A telescopic belt conveyor

Abstract

This invention discloses a telescopic belt conveyor, belonging to the field of belt conveyor technology. It aims to solve the technical problem of the limited conveying form of traditional equipment in complex and changing working conditions. The invention includes a conveyor frame with a telescopic structure, a drive cabinet arranged on one side of the conveyor frame, and a roller mechanism arranged on the conveyor frame. This invention utilizes the spatial displacement of several roller group modules and the arc shape formed by the coordinated bending of these modules to guide materials towards the center through the centripetal guiding force generated by the curved surface, effectively solving the problems of spillage and uneven loading in bulk material conveying. By controlling the radial expansion of the combined components between the cylindrical components to form a cam structure, and coordinating with the alternating convergence of adjacent modules, the conveyor belt is forced to form a wave-shaped cross-section. The difference in the height of the crests and troughs simultaneously accommodates and limits bulk materials and forms multi-point anti-rolling contact for large materials, significantly improving conveying stability.

Description

Technical Field

[0001] This invention relates to the field of belt conveyor technology, and more specifically, to a retractable belt conveyor. Background Technology

[0002] Currently, belt conveyors are widely used in the field of bulk material conveying. However, when faced with complex and ever-changing working conditions, traditional equipment generally suffers from the drawback of a single conveying mode. The existing conveyor idler structure is fixed and cannot dynamically adjust the cross-sectional shape of the belt according to the material characteristics. As a result, when handling mixtures with high moisture content or uneven particle size, the material is easily spread and spilled to both sides due to inertial forces and vibrations. This not only causes environmental pollution and material waste, but also significantly increases the difficulty of on-site cleanup and safety hazards.

[0003] Meanwhile, when existing equipment is conveying large materials or operating at an angle, the lack of an effective longitudinal limiting mechanism on the belt surface makes it easy for large materials to roll, slip, or be unbalanced. This unstable conveying state not only reduces transportation efficiency but may also cause excessive local stress on the equipment, leading to serious accidents such as conveyor belt tearing, frame deformation, or even equipment overturning, making it difficult to meet the requirements of high stability and high safety in operation.

[0004] Furthermore, traditional telescopic conveyors only focus on changes in frame length, neglecting the coordination of the transmission system during extension and retraction. When the frame bends and changes amplitude, the fixed transmission connection cannot adapt to changes in the angle between adjacent shafts, easily generating additional bending moments and axial misalignment. This leads to equipment sluggishness, accelerated wear of transmission components, and even the risk of belt breakage, severely restricting the conveyor's adaptability in complex terrain and its long-term operational reliability. Therefore, we propose a telescopic belt conveyor. Summary of the Invention

[0005] The purpose of this invention is to provide a retractable belt conveyor to solve the technical problem that traditional equipment generally suffers from a single conveying mode when facing complex and ever-changing working conditions.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a telescopic belt conveyor, including a conveyor frame with a telescopic structure, a drive cabinet arranged on one side of the conveyor frame, and a roller mechanism arranged on the conveyor frame; The roller mechanism includes several sets of idler roller assemblies arranged sequentially along the conveying direction; The idler assembly includes at least three roller shaft modules, with adjacent roller shaft modules connected by a universal ball joint component, so that the modules can maintain linkage and adapt to angle deflection. By applying a directional force to the roller assembly modules at both ends through the output end of the hydraulic components and the telescopic components arranged at both ends of each roller assembly module, the roller assembly modules at both ends, together with the remaining roller assembly modules in the middle, undergo coordinated displacement, causing the roller assembly modules that were originally in a straight line to undergo spatial bending and jointly form an arc shape. The roller assembly module includes two cylindrical components and a combined component arranged between the cylindrical components that can move axially or radially along the cylindrical components; When the composite component expands radially, it forms a cam structure between the two cylindrical components; When several roller assembly modules unfold or converge alternately, the conveyor belt is periodically squeezed by the contour, and its transverse cross-section is wavy. This invention can achieve dynamic reconstruction of the conveyor belt cross-sectional shape through the spatial displacement of several roller assembly modules: On the one hand, by using the arc shape formed by the coordinated bending of several roller assembly modules, the centripetal guiding force generated by the curved surface gathers the material towards the center, effectively solving the problems of spillage and off-center loading in bulk material conveying; on the other hand, by controlling the radial unfolding of the combined components between the cylindrical components to form a cam structure, and cooperating with the alternating convergence of adjacent modules, the conveyor belt is forced to form a wavy cross-section. The difference between the peaks and troughs simultaneously accommodates and limits the bulk materials and forms multi-point anti-rolling for large materials, significantly improving the conveying stability; in addition, the adjacent modules are connected by universal ball joint components, which ensures continuous power transmission while adapting to changes in the bending angle, avoiding jamming caused by axial misalignment, so that the conveyor can maintain a high-efficiency and stable operating state throughout the entire process of length extension and shape transformation.

[0007] Preferably, each roller assembly module includes two roller shafts, each roller shaft has stepped holes arranged in a ring array on one side, each roller shaft has a drive shaft slidably fitted inside, each drive shaft has several grooves arranged in a ring array on its surface, and the grooves are adapted to the inner wall of the roller shaft, and each drive shaft has several first combination blocks and several second combination blocks arranged in a ring array on its surface.

[0008] A plurality of the first assembly blocks and a plurality of the second assembly blocks together constitute a composite component; A plurality of the first combined blocks and a plurality of the second combined blocks each correspond to a plurality of radial positions of the slide grooves; In this configuration, several first assembly blocks are fixedly connected to each other in the two roller shafts.

[0009] Preferably, each of the drive shaft surfaces is slidably arranged in a ring array with a plurality of first sliding seats and a plurality of second sliding seats, wherein the first sliding seats correspond to the radial positions of the first combined block and the second combined block corresponds to the radial positions of the second sliding seats.

[0010] Preferably, a plurality of first sliding seats and a plurality of second sliding seats are slidably adapted inside the slide groove, and the second combined block corresponding to the radial position is hinged to the first sliding seat through a multi-link group.

[0011] Preferably, each of the second sliding seats has a stepped rod fixedly connected to one end, and the stepped rod is inserted into the stepped hole. Each of the first sliding seats has a telescopic rod fixedly connected to one end, and the mounting seat of the telescopic rod is fixedly connected to the inner wall of one side of the roller shaft.

[0012] Preferably, the idler assembly further includes a transverse support, which is fixedly connected to the inner walls on both sides of the conveyor frame. Vertical supports are fixedly connected to both ends of the transverse support, and limit holes are formed on the upper surface of the transverse support.

[0013] Preferably, the hydraulic component consists of two hydraulic rods, which are respectively fixedly connected to a vertical support. Each vertical support has an adjusting ring slidably fitted inside, and the adjusting ring is fixedly connected to the output end of the hydraulic rod. A fixing ring with a pin is sleeved inside the adjusting ring. The inner wall of the adjusting ring is arranged with an inner ring groove, and the pin on the fixing ring is inserted into the inner ring groove. In the roller assembly modules at the two ends, the drive shaft is sleeved inside the fixing ring through a bearing.

[0014] Preferably, the telescopic component includes a plurality of movable seats, each of which has an insert plate fixedly connected to its upper surface, and an insert shell slidably fitted onto the surface of the insert plate. The plurality of movable seats are slidably adapted to the transverse support, and the roller shaft assembly module is located between two adjacent roller shaft assembly modules. The drive shaft is inserted into a fixing hole arranged on the housing. Each fixing hole is fitted with a limiting ring. The inner wall of the limiting ring is arranged with an inner groove. A drive ring with a pin is fitted inside the limiting ring, and the pin on the drive ring is inserted into the inner groove.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention achieves dynamic reconstruction of the conveyor belt cross-sectional shape through the spatial displacement of several roller assembly modules: On the one hand, by utilizing the arc shape formed by the coordinated bending of several roller assembly modules, the centripetal guiding force generated by the curved surface gathers the material towards the center, effectively solving the problems of spillage and eccentric loading in bulk material conveying; on the other hand, by controlling the radial expansion of the combined components between the cylindrical components to form a cam structure, and cooperating with the alternating convergence of adjacent modules, the conveyor belt is forced to form a wave-shaped cross-section. The difference between the peaks and troughs simultaneously accommodates and limits the bulk materials and forms multi-point anti-rolling for large materials, significantly improving the conveying stability; in addition, the adjacent modules are connected by universal ball joint components, which ensures continuous power transmission while adapting to changes in the bending angle, avoiding jamming caused by axial misalignment, so that the conveyor can maintain a high-efficiency and stable operating state throughout the entire process of length extension and shape transformation.

[0016] 2. This invention uses a hydraulic rod to drive an adjusting ring, causing the roller assembly module to move spatially, forcing the conveyor belt cross-section to be arc-shaped. The centripetal guiding force generated by the curved surface gathers the material towards the center, effectively solving the problem of material spillage. At the same time, by controlling several roller assembly modules to alternately unfold or converge along the conveying direction, the contour (cam structure) formed by the first and second assembly blocks makes the conveyor belt form a wave-shaped cross-section. This structure uses the troughs to accommodate loose materials and the crests to form multi-point contact and restraint on large pieces of material, completely overcoming the technical problems of easy material rolling and uneven loading in traditional flat belt conveyors.

[0017] 3. This invention achieves two-stage timing control of the expansion of the modular blocks through the cooperation of the telescopic rod and the stepped rod: First, the roller shaft moves towards each other to compress the telescopic rod, pushing the first sliding seat through the multi-link group to cause several first modular blocks to expand radially; then, the boss of the stepped rod passes through the stepped hole, pushing the second sliding seat to move, and then through the multi-link group to cause several second modular blocks to first make axial clearance and then expand radially; this "inside first, then outside, radial first, then axial" action logic avoids motion interference between components, ensures the complete construction of the circular cross-section cam structure, and improves the reliability and lifespan of the mechanism.

[0018] 4. By setting up a universal ball joint component, this invention establishes a flexible connection between adjacent transmission shafts. This ensures that when any roller shaft module is driven by the drive motor, the torque can be transmitted to the other modules through the spherical pair meshing (power continuity). It also allows adjacent modules to adapt to changes in included angle when spatial bending occurs (angle adaptability). Combined with the stepped sliding structure formed by the insert plate and insert shell on the moving seat, and the circumferential positioning of the limiting ring and drive ring, the entire roller shaft mechanism maintains the coaxiality and synchronization between the modules when it expands and contracts with the conveyor frame, avoiding the risk of jamming or belt breakage caused by axial misalignment. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 This is a cross-sectional schematic diagram of the roller mechanism structure of the present invention.

[0021] Figure 3 This is a three-dimensional structural diagram of the roller mechanism of the present invention.

[0022] Figure 4 This is a cross-sectional structural diagram of the roller assembly module of the present invention.

[0023] Figure 5 This is a three-dimensional exploded view of the roller assembly module of the present invention.

[0024] Figure 6 This is a schematic diagram of the three-dimensional partially exploded structure of the roller assembly module of the present invention. Figure 1 .

[0025] Figure 7 This is a schematic diagram of the three-dimensional partially exploded structure of the roller assembly module of the present invention. Figure 2 .

[0026] Figure 8 For the present invention Figure 7 Enlarged structural diagram at point A in the middle.

[0027] Figure 9 This is a schematic diagram of the three-dimensional structure of the vertical support of the present invention.

[0028] Figure 10 This is a partial cross-sectional structural diagram of the roller assembly module of the present invention.

[0029] The following are the labels in the diagram: 1. Conveyor frame; 11. Drive cabinet; 2. Roller mechanism; 21. Roller assembly module; 211. Roller shaft; 2111. Stepped hole; 212. Drive shaft; 2121. Slide groove; 213. First assembly block; 214. Second assembly block; 215. First sliding seat; 2151. Telescopic rod; 216. Second sliding seat; 2161. Stepped rod; 22. Horizontal support; 221. Vertical support; 2211. Adjusting ring; 2212. Fixing ring; 222. Limiting hole; 23. Hydraulic rod; 24. Moving seat; 241. Insert plate; 242. Insert shell; 25. Limiting ring; 251. Drive ring; 3. Conveyor belt. Detailed Implementation

[0030] like Figure 1 As shown, the present invention relates to a telescopic belt conveyor, including a conveyor frame 1 with a telescopic structure, a drive cabinet 11 arranged on one side of the conveyor frame 1, and a roller mechanism 2 arranged on the conveyor frame 1.

[0031] Specifically, the conveyor frame 1 is composed of several conveying modules, all of which are nested together by a sliding mechanism (i.e., linear guide rails or slide rail sliders) to achieve continuous adjustment of the overall length. The bottom of the conveyor frame 1 is fixed with a set of walking wheels, and the conveying modules are driven to move along a preset track by a hydraulic mechanism on the conveyor frame 1 to meet the needs of different loading and unloading operation positions. The drive cabinet 11 integrates a PLC controller, a frequency converter, and a hydraulic control solenoid valve group to control the start and stop, extension and retraction of the whole machine, and automatic tension adjustment. The drive cabinet 11 includes a drive motor and a chain and other transmission components to drive the roller mechanism 2 to rotate, thereby driving the conveyor belt 3 arranged on the roller mechanism 2.

[0032] like Figure 2 As shown, the roller mechanism 2 of this embodiment includes several sets of idler roller assemblies arranged sequentially along the conveying direction. These idler roller assemblies are identical in structure and function; therefore, any one idler roller assembly will be described below: Each idler roller assembly includes at least three roller assembly modules 21. Adjacent roller assembly modules 21 are connected via a universal ball joint, allowing both linkage and adaptive angle deflection between modules. Simultaneously, the mechanism is equipped with a hydraulic component output end and telescopic components arranged at both ends of each roller assembly module 21. Through the combined action of hydraulic and mechanical telescopic forces, a directional force is applied to the roller assembly modules 21 located at both ends. Under this force, the roller assembly modules 21 at both ends, along with the remaining intermediate roller assembly modules 21, undergo coordinated displacement, causing the roller assembly modules 21, which were originally in a straight line, to undergo spatial bending, collectively forming an arc shape. At this time, when the conveyor belt 3 is conveying, its cross-section becomes arc-shaped. The centripetal guiding force generated by this curved surface structure can concentrate the conveyed material towards the center, thereby achieving the effect of preventing spillage and concentrating the conveying. The roller assembly module 21 includes two cylindrical components and a combined component arranged between the cylindrical components that can move axially or radially along the cylindrical components. When the combined component moves radially (i.e., in the unfolded state), the combined component forms a cam structure between the two cylindrical components. When the combined component moves radially and converges, the diameter of the combined component is smaller than the diameter of the cylindrical component. When several roller assembly modules 21 unfold or converge alternately in sequence, the conveyor belt 3 is periodically squeezed by the contour, and its transverse cross-section is wavy. The troughs are used to gather and contain the loose material, and the crests are used to form multi-point contact and limit the large pieces of material, thereby preventing the material from being unbalanced or rolling off during the conveying process.

[0033] Combination Figures 4-8 and Figure 10As shown, in this embodiment, the several roller assembly modules 21 are completely identical in structure and function. Therefore, any one roller assembly module 21 will be described below: The roller assembly module 21 includes two roller shafts 211. Each roller shaft 211 has stepped holes 2111 arranged in a ring array on one side. A drive shaft 212 is slidably sleeved inside each roller shaft 211. Several grooves 2121 are arranged in a ring array on the surface of each drive shaft 212, and the grooves 2121 are adapted to the inner wall of the roller shaft 211. Several first combination blocks 213 and several second combination blocks 214 are arranged in a ring array on the surface of each drive shaft 212, and the several first combination blocks 213 and several second combination blocks 214 are radially aligned with the several grooves 2121. Correspondingly, several first assembly blocks 213 are fixedly connected in the two roller shafts 211; specifically, the assembly components are several first assembly blocks 213 and several second assembly blocks 214; the present invention drives the adjusting ring 2211 through the hydraulic rod 23, causing the roller shaft assembly module 21 to undergo spatial displacement, forcing the cross-section of the conveyor belt 3 to be arc-shaped, and using the centripetal guiding force generated by the curved surface to gather the material towards the center, effectively solving the problem of material spillage; at the same time, by controlling the several roller shaft assembly modules 21 to alternately unfold or converge along the conveying direction, the conveyor belt 3 forms a wave-shaped cross-section by using the contour (cam structure) formed by the first assembly blocks 213 and the second assembly blocks 214; this structure uses the troughs to accommodate loose materials and the crests to shape large pieces of material. The multi-point contact limiting mechanism completely overcomes the technical problems of easy material rolling and uneven loading in traditional flat belt conveyors. Each drive shaft 212 has several first sliding seats 215 and several second sliding seats 216 arranged in a circular array on its surface. The first sliding seats 215 correspond radially to the first combined block 213, and the second combined blocks 214 correspond radially to the second sliding seats 216. Both the first sliding seats 215 and the second sliding seats 216 are slidably fitted inside the slide groove 2121. The second combined blocks 214 corresponding to the radial positions are hinged to the first sliding seats 215 via a multi-link assembly, and the second combined blocks 214 corresponding to the radial positions are hinged to the second sliding seats 216 via a multi-link assembly. One end of each second sliding seat 216 is fixedly connected to... A stepped rod 2161 is inserted into a stepped hole 2111. It is worth noting that, in the initial state, the boss on the stepped rod 2161 is located at the constricted hole within the stepped hole 2111, causing the stepped rod 2161 to slide within the stepped hole 2111 during the initial movement of the roller shaft 211, thereby preventing the second sliding seat 216 from moving. Each first sliding seat 215 has a telescopic rod 2151 fixedly connected to one end, and the mounting seat of the telescopic rod 2151 is fixedly connected to the inner wall of one side of the roller shaft 211. It is worth noting that during the initial movement of the roller shaft 211, the telescopic rod 2151 is compressed to its maximum extent, allowing the roller shaft 211 to push the first sliding seat 215 to move during the initial movement.Specifically, when the two roller shafts 211 move towards each other, the telescopic rod 2151 is compressed to its extreme point, which can push the first sliding seat 215 to move. Through the multi-link assembly, several first assembly blocks 213 can move radially and unfold. After the several first assembly blocks 213 unfold, the boss on the stepped rod 2161 passes through the stepped hole 2111, so that one end of the second sliding seat 216 contacts the inner wall of one side of the roller shaft 211, pushing the second sliding seat 216 to move. Then, through the transmission of the multi-link assembly, several second assembly blocks 214 first move along the transmission path. The axis of the moving shaft 212 moves, and then moves radially to unfold, so that the several first combined blocks 213 and several second combined blocks 214 in the unfolded state together form a complete circular cross-section cam structure. When the several roller shaft modules 21 are alternately in the unfolded or gathered state along the conveying direction, the conveyor belt 3 is periodically squeezed by this contour, and its transverse cross-section is wavy. The troughs are used to gather and contain the loose materials, and the crests are used to form multi-point contact and limiting of large pieces of material, thereby preventing the material from being unbalanced or rolling off during the conveying process.

[0034] This invention achieves two-stage timing control of the expansion of the modular blocks through the cooperation of the telescopic rod 2151 and the stepped rod 2161: First, the roller shaft 211 moves towards each other to compress the telescopic rod 2151, pushing the first sliding seat 215 through the multi-link group to cause several first modular blocks 213 to expand radially; then, the boss of the stepped rod 2161 passes through the stepped hole 2111, pushing the second sliding seat 216 to move, and then through the multi-link group to cause several second modular blocks 214 to first make axial clearance and then expand radially; this "inner-outer, radial-to-axial" action logic avoids motion interference between components, ensures the complete construction of the circular cross-section cam structure, and improves the reliability and lifespan of the mechanism.

[0035] Combination Figures 2-3 and Figure 9 As shown, in this embodiment, the idler assembly also includes a transverse support 22, which is fixedly connected to the inner walls of both sides of the conveyor frame 1. Vertical supports 221 are fixedly connected to both ends of the transverse support 22. Limiting holes 222 are opened on the upper surface of the transverse support 22. The hydraulic component consists of two hydraulic rods 23, which are respectively fixedly connected to the vertical supports 221. Each vertical support 221 is slidably fitted with an adjusting ring 2211, and the adjusting ring 2211 is fixedly connected to the output end of the hydraulic rod 23. A fixing ring 2212 with a pin is sleeved inside the adjusting ring 2211. An inner ring groove is arranged on the inner wall of the adjusting ring 2211, and the pin on the fixing ring 2212 is inserted into the inner ring groove. In the roller assembly modules 21 at both ends, the drive shaft 212 is sleeved inside the fixing ring 2212 through a bearing.

[0036] The universal ball joint component, serving as the core coupling structure for power transmission and angle adaptation between modules, consists of a ball seat and a universal ball head. In two adjacent roller shaft modules 21, the ball seat and universal ball head are respectively fixedly installed at opposite ends of the two drive shafts 212 and mesh with each other to form a spherical joint connection. Specifically, the universal ball joint component has a dual function: firstly, power transmission; when any roller shaft module 21 is driven to rotate, the torque is transmitted to the universal ball joint component through the drive shaft 212, and through the meshing linkage of the ball seat and the universal ball head, it drives... The remaining roller assembly modules 21 rotate synchronously to ensure the power continuity of the entire conveying line; secondly, the adaptive deflection function, when several roller assembly modules 21 undergo spatial displacement (from a straight state to an arc shape) under the push of hydraulic components and telescopic components, through the multi-directional swing cooperation between the ball seat and the universal ball head, can adapt to the angle change generated between adjacent transmission shafts 212, while ensuring continuous power transmission, avoiding additional bending moment and jamming caused by axis misalignment, thereby ensuring that the roller assembly module 21 can still operate smoothly in a bent state.

[0037] Combination Figures 5-6 and Figure 9 As shown, in this embodiment, the telescopic component includes several movable seats 24. Each movable seat 24 has a fixedly connected insert plate 241 on its upper surface. The insert plate 241 is slidably fitted with an insert shell 242. It is worth noting that the insert plate 241 has a protruding structure on its surface, while the insert shell 242 has a concave structure inside, forming a stepped structure. Several movable seats 24 are slidably adapted to the transverse support 22, and the roller shaft group module 21 is located between two adjacent roller shaft group modules 21. The drive shaft 212 is inserted into the fixing hole arranged on the insert shell 242. Each fixing hole is fitted with a limit ring 25. The inner wall of the limit ring 25 is arranged with an inner groove. The limit ring 25 is fitted with a drive ring 251 with a pin inside, and the pin on the drive ring 251 is inserted into the inner groove.

[0038] This invention establishes a flexible connection between adjacent drive shafts 212 by setting a universal ball joint component. This ensures that when any roller shaft module 21 is driven by the drive motor, the torque can be transmitted to the other modules through the spherical pair meshing (power continuity). It also allows adjacent modules to adapt to changes in included angle when spatial bending occurs (angle adaptability). Combined with the stepped sliding structure formed by the insert plate 241 and the insert shell 242 on the moving seat 24, and the circumferential positioning of the limiting ring 25 and the drive ring 251, the entire roller shaft mechanism 2 maintains the coaxiality and synchronization between the modules when it expands and contracts with the conveyor frame 1, avoiding the risk of jamming or belt breakage caused by axial misalignment.

[0039] Working Principle: This embodiment provides a retractable belt conveyor. During operation, the drive motor in the drive cabinet 11 outputs torque, which drives the roller mechanism 2 located in the middle of the conveyor frame 1 to rotate at high speed through the transmission chain, thereby driving the conveyor belt 3 wound on it to transport materials. When it is necessary to adjust the conveying mode to adapt to different working conditions, the hydraulic rod 23 arranged on the horizontal support 22 is activated, and its output end pushes the adjusting ring 2211 to move downward along the vertical support 221. The adjusting ring 2211 is connected to the fixed ring 2212 through its inner ring groove. The pin engagement drives the drive shaft 212, which is inserted into the fixed ring 2212, to move axially. At this time, the universal ball joint component between adjacent drive shafts 212 oscillates adaptively through the spherical pair, ensuring continuous power transmission while allowing relative angular deflection of adjacent roller shaft modules 21, thus avoiding jamming caused by axial misalignment. In the initial stage of the inward movement of the drive shaft 212, the telescopic rod 2151 on the first sliding seat 215 is first compressed to its extreme point, and then pushes the first sliding seat 215 to slide along the slide groove 2121, which is amplified by the multi-link assembly. After the process, several first assembly blocks 213 are forced to expand radially outward. When the first assembly blocks 213 are in place, the boss of the stepped rod 2161 on the second sliding seat 216 passes through the stepped hole 2111 on the end face of the roller shaft 211, causing the second sliding seat 216 to be pushed by the inner wall of the roller shaft 211 and move axially. Then, through another set of multi-link groups, several second assembly blocks 214 are forced to make axial clearance movement first, and then expand radially outward, thus forming a complete circle between the two roller shafts 211 together with the first assembly blocks 213. The cam structure with a wavy cross section controls several roller shaft modules 21 to alternately be in an unfolded or converged state along the conveying direction. The conveyor belt 3 is forced to form a wavy cross section by the periodic compression of the cam structure. At the same time, the step sliding structure of the insert plate 241 and the insert shell 242 on the moving seat 24 realizes the extension and retraction adjustment of the length of the whole machine. The centripetal force of the arc cross section is used to gather the material towards the middle to prevent spillage. The difference between the peaks and troughs of the wavy cross section forms a multi-point resistance limit for large pieces of material, realizing the efficient and stable operation of the whole machine under variable amplitude conditions.

[0040] The embodiments disclosed in this invention are preferred embodiments, but are not limited thereto. Those skilled in the art can easily understand the spirit of this invention based on the above embodiments and make different extensions and variations, but as long as they do not depart from the spirit of this invention, they are all within the protection scope of this invention.

Claims

1. A scalable belt conveyor, characterized by, It includes a conveyor frame (1) with a telescopic structure, a drive cabinet (11) arranged on one side of the conveyor frame (1), and a roller mechanism (2) arranged on the conveyor frame (1). The roller mechanism (2) includes several sets of idler roller assemblies arranged sequentially along the conveying direction; The idler assembly includes at least three roller shaft modules (21), and two adjacent roller shaft modules (21) are connected by a universal ball joint component, so that the modules can maintain linkage and adapt to angle deflection. By means of the output end of the hydraulic component and the telescopic components arranged at both ends of each roller group module (21), a directional force is applied to the roller group module (21) located at the two ends. Under the force, the roller group module (21) located at the two ends, together with the remaining roller group module (21) in the middle, undergo a coordinated displacement, causing the roller group module (21) in the straight state to bend into an arc shape. The roller assembly module (21) includes two cylindrical components and a combined component arranged between the cylindrical components that can move axially or radially along the cylindrical components; When the composite component expands radially, it forms a cam structure between the two cylindrical components; When several roller group modules (21) unfold or gather in sequence, the conveyor belt (3) is subjected to periodic compression of the contour, and its transverse cross section is wavy.

2. A retractable belt conveyor according to claim 1, characterized in that Each roller assembly module (21) includes two roller shafts (211). Each roller shaft (211) has stepped holes (2111) arranged in a ring array on one side. Each roller shaft (211) has a drive shaft (212) slidably fitted inside. Each drive shaft (212) has several grooves (2121) arranged in a ring array on its surface. The grooves (2121) are adapted to the inner wall of the roller shaft (211). Each drive shaft (212) has several first assembly blocks (213) and several second assembly blocks (214) arranged in a ring array on its surface.

3. A retractable belt conveyor according to claim 2, characterised in that, A plurality of the first combination blocks (213) and a plurality of the second combination blocks (214) together constitute a combination component.

4. A retractable belt conveyor according to claim 3, characterised in that A plurality of the first combination blocks (213) and a plurality of the second combination blocks (214) are each radially positioned corresponding to a plurality of the grooves (2121); In the two roller shafts (211), several first assembly blocks (213) are fixedly connected to each other.

5. A retractable belt conveyor according to claim 4, characterised in that Each of the drive shafts (212) has a plurality of first sliding seats (215) and a plurality of second sliding seats (216) arranged in a ring array on its surface. The first sliding seats (215) correspond to the radial positions of the first assembly block (213), and the second assembly block (214) corresponds to the radial positions of the second sliding seats (216).

6. A conveyor as claimed in claim 5, wherein, A plurality of first sliding seats (215) and a plurality of second sliding seats (216) are slidably adapted inside the slide groove (2121). The second combined block (214) corresponding to the radial position is hinged to the first sliding seat (215) through a multi-link group. The second combined block (214) corresponding to the radial position is hinged to the second sliding seat (216) through a multi-link group.

7. A retractable belt conveyor according to claim 6, characterised in that Each of the second sliding seats (216) is fixedly connected to a step rod (2161) at one end, and the step rod (2161) is inserted into the step hole (2111). Each of the first sliding seats (215) is fixedly connected to a telescopic rod (2151) at one end, and the mounting seat of the telescopic rod (2151) is fixedly connected to the inner wall of one side of the roller shaft (211).

8. A conveyor as claimed in claim 7, wherein, The idler assembly also includes a transverse support (22), which is fixedly connected to the inner walls on both sides of the conveyor frame (1). Both ends of the transverse support (22) are fixedly connected to vertical supports (221), and limit holes (222) are opened on the upper surface of the transverse support (22).

9. A retractable belt conveyor according to claim 8, characterized in that The hydraulic component consists of two hydraulic rods (23), which are fixedly connected to the vertical support (221). Each vertical support (221) is fitted with an adjusting ring (2211), which is fixedly connected to the output end of the hydraulic rod (23). A fixing ring (2212) with a pin is fitted inside the adjusting ring (2211). The inner wall of the adjusting ring (2211) is provided with an inner ring groove, and the pin on the fixing ring (2212) is inserted into the inner ring groove. In the roller group module (21) at the two ends, the transmission shaft (212) is fitted inside the fixing ring (2212) through a bearing.

10. A scalable belt conveyor according to claim 9, characterized in that The telescopic component includes several movable seats (24), each movable seat (24) has a fixed plate (241) on its upper surface, and a shell (242) is slidably sleeved on the surface of the plate (241). Several movable seats (24) are slidably adapted to the transverse support (22), and the roller group module (21) is located between two adjacent roller group modules (21). The drive shaft (212) is inserted into a fixing hole arranged on the housing (242). Each fixing hole is fitted with a limiting ring (25). The inner wall of the limiting ring (25) is provided with an inner groove. A drive ring (251) with a pin is fitted inside the limiting ring (25), and the pin on the drive ring (251) is inserted into the inner groove.

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