Anti-fouling idler for a belt conveyor

Abstract

The application relates to the technical field of belt conveying equipment, in particular to a dirt-accumulation-preventing carrier roller of a belt conveyor. The roller comprises a shaft body and a roller cylinder arranged on the shaft body, the roller cylinder is provided with a protective sleeve, and the two ends of the protective sleeve in the axial direction are respectively provided with fixing structures; the fixing structures comprise mounting rings, radial fixing pieces and axial fixing pieces; the mounting rings are sleeved on the shaft body and abut against the end faces of the roller cylinder; the mounting rings comprise radial through holes and axial through holes; the end portions of the radial fixing pieces are connected with the shaft body after penetrating through the radial through holes; and the end portions of the axial fixing pieces are connected with the protective sleeve after penetrating through the axial through holes. The axial fixing, radial fixing and circumferential fixing of the protective sleeve are realized, and the fixing effect of the protective sleeve is good.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of belt conveying equipment, and particularly relates to a dirt-accumulation-preventing carrier roller of a belt conveyor. BACKGROUND

[0002] In a tobacco cut tobacco production line, a belt conveyor is an indispensable material conveying equipment, and a carrier roller is an important component of the belt conveyor. The carrier roller supports the conveying belt and the material, reduces the running resistance of the conveying belt, and ensures that the sag of the conveying belt does not exceed a certain limit, thereby ensuring the stable running of the conveying belt. The main material of the carrier roller is 45 steel. When the material is conveyed on the belt of the belt conveyor, the tobacco contains a certain amount of water, and the surface of the tobacco contains spices and sugar after the tobacco is subjected to processes such as material adding and flavor adding, thereby increasing the viscosity of the tobacco. The carrier roller of the conveyor is in contact with the conveying belt and the material remaining on the belt surface during running, and a large amount of tobacco dirt is attached to the surface of the roller body after a long time of running, thereby increasing the friction and causing uneven stress, which further affects the use effect of the belt conveyor, and causes phenomena such as belt deviation, deformation and wear. In severe cases, the belt may even scratch the rack of the belt conveyor, and the debris of the worn belt may fall into the tobacco, thereby causing serious quality risks. In addition, the carrier roller needs to be replaced due to wear during use, and the use cost is relatively high due to the large number of carrier rollers.

[0003] A protective sleeve that can be disassembled and replaced is usually selected to solve the above problems. For example, a dirt-proof sleeve for a split-type belt conveyor carrier roller disclosed in a patent document with the publication number CN207748399U includes a semicircular clamp body, the clamp body is provided with connecting ears at both ends, the connecting ears of the clamp body are provided with through holes in the axial direction, during use, two clamp bodies can be combined into a circular clamp, the two clamp bodies are fixedly connected through a bolt set, the clamp body is provided with a jackscrew hole in the radial direction, a locking jackscrew is arranged in the jackscrew hole, the clamp body is clamped on the outside of the carrier roller, the carrier roller does not directly contact the belt, and the phenomenon of tobacco dirt adhering to the carrier is eliminated. In the case that the carrier roller is not disassembled, two nylon sleeves are assembled on both sides of the carrier roller, and the sleeves are connected through bolts from both sides. The nylon sleeve can be disassembled during maintenance, and the disassembly and assembly are convenient. The nylon sleeve and the carrier roller are fixed in the circumferential direction through the jackscrew, and the cooperation and tension between the nylon sleeve and the carrier roller can be adjusted by adjusting the length of the jackscrew screwed in. The nylon sleeve is split type, and the two single structures are the same in size, are convenient to process, and are interchangeable.

[0004] In the prior art, first, the nylon sleeve and the carrier roller are only fixed in the circumferential direction through the jackscrew, and are not fixed in the axial direction, so the nylon sleeve is easy to move in the axial direction during transportation; second, two nylon sleeves are used, and the axial length of the nylon sleeve is short, and the belt is arranged on the nylon sleeve, so the axial movement of the two nylon sleeves will cause the belt to be deformed and wrinkled or tightly torn, or the belt will fall off the nylon sleeve; and finally, the material conveying will be affected. SUMMARY

[0005] The present application aims to solve the above problems, and provides a belt conveyor anti-fouling idler with good fixing effect of the protective sleeve on the roller.

[0006] The technical scheme of the present application is to provide a belt conveyor anti-fouling idler, which comprises a shaft body and a roller arranged on the shaft body, wherein a protective sleeve is arranged on the outer sleeve of the roller, and two ends of the protective sleeve in the axial direction are respectively provided with a fixing structure; the fixing structure comprises a mounting ring, a radial fixing member and an axial fixing member; the mounting ring is sleeved on the shaft body and abuts against the end surface of the roller; the mounting ring comprises a radial through hole and an axial through hole; the end of the radial fixing member passes through the radial through hole and is connected with the shaft body; the end of the axial fixing member passes through the axial through hole and is connected with the protective sleeve.

[0007] As a preferred embodiment of the present application, the mounting ring is provided with a plurality of radial through holes and a plurality of axial through holes, the plurality of radial through holes are arranged in a ring shape uniformly around the shaft body, the plurality of axial through holes are arranged in a ring shape uniformly around the shaft body, and the radial through holes and the axial through holes are arranged alternately.

[0008] As a preferred embodiment of the present application, the mounting ring comprises a protruding portion and a mounting portion in sequence along the direction from the end of the shaft body to the center, the outer diameter of the protruding portion is greater than the outer diameter of the mounting portion, the radial through hole is arranged in the mounting portion, and the axial through hole is arranged in the protruding portion; the end surface of the protective sleeve is connected with the protruding portion, and the inner ring surface of the protective sleeve abuts against the outer ring surface of the mounting portion.

[0009] As a preferred embodiment of the present application, the mounting portion and the protruding portion are integrally formed, or the mounting portion and the protruding portion are detachably connected through an axial screw.

[0010] As a preferred embodiment of the present application, the mounting ring is provided with an axial driving hole, the mounting portion is provided with a radial mounting hole in communication with the axial driving hole, a ball movable along the radial mounting hole is arranged in the radial mounting hole, the diameter of the ball is greater than the distance from the inner ring surface of the protective sleeve to the axial driving hole, and a driving rod movable along the axial driving hole is arranged in the axial driving hole, so as to push the ball to abut against the inner ring surface of the protective sleeve along the radial mounting hole during movement.

[0011] As a preferred embodiment of the present application, the end of the driving rod is provided with an inclined surface tangent to the surface of the ball.

[0012] As a preferred embodiment of the present application, the mounting portion is provided with a plurality of radial mounting holes in sequence along the axial direction, and the plurality of radial mounting holes are respectively provided with the balls.

[0013] As a preferred embodiment of the present application, the diameters of the plurality of balls decrease in turn in a direction from the end of the protective sleeve to the center.

[0014] As a preferred embodiment of the present application, the control member is further configured to drive the driving rod to move in a direction from the center of the shaft body to the end.

[0015] As a preferred embodiment of the present application, the mounting ring is further provided with an axial control hole, which is in communication with the end of the axial driving hole close to the roller through a U-shaped hole, so that the axial control hole, the U-shaped hole and the axial driving hole form a U-shaped passage together; the control member includes a control rod and a U-shaped spring; one end of the control rod is arranged in the axial control hole to form a passive end, and the other end of the control rod is arranged outside the mounting ring to form an active end; the U-shaped spring is arranged in the U-shaped passage, one end of the U-shaped spring is in abutment with the passive end of the control rod in the axial control hole, and the other end of the U-shaped spring is in abutment with the driving rod in the axial driving hole.

[0016] The present application has the following advantages:

[0017] 1. In the present application, first, a protective sleeve completely covering the roller is adopted to achieve good anti-fouling effect; second, on this basis, fixing structures are arranged at both ends of the protective sleeve to fix the protective sleeve: in the axial direction, the mounting ring is connected with the protective sleeve through the axial fixing member, and the two mounting rings and the protective sleeve form an integrated structure; at the same time, the mounting ring is in abutment with the roller, so that the axial movement of the integrated structure is necessarily stopped by the roller, thereby achieving axial fixation of the protective sleeve. In the radial and circumferential directions, the mounting ring is connected with the shaft body through the radial fixing member, avoiding radial movement and rotation of the mounting ring, i.e. stopping radial movement and rotation of the above-mentioned integrated structure, thereby achieving radial and circumferential fixation of the protective sleeve.

[0018] 2. In some embodiments, the mounting ring is divided into a mounting part and a protruding part, a radial through hole is arranged in the mounting part, an axial through hole is arranged in the protruding part, the end face of the protective sleeve is connected with the protruding part, and the inner ring face is in abutment with the mounting part. First, the axial two ends of the protective sleeve are necessarily protruded from the axial two ends of the roller, so as to fully cover the roller, and avoid that the material falls into the gap between the mounting ring and the protective sleeve and accumulates on the roller. Second, the contact area between the protective sleeve and the mounting ring is increased, and the friction force is increased; in particular, the contact between the protective sleeve and the mounting ring in the axial direction is realized, the friction force on the axial ring surface of the protective sleeve and the mounting ring is increased, the fixing effect between the protective sleeve and the mounting ring is further strengthened on the basis of the axial fixing part, the relative movement between the protective sleeve and the mounting ring is reduced, and the integration between the two mounting rings and the protective sleeve is improved. Third, the protective sleeve is annular and covers the mounting part, the mounting ring can be tightly clamped on the shaft body through the clamping effect of the protective sleeve, and the connection and fixing effect of the shaft body, the fixing structure and the protective sleeve is improved. Fourth, the protective sleeve covers the mounting part to cover the radial through hole and the radial fixing part, so as to avoid that the material accumulates on the radial through hole and the radial fixing part, and affects the adjustment and disassembly of the mounting ring.

[0019] 3. In some embodiments, a ball is arranged in the mounting part, and a driving rod which can push the ball to abut against the protective sleeve is arranged, the ball and the protective sleeve are combined in interference, the radial fixing between the mounting ring and the protective sleeve is realized, and the fixing effect between the mounting ring and the protective sleeve is further strengthened.

[0020] 4. In some embodiments, a ball with gradually changing diameter is arranged, which not only further strengthens the fixing effect between the mounting ring and the protective sleeve, but also pushes the protective sleeve outward through the ball, so that the two end parts of the protective sleeve form inclined surfaces which tilt towards the center, and when the belt is arranged on the protective sleeve, the inclined surfaces can prevent the belt from moving to the two ends, and play a belt deviation correcting effect. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a front view of a belt conveyor anti-accumulation idler embodiment 1.

[0022] Figure 2 It is a side view of a belt conveyor anti-accumulation idler embodiment 1.

[0023] Figure 3 It is a front view of a belt conveyor anti-accumulation idler embodiment 2.

[0024] Figure 4 It is a front view of a belt conveyor anti-accumulation idler embodiment 3.

[0025] Figure 5 It is Figure 4 It is an enlarged view of A in FIG. 6 and a working schematic view of the driving rod and the ball.

[0026] Figure 6 is a working schematic view of a belt conveyor anti-fouling idler embodiment 4;

[0027] Figure 7 is a partial structure schematic view of a belt conveyor anti-fouling idler embodiment 5;

[0028] In the figure: shaft body 1, roller 2, protective sleeve 3, mounting ring 41, mounting part 411a, protruding part 411b, radial through hole 412, axial through hole 413, radial fixing part 42, axial fixing part 43, axial driving hole 51, driving rod 511, radial mounting hole 52, ball 521, U-shaped channel 6, control rod 61, U-shaped spring 62. DETAILED DESCRIPTION

[0029] The following is a specific embodiment of the present application, and the technical solutions of the present application are further described in conjunction with the accompanying drawings, but the present application is not limited to these embodiments.

[0030] Embodiment 1

[0031] A belt conveyor anti-fouling idler, as shown in Figure 1 , first, like a conventional idler, includes a shaft body 1 and a roller 2 arranged on the shaft body 1. Generally, the shaft body 1 and the roller 2 are integrally formed, the shaft body 1 is connected with the motor output shaft through a shaft coupling, and the motor output shaft drives the shaft body 1 to rotate, thereby driving the roller 2 to rotate. The shaft body 1 can be linear, or as shown in Figure 1 , it can be stepped: that is, the shaft body 1 includes a part with a smaller outer diameter to facilitate fitting with the motor output shaft, and a part with a larger outer diameter to reduce the radial difference with the roller 2, thereby relieving the stress concentration problem, both of which belong to the shaft body 1.

[0032] In order to avoid the fact that after the belt conveyor runs for a long time, a large amount of soot is attached to the surface of the roller, thereby affecting the use effect of the belt conveyor, a protective sleeve 3 is further arranged on the surface of the roller 2, and the belt of the belt conveyor is arranged on the protective sleeve 3. The protective sleeve 3 is an integrally formed structure, has no gap, and has an axial length not less than the axial length of the roller 2, so that the protective sleeve 3 completely covers the outer surface of the roller 2, and the material falling from the belt will only fall on the protective sleeve 3, and the protective sleeve 3 can be replaced in time after being fouled, without affecting the service life of the idler itself. The material of the protective sleeve 3 is not limited, for example, it can be made of Teflon material, which has good wear resistance, long service life, smooth surface and is not easy to stick material, can effectively prevent the surface of the idler from being fouled, and reduce the replacement frequency of the protective sleeve 3 to reduce the cost; for example, it can also be made of nylon material, rubber material, etc. In this embodiment, a Teflon sleeve is used.

[0033] On one hand, since the size of the integrally formed protective sleeve 3 is just matched with the roller 2, it is difficult to put on the roller 2, so the inner diameter of the protective sleeve 3 is usually set to be slightly larger than the outer diameter of the roller 2 to facilitate the sleeve of the protective sleeve 3 and the disassembly, but it will cause the gap between the protective sleeve 3 and the roller 2; on the other hand, when using Teflon material as the protective sleeve 3, due to the smooth characteristics of Teflon material; this will make it difficult for the protective sleeve 3 to follow the roller 2 to rotate, and the protective sleeve 3 can also be axially displaced. Based on this, the two ends of the protective sleeve 3 are respectively provided with fixing structures to solve these problems.

[0034] As shown in Figure 1 The fixing structure includes a mounting ring 41, a radial fixing member 42 and an axial fixing member 43. The mounting ring 41 is provided with a radial through hole 412 and an axial through hole 413. The radial through hole 412 refers to the opening direction parallel to any diameter of the mounting ring 41, and the extension line points to the center of the mounting ring 41. The axial through hole 413 refers to the opening direction parallel to the direction of the center axis of the mounting ring 41. The radial through hole 412 and the axial through hole 413 are preferably threaded holes, and the radial fixing member 42 and the axial fixing member 43 are preferably bolts.

[0035] During installation, the protective sleeve 3 is first sleeved on the roller 2. Then the mounting ring 41 is sleeved on the shaft body 1 and moved to abut against the end face of the roller 2. First, the tail end of the radial fixing member 42 is controlled to rotate through the radial through hole 412 and abut against the ring surface of the shaft body 1. In some embodiments, the radial fixing member 42 can be a countersunk self-tapping screw. The self-tapping structure enables it not only to abut against the ring surface of the shaft body 1, but also to tap into the shaft body 1, thereby improving the fixing effect. The countersunk structure enables it to completely sink into the radial through hole 412, thereby avoiding the head end exposed outside to be affected by external force and loosened. Secondly, the tail end of the axial fixing member 43 is controlled to rotate through the axial through hole 413 and abut against the end face of the protective sleeve 3. In some embodiments, especially when the protective sleeve 3 is made of Teflon material, the fixing effect of the protective sleeve 3 by abutting is still limited, so the tail end of the axial fixing member 43 is further tapped into the protective sleeve 3 from the end face of the protective sleeve 3, thereby improving the fixing effect. Similarly, the axial fixing member 43 preferably adopts a countersunk bolt, and the axial fixing member 43 is completely sunk into the axial through hole 413 by a screwdriver, thereby avoiding the head end exposed outside to be affected by external force and loosened.

[0036] Based on the radial fixation of the mounting ring 41 and the shaft 1, the rotation of the shaft 1 can drive the mounting ring 41 to rotate, and the mounting ring 41 is not easy to move radially or rotate relative to the shaft 1; based on the axial fixation of the mounting ring 41 and the protective sleeve 3, the mounting ring 41, which rotates with the shaft 1, can drive the protective sleeve 3 to rotate accordingly; on this basis, based on the abutment between the mounting ring 41 and the roller 2, the roller 2 stops the mounting ring 41, and thus stops the axial movement of the protective sleeve 3; thus, the fixation of the protective sleeve 3 on the idler roller is completed.

[0037] The mounting ring 41 can be a single, integral ring structure or composed of two semi-rings joined together. In the former embodiment, a gap may exist between the mounting ring 41 and the shaft 1 to facilitate the installation and removal of the mounting ring 41; therefore, the fixing of the mounting ring 41 to the shaft 1 mainly relies on the radial fixing member 42. To further improve the fixing effect, such as... Figure 2 As shown, the mounting ring 41 is provided with a plurality of radial through holes 412 and a plurality of axial through holes 413. In this embodiment, there are three radial through holes 412 and three axial through holes 413. The three radial through holes 412 are uniformly arranged in a ring around the shaft body 1; the three axial through holes 413 are uniformly arranged in a ring around the shaft body 1; and the radial through holes 412 and axial through holes 413 are alternately arranged. In the latter embodiment, the connection between the two half rings can be adjusted to make the half ring abut against the shaft body 1. For example, the curvature of the inner ring surface of the half ring is consistent with the curvature of the outer ring surface of the shaft body 1. Then, connecting ears with through holes are provided at both ends of the half ring. After aligning the connecting ears of one half ring with the connecting ears of the other half ring, they are connected with screws and nuts until the half ring is tightly attached to the shaft body 1.

[0038] Example 2

[0039] This embodiment is basically the same as embodiment 1, except that the structure of the mounting ring 41 is different.

[0040] like Figure 3 As shown, the mounting ring 41 includes a protrusion 411b and a mounting portion 411a sequentially along the direction from the end of the shaft 1 to the center. The protrusion 411b and the mounting portion 411a can be regarded as two rings with the same inner diameter but different outer diameters, and the outer diameter of the protrusion 411b is larger than the outer diameter of the mounting portion 411a. An axial through hole 413 is provided on the portion of the protrusion 411b that protrudes from the mounting portion 411a, and a radial through hole 412 is provided on the mounting portion 411a. With this mounting ring 41 structure, the contact area between the protective sleeve 3 and the mounting ring 41 is increased, and the fixing effect is better.

[0041] like Figure 3 In the schematic representation of the left-middle end, the mounting part 411a and the protrusion 411b can be integrally formed; for example... Figure 3In the schematic view of the right end, the mounting portion 411a and the protruding portion 411b can also be separate. Different structures will have different subsequent installation steps and different choices of the protective sleeve 3, which will be described below.

[0042] When the mounting portion 411a and the protruding portion 411b are integrally formed, the protective sleeve 3 is preferably made of a material that is relatively good in elasticity and can be compressed in the axial direction by a certain distance, such as a nylon tube. During installation, first, a mounting ring 41 is sleeved on one end of the shaft body 1, and after being moved to abut against the end face of the roller 2, it is fixed by the radial fixing member 42 as in Embodiment 1. Then, the protective sleeve 3 is sleeved from the other end of the shaft body 1, and after being moved to abut against the end face of the protruding portion 411b of the aforementioned mounting ring 41, axial fixation is temporarily not performed. Then, another mounting ring 41 is sleeved on the other end of the shaft body 1, and the mounting portion 411a of the mounting ring 41 is inserted between the shaft body 1 and the protective sleeve 3 and abuts against the end face of the roller 2, and the protective sleeve 3 is cut to an appropriate axial length according to the condition that the end face of the protective sleeve 3 abuts against the end face of the protruding portion 411b thereof. Then, an external force is applied to compress the length of the protective sleeve 3, so that the radial through hole 412 of the mounting ring 41 is exposed, and the radial fixing member 42 is installed so that the tail end thereof abuts against and even penetrates into the shaft body 1, and the head end sinks into the radial through hole 412. Finally, the compression of the protective sleeve 3 is released, and after the protective sleeve 3 rebounds, the two ends of the protective sleeve 3 are connected with the protruding portions 411b of the two mounting rings 41 by the axial fixing member 43.

[0043] When the mounting portion 411a and the protruding portion 411b are separate, the material of the protective sleeve 3 is not limited, but a connecting structure needs to be additionally provided between the mounting portion 411a and the protruding portion 411b, such as axial through holes provided on the mounting portion 411a and the protruding portion 411b and axial screws. At this time, during installation, first, the mounting portion 411a is sleeved on both ends of the shaft body 1 and is fixed by the radial fixing member 42. Then, the protective sleeve 3 is sleeved, and the protective sleeve 3 covers the two mounting portions 411a and the roller 2. Then, the protruding portion 411b is sleeved on both ends of the shaft body 1, and the axial screws are sequentially inserted through the through holes of the protruding portion 411b and the through holes of the mounting portion 411a and abut against the end face of the roller 2 to complete the fixation of the protruding portion 411b and the mounting portion 411a. Finally, the protruding portion 411b and the protective sleeve 3 are connected by the axial fixing member 43.

[0044] Embodiment 3

[0045] This embodiment is basically the same as Embodiment 2, and the main difference is that a radial fixing structure is additionally provided between the mounting ring 41 and the protective sleeve 3.

[0046] As Figure 4 and Figure 5As shown, the mounting ring 41 is provided with an axial driving hole 51, which is arranged on the mounting portion 411a and the portion of the protruding portion 411b that is not protruding from the mounting portion 411a. When the mounting portion 411a and the protruding portion 411b are separate, the axial through hole in the embodiment 2 can be directly used as the axial driving hole 51.

[0047] Meanwhile, the radial mounting hole 52 is also arranged in the mounting portion 411a, which is in communication with the axial driving hole 51 at one end and with the outer ring surface of the mounting portion 411a at the other end.

[0048] A ball 521 is arranged in the radial mounting hole 52, and the diameter of the ball 521 is greater than the distance from the inner ring surface of the protective sleeve 3 to the plane of the inner wall of the axial driving hole 51 closest to the protective sleeve 3. According to the direction in the Figure 5 , i.e. the diameter of the ball 521 is greater than the distance from the inner ring surface of the protective sleeve 3 to the inner wall of the axial driving hole 51. Meanwhile, the ball 521 can be controlled to move along the radial mounting hole 52 and not fall out of the radial mounting hole 52. The specific arrangement of the embodiment is as shown in Figure 5 , i.e. the inner diameter of the inner wall of the radial mounting hole 52 closest to the protective sleeve 3 is not less than the diameter of the ball 521, so that the ball 521 can move radially in this part. The inner wall of the radial mounting hole 52 closest to the shaft body 1 is provided with a magnetic protruding ring, and the inner diameter of the magnetic protruding ring is less than the diameter of the ball 521. Under the condition of no external force, the ball 521 is adsorbed on the magnetic protruding ring and will not fall out of the radial mounting hole 52. The inner diameter of the magnetic protruding ring should not be too small, as shown in Figure 5 , i.e. it should be ensured that when the ball 521 is adsorbed on the magnetic protruding ring, the ball 521 can protrude from the radial mounting hole 52 to form the to-be-contacted portion.

[0049] A driving rod 511 is arranged in the axial driving hole 51. The driving rod 511 can be a straight rod, and correspondingly the axial driving hole 51 can be a smooth hole. The driving rod 511 is inserted into the axial driving hole 51 by axial translation. At this time, the driving rod 511 is preferably a magnetic adsorption member, so as to be magnetically connected with the end surface of the roller 2, avoiding falling out after insertion. The driving rod 511 can also be a threaded rod, and correspondingly the axial driving hole 51 is a threaded hole. The driving rod 511 is gradually inserted and fixed in the axial driving hole 51 by threaded rotation. The embodiment adopts the latter implementation. When the mounting portion 411a and the protruding portion 411b are separate, the cooperation of the threaded driving rod 511 and the axial driving hole 51 can also play the role of connecting and fixing the mounting portion 411a and the protruding portion 411b.

[0050] When the driving rod 511 is inserted into the axial driving hole 51, the end of the driving rod 511 will meet the to-be-contacted part of the ball 521, and based on the activity of the ball 521, the driving rod 511 is continuously pushed, and after overcoming the attraction between the ball 521 and the magnetic attraction convex ring, the ball 521 can be driven to move in the radial direction close to the protective sleeve 3 until the driving rod 511 is no longer stopped. At this time, the ball 521 is clamped between the protective sleeve 3 and the driving rod 511. While the diameter of the ball 521 is controlled above, the driving rod 511 is rigid, and the protective sleeve 3 is flexible, the ball 521 will be inserted into the protective sleeve 3 and be interference combined with the protective sleeve 3. At this time, the fixing of the mounting ring 41 and the protective sleeve 3 in the radial direction is realized, and the fixing effect is improved.

[0051] Among them, in order to make the driving rod 511 better force the ball 521, the end of the driving rod 511 is provided with a slope that can be tangent to the surface of the ball 521.

[0052] Embodiment 4

[0053] This embodiment is basically the same as embodiment 3, the difference mainly lies in that the balls of different diameters are added.

[0054] As shown in Figure 6 The mounting part 411a is sequentially provided with a plurality of radial mounting holes 52 in the axial direction, and a plurality of balls 521 are respectively arranged in the radial mounting holes 52, and the diameters of the balls 521 gradually decrease from the end of the protective sleeve 3 to the center.

[0055] Since the ball 521 close to the end of the protective sleeve 3 has a larger diameter, before the protective sleeve 3 is fixed by the axial fixing part 43, the closer to the end of the protective sleeve 3, the more easily the part is deformed under stress. Therefore, at this time, the end of the protective sleeve 3 will be pushed out by the ball 521 with a larger diameter and become inclined, and the end of the protective sleeve 3 can form an inclined surface inclined to the center through the balls 521 with diameters changing in sequence. When the belt is arranged on the protective sleeve 3, if the belt wants to move to the axial both ends, it will be stopped by the inclined surface, so it can play a belt deviation correction effect.

[0056] Embodiment 5

[0057] This embodiment is basically the same as embodiment 4, the difference mainly lies in that it further includes a control part.

[0058] In the above embodiment 4, the driving rod 511 is moved in the direction from the end to the center, that is, the larger-diameter ball 521 is first driven to move radially, and then the smaller-diameter ball 521 is driven to move radially. Compared with driving the smaller-diameter ball, driving the larger-diameter ball is relatively more difficult because the larger-diameter ball needs to move a longer distance. Moreover, after the larger-diameter ball 521 moves radially, the end of the protective sleeve 3 has been deformed outwardly to form a substantially inclined surface, and when the smaller-diameter ball is subsequently driven to move, the ball is subjected to a smaller stopping force, and thus it is easier to drive the ball. This operation mode is relatively unsmooth.

[0059] Therefore, in the present embodiment, a control member for driving the driving rod 511 to move in the direction from the center of the shaft body 1 to the end is further included, that is, the smaller-diameter ball 521 is first driven to move radially, and then the larger-diameter ball 521 is driven to move radially, so that the end of the protective sleeve 3 is gradually deformed in the direction from the center to the end, and the deformation is more smooth.

[0060] There are many design modes of the control member, for example: first, a first rack is arranged on the driving rod 511 in the axial direction. The control member includes a control rod and a gear, one end of the control rod is a passive end, the passive end is located in the axial driving hole 51 and is provided with a second rack in the axial direction, the other end is located outside the mounting ring 41 to form an active end; and the second rack is engaged with the first rack through the gear arranged in the axial driving hole 51. Then, the operator can drive the control rod passive end second rack to move in the direction of the center of the shaft body 1 by moving the control rod active end in the direction of the center of the shaft body 1, and then drive the gear to rotate through the engagement, and the gear rotation drives the first rack to move in the direction of the end of the shaft body 1, so as to realize the movement of the driving rod 511 in the direction from the center of the shaft body 1 to the end.

[0061] For another example, as shown in Figure 7 , the mounting ring 41 is further provided with an axial control hole, and the axial control hole close to one end of the roller 2 is communicated with the axial driving hole 51 close to one end of the roller 2 through a U-shaped hole to form a U-shaped channel 6 together. The control member includes a control rod 61 and a U-shaped spring 62; one end of the control rod 61 is arranged in the axial control hole to form a passive end, and the other end is arranged outside the mounting ring 41 to form an active end; the U-shaped spring 62 is arranged in the U-shaped channel 6, one end of the U-shaped spring 62 abuts against the passive end of the control rod 61 in the axial control hole, and the other end abuts against the driving rod 511 in the axial driving hole 51. In use, the control rod 61 is moved to the right according to the direction in Figure 7 , the U-shaped spring 62 is compressed, and the other end of the U-shaped spring 62 will move to the left to restore the natural length of the U-shaped spring 62, so as to promote the left movement of the driving rod 511.

[0062] After the control rod 61 is moved by a proper length so that the driving rod 511 completes the pushing of the ball 521, the driving end of the control rod 61 is fixedly connected with the mounting ring 41 through a screw. Alternatively, the axial control hole can be a threaded hole, the control rod 61 can be a threaded rod, and an abutting block is arranged at the end of the U-shaped spring 62 through a rotating bearing. The threaded structure is arranged so that the control rod 61 can be directly fixed by screwing after being rotated and moved to a required position. The bearing and the abutting block are arranged so that the rotation of the control rod 61 does not drive the end of the U-shaped spring 62 to rotate and affect the elastic effect of the U-shaped spring 62.

[0063] The specific embodiments described herein are merely illustrative of the spirit of the present application. Those skilled in the art of the present application can make various modifications or supplements to the described specific embodiments or replace them with similar ways, without departing from the spirit of the present application or exceeding the scope defined by the appended claims.

Claims

1. A belt conveyor anti-fouling idler roller, comprising a shaft (1) and a roller (2) disposed on the shaft (1), characterized in that: The roller (2) is covered with a protective sleeve (3), and the protective sleeve (3) has a fixing structure at both ends in the axial direction. The fixing structure includes a mounting ring (41), a radial fixing member (42), and an axial fixing member (43). The mounting ring (41) is sleeved on the shaft (1) and abuts against the end face of the roller (2). The mounting ring (41) includes a radial through hole (412) and an axial through hole (413). The end of the radial fixing member (42) passes through the radial through hole (412) and is connected to the shaft (1). The end of the axial fixing member (43) passes through the axial through hole (413) and is connected to the protective sleeve (3). The mounting ring (41) includes a protrusion (411b) and a mounting portion (411a) in sequence from the end of the shaft (1) to the center. The outer diameter of the protrusion (411b) is larger than the outer diameter of the mounting portion (411a). The radial through hole (412) is provided in the mounting portion (411a), and the axial through hole (413) is provided in the protrusion (411b). The end face of the protective sleeve (3) is connected to the protrusion (411b), and the inner ring surface of the protective sleeve (3) abuts against the outer ring surface of the mounting portion (411a). The mounting portion (411a) and the protrusion (411b) are integrally formed; or the mounting portion (411a) and the protrusion (411b) are detachably connected by axial screws. The mounting ring (41) is provided with an axial drive hole (51), and the mounting part (411a) is provided with a radial mounting hole (52) communicating with the axial drive hole (51); a ball (521) that can move along the radial mounting hole (52) is provided in the radial mounting hole (52), and the diameter of the ball (521) is greater than the distance from the inner ring surface of the protective sleeve (3) to the axial drive hole (51); a drive rod (511) that can move along the axial drive hole (51) to push the ball (521) along the radial mounting hole (52) to abut against the inner ring surface of the protective sleeve (3) during the movement is provided in the axial drive hole (51). The mounting part (411a) is provided with a plurality of radial mounting holes (52) in sequence along the axial direction, and the ball bearings (521) are respectively provided in the plurality of radial mounting holes (52). The diameter of several of the balls (521) decreases sequentially from the end of the protective sleeve (3) to the center; The drive rod (511) is rigid, and the protective sleeve (3) is flexible; By using ball bearings (521) with varying diameters, the two ends of the protective sleeve (3) can form inclined surfaces that slope towards the center. When the belt is placed on the protective sleeve (3), the inclined surfaces can prevent the belt from moving to both ends, thus achieving the effect of belt correction. It also includes a control for driving the drive rod (511) to move in a direction from the center of the shaft (1) to its end; The mounting ring (41) is also provided with an axial control hole. The end of the axial control hole near the roller (2) is connected to the end of the axial drive hole (51) near the roller (2) through a U-shaped hole, so that the axial control hole, the U-shaped hole, and the axial drive hole (51) together form a U-shaped channel (6). The control component includes a control rod (61) and a U-shaped spring (62). One end of the control rod (61) is set in the axial control hole to form a passive end, and the other end is set outside the mounting ring (41) to form an active end. The U-shaped spring (62) is set in the U-shaped channel (6). One end of the U-shaped spring (62) abuts against the passive end of the control rod (61) in the axial control hole, and the other end abuts against the drive rod (511) in the axial drive hole (51).

2. The anti-fouling idler roller for a belt conveyor according to claim 1, characterized in that: The mounting ring (41) is provided with a plurality of radial through holes (412) and a plurality of axial through holes (413). The plurality of radial through holes (412) are arranged in a ring-shaped uniform arrangement with the shaft (1) as the center; the plurality of axial through holes (413) are arranged in a ring-shaped uniform arrangement with the shaft (1) as the center; the radial through holes (412) and axial through holes (413) are arranged alternately.

3. The anti-fouling idler roller for a belt conveyor according to claim 1, characterized in that: The end of the drive rod (511) is provided with an inclined surface that is tangent to the surface of the ball (521).

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