Vacuum tube bearing ball filling device and ball filling sleeve method

Abstract

The application provides a vacuum tube bearing ball filling device, which comprises a ball filling outer sleeve and a ball filling inner sleeve, the ball filling outer sleeve and the ball filling inner sleeve are provided with a center hole, the ball filling outer sleeve and the ball filling inner sleeve are in a split type structure, the ball filling inner sleeve is inserted and installed in the center hole of the ball filling outer sleeve, the length of the ball filling inner sleeve is shorter than that of the ball filling outer sleeve, a communicating threaded hole is arranged on the outer peripheral wall of the ball filling outer sleeve and radially inward, a bolt is screwed in the threaded hole, after the ball filling inner sleeve and the ball filling outer sleeve are installed, the upper end surface of the ball filling inner sleeve is arranged at a vertical height lower than the position of the threaded hole, and the upper end surface of the ball filling inner sleeve is used for placing a bearing outer ring to be installed, the device has simple structure, convenient operation, can effectively guarantee the ball filling efficiency of the vacuum tube bearing, reduce the adverse rate of steel ball scratch caused by pure manual assembly, and the bolt provides the function of fixing the outer ring during the ball filling process.

Description

Technical Field

[0001] This invention relates to a ball-filling device for vacuum tube bearings and a method for assembling the ball-filling assembly. Background Technology

[0002] With the gradual localization of high-precision and special-shaped bearings, the requirements for special bearings in medical device fields or key project development are becoming increasingly stringent, such as their application in special fields, special occasions, and special functions. Some special-shaped full-ball bearings face various challenges in clearance detection during the production process. Under certain working conditions, it is required that the radial clearance of the finished product meets the usage requirements, and that the axial clearance can still operate normally under temperature rise conditions during high-speed operation.

[0003] In the medical device field, vacuum tube bearings are required for specialized applications. However, due to the limited ball-filling space and small locking amount of the bearing rings during assembly, they are prone to disintegration. Furthermore, the steel balls themselves are easily scratched due to their plating, creating significant obstacles during assembly. This results in a low product yield or failure to meet clearance accuracy requirements after assembly. Consequently, the functional precision and stability of the finished product cannot be guaranteed, leading to various quality problems under high-speed rotation (temperature changes) conditions after installation. Therefore, the design, fabrication, and use of the ball-filling device for vacuum tube bearings are particularly urgent and important. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a vacuum tube bearing ball filling device and a ball filling assembly method.

[0005] To achieve the above objectives, the present invention provides a ball-filling device for vacuum tube bearings, comprising a ball-filling outer sleeve and a ball-filling inner sleeve. Both the ball-filling outer sleeve and the ball-filling inner sleeve are provided with a central hole. The ball-filling outer sleeve and the ball-filling inner sleeve are separate structures. The ball-filling inner sleeve is inserted and installed by aligning it with the central hole of the ball-filling outer sleeve. The length of the ball-filling inner sleeve is shorter than the length of the ball-filling outer sleeve. The outer peripheral wall of the ball-filling outer sleeve is provided with a threaded hole that is radially inward. The threaded hole is threaded with a bolt. After the ball-filling inner sleeve and the ball-filling outer sleeve are installed, the upper end face of the ball-filling inner sleeve is positioned at a vertical height lower than the position of the threaded hole. The upper end face of the ball-filling inner sleeve is used to place the outer ring of the bearing to be installed.

[0006] Furthermore, the inner edge wall of the ball filling sleeve is provided with a first shoulder and a second shoulder at both axial ends. The first shoulder is located at the end near the threaded hole. During assembly, the first shoulder provides placement and positioning space for the snap ring in the bearing to be assembled. The second shoulder provides space for the bearing ring when filling the other side with steel balls and provides disassembly space when demolding.

[0007] Furthermore, the outer peripheral wall of the ball filling sleeve is provided with a plug filling port for providing filling space for the plug on the mandrel after ball filling is completed. The plug filling port is a semi-circular cut. The plug filling port and the threaded hole are located on both sides of the ball filling sleeve. The plug filling port is set lower than the threaded hole in the vertical direction.

[0008] Furthermore, the inner wall of the ball filling jacket is provided with a groove for the outer ring to be installed and fixed at an angle and for easy ball filling. The surface of the groove is covered with an elastic element for pressing and fixing the outer ring and preventing the outer ring from being scratched.

[0009] This invention uses a ball-filling outer sleeve and an inner sleeve to fill the two ends of a vacuum tube bearing. The inner sleeve provides positioning and support space for the balls, which facilitates better ball filling and prevents steel balls from scattering and wasting. The device operates on the principle of positioning and height limiting. It has a simple structure, is easy to operate, and effectively ensures the ball filling efficiency of the vacuum tube bearing, reducing the defect rate of steel ball scratches caused by manual assembly. The bolts provide a fixing angle for the outer ring during ball filling; they also provide a ball filling angle by fixing the tilt during ball filling, facilitating the entry of steel balls into the raceway and preventing steel ball scratches; and they play an auxiliary positioning role in adjusting the axial clearance of the bearing, preventing the bearing from falling apart. The structure of the ball-filling outer sleeve and inner sleeve is relatively simple, and the device can be changed from a manual device to an automatic device depending on the production batch size. The switching process only requires setting up a fixing frame and a flipping robot to meet the ball filling requirements.

[0010] Based on the above technology, a ball filling assembly method is provided, comprising the following steps: placing the ball filling outer sleeve on an assembly platform with the first shoulder facing upwards; placing the ball filling inner sleeve into the ball filling outer sleeve; stabilizing the placed ball filling inner sleeve and ball filling outer sleeve; placing one side of the outer ring of the vacuum tube bearing into the ball filling outer sleeve and locking it with bolts; then placing the retaining circlip from the vacuum tube bearing into the first shoulder of the ball filling outer sleeve; then placing the mandrel from the vacuum tube bearing into the assembled ball filling device; and then placing the steel ball using tweezers or a ball ejection device; lifting and flipping one side of the placed steel ball section to remove the ball filling outer sleeve and ball filling inner sleeve, and then reassembling the ball filling outer sleeve. The vacuum tube bearing is pre-assembled on one side. Then, the fitting sleeve from the vacuum tube bearing is placed into the ball filler sleeve. After assembling the other side of the vacuum tube bearing, the ball filler sleeve is placed inside and bolts are used to tighten it around the outer ring. Then, tweezers or a ball-feeding device are used to place the steel balls. The ball filler sleeve at one end of the pre-filled vacuum tube bearing is lifted, allowing the steel balls to enter the spindle raceway and outer ring raceway. Then, according to the clearance requirements of the vacuum tube bearing, a suitable size plug is selected and inserted through the filling port of the ball filler sleeve. After the entire assembly is completed, the bolts are loosened and the ball filler sleeve is removed. After assembly, the outer diameter and flexibility of the assembled bearing are checked; if they meet the process requirements, the assembly is complete.

[0011] The advantages of adopting the above technical solution are: it changes the installation method of the steel balls of the vacuum tube bearing, and places the outer ring of the bearing flat on the upper end face of the inner ball filling sleeve. By utilizing the principle of positioning and height limitation, as well as the tight fixing of the bolts on the outer ring, the outer ring can form a stable tilt angle during the ball filling process, so that the rollers can be assembled in an orderly and fast manner. This improves the assembly efficiency, reduces the inefficiency of purely manual labor, better ensures the assembly quality, reduces labor intensity, and better guarantees the assembly quality of the bearing. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the three-dimensional structure in an embodiment of the present invention; Figure 2 This is a cross-sectional structural diagram of an embodiment of the present invention; Figure 3 This is a schematic diagram of the assembled vacuum tube bearing in an embodiment of the present invention. Detailed Implementation

[0013] The embodiments of the present invention will be further described below with reference to the accompanying drawings: As shown in the figures, the vacuum tube bearing ball filling device includes a ball filling outer sleeve 1 and a ball filling inner sleeve 2. Both the ball filling outer sleeve 1 and the ball filling inner sleeve 2 are provided with a central hole. The ball filling outer sleeve 1 and the ball filling inner sleeve 2 are separate structures. The ball filling inner sleeve 2 is inserted and installed by aligning it with the central hole of the ball filling outer sleeve 1. The length of the ball filling inner sleeve 2 is shorter than the length of the ball filling outer sleeve 1. The outer peripheral wall of the ball filling outer sleeve 1 is provided with a threaded hole 3 that is radially inward. The threaded hole 3 is threadedly connected to a bolt 4. After the ball filling inner sleeve 2 and the ball filling outer sleeve 1 are installed, the upper end face of the ball filling inner sleeve 2 is positioned at a vertical height lower than the threaded hole 3. The upper end face of the ball filling inner sleeve 2 is used to place the bearing outer ring to be installed. The ball filling inner sleeve 2 is a cylindrical long tube with an outer diameter slightly smaller than the inner diameter of the ball filling outer sleeve 1.

[0014] The ball filler outer sleeve 1 and the ball filler inner sleeve 2 are designed as separate units, both made of copper to prevent damage to the bearing's appearance. The inner diameter of the ball filler outer sleeve 1 can be adjusted according to the bearing's outer diameter, and its length can be adjusted according to the assembly height of the vacuum tube bearing. The ball filler outer sleeve 1 has good versatility and is easy to manufacture. The length of the ball filler inner sleeve 2 is similar to the length of the sleeve in the vacuum tube bearing, providing support space for the ball filler, which facilitates better ball filling and prevents the steel balls from scattering and wasting. The inner edge wall of the ball filling sleeve 1 is provided with a first shoulder 5 and a second shoulder 6 at both axial ends. The first shoulder 5 is located at the end near the threaded hole 3. During the assembly process, the first shoulder 5 provides a placement space and positioning space for the snap ring in the bearing to be assembled. The second shoulder 6 provides space for the bearing ring when filling the other side of the steel ball and provides a disassembly space when demolding.

[0015] The outer peripheral wall of the ball-filling sleeve 1 is provided with a plug-filling opening 7 for providing filling space for the plug on the mandrel after ball filling. The plug-filling opening 7 is a semi-circular cut. The plug-filling opening 7 and the threaded hole 3 are located on both sides of the ball-filling sleeve 1. The plug-filling opening 7 is set lower than the threaded hole 3 in the vertical direction. The plug-filling opening 7 of the ball-filling sleeve 1 mainly provides filling space for the plug after ball filling and plays an auxiliary role in fixing the bearing clearance adjustment.

[0016] The inner wall of the ball filling jacket 1 is provided with a groove 8 for the outer ring to be installed and fixed at an angle and for easy ball filling. The surface of the groove 8 is covered with an elastic element 9 for pressing and fixing the outer ring and preventing the outer ring from being scratched.

[0017] A ball-filling assembly method, applied to a ball-filling device for vacuum tube bearings, characterized in that: The process includes the following steps: S1. Place the ball-filling jacket 1 on the assembly platform, with the first shoulder block 5 facing upwards; S2. Place the inner ball filling sleeve 2 into the outer ball filling sleeve 1; S3. Stabilize the placed inner ball sleeve 2 and outer ball sleeve 1. Place the outer ring of one side of the vacuum tube bearing into the outer ball sleeve 1 and lock it with bolt 4. Then place the accessory snap ring in the vacuum tube bearing into the first shoulder 5 of the outer ball sleeve 1. Then place the accessory mandrel in the vacuum tube bearing into the assembled ball filling device. Then place the steel ball using tweezers or a ball feeding device. S4. Lift and flip one side of the placed steel ball segment, take out the ball filling outer sleeve 1 and the ball filling inner sleeve 2, and put the ball filling outer sleeve 1 back onto the assembled section of the vacuum tube bearing. Then, put the accessory sleeve in the vacuum tube bearing into the ball filling outer sleeve 1. After assembling the other side of the vacuum tube bearing, put it into the ball filling outer sleeve 1 and use bolts 4 to lock the outer ring. Then, start using tweezers or a ball-spitting device to place the steel ball. S5. Lift the ball filling sleeve 1 at one end of the vacuum tube bearing semi-finished product with balls already loaded on both sides. The steel balls enter the mandrel raceway and the outer ring raceway. Then, according to the clearance requirements of the vacuum tube bearing, select a plug of appropriate size and fill it through the filling port of the ball filling sleeve 1. After the overall assembly is completed, loosen the bolt 4 and take out the ball filling sleeve 1. S6. After assembly, check the outer diameter and flexibility of the assembled bearings to ensure they meet the process requirements.

[0018] The above embodiments are merely one preferred embodiment of the present invention. Ordinary variations and substitutions made by those skilled in the art within the scope of the technical solution of the present invention are all included within the protection scope of the present invention.

Claims

1. A ball-filling device for vacuum tube bearings, characterized in that: The bearing includes a ball filler outer sleeve and a ball filler inner sleeve, both of which have a central hole. The ball filler outer sleeve and the ball filler inner sleeve are separate structures. The ball filler inner sleeve is inserted and installed by aligning it with the central hole of the ball filler outer sleeve. The length of the ball filler inner sleeve is shorter than the length of the ball filler outer sleeve. The outer peripheral wall of the ball filler outer sleeve has a threaded hole that is radially inward. The threaded hole is threaded with a bolt. After the ball filler inner sleeve and the ball filler outer sleeve are installed, the upper end face of the ball filler inner sleeve is positioned at a height lower than the threaded hole. The upper end face of the ball filler inner sleeve is used to place the bearing outer ring to be installed. The inner wall of the ball filler outer sleeve has a groove for tilting and fixing the outer ring and facilitating ball filling. The surface of the groove is covered with an elastic element for pressing and fixing the outer ring and preventing scratches on the outer ring.

2. The vacuum tube bearing ball filling device according to claim 1, characterized in that: The inner edge wall of the ball filling sleeve is provided with a first shoulder and a second shoulder at both axial ends. The first shoulder is located at the end near the threaded hole. During the assembly process, the first shoulder provides space for the snap ring in the bearing to be assembled and provides space for the bearing ring when filling the other side of the steel ball and for disassembly when demolding.

3. The vacuum tube bearing ball filling device according to claim 2, characterized in that: The outer peripheral wall of the ball filling sleeve is provided with a plug filling port for providing filling space for the plug on the mandrel after ball filling is completed. The plug filling port is a semi-circular cut. The plug filling port and the threaded hole are located on both sides of the ball filling sleeve. The plug filling port is set lower than the threaded hole in the vertical direction.

4. A ball-filling assembly method, applied to the ball-filling device for vacuum tube bearings according to any one of claims 1 to 3, characterized in that: The testing process includes the following: S1. Place the ball-filling jacket on the assembly platform with the first shoulder facing upwards; S2. Place the inner filling sleeve into the outer filling sleeve; S3. Stabilize the placed inner and outer ball filling sleeves. Place the outer ring of the vacuum tube bearing into the outer ball filling sleeve and tighten it with bolts. Then place the retaining ring of the vacuum tube bearing into the first shoulder of the outer ball filling sleeve. Then place the mandrel of the vacuum tube bearing into the assembled ball filling device. Then place the steel ball using tweezers or a ball feeding device. S4. Lift and flip one side of the placed steel ball segment, take out the ball filling outer sleeve and the ball filling inner sleeve, and put the ball filling outer sleeve back onto the assembled section of the vacuum tube bearing. Then, put the accessory sleeve in the vacuum tube bearing into the ball filling outer sleeve. After assembling the other side of the vacuum tube bearing, put it into the ball filling outer sleeve and use bolts to lock the outer ring. Then, start using tweezers or a ball-spitting device to place the steel ball. S5. Lift the ball-filling outer sleeve at one end of the semi-finished vacuum tube bearing with balls already loaded on both sides. The steel balls enter the mandrel raceway and the outer ring raceway. Then, according to the clearance requirements of the vacuum tube bearing, select a plug of appropriate size and fill it through the filling port of the ball-filling outer sleeve. After the overall assembly is completed, loosen the bolts and remove the ball-filling outer sleeve. S6. After assembly, check the outer diameter and flexibility of the assembled bearings to ensure they meet the process requirements.

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