Belt tension adjustment device and feeder

Abstract

The application belongs to the technical field of belt feeders, and discloses a belt tensioning and adjusting device and a feeder. The feeder comprises a rack, a driving roller, a reversing roller, a belt and the belt tensioning and adjusting device. The driving roller and the reversing roller are arranged at intervals along the length direction of the rack, and the driving roller and the reversing roller jointly tension the belt. The belt tensioning and adjusting device comprises an adjusting mechanism. The adjusting mechanism comprises a sliding member, a thermal deformation driving member and a connecting member. The sliding member is slidably connected to the rack along the length direction of the rack. The reversing roller is rotatably installed on the sliding member. The thermal deformation driving member is arranged at intervals below the belt. The connecting member is connected between the thermal deformation driving member and the sliding member. When the belt is loosened and deviated, the suspended section of the belt is lowered and comes into contact with the thermal deformation driving member to generate heat. The thermal deformation driving member is deformed by heat, and drives the sliding member to move the reversing roller away from the driving roller to adjust the distance between the reversing roller and the driving roller, so as to restore the belt tension.

Description

Technical Field

[0001] This invention relates to the field of belt feeder technology, and more particularly to a belt tension adjustment device and a feeder. Background Technology

[0002] Belt conveyors are core equipment in the field of material conveying. During industrial production operations, the belt carries materials for a long time, which makes it easy for dust to adhere and accumulate. This leads to problems such as increased belt weight, sagging, slack, and decreased tension, which can easily cause belt misalignment, accelerated wear, and reduced conveying accuracy. This directly affects the operational stability and production continuity of the conveying equipment. Therefore, it is necessary to regularly adjust the tension of the belt reversing rollers to ensure the normal working condition of the belt.

[0003] Chinese patent CN223836417U discloses an adjustment device for the reversing roller of a belt conveyor. The device drives the slider to move along the guide rail by rotating the adjustment bolt, thereby moving the connected bearing seat and the reversing roller. After the conveyor belt is tightened, the fixing bolt is locked to complete the adjustment. This device can realize the simple adjustment of the reversing roller and reduce the operation difficulty of the traditional complex adjustment structure.

[0004] However, this existing technical solution has significant technical flaws. It relies entirely on manual operation, lacks adaptive adjustment capabilities, exhibits significant adjustment lag, and has poor responsiveness. Furthermore, the accuracy of manual adjustments is affected by the operator's experience, resulting in poor consistency and requiring regular inspections and interventions by staff, increasing labor intensity and leading to low levels of automated equipment maintenance. During long-term operation, the feeder cannot promptly correct issues such as material accumulation and belt slack, easily causing continuous belt misalignment, accelerated wear, and abnormal operating noises. This significantly shortens belt lifespan, severely restricts equipment operational stability and maintenance efficiency, and fails to meet the continuous, stable, and automated feeding production requirements of modern industry. Summary of the Invention

[0005] The purpose of this invention is to solve or at least alleviate some or all of the aforementioned problems. Therefore, the purpose of this invention is to provide a belt tension adjustment device and a feeder to achieve timely adjustment of belt tension.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A belt tension adjustment device includes a drive roller and a reversing roller spaced apart along the length of a frame. The drive roller and the reversing roller jointly tension the belt. The belt tension adjustment device includes an adjustment mechanism, which includes a sliding member, a heat-deformation drive member, and a connecting member. The sliding member is slidably connected to the frame along the length of the frame. The reversing roller is rotatably mounted on the sliding member. The heat-deformation drive member is spaced apart below the belt. The connecting member connects the heat-deformation drive member and the sliding member. The heat-deformation drive member is configured to generate heat through friction with the belt and deform under heat, thereby driving the sliding member to move the reversing roller away from the drive roller.

[0008] In some alternative embodiments, the thermal deformation drive includes a shape memory alloy plate with a protruding push block on the shape memory alloy plate, and a stop block protruding on the connector for abutting against the push block.

[0009] In some optional embodiments, a feed hopper is provided above the belt, and an openable baffle is provided at the discharge port of the feed hopper. The output end of the discharge drive is connected to the baffle for driving the baffle to block or open the discharge port; the belt tension adjustment device further includes:

[0010] An elastic support mechanism includes a base and a first elastic element. The base is disposed below the frame, and the first elastic element is disposed between the base and the frame, such that the height of the belt in the unloaded state is higher than the height in the loaded state.

[0011] A cleaning mechanism, mounted on the base, is used to remove adhering substances from the surface of the belt, and the cleaning height of the cleaning mechanism is matched with the height of the belt in the unloaded state.

[0012] The detection mechanism is spaced below the belt, and the detection height of the detection mechanism is higher than the contact height between the thermal deformation drive and the belt. The detection mechanism is also signal-connected to the unloading drive.

[0013] In some alternative embodiments, the elastic support mechanism further includes a support member and a movable member, the support member being connected to the base, the movable member being connected to the frame, and the support member and the movable member being slidably connected.

[0014] In some alternative embodiments, the cleaning mechanism includes a first mounting member and a cleaning member. The first mounting member is erected on the base, and the cleaning member includes a rotating shaft and a scraper. The rotating shaft is rotatably connected to the first mounting member about the width of the frame, and the scraper is connected to the rotating shaft circumferentially for contacting the surface of the belt.

[0015] In some optional embodiments, the cleaning mechanism further includes a second mounting member, a collection basket, and a transmission assembly. The second mounting member is connected to the base, the collection basket is disposed below the belt and is slidably connected to the second mounting member along the length of the frame, and the transmission assembly is drively connected between the frame and the collection basket so that when the frame rises, the collection basket can be driven to extend downstream of the belt via the transmission assembly, and when the frame descends, the collection basket can be driven to retract to directly below the belt via the transmission assembly.

[0016] In some optional embodiments, the transmission assembly includes a first transmission member, a second transmission member, and a second elastic member. The first transmission member is connected to the frame, and the second transmission member is connected to the collection basket. The first transmission member has a first inclined surface that gradually slopes from top to bottom along the belt running direction. The second transmission member has a second inclined surface that slides and fits against the first inclined surface. The second elastic member is disposed between the collection basket and the second mounting member so that the collection basket tends to retract to directly below the belt.

[0017] In some optional embodiments, the belt tension adjustment device further includes an alarm mechanism, which includes a counting unit and an alarm unit. The counting unit is linked to the collection basket and is used to record the number of times the collection basket switches between the extended position and the retracted position. The alarm unit is signal-connected to the counting unit and is used to issue an alarm signal when the number of switching reaches a preset threshold.

[0018] In some optional embodiments, the detection mechanism includes a third mounting member, a stop member, a pressure sensor, and a third elastic member. The third mounting member is connected to the frame, the stop member is spaced below the belt and is slidably connected to the third mounting member in the vertical direction, the third elastic member is disposed between the third mounting member and the stop member, the pressure sensor is disposed below the stop member and is signal-connected to the feeding drive member.

[0019] A feeder includes a frame, a drive roller, a reversing roller, a belt, and a belt tensioning adjustment device as described in any of the preceding claims. The drive roller and the reversing roller are spaced apart along the length of the frame, and the drive roller and the reversing roller together tension the belt. A sliding member is slidably connected to the frame along the length of the frame, and the reversing roller is rotatably mounted on the sliding member. A thermal deformation drive member is spaced apart below the belt, and a connecting member connects the thermal deformation drive member and the sliding member. The thermal deformation drive member is configured to generate heat through friction with the belt and deform under heat, thereby driving the sliding member to move the reversing roller away from the drive roller.

[0020] The beneficial effects of this invention are:

[0021] This invention provides a belt tension adjustment device and a feeder. The feeder includes a frame, a drive roller, a reversing roller, a belt, and the belt tension adjustment device. The drive roller and the reversing roller are spaced apart along the length of the frame, and both the drive roller and the reversing roller tension the belt. The belt tension adjustment device includes an adjustment mechanism, which includes a sliding member, a heat-deformation drive member, and a connecting member. The sliding member is slidably connected to the frame along the length of the frame. The reversing roller is rotatably mounted on the sliding member. The heat-deformation drive member is spaced apart below the belt. The connecting member connects the heat-deformation drive member and the sliding member. The heat-deformation drive member is configured to generate heat through friction with the belt and deform under heat, thereby driving the sliding member to move the reversing roller away from the drive roller.

[0022] When the belt becomes loose and runs off-track due to increased weight and deflection caused by dust or damp materials adhering to it, the suspended section of the belt droops and comes into contact with the thermal deformation drive component, generating heat and causing the drive component to deform. This causes the sliding component to move the reversing roller away from the drive roller, adjusting the distance between the reversing roller and the drive roller, restoring belt tension and correcting the misalignment. This allows for timely adjustment of belt tension, preventing continuous belt misalignment, accelerated wear, and abnormal operating noise, extending belt life, ensuring equipment stability and maintenance efficiency, and meeting the continuous, stable, and automated feeding production needs of modern industry. Attached Figure Description

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

[0024] Figure 1 This is a schematic diagram of the structure of the feeder described in an embodiment of the present invention;

[0025] Figure 2 This is a front view of the feeder described in an embodiment of the present invention;

[0026] Figure 3 This is a schematic diagram of the structure of the adjustment mechanism described in the embodiment of the present invention. Figure 1 ;

[0027] Figure 4 This is a front view of the thermal deformation driving component and the connecting component described in the embodiment of the present invention.

[0028] Figure 5 This is a schematic diagram of the structure of the adjustment mechanism described in the embodiment of the present invention. Figure 2 ;

[0029] Figure 6 This is a schematic diagram of the elastic support mechanism described in an embodiment of the present invention;

[0030] Figure 7 This is a schematic diagram of the detection mechanism described in an embodiment of the present invention;

[0031] Figure 8 This is a schematic diagram of the structure of the material collection basket and transmission assembly described in an embodiment of the present invention.

[0032] Figure 9 This is a schematic diagram of the alarm mechanism described in an embodiment of the present invention.

[0033] In the picture:

[0034] 100. Frame; 200. Drive roller; 300. Reversing roller; 400. Belt; 500. Feed hopper; 600. Baffle; 700. Discharge drive unit;

[0035] 1. Adjustment mechanism; 11. Sliding component; 12. Thermal deformation driving component; 121. Push block; 13. Connecting component; 131. Stop block; 14. Bearing component; 141. Slide groove;

[0036] 2. Elastic support mechanism; 21. Base; 22. First elastic element; 23. Support element; 24. Moving element;

[0037] 3. Cleaning mechanism; 31. First mounting component; 32. Cleaning component; 321. Rotating shaft; 322. Scraper; 33. Second mounting component; 34. Collection basket; 35. Transmission assembly; 351. First transmission component; 352. Second transmission component; 353. Second elastic component;

[0038] 4. Testing mechanism; 41. Third mounting component; 42. Supporting component; 43. Pressure sensor; 44. Third elastic component;

[0039] 5. Alarm mechanism; 51. Counting unit; 511. Receiving component; 512. Counting bar; 5121. Tear mark; 513. First magnetic component; 514. Second magnetic component; 515. Push button switch; 516. Fixing plate; 517. Limiting component; 518. Gear; 519. Rack; 520. Impact rod; 521. Slot; 522. Fourth elastic component; 52. Alarm unit. Detailed Implementation

[0040] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0041] In this invention, the terms "comprising," "including," "having," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0042] In this invention, the term "and / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A alone, A and B simultaneously, and B alone. Additionally, in this invention, the character " / " generally indicates that the preceding and following related objects have an "and / or" relationship.

[0043] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," "fixed," "combined," "coupled," and "installed" should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a direct connection or an indirect connection via an intermediate medium; or the internal communication of two components or the interaction between two components. As examples, a direct connection refers to two parts or components being connected together without the need for an intermediate medium, while an indirect connection refers to two parts or components each being connected to at least one intermediate medium, with the connection achieved through the intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances. Furthermore, "connected" and "coupled" are not limited to physical or mechanical connections or couplings, but can also include electrical connections or couplings.

[0044] In this invention, those skilled in the art will understand that relative terms (e.g., “about,” “approximately,” “basically,” etc.) used in conjunction with quantities or conditions are to include the value and have the meaning indicated by the context. For example, such relative terms include at least the degree of error associated with the measurement of a particular value, tolerances associated with the particular value due to manufacturing, assembly, use, etc. Such terms should also be considered as disclosing a range defined by the absolute values ​​of the two endpoints. Relative terms may refer to a certain percentage (e.g., 1%, 5%, 10% or more) of the indicated value. Numerical values ​​not using relative terms should also be disclosed as specific values ​​with tolerances. Furthermore, “basically” when expressing relative angular relationships (e.g., substantially parallel, substantially perpendicular) may refer to a certain degree (e.g., 1 degree, 5 degrees, 10 degrees or more) added to or subtracted from the indicated angle.

[0045] In this invention, those skilled in the art will understand that the function performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, the function performed by a part can also be performed by one part, one component, or a combination of multiple parts.

[0046] In this invention, the terms "upper," "lower," "left," "right," "front," and "rear," etc., refer to the orientations or positional relationships shown in the accompanying drawings. They are used solely for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, in the context, it should be understood that when an element is mentioned as being "upper" or "lower" than another element, it can be directly connected to the other element "upper" or "lower," or indirectly connected through an intermediate element. It should also be understood that directional terms such as "upper side," "lower side," "left side," "right side," "front side," and "rear side" not only represent positive orientation but can also be understood as lateral orientation. For example, "above," "on top of," "upper side of," and "above" the first feature "above" or "on the second feature" includes the first feature being directly above, to the upper left, to the upper right, to the upper front, and to the upper rear of the second feature, or simply indicating that the first feature is at a higher horizontal level than the second feature. The terms "below," "under," "below," and "below" for "first feature" and "second feature" include situations where the first feature is directly below, to the lower left, to the lower right, in front of, or behind the second feature, or simply indicate that the first feature is at a lower horizontal level than the second feature. Furthermore, the terms "first" and "second" are used merely for descriptive distinction and have no specific meaning.

[0047] like Figures 1-9As shown, this embodiment provides a belt tension adjustment device and a feeder. The feeder includes a frame 100, a drive roller 200, a reversing roller 300, a belt 400, and a belt tension adjustment device. The drive roller 200 and the reversing roller 300 are spaced apart along the length of the frame 100, and the drive roller 200 and the reversing roller 300 together tension the belt 400.

[0048] The belt tension adjustment device includes an adjustment mechanism 1, which includes a sliding member 11, a thermal deformation drive member 12, and a connecting member 13. The sliding member 11 is slidably connected to the frame 100 along the length of the frame 100. The reversing roller 300 is rotatably mounted on the sliding member 11. The thermal deformation drive member 12 is spaced below the belt 400. The connecting member 13 is connected between the thermal deformation drive member 12 and the sliding member 11. The thermal deformation drive member 12 is configured to generate heat through friction with the belt 400 and deform under heat, thereby driving the sliding member 11 to move the reversing roller 300 away from the drive roller 200.

[0049] When the belt 400 becomes loose and runs off-track due to increased weight and deflection caused by dust or damp materials adhering to it, the suspended section of the belt 400 droops and comes into contact with the thermal deformation drive 12, generating heat and causing the thermal deformation drive 12 to deform. This causes the sliding component 11 to move the reversing roller 300 away from the drive roller 200, adjusting the distance between the reversing roller 300 and the drive roller 200, restoring the belt 400 tension and correcting the misalignment. This allows for timely adjustment of the belt 400 tension, preventing problems such as continuous belt misalignment, accelerated wear, and abnormal noise during operation, extending the belt 400's service life, ensuring equipment operational stability and maintenance efficiency, and meeting the continuous, stable, and automated feeding production needs of modern industry.

[0050] In this embodiment, the thermal deformation driving component 12 includes a shape memory alloy plate. It is readily understood that the shape memory alloy plate undergoes a preset shape memory heat treatment, exhibiting a two-way shape memory characteristic of low-temperature relaxation and high-temperature shrinkage and restoration; that is, it maintains a relaxed, elongated shape in a low-temperature environment below the phase transition temperature, and shrinks and restores a preset reset shape in a high-temperature environment above the phase transition temperature. A pusher block 121 protrudes from the shape memory alloy plate, and a stop block 131 protrudes from the connector 13 for abutting against the pusher block 121. When the belt 400 is normally tensioned, it does not contact the shape memory alloy plate, and the shape memory alloy plate maintains its original shape at room temperature. When the belt 400 sags, it comes into contact with the shape memory alloy plate and rubs against it. The friction generates heat, causing the shape memory alloy plate to heat up and reach the phase transition threshold. The shape memory alloy plate then contracts and deforms. The push block 121 presses the stop block 131 to move away from the drive roller 200, thereby driving the sliding member 11 to move the reversing roller 300 away from the drive roller 200 through the connecting member 13. This adjusts the position of the reversing roller 300, tensions the belt 400, and corrects belt deviation. When the material adhering to the belt 400 decreases, its weight recovers, its deflection decreases, and it detaches from the shape memory alloy plate, the frictional heat source disappears, the shape memory alloy plate temperature drops, and it returns to its initial shape at room temperature. At this time, the push block 121 on the shape memory alloy plate no longer applies a pushing force to the stop block 131.

[0051] It should be noted that the greater the slack of the belt 400, the greater the drooping deflection of its suspended section, the larger the contact area with the shape memory alloy plate, the higher the intensity of frictional heat generation between the belt 400 and the shape memory alloy plate during operation, and the faster the heat accumulation rate. When the temperature of the shape memory alloy plate reaches the phase change threshold, the greater the slack, the more significant the temperature response, and the greater the shrinkage deformation of the shape memory alloy plate. This, in turn, drives the sliding member 11 to generate a greater displacement away from the drive roller 200 through the connector 13, causing the reversing roller 300 to generate a greater adjustment displacement. This makes the stroke of the reversing roller 300 proportional to the slack of the belt 400, thereby flexibly and automatically adjusting the position of the reversing roller 300 according to the slack of the belt 400 to maintain the appropriate tension of the belt 400.

[0052] Furthermore, such as Figures 3-5 As shown, the adjustment mechanism 1 also includes a support member 14, which is connected to the frame 100 and used to mount the shape memory alloy plate. The support member 14 has a groove 141 extending along the length of the frame 100. The push block 121 and the stop block 131 are slidably engaged with the groove 141. The groove 141 provides guidance and limiting for the movement of the push block 121 and the stop block 131 along the length of the frame 100, which helps improve the stability of the connecting member 13's movement and increases transmission efficiency.

[0053] Optionally, the thermal deformation drive 12 can also be a bimetallic thermistor, which consists of two layers of bonded metal sheets with different coefficients of thermal expansion. When heated, the bimetallic thermistor bends toward the side with the smaller coefficient of expansion, and automatically springs back to its original position when cooled, which can also drive the connector 13 to move.

[0054] Optionally, the thermal deformation drive 12 can also be a paraffin thermal actuator, which includes a slidingly fitted sleeve and a push rod. The sleeve also contains paraffin wax. A return spring is provided between the push rod and the sleeve. When the paraffin wax is heated, it melts and expands in volume, pushing the push rod to extend. When the temperature drops, the paraffin wax solidifies and contracts, and the return spring drives the push rod to return to its original position. The push rod is connected to the connector 13.

[0055] Optionally, the sliding member 11 is provided with a bearing, and the reversing roller 300 is rotatably mounted on the sliding member 11 via the bearing.

[0056] like Figure 1 and Figure 2 As shown, in some optional embodiments, a feed hopper 500 is provided above the belt 400, and an openable baffle 600 is provided at the discharge port of the feed hopper 500. The output end of the discharge drive 700 is connected to the baffle 600 for driving the baffle 600 to block or open the discharge port. The belt tension adjustment device also includes an elastic support mechanism 2, a cleaning mechanism 3, and a detection mechanism 4. The elastic support mechanism 2 includes a base 21 and a first elastic element 22. The base 21 is located below the frame 100, and the first elastic element 22 is located between the base 21 and the frame 100. When the belt 400 is under load, its weight increases, which can compress the first elastic element 22, causing the height of the belt 400 to decrease. When unloaded, its weight decreases, the first elastic element 22 returns to its original position, causing the height of the belt 400 to increase, so that the height of the belt 400 in the unloaded state is higher than its height in the loaded state. The cleaning mechanism 3 is mounted on the base 21 and is used to remove the adhering substances on the surface of the belt 400. The cleaning height of the cleaning mechanism 3 is matched with the height of the belt 400 in the unloaded state. The detection mechanism 4 is spaced below the belt 400. The detection height of the detection mechanism 4 is higher than the contact height between the heat deformation drive 12 and the belt 400. The detection mechanism 4 is signal connected to the unloading drive 700.

[0057] The detection height of the detection mechanism 4 is higher than the contact height between the heat deformation drive 12 and the belt 400. It is used to detect small deflections and sagging caused by dust adhering to the surface of the belt 400. It can sense slight slack before the belt 400 contacts the shape memory alloy plate and removes the adhering material from the belt 400 surface through contact friction by the cleaning mechanism 3, reducing the load on the belt 400 and preventing sagging and slack. During normal feeding, the feeding drive 700 drives the baffle 600 to open the feeding port, and the material in the feed hopper 500 falls onto the belt 400. The weight of the belt 400 increases, the frame 100 compresses the first elastic element 22, and the belt 400 descends as a whole, making the surface height of the belt 400 lower than the cleaning height of the cleaning mechanism 3, thus preventing the cleaning mechanism 3 from obstructing the feeding. When the dust adhering to the surface of the belt 400 increases, resulting in slight slack and a small increase in deflection, the sagging of the belt 400 is insufficient to contact the heat deformation drive. Item 12, but can be sensed by the detection mechanism 4. The detection mechanism 4 sends a blocking signal to the feeding drive component 700, causing the feeding drive component 700 to drive the baffle 600 to block the feeding port, stopping the feeding of material onto the belt 400, thus creating the preconditions for cleaning the belt 400. After the original material on the belt 400 is discharged, the overall weight is reduced, and the first elastic element 22 drives the frame 100 to reset and rise, so that the belt 400 reaches the cleaning height of the cleaning mechanism 3. The cleaning mechanism 3 removes the adhering substances on the surface of the belt 400. The above structure can identify slight loosening caused by dust adhesion in advance, realize the whole process of feeding shutdown, automatic reset, and precise impurity removal mechanical linkage, without manual intervention, and can reduce the loosening and deviation of the belt 400 caused by dust accumulation from the source, effectively protecting the belt 400, reducing wear, and improving feeding stability. It complements the adjustment mechanism 1, significantly improving the reliability and service life of the equipment. It should be noted that the detection height of the detection mechanism 4 refers to the height at which the belt 400 can trigger the detection mechanism 4 to send a blocking signal.

[0058] Optionally, the unloading drive unit 700 may include, but is not limited to, a drive motor, a hydraulic motor, or a pneumatic motor, and is not limited thereto.

[0059] like Figure 1 and Figure 6 As shown, specifically, the elastic support mechanism 2 also includes a support member 23 and a movable member 24. The support member 23 is connected to the base 21, and the movable member 24 is connected to the frame 100. The support member 23 and the movable member 24 are slidably connected. The sliding engagement of the support member 23 and the movable member 24 provides a guiding and limiting function for the lifting and lowering movement of the frame 100, which helps to improve the stability of the compression and reset stroke of the first elastic member 22, thereby improving the load capacity and operational stability of the feeder. In this embodiment, the first elastic member 22 is disposed between the support member 23 and the movable member 24.

[0060] Furthermore, there are multiple elastic support mechanisms 2, which are spaced apart on both sides of the frame 100, which helps to distribute the load and provide reliable and stable support for the frame 100.

[0061] like Figure 1 As shown, in some optional embodiments, the cleaning mechanism 3 includes a first mounting member 31 and a cleaning member 32. The first mounting member 31 is erected on the base 21. The cleaning member 32 includes a rotating shaft 321 and a scraper 322. The rotating shaft 321 is rotatably connected to the first mounting member 31 around the width direction of the frame 100. The scraper 322 is connected to the rotating shaft 321 circumferentially and is used to contact the surface of the belt 400. The operation of the belt 400 drives the scraper 322 to rotate. On the one hand, the scraper 322 thoroughly scrapes away the dust and impurities adhering to the surface of the belt 400. On the other hand, the scraper 322, through its own rotation, directs the scraped waste to be discharged downstream of the belt 400, thereby realizing automatic impurity removal from the surface of the belt 400.

[0062] Optionally, the number of scrapers 322 can be one, two, three or more. In this embodiment, three scrapers 322 are evenly spaced around the circumference of the rotating shaft 321, and each scraper 322 contacts the surface of the belt 400 in sequence, which can effectively improve cleaning efficiency.

[0063] In some optional embodiments, the cleaning mechanism 3 further includes a second mounting member 33, a collection basket 34, and a transmission assembly 35. The second mounting member 33 is connected to the base 21, the collection basket 34 is disposed below the belt 400, and the collection basket 34 is slidably connected to the second mounting member 33 along the length of the frame 100. The transmission assembly 35 is drively connected between the frame 100 and the collection basket 34, so that when the frame 100 rises, the transmission assembly 35 can drive the collection basket 34 to extend downstream of the belt 400, and when the frame 100 falls, the transmission assembly 35 can drive the collection basket 34 to retract to directly below the belt 400.

[0064] During normal feeding, the load on belt 400 increases, and the frame 100 and belt 400 descend as a whole. The transmission component 35 drives the collection basket 34 to retract directly below belt 400, avoiding interference with the normal material conveying path. When dust adheres to belt 400 and causes slight slack, the detection mechanism 4 sends a signal to the downward drive component 700 to block the discharge port and stop feeding material onto belt 400. After the original material on belt 400 is emptied, the load on belt 400 decreases, the frame 100 rises, and belt 400 contacts scraper 322. Scraper 322 can scrape off the adhering material on the surface of belt 400 and discharge it downstream of belt 400. At the same time, when the frame 100 rises, it can drive the collection basket 34 to extend downstream of belt 400 through the transmission component 35 to accurately catch the adhering material, achieving effective collection of waste residue and preventing waste residue leakage from polluting the production environment.

[0065] Specifically, the transmission assembly 35 includes a first transmission member 351, a second transmission member 352, and a second elastic member 353. The first transmission member 351 is connected to the frame 100, and the second transmission member 352 is connected to the collection basket 34. The first transmission member 351 is provided with a first inclined surface, which gradually slopes from top to bottom along the running direction of the belt 400. The second transmission member 352 is provided with a second inclined surface that slides and fits against the first inclined surface. The second elastic member 353 is disposed between the collection basket 34 and the second mounting member 33 so that the collection basket 34 has a tendency to retract to directly below the belt 400. When the frame 100 rises, the first transmission component 351 rises along with the frame 100. Through the sliding contact of the first inclined surface and the second inclined surface, it pushes the second conveyor component to move downstream of the belt 400, thereby causing the collection basket 34 to extend downstream of the belt 400. When the frame 100 descends, the first transmission component 351 descends along with the frame 100. Under the restoring force of the second elastic component 353, the second conveyor component moves towards the first transmission component 351, thereby causing the collection basket 34 to retract to directly below the belt 400, avoiding interference with the normal material conveying.

[0066] like Figure 7 As shown, in some optional embodiments, the detection mechanism 4 includes a third mounting member 41, a stop member 42, a pressure sensor 43, and a third elastic member 44. The third mounting member 41 is connected to the frame 100. The stop member 42 is spaced below the belt 400 and is slidably connected to the third mounting member 41 in the vertical direction. The third elastic member 44 is disposed between the third mounting member 41 and the stop member 42. The pressure sensor 43 is disposed below the stop member 42 and is signal-connected to the feeding drive member 700. When the surface of the belt 400 is covered with more dust, resulting in slight slack and a slight increase in deflection, its suspended section droops down to contact and press the stop member 42, causing the stop member 42 to move downward relative to the third mounting member 41 and compress the third elastic member 44 until the stop member 42 triggers the pressure sensor 43 to generate a pressure signal, which is transmitted to the feeding drive member 700. The drive motor drives the baffle 600 to block the feeding port and stop feeding the belt 400.

[0067] In other alternative embodiments, the detection mechanism 4 may also employ a laser displacement sensor or a visual camera detection component, which is not limited here.

[0068] In some optional embodiments, the belt tension adjustment device further includes an alarm mechanism 5, which includes a counting unit 51 and an alarm unit 52. The counting unit 51 is linked to the collection basket 34 and is used to record the number of times the collection basket 34 switches between the extended and retracted positions. The alarm unit 52 is signal-connected to the counting unit 51 and is used to issue an alarm signal when the number of switching reaches a preset threshold. The alarm signal includes an audible signal, a visual signal, and / or an electrical signal.

[0069] The alarm mechanism 5 monitors the cleanliness of the belt 400 by recording the number of times the collection basket 34 extends. If the alarm cycle is long when the number of times reaches the preset threshold, it indicates that the speed at which impurities adhere to the belt 400 is slow, the cleaning interval is reasonable, and the belt 400 is in good condition. If the alarm cycle is significantly shortened and the cleaning action is too frequent, it indicates that the impurities on the surface of the belt 400 are seriously adhered, and the scraper 322 alone cannot effectively remove them. Manual intervention is required for timely maintenance and treatment.

[0070] like Figure 8 and Figure 9 As shown, in this embodiment, the counting unit 51 includes a receiving member 511, a counting bar 512, a first magnetic member 513, a second magnetic member 514, a push-button switch 515, a fixing plate 516, a limiting member 517, a gear 518, a rack 519, and an impact rod 520. The receiving member 511 is connected to the second mounting member 33. The receiving member 511 has a receiving groove extending vertically, with the opening of the receiving groove facing downwards. The counting bar 512 is slidably received in the receiving groove, and the lower end of the counting bar 512 can extend out of the opening of the receiving groove. The counting bar 512 has multiple tear marks 5121 spaced along its length to divide the counting bar 512 into multiple sequentially connected segments. The first magnetic member 513 is disposed on the top of the counting bar 512. The fixing plate 516 protrudes from the lower end of the side wall of the receiving member 511, with one end of the fixing plate 516 away from the side wall of the receiving member 511. A push-button switch 515 is provided. A second magnetic element 514 is slidably connected to a fixed plate 516 along the width direction of the receiving member 511 to trigger the push-button switch 515. The push-button switch 515 is electrically connected to the alarm unit 52. A limiting member 517 is rotatably connected to the receiving member 511. The limiting end of the limiting member 517 can abut against the bottom of the counting bar 512 to limit the counting bar 512 within the receiving groove. A fourth elastic element 522 is provided between the connecting end of the limiting member 517 and the receiving member 511 so that the limiting end tends to approach the bottom of the counting bar 512. A gear 518 is rotatably connected to the receiving member 511 and is located below the opening. An impact rod 520 is coaxially connected to the gear 518, and a slot 521 for accommodating any segment is provided at the end of the impact rod 520 away from the gear 518. A rack 519 is connected to the collection basket 34 and meshes with the gear 518.

[0071] When the collection basket 34 extends, it drives the rack 519 to move downstream of the belt 400. The rack 519 drives the gear 518 to rotate, which in turn drives the impact rod 520 to rotate closer to the bottom of the counting bar 512. The impact rod 520 pushes open the limiting end of the limiting member 517, causing the counting bar 512 to fall. The bottom segment of the counting bar 512 is engaged in the slot 521. After cleaning is completed, the collection basket 34 retracts, driving the rack 519 to move upstream of the belt 400. The rack 519 drives the gear 518 to rotate in the opposite direction, which in turn drives the impact rod 520 to rotate away from the bottom of the counting bar 512. This tears the bottom segment of the counting bar 512 off the counting bar 512 along the tear mark 5121. At the same time, the limiting member 517 resets, and the limiting end abuts against the lower end of the counting bar 512, confining the counting bar 512 within the receiving groove. Each time the belt 400 cleaning process is completed, one segment is torn off. Once all segments on the counting bar 512 have been torn off, the first magnetic component 513 descends to the bottom of the receiving groove, corresponding to the position of the fixing plate 516. The first magnetic component 513 and the second magnetic component 514 generate a magnetic repulsive force, pushing the second magnetic component 514 towards the push-button switch 515 and pressing it to connect the circuit. The alarm unit 52 then randomly activates the alarm. This counting unit 51 does not rely on electrical components or an external power supply; it achieves counting and alarm accumulation entirely through mechanical linkage. This effectively avoids counting errors caused by interference from photoelectric or magnetic sensors in dusty or oily environments. Simultaneously, the remaining number of segments on the counting bar 512 directly reflects the remaining service life, allowing for quick assessment of maintenance needs without the need for instruments or displays, thus reducing the frequency of manual inspections. This solution eliminates the need for circuit layout and waterproof / explosion-proof treatment, which not only reduces manufacturing costs but also enables the device to be reliably applied in harsh working conditions such as coal mines and grain processing plants, where there is high dust, high humidity, or flammable and explosive risks. It has significant advantages in terms of high safety and long service life.

[0072] Optionally, the counting unit 51 may also employ a micro switch and a counter. The micro switch is located at one end of the travel of the material collection basket 34. When the material collection basket 34 extends or retracts into place, it will trigger the micro switch and generate a counting signal. The counter is electrically connected to the micro switch and is used to record the number of count signals. The alarm unit 52 is electrically connected to the counter and is used to issue an alarm when the cumulative number of counts reaches a preset threshold.

[0073] Optionally, the first elastic element 22, the second elastic element 353, the third elastic element 44 and the fourth elastic element 522 may include, but are not limited to, springs or elastic rubber pillars, which are not limited here.

[0074] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A belt tensioning adjustment device, wherein a drive roller (200) and a reversing roller (300) are spaced apart along the length of a frame (100), and the drive roller (200) and the reversing roller (300) jointly tension a belt (400), characterized in that, The belt tension adjustment device includes an adjustment mechanism (1), which includes a sliding member (11), a thermal deformation drive member (12), and a connecting member (13). The sliding member (11) is slidably connected to the frame (100) along the length direction of the frame (100). The reversing roller (300) is rotatably mounted on the sliding member (11). The thermal deformation drive member (12) is spaced below the belt (400). The connecting member (13) is connected between the thermal deformation drive member (12) and the sliding member (11). The thermal deformation drive member (12) is configured to generate heat through friction with the belt (400) and deform under heat, thereby driving the sliding member (11) to move the reversing roller (300) away from the drive roller (200).

2. The belt tension adjustment device according to claim 1, characterized in that, The thermal deformation drive (12) includes a shape memory alloy plate, on which a push block (121) is protruding, and a stop block (131) is protruding on the connector (13) for abutting against the push block (121).

3. The belt tension adjustment device according to claim 1, characterized in that, A feed hopper (500) is provided above the belt (400), and an openable baffle (600) is provided at the discharge port of the feed hopper (500). The output end of the discharge drive (700) is connected to the baffle (600) for driving the baffle (600) to block or open the discharge port. The belt tension adjustment device also includes: The elastic support mechanism (2) includes a base (21) and a first elastic element (22). The base (21) is disposed below the frame (100), and the first elastic element (22) is disposed between the base (21) and the frame (100) so that the height of the belt (400) in the unloaded state is higher than the height in the loaded state. A cleaning mechanism (3) is provided on the base (21) for removing the attachments on the surface of the belt (400), and the cleaning height of the cleaning mechanism (3) is matched with the height of the belt (400) in the unloaded state; The detection mechanism (4) is spaced below the belt (400). The detection height of the detection mechanism (4) is higher than the contact height between the thermal deformation drive (12) and the belt (400). The detection mechanism (4) is signal connected to the unloading drive (700).

4. The belt tension adjustment device according to claim 3, characterized in that, The elastic support mechanism (2) further includes a support member (23) and a movable member (24). The support member (23) is connected to the base (21), and the movable member (24) is connected to the frame (100). The support member (23) and the movable member (24) are slidably connected.

5. The belt tension adjustment device according to claim 3, characterized in that, The cleaning mechanism (3) includes a first mounting part (31) and a cleaning part (32). The first mounting part (31) is erected on the base (21). The cleaning part (32) includes a rotating shaft (321) and a scraper (322). The rotating shaft (321) is rotatably connected to the first mounting part (31) about the width of the frame (100). The scraper (322) is connected to the rotating shaft (321) circumferentially and is used to contact the surface of the belt (400).

6. The belt tension adjustment device according to claim 3, characterized in that, The cleaning mechanism (3) further includes a second mounting component (33), a collection basket (34), and a transmission component (35). The second mounting component (33) is connected to the base (21). The collection basket (34) is located below the belt (400) and is slidably connected to the second mounting component (33) along the length of the frame (100). The transmission component (35) is connected between the frame (100) and the collection basket (34) so ​​that when the frame (100) rises, the transmission component (35) can drive the collection basket (34) to extend downstream of the belt (400). When the frame (100) falls, the transmission component (35) can drive the collection basket (34) to retract to directly below the belt (400).

7. The belt tension adjustment device according to claim 6, characterized in that, The transmission assembly (35) includes a first transmission member (351), a second transmission member (352), and a second elastic member (353). The first transmission member (351) is connected to the frame (100), and the second transmission member (352) is connected to the collection basket (34). The first transmission member (351) has a first inclined surface, which gradually slopes from top to bottom along the running direction of the belt (400). The second transmission member (352) has a second inclined surface that slides and fits against the first inclined surface. The second elastic member (353) is disposed between the collection basket (34) and the second mounting member (33) so that the collection basket (34) tends to retract to directly below the belt (400).

8. The belt tension adjustment device according to claim 6, characterized in that, The belt tension adjustment device also includes an alarm mechanism (5), which includes a counting unit (51) and an alarm unit (52). The counting unit (51) is linked to the collection basket (34) and is used to record the number of times the collection basket (34) switches between the extended position and the retracted position. The alarm unit (52) is signal-connected to the counting unit (51) and is used to issue an alarm signal when the number of switching reaches a preset threshold.

9. The belt tension adjusting device according to any one of claims 3 to 8, characterized in that, The detection mechanism (4) includes a third mounting component (41), a stop component (42), a pressure sensor (43), and a third elastic component (44). The third mounting component (41) is connected to the frame (100). The stop component (42) is spaced below the belt (400) and is slidably connected to the third mounting component (41) in the vertical direction. The third elastic component (44) is located between the third mounting component (41) and the stop component (42). The pressure sensor (43) is located below the stop component (42) and is signal-connected to the feeding drive component (700).

10. A feeding machine, characterized in that, The device includes a frame (100), a drive roller (200), a reversing roller (300), a belt (400), and a belt tensioning adjustment device as described in any one of claims 1 to 9. The drive roller (200) and the reversing roller (300) are spaced apart along the length of the frame (100), and the drive roller (200) and the reversing roller (300) jointly tension the belt (400). A sliding member (11) is slidably connected to the frame (100) along the length of the frame (100). The reversing roller (300) is rotatably mounted on the sliding member (11), the thermal deformation drive member (12) is spaced below the belt (400), and the connecting member (13) is connected between the thermal deformation drive member (12) and the sliding member (11). The thermal deformation drive member (12) is configured to generate heat through friction with the belt (400) and deform under heat, thereby driving the sliding member (11) to move the reversing roller (300) away from the drive roller (200).

Images