Linear guide rail with cross-flow rollers
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGMEN TIANGONG AUTOMATION TECH CO LTD
- Filing Date
- 2025-07-29
- Publication Date
- 2026-08-07
AI Technical Summary
但是现有技术中使用的为钢珠，钢珠的抗偏载能力差和刚性不足
本实用新型的交叉滚子组正交交叉排列，使导轨可同时承受径向、轴向及倾覆力矩载荷，提高承载能力和刚性；交叉滚子组、滚子沟道杆和滚子沟道移动座的组合显著降低接触应力，降低弹性变形量，确保重复定位精度，滚子沟道移动座封闭式设计，避免粉尘侵入，提高导轨使用寿命。
Smart Images
Figure CN224606836U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of guide rails, and in particular to a linear guide rail with cross-flow rollers. Background Technology
[0002] Existing technology includes a steel ball circulating rolling mechanism, comprising a fixed component, a moving component, and a plurality of rolling steel balls. These rolling steel balls are categorized as load-bearing balls, reverse-flowing balls, and return-flowing balls based on their different positions. The fixed component has a U-groove structure, with fixed load-bearing raceways on both sides of the inner wall of the U-groove. The moving component includes a slider, a reverser, and a return ball tube. However, the existing technology uses steel balls, which have poor resistance to eccentric loads and insufficient rigidity. Utility Model Content
[0003] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a linear guide rail with cross-flow rollers.
[0004] The objective of this utility model is achieved through the following technical solution: A linear guide rail with cross-flow rollers includes a flat cover plate, a module moving seat, a flat moving part, a roller groove rod, a roller groove moving seat, a stator assembly, a track base, and a cross roller assembly. The cross roller assembly includes a first roller and a second roller, which are perpendicular to each other to form the cross roller assembly. The roller groove moving seat is provided with a ball return channel, and the cross roller assembly is slidably disposed in the ball return channel. The roller groove moving seat and the roller groove rod form a moving channel, and the cross roller assembly is installed in the ball return channel and the moving channel. The roller groove rod and the stator assembly are both installed on the track base. The roller groove moving seat and the flat moving part are both connected to the module moving seat. The flat moving part extends into the track base and corresponds to the stator assembly. The flat cover plate is connected to the track base and matches the module moving seat.
[0005] A better option is that the roller groove moving seat includes a first crossed roller reverser, a crossed roller return tube, and a roller groove moving rod. The first crossed roller reverser is connected to both ends of the crossed roller return tube to form a return channel. The two ends of the return channel are connected to the roller groove moving rod. The roller groove moving rod and the roller groove rod form a moving channel. The first crossed roller reverser and the roller groove moving rod are both installed on the module moving seat.
[0006] A better option is that the roller channel moving rod is provided with a cross roller hook groove, the cross roller hook groove is provided with a first side and a second side, the first side and the second side are perpendicular to each other, the axial direction of the first roller is perpendicular to the first side, and the axial direction of the second roller is perpendicular to the second side.
[0007] A better option is that the cross roller return tube includes a connecting part and a tube body. The two ends of the tube body are respectively connected to the first cross roller reverser through the connecting part. The tube body is provided with a return ball through hole. The cross ball through hole has a square cross section. The cross roller assembly is slidably connected to the return ball through hole.
[0008] A better option is that the roller groove moving seat includes a second cross roller reverser and a roller guide groove block, the roller guide groove block being connected to the module moving seat.
[0009] A better option is that the second cross roller reverser is provided with a U-shaped right-angle V-groove, which together with the roller guide channel block forms a ball return channel.
[0010] A better option is that the roller guide channel block is provided with a ball return groove and a moving groove. The ball return groove and the second cross roller reverser form a ball return channel, and the moving groove and the roller channel rod form a moving channel.
[0011] A better option is that the stator assembly includes multiple flat stators arranged linearly and connected together. The multiple flat stators are installed in the track base, and each of the multiple flat stators corresponds to the flat moving part.
[0012] A better option is that the track base includes a cross roller guide base and an end cap, the lower end of the end cap being connected to both ends of the cross roller guide base, and the upper end of the end cap being connected to both ends of the flat cover plate.
[0013] This utility model has the following advantages and beneficial effects compared to the prior art: The orthogonal cross roller assembly of this invention allows the guide rail to simultaneously withstand radial, axial, and overturning moment loads, improving load-bearing capacity and rigidity. The combination of the cross roller assembly, roller groove rod, and roller groove moving seat significantly reduces contact stress and elastic deformation, ensuring repeatability and positioning accuracy. The enclosed design of the roller groove moving seat prevents dust intrusion and extends the service life of the guide rail. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of a linear guide rail with cross-flow rollers according to the present invention (Embodiment 1); Figure 2 This is a side view of a linear guide rail with cross-flow rollers according to the present invention (Embodiment 1); Figure 3 yes Figure 2 Sectional view at point A; Figure 4This is an exploded view of a linear guide rail with cross-flow rollers according to the present invention (Embodiment 1); Figure 5 This is an assembly diagram of the roller groove moving seat and the cross roller assembly of a linear guide rail with cross-flow rollers (Example 1) according to this utility model. Figure 6 yes Figure 5 A magnified view of the area at point B; Figure 7 This is a schematic diagram of a cross roller reverser for a linear guide rail with cross return rollers (Example 1) according to this utility model; Figure 8 This is a schematic diagram of the cross roller return ball tube of a linear guide rail with cross return rollers (Example 1) according to this utility model; Figure 9 This is a schematic diagram of the roller groove moving rod of a linear guide rail with cross-flow rollers (Example 1) according to this utility model; Figure 10 This is a schematic diagram of a linear guide rail with cross-flow rollers according to the present invention (Embodiment 2); Figure 11 This is a side view of a linear guide rail with cross-flow rollers according to the present invention (Embodiment 2); Figure 12 yes Figure 11 Sectional view at point C; Figure 13 This is an exploded view of a linear guide rail with cross-flow rollers according to the present invention (Embodiment 2); Figure 14 This is an assembly diagram of the roller groove moving seat and the cross roller assembly of a linear guide rail with cross-flow rollers (Example 2) according to this utility model; Figure 15 This is a schematic diagram of the assembly of the roller guide channel block and the cross roller assembly of a linear guide rail with cross-flow rollers (Embodiment 2) according to this utility model; Figure 16 yes Figure 15 A magnified view of the area at point D; The components in the attached diagram are labeled as follows: 1-Flat cover plate; 2-Module moving seat; 3-Flat plate mover; 4-Roller groove rod; 5-Roller groove moving seat; 511-First crossed roller reverser; 5111-Arc-shaped right-angle V-groove; 512-Crossed roller return tube; 5121-Tube body; 5122-Connecting part; 5123-Return through hole; 513-Roller groove moving rod; 5131-Straight right-angle V-groove; 521- Second crossed roller reverser; 5211-U-shaped right-angle V-groove; 522-Roller guide channel block; 5221-Ball return groove; 5222-Moving groove; 6-Stator assembly; 601-Flat stator; 7-Rail base; 701-Crossed roller guide rail base; 702-End cover; 8-Crossed roller assembly; 801-First roller; 802-Second roller; a-First direction; b-Second direction; c-Third direction. Detailed Implementation
[0015] The utility model objective of this utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. The embodiments cannot be described one by one here, but the implementation of this utility model is not limited to the following embodiments. Example 1
[0016] In this embodiment, in the first direction a, the arrow points to the right and to the left; in the second direction b, the arrow points to the rear and to the front; and in the third direction c, the arrow points to the top and to the bottom.
[0017] A linear guide with cross-flow rollers includes a flat cover plate 1, a module moving seat 2, a flat moving head 3, two roller groove rods 4, two roller groove moving seats 5, a stator assembly 6, a track base 7, and a cross roller assembly 8. The cross roller assembly 8 includes multiple first rollers 801 and multiple second rollers 802. Each roller groove moving seat 5 includes two first cross roller reversers 511, a cross roller return tube 512, and a roller groove moving rod 513. The stator assembly 6 includes nine flat stators 601. The first rollers 801 and second rollers 802 have identical structures. The multiple first rollers 801 are parallel to each other and arranged sequentially. The second rollers 802 are located between two adjacent first rollers 801, and the multiple second rollers 802 are parallel to each other. The second rollers 802 and the first rollers 801 intersect each other perpendicularly to form the cross roller assembly 8. Both cross roller return tubes 512 are installed at the lower end of the module moving seat 2. Each cross roller return tube 512 has two ends connected to one end of two first cross roller reversers 511 to form a return ball channel. A portion of the cross roller assembly 8 is slidably connected to the return ball channel. The other ends of the two first cross roller reversers 511 are connected to both ends of the roller groove moving rod 513. The two first cross roller reversers 511 on the front or rear side are respectively connected to the left and right ends of the module moving seat 2, that is, four first cross roller reversers 511 are respectively installed on the left and right ends of the module moving seat 2. The roller groove moving rod 513 and the roller groove rod 4 form a moving channel, and another portion of the cross roller assembly 8 is slidably connected to the moving channel. The roller groove rod 4 is installed on the front and rear sides of the track base 7, and nine flat stators 601 are connected in sequence in a linear distribution and installed inside the track base 7. A flat moving head 3, two roller groove moving rods 513, and two crossed roller return tubes 512 are all installed at the lower end of the module moving seat 2. The flat moving head 3 is located in the middle of the lower end of the module moving seat 2, the two roller groove moving rods 513 are located on the outside of the flat moving head 3, and the two crossed roller return tubes 512 are located on the outside of the two roller groove moving rods 513 respectively. The flat moving head 3 extends into the track base 7 and is parallel to the stator assembly 6. The two ends of the flat cover plate 1 are connected to the two ends of the track base 7, and the flat cover plate 1 is parallel to the upper end of the module moving seat 2.
[0018] The flat cover plate 1 covers the track base 7, preventing external dust and chips from entering the rolling area and protecting the crossed roller assembly 8, the return ball groove, and the moving groove; it also constrains the vibration amplitude of the module moving seat 2, improving the smoothness of movement. The module moving seat 2 integrates the flat plate mover 3, the roller groove moving rod 513, and the crossed roller return ball tube 512. As the carrier of the moving parts, it is directly connected to the external load, and its rigid design affects the dynamic stability of the system. The flat plate mover 3 is made of silicon steel sheet and copper coil. Under the action of a magnetic field, it moves linearly along the stator assembly 6, converting electrical energy into mechanical kinetic energy. The roller groove rod 4 guides the rolling path of the crossed roller assembly 8, restricts the movement direction of the module moving seat 2, and ensures the trajectory accuracy of the linear motion. The roller groove moving seat 5 realizes the circulation and steering of the first roller 801 and the second roller 802. The stator 601 of the stator assembly 6 is made of permanent magnets. When current is applied, it generates a moving magnetic field, which interacts with the flat mover 3 to produce electromagnetic thrust, directly driving the load (without a mechanical transmission chain), achieving high-response, low-inertia linear motion. The track base 7 serves as the basic support platform for the system, providing structural rigidity and installation reference. The cross roller assembly 8 has a cross layout, enabling the guide rail to have equal load capacity in four directions. The first roller 801 or the second roller 802 are both cylinders with the same diameter and length, which evenly distribute the load, enhance the system's anti-overturning ability and rigidity, and reduce frictional resistance. The first cross roller reverser 511 has an arc-shaped right-angled V-groove 5111, which enables the turning of the circulating path of the cross roller assembly 8, reducing the jamming and impact when the rollers pass through curved sections. The cross roller return tube 512 allows some rollers to circulate back, maintaining the continuity of motion. The roller groove moving rod 513 cooperates with the roller groove rod 4 on the fixed side to drive the module moving seat 2 to translate.
[0019] The cross roller return tube 512 includes a connecting part 5122 and a tube body 5121. Both ends of the tube body 5121 are connected to the first cross roller reverser 511 through the connecting part 5122. The tube body 5121 is provided with a return ball through hole 5123. The cross ball through hole 5123 has a square cross section. The cross roller group 8 (i.e., the first roller 801 and the second roller 802) is slidably connected to the return ball through hole 5123.
[0020] The roller groove rod 4 and the roller groove moving rod 513 have similar structures, but the length of the roller groove rod 4 is greater than that of the roller groove moving rod 513. The roller groove moving rod 513 is provided with a straight right-angled V-groove 5131 with the same axis as its axis. The straight right-angled V-groove 5131 has a first side and a second side that are perpendicular to each other. The axis of the first roller 801 is perpendicular to the first side, and the axis of the second roller 802 is perpendicular to the second side.
[0021] The track base 7 includes a cross roller guide base 701 and two end caps 702. The lower ends of the two end caps 702 are perpendicularly connected to the two ends of the cross roller guide base 701, and the upper ends of the two end caps 702 are perpendicularly connected to the two ends of the flat cover plate 1.
[0022] The working process of a linear guide rail with cross-flow rollers is described as follows: A three-phase current is passed through the flat mover 3, generating a traveling magnetic field along the axial direction of the rail base 7. The magnetic field interacts with the permanent magnets of the stator assembly 6, generating a Lorentz force that propels the module moving seat 2 in linear motion. The first roller 801 contacts the first side of the straight right-angle V-groove 5131 of the roller groove moving rod 513, bearing the main load; the second roller 802 presses vertically against the second side of the straight right-angle V-groove 5131, resisting lateral torque. The first roller 801 or the second roller 802 uses rolling friction instead of sliding friction, reducing energy consumption and improving low-speed stability. When the first roller 801 or the second roller 802 moves to the end of the moving channel, it is captured by the first cross-roller reverser 511. The arc-shaped right-angle V-groove inside the first cross-roller reverser 511 guides the roller to turn 180° and enter the square through-hole of the return ball tube. The first roller 801 or the second roller 802 slides within the cross roller return tube 512 (the square hole matches the roller cross-section), returns to the starting end via the tube body 5121, and re-enters the moving channel. The flat cover plate 1 and the end cover 702 of the track base 7 form a closed cavity to prevent external impurities from entering the raceway. Direct drive by a linear motor reduces frictional heat generation, and combined with the rigid structure of the base, maintains thermal stability. Example 2
[0023] Except for the following technical features, the other technical features in this embodiment are the same as those in Embodiment 1.
[0024] In this embodiment, the roller channel moving seat 5 uses a second crossed roller reverser 521 and a roller guide channel block 522 instead of two first crossed roller reversers 511, a crossed roller return tube 512, and a roller channel moving rod 513. The second crossed roller reverser 521 is connected to the roller guide channel block 522 by screws. The roller guide channel block 522 has a connecting return groove 5221 and a moving groove 5222. The return groove 5221 and the second crossed roller reverser 521 form a return channel, and the moving groove 5222 and the roller channel rod 4 form a moving channel. The crossed roller assembly 8 can slide within the return channel and the moving channel. The roller guide channel block 522 is installed on the front and rear sides of the lower end of the module moving seat 2.
[0025] The second cross roller reverser 521 is provided with a U-shaped right-angled V-groove 5211, and the roller guide channel block 522 is provided with a ball return groove 5221 and a moving groove 5222. The U-shaped right-angled V-groove 5211 and the ball return groove 5221 of the roller guide channel block 522 form a ball return channel. The moving groove 5222 and the roller channel rod 4 form a moving channel.
[0026] The working process of the roller groove moving seat 5 is described as follows: The crossed roller assembly 8 (including the mutually perpendicular first roller 801 and second roller 802) is embedded in the moving groove 5222 of the roller guide groove block 522, and together with the roller groove rod 4 on the fixed side, forms a moving channel. The crossed roller assembly 8 rolls along a straight trajectory within the moving channel, bearing the load and transmitting kinetic force. Specifically: the axial direction of the first roller 801 is perpendicular to the first side of the V-shaped groove of the moving groove 5222, bearing the main load; the axial direction of the second roller 802 is perpendicular to the second side of the V-shaped groove, resisting lateral torque and ensuring motion stability. When the crossed roller assembly 8 moves to the end of the moving channel, it is captured by the U-shaped right-angle V-shaped groove 5211 of the second crossed roller reverser 521. The U-shaped right-angle V-groove 5211 guides the first roller 801 or the second roller 802 to turn 180°. After turning, the crossed roller assembly 8 enters the ball return groove 5221 of the roller guide channel block 522, forming a closed ball return channel together with the U-shaped right-angle V-groove 5211 of the second crossed roller reverser 521. The portion of the crossed roller assembly 8 that flows back to the starting end re-enters the moving groove 5222 through the connection between the ball return groove 5221 and the moving groove 5222, and participates in bearing and guiding again.
[0027] The above-described specific embodiments are preferred embodiments of this utility model and are not intended to limit this utility model. Any other changes or equivalent substitutions made without departing from the technical solution of this utility model are included within the protection scope of this utility model.
Claims
1. A linear guide rail with cross-flow rollers, characterized in that: The system includes a flat cover plate (1), a module moving seat (2), a flat moving part (3), a roller groove rod (4), a roller groove moving seat (5), a stator assembly (6), a track base (7), and a cross roller assembly (8). The cross roller assembly (8) includes a first roller (801) and a second roller (802). The first roller (801) and the second roller (802) are perpendicular to each other to form the cross roller assembly (8). The roller groove moving seat (5) is provided with a ball return channel. The cross roller assembly (8) is slidably disposed in the ball return channel. The movable seat (5) and the roller groove rod (4) form a moving channel. The cross roller group (8) is installed in the return ball channel and the moving channel. The roller groove rod (4) and the stator group (6) are both installed on the track base (7). The roller groove movable seat (5) and the flat moving part (3) are both connected to the module movable seat (2). The flat moving part (3) extends into the track base (7) and corresponds to the stator group (6). The flat cover plate (1) is connected to the track base (7) and matches the module movable seat (2).
2. A linear guide rail with cross-flow rollers according to claim 1, characterized in that: The roller groove moving seat (5) includes a first cross roller reverser (511), a cross roller return tube (512), and a roller groove moving rod (513). The first cross roller reverser (511) is connected to both ends of the cross roller return tube (512) to form a return channel. Both ends of the return channel are connected to the roller groove moving rod (513). The roller groove moving rod (513) and the roller groove rod (4) form a moving channel. The first cross roller reverser (511) and the roller groove moving rod (513) are both installed on the module moving seat (2).
3. A linear guide rail with cross-flow rollers according to claim 2, characterized in that: The roller groove moving rod (513) is provided with a cross roller hook groove (5131). The cross roller hook groove (5131) is provided with a first side and a second side. The first side and the second side are perpendicular to each other. The axial direction of the first roller (801) is perpendicular to the first side, and the axial direction of the second roller (802) is perpendicular to the second side.
4. A linear guide rail with cross-flow rollers according to claim 2, characterized in that: The cross roller return tube (512) includes a connecting part (5122) and a tube body (5121). The two ends of the tube body (5121) are respectively connected to the first cross roller reverser (511) through the connecting part (5122). The tube body (5121) is provided with a return ball through hole (5123). The cross ball through hole (5123) has a square cross section. The cross roller group (8) is slidably connected to the return ball through hole (5123).
5. A linear guide rail with cross-flow rollers according to claim 1, characterized in that: The roller groove moving seat (5) includes a second cross roller reverser (521) and a roller guide groove block (522), the roller guide groove block (522) being connected to the module moving seat (2).
6. A linear guide rail with cross-flow rollers according to claim 5, characterized in that: The second cross roller reverser (521) is provided with a U-shaped right-angle V-groove (5211), and the U-shaped right-angle V-groove (5211) and the roller guide channel block (522) form a ball return channel.
7. A linear guide rail with cross-flow rollers according to claim 5, characterized in that: The roller guide channel block (522) is provided with a ball return groove (5221) and a moving groove (5222). The ball return groove (5221) and the second cross roller reverser (521) form a ball return channel, and the moving groove (5222) and the roller channel rod (4) form a moving channel.
8. A linear guide rail with cross-flow rollers according to claim 1, characterized in that: The stator group (6) includes multiple flat stators (601), which are arranged in a linear manner. The multiple flat stators (601) are installed in the track base (7), and each of the multiple flat stators (601) corresponds to the flat mover (3).
9. A linear guide rail with cross-flow rollers according to claim 1, characterized in that: The track base (7) includes a cross roller guide base (701) and an end cap (702). The lower end of the end cap (702) is connected to both ends of the cross roller guide base (701), and the upper end of the end cap (702) is connected to both ends of the flat cover plate (1).