A flexible return rotation cam structure

Abstract

The present application provides a flexible return stroke rotary inclined wedge structure, which adds a push-pull cylinder in the existing rotary inclined wedge structure, pulls the upper swing block assembly of the rotary inclined wedge downward and pushes the upper swing block assembly upward to realize the flexible rotary return stroke of the upper swing block assembly of the rotary inclined wedge, eliminates the stop line and safety hazards caused by the broken rotary shaft mounting screw, pin and worn driving guide plate of the automatic line mold rotary inclined wedge, has high practicability, does not need to replace new molds, saves the cost of re-development, avoids the cost of developing new molds, production downtime loss and maintenance cost during the replacement of molds.

Description

Technical Field

[0001] This invention relates to the field of automotive stamping, and more specifically, to a flexible return rotary wedge structure. Background Technology

[0002] In existing designs, the rotation drive method for the rotating wedge of the mold in automated production lines is often rigid drive, such as... Figure 1 , Figure 2 As shown, Figure 1 In the initial state before rotation of the existing rotating wedge, the upper and lower 45° pads of the rotating wedge initially make line contact between the inclined surfaces of the two 45° pads. This contact method has a large horizontal component force. When the upper drive guide plate 4 moves downward, it drives the lower drive guide plate 5 to move to the left, and the lower 45° pad 9 moves to the left, rigidly pressing the upper 45° pad 3 of the upper swing block, causing the upper swing block body 10 to rotate downward around the rotation axis 2 until... Figure 2 The image shows the operating state. This type of drive is a rigid drive, and direct contact with other materials could pose a safety hazard.

[0003] The current structure drives the upper swing block assembly 1 to rotate through rigid compression between the upper and lower 45° pads. This rigid driving method has a high speed and large impact kinetic energy. The rigid compression will have a large horizontal component force in the high-speed collision. This component force will be transmitted to the pad mounting screws and pins, causing them to break. At the same time, this component force will also be transmitted to the rotating shaft 2, causing the rotating shaft 2 to be stressed and at risk of deformation. The mounting screws of the rotating shaft 2 are also prone to breakage. In addition, the rigid compression between the upper and lower 45° pads will also cause wear between the pads. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the purpose of this invention is to provide a flexible return rotary wedge structure, improving the safety and durability of rotary wedges used in automated production line molds. By adding a push-pull cylinder to the existing rotary wedge structure, the upper swing block assembly of the rotary wedge is pulled downwards and pushed upwards to achieve a flexible return rotation of the upper swing block assembly. This eliminates the line stoppage and safety hazards caused by broken mounting screws and pins on the rotary wedge shaft of the automated production line mold, as well as wear on the drive guide plate, resulting in a highly practical solution.

[0005] To achieve the above-mentioned technical effects, the present invention adopts the following technical solution:

[0006] A flexible return rotary wedge structure includes a fixed mold base, an upper swing block assembly, and a movable trolley assembly. The movable trolley assembly is disposed on the fixed mold base, and the fixed mold base is provided with a slide rail. The movable trolley assembly can slide on the slide rail.

[0007] The upper swing block assembly comprises an upper swing block body, an upper pad, a rotating shaft and a push-pull cylinder, the rotating shaft is fixed on the upper swing block body and rotates with the upper swing block body; the upper pad is fixedly connected to the upper swing block body by screws and is used to contact the movable trolley assembly; a push-pull cylinder is further arranged on the upper swing block body, the push-pull cylinder comprises a mounting seat and a movable part, the mounting seat is fixed on the mold base, and the movable part is connected to the upper swing block body, the push-pull cylinder only moves up and down in the movement direction of the cylinder and is used to pull the upper swing block assembly downward and push the upper swing block assembly upward.

[0008] The movable trolley assembly comprises a lower pad, a driving assembly and a movable trolley body; the movable trolley body is arranged on the mold base through a slide rail; the lower pad and the driving assembly are respectively arranged at two ends of the movable trolley body, the lower pad is fixedly mounted on the movable trolley body by screws and is used to contact the upper pad; the driving assembly is used to drive the movable trolley body to move horizontally towards the upper swing block assembly.

[0009] When the flexible return rotary wedge structure works, first, the push-pull cylinder pulls the upper swing block assembly downward around the rotating shaft, so that the upper swing block assembly rotates to a horizontal position; then, the upper driving block guide plate moves downward, the lower inclined surface of the upper driving block guide plate contacts and presses the upper inclined surface of the lower driving guide plate, so that the movable trolley body moves horizontally to the left, and the lower surface of the upper pad of the upper swing block assembly contacts the upper surface of the lower pad, so that the upper surface of the lower pad pushes the upper swing block assembly to a working state.

[0010] Preferably, the driving assembly comprises a lower driving guide plate and an upper driving guide plate, the lower driving guide plate is fixedly mounted on the movable trolley body by screws, the upper driving guide plate is mounted on the fixed mold base and can be driven upward and downward by a press slider, the lower end of the upper driving guide plate is provided with a lower inclined surface, and the upper end of the lower driving guide plate is provided with an upper inclined surface matched with the lower inclined surface of the upper driving guide plate.

[0011] When working, the upper driving guide plate is driven downward, the lower inclined surface of the upper driving guide plate is in contact with the upper inclined surface of the lower driving guide plate and generates a force perpendicular to the inclined surface, the force has a horizontal component, and the movable trolley assembly is driven to slide horizontally towards the upper swing block assembly.

[0012] Preferably, a return nitrogen gas spring is further arranged on the fixed mold base and is mounted by screws, and the return nitrogen gas spring assists the movable trolley assembly to move horizontally away from the upper swing block assembly.

[0013] Preferably, a press slider is further arranged on the fixed mold base above the driving assembly and is used to drive the upper driving guide plate to move upward and downward.

[0014] Compared with the prior art, the present application has the following beneficial effects:

[0015] 1. The flexible return rotary cam structure provided by the present application basically eliminates the mold failure error caused by the fracture of fastening screws due to the rigid extrusion between rotary cams in the production process, thereby improving the production efficiency.

[0016] 2. The flexible return rotary cam structure provided by the present application increases a push-pull cylinder on the basis of the existing rotary cam, without the need to replace a new mold, thereby saving the development cost, avoiding the cost of developing a new mold and the production downtime loss and maintenance cost during the replacement of the mold.

[0017] 3. The flexible return rotary cam structure provided by the present application is flexible in return through the action of the push-pull cylinder, is very convenient to use, can fundamentally eliminate the safety hazards of broken molds and pad wear, and can also improve the service life of the rotary cam. BRIEF DESCRIPTION OF DRAWINGS

[0018] Other features, objects and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments with reference to the following drawings:

[0019] Figure 1 It is an initial state diagram before the rotation of the rotary cam in the prior art;

[0020] Figure 2 It is a working state diagram after the rotation of the rotary cam in the prior art;

[0021] Figure 3 It is an initial state diagram before the rotation of the flexible rotary cam structure in the embodiment;

[0022] Figure 4 It is a diagram showing that the flexible rotary cam structure in the embodiment is pulled and rotated to a horizontal position by the push-pull cylinder;

[0023] Figure 5 It is a diagram showing that the movable trolley assembly of the flexible rotary cam structure in the embodiment moves the upper block assembly after the movement;

[0024] The diagram shows

[0025] 1 - upper block assembly

[0026] 2 - rotary shaft

[0027] 3 - upper 45° pad

[0028] 4 - lower driving guide plate

[0029] 5 - upper driving guide plate

[0030] 6 - return nitrogen spring

[0031] 7 - movable trolley body

[0032] 8-Push-Pull Cylinder

[0033] 9-45° lower pad

[0034] 10- Upper swing block body Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0036] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0037] It should be noted that similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, all directional indications (such as up, down, left, right, front, back, bottom, etc.) in this application are only used to explain the relative positional relationships and movements between components in a specific orientation (as shown in the figures). If the specific orientation changes, the directional indication will also change accordingly. Furthermore, descriptions involving "first," "second," etc., in this application are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated.

[0038] like Figures 3 to 5 As shown, this embodiment provides a flexible return rotary wedge structure, which mainly consists of a fixed mold base, an upper swing block assembly 1, and a movable trolley assembly;

[0039] The upper swing block assembly 1 comprises an upper swing block body 10, an upper 45° pad 3, a rotating shaft 2 and a push-pull cylinder 8. The rotating shaft 2 is fixed on the upper swing block body 10 by screws and rotates with the upper swing block body 10. The upper 45° pad 3 is fixed on the upper swing block body 10 by screws and comprises a horizontal upper surface, a horizontal lower surface and a 45° inclined surface between the upper and lower surfaces. The difference between the structure and the existing rotating inclined wedge is that a push-pull cylinder 8 is additionally arranged on the upper swing block body 10. The mounting seat of the push-pull cylinder 8 is fixed on the fixed mold base by screws, and the movable part is connected with the upper swing block body 10 by screws. The push-pull cylinder 8 does not move in the horizontal direction, but only moves up and down in the direction of the cylinder movement, and is used to pull the upper swing block assembly 1 downward and push the upper swing block assembly 2 upward to realize the flexible rotating return of the upper swing block assembly.

[0040] The movable trolley assembly is arranged on the fixed mold base. The fixed mold base is provided with a sliding rail, and the movable trolley assembly can be driven to slide on the sliding rail. The movable trolley assembly comprises a lower 45° pad 9, a driving assembly and a movable trolley body 7. The lower 45° pad 9 and the driving assembly are respectively arranged at two ends of the movable trolley body 7. The lower 45° pad 9 is fixedly arranged on the movable trolley body 7 by screws and is used to first contact the upper 45° pad 3 of the upper swing block assembly 1. A press machine sliding block is further arranged on the fixed mold base and is used to provide power for the driving assembly to drive the upward movement and downward movement of the upper driving guide plate 5. The driving assembly is used to drive the movable trolley body 7 to move leftward and comprises a lower driving guide plate 4 and an upper driving guide plate 5. The lower driving guide plate 4 is fixedly arranged on the movable trolley body 7 by screws, and the upper driving guide plate 5 is arranged on the fixed mold base and can be driven upward and downward by the press machine sliding block arranged above the upper driving guide plate 5. The lower end of the upper driving guide plate 5 is provided with a lower inclined surface, and the upper end of the lower driving guide plate 4 is provided with an upper inclined surface matched with the lower inclined surface of the upper driving guide plate 5. During operation, the upper driving guide plate 5 is driven downward, the lower inclined surface of the upper driving guide plate 5 is matched with the upper inclined surface of the lower driving guide plate 4 and generates a force perpendicular to the inclined surface, the force has a leftward component in the horizontal plane, and the movable trolley assembly is driven to slide leftward. The movable trolley assembly is compressed by the return nitrogen gas spring 6 while sliding leftward.

[0041] The return nitrogen gas spring 6 is arranged on the fixed mold base by screws and is used to assist the rightward return of the movable trolley assembly. When the upper driving guide plate 5 rises, the upper driving guide plate 5 is separated from the lower driving guide plate 4. At this time, the return nitrogen gas spring 6 acts to horizontally retreat the movable trolley body 7 to the right.

[0042] When the flexible rotation return is carried out by using the rotary wedge, first, the push-pull cylinder 8 is used to pull the rotary wedge upper block assembly 1 around the rotary shaft 2 downward in advance, so that the rotary wedge upper block assembly 1 is rotated to the horizontal position, and the lower surface of the upper 45° pad 3 of the rotary wedge upper block assembly 1 is flush with the upper surface of the lower 45° pad 9; then, the upper driving block guide plate 5 moves downward under the action of the press slide, the lower inclined surface of the upper driving block guide plate 5 contacts and presses the upper inclined surface of the lower driving guide plate 4, the movable trolley body 7 moves horizontally to the left, and the return nitrogen spring 6 is compressed; at this time, since the rotary wedge upper block assembly 1 and the movable trolley assembly are both in the horizontal state, when the movable trolley body 7 moves toward the rotary wedge upper block assembly 1, the lower surface of the upper 45° pad of the rotary wedge upper block assembly 1 contacts the upper surface of the lower 45° pad, and there is no inclined surface contact between them, only the contact between the upper and lower pads, so that the upper surface of the lower 45° pad pushes the rotary wedge upper block assembly 1 to the working state, effectively eliminates the linear contact of the inclined surfaces of the upper 45° pad 3 and the lower 45° pad 9, effectively eliminates the horizontal component force transmitted to the pads and the rotary shaft 2, avoids the deformation and fracture of the installation screws of the rotary shaft 2 and the pads, and also avoids the large amount of wear between the upper and lower 45° pads. In addition, during the falling process of the rotary wedge upper block assembly 1, the push-pull cylinder 8 can assist in upward pushing to ensure stable operation, and the flexible rotation return of the rotary wedge upper block assembly 1 is realized. The whole rotary wedge is simple in design, compact in structure, low in cost and strong in practicability, belongs to the flexible driving structure, and effectively avoids the safety risk problems caused by the rigid driving.

[0043] The specific embodiments of the application are described above, and through the above description, relevant personnel can make various changes and modifications without deviating from the technical idea of the application.

Claims

1. A flexible return rotary wedge structure, characterized in that, It includes a fixed mold base, an upper swing block assembly, and a movable trolley assembly. The movable trolley assembly is disposed on the fixed mold base, and the fixed mold base is provided with a slide rail. The movable trolley assembly can slide on the slide rail. The upper swing block assembly includes an upper swing block body, an upper 45° pad, a rotating shaft, and a push-pull cylinder. The rotating shaft is fixed to the upper swing block body and rotates together with the upper swing block body. The upper 45° pad is fixedly connected to the upper swing block body by screws and is used to contact the movable trolley assembly. The upper swing block body is also provided with a push-pull cylinder, which consists of a mounting base and a movable part. The mounting base is fixed on the fixed mold base, and the movable part is connected to the upper swing block body. The push-pull cylinder only moves up and down in the cylinder movement direction and is used to pull the upper swing block assembly down and push the upper swing block assembly up. The movable trolley assembly includes a lower 45° pad, a drive assembly, and a movable trolley body. The movable trolley body is mounted on a fixed mold base via a slide rail. The lower 45° pad and the drive assembly are located at opposite ends of the movable trolley body. The lower 45° pad is fixed to the movable trolley body with screws and is used to contact the upper 45° pad. The drive assembly is used to drive the movable trolley body to move horizontally towards the upward swing block assembly. The drive assembly consists of a lower drive guide plate and an upper drive guide plate. The lower drive guide plate is fixed to the movable trolley body with screws, and the upper drive guide plate is mounted on the fixed mold base. It can be driven up and down by the press slider. The lower end of the upper drive guide plate has a lower inclined surface, and the upper end of the lower drive guide plate has an upper inclined surface that matches the lower inclined surface of the upper drive guide plate. During operation, the upper drive guide plate is driven downward, and its lower inclined surface comes into contact with the upper inclined surface of the lower drive guide plate, generating a force perpendicular to the inclined surface. This force has a horizontal component, driving the movable trolley assembly to slide horizontally towards the upward swing block assembly. When the flexible return rotary wedge structure is in operation, the push-pull cylinder first pulls the upper swing block assembly down around the rotation axis, causing it to rotate to a horizontal position. Then, the upper drive block guide plate moves downward, and its lower inclined surface contacts and presses against the upper inclined surface of the lower drive guide plate, driving the movable trolley body to move horizontally to the left. The lower surface of the upper 45° pad of the upper swing block assembly contacts the upper surface of the lower 45° pad, causing the upper surface of the lower 45° pad to press against the upper swing block assembly to the working state.

2. The flexible return rotary wedge structure according to claim 1, characterized in that, It also includes a return nitrogen spring, which is mounted on the fixed mold base by screws to assist the movable trolley assembly in moving horizontally away from the upper swing block assembly.

3. The flexible return rotary wedge structure according to claim 1, characterized in that, A press slider is also provided on the fixed mold base, located above the drive assembly, for driving the upper drive guide plate to move up and down.

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