Lifting adjusting mechanism of straightening machine

Abstract

The utility model discloses a straightening machine lifting adjusting mechanism, and relates to the technical field of straightening machines. The device comprises a top plate, an upper roller seat cover plate, a worm and gear elevator, a precision screw rod, a precision nut, an encoder and a variable frequency motor, the worm and gear elevator is vertically fixed to the top end of the top plate and comprises a worm gear and a worm, and the worm gear is provided with internal threads. The precision nut is vertically fixed at the bottom end of the upper roller seat cover plate; the upper end of the precise lead screw penetrates through the worm gear and is in threaded fit with an internal thread of the worm gear, the lower end of the precise lead screw sequentially penetrates through the top plate and the precise nut and abuts against the upper roller seat cover plate, and the precise lead screw is in threaded connection with the precise nut; the encoder and the variable frequency motor are connected with the worm. According to the straightening machine lifting adjusting mechanism, the lifting adjusting precision is improved, and the service life of a worm and gear lifting machine is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of straightening machines, in particular to a lifting and adjusting mechanism for a straightening machine. Background Art

[0002] A straightening machine extrudes metal materials through multiple straightening rollers to change their straightness, thereby improving the flatness and quality of the metal materials. Existing straightening machines usually have two rows of straightening rollers, upper and lower, and a lifting mechanism for adjusting the distance between the two rows of straightening rollers.

[0003] For example, Chinese patent document CN203807050U discloses a lifting mechanism for a vertical two-roller straightening machine. The lifting mechanism includes a cylinder device, a top plate, an upper pressure beam, and a worm and worm gear lift device. The worm and worm gear lift device includes four worm and worm gear lifts. This lifting mechanism adjusts the working position of the upper roller connected to the upper pressure beam through four worm and worm gear lifts. This lifting mechanism has the following deficiencies: 1. The worms of the four worm and worm gear lifts are connected to the lead screws through lead screw sleeves. One end of the lead screw is fixed to the lower end face of the top plate, and the other end is arranged in a through hole on the upper pressure beam. During the operation of the straightening machine, every time the metal material passes through the upper roller, the reaction force will impact the upper roller, and the impact force is directly transmitted to the worm of the worm and worm gear lift through the upper pressure beam. After a period of use, the worm is easily damaged; 2. The lack of precision lead screws and precision nuts results in low adjustment accuracy and the inability to precisely adjust the distance between the two rows of straightening rollers. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide a lifting and adjusting mechanism for a straightening machine, which improves the lifting and adjusting accuracy and prolongs the service life of the worm and worm gear lift.

[0005] To solve the above technical problem, the utility model adopts the following technical solutions:

[0006] A lifting and adjusting mechanism for a straightening machine includes a top plate, an upper roller seat cover plate, a worm and worm gear lift, a precision lead screw, a precision nut, an encoder, and a variable frequency motor. The worm and worm gear lift is vertically fixed at the top end of the top plate. The worm and worm gear lift includes a worm and a worm gear, and the worm has an internal thread. The precision nut is vertically fixed at the bottom end of the upper roller seat cover plate. The upper end of the precision lead screw passes through the worm and is in threaded cooperation with the internal thread of the worm. The lower end passes through the top plate and the precision nut in sequence and abuts against the upper roller seat cover plate, and the precision lead screw is in threaded connection with the precision nut. The encoder and the variable frequency motor are connected to the worm gear.

[0007] As a further elaboration of the above technical solution:

[0008] In the above technical solution, four worm and worm gear lifters are provided. The four worm and worm gear lifters are respectively arranged at the four corners of the upper roll seat cover plate, and a rotating component is connected between the two worm and worm gear lifters in each row; the encoder is installed at one end of the upper roll seat cover plate and is connected to the worm of the worm and worm gear lifter at that end; the variable frequency motor is installed at the other end of the upper roll seat cover plate and is connected to the worm of the worm and worm gear lifter at that end.

[0009] In the above technical solution, the rotating component includes a first rod sleeve, a first connecting rod, a coupling, a second connecting rod and a second rod sleeve which are fixedly connected in sequence. The first rod sleeve is fixedly connected to the worm of the worm and worm gear lifter at one end, and the second rod sleeve is fixedly connected to the worm of the worm and worm gear lifter at the other end.

[0010] In the above technical solution, a display screen is further included, and the display screen is electrically connected to the encoder.

[0011] In the above technical solution, a head pad is fixedly connected below the precision lead screw at the top end of the upper roll seat cover plate.

[0012] Compared with the prior art, the utility model at least achieves the following beneficial effects:

[0013] The precision nut is fixed at the bottom end of the upper roll seat cover plate. The upper end of the precision lead screw passes through the worm wheel and is in threaded fit with the internal thread of the worm wheel. The lower end passes through the top plate and the precision nut in sequence, is threadedly connected to the precision nut and finally abuts against the upper roll seat cover plate. The variable frequency motor drives the worm and the worm wheel to move, thereby driving the precision lead screw to lift and lower. The lifting amount is adjusted by the worm and the worm wheel driving the precision lead screw through the precision nut, and the lifting amount data can be fed back to an external display device through the encoder for adjustment, so as to achieve the purpose of precisely adjusting the lifting amount; after the lower end of the precision lead screw is threadedly connected to the precision nut and then abuts against the upper roll seat cover plate, when the metal material passes through the upper straightening roller, the reaction force will be separated by the precision nut, thereby avoiding directly impacting the worm wheel of the worm and worm gear lifter and prolonging the service life of the worm and worm gear lifter. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic structural diagram of this embodiment;

[0015] Figure 2 is a front view of this embodiment;

[0016] Figure 3 is a schematic diagram of the use of this embodiment in a straightening machine.

[0017] The reference numerals in the figure are: 1, top plate; 2, upper roller seat cover plate; 3, worm gear lift; 31, worm; 4, precision lead screw; 5, precision nut; 6, encoder; 7, variable frequency motor; 8, rotating assembly; 81, first rod sleeve; 82, first connecting rod; 83, coupling; 84, second connecting rod; 85, second rod sleeve; 9, head pad; 10, upper roller seat; 20, upper straightening roller. Detailed implementation manners

[0018] The present invention will be described in detail below with reference to the exemplary embodiments in the accompanying drawings. It should be understood, however, that the present application can be implemented in many different forms and should not be construed as limited to the embodiments set forth herein. These embodiments are provided herein to make the disclosure of the present application more complete and to fully convey the concept of the present application to those skilled in the art.

[0019] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, the meaning of "a number of" and "a plurality of" is two or more, unless otherwise specifically and clearly defined. In the present application, unless otherwise clearly stipulated and defined, the terms such as "installed", "connected", "connected to", "fixed" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances. In the present application, unless otherwise clearly stipulated and defined, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "over" and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "beneath" and "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0020] Such as Figures 1 to 3As shown in the figure, a lifting and adjusting mechanism for a straightening machine includes a top plate 1, an upper roll seat cover plate 2, a worm and worm gear lift 3, a precision lead screw 4, a precision nut 5, an encoder 6, a variable frequency motor 7, and a display screen. The two ends of the upper roll seat cover plate 2 are fixedly connected to the top of the upper roll seat 10, and the upper straightening roll 20 is rotatably connected to the upper roll seat 10. The worm and worm gear lift 3 is vertically fixed to the top end of the top plate 1. The worm and worm gear lift 3 includes a worm gear and a worm 31, and the worm gear is provided with an internal thread. The precision nut 5 is vertically fixed to the bottom end of the upper roll seat cover plate 2. The upper end of the precision lead screw 4 passes through the worm gear and is threadedly engaged with the internal thread of the worm gear. The lower end passes through the top plate 1 and the precision nut 5 in sequence and abuts against the upper roll seat cover plate 2, and the precision lead screw 4 is threadedly connected to the precision nut 5. The encoder 6 and the variable frequency motor 7 are connected to the worm 31. The display screen is electrically connected to the encoder 6, and the encoder 6 feeds back the lifting amount data to the display screen, which is convenient for adjustment through the display screen.

[0021] Optionally, four worm and worm gear lifts 3 are provided. The four worm and worm gear lifts 3 are respectively arranged at the four corners of the upper roll seat cover plate 2, and a rotating assembly 8 is connected between the two worm and worm gear lifts 3 in each row. The encoder 6 is installed at one end of the upper roll seat cover plate 2 and is connected to the worm 31 of the worm and worm gear lift 3 at that end. The variable frequency motor 7 is installed at the other end of the upper roll seat cover plate 2 and is connected to the worm 31 of the worm and worm gear lift 3 at that end. Further, the rotating assembly 8 includes a first rod sleeve 81, a first connecting rod 82, a coupling 83, a second connecting rod 84, and a second rod sleeve 85 that are fixedly connected in sequence. The first rod sleeve 81 is fixedly connected to the worm 31 of the worm and worm gear lift 3 at one end, and the second rod sleeve 85 is fixedly connected to the worm 31 of the worm and worm gear lift 3 at the other end. The four worm and worm gear lifts 3 are evenly distributed, improving the stability of the upper roll seat cover plate 2 during operation.

[0022] Optionally, a head pad 9 is fixedly connected below the precision lead screw 4 at the top end of the upper roll seat cover plate 2, and the head pad 9 supports the lower end of the precision lead screw 4.

[0023] The working principle of the present utility model is as follows:

[0024] The worm 31 and the worm gear are driven by the variable frequency motor 7 to drive the precision lead screw 4 to lift. The lifting amount is adjusted by the worm 31 and the worm gear driving the precision lead screw 4 through the precision nut 5, and the lifting amount data can be fed back to an external display screen through the encoder 6 for adjustment, so as to achieve the purpose of precisely adjusting the lifting amount of the upper straightening roll 20. After the lower end of the precision lead screw 4 is threadedly connected to the precision nut 5 and then abuts against the upper roll seat cover plate 2, when the metal material passes through the upper straightening roll 20, the reaction force will be separated by the precision nut 5, thus avoiding directly impacting the worm gear of the worm and worm gear lift 3 and extending the service life of the worm and worm gear lift 3.

[0025] It should be understood that all of the above embodiments are exemplary rather than restrictive. Under the concept of the present utility model, any modifications, equivalent changes, and decorations made to the specific embodiments described above by those skilled in the art still fall within the scope of the technical solution of the present utility model.

Claims

1. A lifting and adjusting mechanism for a straightening machine, characterized in that: It includes a top plate (1), an upper roller seat cover plate (2), a worm and worm gear lift (3), a precision lead screw (4), a precision nut (5), an encoder (6) and a variable frequency motor (7); the worm and worm gear lift (3) is vertically fixed at the top of the top plate (1), the worm and worm gear lift (3) includes a worm wheel and a worm (31), and the worm wheel is provided with an internal thread; the precision nut (5) is vertically fixed at the bottom end of the upper roller seat cover plate (2); the upper end of the precision lead screw (4) passes through the worm wheel and is in threaded fit with the internal thread of the worm wheel, the lower end passes through the top plate (1) and the precision nut (5) in sequence and abuts against the upper roller seat cover plate (2), and the precision lead screw (4) is in threaded connection with the precision nut (5); the encoder (6) and the variable frequency motor (7) are connected to the worm (31).

2. The leveling machine lifting adjustment mechanism according to claim 1, wherein: Four worm and worm gear lifts (3) are provided, and the four worm and worm gear lifts (3) are respectively arranged at the four corners of the upper roller seat cover plate (2), and a rotating assembly (8) is connected between the two worm and worm gear lifts (3) in each row; the encoder (6) is installed at one end of the upper roller seat cover plate (2) and is connected to the worm (31) of the worm and worm gear lift (3) at that end; the variable frequency motor (7) is installed at the other end of the upper roller seat cover plate (2) and is connected to the worm (31) of the worm and worm gear lift (3) at that end.

3. The leveling machine lifting adjustment mechanism according to claim 2, wherein: The rotating assembly (8) includes a first rod sleeve (81), a first connecting rod (82), a coupling (83), a second connecting rod (84) and a second rod sleeve (85) which are fixedly connected in sequence. The first rod sleeve (81) is fixedly connected to the worm (31) of the worm and worm gear lift (3) at one end, and the second rod sleeve (85) is fixedly connected to the worm (31) of the worm and worm gear lift (3) at the other end.

4. The leveling machine lifting and adjusting mechanism according to claim 1, characterized in that: It further includes a display screen, and the display screen is electrically connected to the encoder (6).

5. The leveling machine lifting adjustment mechanism according to claim 1, characterized in that: A head pad (9) is fixedly connected below the precision lead screw (4) at the top end of the upper roller seat cover plate (2).

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