A stable double-connecting rod reversing oil pumping unit

Abstract

The invention discloses a stable double-link reversing oil pumping unit, which relates to the technical field of oil pumping units, and includes a base, a counterweight box and a double-link driving assembly. A base frame is installed on one side of the base, and a power mechanism is installed on the upper side of the base. A retaining frame is installed inside the base frame, and the counterweight box is slidably connected inside the retaining frame, and a group of contact components are installed in the top of the retaining frame or the bottom of the base frame; the two ends of the double-link driving assembly are respectively connected to the output end of the counterweight box and the power mechanism; both sides of the counterweight box are provided with retaining grooves, and the counterweight box is located on one side of the two groups of retaining grooves. Connected storage areas and accommodating grooves are sequentially provided. The invention is provided with a retaining frame on the outside of the counterweight box for increasing the stability of the counterweight box when it moves, and when the counterweight box is driven to move by the double-link driving assembly, the movement path of the counterweight box can be maintained, and the contact part of the counterweight box with the retaining frame is provided with a structure that can increase the lubricating medium.

Description

Technical Field

[0001] The invention relates to the technical field of oil pumping units, in particular to a stable double-connecting rod reversing oil pumping unit. Background Art

[0002] The double-connecting rod reversing oil pumping unit is a new type of oil pumping unit with the advantages of long stroke, low stroke frequency, large load, high efficiency, long service life and low failure rate of the whole machine.

[0003] After searching, a Chinese patent application (publication number: CN111255418A) discloses a double-connecting rod reversing oil pumping unit and method. In this patent, two sets of upper sprockets are installed on a frame, two sets of lower sprockets are installed on two output shafts of a reducer, a chain is sleeved on the upper sprocket and the lower sprocket, one end of the connecting rod is installed on a counterweight box, and the other end is installed on the chain through a special chain link, one end of a wide belt is installed on the counterweight box, and the other end is installed on the oil well sucker rod through a wire rope, a drum is installed on the top of the frame, a reducer and a motor are installed at the bottom of the frame, the motor drives the reducer, and drives the two chains to rotate separately through the two output shafts of the reducer, one chain rotates clockwise, and the other rotates counterclockwise, and supports two connecting rods through special chain links respectively, and the two connecting rods drive the counterweight box to achieve up and down movement and reversal.

[0004] In the prior art, when the counterweight box in the double-link reversing oil pumping unit is used for a long time, it is moved through the double-link rods, thereby driving the wide belt to move. Therefore, in order to further improve the service life of the oil pumping unit, it is necessary to improve the operating stability of the internal structure of the oil pumping unit. Furthermore, the present invention proposes a stable double-link reversing oil pumping unit. Summary of the invention

[0005] The purpose of the present invention is to provide a stable double-connecting rod reversing oil pumping unit.

[0006] The technical problem solved by the present invention is: how to improve the stability of the internal structure of a double-connecting rod reversing oil pumping unit during operation, thereby increasing the service life of the double-connecting rod reversing oil pumping unit.

[0007] The present invention can be implemented by the following technical scheme: A stable double-link reversing oil pumping unit comprises a base, a base frame is installed on one side of the base, and a power mechanism is installed on the upper side of the base;

[0008] A retaining frame is installed inside the base frame, a counterweight box is slidably connected inside the retaining frame, and a double-link driving assembly is installed inside the base frame on one side of the retaining frame;

[0009] The two ends of the double-link driving assembly are respectively connected to the counterweight box and the output end of the power mechanism;

[0010] And a set of contact components is installed in the top of the cage or the bottom of the base frame;

[0011] A roller is installed on the top of the base frame, and a stabilizing frame is installed on the side of the base frame facing away from the base. A wide belt is installed on the top of the counterweight box. The wide belt passes over the top of the roller and passes through the stabilizing frame to be connected to the oil well pumping rod.

[0012] Both sides of the counterweight box are provided with retaining grooves, which are used to fit with the corresponding parts of the retaining frame, and when the counterweight box moves, the retaining grooves and the corresponding parts of the retaining frame slide relatively, and the counterweight box is provided with storage areas on one side of the two groups of retaining grooves, and the counterweight box is provided with accommodating grooves on one side of the two groups of storage areas, the bottom of the accommodating grooves is connected with the storage area on the corresponding side, and the accommodating grooves store lubricating medium;

[0013] A push rod is slidably connected to one side of the two groups of receiving grooves inside the counterweight box, and a driving structure is installed inside the counterweight box in a direction corresponding to the contact component, and the sliding position of the push rod is the bottom of the corresponding stabilizing frame;

[0014] After the driving structure contacts the corresponding contact component, it drives the push rod to move, and pushes the lubricating medium in the receiving groove into the receiving area.

[0015] A further technical improvement of the present invention is that the double-link drive assembly includes two sets of upper sprockets and two sets of lower sprockets;

[0016] Two sets of upper sprockets and two sets of lower sprockets are respectively installed on the upper and lower sides of the base frame, and the two sets of upper sprockets and the two sets of lower sprockets are symmetrically arranged inside the base frame, and a chain is installed between one set of upper sprockets and one set of lower sprockets, and the two sets of chains are symmetrically arranged;

[0017] Connecting rods are installed between the two sets of chains and the counterweight box, and the two sets of connecting rods are symmetrically arranged;

[0018] The power mechanism includes an electric motor and a reducer. The reducer is provided with two sets of output shafts. The electric motor is connected to the reducer to drive the reducer to work. The two sets of lower sprockets are respectively connected to the two sets of output shafts of the reducer. The two output shafts of the reducer drive the two sets of chains to rotate respectively, one chain rotates clockwise and the other rotates counterclockwise. The two connecting rods supported by the chains drive the counterweight box to achieve up and down movement and reversing.

[0019] A further technical improvement of the present invention is that the contact assembly comprises a stroke cylinder, the output end of the stroke cylinder faces the counterweight box and is equipped with a contact frame.

[0020] A further technical improvement of the present invention is that: when a group of contact components is installed in the top of the retaining frame or the bottom of the base frame;

[0021] The driving structure comprises a connecting frame and two groups of power blocks. The driving structure comprises a connecting frame, the connecting frame is arranged on the side of the push rod facing the contact assembly, and an extension frame extending to the outside of the counterweight box is installed on the side of the connecting frame;

[0022] A plurality of elastic rods are installed between the side of the connecting frame facing away from the extension frame and the counterweight box, and sliding rods extending to one side of the two groups of push rods are installed at both ends of the connecting frame, and pulleys are rotatably connected to one end of the two groups of slide rods facing the push rods;

[0023] The two groups of power blocks are respectively installed at one end of the two groups of push rods facing away from the corresponding receiving grooves, and the two groups of power blocks are provided with inclined surfaces on one side facing the corresponding pulleys;

[0024] When the pulley moves based on the corresponding sliding rod, it contacts the inclined surface of the power block, thereby driving the push rod to translate and push the lubricating medium at the bottom of the receiving groove into the receiving area.

[0025] A further technical improvement of the present invention is that: when a set of contact components are installed on the top of the retaining frame and the bottom of the base frame;

[0026] The driving structure comprises two sets of connecting frames and two sets of power blocks. The driving structure comprises two sets of connecting frames, which are respectively arranged on the upper and lower sides of the counterweight box, and the sides of the two sets of connecting frames are both installed with extension frames extending to the outside of the counterweight box;

[0027] A plurality of elastic rods are installed between the side of the connecting frame facing away from the extension frame and the counterweight box, and sliding rods extending to one side of the two groups of push rods are installed at both ends of the connecting frame, and pulleys are rotatably connected to one end of the two groups of slide rods facing the push rods;

[0028] The two groups of power blocks are respectively installed at one end of the two groups of push rods facing away from the corresponding accommodating grooves, and the two groups of power blocks are provided with inclined surfaces on both sides facing the corresponding two groups of pulleys.

[0029] A further technical improvement of the present invention is that: the receiving area includes a groove body, the groove body is arranged between the receiving groove and the retaining groove, and a connecting hole is arranged between the groove body and the receiving groove for the lubricating medium to pass through;

[0030] The connecting hole is in a truncated cone shape, and the end with a smaller diameter of the connecting hole is connected to the accommodating groove. The diameter of the connecting hole corresponds to the pushing rod and is located in the same axial direction. When the pushing rod moves, its corresponding end passes through the connecting hole.

[0031] A further technical improvement of the present invention is that: the tank body is provided with partitions on both the upper and lower sides of the communicating hole, and a plurality of elastic members are installed between the two groups of partitions and the tank body;

[0032] The opposite ends of the two groups of partitions extend to one side of the communicating hole.

[0033] A further technical improvement of the present invention is that: the stabilizing frame includes a swing mechanism, the swing mechanism is connected to the base frame, and a fixing frame is installed at the output end of the swing mechanism, a first contact cylinder is installed at the top of the side of the fixing frame, and a driving module is installed on the side of the fixing frame located at one side of the first contact cylinder, and a second contact cylinder is installed at the output end of the driving module;

[0034] When in use, the wide belt passes between the first contact cylinder and the second contact cylinder.

[0035] A further technical improvement of the present invention is that both the second contact cylinder and the first contact cylinder include a support body, and a roller body is rotatably connected to the outer side of the support body.

[0036] Compared with the prior art, the present invention has the following beneficial effects:

[0037] Compared with the prior art, the present invention is provided with a retaining frame for increasing the stability of the counterweight box when it moves, and when the counterweight box is driven to move by the double-link driving assembly, the moving path of the counterweight box can be maintained, thereby improving the stability, and the contact portion between the counterweight box and the retaining frame is provided with a structure for adding a lubricating medium, and the lubricating medium can be added to the contact portion, thereby increasing the service life of the counterweight box and the retaining frame;

[0038] In addition, the present invention is provided with a stabilizing frame outside the moving path of the wide belt, which can maintain the stability of the wide belt when it moves, and during maintenance, the stabilizing frame can change the position of the wide belt when the power mechanism is not working, thereby facilitating the maintenance and care of the wide belt by the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0040] Figure 1 It is a front view of the present invention;

[0041] Figure 2 is a cross-sectional view of the counterweight box in the present invention;

[0042] Figure 3 For the present invention Figure 2 A magnified view of the structure of part A;

[0043] Figure 4 It is a structural schematic diagram of the counterweight box and the double-link driving assembly in the present invention;

[0044] Figure 5 It is a side view of the stabilizing frame of the present invention;

[0045] Figure 6 It is a right side view of the present invention;

[0046] Figure 7 It is a left side view of the present invention;

[0047] In the figure: 1. base; 2. base frame; 3. power mechanism; 4. lower sprocket; 5. upper sprocket; 6. chain; 7. counterweight box; 8. wide belt; 9. roller; 10. retaining frame; 11. contact assembly; 12. stabilizing frame; 13. pushing rod; 14. power block; 15. driving structure; 16. storage area; 17. accommodating groove; 61. connecting rod; 71. retaining groove; 72. connecting hole; 111. stroke cylinder; 112. contact frame; 151. connecting frame; 152. elastic rod; 153. extension frame; 154. sliding rod; 155. pulley; 161. trough body; 162. partition; 163. elastic member; 121. fixing frame; 122. driving module; 123. first contact cylinder; 124. second contact cylinder; 125. swing mechanism. DETAILED DESCRIPTION

[0048] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation methods, structures, features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0049] See also Figure 1-7 As shown, a stable double-link reversing oil pumping unit comprises a base 1, a base frame 2 is installed on one side of the base 1, and a power mechanism 3 is installed on the upper side of the base 1;

[0050] A retaining frame 10 is installed inside the base frame 2, a counterweight box 7 is slidably connected inside the retaining frame 10, and a double-link driving assembly is installed inside the base frame 2 on one side of the retaining frame 10;

[0051] The two ends of the double-link driving assembly are respectively connected to the counterweight box 7 and the output end of the power mechanism 3;

[0052] And a set of contact components 11 are installed in the top of the retaining frame 10 and the bottom of the base frame 2;

[0053] A roller 9 is installed on the top of the base frame 2, and a stabilizing frame 12 is installed on the side of the base frame 2 facing away from the base 1. A wide belt 8 is installed on the top of the counterweight box 7. The wide belt 8 passes over the top of the roller 9 and passes through the stabilizing frame 12 to be connected to the oil well pumping rod.

[0054] The counterweight box 7 is provided with retaining grooves 71 on both sides, and a storage area 16 is provided inside the counterweight box 7 on one side of the two groups of retaining grooves 71, and a receiving groove 17 is provided inside the counterweight box 7 on one side of the two groups of receiving areas 16, the bottom of the receiving groove 17 is connected to the receiving area 16 on the corresponding side, and a lubricating medium is stored inside the receiving groove 17;

[0055] A push rod 13 is slidably connected to one side of the two groups of receiving slots 17 inside the counterweight box 7, and a driving structure 15 is installed inside the counterweight box 7 in a direction corresponding to the contact assembly 11, and the sliding position of the push rod 13 corresponds to the bottom of the stabilizing frame 12;

[0056] After the driving structure 15 contacts the corresponding contact assembly 11 , it drives the push rod 13 to move, and pushes the lubricating medium in the receiving groove 17 into the receiving area 16 .

[0057] The double connecting rod drive assembly includes two sets of upper sprockets 5 and two sets of lower sprockets 4;

[0058] They are respectively installed on the upper and lower sides of the base frame 2, and the two sets of upper sprocket wheels 5 and the two sets of lower sprocket wheels 4 are symmetrically arranged inside the base frame 2, and a chain 6 is installed between one set of upper sprocket wheels 5 and one set of lower sprocket wheels 4, and the two sets of chains 6 are symmetrically arranged;

[0059] Connecting rods 61 are installed between the two sets of chains 6 and the counterweight box 7, and the two sets of connecting rods 61 are symmetrically arranged;

[0060] The power mechanism 3 includes a motor and a reducer. The reducer is provided with two sets of output shafts. The motor is connected to the reducer to drive the reducer to work. The two sets of lower sprockets 4 are respectively connected to the two sets of output shafts of the reducer. The two output shafts of the reducer drive two sets of chains 6 to rotate respectively. One chain 6 rotates clockwise and the other rotates counterclockwise. The two connecting rods 61 are supported by the chains 6 respectively. The two connecting rods 61 drive the counterweight box 7 to move up and down and reverse. The working mode of the double connecting rod drive assembly driving the counterweight box 7 is as described in the patent with publication number CN111255418A;

[0061] The contact assembly 11 comprises a stroke cylinder 111 , the output end of which faces the counterweight box 7 and is provided with a contact frame 112 .

[0062] See also Figure 2-3 As shown, the driving structure 15 includes two groups of connecting frames 151 and two groups of power blocks 14. The driving structure 15 includes two groups of connecting frames 151, which are respectively arranged on the upper and lower sides of the counterweight box 7, and the sides of the two groups of connecting frames 151 are both installed with extension frames 153 extending to the outside of the counterweight box 7;

[0063] A plurality of elastic rods 152 are installed between the side of the connecting frame 151 facing away from the extension frame 153 and the counterweight box 7, and sliding rods 154 extending to one side of the two groups of push rods 13 are installed at both ends of the connecting frame 151, and the ends of the two groups of slide rods 154 facing the push rods 13 are rotatably connected to pulleys 155;

[0064] The two power blocks 14 are respectively installed at one end of the two push rods 13 facing away from the corresponding receiving slots 17 , and both sides of the two power blocks 14 facing the corresponding two pulleys 155 are provided with inclined surfaces.

[0065] The receiving area 16 includes a groove body 161, which is opened between the receiving groove 17 and the retaining groove 71, and a connecting hole 72 is opened between the groove body 161 and the receiving groove 17 for the lubricating medium to pass through;

[0066] The connecting hole 72 is truncated cone-shaped, and the end with a smaller diameter of the connecting hole 72 is connected to the accommodating groove 17 . The diameter of the connecting hole 72 corresponds to the push rod 13 and is located in the same axial direction. When the push rod 13 moves, its corresponding end passes through the connecting hole 72 .

[0067] The slot body 161 is provided with partitions 162 on both the upper and lower sides of the communicating hole 72, and a plurality of elastic members 163 are installed between the two groups of partitions 162 and the slot body 161;

[0068] The opposite ends of the two groups of partitions 162 extend to one side of the communication hole 72 .

[0069] See also Figure 5 As shown, the stabilizing frame 12 includes a swing mechanism 125, the swing mechanism 125 is connected to the base frame 2, and a fixing frame 121 is installed at the output end of the swing mechanism 125, a first contact cylinder 123 is installed at the top of the side of the fixing frame 121, and a driving module 122 is installed on the side of the fixing frame 121 located at one side of the first contact cylinder 123. The driving module 122 adopts a screw mechanism in this embodiment, and a second contact cylinder 124 is installed at the output end of the driving module 122;

[0070] The connection part between the swing mechanism 125 and the fixing frame 121 is coaxially distributed with the first contact cylinder 123. After the swing mechanism 125 is started, the fixing frame 121 is driven to rotate with the first contact cylinder 123 as the center.

[0071] When in use, the wide belt 8 passes between the first contact cylinder 123 and the second contact cylinder 124 .

[0072] The second contact cylinder 124 and the first contact cylinder 123 both include a support body, and a roller body is rotatably connected to the outer side of the support body.

[0073] When the present invention is used:

[0074] The power mechanism 3 drives the counterweight box 7 to move up and down along the holder 10 through the double-link driving assembly. After the counterweight box 7 moves a preset number of times or time, the stroke cylinder 111 in the contact assembly 11 at the top of the holder 10 or the bottom of the base frame 2 is started to move the contact frame 112 to the inside of the moving path of the counterweight box 7;

[0075] After the counterweight box 7 moves, the extension frame 153 in the corresponding direction of the driving structure 15 contacts the contact frame 112, thereby compressing the elastic rod 152 through the connecting frame 151 to drive the sliding rod 154 to slide. After sliding, the sliding rod 154 contacts the inclined surface of the power block 14, thereby driving the push rod 13 to move horizontally;

[0076] After the push rod 13 moves horizontally, the lubricating medium inside the stabilizing frame 12 is pushed along the connecting hole 72 to the groove body 161 of the storage area 16. The lubricating medium compresses each elastic member 163 in the groove body 161 through the partition 162, so that the lubricating medium is retained in the groove body 161.

[0077] And with the subsequent movement of the counterweight box 7, each elastic member 163 applies pressure to the lubricating medium in the groove body 161 through the interlayer 162, and applies it to the outside of the contact part between the retaining groove 71 and the retaining frame 10, thereby lubricating;

[0078] And when working, the distance between the second contact cylinder 124 and the first contact cylinder 123 in the stabilizing frame 12 is set larger, so as to increase the distance between the contact part with the wide belt 8;

[0079] During maintenance, the driving module 122 is first started to move the second contact cylinder 124 to one side of the first contact cylinder 123, and then the swing mechanism 125 rotates to drive the fixing frame 121 to rotate toward the side of the first contact cylinder 123 facing away from the second contact cylinder 124, so that the first contact cylinder 123 and the second contact cylinder 124 are tangent to the wide belt 8, so that the first contact cylinder 123 cooperates with the second contact cylinder 124 to roll up the wide belt 8;

[0080] When the height of the wide belt 8 needs to be adjusted later, the driving module 122 is started to adjust the height of the wide belt 8 by changing the distance between the second contact cylinder 124 and the first contact cylinder 123 .

[0081] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A stable double-link reversing oil pumping unit, comprising a base (1), a counterweight box (7) and a double-link driving assembly, wherein a base frame (2) is mounted on one side of the base (1), a power mechanism (3) is mounted on the upper side of the base (1), and a roller (9) is mounted on the top of the base frame (2), characterized in that: A retaining frame (10) is installed inside the base frame (2), the counterweight box (7) is slidably connected inside the retaining frame (10), and a group of contact components (11) are installed in the top of the retaining frame (10) and / or the bottom of the base frame (2); The two ends of the double-link driving assembly are respectively connected to the counterweight box (7) and the output end of the power mechanism (3); A wide belt (8) is installed on the top of the counterweight box (7), and the wide belt (8) passes over the top of the roller (9) and passes through the stabilizing frame (12); The counterweight box (7) is provided with retaining grooves (71) on both sides, and the counterweight box (7) is provided with communicating storage areas (16) and receiving grooves (17) in sequence on one side of the two groups of retaining grooves (71); A push rod (13) is slidably connected to one side of the two groups of receiving grooves (17) inside the counterweight box (7), and a driving structure (15) is installed inside the counterweight box (7) in a direction corresponding to the contact assembly (11); After the driving structure (15) contacts the corresponding contact assembly (11), it drives the push rod (13) to move, thereby pushing the lubricating medium inside the receiving groove (17) into the receiving area (16).

2. A stable double-connecting rod reversing pumping unit according to claim 1, characterized in that: The contact assembly (11) comprises a stroke cylinder (111), the output end of the stroke cylinder (111) faces the counterweight box (7) and is provided with a contact frame (112).

3. A stable double-connecting rod reversing pumping unit according to claim 2, characterized in that: A set of contact components (11) is installed in the top of the retaining frame (10) or the bottom of the base frame (2); The driving structure (15) comprises a connecting frame (151) and two groups of power blocks (14). The driving structure (15) comprises a connecting frame (151), wherein the connecting frame (151) is arranged on a side of the push rod (13) facing the contact assembly (11), and an extension frame (153) extending to the outside of the counterweight box (7) is installed on a side of the connecting frame (151); A plurality of elastic rods (152) are installed between the side of the connecting frame (151) facing away from the extension frame (153) and the counterweight box (7), and sliding rods (154) extending to one side of the two groups of push rods (13) are installed at both ends of the connecting frame (151), and the ends of the two groups of slide rods (154) facing the push rods (13) are rotatably connected to pulleys (155); The two groups of power blocks (14) are respectively mounted on one end of the two groups of push rods (13) facing away from the corresponding receiving groove (17), and the two groups of power blocks (14) are both provided with an inclined surface on one side facing the corresponding pulley (155).

4. A stable double-connecting rod reversing pumping unit according to claim 2, characterized in that: A set of contact components (11) are installed on the top of the retaining frame (10) and the bottom of the base frame (2); The driving structure (15) comprises two groups of connecting frames (151) and two groups of power blocks (14). The driving structure (15) comprises two groups of connecting frames (151), the two groups of connecting frames (151) are respectively arranged on the upper and lower sides of the counterweight box (7), and the sides of the two groups of connecting frames (151) are both provided with extension frames (153) extending to the outside of the counterweight box (7); A plurality of elastic rods (152) are installed between the side of the connecting frame (151) facing away from the extension frame (153) and the counterweight box (7), and sliding rods (154) extending to one side of the two groups of push rods (13) are installed at both ends of the connecting frame (151), and the ends of the two groups of slide rods (154) facing the push rods (13) are rotatably connected to pulleys (155); The two groups of power blocks (14) are respectively mounted on one end of the two groups of push rods (13) facing away from the corresponding receiving grooves (17), and both sides of the two groups of power blocks (14) facing the corresponding two groups of pulleys (155) are provided with inclined surfaces.

5. The stable double-connecting rod reversing pumping unit according to claim 1, characterized in that: The storage area (16) comprises a groove body (161), the groove body (161) is provided between the receiving groove (17) and the retaining groove (71), and a communication hole (72) is provided between the groove body (161) and the receiving groove (17); The communicating hole (72) is in the shape of a truncated cone, and the end of the communicating hole (72) with a smaller diameter is in communication with the containing groove (17).

6. A stable double-connecting rod reversing pumping unit according to claim 5, characterized in that: The groove body (161) is provided with partitions (162) on both the upper and lower sides of the communicating hole (72), and a plurality of elastic members (163) are installed between the two groups of partitions (162) and the groove body (161); The opposite ends of the two groups of partitions (162) both extend to one side of the communicating hole (72).

7. The stable double-connecting rod reversing pumping unit according to claim 1, characterized in that: The stabilizing frame (12) comprises a swing mechanism (125), a fixing frame (121) is installed at the output end of the swing mechanism (125), a first contact cylinder (123) is installed at the top end of the side of the fixing frame (121), a driving module (122) is installed at one side of the side of the fixing frame (121) located at the first contact cylinder (123), and a second contact cylinder (124) is installed at the output end of the driving module (122).

8. A stable double-connecting rod reversing pumping unit according to claim 7, characterized in that: The second contact cylinder (124) and the first contact cylinder (123) both comprise a support body, and a roller body is rotatably connected to the outer side of the support body.

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