A multi-layer telescopic roller conveyor

Abstract

The present invention discloses a multi-layer telescopic roller conveyor, belonging to the field of roller conveyors, comprising a main telescopic frame and multiple support frames, wherein the main telescopic frame comprises multiple sets of first and second main support arms, the multiple sets of first and second main support arms forming a scissor-type telescopic structure, wherein the upper ends of the first and second main support arms are pivotally connected to upper conveying rollers, the middle portions of the first and second main support arms are pivotally connected to middle conveying rollers, and the lower ends of the first and second main support arms are pivotally connected to lower conveying rollers; the support frame comprises legs, the inner sides of which are connected to side frames. The upper, middle, and lower conveying rollers of the present invention form a three-layer cargo conveying channel, enabling classified conveying of at least three types of cargo using a single conveyor, reducing the space occupied by multiple conveyors and improving the efficiency of classified cargo conveying.

Description

Technical Field

[0001] The invention belongs to the field of roller conveyors, and in particular relates to a multi-layer telescopic roller conveyor. Background Art

[0002] In modern logistics, warehousing, manufacturing, and many other fields, the transportation of goods is crucial. Its efficiency and flexibility directly impact the smoothness and cost of the entire production or operation process. As a common conveying equipment, telescopic roller conveyors, with their scalable nature, can flexibly adapt to changes in space and conveying distances, making them widely used in many scenarios, including warehousing, logistics sorting, and production line material transportation.

[0003] However, existing telescopic roller conveyors on the market generally have structural limitations, with the vast majority adopting a single-layer design. This single-layer structure has gradually exposed numerous problems in the face of increasingly complex and diverse material conveying needs, seriously restricting conveying efficiency and cost control.

[0004] On the one hand, companies may choose to use multiple single-layer telescopic roller conveyors. Each conveyor is dedicated to transporting a specific type of item, thereby achieving classified transportation of items. First, from a cost perspective, purchasing multiple conveyors requires a significant investment, including equipment procurement costs, installation and commissioning costs, and subsequent maintenance costs. For some small and medium-sized enterprises, this is undoubtedly a heavy burden, significantly increasing their operating costs. Second, multiple conveyors require a large amount of site space. At a time when site resources are increasingly scarce, this will undoubtedly further increase the company's site pressure and limit its production layout and development space.

[0005] On the other hand, using a one-by-one conveying method, whereby all items of one type are conveyed before the next, while saving equipment costs and space, severely impacts conveying efficiency. In actual production or logistics operations, time is efficiency, and efficiency is competitiveness. This method of conveying items one by one results in significant waiting time during the conveying process, extending the entire production or logistics process. This method fails to meet the urgent demand for efficient, flexible, and cost-effective conveying equipment in modern industrial production and logistics operations. Summary of the Invention

[0006] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a multi-layer telescopic roller conveyor to solve the problems of low conveying efficiency, high cost and large space occupied by the existing telescopic roller conveyors, thereby improving the efficiency, flexibility and economy of cargo transportation.

[0007] In order to achieve the above object, the technical solution adopted by the present invention is:

[0008] A multi-layer telescopic roller conveyor, comprising:

[0009] The main telescopic frame includes multiple groups of first main support arms and second main support arms, the middle parts of the first main support arms and the second main support arms are pivotally connected, and the ends of multiple first main support arms and the second main support arms are pivotally connected in sequence. The multiple groups of first main support arms and the second main support arms form a scissors-type telescopic structure, the upper ends of the first main support arms and the second main support arms are rotatably connected to the upper conveying roller, the middle parts of the first main support arms and the second main support arms are rotatably connected to the middle conveying roller, and the lower ends of the first main support arms and the second main support arms are rotatably connected to the lower conveying roller; the upper conveying roller, the middle conveying roller and the lower conveying roller constitute a three-layer cargo conveying channel.

[0010] It also includes multiple support frames, which are arranged on both sides of the main telescopic frame and are used to support the main telescopic frame, including support legs, casters are provided at the lower part of the support legs, side frames are connected to the inner sides of the support legs, the upper conveying rollers on one side of the side frame are rotatably connected to the side frame, and a first guide groove is further provided on the side frame, and the end of the lower conveying roller on one side of the side frame is slidably installed in the first guide groove.

[0011] Furthermore, a sleeve is fixedly connected to one side of the side frame, and the support legs are installed in the interior of the sleeve with gaps. The support legs are provided with a number of equally spaced adjustment holes, and a pin is provided at the bottom of the sleeve for adjusting the height of the support legs.

[0012] Furthermore, a telescopic mechanism is provided at the lower part of the side frame at one end, and a slider is connected to the end of the telescopic rod of the telescopic mechanism, and the lower conveying roller is rotatably connected to the slider; when the telescopic mechanism is extended or retracted, the slider is driven to move up and down inside the side frame, thereby driving the lower conveying roller at the end to move up and down.

[0013] Furthermore, the telescopic mechanism adopts one of a pneumatic cylinder, a hydraulic cylinder or an electric cylinder.

[0014] Furthermore, it also includes a driving mechanism, which includes a motor installed on a support frame at one end, a reducer connected to one side of the motor, and an output shaft of the reducer is connected to the upper conveying roller at one end of the main telescopic frame. A transmission mechanism is provided on one side of the main telescopic frame, and the transmission mechanism includes a first upper pulley installed at one end of the upper conveying roller, a first middle pulley installed at one end of the middle conveying roller, and a first lower pulley installed at one end of the lower conveying roller. Multiple first upper pulleys, first middle pulleys and first lower pulleys on one side of the main telescopic frame are sequentially connected by a transmission belt.

[0015] Furthermore, one end of the upper conveying roller is fixedly connected to the second upper pulley, one end of the middle conveying roller is fixedly connected to the second middle pulley, and one end of the lower conveying roller is fixedly connected to the second lower pulley;

[0016] Auxiliary telescopic frames are provided on both sides of the upper conveying roller, the middle conveying roller and the lower conveying roller, and the auxiliary telescopic frames include a first auxiliary support arm and a second auxiliary support arm, the middle part of the first auxiliary support arm is pivotally connected to the first main support arm, and the middle part of the second auxiliary support arm is pivotally connected to the second main support arm, and the first main support arm, the second main support arm, the first auxiliary support arm and the second auxiliary support arm form a scissor-type telescopic structure;

[0017] The middle part of the first secondary supporting arm or the second secondary supporting arm is rotatably connected to the first transition pulley, the first transition pulley is connected to the second upper pulley or the second middle pulley or the second lower pulley through the first belt; one end of the first secondary supporting arm and the second secondary supporting arm are pivotally connected, and the pivot joint is rotatably connected to the second transition pulley, and the second transition pulley is connected to the first transition pulley through the second belt; the other end of the first secondary supporting arm is rotatably connected to the first auxiliary conveying roller, one end of the first auxiliary conveying roller is fixedly connected to the first auxiliary pulley, and the first auxiliary pulley is connected to the second transition pulley through the third belt; the other end of the second secondary supporting arm is rotatably connected to the second auxiliary conveying roller, one end of the second auxiliary conveying roller is fixedly connected to the second auxiliary pulley, and the second auxiliary pulley is connected to the second transition pulley through the fourth belt.

[0018] Furthermore, limit plates are provided on both sides of the upper part of the main telescopic frame, which are used to limit the conveying trajectory of goods on the upper conveying channel; a second guide groove is provided on the limit plate, and the two ends of the upper conveying roller are rotatably connected to the limit plate, and the pivot joint of the first auxiliary support arm and the second auxiliary support arm is slidably installed in the second guide groove, and the upper end of the limit plate is rotatably connected to a guide wheel.

[0019] Furthermore, it also includes a material guiding mechanism, which is arranged at the feed end of the conveyor and / or the discharge end of the conveyor, and is used to dock with the feed platform and / or the discharge platform. The material guiding mechanism includes a support plate, and U-shaped buckle plates are provided on both sides of the support plate. The U-shaped buckle plates are buckled on the outside of the support frame, and one side of the U-shaped buckle plate is threadedly connected with a fastening bolt, and the end of the fastening bolt is against the side wall of the support frame; a slide is provided on the upper part of the support plate, and the slide is docked with the feed platform and / or the discharge platform.

[0020] Furthermore, a plurality of material guide rollers are rotatably connected inside the slide.

[0021] Furthermore, a through hole is provided on the support plate, the lower part of one end of the slide is fixedly connected to the rotating shaft, the rotating shaft and the through hole are gap-matched, and the lower part of the rotating shaft is threadedly connected to a limiting retaining ring; material baffles are provided on both sides of the support plate, and a movable gap is provided between the material baffles and the slide.

[0022] The beneficial effects of the present invention are:

[0023] 1) The upper conveyor rollers, middle conveyor rollers, and lower conveyor rollers of the present invention form a three-layer cargo conveying channel, which uses one conveyor to realize the classified conveyance of at least three types of cargo, reduces the space occupied by multiple conveyors, and improves the efficiency of classified cargo conveyance.

[0024] 2) By adjusting the height of the legs, not only can the height of the conveyor be matched with different platforms, but it can also flexibly cross obstacles such as ground protrusions, small equipment, and temporarily stacked goods, ensuring the continuity and stability of cargo transportation.

[0025] 3) A telescopic mechanism is set at the lower part of the side frame at one end. When the telescopic mechanism is extended or retracted, it drives the slider to move up and down inside the side frame, thereby driving the lower conveyor roller at the end to move up and down, realizing the automatic extension and retraction of the conveyor and ensuring the stability of the conveyor after extension and retraction.

[0026] 4) By setting up the driving mechanism and transmission mechanism, the rotation of each conveyor roller is realized, which facilitates the long-distance, heavy-load and high-frequency transportation of goods.

[0027] 5) A limit plate is set on the upper part of the main telescopic frame to limit the cargo conveying trajectory on the upper conveying channel and prevent cargo from falling.

[0028] 6) By setting up a secondary telescopic frame and linking the secondary telescopic frame with the main telescopic frame, the first and second auxiliary conveyor rollers are used to fill the gaps between the upper, middle and lower conveyor rollers after stretching, effectively preventing goods from getting stuck between the conveyor rollers or falling through the gaps between the conveyor rollers during transportation, thereby improving the safety and reliability of cargo transportation.

[0029] 7) By setting up a rotatable material guide mechanism, it is convenient to connect the import and export of goods from different positions. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of a multi-layer telescopic roller conveyor of the present invention.

[0031] Figure 2 It is a schematic diagram of the connection between the main telescopic frame and the support frame.

[0032] Figure 3 It is a partial schematic diagram of the main transmission mechanism.

[0033] Figure 4 It is a partial schematic diagram of this auxiliary transmission mechanism.

[0034] Figure 5 It is a transmission diagram of the upper conveyor roller, the first auxiliary conveyor roller and the second auxiliary conveyor roller.

[0035] Figure 6 Schematic diagram of the support frame.

[0036] Figure 7 It is a schematic diagram of the limit plate.

[0037] Figure 8 It is a schematic diagram of the telescopic mechanism.

[0038] Figure 9 This is an exploded view of the material guide mechanism.

[0039] In the figure, 1. Main telescopic frame; 101. First main support arm; 102. Second main support arm; 103. Upper conveyor roller; 104. Middle conveyor roller; 105. Lower conveyor roller; 106. First upper pulley; 107. First middle pulley; 108. First lower pulley; 109. Second upper pulley; 110. Second middle pulley; 111. Second lower pulley; 2. Support frame; 201. Support leg; 202. Adjustment hole; 203. Caster; 204. Sleeve; 205. Side frame; 206. First guide groove; 207. Telescopic mechanism; 208. Telescopic rod ; 209, slider; 3, auxiliary telescopic frame; 301, first auxiliary support arm; 302, second auxiliary support arm; 303, first auxiliary conveying roller; 304, second auxiliary conveying roller; 305, first auxiliary pulley; 306, second auxiliary pulley; 307, first transition wheel; 308, second transition wheel; 4, motor; 5, reducer; 6, limit plate; 601, second guide groove; 602, guide wheel; 7, material guiding mechanism; 701, slide; 702, material guiding roller; 703, rotating shaft; 704, support plate; 705, material blocking plate; 706, U-shaped buckle plate; 707, fastening bolts. DETAILED DESCRIPTION

[0040] The following will be combined with the Figures 1-9 The technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0041] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0042] like Figure 1 、 Figure 2As shown, a multi-layer telescopic roller conveyor includes a main telescopic frame 1 and multiple support frames 2. Figure 3 As shown, the main telescopic frame 1 includes multiple groups of first main support arms 101 and second main support arms 102, the middle parts of the first main support arms 101 and the second main support arms 102 are pivotally connected, and the ends of the multiple first main support arms 101 and the second main support arms 102 are pivotally connected in sequence, and the multiple groups of first main support arms 101 and the second main support arms 102 form a scissor-type telescopic structure, as shown in FIG. Figure 2 As shown, the upper ends of the first main support arm 101 and the second main support arm 102 are rotatably connected to the upper conveying roller 103 at the pivot joint, the middle parts of the first main support arm 101 and the second main support arm 102 are rotatably connected to the middle conveying roller 104, and the lower ends of the first main support arm 101 and the second main support arm 102 are rotatably connected to the lower conveying roller 105 at the pivot joint; the upper conveying roller 103, the middle conveying roller 104 and the lower conveying roller 105 constitute a three-layer cargo conveying channel, which uses one conveyor to realize the classified conveying of at least three types of cargo, reduces the space occupied by multiple conveyors, and improves the efficiency of classified conveying of cargo.

[0043] The support frame 2 is arranged on both sides of the main telescopic frame 1 to support the main telescopic frame 1. Figure 6 As shown, it includes a support leg 201, and a caster 203 is provided at the lower part of the support leg 201 for moving the conveyor. The inner side of the support leg 201 is connected to the side frame 205, and the upper conveying roller 103 on one side of the side frame 205 is rotatably connected to the side frame 205. The side frame 205 is also provided with a first guide groove 206, and the end of the lower conveying roller 105 on one side of the side frame 205 is slidably installed in the first guide groove 206.

[0044] like Figure 6 As shown, a sleeve 204 is fixedly connected to one side of the side frame 205, and the support leg 201 is installed in the interior of the sleeve 204 with a gap. A plurality of equally spaced adjustment holes 202 are provided on the support leg 201, and a pin is provided at the bottom of the sleeve 204 for adjusting the height of the support leg 201.

[0045] In actual applications, the heights of the platforms involved in cargo transportation often vary, such as shelf platforms in different warehouses and operating platforms on different production lines. This technical solution, by providing a number of equally spaced adjustment holes 202 on the legs 201 and utilizing a pin at the bottom of the sleeve 204 for height adjustment, allows the conveyor to be easily and accurately adjusted to match platforms of varying heights, thereby improving the conveyor's versatility.

[0046] In addition, by adjusting the height of the legs 201, the conveyor can flexibly cross obstacles such as ground protrusions, small equipment, and temporarily stacked goods, ensuring the continuity and stability of cargo transportation.

[0047] like Figure 6 As shown, a telescopic mechanism 207 is provided at the lower part of the side frame 205 at one end, and a slider 209 is connected to the end of the telescopic rod 208 of the telescopic mechanism 207, and the lower conveying roller 105 is rotatably connected to the slider 209; when the telescopic mechanism 207 is extended or retracted, the slider 209 is driven to move up and down inside the side frame 205, thereby driving the lower conveying roller 105 at the end to move up and down, realizing automatic extension and retraction of the conveyor, and ensuring the stability of the conveyor after extension and retraction.

[0048] The telescopic mechanism 207 is a pneumatic cylinder, a hydraulic cylinder or an electric cylinder. In this embodiment, Figure 8 As shown, the telescopic mechanism 207 adopts an electric cylinder.

[0049] Unpowered roller conveyors are suitable for short-distance, light-load, low-frequency cargo transportation, such as material handling in warehouses and workshops; while powered roller conveyors are suitable for long-distance, heavy-load, high-frequency material transportation, such as material flow on production lines and cargo sorting in logistics centers. In order to achieve powered transportation of cargo, the present invention also includes a driving mechanism, such as Figure 2 As shown, the driving mechanism includes a motor 4 mounted on a support frame 2 at one end, a reducer 5 is connected to one side of the motor 4, and the output shaft of the reducer 5 is connected to the upper conveying roller 103 at one end of the main telescopic frame 1. A transmission mechanism is provided on one side of the main telescopic frame 1, as shown in FIG. Figure 3 As shown, the transmission mechanism includes a first upper pulley 106 installed at one end of the upper conveying roller 103, a first middle pulley 107 installed at one end of the middle conveying roller 104, and a first lower pulley 108 installed at one end of the lower conveying roller 105. The multiple first upper pulleys 106, first middle pulleys 107 and first lower pulleys 108 on one side of the main telescopic frame 1 are connected in sequence through a transmission belt; the motor 4 and the reducer 5 in the drive mechanism use the transmission mechanism to drive the upper conveying roller 103, the middle conveying roller 104 and the lower conveying roller 105 on the main telescopic frame 1 to rotate, thereby realizing long-distance, heavy-load and high-frequency transportation of goods.

[0050] like Figure 4 、 Figure 5 As shown, one end of the upper conveying roller 103 is fixedly connected to the second upper pulley 109, one end of the middle conveying roller 104 is fixedly connected to the second middle pulley 110, and one end of the lower conveying roller 105 is fixedly connected to the second lower pulley 111;

[0051] Auxiliary telescopic frames 3 are provided on both sides of the upper conveying roller 103, the middle conveying roller 104 and the lower conveying roller 105. The auxiliary telescopic frames 3 include a first auxiliary support arm 301 and a second auxiliary support arm. The middle part of the first auxiliary support arm 301 is pivotally connected to the first main support arm 101, and the middle part of the second auxiliary support arm 302 is pivotally connected to the second main support arm 102. The first main support arm 101, the second main support arm 102, the first auxiliary support arm 301 and the second auxiliary support arm 302 form a scissor-type telescopic structure.

[0052] The middle part of the first auxiliary supporting arm 301 or the second auxiliary supporting arm 302 is rotatably connected to the first transition pulley 307, and the first transition pulley 307 is connected to the second upper pulley 109 or the second middle pulley 110 or the second lower pulley 111 through a first belt; one end of the first auxiliary supporting arm 301 and the second auxiliary supporting arm 302 are pivotally connected, and the pivot joint is rotatably connected to the second transition pulley 308, and the second transition pulley 308 is connected to the first transition pulley 307 through a second belt; the other end of the first auxiliary supporting arm 301 is rotatably connected to the first auxiliary conveying roller 303, one end of the first auxiliary conveying roller 303 is fixedly connected to the first auxiliary pulley 305, and the first auxiliary pulley 305 is connected to the second transition pulley 308 through a third belt; the other end of the second auxiliary supporting arm 302 is rotatably connected to the second auxiliary conveying roller 304, one end of the second auxiliary conveying roller 304 is fixedly connected to the second auxiliary pulley 306, and the second auxiliary pulley 306 is connected to the second transition pulley 308 through a fourth belt.

[0053] When the main telescopic frame 1 is extended or retracted, it drives the auxiliary telescopic frame 3 to extend or retract synchronously, thereby driving the first auxiliary conveyor roller 303 and the second auxiliary conveyor roller 304 to extend or retract synchronously, filling the gaps between the adjacent upper conveyor rollers 103, middle conveyor rollers 104 and lower conveyor rollers 105, effectively preventing the goods from getting stuck between the conveyor rollers or falling through the gaps between the conveyor rollers during transportation. For example, when transporting small items, the auxiliary telescopic frame 3 can ensure that the goods pass through the conveyor steadily and smoothly, reducing the risk of damage and loss of the goods, and greatly improving the safety and reliability of cargo transportation.

[0054] like Figure 4 、 Figure 7 As shown, limit plates 6 are provided on both sides of the upper part of the main telescopic frame 1, which are used to limit the conveying trajectory of the goods on the upper conveying channel to prevent the goods from falling; a second guide groove 601 is provided on the limit plate 6, and both ends of the upper conveying roller 103 are rotatably connected to the limit plate 6, and the pivot joint of the first auxiliary support arm 301 and the second auxiliary support arm 302 is slidably installed in the second guide groove 601, and the upper end of the limit plate 6 is rotatably connected to the guide wheel 602, which reduces the friction between the goods and the limit plate 6 and ensures the stability and smoothness of the goods during transportation.

[0055] like Figure 1 、 Figure 9As shown, it also includes a material guiding mechanism 7, which is arranged at the feed end and / or the discharge end of the conveyor, and is used to dock with the feed platform and / or the discharge platform. The material guiding mechanism 7 includes a support plate 704, and U-shaped buckle plates 706 are provided on both sides of the support plate 704. The U-shaped buckle plates 706 are buckled on the outside of the support frame 2, and a fastening bolt 707 is threadedly connected to one side of the U-shaped buckle plate 706. The end of the fastening bolt 707 is abutted against the side wall of the support frame 2 to achieve position adjustment and fixation of the material guiding mechanism 7 and the support frame 2; a slide plate 701 is provided on the upper part of the support plate 704, and the slide plate 701 is docked with the feed platform and / or the discharge platform.

[0056] like Figure 9 As shown, a plurality of guide rollers 702 are rotatably connected inside the slide 701, which reduces the friction of the goods inside the slide 701 and improves the smoothness of the goods entering and exiting the conveyor.

[0057] like Figure 9 As shown, a through hole is provided on the support plate 704, and the lower part of one end of the slide 701 is fixedly connected to the rotating shaft 703, and the rotating shaft 703 is loosely matched with the through hole. The lower part of the rotating shaft 703 is threadedly connected to a limiting retaining ring to prevent the rotating shaft 703 from separating from the support plate 704. The rotating shaft 703 makes the angle between the slide 701 and the support plate 704 adjustable, which is convenient for transporting goods at different positions, reduces the frequency of position adjustment of the conveyor, and improves the flexibility of the conveyor; baffles 705 are provided on both sides of the support plate 704 to prevent the goods from falling from the support plate 704 after the position between the slide 701 and the support plate 704 is adjusted. A movable gap is provided between the baffle plate 705 and the slide 701, which can not only meet the needs of angle adjustment of the slide 701, but also limit the angle of adjustment of the slide 701.

[0058] The above content is merely an example and explanation of the structure of the present invention. Those skilled in the art may make various modifications or additions to the described specific embodiments or replace them in a similar manner. As long as they do not deviate from the scope defined by the structure of the invention, they should all fall within the scope of protection of the present invention.

Claims

1. A multi-layer telescopic roller conveyor, comprising: The main telescopic frame comprises a plurality of groups of first main support arms and second main support arms, the middle parts of the first main support arms and the second main support arms are pivotally connected, the ends of the plurality of first main support arms and the second main support arms are pivotally connected in sequence, and the plurality of groups of first main support arms and the second main support arms form a scissor-type telescopic structure, characterized in that the upper ends of the first main support arms and the second main support arms are rotatably connected to the upper conveying roller at the pivotal joint, the middle ends of the first main support arms and the second main support arms are rotatably connected to the middle conveying roller, and the lower ends of the first main support arms and the second main support arms are rotatably connected to the lower conveying roller; the upper conveying roller, the middle conveying roller and the lower conveying roller form a three-layer cargo conveying channel; It also includes a plurality of support frames, which are arranged on both sides of the main telescopic frame and are used to support the main telescopic frame, including support legs, casters are provided at the lower parts of the support legs, side frames are connected to the inner sides of the support legs, upper conveying rollers on one side of the side frames are rotatably connected to the side frames, and first guide grooves are further provided on the side frames, and ends of the lower conveying rollers on one side of the side frames are slidably installed in the first guide grooves; The transmission mechanism further comprises a motor mounted on a support frame at one end, a reducer connected to one side of the motor, an output shaft of the reducer connected to an upper conveying roller at one end of the main telescopic frame, a transmission mechanism being provided on one side of the main telescopic frame, the transmission mechanism comprising a first upper pulley mounted on one end of the upper conveying roller, a first middle pulley mounted on one end of the middle conveying roller, and a first lower pulley mounted on one end of the lower conveying roller, a plurality of first upper pulleys, first middle pulleys and first lower pulleys on one side of the main telescopic frame being sequentially connected by a transmission belt; One end of the upper conveying roller is fixedly connected to the second upper belt pulley, one end of the middle conveying roller is fixedly connected to the second middle belt pulley, and one end of the lower conveying roller is fixedly connected to the second lower belt pulley; Auxiliary telescopic frames are provided on both sides of the upper conveying roller, the middle conveying roller and the lower conveying roller, and the auxiliary telescopic frames include a first auxiliary support arm and a second auxiliary support arm, the middle part of the first auxiliary support arm is pivotally connected to the first main support arm, and the middle part of the second auxiliary support arm is pivotally connected to the second main support arm, and the first main support arm, the second main support arm, the first auxiliary support arm and the second auxiliary support arm form a scissor-type telescopic structure; The middle part of the first auxiliary supporting arm or the second auxiliary supporting arm is rotatably connected to the first transition wheel, the first transition wheel is connected to the second upper pulley or the second middle pulley or the second lower pulley through the first belt; one end of the first auxiliary supporting arm and the second auxiliary arm are pivotally connected, and the pivot joint is rotatably connected to the second transition wheel through the second belt; the other end of the first auxiliary supporting arm is rotatably connected to the first auxiliary conveying roller, one end of the first auxiliary conveying roller is fixedly connected to the first auxiliary pulley, and the first auxiliary pulley is connected to the second transition pulley through the third belt; the other end of the second auxiliary supporting arm is rotatably connected to the second auxiliary conveying roller, one end of the second auxiliary conveying roller is fixedly connected to the second auxiliary pulley, and the second auxiliary pulley is connected to the second transition pulley through the fourth belt; It also includes a material guiding mechanism, which is arranged at the feed end of the conveyor and / or the discharge end of the conveyor and is used to dock with the feed platform and / or the discharge platform. The material guiding mechanism includes a support plate, and U-shaped buckle plates are provided on both sides of the support plate. The U-shaped buckle plates are buckled on the outside of the support frame, and a fastening bolt is threadedly connected to one side of the U-shaped buckle plate, and the end of the fastening bolt is abutted against the side wall of the support frame; a slide is provided on the upper part of the support plate, and the slide is docked with the feed platform and / or the discharge platform.

2. A multi-layer telescopic roller conveyor according to claim 1, characterized in that: A sleeve is fixedly connected to one side of the side frame, and the support legs are installed in the interior of the sleeve with gaps. The support legs are provided with a number of equally spaced adjustment holes, and a pin is provided at the bottom of the sleeve for adjusting the height of the support legs.

3. The multi-layer telescopic roller conveyor according to claim 1, characterized in that: A telescopic mechanism is provided at the lower part of the side frame at one end, and a slider is connected to the end of the telescopic rod of the telescopic mechanism, and the lower conveying roller is rotatably connected to the slider; when the telescopic mechanism is extended or retracted, the slider is driven to move up and down inside the side frame, thereby driving the lower conveying roller at the end to move up and down.

4. The multi-layer telescopic roller conveyor according to claim 3, characterized in that: The telescopic mechanism adopts one of an air cylinder, a hydraulic cylinder or an electric cylinder.

5. The multi-layer telescopic roller conveyor according to claim 1, characterized in that: Limit plates are provided on both sides of the upper part of the main telescopic frame, which are used to limit the conveying trajectory of the goods on the upper conveying channel; a second guide groove is provided on the limit plate, and the two ends of the upper conveying roller are rotatably connected to the limit plate, and the pivotal joint of the first auxiliary support arm and the second auxiliary support arm is slidably installed in the second guide groove, and the upper end of the limit plate is rotatably connected to the guide wheel.

6. The multi-layer telescopic roller conveyor according to claim 1, characterized in that: A plurality of material guide rollers are rotatably connected inside the slide.

7. The multi-layer telescopic roller conveyor according to claim 6, characterized in that: A through hole is provided on the support plate, and the lower part of one end of the slide is fixedly connected to the rotating shaft, the rotating shaft and the through hole are gap-matched, and the lower part of the rotating shaft is threadedly connected to a limiting retaining ring; baffles are provided on both sides of the support plate, and a movable gap is provided between the baffles and the slide.

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