CN212959758U - Worm shaft with thrust structure - Google Patents

Abstract

The utility model provides a worm axle with thrust structure, including the linkage segment of connecting in order, the shaft shoulder section, worm tooth section and thrust section, the holding tank has been seted up at the middle part of thrust section free end, and the holding tank is the round platform type, and the holding tank is kept away from the one end of worm tooth section and is held for big diameter, and swing joint has the spheroid in the holding tank, and the spheroid part stretches out the holding tank, and wherein, holding tank and spheroid mutually support have good centering nature, can avoid the worm axle to take place to rock after long-time operation, have ensured the transmission accuracy of worm axle.

Description

Worm shaft with thrust structure

Technical Field

The utility model relates to a worm axle technical field specifically is a worm axle with thrust structure.

Background

In the existing worm shaft transmission structure, a worm shaft is generally limited by a thrust screw to prevent the worm shaft from generating axial displacement, wherein a working surface of the thrust screw is a plane which is abutted against a ball head of the worm shaft, and after long-time operation, the ball head of the worm shaft is abraded to cause the worm shaft to shake, so that the transmission accuracy of the worm shaft is reduced.

SUMMERY OF THE UTILITY MODEL

For overcoming the deficiencies of the prior art, the utility model provides a worm axle with thrust structure can avoid worm axle to take place to rock after long-time operation to ensure the transmission accuracy of worm axle.

The utility model adopts the following technical proposal.

The utility model provides a worm axle with thrust structure, includes linkage segment, shoulder section, worm tooth section and the thrust section of connecting in order, the holding tank has been seted up at the middle part of thrust section free end, the holding tank is the round platform type, the one end that worm tooth section was kept away from to the holding tank is big diameter end, swing joint has the spheroid in the holding tank, the spheroid part stretches out the holding tank.

Furthermore, the shaft shoulder section is in a secondary ladder shape, and one end, close to the connecting section, of the shaft shoulder section is a large-diameter end.

Furthermore, a plurality of grooves are formed in the outer side wall of the connecting section in the circumferential direction of the connecting section at equal intervals, and the grooves extend along the axial direction of the connecting section.

Furthermore, the cross section of the groove is triangular.

Furthermore, the edge of the free end of the connecting section is provided with a chamfer.

The utility model has the advantages that:

the utility model provides a pair of worm axle with thrust structure, including the linkage segment that connects in order, the shaft shoulder section, worm tooth section and thrust section, the holding tank has been seted up at the middle part of thrust section free end, and the holding tank is the round platform type, and the one end that worm tooth section was kept away from to the holding tank is big diameter end, and swing joint has the spheroid in the holding tank, and the spheroid part stretches out the holding tank, and wherein, holding tank and spheroid mutually support have good centering nature, can avoid the worm axle to take place to rock after long-time operation, have ensured the transmission accuracy of worm axle.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic structural diagram of the present embodiment;

fig. 2 is a sectional view taken along line a-a of fig. 1.

Reference is made to the accompanying drawings in which:

the connecting section 11, the groove 111, the shoulder section 12, the worm gear section 13, the thrust section 14, the accommodating groove 141 and the ball 15.

Detailed Description

The drawings are for illustrative purposes only and are not to be construed as limiting the patent. It will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The technical solution of the present invention will be further explained with reference to the accompanying drawings and examples.

Referring to the attached drawings, the worm shaft with the thrust structure comprises a connecting section 11, a shaft shoulder section 12, a worm gear section 13 and a thrust section 14 which are connected in sequence, wherein an accommodating groove 141 is formed in the middle of the free end of the thrust section 14, the accommodating groove 141 is in a circular truncated cone shape, one end, away from the worm gear section 13, of the accommodating groove 141 is a large-diameter end, a sphere 15 is movably connected in the accommodating groove 141, and the sphere 15 partially extends out of the accommodating groove 141. Specifically, the worm shaft of the present embodiment is used as an output shaft of the motor and is in transmission connection with the reduction gearbox, wherein a rotor of the motor is sleeved outside the connecting section 11, the shoulder section 12 is rotatably connected with a housing of the motor through a bearing, the worm section 13 is engaged with a worm wheel arranged in the reduction gearbox, and the thrust section 14 is abutted against an inner side wall of the motor through the ball 15.

Preferably, the shaft shoulder section 12 is in a two-stage step shape, and one end of the shaft shoulder section 12 close to the connecting section 11 is a large-diameter end. Specifically, the small diameter end of the shoulder section 12 is in interference fit with the inner ring of the bearing, and the stepped surface of the shoulder section 12 abuts against the inner ring of the bearing.

Preferably, the outer side wall of the connecting section 11 is provided with a plurality of grooves 111 at equal intervals along the circumferential direction of the connecting section, and the grooves 111 extend along the axial direction of the connecting section. Specifically, the inner side wall of the rotor of the motor is provided with a convex key matched with the groove 111, and the rotor of the motor drives the worm shaft to rotate through the matched groove and convex key.

Preferably, the grooves 111 are triangular in cross-section with good centering.

Preferably, the edge of the free end of the connecting section 11 is chamfered to facilitate insertion of the connecting section 11 into the rotor of the motor.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not limitations to the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (5)

1. The worm shaft with the thrust structure is characterized by comprising a connecting section, a shaft shoulder section, a worm gear section and a thrust section which are connected in sequence, wherein a containing groove is formed in the middle of the free end of the thrust section and is in a circular truncated cone shape, one end, far away from the worm gear section, of the containing groove is a large-diameter end, a ball body is movably connected in the containing groove, and the ball body partially extends out of the containing groove.

2. The worm shaft with thrust bearing of claim 1, wherein the shoulder section is two-step shaped, and the end of the shoulder section near the connecting section is a large diameter end.

3. The worm shaft with the thrust structure as claimed in claim 1, wherein the outer side wall of the connecting section is provided with a plurality of grooves at equal intervals along the circumferential direction of the connecting section, and the grooves extend along the axial direction of the connecting section.

4. A worm shaft having a thrust feature as claimed in claim 3, in which the grooves are triangular in cross-section.

5. A worm shaft having a thrust structure as claimed in claim 3, wherein the edge of the free end of the connecting section is chamfered.

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