Roller resistance adjusting mechanism

Abstract

The utility model discloses a roller resistance adjusting mechanism and belongs to the technical field of roller way conveying. The roller solves the problems that the adjusting range of an existing roller cannot meet the scheme requirement, and the existing roller is loosened after being used for a long time. Comprising a roller shaft, an eccentric hole blocking piece, a connecting screw, an adjusting assembly and a chain wheel, one end of the roller shaft is a resistance adjusting end, the adjusting assembly comprises a compressed spring and an adjusting nut, the chain wheel is movably connected to the roller shaft, and the adjusting assembly is movably connected to the roller shaft and makes contact with the side, close to the resistance adjusting end, of the chain wheel. The eccentric hole blocking piece is movably connected to the end portion of the resistance adjusting end, and the adjusting assembly and the eccentric hole blocking piece are connected through a connecting screw. According to the roller resistance adjusting device, the adjusting range of the roller resistance is increased through cooperation of the adjusting nuts and the pressure springs, and the requirement for roller resistance adjustment in the scheme can be met; through clamping connection of the eccentric hole blocking piece, the connecting screw and the adjusting nut, the adjusting nut is fixed to the preset position for a long time, and the phenomena of loosening and moving do not occur.

Description

Technical Field

[0001] The utility model relates to a roller resistance regulating mechanism, belonging to the technical field of roller conveying. Background Art

[0002] Roller conveyors are a widely used conveying method, capable of conveying materials horizontally, obliquely, and vertically, forming part of a multi-point continuous conveying system or operating independently. They are suitable for conveying a wide range of bulk and bagged materials. Their advantages include high throughput, high efficiency, long conveying distances, flexible directional control, low noise pollution, high reliability, long service life, forward and reverse conveying capabilities, and easy maintenance. Furthermore, roller conveyors offer a simple structure, stable operation, wide adaptability, ease of maintenance, affordability, and high customizability.

[0003] At present, the automated conveying system for engine cylinder blocks or cylinder heads also mostly adopts the conveyor roller transportation method. Since the weight of the workpieces conveyed by the rollers is different and the working procedures are different, it is necessary to adjust the roller resistance of the conveyor roller according to the workpieces of different weights, or before the working procedure that requires the workpiece to stop, the roller resistance adjustment mechanism is used to stop the roller and control the workpiece to stop. However, the adjustment range of the existing rollers cannot meet the requirements of the solution, and the roller cannot stop when the workpiece stops, thereby scratching the workpiece. At the same time, there is also the phenomenon that the resistance adjustment mechanism becomes loose during long-term use, resulting in unstable resistance adjustment. Utility Model Content

[0004] The utility model is to solve the above problems and further provides a roller resistance adjustment mechanism.

[0005] The technical solution adopted by the present invention to solve the above technical problems is:

[0006] A roller resistance adjustment mechanism includes a roller shaft, an eccentric hole baffle, a connecting screw, an adjusting assembly and a sprocket. One end of the roller shaft is a resistance adjustment end. The adjusting assembly includes a compression spring and an adjusting nut. The compression spring is sleeved on the roller shaft. The adjusting nut is threadedly connected to the roller shaft and contacts the end of the compression spring close to the resistance adjustment end. The sprocket is movably connected to the roller shaft. Different transmission ratios of the sprocket and the roller shaft are obtained by adjusting the nut to different degrees of compression of the compression spring, thereby realizing the resistance adjustment of the mechanism. The eccentric hole baffle is fixedly connected to the end of the resistance adjustment end. The adjusting assembly and the eccentric hole baffle are connected by a connecting screw to reduce the displacement of the adjusting assembly relative to the roller shaft.

[0007] Furthermore, a radial groove is opened at the center position of the resistance adjustment end of the roller shaft, and a boss is provided radially on one side of the eccentric hole baffle, and the positioning of the eccentric hole baffle and the roller shaft is achieved through the cooperation of the boss and the groove.

[0008] Furthermore, a threaded hole is opened axially at the center of the resistance adjustment end, a through hole is opened at the center of the eccentric hole blocking piece, and the eccentric hole blocking piece is connected to the roller shaft through a flat head screw.

[0009] Furthermore, the adjusting nut has a plurality of key slots along the circumferential direction, an eccentric threaded hole is formed at a relative position between the eccentric hole blocking piece and any key slot of the adjusting nut, and the connecting screw passes through the eccentric threaded hole and is clamped in any key slot of the adjusting nut.

[0010] Furthermore, wear-resistant rings are mounted on the roller shafts on both sides of the sprocket.

[0011] Furthermore, a limiting through hole is radially opened on the roller shaft on the side of the sprocket near the resistance adjustment end, a positioning pin is fixedly connected in the limiting through hole, and a groove with a depth greater than the diameter of the positioning pin is opened on the side of the wear-resistant ring near the resistance adjustment end near the sprocket, and the wear-resistant ring is connected to the roller shaft through the cooperation of the positioning pin and the groove.

[0012] Furthermore, the roller shaft is a stepped shaft, the resistance adjustment end is located in the small shaft diameter section, and the wear-resistant ring away from the resistance adjustment end is clamped at the shoulder position of the stepped shaft.

[0013] Furthermore, the sprocket is movably connected to the roller shaft through an oil-free bearing.

[0014] Furthermore, a retaining ring is mounted on the roller shaft section between the compression spring and the adjusting nut.

[0015] Compared with the prior art, the present invention has the following effects:

[0016] The adjustment component of the utility model greatly increases the adjustment range of the roller resistance, which can meet the requirements of the scheme for adjusting the roller resistance;

[0017] By the fixed connection between the eccentric hole baffle and the roller shaft of the utility model, and the connection between the adjusting nut and the eccentric hole baffle by the connecting screw, the adjusting nut and the roller shaft do not move relative to each other, so that the adjusting nut can be fixed in the preset position for a long time, which can greatly reduce the occurrence of loosening and movement.

[0018] By adjusting the degree of compression of the compression spring by the nut to obtain different transmission ratios between the sprocket and the roller, the adjustment range of the roller rotation speed from stopping to synchronous rotation with the sprocket can be achieved. At the same time, through different transmission ratios, the ability to make multiple rollers have adjustable resistance can be achieved through one power source, which can reduce the setting of the power source and thus save the company's operating costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings, which constitute part of the present invention, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0020] Figure 1 It is a first three-dimensional structural schematic diagram of the roller resistance adjustment mechanism;

[0021] Figure 2 is a second three-dimensional structural schematic diagram of the roller resistance adjustment mechanism;

[0022] Figure 3 It is a cross-sectional view of the roller resistance adjustment mechanism;

[0023] Figure 4 It is a schematic diagram of the three-dimensional structure of the eccentric hole baffle of the roller resistance adjustment mechanism;

[0024] In the figure, 1 is the roller shaft; 2 is the compression spring; 3 is the adjusting nut; 4 is the eccentric hole baffle; 5 is the connecting screw; 6 is the retaining ring; 7 is the flat head screw; 8 is the sprocket; 9 is the wear-resistant ring; 10 is the boss; 11 is the through groove. DETAILED DESCRIPTION

[0025] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely explain the technical solutions in the embodiments of the present invention. It should be noted that the embodiments and features in the embodiments of the present invention can be combined with each other in the absence of conflict, and the embodiments described are only part of the embodiments of the present invention, not all of the embodiments.

[0026] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0027] Refer to the drawings in the specification for an explanation of this embodiment, a roller resistance adjustment mechanism, including a roller shaft, an eccentric hole baffle, a connecting screw, an adjusting assembly and a sprocket, one end of the roller shaft is a resistance adjustment end, the adjusting assembly includes a compression spring and an adjusting nut, the compression spring is sleeved on the roller shaft, the adjusting nut is threadedly connected to the roller shaft and contacts with the end of the compression spring close to the resistance adjustment end, the sprocket is movably connected to the roller shaft, and different transmission ratios of the sprocket and the roller shaft are obtained by adjusting the nut to different degrees of compression of the compression spring, thereby realizing the resistance adjustment of the mechanism, the eccentric hole baffle is fixedly connected to the end of the resistance adjustment end, and the adjusting assembly and the eccentric hole baffle are connected by connecting screws to reduce the displacement of the adjusting assembly relative to the roller shaft, thereby realizing the anti-loosening function of the mechanism. Specifically, when the adjusting nut does not compress the compression spring, the wear-resistant ring does not contact the sprocket, and the rotation of the sprocket will not be transmitted to the roller shaft; when the adjusting nut compresses the compression spring to a fully compressed state, the wear-resistant ring is in full contact with the sprocket, and the rotation speed of the sprocket and the roller shaft is the same; when the compression spring is in a compressed state between the uncompressed state and the fully compressed state, it is the resistance adjustment range of this mechanism.

[0028] The resistance adjustment range of the roller is increased by the adjustment component, which can meet the needs of the roller resistance adjustment in the solution; the eccentric hole baffle and the roller shaft are fixedly connected by the utility model, and the adjusting nut and the eccentric hole baffle are connected by the connecting screw, so that the adjusting nut and the roller shaft do not move relative to each other, so that the adjusting nut can be fixed in the preset position for a long time, which can greatly reduce the occurrence of loosening and movement; different transmission ratios of the sprocket and the roller shaft are obtained by adjusting the different compression degrees of the compression spring by the adjustment nut, thereby realizing the control of the rotation of multiple sprockets by one power source, and then driving the rotation of multiple roller resistance adjustment mechanisms, realizing that one power source drives multiple roller resistance adjustment mechanisms, which can reduce the setting of the power source and thus save the operating cost of the enterprise.

[0029] The resistance-adjusting end of the roller shaft 1 has a through-slot 11 along its center, and a radial boss 10 is provided on one side of the eccentric hole blocking piece 4. The boss 10 cooperates with the through-slot 11 to achieve positioning of the eccentric hole blocking piece 4 and the roller shaft 1. The cooperation between the boss 10 of the eccentric hole blocking piece 4 and the through-slot 11 at the resistance-adjusting end of the roller shaft 1 improves the accuracy of the connection between the eccentric hole blocking piece 4 and the roller shaft 1; it also reduces the relative displacement between the eccentric hole blocking piece 4 and the roller, improving the overall stability of the mechanism.

[0030] A threaded hole is formed at the center of the resistance adjustment end, and a through hole is formed at the center of the eccentric hole blocking piece 4. The eccentric hole blocking piece 4 is connected to the roller shaft 1 via a flat head screw 7. The hole in the center can reduce the influence of the centripetal force generated during rotation on the stability of the mechanism, making the connection between the eccentric hole blocking piece 4 and the roller shaft 1 more stable. Tightening the eccentric hole blocking piece 4 and the roller shaft 1 with the flat head screw 7 can improve the connection stability and further reduce the possibility of loosening of the mechanism.

[0031] The adjusting nut 3 has multiple keyways along the circumference, and the eccentric hole blocking piece 4 has an eccentric threaded hole at a position relative to any keyway of the adjusting nut 3. The connecting screw 5 passes through the eccentric threaded hole and is engaged with any keyway of the adjusting nut 3. Specifically, the width of the keyway is slightly larger than the diameter of the connecting screw 5, and the diameter of the eccentric threaded hole is the same as the major diameter of the connecting screw 5. The boss 10 of the eccentric hole blocking piece 4 and the flat head screw tighten to prevent relative movement between the eccentric hole blocking piece 4 and the roller shaft 1. The connecting screw 5 engages the keyway of the eccentric hole blocking piece 4 and the adjusting nut 3, ensuring that the adjusting nut 3 and the eccentric hole blocking piece 4 do not move relative to each other, thereby preventing relative movement between the adjusting nut 3 and the roller shaft 1, and ensuring that the mechanism has anti-loosening properties.

[0032] Wear-resistant rings 9 are mounted on the roller shaft 1 on both sides of the sprocket 8. The sprocket 8 drives the roller shaft 1 to rotate through the adjustment assembly. The wear-resistant rings 9 can reduce the wear of the roller shaft 1 and the compression spring 2 caused by the rotation of the sprocket 8. In addition, when the compression spring 2 is compressed, the wear-resistant rings 9 can adjust the connection between the sprocket 8 and the roller shaft 1.

[0033] A radially limited through-hole is formed on the roller shaft 1 on the side of the sprocket 8 near the resistance adjustment end, and a positioning pin is fixedly connected to the limited through-hole. A groove with a depth greater than the diameter of the positioning pin is formed along the axial direction of the wear-resistant ring 9 on the side near the resistance adjustment end near the sprocket. The wear-resistant ring 9 is connected to the roller shaft 1 through the cooperation of the positioning pin and the groove. The positioning pin restricts the wear-resistant ring 9 to a small axial movement, ensuring that the power transmitted from the sprocket 8 to the roller shaft through the wear-resistant ring 9 is not consumed by other means, thereby ensuring the accuracy of the resistance adjustment mechanism.

[0034] The roller shaft 1 is a stepped shaft, with the resistance adjustment end at the small shaft diameter section, and the wear ring 9 away from the resistance adjustment end is stuck at the shoulder position of the stepped shaft. The stepped shaft provides a fixed position for the wear ring 9 and also plays a positioning role for the setting of the sprocket 8.

[0035] The sprocket 8 is movably connected to the roller shaft 1 via an oil-free bearing. Specifically, the oil-free bearing and the sprocket 8 have an interference fit. When the compression spring 2 is tightened, the sprocket 8 and the roller shaft 1 do not move relative to each other, and the oil-free bearing is not in operation. When the roller shaft 1 stops, the sprocket 8 continues to rotate, and the roller shaft 1 and the sprocket 8 move relative to each other. At this time, the oil-free bearing converts the sliding friction between the roller shaft 1 and the sprocket 8 into rolling friction, thereby reducing wear on the roller shaft 1.

[0036] A retaining ring 6 is provided between the compression spring 2 and the adjusting nut 3. The provision of the retaining ring 6 can increase the contact area between the compression spring 2 and the adjusting nut 3, and at the same time, can reduce the friction between the adjusting nut 3 and the compression spring 2 when the adjusting nut 3 is rotated to adjust the resistance.

[0037] The eccentric hole blocking piece 4, adjusting nut 3, compression spring 2, and connecting screw 5 are customized according to the size of the roller shaft 1. Depending on the size and weight of the workpiece, roller shafts 1 of different lengths and diameters are required for transportation. Different sizes of roller shafts 1 also require different sizes of eccentric hole blocking pieces 4, adjusting nut 3, compression spring 2, and connecting screw 5.

[0038] The utility model provides a roller resistance adjustment mechanism, and the specific adjustment steps are as follows:

[0039] The compression spring 2, retaining ring 6, and adjusting nut 3 are connected to the resistance adjusting end of the roller in sequence, the boss 10 of the eccentric hole baffle 4 is inserted into the keyway of the end face of the resistance adjusting end, and the eccentric hole baffle 4 is connected to the roller by a flat head screw, and the connecting screw 5 passes through the eccentric threaded hole of the eccentric hole baffle 4 and is clamped in any keyway of the adjusting nut 3. When the adjusting nut 3 is adjusted to the workpiece on the roller and encounters resistance during movement, the roller corresponding to the workpiece stops rotating, and the roller that is not subject to resistance maintains a moving state, which is the optimal state for resistance adjustment of the roller resistance adjustment mechanism.

[0040] The utility model is a roller resistance adjustment mechanism, and its specific working process is described as follows:

[0041] The workpiece is placed on the roller. Specifically, the roller is mounted on the roller shaft. The sprocket 8 is rotated by the power source. The adjusting nut 3 corresponding to each roller is adjusted to adjust the resistance of the roller shaft 1 and the sprocket 8 through the wear-resistant ring so that the workpiece reaches the required forward speed. When the workpiece needs to stop in a certain process, the workpiece stops due to resistance, and the roller under the workpiece can also stop under resistance, while the roller without resistance continues to maintain the forward speed unchanged. In addition, when the roller shaft 1 stops, the roller shaft 1 and the sprocket 8 tend to produce relative motion. At this time, the sliding friction between the sprocket 8 and the roller shaft 1 is converted into rolling friction through the oil-free bearing, thereby reducing the wear of the roller shaft 1.

[0042] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and inventive concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A roller resistance adjustment mechanism, characterized in that: The invention comprises a roller shaft (1), an eccentric hole baffle (4), a connecting screw (5), an adjusting assembly and a sprocket (8), wherein one end of the roller shaft (1) is a resistance adjusting end, and the adjusting assembly comprises a compression spring (2) and an adjusting nut (3), wherein the compression spring (2) is sleeved on the roller shaft (1), and the adjusting nut (3) is threadedly connected to the roller shaft (1) and contacts with one end of the compression spring (2) close to the resistance adjusting end, and the sprocket (8) is movably connected to the roller shaft (1), and different transmission ratios of the sprocket (8) and the roller shaft (1) are obtained by adjusting the nut (3) to different degrees of compression of the compression spring (2), thereby realizing resistance adjustment of the mechanism, and the eccentric hole baffle (4) is fixedly connected to the end of the resistance adjusting end, and the adjusting assembly and the eccentric hole baffle (4) are connected by the connecting screw (5) to reduce the displacement of the adjusting assembly relative to the roller shaft (1).

2. The roller resistance adjustment mechanism according to claim 1, characterized in that: A through groove (11) is radially opened at the center of the resistance adjustment end of the roller shaft (1), and a boss (10) is radially arranged on one side of the eccentric hole blocking piece (4). The boss (10) cooperates with the through groove (11) to achieve positioning of the eccentric hole blocking piece (4) and the roller shaft (1).

3. The roller resistance adjustment mechanism according to claim 1, characterized in that: A threaded hole is formed at the center of the resistance adjustment end, a through hole is formed at the center of the eccentric hole blocking piece (4), and the eccentric hole blocking piece (4) is connected to the roller shaft (1) via a flat head screw (7).

4. The roller resistance adjustment mechanism according to claim 1, characterized in that: The adjusting nut (3) is provided with a plurality of key slots along the circumferential direction, an eccentric threaded hole is provided at a relative position between the eccentric hole blocking piece (4) and any key slot of the adjusting nut (3), and a connecting screw (5) passes through the eccentric threaded hole and is clamped in any key slot of the adjusting nut (3).

5. The roller resistance adjustment mechanism according to claim 1, characterized in that: Wear-resistant rings (9) are sleeved on the roller shafts (1) on both sides of the sprocket (8).

6. The roller resistance adjustment mechanism according to claim 5, characterized in that: A limiting through hole is radially opened on the roller shaft (1) on the side of the sprocket (8) close to the resistance adjustment end, a positioning pin is fixedly connected in the limiting through hole, and a groove with a depth greater than the diameter of the positioning pin is opened on the side of the wear-resistant ring (9) close to the resistance adjustment end on the side close to the sprocket, and the wear-resistant ring (9) is connected to the roller shaft (1) through the cooperation of the positioning pin and the groove.

7. The roller resistance adjustment mechanism according to claim 5, characterized in that: The roller shaft (1) is a stepped shaft, the resistance adjustment end is located in the small shaft diameter section, and the wear-resistant ring (9) away from the resistance adjustment end is clamped at the shoulder position of the stepped shaft.

8. The roller resistance adjustment mechanism according to claim 1, characterized in that: The sprocket (8) is movably connected to the roller shaft (1) via an oil-free bearing.

9. The roller resistance adjustment mechanism according to claim 1, characterized in that: A retaining ring (6) is provided between the compression spring (2) and the adjusting nut (3).

Images