A roller bearing cage assembly device

Abstract

The application discloses a needle bearing retainer assembling device and relates to the technical field of bearing assembling.The device comprises a mounting assembly and a feeding assembly.The mounting assembly comprises a mounting frame, a first motor arranged on the mounting frame, a rotating rod connected with the first motor, a transverse plate fixedly connected with the mounting frame, a mounting plate fixedly connected with the transverse plate, a rotating disc arranged between the transverse plate and the mounting plate, a fixed disc arranged in the rotating disc, a ejector pin and a spring arranged on the fixed disc.The feeding assembly comprises a telescopic cylinder, a circular ring connected with the telescopic cylinder, a second motor arranged on the circular ring, and a driving rod connected with the second motor.The device is designed with six ejector pins and corresponding feeding stations, and can complete the feeding and pressing operation of six needles at one time.Compared with the traditional single needle or manual assembly, the efficiency is multiplied, and the key steps such as feeding, distributing, feeding and pressing are realized by mechanical automation, the manual intervention time is reduced, and the production rhythm is stable and fast.

Description

Technical Field

[0001] This invention relates to the technical field of bearing assembly, and more particularly to a needle roller bearing cage assembly device. Background Technology

[0002] Needle roller bearings, as a compact and high-load-bearing precision mechanical component, are widely used in the transmission systems of automotive gearboxes, engines, motorcycles, and various general-purpose machinery. With the evolution of precision manufacturing technology, their application scope has further expanded to high-end rolling bearing manufacturing fields such as industrial robot joint bearings and high-speed train transmission bearings. The cage is one of the key components of a needle roller bearing; its main function is to evenly separate the rolling elements (needles), guide the needles to move on the correct track, and prevent the needles from falling off.

[0003] In the manufacturing process of needle roller bearings, the assembly process is a crucial step in inserting the needle rollers into the cage pockets. To ensure that the needle rollers do not fall out of the cage during transportation and installation, the cage pockets are usually designed with a locking or narrowing structure, meaning the pocket opening width is slightly smaller than the needle roller diameter. Therefore, during assembly, a certain amount of external force must be applied to "press" or "lock" the needle rollers into the pockets, allowing them to overcome the resistance of the locking mechanism and enter their working position. In applications such as industrial robots and high-speed rail transportation, where bearing consistency requirements are extremely high, this assembly precision directly affects the service life of the entire machine.

[0004] However, existing needle roller bearing cage assembly technologies are largely inadequate. Currently, many small and medium-sized manufacturing enterprises still use purely manual methods or simple tooling for assembly. Operators need one hand to hold the cage while the other hand holds the needle rollers, pressing them one by one into the cage's pockets. Since cages typically contain multiple pockets (commonly 10 or more), and the needle rollers are small, manual handling and alignment are not only time-consuming but also easily affected by visual fatigue, making it difficult to improve assembly speed and becoming a bottleneck restricting the overall production line's capacity. Especially when dealing with precision needle roller bearings used in industrial robot reducers, traditional manual methods easily produce tiny scratches, making it difficult to meet stringent quality standards.

[0005] In summary, existing manual assembly methods can no longer meet the modern industrial demand for high-efficiency, high-quality, and low-labor-cost needle roller bearings, especially in the context of large-scale production of high-end industrial robot bearings and high-speed train bearings. Therefore, there is an urgent need to develop an assembly device that can replace manual labor and realize automatic needle roller pressing. Summary of the Invention

[0006] In view of the problems existing in the above-mentioned needle roller bearing cage assembly devices, the present invention provides a needle roller bearing cage assembly device that realizes automatic pressing of needle rollers.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a needle roller bearing cage assembly device, comprising: an installation assembly including a mounting frame, a first motor disposed on the mounting frame, a rotating rod connected to the first motor, a horizontal plate fixedly connected to the mounting frame, a mounting plate fixedly connected to the horizontal plate, a rotating disk disposed between the horizontal plate and the mounting plate, a fixed disk disposed within the rotating disk, and a pin and a spring disposed on the fixed disk; and a feeding assembly disposed on the mounting frame, including a telescopic cylinder, a ring connected to the telescopic cylinder, a second motor disposed on the ring, a drive rod connected to the second motor, a transmission rod rotatably connected to the drive rod, and a slider disposed on the ring.

[0008] In a preferred embodiment of the needle roller bearing cage assembly device of the present invention, the first motor is fixedly mounted on the mounting bracket, the output shaft of the first motor is fixedly connected to the rotating rod, the end of the rotating rod is located at the ejector pin, and a cage is fitted onto the end of the rotating rod.

[0009] In a preferred embodiment of the needle roller bearing cage assembly device of the present invention, a handle is rotatably provided on the horizontal plate, and the horizontal plate, the fixed plate, and the mounting plate are connected by threaded fastening, with the fixed plate disposed between the horizontal plate and the mounting plate.

[0010] In a preferred embodiment of the needle roller bearing cage assembly device of the present invention, the mounting plate is provided with six straight grooves, which are evenly distributed circumferentially on the mounting plate; the rotating disk is sleeved on the fixed disk and is rotatably connected to the fixed disk; the rotating disk is provided with a groove in the shape of a teardrop; a connecting rod is also connected to the rotating disk, one end of which is rotatably connected to the rotating disk and the other end of which is rotatably connected to the handle.

[0011] As a preferred embodiment of the needle roller bearing cage assembly device of the present invention, the fixed plate has six slots with the same shape as the straight grooves, and the positions of the slots correspond one-to-one with the straight grooves.

[0012] As a preferred embodiment of the needle roller bearing cage assembly device of the present invention, the following is provided: six ejector pins are provided, the ejector pins are slidably disposed in the slots, the ejector pins correspond one-to-one with the slots, and the ends of the ejector pins are made of magnetic material; a limiting block is also provided on the ejector pin, the limiting block is embedded in the straight groove, the limiting block corresponds one-to-one with the straight groove and is slidably connected to it.

[0013] In a preferred embodiment of the needle roller bearing cage assembly device of the present invention, six springs are provided, each spring is disposed in a linear groove and corresponds to a linear groove, one end of each spring is fixedly connected to the inner wall of the linear groove, and the other end is fixedly connected to a limiting block.

[0014] In a preferred embodiment of the needle roller bearing cage assembly device of the present invention, the horizontal plate, the mounting plate, and the fixed plate are all provided with through holes in their centers, and the end of the rotating rod is located in the through hole.

[0015] In a preferred embodiment of the needle roller bearing cage assembly device of the present invention, the telescopic cylinder is fixedly mounted on the mounting frame, the telescopic end of the telescopic cylinder is fixedly connected to the ring, the ring is provided with a slide rail, the second motor is fixedly mounted on the ring, the output shaft of the second motor is fixedly connected to the drive rod, and the drive rod passes through the ring.

[0016] In a preferred embodiment of the needle roller bearing cage assembly device of the present invention, six transmission rods are provided, each pair of transmission rods is rotatably connected to a slider, the center of each transmission rod is rotatably connected to a slider, the slider is slidably disposed in a slide rail, and an insertion groove is provided on the top of the slider.

[0017] The beneficial effects of this invention are:

[0018] This invention features six ejector pins and corresponding feeding stations, enabling the simultaneous feeding and pressing of all six needle rollers. Compared to traditional single-needle or manual assembly, efficiency is significantly improved. Feeding is achieved through a robotic arm or pushing component; material distribution is achieved by a second motor driving a slider; material feeding is achieved by a telescopic cylinder lifting; and pressing is achieved by a rotating disc driving the ejector pins. The automation of these key steps reduces manual intervention time, resulting in a stable and rapid production cycle. After one pressing cycle, the first motor drives the cage to rotate precisely to the next station, enabling continuous, cyclical assembly, ideal for mass production. A single drive source controls the rotating disc, such as a handle or a motor. The teardrop-shaped grooves on the disc simultaneously and synchronously push all six ejector pins towards the center, ensuring that the six needle rollers are pressed evenly and synchronously into the cage mounting holes, with consistent force, preventing cage deformation or needle roller jamming caused by sequential pressing. The operator's main tasks are simplified to placing the cage, starting the equipment or turning the handle, and conducting inspections. The heavy, repetitive, and meticulous work of precisely placing and pressing in needle rollers is entirely completed by the machine. This reduces human error caused by fatigue and also lowers the skill requirements for workers. Theoretically, by changing different specifications of the rotating disc, fixed disc, ejector pins, and limit blocks, it can accommodate cage assemblies of different models and numbers of needle rollers. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0020] Figure 1 This is a schematic diagram of the overall structure of the needle roller bearing cage assembly device of the present invention.

[0021] Figure 2 This is a schematic diagram of the mounting assembly structure of the needle roller bearing cage assembly device of the present invention.

[0022] Figure 3 This is a schematic diagram of the rotating disk structure of the needle roller bearing cage assembly device of the present invention.

[0023] Figure 4 This is a schematic diagram of the fixed disc structure of the needle roller bearing cage assembly device of the present invention.

[0024] Figure 5 This is a schematic diagram of the mounting plate structure of the needle roller bearing cage assembly device of the present invention.

[0025] Figure 6 This is a schematic diagram of the rotating rod structure of the needle roller bearing cage assembly device of the present invention.

[0026] Figure 7 This is a schematic diagram of the feeding assembly structure of the needle roller bearing cage assembly device of the present invention.

[0027] Figure 8 This is a schematic diagram of the annular structure of the needle roller bearing cage assembly device of the present invention.

[0028] Figure 9 This is a schematic diagram of the drive rod structure of the needle roller bearing cage assembly device of the present invention.

[0029] Reference numerals: 101, mounting bracket; 102, first motor; 103, rotating rod; 104, horizontal plate; 1041, handle; 105, mounting plate; 1051, straight groove; 106, rotating disk; 1061, groove; 1062, connecting rod; 107, fixed disk; 1071, slot; 108, ejector pin; 1081, limiting block; 109, spring; 201, telescopic cylinder; 202, ring; 2021, slide rail; 203, second motor; 204, drive rod; 205, transmission rod; 206, slider; 2061, insertion slot. Detailed Implementation

[0030] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0031] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0032] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0033] Secondly, the present invention is described in detail with reference to the schematic diagrams. When detailing the embodiments of the present invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. In addition, actual fabrication should include three-dimensional spatial dimensions of length, width, and depth.

[0034] Example 1

[0035] This embodiment provides a needle roller bearing cage assembly device, which includes an installation component and a feeding component.

[0036] Reference Figures 1-6 The mounting assembly includes a mounting frame 101, a first motor 102 mounted on the mounting frame 101, a rotating rod 103 connected to the first motor 102, a horizontal plate 104 fixedly connected to the mounting frame 101, a mounting plate 105 fixedly connected to the horizontal plate 104, a rotating disk 106 disposed between the horizontal plate 104 and the mounting plate 105, a fixed disk 107 disposed within the rotating disk 106, a pin 108 disposed on the fixed disk 107, and a spring 109.

[0037] Reference Figures 7-9 The feeding assembly is mounted on the mounting frame 101 and includes a telescopic cylinder 201, a ring 202 connected to the telescopic cylinder 201, a second motor 203 mounted on the ring 202, a drive rod 204 connected to the second motor 203, a transmission rod 205 rotatably connected to the drive rod 204, and a slider 206 mounted on the ring 202.

[0038] The first motor 102 is fixedly mounted on the mounting bracket 101. The output shaft of the first motor 102 is fixedly connected to the rotating rod 103. The end of the rotating rod 103 is located at the ejector pin 108, and a retainer is fitted onto the end of the rotating rod 103. A handle 1041 is also rotatably mounted on the horizontal plate 104. The horizontal plate 104, the fixing plate 107, and the mounting plate 105 are connected by threaded fastening. The fixing plate 107 is disposed between the horizontal plate 104 and the mounting plate 105. The mounting plate 105 has six straight grooves 1051 evenly distributed circumferentially on it. A rotating disk 106 is sleeved on the fixed disk 107 and rotatably connected to it. The rotating disk 106 has a teardrop-shaped groove 1061. A connecting rod 1062 is also connected to the rotating disk 106, with one end rotatably connected to the rotating disk 106 and the other end rotatably connected to a handle 1041. The fixed disk 107 has six slots 1071 of the same shape as the straight grooves 1051, each corresponding to one of the straight grooves 1051. Six ejector pins 108 are provided, each slidably disposed within a slot 1071, with each ejector pin 108 corresponding to a slot 1071. The ends of the ejector pins 108 are made of magnetic material. Each ejector pin 108 is also provided with a limiting block 1081, which is embedded in a straight groove 1051, corresponding to and slidably connected to the straight groove 1051. Six springs 109 are provided, each spring 109 disposed within a straight groove 1051, corresponding to a single groove 1051. One end of each spring 109 is fixedly connected to the inner wall of the straight groove 1051, and the other end is fixedly connected to the limiting block 1081.

[0039] The telescopic cylinder 201 is fixedly mounted on the mounting bracket 101. The telescopic end of the telescopic cylinder 201 is fixedly connected to the ring 202. The ring 202 has a slide rail 2021. The second motor 203 is fixedly mounted on the ring 202. The output shaft of the second motor 203 is fixedly connected to the drive rod 204. The drive rod 204 passes through the ring 202. Six transmission rods 205 are provided. The transmission rods 205 are rotatably connected in pairs. The center of each transmission rod 205 is rotatably connected to a slider 206. The slider 206 is slidably disposed in the slide rail 2021. The top of the slider 206 has an insertion groove 2061.

[0040] During use, the ejector pin 108 first needs to be loaded. An insertion slot 2061 is provided on the top of the slider 206. The ejector pins can be directly placed into the insertion slot 2061 via a robotic arm or other pushing components. The slider 206 has six ejector pins, allowing for the loading of six ejector pins at once. After the ejector pins are placed, the second motor 203 is started, and its output shaft rotates. The output shaft of the second motor 203 drives the drive rod 204 to rotate. When the drive rod 204 rotates, the transmission rod 205 connected to it is also driven. Since the transmission rod 205 is rotatably connected to the slider 206, it can only move along the slide rail 2021 where the slider 206 is located. When the drive rod 204 rotates, it causes the adjacent transmission rod 205 to turn horizontally, allowing the slider 206 to move horizontally. 6. Push away from the position of the second motor 203, and the transmission rods 205 are connected in pairs by rotation. Therefore, the transmission rods 205 will also carry out chain transmission, so that the corresponding sliders 206 of the transmission rods 205 are separated in pairs until each slider 206 is on the six equal division points of the ring 202, completing the alignment of the sliders 206 and the ejector pins 108. It should be noted that the transmission rod 205 farthest from the second motor 203 does not need to be connected to other transmission rods 205. Therefore, only half of the original transmission rod 205 is shown in the figure. At this time, the telescopic cylinder 201 is activated, which can make the ring 202 rise as a whole, and send the roller needles on the sliders 206 into the through holes. The end of the ejector pin 108 is made of magnetic material, which can attract the roller needles by magnetic force, completing the feeding operation of the roller needles.

[0041] After the needle rollers are fed, they can be installed into the retainer. Turning handle 1041 pulls connecting rod 1062, the other end of which is rotatably connected to rotating disk 106. Therefore, handle 1041 drives rotating disk 106 to rotate. As rotating disk 106 rotates, grooves 1061 on it rotate synchronously. Since grooves 1061 are teardrop-shaped, the gap left for fixed disk 107 decreases as they rotate. It should be noted that a ejector pin 108 is slidably disposed in the groove 1071 on fixed disk 107, and a limit block 1081 is fixedly disposed at the top of ejector pin 108. A spring 109 is connected to the limit block 1081, which maintains an outward pushing force on the limit block 1081, allowing the limit block 1081 to... When the groove 1061 on the rotating disk 106 becomes smaller, the ejector pin 108 will be pushed towards the center of the fixed disk 107. A retainer is set at the center of the fixed disk 107. The retainer is fixed by the rotating rod 103. The ejector pin 108 moves towards the retainer to press the needle rollers magnetically held at the end into the retainer mounting opening. The rotating disk 106 can press six needle rollers at the same time. Then, the handle 1041 is reversed to reset the rotating disk 106. At this time, the gap of the groove 1061 becomes larger, the spring 109 returns to its original state, and the ejector pin 108 is pushed back to the initial position. Then, the first motor 102 is started, so that the rotating rod 103 rotates through the angle of the retainer mounting opening. The feeding assembly feeds the needle rollers again, and the ejector pin 108 presses in six needle rollers. This process is repeated to complete the assembly of the needle roller bearing.

[0042] The advantage of this solution lies in its design, which features six ejector pins 108 and corresponding feeding stations. This allows for the simultaneous feeding and pressing of all six needle rollers, significantly improving efficiency compared to traditional single-needle or manual assembly. Key steps such as feeding, sorting, delivery, and pressing are automated, reducing manual intervention time and ensuring a stable and rapid production cycle. After each pressing operation, the first motor 102 drives the cage to rotate precisely to the next station, enabling continuous, cyclical assembly, which is ideal for mass production. A single drive source handle 1041 (which can later be replaced with a motor) controls the rotating disk 106. The teardrop-shaped groove 1061 on the rotating disk 106 simultaneously and synchronously pushes all six ejector pins 108 towards the center, ensuring that the six needle rollers are pressed evenly and synchronously into the cage mounting holes with consistent force, preventing cage deformation or needle roller jamming caused by sequential pressing. The operator's main tasks can be simplified to placing the cage on the rotating rod 103, starting the equipment or turning the handle 1041 (this step can also be easily replaced with motor drive for full automation), and possible inspections. The heavy, repetitive, and meticulous needle roller placement and pressing work is entirely completed by the equipment. This reduces human error due to fatigue and also lowers the skill requirements for workers. By changing the rotating plate 106 (groove 1061 contour), fixed plate 107, ejector pin 108, and limit block 1081 of different specifications, it is theoretically possible to adapt to cage assemblies of different models and different numbers of needle rollers.

[0043] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape, and proportions of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), installation arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application. For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of the invention. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structurally equivalent but also equivalent in structure. Other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments without departing from the scope of the invention. Therefore, the present invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0044] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the currently considered best mode for carrying out the invention, or those features that are not relevant to implementing the invention) may be omitted.

[0045] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0046] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A needle roller bearing cage assembly device, characterized in that: include, The mounting assembly includes a mounting frame (101), a first motor (102) mounted on the mounting frame (101), a rotating rod (103) connected to the first motor (102), a horizontal plate (104) fixedly connected to the mounting frame (101), a mounting plate (105) fixedly connected to the horizontal plate (104), a rotating disk (106) disposed between the horizontal plate (104) and the mounting plate (105), a fixed disk (107) disposed within the rotating disk (106), a pin (108) and a spring (109) disposed on the fixed disk (107). The feeding assembly, mounted on the mounting frame (101), includes a telescopic cylinder (201), a ring (202) connected to the telescopic cylinder (201), a second motor (203) mounted on the ring (202), a drive rod (204) connected to the second motor (203), a transmission rod (205) rotatably connected to the drive rod (204), and a slider (206) mounted on the ring (202). The output shaft of the first motor (102) is fixedly connected to the rotating rod (103), the end of the rotating rod (103) is located at the ejector pin (108), and a retainer is fitted on the end of the rotating rod (103); A handle (1041) is rotatably provided on the horizontal plate (104). The horizontal plate (104), the fixed plate (107), and the mounting plate (105) are connected by threaded fastening. The fixed plate (107) is located between the horizontal plate (104) and the mounting plate (105).

2. The needle roller bearing cage assembly device as described in claim 1, characterized in that: The mounting plate (105) has six straight grooves (1051) evenly distributed around its circumference. The rotating disk (106) is sleeved on the fixed disk (107) and is rotatably connected to the fixed disk (107). The rotating disk (106) has a groove (1061) in the shape of a teardrop. A connecting rod (1062) is also connected to the rotating disk (106). One end of the connecting rod (1062) is rotatably connected to the rotating disk (106), and the other end is rotatably connected to the handle (1041).

3. The needle roller bearing cage assembly device as described in claim 2, characterized in that: The fixed plate (107) has a slot (1071) with the same shape as the straight groove (1051). There are six slots (1071), and the positions of the slots (1071) correspond one-to-one with the straight grooves (1051).

4. The needle roller bearing cage assembly device as described in claim 3, characterized in that: The ejector pins (108) are provided in six parts. The ejector pins (108) are slidably disposed in the slots (1071). The ejector pins (108) correspond one-to-one with the slots (1071). The ends of the ejector pins (108) are made of magnetic material. The ejector pins (108) are also provided with limiting blocks (1081). The limiting blocks (1081) are embedded in the straight grooves (1051). The limiting blocks (1081) correspond one-to-one with the straight grooves (1051) and are slidably connected to them.

5. The needle roller bearing cage assembly device as described in claim 4, characterized in that: The springs (109) are provided in six units. The springs (109) are located in the straight grooves (1051) and correspond one-to-one with the straight grooves (1051). One end of the spring (109) is fixedly connected to the inner wall of the straight groove (1051), and the other end is fixedly connected to the limiting block (1081).

6. The needle roller bearing cage assembly device as described in claim 5, characterized in that: The horizontal plate (104), the mounting plate (105), and the fixing plate (107) all have through holes in their centers, and the end of the rotating rod (103) is located inside the through hole.

7. The needle roller bearing cage assembly device as described in claim 6, characterized in that: The telescopic cylinder (201) is fixedly mounted on the mounting bracket (101). The telescopic end of the telescopic cylinder (201) is fixedly connected to the ring (202). The ring (202) has a slide rail (2021). The second motor (203) is fixedly mounted on the ring (202). The output shaft of the second motor (203) is fixedly connected to the drive rod (204). The drive rod (204) passes through the ring (202).

8. The needle roller bearing cage assembly device as described in claim 7, characterized in that: There are six transmission rods (205), and the transmission rods (205) are rotatably connected to each other in pairs. The center of the transmission rod (205) is rotatably connected to the slider (206). The slider (206) is slidably disposed in the slide rail (2021). The top of the slider (206) is provided with an insertion groove (2061).

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