Wide telescopic conveyor

Abstract

The present invention discloses a wide telescopic conveyor, comprising a fixed section, a telescopic section, a telescopic drive mechanism, and a conveying mechanism; the telescopic section comprises a main telescopic section and at least two secondary telescopic sections which are nested and connected in sequence, and one end of the main telescopic section away from the secondary telescopic section is nested on the fixed section; the telescopic drive mechanism comprises a first drive component and a second drive component which can operate independently, the first drive component is used to drive the telescopic movement of the main telescopic section relative to the fixed section, and the second drive component is used to drive the synchronous telescopic movement of all the secondary telescopic sections relative to the main telescopic section. In the process of extending or retracting the telescopic section, the first drive component can operate before the second drive component, so that after the main telescopic section is fully extended or retracted, the secondary telescopic section can perform synchronous telescopic movement. The present invention can effectively improve the stability of the equipment during the telescopic process.

Description

Technical Field

[0001] The invention relates to the technical field of logistics and transportation, and in particular to a wide telescopic conveyor. Background Art

[0002] In the process of cargo handling and transportation, great flexibility is required, and the handling and transportation time must be short and the efficiency must be high. Therefore, telescopic conveyors (referred to as telescopic conveyors) came into being. By adding a telescopic mechanism to an ordinary conveyor, the conveyor can be freely extended and retracted in the length direction, thereby meeting various handling needs.

[0003] At present, the width of telescopic conveyors (mostly 600mm or 800mm) is relatively narrow, and can only transport small items. In order to transport large items, industry insiders have begun to devote themselves to the research and development of wide-width telescopic conveyors. However, as the width increases, the overall structure of the equipment becomes heavier, and the difficulty of supporting it during the telescopic process increases, making it difficult to perform the telescopic action smoothly. Summary of the invention

[0004] In order to overcome the above-mentioned shortcomings, the object of the present invention is to provide a wide telescopic conveyor which can effectively improve the stability of the equipment during the telescopic process.

[0005] In order to achieve the above purpose, the technical solution adopted by the present invention is: a wide telescopic conveyor, comprising

[0006] Fixed segment;

[0007] The telescopic section comprises a main telescopic section and at least two secondary telescopic sections which are nested in sequence, wherein one end of the main telescopic section away from the secondary telescopic section is nested in the fixed section;

[0008] The telescopic drive mechanism comprises a first drive assembly and a second drive assembly which can operate independently, wherein the first drive assembly is used to drive the telescopic movement of the main telescopic section relative to the fixed section, and the second drive assembly is used to drive the synchronous telescopic movement of all the secondary telescopic sections relative to the main telescopic section;

[0009] The conveying mechanism comprises a driving roller and a plurality of reversing rollers, wherein the driving roller can rotate under the action of a roller driving member, and a conveying belt in a closed loop structure is wound around the plurality of reversing rollers and the driving roller;

[0010] During the extension or retraction of the telescopic section, the first drive assembly can operate before the second drive assembly, so that after the main telescopic section is fully extended or retracted, the secondary telescopic section can perform synchronous telescopic movement.

[0011] The beneficial effects of the wide telescopic conveyor of the present invention are:

[0012] In the telescopic drive mechanism, the telescopic movement of the telescopic section is divided into two sections through the cooperation of the first drive component and the second drive component, thereby reducing the driving force required to be provided by a single drive component; wherein, the first section is the telescopic movement of the main telescopic section driven by the first drive component, at this time, all the secondary telescopic sections remain stationary relative to the main telescopic section, and the fixed section only needs to provide the supporting force required for the telescopic movement of the main telescopic section, thereby ensuring the telescopic stability of the main telescopic section to a certain extent; the second section is after the main telescopic section is fully extended or retracted, the second drive component drives all the secondary telescopic sections to perform synchronous telescopic movement, at this time, the main telescopic section remains stationary relative to the fixed section, therefore, the main telescopic section and the fixed section as a whole (equivalent to increasing the weight of the fixed section) jointly provide the supporting force required for the telescopic movement of all the secondary telescopic sections, thereby improving the telescopic stability of the secondary telescopic sections. The improvement of the telescopic drive mechanism can effectively improve the telescopic stability of the telescopic section, thereby improving the working stability of the wide-width telescopic conveyor.

[0013] Further, the second drive assembly includes a second drive member and a telescopic transmission part; the telescopic transmission part is arranged in a one-to-one correspondence with the secondary telescopic section, and is used to drive the corresponding secondary telescopic section to telescopically move relative to the adjacent previous secondary telescopic section or the main telescopic section; wherein the telescopic transmission part corresponding to the secondary telescopic section closest to the main telescopic section is the secondary section main transmission part, and the remaining telescopic transmission parts are all secondary section slave transmission parts;

[0014] The secondary section main transmission part comprises a secondary section main front sprocket, a secondary section main rear sprocket and a secondary section main chain. The secondary section main front sprocket and the secondary section main rear sprocket are respectively arranged at the front and rear ends of the main telescopic section. The secondary section main chain is arranged on the secondary section main front sprocket and the secondary section main rear sprocket in a closed loop, and the secondary section main chain is fixedly connected to the secondary telescopic section closest to the main telescopic section.

[0015] The secondary section slave transmission part includes a secondary section slave front sprocket, a secondary section slave rear sprocket, a secondary section extension chain, and a secondary section retraction chain. The secondary section slave front sprocket and the secondary section slave rear sprocket are arranged at the front and rear ends of the upper main telescopic section or the secondary telescopic section of the corresponding secondary telescopic section; one end of the secondary section extension chain is fixedly connected to the corresponding secondary telescopic section, and the other end is fixedly connected to the rear end of the upper two main telescopic sections or the secondary telescopic section of the corresponding secondary telescopic section after bypassing the secondary section slave front sprocket; one end of the secondary section retraction chain is fixedly connected to the corresponding secondary telescopic section, and the other end is fixedly connected to the front end of the upper two main telescopic sections or the secondary telescopic section of the corresponding secondary telescopic section after bypassing the secondary section slave rear sprocket;

[0016] The second driving member is installed at the rear end of the main telescopic section to drive the main rear sprocket of the secondary section to rotate.

[0017] It should be noted that the fixed section, the main telescopic section, and the secondary telescopic section are regarded as a whole that is nested and connected one by one. The "upper section" refers to a section located at the rear end of itself and adjacent to itself (it can be a fixed section, a main telescopic section, or a secondary telescopic section), and the "upper two sections" refers to a section located at the rear end of itself and separated by a telescopic section. For example, if there are two secondary telescopic sections, the one close to the main telescopic section is secondary telescopic section 1, and the one far away from the main telescopic section is secondary telescopic section 2. For secondary telescopic section 1, the main telescopic section is its upper section, and the fixed section is its upper two sections; for secondary telescopic section 2, secondary telescopic section 1 is its upper section, and the main telescopic section is its upper two sections.

[0018] In the second drive assembly, the second drive member is connected to the main transmission part of the secondary section to drive the telescopic movement of the secondary telescopic section closest to the main telescopic section (i.e., the secondary telescopic section nested in the main telescopic section); the telescopic movement of the previous secondary telescopic section is transmitted to the corresponding secondary telescopic section through the secondary transmission part to drive the telescopic movement of the corresponding secondary telescopic section.

[0019] Specifically, taking two secondary telescopic sections as an example, the one adjacent to the main telescopic section is set as secondary telescopic section one, and the other is set as secondary telescopic section two. For secondary telescopic section two, the upper section is secondary telescopic section one, and the upper two sections are main telescopic sections. When extending, the second driving member drives the secondary section main rear sprocket to rotate, and the secondary section main chain is then driven, and secondary telescopic section one (in the direction away from the main telescopic section) is extended. At this time, the secondary section from the front sprocket and the secondary section from the rear sprocket on the secondary telescopic section one move forward synchronously; the secondary section from the front sprocket immediately pushes the secondary section extension chain transmission, because the main telescopic section remains stationary, the secondary section extension chain can only drive the secondary telescopic section two (in the direction away from the secondary telescopic section one) to extend; similarly, when retracting, because the secondary section from the front sprocket and the secondary section from the rear sprocket move backward synchronously; the secondary section from the rear sprocket immediately pushes the secondary section retraction chain transmission, and the secondary section retraction chain immediately drives the secondary telescopic section two (in the direction close to the telescopic section one) to retract.

[0020] Further, the second driving member includes a second driving motor, a second main driving wheel, a second secondary driving wheel, a second driving roller shaft, and a second driving chain. The second driving roller shaft is arranged on the main telescopic section along the width direction of the telescopic section; a second driving chain in a closed loop is wound around the second main driving wheel and the second secondary driving wheel. The second driving motor is coaxially connected to the second main driving wheel, and the second secondary driving wheel and the secondary main rear sprocket are coaxially mounted on the second driving roller shaft. The arrangement of the second main driving wheel, the second secondary driving wheel, and the second driving chain improves the stability of driving the secondary main rear sprocket.

[0021] Furthermore, the second driving member also includes a chain tensioning part, which includes a tensioning fixing plate and tensioning plates symmetrically arranged on both sides of the second main driving wheel; the tensioning fixing plate is fixedly installed on the main telescopic joint, the tensioning plate abuts against the second driving chain, one end of which is rotatably set on the tensioning fixing plate, and the other end is connected to the other tensioning plate through a tension spring; when the second driving chain is transmitted, the tension spring is in a stretched state.

[0022] The second drive chain can be tensioned by the arrangement of the chain tensioning portion, and both sides of the second drive chain can be tensioned by the arrangement of the two tensioning plates, so that the second drive chain can be tensioned during clockwise or counterclockwise transmission.

[0023] Further, the first drive assembly includes a first drive member, a main section front sprocket, a main section rear sprocket, and a main section chain. The main section front sprocket and the main section rear sprocket are arranged at the front and rear ends of the fixed section respectively. The main section chain is arranged on the main section front sprocket and the main section rear sprocket in a closed loop, and the main section chain is connected to the main telescopic section; the first drive member is connected to the main section rear sprocket to drive the main section rear sprocket to rotate. The driving principle of the first drive assembly is roughly the same as the principle of the second drive member driving the secondary section main transmission part.

[0024] Specifically, the driving roller is arranged at the rear end of the fixed section; a plurality of reversing rollers are arranged at the front and rear ends of the fixed section, the front and rear ends of the main telescopic section, and the front and rear ends of each secondary telescopic section; the reversing rollers at the front and rear ends of the fixed section are arranged on the same horizontal plane, and the reversing rollers at the front and rear ends of the main telescopic section or the secondary telescopic section are arranged on different horizontal planes; when the telescopic section is in a retracted state, the conveyor belt is arranged in a serpentine shape on a plurality of reversing rollers.

[0025] When the telescopic section is extended by the telescopic drive mechanism, the reversing rollers on the main telescopic section and the secondary telescopic section can move to the specified position. At this time, the serpentine conveyor belt can be unfolded to adapt to the extension length of the telescopic section. When the telescopic section is extended to the right position, the conveyor belt can be transmitted on the driving roller and several reversing rollers through the rotation of the driving roller, so as to transport the goods on the conveyor belt.

[0026] Further, the reversing roller includes a cylinder body and a support assembly. The cylinder body is provided with a cavity which passes through the left and right sides. The support assembly includes two groups of support parts which are respectively located at the two ends of the cavity. Each group of support parts includes a roller shaft and at least two support bearings. The roller shaft is coaxially arranged with the cylinder body, one end of which is located in the cavity and the other end extends out of the cavity. At least two support bearings are spaced apart and mounted on the roller shaft located in the cavity, and a gap is left between the roller shafts of the two groups of support parts.

[0027] As the width of the wide telescopic conveyor increases, the length of the reversing roller will increase accordingly. As its length increases, its weight will inevitably increase. In the wide telescopic conveyor, there are many reversing rollers, which invisibly increases the weight of the wide telescopic conveyor. Therefore, the two sets of support parts are used to ensure stable support for the cylinder; the coaxial setting of the roller shafts of the two sets of support parts and the cylinder ensures that the two roller shafts are on the same axis, thereby ensuring the stability of the rotation axis of the cylinder; and at least two support bearings are arranged at intervals on each roller shaft, and at least four support bearings are arranged at intervals on the two roller shafts, which can enhance the support effect on the cylinder and thereby improve the stability of the rotation of the cylinder; and the gap left between the two sets of support parts can reduce the weight of the reversing roller to a certain extent.

[0028] Further, the cavity includes a middle cavity and end cavities located at both ends of the middle cavity, and the end cavities are used to accommodate the support part; the inner diameter of the middle cavity is smaller than the inner diameter of the end cavity, so that a limiting step for the support part to abut can be formed at the junction of the middle cavity and the end cavity;

[0029] The roller shaft includes a middle section shaft rod and an end section shaft rod which are coaxially arranged and integrally formed. Two end section shaft rods are provided and are respectively located at the two ends of the middle section shaft rod; the outer diameter of the middle section shaft rod is larger than the outer diameter of the end section shaft rod; two support bearings are provided and are mounted one by one on the end section shaft rod, the inner diameter of the support bearing is adapted to the outer diameter of the end section shaft rod, and the outer diameter of the support bearing is adapted to the inner diameter of the end cavity.

[0030] Furthermore, at least one set of roller assemblies for supporting the conveyor belt is provided on the main telescopic section and the secondary telescopic section. The roller assembly includes a pair of rollers symmetrically arranged along the width direction of the telescopic section. The height of the ends of the pair of rollers close to each other is lower than the height of the ends of the pair of rollers far from each other, so that the upper end surfaces of the pair of rollers form a V-shaped structure for supporting the conveyor belt. The arrangement of the roller assembly can enhance the support for the conveyor belt, and the arrangement of the V-shaped structure can effectively suppress the deviation of the conveyor belt.

[0031] Furthermore, the fixed section, the main telescopic section, and the secondary telescopic section are all provided with a nested opening at one end thereof facing the next main telescopic section or the secondary telescopic section, and a supporting wheel group and a side limit wheel group are provided at the nested opening, wherein the supporting wheel group is used to support the next main telescopic section or the secondary telescopic section, and the side limit wheel group abuts against the side wall of the next main telescopic section or the secondary telescopic section. The provision of the side limit wheel group reduces the telescopic resistance of the main telescopic section or the secondary telescopic section. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic structural diagram of a wide telescopic conveyor according to an embodiment of the present invention;

[0033] Figure 2It is a cross-sectional schematic diagram of a wide telescopic conveyor according to an embodiment of the present invention;

[0034] Figure 3 This is a schematic diagram of the structure in which the first driving assembly is assembled on the fixed section according to an embodiment of the present invention;

[0035] Figure 4 This is a schematic diagram of the structure in which the second driving assembly is assembled on the telescopic section according to an embodiment of the present invention;

[0036] Figure 5 It is a structural schematic diagram of the secondary main transmission part of an embodiment of the present invention;

[0037] Figure 6 It is a structural schematic diagram of the secondary transmission part of an embodiment of the present invention;

[0038] Figure 7 is a schematic structural diagram of a second driving member according to an embodiment of the present invention;

[0039] Figure 8 It is a structural schematic diagram of a conveying mechanism according to an embodiment of the present invention;

[0040] Fig. 9 It is a cross-sectional schematic diagram of a reversing roller according to an embodiment of the present invention;

[0041] Fig.10 This is a schematic structural diagram of a roller shaft according to an embodiment of the present invention;

[0042] Fig.11 This is a schematic diagram of the structure of a secondary telescopic joint according to an embodiment of the present invention;

[0043] Fig.12 for Fig.11 A partial enlarged view of the middle A area;

[0044] Fig.13 It is a schematic structural diagram of a roller assembly according to an embodiment of the present invention.

[0045] In the figure:

[0046] 1-Fixed segment;

[0047] 2- telescopic section; 21- main telescopic section; 22- secondary telescopic section;

[0048] 3- telescopic drive mechanism; 31- first drive assembly; 311- first drive member; 312- main section front sprocket; 313- main section rear sprocket; 314- main section chain; 315- first connecting part; 32- second drive assembly; 321- second drive member; 3211- second drive motor; 3212- second main drive wheel; 3213- second slave drive wheel; 3214- second drive roller; 3215- second drive chain; 3216- tensioning plate; 3217- tension spring; 322- sub-section main transmission part; 3221- sub-section main front sprocket; 3222- sub-section main rear sprocket; 3223- sub-section main chain; 323- sub-section slave transmission part; 3231- sub-section slave front sprocket; 3232- sub-section slave rear sprocket; 3233- sub-section extending chain; 3234- sub-section retracting chain;

[0049] 4- conveying mechanism; 41- driving roller; 42- reversing roller; 421- cylinder; 422- roller shaft; 4221- middle section shaft rod; 4222- end section shaft rod; 423- support bearing; 424- positioning spring; 43- conveyor belt; 44- roller assembly; 441- roller;

[0050] 5-guide wheel assembly;

[0051] 6-Support wheel set;

[0052] 7-Side limit wheel set. DETAILED DESCRIPTION

[0053] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0054] Example

[0055] In the prior art, a telescopic conveyor is composed of a fixed section, a telescopic section, a telescopic drive mechanism and a conveying mechanism. Among them, the fixed section is the fixed fuselage, which is the fixed part of the equipment; the telescopic section is composed of a number of telescopic sections, which can be extended or retracted along the fixed section under the action of the telescopic drive mechanism to adjust the conveying length of the telescopic conveyor. For wide-width telescopic conveyors, the width of the door is mostly increased directly according to the structure of ordinary telescopic conveyors. However, due to the continuous increase in the width of the door, the weight of each part of the equipment will increase accordingly. During the telescopic process of the telescopic section, the support force required for the fixed section is relatively large, which directly affects the telescopic stability of the telescopic section.

[0056] Based on this, see Appendix Figure 1-2As shown, a wide telescopic conveyor of the present invention comprises a fixed section 1, a telescopic section 2, a telescopic drive mechanism 3, and a conveying mechanism 4, wherein the telescopic section comprises a main telescopic section 21 and at least two secondary telescopic sections 22 which are nested and connected in sequence, and one end of the main telescopic section 21 away from the secondary telescopic section 22 is nested on the fixed section 1. The telescopic drive mechanism 3 comprises a first drive assembly 31 and a second drive assembly 32 which can operate independently, the first drive assembly 31 is used to drive the telescopic movement of the main telescopic section 21 relative to the fixed section 1, and the second drive assembly 32 is used to drive the synchronous telescopic movement of all the secondary telescopic sections 22 relative to the main telescopic section 21. In the process of extending or retracting the telescopic section 2, the first drive assembly 31 can operate before the second drive assembly 32, so that after the main telescopic section 21 is fully extended or retracted, the secondary telescopic section 22 can perform synchronous telescopic movement.

[0057] In the telescopic section 2 of the present embodiment, the telescopic sections are divided: the telescopic section nested in the fixed section 1 is set as the main telescopic section 21, and the remaining telescopic sections are secondary telescopic sections 22; then in the telescopic drive mechanism 3, the telescopic movement of the main telescopic section 21 is separated from the telescopic movement of the remaining secondary telescopic sections 22 by setting the first drive component 31 and the second drive component 32, forming two independent telescopic movements. Among them, the first section is that the first driving component 31 drives the telescopic movement of the main telescopic section 21. At this time, all the secondary telescopic sections 22 remain stationary relative to the main telescopic section 21, and the fixed section 1 only needs to provide the supporting force required for the telescopic movement of the main telescopic section 21, thereby ensuring the telescopic stability of the main telescopic section 21 to a certain extent; the second section is that after the main telescopic section 21 is fully extended or retracted, the second driving component 32 drives all the secondary telescopic sections 22 to perform synchronous telescopic movement. At this time, the main telescopic section 21 remains stationary relative to the fixed section 1. Therefore, the main telescopic section 21 can be used as a whole with the fixed section 1 (equivalent to increasing the weight of the fixed section 1), and jointly provide the supporting force required for the telescopic movement of all the secondary telescopic sections 22, thereby improving the telescopic stability of the secondary telescopic sections 22.

[0058] It should be noted that, for the convenience of the following description, the extension direction of the telescopic section 2 is set as the orientation "forward", and the retraction direction of the telescopic section 2 is set as the orientation "rearward". The fixed section 1, the main telescopic section 21, and the secondary telescopic section 22 are arranged in sequence from the back to the front. In addition, taking the fixed section 1 and the main telescopic section 21 as an example, the nested connection means that the rear end of the main telescopic section 21 is embedded in the front end of the fixed section 1, so that the main telescopic section 21 can be telescopically moved relative to the fixed section 1.

[0059] In some embodiments, see Appendix Figure 2-3As shown, the first driving assembly 31 includes a first driving member 311, a main section front sprocket 312, a main section rear sprocket 313, and a main section chain 314. The main section front sprocket 312 and the main section rear sprocket 313 are arranged at the front and rear ends of the fixed section 1 respectively. The main section chain 314 is arranged on the main section front sprocket 312 and the main section rear sprocket 313 in a closed loop, and the main section chain 314 is connected to the main telescopic section 21; the first driving member 311 is connected to the main section rear sprocket 313 to drive the main section rear sprocket 313 to rotate. When the first driving member 311 drives the main section rear sprocket 313 to rotate, the main section chain 314 is immediately driven and drives the main section front sprocket 312 to rotate, and the main telescopic section 21 is then telescopically moved under the drive of the main section chain 314.

[0060] Furthermore, the main section chain 314 is provided with a first connection portion 315 for connecting the main telescopic section 21. The first connection portion 315 includes a first connection plate fixedly connected to the lower end of the main telescopic section 21, and the two free ends of the main section chain 314 are connected to the front and rear ends of the first connection plate through a chain pull block, so that the main section chain 314 and the first connection plate can form a closed loop structure.

[0061] In some embodiments, the first driving member 311 is installed at the rear end of the fixed section 1, and includes a first driving motor, a first main driving wheel, a first secondary driving wheel, a first driving chain and a first driving roller. The first driving roller is installed on the fixed section 1 along the width direction of the telescopic section 2, and a first driving chain in a closed loop is wound around the first main driving wheel and the first secondary driving wheel. The first driving motor is installed on the fixed section 1 and is coaxially connected to the first main driving wheel; the first secondary driving wheel and the main section rear sprocket are coaxially mounted on the first driving roller. Driving the main section rear sprocket 313 to rotate by sprocket transmission can improve driving stability.

[0062] In some embodiments, see Appendix Figure 4-6 As shown, the second drive assembly 32 includes a second drive member 321 and a telescopic transmission part; the telescopic transmission part is arranged in a one-to-one correspondence with the secondary telescopic section 22, so as to drive the corresponding secondary telescopic section 22 to perform telescopic movement relative to the adjacent previous secondary telescopic section 22 or the main telescopic section 21; wherein, the telescopic transmission part corresponding to the secondary telescopic section 22 closest to the main telescopic section 21 is the secondary-section main transmission part 322, and the remaining telescopic transmission parts are all secondary-section slave transmission parts 323.

[0063] See attached Figure 5As shown, the secondary section main transmission part 322 includes a secondary section main front sprocket 3221, a secondary section main rear sprocket 3222, and a secondary section main chain 3223. The secondary section main front sprocket 3221 and the secondary section main rear sprocket 3222 are respectively arranged at the front and rear ends of the main telescopic section 21, and the secondary section main chain 3223 is arranged on the secondary section main front sprocket 3221 and the secondary section main rear sprocket 3222 in a closed circle, and the secondary section main chain 3223 is fixedly connected to the secondary telescopic section 22 closest to the main telescopic section 21. The second driving member 321 is installed at the rear end of the main telescopic section 21 to drive the secondary section main rear sprocket 3222 to rotate. The driving principle of the second driving member 321 and the secondary section main transmission part 322 to the secondary telescopic section 22 (closest to the main telescopic section 21) is the same as the driving principle of the first driving component 31 to the main telescopic section 21, which will not be repeated here.

[0064] See attached Figure 6 As shown, the secondary section slave transmission part 323 includes a secondary section slave front sprocket 3231, a secondary section slave rear sprocket 3232, a secondary section extension chain 3233, and a secondary section retraction chain 3234. The secondary section slave front sprocket 3231 and the secondary section slave rear sprocket 3232 are arranged at the front and rear ends of the upper main telescopic section 21 (or secondary telescopic section 22) of the corresponding secondary telescopic section 22; one end of the secondary section extension chain 3233 is fixedly connected to the corresponding secondary telescopic section 22, and the other end is fixedly connected to the rear end of the upper two main telescopic sections 21 (or secondary telescopic section 22) of the corresponding secondary telescopic section 22 after bypassing the secondary section slave front sprocket 3231; one end of the secondary section retraction chain 3234 is fixedly connected to the corresponding secondary telescopic section 22, and the other end is fixedly connected to the front end of the upper two main telescopic sections 21 (or secondary telescopic section 22) of the corresponding secondary telescopic section 22 after bypassing the secondary section slave rear sprocket 3232.

[0065] It should be noted that the fixed section 1, the main telescopic section 21, and the secondary telescopic section 22 are regarded as a structure in which the sections are nested and connected one by one. The "upper section" refers to the section located at the rear end of itself and adjacent to itself (which can be the fixed section 1, the main telescopic section 21, or the secondary telescopic section 22), and the "upper two sections" refers to the section located at the rear end of itself and separated by a telescopic section. For example, if two secondary telescopic sections 22 are provided, the one located at the rear side (close to the main telescopic section 21) is the secondary telescopic section 1, and the one located at the front side (away from the main telescopic section 21) is the secondary telescopic section 2. For the secondary telescopic section 1, the main telescopic section 21 is the upper section, and the fixed section 1 is the upper two sections; for the secondary telescopic section 2, the secondary telescopic section 1 is the upper section, and the main telescopic section 21 is the upper two sections.

[0066] In the second drive assembly 32, the second drive member 321 is connected to the secondary-section main transmission part 322 to drive the telescopic movement of the secondary telescopic section 22 closest to the main telescopic section 21 (i.e., the secondary telescopic section 22 nested in the main telescopic section 21); and then the telescopic movement of the previous secondary telescopic section 22 is transmitted to the corresponding secondary telescopic section 22 through the secondary-section transmission part 323 to drive the telescopic movement of the corresponding secondary telescopic section 22.

[0067] In order to understand the driving principle of the second driving assembly, taking three secondary telescopic sections 22 as an example, in the direction from back to front, the three secondary telescopic sections 22 are sequentially set as secondary telescopic section one, secondary telescopic section two, and secondary telescopic section three.

[0068] When the second driving member 321 drives the secondary telescopic section 1 to extend, the secondary section from the front sprocket 3231 and the secondary section from the rear sprocket 3232 on the secondary telescopic section 1 move forward synchronously, and the secondary section from the front sprocket 3231 immediately pushes the corresponding secondary section extension chain 3233 for transmission. Because the two ends of the secondary section extension chain 3233 are respectively fixed on the main telescopic section 21 and the secondary telescopic section 2, and the main telescopic section 21 remains stationary, the secondary section extension chain 3233 can only drive the secondary telescopic section 2 to extend (in the direction away from the secondary telescopic section 1); similarly, when the secondary telescopic section 2 extends, the secondary section from the front sprocket 3231 and the secondary section from the rear sprocket 3232 on the secondary telescopic section 2 move forward synchronously, thereby driving the secondary telescopic section 3 to extend;

[0069] When the second driving member 321 drives the secondary telescopic section one to retract, the secondary section from the front sprocket 3231 and the secondary section from the rear sprocket 3232 on the secondary telescopic section one move backward synchronously, and the secondary section from the rear sprocket 3232 immediately pushes the corresponding secondary section retraction chain 3234 for transmission. Because the two ends of the secondary section retraction chain 3234 are respectively fixed on the main telescopic section 21 and the secondary telescopic section two, and the main telescopic section 21 remains stationary, the secondary section retraction chain 3234 can only drive the secondary telescopic section two (towards the direction close to the secondary telescopic section one) to retract; similarly, when the secondary telescopic section two retracts, the secondary section from the front sprocket 3231 and the secondary section from the rear sprocket 3232 on the secondary telescopic section two move backward synchronously, thereby driving the secondary telescopic section three to retract.

[0070] It should be noted that, for the secondary-section transmission part 323, when the secondary-section extending chain 3233 drives the corresponding secondary telescopic section 22 to extend, due to the forward movement of the secondary telescopic section 22, the secondary-section retraction chain 3234 can be transmitted accordingly to ensure that the secondary-section retraction chain 3234 is always wound around the secondary-section rear sprocket 3232; similarly, when the secondary-section retraction chain 3234 drives the corresponding secondary telescopic section 22 to retract, due to the backward movement of the secondary telescopic section 22, the secondary-section extending chain 3233 can be transmitted accordingly to ensure that the secondary-section extending chain 3233 is always wound around the secondary-section front sprocket 3231.

[0071] In some embodiments, see Appendix Figure 7 As shown, the second driving member 321 has the same structure as the first driving member 311, and includes a second driving motor 3211, a second main driving wheel 3212, a second slave driving wheel 3213, a second driving roller shaft 3214, and a second driving chain 3215. The second driving roller shaft 3214 is arranged on the main telescopic section 21 along the width direction of the telescopic section; the second main driving wheel 3212 and the second slave driving wheel 3213 are jointly wound with a second driving chain 3215 in a closed loop, the second driving motor 3211 is coaxially connected to the second main driving wheel 3212, and the second slave driving wheel 3213 and the secondary section main rear sprocket 3222 are coaxially mounted on the second driving roller shaft 3214.

[0072] Furthermore, the second main drive wheel 3212 and the second slave drive wheel 3213 are distributed up and down, and the axis connecting the second main drive wheel 3212 and the second slave drive wheel 3213 is a vertical line, and the outer diameter of the second slave drive wheel 3213 is larger than the outer diameter of the second main drive wheel 3212, so that the second drive chain 3215 can be retracted from the second slave drive wheel 3213 to the second main drive wheel 3212.

[0073] In order to increase the tension of the second drive chain 3215, in some embodiments, see the attached Figure 7 As shown, the second driving member 321 includes a chain tensioning portion, which includes a tensioning fixing plate and tensioning plates 3216 symmetrically arranged on both sides of the second main driving wheel 3212; the tensioning fixing plate is fixedly installed on the main telescopic section 21, and the tensioning plate 3216 abuts against the second driving chain 3215, one end of which is rotatably set on the tensioning fixing plate, and the other end is connected to another tensioning plate 3216 through a tension spring 3217; when the second driving chain 3215 is transmitted, the tension spring 3217 is in a stretched state.

[0074] Since the second drive chain 3215 is in a state of retracting from the second slave drive wheel 3213 to the second main drive wheel 3212, the tensioning plate 3216 can be inclined to abut against the second drive chain 3215. As shown in the figure, one tensioning plate 3216 (hereinafter referred to as the "left tensioning plate") abuts against the second drive chain 3215 located on the left side of the second main drive wheel 3212, and the other tensioning plate 3216 (hereinafter referred to as the "right tensioning plate") abuts against the second drive chain 3215 located on the right side of the second main drive wheel 3212.

[0075] When the second main driving wheel 3212 rotates clockwise, the second driving chain 3215 located on the left side of the second main driving wheel 3212 can be in a tensioned state. At this time, the left tensioning plate rotates to the left under the action of the tensioning force of the second driving chain 3215; the tension spring 3217 then drives the right tensioning plate to rotate to the left, thereby tightening the second driving chain 3215 located on the right side of the second main driving wheel 3212; similarly, when the second main driving wheel 3212 rotates counterclockwise, the second driving chain 3215 located on the right side of the second main driving wheel 3212 can be in a tensioned state. At this time, the right tensioning plate rotates to the right under the action of the tensioning force of the second driving chain 3215; the tension spring 3217 then drives the left tensioning plate to rotate to the right, thereby tightening the second driving chain 3215 located on the left side of the second main driving wheel 3212. Through the cooperation of the two tensioning plates 3216 and the tension spring 3217, both sides of the second driving chain 3215 can be tensioned, so that the second driving chain 3215 can be tensioned during clockwise or counterclockwise transmission.

[0076] It should be noted that the above structural improvement of the telescopic drive mechanism 3 is to enhance the telescopic stability of the telescopic section 2 from the perspective of improving the supporting force of the drive mechanism. In addition, since the conveying mechanism 4 is arranged between the fixed section 1 and the telescopic section 2, the purpose of enhancing the telescopic stability of the telescopic section 2 can also be achieved by reducing the weight of the conveying mechanism 4.

[0077] For details, see the attached Figure 2 , Figure 8 As shown, the conveying mechanism 4 includes a driving roller 41 and a plurality of reversing rollers 42. The driving roller 41 can rotate under the action of a roller driving member, and a conveyor belt 43 in a closed loop structure is wound around the plurality of reversing rollers 42 and the driving roller 41. Among them, the driving roller 41 and the roller driving member are arranged at the rear end of the fixed section 1. The plurality of reversing rollers 42 are respectively arranged at the front and rear ends of the fixed section 1, the front and rear ends of the main telescopic section 21, and the front and rear ends of each secondary telescopic section 22. The reversing rollers 42 located at the front and rear ends of the fixed section 1 are arranged on the same horizontal plane, and the reversing rollers 42 located at the front and rear ends of the main telescopic section 21 or the secondary telescopic section 22 are arranged on different horizontal planes. When the telescopic section 2 is in a retracted state, the conveyor belt 43 is arranged on the plurality of reversing rollers 42 in a serpentine shape.

[0078] When the telescopic section 2 is extended under the action of the telescopic drive mechanism 3, the reversing rollers 42 located on the main telescopic section 21 and the secondary telescopic section 22 can move to the specified position. At this time, the serpentine conveyor belt 43 can be unfolded to adapt to the extension length of the telescopic section 2; when the telescopic section 2 is extended to the right position, the conveyor belt 43 can be driven on the driving roller 41 and the reversing rollers 42 through the rotation of the driving roller 41, so as to convey the goods on the conveyor belt 43. It is a prior art to realize the transmission of the conveyor belt 43 through the cooperation of the roller driving member, the driving roller 41 and the reversing roller 42, and the specific working principle thereof will not be described in detail in this embodiment.

[0079] As the width of the wide telescopic conveyor increases, the length and weight of the reversing roller 42 will increase accordingly, and since there are a large number of reversing rollers 42 in the conveying mechanism 4, this invisibly increases the weight of the conveying mechanism 4. Based on this, the purpose of reducing the weight of the conveying mechanism 4 can be achieved by reducing the weight of the reversing roller 42.

[0080] In some embodiments, see Appendix Fig. 9 As shown, the reversing roller 42 includes a cylinder 421 and a support assembly. A cavity is provided in the cylinder and runs through the cylinder to the left and right. The support assembly includes two groups of support parts respectively located at the two ends of the cavity. Each group of support parts includes a roller shaft 422 and at least two support bearings 423. The roller shaft 422 is coaxially arranged with the cylinder 421, one end of which is located in the cavity and the other end extends out of the cavity. At least two support bearings 423 are spaced apart and sleeved on the roller shaft 422 located in the cavity, and a gap is left between the roller shafts 422 of the two groups of support parts.

[0081] During assembly, the roller shafts 422 (one end located outside the cavity) of the two support parts are fixedly installed on the fixed section 1, the main telescopic section 21 or the secondary telescopic section 22. When the cylinder 421 rotates, the cylinder 421 can maintain stable rotation due to the support of the two support parts to the cylinder 421. By arranging two support parts at both ends of the cylinder 421, while ensuring stable support for the cylinder 421, the size of the support part is not changed by the change of the length size of the cylinder; and the coaxial arrangement of the roller shafts 422 of the two groups of support parts and the cylinder 421 ensures that the two roller shafts 422 are on the same axis, thereby ensuring the stability of the rotation axis of the cylinder 421; and at least two support bearings 423 are arranged at intervals on each roller shaft 422, and at least four support bearings 423 are arranged at intervals on the two roller shafts 422, which can enhance the support effect on the cylinder 421 and thereby improve the stability of the rotation of the cylinder; and the gap left between the two groups of support parts can effectively reduce the weight of the reversing roller 42.

[0082] In order to define the installation position of the support portion, in some embodiments, see the attached Fig. 9As shown, the cavity includes a middle cavity and end cavities located at both ends of the middle cavity, and the end cavities are used to accommodate the support part; the inner diameter of the middle cavity is smaller than the inner diameter of the end cavity, so that a limiting step for the support part to abut can be formed at the junction of the middle cavity and the end cavity. When the support part is assembled into the corresponding end cavity, one end of the support part facing the middle cavity can abut on the limiting step to inhibit the relative movement of the support part and the cylinder 421 in the axial direction.

[0083] See attached Figure 9-10 As shown, the roller shaft 422 includes a coaxially arranged and integrally formed middle section shaft rod 4221 and an end section shaft rod 4222, two end section shaft rods 4222 are provided and are respectively located at the two ends of the middle section shaft rod 4221; the outer diameter of the middle section shaft rod 4221 is larger than the outer diameter of the end section shaft rod 4222; two support bearings 423 are provided and are sleeved on the end section shaft rod 4222 one by one, the inner diameter of the support bearing 423 is adapted to the outer diameter of the end section shaft rod 4222, and the outer diameter of the support bearing 423 is adapted to the inner diameter of the end cavity, so as to realize the support of the cylinder body 421. By limiting the radial dimensions of the end section shaft rod 4222 and the middle section shaft rod 4221, the roller shaft 422 can realize the self-positioning of the support bearing 423, and ensure the consistency of the assembly position of the support bearing 423.

[0084] Furthermore, a positioning spring 424 that can abut against the support bearing 423 is mounted on the end section shaft rod 4222 away from the middle cavity. Furthermore, a positioning ring groove for the positioning spring 424 to be embedded is provided on the inner wall of one end of the end cavity away from the middle cavity. During assembly, firstly, the two support bearings 423 are mounted on the two end section shaft rods 4222 of the roller shaft 422 respectively, and the two support bearings 423 abut against the two ends of the middle section shaft rod 4221; then the roller shaft 422 with the support bearings 423 mounted thereon is inserted into the cavity until one of the support bearings 423 abuts against the limiting step, and then the positioning spring 424 is mounted on the end section shaft rod 4222 of the roller shaft 422 from one end of the roller shaft 422 located outside the cavity until the positioning spring 424 is embedded in the positioning ring groove, at which time, the positioning spring 424 abuts against the other support bearing 423. During the assembly process, one support bearing 423 is limited on the limiting step and the middle shaft 4221 , and the other support bearing 423 is limited between the middle shaft 4221 and the positioning clamping spring 424 .

[0085] In some embodiments, see Appendix Figure 11-13As shown, at least one set of roller assemblies 44 for supporting the conveyor belt 43 are provided on the main telescopic section 21 and the secondary telescopic section 22. The roller assembly 44 includes a pair of rollers 441 symmetrically arranged along the width direction of the telescopic section. The height of the end of the pair of rollers 441 close to each other is lower than the height of the end of the pair of rollers 441 away from each other, so that the upper end surfaces of the pair of rollers 441 form a V-shaped structure for supporting the conveyor belt 43. The arrangement of the roller assembly 44 can enhance the support for the conveyor belt 43. At the same time, the arrangement of the V-shaped structure can effectively prevent the conveyor belt 43 from running off.

[0086] In some embodiments, see Appendix Fig.11 As shown, the rear ends of the main telescopic section 21 and the secondary telescopic section 22 are each provided with a guide wheel assembly 5, which includes an upper guide wheel, a lower guide wheel, and a side guide wheel. The upper guide wheel and the lower guide wheel abut against the upper fixed section 1 or the main telescopic section 21 or the secondary telescopic section 22 in the vertical direction, and the side guide wheel abuts against the upper fixed section 1 or the main telescopic section 21 or the secondary telescopic section 22 in the horizontal direction to guide the telescopic direction.

[0087] In addition, see Appendix Figure 11-12 As shown, the fixed section 1, the main telescopic section 21, and the secondary telescopic section 22 are all provided with a nesting opening at one end facing the next main telescopic section 21 or the secondary telescopic section 22, and the nesting opening is provided with a supporting wheel group 6 and a side limiting wheel group 7, the supporting wheel group 6 is used to support the next main telescopic section 21 or the secondary telescopic section 22, and the side limiting wheel group 7 is abutted against the side wall of the next main telescopic section 21 or the secondary telescopic section 22. The provision of the side limiting wheel group 7 reduces the telescopic resistance of the main telescopic section 21 or the secondary telescopic section 22.

[0088] The above implementation modes are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with this technology to understand the content of the present invention and implement it, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A wide telescopic conveyor, characterized in that: include Fixed segment; The telescopic section comprises a main telescopic section and at least two secondary telescopic sections which are nested in sequence, wherein one end of the main telescopic section away from the secondary telescopic section is nested in the fixed section; The telescopic drive mechanism comprises a first drive assembly and a second drive assembly which can operate independently, wherein the first drive assembly is used to drive the telescopic movement of the main telescopic section relative to the fixed section, and the second drive assembly is used to drive the synchronous telescopic movement of all the secondary telescopic sections relative to the main telescopic section; The conveying mechanism comprises a driving roller and a plurality of reversing rollers, wherein the driving roller can rotate under the action of a roller driving member, and a conveying belt in a closed loop structure is wound around the plurality of reversing rollers and the driving roller; during the extension or retraction of the telescopic section, the first driving assembly can operate before the second driving assembly, so that after the main telescopic section is fully extended or retracted, the secondary telescopic section can perform synchronous telescopic movement; The second drive assembly includes a second drive member and a telescopic transmission part; the telescopic transmission part is arranged in one-to-one correspondence with the secondary telescopic section, and is used to drive the corresponding secondary telescopic section to telescopically move relative to the adjacent previous secondary telescopic section or the main telescopic section; wherein the telescopic transmission part corresponding to the secondary telescopic section closest to the main telescopic section is the secondary section main transmission part, and the other telescopic transmission parts are all secondary section slave transmission parts; The secondary section main transmission part comprises a secondary section main front sprocket, a secondary section main rear sprocket, and a secondary section main chain; the secondary section main front sprocket and the secondary section main rear sprocket are respectively arranged at the front and rear ends of the main telescopic section; the secondary section main chain is arranged on the secondary section main front sprocket and the secondary section main rear sprocket in a closed loop, and the secondary section main chain is fixedly connected to the secondary telescopic section closest to the main telescopic section; The secondary-section slave transmission part includes a secondary-section slave front sprocket, a secondary-section slave rear sprocket, a secondary-section extension chain, and a secondary-section retraction chain; the secondary-section slave front sprocket and the secondary-section slave rear sprocket are arranged at the front and rear ends of the corresponding main telescopic section or secondary telescopic section of the upper section of the secondary telescopic section; one end of the secondary-section extension chain is fixedly connected to the corresponding secondary telescopic section, and the other end passes through the secondary-section slave front sprocket and is fixedly connected to the rear end of the corresponding main telescopic section or secondary telescopic section of the upper two sections of the secondary telescopic section; one end of the secondary-section retraction chain is fixedly connected to the corresponding secondary telescopic section, and the other end passes through the secondary-section slave rear sprocket and is fixedly connected to the front end of the corresponding main telescopic section or secondary telescopic section of the upper two sections of the secondary telescopic section; The second driving member is installed at the rear end of the main telescopic section to drive the main rear sprocket of the secondary section to rotate; The first driving assembly includes a first driving member, a main section front sprocket, a main section rear sprocket, and a main section chain. The main section front sprocket and the main section rear sprocket are arranged at the front and rear ends of the fixed section respectively. The main section chain is arranged on the main section front sprocket and the main section rear sprocket in a closed loop, and the main section chain is connected to the main telescopic section; the first driving member is connected to the main section rear sprocket to drive the main section rear sprocket to rotate; The driving roller is arranged at the rear end of the fixed section; a plurality of reversing rollers are arranged at the front and rear ends of the fixed section, the front and rear ends of the main telescopic section, and the front and rear ends of each secondary telescopic section; the reversing rollers at the front and rear ends of the fixed section are arranged on the same horizontal plane, and the reversing rollers at the front and rear ends of the main telescopic section or the secondary telescopic section are arranged on different horizontal planes; when the telescopic section is in a retracted state, the conveyor belt is arranged on a plurality of reversing rollers in a serpentine shape; The reversing roller comprises a cylinder body and a support assembly. A cavity is provided in the cylinder body and runs through the left and right sides. The support assembly comprises two groups of support parts respectively located at two ends of the cavity. Each group of support parts comprises a roller shaft and at least two support bearings. The roller shaft is coaxially arranged with the cylinder body, one end of which is located in the cavity and the other end extends out of the cavity. At least two support bearings are spaced and sleeved on the roller shaft located in the cavity, and a gap is left between the roller shafts of the two groups of support parts. The cavity comprises a middle cavity and end cavities located at both ends of the middle cavity, and the end cavities are used to accommodate the support part; the inner diameter of the middle cavity is smaller than the inner diameter of the end cavity, so that a limiting step for the support part to abut can be formed at the junction of the middle cavity and the end cavity; The roller shaft includes a middle section shaft rod and an end section shaft rod which are coaxially arranged and integrally formed, and two end section shaft rods are provided and respectively located at the two ends of the middle section shaft rod; the outer diameter of the middle section shaft rod is larger than the outer diameter of the end section shaft rod; there are two support bearings, which are mounted one by one on the end section shaft rod, and the inner diameter of the support bearing is adapted to the outer diameter of the end section shaft rod, and the outer diameter of the support bearing is adapted to the inner diameter of the end cavity.

2. The wide telescopic conveyor according to claim 1, characterized in that: The second driving member includes a second driving motor, a second main driving wheel, a second slave driving wheel, a second driving roller shaft, and a second driving chain. The second driving roller shaft is arranged on the main telescopic section along the width direction of the telescopic section; a second driving chain in a closed loop is wound around the second main driving wheel and the second slave driving wheel. The second driving motor is coaxially connected to the second main driving wheel, and the second slave driving wheel and the secondary section main rear sprocket are coaxially mounted on the second driving roller shaft.

3. The wide telescopic conveyor according to claim 2, characterized in that: The second driving member also includes a chain tensioning portion, which includes a tensioning fixing plate and tensioning plates symmetrically arranged on both sides of the second main driving wheel; the tensioning fixing plate is fixedly installed on the main telescopic joint, and the tensioning plate abuts against the second driving chain, one end of which is rotatably arranged on the tensioning fixing plate, and the other end is connected to the other tensioning plate through a tension spring; when the second driving chain is transmitting, the tension spring is in a stretched state.

4. The wide telescopic conveyor according to claim 1, characterized in that: The main telescopic section and the secondary telescopic section are each provided with at least one group of roller assemblies for supporting the conveyor belt. The roller assembly includes a pair of rollers symmetrically arranged along the width direction of the telescopic section. The height of one end of the pair of rollers that are close to each other is lower than the height of one end of the pair of rollers that are far away from each other, so that the upper end surfaces of the pair of rollers form a V-shaped structure for supporting the conveyor belt.

5. The wide telescopic conveyor according to claim 1, characterized in that: The fixed section, the main telescopic section, and the secondary telescopic section are all provided with a nested opening at one end facing the main telescopic section or the secondary telescopic section of the next section, and a supporting wheel group and a side limiting wheel group are provided at the nested opening. The supporting wheel group is used to support the main telescopic section or the secondary telescopic section of the next section, and the side limiting wheel group abuts against the side wall of the main telescopic section or the secondary telescopic section of the next section.

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