CN219189255U

CN219189255U - Force application detection device for providing stable axial force for NN series bearing

Info

Publication number: CN219189255U
Application number: CN202320306778.XU
Authority: CN
Inventors: 朱晓飞; 孙井泉; 徐娇; 张琳; 李文浩
Original assignee: Individual
Current assignee: Individual
Priority date: 2023-02-24
Filing date: 2023-02-24
Publication date: 2023-06-16
Anticipated expiration: 2033-02-24

Abstract

The utility model relates to a force application detection device for providing stable axial force for NN series bearings, wherein the outer circumference of a main shaft is a stepped shaft with increased diameter, the middle section is a round table structure with gradually increased diameter from left to right, NN series bearings are arranged on the outer circumference of the round table structure, and the right end face of each NN series bearing is clamped on a stepped limiting table at the right end of the main shaft through a gauge block; an auxiliary sleeve is arranged on the left end face of the NN series bearing, an annular hydraulic cylinder is arranged on the left end face of the auxiliary sleeve, and a piston at the right end of the annular hydraulic cylinder tightly pushes the auxiliary sleeve against the inner ring of the left end face of the NN series bearing; the left end oil filling port of the annular hydraulic cylinder is connected with an oil filling nozzle. On one hand, the device ensures that the NN series bearing end surface is uniformly stressed, and avoids the phenomenon that the bearing end surface is not perpendicular to the axis of the main shaft, thereby ensuring the assembly quality of the bearing; on the other hand, when force is applied, the bearing stably moves along the conical surface of the main shaft, the preset bearing play amount can be achieved rapidly and accurately, the measuring block is convenient to measure the relevant size, and the assembly efficiency is improved.

Description

Force application detection device for providing stable axial force for NN series bearing

Technical Field

The utility model relates to a force application detection device for providing stable axial force for NN series bearings, and belongs to the technical field of bearing assembly tools.

Background

It is known that when the NN-series bearing is provided on the spindle, the play Δrm of the bearing must be set to a certain value in order to improve the rigidity of the bearing itself and to ensure the precision of the spindle assembly during the assembly process. The bearing is pre-tightened to drive the bearing roller to axially displace along the conical surface of the main shaft, and the bearing radial expands accordingly to reach the set value of bearing play. The pre-tightening force is currently applied directly or indirectly to the bearing by means of a lock nut arranged on the spindle assembly itself.

The disadvantage of applying axial force to the bearing is that the end face of the lock nut cannot be ensured to be in uniform contact with the end face of the bearing due to the influence of the matching precision of corresponding threads of the lock nut and the spindle, so that the end face of the bearing and the axis of the spindle can generate a phenomenon of non-perpendicularity, and the subsequent measurement precision is inaccurate. And when the lock nut is rotated, the assembly personnel uses an impact force mode to enable the nut to generate discontinuous and discontinuous axial movement, and the operation is difficult to control the bearing play amount required to be ensured in process setting.

Disclosure of Invention

The utility model aims to solve the technical problem of providing a force application detection device for providing stable axial force for NN series bearings, which can ensure that the end surfaces of NN series bearings are uniformly stressed on one hand, and avoid the phenomenon that the end surfaces of the bearings are not perpendicular to the axis of a main shaft, thereby ensuring the assembly quality of the bearings; on the other hand, when force is applied, the bearing stably moves along the conical surface of the main shaft, the preset bearing play amount can be achieved rapidly and accurately, the measuring block is convenient to measure the relevant size, and the assembly efficiency is improved.

In order to solve the problems, the specific technical scheme of the utility model is as follows: a force application detection device for providing stable axial force for NN series bearings is characterized in that the outer circumference of a main shaft is a stepped shaft with the diameter increased from left to right, the middle section of the main shaft is a round table structure with the diameter gradually increased from left to right, NN series bearings are arranged on the outer circumference of the round table structure, and the right end face of each NN series bearing is clamped on a stepped limiting table at the right end of the main shaft through a gauge block; an auxiliary sleeve is arranged on the left end face of the NN series bearing, an annular hydraulic cylinder is arranged on the left end face of the auxiliary sleeve, and a piston at the right end of the annular hydraulic cylinder tightly pushes the auxiliary sleeve against the inner ring of the left end face of the NN series bearing; the left end oil filling port of the annular hydraulic cylinder is connected with an oil filling nozzle.

The annular hydraulic cylinder and the auxiliary sleeve are respectively positioned on different stepped shafts, the left end face of the NN series bearing is positioned at the stepped shaft where the auxiliary sleeve is positioned, and the left end face of the auxiliary sleeve is positioned at the stepped shaft where the annular hydraulic cylinder is positioned.

The annular hydraulic cylinder has the structure that: the hydraulic cylinder body is internally provided with an annular cavity, a piston is arranged in the annular cavity, and a sealing rubber ring is arranged in a space formed by a piston rod of the piston and the annular cavity; a cylinder cover is arranged at the outlet end of the piston rod and is connected with the hydraulic cylinder body through a fastening screw; the inner surface of the cylinder cover is provided with a plurality of counter bores, springs are arranged in the counter bores, one ends of the springs are supported at the bottoms of the counter bores, and the other ends of the springs are supported on a limiting table of the piston rod.

The left end side of the hydraulic cylinder body is provided with an oil filling port, and the oil filling port is consistent with the moving direction of the piston.

The outer circumference of NN series bearing be equipped with perpendicular to the amesdial of central axis.

The application of this application provides application of force detection device of steady axial force to NN series bearing and adopts above-mentioned structure, has following advantage: in the process of the NN series shaft bearing axial force, the end face of the NN series shaft bearing can be uniformly stressed, the phenomenon that the end face of the bearing is not perpendicular to the axis of the main shaft and the adverse effect of impact force on the bearing precision are avoided, and therefore the assembly quality of the bearing is guaranteed; the bearing can stably generate displacement along the conical surface of the main shaft, the preset bearing play amount is achieved rapidly and accurately, and the measuring block is convenient to measure the relevant size, so that the assembly efficiency is improved.

Drawings

Fig. 1 is a schematic cross-sectional view of the structure of the force application detection device of the present application.

Fig. 2 is an enlarged view of a portion of fig. 1.

Fig. 3 is a working state diagram of the annular hydraulic cylinder.

Fig. 4 is a non-operating state diagram of the ring hydraulic cylinder.

Fig. 5 is a view in the K-direction of fig. 1.

In the figure, 1 a main shaft; 2, a hydraulic cylinder body; 3, sealing the rubber ring; 5, fastening a bolt; 6 NN series bearings; 7 gauge blocks; 8 dial gauge; 9 auxiliary sleeves; 10 cylinder covers; 11 springs; a 12-piston; 13 grease nipple.

Description of the embodiments

As shown in fig. 1 and 2, a force application detection device for providing stable axial force for an NN-series bearing is provided, wherein the outer circumference of a main shaft 1 is a stepped shaft with an increased diameter from left to right, the middle section is a truncated cone structure with an increased diameter from left to right, the outer circumference of the truncated cone structure is provided with the NN-series bearing 6, and the right end face of the NN-series bearing 6 is clamped on a stepped limiting table at the right end of the main shaft 1 through a gauge block 7; an auxiliary sleeve 9 is arranged on the left end face of the NN series bearing 6, an annular hydraulic cylinder is arranged on the left end face of the auxiliary sleeve 9, and a piston at the right end of the annular hydraulic cylinder tightly pushes the auxiliary sleeve 9 against the left end face of the NN series bearing 6; the left end oil filling port 13 of the annular hydraulic cylinder is connected with the oil filling nozzle 13.

The annular hydraulic cylinder and the auxiliary sleeve 9 are respectively positioned on different stepped shafts, the left end face of the NN series bearing 6 exceeds the right limit table of the stepped shaft where the auxiliary sleeve 9 is positioned, and the left end face of the auxiliary sleeve 9 exceeds the right limit table of the stepped shaft where the annular hydraulic cylinder is positioned.

The annular hydraulic cylinder has the structure that: the hydraulic cylinder body 2 is internally provided with an annular cavity, a piston 12 is arranged in the annular cavity, and sealing rubber rings 3 are arranged in the space formed by the two sides of a piston rod of the piston 12 and the annular cavity; a cylinder cover 10 is arranged at the outlet end of the piston rod, and the cylinder cover 10 is connected with the hydraulic cylinder body 2 through a fastening screw 5; the inner surface of the cylinder cover 10 is provided with a plurality of counter bores, springs 11 are arranged in the counter bores, one ends of the springs 11 are supported at the bottoms of the counter bores, and the other ends of the springs 11 are supported on a limiting table of a piston rod.

An oil filling port 13 is arranged at the left end side of the hydraulic cylinder body 2, and the movement direction of the oil filling port 13 is consistent with that of the piston 12.

The outer circumference of NN series bearing 6 be equipped with perpendicular to the amesdial 8 of central axis.

The working principle of the application is as follows:

as shown in fig. 3, the hydraulic medium in the hydraulic pump enters between the inner end surface of the hydraulic cylinder 2 and the piston 12 through the oil nozzle 13 to form a hydraulic working chamber. Since the hydraulic cylinder 2 is already fixed on the main shaft, the hydraulic force will push the piston 12, together with the auxiliary sleeve 9 and the NN-series bearing 6, to smoothly displace along the main shaft. At the same time, the spring 11 is further compressed and the NN-series bearing 6 expands in the diameter direction.

As shown in fig. 4, the outer ring of the NN-series bearing 6 is pushed in the direction of the double arrow, the variation of the indicator needle of the dial indicator 8 is observed, when the variation of the indicator needle reaches the bearing play Δrm required by the related technical document, the pressing is stopped, and then as shown in fig. 1, the distance L from the end face of the NN-series bearing 6 to the shaft shoulder of the spindle 1 is measured by using the gauge block 7. After the measurement is completed, hydraulic pressure from the manual hydraulic pump is removed, and the piston 12 returns to the original position under the action of the spring force of the spring 11, so that the force application and measurement processes are completed. The utility model creates a force application detection device which is proved by the assembly trial of TS-A0620 and TS-A0823 main shaft units from Shenyang to the rigid main shaft technology limited company, has simple structure, low cost, reliable performance and flexible operation, and plays an important role in ensuring the assembly precision of the main shaft unit, improving the comprehensive performance of the main shaft unit and improving the assembly working efficiency of the main shaft unit.

Claims

1. A force application detection device for providing a stationary axial force to an NN-series bearing, characterized by: the outer circumference of the main shaft (1) is a stepped shaft with the diameter increased from left to right, the middle section is a truncated cone structure with the diameter gradually increased from left to right, NN series bearings (6) are arranged on the outer circumference of the truncated cone structure, and the right end face of each NN series bearing (6) is clamped on a stepped limiting table at the right end of the main shaft (1) through a gauge block (7); an auxiliary sleeve (9) is arranged on the left end face of the NN series bearing (6), an annular hydraulic cylinder is arranged on the left end face of the auxiliary sleeve (9), and a piston at the right end of the annular hydraulic cylinder tightly pushes the auxiliary sleeve (9) against the inner ring of the left end face of the NN series bearing (6); the left end oil filling port (13) of the annular hydraulic cylinder is connected with an oil filling nozzle.

2. The force application detection device for providing a smooth axial force to NN-series bearings as claimed in claim 1, characterized in that: the annular hydraulic cylinder and the auxiliary sleeve (9) are respectively positioned on different stepped shafts, the left end face of the NN series bearing (6) is positioned at the stepped shaft where the auxiliary sleeve (9) is positioned, and the left end face of the auxiliary sleeve (9) is positioned at the stepped shaft where the annular hydraulic cylinder is positioned.

3. The force application detection device for providing a smooth axial force to NN-series bearings as claimed in claim 1, characterized in that: the annular hydraulic cylinder has the structure that: an annular cavity is formed in the hydraulic cylinder body (2), a piston (12) is arranged in the annular cavity, and a sealing rubber ring (3) is arranged in a space formed by a piston rod of the piston (12) and the annular cavity; a cylinder cover (10) is arranged at the outlet end of the piston rod, and the cylinder cover (10) is connected with the hydraulic cylinder body (2) through a fastening screw (5); the inner surface of the cylinder cover (10) is provided with a plurality of counter bores, springs (11) are arranged in the counter bores, one ends of the springs (11) are supported at the bottoms of the counter bores, and the other ends of the springs (11) are supported on a limiting table of the piston rod.

4. The force application detection device for providing a smooth axial force to NN-series bearings as claimed in claim 3, wherein: an oil filling port (13) is arranged at the left end side of the hydraulic cylinder body (2), and the movement direction of the oil filling port (13) is consistent with that of the piston (12).

5. The force application detection device for providing a smooth axial force to NN-series bearings as claimed in claim 1, characterized in that: the outer circumference of NN series bearing (6) be equipped with perpendicular to the amesdial (8) of central axis.