Conveying belt tensioning mechanism of non-standard conveying equipment

Abstract

The invention relates to the field of conveying belt tensioning adjustment, in particular to a conveying belt tensioning mechanism of non-standard conveying equipment. The conveying belt tensioning mechanism of the non-standard conveying equipment comprises two sets of machine frames which are symmetrically arranged, and the two sets of machine frames are both fixed to the lower end of a middle frame body structure of a belt conveyor and correspond to a belt body loosening and drooping area. The plurality of guide rollers are arranged between the two groups of racks; the mechanical tensioning adjusting mechanism comprises an extrusion roller and an adjusting assembly; the elastic tensioning adjusting mechanism is composed of two sets of elastic positioning assemblies and a self-adaptive conveying roller, the two sets of elastic positioning assemblies are installed on the side portions of the two sets of base frames respectively, and the self-adaptive conveying roller is installed between the two sets of elastic positioning assemblies. According to the conveying belt tensioning mechanism of the non-standard conveying equipment, more accurate tensioning adjustment of the belt body is achieved in the mode that elasticity and rigidity are matched.

Description

Technical Field

[0001] This invention relates to the field of conveyor belt tension adjustment, and more particularly to a conveyor belt tensioning mechanism for non-standard conveyor equipment. Background Technology

[0002] Conveyor belt tension adjustment is one of the most core and fundamental maintenance and design aspects of belt conveyor systems. Its fundamental purpose can be summarized as: finding an optimal balance between "too tight" and "too loose" conveyor belts to ensure that the entire conveyor system can operate stably, efficiently, and safely for a long time.

[0003] Non-standard conveyor belt tensioning structures typically employ a single rigid or elastic tensioning method;

[0004] For example, patent number 202123412055.8 describes "a tension adjustment structure for a conveyor belt", which includes a first side plate and a second side plate located to the right of the first side plate. Slider blocks are slidably connected inside both guide rails. The outer wall of the rotating drum is wound with a conveyor belt. The tension adjustment device is located to the right of the second side plate. The tension adjustment device facilitates the adjustment of the conveyor belt tension. Specifically, when the conveyor belt is too tight, the screw rotates, causing the movable plate to move backward, simultaneously driving the two sliders, the rotating shaft, and the rotating drum to move backward, reducing the distance between the two rotating drums and thus loosening the conveyor belt. When the conveyor belt is too loose, the screw rotates in the opposite direction to tighten the conveyor belt. This solves the problem of existing devices having a fixed distance between the front and rear rotating drums, leading to the conveyor belt being too tight or too loose, causing device damage or conveyor belt deviation, and is beneficial for the normal operation of the conveyor belt. While its single rigid adjustment component can achieve a large-scale tension adjustment of the belt, it cannot adaptively adjust the belt tension, which can easily cause damage to the belt.

[0005] Patent No. 202223085742.8 describes a "conveyor belt tension adjustment device", which includes two sets of clamping plates, two sets of fixing frames, a conveying component and an adjustment component. The two sets of clamping plates are symmetrically arranged, the two sets of fixing frames are installed on one side of the clamping plates by bolts, the conveying component is installed between the clamping plates, and the adjustment component is installed on one side of the clamping plates. This invention features an adjustment component that uses an auxiliary wheel to traction and limit the tension of the conveyor belt. When the conveyor belt is taut or slack, the support rod moves up or down with the help of a spring. The movement of the support rod moves the fixed block, which in turn moves the auxiliary wheel, thus fine-tuning the tension of the conveyor belt. When the tension is too high, the first or second moving contact touches the fixed cylinder, triggering the electric actuator to adjust the height of the auxiliary wheel, thereby enabling timely adjustment of the conveyor belt tension and preventing damage to the conveyor belt. It adjusts the tension of the conveyor belt by pressing down, exhibiting both rigid compression and elastic adaptive adjustment. However, this adjustment device requires sufficient vertical adjustment space.

[0006] Therefore, it is necessary to provide a new conveyor belt tensioning mechanism for non-standard conveying equipment to solve the above-mentioned technical problems. Summary of the Invention

[0007] To solve the above-mentioned technical problems, the present invention provides a conveyor belt tensioning mechanism for non-standard conveying equipment.

[0008] The conveyor belt tensioning mechanism of the non-standard conveying equipment provided by the present invention includes:

[0009] The frame consists of two symmetrically arranged sets of frames, both sets of which are fixed to the lower end of the frame structure in the belt conveyor, corresponding to the slack and sagging area of ​​the belt.

[0010] Guide rollers, wherein there are multiple guide rollers, all installed between two sets of frames;

[0011] A mechanical tension adjustment mechanism includes a squeeze roller and an adjustment assembly. The squeeze roller contacts the belt and applies radial rigid pressure to it, while the adjustment assembly can drive the squeeze roller to move horizontally to change the pressure of the squeeze roller on the belt.

[0012] The elastic tension adjustment mechanism consists of an elastic positioning component and an adaptive conveyor roller. The elastic positioning component is in two sets, which are respectively installed on the sides of two base frames. The adaptive conveyor roller is installed between the two sets of elastic positioning components and also contacts the belt and generates elastic compression.

[0013] Preferably, the guide roller is mounted on the frame via a bearing housing.

[0014] Preferably, the adjustment assembly includes two first fixed seats, which are bolted to one side of one set of frames. A single helical screw is rotatably mounted on the two first fixed seats. One end of the single helical screw is welded and fixed with an internal hexagonal end seat, and a transmission cylinder is threadedly connected to the single helical screw. A first connecting seat is welded and fixed to the outer circumference of the transmission cylinder.

[0015] The shaft at one end of the extrusion roller is rotatably connected to the first connecting seat.

[0016] Preferably, two first fixing seats are bolted to one side of another of the frames, and a light rod arranged parallel to the single helical screw is fixed between the two second fixing seats. A second connecting seat is slidably connected to the light rod.

[0017] The shaft at the other end of the extrusion roller is rotatably connected to the second connecting seat.

[0018] Preferably, the elastic positioning component includes a third fixed seat, which is bolted to one side of the frame. A sliding rod is slidably connected to the third fixed seat, and a slide block is welded to the other end of the sliding rod. A spring is also sleeved on the sliding rod to abut against the third fixed seat and the slide block.

[0019] Preferably, a ball bearing that rolls on the frame is embedded in one side of the slide.

[0020] Preferably, the adaptive conveying roller includes a fixed shaft, which is fixed to a slide block. Multiple disc springs are fixed on the fixed shaft, bearings are fixed to the outside of the disc springs, and roller shells are fixed to the outside of the bearings.

[0021] Preferably, the two symmetrically arranged disc springs form a group, together constituting an elastic bracket for mounting the bearing.

[0022] Preferably, the frame is also provided with a slide for the movement of the extrusion roller and the adaptive conveying roller.

[0023] Compared with related technologies, the conveyor belt tensioning mechanism of the non-standard conveying equipment provided by the present invention has the following beneficial effects:

[0024] 1. The present invention can apply a precise and stable rigid preload to the conveyor belt through a mechanical tension adjustment mechanism, effectively preventing belt slippage and providing the main tension force for the system; at the same time, the elastic tension adjustment mechanism can absorb the impact and vibration caused by the start-up and shutdown of the conveyor and load changes, and can automatically compensate for the permanent elongation of the belt.

[0025] 2. The mechanical tension adjustment mechanism adopts screw drive and has good self-locking characteristics. It can firmly lock the position of the extrusion roller after adjustment, effectively preventing the tension force from decreasing due to system vibration and ensuring the long-term stability of the tension effect.

[0026] 3. The disc spring assembly in the elastic tension adjustment mechanism has the characteristics of high stiffness and long service life, which can provide continuous and stable elastic support, effectively buffer the impact load during power transmission, protect key components such as conveyor belt, bearing and drive motor, and extend the service life of the entire conveying system.

[0027] 4. The mechanical tension adjustment mechanism and the elastic tension adjustment mechanism are integrated and installed, which takes up less space and makes the whole unit more compact. Attached Figure Description

[0028] Figure 1 A schematic diagram of a preferred embodiment of the conveyor belt tensioning mechanism of the non-standard conveying equipment provided by the present invention;

[0029] Figure 2 As shown in this invention Figure 1 A partial structural diagram;

[0030] Figure 3 This is a schematic diagram of the mechanical tension adjustment mechanism shown in this invention;

[0031] Figure 4 This is a schematic diagram of the elastic tension adjustment mechanism shown in the present invention. Figure 1 ;

[0032] Figure 5 This is a schematic diagram of the elastic tension adjustment mechanism shown in the present invention. Figure 2 ;

[0033] Figure 6 This is a schematic diagram of the elastic tension adjustment mechanism shown in the present invention. Figure 3 .

[0034] Labels in the diagram: 1. Frame; 2. Guide roller;

[0035] 3. Mechanical tension adjustment mechanism; 31. Extrusion roller; 32. First fixed seat; 33. Single helical screw; 34. Hexagonal socket end seat; 35. Transmission cylinder; 36. First connecting seat; 37. Second fixed seat; 38. Smooth rod; 39. Second connecting seat;

[0036] 4. Elastic tension adjustment mechanism;

[0037] 41. Elastic positioning assembly; 411. Third fixed seat; 412. Slide rod; 413. Slide block; 414. Spring;

[0038] 42. Adaptive conveyor roller; 421. Fixed shaft; 422. Disc spring; 43. Bearing; 424. Roller shell;

[0039] 5. Body. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0041] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0042] Please see Figures 1 to 6 The present invention provides a conveyor belt tensioning mechanism for a non-standard conveying equipment, which includes a frame 1, a mechanical tensioning adjustment mechanism 3 and an elastic tensioning adjustment mechanism 4.

[0043] Among them, there are two sets of frames 1 arranged symmetrically. Both sets of frames 1 are fixed to the lower end of the frame structure in the belt conveyor, corresponding to the slack and sagging area of ​​the belt body 5. There are multiple guide rollers 2, which are installed between the two sets of frames 1 through bearing seats.

[0044] It should be noted that: Frame 1 adopts two sets of symmetrical arrangement, which are rigidly connected to the lower crossbeam or special mounting base of the middle frame of the belt conveyor by high-strength bolts. Its installation position corresponds to the slack and sagging section area that is naturally formed when the conveyor belt is running under full load or no load, so as to achieve the most direct and efficient control of the belt tension.

[0045] Between the two sets of parallel frames 1, multiple guide rollers 2 are bridging each other. These guide rollers 2 are all fixed to the reserved mounting surface inside the frame 1 by bearing seat assemblies, providing a solid mounting foundation for the subsequent tensioning actuator. They can also effectively guide and support the drooping belt 5, initially regulate its running trajectory, prevent the belt 5 from swinging excessively or interfering with the structure below, and create favorable conditions for the efficient operation of the subsequent mechanical and elastic tensioning mechanism.

[0046] The mechanical tension adjustment mechanism 3 includes a compression roller 31 and an adjustment assembly, wherein the compression roller 31 contacts the belt body 5 and performs rigid compression.

[0047] Please see Figure 3 The adjustment assembly includes two first fixed seats 32, which are bolted to one side of one set of frames 1. A single helical screw 33 is rotatably mounted on the two first fixed seats 32. One end of the single helical screw 33 is welded and fixed to an internal hexagonal end seat 34, and a transmission cylinder 35 is threadedly connected to the single helical screw 33. A first connecting seat 36 is welded and fixed to the outer circumference of the transmission cylinder 35. The shaft of one end of the extrusion roller 31 is rotatably connected to the first connecting seat 36.

[0048] Meanwhile, two second fixed seats 37 are bolted to one side of another frame 1. A guide rod 38, which is parallel to the single spiral screw 33, is fixed between the two second fixed seats 37. A second connecting seat 39 is slidably connected to the guide rod 38. The shaft at the other end of the extrusion roller 31 is rotatably connected to the second connecting seat 39.

[0049] It should be noted that the mechanical tension adjustment mechanism 3, as the rigid adjustment component of this device, applies radial pressure to the running belt 5 through the squeeze roller 31.

[0050] That is, on one side of the frame 1, two first fixed seats 32 are fixed by bolts. The single helical screw 33 is rotatably supported between the two first fixed seats 32. One end of the screw is welded with an internal hexagonal end seat 34, which provides a force application interface for external tools (such as internal hexagonal wrenches) to transmit torque. A transmission cylinder 35 is engaged on the single helical screw 33. The transmission cylinder 35 converts the rotational motion of the single helical screw 33 into its own precise linear motion. The first connecting seat 36 welded to its outer wall is used to connect the shaft of one end of the extrusion roller 31.

[0051] To balance this driving force and ensure the smoothness and straightness of the translation process of the extrusion roller 31, two second fixed seats 37 are provided on the other side of the frame 1, and a smooth rod 38 parallel to the single helical screw 33 is fixedly installed between them. The second connecting seat 39 is slidably sleeved on the smooth rod 38 and connected to the rotating shaft at the other end of the extrusion roller 31.

[0052] During operation, the pressing roller 31 can be driven to move horizontally along the guide direction of the guide rod 38 by rotating the internal hexagonal end seat 34 with a hexagonal wrench, thereby steplessly adjusting the pressing depth and pressure on the belt body 5. This design not only ensures a strong rigid locking force, but its inherent self-locking characteristics of the screw drive can also effectively resist the risk of loosening caused by system vibration, and achieve long-term and reliable maintenance of tension.

[0053] The elastic tension adjustment mechanism 4 consists of an elastic positioning component 41 and an adaptive conveying roller 42.

[0054] Please see Figure 4 The elastic positioning component 41 includes a third fixed seat 411, which is bolted to one side of the frame 1. A sliding rod 412 is slidably connected on the third fixed seat 411. A slide block 413 is welded to the other end of the sliding rod 412. A spring 414 is also sleeved on the sliding rod 412 to press against the third fixed seat 411 and the slide block 413.

[0055] Among them, a ball bearing that rolls on the frame 1 is embedded in one side of the slide 413.

[0056] It should be noted that: the elastic tension adjustment mechanism 4, as the elastic compensation component of this device, is composed of the elastic positioning component 41 and the adaptive conveying roller 42. Its core function is to absorb the impact of the system and automatically compensate for the plastic elongation of the belt 5.

[0057] For the elastic positioning component 41, its third fixed seat 411 is fixed to the side of the frame 1 by bolts, serving as the basic support structure of the entire component; two sliding rods 412 are inserted in the third fixed seat 411 and can slide freely along the axial direction, and their other ends are welded and fixed to the sliding seat 413, so that the sliding seat 413 can be translated axially; a spring 414 is also sleeved on the sliding rod 412, and its two ends abut against the third fixed seat 411 and the sliding seat 413 respectively, and the pre-compression elastic force is the elastic pre-tightening force source applied to the belt body 5;

[0058] Several balls are embedded in the contact side wall between the slide 413 and the frame 1. These balls transform the sliding friction between the slide 413 and the frame 1 into rolling friction, which greatly reduces the motion resistance. Therefore, when adaptive adjustment is made according to the force generated by the belt 5, the sensitivity will be higher and the adaptive adjustment effect will be better.

[0059] Please see Figure 5 and Figure 6 The adaptive conveyor roller 42 includes a fixed shaft 421, which is fixed to the slide block 413. Multiple disc springs 422 are fixed on the fixed shaft 421. Bearings 43 are fixed to the outside of the disc springs 422, and roller shells 424 are fixed to the outside of the bearings 43.

[0060] Among them, two symmetrically arranged disc springs 422 form a group, which together constitute the elastic bracket for mounting the bearing 43.

[0061] It should be noted that the adaptive conveying roller 42 is the core actuator of this elastic tension adjustment mechanism 4. The roller body is composed of a fixed shaft 421, disc springs 422, bearings 43, and roller shell 424. The fixed shaft 421 is fixed at both ends to the slide seats 413 on both sides, becoming the core of static force transmission for the entire roller body. On the fixed shaft 421, multiple sets of disc springs 422 are arranged axially at intervals. Each set consists of two disc springs 422 arranged symmetrically back to back. This symmetrical combination effectively eliminates the lateral overturning moment of a single disc spring 422, ensuring that it provides extremely stable and high-rigidity elastic force only in its axial direction. On the outside of each set of disc springs 422, the inner ring of the bearing 43 is fixed by interference fit or a special pressure cap, while the outer ring of the bearing 43 is fixed to the roller shell 424, allowing the roller shell 424 to rotate independently. The roller shell 424 is a structure that directly contacts the belt 5 to achieve stable transmission of the belt 5.

[0062] The pressure on the belt 5 is transmitted to the disc spring 422 through the rotating roller shell 424 and bearing 43, causing it to undergo a slight elastic deformation, which is proportional to the pressure. When encountering impact loads or belt tension fluctuations, the disc spring 422 can absorb energy through rapid compression and rebound, causing the roller to generate a small floating stroke in the vertical direction, thereby greatly mitigating the impact, suppressing vibration, and automatically maintaining the relative stability of the tension. When used in conjunction with the elastic positioning component 41, the adaptive adjustment effect of the belt 5 is further improved.

[0063] The specific operating procedure for this device is as follows:

[0064] First, the entire assembly is installed and fixed to the slack area of ​​the belt 5 at the lower end of the conveyor frame 1 via symmetrically arranged frames 1. For the belt 5, via the lower... Figure 2 The belt is threaded through the device in a way that facilitates subsequent tension adjustment of the belt 5.

[0065] In the initial state, the internal hexagonal end seat 34 of the mechanical tension adjustment mechanism 3 is rotated counterclockwise using tools such as a hex wrench. The single helical screw 33 and the transmission cylinder 35 drive the extrusion roller 31 to move along the axis of the smooth rod 38 (at this time, it can be retracted), reserving adjustment space for the belt 5. At this time, under the pre-pressure of the spring 414, the elastic tension adjustment mechanism 4 slides smoothly along the slide of the frame 1 through the ball embedded in the slide block 413, pushing the adaptive conveying roller 42 to contact the belt 5 and apply the initial elastic tension. Then, a precise tensioning operation is performed. The internal hexagonal end seat 34 is slowly rotated clockwise, driving the extrusion roller 31 to move forward smoothly and generate radial extrusion on the belt 5. The tension of the belt 5 is observed and gradually adjusted to the required pressure. The self-locking characteristic of the screw is used to maintain the rigid tension state.

[0066] If the belt 5 elongates during operation, the elastic tension adjustment mechanism 4 can automatically compensate. That is, the spring 414 pushes the slide block 413 and the adaptive conveying roller 42 to move along the slide, while the elastic support formed by the disc spring 422 supports the floating of the roller shell 424 through the bearing 43, continuously maintaining the contact pressure and absorbing vibration. When the elastic compensation is insufficient, the mechanical adjustment mechanism can be operated again to supplement the tension, thereby achieving the coordinated work of precise rigid adjustment and automatic elastic maintenance.

[0067] The above are merely embodiments of the present invention and do not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A conveyor belt tensioning mechanism for a non-standard conveyor equipment, characterized in that, include: The frame (1) consists of two symmetrically arranged sets of frames (1), both sets of frames (1) are fixed to the lower end of the frame structure in the belt conveyor, corresponding to the slack and sagging area of ​​the belt (5); Guide rollers (2), there are multiple guide rollers (2), all of which are installed between two sets of frames (1); The mechanical tension adjustment mechanism (3) includes a squeezing roller (31) and an adjustment component. The squeezing roller (31) contacts the belt (5) and generates radial rigid squeezing on it. The adjustment component can drive the squeezing roller (31) to move in the horizontal direction to change the pressure of the squeezing roller (31) on the belt (5). The elastic tension adjustment mechanism (4) consists of an elastic positioning component (41) and an adaptive conveying roller (42). The elastic positioning component (41) consists of two sets, which are respectively installed on the sides of two sets of base frames (1). The adaptive conveying roller (42) is installed between the two sets of elastic positioning components (41). The adaptive conveying roller (42) also contacts the belt (5) and generates elastic compression.

2. The conveyor belt tensioning mechanism of the non-standard conveyor equipment according to claim 1, characterized in that, The guide roller (2) is mounted on the frame (1) via a bearing seat.

3. The conveyor belt tensioning mechanism of the non-standard conveyor equipment according to claim 2, characterized in that, The adjustment assembly includes two first fixed seats (32), which are bolted to one side of one set of frames (1). A single helical screw (33) is rotatably mounted on the two first fixed seats (32). One end of the single helical screw (33) is welded and fixed to an internal hexagonal end seat (34), and a transmission cylinder (35) is threaded onto the single helical screw (33). A first connecting seat (36) is welded and fixed to the outer circumference of the transmission cylinder (35). The shaft at one end of the extrusion roller (31) is rotatably connected to the first connecting seat (36).

4. The conveyor belt tensioning mechanism of the non-standard conveyor equipment according to claim 3, characterized in that, Two second fixing seats (37) are bolted to one side of another frame (1), and a light rod (38) parallel to the single helical screw (33) is fixed between the two second fixing seats (37). A second connecting seat (39) is slidably connected to the light rod (38). The shaft at the other end of the extrusion roller (31) is rotatably connected to the second connecting seat (39).

5. The conveyor belt tensioning mechanism of the non-standard conveyor equipment according to claim 4, characterized in that, The elastic positioning component (41) includes a third fixed seat (411), which is bolted to one side of the frame (1). A sliding rod (412) is slidably connected to the third fixed seat (411), and a slide block (413) is welded to the other end of the sliding rod (412). A spring (414) is also sleeved on the sliding rod (412) to press against the third fixed seat (411) and the slide block (413).

6. The conveyor belt tensioning mechanism of the non-standard conveyor equipment according to claim 5, characterized in that, The slide (413) has a ball bearing embedded on one side that rolls on the frame (1).

7. The conveyor belt tensioning mechanism of the non-standard conveyor equipment according to claim 6, characterized in that, The adaptive conveying roller (42) includes a fixed shaft (421) fixed to a slide (413), a plurality of disc springs (422) fixed on the fixed shaft (421), a bearing (43) fixed to the outside of the disc springs (422), and a roller shell (424) fixed to the outside of the bearings (43).

8. The conveyor belt tensioning mechanism of the non-standard conveyor equipment according to claim 7, characterized in that, The two symmetrically arranged disc springs (422) form a group and together constitute an elastic bracket for mounting the bearing (43).

9. The conveyor belt tensioning mechanism of the non-standard conveyor equipment according to claim 7, characterized in that, The frame (1) is also provided with a slide for the extrusion roller (31) and the adaptive conveying roller (42) to move.

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