Roller adjusting mechanism of belt conveyor

Abstract

The utility model provides a belt conveyor roller adjusting mechanism which comprises a frame body, a roller sleeved with a belt is arranged on the frame body in a sliding mode, a roller shaft with the two ends extending out of the roller is arranged in the roller, and the two ends of the roller shaft are respectively connected with a linear driving mechanism. The device is characterized in that positioning mechanisms are arranged at the two ends, corresponding to the roller shafts, of the frame body, and the positioning mechanisms prevent the rollers on the corresponding sides from axially moving towards the side close to the belt. After the central position of the belt is adjusted through the linear driving mechanism, the positioning mechanism is arranged to fix the roller, and the belt can be kept at a proper position for a long time.

Description

Technical Field

[0001] The utility model belongs to the field of coal mining equipment, and in particular relates to a belt conveyor roller adjustment mechanism. Background Art

[0002] The self-moving tail of a belt conveyor is a mobile device designed specifically for fully mechanized coal mining and excavation working faces. It is used in conjunction with a belt conveyor and a transfer machine to meet the rapid advancement needs of high-yield and high-efficiency working faces. This equipment not only has functions such as belt deviation adjustment, height adjustment, and transfer machine push direction correction, but also has the ability to move forward on its own, thus ensuring smooth chute transfer. When in use, the self-moving tail of a belt conveyor is actually part of the belt conveyor. The belt conveyor head roller is equipped with a drive unit called the drive roller; the rotating end of the tail is the roller of the self-moving tail of the belt conveyor. The two rollers support the running belt to transport materials.

[0003] Belt conveyor deviation is a common problem, affecting the normal transportation of materials and hindering the development of coal mining. The existing self-moving tail roller of the belt conveyor, as the other rotating end of the belt, also plays an important role in the adjustment of the belt. The current structure of the self-moving tail roller of the belt conveyor is completely fixed on the tail frame and cannot be adjusted. Errors in the manufacturing and installation of the roller, external force impacts during material transportation, deformation and dislocation of the machine body due to uneven roadway floors, etc., gradually accumulate and easily cause conveyor belt deviation.

[0004] During the operation of belt conveyors, deviation occurs frequently. If it is not adjusted in time, it will be extremely harmful. First, deviation shortens the service life of the equipment. Unstable operating conditions will accelerate the wear of mechanical components, especially core components such as rollers and idlers, which are closely connected to the conveyor belt. Due to high-frequency vibration and friction, the wear resistance of parts is significantly reduced, and frequent maintenance and replacement are required. Secondly, deviation will cause a decrease in carrying capacity. When the conveyor belt deviates from the predetermined route, its carrying capacity is affected, resulting in a decrease in the actual efficiency of the belt in carrying materials and affecting the operating efficiency of the production line. Thirdly, deviation will also bring safety issues and energy waste. The instability of the conveyor belt movement may cause safety accidents, such as material leakage and equipment blockage, which may threaten the safety of operators and equipment.

[0005] Patent CN201439446U discloses an automatic belt-tensioning and compensating hydraulic tensioning device. The two bearing seats of a sliding roller are connected to two hydraulic cylinders, which drive the two ends of the sliding roller to move, thereby changing the position of the sliding roller to tension the belt and adjust the belt's deviation. However, although the hydraulic cylinders have a large pulling force, their position is not stable and precise. When the hydraulic cylinders are used for a long time or in an environment with strong external forces, their position is prone to change, which can affect the position of the belt. Therefore, a roller adjustment mechanism that can correct the belt's deviation and provide a more stable position is needed. Summary of the Invention

[0006] The utility model provides a belt conveyor roller adjusting mechanism.

[0007] The purpose of the utility model is achieved in the following way: a belt conveyor roller adjustment mechanism, including a frame, a roller with a belt slidingly arranged on the frame, a roller shaft with two ends extending out of the roller is arranged in the roller, and the two ends of the roller shaft are respectively connected to a linear drive mechanism; it is characterized in that: positioning mechanisms are provided on the two ends of the frame corresponding to the roller shaft, and the positioning mechanisms prevent the roller shaft on the corresponding side from moving toward the side close to the belt.

[0008] The positioning mechanism includes a spiral transmission mechanism arranged on the frame, and the spiral transmission mechanism includes a screw cavity fixedly arranged on the frame and a screw connected to the screw cavity by a thread, and the screw cavity and the screw are arranged on the side of the roller shaft close to the belt; the top end of the screw moves forward and backward to tighten and loosen the roller shaft.

[0009] An auxiliary hole is provided at the tail end of the screw.

[0010] The left and right sides of the frame are respectively provided with slides for supporting the roller shaft and allowing the roller shaft to slide back and forth. A seat sliding cavity is provided on the frame on either the left or right side of the slide. A seat is slidably provided in the seat sliding cavity, and both ends of the roller shaft respectively pass through or are provided in the seat on the corresponding side; in the working state, the top end of the screw is pressed against the front surface of the seat.

[0011] The roller is arranged at the tail of the belt conveyor, the roller is rotatably arranged on the roller shaft, and a positioning cavity for accommodating the roller shaft is provided on the base body; the cross-section of the part of the roller shaft located in the positioning cavity is not circular, the roller shaft cooperates with the positioning cavity and cannot rotate.

[0012] The linear drive mechanism is arranged on a frame located on the side of the roller shaft away from the belt; the linear drive mechanism is an oil cylinder, one end of the oil cylinder is arranged on the frame, and the other end is connected to the base.

[0013] The middle part of the drum is cylindrical, and the two side parts are cones, and the farther away from the center, the thinner the drum is.

[0014] Position sensors are respectively provided on both end surfaces of the roller, and the position sensors are electrically connected to a controller.

[0015] Compared with the prior art, the present invention adjusts the center position of the belt through a linear drive mechanism, and then sets a positioning mechanism to fix the roller, so that the belt can be kept in a suitable position for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structural principle of the utility model.

[0017] Figure 2 It is a schematic diagram of the frame.

[0018] Figure 3 This is the other side view of the frame.

[0019] Figure 4 It is a schematic diagram of the seat.

[0020] Figure 5 It is a schematic diagram of the roller.

[0021] Figure 6 It is a schematic diagram of a screw.

[0022] Figure 7 This is a schematic diagram of the whole (with the cover hidden).

[0023] Figure 8 This is a sectional view of the tail of the self-propelled machine.

[0024] Among them, 1 is the frame, 2 is the roller, 3 is the roller shaft, 4 is the cylinder, 5 is the screw, 50 is the auxiliary hole, 6 is the screw cavity, 7 is the base, 70 is the positioning cavity, 8 is the base sliding cavity, 9 is the slide, 10 is the cover, and 11 is the upper cover. DETAILED DESCRIPTION

[0025] In this utility model, unless otherwise specified or limited, the technical terms used herein shall have the ordinary meanings understood by persons skilled in the art to which this utility model relates. Terms such as "connected," "connected," "fixed," and "disposed" should be interpreted broadly and may refer to fixed, removable, or integral connections; direct or indirect connections through an intermediary; and mechanical or electrical connections. Unless otherwise specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact or indirect contact through an intermediary. Furthermore, a first feature being "above," "above," or "above" a second feature may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. A first feature being "below," "below," or "below" a second feature may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature. Relational terms such as first and second are used solely to distinguish one entity or operation from another and do not necessarily require or imply any actual relationship or order between these entities or operations. The terms used in the description, such as "center", "transverse", "longitudinal", "length", "width", "thickness", "height", "front", "back", "left", "right", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", "clockwise", "counterclockwise", etc., to indicate the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, be constructed and operate in a specific orientation.

[0026] The following will combine the accompanying drawings and specific embodiments to clearly and completely describe the technical solution of the present invention. Figure 1-8The figure shows an adjustment mechanism for a belt conveyor roller 2. The mechanism comprises a frame 1, on which a roller 2, covered with a belt, is slidably mounted. A roller shaft 3, with both ends extending from the roller 2, is disposed within the roller 2. Each end of the roller shaft 3 is connected to a linear drive mechanism. Positioning mechanisms are provided on the frame 1, corresponding to both ends of the roller shaft 3. These positioning mechanisms prevent the roller shaft 3 on the corresponding side from moving toward the belt. In practice, belts are provided on both the front and rear sides of the roller shaft 3, but one side includes the majority of the belt, while the other side only includes half a circle of the belt wrapped around the roller 2. For purposes of distinction, the side including the majority of the belt is the side closest to the belt, and the side including the semicircle of the belt is the side away from the belt. Here, if the roller shaft 3 rotates with the roller 2, it can be indirectly connected to the linear drive mechanism via other components, such as bearings or bearing seats. If the roller 2 does not rotate, the roller shaft 3 can be directly connected to the linear drive mechanism or connected to the linear drive mechanism via other components. The linear drive mechanism can be located on the side closest to the belt or away from the belt. When the belt is operating, the roller 2 is likely to move toward the belt due to force. After the center position of the belt is adjusted using the linear drive mechanism, a positioning mechanism is provided to secure the roller shaft 3, ensuring that the belt remains in the proper position for a long period of time. The positioning mechanism can be a conventional positioning mechanism, such as a screw-nut mechanism, a screw 5 mechanism, a positioning pin, a clamp, etc., and will not be described in detail here. Two positioning mechanisms are provided on either side of the frame 1, corresponding to the portion of the roller shaft 3.

[0027] The positioning mechanism includes a spiral transmission mechanism arranged on the frame 1, and the spiral transmission mechanism includes a screw chamber 6 fixedly arranged on the frame and a screw 5 connected to the screw chamber 6 by a thread. The screw chamber 6 and the screw 5 are arranged on the side of the roller shaft 3 close to the belt; the top end of the screw 5 moves forward and backward to tighten and loosen the roller shaft 3. The front and back directions here are the length directions of the belt. The front can be the direction toward the other roller 2 of the belt conveyor. The spiral transmission mechanism is arranged on the frame 1 through the screw chamber 6. The screw chamber 6 is fixed and the screw 5 is moved forward and backward by rotating the screw 5. The spiral transmission mechanism can also be a common structural form such as a screw and nut mechanism. These structures are all within the protection scope of the present utility model.

[0028] The tail end of the screw rod 5 is provided with an auxiliary hole 50. The auxiliary hole 50 can be provided in plurality along the circumference. The auxiliary hole 50 can be inserted with a rod-shaped object to assist in turning the screw rod 5 using the principle of leverage.

[0029] Slideways 9 for supporting the roller shaft 3 and allowing the roller shaft 3 to slide forward and backward are respectively provided on the left and right sides of the frame 1. A seat sliding cavity 8 is provided on the frame 1 on either the left or right side of the slideway 9. A seat 7 is slidingly provided in the seat sliding cavity 8, and both ends of the roller shaft 3 pass through or are provided in the seat 7 on the corresponding side; in the working state, the top end of the screw 5 presses against the front surface of the seat 7. Depending on whether the roller 2 is an active roller 2 or a driven roller 2, the roller shaft 3 can be rotatably provided or fixedly provided in the seat 7. Baffles for limiting the seat 7 are provided on the left and right sides of the seat sliding cavity 8, so that the seat 7 can only move forward and backward. The upper surface of the baffle on the side of the seat sliding cavity 8 close to the roller can be the surface of the slideway 9.

[0030] The roller 2 is arranged at the tail of the belt conveyor, and the roller 2 is rotatably arranged on the roller shaft 3. A positioning cavity 70 for accommodating the roller shaft 3 is provided on the seat 7; the cross section of the portion of the roller shaft 3 located in the positioning cavity 70 is not circular, and the roller shaft 3 cooperates with the positioning cavity 70 and cannot rotate. Here, the cross section of the portion of the roller shaft 3 located in the positioning cavity 70 can be semicircular or other shapes. The shape of the positioning cavity 70 can correspond to the shape of the roller shaft 3, or be rectangular, etc. As long as it satisfies the requirement that the roller shaft 3 cannot rotate in the positioning cavity 70. If the roller 2 in the utility model is the head roller 2, then the roller shaft 3 rotates together with the roller 2. Then a bearing is provided on the roller shaft 3, and the bearing sleeve is in the seat 7. Or the seat 7 is a bearing seat.

[0031] The linear drive mechanism is arranged on the frame 1 on the side of the roller shaft 3 away from the belt; the linear drive mechanism is a cylinder 4, one end of which is arranged on the frame 1 and the other end is connected to the base 7. The base 7 is provided with a fixing hole for the cylinder 4 for fixing the other end of the cylinder 4.

[0032] The middle part of the drum 2 is cylindrical, and the two side parts are conical, and become thinner as they get farther away from the center. The tapering shape of the two side parts of the drum 2 allows the belt to be adjusted more quickly after the position of the drum 2 is adjusted.

[0033] Position sensors are installed on each end face of the drum 2, each electrically connected to a controller. If the belt deviates from the position of either end face of the drum 2, the position sensor sends a signal to the controller, which in turn issues an alarm, alerting staff that the belt needs to be adjusted. Alternatively, staff can conduct regular patrols and make adjustments if they detect belt deviation. Furthermore, a cover 10 and an upper lid 11 are located above the drum 2, each positioned above the frame 1.

[0034] In practice, upon receiving an alarm or discovering that roller 2 needs adjustment, staff will extend or retract cylinder 4 to adjust the belt. Assuming the belt is currently deflected toward side A, to prevent it from further deflecting, cylinder 4 on side A needs to be retracted, pulling seat 7. Seat 7 encloses roller shaft 3, pulling roller shaft 3 backward, and then screwing screw 5 on side A deeper into position. On side B, screw 5 is first unscrewed a certain distance. Then, cylinder 4 on side B extends, pushing seat 7. Seat 7 encloses roller shaft 3, pushing roller shaft 3 forward until the desired distance is reached, and screwing screw 5 on side B into position. By tightening the belt on side A and loosening the belt on side B, the center axis of roller 2 is no longer aligned at 90 degrees with the direction of belt travel. The conical surfaces of roller 2, coupled with the continuous rotation of the belt, can cause uneven tension on both sides, causing the belt to slowly shift toward side B. This effectively adjusts the belt's position. The deviation can be measured and adjusted once. Multiple fine-tuning is also possible. Each time the oil cylinder 4 is extended or retracted, you can try to adjust it by about 20 mm, or set another value as needed. If it still deviates after adjustment, you can continue to extend and retract until the belt moves to the appropriate position.

[0035] The technical features of the above-described embodiments may be combined in any manner, and as long as there are no contradictions in the combination of these technical features, they shall be deemed to be within the scope of this specification. Without departing from the overall concept of the present invention, the technical solutions of the present invention, their equivalent replacements or modifications, and certain changes and improvements made thereto shall also be deemed to be within the scope of protection of the present invention.

Claims

1. A belt conveyor roller adjustment mechanism, comprising a frame, a roller with a belt slidably mounted on the frame, a roller shaft with two ends extending out of the roller, and a linear drive mechanism connected to each end of the roller shaft; characterized in that: Positioning mechanisms are provided on the frame at both ends corresponding to the roller shaft, and the positioning mechanisms prevent the roller shaft on the corresponding side from moving toward the side close to the belt.

2. A belt conveyor roller adjustment mechanism according to claim 1, characterized in that: The positioning mechanism includes a spiral transmission mechanism arranged on the frame, and the spiral transmission mechanism includes a screw cavity fixedly arranged on the frame and a screw connected to the screw cavity by a thread, and the screw cavity and the screw are arranged on the side of the roller shaft close to the belt; the top end of the screw moves forward and backward to tighten and loosen the roller shaft.

3. A belt conveyor roller adjustment mechanism according to claim 2, characterized in that: An auxiliary hole is provided at the tail end of the screw.

4. The belt conveyor roller adjustment mechanism according to claim 2, characterized in that: The left and right sides of the frame are respectively provided with slides for supporting the roller shaft and allowing the roller shaft to slide back and forth. A seat sliding cavity is provided on the frame on either the left or right side of the slide. A seat is slidably provided in the seat sliding cavity, and both ends of the roller shaft respectively pass through or are provided in the seat on the corresponding side; in the working state, the top end of the screw is pressed against the front surface of the seat.

5. The belt conveyor roller adjustment mechanism according to claim 4, characterized in that: The roller is arranged at the tail of the belt conveyor, the roller is rotatably arranged on the roller shaft, and a positioning cavity for accommodating the roller shaft is provided on the base body; the cross-section of the part of the roller shaft located in the positioning cavity is not circular, the roller shaft cooperates with the positioning cavity and cannot rotate.

6. The belt conveyor roller adjustment mechanism according to claim 5, characterized in that: The linear drive mechanism is arranged on a frame located on the side of the roller shaft away from the belt; the linear drive mechanism is an oil cylinder, one end of the oil cylinder is arranged on the frame, and the other end is connected to the base.

7. The belt conveyor roller adjustment mechanism according to claim 1, characterized in that: The middle part of the drum is cylindrical, and the two side parts are cones, and the farther away from the center, the thinner the drum is.

8. A belt conveyor roller adjustment mechanism according to any one of claims 1 to 6, characterized in that: Position sensors are respectively provided on both end surfaces of the roller, and the position sensors are electrically connected to a controller.

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