Flywheel radial positioning mechanism for direct-drive electric screw press

Abstract

The utility model relates to a flywheel radial positioning mechanism for a direct-drive electric screw press, and belongs to the field of screw presses, the flywheel radial positioning mechanism is connected between an upper cross beam and a screw, the upper end of the screw penetrates through the upper cross beam to be connected with a flywheel, the flywheel radial positioning mechanism comprises a rotating bearing, and the rotating bearing is connected between the screw and the upper cross beam; the fixed seat is connected to the lower end surface of the upper cross beam; the lower shaft sleeve is positioned below the rotating bearing and is connected between the fixed seat and the screw rod; the upper positioning assembly is located above the rotating bearing and connected between the upper cross beam and a hub of the flywheel, the upper shaft sleeve, the lower shaft sleeve and the rotating bearing between the upper shaft sleeve and the lower shaft sleeve are arranged, and compared with the rotating bearing, two-point positioning of the flywheel is achieved through positioning of the upper side and the lower side of the upper shaft sleeve and the lower shaft sleeve; radial swing of the flywheel caused by large inertia kinetic energy is reduced, meanwhile, the eccentric wear degree of the flywheel and the motor rotor is reduced, and the problems of debugging failure, machine damage and the like are avoided.

Description

Technical Field

[0001] The utility model relates to the field of screw presses, in particular to a flywheel radial positioning mechanism for a direct-drive electric screw press. Background Art

[0002] A screw press is a forging machine that primarily uses a screw and nut as a transmission mechanism, transforming the forward and reverse rotational motion of a flywheel into the up and down reciprocating motion of a slider through a screw drive. The flywheel's function is to accelerate rotation to store energy, converting this stored rotational kinetic energy into impact energy before ultimately slowing down or even stopping the machine. To maximize energy storage, the flywheel's diameter is typically larger than that of the screw, resulting in greater inertial kinetic energy during rotation and a higher transmission ratio. However, this large diameter also places high demands on stability to prevent oscillation, which can exacerbate wear between the shafts. This is especially true before the screw and slider are assembled, when the screw is not properly positioned. During open-loop and closed-loop motor commissioning, the flywheel and motor rotor experience significant radial oscillation, which can easily cause motor bore scavenging and uneven wear of the sleeve. In severe cases, this can lead to commissioning failures and machine damage. Utility Model Content

[0003] The screw of the screw press needs to be debugged in open and closed loop rotation between the screw and the slider. However, the screw is not positioned properly at this time, and the motor will produce large radial swing when driving the flywheel to rotate, which can easily cause the motor to sweep the bore and the sleeve to wear unevenly. In severe cases, it may also lead to debugging failure and machine damage. At least one aspect or one purpose of the present application can solve the above problems. Specifically, a flywheel radial positioning mechanism for a direct-drive electric screw press is designed, and the technical solution adopted is as follows:

[0004] A flywheel radial positioning mechanism for a direct-drive electric screw press is connected between an upper crossbeam and a screw, wherein the upper end of the screw passes through the upper crossbeam and is connected to the flywheel, comprising:

[0005] A rotating bearing is connected between the screw and the upper beam;

[0006] A fixing seat connected to the lower end surface of the upper crossbeam;

[0007] A lower sleeve, which is located below the rotating bearing and connected between the fixing seat and the screw;

[0008] The upper positioning assembly is located above the rotating bearing and is connected between the upper crossbeam and the hub of the flywheel.

[0009] Preferably, the upper positioning assembly includes:

[0010] A fixed sleeve, which is arranged on the upper crossbeam;

[0011] The upper shaft sleeve is fixed to the inner wall of the fixed sleeve and is arranged on the periphery of the flywheel hub.

[0012] Preferably, the gap between the upper sleeve and the hub of the flywheel is between 0.2-0.3 mm.

[0013] Preferably, the upper sleeve and the fixing sleeve are fixed by means of set screws.

[0014] Preferably, the inner wall of the upper sleeve is provided with a plurality of oil grooves along its circumference.

[0015] Preferably, the fixing seat extends in a direction away from the upper crossbeam, and a slider guide hole is provided at a position of the fixing seat corresponding to the center axis thereof, for the slider to partially extend into the interior thereof.

[0016] Preferably, the fixing seat is further provided with two auxiliary guide holes, which are symmetrically arranged on both sides of the guide hole of the slider.

[0017] The utility model provides an upper shaft sleeve and a lower shaft sleeve and a rotating bearing therebetween. With respect to the rotating bearing, the positioning of the upper and lower sides enables the flywheel to form two-point positioning, thereby reducing the radial swing of the flywheel caused by the large inertial kinetic energy, and also reducing the degree of eccentric wear of the flywheel and the motor rotor, thereby avoiding the occurrence of problems such as debugging failure and machine damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is the main view of the utility model;

[0019] Figure 2 It is a structural diagram of the upper positioning component;

[0020] Figure 3 yes Figure 2 Enlarged view of point I in the middle.

[0021] In the figure, 1, upper beam, 2, flywheel, 3, screw, 4, lower sleeve, 5, rotating bearing, 6, upper positioning assembly, 601, fixed sleeve, 602, upper sleeve, 7, fixed seat, 8, slider guide hole, 9, auxiliary guide hole, 10, slider, 11, set screw. DETAILED DESCRIPTION

[0022] In order to clearly illustrate the technical features of this solution, the present invention is described in detail below through specific implementation methods and in conjunction with the accompanying drawings.

[0023] In addition, in the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0024] like Figure 1-3 As shown, a flywheel radial positioning mechanism for a direct-drive electric screw press is connected between an upper crossbeam 1 and a screw 3. The upper end of the screw 3 passes through the upper crossbeam 1 and is connected to a flywheel 2. The flywheel 2 is connected to the rotor of the motor, so that the motor directly drives the flywheel 2 to rotate, thereby driving the screw 3 to rotate. The lower end of the screw 3 and the slider 10 are constrained by a spiral pair. The rotation of the screw 3 causes the slider 10 to move up and down, thereby striking the workpiece. The above-mentioned radial positioning mechanism mainly plays a greater role before the screw 3 and the slider 10 are assembled, reducing the radial swing of the flywheel 2 and the motor rotor at this time, while also reducing the degree of eccentric wear of the flywheel 2 and the motor rotor. It specifically includes a rotating bearing 5, a fixed seat 7, a lower sleeve 4 and an upper positioning assembly 6. Among them, the rotating bearing 5 is connected between the screw 3 and the upper beam 1, so that the screw 3 can rotate relative to the upper beam 1. At the same time, the rotating bearing 5 can also serve the purpose of positioning the screw 3 to a certain extent. However, since the flywheel 2 is located above the rotating bearing 5, the radial swing of the flywheel 2 and the motor rotor just causes the rotating bearing 5 to suffer serious eccentric wear. In order to reduce the wear here, an upper positioning assembly 6 is provided on the upper side of the rotating bearing 5, and a lower sleeve 4 is provided on the lower side to position the flywheel 2 and the motor rotor at two points, thereby reducing the wear caused by its radial swing.

[0025] Specifically, the fixing seat 7 is bolted to the lower end surface of the upper crossbeam 1 and extends downward therefrom. A lower sleeve 4 is fixed to the central axis of the fixing seat 7. The lower sleeve 4 is screwed to the fixing seat 7. The screw 3 passes through the lower sleeve 4 and is rotatably connected to the lower sleeve 4. Simultaneously, the upper positioning assembly 6 is located above the rotating bearing 5 and connected between the upper crossbeam 1 and the hub of the flywheel 2. Specifically, the upper positioning assembly 6 and the hub of the flywheel 2 form a rotating pair constraint to ensure the operation of the flywheel 2. The upper positioning assembly 6 is arranged on the periphery of the flywheel 2 hub to increase the positioning points of the flywheel 2, thereby stabilizing the flywheel 2 and reducing its radial swing.

[0026] Furthermore, the upper positioning assembly 6 specifically includes a fixed sleeve 601 and an upper shaft sleeve 602. The fixed sleeve 601 is fixed to the upper crossbeam 1 by screws, and the upper shaft sleeve 602 is fixed to the inner wall of the fixed sleeve 601 by a set screw 11. The hub of the flywheel 2 is rotatably connected to the upper shaft sleeve 602. The upper shaft sleeve 602 and the hub of the flywheel 2 are constrained by a rotating pair, which can not only ensure relative rotation, but also increase the positioning points. It cooperates with the lower shaft sleeve 4 to form a two-point constraint on the upper and lower sides of the rotating bearing 5, thereby improving the stability of the flywheel 2 and the motor rotor during driving and debugging, reducing its radial swing, and thus reducing the wear caused thereby.

[0027] Furthermore, the gap between the upper sleeve 602 and the hub of the flywheel 2 is set to be between 0.2-0.3 mm, which can ensure relative rotation without reducing the positioning effect due to a too large gap.

[0028] Furthermore, in order to reduce the lubrication between the upper sleeve 602 and the hub of the flywheel 2, a plurality of oil grooves are provided on the inner wall of the upper sleeve 602 along its circumference. The number of the oil grooves is set according to the axial length of the sleeve, and the number of the oil grooves increases as the axial length of the sleeve increases.

[0029] Furthermore, in order to enable the slider 10 to further increase the limitation on the screw 3 and reduce the radial swing of the screw 3 after the screw 3 and the slider 10 are assembled, the above-mentioned fixed seat 7 extends in the direction away from the upper beam 1, and the fixed seat 7 is provided with a slider guide hole 8 corresponding to the position of the axis thereof, for the slider 10 to partially extend into the interior thereof. On the one hand, the slider 10 is threadedly connected to the screw 3, and at the same time, the slider 10 also extends into the slider guide hole 8. The slider guide hole 8 can limit the radial swing of the screw 3 while ensuring axial movement.

[0030] Furthermore, in order to further reduce the radial swing of the screw 3 and the flywheel 2 thereon, two auxiliary guide holes 9 are also provided on the above-mentioned fixed seat 7. The two auxiliary guide holes 9 are symmetrically arranged on both sides of the slider guide hole 8. The two auxiliary guide holes 9 cooperate with the slider guide hole 8 to form three constraints on the screw 3 in the radial direction, thereby increasing the resistance (reaction force) when the screw 3 swings radially, thereby reducing the radial swing of the screw 3 and the associated flywheel 2, thereby reducing eccentric wear.

[0031] The above specific implementation methods cannot be used as a limitation on the protection scope of the present utility model. For those skilled in the art, any replacement, improvement or transformation made to the implementation methods of the present utility model falls within the protection scope of the present utility model.

[0032] Anything not described in detail in the present invention is well known to those skilled in the art.

Claims

1. A flywheel radial positioning mechanism for a direct-drive electric screw press, connected between an upper crossbeam and a screw, wherein the upper end of the screw passes through the upper crossbeam and is connected to a flywheel, characterized in that: include: a rotating bearing connected between the screw and the upper beam; a fixing seat connected to the lower end surface of the upper crossbeam; a lower sleeve, the lower sleeve being located below the rotating bearing and connected between the fixing seat and the screw; An upper positioning assembly is located above the rotary bearing and is connected between the upper crossbeam and the hub of the flywheel.

2. A flywheel radial positioning mechanism for a direct-drive electric screw press according to claim 1, characterized in that: The upper positioning assembly includes: a fixing sleeve, the fixing sleeve being arranged on the upper crossbeam; An upper shaft sleeve is fixed to the inner wall of the fixed sleeve and is arranged on the periphery of the hub of the flywheel.

3. A flywheel radial positioning mechanism for a direct-drive electric screw press according to claim 2, characterized in that: The gap between the upper sleeve and the hub of the flywheel is between 0.2-0.3 mm.

4. A flywheel radial positioning mechanism for a direct-drive electric screw press according to claim 2 or 3, characterized in that: The upper shaft sleeve and the fixing sleeve are fixed by means of set screws.

5. The flywheel radial positioning mechanism for a direct-drive electric screw press according to claim 2, characterized in that: The inner wall of the upper sleeve is provided with a plurality of oil grooves along its circumference.

6. A flywheel radial positioning mechanism for a direct-drive electric screw press according to claim 1, characterized in that: The fixing seat extends in a direction away from the upper crossbeam, and a slider guide hole is provided at a position of the fixing seat corresponding to the center axis thereof, for the slider to partially extend into the interior thereof.

7. A flywheel radial positioning mechanism for a direct-drive electric screw press according to claim 6, characterized in that: The fixing seat is further provided with two auxiliary guide holes, which are symmetrically arranged on both sides of the guide hole of the slider.

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