Connecting rod type pressing device, material transmission device and axis position determination method

Abstract

The present invention relates to the field of material transfer technology, specifically disclosing a connecting rod-type clamping device, a material transfer device, and an axis position determination method. The connecting rod-type clamping device includes a base plate assembly, a pressure plate assembly, a connecting rod assembly, and a transverse drive assembly. The transverse drive assembly is mounted on the base plate assembly, and the driving end of the transverse drive assembly is connected to the connecting rod assembly, which is used to drive the pressure plate assembly along a circular arc guide groove to compress or release a workpiece. The connecting rod-type clamping device, material transfer device, and axis position determination method provided by the present invention can effectively solve the problem of existing clamping devices encroaching on the space above the conveying device, which easily affects the conveying of large workpieces.

Description

Technical Field

[0001] The present invention relates to the technical field of material transmission, and in particular to a connecting rod type pressing device, a material transmission device and an axis position determination method. Background Art

[0002] During the PCB printing production process, a conveyor system consisting of two spaced-apart conveyor belts is typically used to transport PCB substrates. To meet specific process requirements, such as visual inspection, existing technologies typically incorporate a lifting mechanism in the gap between the two conveyor belts, coupled with a clamping device on the side of the conveyor belt. This system works as follows: After the lifting mechanism lifts the PCB substrate from the bottom of the conveyor belt, the workpiece clamps on both sides of the clamping device press down on the edges of the PCB substrate, thereby securing the PCB in place.

[0003] Existing clamping devices usually include two core components: a workpiece clamp and a linear drive mechanism. Specifically, the workpiece clamp must meet the following structural characteristics:

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

[0005] Second, the end of the workpiece pressure plate needs to extend toward the inside of the conveying device to ensure that it can cover the edge area of ​​the PCB substrate.

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

[0007] The workpiece clamp encroaches on the space above the conveyor channel, limiting the effective height of the material transfer space. This is particularly prone to mechanical interference or transport obstruction when handling tall workpieces. For example, PCB substrates are typically relatively small, so installing a clamping device on the conveyor does not affect the normal transfer of the PCB substrates. However, if, due to production line changes, the conveyor needs to be used to transport taller workpieces such as packaging cartons, the end of the workpiece clamp extends inward from the conveyor, blocking the packaging cartons and affecting their normal transport.

[0008] Therefore, it is necessary to improve the existing clamping device to solve the problem that it occupies the space above the conveying device and easily affects the conveying operation of workpieces with larger heights.

[0009] The above information disclosed in this Background section is included only for enhancement of understanding of the background of the disclosure and therefore it may contain information that does not form the prior art that is currently known to a person of ordinary skill in the art. Summary of the Invention

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

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

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

[0013] A pressure plate assembly, the pressure plate assembly being located in the avoidance space;

[0014] a connecting rod assembly, wherein the upper end of the connecting rod assembly is connected to the pressure plate assembly, and the lower end of the connecting rod assembly is movably connected to the base plate assembly along the circular arc guide groove;

[0015] A transverse drive assembly is mounted on the base plate assembly, and a driving end of the transverse drive assembly is connected to the connecting rod assembly, for:

[0016] The connecting rod assembly drives the pressing plate assembly to move along the arc guide groove toward the workpiece until the pressing plate assembly protrudes from the edge of the workpiece to the outside of the base plate assembly and reaches above the edge of the workpiece;

[0017] The connecting rod assembly drives the pressing plate assembly to move along the arc guide groove in a direction away from the workpiece until the pressing plate assembly is accommodated in the avoidance space.

[0018] Optionally, the connecting rod assembly includes:

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

[0020] A transverse sliding block, wherein the transverse sliding block is slidably arranged relative to the base plate assembly in a direction perpendicular to the feeding direction of the conveying device;

[0021] A long connecting rod, wherein the upper end of the long connecting rod is rotatably connected to the pressure plate supporting plate, the middle portion is rotatably connected to the transverse sliding block, and the lower end moves along the circular arc guide groove;

[0022] A short connecting rod, the upper end of which is rotatably connected to the pressure plate supporting plate, and the lower end of which is rotatably connected to the transverse sliding block.

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

[0024] When the lower end of the long connecting rod is in a pressing state of the arc guide groove close to one end of the workpiece, the pressure plate assembly protrudes from the edge of the workpiece to the outside of the base plate assembly and reaches above the edge of the workpiece;

[0025] When the lower end of the long connecting rod is in a storage state where the arc guide groove is away from one end of the workpiece, the pressure plate assembly is stored in the avoidance space.

[0026] Optional,

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

[0028] In which, the long connecting rod and the short connecting rod are always tilted upward in the direction of approaching the workpiece during the switching process of the clamping state-elevated state-storage state; and the closer the pressure plate assembly is to the workpiece, the more the long connecting rod and the short connecting rod tend to be vertical.

[0029] Optionally, a cylindrical limiting piece is provided at the lower end of the long connecting rod, and the cylindrical limiting piece 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 away from the workpiece, the top surfaces of the base plate assembly and the pressure plate assembly are flush.

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

[0032] Optionally, the transverse drive assembly includes:

[0033] A horizontal linear drive mechanism, wherein the horizontal linear drive mechanism is fixedly mounted on the base plate assembly;

[0034] A driving connecting plate, one end of which is fixed to the driving end of the horizontal drive linear driving mechanism, and the other end is connected with a strip groove extending in the vertical direction; wherein the pressure plate supporting plate is movably connected to the driving connecting plate along the strip groove.

[0035] On the other hand, a material transfer device is provided, comprising a conveying device with spaced double conveyor belts, a lifting mechanism located between the two conveyor belts, and any one of the above-mentioned connecting rod type pressing devices installed on the side of the conveying device.

[0036] On the other hand, a method for determining the axis position of an arc guide groove is provided, which is applicable to the connecting rod type pressing device, comprising:

[0037] Establish a coordinate system based on the base plate assembly;

[0038] Specify the distance L2 between the rotation axis of the long connecting rod and the transverse sliding block and the axis of the cylindrical stopper;

[0039] Put the connecting rod type pressing device into a pressing state, and record the coordinate position A of the axis of the cylindrical limiting member at this time;

[0040] The connecting rod type pressing device is in a raised state, and the coordinate position B of the axis of the cylindrical limiting member at this time is recorded;

[0041] The connecting rod type pressing device is placed in a retracted state, and the coordinate position C of the axis of the cylindrical limiting member is recorded at this time;

[0042] Draw the perpendicular bisector of the straight line AB and the perpendicular bisector of the straight line BC respectively, and the axis where the intersection point Q of the two perpendicular bisectors is located is the axis of the circular arc guide groove.

[0043] The beneficial effects of the present invention are: providing a connecting rod type pressing device, a material transmission device and an axis position determination method,

[0044] The arc guide groove constrains the motion trajectory of the lower end of the connecting rod assembly, converting the linear drive of the transverse drive assembly into a compound motion (lateral + vertical) of the pressure plate assembly, achieving coordinated movements of extension, compression, and retraction.

[0045] The avoidance space allows the pressure plate assembly to be completely hidden inside the bottom plate assembly in the storage state, eliminating the encroachment on the space above the conveyor device and ensuring the passage of large-sized workpieces;

[0046] The linkage between the transverse drive assembly and the connecting rod assembly enables precise position control of the pressure plate assembly through mechanical transmission, without the need for an additional vertical drive mechanism, thus saving equipment costs.

[0047] Therefore, the connecting rod type clamping device moves in a circular trajectory through the connecting rod assembly, so that the pressure plate assembly extends and presses down the workpiece during clamping, and is completely retracted when not in operation. This not only meets the clamping function requirements, but also maximizes the spatial height of the conveying channel, solving the problem of traditional clamping devices interfering with the transmission of large-size workpieces. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0049] Figure 1 A schematic structural diagram of a material conveying device provided in an embodiment;

[0050] Figure 2 A schematic cross-sectional view of the connecting rod type pressing device provided in the embodiment in a pressing state;

[0051] Figure 3 A schematic diagram of state switching of a connecting rod type pressing device provided in an embodiment;

[0052] Figure 4 A flow chart of a method for determining the axis position of an arc guide groove provided in an embodiment;

[0053] Figure 5 A schematic diagram of auxiliary lines of the method for determining the axis position of the arc guide groove provided in the embodiment.

[0054] In the picture:

[0055] 100. Conveying device; 200. Linkage type pressing device;

[0056] 1. Bottom plate assembly; 101. Avoidance space; 102. Arc guide groove;

[0057] 2. Press plate assembly;

[0058] 3. Connecting rod assembly;

[0059] 301, pressure plate supporting plate;

[0060] 302, horizontal movement slider;

[0061] 303, long connecting rod;

[0062] 304, short connecting rod;

[0063] 305, cylindrical limiter;

[0064] 4. Horizontal drive assembly; 401. Horizontal drive linear drive mechanism; 402. Drive connecting plate; 4021. Strip groove. DETAILED DESCRIPTION

[0065] Reference to "embodiments" in the present invention means that the specific features, structures, or characteristics described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the word "embodiment" in various places in the specification does not necessarily refer to the same embodiment, nor does it particularly limit its independence or relevance to other embodiments. In principle, in the present invention, as long as there are no technical contradictions or conflicts, the various technical features mentioned in the embodiments can be combined in any manner to form a corresponding implementable technical solution.

[0066] Unless otherwise defined, the technical terms used herein have the same meanings as those generally understood by those skilled in the art to which the present invention belongs. The use of 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 used to describe a logical relationship between objects, indicating that three possible relationships exist. For example, A and / or B means: A exists, B exists, and both A and B exist. Furthermore, the character " / " generally indicates that the objects are in a logical "or" relationship.

[0068] In the present invention, terms such as "first" and "second" are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship of quantity, priority or sequence between these entities or operations.

[0069] Without further restrictions, in the present invention, the words "include", "comprise", "have" or other similar expressions used in sentences are intended to cover non-exclusive inclusion. These expressions do not exclude the presence of additional elements in the process, method or product including the elements, so that the process, method or product including a series of elements may include not only those limited elements, but also other elements not explicitly listed, or also include elements inherent to such process, method or product.

[0070] Consistent with the understanding in the Examination Guidelines, in the present invention, expressions such as "greater than," "less than," and "exceed" are understood to exclude the number itself; expressions such as "above," "below," and "within" are understood to include the number itself. Furthermore, in the description of the embodiments of the present invention, "multiple" means two or more (including two), and similar expressions related to "multiple," such as "multiple groups" and "multiple times," are also understood in this manner, unless otherwise specifically defined.

[0071] In the description of the embodiments of the present invention, the space-related expressions used, such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "vertical", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or position relationship based on the orientation or position relationship shown in the specific embodiments or drawings, and are only for the convenience of describing the specific embodiments of the present invention or facilitating the reader's understanding, and do not indicate or imply that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present invention.

[0072] Unless otherwise expressly specified or limited, in the description of the embodiments of the present invention, the terms "installed", "connected", "connected", "fixed", "set", etc. used should be understood in a broad sense. For example, the "connection" can be a fixed connection, a detachable connection, or an integrated setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection between two elements or the interaction relationship between two elements. For those skilled in the art of the technology to which the present invention belongs, 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 connecting rod type clamping device, a material transfer device and an axis position determination method, which are suitable for scenarios in automated production lines where workpieces (such as PCB substrates) need to be temporarily clamped and lifted to avoid interference with the transfer of large-sized materials. The compound movement of the connecting rod enables precise clamping and complete storage of the pressure plate, while taking into account both positioning reliability and channel space release.

[0074] As in Examples 1 and 2, various implementations of the connecting rod type pressing device, the material transmission device, and the axis position determination method of the present invention will be introduced below with reference to the accompanying drawings.

[0075] Example 1

[0076] See also Figure 1 and Figure 2 This embodiment provides a material transfer device, including a conveying device 100 with two spaced conveyor belts, a lifting mechanism located between the two conveyor belts, and a connecting rod type clamping device 200 installed on the side of the conveying device 100.

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

[0078] A bottom plate assembly 1, wherein a relief space 101 is provided on the top of the bottom plate assembly 1, and an arc guide groove 102 is further provided below the relief space 101;

[0079] A pressure plate assembly 2, the pressure plate assembly 2 is located in the avoidance space 101;

[0080] a connecting rod assembly 3, wherein the upper end of the connecting rod assembly 3 is connected to the pressure plate assembly 2, and the lower end of the connecting rod assembly 3 is movably connected to the base plate assembly 1 along the circular arc guide groove 102;

[0081] The transverse drive assembly 4 is mounted on the base plate assembly 1, and the driving end of the transverse drive assembly 4 is connected to the connecting rod assembly 3. The transverse drive assembly 4 is mainly used for:

[0082] ① The connecting rod assembly 3 drives the pressure plate assembly 2 to move along the arc guide groove 102 toward the workpiece until the pressure 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;

[0083] ② The connecting rod assembly 3 drives the pressure plate assembly 2 to move along the arc guide groove 102 in a direction away from the workpiece until the pressure plate assembly 2 is stored in the avoidance space 101.

[0084] The connecting rod type pressing device 200 provided in this embodiment works as follows:

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

[0086] The pressure plate assembly 2 is completely accommodated in the avoidance space 101 of the bottom plate assembly 1. For example, the top surface of the pressure plate assembly 2 is flush with or lower than the top surface of the bottom plate assembly 1, thereby avoiding encroachment on the space above the conveying device 100.

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

[0088] (2) Pressing action trigger:

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

[0090] (3) The pressure plate assembly 2 extends and presses down:

[0091] The transverse drive assembly 4 drives the connecting rod assembly 3 to force the lower end of the connecting rod assembly 3 to slide along the arc guide groove 102 toward the direction approaching the workpiece.

[0092] Since the upper end of the connecting rod assembly 3 is connected to the pressure plate assembly 2, the arc motion trajectory of the lower end of the connecting rod will drive the pressure plate assembly 2 to move horizontally and vertically at the same time:

[0093] ① Lateral movement: The pressure plate assembly 2 moves laterally from the avoidance space 101 toward the conveying device 100 until its edge close to the workpiece protrudes from the outside of the base plate assembly 1 and covers the edge area of ​​the workpiece.

[0094] ② Vertical movement: The arc guide groove 102 of the connecting rod assembly 3 is designed to enable the pressure plate assembly 2 to first move upward to a height higher than the avoidance space 101 during the extension process to avoid interference with the base plate assembly 1 in the subsequent lateral movement, and then move downward to cooperate with the jacking mechanism to achieve compression and fixation of the workpiece.

[0095] (3) Maintaining the compacted state:

[0096] The pressing plate assembly 2 maintains a stable position through the cooperation between 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 (storage):

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

[0099] The reverse movement of the connecting rod assembly 3 drives the pressure plate assembly 2 to retreat laterally into the avoidance space 101 (first upward, then downward) until the pressure plate assembly 2 is finally stored in the avoidance space 101 again to avoid interfering with the normal transmission of subsequent workpieces.

[0100] In the above process:

[0101] The arc guide groove 102 constrains the motion trajectory of the lower end of the connecting rod assembly 3, converting the linear drive of the horizontal drive assembly 4 into a compound motion (horizontal + vertical) of the pressure plate assembly 2, thereby achieving the coordinated movement of extension, compression and retraction.

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

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

[0104] Therefore, the connecting rod type clamping device 200 moves in a circular arc trajectory through the connecting rod assembly 3, so that the pressure plate assembly 2 extends and presses down the workpiece during clamping, and is completely retracted in the non-working state, which not only meets the clamping function requirements, but also maximizes the spatial height of the conveying channel, solving the problem of traditional clamping devices interfering with the transmission of large-size workpieces.

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

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

[0107] A transverse sliding block 302 , the transverse sliding block 302 being slidably arranged relative to the base plate assembly 1 in a direction perpendicular to the feeding direction of the conveying device 100 ;

[0108] 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 portion is rotatably connected to the transverse sliding block 302, and the lower end moves along the arc guide groove 102;

[0109] 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 .

[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, the end of the circular arc guide groove 102 close to the workpiece is lower than the end of the circular arc guide groove 102 away from the workpiece, so that:

[0112] ① 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 pressure 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;

[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 pressure plate assembly 2 close to the edge of the workpiece is higher than the top surface of the base plate assembly 1;

[0114] ③ When the lower end of the long connecting rod 303 is in the storage state of the arc guide groove 102 away from the end of the workpiece, the pressure plate assembly 2 is stored in the avoidance space 101.

[0115] Among them, the long connecting rod 303 and the short connecting rod 304 are always tilted upward in the direction of approaching the workpiece during the switching process of the pressing state-elevated state-storage state; and the closer the pressure plate assembly 2 is to the workpiece, the more 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 located at the end of the arc guide groove 102 away from the workpiece, the top surfaces of the base plate assembly 1 and the pressure 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 (storage)

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

[0121] The pressing plate assembly 2 is completely accommodated 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, ensuring that there is no structural interference above the conveying channel.

[0122] (2) The compaction action starts

[0123] The horizontal driving assembly 4 drives the connecting plate 402 to move horizontally, driving the pressure plate supporting plate 301 to move toward the workpiece.

[0124] The lateral movement of the pressure plate supporting plate 301 is linked by the long connecting rod 303 and the short connecting rod 304, forcing the lateral sliding block 302 to slide synchronously.

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

[0126] (3) Implementation of composite motion trajectory

[0127] ① Horizontal extension stage:

[0128] When the lower end of the long connecting rod 303 slides along the arc groove to the lower point, the long connecting rod 303 and the short connecting rod 304 gradually tend to be vertical, so it not only drives the pressure plate assembly 2 to move horizontally, but also drives the pressure plate assembly 2 to move upward for a large distance, so that the bottom surface of the edge position of the pressure plate assembly 2 is higher than the top surface of the bottom plate assembly 1, so as to avoid interference between the pressure 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 base plate to cover the edge area of ​​the workpiece.

[0130] ②Vertical downward pressure stage:

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

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

[0133] ③ Characteristics of motion trajectory:

[0134] The arc guide groove 102 constrains the motion trajectory of the lower end of the long connecting rod 303, converting the linear drive of the transverse drive assembly 4 into a compound motion of the pressure plate assembly 2: "slight lateral extension followed by a significant lift, followed by a significant lateral extension followed by a slight downward pressure." This prevents interference between the pressure plate assembly 2 and the base plate assembly 1 while ensuring the normal extension and retraction of the pressure plate assembly 2.

[0135] (4) Reset action

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

[0137] The long connecting rod 303 and the short connecting rod 304 gradually move toward horizontality. When the pressure plate supporting plate 301 moves laterally, it first slightly lifts upward to separate from the workpiece, and then moves downward significantly to retreat to the space 101 .

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

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

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

[0141] The cross-hinging of the long connecting rod 303 and the short connecting rod 304 forms a mechanical dead point locking effect: when the lower end of the long connecting rod 303 is in the arc groove compression position, the connecting rod tends to a vertical state, forming a self-locking structure to ensure stable compression force.

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

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

[0144] The arc groove is at a low position (pressing position) close to the workpiece end, at a high position (storage position) away from the workpiece end, and the middle part is a transition area.

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

[0146] The cooperation between the cylindrical limiting member 305 and the arc groove ensures the movement accuracy and reduces the sliding friction.

[0147] ③Height compensation mechanism

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

[0149] When resetting, the pressure plate assembly 2 needs to be lifted to above the avoidance space 101 first, and then retracted horizontally to ensure the smoothness of the storage action.

[0150] ④Mechanical self-locking enhances reliability

[0151] When the pressure plate assembly 2 is in the clamping position, the long connecting rod 303 and the short connecting rod 304 are close to a vertical state, forming a mechanical dead point. Even if the transverse drive assembly 4 loses pressure accidentally, the clamping force can still be maintained.

[0152] ⑤Modular adaptability

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

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

[0155] A horizontal linear drive mechanism 401 , wherein the horizontal linear drive mechanism 401 is fixed to the base plate assembly 1 ;

[0156] The driving connecting plate 402 has one end fixed to the driving end of the horizontal drive linear driving mechanism 401, and the other end is connected with a strip groove 4021 extending in the vertical direction; wherein, the pressure plate support plate 301 is movably connected to the driving connecting plate 402 along the strip groove 4021.

[0157] After fasteners such as bolts are passed through the strip grooves 4021 and fastened to the pressure plate supporting plate 301, when the horizontal linear driving mechanism 401 drives the driving connecting plate 402 to move horizontally:

[0158] The pressure plate supporting plate 301 will move horizontally along with the driving connecting plate 402 (thus moving closer to or away from the workpiece). Synchronously, the pressure plate supporting plate 301 drives the transverse sliding block 302 to move horizontally through two connecting rods.

[0159] Because the vertical position of the traversing slider 302 remains constant, the platen support plate 301 changes height during its traversing motion due to the action of the connecting rod. Specifically, the platen support plate 301 first rises and then falls, thereby driving the platen assembly 2 to first rise and then fall. The strip groove 4021 is designed to avoid affecting the vertical movement of the platen support plate 301.

[0160] It should be noted that the driving connecting plate 402 is directly connected to the pressure plate supporting plate 301 instead of the transverse slider 302, which is conducive to improving the downward pressure torque of the pressure plate assembly 2 on the workpiece and realizing high-pressure clamping and fixing operations.

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

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

[0163] ① Space optimization design: By completely accommodating the avoidance space 101 of the bottom plate assembly 1 and the pressure plate assembly 2, the space occupation above the conveying channel is eliminated, ensuring barrier-free passage of large-sized workpieces.

[0164] ② Compound motion control: The arc guide groove 102 cooperates with the connecting rod assembly 3 to convert the linear drive of the horizontal drive assembly 4 into a "lateral extension + vertical downward pressure" compound motion of the pressure plate assembly 2, avoiding motion interference and eliminating the need for additional vertical drive.

[0165] ③ Mechanical self-locking stability: The long connecting rod 303 and the short connecting rod 304 are close to vertical in the compressed state, forming a mechanical dead point lock, ensuring that the compression force is stable and reliable to prevent accidental loosening.

[0166] ④ Modular adaptability: By adjusting the radius of the arc guide groove 102 and the stroke of the transverse slider 302, the conveying device 100 and workpiece specifications of different widths or heights can be quickly adapted.

[0167] ⑤ Precise trajectory constraint: The cylindrical limiter 305 slides along the arc guide groove 102 to accurately control the motion trajectory of the pressure plate assembly 2, avoid deviation and reduce friction loss.

[0168] ⑥ Height compensation mechanism: During the extension process, the pressure plate assembly 2 is in an elevated state (the bottom surface is higher than the top surface of the base plate) to avoid scratching the edge of the base plate, ensuring smooth movement.

[0169] ⑦ Simplified structure and low cost: The linkage design of the horizontal drive component 4 and the connecting rod component 3 replaces the traditional multi-axis drive, reducing the number of components and lowering the equipment manufacturing cost.

[0170] ⑧ Motion decoupling design: The transverse slider 302 separates the horizontal and vertical movement degrees of freedom to prevent the pressure plate support plate 301 from getting stuck during the composite movement.

[0171] ⑨ Quick reset and avoidance: When resetting, the pressure plate assembly 2 is first lifted and then retracted laterally to avoid collision with the conveying device 100 or the workpiece, ensuring continuous operation efficiency.

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

[0173] Example 2

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

[0175] It should be noted that if there is no arc guide groove, when the transverse drive assembly drives the connecting rod assembly laterally, the connecting rod assembly will not first lift up to avoid the base plate assembly and then move laterally, but will directly hit the base plate assembly laterally;

[0176] The main reason why the base plate assembly can move horizontally and upward to avoid obstacles is that the friction resistance between the arc guide groove and the cylindrical limiter hinders the horizontal movement of the lower end of the long connecting rod, causing the horizontal movement speeds of the upper and lower ends of the long connecting rod to be inconsistent. Therefore, the design of the arc guide groove is very important.

[0177] See also Figure 3-Figure 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 connecting rod type pressing device 200 and the material transmission device in Example 1.

[0178] After the axis position is determined, the width of the arc guide groove 102 can be determined based on the diameter of the cylindrical limiter 305 , thereby completing the grooving operation of the arc guide groove 102 .

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

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

[0181] S102: The pressure plate assembly 2 is made to protrude from the edge of the workpiece to the outside of the base plate assembly 1 and reach above the edge of the workpiece. In this clamping state, the installation positions of the pressure plate support plate 301 and the short connecting rod 304 are first specified, and then the installation positions of the transverse slider 302 and the short connecting rod 304 are specified. In this way, the length L1 from the rotation axis of the short connecting rod 304 and the transverse slider 302 to the rotation axis of the short connecting rod 304 and the pressure plate support plate 301 can be determined;

[0182] S103: The pressure plate assembly 2 is accommodated in the avoidance space 101. In the accommodated state, the distance between the long connecting rod 303 and the short connecting rod 304 is specified, thereby determining the installation position between the long connecting rod 303 and the transverse slider 302.

[0183] It should be noted that the specific structure of the connecting rod assembly 3 itself is not the key to this embodiment. Its manufacturing process involves multiple parameters that need to be manually specified. Therefore, according to different design requirements, connecting rod assemblies 3 with different size parameters may be obtained. This embodiment does not limit this.

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

[0185] S201: Establishing a coordinate system based on the base plate assembly 1;

[0186] S202: Specifying a distance L2 between the rotation axis of the long connecting rod 303 and the transverse sliding block 302 and the axis of the cylindrical limiting member 305;

[0187] S203: The connecting rod type pressing device 200 is placed in a pressing state, and the coordinate position A of the axis of the cylindrical limiting member 305 is recorded at this time;

[0188] S204: The connecting rod type pressing device 200 is in a raised state, and the coordinate position B of the axis of the cylindrical limiting member 305 is recorded at this time;

[0189] S205: The connecting rod type pressing device 200 is placed in a retracted state, and the coordinate position C of the axis of the cylindrical limiting member 305 is recorded at this time;

[0190] S206 : Draw the perpendicular bisector of the straight line AB and the perpendicular bisector of the straight line BC respectively. The axis where the intersection point Q of the two perpendicular bisectors is located is the axis of the circular arc guide groove 102 .

[0191] The arc guide groove 102 manufactured according to the above method can generate a certain friction resistance between it and the cylindrical limiter 305 to hinder the lateral movement of the lower end of the long connecting rod 303, thereby making the lateral movement speeds of the upper and lower ends of the long connecting rod 303 inconsistent, thereby realizing the compound movement of the pressure plate assembly 2 in the horizontal and vertical directions without causing the connecting rod assembly 3 to get stuck.

[0192] On the basis of Example 1, for the features not explained in this example, the explanation in Example 1 shall be adopted and no further details will be given here.

[0193] Finally, it should be noted that although the above embodiments have been described in the specification and drawings of this application, this does not limit the scope of patent protection of this application. All technical solutions generated by replacing or modifying equivalent structures or equivalent processes based on the essential concepts of this application using the contents recorded in the specification and drawings of this application, as well as directly or indirectly implementing the technical solutions of the above embodiments in other related technical fields, are included in the scope of patent protection of this application.

Claims

1. A connecting rod type pressing device, used for cooperating with a lifting mechanism to press a workpiece on a conveying device (100), 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), wherein the upper end of the connecting rod assembly (3) is connected to the pressure plate assembly (2), and the lower end is 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 pressure plate assembly (2) to move along the arc guide groove (102) toward the workpiece until the pressure 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; and driving the pressing plate assembly (2) to move along the circular arc guide groove (102) in a direction away from the workpiece through the connecting rod assembly (3) until the pressing plate assembly (2) is accommodated in the avoidance space (101); 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 base 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 portion 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); 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) away 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 pressure 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; When the lower end of the long connecting rod (303) is in a storage state at one end of the arc guide groove (102) away from the workpiece, the pressure plate assembly (2) is stored in the avoidance space (101); 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 pressure plate assembly (2) close to the edge of the workpiece is higher than the top surface of the bottom plate assembly (1); The long connecting rod (303) and the short connecting rod (304) are always arranged to be tilted upward in the direction of approaching the workpiece during the switching process between the pressing state-the raising state-the storing state; and the closer the pressure plate assembly (2) is to the workpiece, the closer the long connecting rod (303) and the short connecting rod (304) tend to be in a vertical state. A horizontal linear drive mechanism (401), wherein the horizontal linear drive mechanism (401) is fixedly mounted on the base plate assembly (1); A driving connecting plate (402), one end of which is fixed to the driving end of the horizontal linear driving mechanism (401), and the other end of which is connected to a strip groove (4021) extending in a vertical direction; wherein the pressure plate supporting plate (301) is movably connected to the driving connecting plate (402) in an up-and-down manner along the strip groove (4021).

2. The connecting rod type pressing device according to claim 1, characterized in that: A cylindrical stopper (305) is provided at the lower end of the long connecting rod (303), and the cylindrical stopper (305) passes through the circular arc guide groove (102).

3. The connecting rod type pressing device according to claim 2, characterized in that: The cylindrical limiting member (305) is a limiting latch, a roller or a bearing.

4. The connecting rod type pressing device according to claim 1, characterized in that: When the lower end of the long connecting rod (303) is located at the end of the circular arc guide groove (102) away from the workpiece, the top surfaces of the base plate assembly (1) and the pressure plate assembly (2) are flush.

5. A material transmission device, characterized in that: The invention comprises a conveying device (100) of spaced double conveyor belt type, a lifting mechanism located between the two conveyor belts, and a connecting rod type pressing device (200) as described in any one of claims 1 to 4 installed on the side of the conveying device (100).

6. A method for determining the axis position of an arc guide groove, applicable to the connecting rod type pressing device (200) according to claim 2, characterized in that: include: Establishing a coordinate system with the base plate assembly (1) as a reference; Specifying a distance dimension L2 from the rotation axis of the long connecting rod (303) and the transverse sliding block (302) to the axis of the cylindrical limiting member (305); The connecting rod type pressing device (200) is placed in a pressing state, and the coordinate position A of the axis of the cylindrical limiting member (305) is recorded at this time; The connecting rod type pressing device (200) is placed in a raised state, and the coordinate position B of the axis of the cylindrical limiting member (305) is recorded at this time; The connecting rod type pressing device (200) is placed in a retracted state, and the coordinate position C of the axis of the cylindrical limiting member (305) is recorded at this time; Draw the perpendicular bisector of the straight line AB and the perpendicular bisector of the straight line BC respectively, and the axis where the intersection point Q of the two perpendicular bisectors is located is the axis of the circular arc guide groove (102).

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