Quick needle mounting tool platform based on externally mounted needle bearing
By designing a rapid needle loading fixture platform, and utilizing a vibratory feeder and a lever-based pressure plate to automatically load needle rollers into the cage, the problems of low needle loading efficiency and high cost in existing technologies are solved, achieving efficient and low-cost needle roller bearing assembly.
Patent Information
- Application Number
- CN202511953104.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-23
- Publication Date
- 2026-02-24
AI Technical Summary
Existing needle roller bearings have low needle loading efficiency and high cost. Manual needle loading is labor-intensive, while fully automatic needle loading equipment is expensive and can easily damage the equipment and cage.
Design a rapid needle loading fixture platform that includes a needle roller feeding mechanism and a needle roller pressing mechanism. The platform utilizes a vibratory feeder to automatically feed the needle rollers, and a needle pressing plate based on the lever principle enables the automatic loading of the needle rollers into the cage. It is equipped with adjustable mounting blocks and positioning columns to improve accuracy and versatility.
It improves needle loading efficiency, reduces labor intensity and production costs, and enhances the versatility and accuracy of assembling different types of bearings.
Smart Images
Figure CN121552033A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to a bearing pin mounting device, and more particularly to a pin mounting fixture platform for externally mounted needle roller bearings, belonging to the field of needle roller bearing assembly technology. Background Technology
[0002] Currently, needle roller bearing assembly primarily relies on manual methods, with a small number utilizing fully automated assembly equipment. Manual assembly typically involves operators using auxiliary tools such as needle-nose pliers and adhesive media like grease or petroleum jelly to clamp and adhere the needle rollers one by one into the mounting holes of the needle roller bearing cage. This method is not only inefficient but also labor-intensive. While fully automated assembly equipment offers high efficiency, it is also quite expensive, significantly increasing production costs. Furthermore, situations involving stuck or broken needles can cause substantial damage to both the equipment and the cage. Summary of the Invention
[0003] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a rapid needle loading tooling platform based on externally mounted needle roller bearings that can not only improve needle loading efficiency and reduce labor intensity, but also reduce production costs.
[0004] To solve the above-mentioned technical problems, the present invention employs a rapid needle loading fixture platform based on externally mounted needle roller bearings, comprising a needle roller feeding mechanism, a needle roller pressing mechanism, and a worktable; the needle roller feeding mechanism includes a vibratory feeder and a linear track for conveying needle rollers, the vibratory feeder being mounted on the worktable, and the inlet of the linear track being connected to the outlet of the vibratory feeder; the needle roller pressing mechanism includes a cylinder, a mounting block, a pressing plate, a rocker arm, a top block, a return spring, a cage positioning column, a side plate, and a bottom plate; the cylinder has an upper column with a large diameter section and a lower column with a small diameter section. An axially oriented, radially open slot is formed on the cylinder, penetrating both the upper and lower cylinders. A radially oriented pusher slot is formed on the lower cylinder, communicating with the axially oriented slot and located on the opposite side of the slot. An axially oriented needle inlet hole is formed on the cylinder, penetrating the upper cylinder and communicating with the pusher slot of the lower cylinder. The outlet of the linear track is connected to the needle inlet hole via a pipe. The mounting block is rectangular and has a vertically arranged through hole and a rectangular groove communicating with the through hole. The upper cylinder slides in conjunction with the through hole. The cylinder is fixed to the lower part of the through hole by set screws on the mounting block. The lower column of the cylinder extends out of the through hole and is located below the mounting block. The pressure plate has a vertically arranged vertical plate and a horizontally arranged horizontal plate. The pressure plate is embedded in the opening groove of the cylinder, with the vertical plate opposite to the rectangular groove and the horizontal plate opposite to the push needle groove. The body of the pressure plate is rotatably connected to the upper column. The rocker arm has a vertically arranged vertical tube and a horizontally arranged horizontal tube. The horizontal tube of the rocker arm passes through the upper part of the through hole and is rotatably connected to the mounting block. The top block has... The top block is fixedly fitted onto the horizontal tube and abuts against the inner side of the vertical plate. The return spring is embedded in the rectangular groove, with one end abutting against the outer side of the vertical plate and the other end abutting against the bottom surface of the rectangular groove. The retainer positioning post has an upper cylinder with a small diameter section and a lower cylinder with a large diameter section. The retainer positioning post is mounted on the base plate, with the upper cylinder arranged opposite to the push pin groove. The mounting block is mounted on the side plate, and the side plate is fixedly connected to the base plate. The base plate is mounted on the worktable.
[0005] In a preferred embodiment of the present invention, at least one vertically arranged first oblong groove is provided on the side plate, and at least two vertically spaced first screw holes are provided on the mounting block. The mounting block is vertically and height-adjustably fixedly mounted on the side plate by screws that pass through the first oblong groove and are screwed into the first screw holes. A horizontally arranged second oblong groove is provided on the bottom plate, and a vertically arranged second screw hole is provided at the bottom of the lower cylinder of the retainer positioning post. The retainer positioning post is horizontally and front-backly fixedly mounted on the bottom plate by screws that pass through the second oblong groove and are screwed into the second screw hole.
[0006] In a preferred embodiment of the present invention, the needle roller feeding mechanism further includes a linear vibrator, which is mounted on the worktable, and the linear track is mounted on the vibration table surface of the linear vibrator.
[0007] In a preferred embodiment of the present invention, the linear track has a needle feeding groove arranged along the length direction, and the cross-section of the needle feeding groove is rectangular or semi-circular.
[0008] In a preferred embodiment of the present invention, a radially positioned hole arranged in a horizontal direction and a horizontal pin inserted into the radially positioned hole are provided on the upper cylinder of the cage positioning post. The size of the radially positioned hole and the horizontal pin are adapted to the needle loading window of the needle roller bearing cage.
[0009] In a preferred embodiment of the present invention, three arc-shaped positioning blocks are provided on the upper cylinder of the cage positioning post, which are evenly distributed along the outer wall surface. The distance between the arc-shaped positioning blocks and the needle roller bearing cage is equal to the distance between the inner ring of the needle roller bearing and the needle roller bearing cage.
[0010] By adopting the above structure, the present invention has the following beneficial effects: In operation, the vibratory feeder automatically transports the needle rollers one by one onto a linear track. The needle rollers enter the needle inlet hole of the cylinder through the exit of the linear track and stand upright in the needle pusher groove of the cylinder. The operator rotates a rocker arm, utilizing the lever principle, to push the vertical plate of the pressure plate through a top block mounted on the rocker arm. This causes the horizontal plate of the pressure plate to move forward, pushing the needle roller in the pusher groove into the needle loading window of the needle roller bearing cage, completing the installation of a single needle roller. The operator then rotates the cage to align the next needle loading window with the pusher groove, and continues rotating the rocker arm to complete the installation of the next needle roller, and so on until all the needle rollers in the needle roller bearing cage are installed. This invention utilizes the rotational movement of the pressure plate of the needle roller pressing mechanism to install the needle rollers into the needle loading window of the needle roller bearing cage, significantly improving needle loading efficiency, reducing the labor intensity of the operator, and offering a simple structure and easy manufacturing, resulting in a significant reduction in production costs compared to fully automatic needle loading equipment.
[0011] This invention utilizes the automatic feeding characteristics of a vibratory feeder to continuously feed needle rollers into the needle roller pressing mechanism, ensuring the continuity of the needle roller pressing mechanism during needle loading and improving the feeding efficiency of the needle rollers.
[0012] The mounting block of this invention is vertically and vertically fixedly mounted on the side plate by a screw that passes through the first oblong groove and is screwed into the first screw hole. The cage positioning post is horizontally and horizontally fixedly mounted on the base plate by a screw that passes through the second oblong groove and is screwed into the second screw hole. This structure facilitates the vertical movement of the mounting block on the side plate and the horizontal movement of the cage positioning post on the base plate, further improving the needle loading efficiency and accuracy.
[0013] The present invention features a linear vibrator with a linear track mounted on the vibrating table of the linear vibrator, which further improves the needle feeding efficiency and accuracy.
[0014] The present invention provides a horizontally arranged radial positioning hole and a horizontal pin inserted into the radial positioning hole on the upper cylinder of the cage positioning post. In this way, simply inserting the horizontal pin through the needle loading window of the needle roller bearing cage into the radial positioning hole ensures that the needle loading window of the needle roller bearing cage is aligned with the needle pusher groove, thereby further improving the needle loading accuracy.
[0015] This invention features three evenly distributed arc-shaped positioning blocks along the outer wall of the upper cylinder of the cage positioning post. The distance between the arc-shaped positioning blocks and the needle roller bearing cage is equal to the distance between the inner ring of the needle roller bearing and the needle roller bearing cage. This structure allows the needle roller bearing cage to be more accurately fitted onto the upper cylinder, further improving the accuracy of needle installation.
[0016] This invention can be adapted to assemble needle rollers of the same size with bearings of different models, enhancing the versatility and interchangeability when assembling different types of bearings. For needle rollers of different sizes, only the corresponding cylinder and pressure plate need to be replaced. This structure significantly reduces production costs and enhances the ease of needle installation for needle rollers of different sizes. Attached Figure Description
[0017] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.
[0018] Figure 1 This is a schematic diagram of a quick needle-loading tooling platform based on an externally mounted needle roller bearing, according to the present invention.
[0019] Figure 2 This is a schematic diagram of one structure of the needle roller pressing mechanism in this invention.
[0020] Figure 3 for Figure 2 An explosion diagram.
[0021] Figure 4 This is a front-view perspective view of the cylinder in this invention.
[0022] Figure 5 This is a side-view perspective of the cylinder in this invention.
[0023] Figure 6 This is a schematic diagram of a preferred embodiment of the cage positioning post in this invention.
[0024] Figure 7 This is a schematic diagram of the working process of the roller needles falling upright in the pusher groove in this invention.
[0025] Figure 8 This is a schematic diagram illustrating the working process of the horizontal plate of the pressure needle plate in this invention pushing the roller needle at the needle pusher groove into the needle loading window hole. Detailed Implementation
[0026] See Figures 1 to 8The illustrated rapid needle loading fixture platform based on externally mounted needle roller bearings includes a needle roller feeding mechanism 1, a needle roller pressing mechanism 2, and a worktable 3. The needle roller feeding mechanism 1 includes a vibratory feeder 1-1 and a linear track 1-2 for conveying needle rollers 6. The vibratory feeder 1-1 is fixedly mounted on the worktable 3 by bolts, and the inlet 1a of the linear track 1-2 is connected to the outlet 1b of the vibratory feeder 1-1. The needle roller pressing mechanism 2 includes a cylinder 2-1, a mounting block 2-2, and a pressing plate. 2-3, rocker arm; 2-4, top block; 2-5, return spring; 2-6, retainer positioning post; 2-7, side plate; 2-8, and bottom plate; the cylinder 2-1 has an upper cylinder 2a with a large diameter section and a lower cylinder 2b with a small diameter section. An opening groove 2c is formed on the cylinder 2-1, axially arranged and radially open, penetrating the upper cylinder 2a and the lower cylinder 2b, as shown in the figure. The opening groove 2c is arranged horizontally and faces rearward. A radially arranged groove is formed on the lower cylinder 2b and... A pusher groove 2d is provided on the opposite side of the opening groove 2c, and is located in front of the opening groove 2c. An inlet hole 2e is provided on the cylinder 2-1, which is axially oriented, penetrates the upper cylinder 2a, and communicates with the pusher groove 2d of the lower cylinder 2b. The inlet hole 2e is located in front of the opening groove 2c. Preferably, the inlet hole 2e does not penetrate the lower cylinder 2b, but only communicates with the pusher groove 2d. However, it can also penetrate the lower cylinder 2b. If it does, it only needs to be in the lower cylinder 2-1. A radial rectangular groove 2b-1 is formed at the bottom of the roller 6, which is connected to the push needle groove 2d and the opening groove 2c. A stop block 12 is inserted at one end of the radial rectangular groove 2b-1 located at the bottom of the push needle groove 2d. This prevents the roller needle 6 from falling out of the push needle groove 2d. The outlet 1c of the linear track 1-2 is connected to the needle inlet 2e through the pipe 4. The pipe 4 is preferably made of a sheathed tension spring. The sheathed tension spring is made of stainless steel spring steel. The inner diameter of the sheathed tension spring is 1.2 to 1.8 times the diameter of the roller needle 6, and the wire diameter of the sheathed tension spring is 0.6 to 0.8mm, the upper end of the sheath spring is connected to the outlet 1c of the linear track 1-2, and the lower end of the sheath spring is connected to the needle inlet 2e. The pipe 4 can also be made of metal or plastic. The mounting block 2-2 is rectangular and has a vertically arranged through hole 2f and a rectangular groove 2g that penetrates the through hole 2f. The through hole 2f is located in front of the rectangular groove 2g. The upper column 2a of the cylinder 2-1 slides with the through hole 2f and is fixed to the lower part of the through hole 2f by a set screw 7 on the mounting block 2-2. The lower column 2b of the cylinder 2-1 extends out of the through hole 2f and is located below the mounting block 2-2. To make the installation of the pipe 4 more reliable, the present invention also provides an L-shaped connecting plate 8. One end of the connecting plate 8 is fixed to the front side of the mounting block 2-2 by a screw. The middle part of the pipe 4 is inserted into the other end of the connecting plate 8 and fixed by a set screw. The pressure plate 2-3 has a vertically arranged vertical plate 2h and a horizontally arranged horizontal plate 2i. The pressure plate 2-3 is embedded in the opening groove 2c of the cylinder 2-1, with the vertical plate 2h opposite to the rectangular groove 2g and the horizontal plate 2i opposite to the push needle groove 2d. The plate body of the pressure plate 2-3 is rotatably connected to the upper column 2a by a pin 9 that passes vertically through the opening groove 2c. The rocker arm 2-4 has a vertically arranged vertical tube 2j and a horizontally arranged horizontal tube 2k. The horizontal tube 2k of the rocker arm 2-4 passes through the upper part of the through hole 2f and is connected to the mounting block 2-2. The rotating connection, as shown in the figure, has the horizontal tube 2k located above the upper column 2a. Preferably, a nut 10 or cotter pin is installed at the outer end of the horizontal tube 2k to better prevent the rocker arm 2-4 from slipping out of the through hole 2f during rotation. The top block 2-5 has an outwardly protruding protrusion 2m. The top block 2-5 is fixedly mounted on the horizontal tube 2k by a set screw 11, and the protrusion 2m abuts against the inner side of the vertical plate 2h. The return spring 2-6 is embedded in the rectangular groove 2g, with one end abutting against the outer side of the vertical plate 2h and the other end abutting against the bottom surface of the rectangular groove 2g. Preferably, a blind hole is provided on the bottom surface of the rectangular groove 2g, and the other end of the return spring 2-6 abuts against the bottom of the blind hole. The retainer positioning post... 2-7 has an upper cylinder 2n with a small diameter section and a lower cylinder 2p with a large diameter section. The upper cylinder 2n is preferably a hollow circular tube, but it can also be a solid cylinder. During operation, the needle roller bearing cage 5 is fitted onto the upper cylinder 2n. Preferably, the height of the upper cylinder 2n is 3-5mm lower than the height of the needle roller bearing cage 5, which facilitates the operator's observation of the needle roller 6 installation. The cage positioning post 2-7 is bolted to the base plate 2-9, and the upper cylinder 2n is arranged opposite to the pusher groove 2d. The mounting block 2-2 is bolted to the side plate 2-8. The side plate 2-8 is fixedly connected to the base plate 2-9 by bolts. The base plate 2-9 is fixedly mounted to the worktable 3 by bolts.
[0027] As a preferred embodiment of the present invention, such as Figure 2 , Figure 3 As shown, at least one vertically arranged first oblong groove 2r is provided on the side plate 2-8, preferably two. At least two first screw holes are provided on the mounting block 2-2, which are not shown in the figure. The mounting block 2-2 is fixedly mounted on the side plate 2-8 in a vertically adjustable manner by screws 13 that pass through the first oblong groove 2r and are screwed into the first screw holes. A horizontally arranged second oblong groove 2s is provided on the bottom plate 2-9. A second screw hole is provided at the bottom of the lower cylinder 2p of the retainer positioning post 2-7 in a vertically arranged manner. The retainer positioning post 2-7 is fixedly mounted on the bottom plate 2-9 in a horizontally adjustable manner by screws 14 that pass through the second oblong groove 2s and are screwed into the second screw hole.
[0028] As a preferred embodiment of the present invention, such as Figure 1 As shown, the needle roller feeding mechanism 1 also includes a linear vibrator 1-3, which is mounted on the worktable 3 via a connecting plate, and the linear track 1-2 is mounted on the vibration table surface 1d of the linear vibrator 1-3.
[0029] As a preferred embodiment of the present invention, such as Figure 1 As shown, the linear track 1-2 is elongated and has a needle feeding groove 1e arranged along its length. The cross-section of the needle feeding groove 1e is rectangular or semi-circular. During operation, the roller needles 6 are arranged one by one in the needle feeding groove 1e along the length.
[0030] As a preferred embodiment of the present invention, such as Figure 6 As shown, a radial positioning hole 2n-1 arranged horizontally and a horizontal pin 2n-2 inserted into the radial positioning hole 2n-1 are provided on the upper cylinder 2n of the cage positioning post 2-7. Preferably, the radial positioning hole 2n-1 and the push pin groove 2d are on the same vertical plane, and the two are arranged 180° opposite each other with the cylindrical surface of the upper cylinder 2n as a reference. The size of the radial positioning hole 2n-1 and the horizontal pin 2n-2 are adapted to the needle loading window 5a of the needle roller bearing cage 5.
[0031] As a preferred embodiment of the present invention, such as Figure 6As shown, three arc-shaped positioning blocks 2n-3 are evenly distributed along the outer wall surface on the upper cylinder 2n of the cage positioning post 2-7. Only one is shown in the figure. The distance between the arc-shaped positioning block 2n-3 and the needle roller bearing cage 5 is equal to the distance between the inner ring of the needle roller bearing and the needle roller bearing cage 5. Of course, the distance between the upper cylinder 2n and the needle roller bearing cage 5 can also be directly equal to the distance between the inner ring of the needle roller bearing and the needle roller bearing cage 5, or the outer diameter of the upper cylinder 2n can be 1~5mm smaller than the inner diameter of the needle roller bearing cage 5.
[0032] When this invention is in operation, see Figure 1 , Figure 7 , Figure 8 A batch of needle rollers 6 are poured into the vibratory feeder 1-1. The vibratory feeder 1-1 starts automatically and transports the needle rollers 6 one by one to the linear track 1-2. The needle rollers 6 enter the needle inlet 2e of the cylinder 2-1 through the outlet 1c of the linear track and the pipe 4, and stand upright at the push-needle groove 2d of the cylinder 2-1. The operator rotates the vertical tube 2j of the rocker arm 2-4. Using the lever principle, the top block 2-5 installed on the horizontal tube 2k of the rocker arm 2-4 pushes the vertical plate 2h of the pressure plate 2-3, causing the horizontal plate 2i of the pressure plate 2-3 to move forward and push the needle rollers 6 at the push-needle groove 2d into the needle loading window 5a of the needle roller bearing cage 5, thus completing the installation of a single needle roller. Then the operator rotates the cage 5 to align the next needle loading window 5a of the cage 5 with the push-needle groove 2d, and continues to rotate the rocker arm 2-4 to complete the installation of the next needle roller 6. This process is repeated to complete the installation of all the needle rollers in the needle roller bearing cage 5.
[0033] After trial use, the present invention has shown high needle loading efficiency, low labor intensity and production cost, and simple and compact structure, achieving good results.
Claims
1. A rapid needle-loading fixture platform based on externally mounted needle roller bearings, characterized in that: It includes a needle roller feeding mechanism (1), a needle roller pressing mechanism (2), and a worktable (3); The needle roller feeding mechanism (1) includes a vibratory plate (1-1) for conveying needle rollers and a linear track (1-2). The vibratory plate (1-1) is installed on the worktable (3). The inlet (1a) of the linear track (1-2) is connected to the outlet (1b) of the vibratory plate (1-1). The needle roller pressing mechanism (2) includes a cylinder (2-1), a mounting block (2-2), a pressing plate (2-3), a rocker arm (2-4), a top block (2-5), a return spring (2-6), a cage positioning post (2-7), a side plate (2-8), and a bottom plate (2-9).The cylinder (2-1) has an upper cylinder (2a) with a large diameter section and a lower cylinder (2b) with a small diameter section. An opening groove (2c) is formed on the cylinder (2-1) that is axially oriented, radially open, and penetrates both the upper cylinder (2a) and the lower cylinder (2b). A pusher groove (2d) is formed on the lower cylinder (2b) that is radially oriented, communicates with the opening groove (2c), and is located on the opposite side of the opening groove (2c). An inlet hole (2e) is formed on the cylinder (2-1) that is axially oriented, penetrates the upper cylinder (2a), and communicates with the pusher groove (2d) of the lower cylinder (2b). The outlet (1c) of the linear track (1-2) is connected to a pipe (4). The cylinder (2-1) is connected to the needle inlet (2e). The mounting block (2-2) is rectangular and has a vertically arranged through hole (2f) and a rectangular groove (2g) that communicates with the through hole (2f). The upper column (2a) of the cylinder (2-1) is slidably fitted with the through hole (2f) and fixed to the lower part of the through hole (2f) by a set screw on the mounting block (2-2). The lower column (2b) of the cylinder (2-1) extends out of the through hole (2f) and is located below the mounting block (2-2). The pressure plate (2-3) has a vertically arranged vertical plate (2h) and a horizontally arranged horizontal plate (2i). The pressure plate (2-3) is embedded in the cylinder (2-1). 1) The opening groove (2c) is located in which the vertical plate (2h) is arranged opposite to the rectangular groove (2g), and the horizontal plate (2i) is arranged opposite to the push needle groove (2d). The body of the pressure needle plate (2-3) is rotatably connected to the upper column (2a). The rocker arm (2-4) has a vertically arranged vertical tube (2j) and a horizontally arranged horizontal tube (2k). The horizontal tube (2k) of the rocker arm (2-4) passes through the upper part of the through hole (2f) and is rotatably connected to the mounting block (2-2). The top block (2-5) has an outwardly protruding protrusion (2m). The top block (2-5) is fixedly fitted on the horizontal tube (2k), and the protrusion (2m) abuts against the inner side of the vertical plate (2h). The return spring (2-6) is embedded in the rectangular groove (2g), with one end abutting against the outer side of the vertical plate (2h) and the other end abutting against the bottom surface of the rectangular groove (2g). The retainer positioning post (2-7) has an upper cylinder (2n) with a small diameter section and a lower cylinder (2p) with a large diameter section. The retainer positioning post (2-7) is mounted on the base plate (2-9), with the upper cylinder (2n) arranged opposite to the push pin groove (2d). The mounting block (2-2) is mounted on the side plate (2-8), and the side plate (2-8) is fixedly connected to the base plate (2-9). The base plate (2-9) is mounted on the worktable (3).
2. The rapid needle loading fixture platform based on externally mounted needle roller bearings according to claim 1, characterized in that: At least one vertically arranged first oblong groove (2r) is provided on the side plate (2-8), and at least two vertically spaced first screw holes are provided on the mounting block (2-2). The mounting block (2-2) is fixedly mounted on the side plate (2-8) in a vertically adjustable manner by screws that pass through the first oblong groove (2r) and are screwed into the first screw holes. A horizontally arranged second oblong groove (2s) is provided on the bottom plate (2-9), and a vertically arranged second screw hole is provided at the bottom of the lower cylinder (2p) of the retainer positioning post (2-7). The retainer positioning post (2-7) is fixedly mounted on the bottom plate (2-9) in a horizontally adjustable manner by screws that pass through the second oblong groove (2s) and are screwed into the second screw hole.
3. The rapid needle loading fixture platform based on externally mounted needle roller bearings according to claim 1, characterized in that: The needle roller feeding mechanism (1) also includes a linear vibrator (1-3), which is installed on the worktable (3), and the linear track (1-2) is installed on the vibration table (1d) of the linear vibrator (1-3).
4. The rapid needle loading fixture platform based on externally mounted needle roller bearings according to claim 1, characterized in that: The linear track (1-2) has a needle feeding groove (1e) arranged along its length, and the cross-section of the needle feeding groove (1e) is rectangular or semi-circular.
5. The rapid needle loading fixture platform based on externally mounted needle roller bearings according to any one of claims 1 to 4, characterized in that: A radial positioning hole (2n-1) arranged in a horizontal direction and a horizontal pin (2n-2) inserted into the radial positioning hole (2n-1) are provided on the upper cylinder (2n) of the cage positioning post (2-7). The size of the radial positioning hole (2n-1) and the horizontal pin (2n-2) are adapted to the needle loading window (5a) of the needle roller bearing cage (5).
6. The rapid needle loading fixture platform based on externally mounted needle roller bearings according to any one of claims 1 to 4, characterized in that: Three arc-shaped positioning blocks (2n-3) are provided on the upper cylinder (2n) of the cage positioning column (2-7) and are evenly distributed along the outer wall surface. The distance between the arc-shaped positioning blocks (2n-3) and the needle roller bearing cage (5) is equal to the distance between the inner ring of the needle roller bearing and the needle roller bearing cage (5).