Linear bearing capable of limiting stroke
By designing the sleeve and the movable shaft in the linear bearing, the shell and the external components are fixed, the balls are installed in the inner and outer side walls, and the axial movement range is adjusted using the stroke adjustment component, the problems of installation difficulty and inconvenient maintenance in the prior art are solved, and the stability and applicability are improved.
Patent Information
- Application Number
- CN202521194002.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-12
- Publication Date
- 2025-07-18
- Estimated Expiration
- 2035-06-12
AI Technical Summary
The existing linear bearings lack axial limiting function, which leads to increased installation difficulty and inconvenient maintenance.
A linear bearing is designed, with the sleeve fixed to the movable shaft, the shell fixed to the external parts, and the inner and outer side walls are provided with balls, and the upper and lower bottom of the shell is equipped with stroke adjustment components. The axial movement range is adjusted by adjusting the adjustment screws and limit rings, and the external limit parts are cancelled, and the axial limit is achieved by using balls.
It reduces installation difficulty, reduces workload, facilitates maintenance, improves the function and applicability of linear bearings, and ensures the stability and smoothness of bearings.
Smart Images
Figure CN223120417U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of bearings, in particular to a linear bearing capable of limiting stroke. Background Art
[0002] A linear bearing is a linear motion system that is used in conjunction with a cylindrical shaft. It is widely used in industrial fields such as precision machine tools, textile machinery, food packaging machinery, and printing machinery.
[0003] In the actual use of the linear bearing and the shaft, in most scenarios, the relative movement range of the two is limited, that is, the relative displacement range between the linear bearing and the shaft is limited (either the shaft is limited, or the component fixedly connected to the linear bearing is limited).
[0004] However, since the existing linear bearing does not have an axial limiting function, users need to install limiting parts such as limiting rings or end caps by themselves to limit the shaft or the component fixedly connected to the linear bearing in the linear direction. However, this method increases the installation difficulty and workload, and is not conducive to the maintenance and repair of the entire device. Content of the Utility Model
[0005] In view of the above deficiencies of the prior art, the utility model provides a linear bearing capable of limiting stroke. The sleeve is fixed to the movable shaft, the housing is fixed to the external component, and multiple groups of balls are arranged between the inner side wall of the housing and the outer side wall of the sleeve. Each group of balls is evenly arranged along the axis direction of the sleeve. The housing can axially move relative to the sleeve through the balls. Stroke adjustment components are respectively arranged on the upper and lower bottoms of the housing, which can limit the relative movement range between the sleeve and the housing in the axial direction. There is no need to add limiting parts outside the movable shaft or the housing, which reduces the installation difficulty and workload, facilitates the maintenance and repair of the entire device, and at the same time upgrades and transforms the linear bearing, increases the functions of the linear bearing, and improves the practicality.
[0006] To achieve the above object, the present utility model is realized by the following technical solutions: A linear bearing capable of limiting the stroke, the linear bearing is installed between the movable shaft and the external component, the linear bearing includes a cylindrical shell, a sleeve with a length and diameter smaller than that of the shell, and multiple groups of balls. The shell is provided with a cylindrical cavity, the sleeve is arranged in the cavity, multiple second chutes are uniformly opened on the outer side wall of the sleeve in the same direction as its axis, multiple groups of balls are correspondingly arranged in the second chutes, and multiple groups of balls are respectively in contact with the inner side wall of the shell and the inner wall of the second chute of the sleeve. Through holes with an inner diameter larger than the diameter of the movable shaft are opened at the central positions of the upper and lower bottoms of the shell, the outer diameter of the sleeve is larger than the inner diameter of the through hole, the movable shaft passes through the through holes at the upper and lower bottoms of the shell and is fixedly connected to the inner ring of the sleeve, and the shell is fixedly connected to the external component; Stroke adjustment components are arranged on the upper and lower bottoms of the shell, and the stroke adjustment components can adjust the axial relative movement range between the movable shaft and the shell.
[0007] Preferably, the stroke adjustment component includes two pairs of adjustment screws and a pair of limit rings. A pair of threaded holes are respectively opened on the upper and lower bottoms of the shell, the two pairs of adjustment screws are respectively screwed into the threaded holes, and the ends of the two pairs of adjustment screws corresponding to the inner side of the cavity of the shell are respectively rotatably connected to the surface of the limit ring. A handle is arranged at the outer end of each adjustment screw. The inner diameter of the limit ring is larger than the diameter of the movable shaft, and the axis of the limit ring is the same as that of the sleeve.
[0008] Preferably, multiple first chutes are uniformly opened on the inner side wall of the shell in the same direction as its axis, and multiple groups of balls are arranged between the first chutes and the second chutes.
[0009] Preferably, a fixing plate is arranged at the upper end or the lower end of the sleeve, the edge of the fixing plate can block one end of the second chute, and the fixing plate is fixedly connected to the end face of the sleeve by screws; A cover is arranged on the upper bottom or the lower bottom of the shell, a first fixing ring is fixedly sleeved on the side surface of the cover, a second fixing ring is fixedly sleeved on the side surface of the shell close to the cover, and the first fixing ring and the second fixing ring are detachably connected by a plurality of fixing bolts.
[0010] Preferably, the second chute on the outer side wall of the sleeve is designed as a spherical chute with a three-quarter spherical cross-section, multiple groups of balls are respectively arranged in the corresponding spherical chutes, and the surface of the balls protruding from the spherical chutes is in contact with the inner side wall of the shell.
[0011] The present utility model provides a linear bearing capable of limiting the stroke, and has the following beneficial effects:
[0012] 1. The utility model has a sleeve fixed to a movable shaft, a housing fixed to an external component, a plurality of groups of balls arranged between an inner wall of the housing and an outer wall of the sleeve, each group of balls evenly arranged along the axial direction of the sleeve, the housing can move axially relative to the sleeve through the balls, and the upper and lower bottoms of the housing are respectively provided with stroke adjustment components, which can limit the relative movement range of the sleeve and the housing in the axial direction, and there is no need to add a stopper outside the movable shaft or the housing, which reduces the difficulty of installation and the workload, and is convenient for the repair and maintenance of the entire device. At the same time, the linear bearing is upgraded and reconstructed, the function of the linear bearing is increased, and the practicality is improved;
[0013] 2. The stroke adjustment assembly of the utility model includes two pairs of adjusting screws and a pair of limiting rings. The limiting rings can be moved axially by adjusting the screws to change the distance between the two limiting rings, thereby changing the axial movement range of the sleeve, thereby changing the relative movement range of the movable shaft and the housing, improving the applicability of the linear bearing, and the adjustment method is simple and easy to operate;
[0014] 3. The utility model sets a plurality of first slide grooves arranged evenly along the axial direction on the inner side wall of the housing, and a plurality of groups of balls are set between the corresponding first slide grooves and second slide grooves, so as to limit the sleeve to move only in the axial direction thereof, and is applied to the work under the condition that only linear movement is required;
[0015] 4. The second slide groove on the outer side wall of the sleeve of the utility model is designed as a spherical slide groove with a three-quarter spherical cross-section, which makes each group of balls more stable and ensures the working stability of the linear bearing. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 This is a front cross-sectional view of a linear bearing with limited stroke according to the utility model.
[0017] Figure 2 This is a front cross-sectional view of the housing of the utility model after the first sliding groove is opened.
[0018] Figure 3 This is a front cross-sectional view of the utility model after the fixing plate and the cover are installed.
[0019] Figure 4 This is the main cross-sectional view after the spherical annular groove is designed for the utility model.
[0020] In the figure: 1. adjusting screw; 2. threaded hole; 3. limiting ring; 4. first slide groove; 5. ball; 6. sleeve; 7. second slide groove; 8. shell; 9. cavity; 10. through opening; 11. movable shaft; 12. cover; 13. first fixing ring; 14. second fixing ring; 15. fixing bolt; 16. fixing plate; 17. spherical slide groove. DETAILED DESCRIPTION
[0021] Next, in conjunction with the accompanying drawings in the embodiments of the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.
[0022] As Figures 1-4 shown, a linear bearing capable of limiting the stroke, the linear bearing is installed between the movable shaft 11 and an external component. The linear bearing includes a housing 8 with a cylindrical shape, a sleeve 6 whose length and diameter are both smaller than that of the housing 8, and multiple groups of balls 5. The housing 8 is provided with a cylindrical cavity 9. The sleeve 6 is arranged in the cavity 9. Multiple second chutes 7 in the same direction as its axis are evenly formed on the outer side wall of the sleeve 6. Multiple groups of balls 5 are correspondingly arranged in the second chutes 7, and multiple groups of balls 5 are respectively in contact with the inner side wall of the housing 8 and the inner wall of the second chute 7 of the sleeve 6. Through holes 10 with an inner diameter larger than the diameter of the movable shaft 11 are formed at the central positions of the upper and lower bottoms of the housing 8. The outer diameter of the sleeve 6 is larger than the inner diameter of the through hole 10. The movable shaft 11 passes through the through holes 10 at the upper and lower bottoms of the housing 8 and is fixedly connected to the inner ring of the sleeve 6. The housing 8 is fixedly connected to the external component; stroke adjustment components are arranged on the upper and lower bottoms of the housing 8, and the stroke adjustment components can adjust the axial relative movement range between the movable shaft 11 and the housing 8; the stroke adjustment components include two pairs of adjustment screws 1 and a pair of limit rings 3. A pair of threaded holes 2 are respectively formed on the upper and lower bottoms of the housing 8. The two pairs of adjustment screws 1 are respectively screwed into the threaded holes 2. The ends of the two pairs of adjustment screws 1 corresponding to the inner side of the cavity 9 of the housing 8 are respectively rotatably connected to the surface of the limit ring 3. A handle is arranged at the outer end of each adjustment screw 1. The inner diameter of the limit ring 3 is larger than the diameter of the movable shaft 11, and the limit ring 3 has the same axis as the sleeve 6; multiple first chutes 4 in the same direction as its axis are evenly formed on the inner side wall of the housing 8. Multiple groups of balls 5 are arranged between the first chutes 4 and the second chutes 7; a fixing plate 16 is arranged at the upper end or the lower end of the sleeve 6. The edge of the fixing plate 16 can block one end of the second chute 7. The fixing plate 16 is fixedly connected to the end face of the sleeve 6 by screws; a cover 12 is arranged on the upper bottom or the lower bottom of the housing 8. A first fixing ring 13 is fixedly sleeved on the side surface of the cover 12. A second fixing ring 14 is fixedly sleeved on the side surface of the housing 8 close to the cover 12. The first fixing ring 13 and the second fixing ring 14 are detachably connected by a plurality of fixing bolts 15; the second chute 7 on the outer side wall of the sleeve 6 is designed as a spherical chute 17 with a three-quarter spherical cross-section. Multiple groups of balls 5 are respectively arranged in the corresponding spherical chutes 17. The surface of the balls 5 protruding from the spherical chute 17 is in contact with the inner side wall of the housing 8.
[0023] The detailed connection means are well-known technologies in the art. The following mainly introduces the working principle and process, which are as follows:
[0024] In the present utility model, the sleeve 6 and the movable shaft 11 are fixedly connected. Interference fit or other end fasteners can be used for fixation, and existing technologies can be adopted as long as the sleeve 6 and the movable shaft 11 are ensured not to move axially relative to each other; the housing is fixed to external components, which depends on the specific working requirements and can be understood by those skilled in the art. According to the attached Figure 1 specification, it can be known that the sleeve 6 with a length and diameter smaller than those of the housing 8 in the present utility model is arranged in the cavity 9 of the housing 8. Since a plurality of second chutes 7 in the same direction as the axis of the sleeve 6 are evenly arranged on the outer side wall of the sleeve 6, a plurality of groups of balls 5 are correspondingly arranged between the second chutes 7 and the side wall of the housing 8, and the plurality of groups of balls 5 are respectively in contact with the inner side wall of the housing 8 and the inner wall of the second chute 7 of the sleeve 6. Therefore, it is ensured that the axis lines of the sleeve 6 and the housing 8 are the same, and the sleeve 6 can rotate and move in the axial direction in the housing 8 through the balls 5. Here, the axial movement is mainly studied. Since through holes 10 with an inner diameter smaller than the outer diameter of the sleeve 6 are provided on the upper and lower bottoms of the housing 8, and the movable shaft 11 passes through the through holes 10 and is fixedly connected with the sleeve 6 at the same time, the movable shaft 11 can move in the axial direction relative to the housing 8 through the balls 5, playing the role of a bearing. And the sleeve 6 can only move axially in the cavity 9 of the housing 8, that is, the movement in the axial direction is limited by the upper and lower bottoms of the housing 8, thereby limiting the stroke of the movable shaft 11 moving in the axial direction. There is no need to add limit parts outside the movable shaft 11 or outside the housing 8, reducing the installation difficulty and workload, facilitating the maintenance of the whole device. Moreover, stroke adjustment components are provided on the upper and lower bottoms of the housing 8, and the stroke adjustment components can adjust the axial relative movement range between the movable shaft 11 and the housing 8. The present utility model upgrades and reforms the linear bearing body, increases the functions of the linear bearing, and improves the practicability.
[0025] Among them, the stroke adjustment component includes two pairs of adjustment screws 1 and a pair of limit rings 3. A pair of threaded holes 2 are respectively opened on the upper and lower bottoms of the housing 8. The two pairs of adjustment screws 1 are respectively screwed into the threaded holes 2. The ends of the two pairs of adjustment screws 1 corresponding to the inside of the cavity 9 of the housing 8 are respectively rotatably connected to the surface of the limit ring 3. A handle is provided at the outer end of each adjustment screw 1. The inner diameter of the limit ring 3 is larger than the diameter of the movable shaft 11, and the axis line of the limit ring 3 is the same as that of the sleeve 6. Before work: By turning the handle, the position of the adjustment screw 1 is adjusted, so that the limit ring 3 moves in the axial direction of the housing 8, changing the distance between the two limit rings 3, and further changing the axial movement range of the sleeve 6, achieving the purpose of adjusting the stroke range between the movable shaft 11 and the housing 8, improving the applicability of the linear bearing. The adjustment method is simple and easy to operate.
[0026] Among them, as Figure 2As shown, a plurality of first sliding grooves 4 in the same direction as the axis thereof are evenly formed in the inner side wall of the housing 8. A plurality of sets of balls 5 are arranged between the first sliding grooves 4 and the second sliding grooves 7. In this way, the rolling direction of the balls 5 is limited, so that the sleeve 6 and the movable shaft 11 connected to the sleeve 6 can only move vertically in the axial direction and will not rotate, which is applied to the work that only requires linear movement.
[0027] Among them, as Figure 3 shown, a fixing plate 16 is provided at the upper end or the lower end of the sleeve 6. The edge of the fixing plate 16 can block one end of the second sliding groove 7. The fixing plate 16 is fixedly connected to the end face of the sleeve 6 by screws; a cover 12 is provided on the upper bottom or the lower bottom of the housing 8. A first fixing ring 13 is fixedly sleeved on the side surface of the cover 12. A second fixing ring 14 is fixedly sleeved on the side surface of the housing 8 near the cover 12. The first fixing ring 13 and the second fixing ring 14 are detachably connected by a plurality of fixing bolts 15. This method is a possible installation method of a linear bearing. Of course, the installation method of the present invention is not limited to this one.
[0028] Among them, as Figure 4 shown, the second sliding groove 7 on the outer side wall of the sleeve 6 is designed as a spherical sliding groove 17 with a three-quarter spherical cross-section. A plurality of sets of balls 5 are respectively arranged in the corresponding spherical sliding grooves 17. The surface of the balls 5 protruding from the spherical sliding grooves 17 abuts against the inner side wall of the housing 8. During operation, the balls 5 roll more smoothly, reducing friction, improving the overall smoothness of the linear bearing, and ensuring the stability of the operation of the linear bearing.
[0029] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A linear bearing capable of limiting the stroke, the linear bearing being installed between a movable shaft (11) and an external component, characterized in that, The linear bearing includes a housing (8) with a cylindrical shape, a sleeve (6) whose length and diameter are both smaller than those of the housing (8), and multiple groups of balls (5). The housing (8) is provided with a cylindrical cavity (9). The sleeve (6) is arranged in the cavity (9). A plurality of second chutes (7) having the same direction as the axis of the sleeve (6) are evenly formed on the outer sidewall of the sleeve (6). Multiple groups of balls (5) are correspondingly arranged in the second chutes (7), and the multiple groups of balls (5) are respectively in contact with the inner sidewall of the housing (8) and the inner wall of the second chute (7) of the sleeve (6). Openings (10) with an inner diameter larger than the diameter of the movable shaft (11) are formed at the center positions of the upper and lower bottoms of the housing (8). The outer diameter of the sleeve (6) is larger than the inner diameter of the opening (10). The movable shaft (11) passes through the openings (10) at the upper and lower bottoms of the housing (8) and is fixedly connected to the inner ring of the sleeve (6). The housing (8) is fixedly connected to an external component; Travel adjustment components are arranged on the upper and lower bottoms of the housing (8), and the travel adjustment components can adjust the axial relative movement range between the movable shaft (11) and the housing (8).
2. The linear bearing capable of limiting stroke according to claim 1, wherein, The travel adjustment components include two pairs of adjusting screws (1) and a pair of limit rings (3). A pair of threaded holes (2) are respectively formed on the upper and lower bottoms of the housing (8). The two pairs of adjusting screws (1) are respectively screwed into the threaded holes (2). The ends of the two pairs of adjusting screws (1) corresponding to the inner side of the cavity (9) of the housing (8) are respectively rotatably connected to the surfaces of the limit rings (3). A handle is arranged at the outer end of each adjusting screw (1). The inner diameter of the limit ring (3) is larger than the diameter of the movable shaft (11), and the limit ring (3) has the same axis as the sleeve (6).
3. A linear bearing capable of limiting stroke according to claim 1, characterized in that, A plurality of first chutes (4) having the same direction as the axis of the housing (8) are evenly formed on the inner sidewall of the housing (8). Multiple groups of balls (5) are arranged between the first chutes (4) and the second chutes (7).
4. A linear bearing capable of limiting stroke according to claim 1, wherein, A fixing plate (16) is arranged at the upper end or the lower end of the sleeve (6). The edge of the fixing plate (16) can block one end of the second chute (7). The fixing plate (16) is fixedly connected to the end face of the sleeve (6) by screws; A cover (12) is arranged on the upper bottom or the lower bottom of the housing (8). A first fixing ring (13) is fixedly sleeved on the side surface of the cover (12). A second fixing ring (14) is fixedly sleeved on the side surface of the housing (8) close to the cover (12). The first fixing ring (13) and the second fixing ring (14) are detachably connected by a plurality of fixing bolts (15).
5. A linear bearing capable of limiting stroke according to claim 1, characterized in that, The second chute (7) on the outer sidewall of the sleeve (6) is designed as a spherical chute (17) with a three-quarter spherical cross-section. Multiple groups of balls (5) are respectively arranged in the corresponding spherical chutes (17). The surfaces of the balls (5) protruding from the spherical chutes (17) are in contact with the inner sidewall of the housing (8).