Screw conveyer capable of preventing feeding overload

Abstract

The screw conveyor comprises a conveyor body, a screw auger is arranged in the conveyor body, an output shaft of a power motor is connected with a power shaft through an anti-overloading connecting piece, the anti-overloading connecting piece comprises a first connecting ring and a second connecting ring, a plurality of positioning grooves are formed in the inner ring face of the first connecting ring at equal intervals, and the second connecting ring is connected with the first connecting ring. A strong spring and an anti-overloading part are arranged in the positioning groove, the anti-overloading part is provided with an anti-overloading head, the second connecting ring is provided with an anti-overloading groove, the anti-overloading head is partially inserted into the anti-overloading groove, and the contact position of the anti-overloading head and the anti-overloading groove is of a slope structure; before materials are overloaded, the overload protection head can be completely separated from a bridge losing transmission among the overload protection groove, the first connecting ring and the second connecting ring, and the power motor and the output shaft cannot be damaged; and after the overload condition is solved, the overload protection piece and the overload protection head can be reset under the pressure of the strong spring and can be continuously used.

Description

Technical Field

[0001] The utility model belongs to the technical field of screw conveyors, and particularly relates to a screw conveyor capable of preventing material feeding from being overloaded. Background Art

[0002] A screw conveyor is a machine that uses a motor to drive the screw to rotate and push materials to achieve the purpose of conveying. It can convey materials horizontally, inclined, or vertically. It has the advantages of simple structure, small cross-sectional area, good sealing, easy operation and maintenance, and convenient closed transportation.

[0003] When the screw conveyor is conveying materials, the materials will be added into the screw conveyor through the feeding funnel. When the feeding overload occurs, since the conveying of the screw conveyor is driven by the motor, the load is limited. When the feeding overload occurs, the motor is easily damaged. Utility Model Content

[0004] The utility model provides a screw conveyor that prevents material from being overloaded. Before the material is overloaded, the anti-overload head can be completely separated from the anti-overload groove, and the transmission bridge between the first connecting ring and the second connecting ring is lost, so that the power motor and the output shaft will not be damaged; after the overload situation is resolved, the anti-overload part and the anti-overload head can be reset under the pressure of a strong spring and continue to be used, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned objectives, the utility model provides the following technical solutions: a screw conveyor for preventing overload in loading, comprising a conveyor body, a spiral auger installed in the conveyor body, a power shaft of the spiral auger extending outside the conveyor body, a feeding funnel and a discharge port being provided on the conveyor body, a power motor being installed outside the conveyor body, the output shaft of the power motor being connected to the power shaft through an anti-overload connecting piece, the anti-overload connecting piece comprising a first connecting ring fixed to the end of the power shaft and a second connecting ring welded to the outer end of the output shaft, the inner ring surface of the first connecting ring being equally divided into a plurality of positioning grooves, a strong spring and an anti-overload part being installed in the positioning groove, the anti-overload part being provided with an anti-overload head, the second connecting ring being provided with an anti-overload groove corresponding to the anti-overload head, the anti-overload head being partially inserted in the anti-overload groove, the width of the anti-overload head gradually decreasing towards the end, so that a slope structure is formed at the contact point with the anti-overload groove.

[0006] Preferably, the first connecting ring is provided with a mounting edge, the mounting edge is provided with a plurality of spaced mounting holes, and is fixedly connected to the power shaft by fastening screws.

[0007] Preferably, an annular rib is provided on the outer wall of the second connecting ring, and the annular rib is located on both sides of the anti-overload groove, and the annular rib is in smooth and close contact with the anti-overload head.

[0008] Preferably, a first blocking groove is provided in the front of the overload prevention member. An extrusion spring and a blocking block are installed in the first blocking groove. The first connecting ring is provided with a second blocking groove. When the overload prevention head just disengages from the overload prevention groove, the second blocking groove is aligned with the bottom end of the first blocking groove.

[0009] Preferably, a through hole communicating with the second blocking groove is provided on the front side of the first connecting ring.

[0010] Preferably, the height of the second blocking groove is greater than the height of the first blocking groove.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0012] 1. Before the material is overloaded, the overload prevention head can completely disengage from the overload prevention groove, and the bridge for transmission between the first connecting ring and the second connecting ring is lost, so the power motor and the output shaft will not be damaged.

[0013] 2. After the overload situation is solved, the blocking block can be pressed back into the first blocking groove through the through hole by an external component, and then the overload prevention member and the overload prevention head can be reset under the pressure of the strong spring and continue to be used. Description of the Drawings

[0014] Figure 1 is the front sectional structure schematic diagram of the present utility model;

[0015] Figure 2 is the structure schematic diagram of the overload prevention connecting member of the present utility model;

[0016] Figure 3 is the sectional structure schematic diagram of the overload prevention connecting member of the present utility model;

[0017] Figure 4 is Figure 3 the enlarged structure schematic diagram at A of

[0018] Figure 5 is the side view structure schematic diagram of the second connecting ring of the present utility model;

[0019] Figure 6 is the partial sectional structure schematic diagram of the present utility model.

[0020] In the figure: 1. Conveyor body; 2. Screw auger; 3. Power shaft; 4. Feeding hopper; 5. Discharge port; 6. Power motor; 7. Output shaft; 8. Anti-overload connecting piece; 9. First connecting ring; 10. Second connecting ring; 11. Positioning groove; 12. Strong spring; 13. Anti-overload piece; 14. Anti-overload head; 15. Anti-overload groove; 16. Mounting edge; 17. Mounting hole; 18. Fastening screw; 19. Annular retaining edge; 20. First blocking groove; 21. Extrusion spring; 22. Blocking block; 23. Second blocking groove; 24. Through hole. Detailed implementation mode

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0022] Please refer to Figures 1-6, the present utility model provides a screw conveyor for preventing overloading during feeding, including a conveyor body 1. A screw auger 2 is installed inside the conveyor body 1, and a power shaft 3 of the screw auger 2 extends outside the conveyor body 1. A feeding hopper 4 and a discharge port 5 are provided on the conveyor body 1. A power motor 6 is installed outside the conveyor body 1, and an output shaft 7 of the power motor 6 is connected to the power shaft 3 through an anti-overload connecting member 8. The anti-overload connecting member 8 includes a first connecting ring 9 fixed to the end of the power shaft 3 and a second connecting ring 10 welded to the outer end of the output shaft 7. A plurality of positioning grooves 11 are equally spaced on the inner ring surface of the first connecting ring 9. A strong spring 12 and an anti-overload member 13 are installed in the positioning grooves 11. The anti-overload member 13 is provided with an anti-overload head 14. The second connecting ring 10 is provided with an anti-overload groove 15 corresponding to the anti-overload head 14. The anti-overload head 14 is partially inserted into the anti-overload groove 15, and the width of the anti-overload head 14 gradually decreases towards the end, so that the contact portion with the anti-overload groove 15 is a slope structure. When in use, when the conveyor body 1 conveys materials, the materials will be added into it through the feeding hopper 4. When overloading occurs during feeding, since the screw auger 2 is driven to convey through the power shaft 3, and the power shaft 3 is driven to rotate by the power motor 6 and the output shaft 7, and then screw feeding is carried out. When overloading occurs due to overloading during feeding, since the power shaft 3 is driven by the power motor 6, the output shaft 7 and the anti-overload connecting member 8, the anti-overload connecting member 8 provides an intermediate force transmission function. The overloaded materials will first give a large resistance to the screw auger 2, and then be transmitted to the first connecting ring 9 through the power shaft 3. The first connecting ring 9 and the second connecting ring 10 transmit torque through the anti-overload member 13 and the anti-overload head 14, and the contact portion between the anti-overload head 14 and the anti-overload groove 15 is a slope structure. When the resistance increases, the anti-overload head 14 gradually disengages from the anti-overload groove 15, and the anti-overload member 13 will squeeze the strong spring 12. During equipment production, through pre-testing, before the materials are overloaded, the anti-overload head 14 can completely disengage from the anti-overload groove 15. When the anti-overload head 14 disengages from the anti-overload groove 15, the bridge for transmission between the first connecting ring 9 and the second connecting ring 10 is lost, and the power motor 6 and the output shaft 7 will not be damaged.

[0023] Specifically, the first connecting ring 9 is provided with a mounting edge 16. A plurality of spaced mounting holes 17 are provided on the mounting edge 16, and it is fixedly connected to the power shaft 3 through fastening screws 18. In this embodiment, the first connecting ring 9 and the power shaft 3 can be conveniently assembled and disassembled through the fastening screws 18.

[0024] Specifically, an annular stop edge 19 is provided on the outer wall of the second connecting ring 10. The annular stop edge 19 is located on both sides of the anti-overload groove 15, and the annular stop edge 19 is in smooth contact with the anti-overload head 14. In this embodiment, after the anti-overload head 14 disengages from the anti-overload groove 15, the anti-overload head 14 still moves within the annular stop edge 19, thereby keeping the front and rear positions of the first connecting ring 9 and the second connecting ring 10 unchanged, which is beneficial for the subsequent reinsertion of the anti-overload head 14 into the anti-overload groove 15 for use.

[0025] Specifically, the anti-overload member 13 is provided with a first blocking groove 20 facing forward. A compression spring 21 and a blocking block 22 are installed in the first blocking groove 20. The first connecting ring 9 is provided with a second blocking groove 23. When the anti-overload head 14 just disengages from the anti-overload groove 15, the second blocking groove 23 is aligned with the bottom end of the first blocking groove 20. In this embodiment, after the anti-overload head 14 disengages from the anti-overload groove 15, the first blocking groove 20 corresponds to the second blocking groove 23, so that the blocking block 22 will partially enter the second blocking groove 23 under the extrusion of the compression spring 21, thereby preventing the anti-overload member 13 and the anti-overload head 14 from returning and avoiding the interference of their return with the idling of the output shaft 7 driven by the power motor 6.

[0026] Specifically, a through hole 24 communicating with the second blocking groove 23 is provided on the front side of the first connecting ring 9. In this embodiment, when the overload situation is resolved, the blocking block 22 can be pressed back into the first blocking groove 20 through the through hole 24 by an external member, and then the anti-overload member 13 and the anti-overload head 14 can be reset under the pressure of the strong spring 12.

[0027] Specifically, the height of the second blocking groove 23 is greater than the height of the first blocking groove 20. In this embodiment, after the anti-overload head 14 disengages from the anti-overload groove 15, the rising height of the anti-overload member 13 is not unique. Through the design that the height of the second blocking groove 23 is greater than the height of the first blocking groove 20, it can be realized that when the bottom end of the first blocking groove 20 exceeds the bottom end of the second blocking groove 23 at different heights, the blocking block 22 will partially enter the second blocking groove 23 under the extrusion of the compression spring 21.

[0028] To facilitate the understanding of the above technical solutions of the present invention, the working principle or operation method of the present invention in the actual process will be described in detail below.

[0029] Working principle: During use, when the conveyor body 1 conveys materials, the materials will be added into it through the feeding hopper 4. When overloading occurs during feeding, since the spiral auger 2 is driven to convey through the power shaft 3, and the power shaft 3 is driven to rotate by the power motor 6 and the output shaft 7, and then spiral feeding is carried out.

[0030] When overload occurs during feeding overload, since the power shaft 3 is driven by the power motor 6 and the output shaft 7 in cooperation with the overload protection connecting piece 8, the overload protection connecting piece 8 provides an intermediate force transmission function. The overload material of the overload will first give a large resistance to the spiral auger 2, and then be transmitted to the first connecting ring 9 through the power shaft 3.

[0031] The first connecting ring 9 and the second connecting ring 10 transmit torque through the overload protection piece 13 and the overload protection head 14. The contact between the overload protection head 14 and the overload protection groove 15 is a slope structure. When the resistance increases, the overload protection head 14 gradually disengages from the overload protection groove 15, and the overload protection piece 13 will squeeze the strong spring 12. During the production of the equipment, through pre-testing, before the material overloads, the overload protection head 14 can completely disengage from the overload protection groove 15. When the overload protection head 14 disengages from the overload protection groove 15, the bridge for transmission between the first connecting ring 9 and the second connecting ring 10 is lost, and the power motor 6 and the output shaft 7 will not be damaged. At this time, the first blocking groove 20 corresponds to the second blocking groove 23, so that the blocking block 22 will partially enter the second blocking groove 23 under the extrusion of the compression spring 21, so that the overload protection piece 13 and the overload protection head 14 cannot return. When the overload situation is resolved, the blocking block 22 can be pressed back into the first blocking groove 20 through the through hole 24 by an external part, and then the overload protection piece 13 and the overload protection head 14 can be reset under the pressure of the strong spring 12.

[0032] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A screw conveyor for preventing overloading of feeding, comprising a conveyor body (1), characterized in that, The conveyor body (1) is equipped with a spiral auger (2). The power shaft (3) of the spiral auger (2) extends outside the conveyor body (1). The conveyor body (1) is provided with a feeding hopper (4) and a discharge port (5). A power motor (6) is installed outside the conveyor body (1). The output shaft (7) of the power motor (6) is connected to the power shaft (3) through an anti-overload connecting member (8). The anti-overload connecting member (8) includes a first connecting ring (9) fixed to the end of the power shaft (3) and a second connecting ring (10) welded to the outer end of the output shaft (7). The inner ring surface of the first connecting ring (9) is equally divided into a plurality of positioning grooves (11). A strong spring (12) and an anti-overload member (13) are installed in the positioning groove (11). The anti-overload member (13) is provided with an anti-overload head (14). The second connecting ring (10) is provided with an anti-overload groove (15) corresponding to the anti-overload head (14). The anti-overload head (14) is partially inserted into the anti-overload groove (15). The width of the anti-overload head (14) gradually decreases towards the end, so that the contact part with the anti-overload groove (15) is a slope structure.

2. The spiral conveyor for preventing overloading of feeding according to claim 1, wherein, The first connecting ring (9) is provided with a mounting edge (16). A plurality of spaced mounting holes (17) are provided on the mounting edge (16) and are fixedly connected to the power shaft (3) through fastening screws (18).

3. The spiral conveyor for preventing overloading of feeding according to claim 1, wherein, The outer wall of the second connecting ring (10) is provided with an annular retaining edge (19). The annular retaining edge (19) is located on both sides of the anti-overload groove (15). The annular retaining edge (19) is in smooth contact with the anti-overload head (14).

4. A screw conveyor for preventing overloading of feeding, characterized in that The anti-overload member (13) is provided with a first blocking groove (20) facing forward. A compression spring (21) and a blocking block (22) are installed in the first blocking groove (20). The first connecting ring (9) is provided with a second blocking groove (23). When the anti-overload head (14) just disengages from the anti-overload groove (15), the second blocking groove (23) is aligned with the bottom end of the first blocking groove (20).

5. The screw conveyor for preventing overloading of feeding according to claim 4, characterized in that, A through hole (24) communicating with the second blocking groove (23) is provided on the front side of the first connecting ring (9).

6. A screw conveyor for preventing overloading of feeding, characterized in that, The height of the second blocking groove (23) is greater than the height of the first blocking groove (20).

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