Guide rail with inclined plane connection structure

Abstract

The utility model discloses a guide rail with an inclined plane connection structure, which comprises a plurality of guide rail units and a sliding block, the plurality of guide rail units are connected in sequence, the inclined plane connection structure is arranged on the guide rail units, and the inclined plane connection structure comprises a first inclined plane part and a second inclined plane part. The first inclined plane parts incline from the upper walls of the slideways on the guide rail units to the end faces, facing the adjacent guide rail units, of the slideways, the second inclined plane parts incline from the lower walls of the slideways to the end faces, facing the adjacent guide rail units, of the slideways, and the inclined plane connection structures at the joints of every two adjacent guide rail units are symmetrical. The first inclined plane part and the second inclined plane part jointly form a smooth transition channel, the balls continuously roll along the inclined plane when passing through, progressive contact surface conversion is formed, the balls are tightly attached to the inner wall of the inclined plane all the time, and vibration caused by gaps or dislocation is avoided; under the combined action of the first inclined surface part and the second inclined surface part, the supporting force borne by the sliding block at the connection part is more uniform, and the sliding block is prevented from inclining or shaking in the transition process.

Description

A guide rail with a beveled connection structure Technical Field

[0001] This invention relates to the field of ball bearing guide technology, and more particularly to a guide rail with a beveled joint structure. Background Technology

[0002] When connecting square guide rails, even if the two guide rails are straightened and aligned with a dial indicator, the relative torsion of the two adjacent slides at the joint makes the rolling balls that are tightly fitted to the slides easily obstructed by the height and angle differences between the two slides. The height difference can easily cause the balls to be impacted and vibrate, leading to local stress concentration and accelerating the wear between the balls and the slides. Sudden angle changes can easily cause the balls to deviate from the expected trajectory, resulting in discontinuous movement of the slider. This can cause the balls to jam or impact, generating high-frequency noise, increasing frictional wear, and affecting the positioning accuracy of the slider. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a guide rail with a beveled joint structure to achieve a smooth transition between the slider and the ball at the connection of adjacent guide rail units.

[0004] The objective of this utility model is achieved through the following technical solution:

[0005] A guide rail with a beveled connection structure includes multiple guide rail units and a slider. The multiple guide rail units are connected in sequence. Parallel slides are provided on both sides of each guide rail unit. A ball bearing is provided inside the slider. The guide rail unit is provided with a beveled connection structure, which includes a first beveled portion and a second beveled portion. The first beveled portion is inclined from the upper wall of the slide towards the end face of the slide towards the adjacent guide rail unit. The second beveled portion is inclined from the lower wall of the slide towards the end face of the slide towards the adjacent guide rail unit. The beveled connection structures at the connection points of two adjacent guide rail units are symmetrical to each other.

[0006] The guide rail unit described above can be configured as either straight or curved.

[0007] In a preferred embodiment, the first inclined portion extends to the top surface of the guide rail unit.

[0008] In a preferred embodiment, the connecting structure further includes a third inclined surface, which slopes from the bottom side of the guide rail unit toward the end face of the adjacent guide rail unit. The third inclined surfaces at the connection points of two adjacent guide rail units are symmetrical to each other. When the slider passes through the connection point of the adjacent guide rail unit, it contacts the upper side of the third inclined surface.

[0009] In a preferred embodiment, the orthographic projection length and tilt angle of the first, second, and third inclined surfaces are the same, and the orthographic projection length of the second inclined surface is 2.5 times the diameter of the ball.

[0010] In a preferred embodiment, the first, second, and third inclined surfaces are formed by grinding.

[0011] In a preferred embodiment, the slider is equipped with a sensor for detecting the relative positional deviation of the first, second, and third inclined surfaces at the connection point of the two guide rail units.

[0012] In a preferred embodiment, each side of the guide rail unit is provided with two slides, which are arranged parallel to each other vertically. The second inclined surface is located between the two slides, and the edge of the second inclined surface facing the slide is connected by an arc-shaped transition.

[0013] The beneficial effects of this utility model are:

[0014] 1. The guide rail with inclined surface connection structure of this utility model forms a smooth transition channel by tilting the first inclined surface from the upper wall of the slide rail towards the end face of the adjacent guide rail unit, and the second inclined surface tilting symmetrically from the lower wall. The balls roll continuously along the inclined surface when passing through, forming a gradual contact surface transition, so that the balls are always in close contact with the inner wall of the inclined surface, avoiding vibration caused by gaps or misalignment. The rolling resistance of the balls is reduced, the frictional heat is reduced, the system operates more smoothly and quietly, and vertical drops or suspension are avoided, significantly reducing impact load and extending the life of the guide rail. Through the symmetrical design of the inclined surface connection structure at the connection of two adjacent guide rail units, the balls transition synchronously in height and direction at the connection of adjacent guide rail units, ensuring uniform force change of the balls and smooth and controllable movement trajectory. This effectively eliminates positioning errors caused by trajectory deviation and improves the repeatability of the guide rail unit connection.

[0015] 2. The guide rail with the inclined surface connection structure of this utility model further extends the first inclined surface to the top surface of the guide rail unit and provides a third inclined surface. The first inclined surface extending to the top surface of the guide rail unit mainly acts on the upper part of the slider, while the third inclined surface acts on the bottom of the slider. The combined action of the two makes the supporting force on the slider at the connection point more uniform, avoiding the slider from tilting or swaying during the transition. This upper and lower cooperating support and guiding method can further reduce the vibration and impact of the slider at the connection point, improve the consistency of the slider and ball movement, and maintain the stability and reliability of the slider running on the guide rail. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 is a schematic diagram of the guide rail with the inclined surface connection structure of this utility model;

[0018] Figure 2 is an enlarged view of section A in Figure 1 of this utility model. Detailed Implementation

[0019] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of this utility model. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0020] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "upper," "lower," "vertical," "horizontal," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0021] Referring to Figures 1 and 2, the guide rail with the inclined connecting structure 120 includes multiple guide rail units 100 and sliders 200. The multiple guide rail units 100 are connected in sequence. Parallel slides 110 are provided on both sides of the guide rail unit 100. The slider 200 contains ball bearings 210. The guide rail unit 100 is characterized by having an inclined connecting structure 120. The inclined connecting structure 120 includes a first inclined portion 121 and a second inclined portion 122. The first inclined portion 121 is inclined from the upper wall of the slide 110 toward the end face of the slide 110 toward the adjacent guide rail unit 100. The second inclined portion 122 is inclined from the lower wall of the slide 110 toward the end face of the slide 110 toward the adjacent guide rail unit 100. The inclined connecting structures 120 at the connection of two adjacent guide rail units 100 are symmetrical to each other.

[0022] It should be noted that there is a certain height difference at the connection of the traditional guide rail unit 100, especially in the connection of the circular line, there is a certain degree of twisting. When the ball bearing 210 passes through, it needs to adapt to the changes in height and angle instantly, which may cause impact or vibration. In this embodiment, a sloping connection structure 120 is designed on the guide rail unit 100. Since the first sloping part 121 of the sloping connection structure 120 is inclined from the upper wall of the slide rail 110 to the end face of the adjacent guide rail unit 100, when the ball 210 moves from the current guide rail unit 100 to the adjacent guide rail unit 100, the first sloping part 121 will guide the ball 210 to gradually leave the upper wall of the current slide rail 110 and roll towards the end face of the slide rail 110 or vice versa. Similarly, similar to the first sloping part 121, the second sloping part 122 will guide the ball 210 to gradually leave the lower wall of the current slide rail 110 and roll towards the end face of the slide rail 110 or vice versa. Because the inclined joint structures 120 at the connection points of adjacent guide rail units 100 are symmetrical, a symmetrical inclined transition structure is formed between adjacent guide rail units 100. That is, the first and second inclined surfaces can jointly guide the ball 210 to gradually adapt to the new contact surface and maintain contact with the surface of the slide rail 110. This avoids impacts or jamming caused by brief suspension or collisions due to height differences or sudden angle changes, thus maintaining the continuity and stability of the movement. The smooth transition reduces the bouncing or offset of the ball 210 at the joint, thereby improving the positioning accuracy and repeatability of the guide rail system, reducing wear on the ball 210 and the slide rail 110, and significantly increasing the service life of the guide rail system while reducing maintenance costs. Thus, by setting symmetrical inclined joint structures 120 at both ends of the slide rail 110, the ball 210 achieves a smooth transition between adjacent guide rail units 100.

[0023] This embodiment forms a smooth transition channel by tilting the first inclined surface 121 from the upper wall of the slide rail 110 towards the end face of the adjacent guide rail unit 100, and the second inclined surface 122 symmetrically tilting from the lower wall. The ball bearing 210 rolls continuously along the inclined surface as it passes through, creating a gradual contact surface transition. This ensures that the ball bearing 210 remains in close contact with the inner wall of the inclined surface, preventing vibrations caused by gaps or misalignments. The rolling resistance of the ball bearing 210 is reduced, frictional heat is decreased, and the system operates more smoothly and quietly. Vertical drops or suspension are avoided, significantly reducing impact loads and extending the life of the guide rail. The symmetrical design of the inclined connection structure 120 at the connection point of adjacent guide rail units 100 ensures that the ball bearing 210 transitions synchronously in height and direction at the connection point, guaranteeing uniform force distribution and smooth, controllable movement trajectory. This effectively eliminates positioning errors caused by trajectory deviations and improves the repeatability of the guide rail system.

[0024] Due to abrupt changes or twists at the joints of traditional guide rails, the slider 200 needs to overcome the impact force generated by the vertical drop or suspension of the ball 210. To prevent discontinuous movement of the slider 200 and asynchronous movement of the ball 210, the first inclined surface 121 is extended to the top surface of the guide rail unit 100. After the first inclined surface 121 extends to the top surface, the ball 210 rolls smoothly along the inclined surface to the adjacent guide rail unit 100. When the slider 200 moves with the ball 210, it does not need to bear the load of abrupt changes in the vertical direction, and the movement trajectory is more continuous. Since the movement trajectory of the slider 200 is continuous, the movement continuity of the slider 200 and the ball 210 at this point is consistent. That is, the slider 200 always maintains contact with the ball 210, reducing the slider 200 offset or vibration caused by the slider 200 losing contact with the ball 210.

[0025] To further improve the continuity and stability of the slider 200's movement, the connecting structure also includes a third inclined surface 123. The third inclined surface 123 is inclined from the bottom side of the guide rail unit 100 toward the end face of the adjacent guide rail unit 100. The third inclined surface 123 at the connection of two adjacent guide rail units 100 are symmetrical to each other. When the slider 200 passes through the connection of the adjacent guide rail unit 100, it contacts the upper side of the third inclined surface 123.

[0026] It should be noted that the third inclined surface 123 provides additional support for the bottom of the slider 200, and the tilt direction of the third inclined surface 123 is also matched with the moving direction of the slider 200, providing a horizontal guiding force for the slider 200 and helping the slider 200 to smoothly cross the connection of the guide rail unit 100. Meanwhile, the third inclined surface 123 cooperates with the first inclined surface 121 to provide support and guidance for the slider 200 from different positions. Combined with the design of the first inclined surface 121 extending to the top surface of the guide rail unit 100, the two work together to ensure that the slider 200 receives good support and guidance in both vertical and horizontal directions when passing through the joint of adjacent guide rail units 100. The first inclined surface 121 mainly acts on the upper part of the slider 200, while the third inclined surface 123 acts on the bottom of the slider 200. The combined effect of the two makes the support force on the slider 200 at the joint more uniform, avoiding tilting or swaying of the slider 200 during the transition. This upper and lower cooperation in support and guidance can further reduce the vibration and impact of the slider 200 at the joint, and improve the stability and reliability of the slider 200 running on the guide rail.

[0027] Preferably, the first, second, and third inclined surfaces 123 have the same projected length and inclination angle. It should be noted that when the slider 200 and its ball bearings 210 pass through the joint, they are subjected to forces from different directions, including lateral forces in the horizontal direction and pressure in the vertical direction. Having the same length and inclination angle for the three inclined surfaces ensures that the forces borne by each inclined surface are more evenly distributed in time and space throughout the entire contact process between the slider 200 and the inclined surface. If the lengths and angles of the three inclined surfaces are inconsistent, stress concentration may occur at a location with a shorter contact length, accelerating wear and fatigue failure at that location and reducing the service life of the guide rail system. Inclined surfaces with the same length and angle avoid this situation, distributing stress evenly across the entire inclined surface. When the slider 200 and the ball 210 pass through the joint, they simultaneously contact and transition with three inclined surfaces. The three inclined surfaces have the same length and angle, which ensures that the transition time and distance of the slider 200 and the ball 210 on each inclined surface are consistent. Moreover, each inclined surface can synchronously adjust the movement of the slider 200 within the same time, reducing the vibration and impact caused by sudden changes in the movement state, thereby making the change in the movement state of the slider 200 more stable.

[0028] Preferably, the orthographic projection length of the second inclined surface 122 is 2.5 times the diameter of the ball 210. It should be noted that a sufficient transition distance allows the ball 210 enough time and space to adjust its motion state when transitioning from one guide rail unit 100 to another, avoiding instability due to an excessively short transition distance. This ensures the ball 210 has sufficient transition distance on the connecting inclined surface, enhancing the stability of its sliding motion. However, if the transition distance is too long, the contact time between the ball 210 and the second inclined surface 122 increases when passing through the connecting point, leading to a more complex force distribution and potentially uneven force distribution. This can cause the slider 200 to wobble or deviate during operation, affecting the smoothness and accuracy of its operation.

[0029] Because grinding allows for convenient and precise control of the length and angle of slender bevels, the first, second, and third bevel sections 123 are formed by grinding. It is understandable that the accuracy of the bevel angle directly affects the fit between adjacent guide rail units 100, while the length determines the effective range and mating length of the connection. Grinding easily ensures high precision for both, helping adjacent guide rail units 100 achieve precise docking during connection, improving the overall accuracy of the connection, and thus ensuring a smooth transition of the slider 200 when passing through the connection point.

[0030] A sensor (not shown in the figure) is installed on the slider 200 to detect the relative positional deviation of the first, second, and third inclined surfaces 123 at the connection point of the two guide rail units 100. It can be understood that installing sensors on the slider 200 allows for real-time monitoring of the distance between each inclined surface at the connection point and the reference point of the slider 200, enabling timely detection of relative positional deviations. When the deviation exceeds a threshold, the control system automatically issues an alarm and adjusts the position of the guide rail unit 100, thus achieving dynamic maintenance of the connection's stability and accuracy.

[0031] In one specific implementation, each guide rail unit 100 is provided with two slide rails 110, which are arranged vertically and horizontally in parallel.

[0032] Understandably, a single slide rail 110 must independently bear the entire force of the slider 200 and the load. The double slide rail 110 design distributes the load to the two slide rails 110 through vertical distribution. The slider 200 contacts the upper and lower slide rails 110 through the ball bearings 210, forming multi-point support. When the slider 200 is subjected to eccentric load (such as force on one side), the upper and lower slide rails 110 can work together to compensate for uneven force, preventing the slider 200 from tilting or getting stuck. The double slide rail 110 design is arranged in parallel vertically to ensure that the ball bearings 210 move synchronously in the two slide rails 110 and provide vertical support for the slider 200. When the slider 200 passes through the joint, the speed and direction of the upper and lower ball bearings 210 are consistent, so that the slider 200 and the ball bearings 210 always maintain the same direction and speed of movement at the joint, improving the stability of movement.

[0033] Furthermore, the second inclined surface 122 is located between the two slide rails 110, and the edge of the second inclined surface 122 facing the slide rail 110 adopts a transition connection. It should be noted that the contact surface between the ball 210 and the inclined surface changes with the inclination. The ball 210 will inevitably contact the edge of the inclined surface at the connection of adjacent guide rail units 100. The arc transition connection can reduce the impact and stress concentration caused by the sharp corners of the ball 210 during movement, making the movement of the ball 210 smoother, and also reducing the wear on the ball 210 and the slide rail 110.

[0034] The guide rail unit 100 can be linear or arc-shaped. The guide rail unit 100 is modularly designed and can be connected according to different application scenarios and motion requirements.

[0035] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A guide rail with a beveled connection structure, comprising multiple guide rail units and a slider, wherein the multiple guide rail units are connected sequentially, parallel sliding tracks are provided on both sides of each guide rail unit, and ball bearings are provided inside the slider, characterized in that... The guide rail unit is provided with a sloped connection structure, which includes a first sloped part and a second sloped part. The first sloped part is inclined from the upper wall of the slide rail toward the end face of the slide rail toward the adjacent guide rail unit, and the second sloped part is inclined from the lower wall of the slide rail toward the end face of the slide rail toward the adjacent guide rail unit. The sloped connection structures at the connection of two adjacent guide rail units are symmetrical to each other.

2. The guide rail with a beveled connection structure according to claim 1, characterized in that, The first beveled portion extends to the top surface of the guide rail unit.

3. The guide rail with a beveled connection structure according to claim 2, characterized in that, The connecting structure also includes a third inclined surface, which slopes from the bottom side of the guide rail unit toward the end face of the adjacent guide rail unit. The third inclined surfaces at the connection of two adjacent guide rail units are symmetrical to each other. When the slider passes through the connection of the adjacent guide rail units, it contacts the upper side of the third inclined surface.

4. The guide rail with a beveled connection structure according to claim 3, characterized in that, The orthographic projection length and tilt angle of the first, second and third inclined surfaces are the same.

5. The guide rail with a beveled connection structure according to claim 4, characterized in that, The orthographic projection length of the second bevel is 2.5 times the diameter of the ball.

6. The guide rail with a beveled connection structure according to claim 5, characterized in that, The first, second, and third inclined surfaces are shaped by grinding.

7. The guide rail with a beveled connection structure according to claim 6, characterized in that, The slider is equipped with a sensor for detecting the relative positional deviation of the first, second, and third inclined surfaces at the connection between the two guide rail units.

8. The guide rail with a beveled connection structure according to claim 1, characterized in that, Each side of the guide rail unit is provided with two slide rails, which are arranged vertically and parallel to each other.

9. The guide rail with a beveled connection structure according to claim 8, characterized in that, The second inclined surface is located between the two slides, and the side of the second inclined surface facing the slide is connected by an arc-shaped transition.

10. The guide rail with a beveled connection structure according to claim 1, characterized in that, The guide rail unit can be linear or arc-shaped.

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