A main shaft bearing locking nut fastening tool

Abstract

The utility model relates to a main shaft bearing locking nut fastening tool, including main shaft height adjusting unit and rotary force applying unit, the horizontal lower workbench surface is connected on the upper end of main shaft height adjusting unit, and the lower workbench surface center is equipped with through -hole, and the through -hole is positioned and is connected main shaft, the upper workbench surface is equipped with above the lower workbench surface, and the main shaft is from the upper workbench surface center and goes out, and a plurality of pull claws are equipped on the upper workbench surface lower surface, and the pull claw is with the locking nut outer circle cooperation of main shaft, and the lower surface of mounting platform is equipped with pulley block, and pulley block is with the upper surface contact of upper workbench surface, and along the main shaft axis rotation, the rotary force applying unit is fixed on the mounting platform, and the power output end is connected with the pull claw cooperation and cooperation. This tool is through the rotary force mechanism fastening locking nut, and the size of pull claw is adjusted simultaneously through the adjustment locking nut outer diameter that can fasten, not only assembly efficiency is high, and when can adjust the locking nut of front and rear bearing simultaneously one time installation and adapt different type main shaft, and the adaptability is wider.

Description

Technical Field

[0001] This utility model relates to a locking nut fastening fixture for a spindle bearing, belonging to the technical field of machine tool spindle assembly equipment. Background Technology

[0002] Preloading of a spindle bearing refers to the process of pre-deforming the rolling elements and inner and outer rings of the bearing after it has been installed in the bearing housing and on the shaft, maintaining a compressed state between the inner and outer rings. The main functions of bearing preloading include: reducing noise, compensating for wear during operation, improving shaft guidance accuracy, increasing rigidity, and extending service life. Preloading reduces shaft deflection under stress, thus improving shaft guidance accuracy. Bearing clearance increases due to wear during operation, which can be compensated for by preloading. It also improves rigidity; preloaded bearings exhibit less elastic deformation under load within a certain range compared to unpreloaded bearings. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide a spindle bearing locking nut fastening fixture. This fixture fastens the locking nut by rotating the force application mechanism, and at the same time adjusts the outer diameter of the locking nut by adjusting the size of the pull claw. It not only has high assembly efficiency, but also can adjust the locking nuts of the front and rear bearings at the same time during one installation and adapt to different types of spindles, thus having wider adaptability.

[0004] To solve the above problems, the specific technical solution of this utility model is as follows: A spindle bearing locking nut fastening fixture includes a spindle height adjustment unit and a rotation force application unit; a horizontal lower worktable is connected to the upper end of the spindle height adjustment unit, and a through hole is provided in the center of the lower worktable, on which the spindle is positioned and connected; an upper worktable is provided above the lower worktable, through which the spindle passes; a plurality of pull claws are provided on the lower surface of the upper worktable, which engage with the outer circumference of the locking nut of the spindle; a pulley group is provided on the lower surface of the mounting platform, which contacts the upper surface of the upper worktable and rotates along the spindle axis; the rotation force application unit is fixed on the mounting platform, and its power output end is connected and engaged with the pull claws.

[0005] The spindle height adjustment unit includes a base, a lifting bracket, a slide rail, and a cylinder. The lifting bracket consists of two sets of support rods hinged in an X-shape. The upper end of one set of support rods is hinged to the lower surface of the lower worktable, and the lower end is slidably connected to the slide rail of the base. The upper end of the other set of support rods is slidably connected to the slide rail of the lower worktable, and the lower end is hinged to the base. A cylinder is fixedly connected to the side of the base, and the piston rod of the cylinder is connected to one set of support rods.

[0006] The rotary force application unit includes a rotary motor, a worm gear, and a worm. The worm gear is coaxially engaged with a through hole on the upper worktable via a bearing. The worm gear meshes with the worm, and the worm is coaxially connected to the output shaft of the rotary motor. A rotating plate is coaxially connected to the worm gear. Three pull claws are evenly distributed on the rotating plate via a rotating shaft. One end of each pull claw has a locking plate that engages with a groove on the outer circumference of a locking nut that mates with the main shaft. The other end of each pull claw has a locking tooth. Three positioning claws are connected to the rotating plate via a rotating shaft. The positions of the three positioning claws correspond to the positions of the pull claws. When the pull claws are in operation, the positioning claws engage with the locking teeth.

[0007] The base has rectangularly distributed anchor bolts at its bottom.

[0008] The spindle bearing locking nut fastening fixture of this application tightens the locking nut through a rotating force application mechanism. At the same time, the outer diameter of the locking nut can be adjusted by adjusting the size of the pull claw, and the working position of the spindle can be adjusted by a lifting device, which is convenient for personnel operation. It also allows the locking nuts of the front and rear bearings to be adjusted at the same time during the installation of the spindle, and can be adapted to different types of spindles. The locking force can also be adjusted by adjusting the motor output efficiency, so that the installation and fastening of the spindle bearing will have higher precision and efficiency. Attached Figure Description

[0009] Figure 1 This is a 3D view of the fixture for tightening the spindle bearing lock nut.

[0010] Figure 2 This is a schematic diagram of the spindle height adjustment unit.

[0011] Figure 3 This is a schematic diagram of the rotating force application unit structure.

[0012] Figure 4 This is a diagram showing the connection structure between a rotary electric motor and a worm gear.

[0013] Figure 5 This is a diagram showing the working state when the chuck and lock nut are engaged.

[0014] Figure 6 This is a schematic diagram showing the position of the positioning claw in the released state.

[0015] Figure 7 This is a schematic diagram showing the chuck completely disengaging from the locking nut.

[0016] In the diagram, 1-mounting bracket, 2-spindle, 3-pulley block, 4-pulley claw, 5-rotary motor, 6-bearing and locking nut, 7-lower worktable, 8-limit block, 9-lifting bracket, 10-cylinder, 11-base, 12-anchor bolt, 13-upper worktable, 14-slide rail, 15-worm gear, 16-worm, 17-rotating plate, 18-positioning claw, 21-clamping table, 22-clamping tooth. Detailed Implementation

[0017] like Figure 1 As shown, a spindle bearing locking nut fastening fixture includes a spindle height adjustment unit and a rotation force application unit. A horizontal lower worktable 7 is connected to the upper end of the spindle height adjustment unit. A through hole is provided in the center of the lower worktable 7, and the spindle 2 is positioned and connected to the through hole. An upper worktable 13 is provided above the lower worktable 7. The spindle 2 passes through the center of the upper worktable 13. Several pull claws 4 are provided on the lower surface of the upper worktable 13. The pull claws 4 are engaged with the outer circumference of the locking nut of the spindle 2. A pulley group 3 is provided on the lower surface of the mounting platform 1. The pulley group 3 is in contact with the upper surface of the upper worktable 13 and rotates along the axis of the spindle 2. The rotation force application unit is fixed on the mounting platform 1, and its power output end is connected and engaged with the pull claws 4.

[0018] like Figure 2 As shown, the spindle height adjustment unit includes a base 11, a lifting bracket 9, a slide rail 14, and a cylinder 10. The lifting bracket 9 consists of two sets of support rods hinged in an X-shape. The upper end of one set of support rods is hinged to the lower surface of the lower worktable 7, and the lower end is slidably connected to the slide rail 14 of the base 11. The upper end of the other set of support rods is slidably connected to the slide rail 14 of the lower surface of the lower worktable 7, and the lower end is hinged to the base 11. The cylinder 10 is fixedly connected to the side of the base 11, and the piston rod of the cylinder 10 is connected to one of the support rods.

[0019] like Figures 3 to 5 As shown, the rotary force application unit includes a rotary motor 5, a worm gear 15, and a worm 16. The worm gear 15 is coaxially engaged with a through hole in the upper worktable surface 13 via a bearing. The worm gear 15 meshes with the worm 16, and the worm 16 is coaxially connected to the output shaft of the rotary motor 5. A rotating plate 17 is coaxially connected to the worm gear 15. Three pull claws 4 are evenly distributed on the rotating plate 17 via a rotating shaft. One end of each pull claw 4 has a locking platform 21, which engages with a groove on the outer circumference of a locking nut that mates with the main shaft. The other end of each pull claw 4 has a locking tooth 22. Three positioning claws 18 are connected to the rotating plate 17 via a rotating shaft. The positions of the three positioning claws 18 correspond to the positions of the pull claws 4. When the pull claws 4 are in operation, the positioning claws 18 engage with the locking teeth 22. Figures 5 to 7 As shown, when the pull claw 4 is in working condition, the positioning claw 18 and the locking tooth 22 are always in a locked state. Therefore, during the rotation of the rotating plate 17, the pull claw 4 drives the locking nut to tighten onto the main shaft. After tightening, first manually open the positioning claw 18, and then move the pull claw 4 to disengage the locking plate 21 from the locking nut slot.

[0020] To ensure the equipment is level during installation and to guarantee installation accuracy, rectangularly distributed anchor bolts 12 are provided at the bottom of the base 11.

[0021] Before the experiment, the installation position of the device was checked to ensure accuracy, and the lifting bracket 9 was fixed on the base 11. The base 11 was installed on a horizontal plane by anchor bolts 12. The cylinder 10 was installed on the base 11 and connected to the lifting bracket 9. The working position was changed by adjusting the cylinder 10 to raise the bracket. Limiting blocks 8 were placed on the lower worktable 7 and the base 11 to prevent the worktable from being too low or too high and to define the working range of the rotating device. The spindle 2 was installed on the lower worktable 7 and bolted to prevent the spindle from tipping over or shifting during the lifting process. The spindle bearing and locking nut 6 were installed on the spindle. The size of the three sets of pull claws 4 was adjusted to accommodate locking nuts of different diameters. The upper worktable was rotated by the rotary motor 5 and the pulley group 3, and the locking nut was tightened to complete the pre-tightening of the spindle bearing.

[0022] This device utilizes a lifting bracket and cylinders to adjust the position of the lower worktable, thereby adjusting the working position. A pulley system and a rotary motor drive the upper worktable to rotate, thus installing the locking nut. This device improves the tightening efficiency of the spindle bearing locking nut during spindle installation, significantly enhancing the rigidity and stability of the finished spindle.

Claims

1. A locking nut fastening fixture for a spindle bearing, characterized in that: It includes a spindle height adjustment unit and a rotation force application unit; a horizontal lower worktable (7) is connected to the upper end of the spindle height adjustment unit, and a through hole is provided in the center of the lower worktable (7), and the spindle (2) is positioned and connected to the through hole; an upper worktable (13) is provided above the lower worktable (7), and the spindle (2) passes through the center of the upper worktable (13). Several pull claws (4) are provided on the lower surface of the upper worktable (13), and the pull claws (4) are engaged with the outer circumference of the locking nut of the spindle (2). A pulley group (3) is provided on the lower surface of the mounting platform (1), and the pulley group (3) is in contact with the upper surface of the upper worktable (13) and rotates along the axis of the spindle (2); the rotation force application unit is fixed on the mounting platform (1), and the power output end is connected and engaged with the pull claws (4).

2. The spindle bearing locking nut fastening fixture according to claim 1, characterized in that: The spindle height adjustment unit includes a base (11), a lifting bracket (9), a slide rail (14), and a cylinder (10); wherein the lifting bracket (9) is made of two sets of support rods hinged in an X shape, the upper end of one set of support rods of the lifting bracket (9) is hinged to the lower surface of the lower worktable (7), and the lower end is slidably connected to the slide rail (14) of the base (11); the upper end of the other set of support rods is slidably connected to the slide rail (14) of the lower surface of the lower worktable (7), and the lower end is hinged to the base (11); the cylinder (10) is fixedly connected to the side of the base (11), and the piston rod of the cylinder (10) is connected to one of the support rods.

3. The spindle bearing locking nut fastening fixture according to claim 1, characterized in that: The rotating force application unit includes a rotary motor (5), a worm gear (15), and a worm (16); the worm gear (15) is coaxially engaged with the through hole of the upper worktable (13) through a bearing, the worm gear (15) meshes with the worm (16), and the worm (16) is coaxially connected to the output shaft of the rotary motor (5); a rotating plate (17) is coaxially connected to the worm gear (15), and three pull claws (4) are evenly distributed on the rotating plate (17) through the circumference of the rotating shaft. One end of the pull claw (4) is provided with a locking platform (21), which is engaged with the groove on the outer circumference of the locking nut of the main shaft; the other end of the pull claw (4) is provided with a locking tooth (22); three positioning claws (18) are connected to the rotating plate (17) through the rotating shaft, and the positions of the three positioning claws (18) correspond to the positions of the pull claws (4). When the pull claws (4) are in working condition, the positioning claws (18) are engaged with the locking teeth (22).

4. The spindle bearing locking nut fastening fixture according to claim 2, characterized in that: The bottom of the base (11) is provided with rectangularly distributed anchor bolts (12).

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