A retractable conveyor belt

Abstract

The present invention belongs to the technical field of conveyor belt equipment, and specifically is a retractable conveyor belt, comprising a mounting frame, a retractable frame and a conveyor belt body; the retractable frame is mounted on the mounting frame, and the conveyor belt body is sleeved and mounted on the retractable frame; it also comprises a retractable assembly, the retractable assembly is mounted on the retractable frame, and the retractable assembly is used to adjust the length of the retractable frame; the present invention arranges a support member, an extension member and a guide groove, and during the unfolding process of the retractable frame, the assembly plates constituting the extension member move along the guide groove, and under the guidance of the guide groove, the assembly plates are flush with the support member one by one, and then under the action of the support member and the extension member, stable support is provided for the transport part of the conveyor belt body, and at the same time, due to the limitation of the guide groove and the support of the guide plate, the assembly plate flush with the support member transmits gravity to the guide plate, and transmits it to the fixed seat and the extension seat through the guide plate, thereby effectively enhancing the bearing capacity of the equipment.

Description

Technical Field

[0001] The invention belongs to the technical field of conveyor belt equipment, in particular to a telescopic conveyor belt. Background Art

[0002] A telescopic conveyor belt refers to a conveying mechanism that can be extended or shortened in length. Since the telescopic conveyor belt can adjust its transportation distance according to actual needs during actual use, it has good application prospects in many fields.

[0003] Most of the existing telescopic conveyor belts realize the expansion and contraction of the overall length of the support frame through the relative movement of the support frame. Therefore, the support frame is usually designed as a multi-section hollow pipe column structure that is sleeved on each other. When the telescopic conveyor belt is in a contracted state, the multi-section hollow pipe column structure is sleeved in sequence, and the conveyor belt body moves from the top surface of the hollow pipe column at the top. At this time, the top surfaces of the multi-section hollow pipe columns are sequentially fitted and superimposed, and the support force for the conveyor belt body is the strongest. When the multi-section hollow pipe columns produce relative movement, resulting in a decrease in the overlap, the multi-section hollow pipe columns only rely on their own top surfaces to support the conveyor belt body. Moreover, since the sizes of the multi-section hollow pipe columns are reduced in sequence, This causes the top surfaces of multiple hollow tube columns to be arranged in a step-shaped manner. On the one hand, the thickness of the top surface of a single hollow tube column is relatively small, which reduces the supporting strength of the conveyor belt body. When transporting heavy objects, it is easy to cause the top surface of the hollow tube column to deform, thereby causing the telescopic conveyor belt to malfunction. On the other hand, when the conveyor belt is in a tightened state, the top surface of the hollow tube column arranged in a step-shaped manner has a low degree of fit with the conveyor belt body, resulting in a reduction in the supporting effect of the top surface of the hollow tube column on the conveyor belt body. As the wall thickness of the hollow tube column itself increases, the step-shaped distribution height difference of the top surface of the hollow tube column increases. During long-term use, it is easy to cause the conveyor belt body to be deformed due to stress.

[0004] The related technology discloses a telescopic conveyor that is easy to adjust the belt length, with application number 2021110478236. When in use, this solution uses electric push rods at different positions to push the fixed frame and the connecting frame out from the inside of the support frame, and adjusts the length according to the required use. While adjusting, the conveyor belt rolled up on the adjustment device is loosened to meet the length of the connecting frame and the fixed frame, which is convenient for adjustment. However, in actual use, it is found that although this solution can realize the extension and retraction of the conveyor belt length, it lacks support for the conveyor belt body. Not only is the load-bearing capacity poor, but also during long-term use, the conveyor belt is prone to deformation, dislocation and other problems.

[0005] In view of this, the present invention proposes a retractable conveyor belt to solve the above technical problems. Summary of the invention

[0006] In order to make up for the deficiencies of the prior art and solve the above-mentioned technical problems, the present invention proposes a retractable conveyor belt.

[0007] The technical solution adopted by the present invention to solve the technical problem is: a telescopic conveyor belt described in the present invention comprises a mounting frame, a telescopic frame and a conveyor belt body;

[0008] The mounting frame is a frame-type structure, the telescopic frame is mounted on the mounting frame, and the conveyor belt body is sleeve-mounted on the telescopic frame;

[0009] It also includes a telescopic assembly, which is mounted on the telescopic frame and is used to adjust the length of the telescopic frame;

[0010] The telescopic frame at least comprises a fixed seat, an extension seat and an end seat, wherein the fixed seat is fixedly mounted on the mounting frame body, the fixed seat, the extension seat and the end seat are all C-shaped structures with openings facing upwards, and the fixed seat, the extension seat and the end seat are slidably sleeved in sequence;

[0011] The telescopic assembly includes a first guide roller and a second guide roller, wherein the first guide roller is respectively mounted on a fixed seat, an extension seat and an end seat away from an end of the mounting frame, and the second guide roller fixed seat, an extension seat and an end seat are close to an end of the mounting frame, and the first guide roller and the second guide roller are used to guide the extension path of the conveyor belt body;

[0012] A driving roller, wherein the driving roller is rotatably mounted on a fixed frame, the conveyor belt body is sleeved on the first guide roller, the second guide roller and the driving roller, and the driving roller is externally connected to a driving motor;

[0013] A support member and an extension member, wherein the support member is fixedly mounted on the end seat, and the extension member is movably mounted in the fixed seat and the extension seat. In an initial state, part of the extension member is flush with the support member, and part of the extension member is located below the support member. As the extension member is deployed to an increased extent, the portion of the extension member flush with the support member gradually increases.

[0014] A driving assembly is installed on the telescopic frame, and is used to drive the telescopic frame and the extension piece.

[0015] Preferably, the extension piece is composed of a plurality of assembly plates, and the fixed seat and the extension seat are both fixedly installed with symmetrically designed guide plates, the guide plates are provided with guide grooves, the guide plates and the guide grooves are both C-shaped structures, and the plurality of guide plates are staggered in the width direction of the telescopic frame, and the extension piece is slidably installed in the guide grooves.

[0016] Preferably, the driving assembly comprises a driving belt, the fixed seat and the extension seat are both rotatably installed with the driving belt, the driving belt is composed of an annular belt body, and the driving belt extends along the length direction of the fixed seat and the extension seat;

[0017] Connecting piece, the extension seat and the end seat are both fixedly mounted with connecting pieces at one end close to the fixed seat, and the connecting pieces are fixedly connected to the corresponding driving belt;

[0018] A pushing member is fixedly mounted on the driving belt, the pushing member extends away from one end of the driving belt into the guide groove, and the assembly plate is located on the movement path of the pushing member.

[0019] Preferably, two adjacent assembly plates are commonly mounted with adjustment plates, each of the adjustment plates is provided with an adjustment slot, and both ends of the assembly plates extend into the adjustment slot.

[0020] Preferably, the cross-section of the assembly plates is designed to be conical, and the smallest end of the cone is far away from the conveyor belt body.

[0021] Preferably, a filling plate is fixedly mounted on both the fixing seat and the extending seat, and the filling plate is used to fill the gap between two adjacent extension members, and the upper surface of the filling plate is designed to be flush with the upper surface of the supporting member.

[0022] Preferably, a plurality of reinforcing rods are hingedly mounted on the guide plate, the reinforcing rods are located in an inner cavity of the C-shaped structure of the guide plate, and the length of the reinforcing rods is the same as the height of the inner cavity of the C-shaped structure of the guide plate.

[0023] Preferably, the reinforcing rod is hingedly connected to the guide plate via a torsion spring.

[0024] Preferably, evenly distributed baffles are fixedly mounted on the bottom end of the inner cavity of the C-shaped structure of the guide plate, and the baffles are located on the rotation path of the reinforcing rod.

[0025] The beneficial effects of the present invention are as follows:

[0026] 1. A telescopic conveyor belt described in the present invention, by setting a support member, an extension member and a guide groove, during the expansion of the telescopic frame, the assembly plate constituting the extension member moves along the guide groove, and under the guidance of the guide groove, the assembly plates are flush with the support member one by one, and then under the action of the support member and the extension member, a stable support is provided for the transportation part of the conveyor belt body. At the same time, due to the limitation of the guide groove and the support of the guide plate, the assembly plate flush with the support member transmits gravity to the guide plate, and transmits it to the fixed seat and the extension seat through the guide plate, thereby effectively enhancing the carrying capacity of the equipment. At the same time, it should be known that in the present invention, the guide groove and the extension member are both set to multiple, and correspond to the fixed seat and the extension seat, so that the extension member is dispersed between the fixed seat and the extension seat, and the gap between the fixed seat and the extension seat is fully utilized, so that the volume of the telescopic conveyor belt is compressed, and at the same time, during the extension and retraction of the telescopic frame, multiple extension members move simultaneously, and the movement speed is adapted to the extension and retraction speed of the telescopic frame, so that the equipment runs more smoothly.

[0027] 2. The telescopic conveyor belt described in the present invention is controlled by a driving belt at the same time because the extension and retraction of the telescopic frame and the movement of the extension piece are controlled by a driving belt. On the one hand, the extension and retraction of the extension piece and the telescopic frame are kept consistent, thereby reducing the probability of equipment failure. On the other hand, the simplification of the driving components makes the structure of the telescopic conveyor belt simpler, thereby reducing the difficulty of manufacturing and assembling the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The present invention will be further described below in conjunction with the accompanying drawings.

[0029] Figure 1 is a stereogram of the present invention;

[0030] Figure 2 It is a three-dimensional diagram of the assembly of the telescopic frame, the support member and the extension member of the present invention;

[0031] Figure 3 It is a three-dimensional diagram of the telescopic frame;

[0032] Figure 4 It is a three-dimensional diagram of the assembly of the conveyor belt body, the first guide roller and the second guide roller;

[0033] Figure 5 is a stereogram of the drive assembly;

[0034] Figure 6 It is a partial stereogram of the extension piece;

[0035] Figure 7 is a three-dimensional diagram of the guide plate;

[0036] Figure 8 yes Figure 7 A partial enlarged view of the middle A;

[0037] Fig. 9 It is a partial stereogram of the reinforcing rod;

[0038] Fig.10 is a partial cross-sectional view of the present invention;

[0039] In the figure: 1. mounting frame; 11. conveyor belt body; 2. telescopic frame; 21. fixed seat; 22. extension seat; 23. end seat; 24. first guide roller; 25. second guide roller; 26. driving roller; 27. supporting member; 3. extension member; 31. assembly plate; 4. guide plate; 41. guide groove; 42. driving belt; 43. connecting member; 44. pushing member; 5. adjusting plate; 51. adjusting groove; 52. filling plate; 6. reinforcing rod; 61. torsion spring; 62. baffle. DETAILED DESCRIPTION

[0040] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0041] like Figures 1 to 10 As shown, a telescopic conveyor belt according to the present invention comprises a mounting frame 1, a telescopic frame 2 and a conveyor belt body 11;

[0042] The mounting frame 1 is a frame-type structure, the telescopic frame 2 is mounted on the mounting frame 1, and the conveyor belt body 11 is sleeved and mounted on the telescopic frame 2;

[0043] It also includes a telescopic assembly, which is mounted on the telescopic frame 2 and is used to adjust the length of the telescopic frame 2;

[0044] The telescopic frame 2 at least includes a fixed seat 21, an extension seat 22 and an end seat 23. The fixed seat 21 is fixedly mounted on the mounting frame 1. The fixed seat 21, the extension seat 22 and the end seat 23 are all C-shaped structures with openings facing upwards. The fixed seat 21, the extension seat 22 and the end seat 23 are slidably sleeved in sequence.

[0045] The telescopic assembly includes a first guide roller 24 and a second guide roller 25. The first guide roller 24 is respectively mounted on the fixed seat 21, the extension seat 22 and the end seat 23 at one end away from the mounting frame 1, and the second guide roller 25 is fixed on the fixed seat 21, the extension seat 22 and the end seat 23 at one end close to the mounting frame 1. The first guide roller 24 and the second guide roller 25 are used to guide the extension path of the conveyor belt body 11;

[0046] A driving roller 26, wherein the driving roller 26 is rotatably mounted on a fixed frame, the conveyor belt body 11 is sleeved on the first guide roller 24, the second guide roller 25 and the driving roller 26, and the driving roller 26 is externally connected to a driving motor;

[0047] The support member 27 and the extension member 3, wherein the support member 27 is fixedly mounted on the end seat 23, and the extension member 3 is movably mounted in the fixed seat 21 and the extension seat 22. In the initial state, part of the extension member 3 is flush with the support member 27, and part of the extension member 3 is located below the support member 27. As the extension frame 2 is deployed to an increased extent, the portion of the extension member 3 flush with the support member 27 gradually increases.

[0048] A driving assembly, the driving assembly is installed on the telescopic frame 2, and the driving assembly is used to drive the telescopic frame 2 and the extension member 3;

[0049] The extension piece 3 is composed of a plurality of assembly plates 31. A symmetrically designed guide plate 4 is fixedly installed in the fixed seat 21 and the extension seat 22. A guide groove 41 is provided on the guide plate 4. Both the guide plate 4 and the guide groove 41 are C-shaped structures. The plurality of guide plates 4 are staggered along the width direction of the telescopic frame 2. The extension piece 3 is slidably installed in the guide groove 41.

[0050] When a conveyor belt is used to transport objects, the weight of the objects acts on the conveyor belt body 11. Since the conveyor belt body 11 is mostly made of flexible materials, its bearing capacity is poor, and a structure for bearing weight needs to be provided separately. When a telescopic conveyor belt is used, its structure for bearing weight also needs to have telescopic ability. In order to overcome the problems of inconsistent height and poor flatness of the traditional telescopic structure, the present invention improves the telescopic assembly, so that the surface of the structure for bearing weight is flat and there is no height difference before and after telescoping.

[0051] Specifically, the telescopic conveyor belt provided in the present invention includes a mounting frame 1, a telescopic frame 2 and a conveyor belt body 11, wherein the mounting frame 1 is used to provide a mounting base for the telescopic frame 2, and the mounting frame 1 includes the electrical structure of the telescopic conveyor belt, external loading accessories, etc., and the telescopic frame 2 is the main body of the telescopic conveyor belt, and the telescopic frame 2 is composed of a fixed seat 21, an extension seat 22 and an end seat 23, wherein the fixed seat 21 and the end seat 23 are respectively located at the head and tail ends of the telescopic frame 2, and the number of the extension seat 22 is at least one, and is located between the fixed seat 21 and the end seat 23, and the three are slidably connected in a sequentially sleeved relationship, and the telescopic component installed on the telescopic frame 2 is used to adjust the length of the conveyor belt body 11 on the one hand, so that the conveyor belt body The body 11 is always kept in a taut state. On the other hand, the telescopic assembly also includes a support member 27 and an extension member 3 for bearing weight. The support member 27 is a plate-like structure with a fixed length, and the extension member 3 is composed of multiple parts. In the initial state, a part of the extension member 3 is flush with the support member 27, and together they support the conveyor belt body 11, thereby facilitating the conveyor belt body 11 to transport objects, while the other part of the extension member 3 is located below the support member 27. When the extension seat 22 or the end seat 23 moves compared to the fixed seat 21, the length of the telescopic frame 2 increases. As the length of the telescopic frame 2 increases, the transportation distance of the telescopic frame 2 increases. At this time, since the conveyor belt body 11 is annular and the conveyor belt body 11 is located below the support member 27, It is guided by the first guide roller 24 and the second guide roller 25. When the length of the telescopic frame 2 changes, the distance between the multiple first guide rollers 24 and the second guide rollers 25 changes, but the length of the extension path of the conveyor belt body 11 formed by the multiple first guide rollers 24, the second guide rollers 25 and the driving roller 26 remains unchanged. Therefore, when the extension path of the conveyor belt body 11 is changed, its tension remains unchanged. At the same time, under the action of the driving roller 26 assembly, the part of the extension member 3 located below the support member 27 moves upward, causing the part of the extension member 3 flush with the support member 27 to gradually increase, thereby increasing the length of the support structure for the conveyor belt body 11, forming a stable support for the conveyor belt body 11, and During the specific movement of the extension member 3, since the extension member 3 is composed of a plurality of assembly plates 31, and the assembly plates 31 all extend into the guide grooves 41 provided on the guide plates 4, when the driving assembly drives the extension member 3, the assembly plates 31 slide along the guide grooves 41. Since the guide grooves 41 are designed in a C-shape, and when the fixed seat 21 and the extension seat 22 are not fully opened, the plurality of guide plates 4 influence each other, causing the guide grooves 41 to be partially unfolded, and the unfolded portion thereof is the same as the growth distance of the telescopic frame 2. Therefore, as the telescopic frame 2 continues to extend, the unfolded portion of the guide grooves 41 increases, and the length of the portion of the extension member 3 flush with the support member 27 increases, so that the support structure composed of the support member 27 and the extension member 3 always keeps corresponding to the length of the telescopic frame 2.

[0052] The present invention provides the support member 27, the extension member 3 and the guide groove 41. During the unfolding process of the telescopic frame 2, the assembly plate 31 constituting the extension member 3 moves along the guide groove 41. Under the guidance of the guide groove 41, the assembly plates 31 are aligned with the support member 27 one by one. Then, under the action of the support member 27 and the extension member 3, a stable support is provided for the transport portion of the conveyor belt body 11. At the same time, due to the restriction of the guide groove 41 and the support of the guide plate 4, the assembly plate 31 aligned with the support member 27 transmits the gravity to the guide plate 4, and transmits it to the fixed seat 21, the extension member 3 and the guide plate 4 through the guide plate 4. The extension seat 22 effectively enhances the carrying capacity of the equipment. At the same time, it should be noted that in the present invention, the guide groove 41 and the extension member 3 are both set in multiple numbers, and correspond to the fixed seat 21 and the extension seat 22. Therefore, the extension member 3 is dispersed between the fixed seat 21 and the extension seat 22, and the gap between the fixed seat 21 and the extension seat 22 is fully utilized, so that the volume of the telescopic conveyor belt can be compressed. At the same time, during the extension and retraction process of the telescopic frame 2, multiple extension members 3 move at the same time, and the movement speed is adapted to the extension and retraction speed of the telescopic frame 2, so that the equipment can run more smoothly.

[0053] As a preferred embodiment of the present invention, the driving assembly includes a driving belt 42, and the driving belt 42 is rotatably installed in the fixed seat 21 and the extension seat 22, and the driving belt 42 is composed of an annular belt body, and the driving belt 42 extends along the length direction of the fixed seat 21 and the extension seat 22;

[0054] A connecting member 43, wherein the extending seat 22 and the end seat 23 are both fixedly mounted with a connecting member 43 at one end close to the fixed seat 21, and the connecting member 43 is fixedly connected to the corresponding driving belt 42;

[0055] A pushing member 44 is fixedly mounted on the driving belt 42 . The pushing member 44 extends into the guide groove 41 away from one end of the driving belt 42 . The assembly plate 31 is located on the movement path of the pushing member 44 .

[0056] In this embodiment, a driving belt 42 is used as a driving member to drive the telescopic frame 2 and the extension member 3 at the same time. Specifically, under the action of an external power source, the driving belt 42 rotates. Since the driving belt 42 is composed of an annular belt body and extends along the length direction of the fixed seat 21 and the extension seat 22, during the operation of the driving belt 42, the connecting member 43 and the pushing member 44 fixedly installed on the driving belt 42 move, and the connecting member 43 is fixedly connected to the extension seat 22 and the end seat 23. Therefore, the movement of the connecting member 43 drives the fixed seat 21, the extension seat 22 and the end seat 23 constituting the telescopic frame 2 to produce relative displacement, thereby causing the telescopic frame 2 to produce a telescopic movement, and the pushing member 44 extends. The plurality of assembly plates 31 extend into the guide groove 41, and the assembly plates 31 are all located on the movement path of the pushing member 44. Therefore, when the pushing member 44 moves, the plurality of assembly plates 31 in the guide groove 41 are pushed simultaneously, thereby causing the extension member 3 composed of the plurality of assembly plates 31 to move. As the movement distance of the extension member 3 increases, the number of assembly plates 31 flush with the support member 27 gradually increases. In the present invention, the extension and retraction of the telescopic frame 2 and the movement of the extension member 3 are controlled by the driving belt 42 at the same time. On the one hand, the extension and retraction of the extension member 3 and the telescopic frame 2 are kept consistent, thereby reducing the probability of equipment failure. On the other hand, the simplification of the driving component makes the structure of the telescopic conveyor belt simpler, thereby reducing the difficulty of manufacturing and assembling the equipment.

[0057] As a preferred embodiment of the present invention, an adjustment sheet 5 is installed on two adjacent assembly plates 31, and an adjustment slot 51 is opened on each of the adjustment sheets 5. Both ends of the assembly plates 31 extend into the adjustment slot 51.

[0058] The cross section of the assembly plate 31 is designed to be conical, and the smallest end of the cone is far away from the conveyor belt body 11;

[0059] An adjusting piece 5 is used to connect two adjacent assembly plates 31, so that the multiple assembly plates 31 form a whole, and the setting of the adjusting groove 51 enables the distance between the assembly plates 31 forming a whole to be adjusted. Combined with the conical design of the assembly plates 31, when the assembly plates 31 move along the guide groove 41, the deformation ability of the extension member 3 composed of the assembly plates 31 can be effectively enhanced, so that the movement difficulty of the extension member 3 is reduced. At the same time, under the pushing action of the pushing member 44, the multiple assembly plates 31 are flush and kept in contact, so that the gap of the extension member 3 supporting the conveyor belt body 11 is reduced, thereby enhancing the supporting effect on the conveyor belt body 11.

[0060] As a preferred embodiment of the present invention, a filling plate 52 is fixedly mounted on both the fixing seat 21 and the extension seat 22. The filling plate 52 is used to fill the gap between two adjacent extension members 3. The upper surface of the filling plate 52 is designed to be flush with the upper surface of the support member 27.

[0061] Due to the shape of the guide groove 41 and the limitation of the deformation ability of the extension member 3, there is a gap between two adjacent extension members 3. At this time, the setting of the filling plate 52 can increase the tightness of the connection between the multiple extension members 3 and the support member 27, thereby enhancing the supporting effect on the conveyor belt body 11 and reducing the probability of deformation of the conveyor belt body 11 during transportation.

[0062] As a preferred embodiment of the present invention, a plurality of reinforcing rods 6 are hingedly mounted on the guide plate 4 , and the reinforcing rods 6 are located in the inner cavity of the C-shaped structure of the guide plate 4 . The length of the reinforcing rods 6 is the same as the height of the inner cavity of the C-shaped structure of the guide plate 4 .

[0063] The reinforcing rod 6 is hingedly connected to the guide plate 4 via a torsion spring 61;

[0064] The bottom end of the inner cavity of the C-shaped structure of the guide plate 4 is fixedly mounted with evenly distributed baffles 62 , and the baffles 62 are located on the rotation path of the reinforcing rod 6 .

[0065] In order to enhance the force conduction and support strength of the C-shaped guide plate 4, a reinforcing rod 6 is provided. When the telescopic frame 2 is in a retracted state, the reinforcing rod 6 is restricted by the extension seat 22 and the end seat 23 and is in a horizontal state. At this time, the torsion spring 61 is in a compressed state. When the telescopic frame 2 is extended, as the extension amount gradually increases, the reinforcing rod 6 loses its restriction one by one. Under the action of the torsion spring 61 and gravity, the reinforcing rod 6 deflects. After the deflection, the reinforcing rod 6 is restricted by the baffle 62. At this time, the reinforcing rod 6 is in a vertical state. The reinforcing rod 6 is used to support and conduct force to the C-shaped inner cavity of the guide plate 4, thereby effectively enhancing the force conduction and support effects of the guide plate 4.

[0066] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A telescopic conveyor belt, comprising a mounting frame (1), a telescopic frame (2) and a conveyor belt body (11); The mounting frame (1) is a frame-type structure, the telescopic frame (2) is mounted on the mounting frame (1), and the conveyor belt body (11) is sleeved and mounted on the telescopic frame (2); Features: It also comprises a telescopic assembly, the telescopic assembly being mounted on the telescopic frame (2), and the telescopic assembly being used to adjust the length of the telescopic frame (2); The telescopic frame (2) at least comprises a fixed seat (21), an extension seat (22) and an end seat (23); the fixed seat (21) is fixedly mounted on the mounting frame body (1); the fixed seat (21), the extension seat (22) and the end seat (23) are all C-shaped structures with openings facing upward; the fixed seat (21), the extension seat (22) and the end seat (23) are slidably sleeved in sequence; The telescopic assembly comprises a first guide roller (24) and a second guide roller (25), wherein the first guide roller (24) is respectively mounted on a fixed seat (21), an extension seat (22) and an end seat (23) at an end away from the mounting frame (1), and the second guide roller (25) is mounted on a fixed seat (21), an extension seat (22) and an end seat (23) at an end close to the mounting frame (1), and the first guide roller (24) and the second guide roller (25) are used to guide the extension path of the conveyor belt body (11); A driving roller (26), wherein the driving roller (26) is rotatably mounted on a fixed frame, the conveyor belt body (11) is sleeved on a first guide roller (24), a second guide roller (25) and the driving roller (26), and the driving roller (26) is externally connected to a driving motor; A support member (27) and an extension member (3), wherein the support member (27) is fixedly mounted on the end seat (23), and the extension member (3) is movably mounted in the fixed seat (21) and the extension seat (22); in an initial state, part of the extension member (3) is flush with the support member (27), and part of the extension member (3) is located below the support member (27); as the extension member (2) is expanded to an increased extent, the part of the extension member (3) flush with the support member (27) gradually increases; A driving assembly, the driving assembly being mounted on the telescopic frame (2), and the driving assembly being used to drive the telescopic frame (2) and the extension member (3); The extension piece (3) is composed of a plurality of assembly plates (31), and a symmetrically designed guide plate (4) is fixedly installed in the fixed seat (21) and the extension seat (22), and a guide groove (41) is provided on the guide plate (4). The guide plate (4) and the guide groove (41) are both C-shaped structures, and the plurality of guide plates (4) are staggered along the width direction of the telescopic frame (2), and the extension piece (3) is slidably installed in the guide groove (41); The driving assembly comprises a driving belt (42), the driving belt (42) is rotatably installed in the fixed seat (21) and the extension seat (22), the driving belt (42) is composed of an annular belt body, and the driving belt (42) extends along the length direction of the fixed seat (21) and the extension seat (22); A connecting member (43), wherein the extending seat (22) and the end seat (23) are both fixedly mounted with a connecting member (43) at one end close to the fixed seat (21), and the connecting member (43) is fixedly connected to the corresponding driving belt (42); A pushing member (44), wherein the driving belt (42) is also fixedly mounted with the pushing member (44), the pushing member (44) extends into the guide groove (41) away from one end of the driving belt (42), and the assembly plate (31) is located on the movement path of the pushing member (44); An adjustment sheet (5) is commonly mounted on two adjacent assembly plates (31), each of the adjustment sheets (5) is provided with an adjustment slot (51), and both ends of the assembly plates (31) extend into the adjustment slot (51); The cross section of the assembly plate (31) is designed to be conical, and the smallest end of the cone is far away from the conveyor belt body (11); A plurality of reinforcing rods (6) are hingedly mounted on the guide plate (4), the reinforcing rods (6) are located in the inner cavity of the C-shaped structure of the guide plate (4), and the length of the reinforcing rods (6) is the same as the height of the inner cavity of the C-shaped structure of the guide plate (4); The reinforcing rod (6) is hingedly connected to the guide plate (4) via a torsion spring (61); The bottom end of the C-shaped inner cavity of the guide plate (4) is fixedly mounted with evenly distributed baffles (62), and the baffles (62) are located on the rotation path of the reinforcing rod (6).

2. A retractable conveyor belt according to claim 1, characterized in that: A filling plate (52) is fixedly mounted on both the fixed seat (21) and the extension seat (22). The filling plate (52) is used to fill the gap between two adjacent extension members (3). The upper surface of the filling plate (52) is designed to be flush with the upper surface of the support member (27).

Images