Shaft

Abstract

The utility model discloses a shaft which comprises a pull rod, a pressing block, a shaft shell and a nut. The pull rod is mounted in the shaft shell; the nut is connected with the head part of the pressing block through welding; the two pressing blocks are installed at the two ends of the pull rod. The two pressing blocks are pressed into the shaft shell from the tails of the pressing blocks through respective nuts; the pressing block is in a circular truncated cone shape. According to the technical content disclosed by the utility model, when a clearance occurs in hole-shaft matching due to shaft abrasion or hole abrasion, the diameter of a hole can be automatically corrected and compensated, the frequency of replacing parts is reduced, and the maintenance cost is reduced. The shaft has the advantages of being simple in structure, convenient to use and the like, when the shaft is used, the diameter of the shaft can be increased only by pressing the pressing block into the shaft shell through the nut, and the compensation process can be completed without disassembling the shaft. The shaft can adapt to holes of different sizes, meanwhile, stress distribution on the shaft can be optimized, the stress concentration phenomenon is avoided, the service life of the shaft is prolonged, meanwhile, the replacement period of the shaft is prolonged, and the equipment cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of cigarette-making equipment, and more specifically, to a shaft. Background Art

[0002] In tobacco leaf conditioning equipment, hole-shaft fit is mainly used to ensure the accuracy and stability between rotating parts and fixed parts in the equipment. These equipment usually include cigarette cutters, dryers, re-dampers, conveyor belts, etc. Hole-shaft fit plays a crucial role in tobacco leaf conditioning equipment. It can ensure that key components of the equipment can work precisely and stably together, thereby improving the production efficiency and quality of tobacco leaf conditioning. During the operation of the equipment, due to vibration and other reasons, the holes or shafts are worn. After the shaft is worn, it is relatively convenient to replace. After the hole is worn, generally the entire rack needs to be replaced, resulting in high costs and maintenance difficulties.

[0003] Therefore, how to provide a shaft has become a technical problem urgently to be solved in this field. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a shaft.

[0005] The shaft of the utility model includes a pull rod, a pressing block, a shaft housing and a nut;

[0006] The pull rod is installed in the shaft housing; the nut is connected to the head of the pressing block by welding; the two pressing blocks are installed at both ends of the pull rod; the two pressing blocks are pressed into the shaft housing from the tail of the pressing block through their respective nuts; the pressing block is frustum-shaped.

[0007] Optionally, the pull rod includes a pull rod shaft and an external thread;

[0008] The external thread is provided at both ends of the pull rod shaft.

[0009] Optionally, the whole pressing block is frustum-shaped, and a first through hole is opened along the generatrix direction, and the diameter of the first through hole is equal to the diameter of the pull rod.

[0010] Optionally, an adjustment groove is opened on the outer surface of the pressing block.

[0011] Optionally, the shaft body of the shaft housing is of a cylindrical structure, and a second through hole is opened along the axial direction, and the diameter of the second through hole is equal to the diameter of the pull rod.

[0012] Optionally, circular grooves are respectively opened at both ends of the expansion housing of the shaft housing, and the diameter of the circular groove is equal to the bottom circle diameter of the tail of the pressing block.

[0013] Optionally, four rectangular grooves are opened around the circular groove.

[0014] According to the technical content disclosed by the present utility model, the following beneficial effects are achieved: when the shaft wears or the hole wears, resulting in a gap in the hole-shaft fit, it can automatically correct and compensate the diameter of the hole, reducing the frequency of replacing parts and lowering the maintenance cost. This shaft has the characteristics of simple structure and convenient use. When in use, only a nut is needed to press the pressing block into the inner part of the shaft housing, and the diameter of the shaft can be increased without removing the shaft, thus completing the compensation process. This shaft can adapt to holes of different sizes, and at the same time, it can optimize the stress distribution on the shaft, avoid stress concentration, improve the service life of the shaft, extend the replacement cycle of the shaft, and reduce the equipment cost.

[0015] Other features and advantages of the present utility model will become clear through the following detailed description of the exemplary embodiments of the present utility model with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings incorporated in and forming a part of this specification illustrate embodiments of the present utility model and, together with the description, are used to explain the principles of the present utility model.

[0017] Figure 1 Schematic diagram of a shaft provided according to an embodiment;

[0018] Figure 2 Schematic diagram of the structure of the pressing block provided according to an embodiment;

[0019] Figure 3 Schematic diagram of the structure of the shaft housing provided according to an embodiment;

[0020] Figure 4 Schematic diagram of the structure of the pull rod provided according to an embodiment;

[0021] Figure 5 Schematic diagram of the usage method provided according to an embodiment.

[0022] Description of the reference numerals: 1-1 - pull rod, 1-2 - pressing block, 1-3 - shaft housing, 1-4 - nut, 2-1 - tail of the pressing block, 2-2 - head of the pressing block, 2-3 - adjustment groove, 3-1 - expansion housing, 3-2 - shaft body, 3-3 - rectangular groove, 3-4 - circular groove, 3-5 - through hole, 4-1 - pull rod shaft, 4-2 - external thread, 5-1 - frame, 5-2 - hole, 5-3 - shaft. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] Now, various exemplary embodiments of the present utility model will be described in detail with reference to the accompanying drawings. It should be noted that: unless otherwise specifically stated, the relative arrangements of the components and steps set forth in these embodiments, numerical expressions, and numerical values do not limit the scope of the present utility model.

[0024] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way a limitation on the present utility model, its application, or use.

[0025] Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such technologies, methods, and devices should be regarded as part of the specification.

[0026] In all examples shown and discussed herein, any specific values should be construed as merely exemplary and not as a limitation. Thus, other examples of the exemplary embodiments may have different values.

[0027] It should be noted that like reference numerals and letters denote like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

[0028] As Figures 1 to 4 shown, a shaft is provided, including a pull rod 1-1, a pressing block 1-2, a shaft housing 1-3, and a nut 1-4;

[0029] The pull rod 1-1 is installed inside the shaft housing 1-3; the pull rod 1-1 includes a pull rod shaft 4-1 and an external thread 4-2; the external thread 4-2 is provided at both ends of the pull rod shaft 4-1; the nut 1-4 is connected to the pressing block head 2-2 by welding to provide power for pressing the pressing block 1-2 into the shaft housing 1-3; two pressing blocks 1-2 are installed at both ends of the pull rod 1-1 and cooperate with the external threads 4-2 at both ends of the pull rod 1-1; the two pressing blocks 1-2 are pressed into the shaft housing 1-3 from the pressing block tail 2-1 through their respective nuts 1-4; the pressing block 1-2 is frustum-shaped.

[0030] In some embodiments, the pressing block 1-2 is integrally frustum-shaped and has a first through hole opened along the generatrix direction, and the diameter of the first through hole is equal to the diameter of the pull rod 1-1.

[0031] The outer surface of the pressing block 1-2 is provided with an adjustment groove 2-3, which plays a fixing role during adjustment.

[0032] The shaft body 3-2 of the shaft housing 1-3 is a cylindrical structure and has a second through hole 3-5 opened along the axial direction, and the diameter of the second through hole 3-5 is equal to the diameter of the pull rod 1-1.

[0033] Circular grooves 3-4 are respectively opened at both ends of the expansion housing 3-1 of the shaft housing 1-3, and the diameter of the circular grooves 3-4 is equal to the bottom circle diameter of the pressing block tail 2-1.

[0034] Four rectangular grooves 3-3 are opened around the circular groove 3-4. When the head 2-2 of the pressing block is pressed into the circular groove 3-4 of the shaft housing, the inner surfaces at both ends of the shaft housing 1-3 are stressed, and the expandable outer shell 3-1 expands outwards, increasing the outer diameter of the shaft housing 1-3, which has a compensating effect. At this time, the diameter of the shaft body 3-2 remains unchanged.

[0035] Specific usage method:

[0036] As Figure 5 shown, when the hole 5-3 on the frame 5-1 is worn and the shaft fit fails, the mechanical performance can be restored through the compensating effect of the shaft 5-2 with self-compensating function. When in use, if it is necessary to increase the diameter of one end of the shaft housing 1-3, the adjustment groove 2-3 of the pressing block 1-2 at the other end can be fixed with a tool, and then the nut 1-4 on the side where the diameter needs to be increased can be tightened to achieve the function.

[0037] In summary, for the technical content disclosed in the present utility model, when the shaft is worn or the hole is worn, resulting in a gap in the hole-shaft fit, it can automatically correct and compensate the diameter of the hole, reduce the frequency of replacing parts, and lower the maintenance cost. This shaft has the characteristics of simple structure and convenient use. When in use, only need to press the pressing block into the shaft housing with a nut to increase the diameter of the shaft, and the compensation process can be completed without removing the shaft. This shaft can adapt to holes of different sizes, and at the same time can optimize the stress distribution on the shaft, avoid stress concentration phenomenon, improve the service life of the shaft, extend the replacement cycle of the shaft, and reduce the equipment cost.

[0038] Although some specific embodiments of the present utility model have been described in detail through examples, those skilled in the art should understand that the above examples are only for illustration and not for limiting the scope of the present utility model. Those skilled in the art should understand that the above embodiments can be modified without departing from the scope and spirit of the present utility model. The scope of the present utility model is defined by the appended claims.

Claims

1. A shaft, characterized in that: include: Tie rods, pressure blocks, axle housings and nuts; The pull rod is installed in the shaft housing; the nut is connected to the head of the pressure block by welding; two pressure blocks are installed at both ends of the pull rod; the two pressure blocks are pressed into the shaft housing from the tail of the pressure block through their respective nuts; the pressure block is truncated cone-shaped.

2. The shaft according to claim 1, characterized in that The pull rod comprises: a pull rod shaft and an external thread; The external threads are arranged at two ends of the pull rod shaft.

3. The shaft according to claim 2, characterized in that The pressing block is in a truncated cone shape as a whole, and has a first through hole opened along the generatrix direction, wherein the diameter of the first through hole is equal to the diameter of the pull rod.

4. The shaft according to claim 3, characterized in that The outer surface of the pressing block is provided with an adjusting groove.

5. The shaft according to claim 4, characterized in that The shaft body of the shaft housing is a cylindrical structure, and a second through hole is opened along the axial direction. The diameter of the second through hole is equal to the diameter of the pull rod.

6. The shaft according to claim 5, characterized in that Circular grooves are respectively formed at two ends of the expansion shell of the shaft shell, and the diameter of the circular groove is equal to the bottom circle diameter of the tail of the pressing block.

7. The shaft according to claim 6, characterized in that Four rectangular grooves are formed around the circular groove.

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