Novel high-striking-power hydraulic breaking hammer

Abstract

The invention belongs to the technical field of hydraulic breaking hammers, and particularly relates to a novel high-hitting-power hydraulic breaking hammer. The hydraulic cylinder comprises a lower cylinder body, an upper cylinder body, a steel chisel and a piston, the upper end of the upper cylinder body is connected with a valve seat, an oil inlet valve assembly and an oil outlet valve assembly are fixedly installed on the two sides of the valve seat respectively, and a reversing valve is fixedly installed in the center of the valve seat. A lower cylinder cavity, a middle cylinder cavity and an upper cylinder cavity are sequentially formed in the upper cylinder body in the direction close to the valve seat. The upper cylinder body is provided with a plurality of first oil ducts communicated with the middle cylinder cavity, and second oil ducts communicated with the first oil ducts are arranged in the valve seat; an oil outlet channel is arranged in the valve seat, and the two ends of the oil outlet channel are connected with the reversing valve and the oil outlet valve assembly respectively. On the basis of a hydraulic driving piston of a breaking hammer in the prior art, new hydraulic driving force is added to replace nitrogen impact force, the pushing force on the stroke of the piston is larger, the pushing force in the stroke process is stable, the breaking effect of the breaking hammer is better, and the striking force is higher.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hydraulic breaking hammer, in particular to a new high-impact hydraulic breaking hammer. BACKGROUND

[0002] The breaking hammer is a device for breaking; the power source of the device is the pressure oil provided by the pump station of the excavator or loader, which can more effectively clean the floating stone and the soil in the rock gap in the action of excavating the building foundation.

[0003] The working principle of the nitrogen-hydraulic combined breaking hammer on the market is that the piston is pushed upward by the hydraulic oil, when the piston moves upward, the high-pressure nitrogen gas at the top of the cylinder body is pressurized and stored, the high-pressure nitrogen gas pressurizes the piston to generate a downward force, and at the same time, the reversing valve changes the flow direction of the hydraulic oil, so that the piston moves downward rapidly under the push of the nitrogen gas and the hydraulic oil; but the piston is assisted to move downward by the nitrogen medium, and a proper amount of nitrogen needs to be filled into the cylinder body before work; and the nitrogen-assisted impact force is unstable, the impact force gradually decreases with the movement of the piston rod stroke, and the breaking effect is not ideal. SUMMARY

[0004] In view of the deficiencies of the prior art, the present application provides a new high-impact hydraulic breaking hammer, which replaces the nitrogen impact in the prior art with hydraulic auxiliary impact, and the impact force is stable, overcoming the instability of the impact force of the nitrogen breaking hammer in the prior art, and aiming to solve the problems in the background art.

[0005] To achieve the above technical purposes, the specific technical solutions of the present application are as follows: the present application provides a new high-impact hydraulic breaking hammer, which comprises a lower cylinder body, an upper cylinder body, a steel drill and a piston; the upper end of the upper cylinder body is connected with a valve seat, the valve seat is fixedly connected with a rear seat, and the two sides of the valve seat are respectively fixedly installed with an oil inlet valve assembly and an oil outlet valve assembly, and the center of the valve seat is fixedly installed with a reversing valve; the inside of the upper cylinder body is provided with a lower cylinder cavity, a middle cylinder cavity and an upper cylinder cavity in sequence along the direction close to the valve seat; a plurality of first oil channels are provided on the upper cylinder body and communicated with the middle cylinder cavity, a second oil channel is provided in the valve seat and communicated with the first oil channel, and one end of the second oil channel is connected with the reversing valve; and an oil outlet channel is provided in the valve seat and connected with the reversing valve and the oil outlet valve assembly at both ends.

[0006] As a preferred technical solution of the present application, the oil inlet valve assembly comprises an oil inlet valve body, an oil inlet valve cavity is provided in the oil inlet valve body, a hollow structure of an oil inlet valve core is provided in the oil inlet valve body for sealing the oil inlet valve cavity, and an oil inlet port communicated with the oil inlet valve body is provided on the valve seat.

[0007] As a preferred technical scheme of the present application, the oil inlet valve core is provided with a first through hole in communication with the oil inlet valve cavity, the oil inlet valve body is fixedly connected with a spring seat at one end, and a first elastic member is fixedly connected between the spring seat and the oil inlet valve core.

[0008] As a preferred technical scheme of the present application, the valve seat is internally provided with an oil inlet channel, the two ends of the oil inlet channel are respectively connected with the oil inlet valve assembly and the reversing valve, the upper cylinder body is internally provided with an oil return channel, one end of the oil return channel is connected with the oil inlet channel, and the other end is connected with the reversing valve.

[0009] As a preferred technical scheme of the present application, the oil outlet valve assembly comprises an oil outlet valve body, the oil outlet valve body is internally provided with an oil outlet valve cavity, and the oil outlet valve body is internally connected with an oil outlet valve core for sealing the oil outlet valve cavity; the valve seat is internally provided with a cavity, the cavity is in communication with the oil outlet channel, and the oil outlet valve body is provided with a second through hole, and the cavity is in communication with the oil outlet valve cavity through the second through hole.

[0010] As a preferred technical scheme of the present application, the valve seat is provided with an oil outlet hole, the oil outlet valve body is provided with a third through hole, and the oil outlet valve cavity is in communication with the oil outlet hole through the third through hole.

[0011] As a preferred technical scheme of the present application, the oil outlet valve body is fixedly connected with a sealing seat at one end, and a second elastic member is fixedly connected between the oil outlet valve core and the sealing seat.

[0012] As a preferred technical scheme of the present application, the lower cylinder body is fixedly connected with a limiting sleeve and a guide sleeve matched with the steel drill.

[0013] The beneficial effects in the present application are: 1. By increasing a new hydraulic driving force to replace the nitrogen impact force on the basis of the hydraulic driving piston of the prior art breaking hammer, the driving force of the present application on the piston stroke is larger than that of the nitrogen, and the thrust is stable during the stroke process, so that the breaking effect of the breaking hammer is better, and the impact strength is stronger.

[0014] 2. By being provided with a valve seat, an oil inlet valve assembly, an oil outlet valve assembly and a reversing valve, the flow direction of the hydraulic oil can be automatically controlled; when the hydraulic oil pushes the piston, the oil outlet valve assembly is closed, when the piston returns, the flow direction of the hydraulic oil is automatically changed through the reversing valve, the oil outlet valve assembly is automatically opened, and the hydraulic oil flows out from the oil outlet valve assembly, so that the piston returns smoothly. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a structure schematic view of the breaking hammer of the present application.

[0016] Figure 2 It is a sectional view schematic view of the breaking hammer of the present application.

[0017] Figure 3 Fig. 1 is a schematic view of a valve seat according to the present application. Figure 2 Fig. 2 is a partial enlarged view of A in Fig. 1.

[0018] Figure 4 Fig. 3 is a partial enlarged view of B in Fig. 1. Figure 2 Fig. 4 is a partial enlarged view of C in Fig. 1.

[0019] Figure 5 Fig. 5 is a sectional view of the valve seat according to the present application.

[0020] Corresponding names of the reference numerals in the drawings are as follows: 1, lower cylinder body; 2, upper cylinder body; 21, lower cylinder cavity; 22, middle cylinder cavity; 23, upper cylinder cavity; 24, first oil passage; 25, oil return passage; 3, valve seat; 31, oil inlet; 32, oil outlet hole; 33, oil inlet passage; 34, oil outlet passage; 35, second oil passage; 36, cavity; 4, steel drill; 5, rear seat; 6, reversing valve; 7, oil inlet valve assembly; 71, oil inlet valve body; 72, oil inlet valve core; 73, first through hole; 74, oil inlet valve cavity; 75, spring seat; 76, first elastic member; 8, oil outlet valve assembly; 81, oil outlet valve body; 82, oil outlet valve core; 83, second through hole; 84, oil outlet valve cavity; 85, sealing seat; 86, second elastic member; 87, third through hole; 9, piston; 10, guide sleeve; 11, limiting sleeve. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application.

[0022] Embodiment one: the present embodiment discloses a new type of high-impact force hydraulic breaking hammer, like Figures 1-5As shown, including the lower cylinder body 1, the upper cylinder body 2, the steel drill 4 and the piston 9, the steel drill 4 is connected in the lower cylinder body 1, the piston 9 is connected in the upper cylinder body 2, wherein, in the present embodiment, the driving force adopted by the stroke and return of the piston 9 is the same as that of the prior art, which is realized by the cooperation of external hydraulic oil and the reversing device, and the specific principle is not described here; Wherein, the difference between the present embodiment and the prior art is that the nitrogen chamber at the top of the upper cylinder body 2 is cancelled, that is, the nitrogen auxiliary push to stroke the piston is cancelled, but the upper end of the upper cylinder body 2 is connected with the valve seat 3, the rear seat 5 is fixedly connected on the valve seat 3, and the oil inlet valve assembly 7 and the oil outlet valve assembly 8 are respectively fixedly installed on both sides of the valve seat 3, and the reversing valve 6 is fixedly installed in the center of the valve seat 3, the structure and working principle of the reversing valve 6 in the present embodiment are the same as those of the hydraulic oil reversing valve in the prior art, and the specific structure is not described here; The difference between the upper cylinder body 2 and the prior art is that the lower cylinder cavity 21, the middle cylinder cavity 22 and the upper cylinder cavity 23 are sequentially arranged in the upper cylinder body 2 along the direction close to the valve seat 3, while only the lower cylinder cavity 21 and the upper cylinder cavity 23 are arranged in the upper cylinder body 2 in the prior art; Wherein the lower cylinder cavity 21 and the upper cylinder cavity 23 are communicated with the external oil circuit to control the reciprocating movement of the piston; Four first oil channels 24 are arranged on the upper cylinder body 2 and communicated with the middle cylinder cavity 22, the second oil channel 35 is arranged in the valve seat 3 and communicated with the first oil channel 24, one end of the second oil channel 35 is connected with the reversing valve 6; The oil outlet channel 34 is arranged in the valve seat 3 and connected with the reversing valve 6 and the oil outlet valve assembly 8 at both ends; The hydraulic oil enters the reversing valve 6 through the oil inlet valve assembly 7, pushes the valve core of the reversing valve 6 to move, enters the first oil channel 24 through the second oil channel 35, and then enters the middle cylinder cavity 22, pushes the piston 9 to move downward to stroke, and impacts the steel drill 4; When the piston 9 moves upward to return, the hydraulic oil in the middle cylinder cavity 22 is extruded, the hydraulic oil returns to the reversing valve 6 through the first oil channel 24 and the second oil channel 35, the valve core moves reversely, the second oil channel 35 and the oil outlet channel 34 are communicated, the hydraulic oil enters the oil outlet valve assembly 8 through the oil outlet channel 34, opens the oil outlet valve assembly 8, and finally flows back to the oil pump from the oil outlet valve assembly 8, forms a cycle, and makes the piston 9 return smoothly; The above actions are repeated to realize the continuous reciprocating movement of the piston 9; Compared with the prior art, the present embodiment cancels the nitrogen auxiliary push to the piston, but adopts the valve seat 3, the oil inlet valve assembly 7, the oil outlet valve assembly 8 and the reversing valve 6, increases the second oil circuit control structure on the basis of the hydraulic oil pushing the piston 9 to move, and assists the piston to move, which is better than the nitrogen auxiliary push, the impact force of the piston in the present embodiment is larger and more stable, and the breaking effect on the rock or road surface is better.

[0023] Preferably, the lower cylinder body 1 is fixedly connected with the limiting sleeve 11 matched with the steel drill 4 and the guide sleeve 10, the limiting sleeve 11 controls the stroke of the steel drill 4, and the guide sleeve 10 plays a stabilizing role for the steel drill 4.

[0024] Embodiment Two: Based on the structure of Embodiment One, as shown in Figure 3 The oil inlet valve assembly 7 includes an oil inlet valve body 71 fixedly connected with the valve seat 3, an oil inlet valve cavity 74 is arranged in the oil inlet valve body 71, a hollow oil inlet valve core 72 for sealing the oil inlet valve cavity 74 is arranged in the oil inlet valve body 71, the upper end of the oil inlet valve core 72 is closed and the lower end is open; the oil inlet valve core 72 can open the oil inlet valve cavity 74 when moving downward, the valve seat 3 is provided with an oil inlet port 31 in communication with the oil inlet valve body 71, the oil inlet port 31 is arranged at the upper end position of the oil inlet valve body 71; the surface of the oil inlet valve core 72 is provided with a first through hole 73 in communication with the oil inlet valve cavity 74, one end of the oil inlet valve body 71 is fixedly connected with a spring seat 75, a first elastic member 76 is fixedly connected between the spring seat 75 and the oil inlet valve core 72, and the first elastic member 76 is a compression spring; the hydraulic oil enters the oil inlet valve body 71 through the oil inlet port 31, drives the oil inlet valve core 72 to move downward, opens the oil inlet valve cavity 74, enters the oil inlet valve cavity 74, then enters the oil inlet valve core 72 through the first through hole 73, and finally flows into the reversing valve 6 through the oil inlet channel 33; and the structure of the oil inlet valve assembly 7 in this embodiment has a non-return function, the hydraulic oil cannot flow back and can only flow in one direction, avoiding backflow of the hydraulic oil.

[0025] The valve seat 3 is provided with an oil inlet channel 33, the two ends of the oil inlet channel 33 are connected with the oil inlet valve assembly 7 and the reversing valve 6 respectively, the upper cylinder body 2 is provided with an oil return channel 25, one end of the oil return channel 25 is connected with the oil inlet channel 33 and the other end is connected with the reversing valve 6; the hydraulic oil is divided into two paths through the oil inlet channel 33, one path flows into the reversing valve 6 and the other path flows into the oil return channel 25, and finally flows back into the reversing valve 6.

[0026] Embodiment Three: Based on the structure of Embodiment One or Embodiment Two, as shown in Figures 4-5As shown, the oil outlet valve assembly 8 of the embodiment includes an oil outlet valve body 81 fixedly connected with the valve seat 3, the oil outlet valve body 81 is provided with an oil outlet valve cavity 84, and the oil outlet valve body 81 is internally connected with an oil outlet valve core 82 for sealing the oil outlet valve cavity 84; the valve seat 3 is internally provided with a cavity 36, the cavity 36 is communicated with the oil outlet channel 34, and the oil outlet valve body 81 is provided with a second through hole 83, the cavity 36 is communicated with the oil outlet valve cavity 84 through the second through hole 83; one end of the oil outlet valve body 81 is fixedly connected with a sealing seat 85, the second elastic member 86 is fixedly connected between the oil outlet valve core 82 and the sealing seat 85, the second elastic member 86 is a compression spring, the valve seat 3 is provided with an oil outlet hole 32, the oil outlet valve body 81 is provided with a third through hole 87, and the oil outlet valve cavity 84 is communicated with the oil outlet hole 32 through the third through hole 87; during oil outlet, the hydraulic oil enters the cavity 36 through the oil outlet channel 34, then enters the oil outlet valve cavity 84 through the second through hole 83, the hydraulic oil drives the oil outlet valve core 82 to descend, the oil outlet valve cavity 84 is opened, the hydraulic oil flows downward through the oil outlet valve cavity 84, then flows into the oil outlet hole 32 through the third through hole 87, and finally flows back to the oil pump.

[0027] The overall working principle of the present application is as follows: the hydraulic oil flows into the reversing valve 6 through the oil inlet valve assembly 7, drives the valve core of the reversing valve 6 to move, and communicates the second oil channel 35, at this time, the oil outlet channel 34 and the second oil channel 35 are closed, the hydraulic oil enters the first oil channel 24 through the second oil channel 35, and then enters the middle cylinder cavity 22, drives the piston 9 to move downward stroke, and impacts the steel drill 4; when the piston 9 moves upward return stroke, the hydraulic oil in the middle cylinder cavity 22 is extruded, the hydraulic oil returns to the reversing valve 6 through the first oil channel 24 and the second oil channel 35, drives the valve core to move reversely, so that the second oil channel 35 and the oil outlet channel 34 can be communicated, the hydraulic oil in the reversing valve 6 enters the oil outlet valve assembly 8 through the oil outlet channel 34, drives the oil outlet valve assembly 8 to open, and finally flows back to the oil pump from the oil outlet valve assembly 8, forms a cycle, and makes the piston 9 return smoothly, with the flow of the hydraulic oil, the piston 9 is continuously driven to reciprocate.

[0028] Compared with the prior art, the present application cancels the nitrogen auxiliary driving mode of the piston, but adopts the structures of the valve seat 3, the oil inlet valve assembly 7, the oil outlet valve assembly 8 and the reversing valve 6, and on the basis of the hydraulic oil driving the piston 9 to reciprocate in the prior art, a new hydraulic oil path control system is added to assist the piston 9 to move stroke, compared with the nitrogen auxiliary driving mode, the impact force of the piston 9 is larger and more stable, and the breaking effect on the rock or road surface is better.

[0029] Finally, it should be noted that in the description of the present application, it should be noted that the terms "vertical", "upper", "lower", "horizontal" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0030] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent replacements to some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A novel high-impact hydraulic breaker, comprising a lower cylinder (1), an upper cylinder (2), a steel chisel (4), and a piston (9); characterized in that, The upper cylinder body (2) is connected to a valve seat (3), a rear seat (5) is fixedly connected to the valve seat (3), and an oil inlet valve assembly (7) and an oil outlet valve assembly (8) are fixedly installed on both sides of the valve seat (3), and a reversing valve (6) is fixedly installed in the center of the valve seat (3). The upper cylinder body (2) is provided with a lower cylinder chamber (21), a middle cylinder chamber (22) and an upper cylinder chamber (23) in sequence along the direction close to the valve seat (3); The upper cylinder body (2) is provided with at least one set of first oil passages (24) communicating with the middle cylinder cavity (22), and the valve seat (3) is provided with a second oil passage (35) communicating with the first oil passages (24). One end of the second oil passage (35) is connected to the reversing valve (6). Furthermore, the valve seat (3) is provided with an oil outlet passage (34), and the two ends of the oil outlet passage (34) are respectively connected to the reversing valve (6) and the oil outlet valve assembly (8).

2. The novel high-impact hydraulic breaker according to claim 1, characterized in that, The oil inlet valve assembly (7) includes an oil inlet valve body (71), an oil inlet valve chamber (74) is provided inside the oil inlet valve body (71), an oil inlet valve core (72) with a hollow structure for sealing the oil inlet valve chamber (74) is provided inside the oil inlet valve body (71), and an oil inlet (31) communicating with the oil inlet valve body (71) is provided on the valve seat (3).

3. A novel high-impact hydraulic breaker according to claim 2, characterized in that, The surface of the oil inlet valve core (72) is provided with a first through hole (73) communicating with the oil inlet valve cavity (74). One end of the oil inlet valve body (71) is fixedly connected to a spring seat (75), and a first elastic element (76) is fixedly connected between the spring seat (75) and the oil inlet valve core (72).

4. A novel high-impact hydraulic breaker according to claim 3, characterized in that, The valve seat (3) is provided with an oil inlet passage (33), and the two ends of the oil inlet passage (33) are respectively connected to the oil inlet valve assembly (7) and the reversing valve (6). The upper cylinder body (2) is provided with a return oil passage (25), one end of the return oil passage (25) is connected to the oil inlet passage (33), and the other end is connected to the reversing valve (6).

5. A novel high-impact hydraulic breaker according to claim 4, characterized in that, The oil outlet valve assembly (8) includes an oil outlet valve body (81), an oil outlet valve cavity (84) is provided inside the oil outlet valve body (81), and an oil outlet valve core (82) for sealing the oil outlet valve cavity (84) is connected inside the oil outlet valve body (81); the valve seat (3) is provided with a cavity (36) inside, the cavity (36) is connected to the oil outlet passage (34), and the oil outlet valve body (81) is provided with a second through hole (83), the cavity (36) is connected to the oil outlet valve cavity (84) through the second through hole (83).

6. A novel high-impact hydraulic breaker according to claim 5, characterized in that, The valve seat (3) is provided with an oil outlet hole (32), and the oil outlet valve body (81) is provided with a third through hole (87). The oil outlet valve cavity (84) is connected to the oil outlet hole (32) through the third through hole (87).

7. A novel high-impact hydraulic breaker according to claim 6, characterized in that, One end of the oil outlet valve body (81) is fixedly connected to a sealing seat (85), and a second elastic element (86) is fixedly connected between the oil outlet valve core (82) and the sealing seat (85).

8. A novel high-impact hydraulic breaker according to claim 7, characterized in that, The lower cylinder (1) is fixedly connected with a limiting sleeve (11) and a guide sleeve (10) that cooperate with the steel rod (4).

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