Tail-end linkage tensioning device of scraper conveyor

Abstract

This application discloses a tail-end linkage tensioning device for a scraper conveyor, mainly solving the problem that human factors can cause asynchronous adjustment of the sprocket assembly's position during tail adjustment of existing scraper conveyors, thus affecting the normal operation of the conveyor. It includes slide grooves on both sides of the tail frame, a slider for moving along the slide grooves and fixedly connected to the sprocket assembly, an adjusting screw fixed to the side of the slider along the sliding direction of the slider and correspondingly passing through the tail side of the tail frame, and two synchronous adjustment mechanisms fixed to both sides of the tail of the tail frame and correspondingly connected to the adjusting screws for driving the slider to move along the slide grooves; the two synchronous adjustment mechanisms are synchronously connected via a linkage. This device can achieve synchronous adjustment of the scraper conveyor tail, saving manpower and offering high reliability.

Description

Technical Field

[0001] This application relates to the field of scraper conveyor technology, and specifically to a tail rod tensioning device for a scraper conveyor. Background Technology

[0002] A scraper conveyor is a mechanical device that uses a scraper chain to circulate within a trough to continuously transport bulk materials. As a core transportation device in the coal mining process, it is used to continuously transport coal cut by the coal mining machine from the working face to equipment such as a roadway transfer machine or a belt conveyor.

[0003] Scraper conveyors generally consist of three core modules: the head section, the middle trough, and the tail section, forming a circular transport system. The tail section is the "tension adjustment center" of the scraper conveyor, directly affecting chain life and operational stability. By adjusting the tail section, compensation can be made for thermal expansion and contraction and wear elongation of the chain to maintain reasonable tension, while preventing coal pile-up and chain jamming accidents caused by chain slack.

[0004] Specifically, the tail section of an existing scraper conveyor includes a tail frame, at which a sprocket assembly that meshes with the chain to transmit power is located. When adjusting the tail section, the machine is first stopped and the power is cut off. Then, the position of the sprocket assembly is adjusted along the chain's running direction, causing the chain to tighten or loosen accordingly, thus adjusting its tension. However, in implementing the technical solution in this application, the inventors discovered that adjusting the existing tail section requires two people to adjust the position of the sprocket assembly simultaneously from both sides at the same speed to avoid the sprocket assembly deflecting due to inconsistent adjustment speeds on both sides, which would affect the normal operation of the chain. However, due to human error, the degree of adjustment on both sides of the sprocket assembly differs and cannot be kept consistent, resulting in varying degrees of deflection of the sprocket assembly, which in turn affects the normal operation of the scraper conveyor and causes wear on the chain during operation.

[0005] The information disclosed in this background section is intended only to enhance the understanding of the background technology of this disclosure and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0006] In view of at least one of the above technical problems, this disclosure provides a tail linkage tensioning device for a scraper conveyor, which mainly solves the problem that the position adjustment of the two sides of the sprocket assembly is not synchronized due to human factors when the tail of the existing scraper conveyor is adjusted, thus affecting the normal operation of the scraper conveyor.

[0007] According to one aspect of this disclosure, a tail link tensioning device for a scraper conveyor is provided, comprising a slide groove disposed on both sides of the tail frame, a slider for corresponding movement along the slide groove and fixedly connected to a sprocket assembly, an adjusting screw fixed to the side of the slider along the sliding direction of the slider and correspondingly passing through the tail side of the tail frame, and two synchronous adjustment mechanisms fixed to both sides of the tail of the tail frame and correspondingly connected to the adjusting screw for driving the slider to move along the slide groove; the two synchronous adjustment mechanisms are synchronously connected by a connecting rod.

[0008] In some embodiments of this disclosure, the synchronization adjustment mechanism includes a housing for being fixedly connected to the tailstock and correspondingly passing through the adjusting screw, an internally threaded tube sleeved on the adjusting screw and threadedly connected to the adjusting screw, a worm gear fixed to the internally threaded tube, and a worm perpendicular to the worm gear and correspondingly meshing with the worm gear; both ends of the internally threaded tube are fixedly connected to the housing via bearings; the worms of the two synchronization adjustment mechanisms are correspondingly synchronously connected via connecting rods.

[0009] In some embodiments of this disclosure, the worm gears of the two synchronous adjustment mechanisms are connected by a coupling sleeve for transmission; the ends of the worm gear and the connecting rod are respectively provided with positioning protrusions, and the inner edge of the coupling sleeve is provided with positioning grooves that match the positioning protrusions.

[0010] In some embodiments of this disclosure, the two ends of the connecting rod are respectively provided with external thread portions of a certain length, and the external thread portions are respectively threaded with limiting nuts for limiting the position of the coupling sleeve.

[0011] In some embodiments of this disclosure, a handwheel is connected to the worm gear of any of the synchronization adjustment mechanisms.

[0012] In some embodiments of this disclosure, the worm gear of any of the synchronous adjustment mechanisms is connected to a drive motor, and the tail link tensioning device of the scraper conveyor further includes a controller for driving the rotation direction and starting / stopping of the drive motor.

[0013] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0014] 1. The two synchronous adjustment mechanisms achieve synchronous adjustment through a linkage, which can reduce the input of manpower while ensuring the synchronicity of adjustment actions and avoid the problem of asynchronous adjustment caused by human operation errors, which may lead to the deflection of the sprocket assembly and affect normal transportation.

[0015] 2. The synchronous adjustment structure uses a worm gear mechanism, allowing adjustment of the slider position only through the worm. Since the worm gear cannot drive the worm, the slider position is not affected by external forces such as chain tension, thus ensuring the reliability of the tail section.

[0016] 3. The connecting rod is quickly detached from the two worm gears via a coupling sleeve, which facilitates the removal of the connecting rod during scraper conveyor operation and avoids affecting the normal operation of the scraper conveyor. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the tail section of a scraper conveyor in one embodiment of this application.

[0018] Figure 2 for Figure 1 Enlarged schematic diagram of part A in the middle.

[0019] Figure 3 This is a schematic diagram of the coupling sleeve in one embodiment of this application.

[0020] In the above figures, 1 is the tail frame, 2 is the slide groove, 21 is the slide rail, 3 is the slider, 4 is the sprocket assembly, 5 is the adjusting screw, 6 is the synchronous adjustment mechanism, 61 is the housing, 62 is the worm gear, 7 is the connecting rod, 71 is the external thread, 8 is the coupling sleeve, 81 is the positioning groove, 9 is the limit nut, and 10 is the handwheel. Detailed Implementation

[0021] In the description of this application, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," "vertical," "horizontal," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "connection" and "linkage" in this application, unless otherwise specified, include both direct and indirect connections (linkages).

[0022] Unless otherwise specified, all devices and other components involved in the following embodiments are commercially available products.

[0023] To better understand the technical solution of this application, the above technical solution will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] To achieve synchronous position adjustment of the tail sprocket assembly of a scraper conveyor and avoid chain wear and safety accidents caused by uneven chain force due to misalignment of the sprocket assembly, this example discloses a tail linkage tensioning device for a scraper conveyor. (See attached image.) Figure 1 In this example, the tailstock 1 of the scraper conveyor is provided with grooves 2 on both sides, and the axial direction of the grooves 2 is set along the movement direction of the scraper conveyor chain. Additionally, sliders 3 are slidably embedded in the grooves 2. The sliders 3 on both sides of the tailstock are symmetrically arranged, and a sprocket assembly 4 is fixed between the two sliders 3. That is, the two ends of the sprocket assembly 4 are respectively fixed relative to the two sliders 3. Thus, by adjusting the position of the sliders 3, the sliders 3 move along the grooves, thereby adjusting the position of the sprocket assembly 4, and thus achieving the tensioning or slack of the chain. To ensure the smooth and reliable movement of the sliders 3 along the grooves 2, see [reference needed]. Figure 1 The upper and lower sides of the slide groove 2 are respectively provided with slide rails 21, and the upper and lower end faces of the slider 3 are respectively provided with rail grooves that match the slide rails 21. Thus, the movement direction of the slider 3 is limited by the mutual interlocking between the rail grooves and the slide rails, thereby achieving the technical effect of the slider 3 moving smoothly along the slide rails in the slide groove 2.

[0025] However, in the process of adjusting the position of the sprocket assembly using slider 3, at least two operators are required, standing on either side of the tailstock, to synchronously adjust the positions of the two sliders 3 at the same speed and direction. This is to avoid the problem of one side of the sprocket assembly moving too fast and the other side moving too slow due to asynchronous operation, causing the sprocket assembly to deflect to a certain degree and thus unable to remain perpendicular to the chain's running direction. However, in actual operation, on the one hand, due to human factors, the two operators, as independent individuals, find it difficult to maintain accurate and reliable synchronous adjustment, which can lead to chain wear and affect the normal operation of the scraper conveyor after the sprocket assembly deflects; on the other hand, since the simultaneous adjustment of both sides of the sprocket assembly is required, it cannot be completed by a single person, thus consuming manpower. Therefore, to solve the above problems, in this embodiment, see... Figure 1 Adjusting screws 5 are respectively hinged to the side end faces of the two sliders 3 via hinge seats. The adjusting screws 5 are arranged along the moving direction of the sliders 3 and are respectively inserted into the tail frame 1, so that one end of the adjusting screw 5 extends out of the tail frame 1 by a certain length. Thus, by adjusting the length of the adjusting screw 5 extending out of the tail frame 1, the position of the corresponding slider 3 can be moved, thereby realizing the position adjustment of the sprocket assembly.

[0026] In addition, to achieve synchronous adjustment of the two adjusting screws 5, in this embodiment, synchronous adjustment mechanisms 6 are fixedly installed on both sides of the tailstock and are connected to the corresponding adjusting screws 5. These synchronous adjustment mechanisms 6 drive the movement of the two sliders along the slide groove. A connecting rod 7 is provided between the two synchronous adjustment mechanisms 6, thereby achieving the synchronous transmission and drive function of the two synchronous adjustment mechanisms. For details, see [link to documentation]. Figure 2 In this embodiment, the synchronous adjustment mechanism 6 includes a housing 61 fixed to the tail end face of the tail frame. An internally threaded tube is fixedly provided inside the housing 61 by bearings. The outer ring of the bearing is fixedly connected to the housing, and the inner ring of the bearing is fixedly connected to the internally threaded tube, thereby allowing the internally threaded tube to rotate relative to the housing. Furthermore, in this example, the internal thread of the internally threaded tube matches the external thread of the adjusting screw 5, and the two are threadedly connected. Since the internally threaded tube is fixed to the housing by bearings, when the internally threaded tube rotates, it drives the adjusting screw 5 to move relative to the internally threaded tube along the axial direction of the adjusting screw 5. This adjusts the length of the adjusting screw 5 extending out of the tail frame, thereby causing the slider to move along the slide groove, thus realizing the adjustment of the slider position. Furthermore, to achieve the driving of the internally threaded tube while preventing the slider from being passively moved axially by external forces such as chain tension, in this embodiment, a worm gear is fixedly installed outside the internally threaded tube, and a worm 62 meshing with the worm gear is installed in a direction perpendicular to the internally threaded tube. Driving the worm 62 drives the worm gear to rotate, thereby causing the internally threaded tube fixedly connected to the worm gear to rotate, adjusting the length of the adjusting screw 5 extending from the tailstock, thus achieving the purpose of moving the slider position. The cooperation between the worm gear and the worm ensures that only the worm drives the internally threaded tube integrated with the worm gear to rotate, effectively preventing the adjusting screw from changing position due to external forces such as chains. When external forces are present, the worm can limit the worm gear, preventing the adjusting screw from moving.

[0027] To achieve synchronous adjustment of the two synchronous adjustment mechanisms, in this embodiment, see... Figure 1 A connecting rod 7 is provided for the transmission connection between the two worm gears of the two synchronous adjustment mechanisms. Considering that the connecting rod spanning the tail of the scraper conveyor during material transport could cause positional interference and other adverse effects on the further material falling, in this embodiment, the connecting rod 7 is detachably connected to the connecting rods of the two synchronous adjustment mechanisms. Specifically, in this embodiment, the connecting rod 7 is connected to the worm gear of the synchronous adjustment mechanism via a coupling sleeve 8. The outer edges of both ends of the worm gear and the connecting rod 7 are respectively provided with positioning protrusions of the same width and height. (See Figure 8). Figure 3The inner edge of the coupling sleeve 8 is provided with a positioning groove 81 that matches the positioning protrusions at the ends of the worm and the connecting rod. In this example, the diameters of the connecting rod 7 and the worm are the same, and the inner edge diameter of the coupling sleeve 8 matches the diameter of the connecting rod. Thus, when the end of the connecting rod 7 contacts the end of the worm, the coupling sleeve 8 is pushed along the connecting rod, so that the positioning protrusions at the ends of the connecting rod and the worm respectively engage in the positioning grooves of the coupling sleeve 8, thereby realizing the transmission connection between the two worms.

[0028] Furthermore, considering that the coupling sleeve 8 is movably connected at the engagement position of the connecting rod 7 and the worm gear, there is a risk of disengagement and transmission failure during the transmission process. Therefore, in this embodiment, see... Figure 2 External threaded portions 71 of a certain length are respectively opened on both ends of the connecting rod 7, and limiting nuts 9 are threadedly connected to these external threaded portions 71. At the same time, the positioning groove 81 on the inner edge surface of the coupling sleeve 8 is only opened from one end of the coupling sleeve, and the other end is not through, that is, the length of the positioning groove 81 is less than the length of the coupling sleeve. This allows the unthrough end of the positioning groove of the coupling sleeve to abut against the positioning protrusion on the connecting rod, limiting the position of the coupling sleeve when connecting the connecting rod and the worm gear. Furthermore, see Figure 2 By tightening the limiting nut 9, the limiting nut 9 abuts against the end of the positioning groove of the coupling sleeve that is not fully penetrated, thereby limiting the working position of the coupling sleeve and preventing the coupling sleeve from moving during the connecting rod transmission process, which would cause the transmission to fail.

[0029] To facilitate the driving rotation of the worm gear, in this embodiment, see... Figure 1 and 2 A handwheel 10 is connected to the outer end of the worm gear for easy adjustment of the slider position by personnel. In other embodiments, to improve the driving efficiency of the worm gear, a drive motor is connected to the worm gear drive in this example. The tensioning device is also equipped with a controller for controlling the rotation direction and start / stop of the drive motor. By operating the buttons on the controller, the direction and start / stop of the drive motor can be controlled, achieving the purpose of rapid adjustment of the slider position.

[0030] When adjustment is required at the tail of the scraper conveyor, the connecting rod is coaxially positioned between the worm gears of the two synchronous adjustment mechanisms. The positioning protrusions at the end of the connecting rod are aligned with those on the worm gear. Then, the coupling sleeve fitted over the connecting rod is pushed, causing its positioning groove to engage with the positioning protrusions on both the connecting rod and the worm gear. Finally, the limiting nut is tightened to secure the coupling sleeve, thus limiting its position. After the connecting rod is set up, the worm gear on one side is rotated manually or by a drive motor, allowing for on-demand adjustment of the slider position. After adjustment, the connecting rod can be removed to prevent interference with material transport. Simultaneous adjustment of both sides of the sprocket assembly can be achieved by a single person, saving manpower and ensuring synchronization.

[0031] Although some preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0032] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of its inventive concept. Therefore, if such modifications and variations to this disclosure fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A tail linkage tensioning device for a scraper conveyor, characterized in that, It includes slide grooves on both sides of the tail frame, a slider for moving along the slide groove and fixedly connected to the sprocket assembly, an adjusting screw fixed to the side of the slider along the sliding direction of the slider and correspondingly passing through the tail side of the tail frame, and two synchronous adjustment mechanisms fixed to both sides of the tail of the tail frame and correspondingly connected to the adjusting screw for driving the slider to move along the slide groove; the two synchronous adjustment mechanisms are synchronously connected by connecting rods.

2. The tail connecting rod tensioning device for a scraper conveyor according to claim 1, characterized in that, The synchronous adjustment mechanism includes a housing that is fixedly connected to the tailstock and passes through the adjusting screw, an internally threaded tube that is sleeved on the adjusting screw and threadedly connected to the adjusting screw, a worm gear fixed to the internally threaded tube, and a worm that is perpendicular to the worm gear and meshes with the worm gear for transmission. The two ends of the internally threaded tube are fixedly connected to the housing via bearings. The worms of the two synchronous adjustment mechanisms are synchronously connected via connecting rods.

3. The tail linkage tensioning device for a scraper conveyor according to claim 2, characterized in that, The worm gears of the two synchronous adjustment mechanisms are connected by a coupling sleeve for transmission; the ends of the worm gear and the connecting rod are respectively provided with positioning protrusions, and the inner edge of the coupling sleeve is provided with positioning grooves that match the positioning protrusions.

4. The tail connecting rod tensioning device for a scraper conveyor according to claim 3, characterized in that, Both ends of the connecting rod are provided with external threaded portions of a certain length, and the external threaded portions are respectively threaded with limiting nuts for limiting the position of the coupling sleeve.

5. The tail connecting rod tensioning device for a scraper conveyor according to claim 1, characterized in that, Each of the aforementioned synchronous adjustment mechanisms has a handwheel connected to the worm gear in a corresponding transmission.

6. The tail linkage tensioning device for a scraper conveyor according to claim 1, characterized in that, The worm gear of any of the aforementioned synchronous adjustment mechanisms is connected to a drive motor, and the tail link tensioning device of the scraper conveyor further includes a controller for driving the rotation direction and starting / stopping of the drive motor.

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