Chain tensioning device of scraper conveyor

Abstract

The invention relates to the technical field of scraper conveyors, in particular to a scraper conveyor chain tightening device which comprises a shell, two driving rollers are rotatably connected to the inner wall of the shell, one end of each driving roller extends out of the shell to be fixedly connected with a driving motor, two chain wheels are fixedly connected to the surface of each driving roller, and the chain wheels are fixedly connected to the surface of the shell. The chain tensioning device has the following beneficial effects that when the tightness degree of a chain needs to be adjusted, a pressing motor, a threaded rod and a threaded hole drive a moving seat to slide along the surface of a guide rod, and at the moment, a transmission plate slides in the same direction along the inner wall of a protection shell and drives a pressing seat to slide in the same direction along the inner wall of the protection shell through a spring; according to the chain tensioning device, the rotating rod drives the transmission plate to rotate, then the rotating rod drives the pressing wheel to move in the same direction, the pressing degree of the pressing wheel on the chain can be adjusted, the tightness degree of the chain can be flexibly controlled, normal operation of the scraper conveyor is guaranteed, and in the process, the spring between the transmission plate and the pressing seat can stretch out and draw back so as to further improve the chain tensioning effect on the chain.

Description

Technical Field

[0001] The invention discloses a chain tightening device for a scraper conveyor, belonging to the field of scraper conveyors. Background Art

[0002] Scraper conveyor is a commonly used material handling equipment, mainly used for continuous conveying of powder, granular and small pieces of materials in horizontal or inclined directions. Its working principle is to drive a device equipped with a scraper through a chain, move in a closed tank, and convey materials from one end to the other. Scraper conveyor has the characteristics of simple structure, stable operation, good sealing, etc., and is widely used in chemical, building materials, grain processing and other industries.

[0003] In the prior art, the scraper chain is an important component in the scraper conveyor, and its tightness is directly related to the operating condition of the scraper conveyor. However, the common scraper conveyor needs to disassemble the chute when in use to adjust the tightness of the scraper chain inside it, which makes the adjustment process more cumbersome. Summary of the invention

[0004] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a chain tightening device for a scraper conveyor to solve the problem raised in the above background technology that the common scraper conveyor needs to disassemble the chute when in use to adjust the tightness of the scraper chain located inside it, resulting in a more cumbersome adjustment process.

[0005] In order to achieve the above-mentioned object, the present invention is implemented through the following technical scheme: a chain tightening device for a scraper conveyor, comprising a shell, the inner wall of the shell is rotatably connected to two driving rollers, one end of the driving roller extends out of the shell and is fixedly connected to a driving motor, two sprockets are fixedly connected to the surface of the driving roller, a chain is sleeved on the surface of the sprocket, a plurality of scrapers are fixedly connected between two adjacent chains, a chain tightening assembly is arranged on one side of the shell, a support assembly is arranged at one end of the chain tightening assembly, a lubrication assembly is arranged in the support assembly, and a yielding opening is opened on the side of the shell close to the chain tightening assembly;

[0006] The chain tightening assembly includes a protective shell fixedly connected to one side of the shell, the top of the protective shell is fixedly connected to a guide rod, the surface of the guide rod is slidably connected to a moving seat, the top of the moving seat is fixedly connected to a clamping motor, the output end of the clamping motor extends out and the moving seat is fixedly connected to a threaded rod, the top of the protective shell is provided with a threaded hole, the threaded rod and the threaded hole are threadedly connected, the bottom end of the threaded rod is fixedly connected to a transmission plate, the bottom end of the transmission plate is fixedly connected to a spring, the bottom end of the spring is fixedly connected to a clamping seat, the side of the clamping seat away from the protective shell is rotatably connected to a rotating rod, the surface of the rotating rod is fixedly connected to two clamping wheels, and the clamping wheels are meshed with the sprocket.

[0007] Furthermore, the support assembly includes a slide groove opened on the inner wall of the shell, a support frame is slidably connected in the slide groove, and the support frame and the rotating rod are rotationally connected.

[0008] Furthermore, the lubrication assembly includes an oil distribution cavity opened in the support frame, an oil delivery pipe is fixedly connected to the middle of the top of the support frame, a bellows is fixedly connected to the surface of the support frame, a containing box is fixedly connected to the bottom end of the bellows, and an oil absorbing sponge is arranged in the containing box.

[0009] Furthermore, a pressure sensor is fixedly connected to the bottom end of the transmission plate, and the pressure sensor is fixedly connected to the spring.

[0010] Furthermore, the vertical section of the support frame is in an inverted L-shape, and the height of the support frame is greater than the height of the sprocket.

[0011] Furthermore, a reinforcing rib is fixedly connected to the surface of the support frame, and the distance between two of the reinforcing ribs is greater than the diameter of the sprocket.

[0012] Furthermore, a cover is movably connected to the bottom end of the containing box, and the cover is fixed to the containing box by bolts.

[0013] Beneficial effects of the present invention: A chain tightening device for a scraper conveyor of the present invention drives the scraper to move to one side inside the shell through a driving motor, a driving roller, a sprocket and a chain, so that the material inside the shell can be conveyed from one end to the other end. In this process, the tightness of the chain will be directly related to the operation condition of the scraper conveyor. When the tightness of the chain needs to be adjusted, the clamping motor, the threaded rod and the threaded hole will drive the moving seat to slide along the surface of the guide rod. The guide rod will provide directional guidance for the movement of the moving seat. At this time, the transmission plate will slide in the same direction along the inner wall of the protective shell, and then the clamping seat will be driven by the spring to slide along the inner wall of the protective shell. The inner wall of the protective shell slides in the same direction, and then the pressing wheel fixed on the surface of the rotating rod is driven to move in the same direction through the rotating rod, so that the pressing degree of the pressing wheel on the chain can be adjusted, so that the tightness of the chain can be flexibly controlled to ensure the normal operation of the scraper conveyor. In this process, the spring between the transmission plate and the pressing seat will expand and contract to further enhance the chain tightening effect. Among them, since the rotating rod and the pressing seat are connected in a rotating manner, the pressing wheel can rotate on the chain surface when the device is running, thereby effectively reducing the wear between the pressing wheel and the chain, which is conducive to extending the service life of the pressing wheel and the chain;

[0014] In order to ensure the chain tightening effect on the chain, a clamping wheel is arranged above each chain. Because all the clamping wheels are fixed to the surface of the rotating rod, the length of the rotating rod is relatively long, and the rotating rod is only supported by the clamping seat, resulting in poor stability of the rotating rod during rotation. In order to solve the above problem, a support assembly is arranged on one side of the rotating rod. As the rotating rod moves, the support frame will be driven to slide in the same direction along the inner wall of the slide groove, thereby providing additional support for the rotating rod during its operation, which is beneficial to improving the stability of the rotating rod when in use, and further ensuring the chain tightening effect of the clamping wheel on the chain;

[0015] As the device is used for a longer time, the pressure wheel and the chain, as well as the sprocket and the chain, will wear out due to frequent friction, thereby reducing the service life of the pressure wheel, sprocket and chain. In order to avoid the above situation, a lubrication component is arranged in the support frame. During the operation of the scraper conveyor, the internal oil pump will sequentially transport the lubricating oil to the oil pipe, and the lubricating oil will sequentially enter the containing box through the oil distribution cavity and the bellows and soak the oil absorption sponge in the containing box. In this process, due to the effect of oil pressure, the bellows will drive the oil absorption sponge to move toward the pressure wheel until the oil absorption sponge contacts the pressure wheel, and the oil absorption sponge can be The pressure wheel is lubricated, and then the sprocket and chain are lubricated through the pressure wheel, thereby effectively reducing the wear between the pressure wheel and the chain and between the sprocket and the chain during operation, which is beneficial to extending the service life of the pressure wheel, sprocket and chain. After the lubricating oil has been delivered for a period of time, the oil pump will extract the lubricating oil and return it to its original path, thereby causing the bellows to contract and drive the oil-absorbing sponge away from the pressure wheel, which not only avoids excessive lubricating oil being delivered to the inside of the storage box and causing a waste of lubricating oil, but also reduces the frequency of friction between the oil-absorbing sponge and the pressure wheel, which is beneficial to extending the service life of the oil-absorbing sponge and the pressure wheel. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0017] Figure 1 It is a schematic diagram of the overall structure of a chain tightening device for a scraper conveyor according to the present invention;

[0018] Figure 2 It is a side cross-sectional structural schematic diagram of a chain tightening device for a scraper conveyor of the present invention;

[0019] Figure 3 This is a schematic diagram of the internal structure of a housing of a chain tightening device for a scraper conveyor according to the present invention;

[0020] Figure 4 It is a schematic structural diagram of a chain tightening assembly of a chain tightening device for a scraper conveyor according to the present invention;

[0021] Figure 5 It is a schematic diagram of the structure of a lubrication component of a chain tightening device for a scraper conveyor according to the present invention;

[0022] Figure 6 The present invention is a schematic diagram of the installation structure of an oil-absorbing sponge of a chain tightening device of a scraper conveyor.

[0023] In the figure: 1. Shell; 2. Driving roller; 3. Driving motor; 4. Sprocket; 5. Chain; 6. Scraper; 7. Chain tightening assembly; 701. Protective shell; 702. Guide rod; 703. Moving seat; 704. Clamping motor; 705. Threaded rod; 706. Threaded hole; 707. Transmission plate; 708. Spring; 709. Clamping seat; 710. Rotating rod; 711. Clamping wheel; 8. Support assembly; 801. Slide; 802. Support frame; 9. Lubrication assembly; 901. Oil distribution chamber; 902. Oil delivery pipe; 903. Bellows; 904. Container; 905. Oil absorbing sponge; 10. Make way port; 11. Pressure sensor; 12. Reinforcement rib; 13. Cover. DETAILED DESCRIPTION

[0024] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0025] See also Figures 1 to 5 The present invention provides a technical solution: a chain tightening device for a scraper conveyor, comprising a shell 1, wherein two driving rollers 2 are rotatably connected to the inner wall of the shell 1, one end of the driving roller 2 extends out of the shell 1 and is fixedly connected to a driving motor 3, two sprocket wheels 4 are fixedly connected to the surface of the driving roller 2, a chain 5 is sleeved on the surface of the sprocket wheel 4, a plurality of scrapers 6 are fixedly connected between two adjacent chains 5, a chain tightening component 7 is arranged on one side of the shell 1, a support component 8 is arranged at one end of the chain tightening component 7, a lubrication component 9 is arranged in the support component 8, and a yielding opening 10 is opened on the side of the shell 1 close to the chain tightening component 7;

[0026] The chain tightening assembly 7 includes a protective shell 701 fixedly connected to one side of the shell 1, a guide rod 702 fixedly connected to the top of the protective shell 701, a moving seat 703 slidably connected to the surface of the guide rod 702, a clamping motor 704 fixedly connected to the top of the moving seat 703, an output end of the clamping motor 704 extends out of the moving seat 703 and is fixedly connected to a threaded rod 705, a threaded hole 706 is provided at the top of the protective shell 701, the threaded rod 705 and the threaded hole 706 are threadedly connected, a transmission plate 707 is fixedly connected to the bottom end of the transmission plate 707, a spring 708 is fixedly connected to the bottom end of the spring 708, a clamping seat 709 is fixedly connected to the side of the clamping seat 709 away from the protective shell 701, and two clamping wheels 711 are fixedly connected to the surface of the clamping rod 710, and the clamping wheels 711 are meshed with the sprocket 4.

[0027] The driving motor 3, the driving roller 2, the sprocket 4 and the chain 5 will drive a number of scrapers 6 fixed between two adjacent chains 5 to move to one side inside the shell 1, so that the material inside the shell 1 can be transported from one end to the other end. In this process, the tightness of the chain 5 will be directly related to the operation condition of the scraper conveyor. When the tightness of the chain 5 needs to be adjusted, the clamping motor 704, the threaded rod 705 and the threaded hole 706 will drive the moving seat 703 to slide along the surface of the guide rod 702. The guide rod 702 will provide directional guidance for the movement of the moving seat 703. At this time, the transmission plate 707 will slide in the same direction along the inner wall of the protective shell 701, and then the clamping seat 709 will be driven by the spring 708 to slide along the protective shell 70 1, and the inner wall of the rotating rod 710 slides in the same direction, and then the pressing wheel 711 fixed on the surface of the rotating rod 710 is driven to move in the same direction through the rotating rod 710, so that the pressing degree of the pressing wheel 711 on the chain 5 can be adjusted, so that the tightness of the chain 5 can be flexibly controlled to ensure the normal operation of the scraper conveyor. In this process, the spring 708 between the transmission plate 707 and the pressing seat 709 will be extended and retracted to further enhance the chain tightening effect on the chain 5. Among them, since the rotating rod 710 and the pressing seat 709 are connected in a rotating manner, the pressing wheel 711 can rotate on the surface of the chain 5 when the device is running, thereby effectively reducing the wear between the pressing wheel 711 and the chain 5, which is conducive to extending the service life of the pressing wheel 711 and the chain 5.

[0028] Preferably, a pressure sensor 11 is fixedly connected to the bottom of the transmission plate 707, and the pressure sensor 11 is fixedly connected to the spring 708. During the operation of the scraper conveyor, the spring 708 fixed between the transmission plate 707 and the clamping seat 709 will continuously apply pressure to the pressure sensor 11 fixed to the bottom of the transmission plate 707, and the pressure sensor 11 will monitor the above pressure in real time. When the pressure value deviates from the preset value, the pressure sensor 11 will transmit a signal to the controller (not shown in the figure) set in the scraper conveyor, and the controller will start the clamping motor 704 to adjust the position of the clamping wheel 711 until the pressure reaches the preset value, so that the tightness of the chain 5 can be automatically controlled.

[0029] See also Figures 1 to 6 As an embodiment of the present invention, the support assembly 8 includes a slide groove 801 provided on the inner wall of the housing 1, and a support frame 802 is slidably connected in the slide groove 801, and the support frame 802 is rotatably connected to the rotating rod 710. In order to ensure the chain tightening effect on the chain 5, a clamping wheel 711 is arranged above each chain 5. Because all the clamping wheels 711 are fixed on the surface of the rotating rod 710, the length of the rotating rod 710 is relatively long, and the rotating rod 710 only relies on the clamping seat 709 for support, resulting in poor stability of the rotating rod 710 during the rotation process. In order to solve the above problem, a support assembly 8 is arranged on one side of the rotating rod 710. As the rotating rod 710 moves, it will drive the support frame 802 to slide in the same direction along the inner wall of the slide groove 801, so that it can provide additional support for the rotating rod 710 during the operation of the rotating rod 710, which is conducive to improving the stability of the rotating rod 710 when in use, and then further ensuring the chain tightening effect of the clamping wheel 711 on the chain 5.

[0030] Furthermore, the vertical section of the support frame 802 is in an inverted L-shape, and the height of the support frame 802 is greater than the height of the sprocket 4. During the operation of the device, the pinch wheel 711 is prone to detach from the chain 5 due to excessively fast rotation speed. At this time, the chain tightening assembly 7 will no longer be able to ensure the tightness of the chain 5. By setting the vertical section of the support frame 802 to an inverted L-shape, the support frame 802 can limit the pinch wheel 711 located below it, avoiding the pinch wheel 711 from detaching from the chain 5 due to excessively fast rotation speed, thereby ensuring the normal operation of the chain tightening assembly 7. The height of the support frame 802 is greater than the height of the sprocket 4, ensuring that the oil-absorbing sponge 905 located in the containing box 904 will not contact the pinch wheel 711 when the bellows 903 is not extended, thereby effectively reducing the wear on the oil-absorbing sponge 905, which is conducive to extending the service life of the oil-absorbing sponge 905.

[0031] Furthermore, a reinforcing rib 12 is fixedly connected to the surface of the support frame 802, and the distance between the two reinforcing ribs 12 is greater than the diameter of the sprocket 4. Considering that a lubrication assembly 9 is provided in the support frame 802, when the lubricating oil enters the oil distribution cavity 901 through the oil delivery pipe 902 fixed to the top of the support frame 802, the weight of the top of the support frame 802 will increase. Since the vertical section of the support frame 802 is an inverted L-shape, the top of the support frame 802 is prone to breakage when the weight of the top of the support frame 802 increases. The reinforcing rib 12 can provide support for the top of the support frame 802. Since the reinforcing rib 12 fixed to the surface of the support frame 802 forms a triangle with the surface of the support frame 802 and the triangle has stability, the supporting effect of the reinforcing rib 12 on the top of the support frame 802 is guaranteed, and the situation that the top of the support frame 802 is prone to breakage due to the weight of the top of the support frame 802 after the lubricating oil enters the oil distribution cavity 901 is avoided, which is conducive to ensuring the service life of the support frame 802.

[0032] See also Figures 1 to 6 As an embodiment of the present invention: the lubrication component 9 includes an oil distribution cavity 901 opened in the support frame 802, an oil delivery pipe 902 is fixedly connected to the middle of the top of the support frame 802, a bellows 903 is fixedly connected to the surface of the support frame 802, and a containing box 904 is fixedly connected to the bottom end of the bellows 903, and an oil absorbing sponge 905 is arranged in the containing box 904. As the device is used for a longer time, frequent friction will cause wear between the clamping wheel 711 and the chain 5, as well as between the sprocket 4 and the chain 5, thereby reducing the service life of the clamping wheel 711, the sprocket 4 and the chain 5. In order to avoid the above situation, a lubrication component 9 is arranged in the support frame 802. During the operation of the scraper conveyor, the internal oil pump (not shown in the figure) will sequentially transport the lubricating oil to the oil delivery pipe 902, and the lubricating oil will sequentially enter the containing box 904 through the oil distribution cavity 901 and the bellows 903 and soak the oil absorbing sponge 905 located in the containing box 904. In this process, due to the effect of oil pressure, the bellows 903 will drive the oil absorbing sponge 905 to move toward the clamping wheel 711 until the oil absorbing sponge 905 and the clamping wheel 711 are aligned. The contact between the clamping wheel 711 and the chain 5 can be lubricated, thereby lubricating the clamping wheel 711, and then lubricating the sprocket 4 and the chain 5, thereby effectively reducing the wear between the clamping wheel 711 and the chain 5 and between the sprocket 4 and the chain 5 during the operation process, which is beneficial to extending the service life of the clamping wheel 711, the sprocket 4 and the chain 5. After the lubricating oil has been delivered for a period of time, the oil pump will extract the lubricating oil and return it to its original path, thereby causing the bellows 903 to contract and drive the oil-absorbing sponge 905 away from the clamping wheel 711, thereby not only avoiding excessive lubricating oil delivered to the inside of the containing box 904 and causing a waste of lubricating oil, but also reducing the frequency of friction between the oil-absorbing sponge 905 and the clamping wheel 711, which is beneficial to extending the service life of the oil-absorbing sponge 905 and the clamping wheel 711.

[0033] Furthermore, the bottom of the container box 904 is movably connected with a cover 13, and the cover 13 is fixed to the container box 904 by bolts. Considering that during the operation of the device, the bellows 903 will drive the oil-absorbing sponge 905 to move toward the clamping wheel 711 located below it due to the effect of oil pressure until the oil-absorbing sponge 905 contacts the clamping wheel 711, and then the sprocket 4 and the chain 5 are lubricated by the clamping wheel 711, but as the use time increases, the oil-absorbing sponge 905 will be worn and become thinner due to frequent friction with the clamping wheel 711, thereby affecting the lubrication effect of the oil-absorbing sponge 905 on the sprocket 4 and the chain 5. At this time, it is necessary to To replace the oil-absorbing sponge 905, open the inspection door (not shown in the figure) provided on one side of the shell 1, then tighten the bolts located in the containing box 904 and the cover 13 to completely detach it from the containing box 904, and then pull the cover 13 away from the containing box 904 to remove the oil-absorbing sponge 905 in the containing box 904, so that the oil-absorbing sponge 905 in the containing box 904 can be replaced, which is beneficial to ensure the lubricating effect of the oil-absorbing sponge 905 on the sprocket 4 and the chain 5.

[0034] Specific implementation method: Start the driving motor 3, the driving motor 3 will drive the driving roller 2 connected to it to rotate, and then drive the chain 5 sleeved on the surface of the sprocket 4 to rotate through the sprocket 4 fixed on the surface of the driving roller 2, and then drive a number of scrapers 6 fixed between two adjacent chains 5 to move to one side inside the shell 1, so that the material inside the shell 1 can be transported from one end to the other end. In this process, the tightness of the chain 5 will be directly related to the operation condition of the scraper conveyor. When it is necessary to adjust the tightness of the chain 5, start the clamping motor 704, the clamping motor 704 will drive the threaded rod 705 connected to it to rotate in the threaded hole 706 opened at the top of the protective shell 701. As the threaded rod 705 rotates, the moving seat 703 fixed at the bottom end of the clamping motor 704 will slide along the surface of the guide rod 702 through the clamping motor 704 connected to it. The guide rod 702 will provide guidance for the movement of the moving seat 703. At this time, the transmission plate 707 fixed at the bottom end of the threaded rod 705 will move along The spring 708 connected to the bottom end of the transmission plate 707 moves in the same direction, and then the pressing seat 709 connected to the bottom end of the spring 708 slides in the same direction along the inner wall of the protective shell 701, and then the rotating rod 710 connected to the pressing seat 709 slides in the same direction along the yielding opening 10, and then the pressing wheel 711 fixed on the surface of the rotating rod 710 moves in the same direction, so that the pressing degree of the pressing wheel 711 on the chain 5 can be adjusted, so that the tightness of the chain 5 can be adjusted. The flexibly controlled operation ensures the normal operation of the scraper conveyor. During this process, the spring 708 between the transmission plate 707 and the clamping seat 709 will be extended and retracted to further enhance the chain tightening effect on the chain 5. In particular, since the rotating rod 710 and the clamping seat 709 are rotatably connected, the clamping wheel 711 can rotate on the surface of the chain 5 when the device is running, thereby effectively reducing the wear between the clamping wheel 711 and the chain 5, which is conducive to extending the service life of the clamping wheel 711 and the chain 5.

[0035] The cam 710 is provided with a plurality of support members 712, 713 and 714 which are provided with a plurality of support members 716. The support members 712 are provided with a plurality of support members 714 and 715 which are provided with a plurality of support members 716. The plurality of support members 712 are provided with a plurality of support members 714 and 715 which are provided with a plurality of support members 716.

[0036] As the use time of the device increases, frequent friction will cause wear between the clamping wheel 711 and the chain 5, as well as between the sprocket 4 and the chain 5, thereby reducing the service life of the clamping wheel 711, the sprocket 4 and the chain 5. In order to avoid the above situation, a lubrication component 9 is arranged in the support frame 802. During the operation of the scraper conveyor, the oil pump inside it will transport the lubricating oil to the oil pipe 902, and the lubricating oil will then enter the oil distribution chamber 901 opened in the support frame 802 through the oil pipe 902. The oil distribution chamber 901 will distribute the lubricating oil entering it so that the lubricating oil enters a plurality of bellows 903 fixed at the bottom end of the support frame 802. The lubricating oil will then enter the containing box 904 connected to the bottom end of the bellows 903 through the bellows 903 and soak the oil absorbing sponge 905 located in the containing box 904. In this process, due to the effect of oil pressure, the bellows 903 will drive the oil absorbing sponge 905 to absorb the oil. The sponge 905 moves toward the clamping wheel 711 located below the support frame 802 until the oil-absorbing sponge 905 contacts the clamping wheel 711, so as to lubricate the clamping wheel 711, and then lubricate the sprocket 4 and the chain 5 through the clamping wheel 711, thereby effectively reducing the wear between the clamping wheel 711 and the chain 5 and between the sprocket 4 and the chain 5 during the operation process, which is beneficial to extending the service life of the clamping wheel 711, the sprocket 4 and the chain 5. After the lubricating oil has been delivered for a period of time, the oil pump will extract the lubricating oil and return it to its original path, thereby causing the bellows 903 to contract, and then causing the oil-absorbing sponge 905 connected to the bellows 903 to move away from the clamping wheel 711, thereby not only avoiding excessive lubricating oil delivered to the inside of the containing box 904 and causing waste of lubricating oil, but also reducing the frequency of friction between the oil-absorbing sponge 905 and the clamping wheel 711, which is beneficial to extending the service life of the oil-absorbing sponge 905 and the clamping wheel 711.

[0037] Although this specification is described according to implementation modes, not every implementation mode includes only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A chain tightening device for a scraper conveyor, comprising a housing (1), wherein the inner wall of the housing (1) is rotatably connected to two driving rollers (2), one end of the driving roller (2) extending out of the housing (1) is fixedly connected to a driving motor (3), two sprocket wheels (4) are fixedly connected to the surface of the driving roller (2), a chain (5) is sleeved on the surface of the sprocket wheel (4), and a plurality of scrapers (6) are fixedly connected between two adjacent chains (5), characterized in that: A chain tightening assembly (7) is disposed on one side of the housing (1); a support assembly (8) is disposed at one end of the chain tightening assembly (7); a lubrication assembly (9) is disposed inside the support assembly (8); and a clearance opening (10) is provided on one side of the housing (1) close to the chain tightening assembly (7); The chain tightening assembly (7) comprises a protective shell (701) fixedly connected to one side of the housing (1); a guide rod (702) is fixedly connected to the top of the protective shell (701); a movable seat (703) is slidably connected to the surface of the guide rod (702); a clamping motor (704) is fixedly connected to the top of the movable seat (703); an output end of the clamping motor (704) extends out of the movable seat (703) and is fixedly connected to a threaded rod (705); a threaded hole (706) is provided at the top of the protective shell (701); and the threaded rod (705) is fixedly connected to the top of the movable seat (703). There is a threaded connection between the threaded rod (705) and the threaded hole (706), the bottom end of the threaded rod (705) is fixedly connected to a transmission plate (707), the bottom end of the transmission plate (707) is fixedly connected to a spring (708), the bottom end of the spring (708) is fixedly connected to a clamping seat (709), the clamping seat (709) is rotatably connected to a rotating rod (710) on the side away from the protective shell (701), and two clamping wheels (711) are fixedly connected to the surface of the rotating rod (710), and the clamping wheels (711) are meshed with the sprocket (4).

2. A chain tightening device for a scraper conveyor according to claim 1, characterized in that: The support assembly (8) comprises a slide groove (801) provided on the inner wall of the housing (1), a support frame (802) being slidably connected in the slide groove (801), and the support frame (802) is rotatably connected to the rotating rod (710).

3. The chain tightening device for a scraper conveyor according to claim 1, characterized in that: The lubrication assembly (9) comprises an oil distribution cavity (901) opened in the support frame (802), an oil delivery pipe (902) is fixedly connected to the middle of the top end of the support frame (802), a bellows (903) is fixedly connected to the surface of the support frame (802), a containing box (904) is fixedly connected to the bottom end of the bellows (903), and an oil absorbing sponge (905) is arranged in the containing box (904).

4. The chain tightening device for a scraper conveyor according to claim 1, characterized in that: A pressure sensor (11) is fixedly connected to the bottom end of the transmission plate (707), and the pressure sensor (11) and the spring (708) are fixedly connected.

5. The chain tightening device for a scraper conveyor according to claim 2, characterized in that: The vertical cross-section of the support frame (802) is in an inverted L-shape, and the height of the support frame (802) is greater than the height of the sprocket (4).

6. A chain tightening device for a scraper conveyor according to claim 2, characterized in that: A reinforcing rib (12) is fixedly connected to the surface of the support frame (802), and the distance between two reinforcing ribs (12) is greater than the diameter of the sprocket (4).

7. The chain tightening device for a scraper conveyor according to claim 3, characterized in that: The bottom end of the containing box (904) is movably connected to a cover (13), and the cover (13) and the containing box (904) are fixed by bolts.

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