Double-flange linear bearing
By installing dustproof devices, including dust covers and guide shafts, at both ends of the housing of the double-flange linear bearing, the wear problem caused by impurity intrusion is solved, the bearing life is extended, the stability of the lubricant is maintained, and the operating efficiency of the mechanical system is improved.
Patent Information
- Application Number
- CN202520461390.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-17
- Publication Date
- 2025-11-25
- Estimated Expiration
- 2035-03-17
AI Technical Summary
Existing double-flange linear bearings are easily contaminated by impurities such as dust, metal shavings, and lubricating oil residue in industrial production environments, which leads to accelerated wear of rolling elements and raceways, reduced service life and motion accuracy, and contaminates the lubricant, affecting the lubrication effect.
A dustproof device was designed, including a dust cover and a guide shaft. By setting dust covers and guide shafts at both ends of the housing, external impurities are prevented from entering. Combined with the design of sealing gaskets and limit blocks, the cleanliness of the bearing interior and the stability of the lubricant are ensured.
It effectively prevents external dust and impurities from entering, extends bearing life, maintains the stability of lubricant, and improves the stability of bearing performance and the operating efficiency of mechanical systems.
Smart Images
Figure CN223594766U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of mechanical engineering technology, and in particular to a double-flange linear bearing. Background Technology
[0002] A double-flange linear bearing is a mechanical component used for linear motion. It has two flanges (also called flanges or end caps) that are typically located on either side of the bearing. This design makes the bearing easier to position and secure during installation, while also providing additional support and stability.
[0003] Double-flange linear bearings typically contain rolling elements (such as balls or rollers) and a cage. The rolling elements roll between the inner and outer rings of the bearing, achieving low-friction linear motion. The flanges on both sides are used to secure the bearing and prevent it from shifting during operation.
[0004] Existing double-flange linear bearings, as key components in mechanical transmission, are widely used in various industrial equipment, such as machine tools, automated production lines, and robots. Their main function is to support and guide moving parts in linear reciprocating motion, while bearing certain radial and axial loads. However, in industrial production environments, impurities such as dust, metal shavings, and lubricating oil residue can easily penetrate into the bearing, leading to accelerated wear of the rolling elements and raceways, thereby reducing the bearing's service life and motion accuracy. At the same time, the intrusion of dust and impurities can also contaminate the lubricant inside the bearing, resulting in reduced lubrication effect and further aggravating wear. Utility Model Content
[0005] The purpose of this utility model is to at least solve one of the technical problems existing in the prior art, and to provide a double flange linear bearing that can solve the problem that in industrial production environments, impurities such as dust, metal shavings, and lubricating oil residue can easily penetrate into the bearing, leading to increased wear of the rolling elements and raceways, thereby reducing the service life and motion accuracy of the bearing. At the same time, the intrusion of dust and impurities can also contaminate the lubricant inside the bearing, resulting in a decrease in lubrication effect and further aggravating wear.
[0006] To achieve the above objectives, this utility model provides the following technical solution: a double-flange linear bearing, including a housing, with dustproof devices provided at both ends of the housing;
[0007] The dustproof device includes a dustproof cover and a guide shaft. The guide shaft is installed inside the housing. A groove is opened on one side of the outer wall of the dustproof cover. Four T-shaped blocks are fixedly connected to the inner wall of the groove. Four T-shaped block grooves are opened on the outer walls of both ends of the housing. The dustproof cover is sleeved on one end of the guide shaft. The outer wall of one end of the housing is slidably connected to the inside of the groove. Four protective shells are fixedly connected to the outer wall of the dustproof cover.
[0008] The outer walls of the four protective shells are all threaded with rotating threaded rods, the inner walls of the sleeves are provided with four first limiting block slots, and the interiors of the four first limiting block slots are slidably connected with limiting blocks. The outer walls at both ends of the shells are provided with four second limiting block slots, and two dustproof devices are respectively installed at both ends of the shells.
[0009] Preferably, the outer walls of the four T-blocks are slidably connected to the interior of the corresponding T-block grooves, the interiors of the four protective shells are respectively connected to the interior of the corresponding first limiting block grooves, and the ends of the four rotating threaded rods near the limiting blocks are threaded into the interior of the first limiting block grooves and are respectively rotatably connected to one end of the corresponding limiting blocks.
[0010] Among them, the ends of the four limiting blocks near the second limiting block groove all slide into the inside of the sleeve groove and respectively contact the inner wall of the corresponding second limiting block groove.
[0011] Preferably, the outer wall of the guide shaft is equipped with a plurality of balls, which are fitted together by a mounting ring, and sealing gaskets are fitted on both ends of the outer wall of the housing.
[0012] The two sealing gaskets are located inside the corresponding dust covers.
[0013] Preferably, the outer walls of the plurality of balls are in contact with the inner wall of the housing, and the outer walls of the two sealing gaskets are slidably connected to the mounting grooves at both ends of the housing;
[0014] The inner walls of the mounting slots at both ends of the outer shell are provided with four protrusion slots.
[0015] Preferably, the outer walls of the four protrusions on the outer walls of the two sealing gaskets are slidably connected to the interior of the corresponding protrusion grooves, and the interior of each of the eight protrusion grooves is provided with a fixing bolt groove;
[0016] The outer walls of the two sealing gaskets and the four protrusions are all threaded with fixing bolts.
[0017] Preferably, the ends of the eight fixing bolts near the fixing bolt slots are all threaded into the interior of the protrusion slots and respectively connected to the internal threads of the corresponding fixing bolt slots.
[0018] Compared with the prior art, the beneficial effects of this utility model are:
[0019] 1. This double-flange linear bearing, through the dust covers at both ends of the housing in the dustproof device, can effectively prevent external dust, impurities and contaminants from entering the housing, thereby increasing the service life and performance of the bearing. At the same time, it helps to maintain the lubricant inside the housing and prevent it from being lost or contaminated. Thus, the dust covers help maintain the stability and precision of the bearing and improve the operating efficiency of the entire mechanical system. Attached Figure Description
[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments:
[0021] Figure 1 This is a three-dimensional structural diagram of the present invention;
[0022] Figure 2 This is a schematic diagram of the external structure of the dust cover of this utility model;
[0023] Figure 3 This is a schematic diagram of the internal structure of the outer shell of this utility model;
[0024] Figure 4 This is a schematic diagram of the internal structure of the dust cover of this utility model.
[0025] Reference numerals in the attached drawings: 1. Outer shell; 2. Rotating threaded rod; 3. Protective shell; 4. Dust cover; 5. Guide shaft; 6. Fixing bolt; 7. T-block; 8. Limiting block; 9. First limiting block groove; 10. Sleeve groove; 11. Protrusion groove; 12. T-block groove; 13. Second limiting block groove; 14. Ball bearing; 15. Fixing bolt groove; 16. Sealing gasket. Detailed Implementation
[0026] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.
[0027] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0028] In the description of this utility model, terms such as greater than, less than, and exceeding are understood to exclude the stated number, while terms such as above, below, and within are understood to include the stated number. The use of terms like "first" and "second" is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the quantity or sequence of the indicated technical features.
[0029] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.
[0030] Please see Figure 1-4 This utility model provides a technical solution: a double-flange linear bearing, including a housing 1;
[0031] Dustproof devices are provided at both ends of the outer casing 1;
[0032] The dustproof device includes a dust cover 4 and a guide shaft 5. The guide shaft 5 is installed inside the outer casing 1. A groove 10 is formed on one side of the outer wall of the dust cover 4. Four T-shaped blocks 7 are fixedly connected to the inner wall of the groove 10. Four T-shaped block slots 12 are formed on the outer walls of both ends of the outer casing 1. The dust cover 4 is sleeved on one end of the guide shaft 5. The outer wall of one end of the outer casing 1 is slidably connected to the inside of the groove 10. The outer walls of the four T-shaped blocks 7 are slidably connected to the inside of the corresponding T-shaped block slots 12. Four protective shells 3 are fixedly connected to the outer wall of the dust cover 4. A rotating threaded rod 2 is threadedly connected to the outer wall of each of the four protective shells 3. Four T-shaped blocks 7 are fixedly connected to the inner wall of the groove 10. Each of the four first limiting block grooves 9 has a limiting block 8 slidably connected inside. Each of the two outer walls of the outer shell 1 has a second limiting block groove 13. The interior of each of the four protective shells 3 is connected to the interior of the corresponding first limiting block groove 9. The end of each of the four rotating threaded rods 2 near the limiting block 8 is threaded into the interior of the first limiting block groove 9 and is rotatably connected to the end of the corresponding limiting block 8. The end of each of the four limiting blocks 8 near the second limiting block groove 13 is slidably extended into the interior of the sleeve groove 10 and is in contact with the inner wall of the corresponding second limiting block groove 13. Two dustproof devices are respectively set at both ends of the outer shell 1.
[0033] The guide shaft 5 has multiple balls 14 mounted on its outer wall. The balls 14 are mounted together by mounting rings. Both ends of the outer wall of the housing 1 are fitted with sealing gaskets 16. The two sealing gaskets 16 are respectively inside the corresponding dust cover 4. The outer walls of the multiple balls 14 are in contact with the inner wall of the housing 1. The outer walls of the two sealing gaskets 16 are slidably connected to the inside of the mounting grooves at both ends of the housing 1. The inner walls of the mounting grooves at both ends of the housing 1 are provided with four protrusion grooves 11. The outer walls of the four protrusions of the two sealing gaskets 16 are slidably connected to the inside of the corresponding protrusion grooves 11. The inside of the eight protrusion grooves 11 is provided with fixing bolt grooves 15. The outer walls of the four protrusions of the two sealing gaskets 16 are threadedly connected with fixing bolts 6. The ends of the eight fixing bolts 6 near the fixing bolt grooves 15 are threaded into the inside of the protrusion grooves 11 and are respectively threadedly connected to the inside of the corresponding fixing bolt grooves 15.
[0034] Furthermore, when using this device, the bearing is installed in the designated position through the flanges at both ends of the housing 1. Then, during operation, the guide shaft 5 is tightly fitted with the shaft and moves linearly together with the shaft, causing the balls 14 to roll in contact between the inner and outer rings. This allows the inner ring to achieve smooth linear movement relative to the outer ring. At the same time, the dust covers 4 at both ends of the housing 1 can effectively prevent external dust, impurities, and contaminants from entering the interior of the housing 1, thereby increasing the service life and performance of the bearing. When it is necessary to remove the dust cover 4, the threaded rod 2 is turned to rotate and move it towards the limiting block 8, which in turn moves the limiting block 8. Then, the other end of the outer wall of the limiting block 8 is disengaged from the interior of the second limiting block groove 13. Then, the dust cover 4 can be removed from the housing 1 by pulling it. When it is necessary to remove the sealing gasket 16, the fixing bolt 6 is turned to rotate and disengage the other end of the outer wall from the interior of the fixing bolt groove 15. Then, the sealing gasket 16 can be removed from the housing 1 by pulling it.
[0035] The dust covers 4 at both ends of the housing 1 in the dustproof device can effectively prevent external dust, impurities and contaminants from entering the housing 1, thereby increasing the service life and performance of the bearing. At the same time, it helps to maintain the lubricant inside the housing 1 and prevent it from being lost or contaminated. Thus, the dust covers 4 help maintain the stability and precision of the bearing and improve the operating efficiency of the entire mechanical system.
[0036] Structural Description: Housing 1: Housing 1 is the main support structure of the bearing. It has flanges at both ends for installing and fixing the bearing. The flange design allows housing 1 to be easily connected to the mechanical structure, providing stable support and ensuring the accuracy and stability of the bearing in linear motion.
[0037] Rotating threaded rod 2: Rotating threaded rod 2 is located at one end of housing 1 and is used to control the disassembly of dust cover 4. Through threaded connection, precise displacement control can be achieved, which facilitates the disassembly and installation of dust cover 4.
[0038] Guide shaft 5: Guide shaft 5 fits tightly with the inner ring of the bearing and moves linearly together with the shaft. The tight fit ensures that there is no gap between the inner ring of the bearing and the guide shaft 5, realizing smooth linear motion and reducing vibration and noise.
[0039] Dust cover 4: Dust cover 4 is installed at both ends of housing 1 to prevent external dust, impurities and contaminants from entering the bearing. The effective sealing of dust cover 4 protects the internal components of the bearing, extends the service life of the bearing, and maintains its stable performance.
[0040] Limiting block 8: Limiting block 8 is connected to rotating threaded rod 2 and is used to control the disassembly of dust cover 4. The movement of limiting block 8 can precisely control the disassembly position of dust cover 4, making the disassembly process more convenient and faster.
[0041] Fixing bolt 6: Fixing bolt 6 is used to fix the sealing gasket 16. The bolt connection can ensure the stable fixation of the sealing gasket 16 and prevent it from shifting during movement.
[0042] Ball 14: The ball 14 is located between the inner ring and the outer ring. It is used to bear the load and realize rolling motion. The rolling contact of the ball 14 reduces the friction between the inner ring and the outer ring, realizes smooth linear motion, and improves the efficiency and life of the bearing.
[0043] Gasket 16: Gasket 16 is used to enhance the sealing performance of the bearing. The effective sealing of gasket 16 further prevents contaminants from entering the bearing, thereby improving the sealing performance and service life of the bearing.
[0044] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.
Claims
1. A double-flange linear bearing, comprising a housing (1), characterized in that: Dustproof devices are provided at both ends of the outer shell (1); The dustproof device includes a dustproof cover (4) and a guide shaft (5). The guide shaft (5) is installed inside the outer shell (1). A groove (10) is opened on one side of the outer wall of the dustproof cover (4). Four T-shaped blocks (7) are fixedly connected to the inner wall of the groove (10). Four T-shaped block grooves (12) are opened on the outer walls of both ends of the outer shell (1). The dustproof cover (4) is sleeved on one end of the guide shaft (5). One end of the outer wall of the outer shell (1) is slidably connected to the inside of the groove (10). Four protective shells (3) are fixedly connected to the outer wall of the dustproof cover (4). Among them, the outer walls of the four protective shells (3) are all threaded with rotating threaded rods (2), the inner wall of the sleeve groove (10) is provided with four first limiting block grooves (9), the interior of the four first limiting block grooves (9) is slidably connected with limiting blocks (8), the outer walls of both ends of the outer shell (1) are provided with four second limiting block grooves (13), and two dustproof devices are respectively set at both ends of the outer shell (1).
2. The double-flange linear bearing according to claim 1, characterized in that: The outer walls of the four T-blocks (7) are slidably connected to the interior of the corresponding T-block groove (12), the interiors of the four protective shells (3) are connected to the interior of the corresponding first limiting block groove (9), and the ends of the four rotating threaded rods (2) near the limiting block (8) are threaded to the interior of the first limiting block groove (9) and are rotatably connected to the end of the corresponding limiting block (8). Among them, the four limiting blocks (8) near the end of the second limiting block groove (13) all slide into the inside of the sleeve groove (10) and respectively contact the inner wall of the corresponding second limiting block groove (13).
3. A double-flange linear bearing according to claim 1, characterized in that: The outer wall of the guide shaft (5) is equipped with a plurality of balls (14), which are installed together by a mounting ring. Both ends of the outer wall of the outer shell (1) are fitted with sealing gaskets (16). The two sealing gaskets (16) are located inside the corresponding dust cover (4).
4. A double-flange linear bearing according to claim 3, characterized in that: The outer walls of the multiple balls (14) are in contact with the inner wall of the outer shell (1), and the outer walls of the two sealing gaskets (16) are slidably connected to the mounting grooves at both ends of the outer shell (1). The inner walls of the mounting slots at both ends of the outer shell (1) are provided with four protrusion slots (11).
5. A double-flange linear bearing according to claim 3, characterized in that: The outer walls of the two sealing gaskets (16) are slidably connected to the interior of the corresponding protrusion grooves (11), and the interior of each of the eight protrusion grooves (11) is provided with a fixing bolt groove (15). Among them, the outer walls of the four protrusions on the outer walls of the two sealing gaskets (16) are all threaded with fixing bolts (6).
6. A double-flange linear bearing according to claim 5, characterized in that: The ends of the eight fixing bolts (6) near the fixing bolt groove (15) are all threaded into the inside of the protrusion groove (11) and respectively connected to the internal threads of the corresponding fixing bolt groove (15).