A stainless steel trunnion

Abstract

This utility model relates to the field of trunnion technology, specifically a stainless steel trunnion. The utility model includes an outer shaft with a connecting cavity inside. Both ends of the connecting cavity pass through both ends of the outer shaft. An extension shaft is slidably installed within the connecting cavity. Rings are fixedly connected to both ends of the connecting cavity. One end of the extension shaft is inserted into a ring, and a fixing ring is fixed to the outer wall of the other end. The fixing ring slides within the connecting cavity and is in a limiting fit with the ring. By providing a slidable extension shaft within the connecting cavity of the outer shaft, the total length of the trunnion can be flexibly adjusted, allowing a single-specification trunnion to adapt to various equipment interfaces with different installation spacings. This improves the product's versatility, reduces the types of parts and inventory costs, and facilitates on-site installation and debugging of the equipment.

Description

Technical Field

[0001] This utility model relates to the field of trunnions, specifically a stainless steel trunnion. Background Technology

[0002] As a key mechanical connection component, stainless steel trunnions are widely used in various mechanical equipment that require support and allow rotation, such as rotary kilns, large valves, and boom connection points of engineering machinery.

[0003] Traditional trunnions are typically single-shaft structures with a fixed length. In practical applications, especially in situations where equipment installation space is limited or needs to adapt to different equipment specifications, fixed-length trunnions lack flexibility. To adjust the distance between connection points or adapt to different mounting bases, it is often necessary to customize trunnions of specific lengths, which not only increases production costs and inventory pressure but also extends the equipment installation and commissioning cycle. Therefore, a stainless steel trunnion is proposed. Utility Model Content

[0004] The purpose of this invention is to provide a stainless steel trunnion to solve the problems mentioned in the background art.

[0005] The objective of this utility model can be achieved through the following technical solutions:

[0006] A stainless steel trunnion includes an outer shaft with a connecting cavity inside. The two ends of the connecting cavity pass through the two ends of the outer shaft respectively. An extension shaft is slidably installed in the connecting cavity. A ring body is fixedly connected to both ends of the connecting cavity. One end of the extension shaft is inserted into the ring body, and a fixing ring is fixedly connected to the outer wall of the other end. The fixing ring slides in the connecting cavity and is limited in position to the ring body.

[0007] Preferably, multiple sets of mounting holes are provided at both ends of the outer shaft. The multiple sets of mounting holes located at the same end are arranged in a circumferential array. Screws are threaded into the multiple sets of mounting holes, and the ends of the multiple sets of screws are respectively threaded to the two sets of ring sidewalls.

[0008] Preferably, an inner ring is fixedly connected to the middle of the outer shaft, and an inner shaft is fixedly connected to the inner ring. The inner shaft and the outer shaft are coaxial, and the length of the inner shaft is less than the length of the outer shaft. The extension shaft is hollow inside, and the inner shaft and the extension shaft are in sliding fit.

[0009] Preferably, the inner wall of the extension shaft is provided with reinforcing ribs, the reinforcing ribs are honeycomb shaped, and the thickness of the space between the inner wall of the extension shaft and the outer wall of the inner shaft is greater than the thickness of the reinforcing ribs.

[0010] Preferably, a sealing ring is installed on both the outer shaft end and the ring body end, the sealing ring is sleeved on the outside of the extension shaft, and the inner wall of the sealing ring is in sealing fit with the outer wall of the extension shaft.

[0011] Preferably, one side of the sealing ring is fixed with two sets of annular protrusions, the two sets of annular protrusions are concentric, and annular grooves are provided at both the outer shaft end and the ring body end, and the two sets of annular protrusions are respectively engaged with the two sets of annular grooves.

[0012] The beneficial effects of this utility model are:

[0013] 1. This utility model achieves flexible adjustment of the total length of the trunnion by setting a sliding extension shaft in the connecting cavity of the outer shaft, so that a single specification of trunnion can adapt to a variety of equipment interfaces with different installation spacing, thereby improving the versatility of the product, reducing the types of parts and inventory costs, and facilitating on-site installation and debugging of the equipment.

[0014] 2. This utility model enhances the overall bending and deformation resistance of the trunnion by setting an inner shaft with a coaxial core inside the outer shaft and forming a sliding fit with the hollow extension shaft, so that it can still maintain good rigidity when bearing heavy loads. The honeycomb-shaped reinforcing ribs set on the inner wall of the extension shaft further improve its local rigidity and stability, while the reasonable space thickness design ensures smooth relative sliding between the inner shaft and the extension shaft. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of the trunnion of this utility model;

[0017] Figure 2 This is a schematic diagram of the exploded structure of the trunnion of this utility model;

[0018] Figure 3 This is a schematic diagram of the external axial cross-sectional structure of this utility model;

[0019] Figure 4 This is a schematic diagram of the cross-sectional structure of the trunnion of this utility model;

[0020] Figure 5 yes Figure 4 Enlarged schematic diagram of the structure at point A;

[0021] The attached figures are labeled as follows:

[0022] 1. Outer shaft; 2. Inner ring; 3. Inner shaft; 4. Annular groove; 5. Mounting hole; 6. Screw; 7. Ring body; 8. Extension shaft; 9. Reinforcing rib; 10. Fixing ring; 11. Annular protrusion; 12. Sealing ring; 13. Connecting cavity. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0024] A type of stainless steel trunnion, such as Figures 1-5 As shown, the device includes an outer shaft 1, with a connecting cavity 13 inside. Both ends of the connecting cavity 13 pass through both ends of the outer shaft 1. An extension shaft 8 is slidably installed within the connecting cavity 13. One or two sets of extension shafts 8 can be provided. When two sets of extension shafts 8 are provided, they are located at both ends of the outer shaft 1. Ring bodies 7 are fixedly connected to both ends of the connecting cavity 13. One end of the extension shaft 8 is inserted into the ring body 7, and a fixing ring 10 is fixedly connected to the outer wall of the other end. The fixing ring 10 slides within the connecting cavity 13 and is in a limiting fit with the ring body 7. When the ring bodies 7 are installed at both ends of the outer shaft 1, the inner diameter of the ring body 7 is small. Due to the presence of the retaining ring 10, the extension shaft 8 cannot detach from the outer shaft 1. Pushing and pulling the extension shaft 8 can change the length of the extension shaft 8 extending out of the outer shaft 1, thereby changing the total length of the entire trunnion. This allows the trunnion to adapt to various equipment interfaces with different installation spacings, improving the product's versatility, reducing the types of parts and inventory costs, and facilitating on-site installation and debugging of the equipment. After the length between the extension shaft 8 and the outer shaft 1 is adjusted, it is fixed with bolts or other fasteners. It is suitable for connecting two loads within a fixed distance for force transmission.

[0025] Multiple sets of mounting holes 5 are provided at both ends of the outer shaft 1. The multiple sets of mounting holes 5 located at the same end are arranged in a circumferential array. Screws 6 are threaded into the multiple sets of mounting holes 5. The ends of the multiple sets of screws 6 are respectively threaded to the side walls of two sets of ring bodies 7. The screws 6 pass through the mounting holes 5, penetrate the outer shaft 1 and connect to the ring bodies 7, so that the ring bodies 7 are tightly installed at the end of the outer shaft 1. The ring bodies 7 prevent one end of the extension shaft 8 from being separated from the connecting cavity 13.

[0026] An inner ring 2 is fixedly connected to the middle of the outer shaft 1, and an inner shaft 3 is fixedly connected to the inner ring 2. The inner shaft 3 is coaxial with the outer shaft 1, and the length of the inner shaft 3 is less than the length of the outer shaft 1. The extension shaft 8 is hollow inside, and the inner shaft 3 and the extension shaft 8 are in sliding fit.

[0027] The outer shaft 1, extension shaft 8, inner shaft 3 and other structures are all made of stainless steel. The inner shaft 3 is installed in the connecting cavity 13 through the inner ring 2. The entire trunnion forms a double-layer support structure, which significantly enhances the bending resistance. The inner shaft 3 and the extension shaft 8 form a sliding fit to ensure that the extension shaft 8 can extend and retract smoothly along the axis.

[0028] The inner wall of the extension shaft 8 is provided with reinforcing ribs 9, which are honeycomb-shaped. The thickness of the space between the inner wall of the extension shaft 8 and the outer wall of the inner shaft 3 is greater than the thickness of the reinforcing ribs 9. The honeycomb-shaped reinforcing ribs 9 are used to improve the local stiffness and anti-instability of the extension shaft 8 itself, and to ensure that the gap between the inner wall of the extension shaft 8 and the outer surface of the inner shaft 3 is greater than the height of the reinforcing ribs 9, thereby ensuring that the reinforcing ribs 9 will not hinder the normal sliding of the extension shaft 8.

[0029] A sealing ring 12 is installed on both the end of the outer shaft 1 and the end of the ring body 7. The sealing ring 12 is sleeved on the outside of the extension shaft 8, and the inner wall of the sealing ring 12 is sealed to the outer wall of the extension shaft 8. Two sets of annular protrusions 11 are fixed on one side of the sealing ring 12. The two sets of annular protrusions 11 are concentric. Annular grooves 4 are provided at both the end of the outer shaft 1 and the end of the ring body 7. The two sets of annular protrusions 11 are respectively engaged with the two sets of annular grooves 4.

[0030] The sealing ring 12 is fitted onto the exposed part of the extension shaft 8. Its inner hole is equipped with a sealing lip or sealing ring, which fits tightly against the smooth outer surface of the extension shaft 8 to achieve dynamic sealing and effectively prevent dust and moisture from entering the connecting cavity 13. The sealing ring 12 is fixed by two concentric annular protrusions 11 designed on one side of it. Matching annular grooves 4 are machined on the end face of the outer shaft 1 and the end face of the ring body 7, respectively. During installation, the two annular protrusions 11 on the sealing ring 12 are pressed into the corresponding annular grooves 4, and the sealing ring 12 is fixed and initially sealed by interference fit.

[0031] The working principle of the stainless steel trunnion provided by this utility model is as follows:

[0032] When the total length of the trunnion needs to be adjusted to meet installation requirements, the extension shaft 8 is pulled or pushed so that it slides axially within the connecting cavity 13 of the outer shaft 1. The inner wall of the extension shaft 8 slides along the outer surface of the inner shaft 3, while the outer wall of the extension shaft 8 is guided by the rings 7 at both ends, ensuring the linearity and stability of the movement. The total length of the trunnion can be changed. The honeycomb-shaped reinforcing ribs 9 ensure that the extension shaft 8 will not be locally crushed or deformed during sliding and bearing load. The load is transmitted through the extension shaft 8 and the outer shaft 1.

[0033] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A stainless steel trunnion, comprising an outer shaft (1), characterized in that, The outer shaft (1) has a connecting cavity (13) inside. The two ends of the connecting cavity (13) pass through the two ends of the outer shaft (1). An extension shaft (8) is slidably installed in the connecting cavity (13). A ring body (7) is fixedly connected to both ends of the connecting cavity (13). One end of the extension shaft (8) is inserted into the ring body (7), and a fixing ring (10) is fixedly connected to the outer wall of the other end. The fixing ring (10) slides in the connecting cavity (13), and the fixing ring (10) is limited to the ring body (7).

2. The stainless steel trunnion according to claim 1, characterized in that, Multiple sets of mounting holes (5) are opened at both ends of the outer shaft (1). The multiple sets of mounting holes (5) located at the same end are arranged in a circumferential array. Screws (6) are threaded into the multiple sets of mounting holes (5). The ends of the multiple sets of screws (6) are threaded to the side walls of the two sets of ring bodies (7).

3. A stainless steel trunnion according to claim 1, characterized in that, An inner ring (2) is fixedly connected to the middle of the outer shaft (1), and an inner shaft (3) is fixedly connected to the inner ring (2). The inner shaft (3) is coaxial with the outer shaft (1), and the length of the inner shaft (3) is less than the length of the outer shaft (1). The extension shaft (8) is hollow inside, and the inner shaft (3) and the extension shaft (8) are in sliding fit.

4. A stainless steel trunnion according to claim 3, characterized in that, The inner wall of the extension shaft (8) is provided with reinforcing ribs (9), which are honeycomb shaped. The thickness of the space between the inner wall of the extension shaft (8) and the outer wall of the inner shaft (3) is greater than the thickness of the reinforcing ribs (9).

5. A stainless steel trunnion according to claim 1, characterized in that, A sealing ring (12) is installed on both the end of the outer shaft (1) and the end of the ring body (7). The sealing ring (12) is sleeved on the outside of the extension shaft (8), and the inner wall of the sealing ring (12) is sealed to the outer wall of the extension shaft (8).

6. A stainless steel trunnion according to claim 5, characterized in that, The sealing ring (12) has two sets of annular protrusions (11) fixed on one side. The two sets of annular protrusions (11) are concentric. The outer shaft (1) end and the ring body (7) end are both provided with annular grooves (4). The two sets of annular protrusions (11) are respectively engaged with the two sets of annular grooves (4).

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