Three-stage stretching slide rail

Abstract

The utility model relates to a three-stage stretching sliding rail which can reduce production cost, is relatively light in weight, is better in use effect, is smoother in steel ball rolling and is lower in noise, rail grooves of two outer rail strips are respectively provided with an inner rail strip, and a retainer is arranged between the corresponding outer rail strip and the inner rail strip. A row of steel ball through holes are respectively formed in two side wall plates in the retainer, a row of steel balls are respectively arranged between the inner wall surfaces of the two sides of the outer rail bar and the outer wall surfaces of the two sides of the corresponding inner rail bar, the outer side surfaces of the two inner rail bars are fixedly connected, and a plurality of steel ball retaining sleeves are arranged on the inner side surfaces of the wall plates. A first notch is formed in the upper portion of the steel ball retaining sleeve, and a second notch is formed in the lower portion of the steel ball retaining sleeve. The three-stage stretching slide rail has the advantages that the production cost can be reduced, the weight is relatively light, the use effect is better, the rolling of the steel balls is smoother, and the noise is lower.

Description

Technical Field

[0001] The utility model belongs to the technical field of slide rail manufacturing for vehicle-mounted refrigerators, and particularly relates to a three-stage extension slide rail. Background Art

[0002] The applicant's prior patent CN 215190366 U, entitled "A New Slide Rail," comprises two outer rails (1) and two inner rails (2), wherein an inner rail (2) is provided in the rail groove of each of the two outer rails (1), and a row of steel balls (3) is provided between the inner wall surfaces of both sides of the outer rails (1) and the outer wall surfaces of both sides of the corresponding inner rails (2), wherein the outer side surface of one outer rail (1) is fixedly connected to the outer side surface of the other inner rail (2). The two outer rails (1) have the same length and width. The invention also comprises two retaining frames (4), wherein a retaining frame (4) is provided between each of the outer rails (1) and the inner rails (2), and the angles between the wall panels (41) on both sides of the retaining frame (4) and the main body panel (42) of the retaining frame (4) are both right angles. Each side wall plate (41) is divided into a plurality of wall panels (44) by a plurality of notches (43). A steel ball through hole (45) is provided on the front of each wall panel (44), and the steel ball through hole (45) passes through both the front and back sides of the wall panel (44). The wall panel (44) is T-shaped, and a notch (46) is provided on the main plate (42) facing the notch (43), and the notch (46) and the notch (43) are mutually connected. A positioning protrusion (11) is provided on the outer side surface of one of the outer rails (1), and a positioning groove (21) is provided on the outer side surface of one of the inner rails (2). The outer rail (1) and the inner rail (2) are fixedly connected by spot welding after the positioning protrusion (11) and the positioning groove (21) are matched. The disadvantages are: first, in this new type of slide rail, the outer side surface of one outer rail is fixedly connected to the outer side surface of the other inner rail, and the inner rail and outer rail located on the outside of the new type of slide rail are respectively installed outward (that is, the outer rail located on the outside is fixedly installed with the main body of the car refrigerator in the electric vehicle, and the inner rail located on the outside is fixedly installed with the box of the car refrigerator in the electric vehicle, so that the box can move relative to the main body through the slide rail). In the production of such a new type of slide rail, two inner rails of different specifications are required (one is fixedly connected to the corresponding inner rail, and the other is installed outward) and two outer rails of different specifications (the corresponding outer rails The outer rails are fixed to the inner rails, and the other is installed externally), since the outer rails and the inner rails have relatively poor versatility, this not only increases the production cost of a new type of slide rail, but also increases the replacement and maintenance cost of a new type of slide rail; secondly, the thickness of the wall plate in the retaining frame of this new type of slide rail is relatively thicker (the steel ball through-hole needs to reach a certain design depth so that the retaining frame can have a better use effect on the steel ball), which not only increases the weight of the retaining frame (and thus increases the overall weight of the new type of slide rail), but also increases the production cost of the retaining frame (and thus increases the production cost of a new type of slide rail) because the retaining frame uses more materials. Utility Model Content

[0003] Design purpose: In order to avoid the shortcomings of the background technology, a three-stage extension slide rail is designed that not only reduces production costs, but is also relatively lighter in weight, has better performance, and allows the steel balls to roll more smoothly and with less noise.

[0004] Design plan: To achieve the above design objectives.

[0005] 1. An inner rail is respectively provided in the rail groove of the two outer rails, and a retaining frame is provided between the corresponding outer rail and the inner rail, a row of steel ball through holes are respectively opened on the side wall panels of the retaining frame, and the steel ball through holes pass through the front and back sides of the wall panels, a row of steel balls are respectively provided between the inner wall surfaces of the two sides of the outer rail and the outer wall surfaces of the corresponding inner rail, and the steel balls pass through the corresponding steel ball through holes, the outer side surfaces of the two inner rails are fixedly connected, the angle between the wall panel in the retaining frame and the main body plate in the retaining frame is 94°-96°, a plurality of steel ball retaining sleeves are provided on the inner side surface of the wall panel, and the through holes in the steel ball retaining sleeves are communicated with the corresponding steel ball through holes, the upper part of the steel ball retaining sleeve is provided with a notch one and the lower part of the steel ball retaining sleeve is provided with a notch two, which is one of the technical features of the present invention. The purpose of this design is: first, the outer sides of the two inner rails are fixedly connected, so that the production of a three-stage extension slide requires an inner rail of different specifications and an outer rail of different specifications, thereby improving the versatility of the outer rail and the inner rail, which not only reduces the production cost of a three-stage extension slide, but also reduces the replacement and maintenance cost (i.e., the use cost) of a three-stage extension slide; second, a plurality of steel ball retaining sleeves are provided on the inner side of the wall panel, and the through holes in the steel ball retaining sleeves are connected to the corresponding steel ball through holes. The setting of the steel ball retaining sleeves ensures that the depth of the steel ball through holes meets the design requirements while reducing The thickness of the wall panel in the retaining frame not only reduces the weight of the retaining frame (and thus reduces the overall weight of a three-stage extension slide rail), but also reduces the production cost of the retaining frame (and thus reduces the production cost of a three-stage extension slide rail) because the retaining frame uses relatively less material; thirdly, a notch one is provided on the upper part of the steel ball retaining sleeve and a notch two is provided on the lower part of the steel ball retaining sleeve. The setting of notch one and notch two can improve the smoothness of the rolling of the steel ball, thereby reducing the noise generated by the rolling of the steel ball during the extension and contraction of a three-stage extension slide rail, and thereby improving the use effect of a three-stage extension slide rail.

[0006] 2. The outer rail plate is provided with multiple mounting holes that extend through both sides of the plate, and the design in which locknuts are fixedly installed in the mounting holes is the second technical feature of this utility model. The purpose of this design is that the outer rail plate is provided with multiple mounting holes that extend through both sides of the plate, and the locknuts are fixedly installed in the mounting holes. The provision of locknuts facilitates the installation and assembly of a three-stage extension slide rail with an onboard refrigerator in an electric vehicle.

[0007] 3. The central portion of the main plate of the retainer is concavely formed with a groove, the depth of which is greater than the height of the exposed portion of the locknut exposed in the rail groove, and the width of which is greater than the diameter of the exposed portion of the locknut exposed in the rail groove. This is the third technical feature of the present invention. The purpose of this design is to form a groove in the central portion of the main plate of the retainer, the depth of which is greater than the height of the exposed portion of the locknut exposed in the rail groove, and the width of which is greater than the diameter of the exposed portion of the locknut exposed in the rail groove. The provision of the groove not only increases the strength of the retainer but also provides a buffer for the placement of the locknut.

[0008] 4. The outer rail is provided with arc-shaped chute 1 on both inner walls, and the inner rail is provided with arc-shaped chute 2 on both outer walls. The steel ball located between the inner and outer walls of the corresponding outer rail has one side located in the arc-shaped chute 1 and the other side located in the arc-shaped chute 2. This is the fourth technical feature of the present invention. The purpose of this design is to provide the outer rail with arc-shaped chute 1 on both inner walls, and the inner rail with arc-shaped chute 2 on both outer walls. The steel ball located between the inner and outer walls of the corresponding outer rail has one side located in the arc-shaped chute 1 and the other side located in the arc-shaped chute 2. The provision of the arc-shaped chute 1 and the arc-shaped chute 2 can further limit the steel ball, further improving the smoothness of its rolling.

[0009] Technical solution: A three-stage extension slide rail, comprising two outer rails, two inner rails, two retaining frames and four rows of steel balls, wherein an inner rail is respectively provided in the rail groove of the two outer rails and a retaining frame is provided between the corresponding outer rail and the inner rail, a row of steel ball through holes are respectively opened on the side wall panels in the retaining frame, and the steel ball through holes pass through the front and back sides of the wall panels, a row of steel balls are respectively provided between the two side inner wall surfaces of the outer rails and the two side outer wall surfaces of the corresponding inner rails, and the steel balls pass through the corresponding steel ball through holes, the outer side surfaces of the two inner rails are fixedly connected, the angles between the wall panels in the retaining frame and the main body panels in the retaining frame are both 94°-96°, a plurality of steel ball retaining sleeves are provided on the inner side surfaces of the wall panels, and the through holes in the steel ball retaining sleeves are communicated with the corresponding steel ball through holes, the upper part of the steel ball retaining sleeve is provided with a notch one and the lower part of the steel ball retaining sleeve is provided with a notch two.

[0010] Compared with the background technology, the utility model has a three-stage extension slide rail which can not only reduce the production cost, but also is relatively lighter in weight and has better use effect, and the steel balls roll more smoothly and with less noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a three-dimensional structural diagram of a three-stage extension slide rail.

[0012] Figure 2 It is a schematic diagram of the main structure of a three-stage extension slide.

[0013] Figure 3 It is a schematic diagram of the three-dimensional structure of the cage.

[0014] Figure 4 yes Figure 3 Enlarged view of circle A in the middle.

[0015] Figure 5 It is a schematic diagram of the main structure of the cage. DETAILED DESCRIPTION

[0016] Example 1: Refer to the attached Figure 1-Figure 5 . The cam 3 has two cams 12 and 13 which are connected to each other by a screw thread, and the cam 3 has two cams 12 and 13 which are connected to each other by a screw thread, and the cam 3 has two cams 12 and 13 which are connected to each other by a screw thread, and the cam 3 has two cams 12 and 13 which are connected to each other by a screw thread, and the cam 3 has two cams 12 and 13 which are connected to each other by a screw thread, and the cam 3 has two cams 12 and 13 which are connected to each other by a screw thread, and the cam 3 has two cams 12 and 13 which are connected to each other by a screw thread, and the cam 3 has two cams 12 and 13 which are connected to each other by a screw thread, Preferably, the angles between the wall plate 6 in the retainer 3 and the main plate 7 in the retainer 3 are both 95°. When the three-stage extension slide rail realizes three-stage extension, its length can reach 555 mm or more.

[0017] The outer rail 1 is provided with multiple mounting holes extending through both sides of the plate. Locknuts 11 are fixedly mounted within these holes. These locknuts 11 are M4 nuts. A recess 12 is formed inwardly in the center of the main plate 7 of the retainer 3. The depth of this recess 12 is greater than the height of the portion of the locknut 11 exposed within the rail groove, and the width of this recess 12 is greater than the diameter of the portion of the locknut 11 exposed within the rail groove.

[0018] An arc-shaped chute 13 is provided on the inner wall surfaces on both sides of the outer rail 1, and an arc-shaped chute 2 14 is provided on the outer wall surfaces on both sides of the inner rail 2. The steel ball 4 is located between the inner wall surface of the outer rail 1 and the outer wall surface of the inner rail 2, with one side located in the arc-shaped chute 1 13 and the other side located in the arc-shaped chute 2 14.

[0019] It should be understood that although the above embodiments provide a relatively detailed textual description of the design ideas of the present invention, these textual descriptions are merely simple textual descriptions of the design ideas of the present invention, rather than limitations on the design ideas of the present invention. Any combination, addition or modification that does not exceed the design ideas of the present invention shall fall within the scope of protection of the present invention.

Claims

1. A three-stage extension slide rail, comprising two outer rails (1), two inner rails (2), two retainers (3) and four rows of steel balls (4), wherein an inner rail (2) is provided in the rail groove of each of the two outer rails (1) and a retainer (3) is provided between the corresponding outer rails (1) and the inner rails (2), a row of steel ball through holes (5) are respectively opened on the side wall panels of the retainer (3), and the steel ball through holes (5) pass through the front and back sides of the wall panels, a row of steel balls (4) are respectively provided between the inner wall surfaces of the two sides of the outer rails (1) and the outer wall surfaces of the corresponding inner rails (2), and the steel balls (4) pass through the corresponding steel ball through holes (5), and the characteristics are: The outer side surfaces of the two inner rails (2) are fixedly connected, and the angles between the wall plate (6) in the retaining frame (3) and the main body plate (7) in the retaining frame (3) are both 94°-96°. A plurality of steel ball retaining sleeves (8) are provided on the inner side surface of the wall plate (6), and the through holes in the steel ball retaining sleeves (8) are communicated with the corresponding steel ball through holes (5). The upper part of the steel ball retaining sleeve (8) is provided with a notch 1 (9), and the lower part of the steel ball retaining sleeve (8) is provided with a notch 2 (10).

2. The three-stage extension slide rail according to claim 1, characterized in that: The included angles between the wall plate (6) in the retaining frame (3) and the main body plate (7) in the retaining frame (3) are both 95°.

3. A three-stage extension slide rail according to claim 1 or 2, characterized in that: The outer rail (1) is provided with a plurality of mounting through holes on the plate body, and the mounting through holes penetrate both the front and back sides of the plate body, and anti-loosening nuts (11) are fixedly installed in the mounting through holes.

4. The three-stage extension slide rail according to claim 3, characterized in that: The anti-loosening nut (11) is an M4 nut.

5. The three-stage extension slide rail according to claim 3, characterized in that: A groove (12) is formed inwardly in the middle of the main body plate (7) in the retaining frame (3), the depth of the groove (12) being greater than the height of the exposed portion of the anti-loosening nut (11) exposed in the rail groove, and the width of the groove (12) being greater than the diameter of the exposed portion of the anti-loosening nut (11) exposed in the rail groove.

6. A three-stage extension slide rail according to claim 1 or 2, characterized in that: The inner wall surfaces of both sides of the outer rail (1) are provided with arc-shaped chute 1 (13), and the outer wall surfaces of both sides of the inner rail (2) are provided with arc-shaped chute 2 (14). The steel ball (4) is located between the inner wall surface of the outer rail (1) and the outer wall surface of the inner rail (2), with one side located in the arc-shaped chute 1 (13) and the other side located in the arc-shaped chute 2 (14).

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