Self-adapting tensioning device for belt conveyor

Abstract

The utility model discloses a kind of self-adapting tensioning devices for belt conveyor, including travelling trolley, the travelling trolley is limit activity and is set on underframe, tensioning drum is set on the travelling trolley, the travelling trolley is set with the positioning mechanism matched with underframe, the positioning mechanism includes the positioning end contacted with underframe and the bidirectional screw used to drive the positioning end to move. The utility model through the positioning mechanism of independent design, has got rid of the dependence on brake function of driving system self, realizes the active positioning locking of travelling trolley, the positioning mechanism is driven positioning end and underframe closely by bidirectional screw, cooperate rubber pad to increase friction coefficient, locking reliability significantly improves, effectively solve the problem that traditional device locking is unreliable, extreme working condition is easy to fail, meet the rigid fixing demand of equipment overhaul, fault emergency and other scenes.

Description

Technical Field

[0001] This utility model relates to the field of belt conveyor technology, specifically to an adaptive tensioning device for belt conveyors. Background Technology

[0002] The self-adaptive tensioning device for belt conveyors is a dynamic tension adjustment device used for belt conveyors. Its core function is to automatically sense the belt's operating status (such as tension changes, slippage, and deviation) and adjust the belt tension in real time to ensure that the belt is always in the optimal working tension range, avoiding equipment failure and efficiency reduction caused by excessive tension or looseness. It is a key auxiliary component of the belt conveyor transmission system and is widely used in industries such as mining, ports, chemicals, and metallurgy that rely on belt conveyors for material transportation.

[0003] The core design of existing adaptive tensioning devices for trolley-type belt conveyors focuses on "dynamic adaptive adjustment." The trolley needs to move flexibly in response to real-time fluctuations in belt tension. Therefore, they generally do not have an independent "forced locking mechanism" and lack the ability to fix the position at any time and reliably. Only a few devices rely on the braking function of the drive mechanism (such as hydraulic locks or motor brakes) to achieve "passive positioning." However, this positioning method is limited by the performance of the drive system itself and has problems such as insufficient locking reliability, limited positioning accuracy, and easy failure under extreme working conditions. It is difficult to meet the rigid requirements of equipment maintenance, emergency response, and precise debugging, which constitutes a significant functional shortcoming. Utility Model Content

[0004] The purpose of this invention is to provide an adaptive tensioning device for belt conveyors to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: An adaptive tensioning device for a belt conveyor includes a traveling trolley, which is movably and limit-positioned on a base frame. The traveling trolley is equipped with a tensioning roller and a positioning mechanism that cooperates with the base frame. The positioning mechanism includes a positioning end that contacts the base frame and a bidirectional lead screw for driving the positioning end to move.

[0006] Preferably, the back of the mobile trolley is provided with multiple sets of pulleys, and steel wire ropes are fitted on the pulleys. The mobile trolley is connected to an external winding mechanism and a buffer cylinder through the steel wire ropes.

[0007] Preferably, the mobile trolley has a housing on both sides, and a bidirectional lead screw is rotatably installed inside the housing. Two sets of support rods are meshed on the bidirectional lead screw. The positioning end is installed at one end of the support rod and located outside the housing. A gear one is fixedly installed outside the bidirectional lead screw. A drive motor is fixedly installed outside the housing. A gear two that meshes with gear one is fixedly installed at the output end of the drive motor.

[0008] Preferably, the housing is provided with multiple sets of guide rods, and the guide rods are movably provided with connectors at their upper limits, with one end of the connectors being fixedly connected to the outside of the support rods.

[0009] Preferably, the side of the positioning end that contacts the outside of the base frame is provided with a rubber pad.

[0010] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model, through an independently designed positioning mechanism, eliminates the reliance on the built-in braking function of the drive system, and realizes active positioning and locking of the mobile trolley. The positioning mechanism drives the positioning end to fit tightly with the base frame through a bidirectional screw, and the friction coefficient is increased with the help of rubber pads, which significantly improves the locking reliability. It effectively solves the problems of unreliable locking and easy failure under extreme working conditions of traditional devices, and meets the rigid fixing requirements of equipment maintenance, emergency failure and other scenarios. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a side view of the present invention. Figure 3 This is a schematic diagram of the shell structure of this utility model.

[0012] In the diagram: 1. Moving trolley; 2. Base frame; 3. Tensioning roller; 4. Pulley; 5. Housing; 6. Two-way lead screw; 7. Support rod; 8. Positioning end; 9. Rubber pad; 10. Gear 1; 11. Drive motor; 12. Gear 2; 13. Guide rod; 14. Connecting piece. Detailed Implementation

[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0014] Please see Figure 1-3An adaptive tensioning device for a belt conveyor includes a traveling trolley 1, which is movably mounted on a base frame 2. A tensioning roller 3 is mounted on the traveling trolley 1, and a positioning mechanism that cooperates with the base frame 2 is mounted on the traveling trolley 1. The positioning mechanism includes a positioning end 8 that contacts the base frame 2 and a bidirectional lead screw 6 for driving the positioning end 8 to move. Multiple sets of pulleys 4 are mounted on the back of the traveling trolley 1, and steel wire ropes are mounted on the pulleys 4. The traveling trolley 1 is connected to an external winding mechanism and a buffer cylinder through the steel wire ropes. The mobile trolley 1 is the core support and moving base of the device. Through the limiting movement on the base frame 2, it can move flexibly along the preset trajectory, providing basic displacement guarantee for belt tension adjustment. The base frame 2 is the installation and support benchmark of the entire device, providing a stable moving track for the mobile trolley 1. At the same time, it cooperates with the positioning end 8 of the positioning mechanism, and the positioning locking force is borne by the contact surface to ensure the structural stability of the mobile trolley 1 when it is in a fixed position. The tensioning roller 3 is in direct contact with the belt. By following the displacement of the mobile trolley 1, it realizes the stretching or loosening of the belt, thereby adjusting the belt tension. The friction between its surface and the belt ensures effective power transmission and avoids belt slippage. It is the direct execution component for tension adjustment. The pulley 4 is installed on the back of the mobile trolley 1 to change the force direction of the wire rope and reduce the transmission resistance, so that the driving force of the external winding mechanism and the buffer cylinder can be smoothly transmitted to the mobile trolley 1, ensuring the smoothness of the trolley movement and the stability of tension adjustment.

[0015] Please see Figure 1 and Figure 3 Both sides of the mobile trolley 1 are provided with housings 5. Inside the housing 5, a bidirectional lead screw 6 is rotatably provided. Two sets of support rods 7 are meshed on the bidirectional lead screw 6. The positioning end 8 is installed on one end of the support rod 7 and located outside the housing 5. A gear 10 is fixedly provided on the outside of the bidirectional lead screw 6. A drive motor 11 is fixedly provided on the outside of the housing 5. A gear 12 that meshes with the gear 10 is fixedly provided at the output end of the drive motor 11. Multiple sets of guide rods 13 are provided inside the housing 5. A connector 14 is movably provided on the upper limit of the guide rod 13. One end of the connector 14 is fixedly connected to the outside of the support rod 7. A rubber pad 9 is provided on the side of the positioning end 8 that contacts the outside of the base frame 2. The housing 5 serves as the protective and mounting carrier for the positioning mechanism, providing a closed installation space for components such as the bidirectional lead screw 6, support rods 7, and guide rods 13. This prevents dust and material corrosion while protecting the internal transmission structure and improving the operational reliability of the positioning mechanism. The bidirectional lead screw 6 rotates to drive two sets of support rods 7 to move synchronously in opposite directions, thereby driving the positioning end 8 to approach or move away from the base frame 2, achieving positioning locking or unlocking actions. It is the core of the power transmission for the displacement of the positioning end 8. The support rods 7 are the transmission connection components connecting the bidirectional lead screw 6 and the positioning end 8. Driven by the bidirectional lead screw 6, they move directionally along the guide rods 13, converting the rotational motion of the lead screw into the linear motion of the positioning end 8. At the same time, they provide structural support for the positioning end 8, ensuring the stability of the force during locking. The positioning end 8 is secured by a tight contact surface with the base frame 2. The position of the mobile trolley 1 is fixed. The rubber pad 9 is attached to the contact surface between the positioning end 8 and the base frame 2. On the one hand, it increases the friction coefficient between the positioning end 8 and the base frame 2, improves the locking reliability, and prevents the mobile trolley 1 from sliding accidentally. On the other hand, it absorbs the impact force during locking, plays a buffering and protective role, and extends the service life of the positioning end 8 and the base frame 2. The drive motor 11 drives the gear 12 to rotate by outputting rotational power, which in turn drives the gear 10 and the double-acting screw 6 to rotate, providing power for the movement of the positioning end 8 and realizing the automated control of positioning locking / unlocking. The guide rod 13 is installed inside the housing 5 to provide directional guidance and constraint for the connecting part 14, restricting the movement trajectory of the support rod 7, preventing the support rod 7 from shifting with the rotation of the double-acting screw 6, ensuring that the positioning end 8 moves smoothly along a straight line, and improving the positioning accuracy.

[0016] Working principle: When it is necessary to fix the position of the mobile trolley 1 (such as for equipment maintenance or tension calibration), the drive motor 11 starts and outputs rotational power, which drives the gear 12 to rotate. The gear 12 meshes with the gear 10 on the outside of the double-acting screw 6, transmitting power to the double-acting screw 6 and driving it to rotate inside the housing 5. When the double-acting screw 6 rotates, the two sets of meshing support rods 7 move directionally along the guide rod 13 (the guide rod 13 restricts the offset of the support rods 7 through the connector 14 to ensure linear movement), which drives the positioning ends 8 at both ends to move towards the base frame 2 synchronously until the positioning ends 8 are tightly attached to the base frame 2. The rubber pad 9 forms stable friction with the contact surface of the base frame 2, and the position of the mobile trolley 1 is fixed by mechanical locking force, completing the locking action. The drive motor 11 rotates in the opposite direction, which drives the double-acting screw 6 to rotate in the opposite direction through the gear 12 and the gear 10. The two sets of support rods 7 move away from the base frame 2 synchronously, the positioning ends 8 separate from the base frame 2, the rubber pad 9 disengages, and the mobile trolley 1 returns to a flexible movement state, completing the unlocking.

[0017] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. An adaptive tensioning device for a belt conveyor, comprising a traveling trolley (1), the traveling trolley (1) being movably mounted on a base frame (2), and a tensioning roller (3) being mounted on the traveling trolley (1), characterized in that: The trolley (1) is provided with a positioning mechanism that cooperates with the base frame (2). The positioning mechanism includes a positioning end (8) that contacts the base frame (2) and a bidirectional lead screw (6) for driving the positioning end (8) to move.

2. The adaptive tensioning device for a belt conveyor according to claim 1, characterized in that: The back of the trolley (1) is provided with multiple sets of pulleys (4), and steel wire ropes are provided on the pulleys (4). The trolley (1) is connected to the external winding mechanism and the buffer cylinder through the steel wire ropes.

3. The adaptive tensioning device for a belt conveyor according to claim 1, characterized in that: The trolley (1) has a housing (5) on both sides. A two-way lead screw (6) is rotatably installed inside the housing (5). Two sets of support rods (7) are meshed on the two-way lead screw (6). The positioning end (8) is installed on one end of the support rod (7) and located outside the housing (5). A gear one (10) is fixedly installed outside the two-way lead screw (6). A drive motor (11) is fixedly installed outside the housing (5). A gear two (12) that meshes with gear one (10) is fixedly installed at the output end of the drive motor (11).

4. The adaptive tensioning device for a belt conveyor according to claim 3, characterized in that: The housing (5) is provided with multiple sets of guide rods (13), and the guide rods (13) are movably provided with connectors (14) at their upper limits. One end of the connectors (14) is fixedly connected to the outside of the support rod (7).

5. The adaptive tensioning device for a belt conveyor according to claim 1, characterized in that: A rubber pad (9) is provided on the side of the positioning end (8) that contacts the outside of the base frame (2).

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