CN213510500U

CN213510500U - Drill rod clamping structure applied to through hole type power head

Info

Publication number: CN213510500U
Application number: CN202021041101.0U
Authority: CN
Inventors: 顾建戴; 卞文建; 张成玉; 朱蓉洁
Original assignee: Jiangsu Wuxi Mineral Exploration Machinery General Factory Co Ltd
Current assignee: Jiangsu Wuxi Mineral Exploration Machinery General Factory Co Ltd
Priority date: 2020-06-08
Filing date: 2020-06-08
Publication date: 2021-06-22
Anticipated expiration: 2030-06-08

Abstract

The utility model relates to a be applied to drilling rod clamping structure of through hole formula unit head, including the gear box, gear box input installation hydraulic motor, gear box output installation main shaft, main shaft radial slip sets up the slips, the main shaft side sets up the hydro-cylinder, hydro-cylinder piston end connecting axle bearing frame side, install the bearing in the bearing frame, bearing inner race is hugged closely the bearing frame hole, install the revolving axle in the bearing inner race, revolving axle sub-unit connection slip seat upper portion, the revolving axle cover is located the main shaft periphery. The utility model discloses, simple structure makes the slips clamp force invariable, and the slips presss from both sides tightly to loosen the stroke bigger, and the slips presss from both sides tightly to loosen two-way controllable.

Description

Drill rod clamping structure applied to through hole type power head

Technical Field

The utility model belongs to the technical field of engineering machine tool's rig, a drilling rod clamping structure who is applied to through-hole formula unit head is related to.

Background

The core component of the power head type engineering exploration construction drilling machine has the main functions of transmitting rotation and feed lifting motion to the drilling tool, enabling the drilling tool to have required torque, rotating speed and feed lifting speed, cutting and impacting stratum and achieving the drilling function of the drilling tool. The through-hole power head generally clamps the drill stem through the slips, so that the drill stem and the power head are fixed. At present, the clamping of slips has two modes: the first is single-acting oil cylinder, disc spring, grooved slip seat and slip, and the second is double-acting oil cylinder, conic slip seat and slip. The first clamping mode is that a disc spring provides thrust to push a slip seat to move axially along a main shaft of a power head, and slips are pushed to radially contract towards the main shaft through an inclined plane of the slip seat so that the slips clamp a drill rod in the main shaft. The single-acting oil cylinder pushes the slip seat to move reversely, so that the slip is radially expanded towards the main shaft, and a drill rod in the main shaft is loosened. The second clamping mode is that a piston rod of a double-acting oil cylinder is recycled to generate thrust to push a conical slip seat to move axially along a main shaft of the power head, and slips are pushed to radially shrink towards the main shaft through the conical surface of the slip seat so as to enable the slips to clamp a drill rod in the main shaft.

In the first clamping mode, the slip clamping force depends on the elasticity of the disc spring, and the slip clamping and releasing stroke depends on the compressible amount of the disc spring. Since the elastic force of the disc spring varies with different compression amounts, the clamping force of the clamping method is not constant, and the clamping force is likely to be too large or too small due to the variation of the compression amount. And due to the structure of the disc spring, the clamping stroke of the slip is small.

In the second chapter of clamping mode, the clamping force of the slips depends on the pulling force of the oil cylinder, and the clamping stroke of the slips depends on the stroke of the oil cylinder. Because the pulling force of the oil cylinder is constant, and the required clamping and loosening stroke of the slips can be obtained by changing the stroke of the oil cylinder. However, in the structure, the conical slip seat and the main shaft of the gyrator are not radially constrained, so that a drill rod clamped by the slip is eccentric in the main shaft, the drill rod can be caused to jump radially, and the drilling of the drill rod is not facilitated. And the conical slip seat can only push the slips to radially contract towards the main shaft, and can not push the slips to radially expand towards the main shaft, namely the conical slip seat can only drive the slips to do unidirectional motion radially contracting towards the main shaft, so that the loosening of the slips is not facilitated, and the slips can easily fall into the main shaft of the through hole type gyrator.

Disclosure of Invention

An object of the utility model is to provide a be applied to drilling rod clamping structure of through hole formula unit head can solve foretell problem.

According to the utility model provides a technical scheme: the utility model provides a be applied to drilling rod clamping structure of through-hole formula unit head, includes the gear box, gear box input installation hydraulic motor, gear box output installation main shaft, the main shaft radial slip sets up the slips, the main shaft side sets up the hydro-cylinder, hydro-cylinder piston end connecting axle bearing frame side, install the bearing in the bearing frame, the bearing inner race is hugged closely the bearing frame hole, install the revolving axle in the bearing inner race, revolving axle sub-unit connection slips seat upper portion, the revolving axle cover is located the main shaft periphery.

As a further improvement of the utility model, the slips is 120 evenly distributed, the slips outside is adduction inclined plane.

As a further improvement, the bearing frame includes the bearing frame, both ends installation gland about the bearing frame, bearing frame internally mounted the bearing, the hydro-cylinder piston end is connected the bearing frame side, the bearing inner race is hugged closely the bearing frame hole.

As a further improvement of the utility model, the inner periphery of the slip seat is provided with a driving inclined plane.

As a further improvement, the wear pad is connected outside the slips, the wear pad outside sets up the wear pad inclined plane.

As a further improvement, the slip seat is outwards to interior division has wear pad groove and slip groove, the wear pad slide set up in the wear pad groove, the slips slide set up in the slip groove, wear pad width in the slips.

As a further improvement of the utility model, the lower part of the revolving shaft is connected with the upper part of the slip seat through a revolving shaft bolt.

The utility model discloses an actively advance the effect and lie in:

the utility model discloses, simple structure makes the slips clamp force invariable, and the slips presss from both sides tightly to loosen the stroke bigger, and the slips presss from both sides tightly to loosen two-way controllable.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a side view of fig. 1.

Fig. 3 is a sectional view taken along the line a-a in fig. 2.

Detailed Description

The following description will further describe embodiments of the present invention with reference to the accompanying drawings.

In fig. 1-3, the device comprises a gear box 1, a main shaft 2, a hydraulic motor 3, a slip 4, a wear pad 5, a gland 6, a bearing 7, a rotating shaft 8, a bearing frame 9, a slip seat 10, a pin 11, an oil cylinder 12, an oil cylinder bolt 13, a wear pad screw 14, a rotating shaft bolt 15, a screw 16 and the like.

As shown in fig. 1, the utility model relates to a be applied to drilling rod clamping structure of through-hole formula unit head, including gear box 1, hydraulic motor 3 is installed to gear box 1 input, provides input torque and rotational speed to gear box 1. The output end of the gear box 1 is provided with a main shaft 2, and the gear box 1 transmits output torque and rotating speed to the main shaft 2 through internal gear change. So that the main shaft 2 has certain torque and rotation speed. The main shaft 2 is a hollow shaft, a drill rod can move up and down in an inner hole of the main shaft 2, slips 4 are arranged on the main shaft 2 in a radial sliding mode, the slips 4 are evenly distributed at 120 degrees, and an inward-contracting inclined plane is arranged outside the slips 4.

As shown in FIG. 2, oil cylinders 12 are arranged on two sides of the main shaft 2, the fixed end of each oil cylinder 12 is fixed on the box body 1 through an oil cylinder bolt 13, and the piston end of each oil cylinder 12 is hinged with the side surface of the bearing seat through a pin 11. A bearing 7 is arranged in the bearing seat, the outer ring of the bearing 7 is tightly attached to the inner hole of the bearing seat, a rotating shaft 8 is arranged in the inner ring of the bearing 7, and the rotating shaft 8 can freely rotate along the same axis with the bearing frame 9 and can bidirectionally slide along the axial direction of the main shaft 2 along with the bearing frame 9.

The bearing frame includes bearing frame 9, and there is gland 6 at bearing frame 9 both ends, and bearing frame 9 internally mounted bearing 7, 12 piston ends of hydro-cylinder pass through round pin 11 and connect the side of bearing frame 9. The outer ring of the bearing 7 is tightly attached to the inner hole of the bearing frame 9.

The lower part of the rotating shaft 8 is connected with the upper part of the slip seat 10 through a rotating shaft bolt 15. The rotating shaft 8 is of a hollow structure and is sleeved on the periphery of the main shaft 2, and the inner periphery of the slip seat 10 is provided with a driving inclined plane.

In order to prolong the service time of the slips 4, a wear pad 5 is fixedly connected to the outer side of the slips 4 through a wear pad screw 14, and a wear pad inclined surface is arranged on the outer side of the wear pad 5.

As shown in fig. 3, the slip bowl 10 is provided with a wear pad groove and a slip groove from outside to inside in the radial direction, the wear pad 5 is adapted to the width of the wear pad groove, the slip 4 is adapted to the width of the slip groove, the wear pad 5 is slidably disposed in the wear pad groove, one part of the slip 4 is slidably disposed in the slip groove, the other part is slidably disposed in the main shaft 2, the width of the wear pad 5 is slightly wider than the slip 4, and excessive retraction of the slip 4 is prevented.

The working process of the utility model is as follows:

when a drill rod needs to be clamped, the oil cylinder 12 is recovered, the piston end of the oil cylinder 12 sequentially passes through the bearing seat, the bearing 7 and the rotating shaft 8 to drive the slip seat 10 to move downwards, the inclined surface of the inner periphery of the slip seat 10 is driven to abut against the inclined surface of the wear pad on the outer side of the wear pad 5, so that the slip 4 is radially retracted along the main shaft 2 to clamp the drill rod.

When the drill rod needs to be loosened, the oil cylinder 12 extends out, the piston end of the oil cylinder 12 drives the slip seat 10 to move upwards sequentially through the bearing seat, the bearing 7 and the rotating shaft 8, the radial thrust is received by the slip 4, and the drill rod can freely move along the axial direction of the main shaft 2.

The foregoing description is illustrative of the present invention and is not to be construed as limiting thereof, as the invention may be modified in any manner without departing from the spirit thereof.

Claims

1. The utility model provides a be applied to drilling rod clamping structure of through-hole formula unit head which characterized in that: the structure includes gear box (1), gear box (1) input installation hydraulic motor (3), gear box (1) output installation main shaft (2), main shaft (2) radial slip sets up slips (4), main shaft (2) side sets up hydro-cylinder (12), hydro-cylinder (12) piston end connection bearing frame side, installation bearing (7) in the bearing frame, bearing (7) outer lane is hugged closely the bearing frame hole, installation revolving axle (8) in bearing (7) inner circle, revolving axle (8) sub-unit connection slip seat (10) upper portion, revolving axle (8) cover is located main shaft (2) periphery.

2. The drill rod clamping arrangement for a through-bore power head of claim 1, wherein: the slips (4) are uniformly distributed at 120 degrees, and an inward-contracting inclined plane is arranged outside the slips (4).

3. The drill rod clamping arrangement for a through-bore power head of claim 1, wherein: the bearing block comprises a bearing frame (9), glands (6) are installed at the upper end and the lower end of the bearing frame (9), the bearing frame (9) is internally installed with the bearing (7), the piston end of the oil cylinder (12) is connected with the side face of the bearing frame (9), and the outer ring of the bearing (7) is tightly attached to the inner hole of the bearing frame (9).

4. The drill rod clamping arrangement for a through-bore power head of claim 1, wherein: the inner periphery of the slip seat (10) is provided with a driving inclined plane.

5. The drill rod clamping arrangement for a through-bore power head of claim 1, wherein: the outer side of the slip (4) is connected with a wear-resistant pad (5), and the outer side of the wear-resistant pad (5) is provided with a wear-resistant pad inclined plane.

6. The drill rod clamping arrangement as recited in claim 5, wherein: the slip seat (10) is radially outward to the interior wear pad groove and slip groove of having opened, wear pad (5) slide set up in the wear pad groove, slips (4) slide set up in the slip groove, wear pad (5) width is wider than slips (4).

7. The drill rod clamping arrangement for a through-bore power head of claim 1, wherein: the lower part of the rotating shaft (8) is connected with the upper part of the slip seat (10) through a rotating shaft bolt (15).