Die pressing mechanism and method for excavator motor mainboard

Abstract

The invention provides a mold pressing mechanism and method for an excavator motor mainboard. The mold pressing mechanism comprises a frame body, a mold pressing mechanism and a mold pressing mechanism, the left movable die and the right movable die are symmetrically arranged on the frame body and can synchronously rotate in opposite rotating directions relative to the frame body in a vertical plane; the pressing die can move up and down relative to the frame body in the vertical direction and is used for pressing a mainboard machining piece downwards, and the pressing die is of a water-drop-shaped structure matched with the bending shape of the motor mainboard; when the pressing die downwards presses the main board machining part and moves to a target position, the left movable die and the right movable die synchronously rotate to a preset position from an initial position under the pressure of the main board machining part and the pressing die; and a channel matched with the bending shape and size of the motor mainboard is formed between the left movable die and the right movable die which are located at the preset positions and the pressing die located at the target position, so that the mainboard machining part is bent and formed into the motor mainboard. According to the die pressing mechanism provided by the invention, the motor mainboard can be processed and formed at one time.

Description

Technical Field

[0001] The invention relates to the field of excavators, and in particular to a die pressing mechanism and method for an excavator motor mainboard. Background Art

[0002] An excavator, also known as excavating machinery, is an earth-moving machine that uses a bucket to dig materials above or below the surface of the machine and load them into transport vehicles or unload them to a stockpile.

[0003] like Figure 1 The figure shows an excavator motor mainboard 10. The motor mainboard is a special-shaped sheet metal structure, which is composed of an arc plate 11 and a tangent plate 12.

[0004] In the process of implementing the present invention, the inventors found that there are at least the following problems in the prior art:

[0005] Currently, there are two processing methods for the motor mainboard. One is to divide the motor mainboard into a flat plate and an arc plate, form them separately and then weld them together. This process is accurate, but inefficient and has quality risks caused by welding defects. The other is to form the motor mainboard through two die pressings. This process is much more efficient than welding, but the positioning during the second die pressing is inconsistent with the positioning during the first die pressing, resulting in inaccurate product molding, and the deformation of the secondary molding is difficult to control, resulting in the opening of the motor mainboard being much larger than the actual requirement.

[0006] Therefore, a die-casting mechanism and method for an excavator motor mainboard are needed to at least partially solve the above technical problems. Summary of the invention

[0007] The embodiment of the present invention provides a die pressing mechanism and method for an excavator motor mainboard, which can realize one-time processing and molding of the motor mainboard with good molding quality.

[0008] In a first aspect, the present invention provides a die pressing mechanism for an excavator motor mainboard, wherein the motor mainboard comprises an arc plate located below and two tangent flat plates tangentially connected to the two ends of the arc plate, and the die pressing mechanism comprises:

[0009] Frame;

[0010] A left movable mold and a right movable mold arranged in a symmetrical manner provided to the frame, wherein the left movable mold and the right movable mold can be synchronously rotated in opposite rotation directions relative to the frame in a vertical plane;

[0011] Wherein, the left movable mold and the right movable mold both include a mold body and a concave wall surface arranged on a side opposite to the mold body, and the wall surface includes an arc surface portion adapted to the arc plate shape of the motor main board and a plane portion adapted to the tangent flat plate shape of the motor main board;

[0012] A pressing die for pressing down the mainboard processing piece, which can move up and down relative to the frame in the vertical direction, and the pressing die is constructed in a teardrop-shaped structure adapted to the bending shape of the motor mainboard; wherein the mainboard processing piece is a flat plate after the motor mainboard is horizontally unfolded;

[0013] When the pressing die presses down the mainboard processing piece and moves to the target position, the left movable die and the right movable die respectively rotate synchronously from the initial position to the predetermined position under the pressure of the mainboard processing piece and the pressing die, and a channel matching the bending shape and size of the motor mainboard is formed between the left movable die and the right movable die at the predetermined position and the pressing die at the target position, so that the mainboard processing piece is bent and formed into the motor mainboard;

[0014] Wherein, the left movable mold and the right movable mold in the initial position are surrounded by a receiving space for receiving the pressing mold.

[0015] According to the die pressing mechanism of the present invention, it includes structures such as a left movable die, a right movable die and a die pressing, and the die pressing presses down the mainboard workpiece, and at the same time the left movable die and the right movable die rotate, and the die cooperates to finally form a channel that is compatible with the bending shape and size of the motor mainboard. At this time, the left movable die, the right movable die and the die pressing are together close to the mainboard workpiece, and the mainboard workpiece is bent to form it into a motor mainboard, thereby realizing one-time processing and forming of the motor mainboard, and because the entire mainboard workpiece is bent and formed at one time, the forming quality is good.

[0016] Optionally, the die pressing mechanism is constructed as follows:

[0017] When the die moves upward from the target position, the motor main board covered on the die rises together, and when the die moves upward to a position where it is out of contact with the left movable die and the right movable die, the left movable die and the right movable die rotate to the initial position.

[0018] Optionally, the die pressing mechanism further includes a reset mechanism, which is disposed on a frame on a corresponding side of the left movable mold and the right movable mold, and is used to drive the left movable mold and the right movable mold to rotate to the initial position respectively.

[0019] and / or

[0020] The die pressing mechanism further comprises a limiting mechanism, which is arranged on a frame on a corresponding side of the left movable mold and the right movable mold, and is used to abut against the left movable mold and the right movable mold when they are in the initial position to prevent further deflection.

[0021] Optionally, the reset mechanism comprises:

[0022] A mounting seat, the mounting seat is arranged on a frame body on a corresponding side of the left movable mold and the right movable mold;

[0023] A stretch spring, one end of which is connected to the left movable mold or the right movable mold on the corresponding side, and the other end of which is connected to the mounting seat on the corresponding side, for providing a driving force for driving the left movable mold and the right movable mold to rotate to the initial position.

[0024] Optionally, the left movable mold, the right movable mold and / or the top of the mounting seat also has a horizontal surface for supporting the mainboard processing piece upward. And / or

[0025] The die pressing mechanism also includes an adjusting mechanism for adjusting the tension of the stretch spring, including a telescopic member with one end connected to the stretch spring; the telescopic member is arranged on the mounting seat and is movable relative to the mounting seat in the left-right direction.

[0026] Optionally, a positioning block for positioning the mainboard processing part is further provided on the top of the mounting seat on a horizontal plane for supporting the mainboard processing part upward.

[0027] Optionally, the frame includes two support plates spaced apart in the front-to-back direction; wherein the left movable mold and the right movable mold are arranged between the two support plates.

[0028] Optionally, at least one of the two support plates is further provided with a concave notch at a position corresponding to the accommodating space.

[0029] In a second aspect, the present invention also provides a die-casting method for an excavator motor mainboard, comprising the die-casting mechanism of the above technical solution.

[0030] Wherein, the compression molding method comprises the following steps:

[0031] Place the mainboard workpiece to be processed on the horizontal plane of the left movable mold, the right movable mold and the top of the mounting seat, and determine the position by the positioning block;

[0032] The pressing die moves downward in the vertical direction to contact and press down the main board workpiece to be processed;

[0033] The pressing die continues to press the motherboard workpiece and stops when it moves to the target position. The left movable die and the right movable die respectively rotate synchronously from the initial position to the predetermined position under the pressure of the motherboard workpiece and the pressing die. At this time, the left movable die, the right movable die and the pressing die are all attached and cooperated to clamp the motherboard workpiece, and the motherboard workpiece is formed into a motor motherboard.

[0034] The die moves upward in the vertical direction from the target position, and the motor main board wrapped on the die rises together;

[0035] The pressing die is reset, and when it is out of contact with the left movable die and the right movable die, the left movable die and the right movable die rotate to the initial position.

[0036] According to the molding method of the present invention, since the molding mechanism of the present invention is adopted, the molding of the motor mainboard becomes simple and fast, and the molding quality is good.

[0037] By utilizing the technical solution according to the embodiment of the present invention, the beneficial effects that can be obtained are at least:

[0038] 1. The die pressing mechanism of the present invention presses the mainboard processing piece through the die pressing, and the left movable die and the right movable die rotate at the same time. The left movable die, the right movable die and the die pressing mechanism finally form a channel that matches the bending shape and size of the motor mainboard, and bends the mainboard processing piece to form it into the motor mainboard, thereby realizing one-time processing and forming of the motor mainboard;

[0039] 2. The die pressing mechanism of the present invention is also provided with a reset mechanism for driving the left movable die and the right movable die to rotate to the initial position, so that the left movable die and the right movable die are automatically reset after the motor mainboard is formed by the die pressing;

[0040] 3. The support plate in the die-pressing mechanism of the present invention is also provided with a concave notch at a position corresponding to the accommodating space, which can reduce the material used for the support plate on the one hand, and can observe the processing and molding process in real time and find problems in time on the other hand. Finally, the mainboard processed parts or the motor mainboard can be taken out in time through the notch in case of unexpected situations.

[0041] Additional advantages, purposes, and features of the present invention will be described in part in the following description, and will become apparent to those skilled in the art after studying the following, or may be learned from the practice of the present invention. The purposes and other advantages of the present invention may be achieved and obtained by the structures specifically indicated in the specification and the accompanying drawings.

[0042] Those skilled in the art will appreciate that the objectives and advantages that can be achieved with the present invention are not limited to the above specific description, and the above and other objectives that can be achieved by the present invention will be more clearly understood from the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] The drawings described herein are used to provide a further understanding of the present invention, constitute a part of this application, and do not constitute a limitation of the present invention. The components in the drawings are not drawn to scale, but are only for illustrating the principles of the present invention. In order to facilitate the illustration and description of some parts of the present invention, the corresponding parts in the drawings may be enlarged, that is, they may become larger relative to other components in the exemplary device actually manufactured according to the present invention. In the drawings:

[0044] Figure 1 It is a schematic diagram of the existing excavator motor mainboard at two different angles;

[0045] Figure 2 A schematic diagram of a mainboard processing part involved in a die pressing mechanism according to an embodiment of the present invention;

[0046] Figure 3 is a schematic diagram of a die pressing mechanism according to an embodiment of the present invention;

[0047] Figure 4 for Figure 3 A side view of the die pressing mechanism shown, wherein the left movable die and the right movable die are partially perspectively processed;

[0048] Figure 5 A schematic diagram of the relative positions between a die pressing mechanism and a mainboard processing piece in a die pressing method according to an embodiment of the present invention;

[0049] Figure 6 is another schematic diagram of the relative positions between the die pressing mechanism and the mainboard processing piece in the die pressing method according to an embodiment of the present invention; and

[0050] Figure 7 Another schematic diagram of the relative positions between the molding mechanism and the mainboard processing piece in the molding method according to an embodiment of the present invention, at which time the mainboard processing piece has been bent and formed into a motor mainboard.

[0051] Description of reference numerals:

[0052] 10. Motor main board; 11. Arc plate; 12. Tangent plate;

[0053] 20. Mainboard processing parts;

[0054] 100, die pressing mechanism; 110, frame; 111, support plate; 112, notch; 113, pivot; 121, left movable die; 122, right movable die; 123, die body; 124, wall surface; 125, arc surface; 126, plane surface; 130, die pressing; 141, mounting seat; 142, tension spring; 150, limit rod; 160, horizontal plane; 171, telescopic screw; 181, positioning block;

[0055] W1, target position; W2, predetermined position; W3, initial position. DETAILED DESCRIPTION

[0056] By referring to the exemplary embodiments, the objects and functions of the present invention and the methods for achieving these objects and functions will be explained. However, the present invention is not limited to the exemplary embodiments disclosed below; it can be implemented in different forms. The essence of the description is only to help those skilled in the relevant art to comprehensively understand the specific details of the present invention.

[0057] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should also be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, wholes, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or combinations thereof.

[0058] Ordinal numbers such as "first" and "second" cited in the present invention are merely identifications and do not have any other meanings, such as a specific order, etc. Moreover, for example, the term "first component" itself does not imply the existence of the "second component", and the term "second component" itself does not imply the existence of the "first component".

[0059] It should be noted that the terms "upper", "lower", "front", "back", "left", "right", "inside", "outside" and similar expressions used in this document are for illustrative purposes only and are not limiting.

[0060] The present invention provides a die pressing mechanism for an excavator motor mainboard, wherein the die pressing mechanism 100 can be applied to the excavator field, such as for molding an excavator motor mainboard 10, and can solve the problem of low efficiency or poor molding quality of the existing molding technology of the motor mainboard 10.

[0061] First, if Figure 2 As shown in the figure, which will be described below, the processing object of the die pressing mechanism 100 of the present invention is the mainboard processing part 20. The mainboard processing part 20 can be formed into the motor mainboard 10 at one time by the die pressing mechanism 100. The mainboard processing part 20 is a flat plate after the motor mainboard 10 is horizontally unfolded. Among them, the motor mainboard 10 is a prior art device, which belongs to a special-shaped sheet metal structure, which is composed of a circular arc plate 11 and a tangent plate 12.

[0062] The present invention provides a die pressing mechanism 100 for an excavator motor mainboard. In a preferred embodiment, as Figure 3 and Figure 4 As shown, Figure 3 is a schematic diagram of a die pressing mechanism 100 according to an embodiment of the present invention; Figure 4 for Figure 3 The side view of the die pressing mechanism 100 is shown, wherein the left movable die 121 and the right movable die 122 are partially perspective processed. The die pressing mechanism 100 may include a frame 110, a left movable die 121, a right movable die 122 and a die 130.

[0063] The frame 110 serves as a supporting mechanism of the die pressing mechanism 100 and is used to install the left movable die 121 and the right movable die 122. The left movable die 121 and the right movable die 122 can rotate synchronously in opposite directions relative to the frame 110. The die 130 serves as an actuator for applying pressure, and is used to apply force downward to the motherboard processing piece 20, and cooperate with the left movable die 121 and the right movable die 122 to bend the motherboard processing piece 20, and form the motor motherboard 10 at one time.

[0064] Specifically, the frame 110 for mounting the left movable mold 121 and the right movable mold 122 may be in any specific form. Figure 3 As shown, the frame 110 may include two support plates 111 spaced apart in the front-to-back direction, such as two vertical support plates 111 arranged side by side.

[0065] like Figure 4 As shown, the left movable mold 121 and the right movable mold 122 arranged in a symmetrical manner are arranged on the frame 110. There is no strict restriction on the installation position of the left movable mold 121 and the right movable mold 122 on the frame 110, for example, it can be one side outside the frame 110, or it can be inside the frame 110, such as between the two support plates 111. The left movable mold 121 and the right movable mold 122 can rotate synchronously in opposite rotation directions relative to the frame 110 in the vertical plane. For example, when the left movable mold 121 rotates in the clockwise direction relative to the frame 110 in the vertical plane, the right movable mold 122 rotates synchronously in the counterclockwise direction relative to the frame 110 in the vertical plane. Alternatively, when the left movable mold 121 rotates in the counterclockwise direction relative to the frame 110 in the vertical plane, the right movable mold 122 rotates synchronously in the clockwise direction relative to the frame 110 in the vertical plane.

[0066] The left movable mold 121 and the right movable mold 122 can be rotatably connected to the frame body 110 via a pivot 113 extending in the front-rear direction, so as to achieve rotation relative to the frame body 110 .

[0067] The left movable mold 121 and the right movable mold 122 each include a mold body 123 and a concave wall surface 124 provided on a side (inner side) opposite to the mold body 123. The wall surface 124 may include an arc portion 125 adapted to the arc plate shape of the motor main board and a plane portion 126 adapted to the tangent flat plate shape of the motor main board. The plane portion 126 and the arc portion 125 are smoothly transitioned and connected.

[0068] In addition, the mold bodies 123 of the left movable mold 121 and the right movable mold 122 can be a separate block structure or an integral structure in which multiple blocks are connected together.

[0069] The pressing die 130 for pressing down the mainboard processing piece 20 can move up and down relative to the frame 110 in the vertical direction. The pressing die 130 is in the shape of the bending (i.e. Figure 1 A teardrop-shaped block structure that is compatible with the shape shown in (a).

[0070] Similarly, the die 130 may be a single block structure or an integral structure in which multiple blocks are connected together.

[0071] refer to Figure 6 When the die pressing mechanism 100 is working, when the die pressing 130 presses down the mainboard processing piece 20 and moves to the target position W1, the left movable die 121 and the right movable die 122 respectively rotate synchronously from the initial position W3 to the predetermined position W2 under the pressure of the mainboard processing piece and the die pressing 130. A channel matching the bending shape and size of the motor mainboard is formed between the left movable die 121 and the right movable die 122 at the predetermined position W2 and the die pressing 130 at the target position W1, so that the mainboard processing piece 20 is bent and formed into the motor mainboard 10.

[0072] The left movable mold 121 and the right movable mold 122 at the initial position W3 are surrounded by a receiving space for receiving the pressing mold 130 , so that the pressing mold 130 can enter the receiving space after starting to press down the mainboard processing piece.

[0073] According to the die pressing mechanism 100 of the present invention, it includes structures such as a left movable die 121, a right movable die 122 and a die pressing 130. The die pressing 130 presses down the mainboard workpiece, and at the same time, the left movable die 121 and the right movable die 122 rotate, and cooperate with the die pressing 130 to finally form a channel that is compatible with the bending shape and size of the motor mainboard. At this time, the left movable die 121, the right movable die 122 and the die pressing 130 are together close to the mainboard workpiece, and the mainboard workpiece is bent to form it into a motor mainboard, thereby realizing one-time processing and forming of the motor mainboard. Moreover, since the entire mainboard workpiece is bent and formed at one time, the forming quality is good.

[0074] Furthermore, when the die 130 moves upward from the target position W1, the motor main board covered on the die 130 rises together. And when the die 130 moves upward to a position where it is out of contact with the left movable die 121 and the right movable die 122, the left movable die 121 and the right movable die 122 can be reset and automatically rotated to their respective initial positions W3.

[0075] Continue to refer Figure 3 In order to realize that the left movable mold 121 and the right movable mold 122 can automatically rotate to their respective initial positions W3, the die pressing mechanism 100 may further include a reset mechanism. The reset mechanism is provided to the frame 110 on the corresponding side of the left movable mold 121 and the right movable mold 122, and is used to drive the left movable mold 121 and the right movable mold 122 to rotate to the initial position W3 respectively.

[0076] In a preferred embodiment, the reset mechanism may include a mounting seat 141 and a tension spring 142 .

[0077] Specifically, the mounting seat 141 is disposed on the frame 110 at a side corresponding to the left movable mold 121 and the right movable mold 122. For example, a mounting seat 141 is disposed on each side of the frame 110 corresponding to the left movable mold 121 and the right movable mold 122. The specific form of the mounting seat 141 is not limited.

[0078] One end of the tension spring 142 is connected to the left movable mold 121 or the right movable mold 122 on the corresponding side. The other end of the tension spring 142 is connected to the mounting seat 141 on the corresponding side, and is used to provide a driving force to drive the left movable mold 121 and the right movable mold 122 to rotate to the initial position W3.

[0079] In order to adjust the tension of the tension spring 142, that is, to adjust the tension of the tension spring 142, the die pressing mechanism 100 may further include an adjusting mechanism for adjusting the tension of the tension spring 142. The adjusting mechanism may include a telescopic member having one end connected to the tension spring 142. The telescopic member is disposed on the mounting seat 141 and is movable relative to the mounting seat 141 in the left-right direction. The telescopic member may be a telescopic screw 171 or other telescopic member, which is not limited here.

[0080] refer to Figure 4, when the left movable mold 121 and the right movable mold 122 rotate to the initial position W3, they may continue to deflect. In order to prevent the left movable mold 121 and the right movable mold 122 from continuing to deflect, the die pressing mechanism 100 according to the embodiment of the present invention may also include a limiting mechanism. The limiting mechanism is provided to the frame 110 on the corresponding side of the left movable mold 121 and the right movable mold 122, and is used to abut against the left movable mold 121 and the right movable mold 122 when they are in the initial position W3. For example, the limiting mechanism can adopt a limiting rod 150 extending in the front-to-back direction. When the left movable mold 121 and the right movable mold 122 rotate to the initial position W3, the limiting rod 150 abuts against the left movable mold 121 and the right movable mold 122 on the relatively outward side to stop them immediately.

[0081] In order to properly place the motherboard processing part 20 before the pressing die 130 presses down, the top of the left movable die 121, the right movable die 122 and the mounting seat 141 may also have a horizontal surface 160 for supporting the motherboard processing part upward. That is, the top of the left movable die 121, the right movable die 122 and the mounting seat 141 have the same height of the horizontal surface 160, which jointly supports the motherboard processing part upward. It can be understood that the height of the horizontal surface 160 at the top of the left movable die 121 and the right movable die 122 and the horizontal surface 160 at the top of the mounting seat 141 may not be consistent.

[0082] Continued from above, reference Figure 3 When the motherboard processing part is horizontally placed on the horizontal surface 160 of the left movable mold 121, the right movable mold 122 and the top of the mounting seat 141, in order to put the motherboard processing part in place as soon as possible, the top horizontal surface 160 of the mounting seat 141 can also be provided with a positioning block 181 for positioning the placement position of the motherboard processing part. The positioning block 181 positions the motherboard processing part in both the front-to-back direction and the left-to-right direction.

[0083] When the mainboard workpiece horizontally placed on the horizontal surface 160 at the top of the left movable mold 121, the right movable mold 122 and the mounting seat 141 begins to be bent downward by the pressure applied by the pressing mold 130, the connection between the horizontal surface 160 at the top of the left movable mold 121 and the right movable mold 122 and their respective planar portions 126 can be constructed as an arc surface with a smooth transition to prevent the mainboard workpiece from being scratched or creased by sharp edges when bending downward.

[0084] According to the die pressing mechanism 100 of the embodiment of the present invention, one or both support plates 111 in the frame 110 may be provided with a concave notch 112 at a position corresponding to the accommodation space. The notch 112 allows the status of the left movable mold 121 and the right movable mold 122 between the two support plates 111 to be seen in real time.

[0085] In summary, according to the die pressing mechanism 100 of the present invention, the die pressing mechanism 130 presses down the mainboard processing piece, and at the same time the left movable die 121 and the right movable die 122 rotate, and the left movable die 121, the right movable die 122 and the die pressing mechanism 130 finally form a channel that is compatible with the bending shape and size of the motor mainboard, and bend the mainboard processing piece to form it into the motor mainboard, so as to realize the one-time processing and forming of the motor mainboard; at the same time, the die pressing mechanism 100 is also provided with a reset mechanism for driving the left movable die 121 and the right movable die 122 to rotate to the initial position W3, so that the left movable die 121 and the right movable die 122 can be rotated ... The mold 122 automatically resets after cooperating with the pressing mold 130 to complete the molding of the motor mainboard, and a limiting mechanism is also provided to limit the left movable mold 121 and the right movable mold 122 from rotating to the initial position W3 and continuing to deflect; in addition, the support plate 111 in the pressing mold mechanism 100 of the present invention is also provided with a concave notch 112 at a position corresponding to the accommodating space, which can reduce the material and weight of the support plate 111 on the one hand, and on the other hand, can observe the processing and molding process in real time and discover problems in time, and finally, through the notch 112, the mainboard processing parts or the motor mainboard can be removed in time when an unexpected situation occurs.

[0086] In a second aspect, the present invention further provides a molding method based on the molding mechanism 100 of the above embodiment.

[0087] The following will be based on Figure 5 , Figure 6 and Figure 7 , briefly describing the process of the molding method of an embodiment of the present invention.

[0088] refer to Figure 5 , place the mainboard workpiece to be processed on the horizontal surface 160 of the left movable mold 121 , the right movable mold 122 and the top of the mounting seat 141 , and determine the position by the positioning block 181 .

[0089] The pressing die 130 moves downward in the vertical direction to contact and press down the main board workpiece to be processed. Figure 6 , the die 130 continues to press the motherboard workpiece and stops when it moves to the target position W1. The left movable die 121 and the right movable die 122 each rotate synchronously from the initial position W3 to the predetermined position W2 under the pressure of the motherboard workpiece and the die 130. At this time, the left movable die 121, the right movable die 122 and the die 130 are all attached and cooperated to clamp the motherboard workpiece, and the motherboard workpiece is bent and formed into a motor motherboard.

[0090] refer to Figure 7 The die 130 moves upward in the vertical direction from the target position W1, and the motor mainboard covered on the die 130 rises together. The die 130 is reset, and when it is out of contact with the left movable die 121 and the right movable die 122, the left movable die 121 and the right movable die 122 rotate to the initial position W3.

[0091] Other embodiments of the present invention will be readily apparent to those skilled in the art from the description and practice of the invention disclosed herein. The description and embodiments are to be considered exemplary only, and the true scope and spirit of the present invention are to be limited by the claims.

Claims

1. A die pressing mechanism for an excavator motor mainboard, the motor mainboard comprising a circular arc plate located below and two tangent flat plates tangentially connected to the two ends of the circular arc plate, characterized in that: The die pressing mechanism comprises: Frame; A left movable mold and a right movable mold arranged in a symmetrical manner provided to the frame, wherein the left movable mold and the right movable mold can be synchronously rotated in opposite rotation directions relative to the frame in a vertical plane; Wherein, the left movable mold and the right movable mold both include a mold body and a concave wall surface arranged on a side opposite to the mold body, and the wall surface includes an arc surface portion adapted to the arc plate shape of the motor main board and a plane portion adapted to the tangent flat plate shape of the motor main board; A pressing die for pressing down the mainboard processing piece, which can move up and down relative to the frame in the vertical direction, and the pressing die is constructed in a teardrop-shaped structure adapted to the bending shape of the motor mainboard; wherein the mainboard processing piece is a flat plate after the motor mainboard is horizontally unfolded; When the pressing die presses down the mainboard processing piece and moves to the target position, the left movable die and the right movable die respectively rotate synchronously from the initial position to the predetermined position under the pressure of the mainboard processing piece and the pressing die, and a channel matching the bending shape and size of the motor mainboard is formed between the left movable die and the right movable die at the predetermined position and the pressing die at the target position, so that the mainboard processing piece is bent and formed into the motor mainboard; Wherein, the left movable mold and the right movable mold in the initial position are surrounded by a receiving space for receiving the pressing mold.

2. The die pressing mechanism according to claim 1, characterized in that: The die pressing mechanism is constructed as follows: When the die moves upward from the target position, the motor main board covered on the die rises together, and when the die moves upward to a position where it is out of contact with the left movable die and the right movable die, the left movable die and the right movable die rotate to the initial position.

3. The die pressing mechanism according to claim 1, characterized in that: It also includes a reset mechanism, which is arranged on a frame on one side of the left movable mold and the right movable mold, and is used to drive the left movable mold and the right movable mold to rotate to the initial position respectively.

4. The die pressing mechanism according to claim 3, characterized in that: The reset mechanism comprises: A mounting seat, the mounting seat is arranged on a frame body on a corresponding side of the left movable mold and the right movable mold; A stretch spring, one end of which is connected to the left movable mold or the right movable mold on the corresponding side, and the other end of which is connected to the mounting seat on the corresponding side, for providing a driving force for driving the left movable mold and the right movable mold to rotate to the initial position.

5. The die pressing mechanism according to claim 4, characterized in that: The left movable mold, the right movable mold and / or the top of the mounting seat also have a horizontal surface for supporting the mainboard processing piece upwards; and / or It also includes an adjusting mechanism for adjusting the tension of the extension spring, including a telescopic member with one end connected to the extension spring; the telescopic member is arranged on the mounting seat and is movable relative to the mounting seat in the left-right direction.

6. The die pressing mechanism according to claim 5, characterized in that: A positioning block for positioning the mainboard processing part is also provided on the top of the mounting seat at a horizontal plane for supporting the mainboard processing part upward.

7. The die pressing mechanism according to claim 1, characterized in that: The frame includes two support plates spaced apart in the front-rear direction; wherein the left movable mold and the right movable mold are arranged between the two support plates.

8. The die pressing mechanism according to claim 7, characterized in that: At least one of the two support plates is further provided with a concave notch at a position corresponding to the accommodating space.

9. The die pressing mechanism according to claim 1, characterized in that: It also includes a limiting mechanism, which is set to the frame on the corresponding side of the left movable mold and the right movable mold, and is used to abut against the left movable mold and the right movable mold when they are in the initial position to prevent further deflection.

10. A die-casting method for an excavator motor mainboard, based on the die-casting mechanism according to any one of claims 1 to 9, characterized in that: The following steps are involved: Place the mainboard workpiece to be processed on the horizontal plane of the left movable mold, the right movable mold and the top of the mounting seat, and determine the position by the positioning block; The pressing die moves downward in the vertical direction to contact and press down the main board workpiece to be processed; The pressing die continues to press the motherboard workpiece and stops when it moves to the target position. The left movable die and the right movable die respectively rotate synchronously from the initial position to the predetermined position under the pressure of the motherboard workpiece and the pressing die. At this time, the left movable die, the right movable die and the pressing die are all attached and cooperated to clamp the motherboard workpiece, and the motherboard workpiece is formed into a motor motherboard. The die moves upward in the vertical direction from the target position, and the motor main board wrapped on the die rises together; The pressing die is reset, and when it is out of contact with the left movable die and the right movable die, the left movable die and the right movable die rotate to the initial position.

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