CN115072268A - Method for increasing deviation correcting force of rubber belt conveyor - Google Patents
Method for increasing deviation correcting force of rubber belt conveyor Download PDFInfo
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- CN115072268A CN115072268A CN202110273156.7A CN202110273156A CN115072268A CN 115072268 A CN115072268 A CN 115072268A CN 202110273156 A CN202110273156 A CN 202110273156A CN 115072268 A CN115072268 A CN 115072268A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G15/00—Conveyors having endless load-conveying surfaces, i.e. belts and like continuous members, to which tractive effort is transmitted by means other than endless driving elements of similar configuration
- B65G15/60—Arrangements for supporting or guiding belts, e.g. by fluid jets
- B65G15/64—Arrangements for supporting or guiding belts, e.g. by fluid jets for automatically maintaining the position of the belts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G39/00—Rollers, e.g. drive rollers, or arrangements thereof incorporated in roller-ways or other types of mechanical conveyors
- B65G39/10—Arrangements of rollers
- B65G39/12—Arrangements of rollers mounted on framework
- B65G39/16—Arrangements of rollers mounted on framework for aligning belts or chains
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Abstract
The invention discloses a full-automatic passive mechanical linkage deviation correcting device of a rubber belt conveyor, which comprises a frame-shaped frame, a friction wheel and a deviation correcting carrier roller set, wherein the friction wheel is arranged on the frame-shaped frame; the method is characterized in that: the carrier rollers of the deviation rectifying carrier roller group respectively and independently use a small carrier roller frame, and the deviation rectifying carrier roller group also comprises a gear speed reducing mechanism, a screw rod movement mechanism and a rocker linkage mechanism; the conveyer belt and a friction wheel on one side of the deviation generate friction to rotate to drive the speed reducing mechanism, the screw rod motion mechanism and the rocker linkage mechanism, so that the carrier rollers of the deviation correcting carrier roller group simultaneously rotate inwards to form a certain angle with the advancing direction of the conveyer belt to form friction force, and the conveyer belt returns to the original normal position under the oblique guidance of the deviation correcting carrier rollers after being blocked.
Description
Technical Field
The invention relates to a conveyor belt conveyor.
Background
A belt conveyor is called a belt conveyor for short and mainly comprises a conveying belt, a carrier roller, a frame, a transmission device, a tensioning device, a braking device and the like. The continuous bulk material conveying machine is widely applied to industries such as coal mines, power plants, ports, cement plants, coal chemical industry and the like, the most common fault during operation is a conveying belt deviation fault, and particularly, an upper belt (a bearing belt) is easy to deviate. The serious person causes accidents such as tearing and breaking the belt, friction, fire, emergency stop and the like. The reasons for the deviation of the conveyer belt conveyer are many, such as: the falling point of the material is not in the middle of the section of the conveying belt, the head, the tail, the guide roller, the middle frame and the like are not installed correctly, the joint of the conveying belt is not perpendicular to the central line of the conveying belt, the tension in the conveying belt is not uniform, the carrier roller is not flexible to run, the abrasion of the roller is inconsistent, and the deviation of the conveying belt can be caused by the factors of the material and the like existing between the roller and the conveying belt.
Due to the reasons of the belt conveyor, the deviation cannot be avoided, and only additional facilities capable of avoiding the deviation can be installed to solve the deviation problem. At present, the deviation correcting devices of the rubber belt conveyor are various in types and are in different seasons. The present invention relates to a passive hydraulic automatic deviation-correcting device. For example, the "hydraulic conveyor deviation correcting device" is disclosed in "mining technology" volume 36, third phase (7 months 2008) of royal weih, and the like. Take the upper belt (carrying belt) deviation rectifying device of the rubber belt conveyor as an example, it is formed by frame-shaped framework, friction wheel, trough (also called U-shaped) deviation rectifying supporting roller group, hydraulic pump, hydraulic cylinder, valve body program controller; the groove-shaped deviation rectifying carrier roller group is characterized in that three carrier rollers are mounted on a carrier roller frame, two sides of the carrier rollers are symmetrically inclined deviation rectifying rollers, the middle of the carrier rollers is a horizontally arranged deviation rectifying roller, the three carrier rollers are mounted on the same rotatable carrier roller frame, the carrier roller frame is mounted on a longitudinal beam of a frame type frame through a rotating shaft, a piston rod of a hydraulic cylinder is connected to one end of the carrier roller frame, and the piston rod can push and pull the carrier roller frame to rotate horizontally for a certain angle. The working principle is that when the conveying belt deviates, the conveying belt deviates to the friction wheel and is in frictional contact with the friction wheel, the friction wheel rotates under the action of friction force and drives the oil pump to work, oil pressure of the oil pump enables an oil circuit to enter the oil cylinder through valve body program control, the oil cylinder is driven to stretch and retract, the push-pull carrier roller frame horizontally rotates by taking the rotating shaft as an axis, a certain angle is formed between the deviation adjusting carrier roller and the running direction of the conveying belt, friction resistance is generated between the deviation adjusting carrier roller and the conveying belt which is deviating, the conveying belt automatically generates deviation correcting force when being subjected to resistance, and the deviation correcting force keep in centered normal running after being balanced. Its advantages are no need of external power supply, high automation and low cost. However, due to the adoption of a hydraulic principle, a hydraulic transmission link is complex, the failure rate of parts is high, particularly, oil leakage occurs, the oil pressure is reduced, a deviation rectifying effect cannot be realized, and great potential safety hazards are caused under the current unattended management mode; the deviation force is not in direct proportion to the driving force of the oil cylinder, so that unnecessary redundant friction is generated between the deviation adjusting carrier roller and the conveying belt, and the conveying belt is easily damaged; the method has the defects of large initial investment, high cost, large volume, large occupied space and difficult installation; more importantly, the three carrier rollers are arranged on one carrier roller frame, can only rotate at the same angle with the carrier roller frame and are limited by the carrier roller rotating angle of the carrier roller frame, so that the carrier roller rotating angle cannot meet the requirement of deviation rectifying force, cannot play a centering role and still has an accident.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a full-automatic passive mechanical linkage deviation correcting device which is suitable for correcting the deviation of a belt conveyor used in the industries of coal mines, power plants, ports, cement plants, coal chemical industry and the like, ensures that the belt conveyor stably runs, and is also suitable for correcting the deviation of the belt conveyor used in open-air operation places; the deviation problem of the belt conveyor caused by various reasons such as various parts are not correct, the operation is not flexible, the blanking impact and the load change, the tension of the inner section of the conveying belt is not uniform and the like can be solved.
The technical scheme is that the method for increasing the deviation correcting force of the rubber belt conveyor comprises the following steps:
the first step, symmetrically installing gear reduction mechanisms on two sides of a conveying belt of a frame of the rubber belt conveyor, installing friction wheels on an input shaft of the gear reduction mechanisms, wherein the friction wheels are positioned on two sides of the conveying belt which normally runs and can be pressed on the conveying belt when the conveying belt deviates, and enabling the friction wheels to rotate by means of friction force, so that the gear reduction mechanisms obtain power and output the power;
secondly, supporting each carrier roller of a carrier roller group of the rubber belt conveyor, which is adjacent to the front and the back of the friction wheel, by a small carrier roller frame respectively, fixing the small carrier roller frame on a vertical shaft, and installing the vertical shaft in a shaft hole of a frame; a rocker which can rotate the vertical shaft is fixed on the vertical shaft, all rockers are hinged on a connecting rod together to form a rocker linkage mechanism,
thirdly, a screw transmission mechanism is arranged on the rubber belt conveyor frame, and a lead screw of the screw transmission mechanism is connected with a power output shaft of a gear reduction mechanism; the rotary motion of the gear speed reducing mechanism is changed into linear motion, and the rocker is movably connected with the sliding pair of the spiral transmission mechanism, so that the rocker can obtain the push-pull force of the spiral transmission mechanism;
fourthly, when the conveying belt deviates, the conveying belt generates friction with a friction wheel on the deviating side, and the friction wheel rotates to drive a speed reducing mechanism to work; the speed reducing mechanism transmits amplified power to the spiral transmission mechanism, a moving pair of the spiral transmission mechanism moves back to the side away from the deviation, a rocker linkage mechanism is pushed to move, the rocker linkage mechanism enables all supporting rollers of the deviation correcting supporting roller group to simultaneously rotate inwards to form a certain reverse angle with the advancing direction of the conveying belt, friction resistance is formed, the conveying belt returns under the oblique guidance of the deviation correcting supporting rollers after being blocked, if the deviation is continued, the deviation correcting supporting rollers can continue to rotate inwards, the larger the rotating angle is, the larger the formed deviation correcting force is until the deviation correcting force and the deviation correcting force finally reach balance, and the centered operation state is maintained.
The method can be independently processed into the full-automatic passive mechanical linkage deviation correcting device of the rubber belt conveyor. When the device is used, the machine frame of one rubber belt conveyor is dismantled, and the device is replaced. The following technical scheme only takes the correction of the grooved carrier roller group used for the upper belt (bearing belt) of the rubber belt conveyor as an example.
The technical scheme is that the full-automatic passive mechanical linkage deviation correcting device of the rubber belt conveyor comprises a frame-shaped frame, a friction wheel and a deviation correcting carrier roller group; the method is characterized in that: the device also comprises a gear speed reducing mechanism, a lead screw motion mechanism and a rocker linkage mechanism;
the correcting idler group consists of two groups of groove-shaped correcting idler groups which are respectively arranged on the front and rear cross beams of the frame-shaped frame; each carrier roller of the groove-shaped deviation rectifying carrier roller is supported by a small carrier roller frame, a downward shaft is fixed at the center of the small carrier roller frame and is arranged in a shaft hole of a cross beam of the frame-shaped rack through the shaft;
the two sets of gear reduction mechanisms are symmetrically arranged on two sides of the frame-shaped rack, the friction wheels are arranged on an input shaft of the gear reduction mechanisms, the friction wheels are positioned on two sides of the conveying belt which normally runs, and the conveying belt can press the friction wheels to generate friction force to rotate when deviating; the power output shafts of the two sets of gear reduction mechanisms are respectively connected with universal joints used for connecting the screw rod movement mechanisms;
the screw rod movement mechanism is characterized in that two nuts are fixed on the other cross beam of the frame-shaped rack, and matched screw rods are arranged on the two nuts; the lead screw is a hollow lead screw, a spline groove is arranged in a central hole, a spline shaft is respectively arranged at two ends of the lead screw and then connected with the universal joint, so that the power transmission of a lead screw motion mechanism and a gear reduction mechanism is realized; the front section of the spline shaft is required to be a round shaft, and the length of the spline section is equal to the design distance of the lead screw moving back and forth; when the spline shaft drives the lead screw to rotate so as to enable the lead screw to move to a set distance, the lead screw is timely unhooked from the spline hole so as to stop moving, and a round shaft section of the spline shaft is kept connected with the lead screw; the lead screw is also provided with a follower sleeve with a slot through a plane direct-push bearing;
the rocker linkage mechanism is structurally characterized in that a rocker is fixed on a rotating shaft of each small roller frame of a group of deviation rectifying roller sets, all rockers are hinged to a connecting rod together, one rocker extends to a follower sleeve, a shifting fork matched with a follower sleeve slot is arranged at the extending end of each rocker, and the shifting fork is inserted into the slot, so that a lead screw drives the rockers to move together, all rollers of the deviation rectifying roller sets rotate inwards along with the lead screw, and a certain angle is formed between the rollers and the running direction of a conveying belt;
when establishing two sets of bearing roller group of rectifying around, rocker link gear still include: the front and rear groups of small roller frames which correspond to each other are hinged with each other by a push-pull rod, and the hinged point is arranged at the same end of the corresponding small roller frame, so that the two groups of deviation rectifying roller sets are linked;
furthermore, because the two sets of gear reduction mechanisms act on one screw rod together, when the gear reduction mechanism on one side works, the gear reduction mechanism on the other side can be driven to rotate reversely, and in order to reduce unnecessary negative effects, a one-way bearing is arranged on a power output wheel of the gear reduction mechanism, and only a shaft is allowed to rotate but the gear does not rotate; the one-way bearing is a common bearing, can freely rotate in one direction and is locked in the other direction, and is also called as a backstop or an overrunning clutch. Or the power output wheel of the gear speed reducing mechanism is designed into a bicycle flywheel structure.
Further, the reduction ratio of the gear reduction mechanism is (4-6): 1, in order to meet the structural design requirement, the gear reduction mechanism performs two-stage speed reduction by a pair of reduction straight gears and a pair of reduction chain wheels; the specific structure is that the driving gear of the speed reduction straight gear is arranged on the input shaft, the driven straight gear is coaxial with the driving chain wheel of the speed reduction chain wheel, and the driven chain wheel shaft of the speed reduction chain wheel is used as the output shaft of the speed reduction mechanism.
Furthermore, the speed reducing mechanism is sealed in a moisture-proof and corrosion-resistant shell, and the screw rod movement mechanism is sealed in a dust-proof and corrosion-resistant telescopic sleeve so as to adapt to various humid severe environment places, particularly underground coal mines.
Further, the deviation adjusting carrier roller adopts a standard carrier roller of the type according to the type of the rubber belt conveyor.
Furthermore, the circumferential surface (the contact surface with the conveying belt) of the friction wheel adopts a conical surface.
Furthermore, the detection driving wheel is made of polyurethane.
The working principle is that at the position where the conveying belt is easy to deviate, the original frame is dismantled and replaced by the device, when the conveying belt deviates, the conveying belt generates friction with a friction wheel at the deviating side, and the friction wheel rotates to drive a speed reducing mechanism to work; the speed reducing mechanism transmits amplified power to the spline shaft, the spline shaft and the screw rod rotate together (at the moment, the spline shaft on the other side only idles under the unidirectional action), the screw rod moves back to the side away from the deviation under the action of the screw nut while rotating, so that the follower sleeve on the screw rod pushes the rocker linkage mechanism, the rocker linkage mechanism enables the rollers of the deviation correcting roller group to simultaneously rotate inwards to form a certain reverse angle with the advancing direction of the conveying belt to form friction resistance, the conveying belt returns under the oblique guidance of the deviation correcting roller after being blocked, if the deviation correcting roller continues to rotate inwards, the larger the rotating angle is, the larger the formed deviation correcting force is, and the deviation correcting force finally reach balance to maintain the centered running state.
The invention is arranged at the position of the rubber belt conveyor which is easy to deviate, and requires the whole device to be stably arranged and reliably operated.
The invention has the following positive effects:
1. the invention adopts pure mechanical speed reduction and screw linkage driving, compared with the driving adopting a hydraulic principle, the invention has the advantages of flexible and accurate deviation adjustment and quick response, and simultaneously solves the potential safety hazard of oil leakage of a hydraulic system. .
2. Each carrier roller of the deviation adjusting carrier roller group adopts an independent small carrier roller frame, can rotate independently and is not limited by being integrally installed on the whole rack, the rotating angle is large, the larger the rotating angle is, the larger the formed deviation adjusting force is, the larger the friction force is, the larger the guide angle is, the requirement for balancing the deviation force and the deviation adjusting force can be met, and the conveying belt can automatically maintain the centered running state for a long time.
3. The mechanical principle is adopted, the structure is simple, the volume is small, and the installation is convenient; the machine has reliable operation, low failure rate and obvious deviation rectifying effect; after the installation is correctly in place, the requirement of unattended operation and low maintenance on a working site is met on the premise of ensuring the deviation rectifying effect.
Drawings
FIG. 1 is a perspective view of the apparatus of the embodiment, in which an arrow A indicates a running direction of a conveyor belt;
FIG. 2 is a front view of the construction of an embodiment of a groove deflection correcting carrier roller set;
FIG. 3 is a top view of the screw moving mechanism and the rocker linkage mechanism of the embodiment, in which an arrow A indicates a running direction of a conveying belt and an arrow B indicates a deviation direction of the conveying belt;
FIG. 4 is a front view of the gear reduction mechanism and the lead screw movement mechanism of the embodiment;
FIG. 5 is a schematic diagram of an embodiment of the offset adjustment;
in the figure: 1-a frame, 2-a beam, 3-a rear groove-shaped deviation correcting idler group, 3 a-a right rear oblique idler frame, 3 b-a rear horizontal idler frame, 3 c-a left rear oblique idler frame, 4-a front groove-shaped deviation correcting idler group, 4 a-a right front oblique idler frame, 4 b-a front horizontal idler frame, 4 c-a left front oblique idler frame, 5-a friction wheel, 5 a-a front friction wheel, 5 b-a rear friction wheel, 6-a gear speed reducing mechanism, 6 a-a front speed reducing mechanism, 6 b-a rear speed reducing mechanism, 7-a push-pull rod, 7 a-a right push-pull rod, 7 b-a middle rod, 7 c-a left push-pull rod, 8-a connecting rod mechanism, 8 a-a front rocking rod, 8 b-a middle rocking rod, 8 c-a rear rocking rod, 8 d-a connecting rod, 9-lead screw, 10-nut, 11-shaft hole, 12-shaft, 13-reduction box, 14 a-driving gear, 14 b-driven gear, 15 a-driving sprocket, 15 b-driven sprocket, 16 a-right spline shaft, 16 b-left spline shaft, 17-universal joint, 18-middle cross beam, 19-plane thrust bearing, 20-follower sleeve, 21-slot and 22-idle wheel.
Detailed Description
In order that the invention may be described in detail, reference will now be made in detail to the following examples.
The structures, proportions, sizes, and other dimensions shown in the drawings and described in the specification are for understanding and reading the present disclosure, and are not intended to limit the scope of the present disclosure, which is defined in the claims, and are not essential to the art, and any structural modifications, changes in proportions, or adjustments in size, which do not affect the efficacy and attainment of the same are intended to fall within the scope of the present disclosure. In addition, the terms "front and back", "up and down", "left and right", "inside and outside", "middle" and "one" used in the present specification are for convenience of description and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof are considered to be the scope of the present invention without substantial changes in the technical content.
Example 1
A method for increasing the deviation correcting force of a belt conveyor, referring to fig. 1, comprising:
the first step, symmetrically installing gear reduction mechanisms 6 on two sides of a conveying belt of a rubber belt conveyor rack 1, installing friction wheels 5 on input shafts of the gear reduction mechanisms 6, wherein the friction wheels 5 are positioned on two sides of the conveying belt which normally runs and can be pressed on the conveying belt when the conveying belt deviates, and enabling the friction wheels 5 to rotate by means of friction force, so that the gear reduction mechanisms 6 obtain power and output the power;
secondly, supporting each carrier roller of a carrier roller group of the belt conveyor, which is adjacent to the front and the back of the friction wheel 5, by a small carrier roller frame respectively, fixing the small carrier roller frame on a vertical shaft 12, and installing the vertical shaft 12 in a shaft hole 11 of a frame; a rocker 8 which enables the vertical shaft to rotate is fixed on the vertical shaft 12, all the rockers 8 are hinged on a connecting rod together to form a rocker linkage mechanism, and the carrier roller group is transformed into a rear groove-shaped deviation rectifying carrier roller group 3 and a front groove-shaped deviation rectifying carrier roller group 4;
thirdly, a screw transmission mechanism consisting of a lead screw 9 and a nut 10 is installed on the frame 1 of the rubber belt conveyor, the nut 10 is used as a fixed pair, the lead screw 9 is used as a moving pair, the lead screw 9 is connected with a power output shaft of the gear speed reducing mechanism 6 through a spline shaft, so that the rotary motion of the gear speed reducing mechanism 6 is changed into the linear motion of the lead screw 9, a follower sleeve 20 with a slot is also installed on the lead screw 9 through a plane direct-pushing bearing, and the rocker 8 is movably connected with the moving pair lead screw 9 of the screw transmission mechanism of the follower sleeve 20, so that the rocker 8 can obtain the push-pull force of the lead screw 9;
fourthly, referring to fig. 5, when the conveyer belt deviates, the conveyer belt generates friction with the friction wheel 5 on the deviating side, and the friction wheel 5 rotates to drive the speed reducing mechanism 6 to work; the speed reducing mechanism 6 transmits the amplified power to the spiral transmission mechanism, a moving pair (a screw rod 9) of the spiral transmission mechanism moves to the side away from the deviation, all rocker rods of the rocker linkage mechanism are pushed, so that the carrier rollers of the deviation correcting carrier roller group (comprising the rear groove-shaped deviation correcting carrier roller group 3 and the front groove-shaped deviation correcting carrier roller group 4) simultaneously rotate towards the inner plane, a certain reverse angle is generated with the advancing direction of the conveying belt, friction resistance is formed, the conveying belt returns under the oblique guidance of the deviation correcting carrier rollers after being blocked, if the deviation is continued, the deviation correcting carrier rollers can continue to rotate inwards, the larger the rotating plane angle is, the larger the formed deviation correcting force is, until the deviation force and the deviation correcting force finally reach balance, and the centered running state is maintained.
Further, the inward rotation of the carrier roller refers to the rotation of the carrier roller around the small carrier roller frame shaft in the length direction by a certain plane angle, and cannot be mistakenly interpreted as the rolling rotation of the carrier roller.
Example 2
Referring to fig. 1-4, embodiment 2 is a structural diagram of a full-automatic passive mechanical linkage deviation rectifying device of a rubber belt conveyor, which is composed of two groups of groove-shaped deviation rectifying carrier roller groups (each group comprises three carrier rollers).
As shown in fig. 1, it comprises a frame-shaped frame, a friction wheel 5, a rear groove-shaped deviation rectifying carrier roller group 3 and a front groove-shaped deviation rectifying carrier roller group 4; the front groove-shaped deviation rectifying carrier roller group 4 and the rear groove-shaped deviation rectifying carrier roller group 3 are arranged on the frame-shaped rack in tandem; the frame-shaped frame consists of two longitudinal beams 1 parallel to the direction of the conveying belt, a cross beam 2 connecting the two longitudinal beams 1 and a middle cross beam 18; the beam 2 is provided with a shaft hole 11 for supporting the deviation rectifying carrier roller group; the deviation-adjusting carrier rollers (comprising inclined deviation-adjusting rollers at two sides and a horizontal deviation-adjusting roller in the middle) adopt standard carrier rollers with the same model according to the model of the rubber belt conveyor; the circumferential surface (the contact surface with the conveying belt) of the friction wheel 5 adopts a conical surface structure and is made of polyurethane.
The front groove-shaped deviation rectifying carrier roller group 4 and the rear groove-shaped deviation rectifying carrier roller group 3 are both split, namely, the inclined deviation rectifying rollers at the two sides and the horizontal deviation rectifying roller in the middle of the front groove-shaped deviation rectifying carrier roller group and the rear groove-shaped deviation rectifying carrier roller group are respectively and independently used as a small carrier roller frame; as shown in fig. 2, the small carrier roller frame of the rear groove-shaped deviation rectifying carrier roller group 3 comprises a right rear oblique carrier roller frame 3a, a left rear oblique carrier roller frame 3c and a middle rear horizontal carrier roller frame 3b, and each small carrier roller frame is respectively installed on the shaft hole 11 corresponding to the cross beam through a rotating shaft 12.
The device also comprises a gear reduction mechanism 6, a lead screw motion mechanism and a rocker linkage mechanism.
The gear speed reducing mechanism 6 is provided with two sets, namely a front speed reducing mechanism 6a and a rear speed reducing mechanism 6b, which are symmetrically arranged between the two groove-shaped deviation rectifying carrier roller sets; the friction wheels 5, namely the front friction wheel 5a and the rear friction wheel 5b are respectively arranged on the front speed reducing mechanism 6a and the rear speed reducing mechanism 6 b; the power output shafts of the two sets of gear reduction mechanisms 6 are respectively connected with the two ends of the screw rod movement mechanism through universal joints 17 so as to realize variable-angle power transmission.
The lead screw movement mechanism is shown in fig. 4 and comprises a nut 10 and a matched lead screw 9; two nuts 10 are arranged and respectively fixed on the middle cross beam 18 of the frame-shaped frame; the surface of the lead screw 9 is provided with an external thread matched with the screw nut 10 and is arranged in the two screw nuts 10; the screw 9 is a hollow screw, a spline is arranged in a central hole, a section is respectively arranged from two ends, and the right spline shaft 16a and the left spline shaft 16b are respectively connected with the adjacent universal joints 17 to realize power transmission with the gear speed reducing mechanism 6; the front end of the spline shaft is required to be a round shaft, and the length of the spline part is required to meet the requirement of the distance for the spline shaft 16 to drive the screw rod 9 to move back and forth; the purpose is that when the spline shaft 16 drives the screw rod 9 to rotate so that the screw rod 9 moves to a certain distance, the screw rod is timely unhooked from the spline hole, the screw rod 9 is not moved any more, and the front end of the spline shaft 16 is still in the spline hole and cannot be separated from the screw rod 9; a follower sleeve 20 with a slot 21 is further arranged in the middle of the lead screw 9, the follower sleeve 20 is connected with the lead screw 9 through a plane thrust bearing 19, and the follower sleeve 20 is used for being connected with a middle rocker 8b of the rocker linkage mechanism; when the follower sleeve 20 moves back and forth, each carrier roller of the two groove-shaped deviation rectifying carrier roller groups is driven to synchronously rotate inwards respectively, and a certain angle is formed between the carrier rollers and the running direction of the conveying belt; the rocker linkage mechanism is structurally characterized in that a right rocker 8a, a middle rocker 8b and a left rocker 8c are respectively arranged on a rotating shaft 12 below each small roller frame (comprising a right rear inclined roller frame 3a, a left rear inclined roller frame 3c and a middle rear horizontal roller frame 3 b) of the rear groove type deviation rectifying roller group 3, and the three rockers are jointly hinged on a connecting rod 8d to form a four-connecting-rod mechanism; the middle rocker 8b extends to the position of the follower sleeve 20, a shifting fork matched with the follower sleeve slot 21 is arranged at the extending end, and the shifting fork is inserted into the slot 21 so as to realize that the lead screw movement mechanism drives the rocker linkage mechanism to move;
the rocker linkage mechanism also comprises three small roller frames (comprising a right rear inclined roller frame 3a, a left rear inclined roller frame 3c and a middle rear horizontal roller frame 3 b) of the rear groove type deviation rectifying roller group 3 and three small roller frames (comprising a right front inclined roller frame 4a, a left front inclined roller frame 4c and a middle front horizontal roller frame 4 b) of the front groove type deviation rectifying roller group 4 are respectively hinged with a push-pull rod (comprising a right push-pull rod 7a, a middle push-pull rod 7b and a left push-pull rod 7 c) through corresponding mutual connection, and the hinge joint is arranged at the same end of the corresponding small roller frame, so that the two groove type deviation rectifying roller groups (the front groove type deviation rectifying roller group 4 and the rear groove type deviation rectifying roller group 3) are linked.
Further, the reduction ratio of the gear reduction mechanism is (4-6): 1, in order to meet the structural design requirements, the gear speed reducing mechanism 6 performs two-stage speed reduction by a pair of speed reducing spur gears and a pair of speed reducing chain wheels as shown in fig. 4; the specific structure is that a driving gear 14a of a speed reduction spur gear is arranged on an input shaft, a driven spur gear 14b is coaxial with a driving sprocket 15a of a speed reduction sprocket, and a driven sprocket 15b shaft of the speed reduction sprocket is used as an output shaft of the speed reduction mechanism 6; the speed reducing mechanism 6 is sealed in a moisture-proof and corrosion-resistant shell 13, and meets the use requirements of various humid and severe environment places, particularly underground coal mines.
Furthermore, because the two sets of gear reduction mechanisms act on one screw rod together, when the gear reduction mechanism on one side works, the gear reduction mechanism on the other side can be driven to rotate reversely, and in order to reduce unnecessary negative effects, a one-way bearing is arranged on a power output wheel (a driven chain wheel 15b in fig. 4) shaft of the gear reduction mechanism, and only the shaft is allowed to rotate but the gear does not rotate; the one-way bearing is a common bearing, can freely rotate in one direction and is locked in the other direction, and is also called as a backstop or an overrunning clutch. Or the power output wheel (driven chain wheel 15b in fig. 4) of the gear speed reducing mechanism is designed into a flywheel structure of the bicycle.
When the screw rod 9 is a positive thread, in order to return the input shaft and the output shaft of the left gear speed reducing mechanism, the screw rod needs to rotate in the same direction, so that the driving spur gear and the driven spur gear of the speed reducing spur gear need to be driven through the intermediate gear 22 to realize the rotation in the same direction; and vice versa.
Claims (8)
1. A method for increasing the deviation correcting force of a rubber belt conveyor is characterized by comprising the following steps:
the first step, symmetrically installing gear reduction mechanisms on two sides of a conveying belt of a frame of the rubber belt conveyor, installing friction wheels on an input shaft of the gear reduction mechanisms, wherein the friction wheels are positioned on two sides of the conveying belt which normally runs and can be pressed on the conveying belt when the conveying belt deviates, and enabling the friction wheels to rotate by means of friction force, so that the gear reduction mechanisms obtain power and output the power;
secondly, supporting each carrier roller of a carrier roller group of the rubber belt conveyor, which is adjacent to the front and the back of the friction wheel, by a small carrier roller frame respectively, fixing the small carrier roller frame on a vertical shaft, and installing the vertical shaft in a shaft hole of a frame; a rocker which can rotate the vertical shaft is fixed on the vertical shaft, all rockers are hinged on a connecting rod together to form a rocker linkage mechanism,
thirdly, a screw transmission mechanism is arranged on the rubber belt conveyor frame, and a lead screw of the screw transmission mechanism is connected with a power output shaft of a gear reduction mechanism; the rotary motion of the gear speed reducing mechanism is changed into linear motion, and the rocker is movably connected with the sliding pair of the spiral transmission mechanism, so that the rocker can obtain the push-pull force of the spiral transmission mechanism;
fourthly, when the conveying belt deviates, the conveying belt generates friction with a friction wheel on the deviating side, and the friction wheel rotates to drive a speed reducing mechanism to work; the speed reducing mechanism transmits amplified power to the spiral transmission mechanism, a moving pair of the spiral transmission mechanism moves back to the side away from the deviation, a rocker linkage mechanism is pushed to move, the rocker linkage mechanism enables each carrier roller of the deviation correcting carrier roller group to simultaneously rotate inwards to form a certain reverse angle with the advancing direction of the conveying belt, friction resistance is formed, the conveying belt returns under the oblique guidance of the deviation correcting carrier roller after being blocked, if the deviation is continued, the deviation correcting carrier roller continues to rotate inwards, the larger the rotation angle is, the larger the formed deviation correcting force is until the deviation force and the deviation correcting force finally reach balance, and the centered operation state is maintained.
2. A full-automatic passive mechanical linkage deviation correcting device of a rubber belt conveyor comprises a frame-shaped frame, a friction wheel and a deviation correcting carrier roller set; the method is characterized in that: the device also comprises a gear speed reducing mechanism, a lead screw motion mechanism and a rocker linkage mechanism;
the deviation rectifying carrier roller group consists of two groups of groove-shaped deviation rectifying carrier roller groups which are respectively arranged on the front cross beam and the rear cross beam of the frame-shaped rack; each carrier roller of the groove-shaped deviation rectifying carrier roller is supported by a small carrier roller frame, a downward shaft is fixed at the center of the small carrier roller frame and is arranged in a shaft hole of a cross beam of the frame-shaped rack through the shaft;
the two sets of gear speed reducing mechanisms are symmetrically arranged on the front side and the rear side of the frame-shaped rack, the friction wheels are arranged on an input shaft of the gear speed reducing mechanisms and are positioned on the two sides of the conveying belt which normally runs, and the conveying belt can press the friction wheels to generate friction force to rotate when deviating; the power output shafts of the two sets of gear reduction mechanisms are respectively connected with universal joints used for connecting the screw rod movement mechanisms;
the screw rod movement mechanism is characterized in that two nuts are fixed on the other cross beam of the frame-shaped rack, and matched screw rods are arranged on the two nuts; the lead screw is a hollow lead screw, a spline groove is arranged in a central hole, a spline shaft is respectively arranged at two ends of the lead screw and then connected with the universal joint, so that the power transmission of a lead screw motion mechanism and a gear reduction mechanism is realized; the front section of the spline shaft is required to be a round shaft, the length of the spline section is equal to the design distance of the lead screw moving back and forth, when the spline shaft drives the lead screw to rotate so that the lead screw moves to the set distance, the lead screw is timely unhooked from the spline hole to stop moving, and the round shaft section is still in the central hole of the lead screw phase; the lead screw is also provided with a follower sleeve with a slot through a plane direct-push bearing;
the rocker linkage mechanism is structurally characterized in that a rocker is fixed on a rotating shaft of each small roller frame of a group of deviation rectifying roller sets, all the rockers are hinged to a connecting rod together, one rocker extends to a follower sleeve, a shifting fork matched with a slot of the follower sleeve is arranged at the extending end of the rocker, the shifting fork is inserted into the slot, a lead screw drives the rockers to move together, and the rocker drives all the rollers of the deviation rectifying roller sets to rotate inwards to form a certain angle with the running direction of a conveying belt.
3. The apparatus of claim 2 wherein the power take-off wheel of the gear reduction mechanism is provided with a one-way bearing to allow only rotation of the gear but not rotation of the shaft.
4. The apparatus of claim 2 wherein the power take-off wheel of the gear reduction mechanism is a bicycle freewheel structure that only allows rotation of the gear but not the shaft.
5. The full-automatic passive mechanical linkage deviation correcting device of the belt conveyor as claimed in claim 2, wherein the reduction ratio of the gear reduction mechanism is (4-6): the gear speed reducing mechanism performs two-stage speed reduction by a pair of speed reducing straight gears and a pair of speed reducing chain wheels.
6. The full-automatic passive mechanical linkage deviation correcting device of any belt conveyor of claims 2-5, wherein the speed reducing mechanism is enclosed in a moisture-proof and rust-resistant housing, and the lead screw motion mechanism is enclosed in a dust-proof and rust-resistant telescopic sleeve.
7. A full-automatic passive mechanical linkage deviation correcting device of any belt conveyor as claimed in claims 2-5, wherein the idler is a standard idler of the same type as the belt conveyor to be corrected.
8. A full-automatic passive mechanical linkage deviation-correcting device of a belt conveyor as claimed in any one of claims 2-5, wherein said friction wheel is made of polyurethane material into a conical shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110273156.7A CN115072268A (en) | 2021-03-14 | 2021-03-14 | Method for increasing deviation correcting force of rubber belt conveyor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110273156.7A CN115072268A (en) | 2021-03-14 | 2021-03-14 | Method for increasing deviation correcting force of rubber belt conveyor |
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| CN115072268A true CN115072268A (en) | 2022-09-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110273156.7A Withdrawn CN115072268A (en) | 2021-03-14 | 2021-03-14 | Method for increasing deviation correcting force of rubber belt conveyor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117509007A (en) * | 2023-12-19 | 2024-02-06 | 唐山市德越冶金设备有限公司 | Guide wheel adjusting device |
-
2021
- 2021-03-14 CN CN202110273156.7A patent/CN115072268A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117509007A (en) * | 2023-12-19 | 2024-02-06 | 唐山市德越冶金设备有限公司 | Guide wheel adjusting device |
| CN117509007B (en) * | 2023-12-19 | 2024-04-23 | 唐山市德越冶金设备有限公司 | Guide wheel adjusting device |
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Application publication date: 20220920 |