CN108049802B - A new torque output structure for hydraulic rock drill - Google Patents

Abstract

The invention discloses a novel torque output structure for a hydraulic rock drill, comprising a drill rod, a hexagonal hole shaft coaxially mounted on the drill rod, a front body coaxially mounted near the end of the hexagonal hole shaft, and a hexagonal sleeve convenient for replacement arranged in the front body near the end of the hexagonal hole shaft. The invention makes the maintenance and replacement of the invention more convenient by arranging the hexagonal sleeve convenient for replacement, which not only reduces the workload during maintenance, saves maintenance time, but also reduces the volume of parts to be replaced, saves more than 75% of materials, and reduces the user's use cost by 80%.

Description

A new torque output structure for hydraulic rock drill

Technical Field

The invention belongs to the field of engineering machinery, and in particular relates to a novel torque output structure for a hydraulic rock drill used in mining, highway, railway, water conservancy and tunnel construction projects.

Background technique

At present, in my country's mining, high-speed rail, subway tunnel, and water conservancy construction, air-leg pneumatic rock drills are widely used, with an annual demand of more than 100,000 units and more than 350,000 employees. The advantages of pneumatic rock drills are: simple structure, low price, not very strict sealing requirements, and low professional maintenance. The disadvantages are low energy utilization, large vibration, high noise, and oil and gas pollution, which threaten the physical and mental health of miners.

The hydraulic rock drill is an energy-saving and environment-friendly rock drill. Its characteristics are: fast rock drilling speed, low noise, no oil mist pollution, small vibration and energy saving.

The working principle of the water rock drill is: using high-pressure water as the power, the piston is controlled to reciprocate through the flow control valve. During the stroke, the piston impacts the drill rod and the drill bit to break the rock; when the independent rotary mechanism or the piston returns, the drill rod and the drill bit are driven to rotate a certain angle. Continuous impact and rotation make the drill rod and the drill bit drill a circular blasthole on the rock. The torque output part that drives the drill rod and the drill bit to rotate is the hexagonal hole shaft of the hydraulic rock drill, and the hexagonal body of the drill rod is inserted into the hexagonal hole of the hexagonal hole shaft. The matching clearance between the two is relatively large, generally about 0.5mm. From many years of observation, whether it is a hydraulic rock drill or a pneumatic rock drill, the front section of the hexagonal hole that drives the drill rod to rotate (about 50mm in length) is the most likely to wear and become larger, which will cause: the rocking of the rock drill increases, and the drill tail of the drill rod is easy to break. At this time, the hexagonal hole parts have to be replaced in time.

However, it is troublesome to install and replace hexagonal hole parts, especially the hexagonal hole shaft of hydraulic rock drill. Gears are installed on it, the shaft processing accuracy is high, and keyways must be processed. The cost of hexagonal hole shaft is still relatively high. Just because the front section of the hexagonal hole shaft is worn about 50mm, the entire shaft needs to be replaced, resulting in waste of resources and inconvenience in replacement.

Summary of the invention

The technical problem to be solved by the present invention is to overcome the above-mentioned deficiencies of the prior art and provide a novel torque output structure for a hydraulic rock drill which is both cost-saving and easy to replace.

In order to solve the above problems, the present invention adopts the following technical solution: a new torque output structure for a hydraulic rock drill, including a drill rod, a hexagonal hole shaft is coaxially assembled on the drill rod, a front body is coaxially assembled near the end of the hexagonal hole shaft, and a hexagonal sleeve that is easy to replace is arranged in the front body near the end of the hexagonal hole shaft.

The following is a further optimization of the above solution by the present invention: the hexagonal sleeve is coaxially detachably assembled with one end of the hexagonal hole axis.

Further optimization: a plurality of holes on the hexagonal sleeve are arranged in a circular array on one end surface of the hexagonal sleeve close to the hexagonal hole axis.

Further optimization: a plurality of holes on the hexagonal hole shaft are arranged in an annular array on one end surface of the hexagonal hole shaft close to the hexagonal sleeve and are respectively used in conjunction with the holes on the hexagonal sleeve.

Further optimization: the hole on the hexagonal hole shaft is connected to the hole on the corresponding hexagonal sleeve through a cylindrical pin.

Further optimization: the length of the hexagonal sleeve along its own axis is 45-60 mm.

When in use, the rotation of the gear drives the hexagonal hole shaft to rotate through the flat key, and the hexagonal hole shaft drives the hexagonal sleeve to rotate through the cylindrical pin, thereby driving the drill rod and the drill bit at the head of the drill rod to rotate, thereby drilling a hole. When the hexagonal hole of the hexagonal sleeve is worn out, the hole installed on the front body is removed with an elastic retaining ring, and the hexagonal sleeve can be removed from the hexagonal hole shaft and replaced.

The invention makes the maintenance and replacement of the invention more convenient by providing an easily replaceable hexagonal sleeve, which not only reduces the workload during maintenance and saves maintenance time, but also reduces the volume of parts that need to be replaced, saves more than 75% of materials, and reduces the user's use cost by 80%.

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the structure of an embodiment of the present invention;

FIG2 is a schematic diagram of the structure of a hexagonal sleeve in an embodiment of the present invention;

FIG. 3 is a side view of FIG. 2 .

In the figure: 1-front body; 2-cylindrical pin; 3-transition plate; 4-gear sleeve; 5-gear; 6-first bearing; 7-flat key; 8-second bearing; 9-hexagonal hole shaft; 10-hexagonal sleeve; 11-elastic retaining ring for hole; 12-hexagon socket bolt; 13-elastic retaining ring for shaft; 14-drill rod; A-hole on the hexagonal sleeve; B-hole on the hexagonal hole shaft.

Detailed ways

Embodiment, as shown in Figures 1 to 3, a new type of torque output structure for a hydraulic rock drill includes a drill rod 14, on which a hexagonal hole shaft 9 is coaxially mounted, a front body 1 is coaxially mounted near the end of the hexagonal hole shaft 9, and a hexagonal sleeve 10 that is easy to replace is provided in the front body 1 near the end of the hexagonal hole shaft 9.

The hexagonal sleeve 10 is coaxially detachably assembled with one end of the hexagonal hole shaft 9, and a hexagonal hole capable of accommodating the drill rod 14 is provided in the hexagonal sleeve 10. Such a design is convenient for replacement and saves costs.

The length of the hexagonal sleeve 10 along its own axis is 45-60 mm. Such a design is more conducive to saving materials and costs and reducing unnecessary waste.

A plurality of holes A on the hexagonal sleeve 10 are arranged in an annular array on one end surface close to the hexagonal hole axis 9 .

On one end surface of the hexagonal hole shaft 9 close to the hexagonal sleeve 10, there are a plurality of holes B on the hexagonal hole shaft in an annular array, which are respectively used in conjunction with the holes A on the hexagonal sleeve.

The hole B on the hexagonal hole shaft is connected to the hole A on the corresponding hexagonal sleeve by a cylindrical pin 2, and the cylindrical pin 2 is transitionally matched with the hole B on the hexagonal hole shaft and the hole A on the corresponding hexagonal sleeve respectively. This design is convenient for assembly and reduces the assembly volume.

A hole elastic retaining ring 11 is arranged near one end of the hexagonal sleeve 10 in the front body 1 to prevent the hexagonal sleeve 10 from axial movement.

A transition plate 3 is coaxially mounted on the hexagonal hole shaft 9 near one end of the front body 1 , and the transition plate 3 and the front body 1 are detachably assembled via a plurality of hexagon socket head bolts 12 .

The hexagonal hole shaft 9 is rotatably connected to the transition plate 3 via the second bearing 8 , one end of the transition plate 3 is also connected to the gear sleeve 4 via a hexagon socket bolt, and the gear sleeve 4 is rotatably connected to the hexagonal hole shaft 9 via the first bearing 6 .

The hexagonal hole shaft 9 is coaxially assembled with a gear 5 via a flat key 7 , and the gear 5 is located in the gear sleeve 4 .

A shaft elastic circlip 13 is provided on the hexagonal shaft 9 near one end of the gear 5 , and the shaft elastic circlip 13 is used to limit the axial movement of the gear 5 .

When in use, the gear 5 rotates through the flat key 7 to drive the hexagonal hole shaft 9 to rotate, and the hexagonal hole shaft 9 drives the hexagonal sleeve 10 to rotate through the cylindrical pin 2, thereby driving the drill rod 14 and the drill bit at the head of the drill rod to rotate, thereby drilling a hole. When the hexagonal hole of the hexagonal sleeve 10 is worn out, the hole elastic retaining ring 11 installed on the precursor 1 is removed, and the hexagonal sleeve 10 can be removed from the hexagonal hole shaft 9 and replaced.

The invention makes the maintenance and replacement of the invention more convenient by providing an easily replaceable hexagonal sleeve, which not only reduces the workload during maintenance and saves maintenance time, but also reduces the volume of parts that need to be replaced, saves more than 75% of materials, and reduces the user's use cost by 80%.

Claims (1)

1. The utility model provides a novel torque output structure for hydraulic rock drill, includes drill rod (14), coaxial being equipped with hexagonal hole axle (9) on drill rod (14), the coaxial precursor (1) that is equipped with in the position that is close to the tip on hexagonal hole axle (9), its characterized in that: a hexagonal sleeve (10) which is convenient to replace is arranged in the precursor (1) and is close to the end part of the hexagonal hole shaft (9);

the hexagonal sleeve (10) is coaxially and detachably assembled with one end of the hexagonal hole shaft (9);

a hexagonal hole capable of accommodating the drill rod (14) is formed in the hexagonal sleeve (10);

The length of the hexagonal sleeve (10) along the axis of the hexagonal sleeve is 45-60mm;

A plurality of holes (A) on the hexagonal sleeve are annularly arranged on one end face, close to the hexagonal hole shaft (9), of the hexagonal sleeve (10);

a plurality of holes (B) on the hexagonal hole shaft which are respectively matched with the holes (A) on the hexagonal sleeve are annularly arranged on one end face, close to the hexagonal sleeve (10), of the hexagonal hole shaft (9);

the holes (B) on the hexagonal hole shafts are connected with the corresponding holes (A) on the hexagonal sleeves through cylindrical pins (2); the cylindrical pin (2) is respectively in transition fit with the hole (B) on the hexagonal hole shaft and the corresponding hole (A) on the hexagonal sleeve;

A hole elastic retainer ring (11) for preventing the hexagonal sleeve (10) from axially moving is arranged at a position, close to one end of the hexagonal sleeve (10), in the precursor (1);

A transition disc (3) is coaxially arranged on the hexagonal hole shaft (9) at a position close to one end of the precursor (1), and the transition disc (3) and the precursor (1) are detachably assembled;

the hexagonal hole shaft (9) is rotationally connected with the transition disc (3) through a second bearing (8), one end of the transition disc (3) is also connected with the gear sleeve (4) through an inner hexagon bolt, and the gear sleeve (4) is rotationally connected with the hexagonal hole shaft (9) through a first bearing (6);

The hexagonal hole shaft (9) is coaxially provided with a gear (5) through a flat key (7), and the gear (5) is positioned in the gear sleeve (4);

and an elastic check ring (13) for the shaft is arranged at a position, close to one end of the gear (5), on the hexagonal hole shaft (9), and the elastic check ring (13) for the shaft is used for limiting the axial movement of the gear (5).