Belt pulley safety structure

Abstract

The utility model relates to the field of belt pulleys, and discloses a belt pulley safety structure which comprises a transmission box body, a rotating hole is formed in one side of the transmission box body, a bearing is fixed in the rotating hole, a transmission shaft is rotatably inserted in the rotating hole, and the transmission shaft and an inner ring of the bearing are fixedly inserted. A belt pulley body is detachably arranged on the transmission shaft, a storage groove is formed in the surface of the belt pulley body, a grain unloading belt is arranged in the storage groove, a sleeving hole is formed in one side of the belt pulley body, two limiting holes are formed in the sleeving hole, and a mounting bolt is rotationally inserted into the transmission shaft. And one end of the mounting bolt penetrates through the transmission shaft and is rotationally inserted into the limiting hole. According to the scheme, the friction force between the grain unloading belt and the belt wheel body is greatly reduced, the situation that the grain unloading belt is burnt out due to the fact that the friction force is too large can be effectively prevented, and the service life of the grain unloading belt is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of pulleys, in particular to a pulley safety structure. Background Art

[0002] At present, crawler grain combine harvesters in the domestic and foreign markets are mainly divided into longitudinal axial flow combine harvesters and transverse axial flow combine harvesters, both of which are composed of harvesting platform transportation, threshing, granary, chassis, control and hydraulic electrical parts.

[0003] According to the Chinese patent with announcement number: CN220571031U, a ramie combine harvester includes a vehicle plate, a cab is installed on the rear side of the upper surface of the vehicle plate, extension plates are installed on the front and rear sides of the right side surface of the vehicle plate, hook blocks are installed on the upper surfaces of the two extension plates, two pulleys are rotatably installed on the opposite side surfaces of the two hook blocks, the corresponding groups of pulleys are rotatably connected by corresponding belts, the opposite side surfaces of a group of pulleys on the left are fixed together by a connecting shaft, a harvesting mechanism is arranged above the extension plate, a suction box is installed on the front side of the upper surface of the vehicle plate, and a suction mechanism is arranged inside the suction box.

[0004] In the above scheme, a pulley is used to transmit the power for rotating the shaft, which still has the following disadvantages: the pulley may be blocked during unloading, causing the belt to idle for a long time, resulting in overheating and burning of the belt, thereby reducing the service life of the belt. Utility Model Content

[0005] The purpose of the utility model is to provide a pulley safety structure to solve the problem that the pulley may be blocked during unloading, resulting in the belt idling for a long time, causing the belt to overheat and burn, thereby reducing the service life of the belt.

[0006] In order to achieve the above-mentioned purpose of the utility model, the utility model adopts the following technical solutions: a pulley safety structure, including a transmission case, a rotating hole is provided on one side of the transmission case, a bearing is fixed inside the rotating hole, a transmission shaft is rotatably inserted inside the rotating hole, the transmission shaft and the inner ring of the bearing are fixedly inserted, a pulley body is detachably provided on the transmission shaft, a storage groove is provided on the surface of the pulley body, a grain unloading belt is provided inside the storage groove, a sleeve hole is provided on one side of the pulley body, two limiting holes are provided inside the sleeve hole, a mounting bolt is rotatably inserted on the transmission shaft, one end of the mounting bolt passes through the transmission shaft and is rotatably inserted with the limiting hole, and one end of the mounting bolt passes through the limiting hole and is threadedly connected with a nut.

[0007] Preferably, a pulley weld is fixedly inserted on the transmission shaft, a connecting bolt is slidably inserted on the pulley weld, a plurality of connecting holes are opened on one side of the pulley body, one end of the connecting bolt passes through the connecting hole and is threadedly connected to a nut, and a hub is provided on one side of the pulley body.

[0008] Preferably, a stabilizing groove is provided on the inner bottom surface of the transmission housing, a stabilizing bearing is fixed inside the stabilizing groove, an inner ring of the stabilizing bearing is fixedly inserted on the transmission shaft, and a small bevel gear is fixedly inserted on the transmission shaft.

[0009] Preferably, a partition is fixed inside the transmission box, a through hole is opened on one side of the partition, a rotating bearing is fixed inside the through hole, a transmission connecting shaft is fixed to the inner ring of the rotating bearing, a large bevel gear is fixed to one end of the transmission connecting shaft, and the small bevel gear is meshed with the large bevel gear.

[0010] Preferably, a mounting hole is opened on one side of the transmission housing, a grain-discharging auger is fixed to one end of the transmission connecting shaft, and the mounting hole is rotatably inserted with one end of the grain-discharging auger.

[0011] Preferably, a limiting groove is provided inside the sleeve hole, a limiting strip is fixed on the surface of the transmission shaft, and the limiting groove and the limiting strip are slidably arranged.

[0012] Compared with the prior art, a pulley insurance structure adopting the above technical solution has the following beneficial effects:

[0013] 1. When there is a blockage during grain unloading, the unloaded grain may cause the equipment to get stuck, making it impossible for the grain unloading belt to drive the transmission shaft to rotate through the pulley body. When the rotational force reaches the strength limit of the connecting bolts, the mounting bolts will break, causing the pulley body and the transmission shaft to separate. The grain unloading belt drives the pulley to idle, causing the pulley body to rotate without load, greatly reducing the friction between the grain unloading belt and the pulley body, which can effectively prevent the grain unloading belt from burning out due to excessive friction and extend the service life of the grain unloading belt.

[0014] 2. When installing the pulley body on the transmission shaft, the staff will first install the pulley body on the transmission shaft and weld it to the pulley. During this process, the limit strip will slide into the limit groove to preliminarily fix the position of the pulley body on the transmission shaft. Then the staff will pass the connecting bolt through the pulley welding and connecting hole to increase the firmness of the pulley body position.

[0015] 3. The rotating transmission shaft will drive the small bevel gear to rotate synchronously, and the rotating small bevel gear will drive the large bevel gear to rotate synchronously by meshing with the large bevel gear, so as to transmit the rotating force of the rotating pulley body to the grain auger. By increasing the torque, the speed of the grain auger is slowed down, avoiding the grain splattering caused by the excessive speed of the grain auger and preventing waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a cross-sectional schematic diagram of an embodiment.

[0017] Figure 2 Schematic diagram of the cross section of the pulley body of the embodiment.

[0018] Figure 3 It is a cross-sectional schematic diagram of the welding of the pulley body and the pulley of the embodiment.

[0019] Figure 4 It is a front view schematic diagram of the pulley body of the embodiment.

[0020] In the figure: 1. Transmission box; 2. Rotating hole; 3. Transmission shaft; 4. Pulley body; 5. Storage groove; 6. Grain unloading belt; 7. Connection hole; 8. Hub; 9. Pulley welding; 10. Connecting bolt; 11. Stable groove; 12. Stable bearing; 13. Small bevel gear; 14. Partition; 15. Penetration hole; 16. Rotating bearing; 17. Transmission connecting shaft; 18. Large bevel gear; 19. Mounting hole; 20. Grain discharge auger; 21. Sleeve hole; 22. Limiting groove; 23. Mounting bolt; 24. Limiting hole. DETAILED DESCRIPTION

[0021] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.

[0022] like Figure 1-Figure 3 As shown, a pulley safety structure includes a transmission case 1, a rotating hole 2 is provided on one side of the transmission case 1, a bearing is fixed inside the rotating hole 2, a transmission shaft 3 is rotatably inserted inside the rotating hole 2, the transmission shaft 3 is fixedly inserted with the inner ring of the bearing, a pulley body 4 is detachably provided on the transmission shaft 3, a storage groove 5 is provided on the surface of the pulley body 4, a grain unloading belt 6 is provided inside the storage groove 5, a sleeve hole 21 is provided on one side of the pulley body 4, two limiting holes 24 are provided inside the sleeve hole 21, a mounting bolt 23 is rotatably inserted on the transmission shaft 3, one end of the mounting bolt 23 passes through the transmission shaft 3 and is rotatably inserted with the limiting hole 24, and one end of the mounting bolt 23 passes through the limiting hole 24 and is threadedly connected with a nut.

[0023] During use, when there is a blockage in grain unloading, the unloaded grain may cause the equipment to get stuck, making it impossible for the grain unloading belt 6 to drive the transmission shaft 3 to rotate through the pulley body 4. When the rotational force reaches the strength limit of the connecting bolt 10, the mounting bolt 23 will break, causing the pulley body 4 and the transmission shaft 3 to separate. The grain unloading belt 6 drives the pulley to idle, causing the pulley body 4 to rotate without load, greatly reducing the friction between the grain unloading belt 6 and the pulley body 4, which can effectively prevent the grain unloading belt 6 from burning out due to excessive friction, thereby extending the service life of the grain unloading belt 6.

[0024] like Figure 1 , Figure 3 and Figure 4 As shown, a pulley weld 9 is fixedly inserted on the transmission shaft 3, a connecting bolt 10 is slidably inserted on the pulley weld 9, a plurality of connecting holes 7 are opened on one side of the pulley body 4, one end of the connecting bolt 10 passes through the connecting hole 7 and is threadedly connected with a nut, a hub 8 is provided on one side of the pulley body 4, a limiting groove 22 is provided inside the sleeve hole 21, a limiting strip is fixed on the surface of the transmission shaft 3, and the limiting groove 22 and the limiting strip are slidably arranged.

[0025] During use, when the pulley body 4 is installed on the transmission shaft 3, the staff will first install the pulley body 4 on the transmission shaft 3 and fit it with the pulley weld 9. During this process, the limit bar will be driven to slide into the limit groove 22, which can preliminarily fix the position of the pulley body 4 on the transmission shaft 3. Then the staff will pass the connecting bolt 10 through the pulley weld 9 and the connecting hole 7, thereby increasing the firmness of the position of the pulley body 4.

[0026] like Figure 1 As shown, a stabilizing groove 11 is provided on the inner bottom surface of the transmission housing 1, a stabilizing bearing 12 is fixed inside the stabilizing groove 11, the inner ring of the stabilizing bearing 12 is fixedly inserted with the transmission shaft 3, a small bevel gear 13 is fixedly inserted on the transmission shaft 3, a partition 14 is fixed inside the transmission housing 1, a through hole 15 is provided on one side of the partition 14, a rotating bearing 16 is fixed inside the through hole 15, a transmission connecting shaft 17 is fixed to the inner ring of the rotating bearing 16, a large bevel gear 18 is fixed at one end of the transmission connecting shaft 17, the small bevel gear 13 and the large bevel gear 18 are meshed with each other, a mounting hole 19 is provided on one side of the transmission housing 1, a grain discharge auger 20 is fixed at one end of the transmission connecting shaft 17, and the mounting hole 19 and one end of the grain discharge auger 20 are rotatably inserted.

[0027] During use, the rotating transmission shaft 3 will drive the small bevel gear 13 to rotate synchronously, and the rotating small bevel gear 13 will drive the large bevel gear 18 to rotate synchronously by utilizing the engagement with the large bevel gear 18, so that the rotational force of the rotating pulley body 4 can be transmitted to the grain discharge auger 20, and the rotation speed of the grain discharge auger 20 can be slowed down by increasing the torque, so as to avoid the grain discharge auger 20 rotating too fast and causing grain to splash everywhere, thereby preventing waste.

[0028] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A pulley safety structure, comprising a transmission housing (1), characterized in that: A rotating hole (2) is provided on one side of the transmission case (1), a bearing is fixed inside the rotating hole (2), a transmission shaft (3) is rotatably inserted inside the rotating hole (2), the transmission shaft (3) is fixedly inserted with the inner ring of the bearing, a pulley body (4) is detachably provided on the transmission shaft (3), a storage groove (5) is provided on the surface of the pulley body (4), a grain unloading belt (6) is provided inside the storage groove (5), a sleeve hole (21) is provided on one side of the pulley body (4), two limiting holes (24) are provided inside the sleeve hole (21), a mounting bolt (23) is rotatably inserted on the transmission shaft (3), one end of the mounting bolt (23) passes through the transmission shaft (3) and is rotatably inserted with the limiting hole (24), and one end of the mounting bolt (23) passes through the limiting hole (24) and is threadedly connected with a nut.

2. A pulley safety structure according to claim 1, characterized in that: A pulley weld (9) is fixedly inserted on the transmission shaft (3), a connecting bolt (10) is slidably inserted on the pulley weld (9), a plurality of connecting holes (7) are opened on one side of the pulley body (4), one end of the connecting bolt (10) passes through the connecting hole (7) and is threadedly connected to a nut, and a hub (8) is provided on one side of the pulley body (4).

3. A pulley safety structure according to claim 1, characterized in that: The inner bottom surface of the transmission housing (1) is provided with a stabilizing groove (11), a stabilizing bearing (12) is fixed inside the stabilizing groove (11), an inner ring of the stabilizing bearing (12) is fixedly inserted with the transmission shaft (3), and a small bevel gear (13) is fixedly inserted with the transmission shaft (3).

4. A pulley safety structure according to claim 3, characterized in that: A partition (14) is fixed inside the transmission housing (1), a through hole (15) is opened on one side of the partition (14), a rotating bearing (16) is fixed inside the through hole (15), a transmission connecting shaft (17) is fixed to the inner ring of the rotating bearing (16), a large bevel gear (18) is fixed to one end of the transmission connecting shaft (17), and the small bevel gear (13) and the large bevel gear (18) are meshed with each other.

5. A pulley safety structure according to claim 4, characterized in that: A mounting hole (19) is provided on one side of the transmission housing (1); a grain-discharging auger (20) is fixed to one end of the transmission connecting shaft (17); and the mounting hole (19) is rotatably inserted into one end of the grain-discharging auger (20).

6. A pulley safety structure according to claim 1, characterized in that: A limiting groove (22) is provided inside the sleeve hole (21), a limiting strip is fixed on the surface of the transmission shaft (3), and the limiting groove (22) and the limiting strip are slidably arranged.

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