Head spiral tensioning device

Abstract

The invention discloses a head spiral tensioning device, which relates to the technical field of belt conveyor accessories and comprises a rack, a belt, a head movable frame, a thread bushing and an extension frame. The head movable frame is arranged in the rack, the tensioning roller is arranged in the head movable frame, when the tensioning roller horizontally slides along with the head movable frame, the tensioning force of a belt can be adjusted, the whole head movable frame can slide in the rack, and therefore the tensioning force of the belt can be adjusted; the head movable frame slides inwards and is not affected by external small space, after the head movable frame contracts inwards, the size occupied by the device can be reduced, a threaded sleeve is arranged in the head movable frame, a driving screw is arranged in the threaded sleeve, the driving screw is matched with the threaded sleeve, the position of the head movable frame can be adjusted, and in addition, the head movable frame is convenient to move. And the driving screw rod and the threaded sleeve are both arranged in the rack and are not easily influenced by external small space, so that the device is convenient to use.

Description

Technical Field

[0001] The invention relates to the technical field of belt conveyor accessories, in particular to a head spiral tensioning device. Background Art

[0002] For the belt conveyor to operate normally, the conveyor belt must have a certain tension. The conveyor belt has a certain tension to generate sufficient friction between the conveyor belt and the drive roller to ensure that the drive roller drives the conveyor belt to operate normally. The tensioning device is an auxiliary device that provides tension for the normal operation of the belt conveyor and is indispensable in the conveyor belt transportation system.

[0003] The spiral tensioning device is a commonly used belt conveyor tensioning device, which is used to adjust the tension of the belt conveyor. It is mainly composed of a screw, a nut, a slide plate and other components. Its working principle is to adjust the screw manually or through a small hydraulic cylinder to achieve the required tension and lock it. It is generally used at the tail of the belt conveyor.

[0004] For example, a track-type spiral automatic tensioning device with publication number CN107444851A includes a tensioning car, a guide rail, a lead screw, a reducer, a motor and an electric control box; the tensioning car is placed in the guide rail, a roller for tightening the tape is fixedly connected to the top, and a lead screw nut connected to the lead screw thread is arranged on the bottom; the input and output ends of the reducer are respectively connected to the motor and the lead screw through a coupling, the motor power line is connected in the electric box, and an external power supply is arranged in the electric control box. The guide rail in the present invention adopts a floor-standing arrangement, which improves the overall rigidity of the device and is particularly suitable for tensioning conditions with a larger stroke.

[0005] The above technical solution has some problems in practical application. The technical solution can only realize the adjustment of a single roller. However, when the belt conveyor has limited head space, the adjustment effect of a single roller position is limited, and the purpose of repairing the belt conveyor cannot be achieved by adjusting the roller position. Moreover, when the roller position is adjusted, the belt will be loose. If there is residual material on the belt, the loose belt will easily cause the material to spill and create a safety hazard, which is not conducive to the inspection and maintenance of the belt conveyor.

[0006] Therefore, it is necessary to invent a head spiral tensioning device to solve the above problems. Summary of the invention

[0007] The object of the present invention is to provide a head spiral tensioning device to solve the problems raised in the above background technology.

[0008] To achieve the above object, the present invention provides the following technical solution: a head spiral tensioning device, comprising: A frame, inside of which are provided with supporting rollers, driving rollers, guide rollers and fixed rollers; The belt is arranged inside the frame and passes through the driving roller, the guide roller and the outer side of the fixed roller in sequence; A head movable frame is arranged at one end of the interior of the frame and can slide inside the frame, and a tensioning roller for guiding the belt is arranged at one end of the interior of the head movable frame; A threaded sleeve is arranged inside the head movable frame through a fixing plate, a driving screw is arranged inside the threaded sleeve, and the driving screw is arranged inside the frame; The extension frame is arranged inside the frame and below the head movable frame. One end inside the extension frame is provided with a movable roller for following the movement of the tensioning roller.

[0009] Preferably, a support plate is located outside the head movable frame; A slider and a slide rail, wherein the slider is arranged at the bottom end of the support plate, and the slide rail is arranged at the outer side of the extension frame, and the slider and the slide rail limit the sliding range of the head movable frame above the extension frame; A rack, which is located inside the slide rail and can move up and down; The tooth groove is arranged at the bottom end of the sliding block, and the rack and the tooth groove are used to limit the head movable frame to drive the extension frame to move synchronously.

[0010] Preferably, a slot is provided at the bottom end of the slide rail, and the slot is used to limit the up and down movement of the rack; A fixed block, which is located at the outer bottom end of the extension frame, and a tension spring is provided between the fixed block and the rack; The pressing block is arranged in a through slot opened at the bottom end of the outer side of the extension frame. The pressing block can slide horizontally in the through slot and press the rack to make it slide upward.

[0011] Preferably, a movable block is located inside the extension frame and is provided at one end of the pressing block; A movable seat, which is located inside the extension frame and connected to the movable block through a connecting arm; The adjusting screw is threadably arranged in the middle of the movable seat and is located inside the extension frame. An adjusting motor is arranged at one end of the adjusting screw.

[0012] Preferably, the limiting rod is located outside the movable seat and can slide horizontally with the movable seat; There are a plurality of limit slots, all of which are arranged on the outside of the frame. The limit rods and the limit slots can limit the position of the extension frame in the frame.

[0013] Preferably, the first guide rod is located outside the head movable frame, and is arranged in a first guide groove opened outside the frame; The second guide rod is located at the outside of the extension frame and is arranged in a second guide groove opened at the outside of the frame.

[0014] Preferably, the driving motor is located at one end of the driving screw and is arranged inside the frame through a support.

[0015] Preferably, a power motor is provided at one end of the driving roller, and a portion of the belt between the driving roller and the guide roller is inclined.

[0016] Preferably, the end of the pressing block is configured as an upwardly inclined structure, and one end of the pressing block is configured to have a rounded corner.

[0017] Preferably, the first guide groove and the second guide groove are both configured as horizontal structures.

[0018] Technical effects and advantages of the present invention: 1. The present invention arranges a head movable frame inside the frame, and a tensioning roller is arranged inside the head movable frame. When the tensioning roller slides horizontally with the head movable frame, the belt tensioning force can be adjusted. The head movable frame as a whole can slide inside the frame to adjust the belt tensioning force. The inward sliding of the head movable frame is not affected by the small space outside. After the head movable frame shrinks inward, the volume occupied by the device can be reduced. While the belt tensioning force adjustment is achieved, the maintenance work of the device is convenient. 2. The present invention arranges an extension frame inside the frame, and a movable roller is arranged inside the extension frame. The movable roller can move with the tensioning roller or remain stationary when the tensioning roller moves. When adjusting the belt tension, the position of the movable roller remains stationary, and the movement of the tensioning roller can adjust the belt tension. When the belt conveyor is overhauled, the tensioning roller and the movable roller can move synchronously, and the tension of the belt is not affected while the position of the tensioning roller is adjusted, so as to avoid the spillage of residual materials on the belt surface, thereby ensuring the stability of the device during the overhaul process; 3. The present invention arranges a threaded sleeve inside the head movable frame, and a driving screw is arranged inside the threaded sleeve. The driving screw cooperates with the threaded sleeve to adjust the position of the head movable frame to achieve the effect of adjusting the position of the tensioning roller. Moreover, after the driving screw and the threaded sleeve adjust the position of the head movable frame, the position can be locked to ensure the stability of the tensioning roller after adjustment. Moreover, the driving screw and the threaded sleeve are both arranged inside the frame and are not easily affected by the small external space, which facilitates the use of the device. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0020] Figure 2 It is a side schematic diagram of the overall structure of the present invention.

[0021] Figure 3 It is a schematic cross-sectional view of the overall structure of the present invention.

[0022] Figure 4 It is a side sectional schematic diagram of the overall structure of the present invention.

[0023] Figure 5 It is a schematic diagram of the interior of the frame structure of the present invention.

[0024] Figure 6 It is a schematic diagram of the structure of the head movable frame and the extension frame of the present invention.

[0025] Figure 7 It is a schematic diagram of the extension frame structure of the present invention.

[0026] Figure 8 It is a side schematic diagram of the extension frame structure of the present invention.

[0027] Fig. 9 It is a schematic diagram of the structure of the head movable frame of the present invention.

[0028] Fig.10 It is a side schematic diagram of the head movable frame and the extension frame structure of the present invention.

[0029] In the figure: 1, frame; 2, belt; 3, head movable frame; 4, extension frame; 11, support roller; 12, drive roller; 13, guide roller; 14, fixed roller; 31, tension roller; 32, support plate; 33, slider; 34, slide rail; 35, rack; 351, slot; 352, fixed block; 353, tension spring; 36, tooth groove; 37, threaded sleeve; 371, fixed plate; 372, drive screw; 373, drive motor; 374, support; 38, first guide rod; 381, first guide groove; 41, movable roller; 42, movable block; 43, pressure block; 431, through groove; 44, limit rod; 441, limit groove; 45, movable seat; 46, connecting arm; 47, adjusting screw; 48, adjusting motor; 49, second guide rod; 491, second guide groove. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on 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.

[0031] like Figures 1 to 10As shown, a head spiral tensioning device provided according to the present invention is essentially a device that can slide at the head of the belt conveyor to adjust the tensioning force of the belt 2 of the belt conveyor. A head movable frame 3 is arranged at one end of the frame 1, and a tensioning roller 31 for adjusting the tensioning force of the belt 2 is arranged inside the head movable frame 3. When the head movable frame 3 drives the tensioning roller 31 to move, the tensioning roller 31 can pull the belt 2 to adjust its tensioning force. An extension frame 4 is arranged below the head movable frame 3, and a movable roller 41 is arranged inside the extension frame 4. When adjusting the tensioning force of the belt 2, the movable roller 41 remains stationary, and the tensioning roller 31 can pull the belt 2 to adjust its tension. When the position of the tensioning roller 31 is adjusted to overhaul the device, the head movable frame 3 and the extension frame 4 can move synchronously, and the tensioning force of the belt 2 is not affected while adjusting the position of the tensioning roller 31, thereby preventing the material above the belt 2 from spilling, so as to facilitate the overhaul of the device.

[0032] In terms of specific structural installation, the structural body can be constructed according to the inventive concept of this embodiment, and no special limitation is made in this embodiment.

[0033] In this embodiment, a head spiral tensioning device includes: The frame 1 is provided with a support roller 11, a driving roller 12, a guide roller 13 and a fixed roller 14. A power motor is provided at one end of the driving roller 12. The portion of the belt 2 between the driving roller 12 and the guide roller 13 is inclined. The belt 2 is arranged inside the frame 1 and passes through the outer sides of the driving roller 12, the guide roller 13 and the fixed roller 14 in sequence; A head movable frame 3 is arranged at one end of the interior of the frame 1 and can slide inside the frame 1. A tensioning roller 31 for guiding the belt 2 is arranged at one end of the interior of the head movable frame 3. A threaded sleeve 37 is arranged inside the head movable frame 3 through a fixing plate 371, a driving screw 372 is arranged inside the threaded sleeve 37, and the driving screw 372 is arranged inside the frame 1, and a driving motor 373 is located at one end of the driving screw 372 and is arranged inside the frame 1 through a support 374; A support plate 32, which is located outside the head movable frame 3; The slider 33 and the slide rail 34 are provided at the bottom end of the support plate 32, and the slide rail 34 is provided at the outer side of the extension frame 4. The slider 33 and the slide rail 34 limit the sliding range of the head movable frame 3 above the extension frame 4; A rack 35, which is located inside the slide rail 34 and can move up and down; The tooth groove 36 is provided at the bottom end of the slider 33. The rack 35 and the tooth groove 36 are used to limit the head movable frame 3 to drive the extension frame 4 to move synchronously; A slot 351 is provided at the bottom end of the slide rail 34, and the slot 351 is used to limit the up and down movement of the rack 35; A fixed block 352 is located at the outer bottom end of the extension frame 4. A tension spring 353 is provided between the fixed block 352 and the rack 35. The tension spring 353 can apply tension to the rack 35 to separate it from the tooth groove 36. A first guide rod 38, which is located outside the head movable frame 3 and is arranged in a first guide groove 381 opened outside the frame 1; The extension frame 4 is arranged inside the frame 1 and below the head movable frame 3. A movable roller 41 for following the movement of the tensioning roller 31 is arranged at one end of the extension frame 4. The pressing block 43 is disposed in a through slot 431 formed at the bottom end of the outer side of the extension frame 4. The pressing block 43 can slide horizontally in the through slot 431 and press the rack 35 to make it slide upward. The movable block 42 is located inside the extension frame 4 and is disposed at one end of the pressing block 43. The end of the pressing block 43 is configured to be an upwardly inclined structure, and one end of the pressing block 43 is configured to have a rounded corner. The rounded corner facilitates the pressing block 43 to squeeze the rack 35 to make it move upward; A movable seat 45, which is located inside the extension frame 4 and connected to the movable block 42 through a connecting arm 46; An adjusting screw 47 is threadedly disposed in the middle of the movable seat 45 and located inside the extension frame 4. An adjusting motor 48 is disposed at one end of the adjusting screw 47. A limiting rod 44, which is located outside the movable seat 45 and can slide horizontally with the movable seat 45; A plurality of limiting grooves 441 are provided and are all arranged on the outside of the frame 1. The limiting rod 44 and the limiting groove 441 can limit the position of the extension frame 4 in the frame 1; The second guide rod 49 is located on the outside of the extension frame 4, and is arranged in the second guide groove 491 opened on the outside of the frame 1. The first guide groove 381 and the second guide groove 491 are both set as horizontal structures. The first guide groove 381 and the second guide groove 491 can limit the movement trajectory of the head movable frame 3 and the extension frame 4 so that they can only move horizontally.

[0034] When using a head spiral tensioning device of this embodiment, the belt 2 passes through the support roller 11, the driving roller 12, the guide roller 13, the fixed roller 14, the movable roller 41 and the tensioning roller 31 at one time; When adjusting the tension of the belt 2, the driving motor 373 can drive the driving screw 372 to rotate, and the driving screw 372 cooperates with the threaded sleeve 37, so that the threaded sleeve 37 can drive the head movable frame 3 to slide horizontally, and the head movable frame 3 can drive the tensioning roller 31 to move, so that the tension of the belt 2 can be adjusted. In this process, the rack 35 is separated from the tooth groove 36 under the action of the tension spring 353, and the limit rod 44 is inserted into the limit groove 441. At this time, the extension frame 4 and the head movable frame 3 move separately, and the position of the extension frame 4 is kept fixed under the restriction of the limit rod 44 and the limit groove 441. At this time, the movement of the tensioning roller 31 can adjust the tension of the belt 2; When adjusting the position of the tensioning roller 31 to inspect and clean the device, the adjusting motor 48 drives the adjusting screw 47 to move, and the adjusting screw 47 drives the movable seat 45 to move under the action of the thread, and the movable seat 45 can drive the pressure block 43 and the limit rod 44 to move, so that the pressure block 43 and the limit rod 44 move toward the direction of the extension frame 4. At this time, the limit rod 44 is separated from the limit groove 441, and the pressure block 43 can squeeze the rack 35, so that the rack 35 moves upward and is inserted into the tooth groove 36. At this time, the limit of the extension frame 4 is released and the linkage with the head movable frame 3 is realized. At this time, the head movable frame 3 can drive the extension frame 4 to move when it moves, so that the tensioning roller 31 and the movable roller 41 move at the same time. At this time, the position adjustment of the tensioning roller 31 can be achieved without affecting the tension of the belt 2, so as to avoid the residual material above the belt 2 from spilling and causing safety hazards.

[0035] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A head spiral tensioning device, characterized in that: include: A frame (1) having a support roller (11), a drive roller (12), a guide roller (13) and a fixed roller (14) disposed therein; A belt (2) is arranged inside the frame (1) and passes through the outer sides of a driving roller (12), a guide roller (13) and a fixed roller (14) in sequence; A head movable frame (3) is arranged at one end inside the frame (1) and can slide inside the frame (1), and a tensioning roller (31) for guiding the belt (2) is provided at one end inside the head movable frame (3); A threaded sleeve (37) is arranged inside the head movable frame (3) via a fixing plate (371), a driving screw (372) is arranged inside the threaded sleeve (37), and the driving screw (372) is arranged inside the frame (1); An extension frame (4) is arranged inside the frame (1) and below the head movable frame (3); a movable roller (41) for following the movement of the tensioning roller (31) is provided at one end inside the extension frame (4).

2. A head spiral tensioning device according to claim 1, characterized in that: Also includes: A support plate (32) located outside the head movable frame (3); A slider (33) and a slide rail (34), wherein the slider (33) is arranged at the bottom end of the support plate (32), and the slide rail (34) is arranged on the outside of the extension frame (4), and the slider (33) and the slide rail (34) limit the sliding range of the head movable frame (3) above the extension frame (4); A rack (35) located inside the slide rail (34) and capable of moving up and down; A tooth groove (36) is provided at the bottom end of the slider (33); the rack (35) and the tooth groove (36) are used to limit the synchronous movement of the head movable frame (3) and the extension frame (4).

3. A head spiral tensioning device according to claim 2, characterized in that: Also includes: A slot (351) is provided at the bottom end of the slide rail (34), and the slot (351) is used to limit the up and down movement of the rack (35); A fixed block (352) located at the outer bottom end of the extension frame (4), a tension spring (353) being provided between the fixed block (352) and the rack (35); The pressing block (43) is arranged in a through groove (431) opened at the bottom end of the outer side of the extension frame (4). The pressing block (43) can slide horizontally in the through groove (431) and press the rack (35) to make it slide upward.

4. A head spiral tensioning device according to claim 3, characterized in that: Also includes: A movable block (42) located inside the extension frame (4) and arranged at one end of the pressing block (43); A movable seat (45) located inside the extension frame (4) and connected to the movable block (42) via a connecting arm (46); An adjusting screw rod (47) is threadably disposed in the middle of the movable seat (45) and is located inside the extension frame (4). An adjusting motor (48) is disposed at one end of the adjusting screw rod (47).

5. A head spiral tensioning device according to claim 4, characterized in that: Also includes: A limiting rod (44), which is located outside the movable seat (45) and can slide horizontally along with the movable seat (45); A plurality of limiting grooves (441) are provided and are all arranged on the outside of the frame (1); the limiting rod (44) and the limiting groove (441) can limit the position of the extension frame (4) in the frame (1).

6. A head spiral tensioning device according to claim 1, characterized in that: Also includes: A first guide rod (38) located outside the head movable frame (3) and arranged in a first guide groove (381) provided outside the frame (1); The second guide rod (49) is located outside the extension frame (4) and is arranged in a second guide groove (491) opened outside the frame (1).

7. A head spiral tensioning device according to claim 1, characterized in that: Also includes: The driving motor (373) is located at one end of the driving screw rod (372) and is arranged inside the frame (1) through a support (374).

8. A head spiral tensioning device according to claim 1, characterized in that: Also includes: A power motor is provided at one end of the driving roller (12), and a portion of the belt (2) located between the driving roller (12) and the guide roller (13) is arranged in an inclined manner.

9. A head spiral tensioning device according to claim 3, characterized in that: Also includes: The end of the pressing block (43) is configured as an upwardly inclined structure, and one end of the pressing block (43) is configured to have a rounded corner.

10. A head spiral tensioning device according to claim 6, characterized in that: Also includes: The first guide groove (381) and the second guide groove (491) are both configured as horizontal structures.

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