Friction distance limiter of scraper conveyor

Abstract

The utility model provides a friction distance limiter of a scraper conveyor, which relates to the technical field of scraper conveyors, and comprises a shell, a fixed disc, an inner cylinder, a transmission shaft and a friction plate, one side of the shell is fixedly connected with the fixed disc, the inner cylinder is arranged in the shell, the transmission shaft is arranged in the inner cylinder, and the friction plate is arranged in the transmission shaft. A plurality of sets of friction plates are arranged in the inner cylinder, a limiting mechanism is arranged at one end of the fixing disc, and the limiting mechanism comprises a first connecting block, a second connecting block, a clamping groove and a clamping block; after the transmission shaft is inserted into the inner cylinder, one end of the transmission shaft is sleeved with the second connecting block, the end, provided with the clamping block, of the second connecting block faces the end, provided with the clamping groove, of the first connecting block, and the clamping block is clamped into the clamping groove so that the first connecting block and the second connecting block can be combined into a whole. The inner wall of the second connecting block is attached to the outer wall of the transmission shaft to limit the position of the transmission shaft and prevent the transmission shaft from deviating in the operation process.

Description

Technical Field

[0001] The utility model relates to the technical field of scraper conveyors, in particular to a friction distance limiter of a scraper conveyor. Background Art

[0002] Scraper conveyor is an important material handling machine, mainly used for scraping and transporting bulk materials in open troughs. It uses scrapers fixed to the traction chain to push the materials forward. It has the characteristics of simple structure, strong and durable, and convenient loading and unloading.

[0003] The friction limiter mainly works on the principle of friction, limiting the movement of the mechanical system through the friction force between two friction plates. It has the advantages of simple structure and low manufacturing cost. It is widely used in various mechanical equipment, such as scraper conveyors and coal crushers. By adjusting the material and pressure of the friction plates, the magnitude of the friction force can be easily controlled, thereby achieving precise limitation of the movement of the mechanical system.

[0004] For example, Chinese patent publication number CN202222881054.6 discloses a friction torque limiter with a protective function. It proposes "a housing and a drive shaft, wherein the inner surface of one side of the housing is provided with a transmission groove, a bearing is mounted on the inner surface of the housing on one side of the transmission groove through a bearing hole, the drive shaft is sleeved on the inner surface of the bearing, a friction plate A is mounted on the inner surface of the transmission groove through transmission teeth A, and a friction plate B is mounted on the outer surface of the drive shaft through transmission teeth B. A movable seat is sleeved on one side of the inner surface of the transmission groove, and the outer surface of the movable seat is connected to the housing via an adjusting bolt. This solves the problem that a single set of springs cannot squeeze and lock the friction plate, affecting torque transmission, and ensures friction of the friction plate."

[0005] In the existing friction torque limiter, friction plates A and B are fixed in the transmission shaft and transmission groove respectively through transmission teeth. When pressure is applied in a direction perpendicular to the friction plates, the friction between the friction plates A and B is increased. At the same time, the friction plates A and B will generate axial forces on the transmission groove and transmission shaft respectively. As the applied pressure increases, the axial force increases, which can easily cause the transmission shaft to shift in position. Therefore, the utility model proposes a friction torque limiter for a scraper conveyor to solve the above problem. Utility Model Content

[0006] In response to the above problems, the utility model proposes a friction limiter for a scraper conveyor to solve the problem in the prior art that friction plates A and B respectively generate axial forces on the transmission groove and the transmission shaft. As the applied pressure increases, the axial force increases, which easily causes the transmission shaft to shift in position.

[0007] To achieve the purpose of the utility model, the utility model is implemented through the following technical solutions: a friction limiter for a scraper conveyor, comprising an outer shell, a fixed disk, an inner cylinder, a transmission shaft and a friction plate, wherein a fixed disk is fixedly connected to one side of the outer shell, an inner cylinder is provided inside the outer shell, a transmission shaft is provided inside the inner cylinder, multiple groups of friction plates are provided inside the inner cylinder, and a limiting mechanism is provided at one end of the fixed disk.

[0008] A further improvement is that: the limiting mechanism includes a No. 1 connecting block, a No. 2 connecting block, a slot and a block, one end of the fixed disk is fixedly connected to the No. 1 connecting block, one end of the No. 1 connecting block is provided with a No. 2 connecting block, the interior of the No. 1 connecting block is provided with a slot, one end of the No. 2 connecting block is provided with a block, and the outer wall of the block is engaged with the inner wall of the slot.

[0009] A further improvement is that the shapes of the card slot and the card block are both set to a cross structure, and one end of the transmission shaft passes through the interior of the No. 1 connecting block and the No. 2 connecting block.

[0010] A further improvement is that: the end of the No. 2 connecting block away from the clamping block is fixedly connected to a clamping barrel, the outer sides of the No. 1 connecting block and the No. 2 connecting block are both provided with threaded surfaces, the outer sides of the No. 1 connecting block and the No. 2 connecting block are threadedly connected to a fixing sleeve, and the interior of the fixing sleeve is provided with a conical groove matching the clamping barrel.

[0011] Further improvements are: a plurality of No. 1 connection holes are provided inside the fixed plate, and the distances between adjacent No. 1 connection holes are equal, fixing bolts are inserted into the No. 1 connection holes, and the fixed plate is detachably connected to the scraper conveyor through the fixing bolts.

[0012] A further improvement is that: a plurality of No. 3 connecting holes are provided at one end of the outer shell away from the fixed plate, a plurality of No. 2 connecting holes are provided at one end of the inner tube, a connecting bolt is inserted into the interior of the No. 2 connecting hole, and one end of the connecting bolt is threadedly connected to the inner wall of the No. 3 connecting hole.

[0013] A further improvement is that a plurality of anti-collision strips are provided on the outer side of the shell, and the plurality of anti-collision strips are distributed in an equidistant annular state, and the shape of the anti-collision strips is set to be a rectangular structure.

[0014] The beneficial effect of the present invention is that after the transmission shaft is inserted into the interior of the inner cylinder, the No. 2 connecting block is sleeved on one end of the transmission shaft, and the end of the No. 2 connecting block with the clamping block faces the end of the No. 1 connecting block with the clamping groove, and the clamping block is clamped into the interior of the clamping groove to combine the No. 1 connecting block and the No. 2 connecting block into one, and the inner wall of the No. 2 connecting block fits with the outer wall of the transmission shaft to limit the position of the transmission shaft and avoid deviation during the operation of the transmission shaft. After the No. 1 connecting block and the No. 2 connecting block are combined, one end of the transmission shaft will also pass through the interior of the clamping barrel, and a fixing sleeve is sleeved on one end of the transmission shaft, and the fixing sleeve is screwed to combine with the No. 1 connecting block and the No. 2 connecting block, and the tapered groove inside the fixing sleeve is used to squeeze the clamping barrel, driving the clamping barrel to shrink inward, so that the inner wall of the clamping barrel fits with the outer wall of the transmission shaft, thereby improving the limiting effect of the No. 1 connecting block and the No. 2 connecting block on the transmission shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is the main view of the utility model;

[0016] Figure 2 It is a side view of the utility model;

[0017] Figure 3 This is a schematic diagram of the assembly of the utility model;

[0018] Figure 4 This is a schematic diagram of the internal structure of the inner cylinder of the present utility model.

[0019] In the figure: 1. Outer shell; 2. Fixed plate; 3. Inner cylinder; 4. Transmission shaft; 5. Friction plate; 6. Connecting block No. 1; 7. Connecting block No. 2; 8. Clamping cylinder; 9. Fixed sleeve; 10. Connecting bolt; 11. Anti-collision strip; 12. Connecting hole No. 1; 13. Connecting hole No. 2; 14. Connecting hole No. 3; 15. Card slot; 16. Card block. DETAILED DESCRIPTION

[0020] In order to deepen the understanding of the present invention, the present invention will be further described in detail below in conjunction with embodiments. The embodiments are only used to explain the present invention and do not constitute a limitation on the scope of protection of the present invention.

[0021] according to Figure 1 、 2As shown in Figures 3 and 4, this embodiment proposes a friction limiter for a scraper conveyor, including an outer shell 1, a fixed disc 2, an inner cylinder 3, a transmission shaft 4 and a friction plate 5. One side of the outer shell 1 is fixedly connected to the fixed disc 2, the inner shell 1 is provided with an inner cylinder 3, the inner cylinder 3 is provided with a transmission shaft 4, the inner cylinder 3 is provided with multiple groups of friction plates 5, and one end of the fixed disc 2 is provided with a limiting mechanism. Under normal working conditions, the friction plate 5 is in close contact with the transmission shaft 4 and rotates together. At this time, the friction force between them is static friction. Through this static friction, the friction limiter It can transmit the required torque to ensure the normal operation of the scraper conveyor. When the transmission system is overloaded or the load suddenly increases, the transmitted torque will increase. If the transmitted torque exceeds the slip torque set by the friction limiter, relative sliding will occur between the friction plate 5 and the drive shaft 4. At this time, the friction between them becomes dynamic friction. Although there is still torque transmission between the master and driven components, the friction torque is limited to a certain value range, thereby avoiding overload and damage to the mechanical equipment. The limit mechanism can lock the position of the drive shaft 4 to avoid the problem of offset during the operation of the drive shaft 4.

[0022] The limiting mechanism includes a No. 1 connecting block 6, a No. 2 connecting block 7, a slot 15 and a block 16. One end of the fixed disk 2 is fixedly connected to the No. 1 connecting block 6, one end of the No. 1 connecting block 6 is provided with a No. 2 connecting block 7, the interior of the No. 1 connecting block 6 is provided with a slot 15, and one end of the No. 2 connecting block 7 is provided with a block 16. The outer wall of the block 16 is engaged with the inner wall of the slot 15. The shape of the slot 15 and the block 16 are both set to a cross structure. One end of the transmission shaft 4 passes through a After the transmission shaft 4 is inserted into the inner tube 3, the No. 2 connection block 7 is sleeved on one end of the transmission shaft 4, and the end of the No. 2 connection block 7 with the clamping block 16 faces the end of the No. 1 connection block 6 with the clamping groove 15, and the clamping block 16 is snapped into the inside of the clamping groove 15 to combine the No. 1 connection block 6 and the No. 2 connection block 7 into one. The inner wall of the No. 2 connection block 7 fits with the outer wall of the transmission shaft 4 to limit the position of the transmission shaft 4 and avoid displacement of the transmission shaft 4 during operation.

[0023] The end of the No. 2 connecting block 7 away from the clamping block 16 is fixedly connected with a clamp 8, and the outer sides of the No. 1 connecting block 6 and the No. 2 connecting block 7 are both provided with threaded surfaces. The outer sides of the No. 1 connecting block 6 and the No. 2 connecting block 7 are threadedly connected with a fixing sleeve 9, and the interior of the fixing sleeve 9 is provided with a conical groove matching the clamp 8. After the No. 1 connecting block 6 and the No. 2 connecting block 7 are combined, one end of the transmission shaft 4 will also pass through the interior of the clamp 8. The fixing sleeve 9 is sleeved on one end of the transmission shaft 4, and the fixing sleeve 9 is screwed to combine with the No. 1 connecting block 6 and the No. 2 connecting block 7. The clamp 8 is squeezed by the conical groove inside the fixing sleeve 9, driving the clamp 8 to shrink inward, so that the inner wall of the clamp 8 fits with the outer wall of the transmission shaft 4, thereby improving the limiting effect of the No. 1 connecting block 6 and the No. 2 connecting block 7 on the transmission shaft 4.

[0024] The interior of the fixed plate 2 is provided with a plurality of No. 1 connecting holes 12, and the distances between adjacent No. 1 connecting holes 12 are equal. The interior of the No. 1 connecting holes 12 is inserted with fixing bolts. The fixed plate 2 is detachably connected to the scraper conveyor through the fixing bolts. The No. 1 connecting hole 12 on the fixed plate 2 is aligned with the No. 1 connecting hole 12 on the scraper conveyor, and the fixing bolts are screwed into the interior of the two No. 1 connecting holes 12 to fix the No. 1 connecting hole 12 and the scraper conveyor as a whole, so as to install the friction limiter on the scraper conveyor.

[0025] The outer shell 1 is provided with a plurality of No. 3 connecting holes 14 at one end away from the fixed disk 2, and the inner tube 3 is provided with a plurality of No. 2 connecting holes 13 at one end. A connecting bolt 10 is inserted into the No. 2 connecting hole 13, and one end of the connecting bolt 10 is threadedly connected to the inner wall of the No. 3 connecting hole 14. After the inner tube 3 is inserted into the interior of the outer shell 1, the position of the inner tube 3 is adjusted so that the positions of the inner tube 3 and the No. 2 connecting holes 13 and No. 3 connecting holes 14 on the outer shell 1 are aligned with each other, and the connecting bolt 10 is screwed into the No. 2 connecting hole 13 and the No. 3 connecting hole 14 to fix the inner tube 3 and the outer shell 1 as a whole and to install the inner tube 3 inside the outer shell 1.

[0026] The outer side of the shell 1 is provided with a plurality of anti-collision strips 11, and the plurality of anti-collision strips 11 are distributed in an equidistant ring state. The shape of the anti-collision strips 11 is set to a rectangular structure. The anti-collision strips 11 can separate external objects from the shell 1, so that external objects cannot directly contact the outside of the shell 1, thereby protecting the shell 1.

[0027] The friction limiter is configured such that after the transmission shaft 4 is inserted into the interior of the inner tube 3, the No. 2 connecting block 7 is sleeved onto one end of the transmission shaft 4, and the end of the No. 2 connecting block 7 with the clamping block 16 faces the end of the No. 1 connecting block 6 with the clamping groove 15, and the clamping block 16 is clamped into the interior of the clamping groove 15 to combine the No. 1 connecting block 6 and the No. 2 connecting block 7 into one. The inner wall of the No. 2 connecting block 7 fits against the outer wall of the transmission shaft 4 to limit the position of the transmission shaft 4 and prevent the transmission shaft 4 from deflecting during operation.

[0028] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A friction distance limiter for a scraper conveyor, comprising a housing (1), a fixed disc (2), an inner cylinder (3), a transmission shaft (4) and a friction plate (5), characterized in that: A fixed disk (2) is fixedly connected to one side of the outer shell (1), an inner cylinder (3) is provided inside the outer shell (1), a transmission shaft (4) is provided inside the inner cylinder (3), a plurality of friction plates (5) are provided inside the inner cylinder (3), and a limiting mechanism is provided at one end of the fixed disk (2); The limiting mechanism comprises a No. 1 connecting block (6), a No. 2 connecting block (7), a clamping slot (15) and a clamping block (16); one end of the fixed disk (2) is fixedly connected to the No. 1 connecting block (6); one end of the No. 1 connecting block (6) is provided with a No. 2 connecting block (7); the interior of the No. 1 connecting block (6) is provided with a clamping slot (15); one end of the No. 2 connecting block (7) is provided with a clamping block (16); the outer wall of the clamping block (16) is clamped and connected with the inner wall of the clamping slot (15).

2. The friction distance limiter of a scraper conveyor according to claim 1, characterized in that: The shapes of the clamping slot (15) and the clamping block (16) are both set to a cross structure, and one end of the transmission shaft (4) passes through the interior of the No. 1 connecting block (6) and the No. 2 connecting block (7).

3. The friction distance limiter of a scraper conveyor according to claim 2, characterized in that: The end of the No. 2 connecting block (7) away from the clamping block (16) is fixedly connected to a clamping sleeve (8), the outer sides of the No. 1 connecting block (6) and the No. 2 connecting block (7) are both provided with threaded surfaces, and the outer sides of the No. 1 connecting block (6) and the No. 2 connecting block (7) are threadedly connected to a fixing sleeve (9), and the interior of the fixing sleeve (9) is provided with a tapered groove matching the clamping sleeve (8).

4. The friction distance limiter of a scraper conveyor according to claim 1, characterized in that: The interior of the fixed plate (2) is provided with a plurality of No. 1 connection holes (12), and the distances between adjacent No. 1 connection holes (12) are equal. Fixing bolts are inserted into the interiors of the No. 1 connection holes (12), and the fixed plate (2) is detachably connected to the scraper conveyor via the fixing bolts.

5. The friction distance limiter of a scraper conveyor according to claim 1, characterized in that: The outer shell (1) is provided with a plurality of No. 3 connecting holes (14) at one end away from the fixed disk (2), and the inner tube (3) is provided with a plurality of No. 2 connecting holes (13) at one end. Connecting bolts (10) are inserted into the interiors of the No. 2 connecting holes (13), and one end of the connecting bolts (10) is threadedly connected to the inner wall of the No. 3 connecting hole (14).

6. The friction distance limiter of a scraper conveyor according to claim 1, characterized in that: A plurality of anti-collision strips (11) are provided on the outer side of the housing (1), and the plurality of anti-collision strips (11) are distributed in an equidistant annular state, and the shape of the anti-collision strips (11) is set to a rectangular structure.

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