CN212743860U

CN212743860U - Hydraulic breaking hammer drill rod mechanism

Info

Publication number: CN212743860U
Application number: CN202021613806.5U
Authority: CN
Inventors: 刘�东; 李永政
Original assignee: Yantai Chengtai Construction Machinery Co ltd
Current assignee: Yantai Chengtai Construction Machinery Co ltd
Priority date: 2020-08-05
Filing date: 2020-08-05
Publication date: 2021-03-19
Anticipated expiration: 2030-08-05

Abstract

A hydraulic breaking hammer drill rod mechanism is characterized in that a rear cylinder body is arranged at the top of a front cylinder body, an I-shaped fixing part is formed at the upper end of the front cylinder body, and a fixing space is formed at the fixing part; the through bolt is inserted into the fixing space of the front cylinder body from the rear cylinder body; the tail end of the through bolt is connected with a fixing nut, and a gap between the fixing nut and the top end of the fixing part is filled with a gasket assembly; the crushing drill rod is inserted into and fixed at the bottom of the front cylinder body; the gasket subassembly includes sub-pad and female pad, contacts through the curved surface between sub-pad and the female pad. According to the technical scheme, parallelism of two end faces of the rear cylinder body does not need to be considered, bending degree of the through bolt does not need to be considered, perpendicularity of the cross section of the threads and the axis of the through bolt does not need to be ensured, radial acting force of the bolt is effectively eliminated based on the gasket assembly, fracture and looseness of the through bolt in work are effectively avoided, transverse stress of the broken drill rod is reduced, fracture probability of the broken drill rod is greatly reduced, stability of the hydraulic breaking hammer is guaranteed, and work efficiency is improved.

Description

Hydraulic breaking hammer drill rod mechanism

Technical Field

The utility model relates to a hydraulic breaking hammer drill rod mechanism belongs to the broken technical field of hydraulic pressure.

Background

The breaking hammer is also called a hydraulic pick, and the power source of the breaking hammer is pressure oil provided by a pump station of an excavator or a loader. With the rapid development of the hydraulic breaking hammer market, domestic hydraulic breaking hammer enterprises rise rapidly.

In the hydraulic breaking hammer drill rod stress characteristic rock drilling process, the drill rod bears 2000-3000 times of high-frequency impact of a rock drill piston, rock is broken under the combined action of the rotation of the breaking hammer and the thrust of a propeller, and the main stress is as follows: axial alternating compressive stress and tensile stress generated by impact longitudinal waves of a breaking hammer piston; bending stress generated by eccentric impact of a piston of the breaking hammer; when the breaking hammer rotates, a drill rod transmits torque and torsional stress induced by factors such as clamping drill rods during rock drilling; the drill rod bears the friction force of rocks on the inner wall of the blast hole in the drilling process; other additional shock and impact loads from the drilling process.

Because the rear end face of the rear cylinder body has no fine processing procedure, the heat treatment deformation is inevitable, and the parallelism of the two end faces is uncontrollable. The through bolt belongs to a slender part, the bending degree is about 0.3mm in national standard, and if the machining precision is required to be increased, the cost is too high, and the market competitiveness is not realized. In addition, the thread belongs to rolled threads, and the perpendicularity of the cross section of the thread and the axis of the bolt cannot be ensured under the existing conditions, so that the drill rod and the front cylinder body continuously generate transverse acting force in the striking process of the breaking hammer, and then the drill rod is broken, and the stability and the working efficiency of the breaking hammer are influenced.

SUMMERY OF THE UTILITY MODEL

Therefore, the utility model provides a hydraulic pressure quartering hammer drill rod mechanism can eliminate the radial effort of bolt, need not to consider back cylinder body both ends face depth of parallelism problem, need not to ensure the straightness that hangs down of the cross section of screw thread and bolt axis.

In order to achieve the above object, the present invention provides the following technical solutions: a hydraulic breaking hammer drill rod mechanism comprises a rear cylinder body, a front cylinder body, a through bolt, a fixing nut, a gasket assembly and a breaking drill rod; the rear cylinder body is arranged at the top of the front cylinder body, an I-shaped fixing part is formed at the upper end of the front cylinder body, and a fixing space is formed at the fixing part; the through bolt is inserted into the fixing space of the front cylinder body from the rear cylinder body; the tail end of the through bolt is connected with the fixing nut, and the gasket assembly is filled in a gap between the fixing nut and the top end of the fixing part; the crushing drill rod is inserted into and fixed at the bottom of the front cylinder body;

the gasket subassembly includes sub-pad and female pad, through the curved surface contact between sub-pad and the female pad.

As a preferable mode of the hydraulic breaker drill rod mechanism, the number of the through bolts is four, and the four through bolts are inserted into the fixing space from the corner portions of the front cylinder body, respectively.

As a preferable scheme of the hydraulic breaking hammer drill rod mechanism, four adjacent fixing spaces are formed in the fixing part, and an adjusting gap is reserved between the tail end of the through bolt and the bottom surface of each fixing space.

As a preferable scheme of the hydraulic breaking hammer drill rod mechanism, the curved surface contacted between the sub-pad and the main pad is corrugated.

As a preferred scheme of the hydraulic breaking hammer drill rod mechanism, a curved surface contacted between the sub-pad and the main pad is in a cone shape, the lower end of the sub-pad is protruded, and the upper end of the main pad is sunken to be matched with the protrusion.

The rear cylinder body of the utility model is arranged on the top of the front cylinder body, the upper end of the front cylinder body is provided with an I-shaped fixed part, and the fixed part is provided with a fixed space; the through bolt is inserted into the fixing space of the front cylinder body from the rear cylinder body; the tail end of the through bolt is connected with a fixing nut, and a gap between the fixing nut and the top end of the fixing part is filled with a gasket assembly; the crushing drill rod is inserted into and fixed at the bottom of the front cylinder body; the gasket subassembly includes sub-pad and female pad, contacts through the curved surface between sub-pad and the female pad. According to the technical scheme, parallelism of two end faces of the rear cylinder body does not need to be considered, bending degree of the through bolt does not need to be considered, perpendicularity of the cross section of the threads and the axis of the through bolt does not need to be ensured, radial acting force of the bolt is effectively eliminated based on the gasket assembly, fracture and looseness of the through bolt in work are effectively avoided, transverse stress of the broken drill rod is reduced, fracture probability of the broken drill rod is greatly reduced, stability of the hydraulic breaking hammer is guaranteed, and work efficiency is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.

The structure, ratio, size and the like shown in the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by people familiar with the technology, and are not used for limiting the limit conditions which can be implemented by the present invention, so that the present invention has no technical essential significance, and any structure modification, ratio relationship change or size adjustment should still fall within the scope which can be covered by the technical content disclosed by the present invention without affecting the efficacy and the achievable purpose of the present invention.

Fig. 1 is a schematic perspective view of a drill rod mechanism of a hydraulic breaking hammer provided in the present invention;

fig. 2 is a schematic diagram illustrating the cooperation of a gasket assembly, a through bolt and a fixing nut in a drill rod mechanism of a hydraulic breaking hammer provided in the present invention;

fig. 3 is a schematic sectional view of a gasket assembly in a drill rod mechanism of a hydraulic breaking hammer provided in the present invention.

In the figure: 1. a rear cylinder body; 2. a front cylinder body; 3. a through bolt; 4. fixing a nut; 5. a gasket assembly; 6. breaking the drill rod; 7. a fixed part; 8. a fixed space; 9. a sub-pad; 10. a mother pad; 11. a curved surface.

Detailed Description

The present invention is described in terms of specific embodiments, and other advantages and benefits of the present invention will become apparent to those skilled in the art from the following disclosure. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1, 2 and 3, a hydraulic breaking hammer drill rod mechanism is provided, which comprises a rear cylinder body 1, a front cylinder body 2, a through bolt 3, a fixing nut 4, a gasket assembly 5 and a breaking drill rod 6; the rear cylinder body 1 is arranged at the top of the front cylinder body 2, an I-shaped fixing part 7 is formed at the upper end of the front cylinder body 2, and a fixing space 8 is formed at the fixing part 7; the through bolt 3 is inserted into the fixing space 8 of the front cylinder block 2 from the rear cylinder block 1; the tail end of the through bolt 3 is connected with the fixing nut 4, and the gap between the fixing nut 4 and the top end of the fixing part 7 is filled with the gasket component 5; the breaking drill rod 6 is inserted into and fixed at the bottom of the front cylinder body 2; the gasket assembly 5 comprises a sub-gasket 9 and a mother gasket 10, and the sub-gasket 9 is in contact with the mother gasket 10 through a curved surface 11.

Specifically, the number of the through bolts 3 is four, and the four through bolts 3 are inserted into the fixing space 8 from the corner portions of the front cylinder block 2, respectively. The fixing part 7 is provided with four adjacent fixing spaces 8, and an adjusting gap is reserved between the tail end of the through bolt 3 and the bottom surfaces of the fixing spaces 8. The through bolt 3 makes the rear cylinder body 1 and the front cylinder body 2 combined together, and in the operation process, the gasket assembly 5 can buffer the impact of the fixing nut 4 and the top of the fixing space 8.

Specifically, the curved surface 11 of the contact between the sub-pad 9 and the mother pad 10 is corrugated. In addition, the curved surface 11 of the contact between the sub-pad 9 and the mother pad 10 may also be designed to be conical, the lower end of the sub-pad 9 is convex, and the upper end of the mother pad 10 is concave to match the convex. When the upper and lower two sides atress of gasket subassembly 5, when the bottom surface atress of the top surface of son pad 9 and mother pad 10 promptly, if there is the error in upper and lower two sides depth of parallelism, gasket subassembly 5 will automatically regulated, converts the radial shearing force that produces into axial atress, ensures through bolt 3's screw pretension stability and atress direction, effectively avoids the fracture and the not hard up of bolt in work. Meanwhile, the transverse acting force is converted into the radial acting force, the transverse stress of the broken drill rod 6 is reduced, and the fracture probability of the broken drill rod 6 is greatly reduced.

The rear cylinder body 1 of the utility model is arranged on the top of the front cylinder body 2, an I-shaped fixing part 7 is formed at the upper end of the front cylinder body 2, and a fixing space 8 is formed at the fixing part 7; the through bolt 3 is inserted into the fixing space 8 of the front cylinder body 2 from the rear cylinder body 1; the tail end of the through bolt 3 is connected with a fixing nut 4, and a gap between the fixing nut 4 and the top end of the fixing part 7 is filled with a gasket component 5; the breaking drill rod 6 is inserted into and fixed at the bottom of the front cylinder body 2; the gasket assembly 5 comprises a sub-gasket 9 and a mother gasket 10, and the sub-gasket 9 is in contact with the mother gasket 10 through a curved surface 11. When the upper and lower two sides atress of gasket subassembly 5, when the bottom surface atress of the top surface of son pad 9 and mother pad 10 promptly, if there is the error in upper and lower two sides depth of parallelism, gasket subassembly 5 will automatically regulated, converts the radial shearing force that produces into axial atress, ensures through bolt 3's screw pretension stability and atress direction, effectively avoids the fracture and the not hard up of bolt in work. Meanwhile, the transverse acting force is converted into the radial acting force, the transverse stress of the broken drill rod 6 is reduced, and the fracture probability of the broken drill rod 6 is greatly reduced. According to the technical scheme, parallelism of two end faces of the rear cylinder body 1 does not need to be considered, bending degree of the through bolt 3 does not need to be considered, perpendicularity of the cross section of the threads and the axis of the through bolt 3 does not need to be ensured, radial acting force of the bolt is effectively eliminated based on the gasket component 5, fracture and looseness of the through bolt 3 in work are effectively avoided, transverse stress of the breaking drill rod 6 is reduced, fracture probability of the breaking drill rod 6 is greatly reduced, stability of the hydraulic breaking hammer is guaranteed, and work efficiency is improved.

Although the invention has been described in detail with respect to the general description and the specific embodiments, it will be apparent to those skilled in the art that modifications and improvements can be made based on the invention. Therefore, such modifications and improvements are intended to be within the scope of the invention as claimed.

Claims

1. A hydraulic breaking hammer drill rod mechanism is characterized by comprising a rear cylinder body (1), a front cylinder body (2), a through bolt (3), a fixing nut (4), a gasket component (5) and a breaking drill rod (6); the rear cylinder body (1) is arranged at the top of the front cylinder body (2), an I-shaped fixing part (7) is formed at the upper end of the front cylinder body (2), and a fixing space (8) is formed on the fixing part (7); the through bolt (3) is inserted into the fixing space (8) of the front cylinder (2) from the rear cylinder (1); the tail end of the through bolt (3) is connected with the fixing nut (4), and the gasket assembly (5) is filled in a gap between the fixing nut (4) and the top end of the fixing part (7); the breaking drill rod (6) is inserted into and fixed at the bottom of the front cylinder body (2);

the gasket assembly (5) comprises a sub-gasket (9) and a main gasket (10), and the sub-gasket (9) is in contact with the main gasket (10) through a curved surface (11).

2. A hydraulic breaking hammer drill rod mechanism according to claim 1, characterized in that the number of through bolts (3) is four, four through bolts (3) being inserted into the fixing space (8) from the corners of the front cylinder block (2), respectively.

3. A hydraulic breaking hammer drill rod mechanism according to claim 2, characterized in that the fixing part (7) is formed with four adjacent fixing spaces (8), the ends of the through bolts (3) leaving a regulating gap in advance with the bottom surface of the fixing spaces (8).

4. A hydraulic breaking hammer drill rod mechanism according to claim 1, characterized in that the curved surface (11) of the contact between the sub-pad (9) and the main pad (10) is corrugated.

5. A hydraulic breaker hammer drill rod mechanism according to claim 1 wherein the curved surface (11) of contact between the sub-pad (9) and the main pad (10) is tapered, the lower end of the sub-pad (9) being convex and the upper end of the main pad (10) being concave to fit the said convex.