Automatic belt adjusting device for pumping unit

Abstract

The utility model relates to a pumping unit belt automatic adjusting device, it relates to pumping unit technical field. It contains: the base is equipped with guide rail, the slide is slidably assembled on the guide rail, is used for motor assembly, the execution component is assembled between the slide and the base, and the execution component is used to drive the slide and moves along the guide rail axial direction, and the adjusting component rotation assembly one end of the base, and the adjusting component is provided with elastic part, when the execution component drive slide moves to one direction, the elastic part of adjusting component is stretched and stores the constant force equivalent with motor belt target tension, when the actual tension of motor belt relaxation is less than target tension, the elastic part releases the constant force through adjusting component and pulls the slide and moves to the opposite direction, to maintain motor belt tension constant. Adopt above technical scheme, compared with existing adjusting device, need not motor drive adjustment, has can realize the dynamic self -adjusting of belt tension, simple operation, failure rate is extremely low, and the consumption of belt is reduced, and the liquid production is increased.

Description

Technical Field

[0001] This utility model relates to the field of oil pumping unit technology, specifically to an automatic belt adjustment device for an oil pumping unit. Background Technology

[0002] In the field of oil pumping units, as the core equipment for oilfield production, the transmission system of the pumping unit generally adopts a belt drive structure, which connects the motor drive pulley and the pumping unit driven pulley to transmit power. However, the physical properties of the belt material determine that its length will increase due to elastic decay during long-term operation. If the relative positions of the drive pulley and the driven pulley are fixed, the slack belt will directly affect the power transmission efficiency. Moreover, if the belt breaks at night, and no one is watching, the machine cannot be stopped after the belt breaks, and will continue to run idling, wasting a lot of electrical energy.

[0003] The natural slack caused by reduced belt elasticity is a common problem in the industry. Existing pumping unit belt tensioning adjustment solutions mainly rely on electric drive devices to move the motor base and mechanically tighten the belt. This type of solution has inherent drawbacks: the adjustment motor requires a complex circuit system, and long-term operation is prone to circuit failures, motor jamming, and other problems, leading to the failure of the tensioning adjustment function. In cases of electric adjustment device failure or initial installation, manual adjustment of the motor position or tension bolts is still required. This process requires multiple people and specialized tools, is time-consuming and labor-intensive, and the accuracy of manual adjustment depends on experience, which can easily lead to uneven tension or over-tensioning. Moreover, the inefficiency of manual adjustment directly prolongs belt replacement time, shortens effective production time, and affects oilfield output. Utility Model Content

[0004] The purpose of this utility model is to address the defects and deficiencies of the existing technology by providing an automatic belt adjustment device for oil pumping units, which solves at least one of the above-mentioned technical problems. It does not require motor-driven adjustment, has the advantages of dynamic self-adjustment of belt tension, simple operation, extremely low failure rate, reduced belt consumption, increased liquid production, and reduced labor intensity of workers.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is: an automatic belt adjustment device for an oil pumping unit, comprising:

[0006] The base has a guide rail extending along the tension direction of the motor belt;

[0007] A slide block, slidably mounted on the guide rail, is used for power supply assembly;

[0008] An actuating component, assembled between the slide and the base, is used to drive the slide to move axially along the guide rail; and

[0009] An adjustment component is rotatably mounted on one end of the base. One end of the adjustment component is connected to the other end of the base, and the other end is connected to the slide. The adjustment component is provided with an elastic element.

[0010] When the actuator drives the slide to move in one direction, the elastic element of the adjusting component is stretched and stores a constant force equivalent to the target tension of the motor belt;

[0011] When the actual tension of the slack motor belt is less than the target tension, the elastic element releases a constant force through the adjustment component and pulls the slide block to move in the opposite direction to maintain a constant motor belt tension.

[0012] The present invention further comprises: an active slide that is slidably mounted on the guide rail for assembling the actuating component and the adjusting component, and a driven slide that is slidably mounted on the guide rail and cooperates with the active slide.

[0013] The present invention further provides that the adjustment component includes: an elastic member with one end detachably mounted to one end of the base and the other end being a free end; a variable force wheel mechanism rotatably mounted on the base at the end away from the elastic member; and a first traction member with one end connected to the free end of the elastic member, the other end connected to the active slide, and meshing with the variable force wheel mechanism.

[0014] The present invention further includes a first mounting bracket on the base for rotating and assembling the variable force wheel mechanism.

[0015] The present invention further provides that the execution component includes: a driving member with one end rotatably mounted on the active slide and the other end extending outward as a free end; a winding mechanism disposed on the active slide and transmittedly connected to the driving member; and a second traction member with one end connected to the side of the base near the elastic member and the other end connected to the winding mechanism.

[0016] The drive component is driven to rotate, which in turn causes the winding mechanism to wind up the second traction component. At the same time, the active slide block is driven to slide. The sliding of the active slide block drives the variable force wheel mechanism to rotate through the first traction component and pulls the elastic component to stretch and deform.

[0017] The present invention further includes a second mounting bracket provided on the side of the active slide facing the driven slide for rotatably assembling the driving component.

[0018] The present invention further includes, in that the execution component, a sensor disposed between the base and the second traction member.

[0019] The present invention further includes, in that the base, a plurality of protective sleeves are provided and fitted onto the guide rail.

[0020] The present invention further includes a limit switch on the slide block, and a limiting element that cooperates with the limit switch is provided on the side of the base facing the slide block.

[0021] The present invention further includes a mounting hole on the slide for assembling a power supply motor.

[0022] The beneficial effects of this utility model after adopting the above technical solution are as follows: In this utility model, by providing an execution component and an adjustment component, wherein the adjustment component is equipped with an elastic element, when the execution component is driven to rotate in one direction, it drives the slide to move along the guide rail in one direction. The sliding of the slide causes the elastic element of the adjustment component to be stretched and store a constant force equivalent to the target tension of the motor belt. When the actual tension of the slack motor belt is less than the target tension, the elastic element releases the constant force through the adjustment component, pulling the slide to move in the opposite direction to tighten the motor belt, ensuring that the constant force of the adjustment component is always equivalent to the target tension of the motor belt. Therefore, compared with existing automatic adjustment devices, it eliminates the need for motor-driven adjustment, achieves 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. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the automatic belt adjustment device for an oil pumping unit;

[0025] Figure 2 This is a schematic diagram of the automatic belt adjustment device for an oil pumping unit from another perspective;

[0026] Figure 3 This is another schematic diagram of the automatic belt adjustment device for oil pumping units.

[0027] Explanation of reference numerals in the attached drawings: 100, base; 110, guide rail; 120, first mounting bracket; 130, protective sleeve; 140, limiting element; 150, third mounting bracket; 200, slide; 210, active slide; 211, second mounting bracket; 220, driven slide; 230, limit switch; 240, mounting hole; 300, actuating component; 310, driving component; 320, winding mechanism; 330, second traction component; 340, sensor; 400, adjusting component; 410, elastic element; 420, variable force wheel mechanism; 430, first traction component. Detailed Implementation

[0028] The present invention will be further described in detail below with reference to the accompanying drawings.

[0029] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive element, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

[0030] This embodiment relates to an automatic belt adjustment device for an oil pumping unit, as described in the following reference. Figures 1-3 It includes: a base 100, a slide 200, an actuation component 300, and an adjustment component 400.

[0031] The base 100 has a parallel guide rail 110 extending along the tension direction of the motor belt, 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 tension or adjustment failure caused by misalignment. Specifically, the base 100 is connected to the main structure of the pumping unit by bolts or welding, providing stable support for the actuator 300, adjustment assembly 400, etc., ensuring the stability of force transmission during adjustment. The horizontal side of the slide 200 is used for the stable installation of the motor. As the slide 200 slides axially, it drives the motor to move axially to adjust the tension of the motor belt. The actuator 300 is installed between the slide 200 and the base 100 to drive the slide 200 to move axially along the guide rail 110, thus setting the initial tension of the motor belt. When installing or replacing the belt, the actuator 300 pulls the slide 200 to move, bringing the belt to the target tension state. The adjusting component 400 is rotatably mounted on one end of the base 100, thereby connecting one end of the adjusting component 400 to the other end of the base 100, and the other end to the slide 200. The adjusting component 400 is provided with an elastic element 410. During the pulling of the slide 200 by the actuating component 300, the slide 200 slides and stretches the elastic element 410 in the adjusting component 400 to generate tension. The rotatable assembly of the adjusting component 400 allows it to change the force angle as the slide 200 moves, ensuring that the tension of the elastic element 410 is always transmitted along the tension direction of the motor belt. Therefore, when the operator drives the actuating component 300 to rotate in one direction, it causes the slide 200 to move along the guide rail 110 in one direction. The sliding of the slide 200 stretches the elastic element 410 of the adjusting component 400, storing a constant force equivalent to the target tension of the motor belt. When the motor belt loosens due to wear, thermal expansion and contraction, etc., its actual tension is less than the target tension. The elastic element 410 releases a constant force through the adjusting component 400, which in turn pulls the slide 200 in the opposite direction, automatically adjusting the tension of the motor belt. This ensures that the constant force of the adjusting component 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 dynamic balance of the motor belt tension is achieved by the elastic element 410 pulling the adjusting component 400. Furthermore, automatic adjustment can be achieved without a motor drive. The device has a simple overall structure, is easy to operate, has an extremely low failure rate, and reduces belt consumption, lowering costs while increasing liquid production and extending belt life, thus reducing the labor intensity of workers.

[0032] In this embodiment, refer to Figure 1The slide 200 includes an active slide 210 and a driven slide 220. The active slide 210 is slidably mounted 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 along the guide rail 110, it drives the motor to complete the initial tension setting. The other end of the active slide 210 is hinged to the adjustment assembly 400, and under the drive of the actuator 300, it stretches the elastic element 410 to store energy. The driven slide 220 is slidably mounted on the other side of the guide rail 110, forming a front-rear support structure with the active slide 210. Furthermore, both the active slide 210 and the driven slide 220 are provided with elliptical mounting holes 240 to accommodate motors of various models. The mounting holes 240 are securely installed to the motor using 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 may also be rectangular or polygonal.

[0033] In this embodiment, refer to Figure 2The adjusting assembly 400 includes an elastic element 410, a variable force wheel mechanism 420, and a first traction member 430. One end of the elastic element 410 is detachably mounted on the side of the base 100 near the driven slide 220, while the other end is a free end. The elastic element 410 stores mechanical energy equivalent to the target tension force through tensile deformation. Specifically, one end of the elastic element 410 is detachably connected to the base 100 by a bolt (not shown), and elastic elements 410 with different stiffnesses can be replaced according to different motor power. In other embodiments, one end of the elastic element 410 can also be detachably assembled to the base 100 through other structures. Specifically, in this embodiment, the elastic element 410 is a constant force spring. In some embodiments, the elastic element 410 can also be a rubber spring, a rubber block, an elastic metal sheet, or a gas spring, etc. The variable force wheel mechanism 420 is rotatably mounted on the end of the base 100 away from the elastic element 410. The radius of curvature of the wheel flange groove of the variable force wheel mechanism 420 changes with the rotation angle, thereby changing the lever arm of the traction member. Specifically, the variable force wheel mechanism 420 is an eccentric gear. For example, when the minor axis radius of the eccentric gear is 30mm and the major axis radius is 50mm, when the tension of the elastic element 410 decreases from 600N to 500N due to deformation, the eccentric gear rotates to increase the lever arm from 30mm to 50mm. According to the lever principle, the output force remains constant at 500N. In some embodiments, the variable force wheel mechanism 420 can also be a cam structure or a crank-slider mechanism, etc. One end of the first traction member 430 is connected to the free end of the elastic element 410, and the other end is connected to the active slide 210. The first traction member 430 meshes 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, etc.

[0034] To achieve dynamic adjustment of the 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 stretches the free end of the elastic member 410. At this time, the first traction member 430 revolves around the variable force wheel mechanism 420, which rotates due to the pulling force of the first traction member 430. Its eccentric structure changes the lever arm length, making the tensile force of the elastic member 410 linearly mapped to the target tension of the motor belt. When the motor belt wears and loosens, causing the tension to decrease, the elastic member 410 releases its stored energy, pulling 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 lever arm automatically adjusts to offset the force attenuation during the spring deformation process, keeping the pulling force output to the active slide 210 constant.

[0035] In this embodiment, a first mounting bracket 120 is provided on the base 100. The first mounting bracket 120 is fixed to the base 100 by welding, providing rigid support for the variable force wheel mechanism 420. A fixed shaft (not shown) is provided on the first mounting bracket 120 for the variable force wheel mechanism 420 to rotate and be mounted. Specifically, a bearing is provided inside the variable force wheel mechanism 420 for the variable force wheel mechanism 420 to be rotatably mounted on the fixed shaft.

[0036] In this embodiment, refer to Figure 2 and Figure 3 The execution component 300 includes a drive member 310, a winding mechanism 320, and a second traction member 330. One end of the drive 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 for the operator to hold and rotate. Specifically, in this embodiment, the drive member 310 is a rotating handle, which is integrally bent. In some embodiments, the drive member 310 may 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 drively connected to one end of the drive member 310, driving the drive member 310 to rotate while simultaneously driving the winding mechanism 320 to rotate. Specifically, in this embodiment, the winding mechanism 320 is a drum. In some embodiments, the winding mechanism 320 may also be a sprocket or a pulley block. One end of the second traction 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, it winds or releases the second traction member 330, causing the active slide 210 to slide axially along the guide rail 110. Specifically, in this embodiment, the second traction member 330 is a chain. In some embodiments, the second traction member 330 may also be a toothed belt or a toothed steel belt, etc.

[0037] In order to generate and store a constant force equivalent to the target tension of the motor belt using the regulating component 400, refer to Figure 1 The operator holds the drive component 310 and rotates it in one direction, converting human or external power into rotational motion, which drives the winding mechanism 320 to rotate synchronously. The winding mechanism 320 winds up the second traction component 330. The winding action generates tension, which pulls 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 first traction component 430 drives the variable force wheel mechanism 420 to rotate. When the variable force wheel mechanism 420 rotates, it pulls the elastic component 410 to stretch and deform, converting kinetic energy into elastic potential energy for storage. At the same time, the reaction force of the elastic component 410 is fed back to the active slide 210 through the variable force wheel mechanism 420 and the first traction component 430, forming a dynamic balance of forces.

[0038] In this embodiment, refer 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 the mounting carrier for the drive component 310 and stably fixes the drive component 310 to the active slide 210 through a mechanical structure (not shown). Specifically, the mechanical structure can be a shaft hole or a bearing hole, etc., to allow the drive component 310 to rotate and assemble.

[0039] In this embodiment, refer to Figure 2 The execution component 300 also includes a sensor 340. The sensor 340 is disposed 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 winds up 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 force by measuring the tension force exerted by the traction member on the base 100. Specifically, a third mounting bracket 150 is also provided on the base 100 for fixing one end of the sensor 340. Specifically, in this embodiment, the sensor 340 is a tension sensor. In some embodiments, the sensor 340 may also be a tension sensor, etc.

[0040] In this embodiment, the base 100 also includes a protective sleeve 130, which is a dustproof corrugated sleeve. Multiple protective sleeves 130 are provided, and each sleeve is fitted onto the guide rail 110. The protective sleeve 130 can expand and contract as the slide block 200 slides, preventing 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 block 200, and potentially causing the guide rail 110 to rust or break. Both ends of the protective sleeve 130 are fixedly connected to the base 100 and the slide block 200 respectively to prevent the guide rail 110 from being exposed when the protective sleeve 130 expands or contracts. Specifically, the protective sleeve 130 is made of an elastic material, such as nitrile rubber or polyurethane. In some embodiments, the protective sleeve 130 can also be an accordion cover, etc.

[0041] In this embodiment, refer to Figure 1 and Figure 2 A limit switch 230 is installed on the slide 200. Specifically, the limit switch 230 is electrically connected to the electrical control cabinet. A limiting element 140, which cooperates with the limit switch 230, is provided on the side of the base 100 facing the slide 200. When the belt breaks, the slide 200 moves to its extreme position, and the trigger rod of the limit switch 230 rigidly contacts the limiting element 140. The limit switch 230 instantly cuts off the power to the servo motor, preventing energy waste due to idling when the belt breaks. Specifically, the slide 200 is provided with a mounting groove (not shown) for the fixed assembly of the limit switch 230.

[0042] The above is only used to illustrate the technical solution of this utility model and not to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, should be covered within the scope of the claims of this utility model.

Claims

1. An automatic belt adjustment device for an oil pumping unit, characterized in that, include: The base (100) has a guide rail (110) extending along the tension direction of the motor belt; The slide (200) is slidably mounted on the guide rail (110) for power supply assembly; An actuation component (300) is assembled between the slide (200) and the base (100), and the actuation component (300) is used to drive the slide (200) to move axially along the guide rail (110); as well as An adjustment component (400) is rotatably mounted on one end of the base (100). One end of the adjustment component (400) is connected to the other end of the base (100), and the other end is connected to the slide (200). The adjustment component (400) is provided with an elastic element (410). When the actuator (300) drives the slide (200) to move in one direction, the elastic element (410) of the adjusting assembly (400) 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 element (410) releases a constant force through the adjusting component (400) and pulls the slide (200) to move in the opposite direction to maintain a constant motor belt tension.

2. The automatic belt adjustment device for an oil pumping unit according to claim 1, characterized in that, The slide (200) includes: an active slide (210) slidably mounted on the guide rail (110) for mounting the actuation component (300) and the adjustment component (400), and a passive slide (220) slidably mounted on the guide rail (110) and cooperating with the active slide (210).

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

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

5. The automatic belt adjustment device for an oil pumping unit according to claim 3, characterized in that, The execution component (300) includes: a drive member (310) with one end rotatably mounted on the active slide (210) and the other end extending outward as a free end; a winding mechanism (320) disposed on the active slide (210) and pulsatorically connected to the drive member (310); and a second traction member (330) with one end connected to the side of the base (100) near the elastic member (410) and the other end connected to the winding mechanism (320). The drive member (310) is driven to rotate, which in turn drives the winding mechanism (320) to wind up the second traction member (330) and simultaneously drives the active slide (210) to slide. The active slide (210) slides through the first traction member (430) to drive the variable force wheel mechanism (420) to rotate and pull the elastic member (410) to stretch and deform.

6. The automatic belt adjustment device for an oil pumping unit according to claim 5, characterized in that, The active slide (210) is provided with a second mounting bracket (211) on the side facing the driven slide (220) for rotating assembly of the drive member (310).

7. The automatic belt adjustment device for an oil pumping unit 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 belt adjustment device for an oil pumping unit according to claim 1, characterized in that, The base (100) further includes: a plurality of protective sleeves (130) provided and fitted onto the guide rail (110).

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

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

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