CN216768028U

CN216768028U - Pin shaft fastening device suitable for connecting rotary drilling rig power head and pressurizing oil cylinder

Info

Publication number: CN216768028U
Application number: CN202220212764.7U
Authority: CN
Inventors: 吴宛生; 汤炜; 杨伟岗; 郑逢良; 朱帅棋; 张森林; 孔梦凡; 吕广飞; 朱伟东; 李伟东; 张建昌; 张鹏
Original assignee: Yutong Heavy Equipment Co ltd
Current assignee: Yutong Heavy Equipment Co ltd
Priority date: 2022-01-26
Filing date: 2022-01-26
Publication date: 2022-06-17
Anticipated expiration: 2032-01-26

Abstract

A pin shaft fastening device suitable for connecting a rotary drilling rig power head and a pressurizing oil cylinder comprises a pin shaft which is arranged in a shaft hole of a support lug plate on the power head consisting of a left lug plate and a right lug plate in a penetrating mode, a shaft shoulder at the tail end of the pin shaft is provided with a cutting plane matched with an upper plane of a stop block fixedly connected with the lower portion of the shaft hole of the right lug plate and used for preventing the pin shaft from rotating, the front end of the pin shaft extending out of the left lug plate is provided with an annular groove used for clamping a clamping plate and an axial rectangular groove, the front end of the axial rectangular groove is communicated with the annular groove and extends towards the rear of the annular groove, and the rectangular groove is a clamping groove with an opening right above; the lower opening type opening of the clamping plate and the rectangular boss which is positioned right above the rear vertical surface of the clamping plate and extends horizontally and backwards are respectively matched with the annular groove and the rectangular groove which are processed on the pin shaft, so that the clamping plate cannot rotate along the circumference of the pin shaft; the pin shaft cylindrical surface between the clamping plate and the left ear plate is sleeved with a spacer bush with an open ring structure in a movable fit mode.

Description

Pin shaft fastening device suitable for connecting rotary drilling rig power head and pressurizing oil cylinder

Technical Field

The utility model belongs to the field of design of rotary drilling rigs of engineering machinery, and particularly relates to a pin shaft fastening device suitable for connecting a power head of a rotary drilling rig and a pressurizing oil cylinder.

Background

At present, a power head of a rotary drilling rig and a pressurizing oil cylinder connecting pin shaft are fixed by a clamping plate and a bolt, a cotter pin and a slotted nut. The small-sized machine has small shaft diameter and is reliable by using the slotted nut. The large machine type generally adopts the mode of cotter pin fixing and clamping plate bolt fixing, and the slotted nut needs to be customized after the shaft diameter is increased. However, the large machine type has large vibration of beating hard rock, so that the horizontal direction stress of the pin shaft is large, the cotter pin is easy to be cut off, and a major accident that the pin shaft exits from the power head and falls off is caused. The fixed mode atress of cardboard plus split pin is good a little, but the operational environment of unit head department can be very moist when the hole that wets is collided with soil, and the bolt is the corrosion very easily, leads to dismantling the difficulty, often can destroy the screw hole. And the shaft at the position is disassembled frequently, so that the clamping plate structure is inconvenient. Therefore, no screw connection is preferred here.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide the pin shaft fastening device which does not use thread fastening and can bear larger axial force and is suitable for connecting the rotary drilling rig power head and the pressurizing oil cylinder aiming at the defects in the prior art.

The object of the utility model can be achieved by the following technical measures:

the utility model relates to a pin shaft fastening device suitable for connecting a rotary drilling rig power head and a pressurizing oil cylinder, which comprises a pin shaft penetrating in a support lug plate shaft hole on the power head consisting of a left lug plate and a right lug plate, wherein a shaft shoulder at the tail end of the pin shaft is provided with a cutting plane matched with the upper plane of a stop block fixedly connected with the lower part of the right lug plate shaft hole and used for preventing the pin shaft from rotating, the front end of the pin shaft extending out of the left lug plate is provided with an annular groove used for clamping a clamping plate and an axial rectangular groove, the front end of the axial rectangular groove is communicated with the annular groove and extends towards the rear of the annular groove, and the rectangular groove is a clamping groove with an opening right above; the lower opening type opening of the clamping plate and the rectangular boss which is positioned right above the rear vertical surface of the clamping plate and extends horizontally and backwards are respectively matched with the annular groove and the rectangular groove which are processed by the pin shaft, so that the clamping plate can not rotate along the circumference of the pin shaft; a spacer bush with a split ring structure is sleeved on the cylindrical surface of the pin shaft between the clamping plate and the left ear plate in a movable fit manner

The spacer bush is in an omega-shaped structure.

The utility model has the following beneficial effects:

the pin shaft fastening device not only solves the problem of difficulty in dismounting caused by easy corrosion due to the fact that bolts are used for fastening, but also can bear larger axial force. Specifically speaking:

(1) the operation is simple, the bolt does not need to be screwed or the split pin does not need to be broken off, and the spacer sleeve only needs to be rotated, so that the requirement of frequent disassembly is met.

(2) Avoid using threaded connection, the corrosion influence is less than the screw thread, satisfies humid environment's demand.

(3) The thickness of the clamping plate and the width of the matched annular groove can be adjusted as required, and the requirement for increasing the axial force of a large machine type is met.

Drawings

FIG. 1 is a block diagram of the components of the present invention.

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

Fig. 3 is an assembly sequence diagram.

Fig. 4 is a final assembly state diagram.

Detailed Description

The utility model will be described in conjunction with the following examples

The pin shaft fastening device suitable for connecting the rotary drilling rig power head and the pressurizing oil cylinder comprises a pin shaft 3 which is arranged in a shaft hole of a support lug plate 4 on the power head consisting of a left lug plate and a right lug plate in a penetrating mode, a cutting plane matched with the upper plane of a stop block 5 fixedly connected with the lower portion of the shaft hole of the right lug plate and used for preventing the pin shaft from rotating is processed on a shaft shoulder at the tail end of the pin shaft 3, an annular groove used for clamping a clamping plate 2 and an axial rectangular groove with the front end communicated with the annular groove and extending towards the rear of the annular groove are processed at the front end of the pin shaft 3 extending out of the left lug plate, and the rectangular groove is a clamping groove with an opening right above; the lower opening type opening of the clamping plate 2 and the rectangular boss which is positioned right above the rear vertical surface of the clamping plate and extends horizontally and backwards are respectively matched with the annular groove and the rectangular groove which are processed on the pin shaft 3, so that the clamping plate 2 is ensured not to rotate along the circumference of the pin shaft 3; the spacing sleeve 1 with an open ring structure is sleeved on the cylindrical surface of the pin shaft between the clamping plate 2 and the left ear plate in a movable fit mode.

The spacer bush 1 is in an omega-shaped structure.

More specifically: the round pin axle 3 is last to have seted up ring channel and rectangular channel, can guarantee under the effect of dog 5 that the rectangular channel of round pin axle 3 is up all the time, and dog 5 welds the right side otic placode shaft hole below of support otic placode 4 on the unit head.

Before installing cardboard 2, overlap axial direction with spacer 1 from the axle head of round pin axle 3 if, stick to the otic placode, it guarantees that the breach is up (keeping the open position of spacer promptly to be in the rectangular channel position department of processing out on round pin axle 3), later from last down installation cardboard 2, the breach along spacer 1 makes the rectangle boss that the level that lies in directly over the facade behind the cardboard extends backward reach the rectangular channel of round pin axle 3 in, it makes its breach down to wait to rotate spacer 1 after the cardboard 2 installation finishes, press on the rectangle boss that the level of cardboard 2 extends backward, restriction cardboard 2 upward movement leads to droing from round pin axle 3, reach the state of figure 4. And the spacer bush 1 can only rotate along the circumference of the pin shaft 3 after being assembled, and the axial movement can be limited by the left lug plate and the clamping plate 2. The gap of the spacer bush 1 can not automatically rotate to the top under the action of gravity, and the clamping plate 2 is prevented from falling off due to vibration. When the clamping plate 2 is disassembled, the clamping plate can be taken down only by manually rotating the gap of the spacer sleeve 1 to the top (as shown in figure 3).

When the shaft is subjected to axial force, the annular groove transmits the force to the clamping plate 2, the clamping plate is transmitted to the spacer bush 1, and the spacer bush is transmitted to the lug plate 4, so that the pin shaft 3 is limited to exit from the shaft hole.

Claims

1. The utility model provides a round pin axle fastener suitable for connect and dig rig unit head soon and add hydro-cylinder, its characterized in that: the power head comprises a pin shaft (3) which is arranged in a shaft hole of a support lug plate (4) on a power head consisting of a left lug plate and a right lug plate in a penetrating manner, a shaft shoulder at the tail end of the pin shaft (3) is provided with a cutting plane matched with an upper plane of a stop block (5) which is fixedly connected with the lower part of the shaft hole of the right lug plate and used for preventing the pin shaft from rotating, the front end of the pin shaft (3) extending out of the left lug plate is provided with an annular groove used for clamping a clamping plate (2) and an axial rectangular groove, the front end of the axial rectangular groove is communicated with the annular groove and extends towards the rear part of the annular groove, and the rectangular groove is a clamping groove with an opening right above; the lower opening type opening of the clamping plate (2) and the rectangular boss which is positioned right above the rear vertical surface of the clamping plate and extends horizontally and backwards are respectively matched with the annular groove and the rectangular groove which are processed on the pin shaft (3), so that the clamping plate (2) cannot rotate along the circumference of the pin shaft (3); a spacer bush (1) with an open ring structure is sleeved on the pin shaft cylindrical surface between the clamping plate (2) and the left ear plate in a movable fit manner.

2. The pin shaft fastening device suitable for connecting the rotary drilling rig power head and the pressurizing oil cylinder according to claim 1, characterized in that: the spacer bush (1) is in an omega-shaped structure.