Linear guide bearing

Abstract

The utility model discloses a linear guide rail bearing, including the pole seat, first slide and second slide, first slide and second slide are respectively slidable and set on the upper and lower two side surfaces of pole seat, along the length direction of pole seat opposite or is opposite and slides, the upper side surface and the lower side surface of pole seat are arranged with a plurality of support bearing, the lower side surface of first slide is provided with first slide groove, the upper side surface of second slide is provided with second slide groove, the support bearing of pole seat upper side surface sets up in first slide groove, the outer ring of this support bearing and the groove wall of first slide groove are in abutment, the support bearing of pole seat lower side surface sets up in second slide groove, the outer ring of this support bearing and the groove wall of second slide groove are in abutment. The utility model discloses linear guide rail bearing simple and compact structure, and the support bearing only contacts with one side of slide groove, reduces friction resistance and abrasion, realizes smooth, high-precision relative movement, improves the stability of guiding and service life.

Description

Technical Field

[0001] This utility model relates to the field of mechanical transmission, and more specifically to a linear guide bearing. Background Technology

[0002] Currently available linear guide bearings typically use a structure where steel balls are directly inserted into grooves within the slider and secured by the guide rail. This design carries the risk of steel balls easily falling out, affecting the stability and safety of equipment operation. Simultaneously, the existing slider structure is relatively small, resulting in weak load-bearing capacity, which cannot meet the demands of high-load applications. Furthermore, the travel of the guide rail is often limited by its length, making long-stroke movements difficult and restricting its widespread application in automation equipment, CNC machine tools, and other fields. Therefore, there is an urgent need for a new type of linear guide bearing to address the risks of ball loss, improve load-bearing capacity, and extend the travel range. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a linear guide bearing that, through optimized structural design, effectively prevents the bearing from falling off, enhances the load-bearing capacity, and enables long-stroke motion.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a linear guide bearing, comprising a rod seat, a first slide rod, and a second slide rod. The first slide rod and the second slide rod are slidably disposed on the upper and lower sides of the rod seat, sliding relative to or away from each other along the length direction of the rod seat. A plurality of support bearings are arranged on the upper and lower sides of the rod seat. A first slide groove is formed on the lower side of the first slide rod, and a second slide groove is formed on the upper side of the second slide rod. The support bearings located on the upper side of the rod seat are disposed in the first slide groove, with their outer rings abutting against the groove wall of the first slide groove. The support bearings located on the lower side of the rod seat are disposed in the second slide groove, with their outer rings abutting against the groove wall of the second slide groove. In this case, the outer ring of one support bearing abuts against only one side of the groove wall of either the first or second slide groove.

[0005] As a further improvement of this utility model, several of the support bearings are staggered along the length of the rod seat at the axis of the rod seat, so that the outer ring of one support bearing abuts only one side wall of the first or second slide groove.

[0006] As a further improvement of this utility model, a drive gear is rotatably provided in the middle of the rod seat, a first rack is fixed to the bottom of the first slide groove, and a second rack is fixed to the bottom of the second slide groove. The first rack and the second rack mesh with the upper and lower sides of the drive gear, respectively.

[0007] As a further improvement of this utility model, the cross-section of the first groove is composed of two opposite circular arc edges and a straight edge at the upper end of the circular arc edges, and the shape of the circular arc edges matches the shape of the outer ring of the supporting bearing.

[0008] As a further improvement of this utility model, a first limiting strip and a second limiting strip are fixed on the left and right sides of the first slide rod and the second slide rod near their ends, and a rod seat limiting strip is fixed on the upper and lower sides of the rod seat. When the first limiting strip and the second limiting strip both abut against the rod seat limiting strip, the sliding position of the first slide rod and the second slide rod is limited.

[0009] The beneficial effects of this invention are as follows: the tight fit between the support bearing and the slide groove completely eliminates the risk of bearing detachment, improving motion stability and safety; the staggered arrangement of the support bearings optimizes load distribution, significantly enhancing load-bearing capacity and guiding accuracy; the meshing mechanism of the drive gear and rack enables synchronous control of the slide rod, expanding the stroke range; the cross-sectional design of the slide groove reduces friction and wear, extending service life; and the limiting strip structure ensures reliable limiting during the sliding process. The overall structure is compact and highly reliable, making it suitable for industrial automation, precision machinery, and other fields. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the linear guide bearing of this utility model; Figure 2 This is a cross-sectional view of the linear guide bearing of this utility model; Figure 3 for Figure 2 Enlarged view of section A; Figure 4 This is a schematic diagram of the end face of the linear guide bearing of this utility model. Detailed Implementation

[0011] The present invention will now be described in further detail with reference to the embodiments shown in the accompanying drawings.

[0012] Reference Figure 1 , Figure 2 and Figure 4As shown, the linear guide bearing of this embodiment includes a rod seat 1, a first slide rod 2, and a second slide rod 3. The first slide rod 2 and the second slide rod 3 are slidably disposed on the upper and lower sides of the rod seat 1, sliding relative to or away from each other along the length of the rod seat 1. A plurality of support bearings 4 are arranged on the upper and lower sides of the rod seat 1. A first sliding groove 5 is formed on the lower side of the first slide rod 2, and a second sliding groove 6 is formed on the upper side of the second slide rod 3. The support bearing 4 located on the upper side of the rod seat 1 is disposed within the first sliding groove 5, with its outer ring abutting against the groove wall of the first sliding groove 5. The support bearing 4 located on the lower side of the rod seat 1 is disposed within the second sliding groove 6, with its outer ring abutting against the groove wall of the second sliding groove 6. The outer ring of one support bearing 4 abuts only one side of the groove wall of either the first or second sliding groove 6. The support bearing 4 rolls within the groove, providing smooth linear motion. Simultaneously, the abutting action between the outer ring and the groove wall prevents the bearing from falling off, solving the ball drop problem in the prior art. In addition, the arrangement of the support bearing 4 improves the overall load-bearing capacity, allowing the slide bar to operate stably during long strokes.

[0013] Furthermore, refer to Figure 2 and Figure 3 As shown, several support bearings 4 are staggered along the length of the rod seat 1 at its axis, so that the outer ring of one support bearing 4 abuts against only one side wall of the first slide groove 5 or the second slide groove 6. This staggered distribution can simply and effectively ensure that the outer ring of one support bearing 4 abuts against only one side wall of the first slide groove 5 or the second slide groove 6.

[0014] Furthermore, refer to Figure 2 and Figure 4 As shown, a drive gear 7 is rotatably mounted in the middle of the rod base 1. A first rack 51 is fixed to the bottom of the first slide groove 5, and a second rack 61 is fixed to the bottom of the second slide groove 6. The first rack 51 and the second rack 61 mesh with the upper and lower sides of the drive gear 7, respectively. By rotating the drive gear 7, the first rack 51 and the second rack 61 move synchronously, causing the first slide rod 2 and the second slide rod 3 to slide relative to or away from each other, thus achieving precise displacement control and long-stroke applications.

[0015] Furthermore, the cross-section of the first slide groove 5 is composed of two opposing circular arc edges and a straight edge at the upper end of the circular arc edges. The shape of the circular arc edges matches the shape of the outer ring of the supporting bearing 4. The second slide groove 6 adopts a design that is symmetrical about the upper and lower axes with the first slide groove 5. This design ensures uniform contact between the bearing outer ring and the slide groove, reduces the coefficient of friction and wear, improves durability and operating efficiency, and also effectively prevents the first slide rod 2 and the second slide rod 3 from sliding up and down and falling off, eliminating the need for additional limiting components.

[0016] Furthermore, a first limiting strip 21 and a second limiting strip 31 are fixed to the left and right sides of the first slide rod 2 and the second slide rod 3 near their ends, respectively. A rod seat limiting strip 11 is fixed to the upper and lower sides of the rod seat 1. When both the first limiting strip 21 and the second limiting strip 31 abut against the rod seat limiting strip 11, the sliding position of the first slide rod 2 and the second slide rod 3 is limited. This prevents the slide rods from moving excessively or coming off, ensuring operational safety and equipment reliability.

[0017] In summary, this utility model, through its innovative structural design, effectively solves problems such as bearing detachment, low load-bearing capacity, and limited stroke, providing a high-performance linear motion solution.

[0018] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A linear guide bearing, comprising a rod seat (1), a first slide rod (2), and a second slide rod (3), wherein the first slide rod (2) and the second slide rod (3) are respectively slidably disposed on the upper and lower sides of the rod seat (1), and slide relative to or opposite to each other along the length direction of the rod seat (1), characterized in that: The upper and lower sides of the rod seat (1) are provided with a number of support bearings (4). The lower side of the first slide rod (2) is provided with a first slide groove (5), and the upper side of the second slide rod (3) is provided with a second slide groove (6). The support bearing (4) on the upper side of the rod seat (1) is located in the first slide groove (5), and the outer ring of the support bearing (4) abuts against the groove wall of the first slide groove (5). The support bearing (4) on the lower side of the rod seat (1) is located in the second slide groove (6), and the outer ring of the support bearing (4) abuts against the groove wall of the second slide groove (6). In this case, the outer ring of one support bearing (4) abuts against only one side of the groove wall of the first slide groove (5) or the second slide groove (6).

2. The linear guide bearing according to claim 1, characterized in that: Several of the support bearings (4) are staggered along the length of the rod seat (1) at the axis of the rod seat (1) so that the outer ring of one support bearing (4) abuts against only one side of the groove wall of the first groove (5) or the second groove (6).

3. The linear guide bearing according to claim 1 or 2, characterized in that: The rod seat (1) is rotatably provided with a drive gear (7) in the middle. The bottom of the first slide groove (5) is fixed with a first rack (51), and the bottom of the second slide groove (6) is fixed with a second rack (61). The first rack (51) and the second rack (61) mesh with the upper and lower sides of the drive gear (7) respectively.

4. The linear guide bearing according to claim 1 or 2, characterized in that: The cross-section of the first groove (5) is composed of two opposite circular arc edges and a straight edge at the upper end of the circular arc edges. The shape of the circular arc edges matches the shape of the outer ring of the supporting bearing (4).

5. The linear guide bearing according to claim 1 or 2, characterized in that: The first sliding rod (2) and the second sliding rod (3) are fixed with a first limiting strip (21) and a second limiting strip (31) on the left and right sides near the ends. The rod seat (1) is fixed with a rod seat limiting strip (11) on the upper and lower sides respectively. When the first limiting strip (21) and the second limiting strip (31) abut against the rod seat limiting strip (11), the sliding position of the first sliding rod (2) and the second sliding rod (3) is limited.

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