High-load U-shaped roller sliding bearing
By incorporating seals and multiple roller bearings on both sides of the slider body, the U-shaped roller sliding bearing design solves the problems of noise, poor durability, and insufficient foreign object protection in existing technologies, achieving stability under high loads and extending service life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WEIHAI AMS AUTOMATION EQUIP CO LTD
- Filing Date
- 2025-07-16
- Publication Date
- 2026-05-12
AI Technical Summary
Existing linear guide systems are prone to noise during high-speed operation, their bearing life decreases in dusty environments, and they cannot effectively prevent foreign objects from entering the slider. The roller pins also have poor stability.
The design employs a U-shaped roller sliding bearing, which includes mounting seals on support surfaces on both sides of the slider body, fixing the roller bearings with needle pins and locking screws, and setting multiple roller bearings on the upper and lower parts of the slider body to provide high load-bearing capacity and stability.
This improves the sealing between the slider and the guide rail, prevents foreign objects from entering, ensures the stable fixing of the roller pin, and enhances the movement stability and service life of the slider.
Smart Images
Figure CN224229095U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of sliding bearing technology, specifically relating to a high-load U-shaped roller sliding bearing. Background Technology
[0002] Existing linear guide systems mostly use ball recirculation structures, which are prone to noise when running at high speeds and rely on lubrication to maintain durability. In dusty environments, the bearing life is significantly reduced.
[0003] The prior art, patent publication number CN216077966U, describes a heavy-duty roller slider. In this patent, the guide rail is mounted on a platform or bracket, and the roller is installed in a long hole on the slider via roller pins. The roller pins are fixed in place by set screws, and the roller surface contacts the guide rail surface. Followers are bolted into the follower roll holes of the slider, and the follower surface rolls in contact with the guide rail surface. The followers are divided into two groups with their axes at a certain angle to prevent the slider from detaching from the guide rail. The followers on both sides of the slider and the rollers roll in contact with the guide rail surface from three directions. The rollers and guide rails have line-to-line contact, resulting in a larger contact area and a higher allowable maximum load. This solves the problem of the steel ball having a small point-to-line contact with the guide rail, leading to a smaller load capacity. However, in practical use, the following shortcomings remain: From a practical standpoint, the existing structure still has certain deficiencies in terms of slider movement stability and foreign object protection. It cannot effectively prevent foreign objects from entering the slider, and the stability of fixing the roller pins with set screws is poor, failing to guarantee stable operation.
[0004] Therefore, a high-load U-shaped roller sliding bearing is needed to solve the problems of existing technologies that cannot effectively prevent foreign objects from entering the slider and cannot guarantee the stable operation of the roller pin. Utility Model Content
[0005] The purpose of this invention is to provide a high-load U-shaped roller sliding bearing to solve the problems mentioned in the background art.
[0006] To achieve the above objectives, this utility model provides the following technical solution: a high-load U-shaped roller sliding bearing, comprising a cylindrical guide rail and a slider body, wherein the slider body is slidably disposed on the cylindrical guide rail, and support surfaces are provided on the left and right sides of the slider body. A seal is installed on the slider body through the support surfaces. A first roller bearing is provided on the upper part of the slider body to bear the load of the slider body. A needle roller pin is rotatably mounted on the first roller bearing. A bearing is installed between the needle roller pin and the first roller bearing. A slot is provided on the slider body corresponding to the needle roller pin. The needle roller pin is installed in the slider body through the slot. A locking screw is provided on the outer end of the needle roller pin on the slider body for locking the needle roller pin. A second roller bearing is provided on the front and rear sides of the bottom of the slider body. The second roller bearing is located outside the cylindrical guide rail. A fixing screw is fixedly connected to the second roller bearing. The fixing screw is obliquely installed on the bottom of the slider body.
[0007] It should be noted in the design that there are two first roller bearings on the upper part of the slider body, and they are spaced apart on the left and right.
[0008] It is worth noting that there are two second roller bearings respectively located on the front and rear sides of the bottom of the slider body.
[0009] It should be further noted that both the first roller bearing and the second roller bearing are needle roller bearings or CF bearings.
[0010] In a preferred embodiment, the seal is arranged in a U-shape and is covered by a support on the outside of the cylindrical guide rail.
[0011] Compared with the prior art, the high-load U-shaped roller sliding bearing provided by this utility model has at least the following beneficial effects:
[0012] (1) By providing support surfaces on both sides of the slider body, it is easy to install the seal between the slider body and the cylindrical guide rail. The seal can improve the sealing between the slider body and the cylindrical guide rail, thereby effectively preventing foreign objects from entering the slider body. At the same time, the seal is set with a U-shaped structure, which covers the cylindrical guide rail, making the movement of the slider body more stable and thus improving its service life.
[0013] (2) The slots for mounting matching needle roller pins on the slider body facilitate the installation of the first roller bearing on the upper part of the slider body. The first roller bearing provides high load-bearing capacity, and the locking screws at the ends of the needle roller pins ensure the stable fixing of the first needle roller bearing, further improving the stability and service life of the slider body. Attached Figure Description
[0014] Figure 1 This is a three-dimensional structural diagram of the present invention;
[0015] Figure 2 This is a schematic diagram of the internal cross-sectional structure of this utility model;
[0016] Figure 3 This is a schematic diagram of the internal disassembled structure of this utility model;
[0017] Figure 4 This is a schematic diagram of the first roller bearing structure of this utility model.
[0018] In the diagram: 1. Cylindrical guide rail; 2. Slider body; 201. Slot; 3. First roller bearing; 301. Needle pin; 302. Bearing; 4. Support surface; 5. Second roller bearing; 6. Fixing screw; 7. Seal; 8. Locking screw. Detailed Implementation
[0019] The present invention will be further described below with reference to the embodiments.
[0020] Please see Figure 1-4 This utility model provides a high-load U-shaped roller sliding bearing, including a cylindrical guide rail 1 and a slider body 2. The slider body 2 is slidably mounted on the cylindrical guide rail 1. Support surfaces 4 are provided on the left and right sides of the slider body 2. A seal 7 is installed on the slider body 2 through the support surfaces 4. A first roller bearing 3 is provided on the upper part of the slider body 2 to bear the load of the slider body 2. A needle roller pin 301 is rotatably mounted on the first roller bearing 3. The needle roller pin 301 is correspondingly located in a slot 201 on the slider body 2. The needle roller pin 301 passes through the slot 201. 01 is installed inside the slider body 2. A bearing 302 is installed between the needle roller pin 301 and the first roller bearing 3. A locking screw 8 for locking the needle roller pin 301 is provided on the outer end of the slider body 2. A second roller bearing 5 is provided on the front and rear sides of the bottom of the slider body 2. The second roller bearing 5 is located on the outer side of the cylindrical guide rail 1. A fixing screw 6 is fixedly connected to the second roller bearing 5. The fixing screw 6 is installed obliquely at the bottom of the slider body 2. The sealing element 7 is set in a U-shaped structure and is covered by the support surface 4 on the outside of the cylindrical guide rail 1.
[0021] Among them, the needle roller pin 301 is made of 20CrMnTi alloy steel, and is carburized and quenched to achieve a surface hardness of HRC 58-62 and a core hardness of HRC 30-35, ensuring high bending strength and impact resistance. The seal 7 is made of fluororubber (FKM) molding with a Shore hardness of A70±5. The lip part is added with a polytetrafluoroethylene (PTFE) wear-resistant coating to achieve IP67 dustproof and waterproof rating. The gap between the inner diameter of the U-shaped opening and the cylindrical guide rail 1 is ≤0.1mm, forming an interference seal.
[0022] Specifically, by providing seals 7 on both sides of the slider body 2, foreign objects on the top of the cylindrical guide rail 1 are prevented from entering the interior of the slider body 2. In order to prevent the needle roller pin 301 from falling off, locking screws 8 are provided at the corresponding positions on the slider body 2 to ensure the stable fixation of the first roller bearing 3. The above-mentioned related structures are easy to assemble using standard parts, reducing production costs.
[0023] Further as Figure 1 , Figure 2 and Figure 3 As shown, it is worth noting that there are two first roller bearings 3 on the upper part of the slider body 2, which are spaced apart on the left and right. There are two second roller bearings 5 on the front and rear sides of the bottom of the slider body 2 respectively. A bearing 302 is installed between the second roller bearings 5 and the fixing screw 6.
[0024] Among them, the two first roller bearings 3 at the top bear the vertical load, and the two sets of second roller bearings 5 at the bottom are symmetrically distributed, each bearing the lateral force to suppress the lateral sway of the slider body 2.
[0025] Specifically, the U-shaped slider body 2 covers the cylindrical guide rail 1, and two first roller bearings 3 are set on the top, and second roller bearings 5 are set on the front and rear sides. The three-way roller bearings form line contact with the cylindrical guide rail 1 to ensure its running stability. The first roller bearings 3 set on the top of the slider body 2 are used to bear the load, and the second roller bearings 5 set on the front and rear sides are used to prevent the slider body 2 from shaking.
[0026] As can be seen from the above working process, the support surfaces 4 provided on both sides of the slider body 2 facilitate the installation of the sealing element 7 between the slider body 2 and the cylindrical guide rail 1. The sealing element 7 improves the sealing performance between the slider body 2 and the cylindrical guide rail 1, thereby effectively preventing foreign objects from entering the slider body 2. At the same time, the sealing element 7 is set with a U-shaped structure, which covers the cylindrical guide rail 1, making the movement of the slider body 2 more stable and thus improving its service life.
[0027] Further as Figure 1 , Figure 2 and Figure 3 As shown, it is worth noting that both the first roller bearing 3 and the second roller bearing 5 are needle roller bearings or CF bearings, which are fixed together by the fixing screw 6 and the bearing 302 to form a "roller-needle roller bearing-fixing screw" structure.
[0028] This solution has the following working process: When this device is in use, the U-shaped slider body 2 covers the cylindrical guide rail 1, and two first roller bearings 3 are set on the top, and second roller bearings 5 are set on the front and rear sides. The three-way roller bearings form line contact with the cylindrical guide rail 1 to ensure its operational stability. The first roller bearings 3 set on the top of the slider body 2 are used to bear the load, and the second roller bearings 5 set on the front and rear sides are used to prevent the slider body 2 from shaking. All roller bearings are needle roller bearings or CF bearings, which are fixed by fixing screws 6 to form a "roller-needle roller bearing-fixing screw" structure. Sealing parts 7 are set on both sides of the slider body 2 to prevent foreign objects on the top of the cylindrical guide rail 1 from entering the slider body 2. In order to prevent the needle roller pin 301 from falling off, locking screws 8 are set at corresponding positions on the slider body 2 to ensure the stable fixation of the first roller bearings 3. The above-mentioned related structures use standard parts, which are easy to assemble and reduce production costs.
[0029] In summary: The support surfaces 4 on both sides of the slider body 2 facilitate the installation of the seal 7 between the slider body 2 and the cylindrical guide rail 1. The seal 7 improves the sealing between the slider body 2 and the cylindrical guide rail 1, effectively preventing foreign objects from entering the slider body 2. Furthermore, the U-shaped structure of the seal 7, which covers the cylindrical guide rail 1, makes the movement of the slider body 2 more stable, thus extending its service life. The slot 201 on the slider body 2, which matches the needle roller pin 301, facilitates the installation of the first roller bearing 3 on the upper part of the slider body 2. The first roller bearing 3 provides high load-bearing capacity, and the locking screw 8 at the end of the needle roller pin 301 ensures the stable fixation of the first needle roller bearing 3, further improving the stability and service life of the slider body 2.
[0030] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.
Claims
1. A high-load U-shaped roller sliding bearing, comprising a cylindrical guide rail (1) and a slider body (2), wherein the slider body (2) is slidably disposed on the cylindrical guide rail (1), characterized in that: The slider body (2) has support surfaces (4) on its left and right sides. A seal (7) is installed on the slider body (2) through the support surfaces (4). A first roller bearing (3) is provided on the upper part of the slider body (2) to bear the load of the slider body (2). A needle pin (301) is rotatably installed on the first roller bearing (3). A bearing (302) is installed between the needle pin (301) and the first roller bearing (3). A slot (20) is opened on the slider body (2) corresponding to the needle pin (301). 1) The needle roller pin (301) is installed in the slider body (2) through the slot (201). The outer end of the needle roller pin (301) is provided with a locking screw (8) for locking the needle roller pin (301) on the slider body (2). The bottom front and rear sides of the slider body (2) are provided with a second roller bearing (5). The second roller bearing (5) is located on the outside of the cylindrical guide rail (1). A fixing screw (6) is fixedly connected to the second roller bearing (5). The fixing screw (6) is installed obliquely at the bottom of the slider body (2).
2. The high-load U-shaped roller sliding bearing according to claim 1, characterized in that: Two first roller bearings (3) are provided on the upper part of the slider body (2) and are spaced apart on the left and right.
3. The high-load U-shaped roller sliding bearing according to claim 2, characterized in that: The second roller bearing (5) is provided in two locations on the front and rear sides of the bottom of the slider body (2).
4. A high-load U-shaped roller sliding bearing according to claim 3, characterized in that: Both the first roller bearing (3) and the second roller bearing (5) are needle roller bearings or CF bearings.
5. A high-load U-shaped roller sliding bearing according to claim 4, characterized in that: The sealing element (7) is arranged in a U-shape and is covered by the support surface (4) on the outside of the cylindrical guide rail (1).