CN213744452U

CN213744452U - Precise shaft core with torque overload protection structure

Info

Publication number: CN213744452U
Application number: CN202022842559.2U
Authority: CN
Inventors: 陈立川
Original assignee: Weihai Shangdi Machinery Technology Co ltd
Current assignee: Weihai Shangdi Machinery Technology Co ltd
Priority date: 2020-12-01
Filing date: 2020-12-01
Publication date: 2021-07-20
Anticipated expiration: 2030-12-01

Abstract

The utility model relates to an accurate axle core with moment of torsion overload protection structure, its axis body that extends about including, the inner chamber hole has been seted up to the right-hand member of axis body, rotates in the inner chamber hole and installs the axle core of extending about, and the rotation center line of axle core coincides with the axis of axis body, and the right-hand member of axle core outwards extends from the inner chamber hole, and the top spring hole has been seted up to axle core left end, and spacing ball is installed in the left side in top spring hole, sets up the spacing groove that corresponds with spacing ball on the diapire in inner chamber hole, installs the top spring of propping tight in the spacing groove with spacing ball in the top spring hole. The shaft core can block power transmission when the shaft body is overloaded by torque, and can avoid deformation of the shaft body caused by overload of the torque and damage of parts on the shaft. In addition, the limiting disc and the shaft core can be replaced, and the maximum torque borne by the shaft body can be adjusted, so that the shaft body has high universality.

Description

Precise shaft core with torque overload protection structure

Technical Field

The utility model relates to a machine parts field, specific accurate axle core with moment of torsion overload protection structure that says so.

Background

The shaft is a common fitting for mechanical equipment, can support and rotate with rotating parts to transmit motion, torque or bending moment, is generally in the shape of a metal round rod, and each section can have different diameters, and the precision shaft is a fitting with higher transmission requirements on the precision shaft, and the precision equipment has higher requirements on the precision shaft.

The maximum torque which can be borne by the precision shaft is constant, and if the maximum torque exceeds the limit value which can be borne by the precision shaft, the precision shaft can be damaged irreversibly, particularly, the precision shaft is deformed when the shaft body is overloaded or parts on the shaft are damaged.

Disclosure of Invention

The utility model aims at the above-mentioned problem provide a precision axle core with moment of torsion overload protection structure.

In order to achieve the above object, the utility model relates to an accurate axle core with moment of torsion overload protection structure, including controlling the axis body that extends, its structural feature is: the right end of the shaft body is provided with an inner cavity hole, a shaft core extending left and right is rotatably installed in the inner cavity hole, the right end of the shaft core extends outwards from the inner cavity hole, the left end of the shaft core is provided with a top spring hole, a limiting ball is installed on the left side of the top spring hole, a limiting groove corresponding to the limiting ball is formed in the bottom wall of the inner cavity hole, and a top spring for tightly jacking the limiting ball in the limiting groove is installed in the top spring hole.

After the structure is adopted, the shaft body is provided with the inner cavity hole, the shaft core for transmitting power is arranged in the inner cavity hole, the shaft core is provided with a limit ball matched with the limit groove, when the torque born by the shaft body is in a reasonable range, the shaft core and the shaft body are relatively fixed and do not move relatively, when the torque borne by the shaft body exceeds a limit value, the limiting ball retracts into the top spring hole against the jacking force of the spring, at the moment, the limit ball is not clamped in the limit groove, the shaft core and the shaft body can rotate relatively, the shaft body can not transmit torque, when the torque is reduced and is restored to the normal size again, the top spring pushes the limit ball tightly in the limit groove, the shaft body is restored to the state of normal torque transmission, the structure can block the power transmission when the shaft body is overloaded by the torque, and the shaft body can return to the initial state when the torque is recovered, so that the deformation of the shaft body caused by overload of the bearing torque and the damage of parts on the shaft can be avoided.

The rotation center line of the shaft core coincides with the axis of the shaft body with respect to the rotation direction of the shaft core.

Regarding the structure of the inner cavity hole, the section of the inner cavity hole is in a circular hole shape, and the shaft core is in a cylindrical shape with the diameter and the length both matched with the inner cavity hole.

In order to provide a limiting groove conveniently, the bottom of the inner cavity hole is provided with a positioning hole, the positioning hole is in a polygonal shape, a limiting disc is clamped in the positioning hole, and the limiting groove is formed in the right side wall of the limiting disc. The limiting groove is formed in the limiting disc, the limiting disc can be replaced, and the maximum torque which can be borne by the shaft body can be adjusted by replacing different limiting discs and shaft cores. More specifically, different spacing dish and axle core have not equidimension spacing groove and spacing ball, through the maximum torque that the spacing ball control axis body of adjustment can bear, perhaps adjust the installation quantity of spacing ball, or change spacing ball into the stopper that has the inclined plane again, the spacing groove set to can with the spacing hole of stopper matched with.

Regarding the structure of top spring hole, a plurality of have been seted up in top spring hole, and a plurality of top spring holes are equidistant around the rotation center line of axle core and are arranged, have seted up a plurality of spacing grooves on the spacing dish, and the spacing groove is with top spring hole one-to-one. The spring-pushing hole and the limiting groove are far away from the rotation center line of the shaft core.

Regarding the specific structure of the limiting groove, the limiting groove is hemispherical with the size matched with the limiting ball, one end of the top spring is propped against the bottom wall of the top spring hole, and the other end of the top spring is propped against the limiting ball.

Regarding the realization of the rotating structure of the shaft core, an end cover is arranged on the shaft body and buckled at the right end of the shaft body, a bearing is installed in the end cover, the bearing is sleeved on the shaft core, the outer ring of the bearing is fixedly connected with the end cover, and the inner ring of the bearing is fixedly connected with the shaft core.

Regarding the mounting structure of spacing dish and end cover, the bottom of locating hole is seted up screw hole one, is equipped with the screw that passes spacing dish and spiral shell dress in screw hole one on the spacing dish, sets up screw hole two on the right-hand member lateral wall of axis body, is equipped with the bolt that passes end cover and spiral shell dress in screw hole two on the end cover.

Because above-mentioned technical scheme's application is following right the utility model discloses an advantage effect carries out concrete analysis.

To sum up, the utility model is provided with an inner cavity hole on the shaft body, a shaft core used for transmitting power is arranged in the inner cavity hole, the shaft core is provided with a limit ball matched with the limit groove, when the torque born by the shaft body is in a reasonable range, the shaft core and the shaft body are relatively fixed and do not move relatively, when the torque borne by the shaft body exceeds a limit value, the limiting ball retracts into the top spring hole against the jacking force of the spring, at the moment, the limit ball is not clamped in the limit groove, the shaft core and the shaft body can rotate relatively, the shaft body can not transmit torque, when the torque is reduced and is restored to the normal size again, the top spring pushes the limit ball tightly in the limit groove, the shaft body is restored to the state of normal torque transmission, the structure can block the power transmission when the shaft body is overloaded by the torque, the shaft body can return to the initial state when the torque is recovered, so that the deformation of the shaft body caused by the overload of the bearing torque and the damage of parts on the shaft can be avoided; in addition, the limiting disc and the shaft core can be replaced, and the maximum torque borne by the shaft body can be adjusted, so that the shaft body has high universality.

Drawings

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings:

fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the configuration of the bore;

FIG. 3 is a schematic structural view of a limiting plate;

FIG. 4 is a schematic cross-sectional view taken along line A-A of FIG. 3;

FIG. 5 is a schematic structural view of a shaft core;

fig. 6 is a schematic sectional view taken along line B-B in fig. 5.

In the figure: the shaft body 1, the limiting disc 2, the shaft core 3, the top spring hole 4, the limiting ball 5, the top spring 6, the bearing 7, the end cover 8, the bolt 9, the inner cavity hole 10, the first threaded hole 11, the limiting groove 12, the positioning hole 13, the second threaded hole 14 and the screw 15.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention.

The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention.

All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to the drawings, the utility model discloses an accurate axle core with moment of torsion overload protection structure, including controlling the axis body 1 that extends, inner chamber hole 10 has been seted up to the right-hand member of axis body 1, rotate in the inner chamber hole 10 and install the axle core 3 of controlling the extension, the rotation center line of axle core 3 and the axis coincidence of axis body 1, the right-hand member of axle core 3 is outwards stretched out from inner chamber hole 10, top spring hole 4 has been seted up to 3 left ends of axle core, spacing ball 5 is installed in the left side of top spring hole 4, set up the spacing groove 12 corresponding with spacing ball 5 on the diapire of inner chamber hole 10, install in the top spring hole 4 and push up the top spring 6 tight in spacing groove 12 with spacing ball 5. After the structure is adopted, referring to the attached drawing 1, an inner cavity hole 10 is arranged on a shaft body 1, a shaft core 3 used for transmitting power is arranged in the inner cavity hole 10, a limiting ball 5 matched with a limiting groove 12 is arranged on the shaft core 3, when the torque borne by the shaft body 1 is within a reasonable range, the shaft core 3 and the shaft body 1 are relatively fixed and do not move relatively, when the torque borne by the shaft body 1 exceeds a limiting value, the limiting ball 5 overcomes the jacking force of a spring and retracts into a top spring hole 4, at the moment, the limiting ball 5 is not clamped in the limiting groove 12, the shaft core 3 and the shaft body 1 can rotate relatively, the shaft body 1 does not transmit the torque any more, when the torque is reduced and is restored to a normal size again, the jacking spring 6 jacks the limiting ball 5 in the limiting groove 12, the shaft body 1 is restored to a normal torque transmission state, and the structure can block the power transmission when the shaft body 1 is overloaded by the torque, and can get back to initial condition when the moment of torsion size resumes, can avoid the axis body 1 because of bearing the deformation that moment of torsion overload produced and the damage of epaxial part.

Regarding the structure of the inner cavity hole 10, referring to fig. 2, the cross section of the inner cavity hole 10 is circular hole-shaped, and the shaft core 3 is cylindrical with a diameter and a length both matching with the inner cavity hole 10. In order to provide the limiting groove 12 conveniently, the bottom of the inner cavity hole 10 is provided with a positioning hole 13, the positioning hole 13 is in a polygonal shape, the limiting disc 2 is clamped in the positioning hole 13, and the limiting groove 12 is arranged on the right side wall of the limiting disc 2. Spacing groove 12 is seted up on spacing dish 2, and spacing dish 2 can be changed, through changing different spacing dish 2 and axle core 3, the maximum torque that the adjustable axis body 1 can bear. More specifically, different spacing dish 2 and axle core 3 have not equidimension spacing groove 12 and spacing ball 5, through the maximum torque that can bear of adjustment spacing ball 5 control axis body 1, perhaps adjust spacing ball 5's installation quantity, or change spacing ball 5 into the stopper that has the inclined plane again or, spacing groove 12 sets up to the spacing hole that can with stopper matched with.

Regarding the structure of the top spring hole 4, referring to fig. 5, a plurality of top spring holes 4 are formed, the plurality of top spring holes 4 are arranged at equal intervals around the rotation center line of the shaft core 3, a plurality of limiting grooves 12 are formed on the limiting disc 2, and the limiting grooves 12 correspond to the top spring holes 4 one to one. Regarding the specific structure of the limiting groove 12, referring to fig. 4, the limiting groove 12 is a hemispherical shape with a size matched with the limiting ball 5, one end of the top spring 6 abuts against the bottom wall of the top spring hole 4, and the other end abuts against the limiting ball 5.

Regarding the realization of the rotating structure of the shaft core 3, referring to fig. 1, an end cover 8 is arranged on the shaft body 1, the end cover 8 is buckled at the right end of the shaft body 1, a bearing 7 is installed in the end cover 8, the bearing 7 is sleeved on the shaft core 3, the outer ring of the bearing 7 is fixedly connected with the end cover 8, and the inner ring of the bearing 7 is fixedly connected with the shaft core 3.

Regarding the mounting structure of the limiting disc 2 and the end cover 8, referring to fig. 1, a first threaded hole 11 is formed in the bottom of the positioning hole 13, a screw 15 which penetrates through the limiting disc 2 and is screwed in the first threaded hole 11 is arranged on the limiting disc 2, a second threaded hole 14 is formed in the side wall of the right end of the shaft body 1, and a bolt 9 which penetrates through the end cover 8 and is screwed in the second threaded hole 14 is arranged on the end cover 8.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

To sum up, the present invention is not limited to the above-mentioned specific embodiments. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications are intended to be within the scope of the present invention.

Claims

1. The utility model provides a precision axle core with moment of torsion overload protection structure, includes the axis body (1) of extending about, characterized by: inner chamber hole (10) have been seted up to the right-hand member of axis body (1), rotate in inner chamber hole (10) and install axle core (3) of controlling the extension, the right-hand member of axle core (3) is outwards stretched out from inner chamber hole (10), top spring hole (4) have been seted up to axle core (3) left end, spacing ball (5) are installed in the left side of top spring hole (4), spacing groove (12) corresponding with spacing ball (5) have been seted up on the diapire of inner chamber hole (10), install in top spring hole (4) and push up spring (6) tight in spacing groove (12) with spacing ball (5).

2. The precision shaft core with a torque overload protection structure according to claim 1, wherein: the rotation center line of the shaft core (3) is superposed with the axis of the shaft body (1).

3. The precision shaft core with a torque overload protection structure according to claim 2, wherein: the cross section of the inner cavity hole (10) is in a circular hole shape, and the shaft core (3) is in a cylindrical shape with the diameter and the length matched with the inner cavity hole (10).

4. The precision shaft core with a torque overload protection structure according to claim 3, wherein: the bottom of the inner cavity hole (10) is provided with a positioning hole (13), the positioning hole (13) is in a polygonal shape, the positioning hole (13) is clamped with the limiting disc (2), and the limiting groove (12) is formed in the right side wall of the limiting disc (2).

5. The precision shaft core with a torque overload protection structure according to claim 4, wherein: the top spring hole (4) is provided with a plurality of top spring holes (4), the top spring holes (4) are arranged around the rotating center line of the shaft core (3) at equal intervals, a plurality of limiting grooves (12) are formed in the limiting disc (2), and the limiting grooves (12) correspond to the top spring holes (4) one to one.

6. The precision shaft core with a torque overload protection structure according to claim 5, wherein: the limiting groove (12) is hemispherical, the size of the limiting groove is matched with that of the limiting ball (5), one end of the top spring (6) abuts against the bottom wall of the top spring hole (4), and the other end of the top spring abuts against the limiting ball (5).

7. The precision shaft core with a torque overload protection structure according to claim 6, wherein: the shaft body (1) is provided with an end cover (8), the end cover (8) is buckled at the right end of the shaft body (1), a bearing (7) is installed in the end cover (8), the bearing (7) is sleeved on the shaft core (3), the outer ring of the bearing (7) is fixedly connected with the end cover (8), and the inner ring of the bearing (7) is fixedly connected with the shaft core (3).

8. The precision shaft core with a torque overload protection structure according to claim 7, wherein: the bottom of locating hole (13) is seted up screw hole (11) one, is equipped with on spacing dish (2) and passes spacing dish (2) and spiral shell dress screw (15) in screw hole (11), sets up screw hole two (14) on the right-hand member lateral wall of axis body (1), is equipped with on end cover (8) and passes end cover (8) and spiral shell dress bolt (9) in screw hole two (14).