Belt replacement auxiliary device

Abstract

The utility model relates to the technical field of maintenance of belt transmission systems, in particular to a belt replacement auxiliary device which comprises a support, two belt wheels, an electric adjusting mechanism and a controller, the two belt wheels are arranged in the length direction of the support at intervals, and at least one belt wheel is movably assembled with the support. The electric adjusting mechanism is arranged on the side, back to the belt wheels, of the support and used for driving a wheel shaft of at least one belt wheel to move in the length direction of the support. The controller is in control connection with the electric adjusting mechanism and controls the electric adjusting mechanism to act. The belt is forcibly stripped or installed by using tools such as a crowbar and a wrench instead of manual work through the electric adjusting mechanism, operation can be carried out by a single person, the automation degree is higher, the safety in the replacement process is improved, the complexity in the replacement process is reduced, and the labor cost is saved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the maintenance technical field of belt drive system, concretely relates to a belt replacement auxiliary device. BACKGROUND

[0002] As an important form of mechanical transmission, the belt drive is widely used in engine, compressor, conveying line and other equipment due to its simple structure, low cost, buffering and vibration absorption advantages. However, the belt needs to be replaced regularly due to wear and tear, aging and other problems after long-term operation. The safety and efficiency problems existing in the traditional replacement process have become a technical difficulty to be solved in the field.

[0003] In the belt drive system in the industrial and civil fields, the pulley is usually fixedly installed on the rack or the equipment main body through bearings, bolts and other components, and its relative position remains constant during normal operation. In the prior art, in order to optimize the transmission efficiency and prolong the service life of the belt, sensors are usually used to monitor the tension, speed, temperature and other parameters of the belt in real time, and intelligent algorithms are used to dynamically adjust the speed of the pulley or the pressure of the tension pulley. Although such technology can accurately control the state of the belt during operation, it still relies on manual operation during belt replacement. The specific process is as follows:

[0004] 1. Disassembly of failed belt: when the sensor warns that the belt is failed (such as abnormal tension, temperature overrun), the machine needs to be stopped for replacement. Since the position of the pulley is fixed, the maintenance personnel need to use a crowbar, wrench and other tools to manually peel off the failed belt from the groove of the pulley. During this process, the elastic potential energy generated by the long-term tension of the belt may cause sudden rebound, even driving the pulley to rotate temporarily, forming a safety hazard.

[0005] 2. Lack of safety protection, high risk of winding and clamping: the fixed structure and inertia characteristics of the pulley form a safety blind area. When the belt suddenly breaks, the elastic force at the moment of breakage may cause the pulley to reverse momentarily; or during installation, due to uneven belt tension, the pulley may suddenly rotate, and the hands of the maintenance personnel are near the wheel groove (the typical operating posture is one hand holding the wheel and the other hand pulling the belt), which is easy to be wound in.

[0006] 3. Parameter judgment lag, assembly quality unstable: manual judgment of whether the belt is installed in place relies on experience rather than accurate data. For example, when judging the tension by "pulling the belt to feel tight", the error is large, which may cause the tension to be too large (accelerating wear) or too small (belt slipping), affecting the subsequent service life.

[0007] 4. When disassembling and assembling the belt, it is difficult to align all the wheel grooves and maintain the belt tension at the same time, which requires the cooperation of at least two people, resulting in high labor cost. UTILITY MODEL CONTENTS

[0008] The utility model discloses a purpose at providing a kind of belt replacement auxiliary device, to solve the technical problems of poor safety, complex operation, high labor cost in prior art in replacing belt.

[0009] To solve the above problems, the utility model provides a kind of belt replacement auxiliary device adopts following technical scheme:

[0010] A kind of belt replacement auxiliary device, including support, belt pulley, electric adjusting mechanism and controller;

[0011] The belt pulley is equipped with two, interval arrangement in the length direction of support, and at least one belt pulley is movably assembled with support;

[0012] Electric adjusting mechanism is arranged on the side of support away from belt pulley, and electric adjusting mechanism is used to drive the wheel shaft of at least one belt pulley to move along the length direction of support;

[0013] Controller is controlled connection with electric adjusting mechanism, and controls the action of electric adjusting mechanism.

[0014] The utility model discloses the beneficial effect of belt replacement auxiliary device is: the utility model in use, manually controls electric adjusting mechanism operation through controller, and then drives belt pulley to move, reduces the distance between two belt pulleys, when belt is in a state of slack, one person can directly disassemble damaged belt, and it is also convenient for manually putting on new belt, when the reverse operation of electric adjusting mechanism is controlled through controller, the distance between two belt pulleys can be increased, and the belt can be stretched out and tightened.The utility model replaces manual use crowbar, spanner and other tools to forcibly strip or install belt through electric adjusting mechanism, avoids the security risk caused by the sudden rebound of elastic potential energy of belt or the rotation of belt pulley, improves the security of replacement process, and solves the security risk when manually operating.In addition, electric adjusting mechanism can quickly adjust the distance between belt pulleys, without manually adjusting repeatedly, reduce operating steps, shorten replacement time, reduce labor cost, and improve replacement efficiency.Controller is controlled connection with electric adjusting mechanism, compared with manual experience judgment, can more accurately adjust the position of belt pulley, and lay a foundation for the accurate control of subsequent belt tension.

[0015] Further, two belt pulleys are movably assembled with support, and the wheel shaft of two belt pulleys is driven to move synchronously close or synchronously away by electric adjusting mechanism.

[0016] Beneficial effects: two pulleys are synchronized to approach or move away from each other, so that the forces on both sides of the belt are uniform, avoiding the problem of belt skewing or uneven tension caused by single-sided adjustment, ensuring that the belt is balanced after installation, reducing wear or slipping caused by uneven tension, and prolonging the service life of the belt. Synchronous movement can automatically align the pulley grooves, reducing the difficulty of manual alignment, especially in a multi-pulley transmission system, without the need for multiple people to cooperate to complete the belt positioning, further reducing labor costs and improving operational convenience.

[0017] Further, the electric adjustment mechanism includes a servo motor, a bevel gear assembly, a bidirectional screw, and an adjustment block. The support has an adjustment long hole corresponding to the position of the shaft of each pulley. The adjustment block is provided with two adjustment blocks, and the shaft of each pulley is rotatably assembled on the corresponding adjustment block. The bidirectional screw has two outer threads with opposite screw directions, and the two adjustment blocks are threadedly connected to the two outer threads. The support is provided with a guide shaft parallel to the bidirectional screw, and the two adjustment blocks are slidably connected to the guide shaft. The controller is connected to the servo motor, and the servo motor drives the bidirectional screw to rotate through the bevel gear assembly.

[0018] Beneficial effects: The bidirectional screw cooperates with the outer threads with opposite screw directions to ensure that the two adjustment blocks move synchronously and reversely, and the guide shaft guides the movement to achieve high-precision and deviation-free adjustment of the distance between the pulleys, avoid mechanical transmission errors, and ensure the consistency of the belt tension. The servo motor drives the screw through the bevel gear assembly, which has high transmission efficiency and can accurately control the speed and stroke. The controller realizes programmed adjustment, which can more stably control the moving speed and distance of the pulley than manual operation, preventing the belt from being damaged due to rapid adjustment. The adjustment block is slidably connected to the guide shaft, reducing friction and improving the durability of the mechanism. The overall structure is integrated on the back side of the support, which does not occupy the belt installation space and is convenient for integration with existing equipment.

[0019] Further, the two pulleys are symmetrically arranged on both sides of the servo motor.

[0020] Beneficial effects: The pulleys are symmetrically arranged on both sides of the servo motor, so that the driving force of the motor is evenly transmitted to the pulleys on both sides, avoiding deformation or vibration of the support caused by unilateral force, improving the overall stability of the device, ensuring smooth movement of the pulleys during adjustment, and reducing installation errors caused by vibration. The symmetrical structure facilitates equipment layout and meets the installation requirements in narrow spaces, and can be flexibly applied to different specifications of belt transmission systems.

[0021] Further, the support is provided with two support plates symmetrically arranged on both sides of the servo motor, and the two support plates are located between the two adjustment blocks. The bidirectional screw is rotatably connected to the two support plates, and the guide shaft is fixedly connected to the two support plates.

[0022] Beneficial effect: The support plate fixes the bidirectional screw rod and the guide shaft, provides stable support for the adjusting mechanism, reduces radial shaking when the screw rod rotates, ensures that the belt pulley moves accurately along a straight line during adjustment, avoids adjustment errors caused by structural deformation, and improves the reliability and service life of the device. The support plate, as an independent component, can simplify the production and assembly process, and provide installation reference for servo motors, bevel gears and other components, reducing disassembly difficulty during maintenance.

[0023] Further, the same side of the bracket as the electric adjusting mechanism is also provided with a limiting mechanism, the limiting mechanism comprising at least one limiting block and a limiting switch arranged on the limiting block, the controller being in communication connection with the limiting switch, the controller controlling the servo motor to be closed when the adjusting block contacts the limiting switch, so as to tension the belt.

[0024] Beneficial effect: The limiting mechanism monitors the position of the belt pulley in real time through the limiting block and the limiting switch, and automatically closes the servo motor when reaching the preset tensioning position, avoiding damage to the belt or equipment caused by excessive tensioning, realizing automatic and accurate control of the tensioning force, replacing manual experience judgment, and improving assembly quality stability. The limiting switch is linked with the controller, which can stop immediately after the belt is tensioned in place, preventing the electric adjusting mechanism from overloading, and avoiding safety risks caused by manual misoperation, further enhancing the safety of the device.

[0025] Further, the limiting block is detachably connected with the bracket.

[0026] Beneficial effect: The limiting block can be detachably connected, allowing replacement of the limiting block according to different belt specifications or equipment requirements, adapting to various types of belt drive systems, avoiding the problem of insufficient universality of the device caused by equipment differences, and improving the application range of the device.

[0027] Further, the installation position of the limiting block on the bracket is adjustable.

[0028] Beneficial effect: The belt tensioning force threshold can be finely adjusted by changing the position of the limiting block according to actual needs, meeting the individualized requirements of different loads, speeds or belt types for tensioning, avoiding the problem of excessive or insufficient tension caused by "one-size-fits-all" adjustment, and further optimizing the efficiency and life of the belt drive. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 It is a perspective structural schematic view of the belt replacement auxiliary device of the utility model;

[0030] Figure 2 It is a front view of Figure 1 ;

[0031] Figure 3 It is a top view of Figure 1 ;

[0032] Figure 4 for Figure 1 Side view.

[0033] Explanation of reference numerals in the attached figures:

[0034] 1. Bracket; 2. Pulley; 3. Axle; 4. Adjusting block; 5. Double-acting lead screw; 6. External thread section; 7. Guide shaft; 8. Adjusting elongated hole; 9. Servo motor; 10. Driving bevel gear; 11. Driven bevel gear; 12. Support plate; 13. Limit block; 14. Limit switch; 15. Belt. Detailed Implementation

[0035] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Those skilled in the art should know that the embodiments described below are some embodiments of the present disclosure, but not all embodiments.

[0036] An embodiment of the belt replacement auxiliary device provided by this utility model:

[0037] like Figures 1 to 4 As shown, the belt replacement auxiliary device includes a bracket 1, two pulleys 2, an electric adjustment mechanism, a controller, and a limit mechanism.

[0038] The bracket 1 is a rectangular plate. In this embodiment, for ease of description, the length direction of the bracket 1 is defined as the left-right direction, and the width direction of the bracket 1 is defined as the front-back direction.

[0039] Two pulleys 2 are arranged at intervals in the left-right direction, and the axle 3 of the pulleys 2 extends in the front-back direction. For example... Figure 3 As shown, the bracket 1 has two adjusting holes 8 extending in the left-right direction at the positions corresponding to the two pulleys 2. The two adjusting holes 8 are of the same length and both penetrate the bracket 1. The axles 3 of the two pulleys 2 pass through the corresponding adjusting holes 8 and can slide in the adjusting holes 8, thereby adjusting the distance between the two pulleys 2.

[0040] In this embodiment, as Figure 2As shown, the electric adjusting mechanism is located on the side of the support 1 away from the pulley 2, and can drive the wheel shafts 3 of the two pulleys 2 to automatically move in the adjusting long hole 8. Specifically, the electric adjusting mechanism comprises a servo motor 9, a bevel gear assembly, a bidirectional screw 5, and adjusting blocks 4. The adjusting blocks 4 are provided in two, and the wheel shafts 3 of the two pulleys 2 are respectively rotatably arranged on the corresponding adjusting blocks 4. The bidirectional screw 5 has two outer threaded segments 6 with opposite screw directions, and the two adjusting blocks 4 are respectively threadedly connected with the two outer threaded segments 6. The bevel gear assembly comprises a driving bevel gear 10 and a driven bevel gear 11 which are in mesh with each other, the driving bevel gear 10 is connected with the output shaft of the servo motor 9, and the driven bevel gear 11 is coaxially fixed on the bidirectional screw 5. The two adjusting blocks 4 are symmetrically arranged on the left and right sides of the servo motor 9, and the two pulleys 2 are symmetrically distributed on the left and right sides of the servo motor 9, the wheel grooves are aligned, and the force borne by the belt 15 during installation is ensured to be uniform.

[0041] As shown, the two support plates 12 are fixed on the support 1 on the side away from the pulley 2, are symmetrically arranged on the left and right sides of the servo motor 9, are located between the two adjusting blocks 4, and the bidirectional screw 5 is rotatably arranged with the two support plates 12 through bearings. Figure 4 As shown, a guide shaft 7 is connected between the two support plates 12, the guide shaft 7 is at the same height as the bidirectional screw 5, the guide shaft 7 is parallel to the bidirectional screw 5 in the front-rear direction and is arranged in a spaced manner, and the two adjusting blocks 4 are respectively in sliding fit with the guide shaft 7. The guide shaft 7 limits the adjusting blocks 4 to move only in the length direction of the support 1, and avoids rotation.

[0042] The controller is in control connection with the servo motor 9, the servo motor 9 drives the bidirectional screw 5 to rotate through the bevel gear assembly, the bidirectional screw 5 drives the two adjusting blocks 4 to synchronously approach or synchronously move away when rotating, and then the two pulleys 2 synchronously approach or synchronously move away.

[0043] The support 1 is further provided with a limiting mechanism, the limiting mechanism comprises a limiting block 13 and a limiting switch 14 arranged on the limiting block 13, the limiting switch 14 can adopt an Omron EE-SX672 type, is in communication connection with the controller, and is used for detecting the limit position of the adjusting block 4. The controller controls the servo motor 9 to be closed when the adjusting block 4 contacts the limiting switch 14, and at this time, it can be judged that the belt 15 is in a tensioned state.

[0044] The limiting block 13 and the support 1 are detachably connected, that is, the limiting block 13 is fixed on the support 1 through bolts, the support 1 is provided with two rows of front-rear spaced fixing holes, each row comprises a plurality of left-right spaced fixing holes. By changing the fixing position of the bolt, the installation position of the limiting block 13 can be changed. Correspondingly, the adjusting block 4 triggers the limiting switch 14 under different active strokes, so that the belt replacement auxiliary device of the utility model can be applicable to belts 15 of different lengths.

[0045] The controller is a PLC controller, preset adjustment program, control servo motor 9 positive and negative rotation and stop logic.

[0046] The working principle of the belt replacement auxiliary device is:

[0047] When the belt 15 is disassembled, the controller drives the servo motor 9 to rotate forward, the two-way screw rod 5 drives the two adjusting blocks 4 to synchronously approach along the guide shaft 7, the distance between the two pulleys 2 is reduced, and the belt 15 is relaxed. Maintenance personnel do not need to manually pry the belt 15, and directly remove the failed belt 15 from the relaxed pulley 2, avoiding the safety risk caused by the elastic potential rebound.

[0048] When the belt 15 is installed, the worker sleeves the new belt 15 on the two pulleys 2, the controller drives the servo motor 9 to reverse, the two adjusting blocks 4 synchronously move away, the distance between the two pulleys 2 is increased, and the belt 15 is tensioned. When the adjusting block 4 moves to the trigger limit switch 14, the controller immediately closes the servo motor 9, and the belt 15 is tensioned. In actual use, a tension detection sensor is installed, the tension detection sensor monitors the tension of the belt 15 in real time, and the controller is in communication connection with the tension detection sensor. When the monitored tension is less than a preset range, the controller controls the servo motor 9 to reverse, so that the distance between the two pulleys 2 is increased, and the tension of the belt 15 is ensured.

[0049] For different specifications of the belt 15, the limit block 13 is disassembled and the installation position thereof on the support 1 is adjusted, the limit travel of the adjusting block 4 is changed, different tension requirements are adapted, and the tension error caused by artificial experience judgment is avoided.

[0050] The belt replacement auxiliary device of the utility model utilizes an electric adjusting mechanism to replace manual operation, avoids the winding and clamping risk caused by the rebound of the belt 15 and the rotation of the pulley 2, realizes automatic control of the tension through linkage of the limit switch 14 and the controller, and improves operation safety. The two-way screw rod 5 is matched with the guide shaft 7 to realize synchronous and accurate movement of the pulley 2, the symmetrical structure ensures balanced stress, avoids belt 15 deflection or uneven tension, and improves assembly quality. The limit block 13 is detachable and adjustable in position, can adapt to various belt specifications and equipment working conditions, can be applied to different transmission systems without additional modification, and reduces use cost.

[0051] In other embodiments, if the transmission system used is single, the specifications of the belt 15 are also uniform at this time, and the limit block 13 can be welded on the support 1, and the position does not need to be adjusted.

[0052] In other embodiments, only one of the pulleys 2 can slide relative to the support 1. At this time, the electric adjusting mechanism can only use an electric push rod, and the end portion of the electric push rod is connected with a fixed block, and the wheel shaft 3 of the movable pulley 2 is rotationally assembled with the fixed block.

[0053] In other embodiments, each belt pulley 2 can also be driven by an electric adjusting mechanism respectively. At this time, the electric adjusting mechanism can adopt an electric push rod, the end of the electric push rod is connected with a fixed block, and the wheel shaft 3 of the movable belt pulley 2 is rotationally assembled with the fixed block.

[0054] The above is only a preferred embodiment of the present application, and is not used to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A belt replacement assisting device characterized by comprising: The bracket, the pulley, the electric adjusting mechanism and the controller are included. The pulleys are arranged in the length direction of the bracket and at least one of the pulleys is movably assembled with the bracket. The electric adjusting mechanism is arranged on the side of the bracket away from the pulleys and is used to drive the wheel shaft of at least one of the pulleys to move along the length direction of the bracket. The controller is in control connection with the electric adjusting mechanism and controls the action of the electric adjusting mechanism.

2. A belt replacement aid according to claim 1, characterized in that The wheel shafts of the two pulleys are driven by the electric adjusting mechanism to move synchronously close to or away from each other.

3. A belt replacement aid according to claim 2, characterised in that The electric adjusting mechanism includes a servo motor, a bevel gear assembly, a bidirectional screw rod and an adjusting block.

4. A belt replacement aid according to claim 3, characterised in that The bracket is provided with an adjusting long hole corresponding to the position of the wheel shaft of each pulley.

5. A belt replacement aid according to claim 3, characterised in that The adjusting block is provided with two adjusting blocks, and the wheel shaft of each pulley is rotatably assembled on the corresponding adjusting block.

6. A belt replacement aid according to any one of claims 3-5, characterized in that The bidirectional screw rod has two outer thread segments with opposite screw directions.

7. A belt replacement aid according to claim 6, characterised in that The two adjusting blocks are in threaded connection with the two outer thread segments, respectively.

8. A belt replacement aid according to claim 7, characterised in that The bracket is provided with a guide shaft parallel to the bidirectional screw rod. The two adjusting blocks are in sliding fit with the guide shaft. The controller is in control connection with the servo motor. The servo motor drives the bidirectional screw rod to rotate through the bevel gear assembly. The two pulleys are symmetrically arranged on the two sides of the servo motor. The bracket is provided with two support plates symmetrically arranged on the two sides of the servo motor. The two support plates are located between the two adjusting blocks. The bidirectional screw rod is rotatably assembled with the two support plates. The guide shaft is fixedly connected with the two support plates. The bracket is further provided with a limiting mechanism on the same side of the electric adjusting mechanism. The limiting mechanism includes at least one limiting block and a limiting switch arranged on the limiting block. The controller is in communication connection with the limiting switch. The controller controls the servo motor to be closed when the adjusting block contacts the limiting switch to tension the belt. The limiting block is detachably connected with the bracket. The installation position of the limiting block on the bracket is adjustable.

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