of the splitting tongues and the splitting petals is reduced. The frictional wear of the joint surface of the splitting tongue and the splitting petal is reduced, and the service life of the splitting tongue and the splitting petal is effectively prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of rock splitters and relates to a rock splitter. Background Art

[0002] Rock splitters are widely used in various engineering construction environments due to their high efficiency, precision and safety. They use the principle of wedges to easily split rocks and concrete by controlling the extension and contraction of the piston rod. For example, a Chinese patent discloses a splitter with a booster cylinder [authorization announcement number CN206054425U], which includes a hydraulic cylinder, a first splitting block and a second splitting block are provided at the lower end of the hydraulic cylinder, a piston rod is provided under the hydraulic cylinder, and a middle wedge connected to the piston rod is provided between the first splitting block and the second splitting block.

[0003] The middle wedge block and the splitting block of the above-mentioned splitter are in surface contact. When the middle wedge block moves downward, huge friction is generated between the middle wedge block and the splitting block, which increases wear and reduces the service life of the middle wedge block and the splitting block. When working, the lower end of the middle wedge block has to extend a certain distance from the lower end of the splitting block. In order to reserve space for the lower end of the splitting block, the depth of the rock drilling hole has to be greater than the insertion length of the splitting block, resulting in low utilization of the drill hole and reduced drilling efficiency. Utility Model Content

[0004] The utility model aims to solve the above problems in the prior art and proposes a rock splitter which can reduce the wear of the splitting tongue and the splitting petal.

[0005] The purpose of the utility model can be achieved through the following technical solutions:

[0006] A rock splitter comprises a splitting gun barrel, wherein the splitting gun barrel is provided with a guide groove extending in a radial direction, wherein two symmetrically arranged splitting petals are slidably fitted in the guide groove, wherein a closed lubrication cavity for storing lubricating oil is formed between the two splitting petals and the splitting gun barrel, wherein a connecting hole connected to the lubrication cavity is provided at the upper end of the splitting gun barrel, wherein a splitting tongue is penetrated in the connecting hole, and wherein the lower part of the splitting tongue is slidably fitted in the lubrication cavity during splitting.

[0007] When working, the splitting tongue slides downward under the action of the hydraulic cylinder, and the inclined surfaces on both sides of the splitting tongue squeeze the inner inclined surfaces of the two splitting petals respectively, thereby pushing the two splitting petals to slide horizontally in the guide groove, so that the distance between the outer surfaces of the two splitting petals gradually increases, thereby splitting the rock. Due to the closed lubrication cavity, lubricating oil is added to the lubrication cavity through the connecting hole, which has the effect of lubricating and cooling the splitting tongue, reducing wear and effectively extending the service life of the splitting tongue and the splitting petals; the closed structure can also prevent external impurities from entering.

[0008] In the above-mentioned rock splitter, a sealing ring is provided between the splitting petal and the guide groove and surrounds the splitting petal. When the splitting petal moves radially outward along the splitting gun barrel to the maximum position under the action of the splitting tongue, the sealing ring is still located between the splitting petal and the guide groove to play a sealing role.

[0009] The split flap has an upper end face, a lower end face, an outer surface, an inner bevel and two oppositely arranged side faces. The inner bevels of the two split flaps are oppositely arranged, and the distance between the inner bevels of the two split flaps gradually decreases from top to bottom. The guide groove has an upper end face, a lower end face and two oppositely arranged side faces. The upper end of the split flap slides and seals with the upper end face of the guide groove, the lower end of the split flap slides and seals with the lower end face of the guide groove, and the side face of the split flap slides and seals with the side face of the guide groove. The sealing ring can improve the sealing performance of the lubrication cavity and prevent the leakage of lubricating oil and the entry of external impurities.

[0010] In the rock splitter, the splitting petal or the guide groove is provided with a ring groove surrounding the splitting petal, and the sealing ring is arranged in the ring groove. The ring groove is used to position the sealing ring to prevent the sealing ring from falling off when the splitting petal slides.

[0011] In the rock splitter, an oil groove connected to the connecting hole is provided on the inner inclined surface of the splitting flap. The oil groove includes a main oil groove extending up and down and an auxiliary oil groove extending obliquely or vertically relative to the main oil groove. The upper end of the main oil groove is connected to the connecting hole, the lower end of the main oil groove is closed, one end of the auxiliary oil groove is connected to the main oil groove, and the other end of the auxiliary oil groove is closed. The lubricating oil enters the main oil groove through the connecting hole, and then enters the auxiliary oil groove through the main oil groove, lubricating the inner inclined surface of the splitting flap and the inclined surface of the splitting tongue, reducing wear and thus increasing the service life.

[0012] In the above rock splitter, the outer surface of the splitting petal is provided with friction patterns.

[0013] In the above-mentioned rock splitting machine, the outer surface of the splitting petal is a conical surface which is larger at the top and smaller at the bottom. In the initial state, the lower end of the splitting tongue is higher than the lower end surface of the guide groove. When the splitting tongue moves downward and its lower end abuts against the lower end surface of the guide groove, the splitting petal moves radially outward along the splitting gun barrel to the maximum position.

[0014] The outer surface of the splitting gun barrel is also a conical surface with a larger upper part and a smaller lower part. The taper of the outer surface of the splitting petal is the same as the taper of the outer surface of the splitting gun barrel. In the initial state, the outer surface of the splitting petal and the outer surface of the splitting gun barrel are located on the same conical surface. The taper of the conical surface is very small and is determined according to the length of the splitting petal. Generally, the taper of the outer surface of a 1500mm long splitting petal is about 0.15°.

[0015] Since the outer surface of the splitting flap is a conical surface, the rock hole wall is gradually stressed, which greatly reduces the thrust required by the hydraulic cylinder, and reduces the friction between the splitting flap and the splitting tongue. Since the lower end of the splitting tongue is higher than the lower end surface of the guide groove in the initial state, and the lower end of the splitting tongue only abuts against the lower end surface of the guide groove when the splitting flap moves radially outward to the maximum position along the splitting barrel, the lower end of the splitting tongue does not extend out of the lower end surface of the splitting barrel during the whole process, thereby avoiding waste of drilling.

[0016] In the rock splitter, the lower end face of the guide groove has a slope that tilts downward from the inside to the outside along the sliding direction of the splitting flap, and the lower end face of the splitting flap is parallel to the lower end face of the guide groove and the two are arranged in a sliding manner. During operation, the splitting gun barrel is prevented from escaping from the hole wall by the friction between the outer surface of the splitting flap and the rock hole wall and the extrusion force of the lower end face of the splitting flap on the lower end face of the guide groove. The friction between the lower end face of the splitting flap and the lower end face of the guide groove is large. In order to reduce friction, the lower end face of the guide groove is tilted downward from the inside to the outside, and the angle between the lower end face of the guide groove and the horizontal plane is about 1°, that is, the lower end face of the guide groove is tilted downward from the center to both sides by about 1°, and when the splitting flap slides outward along the guide groove, the friction between the lower end face of the splitting flap and the lower end face of the guide groove can be reduced.

[0017] Since the downward inclination is very small, when the split petal gradually moves outward, its upper end surface and the upper end surface of the guide groove can still achieve effective sealing through the sealing ring.

[0018] In the rock splitter, the lower part of each of the splitting petal inner inclined surfaces is provided with a first mounting hole extending along the sliding direction of the splitting petal, and the first mounting holes on different splitting petal inner inclined surfaces are arranged opposite to each other. A reset tension spring for resetting the two splitting petals inward is installed in the first mounting hole, and the lower end of the splitting tongue has a yielding opening corresponding to the reset tension spring. One end of the reset tension spring is fixed in the first mounting hole of one of the splitting petal inner inclined surfaces, and the other end is fixed in the first mounting hole of the other splitting petal inner inclined surface. When the splitting petal moves outward under the action of the splitting tongue, the reset tension spring can reset the splitting petal.

[0019] In the above-mentioned rock splitter, a connecting flange is provided at the upper end of the splitting gun barrel, and two downwardly extending limit cards are detachably connected to the connecting flange. The limit cards are arranged opposite to the splitting petals one by one, and a compression spring for resetting the splitting petals inward is provided between the limit cards and the splitting petals opposite thereto. The compression spring extends along the sliding direction of the splitting petals, and when the splitting petals move outward under the action of the splitting tongue, the compression spring pushes the splitting petals to reset them. In order to prevent the compression spring from falling off, a second mounting hole is provided on the inner side of the limit card, and a third mounting hole is provided on the splitting petals. The second mounting hole is arranged opposite to the third mounting hole, and one end of the compression spring is located in the second mounting hole, and the other end of the compression spring is located in the third mounting hole.

[0020] In the rock splitter, the upper end of the splitting gun barrel is connected with a connecting sleeve, and an oil storage chamber for storing oil is arranged in the connecting sleeve. The oil storage chamber is connected with the lubrication chamber through a connecting hole to provide lubrication oil supply to the lubrication chamber.

[0021] Compared with the existing technology, this rock splitter has the following advantages:

[0022] The lubrication cavity is formed into a closed cavity by the sealing ring, and lubricating oil can be added therein to lubricate and cool the splitting tongue, thereby reducing wear and effectively extending the service life of the splitting tongue and the splitting flap, thereby reducing the use cost; the outer surface of the splitting flap has a certain taper, and when the splitting tongue moves downward, the splitting flap can gradually split the rock from top to bottom, reducing the thrust of the hydraulic cylinder, thereby reducing the friction force of the contact surface between the splitting tongue and the splitting flap, reducing the friction and wear of the joint surface between the splitting tongue and the splitting flap, and effectively extending the service life of the splitting tongue and the splitting flap; since the lower end face of the guide groove has an inclination that tilts downward from inside to outside along the sliding direction of the splitting flap, the lower end face of the splitting flap is parallel to the lower end face of the guide groove and the two are slidably matched, when the splitting flap slides outward along the guide groove, the friction between the lower end face of the splitting flap and the lower end face of the guide groove can be reduced; when the guide groove is provided on the splitting gun barrel, the cut material is used as the splitting flap, which effectively reduces the production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The utility model is a structural schematic diagram of a rock splitter provided by the utility model.

[0024] Figure 2 It is a cross-sectional view of the rock splitter provided by the utility model in an initial state.

[0025] Figure 3 It is a cross-sectional view of the rock splitter provided by the utility model when it is in a working state.

[0026] Figure 4 The utility model is a schematic structural diagram of a splitting gun barrel.

[0027] Figure 5 It is a structural schematic diagram of the split petal provided by the utility model.

[0028] Figure 6 It is a structural schematic diagram of the splitting tongue provided by the utility model.

[0029] Figure 7 It is a transverse cross-sectional view of the rock splitter provided in the first embodiment.

[0030] Figure 8 It is a transverse cross-sectional view of the rock splitter provided in the second embodiment.

[0031] Fig. 9 The utility model provides Figure 2 Enlarged schematic diagram at point A in the middle.

[0032] In the figure, 1, splitting barrel; 11, guide groove; 12, connecting hole; 13, connecting flange; 2, splitting petal; 21, oil groove; 22, friction pattern; 23, inclined surface; 24, first mounting hole; 3, splitting tongue; 31, give way; 4, sealing ring; 5, reset tension spring; 6, compression spring; 7, connecting sleeve; 8, limit card. DETAILED DESCRIPTION

[0033] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0034] Embodiment 1

[0035] like Figure 1 The rock splitter shown comprises a cylindrical splitting gun barrel 1, the upper end of which is provided with a connecting flange 13, a connecting sleeve 7 is connected to the connecting flange 13, and the upper end of the connecting sleeve 7 is connected to a hydraulic cylinder (not shown in the figure).

[0036] like Figure 4 As shown, the splitting gun barrel 1 is provided with a guide groove 11 extending along its radial direction, and two symmetrically arranged splitting petals 2 are slidably fitted in the guide groove 11, and a closed lubrication cavity is surrounded by the two splitting petals 2 and the splitting gun barrel 1. A connecting hole 12 connected to the lubrication cavity is provided at the upper end of the splitting gun barrel 1, and a splitting tongue 3 is penetrated in the connecting hole 12. During splitting, the lower part of the splitting tongue 3 is slidably fitted in the lubrication cavity, and the upper end of the splitting tongue 3 is connected to the piston rod of the hydraulic cylinder.

[0037] like Figure 5 As shown, the split flap 2 has an upper end surface, a lower end surface, an outer surface, an inner inclined surface, and two oppositely disposed side surfaces. The inner inclined surfaces of the two split flaps 2 are oppositely disposed, and the distance between the inner inclined surfaces of the two split flaps 2 gradually decreases from top to bottom. Figure 4 As shown, the guide groove 11 has an upper end face, a lower end face and two oppositely arranged side faces, the upper end of the split flap 2 slides and seals with the upper end face of the guide groove 11, the lower end of the split flap 2 slides and seals with the lower end face of the guide groove 11, and the side faces of the split flap 2 slide and seals with the side faces of the guide groove 11.

[0038] When splitting the rock, the splitting tongue 3 slides downward under the action of the hydraulic cylinder, and the inclined surfaces on both sides of the splitting tongue 3 squeeze the inner inclined surfaces of the two splitting petals 2 respectively, thereby pushing the two splitting petals 2 to slide horizontally in the guide groove 11, so that the distance between the outer surfaces of the two splitting petals 2 gradually increases, thereby splitting the rock. Since a closed lubrication cavity is provided, lubricating oil is added to the lubrication cavity through the connecting hole 12, which has the effect of lubricating and cooling the splitting tongue 3, reducing wear and effectively extending the service life of the splitting tongue 3 and the splitting petals 2.

[0039] like Figure 7 As shown, a sealing ring 4 is provided around the splitting flap 2 between the splitting flap 2 and the guide groove 11. When the splitting flap 2 moves radially outward to the maximum position along the splitting gun barrel 1 under the action of the splitting tongue 3, the sealing ring 4 is still located between the splitting flap 2 and the guide groove 11 to play a sealing role. The sealing ring 4 can improve the sealing performance of the lubrication cavity and prevent the leakage of lubricating oil and the entry of foreign impurities.

[0040] like Figure 7 As shown, a ring groove surrounding the split flap 2 is provided on the split flap 2, and a sealing ring 4 is arranged in the ring groove. The ring groove is used to position the sealing ring 4 to prevent the sealing ring 4 from falling off when the split flap 2 slides.

[0041] like Figure 5 As shown, an oil groove 21 connected to the connecting hole 12 is provided on the inner inclined surface of the split petal 2.

[0042] Specifically, Figure 5 As shown, the oil groove 21 includes a main oil groove extending up and down and a secondary oil groove extending obliquely or vertically relative to the main oil groove. The upper end of the main oil groove is connected to the connecting hole 12, and the lower end of the main oil groove is closed. One end of the secondary oil groove is connected to the main oil groove, and the other end of the secondary oil groove is closed. The lubricating oil enters the main oil groove through the connecting hole 12, and then enters the secondary oil groove through the main oil groove, lubricating the inner inclined surface of the splitting petal 2 and the inclined surface of the splitting tongue 3, reducing the wear between the two, thereby increasing the service life.

[0043] like Figure 5 As shown, the outer surface of the split petal 2 is provided with friction lines 22 .

[0044] In this embodiment, Figure 2 As shown, the outer surface of the splitting petal 2 is a conical surface which is larger at the top and smaller at the bottom. In the initial state, the lower end of the splitting tongue 3 is higher than the lower end surface of the guide groove 11; when the splitting tongue 3 moves downward and its lower end abuts against the lower end surface of the guide groove 11, the splitting petal 2 moves radially outward along the splitting gun barrel 1 to the maximum position.

[0045] When the guide groove 11 is opened on the splitting barrel 1, the cut material is used as the splitting petal 2, which effectively reduces the production cost. That is to say, the outer surface of the splitting barrel 1 is also a conical surface that is larger at the top and smaller at the bottom. The taper of the outer surface of the splitting petal 2 is the same as the taper of the outer surface of the splitting barrel 1. In the initial state, the outer surface of the splitting petal 2 and the outer surface of the splitting barrel 1 are located on the same conical surface. The taper of the conical surface is very small and is determined according to the length of the splitting petal 2. For example, the taper of the outer surface of a 1500mm long splitting petal 2 is about 0.15°. Figure 2 As shown, when the rock splitter is inserted into a rock borehole, the gap L1 between the upper portion of the splitting barrel 1 and the rock borehole wall is approximately 1 mm, and the gap L2 between the lower portion of the splitting barrel 1 and the rock borehole wall is approximately 5 mm.

[0046] Since the outer surface of the splitting flap 2 is a conical surface, the splitting flap 2 can gradually split the rock from top to bottom when the splitting tongue 3 moves downward. In the initial state, the lower end of the splitting tongue 3 is higher than the lower end surface of the guide groove 11, and the lower end of the splitting tongue 3 only abuts against the lower end surface of the guide groove 11 when the splitting flap 2 moves radially outward to the maximum position along the splitting gun barrel 1. During the whole process, the lower end of the splitting tongue 3 does not extend out of the lower end surface of the splitting gun barrel 1, thereby avoiding waste of drilling. The gap between the outer surface of the splitting flap 2 and the rock hole wall is small at the top and large at the bottom. The splitting tongue 3 pushes the splitting flap 2 downward to move horizontally outward to form a force-splitting effect from top to bottom, reducing the thrust of the hydraulic cylinder, reducing the friction force of the contact surface between the splitting tongue 3 and the splitting flap 2, reducing the friction and wear of the friction surface between the splitting tongue 3 and the splitting flap 2, and effectively extending the service life of the splitting tongue 3 and the splitting flap 2.

[0047] like Fig. 9 As shown, the lower end surface of the guide groove 11 has a slope α that slopes downward from the inside to the outside along the sliding direction of the split flap 2, and the lower end surface of the split flap 2 is parallel to the lower end surface of the guide groove 11 and the two are slidably matched. The angle α between the lower end surface of the guide groove 11 and the horizontal plane is about 1°, that is, the lower end surface of the guide groove 11 is tilted downward by about 1° from the center to both sides, and when the split flap 2 slides outward along the guide groove 11, the friction between the lower end surface of the split flap 2 and the lower end surface of the guide groove 11 can be reduced.

[0048] The downward inclination is very small. When the split petal 2 gradually moves outward, its upper end surface and the upper end surface of the guide groove 11 can still achieve effective sealing through the sealing ring 4.

[0049] like Figure 2 and Figure 5 As shown, the lower part of the inner inclined surface of each split petal 2 is provided with a first mounting hole 24 extending along the sliding direction of the split petal 2, and the first mounting holes 24 located on the inner inclined surfaces of different split petals 2 are arranged opposite to each other, as shown in FIG. Figure 3As shown, a return tension spring 5 is installed in the first mounting hole 24 for returning the two split petals 2 inwardly. Figure 6 As shown, the lower end of the splitting tongue 3 has a yielding opening 31 corresponding to the reset tension spring 5. Specifically, as Figure 3 As shown, one end of the reset spring 5 is fixed in the first mounting hole 24 of the inner inclined surface of one of the split petals 2, and the other end is fixed in the first mounting hole 24 of the inner inclined surface of the other split petal 2. When the split petal 2 moves outward under the action of the split tongue 3, the reset spring 5 can reset the split petal 2.

[0050] like Figure 4 As shown, the upper end of the splitting gun barrel 1 is provided with a connecting flange 13, and the outer edge of the connecting flange 13 is detachably connected to two downwardly extending limit cards 8 by screws. The limit cards 8 are arranged one by one opposite to the splitting petals 2, and a compression spring 6 for resetting the splitting petals 2 inward is arranged between the limit cards 8 and the splitting petals 2 opposite thereto. The compression spring 6 extends along the sliding direction of the splitting petals 2. When the splitting petals 2 move outward under the action of the splitting tongue 3, the compression spring 6 pushes the splitting petals 2 to reset it. In addition to being used to install the compression spring 6, the limit card 8 is also used to limit the splitting petals 2. When the splitting petals 2 move outward to the maximum position, the outer surface of the splitting petals 2 abuts against the limit card 8.

[0051] In order to prevent the compression spring 6 from falling off, Figure 2 and Figure 3 As shown, a second mounting hole is provided on the inner side of the limit card 8, and a third mounting hole is provided on the split petal 2. The second mounting hole and the third mounting hole are arranged opposite to each other, one end of the compression spring 6 is located in the second mounting hole, and the other end of the compression spring 6 is located in the third mounting hole.

[0052] In this embodiment, an oil storage chamber (not shown in the figure) for storing oil is provided in the connecting sleeve 7, and the oil storage chamber is connected to the lubrication chamber through the connecting hole 12 to provide lubrication oil supply to the lubrication chamber.

[0053] When working, the splitting gun barrel 1 is inserted into the rock drill hole, so that the lower end of the splitting gun barrel 1 is against the inner end of the rock drill hole. At this time, the splitting petal 2 is in the initial state under the action of the compression spring 6 and the return tension spring 5. Its structure is as follows: Figure 2 When the hydraulic cylinder is started, the piston rod of the hydraulic cylinder extends to drive the splitting tongue 3 to move downward, as shown in FIG. Figure 3 As shown, the splitting tongue 3 squeezes the inner slope of the splitting flap 2, causing the splitting flap 2 to move outward, and the splitting flap 2 gradually splits the rock from top to bottom. When the rock is split, the piston rod of the hydraulic cylinder is retracted to drive the splitting tongue 3 to move upward, and the splitting flap 2 is reset under the action of the compression spring 6 and the reset tension spring 5.

[0054] In actual use, in order to improve the cooling effect on the splitting petal 2 and the splitting tongue 3, relatively arranged oil inlet holes and oil outlet holes can be opened on the connecting flange 13, the oil inlet holes and the oil outlet holes are connected through a connecting pipe, and an external circulating lubrication device (such as an oil pump) is connected in series to the connecting pipe to form a flowing lubrication state in the sealing cavity.

[0055] Embodiment 2

[0056] The structural principle of this embodiment is basically the same as that of the first embodiment, except that Figure 8 As shown, the wall of the guide groove is provided with a ring groove surrounding the splitting gun barrel 1, and the sealing ring 4 is arranged in the ring groove.

[0057] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A rock splitter, characterized in that: The invention comprises a splitting gun barrel (1), wherein the splitting gun barrel (1) is provided with a guide groove (11) extending in the radial direction, wherein two symmetrically arranged splitting petals (2) are slidably matched in the guide groove (11), and a closed lubrication cavity is formed between the two splitting petals (2) and the splitting gun barrel (1), and a connecting hole (12) connected to the lubrication cavity is provided at the upper end of the splitting gun barrel (1), and a splitting tongue (3) is penetrated in the connecting hole (12), and the lower part of the splitting tongue (3) is slidably matched with the lubrication cavity during splitting.

2. The rock splitter according to claim 1, characterized in that: A sealing ring (4) is provided between the splitting flap (2) and the guide groove (11), and is arranged around the splitting flap (2). When the splitting flap (2) moves radially outwards along the splitting gun barrel (1) to a maximum position under the action of the splitting tongue (3), the sealing ring (4) is still located between the splitting flap (2) and the guide groove (11) to play a sealing role.

3. The rock splitter according to claim 2, characterized in that: The splitting petal or the guide through groove is provided with a ring groove surrounding the splitting petal, and the sealing ring is arranged in the ring groove.

4. The rock splitter according to claim 1, characterized in that: An oil groove (21) connected to the connecting hole (12) is provided on the inner inclined surface of the split petal (2).

5. The rock splitter according to claim 1, characterized in that: The outer surface of the split petal (2) is provided with friction lines (22).

6. The rock splitter according to claim 1, characterized in that: The outer surface of the splitting flap (2) is a conical surface that is larger at the top and smaller at the bottom. In an initial state, the lower end of the splitting tongue (3) is higher than the lower end surface of the guide groove (11). When the splitting tongue (3) moves downward and its lower end abuts against the lower end surface of the guide groove (11), the splitting flap (2) moves radially outward along the splitting gun barrel (1) to a maximum position.

7. The rock splitter according to claim 1 or 6, characterized in that: The lower end surface of the guide groove (11) has a slope that slopes downward from inside to outside along the sliding direction of the split flap (2), and the lower end surface of the split flap (2) is parallel to the lower end surface of the guide groove (11), and the two are slidably matched.

8. The rock splitter according to claim 1, characterized in that: A first mounting hole (24) extending along the sliding direction of the split flap (2) is provided at the lower part of the inner inclined surface of each split flap (2); the first mounting holes (24) located on the inner inclined surfaces of different split flaps (2) are arranged opposite to each other; a reset spring (5) for resetting the two split flaps (2) inward is installed in the first mounting hole (24); and the lower end of the split tongue (3) has a clearance opening (31) arranged corresponding to the reset spring (5).

9. The rock splitter according to claim 1, characterized in that: The upper end of the splitting gun barrel (1) is provided with a connecting flange (13), and two downwardly extending limit clamps (8) are detachably connected to the connecting flange (13). The limit clamps (8) are arranged opposite to the splitting flap (2), and a compression spring (6) is provided between the limit clamps (8) and the splitting flap (2) for returning the splitting flap (2) inward.

10. The rock splitter according to claim 1, characterized in that: The upper end of the splitting gun barrel (1) is connected to a connecting sleeve (7), and an oil storage cavity for storing oil is provided in the connecting sleeve (7).

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