CN217551885U

CN217551885U - Overload protection structure

Info

Publication number: CN217551885U
Application number: CN202221270180.1U
Authority: CN
Inventors: 莫志勇
Original assignee: Jianyi Precision Equipment Jiangsu Co ltd
Current assignee: Jianyi Precision Equipment Jiangsu Co ltd
Priority date: 2022-05-24
Filing date: 2022-05-24
Publication date: 2022-10-11
Anticipated expiration: 2032-05-24

Abstract

An overload protection structure comprises a belt pulley, a flange plate, a belt pulley gland, steel balls, a first check ring, a belleville spring, a second check ring, a locking nut, an expansion sleeve and a flange plate gland; and a ball head hole is formed in the position of the belt pulley side edge where the steel ball is installed. In the equipment processing process, when the overload condition is met, namely the belt pulley is stressed too much and is far greater than the shaft rotating resistance, the disc spring can cause elastic deformation, the acting force of the first check ring on the steel ball is reduced, the steel ball comes out from a ball head hole of the belt pulley, namely the pressing force on the belt pulley is reduced, so that the belt pulley is subjected to in-situ slipping transfer, the output end of the motor is protected, and the motor is protected.

Description

Overload protection structure

Technical Field

The utility model relates to a machining center field especially relates to an overload protection structure.

Background

The numerical control machining center is a high-efficiency automatic machine tool which consists of mechanical equipment and a numerical control system and is suitable for machining complex parts.

The belt pulley transmission is one of the most widely applied transmission modes in machining center equipment, and has the characteristics of load impact alleviation, stable operation, low noise, low vibration and the like. However, in the using process of equipment, when a spindle is locked due to overload of a machine tool, the motor cannot be stopped in time, internal gears are easily damaged, and a belt driven by a belt pulley is broken, so that inevitable loss is caused.

SUMMERY OF THE UTILITY MODEL

Utility model purpose: the utility model aims at providing an overload protection structure has solved the damage problem to the motor when the overload condition appears in the numerical control machining center working process.

The technical scheme is as follows: the utility model provides an overload protection structure, including belt pulley, ring flange, band pulley gland, steel ball, first retaining ring, disc spring, second retaining ring, lock nut, bloated tight cover, ring flange gland, the belt pulley is installed on the ring flange, and one end is spacing through the band pulley gland that sets up at the ring flange tip, steel ball, first retaining ring, disc spring, second retaining ring, lock nut install the other end that the ring flange kept away from the band pulley gland in proper order, compress tightly the belt pulley other end, bloated tight cover sets up inside the ring flange and compresses tightly through the ring flange gland; the belt pulley is characterized in that a plurality of ball head holes which are circumferentially arrayed by taking the center of the belt pulley as the center are arranged at the positions of the steel balls arranged at the side edge of the belt pulley, the cross section of each ball head hole passing through the axis direction is in an arc shape, and the diameter of each ball head hole is the same as that of each steel ball. The belt pulley is directly sleeved on the flange plate, one end of the belt pulley is blocked by a belt pulley gland connected with the flange plate through a bolt, the steel ball at the other end of the belt pulley is arranged in the flange plate and is correspondingly placed in the ball head hole on the belt pulley, then the first retaining ring, the disc spring and the second retaining ring are sequentially arranged on the flange plate and are fixed through the locking nut, the disc spring is deformed under the pressure of the locking nut to generate thrust, at the moment, the end face of the first retaining ring is tangent to the steel ball, and the steel ball is tightly pressed in the ball head hole on the belt pulley. In the equipment processing process, when the overload condition is met, namely the belt pulley is stressed too much and is far greater than the shaft rotating resistance, the disc spring can cause elastic deformation, the acting force of the first check ring on the steel ball is reduced, the steel ball comes out from a ball head hole of the belt pulley, namely the pressing force on the belt pulley is reduced, so that the belt pulley is subjected to in-situ slipping transfer, the output end of the motor is protected, and the motor is protected. In addition, the flange has expansion sleeve inside, and during connection with the rotating shaft, the high strength screw bolt is screwed to transmit load with the pressure and friction between the holding surfaces.

Furthermore, the edge of the flange plate is provided with steel ball mounting holes which are uniformly distributed in a circumferential array by taking the center of the flange plate as the center. Used for placing steel balls.

Furthermore, the end part of the flange plate is also provided with four groups of first threaded holes which are arranged in a circumferential array by taking the center of the flange plate as the center. For fixing the pulley gland.

Furthermore, the end part of the flange plate is also provided with four groups of first counter sink holes which are arranged in a circumferential array by taking the center of the flange plate as the center. The expansion sleeve is used for being connected with the flange plate gland so as to fix the expansion sleeve inside the flange plate.

Furthermore, a tool withdrawal groove is formed in the flange plate. The end part of the flange plate is convenient to be close to the tool withdrawal groove for thread processing, so that the locking effect of the locking nut is convenient.

Furthermore, the belt wheel gland is provided with four groups of second counter bores which are arranged in a circumferential array by taking the center of the belt wheel gland as the center. The second counter sink on the belt wheel gland and the first threaded hole on the flange are correspondingly arranged and connected through bolts.

Furthermore, the flange plate gland is provided with four groups of second threaded holes which are arranged in a circumferential array by taking the center of the flange plate gland as the center. And the second threaded hole in the flange plate gland is arranged corresponding to the first countersunk hole in the flange plate and is connected with the first countersunk hole through a bolt.

Above-mentioned technical scheme can find out, the utility model discloses following beneficial effect has: 1) The belt pulley is characterized in that a plurality of ball head holes are formed in the side edge of the belt pulley, steel balls are correspondingly placed to compress the belt pulley, and the belleville springs are arranged, so that the steel balls slide out of the ball head holes of the belt pulley through the deformation characteristic of the belleville springs when stressed under the overload condition, the pressing force on the belt pulley is reduced, and the belt pulley can slide and rotate in situ, so that the acting force on the shaft end of the motor is reduced, the motor is protected, and the belt pulley has wide applicability; 2) Simple structure, low processing cost and convenient disassembly and assembly.

Drawings

Fig. 1 is a cross-sectional view of the present invention;

FIG. 2 is a cross-sectional view of a pulley;

fig. 3 is a cross-sectional view of the flange.

In the figure: the belt pulley comprises a belt pulley 1, a ball head hole 11, a flange plate 2, a steel ball mounting hole 21, a first threaded hole 22, a first counter bore 23, a tool withdrawal groove 24, a belt pulley gland 3, a second counter bore 31, a steel ball 4, a first retainer ring 5, a belleville spring 6, a second retainer ring 7, a locking nut 8, an expansion sleeve 9, a flange plate gland 10 and a second threaded hole 101.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "a plurality" means two or more unless explicitly defined otherwise.

In the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; 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 meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature "on," "above" and "over" the second feature may include the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Example one

As shown in fig. 1, the cross-sectional view of the present invention includes a belt pulley 1, a flange 2, a belt pulley gland 3, a steel ball 4, a first retainer ring 5, a disc spring 6, a second retainer ring 7, a lock nut 8, an expansion sleeve 9, and a flange gland 10, wherein the belt pulley 1 is mounted on the flange 2, one end of the belt pulley is limited by the belt pulley gland 3 arranged at the end of the flange 2, the steel ball 4, the first retainer ring 5, the disc spring 6, the second retainer ring 7, and the lock nut 8 are sequentially mounted at the other end of the flange 2 far away from the belt pulley gland 3, and compress the other end of the belt pulley 1, and the expansion sleeve 9 is arranged inside the flange 2 and is compressed by the flange gland 10; as shown in fig. 2, a cross-sectional view of the belt pulley 1 is provided, a plurality of ball head holes 11 are formed in the positions where the steel balls 4 are mounted on the side edges of the belt pulley 1, the ball head holes 11 are circumferentially arrayed with the center of the belt pulley 1 as the center, the cross section of each ball head hole 11 passing through the axial direction is arc-shaped, and the diameter of each ball head hole is the same as that of the steel ball 4.

As shown in fig. 3, which is a cross-sectional view of the flange 2, the edge of the flange is provided with steel ball mounting holes 21 which are uniformly distributed in a circumferential array with the center of the flange 2 as the center.

The end part of the flange plate 2 is also provided with four groups of first threaded holes 22, and the first threaded holes 22 are arranged in a circumferential array by taking the center of the flange plate 2 as the center.

The end part of the flange plate 2 is also provided with four groups of first counter sink holes 23, and the first counter sink holes 23 are arranged in a circumferential array by taking the center of the flange plate 2 as the center.

The flange plate 2 is provided with a tool withdrawal groove 24.

The belt wheel gland 3 is provided with four groups of second counter bores 31, and the second counter bores 31 are arranged in a circumferential array by taking the center of the belt wheel gland 3 as the center.

The flange plate gland 10 is provided with four groups of second threaded holes 101, and the second threaded holes 101 are arranged in a circumferential array by taking the center of the flange plate gland 10 as the center.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications can be made without departing from the principles of the present invention, and these modifications should also be regarded as the protection scope of the present invention.

Claims

1. An overload protection structure, characterized by: the belt pulley comprises a belt pulley (1), a flange plate (2), a belt pulley gland (3), steel balls (4), a first check ring (5), a disc spring (6), a second check ring (7), a locking nut (8), an expansion sleeve (9) and a flange plate gland (10), wherein the belt pulley (1) is installed on the flange plate (2), one end of the belt pulley (1) is limited by the belt pulley gland (3) arranged at the end part of the flange plate (2), the steel balls (4), the first check ring (5), the disc spring (6), the second check ring (7) and the locking nut (8) are sequentially installed at the other end, far away from the belt pulley gland (3), of the flange plate (2) to compress the other end of the belt pulley (1), and the expansion sleeve (9) is arranged inside the flange plate (2) and is compressed by the flange plate gland (10); wherein, belt pulley (1) side installation steel ball (4) position is equipped with a plurality of and uses belt pulley (1) center to be ball head hole (11) that the circumference array set up as the center, ball head hole (11) are the bow-shaped through the cross section of axis direction, and its diameter is the same with steel ball (4).

2. The overload protection structure of claim 1, wherein: the edge of the flange plate (2) is provided with steel ball mounting holes (21) which are uniformly distributed in a circumferential array by taking the center of the flange plate (2) as the center.

3. The overload protection structure according to claim 2, wherein: the end part of the flange plate (2) is also provided with four groups of first threaded holes (22), and the first threaded holes (22) are arranged in a circumferential array by taking the center of the flange plate (2) as the center.

4. The overload protection structure of claim 3, wherein: the end part of the flange plate (2) is also provided with four groups of first counter sink holes (23), and the first counter sink holes (23) are arranged in a circumferential array by taking the center of the flange plate (2) as the center.

5. The overload protection structure of claim 4, wherein: and a tool withdrawal groove (24) is formed in the flange plate (2).

6. The overload protection structure of claim 1, wherein: the belt wheel gland (3) is provided with four groups of second counter bores (31), and the four groups of second counter bores (31) are arranged in a circumferential array by taking the center of the belt wheel gland (3) as the center.

7. The overload protection structure according to claim 1, wherein: and second threaded holes (101) are formed in the flange plate gland (10), and the second threaded holes (101) are four groups in total and are circumferentially arranged in an array by taking the center of the flange plate gland (10) as the center.