High load bearing silent slide rail

Abstract

The present application relates to the technical field of slide rail, in particular to a high-load and low-noise slide rail, which comprises an upper rail, a middle rail and a lower rail, and a rolling body assembly is arranged between the upper rail and the middle rail and between the middle rail and the lower rail; the middle rail comprises a vertically arranged middle rail vertical plate body segment and a middle rail mounting segment integrally connected to the upper and lower positions of the middle rail vertical plate body segment, the middle rail mounting segment is composed of a horizontal support guide plate and a pair of arc-shaped guide plates, one end of the pair of arc-shaped guide plates is integrally connected to the upper and lower ends of the middle rail vertical plate body segment after being back-to-back connected, the other end of the pair of arc-shaped guide plates extends in an arc shape towards the two sides away from the center plane of the middle rail vertical plate body segment, and the horizontal support guide plate is integrally connected between the end portions of the arc-shaped extension ends of the pair of arc-shaped guide plates, thereby forming the main structure of the high-load support of the slide rail. The slide rail has the high-load and low-noise performance.

Description

Technical Field

[0001] This invention relates to the field of slide rail technology, and specifically to a high-load-bearing, silent slide rail. Background Technology

[0002] Drawer slides are common connectors used to enable linear movement of appliances, widely used in refrigerator drawers, furniture drawers, and other products to achieve a sliding connection between the drawer and the cabinet. Depending on the travel requirements, drawer slides can be designed with two or three sections. Three-section drawer slides typically include a lower slide fixed to the cabinet, a middle slide, and an upper slide connecting to the drawer, providing a wider range of extension.

[0003] To make the slide rail easy and flexible to operate, ball retaining assemblies are usually provided between the upper and middle rails and between the middle and lower rails. These assemblies consist of a ball retainer and a number of balls mounted on the ball retainer.

[0004] However, the existing three-section slide rails still have the following shortcomings in use: First, there is poor stability under high load conditions: when the slide rail needs to bear a heavy weight, it is easy to cause insufficient bearing strength of the balls and wear and deterioration, resulting in poor overall stability of the slide rail caused by the deformation of the middle rail under heavy load, which greatly reduces the service life of the slide rail.

[0005] Secondly, the operation is noisy: When the slide rail moves, it generates significant sliding and impact noise. The sliding noise mainly originates from the rolling noise of the ball retaining assembly, while the impact noise mainly occurs when excessive force or speed is applied to the slide rail. This can cause the middle rail and ball retainer to experience inertial movement due to the sudden and forceful pushing and pulling action of the retainer limit block. Consequently, the middle rail and rolling element retainer collide violently with the retainer limit block in front of the slide rail during this inertial movement, generating significant noise. This severely impacts the user experience and exacerbates wear on the impact points. Summary of the Invention

[0006] To address the aforementioned problems, this invention proposes a high-load-bearing, quiet slide rail, aiming to overcome the shortcomings of existing technologies and provide a slide rail that combines high load-bearing capacity with low noise performance. The specific technical solution is as follows: A high-load-bearing silent slide rail includes an upper rail, a middle rail, and a lower rail that are sequentially movable in a vertical position. Rolling element assemblies are respectively arranged between the upper rail and the middle rail, and between the middle rail and the lower rail. The middle rail includes a vertically erected middle rail plate segment and middle rail mounting segments integrally connected to the upper and lower parts of the vertical plate segment for mounting the rolling element assemblies. The middle rail mounting segments consist of a horizontal support guide plate and a pair of arc-shaped guide plates. One end of the pair of arc-shaped guide plates is integrally connected to the vertical end of the middle rail plate segment after being joined back-to-back. The other ends of the pair of arc-shaped guide plates extend arc-shaped away from the center plane of the vertical plate segment. The horizontal support guide plate is integrally connected between the ends of the arc-shaped extensions of the pair of arc-shaped guide plates, thus forming the main structure of the high-load-bearing support for the slide rail.

[0007] The middle rail installation section is formed by the horizontal support guide plate and a pair of arc-shaped guide plates being integrated and connected together, forming a triangular gap inside the cross-section of the middle rail installation section, consisting of one straight side and two arc-shaped sides.

[0008] Preferably, the rolling element assembly includes a rolling element cage and a set of first rolling elements and two sets of second rolling elements disposed on the rolling element cage; wherein, the first rolling elements are supported between the upper rail and the horizontal support guide plate, and the two sets of second rolling elements are respectively supported between the upper rail and a pair of arc-shaped guide plates, and between the lower rail and a pair of arc-shaped guide plates, thereby forming a stable guiding structure with high load-bearing support for the slide rail.

[0009] The upper and lower rails are both U-shaped cross-section tubes with an opening on one side, and the tube wall of the U-shaped cross-section tube extends inward in an arc shape near the opening. A section of the vertical plate of the middle rail is inserted into the opening of the U-shaped cross-section tube of the upper and lower rails along the axial direction of the slide rail. The first rolling element is supported on the U-shaped bottom end face of the U-shaped cross-section tube, and the second rolling element is supported on the arc-shaped extension part of the U-shaped cross-section tube.

[0010] In this invention, the rolling element cage includes a horizontal retaining plate directly opposite the horizontal support guide plate of the center rail and a vertical retaining plate integrally connected to the left and right ends of the horizontal retaining plate. The vertical retaining plate is provided with a bent portion that approaches the position of the arc-shaped guide plate of the center rail. The first rolling element is rotatably mounted on the horizontal support guide plate, and the second rolling element is rotatably mounted on the bent portion of the vertical retaining plate.

[0011] Preferably, the first rolling element is a roller, and the second rolling element is a ball; the horizontal retaining plate is provided with a plurality of roller mounting slots at intervals, and the rollers are respectively installed in each of the roller mounting slots; the bent portion of the vertical retaining plate is provided with a plurality of ball mounting holes at intervals, and the balls are respectively installed in each of the ball mounting holes.

[0012] Preferably, the horizontal retaining plate has arc-shaped positioning holes at both ends of the roller mounting groove along the axial direction of the roller, and a notch-shaped slot communicating with one side of the arc-shaped positioning hole is formed at the position of the arc-shaped positioning hole on the horizontal retaining plate; the two ends of the roller are respectively coaxially provided with shaft heads, and the shaft heads of the roller are engaged and positioned in the arc-shaped positioning hole through the notch-shaped slot.

[0013] Furthermore, the rollers are a combination of a number of flexible rollers and a number of rigid rollers, and the number of flexible rollers is greater than the number of rigid rollers.

[0014] Preferably, the number of rigid rollers is 2-8, and the number of flexible rollers is 2-10 times the number of rigid rollers.

[0015] The rigid rollers are spaced apart at the front and rear ends of the horizontal retaining plate, and the flexible rollers are spaced apart between the rigid rollers at both ends; or, the rigid rollers and the flexible rollers are arranged intermittently.

[0016] Preferably, for the flexible roller, the shaft head is a shaft that passes through the inner hole of the central axis of the flexible roller, and a miniature rolling bearing is provided between the shaft and the flexible roller to balance the high load-bearing capacity of the rigid roller and the ease of operation of the slide rail.

[0017] Furthermore, the ball is a combination of a number of flexible balls and a number of rigid balls, and the number of flexible balls is greater than the number of rigid balls.

[0018] Preferably, the number of rigid balls is 2-8, and the number of flexible balls is 2-10 times the number of rigid balls.

[0019] Preferably, the flexible roller is a plastic resin roller or a rubber roller, or the flexible roller is a flexible roller with a plastic resin layer or a rubber layer on its surface.

[0020] Preferably, the flexible ball is a plastic resin ball or a rubber ball, or the flexible ball is a flexible ball with a plastic resin layer or a rubber layer on its surface.

[0021] Preferably, the diameter of the flexible roller is 0.02-0.05 mm larger than the diameter of the rigid roller.

[0022] Preferably, the diameter of the flexible ball is 0.01-0.03 mm larger than the diameter of the rigid ball.

[0023] By making the diameter of the flexible roller 0.02-0.05 mm larger than that of the rigid roller, and the diameter of the flexible ball bearing 0.01-0.03 mm larger than that of the rigid ball bearing, it is ensured that the flexible rolling element always preferentially contacts the track during the slide rail movement, thereby achieving a good effect of absorbing vibration and reducing rolling noise.

[0024] Preferably, the height of the slide rail cross section is 28-38mm, and the width of the slide rail cross section is 13-18mm.

[0025] In this invention, retainer limit blocks are respectively provided on the upper rail, middle rail and lower rail.

[0026] Preferably, V-shaped elastic arms are provided at both ends of the rolling element holder along the sliding rail movement direction.

[0027] By providing V-shaped elastic arms at both ends of the rolling element cage, buffering can be achieved when the rolling element cage contacts the cage limit blocks on the upper, middle, and lower rails, thus avoiding impact.

[0028] Preferably, the retainer limiting blocks on the upper and lower rails adopt a stamped tongue structure, which is formed by stamping the plates of the upper and lower rails.

[0029] Preferably, the retainer limiting block on the middle rail adopts a double-peak protrusion structure.

[0030] In this invention, the stamped stop tongues on the upper and lower rails and the double-peaked protrusions on the middle rail are staggered in the direction of movement of the slide rail and do not interfere with each other.

[0031] When the slide rail moves, the stamped stop tongue can pass through the notch between the double-peaked protrusions without interfering with each other.

[0032] In this invention, the upper rail has two retainer limiting blocks, one of which is located at the front end of the upper rail, and the other is located at the rear end of the upper rail, maintaining a distance between them. The middle rail also has two retainer limiting blocks on its upper surface, one located at the front end of the middle rail and maintaining a distance between it and the front end, and the other located at the rear end of the middle rail. The lower rail also has two retainer limiting blocks, one located at the front end of the middle rail, and the other located at the rear end of the middle rail and maintaining a distance between it and the rear end. Finally, the lower rail has two retainer limiting blocks, one located at the front end of the lower rail and maintaining a distance between it and the front end, and the other located at the rear end of the lower rail.

[0033] The aforementioned spacing allows the slide rail to first generate a free travel period during movement, during which the retainer limit stop does not contact the rolling element retainer, before moving the rolling element retainer together. This achieves a longer overall travel for the three-section slide rail even when the rolling element retainer is relatively short.

[0034] Preferably, the middle rail is formed by bending and molding a plate, and the retainer limiting block on the middle rail adopts a double-peak protrusion structure, which is formed by molding the plate of the middle rail at the corresponding position to form a double-peak protrusion.

[0035] Preferably, after bending and molding, a butt joint for welding is formed on one side of the vertical plate section of the middle rail. A number of plug welding holes are also provided at intervals on the vertical plate section of the middle rail. By welding at the butt joint and plug welding hole positions of the vertical plate section of the middle rail, the integrated reinforcement structure of the middle rail is realized.

[0036] Preferably, the plug weld hole and the butt joint are located on both sides of the center plane of the vertical plate segment of the rail.

[0037] This invention provides a high-load-bearing, silent slide rail that achieves a perfect balance of high load-bearing capacity, low operating noise, and easy operation through structural mechanics optimization, innovative material composite design, and system buffer design. Its specific beneficial effects are as follows: First, the high-load-bearing silent slide rail of this invention achieves structural stability under high loads and a long service life through a specially designed irregular cross-section center rail. Specifically, the center rail is integrally connected to a vertical plate section, two pairs of upper and lower arc-shaped guide plates, and a horizontal support guide plate. The approximately triangular tubular cross-section of the upper and lower parts of the center rail, combined with the thicker double-plate integrally connected vertical plate section in the middle, results in a bending and torsional section modulus far exceeding that of traditional open thin-walled slide rails. Under heavy loads, this support structure with "micro-truss" effectively resists bending and torsional deformation, fundamentally solving the problem of poor overall stability and short service life of the slide rail caused by the deformation of the center rail under heavy loads. Furthermore, the combination of the arc-shaped guide plates and the horizontal support guide plates forms a triangular stable support for the rolling element cage, allowing the load to be more evenly distributed across the entire center rail, avoiding stress concentration and improving the stability of the support.

[0038] Secondly, the high-load-bearing silent slide rail of this invention employs a hybrid rolling element system composed of a small number of rigid rolling elements and a large number of flexible rolling elements. Through this combination of rigid and flexible rolling elements, along with precisely defined geometric relationships and internal structures, an unexpectedly low-noise effect is achieved. It significantly reduces noise during slide rail movement without compromising ease of operation. Comparative tests show that, under the same operating conditions as a fully rigid roller slide rail, the slide rail of this invention, using a combination of rigid and flexible rolling elements, reduces rolling noise by 5 decibels alone, achieving a qualitative leap.

[0039] Third, the high load-bearing silent slide rail of the present invention has V-shaped elastic arms at both ends of the rolling element retainer, which can absorb contact energy through elastic deformation, thereby significantly reducing the impact noise when the slide rail contacts the limit stop at the limit stroke due to excessive force or speed.

[0040] Fourth, in this invention, a high-load-bearing, silent slide rail has stamped stop tongues on the upper and lower rails and double-peaked protruding blocks on the middle rail that are offset from each other in the direction of movement. This allows the stop tongues to pass through the notches between the double-peaked protrusions without interference. This cleverly solves the problem of collision and interference between the limit blocks at various levels in multi-section slide rails, ensuring that the slide rail achieves a longer stroke within a limited space, while ensuring reliable operation of the linkage mechanism throughout the entire process.

[0041] Fifth, the high load-bearing silent slide rail of the present invention has made comprehensive innovations in structural mechanics, materials science and tribology. In particular, through the synergistic effect of the "rigid-flexible rolling element system with micro-bearings" and the "high-strength irregular-shaped middle rail", it has made breakthrough progress in significantly improving load-bearing capacity and greatly reducing operating noise, and has extremely high market value and broad application prospects. Attached Figure Description

[0042] Figure 1 This is an overall assembly structure diagram of a high load-bearing silent slide rail according to the present invention; Figure 2 yes Figure 1 A schematic diagram of the middle rail structure; Figure 3 yes Figure 2 The cross-sectional view of the center rail; Figure 4 It is Figure 1 A schematic diagram of the structure after the upper and lower rails have been removed; Figure 5 yes Figure 4 A schematic diagram of the rolling element cage structure; Figure 6 yes Figure 5 A magnified view of a portion of the image; Figure 7 It involves installing the first rolling element (roller) onto... Figure 6 A schematic diagram of the structure behind the roller mounting groove of the rolling element cage; Figure 8 This is a structural diagram of the upper and lower rails.

[0043] In the diagram: 101, upper rail; 102, middle rail; 103, lower rail; 106, rolling element; 112, cage limit stop; 122, V-shaped elastic arm. In the diagram: 001, Rolling element assembly; 002, Rolling element cage; 003, Vertical plate section of the center rail; 004, Center rail mounting section; 005, Horizontal support guide plate; 006, Arc-shaped guide plate; 007, Center plane; 008, Straight edge; 009, Arc-shaped edge; 010, Triangular gap; 011, First rolling element (roller); 012, Second rolling element (ball); 013, Opening; 014, Arc-shaped extension; 015, Horizontal retaining plate; 016, Vertical retaining plate; 017, Bending section; 018, Roller mounting groove; 019, Ball mounting hole; 020, Arc-shaped positioning hole; 021, Notch-type slot; 022, Shaft head; 023, Butt joint.

[0044] In the diagram: A is the rear end of the slide rail, and B is the front end of the slide rail. Detailed Implementation

[0045] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solutions of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0046] Example 1: like Figures 1 to 8The illustration shows an embodiment of a high-load-bearing silent slide rail according to the present invention, comprising an upper rail 101, a middle rail 102, and a lower rail 103 arranged sequentially in vertical positions. Rolling element assemblies 001 are respectively arranged between the upper rail 101 and the middle rail 102, and between the middle rail 102 and the lower rail 103. The middle rail 102 includes an upright vertical plate segment 003 and a middle rail mounting segment 004 integrally connected to the upper and lower parts of the vertical plate segment 003 for mounting and connecting the rolling element assemblies 001. The middle rail mounting segment 004 is guided by horizontal supports. The system consists of a plate 005 and a pair of arc-shaped guide plates 006. One end of each pair of arc-shaped guide plates 006 is connected back-to-back to the vertical end of the middle rail section 003 in the vertical direction. The other end of each pair of arc-shaped guide plates 006 extends arc-shaped away from the center plane 007 of the middle rail section 003. The horizontal support guide plate 005 is integrated between the ends of the arc-shaped extensions of the pair of arc-shaped guide plates 006, thus forming the main structure of the high load-bearing support for the slide rail.

[0047] The middle rail installation section 004 is formed by the horizontal support guide plate 005 and a pair of arc-shaped guide plates 006 being integrated and connected together, forming a triangular gap 010 inside the cross section of the middle rail installation section 004, consisting of one straight side 008 and two arc-shaped sides 009.

[0048] The rolling element assembly 001 includes a rolling element cage 002 and a set of first rolling elements 011 and two sets of second rolling elements 012 disposed on the rolling element cage 002. The first rolling elements 011 are supported between the upper rail 101 and the horizontal support guide plate 005, and the two sets of second rolling elements 012 are respectively supported between the upper rail 101 and a pair of arc-shaped guide plates 006, and between the lower rail 103 and a pair of arc-shaped guide plates 006, thereby forming a stable guiding structure with high load-bearing capacity of the slide rail.

[0049] The upper rail 101 and the lower rail 103 are both U-shaped cross-section tubes with an opening 013 on one side. The tube wall of the U-shaped cross-section tube extends inward in an arc shape near the opening 013 to form an arc-shaped extension portion 014. A section of the vertical plate segment 003 of the middle rail is inserted into the opening 013 of the U-shaped cross-section tube of the upper rail 101 and the lower rail 103 along the axial direction of the slide rail. The first rolling element 011 is supported on the U-shaped bottom end face of the U-shaped cross-section tube, and the second rolling element 012 is supported on the arc-shaped extension portion 014 of the U-shaped cross-section tube.

[0050] In this embodiment, the rolling element retainer 002 includes a horizontal retaining plate 015 facing the horizontal support guide plate 005 of the center rail 102 and a vertical retaining plate 016 integrally connected to the left and right ends of the horizontal retaining plate 015. The vertical retaining plate 016 is provided with a bent portion 017 that approaches the position of the arc-shaped guide plate 006 of the center rail 102. The first rolling element 011 is rotatably disposed on the horizontal support guide plate 005, and the second rolling element 012 is rotatably disposed on the bent portion 017 of the vertical retaining plate 016.

[0051] Wherein, the first rolling element 011 is a roller, and the second rolling element 012 is a ball; the horizontal retaining plate 015 is provided with a number of roller mounting slots 018 at intervals, and the rollers are respectively installed in each of the roller mounting slots 018; the bent portion 017 of the vertical retaining plate 016 is provided with a number of ball mounting holes 019 at intervals, and the balls are respectively installed in each of the ball mounting holes 019.

[0052] Specifically, the horizontal retaining plate 015 has arc-shaped positioning holes 020 at both ends of the roller mounting groove 018 along the axial direction of the roller, and a notch-shaped slot 021 communicating with one side of the arc-shaped positioning hole 020 is formed at the position of the arc-shaped positioning hole 020 on the horizontal retaining plate 015; the two ends of the roller are respectively coaxially provided with shaft heads 022, and the shaft heads 022 of the roller are engaged and positioned in the arc-shaped positioning hole 020 through the notch-shaped slot 021.

[0053] Furthermore, the rollers are a combination of a number of flexible rollers and a number of rigid rollers, and the number of flexible rollers is greater than the number of rigid rollers.

[0054] The number of rigid rollers is 2-8, and the number of flexible rollers is 2-10 times the number of rigid rollers.

[0055] The rigid rollers are spaced apart at the front and rear ends of the horizontal retaining plate 015, and the flexible rollers are spaced apart between the rigid rollers at both ends; or, the rigid rollers and the flexible rollers are arranged intermittently.

[0056] Specifically, for the flexible roller, the shaft head 022 is a shaft that passes through the inner hole of the central axis of the flexible roller, and a miniature rolling bearing is provided between the shaft and the flexible roller to balance the high load-bearing capacity of the rigid roller and the ease of operation of the slide rail.

[0057] Furthermore, the ball is a combination of a number of flexible balls and a number of rigid balls, and the number of flexible balls is greater than the number of rigid balls.

[0058] The number of rigid balls is 2-8, and the number of flexible balls is 2-10 times the number of rigid balls.

[0059] The flexible roller is a plastic resin roller or a rubber roller, or the flexible roller has a plastic resin layer or a rubber layer on its surface.

[0060] The flexible ball is a plastic resin ball or a rubber ball, or the flexible ball is a flexible ball with a plastic resin layer or a rubber layer on its surface.

[0061] The diameter of the flexible roller is 0.02-0.05 mm larger than the diameter of the rigid roller.

[0062] The diameter of the flexible ball is 0.01-0.03 mm larger than that of the rigid ball.

[0063] By making the diameter of the flexible roller 0.02-0.05 mm larger than that of the rigid roller, and the diameter of the flexible ball bearing 0.01-0.03 mm larger than that of the rigid ball bearing, it is ensured that the flexible rolling element always preferentially contacts the track during the slide rail movement, thereby achieving a good effect of absorbing vibration and reducing rolling noise.

[0064] The height of the slide rail cross section is 28-38mm, and the width of the slide rail cross section is 13-18mm.

[0065] In this embodiment, retainer limit blocks 112 are respectively provided on the upper rail 101, the middle rail 102 and the lower rail 103.

[0066] V-shaped elastic arms 122 are provided at both ends of the rolling element holder 002 along the sliding rail movement direction.

[0067] By providing V-shaped elastic arms 122 at both ends of the rolling element cage 002, the rolling element cage 002 can achieve buffering when it comes into contact with the cage limiting blocks 112 on the upper rail 101, middle rail 102 and lower rail 103, thus avoiding impact.

[0068] The retainer limiting block 112 on the upper rail 101 and the lower rail 103 adopts a stamped tongue structure, which is formed by stamping the plates of the upper rail 101 and the lower rail 103.

[0069] The retainer limiting block 112 on the middle rail 102 adopts a double-peak protrusion structure.

[0070] In this embodiment, the stamped stop tongues on the upper rail 101 and the lower rail 103 and the double-peaked protrusions on the middle rail 102 are staggered in the direction of movement of the slide rail and do not interfere with each other.

[0071] When the slide rail moves, the stamped stop tongue can pass through the notch between the double-peaked protrusions without interfering with each other.

[0072] In this embodiment, the upper rail 101 has two retainer limiting blocks 112, one of which is located at the front end B of the upper rail 101, and the other is located at the rear end of the upper rail 101, maintaining a distance between it and the rear end A of the upper rail 101. The middle rail 102 also has two retainer limiting blocks 112 on its upper surface, one of which is located at the front end of the middle rail 102, maintaining a distance between it and the front end B of the middle rail 102, and the other is located at the rear end of the middle rail 102. End A; the number of retainer limiting blocks 112 on the lower end face of the middle rail 102 is two, one retainer limiting block 112 is located at the front end B of the middle rail 102, and the other retainer limiting block 112 is located at the rear of the middle rail 102 and maintains a distance between it and the rear end A of the middle rail 102; the number of retainer limiting blocks 112 on the lower rail 103 is two, one retainer limiting block 112 is located at the front of the lower rail 103 and maintains a distance between it and the front end B of the lower rail 103, and the other retainer limiting block 112 is located at the rear end A of the lower rail 103.

[0073] The aforementioned interval setting allows the slide rail to first generate a free stroke during movement, during which its retainer limit block 112 does not contact the rolling element retainer 002, before driving the rolling element retainer 002 to move together. This achieves a longer overall stroke for the three-section slide rail even when the rolling element retainer 002 is relatively short.

[0074] The middle rail 102 is formed by bending and molding a plate. The retainer limiting block 112 on the middle rail 102 adopts a double-peak protrusion structure, which is formed by molding the plate of the middle rail 102 at the corresponding position to form a double-peak protrusion.

[0075] In this design, the plate of the middle rail 102, after being bent and molded, forms a butt joint for welding at the middle position of one side of the vertical plate section 003 of the middle rail. The vertical plate of the middle rail is also provided with a number of plug welding holes (not shown in the figure) at intervals. By welding at the butt joint position and the plug welding hole position of the vertical plate section 003 of the middle rail, the integrated reinforcement structure of the middle rail 102 is realized.

[0076] The plug weld hole and the butt joint are located on both sides of the center plane 007 of the vertical plate segment 003 of the rail.

[0077] Example 2: This embodiment is an example for verifying the noise of slide rail movement.

[0078] [Test Environment and Equipment] The test was conducted in a semi-anechoic chamber with a background noise level below 25 dB(A). The slide rail under test was fixed to the test bench in the center of the anechoic chamber using standard clamps. The natural frequency of the test bench was much higher than the test frequency band to avoid resonance interference.

[0079] Noise measurement equipment: Precision sound level meter, meeting the accuracy requirements of IEC 61672 standard Class 1. The microphone is fixed on a tripod, located 0.5 meters horizontally and 0.5 meters vertically from the side of the slide rail.

[0080] Drive device: Programmable linear drive module, used to simulate the action of a human hand pushing and pulling a drawer, ensuring that the motion speed, acceleration and stroke are completely consistent in each test.

[0081] Load simulation: A standard load plate is fixed on the upper rail of the slide rail, and a 20kg standard weight is placed on the plate. The center of gravity position simulates the off-center load state of the actual drawer.

[0082] [Test Sample Preparation] Comparative Example (Fully Rigid Rolling Element Slide Rail): A slide rail with identical structure, dimensions, and material to the present invention, except for the rolling element material. All rolling elements (including rollers and balls) between the upper and lower middle rails are rigid rolling elements made of GCr15 bearing steel, and their dimensional tolerances and surface finish are consistent with those of the rigid rolling elements of the present invention.

[0083] The slide rail of this invention is a set of slide rails that adopts all the technical solutions of this invention. Its rolling elements are configured as follows: the rollers are a combination of 4 rigid rollers and 16 flexible rollers (the outer layer of the flexible rollers is polyurethane, and the diameter is 0.03mm larger than that of the rigid rollers); the balls are a combination of 4 rigid balls and 20 flexible balls (polyurethane balls, the diameter is 0.015mm larger than that of the rigid balls).

[0084] [Testing Methods and Data Collection] 1. Perform pre-run-in on the slide rails, with 100 strokes, to ensure even lubrication.

[0085] 2. Formal test: The drive module drives the upper rail of the slide rail to perform a full-stroke "fully pulled out - fully pushed back" cycle at a constant speed of 0.15 m / s.

[0086] 3. The sound level meter is set to "A" frequency weighting and "F" time weighting to continuously collect the equivalent continuous A-weighted sound level throughout the entire motion cycle, which is used as the noise value for that cycle.

[0087] 4. To eliminate random errors, each of the two types of slide rails was tested for 10 cycles, and the arithmetic mean of the noise values ​​from the 10 tests was taken as the final comparison data.

[0088] [Test Results]

Results Analysis

[0089] The comparative test shows that the invention achieves an unexpectedly significant noise reduction effect through its core design of "preferential contact between a slightly larger diameter flexible rolling element and the track," and this effect stems entirely from the innovative combination of rolling element materials. Furthermore, tests using a push-pull force gauge show that, under the same load, the push-pull force of the slide rail of this invention is essentially the same as that of the comparative all-rigid slide rail, proving that it achieves significant noise reduction without sacrificing ease of operation.

[0090] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A high-load-bearing, silent slide rail, characterized in that, The slide rail includes an upper rail, a middle rail, and a lower rail that are sequentially movable in a vertical position. Rolling element assemblies are respectively arranged between the upper rail and the middle rail, and between the middle rail and the lower rail. The middle rail includes a vertically arranged middle rail plate segment and a middle rail mounting segment integrally connected to the upper and lower parts of the middle rail vertical plate segment for mounting the rolling element assemblies. The middle rail mounting segment consists of a horizontal support guide plate and a pair of arc-shaped guide plates. One end of the pair of arc-shaped guide plates is integrally connected to the vertical end of the middle rail vertical plate segment after being joined back to back. The other end of the pair of arc-shaped guide plates extends arc-shapedly away from the center plane of the middle rail vertical plate segment. The horizontal support guide plate is integrally connected between the ends of the arc-shaped extensions of the pair of arc-shaped guide plates, thereby forming the main structure of the slide rail with high load-bearing capacity support.

2. The high load-bearing silent slide rail according to claim 1, characterized in that, The middle rail installation section is formed by the integrated connection of the horizontal support guide plate and a pair of arc-shaped guide plates, creating a triangular gap inside the cross-section of the middle rail installation section, consisting of one straight side and two arc-shaped sides.

3. The high load-bearing silent slide rail according to claim 1, characterized in that, The rolling element assembly includes a rolling element cage and a set of first rolling elements and two sets of second rolling elements disposed on the rolling element cage; wherein, the first rolling elements are supported between the upper rail and the horizontal support guide plate, and the two sets of second rolling elements are respectively supported between the upper rail and a pair of arc-shaped guide plates, and between the lower rail and a pair of arc-shaped guide plates, thereby forming a stable guiding structure with high load-bearing support for the slide rail.

4. A high-load-bearing, silent slide rail according to claim 3, characterized in that, Both the upper and lower rails are U-shaped cross-section tubes with an opening on one side, and the tube wall of the U-shaped cross-section tube extends inward in an arc shape near the opening. A section of the vertical plate of the middle rail near the upper and lower ends is inserted into the opening of the U-shaped cross-section tube of the upper and lower rails respectively along the axial direction of the slide rail. The first rolling element is supported on the U-shaped bottom end face of the U-shaped cross-section tube, and the second rolling element is supported on the arc-shaped extension part of the U-shaped cross-section tube.

5. A high-load-bearing, silent slide rail according to claim 3, characterized in that, The rolling element cage includes a horizontal retaining plate directly opposite the horizontal support guide plate of the center rail and a vertical retaining plate integrally connected to the left and right ends of the horizontal retaining plate. The vertical retaining plate is provided with a bent portion that approaches the position of the arc-shaped guide plate of the center rail. The first rolling element is rotatably mounted on the horizontal support guide plate, and the second rolling element is rotatably mounted on the bent portion of the vertical retaining plate.

6. A high-load-bearing, silent slide rail according to claim 5, characterized in that, The first rolling element is a roller, and the second rolling element is a ball; the horizontal retaining plate is provided with a number of roller mounting slots at intervals, and the rollers are respectively installed in each of the roller mounting slots; the bent portion of the vertical retaining plate is provided with a number of ball mounting holes at intervals, and the balls are respectively installed in each of the ball mounting holes.

7. A high-load-bearing silent slide rail according to claim 6, characterized in that, Arc-shaped positioning holes are provided along the axial direction of the roller at both ends of the roller mounting groove on the horizontal retaining plate, and a notch-shaped slot communicating with one side of the arc-shaped positioning hole is provided at the position of the arc-shaped positioning hole on the horizontal retaining plate; a shaft head is provided coaxially at both ends of the roller, and the shaft head of the roller is engaged and positioned in the arc-shaped positioning hole through the notch-shaped slot.

8. A high-load-bearing, silent slide rail according to claim 6, characterized in that, The rollers are a combination of a number of flexible rollers and a number of rigid rollers, and the number of flexible rollers is greater than the number of rigid rollers.

9. A high-load-bearing silent slide rail according to claim 6, characterized in that, The ball bearings are a combination of a number of flexible ball bearings and a number of rigid ball bearings, and the number of flexible ball bearings is greater than the number of rigid ball bearings.

10. A high-load-bearing, silent slide rail according to claim 8, characterized in that, The flexible roller is a plastic resin roller or a rubber roller, or the flexible roller is a flexible roller with a plastic resin layer or a rubber layer on its surface.

11. A high-load-bearing, silent slide rail according to claim 9, characterized in that, The flexible ball is a plastic resin ball or a rubber ball, or the flexible ball is a flexible ball with a plastic resin layer or a rubber layer on its surface.

12. A high-load-bearing, silent slide rail according to claim 8, characterized in that, The diameter of the flexible roller is 0.02-0.05 mm larger than the diameter of the rigid roller.

13. A high-load-bearing, silent slide rail according to claim 9, characterized in that, The diameter of the flexible ball is 0.01-0.03 mm larger than the diameter of the rigid ball.

14. A high-load-bearing, silent slide rail according to claim 1, characterized in that, The height of the slide rail cross section is 28-38mm, and the width of the slide rail cross section is 13-18mm.

15. A high-load-bearing, silent slide rail according to claim 14, characterized in that, The middle rail is formed by bending and molding a plate. The retainer limit block on the middle rail adopts a double-peak protrusion structure, which is formed by molding the plate of the middle rail at the corresponding position to form a double-peak protrusion.

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