Hydraulic breaker without back head

Abstract

The present invention relates to an assembly structure without a back head, in which the block is manufactured in a polyhedral shape. For this purpose, the present invention relates to an assembly structure without a back head, in which the internal space of the polyhedral block is filled with compressed gas. The polyhedral block includes a main control valve that receives fluid from the outside, and a pilot valve that controls the main control valve is housed in the internal space of the polyhedron. Each double-acting cylinder operated by the main control valve moves the module connected to the piston load forward and backward, moving the integrated impact ram and ram block module forward, and the compressed gas filled in the block rapidly moves the integrated impact ram and ram block module backward, generating impact force.

Description

[Technical Field]

[0001] The present invention relates to a hydraulic breaker. More specifically, the present invention relates to a hydraulic breaker having a cylinder block with a polyhedral assembled structure and no back head. [Background Art]

[0002] Generally, hydraulic breakers are attached to construction machinery such as excavators and used for crushing, compacting and piling.

[0003] In FIG. 1 and FIG. 2, a hydraulic breaker can be seen that is configured of: a front head 300 which has an exterior formed of a rectangular shape and an interior formed of a cylindrical structure, and accommodates a chisel 200; a cylinder block 400 that accommodates an impact piston 600; two seal retainers 700; and a back head 500 filled with nitrogen gas, etc.

[0004] A general driving method for a hydraulic breaker is as follows: when the impact piston 600 moves forward receiving a supply of fluid from the outside, the flow path is switched by a switching valve 800, and the impact piston 600 rapidly moves backward under the pressure of the gas filled in the back head 500, thereby obtaining an impact force.

[0005] The impact piston is composed of a lower section, a middle section, and an upper section, and must have a long stroke to obtain an effective impact force. That is, each of the lower section, the middle section and the upper section must have an increased length. However, if it is intended to increase the stroke by 200 mm, the length of the lower section, the middle section and the upper section must each be increased by 200 mm, and when including the upper bush and the lower bush, the length of the impact piston becomes significantly long, forming a structure in which the stroke cannot be easily increased.

[0006] Furthermore, when the stroke of the impact piston increases, the length of the cylinder block and the back head also increase, which increases the overall size and weight of the structure, resulting in not only increased fuel consumption during operation of the construction machinery and higher production costs of the product, but also many other problems such as inconvenient handling.

[0007] Therefore, Korean Registered Patent No. 10-0820644 discloses a "backhead structure for a hydraulic breaker" for increasing the size of the backhead and increasing the capacity of the nitrogen gas filled inside in order to increase the filling pressure.

[0008] Such circuit breakers ultimately lead to an increase in the overall size of the structure, resulting in the same problems mentioned above. [Prior art documents] [Patent Documents]

[0009] [Patent Document 1] Korean Registered Patent Publication No. 10-0820644 [Overview of the project] [Problems that the invention aims to solve]

[0010] This invention aims to solve the above-mentioned problems by manufacturing the hydraulic breaker cylinder block as an assembly structure without a back head. This not only reduces the overall structure, but also allows for the design of an impact ram type without a piston section, resulting in a longer stroke distance and increased impact force, while the length of the impact ram is shortened, resulting in cost savings. Furthermore, the impact ram uses a seal in only one place on the impact ram cylinder to further reduce costs.

[0011] Furthermore, the assembly surfaces of the polyhedral plate material are sealed, and a seal retainer is applied to the ram cylinder to fill the sealed space with compressed gas, thereby replacing the function of the existing backhead.

[0012] Linear bearing block, hinge block, push rod and valve pressure adjustment rodThe purpose is to install block guides to prevent each module containing the impact ram from detaching when moving forward or backward, and to install numerous linear bearing blocks and linear bearing guides to ensure stable reciprocating movement of the impact ram and ram block modules in a straight line.

[0013] Furthermore, the objective is to provide a hydraulic breaker without a backhead that allows for easy replacement of internal consumables by making the cylinder block a polyhedron that can be disassembled and reassembled, thereby enabling timely replacement of consumables and maintaining optimal performance even during long-term use. [Means for solving the problem]

[0014] According to an embodiment of the present invention for addressing such technical challenges, a plate material is provided with numerous taps and bolt holes, gas inlets and oil inlets, and numerous pilot flow path holes connecting a main control valve and a pilot valve; a main control valve that receives fluid supply from the outside of the polyhedron; a pilot valve that controls the main control valve in a sealed space inside the polyhedron; an impact ram integrated with a ram block module; a ram cylinder on which the impact ram reciprocates; each double-acting cylinder operated by the main control valve; and each piston within each double-acting cylinder. rod It may include each module that is integrally coupled with the other, block guides that prevent each module from separating when it moves forward and backward, impact ram and ram block modules that move forward with each module, linear bearing guides that guide each module and the impact ram and ram block modules in a straight line, and compressed gas filled to push the forward impact ram and ram block modules backward to produce impact.

[0015] It further includes block guides to prevent each module from detaching when moving forward or backward.

[0016] A sealing treatment is performed on the assembling surfaces of plate materials assembled into a polyhedron, a seal retainer is applied to a ram cylinder, and a sealed space is filled with compressed gas.

[0017] Each module comprises a linear bearing block, a hinge block, a push rod and a valve push adjustment rod

[0018] Each double-acting cylinder comprises a piston rod a module coupled to

[0019] The hinge block comprises a locking portion that abuts against a protruding portion of the ram block module.

[0020] Two spools in a pilot valve, with respect to a seesaw plate shaft, when the two valve push adjustments rod press a spool protruding left and right, are cross-actuated by the seesaw plate each time.

[0021] The device further comprises a limit roller that separates the hinge block from the ram block module. [[Advantageous Effects of Invention]]

[0022] The hydraulic breaker without a back head according to the present invention has a cylinder block manufactured in a polyhedral shape, which not only reduces the overall structure and saves manufacturing costs, but also facilitates disassembly and assembly, allows consumables to be replaced in a timely manner, and thus maintains the optimal performance of the hydraulic breaker at all times.

[0023] A seal retainer is applied to a ram cylinder formed of a polyhedral assembly structure, and the sealed space is filled with compressed gas to fulfill the function of the eliminated back head.

[0024] ​Further, structurally changing the impact piston to an impact ram type without a piston portion can increase the stroke distance, improve the impact force of the hydraulic breaker, enhance work efficiency, and reduce fuel consumption. In addition, by applying a linear bearing block and a linear bearing guide, the length of the impact ram can be greatly reduced, and only one seal retainer is used in the ram cylinder, which has the advantage of reducing manufacturing and management costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] [Figure 1] It is a formation view of parts of a conventional hydraulic breaker. [Figure 2] It is a view showing a stroke section of a conventional piston. [Figure 3] It is a side structural view of the hydraulic breaker without a back head according to the present invention. [Figure 4] It is a planar structural view of the hydraulic breaker without a back head according to the present invention. [Figure 5] It is a side structural view of the first piston of the present invention when backward movement is completed. [Figure 6] It is a side structural view of the first piston of the present invention during forward movement. [Figure 7] It is a side structural view of the first piston of the present invention before forward movement is completed. [Figure 8] It is a side structural view of the first piston of the present invention when forward movement is completed. [Figure 9] It is a detailed view showing the driving method of the spool according to the present invention. MODE FOR CARRYING OUT THE INVENTION

[0026] Hereinafter, preferred embodiments of the hydraulic breaker without a back head according to the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, terms referring to the constituent elements of the present invention are named in consideration of the functions of the respective constituent elements, and therefore should not be understood as meaning limiting the technical constituent elements of the present invention.

[0027] Referring to Figures 1 to 9, the hydraulic breaker without a backhead according to the present invention is used for crushing, compaction, and pile driving when attached to construction machinery such as an excavator, and includes an impact ram, ram cylinder, ram block module, double-acting cylinder, module, main control valve, pilot valve, seal retainer, plate material, fastening tap, linear bearing block, linear bearing guide, and block guide.

[0028] A hydraulic breaker without a back head includes a plate material 100 with numerous fastening taps 7 and bolt holes (not shown), gas inlet, oil inlet, oil outlet (not shown), etc. The assembly surface of the plate material 100, which is assembled into a polyhedron, is sealed, and a seal retainer 80 is applied to the ram cylinder 50 to create a sealed space into which gas is filled.

[0029] The pressure of the filled gas functions to generate impact force by rapidly moving the forward-moving impact ram 40 and ram block module 60 backward.

[0030] Furthermore, the polyhedron-shaped plate material 100 has numerous pilot flow path holes 6 drilled into it, which connect the main control valve 70 and the pilot valve 71.

[0031] The main control valve 70 receives fluid from the outside and supplies it back into the plate material 100 via the pilot flow path hole 6. The internal space of the plate material 100 houses the main control valve 70 and a pilot valve 71 that controls the double-acting cylinders 20 and 21.

[0032] Referring to Figures 3 and 4, the first and second pistons receive fluid from the main control valve 70 and operate in a cross-directional manner in forward and reverse. rod With modules 10 and 11, and the integrated first and second modules 30 and 31, the integrated impact ram 40 and ram block module 60 move forward and then rapidly reverse due to gas pressure.

[0033] In other words, the first piston as a single unit rod When 10 and the first module 30 move forward, they move the impact ram 40 and the ram block module 60 forward together. When the forward-moving impact ram 40 and ram block module 60 move backward, the integrated second piston, which had been waiting, moves forward again. rod Modules 11 and the second module 31 move forward, advancing the combined impact ram 40 and ram block module 60.

[0034] To explain in more detail, referring to Figures 5 and 6, the first and second modules 30 and 31 are hinge block 1, push rod 2. Adjust valve pressure rod It includes 5 (the second module 31 also includes the same configuration as the first module 30), and moves in conjunction with the linear bearing block 90 by the linear bearing guide 91 and block guide 92 when moving forward or backward.

[0035] The first piston is controlled by the main control valve 70. rod The first module 30 moves forward along with 10, and the second piston rod The second module 31 moves backward along with 11, but when it moves backward, the hinge block 1 inside the second module 31 is limited rod It stands upright in close contact with 3, eliminating interference between the impact ram 40 and the ram block module 60 when they move backward.

[0036] Figure 6 shows the second piston rod When 11 moves forward, the push in the second module 31 rodAs the 2 pushes the hinge block 1, the locking portion 1a of the hinge block 1 comes into close contact with the protruding portion 60a of the ram block module 60, and moves forward with the impact ram 40. As shown in Figures 7 to 9, when the moving hinge block 1 comes into close contact with the limit roller 4, the limit roller 4 causes the hinge block 1 to stand upright along the inclined surface 1c formed on the hinge block 1 by the forward movement, separating it from the protruding portion 60a of the ram block module 60. The integrated impact ram 40 and ram block module 60 then rapidly reverse due to the pressure of the gas they are filled with, generating an impact force, which continues to press and adjust the valve in the second module 31 as it moves forward. rod When 5 pushes the protruding spool 72 inside the pilot valve 71, the A and B passages inside the pilot valve 71 switch, and the passage of the main control valve 70 (not shown) also switches, and the integrated second piston rod As module 11 and module 31 move in reverse, the integrated first piston, which had been waiting, moves in reverse simultaneously. rod As module 10 and the first module 30 move forward, the integrated impact ram 40 and ram block module 60, which are moved backward by compressed gas, move forward together with the second piston rod The operation is automatically repeated by performing the same actions as module 11 and module 31.

[0037] Each hinge block 1 has its own limit rod It stands upright, closely attached to 3 (one of which is not shown in the illustration).

[0038] Furthermore, the two spools 72 within the pilot valve 71 adjust the valve pressure based on the seesaw principle, with the seesaw plate shaft 72a as the reference point. rod Each time 5 is pressed on the left or right, the seesaw plate 72b moves in a cross-directional manner.

[0039] The technical ideas described in the embodiments of the present invention described above can be implemented independently or in combination with each other. Furthermore, although the present invention has been described through the embodiments described in the drawings and the detailed description of the invention, these are merely illustrative, and a wide variety of modifications and equivalent other embodiments are possible therefrom for a person with ordinary skill in the art to which the present invention pertains. Accordingly, the scope of technical protection of the present invention should be determined by the appended claims. [Industrial applicability]

[0040] The present invention relates to a hydraulic breaker, and more particularly to a hydraulic breaker in which the cylinder block has a polyhedral assembly structure and lacks a back head.

[0041] The hydraulic breaker without a backhead according to the present invention allows for the cylinder block to be manufactured in a polyhedral shape, which not only reduces the overall structure and saves manufacturing costs, but also facilitates disassembly and assembly, allowing for timely replacement of consumables and maintaining optimal hydraulic breaker performance at all times.

[0042] A seal retainer is applied to the ram cylinder, which is made up of a polyhedral assembly structure, and the sealed space is filled with compressed gas to fulfill the function of the removed backhead.

[0043] Furthermore, by restructuring the impact piston into an impact ram type without a piston section, the stroke distance is increased, improving the impact force of the hydraulic breaker, thereby increasing work efficiency and reducing fuel consumption. In addition, by applying a linear bearing block and linear bearing guide, the length of the impact ram is significantly reduced, and by using a seal retainer in only one place on the ram cylinder, there are advantages in saving manufacturing and management costs.

Claims

1. A plate material assembled into a polyhedron, with numerous taps and bolt holes, gas inlet and oil inlet processed, and a pilot flow path hole connecting the main control valve and pilot valve drilled in it, The main control valve receives fluid from the outside of the polyhedron, The sealed space inside the polyhedron contains the pilot valve that controls the main control valve, An impact ram that is integrated with the ram block module, The impact ram reciprocates in a ram cylinder, Each double-acting cylinder is operated by the main control valve, Each of the above-mentioned modules, which are integrally coupled to the piston rod inside each double-acting cylinder and include a hinge block and a push rod that pushes the hinge block, Each of the aforementioned modules includes a block guide to prevent detachment when moving forward or backward, The impact ram and the ram block module advance by each of the aforementioned modules, Each of the aforementioned modules and the impact ram and the ram block module are guided in a straight line by a linear bearing guide, The impact ram and the ram block module are pushed in reverse by a compressed gas that is filled to produce an impact. A hydraulic breaker without a backhead, characterized in that the push rod pushes the hinge block, causing the locking portion of the hinge block to come into close contact with the protruding portion of the ram block module, the impact ram and the ram block module to advance as each module moves forward, and when the advancing hinge block comes into close contact with the limit roller, the limit roller separates the hinge block from the protruding portion of the ram block module.

2. A hydraulic breaker without a backhead according to claim 1, characterized in that the polyhedral plate assembly portion is sealed, a seal retainer is applied to the ram cylinder, and compressed gas is filled into the sealed space.

3. Each of the aforementioned modules is, A linear bearing block, which moves in conjunction with each of the aforementioned modules and is moved by the linear bearing guide and the block guide during forward and reverse movement, A hinge block including a locking portion that contacts the protruding portion of the ram block module, A push rod that presses the hinge block to bring the locking portion of the hinge block into close contact with the protruding portion of the ram block module, A hydraulic breaker without a backhead according to claim 1, characterized in that it includes a valve push adjustment rod that pushes a protruding spool in the pilot valve as each of the modules advances.

4. The hydraulic breaker without a backhead according to claim 1, wherein the pilot valve is characterized by repeated crossing by the seesaw plate each time two spools in the pilot valve push a spool that protrudes with respect to the seesaw plate axis.

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