Head screw tensioning device

Abstract

The application discloses a head spiral tensioning device and relates to the technical field of belt conveyor accessories, which comprises a rack, a belt, a head movable frame, a threaded sleeve and an extension frame. The head movable frame is arranged in the rack, the inside of the head movable frame is provided with a tensioning roller, the tensioning roller can adjust the tensioning force of the belt when sliding horizontally along the head movable frame, the head movable frame can slide in the rack to adjust the tensioning force of the belt, the head movable frame is not affected by the small space outside when sliding inward, the volume of the device can be reduced after the head movable frame is retracted inward, the threaded sleeve is arranged in the head movable frame, the inside of the threaded sleeve is provided with a driving screw, the driving screw is matched with the threaded sleeve, the position of the head movable frame can be adjusted, the driving screw and the threaded sleeve are arranged in the rack and are not affected by the small space outside, and the use of the device is facilitated.

Description

Technical Field

[0001] This invention relates to the field of belt conveyor accessories technology, and in particular to a head spiral tensioning device. Background Technology

[0002] For a belt conveyor to operate normally, the conveyor belt must have a certain tension. Sufficient tension is necessary to generate enough friction between the conveyor belt and the drive roller, ensuring the drive roller can drive 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 a conveyor belt transport system.

[0003] A screw tensioner is a commonly used belt conveyor tensioning device used to adjust the tension of the belt conveyor. It mainly consists of a screw, nut, and slide plate. Its working principle is to manually adjust the screw or adjust it using a small hydraulic cylinder to achieve the required tension, and then lock it in place. It is generally used at the tail end of the belt conveyor.

[0004] For example, a track-type automatic spiral tensioning device, disclosed in CN107444851A, includes a tensioning carriage, a guide rail, a lead screw, a reducer, a motor, and an electrical control box. The tensioning carriage is placed inside the guide rail, with a roller for tensioning the conveyor belt fixedly connected above it, and a lead screw nut threadedly connected to the lead screw on its bottom surface. The input and output ends of the reducer are connected to the motor and the lead screw respectively via couplings. The motor's power line is connected to the electrical control box, which contains an external power supply. In this invention, the guide rail is arranged on the ground, which improves the overall rigidity of the device and is particularly suitable for tensioning conditions with large strokes.

[0005] The above technical solution has some problems in practical application. This technical solution can only adjust the position of a single roller. However, when the head space of the belt conveyor is limited, the adjustment of the position of a single roller is limited. It cannot achieve the purpose of maintenance of the belt conveyor by adjusting the position of the roller. Furthermore, when the position of the roller is adjusted, the belt will loosen. If there is residual material on the belt, the looseness of the belt can easily cause the material to spill and create a safety hazard, which is not conducive to the 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 purpose of this invention is to provide a head spiral tensioning device to solve the problems mentioned in the background art.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a head spiral tensioning device, comprising:

[0009] The frame contains support rollers, drive rollers, guide rollers, and fixed rollers.

[0010] The belt is located inside the frame and passes sequentially through the outer sides of the drive roller, guide roller, and stationary roller;

[0011] A movable head frame is located at one end inside the frame and can slide inside the frame. The inner end of the movable head frame is provided with a tensioning roller for guiding the belt.

[0012] A threaded sleeve is mounted inside the head movable frame via a fixing plate. The threaded sleeve has a drive screw inside, and the drive screw is located inside the frame.

[0013] An extension frame is located inside the frame and below the head movable frame. One end of the extension frame is provided with a movable roller for following the movement of the tension roller.

[0014] Preferably, a support plate is located on the outside of the head movable frame;

[0015] The slider and the slide rail are provided. The slider is located at the bottom end of the support plate and the slide rail is located on the outside of the extension frame. The slider and the slide rail limit the sliding range of the head movable frame above the extension frame.

[0016] A rack, located inside the slide rail, can move up and down;

[0017] The toothed groove is located at the bottom of the slider. The rack and toothed groove are used to limit the synchronous movement of the head movement frame and the extension frame.

[0018] Preferably, a slot is provided at the bottom end of the slide rail, the slot being used to restrict the up-and-down movement of the rack;

[0019] A fixing block is located at the bottom outer side of the extension frame, and a tension spring is provided between the fixing block and the rack;

[0020] The pressure block is located in a through groove at the bottom of the outer side of the extension frame. The pressure block can slide horizontally in the through groove and squeeze the rack to make it slide upward.

[0021] Preferably, the movable block is located inside the extension frame and is disposed at one end of the pressure block;

[0022] The movable seat is located inside the extension frame and connected to the movable block via a connecting arm;

[0023] An adjusting screw is threaded into the middle of the movable seat and located inside the extension frame, and an adjusting motor is provided at one end of the adjusting screw.

[0024] Preferably, the limiting rod is located outside the movable seat and can slide horizontally with the movable seat;

[0025] The limiting groove is provided in multiple places and is located on the outside of the frame. The limiting rod and the limiting groove can limit the position of the extension frame inside the frame.

[0026] Preferably, the first guide rod is located on the outside of the head movable frame and is disposed in the first guide groove opened on the outside of the frame;

[0027] The second guide rod is located on the outside of the extension frame and is located in the second guide groove opened on the outside of the frame.

[0028] Preferably, the drive motor is located at one end of the drive screw and is mounted inside the frame via a support.

[0029] Preferably, one end of the drive roller is equipped with a power motor, and the portion of the belt located between the drive roller and the guide roller is inclined.

[0030] Preferably, the end of the pressing block is provided as an upward inclined structure, and one end of the pressing block is provided with a rounded corner.

[0031] Preferably, both the first guide groove and the second guide groove are designed to be horizontal.

[0032] The technical effects and advantages of this invention are as follows:

[0033] 1. This invention provides a head movable frame inside the machine frame, with a tension roller inside the head movable frame. The tension roller can adjust the belt tension as it slides horizontally with the head movable frame. The entire head movable frame can slide inside the machine frame to adjust the belt tension. Furthermore, the inward sliding of the head movable frame is not affected by the small external space, and the inward retraction of the head movable frame can reduce the volume occupied by the device. While achieving belt tension adjustment, it also facilitates the maintenance of the device.

[0034] 2. This invention features an extension frame inside the machine frame, with a movable roller inside the extension frame. The movable roller can move with the tension roller or remain stationary while the tension roller moves. When adjusting the belt tension, the movable roller remains stationary while the tension roller moves to adjust the belt tension. When the belt conveyor is under maintenance, the tension roller and the movable roller can move synchronously. This allows for adjustment of the tension roller's position without affecting the belt tension, thus preventing residual material from spilling from the belt surface and ensuring the stability of the device during maintenance.

[0035] 3. This invention provides a threaded sleeve inside the movable head frame, with a drive screw inside the threaded sleeve. The drive screw and the threaded sleeve work together to adjust the position of the movable head frame, thereby adjusting the position of the tension roller. Furthermore, after adjusting the position of the movable head frame, the drive screw and the threaded sleeve can lock its position to ensure the stability of the tension roller after adjustment. Moreover, since both the drive screw and the threaded sleeve are located inside the frame, they are not easily affected by small external spaces, making the device easier to use. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0037] Figure 2 This is a side view of the overall structure of the present invention.

[0038] Figure 3 This is a cross-sectional view of the overall structure of the present invention.

[0039] Figure 4 This is a side sectional view of the overall structure of the present invention.

[0040] Figure 5 This is a schematic diagram of the internal structure of the frame of the present invention.

[0041] Figure 6 This is a schematic diagram of the head movement frame and extension frame structure of the present invention.

[0042] Figure 7 This is a schematic diagram of the extension frame structure of the present invention.

[0043] Figure 8 This is a side view of the extension frame structure of the present invention.

[0044] Figure 9 This is a schematic diagram of the head movement frame structure of the present invention.

[0045] Figure 10 This is a side view of the head movement frame and extension frame structure of the present invention.

[0046] In the diagram: 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. Fixing block; 353. Tension spring; 36. Tooth groove; 37. Threaded sleeve; 371. Fixing 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. Limiting rod; 441. Limiting groove; 45. Movable seat; 46. Connecting arm; 47. Adjusting screw; 48. Adjusting motor; 49. Second guide rod; 491. Second guide groove. Detailed Implementation

[0047] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0048] like Figures 1 to 10 As shown, the head spiral tensioning device provided by the present invention is essentially a device that can slide at the head of the conveyor belt to adjust the tension of the conveyor belt 2. A head movable frame 3 is provided at one end of the frame 1. The head movable frame 3 is provided with a tensioning roller 31 for adjusting the tension of the belt 2. 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 tension. An extension frame 4 is provided below the head movable frame 3. The extension frame 4 is provided with a movable roller 41. When adjusting the tension of the belt 2, the movable roller 41 remains stationary, while the tensioning roller 31 can pull the belt 2 to adjust its tension. When the device is inspected by adjusting the position of the tensioning roller 31, the head movable frame 3 and the extension frame 4 can move synchronously. The tension 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 and facilitating the maintenance of the device.

[0049] In terms of specific structural installation, the structural body can be constructed according to the inventive concept of this embodiment. In this embodiment, no special limitations are imposed.

[0050] In this embodiment, a head spiral tensioning device includes:

[0051] The frame 1 has a support roller 11, a drive roller 12, a guide roller 13 and a fixed roller 14 inside. One end of the drive roller 12 is equipped with a power motor. The belt 2 is inclined between the drive roller 12 and the guide roller 13.

[0052] The belt 2 is located inside the frame 1 and passes sequentially through the drive roller 12, the guide roller 13 and the outside of the fixed roller 14;

[0053] The head movable frame 3 is located at one end inside the frame 1 and can slide inside the frame 1. The head movable frame 3 is provided with a tension roller 31 for guiding the belt 2 at one end inside the frame 1.

[0054] A threaded sleeve 37 is installed inside the head movable frame 3 via a fixing plate 371. A drive screw 372 is installed inside the threaded sleeve 37 and is installed inside the frame 1. A drive motor 373 is located at one end of the drive screw 372 and is installed inside the frame 1 via a support 374.

[0055] Support plate 32, which is located on the outside of head movable frame 3;

[0056] The slider 33 is located at the bottom of the support plate 32, and the slide rail 34 is located on the outside 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.

[0057] The rack 35 is located inside the slide rail 34 and can move up and down;

[0058] The toothed groove 36 is located at the bottom end of the slider 33. The rack 35 and the toothed groove 36 are used to limit the synchronous movement of the head movement frame 3 and the extension frame 4.

[0059] Slot 351 is located at the bottom end of slide rail 34 and is used to restrict the up and down movement of rack 35;

[0060] A fixing block 352 is located at the bottom outer side of the extension frame 4. A tension spring 353 is provided between the fixing 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.

[0061] The first guide rod 38 is located on the outside of the head movable frame 3 and is located in the first guide groove 381 opened on the outside of the frame 1.

[0062] The extension frame 4 is located inside the frame 1 and below the head movable frame 3. One end of the extension frame 4 is provided with a movable roller 41 for following the movement of the tension roller 31.

[0063] The pressure block 43 is located in the through groove 431 at the bottom of the outer side of the extension frame 4. The pressure block 43 can slide horizontally in the through groove 431 and press the rack 35 to slide upward.

[0064] The movable block 42 is located inside the extension frame 4 and is located at one end of the pressure block 43. The end of the pressure block 43 is designed to be inclined upward, and one end of the pressure block 43 is designed to have rounded corners. The rounded corners facilitate the pressure block 43 to press the rack 35 and make it move upward.

[0065] The movable seat 45 is located inside the extension frame 4 and is connected to the movable block 42 via the connecting arm 46;

[0066] An adjusting screw 47 is threaded into the middle of the movable seat 45 and located inside the extension frame 4. One end of the adjusting screw 47 is equipped with an adjusting motor 48.

[0067] The limiting rod 44 is located outside the movable seat 45 and can slide horizontally with the movable seat 45;

[0068] The limiting groove 441 is provided in multiple ways and is located 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 within the frame 1.

[0069] The second guide rod 49 is located on the outside of the extension frame 4 and is located in the second guide groove 491 opened on the outside of the frame 1. Both the first guide groove 381 and the second guide groove 491 are horizontal structures. The first guide groove 381 and the second guide groove 491 can restrict the movement trajectory of the head movable frame 3 and the extension frame 4, so that they can only move horizontally.

[0070] When using a head spiral tensioning device according to this embodiment, the belt 2 passes through the support roller 11, drive roller 12, guide roller 13, fixed roller 14, movable roller 41 and tensioning roller 31 in one pass;

[0071] When adjusting the tension of belt 2, drive motor 373 can drive drive screw 372 to rotate. Drive screw 372 cooperates with threaded sleeve 37, so that threaded sleeve 37 can drive head movable frame 3 to slide horizontally. Head movable frame 3 can drive tension roller 31 to move, so that the tension of belt 2 can be adjusted. During this process, rack 35 separates from tooth groove 36 under the action of tension spring 353, and limit rod 44 is inserted into limit groove 441. At this time, extension frame 4 and head movable frame 3 move independently, and the position of extension frame 4 is kept fixed under the restriction of limit rod 44 and limit groove 441. At this time, the movement of tension roller 31 can adjust the tension of belt 2.

[0072] When adjusting the position of the tension roller 31 for maintenance and cleaning, the adjusting motor 48 drives the adjusting screw 47 to move. The adjusting screw 47, under the action of the thread, drives the movable seat 45 to move. The movable seat 45 can drive the pressure block 43 and the limiting rod 44 to move, so that the pressure block 43 and the limiting rod 44 move towards the extension frame 4. At this time, the limiting rod 44 separates from the limiting groove 441, and the pressure block 43 can squeeze the rack 35, so that the rack 35 moves upward and inserts into the tooth groove 36. At this time, the limiting of the extension frame 4 is released, and linkage with the head movable frame 3 is realized. When the head movable frame 3 moves, it can drive the extension frame 4 to move, so that the tension roller 31 and the movable roller 41 move simultaneously. At this time, the position adjustment of the tension roller 31 is realized without affecting the tension of the belt 2, so as to avoid the safety hazard caused by the spillage of residual material above the belt 2.

[0073] Finally, it should be noted that the above description 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 foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A head-mounted spiral tensioning device, characterized in that, include: The frame (1) is equipped with a support roller (11), a drive roller (12), a guide roller (13) and a fixed roller (14). The belt (2) is located inside the frame (1) and passes in sequence outside the drive roller (12), guide roller (13) and fixed roller (14); The head movable frame (3) is located at one end inside the frame (1) and can slide inside the frame (1). The head movable frame (3) has a tension roller (31) for guiding the belt (2) at one end inside. A threaded sleeve (37) is provided inside the head movable frame (3) via a fixing plate (371). The threaded sleeve (37) is provided with a drive screw (372), which is located inside the frame (1). An extension frame (4) is located inside the frame (1) and below the head movable frame (3). One end of the extension frame (4) is provided with a movable roller (41) for following the movement of the tension roller (31). Support plate (32), which is located on the outside of the head movable frame (3); The slider (33) and the slide rail (34) are located at the bottom of the support plate (32) and the slide rail (34) is located on the outside 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) is located inside the slide rail (34) and can move up and down; The toothed groove (36) is located at the bottom end of the slider (33). The rack (35) and the toothed groove (36) are used to restrict the head movement frame (3) from moving synchronously with the extension frame (4). A slot (351) is provided at the bottom end of the slide rail (34), the slot (351) being used to restrict the up-and-down movement of the rack (35); A fixing block (352) is located at the bottom outer side of the extension frame (4), and a tension spring (353) is provided between the fixing block (352) and the rack (35). The pressure block (43) is located in the through groove (431) at the bottom of the outer side of the extension frame (4). The pressure block (43) can slide horizontally in the through groove (431) and squeeze the rack (35) to make it slide upward. The movable block (42) is located inside the extension frame (4) and is located at one end of the pressure block (43); The movable seat (45) is located inside the extension frame (4) and connected to the movable block (42) via the connecting arm (46); An adjusting screw (47) is threaded into the middle of the movable seat (45) and located inside the extension frame (4). One end of the adjusting screw (47) is provided with an adjusting motor (48).

2. The head spiral tensioning device according to claim 1, characterized in that, Also includes: The limiting rod (44) is located outside the movable seat (45) and can slide horizontally with the movable seat (45); The limiting groove (441) is provided in multiple places and is located 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) within the frame (1).

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

4. The head spiral tensioning device according to claim 1, characterized in that, Also includes: The drive motor (373) is located at one end of the drive screw (372) and is mounted inside the frame (1) via a support (374).

5. The head spiral tensioning device according to claim 1, characterized in that, Also includes: One end of the drive roller (12) is equipped with a power motor, and the part of the belt (2) located between the drive roller (12) and the guide roller (13) is inclined.

6. The head spiral tensioning device according to claim 1, characterized in that, Also includes: The end of the pressure block (43) is designed to be inclined upwards, and one end of the pressure block (43) is designed to have rounded corners.

7. A head spiral tensioning device according to claim 3, characterized in that, Also includes: Both the first guide groove (381) and the second guide groove (491) are designed to be horizontal.

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