CN216279287U

CN216279287U - Quick-change connecting shaft mechanism

Info

Publication number: CN216279287U
Application number: CN202122787846.2U
Authority: CN
Inventors: 刘浩; 邹迪
Original assignee: Shanghai Fuya Technology Co ltd
Current assignee: Shanghai Fuya Technology Co ltd
Priority date: 2021-11-15
Filing date: 2021-11-15
Publication date: 2022-04-12
Anticipated expiration: 2031-11-15

Abstract

The utility model relates to a quick-change connecting shaft mechanism which comprises a screw and a reduction gearbox, wherein the shaft outlet end of the reduction gearbox is embedded at the end part of the screw; the output shaft end of the reduction gearbox comprises a cylindrical shaft head, and pin keys are symmetrically arranged on the outer circumferential wall of the shaft head; the end part of the screw is provided with a central hole along the central axis of the screw, through grooves are symmetrically formed in the outer wall of the end part along the central axis direction of the end part, the top end of each through groove is defined as one end far away from the screw, the bottom end of each through groove is not contacted with the screw, the bottom end of each through groove is provided with a transverse groove along the radial direction of the screw, and the transverse grooves are communicated with the through grooves to form an L shape; the utility model can easily realize the connection and matching between the screw and the reduction gearbox, and can adapt to screws of different types and provide larger torque.

Description

Quick-change connecting shaft mechanism

Technical Field

The utility model relates to a quick-change connecting shaft mechanism, and belongs to the field of connection structures between a screw and a reduction gearbox.

Background

The existing screw and the reduction gearbox are single in connection structure, flat keys are welded in a screw hollow shaft, a flat groove is cut at the end of a shaft outlet part of the reduction gearbox, circular arc transition is added, and torque is transmitted through the flat keys in the shaft.

But the structure has higher processing difficulty and few domestic processing units; even if the parts are replaced, the parts are difficult to manufacture and depend on import. Meanwhile, because the flat key is added in the threaded hollow shaft, the output shaft of the reduction box is very fine and is not suitable for a screw with a small diameter.

SUMMERY OF THE UTILITY MODEL

The utility model provides a quick-change connecting shaft mechanism which can easily realize the connection and matching between a screw and a reduction gearbox, can adapt to screws of different models and provides larger torque.

The technical scheme adopted by the utility model for solving the technical problems is as follows:

a quick-change connecting shaft mechanism comprises a screw and a reduction gearbox, wherein the shaft outlet end of the reduction gearbox is embedded in the end part of the screw;

the output shaft end of the reduction gearbox comprises a cylindrical shaft head, and pin keys are symmetrically arranged on the outer circumferential wall of the shaft head;

the end part of the screw is provided with a central hole along the central axis of the screw, through grooves are symmetrically formed in the outer wall of the end part along the central axis of the end part, the top end of each through groove is defined as one end far away from the screw, the bottom end of each through groove is not contacted with the screw, the bottom end of each through groove is provided with a transverse groove along the radial direction of the screw, and the transverse grooves are communicated with the through grooves to form an L shape;

when the output shaft end of the reduction gearbox is screwed into the end part of the screw rod, the transverse groove is communicated with the through groove to form an L-shaped structure matched with a pin key;

as a further preferred aspect of the present invention, the distance of the pin key in the radial direction of the head is equal to the width of the through groove;

as a further preference of the present invention, the length of the pin key in the axial direction of the head is equal to the distance of the transverse groove in the axial direction in the end of the screw;

as a further preference of the present invention, the distance of the pin key in the radial direction of the head of the shaft is equal to the distance of the transverse groove in the radial direction of the end of the screw;

as a further optimization of the utility model, the size of the shaft head of the reduction box is matched with the central hole of the screw rod.

Through the technical scheme, compared with the prior art, the utility model has the following beneficial effects:

1. the quick-change connecting shaft mechanism provided by the utility model is simple to process and easy to manufacture, and the manufacturing cost is greatly reduced;

2. according to the quick-change connecting shaft mechanism provided by the utility model, the accuracy of the structure at the tolerance part only needs to be matched with the shaft head through the central hole, the matching is easy to guarantee, and the manufacturing difficulty is greatly reduced;

3. according to the quick-change connecting shaft mechanism provided by the utility model, the diameter of the shaft head at the shaft outlet end of the reduction box can be larger than the diameter of the thread bottom of the screw, and even the screw with a small shaft diameter can provide larger torque.

Drawings

The utility model is further illustrated with reference to the following figures and examples.

FIG. 1 is a schematic diagram of the overall structure of the preferred embodiment of the present invention;

FIG. 2 is a perspective view of the output shaft end structure of the reduction gearbox in the preferred embodiment of the present invention;

FIG. 3 is a perspective view of the end structure of the screw in the preferred embodiment of the present invention;

FIG. 4 is a side view of the output shaft end structure of the reduction gearbox in the preferred embodiment of the present invention;

fig. 5 is a side view of the end structure of the screw in the preferred embodiment of the present invention.

In the figure: 1 is a shaft head, 2 is a pin key, 3 is the end part of a screw rod, 4 is a central hole, 5 is a through groove, and 6 is a transverse groove.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. In the description of the present application, it is to be understood that the terms "left side", "right side", "upper part", "lower part", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and that "first", "second", etc., do not represent an important degree of the component parts, and thus are not to be construed as limiting the present invention. The specific dimensions used in the present example are only for illustrating the technical solution and do not limit the scope of protection of the present invention.

As pointed out in the background art, the connection between the existing screw and the reduction gearbox is usually that a flat key is welded in a screw hollow shaft, a flat groove is arranged at the end part of an output shaft part of the reduction gearbox, and torque is transmitted through the flat key, so that the processing difficulty of the transmission structure is high, and meanwhile, the output shaft of the reduction gearbox becomes tiny due to the flat key processed in the screw hollow shaft, and the reduction gearbox cannot adapt to various types of screws, particularly small-diameter screws.

Based on this, this application provides a quick change coupling mechanism, and this mechanism mainly relies on reducing gear box axle output end and screw rod tip body, need not plus the structure, and it can only to inlay the axle output end of reducing gear box in the tip 3 of screw rod as shown in figure 1.

Fig. 2 and fig. 4 show the schematic structural diagram of the output shaft end of the gearbox, and it can be clearly seen from the diagram that the output shaft end of the gearbox comprises a cylindrical shaft head, and pin keys 2 are symmetrically arranged on the outer circumferential wall of the shaft head; fig. 3 and 5 show structural schematic diagrams of the end portion of the screw, the end portion of the screw is provided with a central hole 4 along a central axis of the screw, through grooves 5 are symmetrically formed in an outer wall of the end portion along the central axis of the end portion, the top ends of the through grooves are defined as ends far away from the screw, the bottom end of each through groove is not in contact with the screw, the bottom end of each through groove is provided with a transverse groove 6 along the radial direction of the screw, and the transverse grooves are communicated with the through grooves to form an L shape; all the structures are arranged so that when the output shaft end of the reduction gearbox is screwed into the end part of the screw rod, the transverse groove and the L-shaped structure formed by communicating the through grooves are matched with a pin key, and when torque is transmitted, the pin key provides axial positioning.

In the quick-change connecting shaft mechanism provided by the application, a central hole is formed in the end part of the screw along the central axis of the screw, the central hole is matched with a shaft head at the shaft outlet end of the reduction gearbox, and the central hole is used for concentricity positioning to ensure concentricity; the transverse groove and the through groove are formed in the end portion of the screw rod to facilitate the screw-in of the output shaft end of the reduction gearbox and achieve axial positioning.

And finally, in order to better realize the connection of the whole connecting shaft mechanism and realize the tight fit of a tolerance part, the distance of the pin key in the radial direction of the shaft head is equal to the width of the through groove, the length of the pin key in the central axis direction of the shaft head is equal to the distance of the transverse groove in the axial direction of the end part of the screw rod, and the distance of the pin key in the radial direction of the shaft head is equal to the distance of the transverse groove in the radial direction of the end part of the screw rod.

The symmetrical pin key is embedded into the shaft head of the screw rod through the matched transverse groove on the output shaft end of the reduction gearbox, then the output shaft end rotates, the pin key is screwed into the transverse groove, connection is achieved, when the quick-change connecting shaft mechanism is used in a system, because the running direction of the screw rod is opposite to the direction of the pin key screwed into the transverse groove, the resistance of the pin key embedded into the transverse groove is increased, the phenomenon that the connecting shaft mechanism is loosened can not occur, the precision requirement of the mechanism matching is further guaranteed, and the quick-change connecting shaft mechanism is suitable for being popularized on a large scale.

It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

The meaning of "and/or" as used herein is intended to include both the individual components or both.

The term "connected" as used herein may mean either a direct connection between components or an indirect connection between components via other components.

In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations can be made by the worker in the light of the above teachings without departing from the spirit of the utility model. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. The utility model provides a quick change coupling mechanism, includes screw rod and reducing gear box, its characterized in that: the output shaft end of the reduction box is embedded in the end part (3) of the screw rod;

the output shaft end of the reduction gearbox comprises a cylindrical shaft head (1), and pin keys (2) are symmetrically arranged on the outer circumferential wall of the shaft head (1);

a central hole (4) is formed in the end portion (3) of the screw along the central axis of the screw, through grooves (5) are symmetrically formed in the outer wall of the end portion along the central axis of the screw, the top end of each through groove (5) is defined as one end far away from the screw, the bottom end of each through groove (5) is not in contact with the screw, a transverse groove (6) is formed in the bottom end of each through groove (5) along the radial direction of the screw, and the transverse grooves (6) are communicated with the through grooves (5) to form an L shape;

when the output shaft end of the reduction gearbox is screwed into the end part (3) of the screw rod, the transverse groove (6) and the through groove (5) are communicated to form an L-shaped structure matched with a pin key (2).

2. The quick-change coupling mechanism according to claim 1, characterized in that: the distance of the pin key (2) in the radial direction of the shaft head (1) is equal to the width of the through groove (5).

3. The quick-change coupling mechanism according to claim 1, characterized in that: the length of the pin key (2) in the central axis direction of the shaft head (1) is equal to the distance of the transverse groove (6) in the axial direction of the end part of the screw rod.

4. The quick-change coupling mechanism according to claim 1, characterized in that: the distance of the pin key (2) in the radial direction of the shaft head (1) is equal to the distance of the transverse groove (6) in the radial direction of the end part of the screw rod.

5. The quick-change coupling mechanism according to claim 1, characterized in that: the size of the shaft head (1) of the reduction gearbox is matched with the central hole (4) of the screw rod.