Speed chain conveying device

Abstract

The invention relates to the technical field of conveying devices, in particular to a speed chain conveying device which comprises a rack, two fixing shells are fixedly connected to the outer wall of the top of the rack, connecting shafts are rotatably connected to the interiors of the fixing shells, and chain wheels are fixedly connected to the positions, located in the fixing shells, of the outer walls of the connecting shafts. The outer wall of the chain wheel is connected with a speed multiplication chain in an engaged mode. A first reset spring and a second reset spring move upwards a first mounting plate and a second mounting plate at the same time, so that a first rotating sleeve can push the speed chain to move upwards, the tensioning force of the speed chain is released, and the situation that when the speed chain is in an over-tight state, tensioning mechanism adjustment is not conducted on the speed chain in time, and the chain is broken is avoided. Correspondingly, the double-speed chain is released in time through the first reset spring and the second reset spring, so that the double-speed chain loses tensioning force and is loosened, the tensioning state of the double-speed chain is relieved, the double-speed chain can be prevented from being broken in an over-tight state, and time is reserved for an operator to adjust the tensioning mechanism.

Description

Technical Field

[0001] The invention belongs to the technical field of conveying devices, and specifically relates to a double-speed chain conveying device. Background Art

[0002] The conveying principle of the double-speed chain conveyor is to use the speed-increasing function of the double-speed chain to make the tooling plate supporting the goods on it run quickly and stop at the corresponding operating position through the blocker; or to complete the accumulation action and the functions of shifting, turning, special line, etc. through corresponding instructions; it is widely used in various production lines of electronic and electrical, electromechanical and other industries, and plays an important role in improving production efficiency and reducing production costs.

[0003] However, the conventional device still has the following problems when used: The patent application publication number is CN110758989A, which discloses a double-speed chain conveyor. In this double-speed chain conveyor, a chain tensioning mechanism is arranged in a fixed shell. The chain tensioning mechanism supports the wear-resistant slider through a spring. The installation position of the spring adopts an adjustable structure, and an arc structure is arranged on the wear-resistant slider, so that the double-speed chain can transition from a curve to a straight line in an optimal arc manner, thereby reducing the collision between the chain roller and the guide rail in the double-speed chain, increasing the life of the chain roller, and reducing noise. The chain tensioning mechanism and the fixed shell are split structures, which can be disassembled and installed independently, and are convenient to use and maintain.

[0004] Due to the tensioning mechanism mentioned in the above document, it is necessary to adjust the tensioning mechanism when using it. When the speed chain is too tight or too loose, if the operator fails to adjust the tensioning mechanism of the speed chain in time, the chain may easily break.

[0005] Therefore, we need a double-speed chain conveying device to solve the problem that the double-speed chain will be disconnected if the tensioning mechanism is not adjusted in time when the chain is too tight, so as to avoid the double-speed chain being disconnected if the tensioning mechanism is not adjusted in time. Summary of the invention

[0006] In view of the deficiencies in the prior art, the object of the present invention is to provide a double-speed chain conveying device, which has the advantage of preventing the double-speed chain from being disconnected due to failure to adjust the tensioning mechanism in time.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solution: it includes a frame, wherein the outer wall of the top of the frame is fixedly connected to two fixed shells, the fixed shell is rotatably connected to a connecting shaft inside, the outer wall of the connecting shaft is located inside the fixed shell and is fixedly connected to a sprocket, the outer wall of the sprocket is meshingly connected to a double-speed chain, and a tensioning mechanism is arranged inside the fixed shell, the tensioning mechanism includes a shell one, and the outer wall of one side of the shell is fixedly connected to the inner wall of the fixed shell.

[0008] Preferably, the speed chain is composed of a roller, a connecting rod and a connecting plate, the two ends of the outer wall of the connecting rod are rotatably connected to the connecting plates, the middle of the outer wall of the connecting rod is fixedly connected with a protrusion, the outer wall of the connecting rod is rotatably connected to the roller, the inside of the roller is provided with a groove, and the inside of the groove is rotatably connected to the outer wall of the protrusion.

[0009] Preferably, the shell one is internally slidably connected to a movable frame, the outer walls on opposite sides of the two movable frames are provided with inclined sliding grooves, the two inclined sliding grooves are internally slidably connected to the same slider two, a threaded hole is provided in the middle of the slider two, a threaded rod is internally threadedly connected to the threaded hole, the outer wall of one end of the threaded rod is rotatably connected to the inner wall of the shell one, and the outer wall of the other end of the threaded rod is rotatably connected to the interior of the fixed shell.

[0010] Preferably, the upper parts of both sides of the two movable frames are movably connected with mounting plates 2, and the lower parts of both sides of the movable frames are movably connected with mounting plates 1, the outer walls of the two mounting plates 1 on opposite sides are fixedly connected with support rod 1, the outer walls of the two support rods 1 are rotatably connected with rotating sleeve 1, the outer walls of the two mounting plates 2 on opposite sides are fixedly connected with support rod 2, the outer walls of the two support rods 2 are rotatably connected with rotating sleeve 2, the outer wall of the bottom of the rotating sleeve 2 is movably in contact with the outer wall of the top of the chain, and the outer wall of the top of the support rod 1 is movably in contact with the outer wall of the bottom of the chain.

[0011] Preferably, a cavity is provided inside the movable frame, guide grooves are provided on both sides of the cavity, the outer walls at both ends of the mounting plate are fixedly connected with guide blocks, the outer walls of the guide blocks are slidably connected to the inside of the guide grooves, the outer wall of the bottom of the mounting plate is fixedly connected with a return spring, and the outer wall of the bottom of the return spring is fixedly connected to the lower part of the inner wall of the cavity.

[0012] Preferably, the outer wall of the bottom of the second mounting plate is fixedly connected to the second reset spring, and the outer wall of the bottom of the second mounting plate is located on both sides of the second reset spring and is fixedly connected to the second connecting rod, the outer wall of the second connecting rod is slidably connected to the inside of the square groove, the square groove is opened on the movable frame, and the outer wall of the bottom of the square groove is fixedly connected to the outer wall of the top of the first mounting plate.

[0013] Preferably, a shell 2 is fixedly connected below the inner wall of the cavity, slots are provided on the outer walls on both sides of the shell 2, mounting plates 3 are fixedly connected inside the slots, return springs 3 are fixedly connected on opposite sides of the two mounting plates 3, the outer wall of one end of the return spring 3 is fixedly connected to one side of the inner wall of the limit block, and the interior of the limit block is slidably connected to the outer wall of the mounting plate 3.

[0014] Preferably, an I-shaped limit rod is movably inserted into the interior of the shell body 2, and a cylindrical groove is opened on the outer wall of the bottom of the mounting plate 1, and the interior of the cylindrical groove is movably connected to the outer wall of the I-shaped limit rod, and the bottom of the mounting plate 1 is located on both sides of the cylindrical groove and is fixedly connected with push rods, and the outer walls of the bottom of the two push rods are movably contacted with the outer wall of the top of the limit block, one side of the limit block is an inclined surface, and the bottom of the push rod is an inclined surface, and the outer wall of the bottom of the limit block is movably contacted with the upper part of the bottom of the I-shaped limit rod.

[0015] Preferably, the outer wall of one side of the shell is screwed connected to a limiting shell, the outer wall of the bottom of the limiting shell is fixedly connected to a slider, a track is opened below the inner wall of the fixed shell, and the interior of the track is slidably connected to the outer wall of the slider.

[0016] Compared with the prior art, the present invention has the following beneficial effects: By simultaneously pushing the mounting plate 1 and the mounting plate 2 upwards by means of the reset spring 1 and the reset spring 2, the rotating sleeve 1 can push the speed chain upwards, thereby releasing the tensioning force of the speed chain, and avoiding the situation in which the speed chain is too tight and the tensioning mechanism of the speed chain is not adjusted in time to cause the chain to break. Accordingly, the speed chain is released in time by means of the reset spring 1 and the reset spring 2, so that the speed chain loses its tension and relaxes, and the tension of the speed chain is relieved, which can prevent the speed chain from breaking when it is too tight, and give the operator time to adjust the tensioning mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the frame structure of the present invention.

[0018] Figure 2 It is a schematic diagram of the internal structure of the fixed shell of the present invention.

[0019] Figure 3 It is a schematic diagram of the internal structure of the limiting shell of the present invention.

[0020] Figure 4 It is a schematic diagram of the roller structure of the present invention.

[0021] Figure 5 It is a schematic diagram of the shell structure of the present invention.

[0022] Figure 6 It is a schematic diagram of the structure of the mobile rack of the present invention.

[0023] Figure 7 It is a schematic diagram of the structure of the rotating sleeve 2 of the present invention.

[0024] Figure 8 It is a schematic diagram of the inclined chute structure of the present invention.

[0025] Fig. 9It is a schematic diagram of the cross-sectional structure of the mobile frame of the present invention.

[0026] Fig.10 It is a schematic diagram of the cylindrical groove structure of the present invention.

[0027] Fig.11 It is a schematic diagram of the limit block structure of the present invention.

[0028] In the figure: 1, frame; 11, fixed shell; 2, connecting shaft; 3, limit shell; 31, slider 1; 32, track; 4, shell 1; 41, threaded rod; 42, movable frame; 43, inclined slide groove; 44, slider 2; 5, roller; 51, sprocket; 52, connecting rod 1; 53, groove; 54, connecting plate; 6, mounting plate 1; 61, mounting plate 2; 62, support rod 1; 63, rotating sleeve 1; 64, support rod 2; 65, rotating sleeve 2; 7, cavity; 71, guide groove; 72, reset spring 1; 73, connecting rod 2; 74, square groove; 75, reset spring 2; 76, shell 2; 77, limit block; 78, reset spring 3; 79, mounting plate 3; 710, push rod; 711, I-shaped limit rod; 712, cylindrical groove. DETAILED DESCRIPTION

[0029] In order to make the purpose and technical solution of the present invention clearly and completely described, and the advantages more clearly understood, the embodiments of the present invention are further described in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present invention, not all of them, and are only used to explain the embodiments of the present invention, and are not used to limit the embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] For example, see Figures 1 to 11 The present invention provides a technical solution of a double-speed chain conveying device: it includes a frame 1, two fixed shells 11 are fixedly connected to the outer wall of the top of the frame 1, a connecting shaft 2 is rotatably connected inside the fixed shell 11, the outer wall of the connecting shaft 2 is located inside the fixed shell 11 and is fixedly connected to a sprocket 51, the outer wall of the sprocket 51 is meshed and connected to the double-speed chain, a tensioning mechanism is arranged inside the fixed shell 11, the double-speed chain comprises a roller 5, a connecting rod 52 and a connecting plate 54, both ends of the outer wall of the connecting rod 52 are rotatably connected to the connecting plate 54, a protrusion is fixedly connected to the middle position of the outer wall of the connecting rod 52, the outer wall of the connecting rod 52 is rotatably connected to the roller 5, a groove 53 is provided inside the roller 5, and the inside of the groove 53 is rotatably connected to the outer wall of the protrusion.

[0031] By rotating the roller 5, the contact between the roller 5 and the teeth can be transformed from sliding friction to rolling friction, thereby reducing the friction and wear between the roller 5 and the teeth. The efficiency of the conveying system is further improved by the rotation of the roller 5. The groove 53 on the roller 5 cooperates with the protrusion on the connecting rod 52 to limit the position of the roller 5, thereby preventing the roller 5 from moving left and right on the connecting rod 52. Accordingly, the stability of the roller 5 is increased and the working efficiency of the roller 5 is improved.

[0032] Embodiment 2, on the basis of embodiment 1, the tensioning mechanism includes a shell 4, the outer wall of one side of the shell 4 is fixedly connected to the inner wall of the fixed shell 11, the shell 4 is internally slidably connected with a movable frame 42, the outer walls of the two movable frames 42 on opposite sides are provided with inclined slide grooves 43, the two inclined slide grooves 43 are internally slidably connected with the same slider 2 44, a threaded hole is provided in the middle of the slider 2 44, the internal thread of the threaded hole is connected with a threaded rod 41, the outer wall of one end of the threaded rod 41 is rotatably connected to the inner wall of the shell 4, and the outer wall of the other end of the threaded rod 41 is rotatably connected to the interior of the fixed shell 11.

[0033] When the operator rotates the threaded rod 41 clockwise, the slider 44 can be moved toward the operator, and the speed chain is tightened. When the operator rotates the threaded rod 41 counterclockwise, the slider 44 can be moved to the side away from the operator, and the speed chain becomes loose, which makes it easier for the operator to adjust the tension of the speed chain, avoiding the operator from having to perform more steps when adjusting the tension of the speed chain, and correspondingly saving the time for adjusting the tension of the speed chain, reducing the complexity of the operation, and ensuring that the speed chain runs in an appropriate tension state, thereby ensuring that power is transmitted to the conveying plate more efficiently.

[0034] Embodiment three, on the basis of embodiment two, the upper parts of both sides of the two movable frames 42 are movably connected with mounting plates 61, the lower parts of both sides of the movable frames 42 are movably connected with mounting plates 6, the outer walls of the two mounting plates 6 on the opposite sides are fixedly connected with support rods 62, the outer walls of the two support rods 62 are rotatably connected with rotating sleeves 63, the outer walls of the two mounting plates 61 on the opposite sides are fixedly connected with support rods 64, the outer walls of the two support rods 64 are rotatably connected with rotating sleeves 65, the outer wall of the bottom of the rotating sleeve 65 is movably in contact with the outer wall of the top of the chain, and the outer wall of the top of the support rod 62 is movably in contact with the outer wall of the bottom of the chain.

[0035] Through the transmission of the double-speed chain, the rotating sleeve 2 65 and the rotating sleeve 1 63 can be made to rotate on the support rod 2 64 and the support rod 1 62, preventing the rotating sleeve 1 63 and the rotating sleeve 2 65 from always being stationary, thereby increasing the friction between the double-speed chain, further reducing the friction between the double-speed chain and the rotating sleeve 1 63 and the rotating sleeve 2 65, and reducing the loss of the double-speed chain. Accordingly, by limiting the double-speed chain by the rotating sleeve 2 65 and the rotating sleeve 1 63, the stability of the double-speed chain during the conveying process can be increased, thereby further improving the efficiency of the double-speed chain conveying.

[0036] Embodiment 4, on the basis of embodiment 3, a second shell 76 is fixedly connected to the lower part of the inner wall of the cavity 7, slots are provided on the outer walls on both sides of the second shell 76, a third mounting plate 79 is fixedly connected to the inside of the slots, a return spring 3 78 is fixedly connected to the opposite side of the two mounting plates 3 79, an outer wall at one end of the return spring 3 78 is fixedly connected to one side of the inner wall of the limit block 77, the inside of the limit block 77 is slidably connected to the outer wall of the mounting plate 3 79, and an I-shaped limit rod is movably inserted into the inside of the second shell 76 711, a cylindrical groove 712 is provided on the outer wall of the bottom of the mounting plate 6, and the interior of the cylindrical groove 712 is movably connected to the outer wall of the I-shaped limit rod 711, and the bottom of the mounting plate 6 is located on both sides of the cylindrical groove 712 and is fixedly connected with push rods 710, and the outer walls of the bottoms of the two push rods 710 are in movably contact with the outer wall of the top of the limit block 77, one side of the limit block 77 is an inclined surface, and the bottom of the push rod 710 is an inclined surface, and the outer wall of the bottom of the limit block 77 is in movably contact with the upper part of the bottom of the I-shaped limit rod 711.

[0037] By moving the push rod 710 downward, the limit block 77 can be pushed on the mounting plate three 79 to move toward the outer walls on both sides of the shell two 76, so that the limit block 77 releases the limit on the I-shaped limit rod 711. By releasing the limit on the I-shaped limit rod 711 by the limit block 77, the reset spring 1 72 can start working. This operation can automatically adjust the positions of related components according to the tensioning state of the speed chain, reduce the vibration and noise caused by the chain being too tight or too loose, and improve the overall operating stability of the equipment.

[0038] Embodiment 5, on the basis of embodiment 4, a cavity 7 is opened inside the movable frame 42, guide grooves 71 are opened on both sides of the cavity 7, the outer walls at both ends of the mounting plate 6 are fixedly connected with guide blocks, the outer walls of the guide blocks are slidably connected to the inside of the guide grooves 71, the outer wall at the bottom of the mounting plate 6 is fixedly connected with a return spring 72, the outer wall at the bottom of the return spring 72 is fixedly connected to the lower part of the inner wall of the cavity 7, the outer wall at the bottom of the mounting plate 61 is fixedly connected with a return spring 75, the outer wall at the bottom of the mounting plate 61 is located on both sides of the return spring 75 and is fixedly connected with a connecting rod 73, the outer wall of the connecting rod 73 is slidably connected to the inside of the square groove 74, the square groove 74 is opened on the movable frame 42, and the outer wall at the bottom of the square groove 74 is fixedly connected to the outer wall at the top of the mounting plate 6.

[0039] By simultaneously pushing the mounting plate 1 6 and the mounting plate 2 61 upwards through the reset spring 1 72 and the reset spring 2 75, the rotating sleeve 1 63 can push the speed chain upwards, thereby releasing the tensioning force of the speed chain, and avoiding the situation in which the speed chain is too tight and the tensioning mechanism of the speed chain is not adjusted in time to cause the chain to break. Accordingly, the speed chain is released in time through the reset spring 1 72 and the reset spring 2 75, so that the speed chain loses its tension and relaxes, and the tension of the speed chain is relieved, which can prevent the speed chain from breaking when it is too tight, and give the operator time to adjust the tensioning mechanism.

[0040] Embodiment 6, on the basis of embodiment 2, the outer wall of one side of the shell 4 is screwed connected to the limiting shell 3, the outer wall at the bottom of the limiting shell 3 is fixedly connected to the slider 31, and a track 32 is opened below the inner wall of the fixed shell 11, and the interior of the track 32 is slidably connected to the outer wall of the slider 31.

[0041] By setting the limiting shell 3 on the outer wall of the sprocket 51, when the speed chain is too loose, the limiting shell 3 can limit the movement of the speed chain on the sprocket 51, thereby preventing the speed chain from being separated from the sprocket 51 when it is too loose, and correspondingly increasing the self-stability of the speed chain on the sprocket 51, preventing the conveying system from malfunctioning, and reducing the steps required to install the speed chain on the sprocket 51 before adjusting the tensioning mechanism, thereby further improving the efficiency of adjusting the tensioning mechanism.

[0042] The working principle and use process of the present invention are as follows: when working, first, a motor is fixedly connected to one end of the connecting shaft 2, and the motor is started, and then the connecting shaft 2 is rotated by the movement of the motor. The rotation of the connecting shaft 2 can simultaneously drive the two sprockets 51 to rotate, and then the rotation of the sprocket 51 can make the double-speed chain work. The roller 5 on the double-speed chain is rotatably connected to the connecting rod 52. When the teeth on the sprocket 51 contact the roller 5 to apply transmission force to the roller 5, the teeth are used to apply transmission force to the roller 5. The force between the rollers 5 and the teeth causes the rollers 5 to rotate. At this time, the rotation of the rollers 5 can transform the contact between the rollers 5 and the teeth from sliding friction to rolling friction, thereby reducing the friction and wear between the rollers 5 and the teeth. The rotation of the rollers 5 further improves the efficiency of the conveying system. The grooves 53 on the rollers 5 cooperate with the protrusions on the connecting rods 52 to limit the position of the rollers 5, thereby preventing the rollers 5 from moving left and right on the connecting rods 52. This increases the stability of the rollers 5 and improves the working efficiency of the rollers 5.

[0043] The speed chain passes through the rotating sleeve 1 63 and the rotating sleeve 2 65. When it is necessary to adjust the tension of the speed chain, the operator can rotate the threaded rod 41, and the threaded connection between the threaded rod 41 and the slider 2 44 can be utilized to move the slider 2 44 inside the inclined slide groove 43. When the operator rotates the threaded rod 41 clockwise, the slider 2 44 can be moved toward the operator. At this time, the speed chain is tightened. When the operator rotates the threaded rod 41 counterclockwise, the slider 2 44 can be moved to the side away from the operator. At this time, the speed chain becomes loose, which makes it easier for the operator to adjust the tension of the speed chain, avoiding the operator having to perform more steps when adjusting the tension of the speed chain, and correspondingly saving the time for adjusting the tension of the speed chain, reducing the complexity of the operation, and ensuring that the speed chain runs under an appropriate tension state to ensure that power is transmitted to the conveying plate more efficiently.

[0044] By setting the rotating sleeve 2 65 and the rotating sleeve 1 63 inside the moving frame 42, when the moving frame 42 adjusts the tension of the double-speed chain, the double-speed chain will contact the inner wall of the moving frame 42, so that when the double-speed chain passes through the inner wall of the moving frame 42, friction will be generated between the moving frame 42, increasing the loss of the double-speed chain. Correspondingly, by setting the rotating sleeve 2 65 and the rotating sleeve 1 63, when the double-speed chain passes between them, the rotating sleeve 2 65 can be driven by the double-speed chain. And the rotating sleeve 1 63 rotates on the support rod 2 64 and the support rod 1 62 accordingly, preventing the rotating sleeve 1 63 and the rotating sleeve 2 65 from always being stationary, thereby increasing the friction between the speed chain, further reducing the friction between the speed chain and the rotating sleeve 1 63 and the rotating sleeve 2 65, and reducing the loss of the speed chain. Accordingly, by limiting the speed chain by the rotating sleeve 2 65 and the rotating sleeve 1 63, the stability of the speed chain during the conveying process can be increased, thereby further improving the efficiency of the speed chain conveying.

[0045] When the speed chain is too tight, it will cause the speed chain to generate pressure on the rotating sleeve 63. When the rotating sleeve 63 is subjected to pressure, the support rod 62 will drive the mounting plate 6 to move toward the inside of the cavity 7. The downward movement of the mounting plate 6 can drive the push rod 710 and the cylindrical groove 712 to move downward. The downward movement of the push rod 710 can push the limit block 77 on the mounting plate 3 79 to move toward the outer walls on both sides of the shell 2 76, so that the limit block 77 releases the limit on the I-shaped limit rod 711. By releasing the limit on the I-shaped limit rod 711 by the limit block 77, the reset spring 72 can start working. This operation can automatically adjust the position of related components according to the tensioning state of the speed chain, reduce the vibration and noise caused by the chain being too tight or too loose, and improve the overall operation stability of the equipment.

[0046] By simultaneously pushing the mounting plate 1 6 and the mounting plate 2 61 upwards through the reset spring 1 72 and the reset spring 2 75, the rotating sleeve 1 63 can push the speed chain upwards, thereby releasing the tensioning force of the speed chain, and avoiding the situation in which the speed chain is too tight and the tensioning mechanism of the speed chain is not adjusted in time to cause the chain to break. Accordingly, the speed chain is released in time through the reset spring 1 72 and the reset spring 2 75, so that the speed chain loses its tension and relaxes, and the tension of the speed chain is relieved, which can prevent the speed chain from breaking when it is too tight, and give the operator time to adjust the tensioning mechanism.

[0047] It should be noted that: by pressing the square rod on the I-shaped limit rod 711, the I-shaped limit rod 711 can be moved downward inside the cylindrical groove 712, so that the bottom of the I-shaped limit rod 711 pushes the limit block 77. When the I-shaped limit rod 711 moves to the bottom of the limit block 77, the limit block 77 can be re-fixed above the bottom of the I-shaped limit rod 711 under the action of the reset spring 3 78, so that the I-shaped limit rod 711 can be prepared for the next work.

[0048] By setting the limiting shell 3 on the outer wall of the sprocket 51, when the speed chain is too loose, the limiting shell 3 can limit the movement of the speed chain on the sprocket 51, thereby preventing the speed chain from being separated from the sprocket 51 when it is too loose, and correspondingly increasing the self-stability of the speed chain on the sprocket 51, preventing the conveying system from malfunctioning, and reducing the steps required to install the speed chain on the sprocket 51 before adjusting the tensioning mechanism, thereby further improving the efficiency of adjusting the tensioning mechanism.

[0049] It should be noted that: through the screw connection between the limit shell 3 and the shell 1 4, when the limit shell 3 needs to be removed, it is only necessary to remove the screws to separate the limit shell 3 from the shell 1 4, thereby removing the limit shell 3 from the inside of the fixed shell 11, and through the cooperation of the slider 1 31 and the track 32, the limit shell 3 can be positioned when installed.

[0050] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A double-speed chain conveyor device, comprising a frame (1), characterized in that: Two fixed shells (11) are fixedly connected to the outer wall of the top of the frame (1); a connecting shaft (2) is rotatably connected to the interior of the fixed shell (11); an outer wall of the connecting shaft (2) is located inside the fixed shell (11) and is fixedly connected to a sprocket (51); a multiple-speed chain is meshedly connected to the outer wall of the sprocket (51); and a tensioning mechanism is provided inside the fixed shell (11); The tensioning mechanism comprises a shell (4), the outer wall of one side of the shell (4) is fixedly connected to the inner wall of the fixed shell (11), the shell (4) is internally slidably connected to a movable frame (42), the outer walls of two movable frames (42) on opposite sides are provided with inclined slide grooves (43), the two inclined slide grooves (43) are internally slidably connected to a same slider (44), a threaded hole is provided at the middle position of the slider (44), a threaded rod (41) is internally threadedly connected to the threaded hole, the outer wall of one end of the threaded rod (41) is rotatably connected to the inner wall of the shell (4), and the outer wall of the other end of the threaded rod (41) is rotatably connected to the inside of the fixed shell (11).

2. A double-speed chain conveyor device according to claim 1, characterized in that: The double-speed chain comprises a roller (5), a connecting rod (52) and a connecting plate (54); the two ends of the outer wall of the connecting rod (52) are rotatably connected to the connecting plate (54); a protrusion is fixedly connected to the middle of the outer wall of the connecting rod (52); the outer wall of the connecting rod (52) is rotatably connected to the roller (5); a groove (53) is provided inside the roller (5); and the inside of the groove (53) is rotatably connected to the outer wall of the protrusion.

3. The double-speed chain conveyor according to claim 1, characterized in that: The upper sides of the two movable frames (42) are movably connected with mounting plates 2 (61), the lower sides of the two movable frames (42) are movably connected with mounting plates 1 (6), the outer walls of the two mounting plates 1 (6) on the opposite sides are fixedly connected with support rods 1 (62), the outer walls of the two support rods 1 (62) are rotatably connected with rotating sleeves 1 (63), the outer walls of the two mounting plates 2 (61) on the opposite sides are fixedly connected with support rods 2 (64), the outer walls of the two support rods 2 (64) are rotatably connected with rotating sleeves 2 (65), the outer wall of the bottom of the rotating sleeve 2 (65) is in movable contact with the outer wall of the top of the chain, and the outer wall of the top of the support rod 1 (62) is in movably contact with the outer wall of the bottom of the chain.

4. A double-speed chain conveyor device according to claim 3, characterized in that: A cavity (7) is provided inside the movable frame (42), guide grooves (71) are provided on both sides of the cavity (7), guide blocks are fixedly connected to the outer walls at both ends of the mounting plate (6), the outer walls of the guide blocks are slidably connected to the inside of the guide grooves (71), a return spring (72) is fixedly connected to the outer wall of the bottom of the mounting plate (6), and the outer wall of the bottom of the return spring (72) is fixedly connected to the lower part of the inner wall of the cavity (7).

5. The double-speed chain conveyor device according to claim 3, characterized in that: The outer wall of the bottom of the second mounting plate (61) is fixedly connected to the second return spring (75), and the outer wall of the bottom of the second mounting plate (61) is located on both sides of the second return spring (75) and is fixedly connected to the second connecting rod (73), the outer wall of the second connecting rod (73) is slidably connected to the inside of the square groove (74), the square groove (74) is opened on the movable frame (42), and the outer wall of the bottom of the square groove (74) is fixedly connected to the outer wall of the top of the first mounting plate (6).

6. The double-speed chain conveyor device according to claim 4, characterized in that: A shell body 2 (76) is fixedly connected below the inner wall of the cavity (7), and slots are provided on the outer walls on both sides of the shell body 2 (76). A mounting plate 3 (79) is fixedly connected inside the slots, and a return spring 3 (78) is fixedly connected on opposite sides of the two mounting plates 3 (79). The outer wall of one end of the return spring 3 (78) is fixedly connected to one side of the inner wall of the limit block (77), and the interior of the limit block (77) is slidably connected to the outer wall of the mounting plate 3 (79).

7. A double-speed chain conveyor device according to claim 6, characterized in that: An I-shaped limit rod (711) is movably inserted into the interior of the second shell (76); a cylindrical groove (712) is provided on the outer wall of the bottom of the first mounting plate (6); the interior of the cylindrical groove (712) is movably sleeved with the outer wall of the I-shaped limit rod (711); the bottom of the first mounting plate (6) is fixedly connected with push rods (710) on both sides of the cylindrical groove (712); the outer walls of the bottoms of the two push rods (710) are in movably contact with the outer wall of the top of the limit block (77); one side of the limit block (77) is an inclined surface; the bottom of the push rod (710) is an inclined surface; the outer wall of the bottom of the limit block (77) is in movably contact with the upper part of the bottom of the I-shaped limit rod (711).

8. The double-speed chain conveyor device according to claim 1, characterized in that: The outer wall of one side of the shell (4) is screwed to the limit shell (3), the outer wall at the bottom of the limit shell (3) is fixedly connected to a slider (31), a track (32) is provided below the inner wall of the fixed shell (11), and the interior of the track (32) is slidably connected to the outer wall of the slider (31).

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