Connecting rod type pressing device, material conveying device and axis position determining method

Abstract

The invention relates to the technical field of material conveying, and particularly discloses a connecting rod type pressing device, a material conveying device and an axis position determining method.The connecting rod type pressing device comprises a bottom plate assembly, a pressing plate assembly, a connecting rod assembly and a transverse driving assembly, and the transverse driving assembly is installed on the bottom plate assembly; the driving end of the transverse driving assembly is connected with the connecting rod assembly, and the transverse driving assembly is used for driving the pressing plate assembly to press or release the workpiece along the arc guide groove through the connecting rod assembly. According to the connecting rod type pressing device, the material conveying device and the axis position determining method, the problems that an existing pressing device occupies the space above a conveying device, and conveying operation of workpieces large in height size is easily affected can be effectively solved.

Description

Technical Field

[0001] The present invention relates to the technical field of material transportation, and particularly to a link-type pressing device, a material transportation device, and an axis position determination method. Background Art

[0002] In the process of PCB printing production, a conveying device composed of an intermittent double conveyor belt is usually used to perform the conveying operation on the PCB substrate. For specific process requirements such as visual inspection, the prior art generally sets a lifting mechanism in the gap area between the double conveyor belts, and configures a pressing device on the side of the conveying device to cooperate. Its working process is as follows: after the lifting mechanism lifts the PCB substrate from the bottom and separates it from the conveyor belt, the workpiece pressing plates of the pressing devices on both sides press down on the edges of the PCB substrate, thereby realizing the positioning and fixing of the PCB substrate.

[0003] The existing pressing device usually includes two core components: a workpiece pressing plate and a linear driving mechanism. Specifically, the workpiece pressing plate needs to meet the following structural characteristics:

[0004] First, the bottom surface of the workpiece pressing plate needs to be higher than the conveying device to form a downward pressing stroke;

[0005] Second, the end of the workpiece pressing plate needs to extend towards the inner side of the conveying device to ensure that it can cover the edge area of the PCB substrate.

[0006] However, this structural design has significant defects:

[0007] The occupation of the space above the conveying channel by the workpiece pressing plate limits the effective height of the material transportation space. Especially when processing workpieces with larger height dimensions, it is extremely easy to cause mechanism interference or transportation blockage problems. For example, generally, the height dimension of the PCB substrate is small, and setting a pressing device on the conveying device will not affect the normal transportation operation of the PCB substrate. However, if due to changes in the production line or other situations, it is necessary to use this conveying device to transport workpieces with larger height dimensions such as packaging cartons, the end of the workpiece pressing plate extending towards the inner side of the conveying device will block the packaging carton and affect the normal transportation operation of the packaging carton.

[0008] Therefore, it is necessary to improve the existing pressing device to solve the problem that it occupies the space above the conveying device and is likely to affect the conveying operation of workpieces with larger height dimensions.

[0009] The above information disclosed in this background section is only included to enhance the understanding of the background of the present disclosure, and thus may include information that does not form the prior art already known to those of ordinary skill in the art at present. Summary of the Invention

[0010] An object of the present invention is to provide a link type pressing device, a material conveying device and an axis position determination method, which can effectively solve the problem that the existing pressing device occupies the space above the conveying device and easily affects the conveying operation of workpieces with larger height dimensions.

[0011] To achieve the above object, in a first aspect, the present invention provides a link type pressing device for cooperating with a lifting mechanism to press a workpiece on a conveying device, including:

[0012] A bottom plate assembly, on the top of the bottom plate assembly is provided with an avoidance space, and the bottom plate assembly is further provided with an arc guide groove located below the avoidance space;

[0013] A pressing plate assembly, the pressing plate assembly is located in the avoidance space;

[0014] A link assembly, the upper end of the link assembly is connected to the pressing plate assembly, and the lower end is movably connected to the bottom plate assembly along the arc guide groove;

[0015] A transverse driving assembly, the transverse driving assembly is installed on the bottom plate assembly, and the driving end of the transverse driving assembly is connected to the link assembly, for:

[0016] Driving the pressing plate assembly to move along the arc guide groove towards the workpiece through the link assembly until the edge of the pressing plate assembly close to the workpiece protrudes outside the bottom plate assembly and reaches above the edge position of the workpiece;

[0017] And driving the pressing plate assembly to move along the arc guide groove away from the workpiece through the link assembly until the pressing plate assembly is received in the avoidance space.

[0018] Optionally, the link assembly includes:

[0019] A pressing plate supporting plate, the pressing plate supporting plate is fixedly arranged at the bottom of the pressing plate assembly;

[0020] A transverse moving slider, the transverse moving slider is slidably arranged relative to the bottom plate assembly perpendicular to the feeding direction of the conveying device;

[0021] A long link, the upper end of the long link is rotatably connected to the pressing plate supporting plate, the middle part is rotatably connected to the transverse moving slider, and the lower end moves along the arc guide groove;

[0022] A short link, the upper end of the short link is rotatably connected to the pressing plate supporting plate, and the lower end is rotatably connected to the transverse moving slider.

[0023] Optionally, one end of the arc guide groove close to the workpiece is lower than the end of the arc guide groove far from the workpiece, so that:

[0024] When the lower end of the long connecting rod is in the pressing state at the end of the arc guide groove close to the workpiece, the edge of the pressing plate assembly close to the workpiece protrudes outside the bottom plate assembly and reaches above the edge position of the workpiece;

[0025] When the lower end of the long connecting rod is in the receiving state at the end of the arc guide groove far from the workpiece, the pressing plate assembly is received in the avoidance space.

[0026] Optionally,

[0027] When the lower end of the long connecting rod is in the raised state at the middle position of the arc guide groove, the bottom surface of the edge of the pressing plate assembly close to the workpiece is higher than the top surface of the bottom plate assembly;

[0028] Wherein, during the switching process of the pressing state - raised state - receiving state of the long connecting rod and the short connecting rod, they are always inclined upward in the direction close to the workpiece; and, when the pressing plate assembly is closer to the workpiece, the long connecting rod and the short connecting rod tend to be in a vertical state.

[0029] Optionally, a cylindrical limiting member is provided at the lower end of the long connecting rod, and the cylindrical limiting member passes through the arc guide groove.

[0030] Optionally, when the lower end of the long connecting rod is at the end of the arc guide groove far from the workpiece, the top surfaces of the bottom plate assembly and the pressing plate assembly are flush.

[0031] Optionally, the cylindrical limiting member is a limit pin, a roller or a bearing.

[0032] Optionally, the transverse driving assembly includes:

[0033] A transverse driving linear driving mechanism, which is fixedly arranged on the bottom plate assembly;

[0034] A driving connection plate, one end of which is fixedly arranged at the driving end of the transverse driving linear driving mechanism, and the other end is provided with a strip-shaped groove extending in the vertical direction; wherein, the pressing plate supporting plate is vertically movably connected to the driving connection plate along the strip-shaped groove.

[0035] On the other hand, a material conveying device is provided, including a conveying device of an intermittent double conveyor belt type, a lifting mechanism located between the two conveyor belts, and any one of the link type pressing devices installed on the side of the conveying device.

[0036] On the other hand, a method for determining the axis position of the arc guide groove is provided, which is applicable to the link type pressing device, and includes:

[0037] Establish a coordinate system with the bottom plate assembly as the reference;

[0038] Specify the distance dimension L2 from the axis of rotation of the long connecting rod and the cross - slide block to the axis of the cylindrical limiting member;

[0039] Make the link - type pressing device in the pressing state, and record the coordinate position A where the axis of the cylindrical limiting member is located at this time;

[0040] Make the link - type pressing device in the raised state, and record the coordinate position B where the axis of the cylindrical limiting member is located at this time;

[0041] Make the link - type pressing device in the storage state, and record the coordinate position C where the axis of the cylindrical limiting member is located at this time;

[0042] Respectively draw the perpendicular bisectors of the straight line A - B and the straight line B - C. The axis where the intersection point Q of the two perpendicular bisectors is located is the axis of the arc - shaped guide groove.

[0043] The beneficial effects of the present invention are as follows: Provide a link - type pressing device, a material conveying device and an axis position determination method,

[0044] The arc - shaped guide groove converts the linear drive of the cross - drive assembly into the compound motion (lateral + vertical) of the pressing plate assembly by restricting the movement trajectory of the lower end of the link assembly, realizing the coordinated actions of extending and pressing and retracting and avoiding;

[0045] The avoidance space enables the pressing plate assembly to be completely hidden inside the bottom plate assembly in the storage state, eliminating the occupation of the space above the conveying device and ensuring the passage of large - size workpieces;

[0046] The linkage between the cross - drive assembly and the link assembly realizes the precise position control of the pressing plate assembly through mechanical transmission, without the need for an additional vertical drive mechanism, saving equipment costs.

[0047] Therefore, through the circular arc trajectory movement of the link assembly, the link - type pressing device makes the pressing plate assembly extend and press the workpiece when pressing, and completely retracts in the non - working state, which not only meets the pressing function requirements, but also maximally releases the space height of the conveying channel, solving the problem that the traditional pressing device interferes with the transmission of large - size workpieces. Brief Description of the Drawings

[0048] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0049] Figure 1 Structural schematic diagram of the material transmission device provided for the embodiment;

[0050] Figure 2 Schematic cross-sectional view of the link-type pressing device provided for the embodiment in the pressing state;

[0051] Figure 3 Schematic diagram of the state switching of the link-type pressing device provided for the embodiment;

[0052] Figure 4 Flowchart of the method for determining the axis position of the arc guide groove provided for the embodiment;

[0053] Figure 5 Schematic diagram of the auxiliary line for the method of determining the axis position of the arc guide groove provided for the embodiment.

[0054] In the figure:

[0055] 100, conveying device; 200, link-type pressing device;

[0056] 1, bottom plate assembly; 101, avoidance space; 102, arc guide groove;

[0057] 2, pressing plate assembly;

[0058] 3, link assembly;

[0059] 301, pressing plate support plate;

[0060] 302, transverse sliding block;

[0061] 303, long link;

[0062] 304, short link;

[0063] 305, cylindrical limit member;

[0064] 4, transverse drive assembly; 401, transverse drive linear drive mechanism; 402, drive connection plate; 4021, strip slot. Detailed implementation manners

[0065] Referring to "embodiment" in the present invention means that the specific features, structures or characteristics described in connection with the embodiment may be included in at least one embodiment of the present invention. The term "embodiment" appearing at various positions in the specification does not necessarily refer to the same embodiment, nor is it particularly limited to the independence or relevance with other embodiments. In principle, in the present invention, as long as there is no technical contradiction or conflict, the technical features mentioned in each embodiment can be combined in any way to form the corresponding implementable technical solution.

[0066] Unless otherwise defined, the technical terms used herein have the same meanings as those commonly understood by those skilled in the technical field to which the present invention pertains; the use of the relevant terms herein is only for describing specific embodiments and is not intended to limit the present invention.

[0067] In the description of the present invention, the term "and / or" is an expression used to describe the logical relationship between objects, indicating that there can be three relationships. For example, A and / or B means: the existence of A, the existence of B, and the simultaneous existence of both A and B. Additionally, the character " / " herein generally represents an "or" logical relationship between the associated objects before and after.

[0068] In the present invention, terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual quantitative, primary-secondary, or sequential relationships, etc. between these entities or operations.

[0069] Without further limitations, in the present invention, the expressions "comprising", "including", "having", or other similar expressions used in a statement are intended to cover non-exclusive inclusion. These expressions do not exclude the possibility that there may be additional elements in the process, method, or product including the stated elements, such that a process, method, or product including a series of elements may not only include those defined elements, but also include other elements not explicitly listed, or elements inherent to such a process, method, or product.

[0070] Similar to the understanding in the "Examination Guidelines", in the present invention, expressions such as "greater than", "less than", "exceeding", etc. are understood not to include the number itself; expressions such as "above", "below", "within", etc. are understood to include the number itself. In addition, in the description of the embodiments of the present invention, the meaning of "a plurality of" is two or more (including two), and similar expressions related to "many", such as "multiple groups", "multiple times", etc., are understood in the same way, unless otherwise specifically defined.

[0071] In the description of the embodiments of the present invention, the spatially related expressions used, such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "perpendicular", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the specific embodiment or the accompanying drawings. It is only for the convenience of describing the specific embodiments of the present invention or facilitating the understanding of the reader, and does not indicate or imply that the indicated device or component must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, it should not be construed as a limitation to the embodiments of the present invention.

[0072] Unless otherwise clearly specified or defined, in the description of the embodiments of the present invention, terms such as "installation", "connection", "linkage", "fixation", "setting", etc. shall be understood in a broad sense. For example, the "connection" may be a fixed connection, a detachable connection, or an integral setting; it may be a mechanical connection, an electrical connection, or a communication connection; it may be a direct connection or an indirect connection through an intermediate medium; it may be the communication inside two components or the interaction relationship between two components. For those skilled in the art to which the present invention pertains, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0073] The present invention provides a link-type pressing device, a material transmission device, and an axis position determination method, which are applicable to scenarios in an automated production line where it is necessary to temporarily press and lift a workpiece (such as a PCB substrate) and avoid interfering with the transmission of large-sized materials. The precise pressing and complete storage of the pressing plate are achieved through the combined movement of the link, taking into account both the positioning reliability and the release of the channel space.

[0074] As in Embodiments 1-2, next, various embodiments of the link-type pressing device, the material transmission device, and the axis position determination method of the present invention will be introduced with reference to the accompanying drawings.

[0075] Embodiment 1

[0076] See Figure 1 and Figure 2 In this embodiment, a material transmission device is provided, which includes a conveying device 100 of an intermittent double conveyor belt type, a lifting mechanism located between the two conveyor belts, and a link-type pressing device 200 installed on the side of the conveying device 100.

[0077] Specifically, the link-type pressing device 200 is used to cooperate with the lifting mechanism to press the workpiece on the conveying device 100, and it includes:

[0078] A bottom plate assembly 1, the top of the bottom plate assembly 1 is provided with an avoidance space 101, and the bottom plate assembly 1 is also provided with an arc guide groove 102 located below the avoidance space 101;

[0079] A pressing plate assembly 2, the pressing plate assembly 2 is located within the avoidance space 101;

[0080] A link assembly 3, the upper end of the link assembly 3 is connected to the pressing plate assembly 2, and the lower end is movably connected to the bottom plate assembly 1 along the arc guide groove 102;

[0081] A transverse drive assembly 4, the transverse drive assembly 4 is installed on the bottom plate assembly 1, and the drive end of the transverse drive assembly 4 is connected to the link assembly 3. The transverse drive assembly 4 is mainly used for:

[0082] ①Drive the pressing plate assembly 2 to move along the arc guiding groove 102 towards the workpiece through the connecting rod assembly 3 until the edge of the pressing plate assembly 2 close to the workpiece protrudes outside the bottom plate assembly 1 and reaches above the edge position of the workpiece.

[0083] ②Drive the pressing plate assembly 2 to move along the arc guiding groove 102 away from the workpiece through the connecting rod assembly 3 until the pressing plate assembly 2 is received in the avoidance space 101.

[0084] The connecting rod type pressing device 200 provided in this embodiment has the following working process:

[0085] (1) Initial state (received state):

[0086] The pressing plate assembly 2 is completely received in the avoidance space 101 of the bottom plate assembly 1. For example, the top surface of the pressing plate assembly 2 is flush with or lower than the top surface of the bottom plate assembly 1 to avoid occupying the space above the conveying device 100.

[0087] It can be understood that at this time, even if the height dimension of the workpiece is large, it can freely pass above the double conveyor belts of the conveying device 100 without any space limitation.

[0088] (2) Trigger of the pressing action:

[0089] When the lifting mechanism lifts the workpiece (such as a PCB substrate, etc.) to separate it from the conveying device 100, the transverse driving assembly 4 is activated, and its driving end pushes the connecting rod assembly 3 to move along the arc guiding groove 102 of the bottom plate assembly 1.

[0090] (3) Extension and downward pressure of the pressing plate assembly 2:

[0091] The transverse driving assembly 4 drives the connecting rod assembly 3, forcing the lower end of the connecting rod assembly 3 to slide along the arc guiding groove 102 towards the workpiece.

[0092] Since the upper end of the connecting rod assembly 3 is connected to the pressing plate assembly 2, the arc movement trajectory of the lower end of the connecting rod will drive the pressing plate assembly 2 to perform horizontal movement and vertical movement simultaneously:

[0093] ① Horizontal movement: The pressing plate assembly 2 moves horizontally from the avoidance space 101 towards the conveying device 100 until the edge on its side close to the workpiece protrudes outside the bottom plate assembly 1, covering the edge area of the workpiece.

[0094] ② Vertical movement: The arc guiding groove 102 of the connecting rod assembly 3 is designed such that the pressing plate assembly 2 first moves upward to a height above the avoidance space 101 during the extension process to avoid interference with the bottom plate assembly 1 during subsequent horizontal movement, and then moves downward to cooperate with the lifting mechanism to achieve pressing and fixing of the workpiece.

[0095] (3) Maintaining the clamping state:

[0096] The pressing plate assembly 2 maintains a stable position through the cooperation of the connecting rod assembly 3 and the arc guide groove 102, ensuring that the workpiece is reliably pressed in the jacking state.

[0097] (4) Reset action (retraction):

[0098] When the jacking mechanism descends and resets, the transverse drive assembly 4 drives the connecting rod assembly 3 in the reverse direction, causing the lower end thereof to slide along the arc guide groove 102 away from the workpiece.

[0099] The reverse movement of the connecting rod assembly 3 drives the pressing plate assembly 2 to retract laterally into the avoidance space 101 (first moving upward and then downward), until the pressing plate assembly 2 is finally retracted into the avoidance space 101 again, avoiding interference with the normal transmission of subsequent workpieces.

[0100] During the above process:

[0101] The arc guide groove 102 converts the linear drive of the transverse drive assembly 4 into a compound movement (lateral + vertical) of the pressing plate assembly 2 by restricting the movement trajectory of the lower end of the connecting rod assembly 3, realizing the coordinated actions of extending and pressing and retracting and avoiding;

[0102] The avoidance space 101 enables the pressing plate assembly 2 to be completely hidden inside the bottom plate assembly 1 in the retracted state, eliminating the occupation of the space above the conveying device 100 and ensuring the passage of large-sized workpieces;

[0103] The linkage between the transverse drive assembly 4 and the connecting rod assembly 3 realizes precise position control of the pressing plate assembly 2 through mechanical transmission, without the need for an additional vertical drive mechanism, saving equipment costs.

[0104] Therefore, through the circular arc trajectory movement of the connecting rod assembly 3, the connecting rod type pressing device 200 makes the pressing plate assembly 2 extend and press down the workpiece when pressing, and completely retracts in the non-working state, which not only meets the pressing function requirements, but also maximally releases the space height of the conveying channel, solving the problem that the traditional pressing device interferes with the transmission of large-sized workpieces.

[0105] In this embodiment, the connecting rod assembly 3 includes:

[0106] A pressing plate supporting plate 301, which is fixedly arranged at the bottom of the pressing plate assembly 2;

[0107] A transverse moving slider 302, which is slidably arranged relative to the bottom plate assembly 1 perpendicular to the feeding direction of the conveying device 100;

[0108] The long connecting rod 303, the upper end of the long connecting rod 303 is rotatably connected to the pressing plate supporting plate 301, the middle part is rotatably connected to the transverse moving slider 302, and the lower end moves along the arc guide groove 102;

[0109] The short connecting rod 304, the upper end of the short connecting rod 304 is rotatably connected to the pressing plate supporting plate 301, and the lower end is rotatably connected to the transverse moving slider 302.

[0110] Furthermore, a cylindrical limiting member 305 is provided at the lower end of the long connecting rod 303, and the cylindrical limiting member 305 passes through the arc guide groove 102.

[0111] In this embodiment, one end of the arc guide groove 102 close to the workpiece is lower than the end of the arc guide groove 102 far from the workpiece, so that:

[0112] ① When the lower end of the long connecting rod 303 is in the pressing state at the end of the arc guide groove 102 close to the workpiece, the edge of the pressing plate assembly 2 close to the workpiece protrudes outside the bottom plate assembly 1 and reaches above the edge position of the workpiece;

[0113] ② When the lower end of the long connecting rod 303 is in the raised state at the middle position of the arc guide groove 102, the bottom surface of the edge of the pressing plate assembly 2 close to the workpiece is higher than the top surface of the bottom plate assembly 1;

[0114] ③ When the lower end of the long connecting rod 303 is in the receiving state at the end of the arc guide groove 102 far from the workpiece, the pressing plate assembly 2 is received in the avoidance space 101.

[0115] Among them, during the switching process of the long connecting rod 303 and the short connecting rod 304 between the pressing state - raised state - receiving state, they are always inclined upward in the direction close to the workpiece; and, when the pressing plate assembly 2 is closer to the workpiece, the long connecting rod 303 and the short connecting rod 304 tend to be in a vertical state.

[0116] Optionally, when the lower end of the long connecting rod 303 is at the end of the arc guide groove 102 far from the workpiece, the top surfaces of the bottom plate assembly 1 and the pressing plate assembly 2 are flush.

[0117] Optionally, the cylindrical limiting member 305 is a limiting pin, a roller or a bearing.

[0118] It should be noted that the detailed working process of the connecting rod assembly 3 is as follows:

[0119] (1) Initial state (receiving)

[0120] The lower end of the long connecting rod 303 is located at the end (high point) of the arc guide groove 102 away from the workpiece, and the short connecting rod 304 is in an inclined state.

[0121] The pressing plate assembly 2 is completely received in the avoidance space 101 of the bottom plate assembly 1, and the top surface of the pressing plate is flush with the top surface of the bottom plate to ensure that there is no structural interference above the conveying channel.

[0122] (2) Start of the pressing action

[0123] The transverse driving assembly 4 drives the driving connecting plate 402 to move horizontally, driving the pressing plate supporting plate 301 to move towards the workpiece.

[0124] The horizontal movement of the pressing plate supporting plate 301, through the linkage of the long connecting rod 303 and the short connecting rod 304, forces the transverse sliding block 302 to slide horizontally synchronously.

[0125] The lower end of the long connecting rod 303 slides along the arc guide groove 102 towards the low point close to the workpiece.

[0126] (3) Realization of the composite motion trajectory

[0127] ① Horizontal extension stage:

[0128] When the lower end of the long connecting rod 303 slides along the arc groove towards the low point, the long connecting rod 303 and the short connecting rod 304 gradually tend to be vertical. Therefore, it not only drives the pressing plate assembly 2 to move horizontally, but also drives the pressing plate assembly 2 to move upward by a relatively large distance, so that the bottom surface of the edge position of the pressing plate assembly 2 is higher than the top surface of the bottom plate assembly 1, so as to avoid interference between the pressing plate assembly 2 and the bottom plate assembly 1 during the subsequent horizontal movement.

[0129] The edge of the pressing plate assembly 2 gradually protrudes out of the bottom plate and covers the edge area of the workpiece.

[0130] ② Vertical pressing stage:

[0131] When the lower end of the long connecting rod 303 slides to the lowest point (pressing position) of the arc groove, the long connecting rod 303 and the short connecting rod 304 tend to be in a vertical state, forming a stable support.

[0132] The pressing plate supporting plate 301 is driven by the change in the angle of the connecting rod to generate a small downward vertical displacement, and finally cooperates with the jacking mechanism to press the workpiece.

[0133] ③ Characteristics of the motion trajectory:

[0134] By restricting the motion trajectory of the lower end of the long connecting rod 303 through the arc guide groove 102, the linear drive of the transverse driving assembly 4 is converted into the composite motion of the pressing plate assembly 2 of "first slightly horizontally extending + greatly rising, then greatly horizontally extending + slightly pressing down". In this way, it can not only avoid interference between the pressing plate assembly 2 and the bottom plate assembly 1, but also ensure the normal extension and recovery of the pressing plate assembly 2.

[0135] (4)Reset action

[0136] The horizontal drive assembly 4 drives in the reverse direction, and the lower end of the long connecting rod 303 retracts along the arc groove to the high position point.

[0137] The long connecting rod 303 and the short connecting rod 304 gradually tend to be horizontal. While the pressing plate support plate 301 moves horizontally, it first slightly lifts upward to disengage from the workpiece, and then moves downward significantly to retract and avoid the avoidance space 101.

[0138] The pressing plate assembly 2 is finally completely hidden in the bottom plate to avoid interference with the subsequent workpiece transfer.

[0139] It should be noted that the core structure of the above connecting rod assembly 3 has the following synergistic effects:

[0140] ① Four-bar linkage mechanism design (pressing plate support plate 301 + long connecting rod 303 + short connecting rod 304 + transverse sliding block 302)

[0141] Through the cross-hinge of the long connecting rod 303 and the short connecting rod 304, a mechanical dead point locking effect is formed: when the lower end of the long connecting rod 303 is at the arc groove pressing position, the connecting rod tends to be in a vertical state, forming a self-locking structure to ensure the stability of the pressing force.

[0142] The transverse sliding block 302 serves as a sliding fulcrum to decouple the horizontal movement and vertical movement of the pressing plate support plate 301 and avoid movement interference.

[0143] ② Trajectory control of the arc guide groove 102

[0144] The arc groove is at a low position point (pressing position) near the workpiece end, at a high position point (receiving position) far from the workpiece end, and the middle part is a transition zone.

[0145] When the lower end of the long connecting rod 303 slides from the high position point to the low position point, the tangent direction of its movement trajectory forces the pressing plate assembly 2 to complete a coherent action of "lateral extension → lifting → pressing down".

[0146] The cooperation between the cylindrical limit member 305 and the arc groove not only ensures the movement accuracy but also reduces the sliding friction.

[0147] ③ Height compensation mechanism

[0148] During the extension process of the pressing plate assembly 2, when the lower end of the long connecting rod 303 passes through the middle part of the arc groove, the bottom surface of the pressing plate edge is higher than the top surface of the bottom plate (elevated state), avoiding scraping between the pressing plate and the edge of the bottom plate.

[0149] During reset, the pressing plate assembly 2 needs to first lift above the avoidance space 101 and then retract horizontally to ensure the smoothness of the receiving action.

[0150] ④ Mechanical self-locking enhances reliability

[0151] When the pressing plate assembly 2 is in the pressing position, the long connecting rod 303 and the short connecting rod 304 are close to the vertical state, forming a mechanical dead point. Even if the transverse driving assembly 4 loses pressure accidentally, the pressing force can still be maintained without release.

[0152] ⑤ Modular adaptability

[0153] By adjusting the radius of the arc guide groove 102 and the stroke of the transverse moving slider 302, the conveyor device 100 with different widths can be quickly adapted.

[0154] In this embodiment, the transverse driving assembly 4 includes:

[0155] A transverse driving linear driving mechanism 401, which is fixedly arranged on the bottom plate assembly 1;

[0156] A driving connection plate 402, one end of which is fixedly arranged at the driving end of the transverse driving linear driving mechanism 401, and the other end is provided with a strip-shaped groove 4021 extending in the vertical direction; wherein, the pressing plate supporting plate 301 is connected to the driving connection plate 402 through the strip-shaped groove 4021 and is movable up and down.

[0157] After using fasteners such as bolts to pass through the strip-shaped groove 4021 and then fastening and connecting the pressing plate supporting plate 301, when the transverse driving linear driving mechanism 401 drives the driving connection plate 402 to move horizontally:

[0158] The pressing plate supporting plate 301 will move horizontally along with the driving connection plate 402 (and thus approach or move away from the workpiece). Synchronously, the pressing plate supporting plate 301 drives the transverse moving slider 302 to move horizontally through two connecting rods;

[0159] Since the height position of the transverse moving slider 302 in the vertical direction remains unchanged, therefore, under the action of the connecting rod, the height of the pressing plate supporting plate 301 changes during the transverse movement. Specifically, the pressing plate supporting plate 301 will first rise and then fall, and then drive the pressing plate assembly 2 to first rise and then fall. The design of the strip-shaped groove 4021 is to avoid affecting the movement of the pressing plate supporting plate 301 in the vertical direction.

[0160] It should be noted that the driving connection plate 402 is directly connected to the pressing plate supporting plate 301, rather than the transverse moving slider 302, which is beneficial to increasing the downward pressure moment of the pressing plate assembly 2 on the workpiece and realizing the clamping and fixing operation with large pressure.

[0161] It should be noted that the linear driving mechanism mentioned in the present invention can be a cylinder, a hydraulic cylinder, an electric cylinder or a motor screw linear module, etc., and the rotary driving mechanism mentioned can be a brushed motor, a brushless motor, or a rotary cylinder, etc. The present invention does not limit the specific structural forms of the linear driving mechanism and the rotary driving mechanism.

[0162] In summary, the link-type pressing device 200 and the material conveying device provided in this embodiment have the following advantages:

[0163] ① Spatial optimization design: By means of the avoidance space 101 of the bottom plate assembly 1 and the complete accommodation of the pressing plate assembly 2, the occupation of the space above the conveying channel is eliminated, ensuring unobstructed passage of large-sized workpieces.

[0164] ② Composite motion control: The cooperation of the arc guide groove 102 and the link assembly 3 converts the linear drive of the transverse drive assembly 4 into the "lateral extension + vertical downward pressure" composite motion of the pressing plate assembly 2, avoiding motion interference and eliminating the need for additional vertical drive.

[0165] ③ Mechanical self-locking stability: The long link 303 and the short link 304 are close to vertical in the pressing state, forming a mechanical dead point lock, ensuring stable and reliable pressing force and preventing accidental loosening.

[0166] ④ Modular adaptability: By adjusting the radius of the arc guide groove 102 and the stroke of the transverse sliding block 302, it can quickly adapt to conveying devices 100 and workpiece specifications of different widths or heights.

[0167] ⑤ Precise trajectory constraint: The cylindrical limiting member 305 slides along the arc guide groove 102, precisely controlling the motion trajectory of the pressing plate assembly 2, avoiding deviation and reducing frictional losses.

[0168] ⑥ Height compensation mechanism: During the extension process of the pressing plate assembly 2, it avoids scraping against the edge of the bottom plate by being in a raised state (the bottom surface is higher than the top surface of the bottom plate), ensuring smooth operation.

[0169] ⑦ Structural simplification and low cost: The linkage design of the transverse drive assembly 4 and the link assembly 3 replaces the traditional multi-axis drive, reducing the number of components and the manufacturing cost of the equipment.

[0170] ⑧ Motion decoupling design: The transverse sliding block 302 separates the horizontal movement and the vertical movement degrees of freedom, avoiding jamming of the pressing plate support plate 301 during the composite motion.

[0171] ⑨ Quick reset and avoidance: When resetting, the pressing plate assembly 2 first lifts and then retracts laterally, avoiding collision with the conveying device 100 or the workpiece, and ensuring the efficiency of continuous operation.

[0172] ⑩ Synchronous pressing and jacking: The downward pressure of the pressing plate assembly 2 and the lifting of the jacking mechanism act in coordination to form a two-way clamping force, improving the positioning accuracy and stability of the workpiece.

[0173] Embodiment 2

[0174] This embodiment provides a method for determining the axis position of an arc guide groove, which is applicable to the link-type pressing device and the material conveying device provided in Embodiment 1.

[0175] It should be noted that without the arc guide groove, when the transverse drive assembly drives the link assembly horizontally, the link assembly will not first lift upward to avoid the bottom plate assembly and then move horizontally, but will directly hit the bottom plate assembly horizontally;

[0176] The main reason that can enable the bottom plate assembly to move horizontally and upward to avoid is that the frictional resistance between the arc guide groove and the cylindrical limiting member hinders the horizontal movement of the lower end of the long link, making the horizontal movement speeds of the upper and lower ends of the long link inconsistent. Therefore, the design of the arc guide groove is very important.

[0177] See Figures 3 - 5 , this embodiment provides a method for determining the axis position of the arc guide groove 102, which is used to determine the axis position of the arc guide groove 102 of the link type pressing device 200 and the material conveying device in Embodiment 1.

[0178] After the axis position is determined, only the groove width dimension of the arc guide groove 102 can be determined according to the diameter dimension of the cylindrical limiting member 305, and then the grooving operation of the arc guide groove 102 can be completed.

[0179] It should be noted that before determining the axis position of the arc guide groove 102, the entire link assembly 3 should be fabricated first. Specifically, the fabrication method of the link assembly 3 is as follows:

[0180] S101: Specify the height position and the horizontal sliding stroke of the transverse sliding block 302;

[0181] S102: Make the pressing plate assembly 2 protrude near the edge of the workpiece outside the bottom plate assembly 1 and reach above the edge position of the workpiece. In this pressing state, first specify the installation positions of the pressing plate supporting plate 301 and the short link 304, and then specify the installation positions of the transverse sliding block 302 and the short link 304, thereby determining the length dimension L1 from the rotation axis of the short link 304 and the transverse sliding block 302 to the rotation axis of the short link 304 and the pressing plate supporting plate 301;

[0182] S103: Make the pressing plate assembly 2 be received in the avoidance space 101. In this received state, specify the distance dimension between the long link 303 and the short link 304, thereby determining the installation position between the long link 303 and the transverse sliding block 302.

[0183] It should be noted that the specific structure of the link assembly 3 itself is not the key of this embodiment. Its fabrication process involves multiple parameters that need to be specified manually. Therefore, according to different design requirements, link assemblies 3 with different dimensional parameters may be obtained. This embodiment does not make any limitations in this regard.

[0184] The focus of this embodiment is to determine the axis position of the arc guide groove 102 according to the obtained connecting rod assembly 3. Specifically, the method for determining the axis position of the arc guide groove 102 further includes the following steps:

[0185] S201: Establish a coordinate system with the bottom plate assembly 1 as the reference;

[0186] S202: Specify the distance dimension L2 from the rotation axis of the long connecting rod 303 and the transverse slider 302 to the axis of the cylindrical limiting member 305;

[0187] S203: Make the link type pressing device 200 in the pressing state, and record the coordinate position A where the axis of the cylindrical limiting member 305 is located at this time;

[0188] S204: Make the link type pressing device 200 in the raised state, and record the coordinate position B where the axis of the cylindrical limiting member 305 is located at this time;

[0189] S205: Make the link type pressing device 200 in the retracted state, and record the coordinate position C where the axis of the cylindrical limiting member 305 is located at this time;

[0190] S206: Respectively draw the perpendicular bisectors of the straight line A - B and the straight line B - C. The axis where the intersection point Q of the two perpendicular bisectors is located is the axis of the arc guide groove 102.

[0191] The arc guide groove 102 manufactured according to the above method can generate a certain frictional resistance with the cylindrical limiting member 305 to hinder the transverse movement of the lower end of the long connecting rod 303, thereby making the transverse movement speeds of the upper and lower ends of the long connecting rod 303 inconsistent. Thus, the composite movement of the pressing plate assembly 2 in the horizontal and vertical directions is realized without causing the jamming phenomenon of the connecting rod assembly 3.

[0192] On the basis of Embodiment 1, for the features not explained in this embodiment, the explanations in Embodiment 1 are adopted and will not be elaborated here.

[0193] Finally, it should be noted that although the above embodiments have been described in the text and drawings of the specification of the present application, the patent protection scope of the present application cannot be limited thereby. Any technical solutions obtained by equivalent structure or equivalent process substitution or modification using the content recorded in the text and drawings of the specification of the present application based on the essential concept of the present application, as well as directly or indirectly implementing the technical solutions of the above embodiments in other related technical fields, etc., are all included in the patent protection scope of the present application.

Claims

1. A connecting rod type pressing device is used to cooperate with a jacking mechanism to press workpieces on a conveying device (100), and is characterized in that, include: A bottom plate assembly (1), wherein a relief space (101) is provided at the top of the bottom plate assembly (1), and the bottom plate assembly (1) is further provided with an arc guide groove (102) located below the relief space (101); A pressure plate assembly (2), the pressure plate assembly (2) being located in the avoidance space (101); A connecting rod assembly (3), the upper end of the connecting rod assembly (3) being connected to the pressure plate assembly (2), and the lower end of the connecting rod assembly (3) being movably connected to the base plate assembly (1) along the circular arc guide groove (102); A transverse drive assembly (4), the transverse drive assembly (4) being mounted on the base plate assembly (1), and the driving end of the transverse drive assembly (4) being connected to the connecting rod assembly (3), for: The connecting rod assembly (3) drives the pressing plate assembly (2) to move along the arc guide groove (102) in a direction approaching the workpiece until the pressing plate assembly (2) protrudes from the edge of the workpiece to the outside of the base plate assembly (1) and reaches above the edge of the workpiece; The connecting rod assembly (3) drives the pressing plate assembly (2) to move along the circular arc guide groove (102) in a direction away from the workpiece until the pressing plate assembly (2) is received in the avoidance space (101).

2. The link type pressing device according to claim 1, wherein The connecting rod assembly (3) comprises: A pressure plate supporting plate (301), wherein the pressure plate supporting plate (301) is fixedly arranged at the bottom of the pressure plate assembly (2); A transverse sliding block (302), the transverse sliding block (302) being slidably arranged relative to the bottom plate assembly (1) in a direction perpendicular to the feeding direction of the conveying device (100); A long connecting rod (303), wherein the upper end of the long connecting rod (303) is rotatably connected to the pressure plate support plate (301), the middle part is rotatably connected to the transverse sliding block (302), and the lower end moves along the circular arc guide groove (102); A short connecting rod (304), wherein the upper end of the short connecting rod (304) is rotatably connected to the pressure plate supporting plate (301), and the lower end of the short connecting rod (304) is rotatably connected to the transverse sliding block (302).

3. The link-type pressing device according to claim 2, wherein, An end of the circular arc guide groove (102) close to the workpiece is lower than an end of the circular arc guide groove (102) far from the workpiece, so that: When the lower end of the long connecting rod (303) is in a pressing state close to one end of the workpiece in the arc guide groove (102), the pressing plate assembly (2) protrudes from the edge of the workpiece to the outside of the bottom plate assembly (1) and reaches above the edge of the workpiece; When the lower end of the long connecting rod (303) is in a storage state at one end of the circular arc guide groove (102) away from the workpiece, the pressing plate assembly (2) is stored in the avoidance space (101).

4. The connecting rod type pressing device according to claim 3, characterized in that: When the lower end of the long connecting rod (303) is in a raised state at the middle position of the circular arc guide groove (102), the bottom surface of the pressing plate assembly (2) close to the edge of the workpiece is higher than the top surface of the bottom plate assembly (1); Wherein, during the switching process of the pressing state - raising state - storing state, the long connecting rod (303) and the short connecting rod (304) are always inclined upward towards the direction close to the workpiece; and, when the pressing plate assembly (2) is closer to the workpiece, the long connecting rod (303) and the short connecting rod (304) tend to be in a vertical state more.

5. The link type pressing device according to claim 4, characterized in that, A cylindrical limiting member (305) is provided at the lower end of the long connecting rod (303), and the cylindrical limiting member (305) passes through the arc-shaped guiding groove (102).

6. The link type pressing device according to claim 5, characterized in that, The cylindrical limiting member (305) is a limiting pin, a roller or a bearing.

7. The link-type pressing device according to claim 4, characterized in that, When the lower end of the long connecting rod (303) is at the end of the arc-shaped guiding groove (102) far from the workpiece, the top surfaces of the bottom plate assembly (1) and the pressing plate assembly (2) are flush.

8. The link type pressing device according to claim 2, wherein, The transverse driving assembly (4) includes: A transverse driving linear driving mechanism (401), and the transverse driving linear driving mechanism (401) is fixedly arranged on the bottom plate assembly (1); A driving connecting plate (402), one end of the driving connecting plate (402) is fixedly arranged at the driving end of the transverse driving linear driving mechanism (401), and a strip-shaped groove (4021) extending in the vertical direction is arranged at the other end; wherein, the pressing plate supporting plate (301) is connected with the driving connecting plate (402) through the strip-shaped groove (4021) and can move up and down.

9. A material transfer device, characterized in that, It includes a conveying device (100) in the form of a spaced double conveyor belt, a jacking mechanism located between the two conveyor belts, and a link-type pressing device (200) as described in any one of claims 1 - 8 installed on any side of the conveying device (100).

10. A method for determining the axis position of an arc-shaped guiding groove, applicable to the link-type pressing device (200) described in claim 5, characterized in that, It includes: Establish a coordinate system with the bottom plate assembly (1) as a reference; Specify the distance dimension L2 from the rotation axis of the long connecting rod (303) and the transverse moving slider (302) to the axis of the cylindrical limiting member (305); Make the link-type pressing device (200) be in the pressing state, and record the coordinate position A where the axis of the cylindrical limiting member (305) is located at this time; Make the link-type pressing device (200) be in the raising state, and record the coordinate position B where the axis of the cylindrical limiting member (305) is located at this time; Make the link-type pressing device (200) be in the storing state, and record the coordinate position C where the axis of the cylindrical limiting member (305) is located at this time; Respectively draw the perpendicular bisectors of the straight line A - B and the straight line B - C, and the axis where the intersection point Q of the two perpendicular bisectors is located is the axis of the arc-shaped guiding groove (102).

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