CN214888440U - Bidirectional locking device for bearing outer ring - Google Patents

Abstract

The utility model discloses a bidirectional locking device for a bearing outer ring, which comprises a bearing baffle plate, wherein the bearing baffle plate comprises a sleeve-shaped stop pin axial guide cylinder, the periphery of the top of the axial guide cylinder of the stop pin is provided with a convex edge, the side wall of the axial guide cylinder of the stop pin is provided with a radial guide groove of the stop pin, the vertical shaft of an L-shaped stop pin is inserted into the axial guide cylinder of the stop pin, the horizontal shaft of the L-shaped stop pin passes through the radial guide groove of the stop pin, a stop pin head connecting threaded hole is arranged in the middle of the bottom wall of the vertical shaft of the L-shaped stop pin, the sleeve is tightly pressed on the bottom wall of the axial guide cylinder of the stop pin through an annular convex shoulder, the upper end of one guide rod is provided with a guide rod connecting external thread end, the lower end of the guide rod is provided with a raised head, the guide rod between the guide rod connecting external thread end and the raised head is sleeved with a return spring, the guide rod is inserted into the sleeve, and the guide rod connecting external thread end is in threaded connection with the stop pin head connecting threaded hole. The device realizes the axial positioning of the bearing outer ring and ensures the axial assembly precision of the bearing.

Description

Bidirectional locking device for bearing outer ring

Technical Field

The utility model relates to a locking device especially relates to two-way locking device of bearing inner race.

Background

The gear shaft is one of main parts of power transmission gear boxes of wind turbine generators, ships and the like, and two ends of the gear shaft are fixed on the gear box shell. Install large-scale bearing between gear shaft and the casing, the gear box operation, the supporting role that the gear shaft passes through the both ends bearing is rotatory around the gear shaft axis, can generate heat because of the rotatory in-process of bearing ball in the raceway, make the fit clearance of casing and bearing can be bigger and bigger, cause the relative casing bearing hole of bearing inner race to rotate, thereby bearing inner race and casing bearing position relative wear, bearing race circle promptly, can lead to gear spare transmission unstable, cause unrepairable damage to the gear box, slight bearing damage can influence the life of bearing, serious bearing damage can influence the normal operating of whole gear box.

With the technical development and innovation in the field of mechanical design, the requirement for the power density of the gearbox is gradually increased, so that the redundant space inside the gearbox is greatly reduced, and the installation space of a dividing pin, a baffle plate and other fasteners for limiting the position of a bearing is also completely reduced.

As shown in fig. 1-1 and 1-2, it is common in the gear box industry to mount a flange baffle on an end face of a bearing position of a gear box to achieve an axial positioning effect of a bearing outer ring, and to prevent the bearing outer ring from running by arranging an index pin in a direction parallel to an axis of the bearing.

The flange baffle is fixedly arranged on the end surface of the bearing position through bolts; a threaded through hole is formed in the position, close to the end face of the bearing outer ring, of the flange baffle; the indexing pin is arranged on the threaded through hole of the flange baffle through threads; a pin head (which also serves as a guide rod) with a telescopic front end of the index pin is clamped into the bearing stop groove to bear shearing force between the end face of the bearing outer ring and the bearing baffle plate, so that radial positioning of the bearing outer ring is realized.

The length of the bearing outer ring positioning mode which needs to be reserved in the axial direction of the internal space of the gear box is the sum of the thickness of the bearing baffle and the length of the indexing pin, so that a large amount of redundancy is generated in the internal space of the gear box, the axial length of the gear box cannot be compressed in the capacity upgrading design process, and the bearing outer ring positioning mode becomes one of bottleneck technologies for increasing the power density of the current gear box.

Disclosure of Invention

An object of the utility model is to overcome prior art's not enough, provide one kind and can guarantee the gear box when the axial space is limited bearing inner race at the bearing inner race two-way locking device of radial and axial location locking.

The utility model discloses a two-way locking device of bearing inner race, including the bearing baffle, the bearing baffle include the stop pin axial guide tube that is the sleeve pipe form, the top of stop pin axial guide tube around be provided with protruding edge, protruding edge go up and along the radial direction of stop pin axial guide tube open the radial breach that has the guiding hole intercommunication in the middle of with stop pin axial guide tube, the stop pin axial guide tube lateral wall of radial breach below open and have stop pin radial guide slot, the guiding hole in the middle of the stop pin axial guide tube constitute by the unthreaded hole of upper portion and the screw hole of lower part, the diameter of screw hole be greater than the diameter of unthreaded hole, the vertical axis of an L shape stop pin insert the unthreaded hole and with unthreaded hole sliding connection, the cross axle of L shape stop pin pass the setting of stop pin radial guide slot, open in the middle of the diapire of the vertical axis of L shape stop pin and have stop pin head connection screw hole, the sleeve part positioned above the annular convex shoulder is an upper external thread end in threaded connection with a threaded hole, the sleeve is tightly pressed on the bottom wall of the axial guide cylinder of the stop pin through the annular convex shoulder, the sleeve part positioned below the annular convex shoulder is a sleeve mounting external thread end, the upper end of a guide rod is provided with a guide rod connecting external thread end, the lower end of the guide rod is provided with a raised head, a return spring is sleeved on the guide rod between the guide rod connecting external thread end and the raised head, the guide rod is inserted into the sleeve, the guide rod connecting external thread end is in threaded connection with the threaded hole of the stop pin head, the lower end of the return spring is fixedly connected with the raised head, and the upper end of the return spring is tightly pressed on the bottom wall of the axial guide cylinder of the stop pin.

The beneficial effects of the utility model are that carry out integrated design with the type that resets stop pin and bearing axial baffle, reduce the locking device installation degree of difficulty, the shearing force that the stop pin head bore comes from between bearing inner race outer diameter face and the bearing frame simultaneously, locking device only need take a bearing baffle thickness at gear box inner space axial direction can, solved bearing inner race axial positioning and radial race ring's problem under the not enough condition of high power gear box axial space.

Under the condition that the matching state of the bearing outer ring and the locking device cannot be visually adjusted due to the fact that one side of the bearing of the gear box is of a closed structure, the bearing outer ring pushes the stop pin head to move along the axis to compress the return spring when the bearing is installed, and when the gear box runs, the compression potential energy stored by the return spring pushes the stop pin to fall into the stop groove of the bearing outer ring, so that the radial automatic locking function of the bearing outer ring is realized; in addition, the axial positioning of the bearing is realized through the bearing baffle, and the axial assembly precision of the bearing is guaranteed. The production efficiency and the product quality of the gear box are greatly improved through the structure.

Drawings

FIG. 1-1 is a schematic drawing of a stop pin of a prior art bearing outer race positioning device;

fig. 1-2 are schematic structural views of a stop pin locking of a conventional bearing outer ring positioning device;

fig. 2 is a schematic perspective view of a bidirectional locking device for a bearing outer ring of the present invention in a free state;

FIG. 3 is a perspective partial cross-sectional view of the bearing indexing bi-directional locking device shown in FIG. 2;

FIG. 4 is a perspective partial cross-sectional view of the retaining pin in the device shown in FIG. 2;

FIG. 5 is a perspective view of a guide bar in the device shown in FIG. 2;

FIG. 6 is a schematic view of the mounting structure of the apparatus shown in FIG. 2;

FIG. 7 is a partial cross-sectional view of the mounting structure shown in FIG. 6;

fig. 8 is a partially enlarged schematic view of the mounting structure shown in fig. 7.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

The utility model discloses a two-way locking device of bearing inner race as shown in the attached drawing, including bearing baffle 2, bearing baffle 2 include the stop pin axial guide tube that is the sleeve pipe form, be provided with protruding edge around the top of stop pin axial guide tube, protruding edge go up and along the radial direction of stop pin axial guide tube open have with the radial breach 12 of the guide hole intercommunication in the middle of the stop pin axial guide tube, it has stop pin radial guide slot to open on the stop pin axial guide tube lateral wall below radial breach, the guide hole in the middle of the stop pin axial guide tube constitute by the unthreaded hole of upper portion and screw hole 13 of lower part, the diameter of screw hole 13 be greater than the diameter of unthreaded hole, the vertical axis of an L shape stop pin 1 inserts the unthreaded hole and with unthreaded hole sliding connection, the horizontal axis of L shape stop pin 1 pass the setting of stop pin radial guide slot, L shape stop pin 1 the diapire in the middle of the vertical axis open stop pin head connecting screw hole 11, an annular shoulder is arranged on one sleeve 3, the sleeve part above the annular shoulder is an upper external thread end in threaded connection with a threaded hole 13, the sleeve 3 is pressed on the bottom wall of the axial guide sleeve of the stop pin through the annular shoulder, and the sleeve part below the annular shoulder is a sleeve mounting external thread end 14. The upper end of one guide rod 4 is provided with a guide rod connecting external thread end 17, and the lower end of the guide rod 4 is provided with a raised head 15 so as to facilitate the connection of the guide rod 4 and a stop pin by a wrench. The guide rod between the guide rod connecting external thread end 17 and the convex head is sleeved with a return spring 16, the guide rod 4 is inserted into the sleeve 3, the guide rod connecting external thread end 17 is in threaded connection with the stop pin head connecting threaded hole 11, the lower end of the return spring 16 is fixedly connected with the convex head, and the upper end of the return spring is pressed on the bottom wall of the stop pin axial guide cylinder.

The assembly process of the locking device is as follows:

101, screwing and connecting the upper external thread end of the sleeve 3 with the threaded hole 13 of the bearing baffle 2;

102, inserting one end of a stop pin head connecting threaded hole 11 of the stop pin 1 into a unthreaded hole in the middle of the stop pin axial guide cylinder;

103, sleeving a return spring 16 into the guide rod from the guide rod connecting external thread end 17;

104, connecting the external thread end 17 of the guide rod with the sleeve 3 and penetrating along the inner hole of the sleeve;

and 105, screwing the connecting external thread end 17 of the guide rod and the stop pin head connecting threaded hole 11 by using a hexagonal wrench, so that the assembly of the locking device is completed.

The use method of the device is as follows:

firstly, uniformly arranging locking device mounting holes 7 with the same number as the locking devices at intervals in the circumferential direction of an end face 10 of a shell bearing seat 6 for mounting a bearing, wherein the axis of each locking device mounting hole 7 is parallel to the axis of the shell bearing seat 6, each locking device mounting hole 7 is a stepped hole, each stepped hole comprises a lower thread locking hole in threaded connection with a sleeve mounting external thread end 14 and an upper light hole in sliding fit with a stop pin axial guide cylinder, bearing outer ring locking grooves 9 with the same number as the locking devices are uniformly arranged on the outer side wall of the circumferential direction of the end face side of a bearing outer ring 8 at intervals, and the directions of the three bearing outer ring locking grooves 9 are consistent with the transverse axis direction of the stop pin and are all arranged along the radial direction of the shell bearing seat 6;

secondly, sleeving a spring washer 5 at the bottom of the sleeve 3 of each group of locking devices; the bearing is arranged in a bearing seat 6 of the shell;

thirdly, a group of locking devices are arranged in each locking device mounting hole 7, each group of locking devices are in threaded connection with the lower threaded locking hole through the sleeve mounting external thread end 14, and the locking devices are screwed until the radial notches 12 point to the center of the bearing;

fourthly, the bearing is arranged in the bearing seat 6 of the shell, so that the bottom wall of the convex edge of the bearing is tightly attached to the end surface of the bearing seat 6 of the shell, and the axial positioning and locking functions of the bearing are realized;

fifthly, if the transverse shaft of the L-shaped stop pin 1 is not aligned with the bearing outer ring stop groove 9, the transverse shaft of the L-shaped stop pin 1 is contacted with the end part of the bearing outer ring, the reset spring 16 is in a compressed state, at the initial stage of the condition that the gear box runs to generate the bearing outer ring race, the bearing outer ring stop groove 9 rotates to be aligned with the transverse shaft of the L-shaped stop pin 1, the L-shaped stop pin 1 is released by the elastic force of the reset spring 16, and the transverse shaft of the L-shaped stop pin 1 is inserted into the bearing outer ring stop groove 9 to complete automatic locking, so that the radial positioning function of the bearing is realized.

Claims (1)

1. The utility model provides a two-way locking device of bearing inner race which characterized in that: the bearing baffle plate comprises a bearing baffle plate (2), the bearing baffle plate comprises a sleeve-shaped stop pin axial guide cylinder, convex edges are arranged on the periphery of the top of the stop pin axial guide cylinder, a radial notch (12) communicated with a guide hole in the middle of the stop pin axial guide cylinder is formed in the upper part of the convex edges and in the radial direction of the stop pin axial guide cylinder, a stop pin radial guide groove is formed in the side wall of the stop pin axial guide cylinder below the radial notch, a guide hole in the middle of the stop pin axial guide cylinder is composed of an upper light hole and a lower threaded hole (13), the diameter of the threaded hole is larger than that of the light hole, a vertical shaft of an L-shaped stop pin (1) is inserted into the light hole and is in sliding connection with the light hole, a transverse shaft of the L-shaped stop pin penetrates through the stop pin radial guide groove, a stop pin head connecting threaded hole (11) is formed in the middle of the bottom wall of the vertical shaft of the L-shaped stop pin, an annular shoulder is arranged on one sleeve (3), the sleeve part above the annular shoulder is an upper external thread end in threaded connection with the threaded hole, the sleeve is pressed on the bottom wall of the axial guide sleeve of the stop pin through an annular convex shoulder, the sleeve part below the annular convex shoulder is a sleeve mounting external thread end (14), the upper end of one guide rod (4) is provided with a guide rod connecting external thread end (17), a raised head (15) is arranged at the lower end of the guide rod, a return spring (16) is sleeved on the guide rod between the external thread end of the guide rod and the raised head, the guide rod is inserted into the sleeve (3) and the connecting external thread end of the guide rod is in threaded connection with the connecting threaded hole of the stop pin head, the lower end of the return spring is fixedly connected with the raised head, and the upper end of the return spring is pressed on the bottom wall of the axial guide cylinder of the stop pin.

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