CN206309727U - Self-locking horse head pin device - Google Patents

Abstract

The utility model provides a from locking horse head pin device, from locking horse head pin device includes: a pin body boss (1); a pin body (2); a chute (3); a cylinder chamber (4); a cone tail (5); an open slot (6); a locking link (7); a lock cylinder (8); a lock nut (9); a spring washer (10). Connected according to the structure matching relationship to form a self-locking horse head pin device. The utility model discloses adjustable pinhole and round pin body clearance, the pinhole that rises all the time rises, can avoid pinhole wearing and tearing to produce the vibration.

Description

Self-locking donkey head pin device

technical field

The utility model relates to the field of oil extraction, in particular to a component connected between a beam of an oil field pumping unit and a donkey head, that is, a self-locking donkey head pin device.

Background technique

The donkey head pin device of the pumping unit is a part used for connecting the beam and the donkey head of the beam pumping unit.

When the pumping unit is working, because the donkey head bears alternating loads, it will cause wear and tear between the beam and the donkey head connecting pin hole and the donkey head pin. The donkey's head cracked, causing a safety accident.

To sum up, the following problems exist in the prior art: the donkey head pin is easy to detach from the donkey head connection pin hole, causing safety accidents.

Utility model content

The utility model provides a self-locking donkey head pin device to solve the problem that the donkey head pin is easily detached from the connection pin holes of the donkey head and cause safety accidents.

For this reason, the utility model proposes a kind of self-locking donkey head pin device, and described self-locking donkey head pin device comprises:

Pin body;

a pin body boss connected to the top of the pin body;

An open slot is arranged on the side of the pin body and protrudes from the top of the pin body boss from bottom to top;

The lock cylinder chamber is arranged in the open groove and is located at the bottom of the open groove; the lock cylinder chamber has an inner wall located inside the open groove;

The slideway extending obliquely from top to bottom is arranged in the open groove and passes through the inner wall of the lock cylinder chamber; the slideway intersects the axis of the pin body to form an angle a, a is greater than 0 degrees and less than 45 degrees ;

A lock nut is arranged above the boss of the pin body and fastened on the top of the slot;

A lock cylinder capable of sliding along the slideway is arranged in the lock cylinder chamber and is fixedly connected with the lock nut. By tightening the locknut, the lock cylinder slides upward along the slideway, Simultaneously, the outer surface of the lock core protrudes from the opening groove radially to tighten the donkey head connecting pin hole.

Further, the open groove is a straight groove.

Further, the included angle a is 8 degrees to 12 degrees.

Further, the lock core is a lock block.

Further, the outer surface of the locking block is an arc surface.

Further, the lock cylinder is connected to the lock nut through a locking link, and the top of the locking link is provided with an external thread.

Further, the slideway is a plane.

Further, the slideway is a cylindrical surface.

Further, the diameter of the outer surface of the lock block is the same as that of the pin body.

Further, the locking link is a round bar, and the diameter of the locking link is smaller than the depth of the opening groove.

Send the lock cylinder into the lock cylinder chamber, put it into the pin hole together with the pin body, turn the lock nut clockwise, and drive the lock cylinder to move upward along the slideway, and the axial pulling force becomes a lateral thrust, so that the lock cylinder extends out of the full pin hole clearance. Therefore, the lock cylinder is always tightened to the pin hole, which can avoid vibration caused by wear of the pin hole.

The utility model has a simple and compact structure, and the required parts only need simple machining, and the cost is low, which greatly reduces the cost of installation and use of the donkey head of the pumping unit.

Description of drawings

Fig. 1 is the three-dimensional structure schematic diagram of self-locking donkey head pin device of the present utility model;

Fig. 2 is a schematic cross-sectional structure diagram of the front view direction of the self-locking donkey head pin device of the present invention.

Explanation of reference numbers:

1. Pin body boss;

2. Pin body;

3. Slideway;

4. Lock cylinder chamber;

5. Cone tail;

6. Open slot;

7. Lock the connecting rod;

8. Lock cylinder;

9. Lock nut;

10. Spring washer

detailed description

In order to have a clearer understanding of the technical features, purposes and effects of the present utility model, the utility model is now described with reference to the accompanying drawings.

As shown in Figure 1 and Figure 2, the self-locking donkey head pin device of the present utility model comprises:

The pin body 2 is, for example, cylindrical, and is used to be inserted into the connecting pin hole of the donkey head;

The pin body boss 1 connected to the top of the pin body 2 is, for example, a round platform with a diameter larger than the connecting pin hole of the donkey head, which is used to block the connecting pin hole of the donkey head (referred to as the pin hole);

The conical tail 5 (tapered tail) located at the bottom of the pin body 2 for guiding;

The opening groove 6 is arranged on the side of the pin body 2 and protrudes from the top of the pin body boss 1 from bottom to top, so as to provide a space for the lock cylinder 8 to move;

The lock cylinder chamber 4 is arranged in the open groove 6 and is located at the bottom of the open groove 6, and is used to accommodate the lock cylinder 8; the lock cylinder chamber has an inner wall positioned at the inside of the open groove 6; that is, the lock cylinder chamber Have an inner wall far away from the opening of the opening groove 6, or the lock cylinder chamber has an inner wall facing the opening of the opening groove 6, and the outside of the lock cylinder chamber 4 (close to the outer surface of the pin body 2) is transparent, that is, the outside of the lock cylinder chamber 4 is the bottom opening of the slot;

The slideway 3 extending obliquely from top to bottom is arranged in the opening groove 6 and passes through the inner wall of the lock cylinder chamber 4 (away from the outer surface of the pin body 2); the axis of the slideway 3 and the pin body 2 Intersect to form an angle a, a is greater than 0 degrees and less than 45 degrees;

A lock nut 9 is arranged above the pin body boss 1 and fastened on the top of the opening groove 6; a lock core 8 that can slide along the slideway 3 is arranged in the lock core chamber 4 and is connected with The locking nut 9 is fixedly connected, and through the tightening of the locking nut 9, the lock core 8 slides upward along the slideway 3, and at the same time, the outer surface of the lock core 8 protrudes out of the opening radially Groove 6 tightens donkey head connection pin hole.

Further, the opening groove 6 is a straight groove, which is convenient for processing and linear movement of the lock cylinder 8 .

Further, the included angle a is 8 degrees to 12 degrees, so as to obtain a suitable tension degree of the lock cylinder 8 and bear a reasonable force. The included angle a is, for example, 10 degrees, which has better tension and stress effects.

Further, the lock core 8 is a lock block for processing.

Further, the outer surface of the lock block is an arc surface, so as to cooperate with the pin hole. The inner surface of the locking block is a plane or a curved surface with the same inclination as the slideway. Further, the diameter of the outer surface of the lock block is the same as that of the pin body 2 to achieve tight fit with the pin hole.

Further, the lock core 8 is connected to the lock nut 9 through the lock connecting rod 7 to realize a strong connection, and the top of the lock connecting rod 7 is provided with an external thread so as to cooperate with the lock nut 9, For shock absorption and anti-loosening, a spring washer 10 is sheathed on the locking link 7 .

Further, the slideway 3 is a plane for clamping.

Further, the slideway 3 is a cylindrical surface or a conical surface for processing.

Further, the locking link 7 is a round bar, and the diameter of the locking link 7 is smaller than the depth of the opening groove 6 . In order to prevent the locking connecting rod 7 from protruding laterally from the opening groove 6 during the adjustment process, and wearing out with the pin hole.

The utility model can solve the problems that when the donkey head pin of the existing oil pumping unit is working, the problems of rattling, increased wear of the pin body and the pin hole, and simultaneous clang and clang sounds are emitted. After using the device of the utility model, the gap between the pin hole and the pin body can be adjusted, and the pin hole is always tightened, which can avoid vibration caused by wear of the pin hole.

The utility model has a simple and compact structure, and the required parts only need simple machining, and the cost is low, which greatly reduces the cost of installation and use of the donkey head of the pumping unit.

The above descriptions are only illustrative specific implementations of the present utility model, and are not intended to limit the scope of the present utility model. Because the components of this utility model can be combined with each other under the condition of no conflict, any equivalent changes and modifications made by any person skilled in the art without departing from the concept and principles of this utility model shall belong to this utility model. The scope of utility model protection.

Claims (10)

1. a kind of self-locking horse head pin device, it is characterised in that the self-locking horse head pin device includes：

Shank (2)；

It is connected to the shank boss (1) at the top of the shank (2)；

Open slot (6), is arranged on the lateral of the shank (2) and stretches out the top of the shank boss (1) from bottom to up；

Lock core room (4), is arranged in the open slot (6) and is located at the bottom of the open slot (6)；The lock core room has position Inwall on the inside of the open slot (6)；

The slideway (3) of extension is inclined from top to bottom, is arranged in the open slot (6) and by the inwall of the lock core room (4)； The slideway (3) intersects angle a with the axis of shank (2), and a is more than 0 degree, less than 45 degree；

Locking nut (9), is arranged on the top of the shank boss (1) and is fastened on the top of open slot (6)；

The lock core (8) that can be slided along the slideway (3), is arranged in the lock core room (4) and fixed with the locking nut (9) Connection, by tightening for the locking nut (9), the lock core (8) along the slideway (3) upward sliding, while the lock core (8) lateral surface extends radially the open slot (6) tensioner horse head connecting pin bores.

2. self-locking horse head pin device as claimed in claim 1, it is characterised in that the open slot (6) is straight trough.

3. self-locking horse head pin device as claimed in claim 1, it is characterised in that the angle a is 8 degree to 12 degree.

4. self-locking horse head pin device as claimed in claim 1, it is characterised in that the lock core (8) is closing piece.

5. self-locking horse head pin device as claimed in claim 4, it is characterised in that the lateral surface of closing piece is arc surface.

6. self-locking horse head pin device as claimed in claim 1, it is characterised in that the lock core (8) is by locking connecting rod (7) locking nut (9) is connected, external screw thread is provided with the top of locking connecting rod (7).

7. self-locking horse head pin device as claimed in claim 1, it is characterised in that the slideway (3) is plane.

8. self-locking horse head pin device as claimed in claim 1, it is characterised in that the slideway (3) is the face of cylinder.

9. self-locking horse head pin device as claimed in claim 5, it is characterised in that the diameter of the lateral surface of the closing piece with The diameter of the shank (2) is identical.

10. self-locking horse head pin device as claimed in claim 6, it is characterised in that the locking connecting rod (7) is round bar, The depth of the bore less than the open slot (6) of locking connecting rod (7).