Roller structure

Abstract

The utility model discloses a roller structure which comprises a roller body and a supporting assembly, and a left-right through cavity is formed in the roller body. The supporting assembly comprises two sets of supporting parts located at the two ends of the cavity correspondingly. Each set of supporting part comprises a roller shaft and at least two supporting bearings. One end of the roller shaft is located in the cavity, and the other end of the roller shaft extends out of the cavity. At least two supporting bearings are arranged on the roller shaft located in the cavity in a sleeving mode at intervals, and a gap is reserved between the roller shafts of the two sets of supporting parts. According to the roller structure, the roller body is stably supported, and meanwhile the installation and maintenance difficulty is lowered.

Description

Technical Field

[0001] The utility model relates to the technical field of logistics transportation, in particular to a roller structure. Background Art

[0002] Telescopic conveyors are generally used in logistics centers, corporate warehousing, express delivery, airports and other occasions. Telescopic conveyors are ordinary conveyors with telescopic mechanisms added to them, so that the conveyor can freely expand and contract in the length direction. Rollers, as an indispensable transmission structure for telescopic conveyors, usually include roller shafts, bearings, and cylinders. The bearings are arranged at both ends of the roller shafts, and the cylinders are mounted on them. With the increasing demand for the width of telescopic conveyors in the industry, the length of the rollers is also increasing, which leads to an increase in the weight of the rollers and increases the difficulty of installation and maintenance. In addition, due to the increase in the length of the rollers, it is difficult to provide stable support for the cylinders by relying solely on the bearings at both ends, which in turn affects the overall load-bearing capacity and transmission accuracy of the rollers. Utility Model Content

[0003] In order to overcome the above-mentioned shortcomings, the purpose of the utility model is to provide a roller structure, which reduces the difficulty of installation and maintenance while ensuring stable support for the roller body.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is: a roller structure, including a cylinder body, in which a cavity is provided which passes through left and right;

[0005] The support assembly includes two groups of support parts respectively located at the two ends of the cavity, each group of the support parts includes a roller shaft and at least two support bearings; the roller shaft is coaxially arranged with the cylinder, one end of which is located in the cavity and the other end extends out of the cavity; at least two of the support bearings are spaced and sleeved on the roller shaft located in the cavity, and a gap is left between the roller shafts of the two groups of the support parts.

[0006] When in use, the rollers of the two supporting parts (one end located outside the cavity) are fixedly mounted on other mechanisms (such as a frame). When the cylinder rotates under the action of external force, the cylinder can maintain stable rotation due to the support of the two supporting parts.

[0007] The beneficial effects of the roller structure of the utility model are:

[0008] The arrangement of two groups of support parts ensures stable support for the cylinder; the coaxial arrangement of the rollers of the two groups of support parts and the cylinder ensures that the two rollers are on the same axis, thereby ensuring the stability of the rotation axis of the cylinder; and at least two support bearings are arranged at intervals on each roller, and at least four support bearings are arranged at intervals on the two rollers. Compared with the prior art in which support bearings are only arranged at the ends, the present application can enhance the supporting effect of the cylinder in the length direction of the cylinder by arranging multiple support bearings, thereby improving the rotation stability of the cylinder; and through the gap left between the two groups of support parts, compared with the roller that runs through the entire cavity in the prior art, the overall mass of the roller can be reduced to a certain extent, thereby reducing the difficulty of installation and maintenance.

[0009] Furthermore, the cavity includes a middle cavity and end cavities located at both ends of the middle cavity, and the end cavities are used to accommodate the support part; the inner diameter of the middle cavity is smaller than the inner diameter of the end cavity, so that a limiting step for the support part to abut can be formed at the junction of the middle cavity and the end cavity. The setting of the limiting step can limit the installation position of the support part, avoiding relative movement of the support part and the cylinder in the axial direction.

[0010] Furthermore, the roller shaft comprises a coaxially arranged and integrally formed middle shaft rod and end shaft rod, two end shaft rods are provided and are respectively located at the two ends of the middle shaft rod; the outer diameter of the middle shaft rod is larger than the outer diameter of the end shaft rod. By limiting the radial dimensions of the end shaft rod and the middle shaft rod, the roller shaft can be self-positioned with respect to the support bearing, ensuring the consistency of the assembly position of the support bearing.

[0011] Furthermore, two support bearings are provided and are mounted one by one on the end section shaft rod. The inner diameter of the support bearing is matched with the outer diameter of the end section shaft rod, and the outer diameter of the support bearing is matched with the inner diameter of the end cavity to achieve support for the cylinder.

[0012] Furthermore, a positioning spring that can abut against the support bearing is mounted on the end section of the shaft away from the middle cavity. Furthermore, a positioning ring groove for the positioning spring to be embedded is provided on the inner wall of the end cavity away from the middle cavity. The support part can be positioned by the positioning spring and the positioning ring groove to prevent the support part from slipping out of the end cavity.

[0013] During assembly, firstly, the two support bearings are correspondingly mounted on the two end shafts of the roller shaft, and the two support bearings are abutted against the two ends of the middle shaft; then the roller shaft with the support bearings mounted thereon is inserted into the cavity until one of the support bearings abuts against the limiting step, and then the positioning spring is mounted from the end of the roller shaft outside the cavity onto the end shaft until the positioning spring is embedded in the positioning ring groove, at which point the positioning spring abuts against the other support bearing. During the assembly process, one support bearing is limited between the limiting step and the middle shaft, and the other support bearing is limited between the middle shaft and the positioning spring.

[0014] Furthermore, a truncated cone-shaped guide boss is provided at the end of the end section shaft rod facing the middle cavity, so as to facilitate the bearing to be sleeved onto the end section shaft rod.

[0015] Furthermore, a flat notch is provided at the end of the end section shaft rod away from the middle cavity, so as to facilitate the limited installation of the roller shaft and prevent the roller shaft from rotating with the rotation of the cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of the roller structure of an embodiment of the utility model;

[0017] Figure 2 This is a schematic cross-sectional view of the roller structure of an embodiment of the utility model;

[0018] Figure 3 for Figure 2 A partial enlarged view of the middle A area;

[0019] Figure 4 It is a schematic cross-sectional view of a cylinder according to an embodiment of the utility model;

[0020] Figure 5 It is a schematic structural diagram of the roller shaft of an embodiment of the utility model.

[0021] In the figure:

[0022] 1- cylinder; 11- middle cavity; 12- end cavity; 121- positioning ring groove; 13- limiting step;

[0023] 2-support part; 21-roller shaft; 211-middle shaft rod; 212-end shaft rod; 2121-guide boss; 2122-flat notch; 22-support bearing; 23-positioning retaining spring. DETAILED DESCRIPTION

[0024] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0025] Example

[0026] See attached Figure 1-3 As shown, a roller structure of the utility model comprises a cylinder 1 and a support assembly, wherein a cavity is provided in the cylinder 1 and is passed through from left to right. The support assembly comprises two groups of support parts 2 respectively located at two ends of the cavity, and each group of support parts 2 comprises a roller shaft 21 and at least two support bearings 22. The roller shaft 21 is coaxially arranged with the cylinder 1, one end of which is located in the cavity and the other end extends out of the cavity. At least two support bearings 22 are spaced apart and sleeved on the roller shaft 21 located in the cavity, and a gap is left between the roller shafts 21 of the two groups of support parts 2.

[0027] When in use, the rollers 21 (one end outside the cavity) of the two support parts 2 are fixedly mounted on other mechanisms (such as a frame), and when the cylinder 1 rotates under the action of an external force, the cylinder 1 can maintain stable rotation due to the support of the two support parts 2 on the cylinder 1. By arranging two support parts 2 at both ends of the cylinder 1, while maintaining stable support for the cylinder 1, the size of the support part 2 can be kept unchanged by the change of the length of the cylinder 1, thereby preventing the problem of increased difficulty in installation and maintenance due to the increased mass of the support part 2.

[0028] In this embodiment, the coaxial arrangement of the roller shafts 21 of the two groups of support parts 2 and the cylinder 1 ensures that the two roller shafts 21 are on the same axis, thereby ensuring the stability of the rotation axis of the cylinder 1; and at least two support bearings 22 are arranged at intervals on each roller shaft 21, and at least four support bearings 22 are arranged at intervals on the two roller shafts 21. Compared with the prior art in which support bearings 22 are only arranged at the ends, this embodiment can enhance the supporting effect on the cylinder 1 in the length direction of the cylinder 1 by arranging multiple support bearings 22, thereby improving the rotation stability of the cylinder 1; and through the gap left between the two groups of support parts 2, compared with the roller shaft that runs through the entire cavity in the prior art, the overall mass of the roller can be reduced to a certain extent.

[0029] It should be noted that this embodiment takes the example of providing two support bearings 22 in each support part 2 to describe in detail the assembly structure of the support part 2 and the cylinder body 1. However, in actual application, the number of support bearings 22 can be flexibly adjusted according to needs.

[0030] In order to define the installation position of the support part 2, in some embodiments, see the attached Figure 3-4As shown, the cavity includes a middle cavity 11 and end cavities 12 located at both ends of the middle cavity 11, and the end cavities 12 are used to accommodate the support part 2; the inner diameter of the middle cavity 11 is smaller than the inner diameter of the end cavity 12, so that a limiting step 13 for the support part 2 to abut can be formed at the junction of the middle cavity 11 and the end cavity 12. When the support part 2 is assembled into the corresponding end cavity 12, one end of the support part 2 facing the middle cavity 11 can abut on the limiting step 13 to inhibit the relative movement of the support part 2 and the cylinder 1 in the axial direction.

[0031] In the support part 2, in order to define the installation position of the support bearing 22 on the roller shaft 21. In some embodiments, see the attached Figure 5 As shown, the roller shaft 21 includes a coaxially arranged and integrally formed middle section shaft rod 211 and an end section shaft rod 212, and two end section shaft rods 212 are provided and are respectively located at the two ends of the middle section shaft rod 211. The outer diameter of the middle section shaft rod 211 is larger than the outer diameter of the end section shaft rod 212. Correspondingly, two support bearings 22 are provided and are mounted one by one on the end section shaft rod 212, and the inner diameter of the support bearing 22 is adapted to the outer diameter of the end section shaft rod 212, and the outer diameter of the support bearing 22 is adapted to the inner diameter of the end cavity 12, so as to achieve support for the cylinder body 1. By limiting the radial dimensions of the end section shaft rod 212 and the middle section shaft rod 211, the roller shaft 21 can achieve self-positioning of the support bearing 22, and ensure the consistency of the assembly position of the support bearing 22.

[0032] In some embodiments, see Appendix Figure 3 As shown, a positioning spring 23 that can abut against the support bearing 22 is mounted on the end section shaft rod 212 away from the middle cavity 11. Furthermore, a positioning ring groove 121 for the positioning spring 23 to be embedded is provided on the inner wall of the end cavity 12 away from the middle cavity 11. The support part 2 can be positioned by the arrangement of the positioning spring 23 and the positioning ring groove 121 to prevent the support part 2 from slipping out of the end cavity 12.

[0033] During assembly, firstly, the two support bearings 22 are correspondingly mounted on the two end shafts 212 of the roller shaft 21, and the two support bearings 22 are abutted against the two ends of the middle shaft 211; then, the roller shaft 21 with the support bearings 22 mounted thereon is inserted into the cavity until one of the support bearings 22 abuts against the limiting step 13, and then, the positioning spring 23 is mounted from the end of the roller shaft 21 outside the cavity onto the end shaft 212 thereof until the positioning spring 23 is embedded in the positioning ring groove 121, at which time, the positioning spring 121 abuts against the other support bearing 22. During the assembly process, one support bearing 22 is limited between the limiting step 13 and the middle shaft 211, and the other support bearing 22 is limited between the middle shaft 211 and the positioning spring 23.

[0034] For further information, see Appendix Figure 5As shown, the end of the end section shaft rod 212 facing the middle cavity 11 is provided with a truncated cone-shaped guide boss 2121, and the end of the other end section shaft rod 212 is provided with a flat notch 2122. The provision of the guide boss 2121 facilitates the support bearing 22 to be mounted on the end section shaft rod 212, and the provision of the flat notch 2122 facilitates the limited installation of the roller shaft 21 and other mechanisms, so as to prevent the roller shaft 21 from rotating with the rotation of the cylinder body 1.

[0035] The above implementation modes are only for illustrating the technical concept and features of the utility model, and their purpose is to allow people familiar with this technology to understand the content of the utility model and implement it. It cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A roller structure, characterized in that: include A cylinder body, in which a cavity is provided which passes through from left to right; The support assembly includes two groups of support parts respectively located at the two ends of the cavity, each group of the support parts includes a roller shaft and at least two support bearings; the roller shaft is coaxially arranged with the cylinder, one end of which is located in the cavity and the other end extends out of the cavity; at least two of the support bearings are spaced and sleeved on the roller shaft located in the cavity, and a gap is left between the roller shafts of the two groups of the support parts.

2. The roller structure according to claim 1, characterized in that: The cavity includes a middle cavity and end cavities located at both ends of the middle cavity, and the end cavities are used to accommodate the support part; the inner diameter of the middle cavity is smaller than the inner diameter of the end cavity, so that a limiting step for the support part to abut can be formed at the junction of the middle cavity and the end cavity.

3. The roller structure according to claim 2, characterized in that: The roller shaft comprises a middle section shaft rod and an end section shaft rod which are coaxially arranged and integrally formed. Two end section shaft rods are provided and are respectively located at two ends of the middle section shaft rod; the outer diameter of the middle section shaft rod is greater than the outer diameter of the end section shaft rod.

4. The roller structure according to claim 3, characterized in that: The support bearings are provided with two and are mounted one by one on the end section shaft rod. The inner diameter of the support bearings matches the outer diameter of the end section shaft rod, and the outer diameter of the support bearings matches the inner diameter of the end cavity.

5. The roller structure according to claim 4, characterized in that: The end section of the shaft rod away from the middle cavity is sleeved with a positioning spring that can abut against the support bearing.

6. The roller structure according to claim 5, characterized in that: A positioning ring groove for embedding the positioning clamping ring is formed on the inner wall of one end of the end cavity away from the middle cavity.

7. The roller structure according to claim 4, characterized in that: A truncated cone-shaped guide boss is provided at the end of the end section shaft rod facing the middle cavity.

8. The roller structure according to claim 3, characterized in that: The end of the end section shaft rod away from the middle cavity is provided with a flat notch.

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