CN216343348U

CN216343348U - Crosshead pin

Info

Publication number: CN216343348U
Application number: CN202122637078.2U
Authority: CN
Inventors: 董杰
Original assignee: Jingzhou Alba Petroleum Drilling And Production Equipment Co ltd
Current assignee: Jingzhou Alba Petroleum Drilling And Production Equipment Co ltd
Priority date: 2021-10-29
Filing date: 2021-10-29
Publication date: 2022-04-19
Anticipated expiration: 2031-10-29

Abstract

The utility model relates to the technical field of plunger pump crosshead, and discloses a crosshead pin which comprises a crosshead, wherein a pin hole is formed in the radial middle part of the crosshead, a pin body penetrates through the pin hole, a circular end cap is arranged at one end of the pin body, a regular polygon pin is arranged at the other end of the pin body, the pin hole comprises a circular pin hole and a regular polygon pin hole, the circular pin hole is sleeved on the pin body, the regular polygon pin hole is sleeved on the regular polygon pin, and a screw for fixedly connecting the pin body and the crosshead is arranged at one end, penetrating through the regular polygon pin hole, of the regular polygon pin. The utility model has the following advantages and effects: not only fix the cross head pin on the cross head, but also can be to the simple dismouting of cross head pin to the maintenance.

Description

Crosshead pin

Technical Field

The utility model relates to the technical field of crosshead of plunger pumps, in particular to a crosshead pin.

Background

The crosshead pin is used for connecting the plunger pump crosshead and a connecting rod, and after long-time operation, the crosshead pin and the pin shaft hole are matched to generate relative motion, so that the crosshead accessories are scrapped.

The prior art is with through a plurality of bolt fixed connection between cross head round pin and the cross head for the cross head round pin can't produce relative motion with the round pin shaft hole, guarantees its life. However, the crosshead pin is fixedly connected with a plurality of bolts, so that the crosshead is very bulky, and time and labor are wasted in the assembling and disassembling process.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a crosshead pin which has the functions of fixing and easy disassembly and assembly.

The technical purpose of the utility model is realized by the following technical scheme: a crosshead pin comprises a crosshead and a connecting rod, wherein a pin hole is formed in the radial middle part of the crosshead, a pin body penetrates through the pin hole, and the pin body in the crosshead is inserted into a connecting hole in the lower end of the connecting rod; one end of the pin body is provided with a circular end cap, the other end of the pin body is provided with a regular polygon column, the pin hole comprises a circular pin hole and a regular polygon pin hole, the circular pin hole is sleeved on the pin body, and the regular polygon pin hole is sleeved on the regular polygon column; and a screw is arranged between the regular polygon column and the crosshead for fastening connection.

Through adopting above-mentioned technical scheme, the round pin hole is passed to the round pin body and connecting rod lower extreme connecting hole in the cross head, then insert in the middle of the regular polygon pinhole, then screw up the screw of regular polygon post one end, under the cooperation of regular polygon post and regular polygon pinhole to and the fastening of screw and circular end cap, can fix the radial middle part at the cross head completely with the round pin body, make the connecting rod also connect the cross head completely.

The utility model is further provided with: the screw includes nut and screw rod, the area of nut is greater than the terminal surface area of regular polygon post, regular polygon post passes regular polygon pinhole one end is equipped with the screw hole, the screw rod with screw hole threaded connection, screw rod length is less than the degree of depth of screw hole.

By adopting the technical scheme, the area of the nut of the screw is larger than that of the end face of the regular polygon column, so that the screw can simultaneously clamp the gasket and the regular polygon column; the length of the screw rod is smaller than the depth of the threaded hole, and a gap can be reserved between the screw rod and the bottom of the threaded hole, so that the screw can fasten the regular polygonal column conveniently.

The utility model is further provided with: the regular polygon post stretches out regular polygon pinhole one end and has cup jointed the packing ring, the packing ring is located the cross head with between the screw, the thickness of packing ring is greater than regular polygon stretches out the length of regular polygon pinhole.

Through adopting above-mentioned technical scheme, because regular polygon post is the regular polygon pinhole that stretches out, when the screw is fixed, need the packing ring to step up the screw, guarantee simultaneously that regular polygon cylinder does not surpass packing ring thickness, just so can be through the twist screw, regular polygon post and the fastening of round pin body press from both sides tightly on the cross.

The utility model is further provided with: the nut is provided with an inner hexagonal concave hole.

Through adopting above-mentioned technical scheme, use supporting hexagonal spanner, just can simply unscrew the screw to dismantle the round pin body.

The utility model is further provided with: the cross head is in the terminal surface department of pinhole both sides is provided with the recess, screw with the end cap is located in the recess.

Through adopting above-mentioned technical scheme, prevent that other spare parts evagination from influencing the cross head, make better in its piston cylinder removal of cross head.

The utility model has the beneficial effects that: through this cross head pin structure, it is fixed to have reduced complicated bolt, and to the unnecessary complex technology processing of cross head and cross head pin, makes cross head assembly simple structure and easy dismouting to maintenance and change.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic perspective view of the present embodiment;

FIG. 2 is a sectional view of the structure of the present embodiment;

FIG. 3 is a schematic view of the pin body structure of the present embodiment;

FIG. 4 is a schematic view of the crosshead structure according to the present embodiment;

in the figure, 1, crosshead; 11. a pin hole; 111. a circular pin hole; 112. a regular polygon pin hole; 12. a groove; 2. a connecting rod; 3. a pin body; 31. a circular end cap; 32. a regular polygonal column; 33. a threaded hole; 4. a screw; 41. a nut; 411. a hexagonal concave hole; 42. a screw; 5. a gasket.

Detailed Description

The technical solution of the present invention will be clearly and completely described below with reference to specific embodiments. It is to be understood that the described embodiments are merely a few embodiments of the utility model, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without any inventive step, are within the scope of the present invention.

Example (b): a cross head pin, as shown in figures 1-4, comprises a cross head 1, a pin hole 11 is arranged at the radial middle part of the cross head 1, a pin body 3 penetrates through the pin hole 11, a round end cap 31 is arranged at one end of the pin body 3, a regular polygon column 32 is arranged at the other end of the pin body 3, the pin hole 11 comprises a round pin hole 111 and a regular polygon pin hole 112, the round pin hole 111 is sleeved with the pin body 3, the regular polygon pin hole 112 is sleeved with the regular polygon column 32, a screw 4 which is fixedly connected with the cross head 1 is arranged at one end of the regular polygon pin hole 112, when the cross head 3 penetrates through the round pin hole 111 and a connecting hole at the lower end of a connecting rod 2 in the cross head 1 and then is inserted into the regular polygon pin hole 112, then the screw 4 at one end of the regular polygon column 32 is screwed, the matching of the regular polygon column 32 and the regular polygon pin hole 112, and the screw 4 and the round end cap 31 are fastened, the pin body 3 can be completely fixed at the radial middle part of the cross head 1, connecting rod 2 completely with crosshead 1; the cross head 1 is provided with the recess 12 in the terminal surface department of pinhole 11 both sides, and screw 4 and end cap are located recess 12, prevent that other spare parts evagination from influencing cross head 1, make the better removal in its piston cylinder of cross head 1.

As shown in fig. 2, the end of the regular polygon post 32 extending out of the regular polygon pin hole 112 is sleeved with a washer 5, the washer 5 is positioned between the crosshead 1 and the screw 4, and the thickness of the washer 5 is larger than the length of the regular polygon extending out of the regular polygon pin hole 112. Because the regular polygon column 32 extends out of the regular polygon pin hole 112, when the screw 4 is fixed, the bolt 4 needs to be lifted by the gasket 5, and meanwhile, the thickness of the regular polygon column 32 body does not exceed the thickness of the gasket 5, so that the regular polygon column 32 and the pin body 3 can be tightly clamped on the crosshead 1 by screwing in the bolt 4; the screw 4 comprises a screw cap 41 and a screw rod 42, the area of the screw cap 41 is larger than the area of the end face of the regular polygon column 32, the screw 4 can simultaneously clamp the gasket 5 and the regular polygon column 32, the length of the screw rod 42 in threaded connection with the threaded hole 33 is smaller than the depth of the threaded hole 33, a gap is reserved between the screw rod 42 and the bottom of the threaded hole 33, and the regular polygon column 32 is fastened; the nut 41 is provided with an internal hexagonal recess 411, and the screw 4 can be simply unscrewed using a mating hexagonal wrench, thereby disassembling the pin body 3.

Claims

1. A cross head pin comprises a cross head (1) and a connecting rod (2), and is characterized in that: a pin hole (11) is formed in the radial middle of the crosshead (1), a pin body (3) penetrates through the pin hole (11), and the pin body (3) in the crosshead (1) is inserted into a connecting hole in the lower end of the connecting rod (2); one end of the pin body (3) is provided with a circular end cap (31), the other end of the pin body (3) is provided with a regular polygon column (32), the pin hole (11) comprises a circular pin hole (111) and a regular polygon pin hole (112), the circular pin hole (111) is sleeved on the pin body (3), and the regular polygon pin hole (112) is sleeved on the regular polygon column (32); and a screw (4) is arranged between the regular polygon column (32) and the crosshead (1) for fastening connection.

2. A cross pin as claimed in claim 1, wherein: screw (4) include nut (41) and screw rod (42), the area of nut (41) is greater than the terminal surface area of regular polygon post (32), regular polygon post (32) pass regular polygon pinhole (112) one end is equipped with screw hole (33), screw rod (42) with screw hole (33) threaded connection, screw rod (42) length is less than the degree of depth of screw hole (33).

3. A cross pin as claimed in claim 2, wherein: regular polygon post (32) stretches out regular polygon pinhole (112) one end and has cup jointed packing ring (5), packing ring (5) are located crosshead (1) with between screw (4), the thickness of packing ring (5) is greater than regular polygon stretches out the length of regular polygon pinhole (112).

4. A cross pin as claimed in claim 3, wherein: and an inner hexagonal concave hole (411) is formed in the nut (41).

5. A cross pin as claimed in claim 1, wherein: the crosshead (1) is provided with grooves (12) on both radial sides of the pin hole (11), and the screw (4) and the end cap are located in the grooves (12).