Automatic adjusting device for pumping unit belt

Abstract

The invention discloses an automatic pumping unit belt adjusting device, and relates to the technical field of pumping units. A guide rail is arranged on a base; the sliding seat is slidably assembled on the guide rail and is used for assembling the motor; the execution assembly is assembled between the sliding base and the base and used for driving the sliding base to move in the axial direction of the guide rail. The adjusting assembly is rotationally assembled at one end of the base and provided with an elastic piece. When the execution assembly drives the sliding base to move in one direction, the elastic piece of the adjusting assembly is stretched and stores constant force equivalent to the target tensioning force of the motor belt. When the actual tensioning force of the motor belt is smaller than the target tensioning force, the elastic piece releases the constant force through the adjusting assembly and pulls the sliding base to move in the opposite direction so as to maintain the tensioning force of the motor belt to be constant. By the adoption of the technical scheme, compared with an existing adjusting device, motor driving adjustment is not needed, dynamic self-adjustment of the belt tensioning force can be achieved, operation is easy, the failure rate is extremely low, belt consumption is reduced, and the liquid production capacity is increased.

Description

Technical Field

[0001] The invention relates to the technical field of oil pumping units, and in particular to an automatic belt adjusting device for an oil pumping unit. Background Art

[0002] In the oil pumping unit industry, as a core piece of equipment for oilfield production, the transmission system generally utilizes a belt drive structure, connecting the motor's driving pulley with the pumping unit's driven pulley via a belt to transmit power. However, the physical properties of the belt material dictate that its elasticity will decay over time, causing it to lengthen. If the driving and driven pulleys are fixed relative to each other, a loose belt will directly affect power transmission efficiency. Furthermore, if the belt breaks at night and there is no one on duty, the unit cannot be shut down after a break, resulting in continuous idling and significant energy loss. Natural relaxation caused by reduced belt elasticity is a common problem in the industry. Existing pumping unit belt tensioning and adjustment solutions mainly rely on electric drive devices to drive the displacement of the motor base to mechanically tighten the belt. This type of solution has inherent defects: the adjustment motor requires a complex circuit system, and long-term operation is prone to circuit failures, motor jamming and other problems, resulting in the failure of the tension adjustment function. In the event of a failure of the electric adjustment device or initial installation, manual adjustment of the motor position or tensioning bolts is still required. The operation requires the cooperation of multiple people and relies on special tools, which is time-consuming and labor-intensive. The accuracy of manual adjustment depends on experience, which can easily lead to uneven tension or over-tensioning. In addition, the low efficiency of manual adjustment directly prolongs the belt replacement time, shortens the effective liquid production time, and affects oilfield production. Summary of the Invention

[0003] The purpose of the present invention is to address the defects and shortcomings of the existing technology and provide an automatic adjustment device for the oil pump belt, which at least solves one of the above-mentioned technical problems, does not require motor-driven adjustment, has the advantage of being able to achieve dynamic self-adjustment of the belt tension, is simple to operate, has an extremely low failure rate, reduces belt consumption, increases liquid production, and reduces the labor intensity of workers.

[0004] To achieve the above object, the present invention adopts the following technical solution: an automatic adjustment device for an oil pumping unit belt, comprising: The base is provided with a guide rail extending along the tensioning direction of the motor belt; A slide seat, slidably assembled on the guide rail, for assembling the power supply; an actuator assembly, assembled between the slide and the base, the actuator assembly being used to drive the slide to move axially along the guide rail; and An adjusting component is rotatably assembled on one end of the base, one end of the adjusting component is connected to the other end of the base, and the other end is connected to the slide seat, and the adjusting component is provided with an elastic member; When the actuator drives the slide to move in one direction, the elastic member of the adjustment assembly is stretched and stores a constant force equivalent to the target tension of the motor belt; When the actual tension of the motor belt is less than the target tension, the elastic member releases the constant force through the adjustment assembly and pulls the slide to move in the opposite direction to maintain the constant tension of the motor belt.

[0005] The present invention further provides that the slide includes: an active slide slidably assembled on the guide rail and used for assembling the execution component and the adjustment component, and a driven slide slidably assembled on the guide rail and cooperating with the active slide.

[0006] The present invention is further provided that the adjustment assembly includes: the elastic member having one end detachably assembled on one end of the base and the other end being a free end, a variable force wheel mechanism rotatably assembled on the base away from one end of the elastic member, and a first traction member having one end connected to the free end of the elastic member and the other end connected to the active slide and engaged with the variable force wheel mechanism.

[0007] The present invention further provides that a first mounting frame for rotating and aligning the variable force wheel mechanism is provided on the base.

[0008] The present invention further provides that the actuator assembly includes: a driving member having one end rotatably mounted on the active slide and the other end extending outwardly as a free end; a winding mechanism disposed on the active slide and transmission-connected to the driving member; and a second traction member having one end connected to a side of the base close to the elastic member and the other end connected to the winding mechanism; The driving member is driven to rotate, driving the winding mechanism to reel in the second traction member, and at the same time driving the active slide to slide. The sliding of the active slide drives the variable force wheel mechanism to rotate through the first traction member and pulls the elastic member to stretch and deform.

[0009] The present invention further provides that a second mounting bracket for rotatably assembling the driving member is provided on a side of the active slide toward the driven slide.

[0010] The present invention further provides that the execution component further includes: a sensor arranged between the base and the second traction member.

[0011] The present invention further provides that the base also includes: a plurality of protective covers that are provided and sleeved on the guide rails.

[0012] The present invention further provides that a limit switch is provided on the slide seat, and a limit member cooperating with the limit switch is provided on a side of the base facing the slide seat.

[0013] The present invention further provides that the slide seat is also provided with a mounting hole for assembling the power supply motor.

[0014] After adopting the above technical solution, the beneficial effects of the present invention are as follows: In the present invention, by providing an actuator and an adjustment assembly, wherein the adjustment assembly is provided with an elastic member, when the actuator is driven to rotate in one direction, the slide is driven to move in one direction along the guide rail, and the slide slides and causes the elastic member of the adjustment assembly to be stretched and store a constant force equivalent to the target tension of the motor belt; when the actual tension of the motor belt is less than the target tension, the elastic member releases the constant force through the adjustment assembly to pull the slide in the opposite direction to tighten the motor belt, so that the constant force of the adjustment assembly is always equivalent to the target tension of the motor belt. Therefore, compared with the existing automatic adjustment device, the present invention does not require motor drive adjustment, has the ability to achieve dynamic self-adjustment of belt tension, is simple to operate, has an extremely low failure rate, reduces belt consumption, increases liquid production, and reduces the labor intensity of workers. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 It is a structural diagram of the automatic adjustment device of the pumping unit belt; Figure 2 This is a structural diagram of the automatic adjustment device of the pumping unit belt from another perspective; Figure 3 This is another structural diagram of the automatic adjustment device of the oil pumping unit belt.

[0017] Explanation of the accompanying drawings: 100, base; 110, guide rail; 120, first mounting bracket; 130, protective cover; 140, limit member; 150, third mounting bracket; 200, slide; 210, active slide; 211, second mounting bracket; 220, driven slide; 230, limit switch; 240, mounting hole; 300, actuator; 310, driving member; 320, winding mechanism; 330, second traction member; 340, sensor; 400, adjustment assembly; 410, elastic member; 420, variable force wheel mechanism; 430, first traction member. DETAILED DESCRIPTION

[0018] The present invention will be further described in detail below with reference to the accompanying drawings.

[0019] This specific embodiment is merely an explanation of the present invention and is not intended to limit the present invention. After reading this specification, those skilled in the art may make non-creative modifications to this embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by patent law.

[0020] This embodiment relates to an automatic adjustment device for the belt of an oil pumping unit. Figure 1-Figure 3 , including: a base 100, a slide 200, an execution component 300 and an adjustment component 400.

[0021] A guide rail 110 is arranged parallel to the base 100. Guide rail 110 extends along the direction of motor belt tensioning, providing precise linear guidance for the movement of the slide 200. This ensures that the slide 200 can only move in the axial direction of the tension adjustment, preventing uneven belt force or adjustment failure caused by offset. Specifically, the base 100 is connected to the main structure of the pumping unit via bolts or welding, providing stable support for the actuator 300, adjustment assembly 400, and other components, ensuring stable force transmission during the adjustment process. The horizontal surface of the slide 200 is used to firmly mount the motor. As the slide 200 slides axially, it simultaneously drives the motor axially to adjust the tension of the motor belt. The actuator 300 is mounted between the slide 200 and the base 100 to drive the slide 200 axially along the guide rail 110 to set the initial tension of the motor belt. When installing or replacing the belt, the actuator 300 pulls the slide 200 to move the belt to the target tension state. The adjustment assembly 400 is rotatably mounted on one end of the base 100, and one end of the adjustment assembly 400 is connected to the other end of the base 100, and the other end is connected to the slide 200. The adjustment assembly 400 is provided with an elastic member 410. When the actuator 300 pulls the slide 200, the slide 200 slides and stretches the elastic member 410 in the adjustment assembly 400 to generate tension. The rotational assembly of the adjustment assembly 400 allows it to change the force angle as the slide 200 moves, ensuring that the tension of the elastic member 410 is always transmitted in the direction of the motor belt tensioning. Therefore, when the operator drives the actuator 300 to rotate in one direction, it drives the slide 200 to move in one direction along the guide rail 110. The sliding of the slide 200 drives the elastic member 410 of the adjustment assembly 400 to be stretched and store a constant force equivalent to the target tension of the motor belt. When the motor belt becomes loose due to wear, thermal expansion, or contraction, its actual tension is less than the target tension. The elastic member 410 releases a constant force through the adjustment assembly 400, which then pulls the slide 200 in the opposite direction, automatically adjusting and tightening the motor belt so that the constant force of the adjustment assembly 400 is always equivalent to the target tension of the motor belt, maintaining a constant tension and reducing slippage, wear, and energy consumption. Therefore, the elastic member 410 pulls the adjustment assembly 400 to achieve dynamic balance of the motor belt tension, and automatic adjustment can be achieved without the need for a motor drive. The overall structure of the device is simple, operation is simple, and the failure rate is extremely low. Furthermore, it can reduce belt consumption, reduce costs, increase liquid production, and extend the service life of the belt, thereby reducing the labor intensity of workers.

[0022] In this embodiment, referring to Figure 1The slide 200 includes an active slide 210 and a driven slide 220. The active slide 210 is slidably assembled on one side of the guide rail 110 for assembly of the actuator 300 and the adjustment assembly 400. The active slide 210 serves as the receiving end of the driving force. When the actuator 300 pulls the active slide 210 to move along the guide rail 110, it drives the motor to complete the initial tension setting. The active slide 210 is hinged to the other end of the adjustment assembly 400, and the elastic member 410 is stretched to store energy under the drive of the actuator 300. The driven slide 220 is slidably assembled on the other side of the guide rail 110, forming a front and rear support structure with the active slide 210. Furthermore, both the active slide 210 and the driven slide 220 are provided with elliptical long strip mounting holes 240 to adapt to motors of various models. The mounting hole 240 is firmly mounted to the motor through fasteners (not shown). When the motor models and sizes are different, by changing the distance between the active slide 210 and the driven slide 220 and cooperating with the mounting hole 240, a stable installation of motors of various models can be achieved. In some embodiments, the mounting hole 240 can also be rectangular or polygonal.

[0023] In this embodiment, referring to Figure 2The adjustment assembly 400 includes an elastic member 410, a variable force wheel mechanism 420, and a first pulling member 430. One end of the elastic member 410 is detachably mounted on the side of the base 100 near the driven slide 220, while the other end is free. The elastic member 410 stores mechanical energy equivalent to the target tension through tensile deformation. Specifically, one end of the elastic member 410 is detachably connected to the base 100 via a bolt (not shown), allowing replacement of elastic members 410 with varying stiffness to accommodate varying motor power. In other embodiments, one end of the elastic member 410 can be detachably mounted to the base 100 via other structures. Specifically, in this embodiment, the elastic member 410 is a constant force spring. In other embodiments, the elastic member 410 can also be a rubber spring, a rubber block, an elastic metal sheet, or a gas spring. The variable force wheel mechanism 420 is rotatably mounted on the end of the base 100 away from the elastic member 410. The radius of curvature of the wheel rim groove of the variable force wheel mechanism 420 changes with the rotation angle, thereby varying the moment arm of the pulling member. Specifically, the variable force wheel mechanism 420 is an eccentric gear. For example, when the eccentric gear has a minor axis radius of 30 mm and a major axis radius of 50 mm, when the tension of the elastic member 410 decreases from 600 N to 500 N due to deformation, the eccentric gear rotates to increase the lever arm from 30 mm to 50 mm. Based on the principle of leverage, the output force remains constant at 500 N. In some embodiments, the variable force wheel mechanism 420 may also be a cam structure or a slider crank mechanism. One end of the first traction member 430 is connected to the free end of the elastic member 410, and the other end is connected to the active slide 210. The first traction member 430 is meshed with the variable force wheel mechanism 420 for transmission. Specifically, the first traction member 430 is a chain that meshes with the teeth of the variable force wheel mechanism 420. When the variable force wheel mechanism 420 rotates, the tension of the first traction member 430 changes with the projected length of the eccentricity, achieving a variable force effect. In some embodiments, the first traction member 430 may also be a toothed belt or a toothed steel belt.

[0024] In order to achieve dynamic adjustment of motor belt tension, refer to Figure 1 , the actuator 300 pulls the active slide 210 forward along the guide rail 110, and the first traction member 430 drives the free end of the elastic member 410 to stretch. At this time, the first traction member 430 revolves around the variable force wheel mechanism 420. The variable force wheel mechanism 420 rotates due to the pulling force of the first traction member 430, and its eccentric structure changes the length of the force arm, so that the tensile force of the elastic member 410 and the target tension of the motor belt form a linear mapping. When the motor belt wears and becomes loose, causing the tension to decrease, the elastic member 410 releases the stored energy and pulls the active slide 210 backward through the first traction member 430. The variable force wheel mechanism 420 rotates in the opposite direction with the first traction member 430, and its force arm is automatically adjusted to offset the force attenuation during the spring deformation process, so that the tension output to the active slide 210 remains constant.

[0025] In this embodiment, a first mounting bracket 120 is provided on the base 100. This bracket is welded to the base 100 and provides rigid support for the variable force wheel mechanism 420. A fixed shaft (not shown) is provided on the first mounting bracket 120 to allow the variable force wheel mechanism 420 to rotate and mate. Specifically, a bearing is provided within the variable force wheel mechanism 420 to allow the variable force wheel mechanism 420 to be rotatably assembled on the fixed shaft.

[0026] In this embodiment, referring to Figure 2 and Figure 3 The actuator 300 includes a driving member 310, a winding mechanism 320, and a second traction member 330. One end of the driving member 310 is rotatably mounted on the side of the active slide 210 facing the driven slide 220, and the other end is a free end, extending outward to the outside of the guide rail 110, so that the operator can hold it and perform a rotational movement. Specifically in the present embodiment, the driving member 310 is a rotating handle, and the rotating handle is integrally bent and formed. In some embodiments, the driving member 310 can also be a handwheel, a knob, or an electric rotary motor. The winding mechanism 320 is mounted on the side of the active slide 210 facing the driven slide 220, and is transmission-connected to one end of the driving member 310, driving the driving member 310 to rotate while driving the winding mechanism 320 to rotate. Specifically in the present embodiment, the winding mechanism 320 is a reel. In some embodiments, the winding mechanism 320 can also be a sprocket or a pulley set. One end of the second pulling member 330 is connected to the side of the base 100 near the elastic member 410, and the other end is connected to the winding mechanism 320. When the winding mechanism 320 rotates, the second pulling member 330 is wound or released, driving the active slide 210 to slide axially along the guide rail 110. Specifically, in this embodiment, the second pulling member 330 is a chain. In some embodiments, the second pulling member 330 can also be a toothed belt or a toothed steel belt.

[0027] In order to generate and store a constant force equivalent to the motor belt target tension by the adjustment assembly 400, refer to Figure 1 The operator holds the driving member 310 and rotates it in one direction, converting human power or external power into rotational motion, driving the winding mechanism 320 to rotate synchronously. The winding mechanism 320 reels in the second traction member 330. The winding action generates a pulling force, pulling the active slide 210 to slide forward along the guide rail 110. When the active slide 210 slides, it pushes the driven slide 220 to slide synchronously. At the same time, the variable force wheel mechanism 420 is driven to rotate through the first traction member 430. When the variable force wheel mechanism 420 rotates, it pulls the elastic member 410 to stretch and deform, converting kinetic energy into elastic potential energy for storage. At the same time, the reaction force of the elastic member 410 is fed back to the active slide 210 through the variable force wheel mechanism 420 and the first traction member 430, forming a dynamic balance of force.

[0028] In this embodiment, referring to Figure 3A second mounting bracket 211 is provided on the side of the active slide 210 facing the driven slide 220. The second mounting bracket 211 serves as a mounting carrier for the driver 310 and stably secures the driver 310 to the active slide 210 via a mechanical structure (not shown). Specifically, the mechanical structure may be a shaft hole or a bearing hole, etc., for rotatably mounting the driver 310.

[0029] In this embodiment, referring to Figure 2 , the actuator 300 also includes a sensor 340. The sensor 340 is arranged between the base 100 and the second traction member 330, and is used to detect the tension value borne by the second traction member 330. When the winding mechanism 320 reels or releases the second traction member 330, the second traction member 330 will generate tension due to the stretching or resetting of the elastic member 410. The sensor 340 directly obtains the real-time value of the tension by measuring the tension of the traction member on the base 100. Specifically, a third mounting bracket 150 is also provided on the base 100 for fixed assembly of one end of the sensor 340. Specifically, in the present embodiment, the sensor 340 is a tension sensor. In some embodiments, the sensor 340 can also be a tension sensor, etc.

[0030] In this embodiment, the base 100 also includes a protective cover 130, which is a dustproof corrugated cover. There are multiple protective covers 130, and the multiple protective covers 130 are respectively mounted on the guide rail 110. The protective cover 130 can be telescopically deformed when sliding with the slide 200, which can prevent dust, water molecules or other debris from falling into the guide rail 110, thereby increasing the friction between the guide rail 110 and the slide 200, and even causing the guide rail 110 to rust or break. The two ends of the protective cover 130 are fixedly connected to the base 100 and the slide 200 respectively to prevent the guide rail 110 from leaking out when the protective cover 130 is telescopic. Specifically, the protective cover 130 is made of an elastic material, such as nitrile rubber or polyurethane. In some embodiments, the protective cover 130 can also be an accordion protective cover.

[0031] In this embodiment, referring to Figure 1 and Figure 2 A limit switch 230 is provided on the slide 200. Specifically, the limit switch 230 is electrically connected to the electrical control cabinet. A limit member 140 is provided on the side of the base 100 facing the slide 200, which cooperates with the limit switch 230. When the belt breaks, the slide 200 moves to the limit position, and the trigger rod of the limit switch 230 rigidly contacts the limit member 140, instantly cutting off the power supply to the servo motor, preventing energy loss due to idling when the belt breaks. Specifically, a mounting slot (not shown) is provided on the slide 200 for securing the limit switch 230.

[0032] The above is only used to illustrate the technical solution of the present invention and is not intended to limit it. Other modifications or equivalent substitutions made to the technical solution of the present invention by ordinary technicians in this field should be included in the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solution of the present invention.

Claims

1. An automatic adjustment device for an oil pumping unit belt, characterized in that: include: The base (100) is provided with a guide rail (110) extending along the tensioning direction of the motor belt; A slide seat (200) is slidably mounted on the guide rail (110) and is used for assembling the electric motor; an actuator (300) assembled between the slide (200) and the base (100), the actuator (300) being used to drive the slide (200) to move axially along the guide rail (110); as well as an adjusting component (400) rotatably assembled on one end of the base (100), one end of the adjusting component (400) being connected to the other end of the base (100), and the other end being connected to the slide seat (200), and the adjusting component (400) being provided with an elastic member (410); When the actuator (300) drives the slide (200) to move in one direction, the elastic member (410) of the adjustment assembly (400) is stretched and stores a constant force equivalent to the target tension force of the motor belt; When the actual tension of the motor belt is less than the target tension, the elastic member (410) releases the constant force through the adjustment assembly (400) and pulls the slide seat (200) to move in the opposite direction to maintain the constant tension of the motor belt.

2. The automatic adjustment device for the pumping unit belt according to claim 1, characterized in that: The slide (200) includes: an active slide (210) slidably assembled on the guide rail (110) for assembling the actuator assembly (300) and the adjustment assembly (400); and a driven slide (220) slidably assembled on the guide rail (110) and cooperating with the active slide (210).

3. The automatic adjustment device for the pumping unit belt according to claim 2, characterized in that: The adjustment assembly (400) comprises: an elastic member (410) having one end detachably mounted on one end of the base (100) and the other end being a free end; a variable force wheel mechanism (420) rotatably mounted on the base (100) away from one end of the elastic member (410); and a first traction member (430) having one end connected to the free end of the elastic member (410) and the other end connected to the active slide (210) and engaged with the variable force wheel mechanism (420).

4. The automatic adjustment device for the pumping unit belt according to claim 3, characterized in that: The base (100) is provided with a first mounting frame (120) for rotating and arranging the variable force wheel mechanism (420).

5. The automatic adjustment device for the pumping unit belt according to claim 3, characterized in that: The actuator assembly (300) comprises: a driving member (310) having one end rotatably mounted on the active slide (210) and the other end extending outwardly to form a free end; a winding mechanism (320) disposed on the active slide (210) and transmission-connected to the driving member (310); and a second traction member (330) having one end connected to a side of the base (100) close to the elastic member (410) and the other end connected to the winding mechanism (320); The driving member (310) is driven to rotate, thereby driving the winding mechanism (320) to reel in the second traction member (330), and at the same time driving the active slide (210) to slide. The active slide (210) slides through the first traction member (430), driving the variable force wheel mechanism (420) to rotate and pulling the elastic member (410) to stretch and deform.

6. The automatic adjustment device for the oil pumping unit belt according to claim 5, characterized in that: A second mounting bracket (211) for rotationally assembling the driving member (310) is provided on one side of the active sliding seat (210) facing the driven sliding seat (220).

7. The automatic adjustment device for the pumping unit belt according to claim 5, characterized in that: The execution component (300) further includes a sensor (340) disposed between the base (100) and the second traction member (330).

8. The automatic adjustment device for the oil pumping unit belt according to claim 1, characterized in that: The base (100) further includes: a plurality of protective covers (130) which are sleeved on the guide rail (110).

9. The automatic adjustment device for the oil pumping unit belt according to claim 1, characterized in that: A limit switch (230) is provided on the slide seat (200), and a limit member (140) cooperating with the limit switch (230) is provided on a side of the base (100) facing the slide seat (200).

10. The automatic adjustment device for the oil pumping unit belt according to claim 1, characterized in that: The slide seat (200) is also provided with a mounting hole (240) for assembling the power supply unit.

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