Three-axis anti-rotation rolling type linear motion pair

Abstract

The invention relates to the technical field of mechanical sliding structures, and discloses a three-shaft anti-rotation rolling type linear motion pair which comprises three guide shafts, the three guide shafts penetrate through a cabin in parallel, a roller seat is fixedly installed at the end of the cabin, a roller is installed in the roller seat in a limited mode and tightly attached to the guide shafts, and gaps exist between the guide shafts and the cabin. Through innovative multi-guide-shaft layout and roller configuration, the contradiction between the bearing capacity and the service life of a traditional linear motion pair is broken through, the design of the three guide shafts evenly distributed on the circumference and the end face outer frame type roller seats is adopted, the four rollers evenly distributed on the circumference in each group are matched, and a three-point positioning and multi-line contact composite supporting structure is formed; jumping of the bearing capacity is achieved based on space geometry optimization, and the problem of unbalance loading abrasion of rollers caused by a cantilever structure is effectively solved based on rigid supporting of the frame type roller seats.

Description

Technical Field

[0001] This invention relates to the field of mechanical sliding structure technology. Background Technology

[0002] In some marine installations, a linear motion mechanism is needed that can both prevent the hull from rotating and allow for vertical sliding. Due to the uncertainty of the force direction on the hull, the sliding stroke of this sliding linear motion mechanism is not completely fixed for each operation, and it is a continuous, long-term working mechanism.

[0003] The existing sliding mechanisms have the following main problems: 1. The service life of conventional sliding kinematic pairs is generally short, only a few tens of days; 2. The built-in roller mechanism is very inconvenient to inspect and maintain; 3. The roller direction is not set properly, which makes the rollers easy to be damaged when the cabin is subjected to force in any direction. Summary of the Invention

[0004] The purpose of this invention is to provide a three-axis anti-rotation rolling linear motion pair. Through an innovative multi-guide shaft layout and roller configuration, it breaks through the contradiction between load-bearing capacity and lifespan of traditional linear motion pairs. It can ensure the rigidity and strength of the cabin, as well as the sealing performance of the cabin interior, and facilitates maintenance and replacement.

[0005] To solve the above-mentioned technical problems, the present invention provides a three-axis anti-rotation rolling linear motion pair, including guide shafts, there are three guide shafts, the three guide shafts pass through the cabin in parallel, a roller seat is fixedly installed at the end of the cabin, a roller limiter is installed in the roller seat, the roller is in close contact with the guide shaft, and there is a gap between the guide shaft and the cabin.

[0006] The three guide shafts are evenly distributed around the circumference of the cabin's axis.

[0007] A set of multiple rollers is installed at each end of the cabin, corresponding to each guide shaft.

[0008] Each group of rollers is evenly distributed around the circumference of the guide shaft's axis.

[0009] The cabin contains a conduit structure, through which a guide shaft passes.

[0010] The roller is mounted on a bearing, the bearing is fixed to the roller seat by a roller pin, and the roller pin is fixed to the roller seat by a nut.

[0011] The roller base has a frame structure.

[0012] In the cross-sectional projection, the distance between the center of the guide shaft and the center of the cabin is 0.4 to 0.6 times the radius of the cabin.

[0013] Each group of rollers has four rollers.

[0014] The roller seat is located outside the end face of the cabin.

[0015] Compared to existing technologies, this invention utilizes a three-axis centering and guiding system with rigid connections at both ends to ensure the centering and stable operation of the cabin. This guarantees both the rigidity and strength of the cabin and its internal sealing performance. The main structure is easy to inspect and replace. The main components are arranged in multiple circumferentially to effectively ensure that any external force is applied in any direction, allowing the rollers to adapt to changes in force. Through an innovative multi-guide shaft layout and roller configuration, it overcomes the contradiction between load-bearing capacity and lifespan in traditional linear motion pairs. The design employs three circumferentially distributed guide shafts and an end-face outer frame roller seat, combined with four circumferentially distributed rollers in each group, forming a composite support structure of "three-point positioning + multi-line contact." Based on spatial geometric optimization, it achieves a leap in load-bearing capacity. The rigid support of the frame roller seat effectively avoids the roller wear problem caused by cantilever structures.

[0016] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, and in order to make the above and other objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention are described below. Attached Figure Description

[0017] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0018] Figure 1 This is a schematic diagram of the structure of at least one embodiment of the present invention; Figure 2 yes Figure 1 Sectional view of plane AA.

[0019] In the diagram: 1-roller seat, 2-roller, 3-guide shaft, 4-chamber, 5-nut, 6-bearing, 7-roller pin. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this invention clearer, the embodiments of this invention will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details are presented in the embodiments of this invention to facilitate a better understanding of this application. However, the technical solutions claimed in this application can be implemented even without these technical details and various variations and modifications based on the following embodiments. The division of the following embodiments is for ease of description and should not constitute any limitation on the specific implementation of this invention. The embodiments can be combined with and referenced by each other without contradiction.

[0021] Example 1 like Figure 1 and 2 The three-axis anti-rotation rolling linear motion pair shown includes a guide shaft 3. Further, there are three guide shafts 3, which pass through the cabin 4 in parallel. A roller seat 1 is fixedly installed at the end of the cabin 4, and a roller 2 is limited and installed in the roller seat 1. The roller 2 is close to the guide shaft 3, and there is a gap between the guide shaft 3 and the cabin 4.

[0022] Example 2 Based on Embodiment 1, the three guide shafts 3 are evenly distributed around the circumference of the cabin 4 with the axis of the cabin 4 as the center.

[0023] Furthermore, a set of multiple rollers 2 are installed at each end of the cabin 4 corresponding to the position of each guide shaft 3.

[0024] Furthermore, each group of rollers 2 is evenly distributed around the circumference of the axis of the guide shaft 3.

[0025] Preferably, each group of rollers 2 has four rollers.

[0026] Furthermore, roller 2 is mounted on bearing 6, and bearing 6 is fixed to roller seat 1 by roller pin 7, which is fixed to roller seat 1 by nut 5.

[0027] Example 3 Based on Embodiment 1, the cabin 4 has a conduit structure, and the guide shaft 3 passes through the conduit structure.

[0028] Furthermore, the roller seat 1 has a frame structure.

[0029] Furthermore, in the cross-sectional projection, the distance between the center of the guide axis 3 and the center of the cabin 4 is 0.4 to 0.6 times the radius of the cabin 4.

[0030] Furthermore, the roller seat 1 is located outside the end face of the cabin 4.

[0031] Example 4 Based on the above embodiment, three guide shafts 3 pass through the guide holes of the cabin 4 respectively, and their two ends are rigidly connected to form the track of the rolling sliding pair. Six roller seats 1 are rigidly connected to both ends of the guide tube of the cabin 4 respectively. Rollers 2 are installed in the support mounting holes of the roller seats by roller pins 7, bearings 6 and nuts 5 respectively.

[0032] Three conduits are evenly distributed around the circumference of the cabin 4, and frames are installed at both ends of the conduits to ensure the strength of the conduit connection.

[0033] The roller seat 1 is fixed to both ends of the guide tube of the cabin 4 and is completely exposed outside the cabin body, which facilitates the inspection, maintenance or replacement of the roller operation.

[0034] Roller 2 is installed in the mounting support hole of roller seat using roller pin 7, bearing 6 and nut 5. The shape of roller matches the outer diameter of guide shaft 3 to ensure that the force requirements of roller meet the usage requirements. The pin and nut are connected for easy replacement.

[0035] The roller 2 is supported on the roller pin 7, and the bearings 6 at both ends are used to ensure that it can withstand radial and axial forces. The inner hole of the middle section of the roller 2 is fitted with the roller pin 7 with a small clearance. When the cabin 4 is subjected to a large external force impacting the roller 2, the middle section of the roller 2 can be directly supported on the roller pin 7, reducing the impact load on the bearings at both ends of the roller 2 to protect the bearings.

[0036] The guide shaft 3 is supported on the rollers at both ends by three guide tubes that pass through the cabin 4 respectively. The two ends of the three guide shafts 3 are rigidly connected to form a track for the rolling sliding pair, ensuring that the cabin 4 rolls and slides along a certain track.

[0037] When four sets of rollers are evenly distributed around the circumference of roller seat 1 and arranged at both ends of the guide tube of hull 4, it is also necessary to ensure that the central axis of two sets of rollers in roller seat 1 is always perpendicular to the line connecting the center of roller seat 1 and the center of hull 4.

[0038] Thus, the three guide shafts 3 are rigidly connected at both ends to form a frame-type guide rail. The cabin 4 is equipped with three circumferentially distributed guide tubes to give the cabin 4 strength and sealing performance. The roller seat 1 is rigidly connected to the two ends of the three guide tubes of the cabin 4 in such a way that the axes of any two sets of rollers are perpendicular to the line connecting the center of the roller seat and the center of the cabin. The rollers 2 are fixed to the roller seat 1 at corresponding positions through nuts 5, bearings 6 and roller pins 7.

[0039] The cabin 4 moves with the wave force, and the fixed frame formed by the three guide shafts 3 remains basically still. The cabin 4, with the fixed rollers, rolls on the guide shafts 3 to obtain the relative travel between the cabin 4 and the fixed frame of the guide shafts 3, and to ensure the strength, rigidity and flexibility required for the operation of the cabin 4.

[0040] Those skilled in the art will understand that the above embodiments can be modified in form and detail in practical applications without departing from the spirit and scope of the invention.

Claims

1. A three-axis anti-rotation rolling linear motion pair, characterized in that: It comprises guide shafts (3), three of which pass through the cabin (4) in parallel, the cabin (4) has a roller seat (1) fixedly installed at its end, a roller (2) is limitingly installed in the roller seat (1), the roller (2) is in close contact with the guide shaft (3), and there is a gap between the guide shaft (3) and the cabin (4).

2. The tri-axial anti-rotation rolling linear motion pair according to claim 1, characterized in that: The three guide shafts (3) are evenly distributed along the circumference with the axis of the cabin (4) as the center.

3. The tri-axial anti-rotation rolling linear motion pair according to claim 1, characterized in that: The roller (2) is installed with a plurality of groups at the position corresponding to each guide shaft (3) at each end of the cabin (4).

4. The tri-axial anti-rotation rolling linear motion pair according to claim 3, characterized in that: Each group of the roller (2) is evenly distributed along the circumference with the axis of the guide shaft (3) as the center.

5. The tri-axial anti-rotation rolling linear motion pair according to claim 1, characterized in that: The cabin (4) has a guide pipe structure, and the guide shaft (3) passes through the guide pipe structure.

6. The tri-axial anti-rotation rolling linear motion pair according to claim 1, characterized in that: The roller (2) is installed on a bearing (6), the bearing (6) is fixed to the roller seat (1) through a roller pin (7), and the roller pin (7) is fixed to the roller seat (1) through a nut (5).

7. The tri-axial anti-rotation rolling linear motion pair according to claim 1, characterized in that: The roller seat (1) is a frame structure.

8. The tri-axial anti-rotation rolling linear motion pair according to claim 1, characterized in that: In the cross-sectional projection, the distance between the center of the guide shaft (3) and the center of the cabin (4) is 0.4-0.6 times the radius of the cabin (4).

9. The tri-axial anti-rotation rolling linear motion pair according to claim 3, characterized in that: Each group of the roller (2) has four rollers.

10. The tri-axial anti-rotation rolling linear motion pair according to claim 1, characterized in that: The roller seat (1) is located outside the end face of the cabin (4).

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