CN102130528B - Structure for automatically balancing axial stress of bearings at two ends - Google Patents

Abstract

A structure that automatically balances the axial force of the bearings at both ends has a reasonable structure, can automatically balance the axial force of the bearings at both ends, and has the characteristics of reliable function and no need for adjustment. On the inner ring of the front bearing (3), the other end is applied to the shaft shoulder of the motor shaft (4), and transmitted to the inner ring of the rear end bearing (11) through the shaft shoulder, so as to achieve automatic balance of the bearings at both ends The purpose of axial force.

Description

A structure that automatically balances the axial force of the bearings at both ends

technical field

The invention relates to a mechanical structure in the field of mechanical manufacturing, which can automatically balance the axial force of bearings at both ends, compared with the traditional way of using adjusting pads or lock nuts, and has the characteristics of reliable function and no need for adjustment.

Background technique

Using two bearings to support both ends of the rotating shaft is the most common structural form in the mechanical field. Generally speaking, since deep groove ball bearings are often used, it is not suitable to bear too much axial load. The traditional method is to control the axial clearance between bearings within a certain range by adding a set of gaskets with different thicknesses. ; or by using a lock nut to control the axial clearance between the two bearings. The disadvantages of these two methods are: the adjustment is more difficult, and the bearing is easily damaged after the gasket is worn or the lock nut is loose.

Contents of the invention

The purpose of the present invention is to provide a mechanical structure with a reasonable structure, which can automatically balance the axial force of the bearings at both ends, and has the characteristics of reliable function and no need for adjustment.

The invention purpose of the present invention takes a servo motor as an example, and the realization process is as follows: an automatic balance bearing axial force structure at both ends includes a motor front cover 1, a motor front bearing gland 2, a front end bearing 3, a motor shaft 4, and a front bearing Retaining ring 5, adjusting spring 6, motor stator 7, motor rear cover 8, motor rear end bearing gland 9, rear end bearing retaining ring 10, rear end bearing 11, motor rotor 12. Motor front cover 1 is equipped with motor front bearing gland 2 and fastening screws, front end bearing 3, motor stator 7; motor rear cover 8 is equipped with motor rear end bearing gland 9 and fastening screws, rear end bearing 11; On the motor shaft 4, the front end is equipped with an adjustment spring 6, and the rear end is equipped with a motor rotor 12.

With adjusting spring 6, the front end of motor shaft 4 of motor rotor 12 being housed, match with the inner ring diameter of the front end bearing 3 of packing into motor front cover 1, compress in place.

Put the motor rear cover 8 equipped with the rear end bearing gland 9 and the rear end bearing 11 into the rear end of the motor shaft 4, match the inner ring of the rear end bearing 11 with the corresponding shaft diameter of the motor shaft 4, and press it tightly in place.

Align the assembly threaded holes of the motor front cover 1 and the motor rear cover 8, and tighten the screws to fit in place.

Install the front bearing retaining ring 5 and the rear end bearing retaining ring 10 on the corresponding shaft diameter positions of the motor shaft 4 .

After the above assembly is completed, one end of the axial pretightening force of the adjusting spring is applied to the inner ring of the front bearing, and the other end is applied to the shoulder of the motor shaft, and is transmitted to the inner ring of the rear end bearing through the shoulder, so that The purpose of automatically balancing the axial force of the bearings at both ends is achieved.

Compared with the traditional structure, the axial force structure of the self-balancing bearings at both ends of the present invention has the following advantages:

1. Due to the use of the self-balancing axial force structure of the bearings at both ends, it is not necessary to make the position of the adjusting gasket or the thread of the lock nut on the motor shaft, thus simplifying the structure.

2. Due to the pre-tightening force in the assembly of the adjusting spring, there will be no gap due to long service time, which can prevent the performance of the bearing from being affected by the gap and prolong the service life of the bearing.

3. Since there is a pre-tightening force when the spring is assembled, there is no need to adjust it during the assembly process, which simplifies the assembly procedure.

Description of drawings

Figure 1 takes the servo motor as an example to illustrate the cross-sectional view of the axial force-bearing structure of the self-balancing bearings at both ends.

In Fig. 1, specific numbers represent: 1-drive wheel; 2-drive shaft; 3-connection plate; 4-connection screw.

Detailed ways

The present invention will be further described in conjunction with accompanying drawing:

Referring to Fig. 1, an automatic balance bearing axial force structure at both ends includes a motor front cover 1, a motor front bearing cover 2, a front end bearing 3, a motor shaft 4, a front bearing retaining ring 5, an adjustment spring 6, and a motor Stator 7, motor rear cover 8, motor rear end bearing gland 9, rear end bearing retaining ring 10, rear end bearing 11, motor rotor 12. According to the requirements put forward by the servo motor manufacturer, complete the assembly of the motor rotor 12 and the motor shaft 4 and the assembly of the motor stator 7 and the motor rear cover 8; install the adjustment spring 6 on the front end of the motor shaft 4, and then install the front end bearing 3 in sequence , front end bearing retaining ring 5; put the rear end bearing 11 into the bearing hole of the motor rear cover 8, then pass the motor shaft 4 out from the motor rear cover 8, and tighten the rear end bearing 11 in place; put the motor shaft 4 The front end passes through the hole 1 of the motor front cover, so that the front end bearing 3 is put into the bearing hole of the motor front cover 1, aligns the threaded assembly holes of the motor front cover 1 and the motor rear cover 8, and screws into the assembly; before the final assembly The bearing gland 2 and the rear end bearing gland 9 complete the assembly of the servo motor.

At this time, due to the axial pretightening force of the adjustment spring 6, one end is applied to the inner ring of the front bearing 3, and the other end is applied to the shaft shoulder of the motor shaft 4, and is transmitted to the inner ring of the rear end bearing 11 through the shaft shoulder. , so as to achieve the purpose of automatically balancing the axial force of the bearings at both ends.

Claims (1)

1. an autobalance bearings at both ends axially loaded structure comprises motor front shroud (1), motor fore bearing gland (2), front end bearing (3), motor shaft (4), fore bearing back-up ring (5), regulating spring (6), motor stator (7), motor back cover (8), motor rear end bearing gland (9), rear end bearing back-up ring (10), rear end bearing (11), rotor (12); It is characterized in that: on the described motor front shroud (1), motor fore bearing gland (2) and trip bolt, front end bearing (3), motor stator (7) are housed; On the described motor back cover (8), motor rear end bearing gland (9) and trip bolt, rear end bearing (11) are housed; On the described motor shaft (4), front end is equipped with regulating spring (6), rotor (12) is equipped with in the rear end; The described front end that the motor shaft (4) of regulating spring (6), rotor (12) is housed matches with the interior ring diameter of the front end bearing (3) of the motor front shroud (1) of packing into, and compression puts in place; The described motor back cover (8) that rear end bearing gland (9), rear end bearing (11) are housed, the rear end of the motor shaft of packing into (4) makes the interior ring of rear end bearing (11) match with the corresponding diameter of axle of motor shaft (4), and compression puts in place; After the assembling screwed hole of described motor front shroud (1) and motor back cover (8) aligns, be screwed into screw and be seated; Fore bearing back-up ring (5), rear end bearing back-up ring (10) are installed in the corresponding diameter of axle position of described motor shaft (4); After the described installation, axial pre tightening force one end of regulating spring (6) imposes on the interior ring of front end bearing (3), the other end imposes on the shaft shoulder of motor shaft (4), and be passed to by the shaft shoulder on the interior ring of rear end bearing (11), thereby reach the purpose of the axially loaded of autobalance bearings at both ends.

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