Crankshaft supporting structure of press machine

Abstract

The utility model discloses a press crankshaft supporting structure which comprises a machine frame, a servo motor arranged on the machine frame and a crankshaft arranged in the machine frame. The servo motor drives the crankshaft to rotate; a group of supporting plates are arranged on the rack at intervals, and through holes convenient for the crankshaft to penetrate through are formed in the supporting plates; the input end of the crankshaft is fixedly connected with the output section of the servo motor, and the output end of the crankshaft penetrates through the through hole; outer supporting seats are arranged at the two through holes in the supporting plates on the two sides, a set of inner supporting seats are arranged at the through holes in the supporting plate on the middle section, and the inner supporting seats are arranged on the periphery of the crankshaft in a sleeving mode. The inner diameter of the inner supporting seat is equal to the outer diameter of the main shaft section of the crankshaft, and the outer diameter of the main body section of the inner supporting seat is equal to the diameter of the through hole. The crankshaft has the advantages that the coaxiality of the crankshaft can be improved through the supporting piece, the two-half structure is convenient to assemble, and the usual thinking of technicians in the field is changed; the inner diameter of the supporting block is adjustable so as to adapt to crankshafts with different diameters, and the use flexibility of the supporting block is improved.

Description

Technical Field

[0001] This utility model belongs to the field of press technology, and in particular relates to a crankshaft support structure for a press. Background Technology

[0002] The market demand for large-table precision presses is increasing, leading to higher requirements for their stability and precision. This places high demands on the press's transmission system. Due to the large lateral span of large, high-speed precision presses, most employ double-crankshaft structures as disclosed in patents CN203743226U ("Rigid Connection Structure of Double Crankshaft in Closed-Type Press") and CN204749315U ("A Connection Structure of Double Crankshaft in Press"). This method achieves coaxiality between adjacent crankshafts by installing two couplings at the connection point and screwing them together. However, after connecting the two crankshafts using this method, it was found during use that due to the special nature of the crankshaft structure, especially during rotation under eccentric forces, it deforms to varying degrees due to disturbances. The root cause is insufficient crankshaft support. In the existing structure, in order to ensure the coaxiality and stability of the crankshaft, there is no space to install support components. The only way is to install a shrink sleeve structure. However, the shrink sleeve structure does not provide support, and it is relatively complicated to calibrate the coaxiality through this structure, and the required accuracy is difficult to achieve.

[0003] To address the aforementioned problems, designing a crankshaft support structure for a press is a crucial technical issue that those skilled in the art need to resolve. Utility Model Content

[0004] The purpose of this invention is to solve the above-mentioned problems in the prior art and to provide a crankshaft support structure for a press.

[0005] The objective of this utility model is achieved through the following technical solution:

[0006] A crankshaft support structure for a press includes a frame, a servo motor mounted on the frame, and a crankshaft disposed within the frame. The servo motor drives the crankshaft to rotate. A set of support plates are spaced apart on the frame, and through holes are formed on the support plates to facilitate the crankshaft's passage. The input end of the crankshaft is fixedly connected to the output section of the servo motor, and the output end of the crankshaft passes through the through holes. Outer support seats are provided at the two through holes on the two side support plates, and an inner support seat is provided at the through holes on the support plate in the middle section, with the inner support seats fitted around the outer circumference of the crankshaft. The inner diameter of the inner support seat is equivalent to the outer diameter of the crankshaft's main shaft section, and the outer diameter of the main body section of the inner support seat is equivalent to the diameter of the through holes.

[0007] Preferably, the inner support base consists of two hollow support blocks with a T-shaped cross-section; it includes an integrally formed main body section and a fixing section, wherein the diameter of the fixing section is larger than the diameter of the main body section; the main body sections of the two support blocks are connected by bolts, and the installation direction of the bolts is perpendicular to the axial direction of the inner support base; the fixing section is connected to the support plate by bolts.

[0008] Preferably, the minimum inner diameter formed by the two support blocks is not less than the outer diameter of the main shaft segment.

[0009] Preferably, the inner diameter of the outer support base is equal to the inner diameter of the support member.

[0010] Preferably, the diameter of the through hole is not less than the maximum outer diameter of the crankshaft.

[0011] Preferably, the support plate is disposed at both ends of the upper cam section of the crankshaft and is approximately equal in length to the cam section.

[0012] Preferably, the crankshaft is a single piece and spans a set of support plates.

[0013] Preferably, the crankshaft is a split type, and a connecting sleeve is provided at the connection point of two adjacent crankshafts.

[0014] The advantages of this utility model's technical solution are mainly reflected in:

[0015] By limiting the position of the crankshaft with a support plate, the crankshaft is effectively prevented from moving along its axis during rotation, ensuring rotational concentricity. In addition, the inner and outer support seats improve the load-bearing capacity of the frame and reduce the impact of deflection. The inner and outer support seats have simple structures that are easy to process and install, and since their inner diameters are similar, the coaxiality of the crankshaft is guaranteed.

[0016] The coaxiality of the crankshaft can be improved by the support components, and the two-part structure facilitates assembly, changing the conventional thinking of those skilled in the art; the inner diameter of the support block is adjustable to accommodate crankshafts of different diameters, improving its flexibility of use.

[0017] The cam section of the crankshaft can be machined simultaneously, improving its structural accuracy and machining efficiency. This eliminates the need for post-machining adjustments, reduces machining steps, and ensures a high yield rate for the manufactured crankshafts. Attached Figure Description

[0018] Figure 1 : A cross-sectional view of the preferred embodiment of this utility model;

[0019] Figure 2 Cross-sectional view of the preferred second embodiment of this utility model;

[0020] Figure 3: Front view of the support member of the preferred embodiment of this utility model;

[0021] Figure 4 : Top view of the support member of the preferred embodiment of this utility model. Detailed Implementation

[0022] The purpose, advantages, and features of this utility model will be illustrated and explained through the following non-limiting description of preferred embodiments. These embodiments are merely typical examples of applying the technical solutions of this utility model, and all technical solutions formed by equivalent substitutions or equivalent transformations fall within the scope of protection claimed by this utility model.

[0023] In the description of the solution, it should be noted that the terms "center," "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience and simplification of description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Also, in the description of the solution, with the operator as a reference, the direction closer to the operator is the proximal end, and the direction farther from the operator is the distal end.

[0024] like Figures 1 to 2 As shown, this utility model discloses a crankshaft support structure for a press, including a frame 1, a servo motor 11 mounted on the frame 1, and a crankshaft 2 mounted within the frame 1. Since the servo motor 11 is known prior art, its specific structure will not be described here. The servo motor 11 drives the crankshaft 2 to rotate. Specifically, a set of support plates 12 are spaced apart on the frame 1, and through holes 10 are formed on the support plates 12 to facilitate the passage of the crankshaft 2. Outer support seats 13 are provided at the two through holes 10 on the two side support plates 12, and an inner support seat 3 is provided at the through holes 10 on the middle support plate 12. The inner support seats 3 are sleeved on the outer periphery of the crankshaft 2; that is, the input end of the crankshaft 2 is fixedly connected to the output end of the servo motor 11, and the output end of the crankshaft 2 passes through the through holes 10.

[0025] Furthermore, the support plate 12 is disposed at both ends of the convex shaft section 22 on the crankshaft 2, and is approximately equal in length to the convex shaft section 22. The inner diameter of the outer support seat 13 is equal to the inner diameter of the support member 3. The diameter of the through hole 10 is not less than the maximum outer diameter of the crankshaft 2. By limiting the position of the crankshaft with the support plate, the crankshaft is effectively prevented from moving along its axial direction during rotation, ensuring rotational concentricity; in conjunction with the inner and outer support seats, the load-bearing capacity of the frame is improved, and the influence of deflection is reduced; the inner and outer support seats have simple structures, are easy to process and install, and because their inner diameters are approximately equal, the coaxiality of the crankshaft is guaranteed.

[0026] Combination Figure 1 and Figure 3 As shown, the inner diameter of the inner support seat 3 is approximately equal to the outer diameter of the main shaft section 21 of the crankshaft 2, and the outer diameter of the main body section 31 of the inner support seat 3 is approximately equal to the diameter of the through hole 10. Furthermore, the inner support seat 3 is composed of two hollow support blocks with a T-shaped cross-section. Figure 3 As shown, both inner support seats 3 include an integrally formed main body segment 31 and a fixing segment 32, wherein the diameter of the fixing segment 32 is larger than the diameter of the main body segment 31. Furthermore, as... Figures 3 to 4 As shown, the main body sections 31 of the two support blocks are connected by bolts, and the installation direction of the bolts is perpendicular to the axial direction of the inner support seat 3; the fixed section 32 is connected to the support plate 12 by bolts.

[0027] The inner support 3 is divided into two parts, and the minimum inner diameter formed by the two support blocks is not less than the outer diameter of the main shaft section 21; that is, the inner diameter of the two support blocks can accommodate crankshafts of different diameters, improving their flexibility of use. In addition, the coaxiality of the crankshaft can be improved by the support, and the two-part structure facilitates assembly, changing the conventional thinking of those skilled in the art.

[0028] like Figure 1 The first embodiment of this utility model is shown. In this embodiment, the crankshaft 2 is preferably designed as a single piece, spanning a set of support plates 12. Designing the crankshaft as a single piece effectively ensures the concentricity of rotation, and its main shaft section is supported by an inner support seat, reducing the impact of deflection. In this embodiment, the outer support seat 13 near the servo motor 11 is first sleeved onto the input end of the crankshaft 2, and this input end is connected to the output section of the servo motor 11. Then, the output end of the crankshaft 2 passes through the through hole 10 in sequence; two outer support seats 13 are sleeved onto the crankshaft 2 and fixedly connected to the support plate 12 to ensure the straightness of the crankshaft 2. Finally, the two halves of the inner support seat 3 are snapped into the remaining through hole 10 to improve the overall support performance.

[0029] like Figure 2The illustration shows a second embodiment of the present invention. In this embodiment, the crankshaft 2 is preferably designed as a split type. The difference between this structure and the first embodiment is that a connecting sleeve 4 is provided at the connection point of two adjacent crankshafts 2. Furthermore, the connecting sleeve 4 is preferably connected to the crankshaft 2 near the servo motor 11 via a first spline, and to the other crankshaft 2 via a first spline or a tensioning shaft. When both crankshafts are connected to the connecting sleeve 4 via splines, the coaxiality of the two crankshafts can be guaranteed. When one crankshaft is connected via a tensioning shaft, the coaxiality of the two crankshafts can be maintained by adjusting the tensioning shaft. The specific adjustment method is known prior art and will not be described in detail here.

[0030] This utility model has many other embodiments. All technical solutions formed by equivalent transformation or equivalent transformation fall within the protection scope of this utility model.

Claims

1. A crankshaft support structure for a press, comprising a frame (1), a servo motor (11) mounted on the frame (1), and a crankshaft (2) mounted within the frame (1); wherein the servo motor (11) drives the crankshaft (2) to rotate; characterized in that: A set of support plates (12) are spaced apart on the frame (1), and through holes (10) are formed on the support plates (12) to facilitate the passage of the crankshaft (2); the input end of the crankshaft (2) is fixedly connected to the output section of the servo motor (11), and the output end of the crankshaft (2) passes through the through holes (10); an outer support seat (13) is provided at the two through holes (10) on the support plates (12) on both sides, and an inner support seat (3) is provided at the through hole (10) on the support plate (12) in the middle section, and the inner support seat (3) is sleeved on the outer circumference of the crankshaft (2); the inner diameter of the inner support seat (3) is equivalent to the outer diameter of the main shaft section (21) of the crankshaft (2), and the outer diameter of the main body section (31) of the inner support seat (3) is equivalent to the diameter of the through hole (10).

2. The press crankshaft support structure according to claim 1, characterized in that: The inner support base (3) consists of two hollow support blocks with a T-shaped cross section; it includes an integrally formed main body section (31) and a fixed section (32), wherein the diameter of the fixed section (32) is larger than the diameter of the main body section (31); the main body sections (31) of the two support blocks are connected by bolts, and the installation direction of the bolts is perpendicular to the axial direction of the inner support base (3); the fixed section (32) is connected to the support plate (12) by bolts.

3. The press crankshaft support structure according to claim 2, characterized in that: The minimum inner diameter formed by the two support blocks is not less than the outer diameter of the main shaft segment (21).

4. The press crankshaft support structure according to claim 3, characterized in that: The inner diameter of the outer support (13) is equal to the inner diameter of the inner support (3).

5. The press crankshaft support structure according to claim 1, characterized in that: The diameter of the through hole (10) is not less than the maximum outer diameter of the crankshaft (2).

6. The press crankshaft support structure according to claim 1, characterized in that: The support plate (12) is disposed at both ends of the cam section (22) in the crankshaft (2) and is equivalent to the length of the cam section (22).

7. The press crankshaft support structure according to claim 1, characterized in that: The crankshaft (2) is a single piece and spans a set of the support plates (12).

8. The press crankshaft support structure according to claim 1, characterized in that: The crankshaft (2) is a split type, and a connecting sleeve (4) is provided at the connection point of two adjacent crankshafts (2).

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