CN215247552U - Worm wheel screw spiral tensioning device - Google Patents

Abstract

The utility model discloses a worm gear screw spiral tensioning device, wherein the two ends of a roller are respectively provided with a tensioning frame, the tensioning frames are in a rectangular structure, bearing blocks at the two ends of the roller are respectively positioned in the corresponding tensioning frames and slide along the radial direction of the tensioning frames, the front end of each tensioning frame is provided with a spiral case, the inner end of the screw passes through the spiral case and is rotationally connected with the bearing blocks, and the upper part of the spiral case is provided with a hand wheel for driving a worm gear inside the spiral case and the screw to perform worm transmission; the utility model discloses utilize worm driven mode, not only make the tensioning of belt more convenient laborsaving, do not have and utilize the worm wheel to realize the auto-lock with the meshing of screw rod after the belt tensioning moreover, self-locking power is big, has guaranteed lasting effective of tensioning operation, has improved very big facility for the tensioning of belt feeder.

Description

Worm wheel screw spiral tensioning device

Technical Field

The utility model relates to a belt conveyor technical field especially relates to a worm wheel screw rod spiral straining device.

Background

The tensioning device of the belt conveyor is an important component for ensuring that the conveying belt has certain tensioning force and preventing the conveying belt from slipping, the existing tensioning device mainly comprises a spiral tensioning device, a vertical tensioning device, a heavy hammer vehicle type tensioning device, a steel wire rope winch type tensioning device, an electric control type automatic tensioning device and a hydraulic type automatic tensioning device, and a spiral tensioning mode is mostly adopted on a conveyor with a conveying distance of less than 100m and smaller driving power and has the advantages of simple structure, convenient operation, small occupied space, high cost performance and the like, however, in practical application, the spiral tensioning device has large friction resistance due to sliding friction between a bearing mounting frame and a sliding rail, time and labor are wasted in manual adjustment, the two ends of a roller are difficult to adjust respectively to ensure synchronization, the belt is easy to deviate, and the condition that the belt cannot be twisted often occurs when the tensioning device is not well installed or is seriously corroded, resulting in the failure to smoothly perform the belt tensioning operation.

SUMMERY OF THE UTILITY MODEL

In order to overcome not enough among the background art, the utility model discloses a worm wheel screw spiral straining device, the utility model discloses utilize worm driven mode, not only make the tensioning of belt more convenient laborsaving, do not have and utilize the worm wheel to realize the auto-lock with the meshing of screw rod after the belt tensioning, self-locking power is big, has guaranteed lasting effective of tensioning operation, has improved very big facility for the tensioning of belt feeder.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the worm gear screw spiral tensioning device comprises a roller and bearing seats, wherein tensioning frames are arranged at two ends of the roller respectively and are of a rectangular structure, the bearing seats at two ends of the roller are located in the corresponding tensioning frames respectively and slide along the radial direction of the tensioning frames, a spiral case is arranged at the front end of each tensioning frame, the inner end of a screw penetrates through the spiral case and is rotatably connected with the bearing seats, and a hand wheel for driving a worm gear and the screw in the spiral case to perform worm transmission is arranged at the upper part of the spiral case.

Furthermore, the upper part and the lower part of the bearing seat are both provided with grooves, the two ends of each groove are of open structures, and the upper inner wall and the lower inner wall of the tensioning frame are respectively provided with a sliding rail in sliding fit with the grooves.

Furthermore, the volute is rotatably connected with an input shaft extending into the volute, a worm wheel meshed with the screw rod is arranged on the shaft body of the input shaft in the volute, and a hand wheel is arranged at the outer end of the input shaft.

Furthermore, the volute is rotatably connected with an input shaft, the input shaft penetrates in from the volute at one end of the roller and penetrates out from the volute at the other end of the roller, worm wheels meshed with the screw rods are arranged on the shaft bodies of the input shafts in the volutes at two ends of the roller, and hand wheels are arranged at two ends of the input shaft.

Furthermore, the inner end of the screw rod is provided with a detachable connecting rod, and the connecting rod is rotatably connected with the bearing seat through a bearing or a universal joint.

Furthermore, a guide plate is arranged in the tensioning frame, and a guide screw hole matched with the screw rod is formed in the guide plate.

Compared with the prior art, the beneficial effects of the utility model are that: the worm wheel structure is driven by the rotating hand wheel to transmit the screw rod, so that the belt tensioning operation is realized, the roller is more convenient and labor-saving when tensioned, the worm wheel and the screw rod are meshed to realize self-locking, the self-locking force is large, the roller is not easy to slide, and the firmness and effectiveness of belt tensioning are ensured;

the groove on the roller bearing seat is utilized, so that the bearing seat can be clamped and placed on the tensioning frame slide rail more conveniently and conveniently, the roller is connected with the screw rod through the connecting rod, the traditional mode that the roller is fixed on the slide block through a bolt is avoided, and the installation and the maintenance are convenient;

the guide plate and the guide screw hole can ensure that the screw rod is in a horizontal state, so that the screw rod is prevented from inclining, and powerful guarantee is provided for the subsequent worm transmission of the worm wheel and the screw rod;

the mode that the volutes at the two ends of the roller share one input shaft enables the bearing seats at the two ends of the roller to synchronously move when the belt tensioning operation is carried out, thereby ensuring that the roller can move in parallel and avoiding influencing the normal operation of the belt conveyor;

the utility model discloses utilize worm driven mode, not only make the tensioning of belt more convenient laborsaving, do not have and utilize the worm wheel to realize the auto-lock with the meshing of screw rod after the belt tensioning moreover, self-locking power is big, has guaranteed lasting effective of tensioning operation, has improved very big facility for the tensioning of belt feeder.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a front view of the present invention;

FIG. 3 is a schematic view of the volute structure of the present invention;

fig. 4 is a schematic view of the bearing seat structure of the present invention.

In the figure: 1. a hand wheel; 2. a front baffle; 3. a guide plate; 4. a slide rail; 5. a tension frame; 6. a drum; 7. a bearing seat; 8. a connecting rod; 9. a screw; 10. a guide screw hole; 11. a volute; 12. an input shaft; 13. a groove; 14. a connector; 15. and a bearing.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-4, the present invention provides a technical solution:

in the first embodiment, referring to fig. 1 and 2, a worm gear-screw spiral tensioning device includes a roller 6 and bearing seats 7, two ends of the roller 6 are respectively provided with a tensioning frame 5, the tensioning frame 5 is in a rectangular structure, upper and lower inner walls of the tensioning frame 5 are respectively provided with a sliding rail 4 distributed along the radial direction of the tensioning frame 5, the bearing seats 7 at two ends of the roller 6 are respectively located in the corresponding tensioning frames 5, upper and lower portions of the bearing seats 7 are respectively provided with a groove 13 which is adapted to the corresponding sliding rail 4 and has two open ends, the two bearing seats 7 transversely slide in the tensioning frame 5 along the sliding rail 4, so as to drive the roller 6 to move to realize the tensioning operation of a belt, in order to realize the sliding adjustment of the two bearing seats 7, the outer wall of a front baffle 2 at the front end of the tensioning frame 5 is provided with a spiral casing 11, the inner end of a screw 9 penetrates through the spiral casing 11 and is rotatably connected with the bearing seats 7, the spiral casing 11 is rotatably connected with an input shaft 12 extending into the spiral casing 11, the shaft body of an input shaft 12 in the volute 11 is provided with a worm wheel meshed with the screw rod 9, and the outer end of the input shaft 12 is provided with a hand wheel 1 for driving the worm wheel in the volute 11 to perform worm transmission with the screw rod 9.

In the second embodiment, referring to fig. 1, the inner end of the screw 9 is hinged to one end of the connecting rod 8, the inner side of the bearing seat 7 is provided with the connector 14, the connector 14 is fixedly connected to the outer ring of the bearing 15, the other end of the connecting rod 8 is fixedly connected to the inner diameter of the inner ring of the bearing 15, the bearing 15 is used for realizing the rotating fit of the screw 9 and the bearing seat 7, or the other end of the connecting rod 8 is rotatably fitted with the bearing seat 7 through a universal joint, so that support is provided for the subsequent rotation of the screw 9, the connecting rod 8 which is hinged to the connecting rod is used for realizing the disassembly between the screw 9 and the bearing seat 7, and convenience is provided for the subsequent maintenance.

In the third embodiment, please refer to fig. 1, since one end of the screw 9 is hinged to the connecting rod 8, the screw 9 is horizontally supported only by the volute 11, in order to avoid the influence of the inclination of the screw 9 on the subsequent fit with the worm wheel in the volute 11, the guide plate 3 is arranged in the tension frame 5, and the guide plate 3 is provided with the guide screw hole 10 corresponding to the screw hole on the volute 11.

In the fourth embodiment, referring to fig. 2, the two ends of the drum 6 are respectively provided with the tensioning frames 5, so that when the belt is tensioned and adjusted, the bearing seats 7 at the two sides of the drum 6 need to be adjusted at the same time, and when the belt is adjusted, the hand wheels 1 at the two ends of the drum 6 need to be rotated respectively, which causes that when people adjust manually, it is difficult to ensure that the bearing seats 7 at the two ends of the drum 6 slide at the same distance, if the displacement distances of the bearing seats 7 at the two ends are different, the drum 6 is deviated, and normal operation of the belt conveyor is affected, therefore, the input shaft 12 penetrates into the volute 11 at one end of the drum 6 and penetrates out of the volute 11 at the other end of the drum 6, the shaft bodies of the input shafts 12 in the volute 11 at the two ends of the drum 6 are both provided with worm gears engaged with the screw rods 9, the hand wheels 1 are arranged at the two ends of the input shaft 12, and the volute 11 at the two ends share one input shaft 12, so that when the hand wheel 1 at any end is rotated, the hand wheel 1 at the other end can also rotate along with the belt, so that the bearing blocks 7 in the tensioning frames 5 at the two ends move for the same distance, and powerful support is provided for tensioning the belt.

The details of the present invention not described in detail are prior art, and it will be apparent to those skilled in the art that the present invention is not limited to the details of the above-described exemplary embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof; the present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.

Claims (6)

1. The utility model provides a worm wheel screw spiral straining device, includes cylinder (6) and bearing frame (7), its characterized in that: the two ends of the roller (6) are respectively provided with a tensioning frame (5), the tensioning frames (5) are of a rectangular structure, bearing blocks (7) at the two ends of the roller (6) are respectively located in the corresponding tensioning frames (5) and slide along the radial direction of the tensioning frames (5), the front end of each tensioning frame (5) is provided with a volute (11), the inner end of the screw rod (9) penetrates through the volute (11) and is rotatably connected with the bearing blocks (7), and the upper portion of the volute (11) is provided with a hand wheel (1) which drives a worm wheel in the volute (11) to perform worm transmission with the screw rod (9).

2. The worm gear screw helical tightening device according to claim 1, characterized in that: the upper portion and the lower portion of bearing frame (7) all are equipped with recess (13), and the both ends of recess (13) are open type structure, and the upper and lower inner wall of tensioning frame (5) is equipped with respectively with recess (13) sliding fit's slide rail (4).

3. The worm gear screw helical tightening device according to claim 1, characterized in that: the volute (11) is rotatably connected with an input shaft (12) extending into the volute (11), a worm wheel meshed with the screw rod (9) is arranged on the shaft body of the input shaft (12) in the volute (11), and a hand wheel (1) is arranged at the outer end of the input shaft (12).

4. The worm gear screw helical tightening device according to claim 1, characterized in that: the volute (11) is rotatably connected with an input shaft (12), the input shaft (12) penetrates in from the volute (11) at one end of the roller (6) and penetrates out from the volute (11) at the other end of the roller (6), worm gears meshed with the screw rods (9) are arranged on shaft bodies of the input shaft (12) in the volutes (11) at two ends of the roller (6), and hand wheels (1) are arranged at two ends of the input shaft (12).

5. The worm gear screw helical tightening device according to claim 1, characterized in that: the inner end of the screw rod (9) is provided with a detachable connecting rod (8), and the connecting rod (8) is rotatably connected with the bearing seat (7) through a bearing (15) or a universal joint.

6. The worm gear screw helical tightening device according to claim 1, characterized in that: a guide plate (3) is arranged in the tensioning frame (5), and a guide screw hole (10) matched with the screw rod (9) is formed in the guide plate (3).

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