CN212377167U - Brake ring of pumping unit speed reducer and brake structure of pumping unit speed reducer - Google Patents

Abstract

The utility model discloses a beam-pumping unit reduction gear brake ring and beam-pumping unit reduction gear brake structure relates to the oil development field, beam-pumping unit reduction gear brake ring includes the brake ring main part, and the brake ring main part is the opening circle, is provided with the braking area on the internal surface of this brake ring main part, and the one end of brake ring main part is provided with first pressfitting portion, and the other end is provided with second pressfitting portion, still is provided with the connection fixed part on one of brake ring main part. The utility model discloses low in manufacturing cost, safety, it is laborsaving.

Description

Brake ring of pumping unit speed reducer and brake structure of pumping unit speed reducer

Technical Field

The utility model relates to an oil development field, in particular to beam-pumping unit reduction gear brake ring and beam-pumping unit reduction gear brake structure.

Background

The oil pumping unit is a mainstream device commonly used in mechanical oil extraction, and along with the development of oil extraction equipment, the requirement on the oil pumping unit is higher and higher, so that not only performance reliability and economic cost are pursued, but also safety and no danger are pursued.

The brake structure of the reducer of the pumping unit is an important component of the pumping unit, and is very important to the overall performance of the pumping unit, the brake structure of the reducer of the pumping unit generally adopts an external brake structural form as shown in figure 1, adopts a cast steel brake shoe, a brake band and a brake wheel, and connects the brake shoe with the reducer through two screws.

The brake structure of the reducer of the pumping unit has the following defects:

firstly, the brake tile is made of steel casting with reinforcing ribs, so that the weight is heavier and the cost is higher.

Due to the fact that the cast steel brake tile is too high in rigidity, deformation cannot occur in the braking process, abrasion of the brake band is uneven, the service life of the brake band is greatly shortened, meanwhile, the phenomenon of slipping can occur, instantaneous braking cannot be achieved, and great potential safety hazards exist.

And thirdly, the brake tile is connected with the speed reducer by two screws, the connection is unstable, during braking, the brake tile is easy to generate left and right shaking, so that the brake band is not uniform in abrasion, the service life of the brake band is greatly reduced, instantaneous braking cannot be realized, and great potential safety hazards exist.

And fourthly, in the process of transporting or transporting the speed reducer, the brake shoe can not conveniently lock the brake wheel, if the brake wheel shakes or impacts, the brake wheel can rotate in a small range, and a brake claw for locking the brake wheel is easy to damage the brake wheel, so that the brake wheel is scrapped, and unnecessary economic loss is brought.

SUMMERY OF THE UTILITY MODEL

To the above defect, the utility model provides a beam-pumping unit reduction gear brake ring, this beam-pumping unit reduction gear brake ring low in manufacturing cost, safety, it is laborsaving.

The technical scheme is as follows: the utility model provides a pumping unit reduction gear brake ring, pumping unit reduction gear brake ring includes the brake ring main part, and the brake ring main part is the opening circle, is provided with the braking area on the internal surface of this brake ring main part, and the one end of brake ring main part is provided with first pressfitting portion, and the other end is provided with second pressfitting portion, still is provided with the connection fixed part on the one end of brake ring main part.

The pumping unit speed reducer braking ring is connected with the pumping unit speed reducer through the connecting and fixing part, and the braking ring main body is closed through the first pressing part and the second pressing part.

Preferably, the first press fit portion is provided with a first groove, two sides of the first groove are symmetrically provided with first connecting plates, the first connecting plates are provided with first connecting holes, and the second press fit portion is provided with second fastening holes.

The utility model also provides a beam-pumping unit reduction gear brake structure.

The technical scheme is as follows: the utility model provides a pumping unit reduction gear brake structure, includes braked wheel and locking pawl, pumping unit reduction gear brake structure still includes the rim of stopping, and the cladding of brake ring is outside the braked wheel, and the rim of stopping is foretell pumping unit reduction gear rim of stopping.

Preferably, the brake structure of the speed reducer of the pumping unit further comprises a mounting plate, the mounting plate comprises a mounting plate main body, a third connecting hole is formed in the middle of the mounting plate main body, one end of the mounting plate main body is large, the other end of the mounting plate main body is small, a second connecting plate is connected to the small end of the mounting plate main body, a fourth connecting hole is formed in the second connecting plate, a first connecting shaft is arranged on the large end of the mounting plate main body, and the first connecting shaft is.

Preferably, the brake structure of the reducer of the pumping unit further comprises a fastening device, the fastening device comprises a first telescopic piece, a base plate and a pipe cap with an internal thread, the first telescopic piece is located in a first pipe, one end of the first telescopic piece is close to the first connecting shaft, the other end of the first telescopic piece is in close contact with one side of the base plate, the other side of the base plate is closely attached to the inner side face of the pipe cap with the internal thread, the pipe cap is sleeved on the first pipe, the internal thread of the pipe cap is matched with the external thread of the first pipe, and the base plate is located between the first telescopic piece and the.

Preferably, the brake structure of the reducer of the pumping unit further comprises a pull rod and an elastic device, wherein the pull rod is connected with the elastic device; elastic device includes the second extensible member, the third extensible member, thick nut, thin nut, the flat group of pad of registration arm and stereoplasm, the flat group of pad of stereoplasm has 5, be the flat pad of first stereoplasm respectively, the flat pad of second stereoplasm, the flat pad of third stereoplasm, the flat pad of fourth stereoplasm and the flat pad of fifth stereoplasm, the third recess 57 is passed in order to the pull rod, first recess, the flat pad of first stereoplasm, the second extensible member, the flat pad of second stereoplasm, the fourth connecting hole, the flat pad of third stereoplasm, the third extensible member, the registration arm, the flat pad of fourth stereoplasm, the second fastening hole, the flat pad of fifth stereoplasm, thick nut and thin nut.

Preferably, the brake structure of the reducer of the pumping unit further comprises a lever, a first pin and a second pin, a head through hole is formed in one end of the pull rod, the lever comprises a lever body, a fulcrum hole is formed in the lever body, a power action point hole is formed in one side of the fulcrum hole, a resistance action point hole is formed in the other side of the fulcrum hole, the first pin penetrates through the fulcrum hole, the second pin penetrates through the resistance action point hole, the first pin further penetrates through the first connecting hole, and the second pin further penetrates through the head through hole.

Preferably, the lever is further provided with a brake hole, the pumping unit reducer brake structure further comprises a brake bolt, the brake bolt penetrates through the brake hole, the lower end face of the brake bolt is abutted to the first pressing portion, and a locking nut is sleeved on the brake bolt.

The utility model has the advantages that:

the utility model discloses a mounting panel firmly, fixes on reduction gear active bearing box accurately. When braking, the brake ring can not generate displacement phenomenon. The phenomena of brake belt abrasion, brake slip and the like caused by the displacement of the brake ring are avoided, and meanwhile, safety accidents caused by untimely braking are also avoided.

The utility model discloses the brake rim main part adopts the steel sheet assembly welding to form, and the cost that the tile was stopped than the cast steel is more than 30%.

The brake ring main body of the utility model is formed by rolling a 6mm steel plate, and has good elasticity; the brake ring main body can be tightly attached to the brake wheel after being riveted with the brake band, and the attachment rate reaches more than 90%.

The utility model discloses exert a very little pulling force on the lever, just can let the brake band closely laminate with the braked wheel, the even atress of brake band realizes instantaneous braking.

The utility model discloses in reduction gear transportation or transportation, only need to screw up the brake bolt to screw up lock nut and prevent moving back, can realize brake braking, avoid causing the braked wheel to take place small amplitude and rotate the back because of shake or impact, the locking dog damage braked wheel of braking lock braked wheel leads to the braked wheel to scrap, brings unnecessary economic loss.

The utility model discloses in the reduction gear use or in the transportation, brake braking back, can be with brake pawl boss face installation in the brake wheel rim recess, play the braking insurance effect.

Drawings

FIG. 1 is a schematic diagram of the background art of the present invention;

FIG. 2 is a schematic structural diagram of a brake ring of a reducer of the pumping unit;

FIG. 3 is a schematic diagram of the overall structure of the brake structure of the reducer of the pumping unit;

FIG. 4 is a schematic view of FIG. 3 in another orientation;

FIG. 5 is a view from the direction of FIG. 3A-A

FIG. 6 is a schematic view of the mounting plate construction of the present invention;

FIG. 7 is a schematic view of the relationship of the fastening device of the present invention;

FIG. 8 is a schematic view of a lever structure according to the present invention;

in fig. 2 to 8, the pumping unit reducer brake rim 1, the brake rim main body 11, the first press-fit portion 12, the first groove 121, the first connecting plate 122, the first connecting hole 123, the second press-fit portion 13, the second fastening hole 131, the connection fixing portion 14, the second connecting hole 141, the first fastening hole 142, the first tube 143, the brake band 15, the lock nut 16, the brake wheel 2, the fourth groove 21, the mounting plate 3, the mounting plate main body 31, the third connecting hole 32, the second connecting shaft 33, the first connecting shaft 34, the fourth connecting hole 35, the second connecting plate 36, the brake pawl 4, the lever 5, the first pin 51, the second pin 52, the lever body 53, the fulcrum hole 54, the resistance acting point hole 55, the power acting point hole 56, the third groove 57, the brake braking hole 58, the pull rod 6, the second extensible member 7, the third extensible member 71, the first hard flat pad 721, the second hard flat pad 722, the third hard flat pad 723, a fourth hard flat pad 724, a fifth hard flat pad 725, a thick nut 73, a thin nut 74, a positioning pipe 75, a brake bolt 8, a fastening device 9, a first telescopic piece 91, a backing plate 92 and a pipe cap 93.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inner", "outer", "front", "rear", "top", "bottom", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and the terms are only for convenience of description of the present invention and simplifying the description, but do not indicate or imply that the device or element to which the term refers must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be further noted that, unless otherwise explicitly specified or limited, the terms "disposed," "opened," "mounted," "connected," and "connected" are to be construed broadly, e.g., as either a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Please refer to fig. 2, fig. 2 is a schematic structural diagram of a brake rim of the present invention.

The utility model provides a pumping unit reduction gear brake ring 1, includes brake ring main part 11, and brake ring main part 11 is the opening circle, is provided with brake band 15 on the internal surface of this brake ring main part 11, and the one end of brake ring main part 11 is provided with first pressfitting portion 12, and the other end is provided with second pressfitting portion 13, still is provided with on one end of brake ring main part 11 and connects fixed part 14. The brake ring 1 of the pumping unit speed reducer is connected with a mounting plate through a connecting and fixing part 14, the mounting plate is connected with the pumping unit speed reducer, and a brake ring main body 11 is closed through a first pressing part 12 and a second pressing part 13.

Further, in the present invention, a first groove 121 is disposed on the first pressing portion 12, a first connecting plate 122 is symmetrically disposed on two sides of the first groove 121, a first connecting hole 123 is disposed on the first connecting plate 122, and a second fastening hole 131 is disposed on the second pressing portion 13.

Further, in a preferred embodiment of the present invention, the connection fixing portion 14 is provided with a second connection hole 141.

Further, in a preferred embodiment of the present invention, the connection fixing portion 14 is further provided with a first fastening hole 142, the first fastening hole 142 is connected with a first tube 143, the second fastening hole 141 is perpendicular to the first fastening hole 142, and an outer end of the first tube 143 is provided with an external thread.

Further, in the preferred embodiment of the present invention, the brake ring main body 11 is formed by assembling and welding steel plates. Compared with cast steel brake tile, the cost is reduced by more than 30%.

Furthermore, in a preferred embodiment of the present invention, the brake ring main body 11 is made by rolling a 6mm steel plate, and has good elasticity; the brake ring main body 11 can be tightly attached to the brake wheel 2 after being riveted with the brake band 15, and the attachment rate reaches more than 90%.

Based on foretell beam-pumping unit reduction gear rim of stopping 1, the utility model provides a beam-pumping unit reduction gear brake structure.

Referring to fig. 3-8, fig. 3 is a schematic view of the overall structure of a brake structure of a reducer of an oil pumping unit according to the present invention, fig. 4 is a schematic view of fig. 3 in another direction, fig. 5 is a schematic view of fig. 3A-a, fig. 6 is a schematic view of a mounting plate structure according to the present invention, fig. 7 is a schematic view of a relationship between fastening devices according to the present invention, and fig. 8 is a schematic view of a lever structure according to the present invention.

The utility model provides a pumping unit reduction gear brake structure, includes brake rim, cladding braked wheel 2 and the pawl 4 in brake rim, and brake rim is foretell pumping unit reduction gear brake rim 1.

Further, the utility model discloses an in the embodiment of a preferred, beam-pumping unit reduction gear brake structure still includes mounting panel 3, and this mounting panel 3 includes mounting panel main part 31, and this mounting panel main part 31 middle part is provided with third connecting hole 32, and the big one end of mounting panel main part 31 one end is little, is connected with second connecting plate 36 on the tip, is provided with fourth connecting hole 35 on the second connecting plate 36, is provided with first connecting axle 34 on the tip. The first connecting shaft 34 is engaged with the connecting and fixing portion 14, and the first connecting shaft 34 passes through the second connecting hole 141 and is fixed by a pin, so that the brake ring 1 of the reducer of the pumping unit is connected to the mounting plate 3. The mounting plate 3 is connected to the decelerator through the third connection hole 32. During installation, the shaft of the reducer active bearing housing is inserted through the third attachment hole 32 of the mounting plate 3, and then the headblock 2 is mounted on the shaft. The mounting plate 3 is firmly and accurately fixed on the main bearing box of the reducer, during braking, the brake ring 1 of the reducer of the pumping unit cannot generate displacement, phenomena such as abrasion of a brake band 15 and brake slipping caused by displacement of the brake ring 1 of the reducer of the pumping unit are avoided, and safety accidents caused by untimely braking are avoided.

Further, in a preferred embodiment of the present invention, the brake structure of the pumping unit reducer further includes a fastening device 9, the fastening device 9 includes a first telescopic member 91, a pad plate 92 and a pipe cap 93 with internal threads, the first telescopic member 91 is located in the first pipe 143, one end of the first telescopic member is adjacent to the first connecting shaft 34, the other end of the first telescopic member is in close contact with one surface of the pad plate 92, the other surface of the pad plate 92 is in close contact with an inner side surface of the pipe cap 93 with internal threads, the pipe cap 93 is sleeved on the first pipe 143, the internal threads of the pipe cap 93 are matched with the external threads of the first pipe 143, and the pad plate 92 is located between the first telescopic member 91 and the pipe cap 93. The fastening device 9 eliminates the assembly clearance between the second connecting hole 141 and the first connecting shaft 34, so that the brake ring 1 of the pumping unit reducer cannot generate displacement during braking, the phenomena of abrasion of the brake band 15, brake slip and the like caused by the displacement of the brake ring 1 of the pumping unit reducer are avoided, and meanwhile, safety accidents caused by untimely braking are also avoided.

Further, in a preferred embodiment of the present invention, a second connecting shaft 33 is further disposed on the large end, the second connecting shaft 33 mounts the locking pawl 4 on the mounting plate 3, and the other end of the connecting shaft 33 is fixed by a pin.

Further, the utility model discloses an in the embodiment of a preferred, beam-pumping unit reduction gear brake structure still includes pull rod 6 and resilient means, and pull rod 6 links to each other with resilient means, and 6 one end of pull rod are provided with the head through-hole.

Further, in a preferred embodiment of the present invention, the elastic device includes a second expansion member 7, a third expansion member 71, a thick nut 73, a thin nut 74, a positioning tube 75 and a hard flat pad set, the hard flat pad set includes 5 hard flat pads, which are respectively a first hard flat pad 721, a second hard flat pad 722, a third hard flat pad 723, a fourth hard flat pad 724 and a fifth hard flat pad 725, and one end of the pull rod 6, which is far away from the head through hole, sequentially passes through the third groove 57, the first groove 121, the first hard flat pad 721, the second expansion member 7, the second hard flat pad 722, the fourth connecting hole 35, the third hard flat pad 723, the third expansion member 71, the positioning tube 75, the fourth hard flat pad 724, the fastening hole 131, the fifth hard flat pad 725, the thick nut 73 and the thin nut 74.

Further, in a preferred embodiment of the present invention, the brake structure of the pumping unit reducer further includes a lever 5, a first pin 51 and a second pin 52, the lever 5 includes a lever body 53, a fulcrum hole 54 is formed on the lever body 53, a power acting point hole 56 is formed on one side of the fulcrum hole 54, a resistance acting point hole 55 is formed on the other side of the fulcrum hole 54, the first pin 51 passes through the fulcrum hole 54, the second pin 52 passes through the resistance acting point hole 55, the first pin 51 passes through the first connecting hole 123, the second pin 52 passes through the head through hole, the pull rod 6 and the lever body 53 are connected together, and one end of the pull rod 6, which is far away from the lever 5, is fixed by a thick nut 73 and a thin nut 74. When the brake band is used, only a small pulling force is applied to the part fixed in the power action point hole 56, the brake band 15 can be tightly attached to the brake wheel 2, the brake band is uniformly stressed, and instantaneous braking is realized.

Further, in a preferred embodiment of the present invention, the lever 5 is further provided with a brake hole 58, the pumping unit reducer brake structure further includes a brake bolt 8 and a lock nut 16, the brake bolt 8 passes through the brake hole 58, the lower end surface of the brake bolt 8 abuts against the first press-fit portion 12, and the lock nut 16 is sleeved on the brake bolt 8. In the process of transporting or transporting the speed reducer, the brake bolt 8 only needs to be screwed down, the locking nut 16 is screwed down to prevent backing, the brake braking can be realized, and the brake wheel 2 is prevented from being damaged by the brake claw 4 of the brake wheel 2 to cause the brake wheel 2 to rotate in a small amplitude due to shaking or impact in the transporting process, so that the brake wheel 2 is scrapped, and unnecessary economic loss is brought.

Further, in a preferred embodiment of the present invention, the lever 5 is further provided with a third groove 57, and the third groove 57 facilitates installation and fixation of the pull rod 6, and leaves enough space for relative movement between the lever 5 and the pull rod 6 to avoid interference.

Further, in a preferred embodiment of the present invention, the rim of the brake wheel 2 is provided with a fourth groove 21, and the brake pawl 4 is provided with a boss surface, which is engaged with the fourth groove 21. After the speed reducer is braked or in the transportation process, the boss surface of the brake claw 4 can be installed into the fourth groove 21 to play a role in braking safety.

When the device is installed, firstly, the pull rod 6 passes through the third groove 57 and the first groove 121, the first hard flat pad 721, the second telescopic member 7 and the second hard flat pad 722 are sleeved on the pull rod 6 in sequence, then the pull rod 6 passes through the fourth connecting hole 35, the second telescopic member 7 is fixed between the first groove 121 and the second connecting plate 36, then the third hard flat pad 723, the third telescopic member 71, the positioning pipe 75 and the fourth hard flat pad 724 are sleeved on the pull rod 6 in sequence, then the pull rod 6 passes through the second fastening hole 131, the third telescopic member 71 is fixed between the second connecting plate 36 and the second fastening hole 131, the second pin 52 is inserted into the resistance acting point 55 and passes through the head through hole of the pull rod 6, the pull rod 6 is connected with the lever body 53, finally the fifth hard flat pad 725, the thick nut 73 and the thin nut 74 are sleeved on the pull rod 6, after the tightness of the second telescopic member 7 and the third telescopic member 71 is adjusted, the thick nut 73 and the thin nut 74 are tightened. The resilient means exerts a resilient force on the first nip 12 and the second nip 13, which has two functions: (1) when the brake device brakes, the elastic device can enable the first pressing part 12 and the second pressing part 13 to contract towards the second connecting plate 36 at a constant speed, so that the brake ring main body 11 drives the brake band 15 to uniformly contact the brake wheel 2, the brake band 15 is uniformly abraded, and meanwhile, the impact force generated by instantaneous braking is buffered, so that the brake process is stable and effective, the service life of the brake device is prolonged, and the safety of the brake process is improved; (2) when the brake device stops braking, the elastic device can instantly separate the first pressing part 12 and the second pressing part 13, so that the brake band 15 is instantly separated from the brake wheel 2, the abrasion of the brake band 15 is reduced, and the service life of the brake band is prolonged.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The utility model provides a pumping unit reduction gear braking circle which characterized in that: the oil pumping unit speed reducer brake ring comprises a brake ring main body, the brake ring main body is an open ring, a brake band is arranged on the inner surface of the brake ring main body, a first press fit portion is arranged at one end of the brake ring main body, a second press fit portion is arranged at the other end of the brake ring main body, and a connecting and fixing portion is further arranged at one end of the brake ring main body.

2. The pumping unit reducer brake ring of claim 1, characterized in that: the first pressing portion is provided with a first groove, first connecting plates are symmetrically arranged on two sides of the first groove, first connecting holes are formed in the first connecting plates, and second fastening holes are formed in the second pressing portion.

3. The pumping unit reducer brake ring of claim 2, characterized in that: the connecting fixing part is provided with a second connecting hole.

4. The pumping unit reducer brake ring of claim 3, characterized in that: the connecting and fixing part is further provided with a first fastening hole, a first pipe is connected onto the first fastening hole, and the outer end of the first pipe is provided with an external thread.

5. The utility model provides a beam-pumping unit reduction gear brake structure, includes braked wheel and locking pawl, its characterized in that: the pumping unit reduction gear brake structure still includes the brake circle, and the brake circle cladding is outside the braked wheel, the brake circle be claim 4 pumping unit reduction gear brake circle.

6. The brake structure of the pumping unit speed reducer according to claim 5, wherein: the brake structure of the speed reducer of the pumping unit further comprises a mounting plate, the mounting plate comprises a mounting plate main body, a third connecting hole is formed in the middle of the mounting plate main body, one end of the mounting plate main body is large and small, a second connecting plate is connected to the small end of the mounting plate main body, a fourth connecting hole is formed in the second connecting plate, a first connecting shaft is arranged on the large end of the mounting plate main body, and the first connecting shaft is matched with a connecting fixing portion.

7. The brake structure of the pumping unit speed reducer according to claim 5, wherein: the brake structure of the speed reducer of the pumping unit further comprises a fastening device, the fastening device comprises a first telescopic piece, a base plate and a pipe cap with an internal thread, the first telescopic piece is located in a first pipe, one end of the first telescopic piece leans against a first connecting shaft, the other end of the first telescopic piece is in close contact with one side of the base plate, the other side of the base plate is tightly attached to the inner side face of the pipe cap with the internal thread, the pipe cap is sleeved on the first pipe, the internal thread of the pipe cap is matched with the external thread of the first pipe, and the base plate is located between the first telescopic piece and.

8. The brake structure of the reducer of the pumping unit according to any one of claims 5 to 7, wherein: the brake structure of the reducer of the pumping unit further comprises a pull rod and an elastic device, and the pull rod is connected with the elastic device; elastic device includes the second extensible member, the third extensible member, thick nut, thin nut, the flat group of pad of registration arm and stereoplasm, the flat group of pad of stereoplasm has 5, be the flat pad of first stereoplasm respectively, the flat pad of second stereoplasm, the flat pad of third stereoplasm, the flat pad of fourth stereoplasm and the flat pad of fifth stereoplasm, the third recess is passed in order to the pull rod, first recess, the flat pad of first stereoplasm, the second extensible member, the flat pad of second stereoplasm, the fourth connecting hole, the flat pad of third stereoplasm, the third extensible member, the registration arm, the flat pad of fourth stereoplasm, the second fastening hole, the flat pad of fifth stereoplasm, thick nut and thin nut.

9. The brake structure of the pumping unit speed reducer according to claim 8, wherein: the brake structure of the speed reducer of the pumping unit further comprises a lever, a first pin and a second pin, a head through hole is formed in one end of the pull rod, the lever comprises a lever body, a fulcrum hole is formed in the lever body, a power action point hole is formed in one side of the fulcrum hole, a resistance action point hole is formed in the other side of the fulcrum hole, the first pin penetrates through the fulcrum hole, the second pin penetrates through the resistance action point hole, the first pin further penetrates through a first connecting hole, and the second pin further penetrates through the head through hole.

10. The brake structure of the pumping unit speed reducer according to claim 9, wherein: the lever is further provided with a brake hole, the brake structure of the pumping unit speed reducer further comprises a brake bolt, the brake bolt penetrates through the brake hole, the lower end face of the brake bolt is abutted to the first pressing part, and a locking nut is sleeved on the brake bolt.

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