Feeding belt return bearing mechanism

Abstract

The utility model discloses a feeding belt return stroke bearing mechanism which comprises a support body, a feeding belt bearing wheel and a feeding belt side wheel set, the support body comprises a horizontal groove rail, a lead screw and a jacking arm, the lead screw is rotatably installed in the horizontal groove rail and is in meshing transmission with the bottom end of the jacking arm, and the lead screw drives the jacking arm through rotation to achieve lifting of the upper end of the jacking arm; the feeding belt bearing wheel is rotationally installed at the upper end of the jacking arm and abuts against the surface of the feeding belt in the return stroke in the working state, and the feeding belt in the return stroke is in an arch shape with the edges on the two sides lowered and the middle higher. The contact area of the bearing wheels and the feeding belt is reduced, static electricity is reduced, adhesion of residual materials and the feeding belt is reduced, the stability and reliability of operation of the feeding belt are guaranteed, the maintenance cost and the assembly and disassembly difficulty of the mechanism are greatly reduced due to the light-weight design, the mechanism body does not need to be replaced basically, and the production cost is reduced. And only the bearing wheel and the limiting wheel are maintained and replaced in time, so that the cost is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of transportation equipment, in particular to a return support mechanism for a feeding belt. Background Art

[0002] The existing long-distance feeding belt is prone to sagging during the return process, so a supporting mechanism is generally set up. The current supporting mechanism uses a long roller, most of which are made of metal. However, this long roller is very easy to adhere to slag, which causes the resistance of the long roller itself to increase, affecting the transmission efficiency and stability, and is easy to damage. Once damaged, the entire roller body needs to be replaced, which is inconvenient to replace and repair, and the replacement cost is very high. In addition, the inventor found that no matter how to treat it, there will always be a certain amount of slag adhered to the feeding belt, and when the adhesion amount reaches a certain level, the slag adhered to the feeding belt reaches "saturation" and basically no longer adheres. Therefore, it is a technical problem that has been difficult for technicians in this field to solve for a long time to change the current situation of reducing the adhesion of slag on the long roller. The inventor has also tried to design a scraper for the long roller in actual work, but due to the length, the scraper is difficult to install, and this will further increase the cost. There are now some devices that use high-pressure water to clean the feeding belt, which ensure the cleanliness of the long roller by reducing the adhesion of slag on the feeding belt, but the cost is relatively high and the water consumption is also large.

[0003] Therefore, developing a new feeding belt return support mechanism not only has urgent research value, but also has good economic benefits and industrial application potential, which is the driving force and basis for the completion of the utility model. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the inventors conducted in-depth research and completed the present utility model after paying a lot of creative work.

[0005] Specifically, the technical problem to be solved by the utility model is to provide a feeder belt return support mechanism, which reduces the amount of material residue adhering to the support mechanism and reduces maintenance costs, so as to solve the technical problems in the background technology.

[0006] In order to solve the above technical problems, the technical solution of the utility model is: a feeding belt return support mechanism, comprising:

[0007] The support body comprises a horizontal groove rail, a lead screw and a lifting arm, wherein the lead screw is rotatably installed in the horizontal groove rail and meshes with the bottom end of the lifting arm for transmission, and the lead screw drives the lifting arm by rotation to realize the lifting of the upper end thereof;

[0008] The feeder belt supporting wheel is rotatably mounted on the upper end of the lifting arm, and contacts the surface of the return feeder belt in the working state, so that the return feeder belt contacts the surface of the return feeder belt to form an arch shape with lower edges on both sides and a higher middle;

[0009] And a feeder belt side wheel group, the feeder belt side wheel group is located on both sides of the return feeder belt (generally set as two groups), the feeder belt side wheel group includes a pressure wheel, a supporting wheel and a deviation correction wheel, the pressure wheel and the supporting wheel are arranged one above and one below, and a gap is arranged between the two for the return feeder belt to pass through, the deviation correction wheel is arranged between the pressure wheel and the supporting wheel, and in a working state, it contacts the two side edges of the return feeder belt to prevent the return feeder belt from running off.

[0010] As a preferred technical solution, screw limit seats are provided at both ends of the horizontal groove rail, and the screw is rotatably installed in the horizontal groove rail using the screw limit seats.

[0011] As a preferred technical solution, the lead screw has a quick-connect port for an external rotation drive source.

[0012] As a preferred technical solution, the rotation driving source can be a rotary motor. Of course, the rotating shaft of the rotary motor can also be connected to the lead screw by a coupling or other mechanism.

[0013] As a preferred technical solution, the jacking arms are divided into two groups and are symmetrically arranged; the bottom ends of the jacking arms are respectively hinged with screw engagement seats by means of rotating shafts, and the upper ends are respectively hinged to the same supporting wheel mounting seat by means of rotating shafts, so that when the bottom ends of the jacking arms are opened to both sides, the upper ends drive the supporting wheel mounting seat to descend, and when the bottom ends of the jacking arms are moved toward the middle, the upper ends drive the supporting wheel mounting seat to rise.

[0014] As a preferred technical solution, a first notch is provided at the bottom of the horizontal groove rail, a hinge seat extending out of the first notch is provided at the bottom of the lead screw engagement seat, and the bottom end of the lifting arm is connected to the hinge seat by a rotating shaft to achieve hinge connection with the lead screw engagement seat. Based on this structure, because the first notch is located in the middle of the return feeder belt, which is theoretically the most serious position for residual slag to fall, and the first notch is provided at the bottom of the horizontal groove rail, it will avoid slag falling into the horizontal groove rail to damage the screw thread to the greatest extent, thereby improving the overall service life of the bracket body.

[0015] As a preferred technical solution, the screw is provided with two sections of threads in opposite directions, and the screw engaging seats of the two groups of the lifting arms are respectively installed on the two sections of threads in opposite directions, so that when the screw rotates, the two screw engaging seats can be synchronously driven to move toward or away from each other. When the two screw engaging seats move toward each other, the bottom end of the lifting arm opens to both sides, and the upper end drives the supporting wheel mounting seat to descend. When the two screw engaging seats move away from each other, the bottom end of the lifting arm opens to both sides, and the upper end drives the supporting wheel mounting seat to descend.

[0016] As a preferred technical solution, the upper edge of the jacking arm is provided with a gear, and the upper ends of the two groups of jacking arms are linked by gear meshing. Based on this gear form, the meshing linkage makes the upper ends of the two groups of jacking arms more stable, which has a better stabilizing effect on the supporting wheel mounting seat.

[0017] As a preferred technical solution, the feeder belt supporting wheel is installed on the supporting wheel mounting seat by means of a wheel axle. Thus, when the bottom end of the lifting arm moves toward the middle, the upper end drives the supporting wheel mounting seat to rise, and the feeder belt supporting wheel can rise synchronously, touch the middle position of the return feeder belt, and lift the middle to a certain arc, and when the bottom end of the lifting arm opens to both sides, the upper end drives the supporting wheel mounting seat to descend, and the feeder belt supporting wheel can descend synchronously, and the middle position of the return feeder belt also descends, and the bending degree of the return feeder belt is also reduced accordingly.

[0018] As a preferred technical solution, the feed belt supporting wheel adopts a ceramic wheel, a nylon polytetrafluoroethylene wheel or a rubber wheel with a smooth surface, and preferably, a ceramic wheel is adopted.

[0019] As a preferred technical solution, the feed belt support wheel adopts a drum wheel with a central protrusion or a wave wheel with a grooved surface. Based on this structure, in addition to minimizing the adhesion of the material residue itself, it can also minimize the static electricity generated by the friction between the support wheel and the feed belt.

[0020] As a preferred technical solution, the feeder belt side wheel set is movably mounted at both ends of the horizontal groove rail, restricted to reciprocating motion on the lead screw, and linked with the feeder belt supporting wheel. That is, when the feeder belt supporting wheel rises and lifts the middle of the return feeder belt to a certain arc, the feeder belt side wheel set will move inward to keep the restriction on the two side edges of the return feeder belt, and when the feeder belt supporting wheel drops and the curvature of the middle of the return feeder belt decreases, the return feeder belt will naturally flatten under the action of its flexibility, and the feeder belt side wheel set will be pushed outward, and the feeder belt side wheel set will still keep the restriction on the two side edges of the return feeder belt.

[0021] As a preferred technical solution, the feeding belt side wheel set also includes

[0022] A movable base, which is sleeved on the lead screw, located in the horizontal groove rail, and restricted to reciprocate on the lead screw, and the movable base is linked with the lifting and lowering of the feed belt supporting wheel;

[0023] An ear seat, the ear seat is fixed to the upper part of the movable base and extends upward to the outside of the horizontal groove rail;

[0024] And a mounting rod seat, the pressure wheel, the supporting wheel and the correcting wheel are all rotatably mounted on the mounting rod seat, wherein the correcting wheel is directly rotatably mounted on the mounting rod seat, the pressure wheel and the supporting wheel are arranged one above and one below, and the bottom end of the mounting rod seat is hinged on the ear seat.

[0025] As a preferred technical solution, a linkage structure is provided between the lead screw engagement seat and the movable base, and the linkage structure drives the movable base to move inward synchronously after the lead screw engagement seat moves inward for a certain distance.

[0026] As a preferred technical solution, the linkage structure includes a first claw fixedly connected to the screw engagement seat and a second claw fixedly connected to the movable base. The first claw and the second claw are both L-shaped and installed relative to each other. When the first claw moves a certain distance, it will interfere with the second claw, thereby driving the movable base to move inward synchronously.

[0027] As a preferred technical solution, when the feeding belt supporting wheel is at the lowest point, the relative movement distance between the first clamping claw and the second clamping claw is L1, the width of the feeding belt is L2, and L2 / L1=100 / (15-18).

[0028] In more detail, when the feed belt support wheel is at the lowest point, it will naturally flatten under the flexible action of the feed belt, and the feed belt side wheel group will be pushed outward to the farthest limit distance. At this time, the first clamping claw is also at the farthest limit distance. When the screw engagement seat moves towards each other, the feed belt support wheel will rise, and at the same time, the first clamping claw will move inward, and after moving a certain distance, it will contact with the second clamping claw, driving the second clamping claw to move inward, that is, driving the movable base to move inward, so as to realize the inward movement of the feed belt side wheel group, without leaving the edge of the return feed belt, and still maintaining the restriction on the two side edges of the return feed belt.

[0029] As a preferred technical solution, the ear seat is provided with a slope surface having an inclined angle with respect to the horizontal groove rail, and the slope surface is inclined downward along the outward direction of the horizontal groove rail.

[0030] As a preferred technical solution, the slope has an inclination angle of 15-20 degrees.

[0031] As a preferred technical solution, a second slot is opened on the upper portion of the horizontal slot, and the ear seat extends to the outside of the horizontal slot through the second slot.

[0032] Compared with the prior art, the beneficial effects of the utility model are:

[0033] 1. The utility model designs a feeder belt supporting wheel, which, in cooperation with the support body, can make the return feeder belt into an arch shape with lowered edges on both sides and higher in the middle under working conditions. Based on this structure, the lower surface of the return feeder belt will be adhered to material slag, and the bow shape can make the unstable material slag adhered to the surface of the feeder belt fall off, reducing the adhesion of material slag on the surface of the feeder belt.

[0034] 2. The feed belt support wheel of the utility model is different from the traditional long roller made of metal. Instead, it adopts a ceramic wheel and a nylon PTFE wheel with a smooth surface. The overall structure reduces the contact area with the feed belt, reduces the wear on the feed belt, and prolongs the service life of the feed belt. It also reduces the generation of static electricity and adhesion to the feed belt, ensuring the stability and reliability of the feed belt operation. This lightweight design also greatly reduces the maintenance cost and the difficulty of loading and unloading the mechanism. For example, the bracket body and the feed belt side wheel group will basically not be damaged, and the feed belt support wheel may have a shorter replacement cycle. However, the labor and product costs of simply replacing the feed belt support wheel are greatly reduced compared to the traditional replacement of the long roller made of metal. Moreover, due to its lightweight, the feed belt support wheel can also be provided with a scraper as needed, which basically does not increase the cost too much.

[0035] 3. The utility model is provided with a feed belt side wheel group. Through the refined design of the structure, the feed belt side wheel group can always limit and correct the edges of both sides of the feed belt, ensuring the smooth transmission process, making the feed belt more stable during movement, and preventing instability caused by vibration. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0037] Figure 2 is a schematic structural diagram of the feed belt supporting wheel in Example 1;

[0038] Figure 3 It is a schematic diagram of the exploded structure of the parts of the utility model;

[0039] Figure 4 It is a structural schematic diagram of the jacking arm and linkage structure in the utility model;

[0040] Figure 5 It is a structural schematic diagram of a bidirectional threaded rod in the utility model;

[0041] Figure 6 is a schematic side view of the jacking arm;

[0042] Figure 7 is a schematic structural diagram of the feed belt supporting wheel in Example 2;

[0043] Figure 8 It is a cross-sectional schematic diagram when the feeding belt is in a lifted state;

[0044] Fig. 9 It is a schematic diagram of the structure of the side wheel group of the feed belt.

[0045] In the figure:

[0046] Bracket body 1; horizontal groove rail 11; lead screw 12; lifting arm 13; lead screw limit seat 14; lead screw engagement seat 15; hinge seat 151; quick-connect port 16;

[0047] Feeding belt supporting wheel 2; supporting wheel mounting seat 21;

[0048] Feeding belt side wheel set 3; pressing wheel 31; supporting wheel 32; deviation correction wheel 33; movable base 34; ear seat 35; mounting rod seat 36; second notch 37; first clamping claw 38; second clamping claw 39;

[0049] Feeding belt 4. DETAILED DESCRIPTION

[0050] The utility model is further described below in conjunction with specific embodiments. However, the use and purpose of these exemplary embodiments are only used to illustrate the utility model, and do not constitute any form of limitation on the actual protection scope of the utility model, nor do they limit the protection scope of the utility model to them.

[0051] Example 1

[0052] like Figure 1-Figure 9 As shown, a feeder belt return support mechanism includes: a bracket body 1, a feeder belt supporting wheel 2 and a feeder belt side wheel group 3, the bracket body 1 includes a horizontal groove rail 11, a screw 12 and a lifting arm 13, the screw 12 is rotatably installed in the horizontal groove rail 11, meshing with the bottom end of the lifting arm 13 for transmission, and the screw drives the lifting arm 13 by rotation to realize the lifting of the upper end thereof.

[0053] Wherein, screw limit seats 14 are provided at both ends of the horizontal groove rail 11, and the screw is rotatably installed in the horizontal groove rail by means of the screw limit seats. The screw has a quick-connect port 16 for an external rotation drive source. The rotation drive source can be a rotary motor. Of course, the rotating shaft of the rotary motor can also form a transmission connection with the screw by means of a coupling or the like. In this embodiment, the screw is connected to the rotary motor by means of a quick-connect port 15, and the rotary motor is not shown in the figure.

[0054] In this embodiment, the lifting arms 13 are divided into two groups and are symmetrically arranged; the bottom ends of the lifting arms 13 are respectively hinged with a screw engagement seat 15 by a rotating shaft, and the upper ends are respectively hinged on the same supporting wheel mounting seat 21 by a rotating shaft, so that when the bottom ends of the lifting arms 13 are opened to both sides, the upper ends drive the supporting wheel mounting seat to descend, and when the bottom ends of the lifting arms are moved toward the middle, the upper ends drive the supporting wheel mounting seat to rise. In addition, a first notch (not shown in the figure) is provided at the bottom of the horizontal groove rail 11, and an articulated seat 151 extending outside the first notch is provided at the bottom of the screw engagement seat 15, and the bottom end of the lifting arm is connected to the articulated seat 151 by a rotating shaft to achieve articulation with the screw engagement seat. Based on this structure, because the position of the first slot is in the middle of the return feeding belt, theoretically it is the position where residual slag falls most seriously, and opening the first slot at the lower part of the horizontal groove rail will minimize the damage to the thread of the lead screw caused by the slag falling into the horizontal groove rail, thereby increasing the overall service life of the bracket body.

[0055] In this embodiment, the screw 12 is provided with two sections of threads in opposite directions (not shown in the figure). In this embodiment, the left side is a trapezoidal thread in the counterclockwise direction, and the right side is a trapezoidal thread in the clockwise direction. The screw engaging seats 15 of the two groups of the jacking arms are respectively engaged and installed on the two sections of threads in opposite directions. When the screw 12 rotates, the two screw engaging seats can be synchronously driven to move toward or away from each other. When the two screw engaging seats move toward each other, the bottom end of the lifting arm 13 opens to both sides, and the upper end drives the supporting wheel mounting seat to descend. When the two screw engaging seats move away from each other, the bottom end of the lifting arm opens to both sides, and the upper end drives the supporting wheel mounting seat to descend.

[0056] In this embodiment, the upper edge of the lifting arm 13 is provided with a gear, and the upper ends of the two groups of lifting arms are linked by gear meshing. Based on this gear form, the meshing linkage makes the upper ends of the two groups of lifting arms more stable, which has a better stabilizing effect on the supporting wheel mounting seat 21.

[0057] During operation, the feed belt supporting wheel 2 is rotatably mounted on the upper end of the lifting arm, and contacts the surface of the return feed belt in the working state, and contacts the return feed belt into an arc shape with lowered edges on both sides and higher in the middle; the feed belt supporting wheel is mounted on the supporting wheel mounting seat 21 using a wheel axle. Thus, when the bottom end of the lifting arm approaches the middle, the upper end drives the supporting wheel mounting seat to rise, and the feed belt supporting wheel can rise synchronously, contact the middle position of the return feed belt, and lift the middle to a certain arc, and when the bottom end of the lifting arm opens to both sides, the upper end drives the supporting wheel mounting seat to descend, and the feed belt supporting wheel can descend synchronously, and the middle position of the return feed belt also descends, and the bending degree of the return feed belt is also reduced accordingly.

[0058] The feed belt support wheel 2 is a ceramic wheel, a nylon PTFE wheel or a rubber wheel with a smooth surface, preferably a ceramic wheel. The feed belt support wheel 2 is a drum wheel with a raised center or a wave wheel with a grooved surface. Based on this structure, in addition to minimizing the adhesion of the material residue to itself, the static electricity generated by the friction between the support wheel and the feed belt can also be minimized.

[0059] In this embodiment, the feed belt supporting wheel 2 is a drum wheel with a central protrusion, and the material is ceramic.

[0060] The feed belt side wheel group 3 has two groups, which are respectively located on both sides of the return feed belt. The feed belt side wheel group includes a pressure wheel 31, a support wheel 32 and a correction wheel 33. The pressure wheel 31 and the support wheel 32 are arranged one above the other, and a gap is set between the two for the return feed belt to pass through. The correction wheel 33 is set between the pressure wheel and the support wheel, and contacts the two side edges of the return feed belt in the working state to prevent the return feed belt from running off. The feed belt side wheel group 3 is movably installed at both ends of the horizontal groove rail, restricted to reciprocating motion on the lead screw, and linked with the feed belt support wheel 2. That is, when the feeder belt supporting wheel rises and lifts the middle of the return feeder belt to a certain arc, the feeder belt side wheel group will move inward to keep the restrictions on the two side edges of the return feeder belt; and when the feeder belt supporting wheel descends and the curvature of the middle of the return feeder belt decreases, the return feeder belt will naturally flatten under the action of its flexibility, and the feeder belt side wheel group will move outward, and the feeder belt side wheel group will still keep the restrictions on the two side edges of the return feeder belt.

[0061] In more detail, in the present embodiment, the feed belt side wheel group also includes a movable base 34, an ear seat 35, and a mounting rod seat 36, the movable base is sleeved on the lead screw, is located in the horizontal groove rail, and is restricted to reciprocating motion on the lead screw, and the movable base is linked with the lifting and lowering of the feed belt supporting wheel; the ear seat is fixedly connected to the upper part of the movable base, and extends upward to the outside of the horizontal groove rail; the pressure wheel, the supporting wheel and the correcting wheel are all rotatably mounted on the mounting rod seat 36, wherein the correcting wheel is directly rotatably mounted on the mounting rod seat, the pressure wheel and the supporting wheel are arranged one above and one below, and the bottom end of the mounting rod seat is hinged to the ear seat.

[0062] In addition, a linkage structure is provided between the lead screw engagement seat and the movable base, and the linkage structure drives the movable base to move inward synchronously after the lead screw engagement seat moves inward for a certain distance. In this embodiment, the linkage structure includes a first claw 38 fixedly connected to the lead screw engagement seat and a second claw 39 fixedly connected to the movable base, and the first claw and the second claw are both L-shaped and are installed relative to each other. When the first claw moves a certain distance, it will conflict with the second claw, thereby driving the movable base to move inward synchronously. When the feed belt supporting wheel is at the lowest point, the relative movement distance between the first claw and the second claw is L1, and the width of the feed belt is L2, and L2 / L1=100 / (15-18).

[0063] During operation, when the feed belt supporting wheel is at the lowest point, it will naturally flatten under the flexible action of the feed belt, and the feed belt side wheel group will be pushed outward to the farthest limit distance. At this time, the first clamping claw is also at the farthest limit distance. When the screw engagement seat moves toward each other, the feed belt supporting wheel will rise, and at the same time, the first clamping claw will move inward, and after moving a certain distance, it will contact with the second clamping claw, driving the second clamping claw to move inward, that is, driving the movable base to move inward, so as to realize the inward movement of the feed belt side wheel group, without leaving the edge of the return feed belt, and still maintaining the restriction on the two side edges of the return feed belt.

[0064] In this embodiment, the ear seat is provided with a slope having an inclined angle with the horizontal groove rail, and the slope surface is inclined downward along the outward direction of the horizontal groove rail. A second notch 37 is opened on the upper part of the horizontal groove rail, and the ear seat extends to the outside of the horizontal groove rail through the second notch.

[0065] In this embodiment, a feeding belt with a width of 1 meter is used, and the relative moving distance between the first clamping claw and the second clamping claw is set to 16 cm, and the inclination angle of the slope is set to 17 degrees.

[0066] Example 2

[0067] like Figure 7As shown, the structure of this embodiment is basically the same as that of embodiment 1, except that: in this embodiment, the feed belt supporting wheel 2 adopts a wave wheel with a grooved surface and is made of ceramic. The width of the feed belt used is 1.5 meters, and the relative moving distance between the first clamping claw and the second clamping claw is set to 22.5 cm, and the inclination angle of the slope is set to 15 degrees.

[0068] The working process of the utility model is as follows:

[0069] When the feeding belt supporting wheel is at the lowest point, it will be naturally flattened under the flexible action of the feeding belt, and the feeding belt will push the feeding belt side wheel group outward to the farthest limit distance. At this time, the first clamping claw is also at the farthest limit distance.

[0070] When the rotating motor works, it drives the lead screw to rotate, and the two lead screw meshing seats move toward each other, driving the bottom end of the lifting arm to move closer to the middle, and the upper end drives the supporting wheel mounting seat to rise, and the feeding belt supporting wheel will rise, and the feeding belt supporting wheel can rise synchronously, touch the middle position of the return feeding belt, and lift the middle to a certain arc. At the same time, the first clamping claw will move inward, and after moving a certain distance, it will contact with the second clamping claw, driving the second clamping claw to move inward, that is, driving the movable base to move inward, so as to realize the inward movement of the feeding belt side wheel group, without leaving the edge of the return feeding belt, and still maintaining the restriction on the two side edges of the return feeding belt;

[0071] When the screw rotates in the opposite direction, the two screw engaging seats move back to back, the bottom end of the lifting arm opens to both sides, and the upper end drives the supporting wheel mounting seat to descend, and the feeding belt supporting wheel can descend synchronously, and the middle position of the return feeding belt also descends. Due to the flexibility of the feeding belt itself, the bending degree of the return feeding belt is also reduced accordingly until it is naturally flattened, pushing the second clamping claw to move outward, that is, driving the movable base to move outward, realizing the outward movement of the feeding belt side wheel group without leaving the edge of the return feeding belt, and still maintaining the restriction on the two side edges of the return feeding belt.

[0072] It should be understood that the purpose of these embodiments is only to illustrate the utility model and is not intended to limit the protection scope of the utility model. In addition, it should also be understood that after reading the technical content of the utility model, those skilled in the art can make various changes, modifications and / or variations to the utility model, and all of these equivalent forms also fall within the protection scope defined by the claims attached to this application.

Claims

1. A feeding belt return support mechanism, characterized in that: include: The support body comprises a horizontal groove rail, a lead screw and a lifting arm, wherein the lead screw is rotatably installed in the horizontal groove rail and meshes with the bottom end of the lifting arm for transmission, and the lead screw drives the lifting arm by rotation to realize the lifting of the upper end thereof; The feeder belt supporting wheel is rotatably mounted on the upper end of the lifting arm, and contacts the surface of the return feeder belt in the working state, so that the return feeder belt contacts the surface of the return feeder belt to form an arch shape with lower edges on both sides and a higher middle; And a feeder belt side wheel group, the feeder belt side wheel group is located on both sides of the return feeder belt, the feeder belt side wheel group includes a pressure wheel, a supporting wheel and a correction wheel, the pressure wheel and the supporting wheel are arranged one above the other, and a gap is arranged between the two for the return feeder belt to pass through, the correction wheel is arranged between the pressure wheel and the supporting wheel, and in a working state, it contacts the two side edges of the return feeder belt to prevent the return feeder belt from deviating.

2. A feeding belt return support mechanism as claimed in claim 1, characterized in that: Screw limit seats are arranged at both ends of the horizontal groove rail, and the screw is rotatably installed in the horizontal groove rail by means of the screw limit seats; the screw has a quick-connect port for an external rotation driving source.

3. A feeding belt return support mechanism as claimed in claim 1, characterized in that: The lifting arms are divided into two groups and are symmetrically arranged; the bottom ends of the lifting arms are respectively hinged with screw engagement seats by rotating shafts, and the upper ends are respectively hinged to the same supporting wheel mounting seat by rotating shafts; the feeding belt supporting wheel is mounted on the supporting wheel mounting seat by means of a wheel axle.

4. A feeding belt return support mechanism as claimed in claim 3, characterized in that: A first slot is formed at the lower portion of the horizontal groove rail, a hinge seat extending out of the first slot is formed at the lower portion of the lead screw engagement seat, and the bottom end of the lifting arm is connected to the hinge seat by a rotating shaft.

5. A feeding belt return support mechanism as claimed in claim 4, characterized in that: The lead screw is provided with two sections of threads in opposite directions, and the lead screw engagement seats of the two groups of lifting arms are respectively installed on the two sections of threads in opposite directions; the upper end edge of the lifting arm is provided in the form of a gear, and the upper ends of the two groups of lifting arms are linked by gear engagement.

6. A feeding belt return support mechanism as claimed in claim 1, characterized in that: The feeding belt supporting wheel adopts a ceramic wheel with a smooth surface; the feeding belt supporting wheel adopts a drum wheel with a raised middle or a wave wheel with a grooved tooth surface.

7. A feeding belt return support mechanism as claimed in claim 3, characterized in that: The feeding belt side wheel groups are movably mounted on both ends of the horizontal groove rail, restricted to reciprocate on the lead screw, and linked with the feeding belt supporting wheel; The feeding belt side wheel set also includes A movable base, which is sleeved on the lead screw, located in the horizontal groove rail, and restricted to reciprocate on the lead screw, and the movable base is linked with the lifting and lowering of the feed belt supporting wheel; An ear seat, the ear seat is fixed to the upper part of the movable base and extends upward to the outside of the horizontal groove rail; And a mounting rod seat, the pressure wheel, the supporting wheel and the correcting wheel are all rotatably mounted on the mounting rod seat, wherein the correcting wheel is directly rotatably mounted on the mounting rod seat, the pressure wheel and the supporting wheel are arranged one above and one below, and the bottom end of the mounting rod seat is hinged on the ear seat.

8. A feeding belt return support mechanism as claimed in claim 7, characterized in that: A linkage structure is provided between the lead screw engagement seat and the movable base, and after the lead screw engagement seat moves inwards for a certain distance, the linkage structure drives the movable base to move inwards synchronously; The linkage structure includes a first claw fixedly connected to the screw engagement seat and a second claw fixedly connected to the movable base. The first claw and the second claw are both L-shaped and installed relative to each other. When the first claw moves a certain distance, it will conflict with the second claw, thereby driving the movable base to move inward synchronously.

9. A feeding belt return support mechanism as claimed in claim 8, characterized in that: When the feeding belt supporting wheel is at the lowest point, the relative movement distance between the first clamping claw and the second clamping claw is L1, the width of the feeding belt is L2, and L2 / L1=100 / (15-16).

10. A feeding belt return support mechanism as claimed in claim 9, characterized in that: The ear seat is provided with a slope surface having an inclination angle with the horizontal groove rail, and the slope surface is inclined downward along the outward direction of the horizontal groove rail; the inclination angle of the slope surface is 15-17 degrees.

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