X-shaped linear bearing
By using the double-layer structure design of the X-type linear bearing and the spring adjustment of the bearing assembly, the problems of increased friction and non-adjustable clearance in existing linear bearings under heavy loads have been solved, achieving high-precision, low-friction linear motion and long service life.
Patent Information
- Application Number
- CN202520538812.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-26
- Publication Date
- 2025-12-23
- Estimated Expiration
- 2035-03-26
AI Technical Summary
When existing linear bearings reciprocate relative to the guide rail, the thrust deviates from the bearing center, resulting in increased motion resistance, making it difficult to push and unsuitable for bearing heavy loads. After use, the gap between the bearing and the guide rail cannot be repaired.
The guide rail assembly adopts a double-layer structure design, combining an X-shaped guide rail with a high-strength round steel guide rail, which is tightly connected by tapered screws. The upper and lower bearings in the bearing assembly fit against the inner side of the guide rail, and the gap is adjusted by springs and adjusting screws to achieve high-precision sliding support.
It improves the rigidity and stability of the guide rail, reduces friction, enhances load-bearing capacity, achieves precise linear motion, extends service life, and adjusts the gap to maintain optimal fit.
Smart Images
Figure CN223708309U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to bearing technical field especially relates to a X type linear bearing. BACKGROUND
[0002] Linear bearing is a kind of linear motion system, for with the cylindrical shaft cooperation, through the point contact of bearing ball and bearing housing to realize low friction, high-precision smooth linear motion.
[0003] However, the current market existing linear bearing type, such as inline steel ball rotary bearing, when guide rail or linear bearing carries out relative reciprocating motion, will face the problem of thrust deviation from bearing center, thereby leading to the increase of movement resistance, difficult to push, in addition, this kind of bearing is not suitable for carrying heavy load, and after a period of use, gap will appear between bearing and guide rail, and this gap is usually irreparable. UTILITY MODEL CONTENTS
[0004] The utility model is provided with X type linear bearing to solve the problems in the above background.
[0005] To realize the above-mentioned purpose, the utility model provides the following technical scheme: it includes base, is provided with guide rail assembly on the base, is provided with bearing assembly on the guide rail assembly.
[0006] As preferred in the utility model, the guide rail assembly includes X type guide rail arranged on the base, a pair of round steel guide rails are symmetrically arranged on the upper and lower sides in the X type guide rail, a plurality of taper screws are arranged in the middle of the X type guide rail, the plurality of taper screws are located between the round steel guide rails, a pair of upper inner side faces and a pair of lower inner side faces are symmetrically arranged on the two sides of the X type guide rail.
[0007] As preferred in the utility model, the bearing assembly includes a pair of upper housings, a pair of lower housings are symmetrically arranged between the two upper housings, a large end plate is arranged on the side away from the lower housing of the two upper housings, a pair of connecting pins are inserted and arranged between the two large end plates, a screw one is arranged between the connecting pin and the large end plate.
[0008] As preferred in the utility model, a pair of upper retainer rings are arranged in the two upper housings, a pair of upper bearing pins are arranged in each pair of upper retainer rings, an upper bearing one is arranged on each upper bearing pin, a plurality of upper bearing ones are in close contact with the upper inner side face of the X type guide rail, and a screw two is arranged between the upper housing and the upper retainer ring.
[0009] As the utility model is preferred, two lower housings are provided with lower retainer frames, each lower retainer frame is provided with a pair of lower bearing pins, each lower bearing pin is provided with a lower bearing one, the lower bearing ones are in close contact with the lower inner side surfaces of the X-shaped guide rails, springs are arranged between the lower housings and the lower retainer frames, and the lower retainer frames are provided with adjusting screws away from the springs.
[0010] Compared with the prior art, the above technical scheme of the utility model has the following beneficial technical effects:
[0011] 1. The utility model discloses a guide rail assembly with a double-layer structure, wherein the outer layer is an X-shaped guide rail made of sectional material, and the inner layer is a round steel guide rail with high strength, high precision and high straightness, and the two are tightly combined into one through taper screws, thereby enhancing the rigidity and stability of the guide rail, improving the carrying capacity and running precision, and enabling the guide rail assembly to maintain excellent performance under heavy load.
[0012] 2. The utility model discloses a bearing assembly, wherein the upper bearing one and the lower bearing one are in close contact with the upper inner side surface and the lower inner side surface of the X-shaped guide rail respectively to provide sliding support, reduce friction and improve running precision. In addition, the spring and the adjusting screw are used in combination. When the gap needs to be tightened, the user can rotate the adjusting screws on the lower housings on both sides to move the lower retainer frames on both sides along the normal direction of the lower inner side surface of the X-shaped guide rail, thereby tightening the gap between the bearing assembly and the X-shaped guide rail until the required tightness is achieved. When the gap needs to be loosened, the user can loosen the adjusting screws, and the spring force will cause the lower retainer frames to move away along the normal direction of the lower inner side surface, thereby increasing the gap and achieving quick adjustment of the gap between the bearing assembly and the guide rail assembly. This enables the linear bearing to maintain the best fit during operation, thereby reducing friction and wear, improving the service life and running precision of the linear bearing. BRIEF DESCRIPTION OF DRAWINGS
[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0014] Figure 2 It is a schematic diagram of the guide rail assembly structure of the utility model;
[0015] Figure 3 It is a schematic diagram of the bearing assembly structure of the utility model;
[0016] Figure 4 It is a schematic diagram of the upper retainer frame structure in the bearing assembly of the utility model;
[0017] Figure 5 It is a schematic diagram of the lower bearing one structure in the bearing assembly of the utility model;
[0018] Figure 6The lower retainer structure schematic view in the bearing assembly of the utility model shows that
[0019] Figure 7 The lower bearing pin structure schematic view in the bearing assembly of the utility model shows that
[0020] Figure 8 The spring and adjusting screw structure schematic view in the bearing assembly of the utility model shows that
[0021] The drawing mark: base 1, guide rail assembly 2, X type guide rail 21, round steel guide rail 22, taper screw 23, upper inner side surface 24, lower inner side surface 25, bearing assembly 3, upper outer shell 31, lower outer shell 32, large end plate 33, connecting pin 34, screw one 35, upper retainer 36, upper bearing pin 37, upper bearing one 38, screw two 39, lower retainer 310, lower bearing pin 311, lower bearing one 312, spring 313, adjusting screw 314. DETAILED DESCRIPTION
[0022] In order to make the purpose, technical scheme and advantages of the utility model more clear and obvious, the utility model is further explained in detail below in combination with specific implementation manners and with reference to the drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the utility model. In addition, in the following description, the description of the known structure and technology is omitted to avoid unnecessary confusion of the concept of the utility model.
[0023] As Figures 1-8 shown, the utility model provides a kind of X type linear bearing, it includes base 1, guide rail assembly 2 is arranged on base 1, bearing assembly 3 is arranged on guide rail assembly 2.
[0024] Guide rail assembly 2 includes X type guide rail 21 arranged on base 1, a pair of round steel guide rails 22 are symmetrically arranged in X type guide rail 21 upper and lower sides, a plurality of taper screws 23 are arranged in the middle of X type guide rail 21, a plurality of taper screws 23 are located between round steel guide rail 22, guide rail assembly 2 adopts double-layer structure, outside is the X type guide rail 21 of sectional material, inside is the two round steel guide rails 22 of high strength, high precision and high straightness, again locked using taper screw 23, taper screw 23 bevel surface and the surface of two round steel guide rails 22 contact, and expand towards upper and lower directions, so that X type guide rail 21 and round steel guide rail 22 are tightly combined into an entity, constitute the high-strength high-precision linear guide rail of double-layer structure, X type guide rail 21 two sides symmetrically set a pair of upper inner side surface 24 and a pair of lower inner side surface 25.
[0025] The bearing assembly 3 comprises a pair of upper housings 31, which provide mounting bases for upper retainers 36, and a pair of lower housings 32 symmetrically arranged between the two upper housings 31 and providing mounting bases for lower retainers 310. The two upper housings 31 are each provided with a large end plate 33 on the side away from the lower housings 32, and a pair of connecting pins 34 are inserted through both sides of the two large end plates 33. Screws I 35 are arranged between the connecting pins 34 and the large end plates 33. The combination of the large end plates 33, the connecting pins 34, and the screws I 35 locks the entire bearing assembly 3 together, ensuring the integrity and stability of the bearing assembly 3.
[0026] A pair of upper retainers 36 are arranged in each of the two upper housings 31, which provide mounting bases for upper bearing pins 37 and upper bearings I 38. A pair of upper bearing pins 37 are arranged in each pair of upper retainers 36, which provide mounting bases for upper bearings I 38. An upper bearing I 38 is arranged on each upper bearing pin 37. The plurality of upper bearings I 38 are in contact with the upper inner side 24 of the X-shaped guide rail 21. The upper bearings I 38 are in contact with the upper inner side 24 of the X-shaped guide rail 21, providing sliding support, reducing friction, and improving running accuracy. Screws II 39 are arranged between the upper housings 31 and the upper retainers 36, fixing the upper housings 31 and the upper retainers 36, and ensuring the stability of the bearing assembly 3.
[0027] A lower retainer 310 is arranged in each of the two lower housings 32, which provides mounting bases for a lower bearing pin 311 and a lower bearing I 312. A pair of lower bearing pins 311 are arranged in each lower retainer 310, which provide mounting bases for lower bearings I 312. A lower bearing I 312 is arranged on each lower bearing pin 311. The plurality of lower bearings I 312 are in contact with the lower inner side 25 of the X-shaped guide rail 21. The lower bearings I 312 are in contact with the lower inner side 25 of the X-shaped guide rail 21, providing sliding support, reducing friction, and improving running accuracy. Springs 313 are arranged between the lower housings 32 and the lower retainers 310, providing elastic force to allow the lower retainers 310 to move away from the normal direction of the lower inner side 25 when the adjustment screws 314 are loosened, thereby adjusting the gap between the bearing assembly 3 and the guide rail assembly 2. The lower retainers 310 are provided with adjustment screws 314 on the side away from the springs 313. By rotating the adjustment screws 314 on the left and right sides of the lower housings 32, the lower retainers 310 on both sides are moved along the normal direction of the lower inner side 25 of the X-shaped guide rail 21, thereby tightening the gap between the entire bearing assembly 3 and the X-shaped guide rail 21 until the desired tightness is achieved.
[0028] In use, the user first fixes the base 1 in a preset position, then, according to actual conditions, adjusts the gap between the bearing assembly 3 and the guide rail assembly 2 by rotating the adjusting screw 314, when it is needed to tighten the gap, the user can rotate the adjusting screw 314 on the lower outer shell 32 of the left and right sides, so that the lower retainer 310 of the two sides moves along the normal direction of the lower inner side surface 25 of the X-shaped guide rail 21, thereby tightening the gap of the entire bearing assembly 3 and the X-shaped guide rail 21, until the required tightness is reached, when it is needed to loosen the gap, the user can loosen the adjusting screw 314, the elastic force of the spring 313 will make the lower retainer 310 move away along the normal direction of the lower inner side surface 25, thereby increasing the gap, after adjustment, the user can install the component that needs to slide on the bearing assembly 3, and realizes the accurate straight line movement through the sliding of the bearing assembly 3 on the guide rail assembly 2.
[0029] It should be understood that the above specific embodiments of the present application are only used for illustrative or explanatory purposes of the principles of the present application, and do not constitute a limitation of the present application. Therefore, any modification, equivalent replacement, improvement, etc. made without departing from the spirit and scope of the present application shall be included in the protection scope of the present application. In addition, the appended claims of the present application are intended to cover all changes and modifications falling within the scope and boundary of the appended claims, or the equivalent forms of such scope and boundary.
Claims
1. An X-type linear bearing, comprising: The base (1) is characterized in that: a guide rail assembly (2) is provided on the base (1), and a bearing assembly (3) is provided on the guide rail assembly (2); The guide rail assembly (2) includes an X-shaped guide rail (21) mounted on a base (1). A pair of round steel guide rails (22) are symmetrically arranged on the upper and lower sides of the X-shaped guide rail (21). Several tapered screws (23) are arranged in the middle of the X-shaped guide rail (21). The tapered screws (23) are located between the round steel guide rails (22). A pair of upper inner surfaces (24) and a pair of lower inner surfaces (25) are symmetrically arranged on both sides of the X-shaped guide rail (21). The bearing assembly (3) includes a pair of upper housings (31), and a pair of lower housings (32) are symmetrically arranged on both sides between the two upper housings (31). A large end plate (33) is provided on the side of the two upper housings (31) away from the lower housings (32). A pair of connecting pins (34) are inserted through both sides between the two large end plates (33). A screw (35) is provided between the connecting pin (34) and the large end plate (33).
2. The X-type linear bearing according to claim 1, characterized in that: Each of the two upper housings (31) is provided with a pair of upper retainers (36), each pair of upper retainers (36) is provided with a pair of upper bearing pins (37), each upper bearing pin (37) is provided with an upper bearing (38), and several upper bearings (38) are in contact with the upper inner side (24) of the X-shaped guide rail (21). A screw (39) is provided between the upper housing (31) and the upper retainer (36).
3. An X-type linear bearing according to claim 2, characterized in that: Both lower housings (32) are provided with a lower retainer (310), each lower retainer (310) is provided with a pair of lower bearing pins (311), each lower bearing pin (311) is provided with a lower bearing (312), and several lower bearings (312) are in contact with the lower inner side (25) of the X-shaped guide rail (21). A spring (313) is provided between the lower housing (32) and the lower retainer (310), and an adjusting screw (314) is provided on the side of the lower retainer (310) away from the spring (313).