Knuckle bearing closing-in device with reducing function

Abstract

The utility model provides a knuckle bearing necking device with a reducing function, comprising: a base which is placed on a working platform of a machine tool, is fixed by a pressing plate and is provided with a central hole; one end of the taper shank is fixedly connected with the main shaft; the three-jaw chuck is connected with the other end of the taper shank, and the three-jaw chuck is provided with a movable clamping jaw; wherein the three-jaw chuck is rotated clockwise or anticlockwise to adjust the specification size of the bearing shell nosing, and the size of the bearing shell nosing is adjusted clockwise to be smaller and anticlockwise to be larger; the outer circle of the upper end part of the positioning mandrel is clamped by the three-jaw chuck, and the lowermost end of the positioning mandrel is inserted into the central hole of the base, so that the centers of the main shaft, the bearing inner ring and the base are determined to be on the same central axis; the fixed sleeve is connected with the movable clamping jaw; the steel ball is arranged in the fixing sleeve; the rolling closing-in device is improved according to the three-jaw principle, and the variable diameter function of the bearing closing-in device is achieved.

Description

Technical Field

[0001] This application belongs to the field of machining technology, specifically relating to a joint bearing end-closing device with variable diameter function. Background Technology

[0002] Traditional spherical plain bearing end-capping device design involves matching the bearing specifications with the steel balls according to requirements and then designing a one-to-one dedicated tooling. This results in a wide variety of specifications, high manufacturing and management costs, long manufacturing cycles, and impacts production delivery schedules. Utility Model Content

[0003] The purpose of this utility model is to match bearing specifications and steel balls within the standard requirements, and to improve the design of the rolling and closing device by using the three-jaw principle. This realizes the variable diameter function of the bearing closing device and can obtain advantages in tooling design, manufacturing quality, cost, and cycle.

[0004] This application provides a joint bearing end-closing device with a variable diameter function, the device comprising:

[0005] The base is placed on the machine tool work platform and fixed by a pressure plate. The base has a central hole.

[0006] A tapered shank, one end of which is connected and fixed to the main shaft;

[0007] A three-jaw chuck is connected to the other end of the tapered shank, and the three-jaw chuck has movable jaws; wherein, rotating the three-jaw chuck clockwise or counterclockwise adjusts the size of the bearing opening, with clockwise rotation decreasing the size and counterclockwise rotation increasing the size.

[0008] The positioning mandrel has its upper outer circle held by the three-jaw chuck, and its lowermost end inserted into the center hole of the base, so that the centers of the main shaft, the inner ring of the bearing, and the base are all on the same central axis.

[0009] The fixed sleeve is connected to the movable claw;

[0010] A steel ball is disposed within the fixed sleeve.

[0011] Preferably, the three-jaw chuck has three movable jaws, the end faces of which have inner holes, and the fixing sleeve is disposed in the inner holes.

[0012] Preferably, the fixing sleeve is interference-fitted with the inner hole.

[0013] Preferably, the fixing sleeve has an inner chamfer design, and the three steel balls are kept on the same plane.

[0014] Preferably, the three-jaw chuck further includes a chuck body and a jaw drive mechanism. The guide portions of the three jaws on the three-jaw chuck have threads that mesh with the planar threads on the back of the disc bevel gear. When the small bevel gear is rotated through the square hole with a wrench, the disc gear rotates, and the planar threads on the back simultaneously drive the three jaws to move closer to or out of the center, thereby clamping the workpiece.

[0015] Preferably, the spindle is a machine tool spindle.

[0016] This application has the following technical effects:

[0017] To address the different bearing end-closing requirements, this application employs a three-jaw principle for rolling end-closing device design, achieving a variable diameter structure, reducing the types of special tooling, lowering tooling manufacturing and management costs, significantly shortening the manufacturing cycle, ensuring product delivery schedule, and meeting the technical specifications required for different specifications in the HB 0-37-2003 standard. Attached Figure Description

[0018] Figure 1 This is a partial structural schematic diagram of a joint bearing end-closing device with variable diameter function provided in an embodiment of this application;

[0019] Figure 2 This is a cross-sectional view of a joint bearing end-closing device with variable diameter function provided in an embodiment of this application;

[0020] Figure 3 This is a schematic diagram of a joint bearing end-closing device with variable diameter function provided in an embodiment of this application;

[0021] The components include: 1. base; 2. positioning mandrel; 3. connector assembly; 4. three-jaw chuck; 5. tapered shank; 6. steel ball; and 7. fixing sleeve. Detailed Implementation

[0022] Please see Figures 1-3 Based on the bearing end-forming standard HB0-37-2003, this application designs a device that meets the requirements of HB0-37-1 and HB0-37-2 for steel ball annular rolling end forming. Furthermore, the device, through serialized design, meets the application range of housing bore diameters from φ14 to φ100 mm that cover the requirements of HB0-37-2003.

[0023] This application involves matching bearing specifications and steel balls within the standard requirements and improving the design of the rolling and closing device using the three-jaw principle. This design enables the bearing closing device to have a variable diameter function, and provides advantages in tooling design, manufacturing quality, cost, and cycle time.

[0024] The technical solution of this application is:

[0025] 1. The closing device adopts a tapered shank design and is connected to the spindle of the radial drilling machine. The rotation of the machine spindle drives the rotation of the device, and the radial arm presses down to perform the bearing closing work, which effectively ensures the rigidity between the machine tool and the connecting closing device.

[0026] 2. The steel ball and the lower surface of the three-jaw jack are fixedly connected by interference fit. The fixing sleeve has an inner chamfer design. The standard bearing is placed in the fixing sleeve. The outer circle dimension accuracy of the fixing sleeve and the end hole diameter of the three-jaw jack meet the interference fit of 0.02~0.03mm for press-fit fixation (temperature difference method).

[0027] The installation and fixing requirements for the three steel balls are consistent, ensuring that the three points of the three steel balls are on the same plane. Figure 1 As shown.

[0028] 3. Before closing the end, first fix the base of the closing device to the platform, then place the connector assembly on the base, and adjust the position and connect the three claws and the base through the positioning mandrel.

[0029] 4. The bearing end-capping specifications can be controlled by machine tool parameters. Specifically, the machine tool speed should be controlled between 50 and 80 r / min, and the steel ball rolling depth should be performed according to the standard (visually observe the downward displacement scale line of the machine tool spindle during processing). When the downward pressure standard requirement is visually observed, a 3-5 second pressure holding operation should be performed to ensure that the material at the end of the housing undergoes complete plastic deformation and that the housing flange material completely wraps around the bearing ring.

[0030] 5. According to the HB0-37-2003 standard, bearings of different specifications and sizes require matching steel balls of different sizes. Therefore, the device can be designed in series according to its adjustment range to meet product requirements.

[0031] 6. The three-jaw chuck, positioning spindle, and steel ball are designed in a series.

[0032] 7. The size range of this device can be adjusted by manually tightening the three jaws to quickly clamp the positioning mandrel.

[0033] 8. The positioning mandrel is serialized. According to the standard requirements, the same size steel ball can be used for different bearing diameters. The required bearing diameter is converted into the outer diameter of the positioning mandrel. The positioning mandrel connects the components and the three-jaw chuck for positioning and sizing.

[0034] 9. This device can be further serialized to meet the application range of housing bore diameter φ14~φ100mm as required by HB0-37-2003.

[0035] To address the different bearing end-closing requirements, a rolling end-closing device based on the three-jaw principle was designed, realizing a variable diameter structure, reducing the types of special tooling, lowering tooling manufacturing and management costs, greatly shortening the manufacturing cycle, ensuring product delivery schedule, and meeting the technical specifications of different specifications in the HB 0-37-2003 standard.

[0036] The key technology lies in the use of a three-jaw chuck that can automatically center and adjust the size, and the design of a structure that can adjust the bearing end range. The steel balls, positioning mandrels and three-jaw chucks are all designed in a series to meet the end range requirements of different bearing specifications in HB 0-37-2003.

[0037] In other embodiments of this application, the structural diagram of the device is as follows: Figure 2 As shown, this bearing end-receiving device realizes the function of variable diameter bearing end-receiving device. First, the base 1 of the variable diameter end-receiving device is placed on the machine tool work platform and fixed with a pressure plate.

[0038] The taper shank 5 is connected and fixed to the spindle, and the other end of the taper shank is connected and installed to the three-jaw chuck 4. Rotating the three-jaw chuck 4 clockwise or counterclockwise can adjust the size of the bearing end; clockwise adjusts to smaller, counterclockwise adjusts to larger. The three-jaw chuck 4 clamps the upper outer circle of the positioning mandrel 2. The selection of a series of positioning mandrels directly determines the size of the bearing end. The positioning mandrel 2 continues to pass through the bearing inner ring of the connector assembly 3. The lowest end of the positioning mandrel 2 is inserted into the center hole of the base 1, so that the centers of the spindle, the bearing inner ring, and the base are on the same central axis. At this time, the machine tool rocker arm is pressed down, and the position of the base 1 in the X / Y direction is finely adjusted so that the lower end of the positioning mandrel 2 is inserted into the positioning hole of the base 1. The end-closing connector assembly 3 can rotate flexibly when swung horizontally. The pressure plate is pressed and fixed to the base 1 again. At this time, the installation, fixing, and adjustment of the end-closing device, the end-closing object, and the machine tool are completed. See the 3D diagram. Figure 3 .

[0039] The three-jaw chuck mainly consists of a chuck body, movable jaws, and a jaw drive mechanism. On the underside of the guide parts of the three jaws on the three-jaw chuck, there are threads that mesh with the flat threads on the back of the disc bevel gear. When the small bevel gear is rotated through the square hole with a wrench, the disc gear rotates, and the flat threads on the back simultaneously drive the three jaws to move closer to or out of the center, thereby clamping the workpiece.

Claims

1. A joint bearing end-closing device with variable diameter function, characterized in that, The device includes: The base is placed on the machine tool work platform and fixed by a pressure plate. The base has a central hole. A tapered shank, one end of which is connected and fixed to the main shaft; A three-jaw chuck is connected to the other end of the tapered shank, and the three-jaw chuck has movable jaws; wherein, rotating the three-jaw chuck clockwise or counterclockwise adjusts the size of the bearing opening, with clockwise rotation decreasing the size and counterclockwise rotation increasing the size. The positioning mandrel has its upper outer circle held by the three-jaw chuck, and its lowermost end inserted into the center hole of the base, so that the centers of the main shaft, the inner ring of the bearing, and the base are all on the same central axis. The fixed sleeve is connected to the movable claw; A steel ball is disposed within the fixed sleeve.

2. The apparatus according to claim 1, characterized in that, The three-jaw chuck has three movable jaws, the end faces of which have inner holes, and the fixed sleeve is disposed in the inner holes.

3. The apparatus according to claim 2, characterized in that, The fixing sleeve is interference-fitted with the inner hole.

4. The apparatus according to claim 3, characterized in that, The fixing sleeve has an inner chamfer design, and the three steel balls are kept on the same plane.

5. The apparatus according to claim 4, characterized in that, The three-jaw chuck also includes a chuck body and a jaw drive mechanism. The three jaw guide parts on the three-jaw chuck have threads that mesh with the flat threads on the back of the disc bevel gear. When the small bevel gear is rotated through the square hole with a wrench, the disc gear rotates, and the flat threads on the back simultaneously drive the three jaws to move closer to or out of the center, thereby clamping the workpiece.

6. The apparatus according to claim 1, characterized in that, The spindle is a machine tool spindle.

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