Multidirectional synchronous positioning jig

Abstract

The utility model discloses a multidirectional synchronous positioning jig which comprises a bottom plate and a top plate arranged above the bottom plate at intervals, and further comprises a multidirectional positioning structure and a plurality of positioning mechanisms arranged on the bottom plate, and the positioning mechanisms are distributed in a central symmetry mode relative to the bottom plate. The positioning mechanism is provided with positioning parts extending to the position above the top plate, a variable positioning space is defined by the inner sides of the multiple positioning parts, and a workpiece is placed in the positioning space. And the synchronous driving structure comprises linkage mechanisms detachably hinged to the positioning mechanisms and a driving mechanism for driving at least one linkage mechanism to drive the corresponding positioning mechanisms to move towards or away from each other relative to the center of the top plate so as to position the workpieces placed in the positioning space. Compared with the prior art, the control system is simple, the control synchronism is high, the occupied space is small, and different positioning requirements of workpieces can be met.

Description

Technical Field

[0001] The utility model relates to the technical field of workpiece positioning, in particular to a multi-directional synchronous positioning fixture. Background Art

[0002] In the field of industrial automation and mechanical manufacturing, precise positioning of products is one of the key links to achieve efficient and accurate production. Traditionally, in order to achieve multi-dimensional positioning of products, such as center positioning, single-side positioning and more complex single-angle and double-side positioning, it is often necessary to deploy multiple independent cylinders. Each cylinder controls the movement of the push plate in one direction to coordinate the fixation and positioning of the product.

[0003] Although the existing multi-cylinder independent control solution can meet the positioning needs to a certain extent, it has many limitations: first, multiple cylinders and their supporting control components (such as solenoid valves, sensors, etc.) increase the complexity and maintenance difficulty of the entire positioning system, and also increase the probability of failure; second, due to factors such as mechanical gaps and control delays between cylinders, it is difficult to achieve fully synchronized motion control, which in turn affects the positioning accuracy and stability; third, the arrangement of multiple cylinders requires a large space, which is particularly unfavorable in a compact production environment, limiting the miniaturization and integrated design of the equipment. Utility Model Content

[0004] In view of this, the purpose of the present invention is to provide a multi-directional synchronous positioning fixture to solve the problems of high control system complexity, poor control synchronization and large space occupation in the prior art.

[0005] In order to achieve the above-mentioned object, the technical solution of the utility model provides a multi-directional synchronous positioning fixture, comprising a bottom plate and a top plate spaced above the bottom plate, and also comprising:

[0006] A multi-directional positioning structure, comprising a plurality of positioning mechanisms disposed on the bottom plate, the plurality of positioning mechanisms being centrally symmetrically distributed relative to the bottom plate, the positioning mechanisms having a positioning portion extending above the top plate, the inner sides of the plurality of positioning portions enclosing a variable positioning space, the workpiece being placed in the positioning space; and

[0007] The synchronous driving structure includes a linkage mechanism detachably hinged to the positioning mechanism and a driving mechanism for driving at least one of the linkage mechanisms to drive the corresponding positioning mechanism to move closer to or away from the center of the top plate, so as to position the workpiece placed in the positioning space.

[0008] Furthermore, the top plate is arranged above the bottom plate along the first direction, and a guide groove is provided through the top plate at a position corresponding to the positioning mechanism;

[0009] The positioning mechanism includes a guide assembly arranged on the bottom plate and a positioning block arranged on the guide assembly. The positioning block is detachably hinged to the linkage mechanism. The top of the positioning block extends to the top of the top plate through the guide groove to form the positioning portion. When the driving mechanism drives the linkage mechanism to operate, the linkage mechanism rotates relative to the positioning block so that the positioning block moves toward the center of the top plate to move closer to each other or moves away from each other under the guidance of the guide assembly.

[0010] Furthermore, the guide assembly includes a guide rail fixed on the base plate and a slider slidably arranged on the guide rail, the guide rail is defined as a linear guide rail arranged along a second direction, the slider is slidably arranged on the guide rail along the second direction, the second direction is defined as a ray direction with the center of the base plate as an endpoint and the second direction is perpendicular to the first direction, and the positioning block is fixed on the slider.

[0011] Furthermore, the positioning block includes a main body portion arranged on the slider and an extension portion extending from the main body portion to the guide groove, the lower surface of the main body portion is concavely provided with a groove, the slider is embedded in the groove, and the positioning portion is formed at one end of the extension portion away from the main body portion and extends upward beyond the upper surface of the top plate.

[0012] Furthermore, the guide groove is defined as a strip groove, and the length direction of the guide groove is parallel to the guiding direction of the guide rail, and the dimension of the extension portion in the length direction of the guide groove is smaller than the length of the guide groove, so that when the slider slides and drives the positioning block to move, the extension portion moves along the length direction of the guide groove.

[0013] Furthermore, the upper surface of the main body is spaced apart from the lower surface of the top plate.

[0014] Furthermore, the driving mechanism includes a driving cylinder mounted on the lower surface of the base plate and a driving plate fixed on the output shaft of the driving cylinder, the driving cylinder drives the driving plate to move in a first direction, and one end of the linkage mechanism away from the positioning mechanism is detachably hinged on the driving plate.

[0015] Furthermore, the linkage mechanism includes a first connecting rod detachably hinged to the positioning block, a second connecting rod rotatably arranged at one end of the first connecting rod away from the positioning block through a rotating shaft, and a third connecting rod rotatably arranged at one end of the second connecting rod away from the first connecting rod through a rotating shaft, the end of the third connecting rod away from the second connecting rod is detachably hinged to the driving plate, and the second connecting rod is also rotatably connected to the edge of the base plate.

[0016] Furthermore, a first rotating bracket is provided on the positioning block, and an end of the first connecting rod away from the second connecting rod is detachably hinged to the first rotating bracket; a second rotating bracket is protruding outwardly from the edge of the base plate, and the second connecting rod is rotatably connected to the second rotating bracket at a position between the two ends via a rotating shaft; a third rotating bracket is protruding outwardly from the edge of the driving plate, and an end of the third connecting rod away from the second connecting rod is detachably hinged to the third bracket.

[0017] Furthermore, it also includes a support mechanism arranged between the bottom plate and the top plate, and the support mechanism includes a plurality of support columns supported between the upper surface of the bottom plate and the lower surface of the top plate.

[0018] The multi-directional synchronous positioning fixture of the utility model adopts a driving cylinder to drive multiple linkage mechanisms to act synchronously and to make the positioning blocks move synchronously to position the workpiece. The single power source can not only simplify the power transmission system of the entire fixture, but also reduce energy loss and failure points, so that the fixture can respond quickly when it needs to be positioned quickly and accurately, thereby improving the flexibility and reliability of the overall system. At the same time, the linkage mechanism and the positioning block and / or the driving plate are connected in a detachable manner, which can give the entire fixture extremely high flexibility, so that all positioning blocks can work synchronously to provide powerful thrust and multi-directional positioning capabilities, and can also be split and used independently according to positioning needs. Whether it is large-area positioning that requires comprehensive coverage or precise positioning for specific edges or corners, it can be easily handled and supports the function of single-side or double-side single-angle positioning, further meeting the specific needs in different application scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the multi-directional synchronous positioning fixture of the utility model.

[0020] Figure 2 for Figure 1 Exploded diagram.

[0021] Figure 3 A schematic diagram of the structure of the base plate.

[0022] Figure 4 This is a schematic diagram of the structure of the top plate.

[0023] Figure 5 It is a schematic diagram of the assembly of the multi-directional positioning structure and the base plate.

[0024] Figure 6 This is a schematic diagram of the structure of the positioning block.

[0025] Figure 7 It is a schematic diagram of the assembly of the multi-directional positioning mechanism and the synchronous driving mechanism.

[0026] Figure 8 This is an exploded view of the synchronous drive mechanism.

[0027] The accompanying drawings in the specification are numeraled as follows:

[0028] Bottom plate 100, second rotating bracket 110, second supporting arm 111, second gap 112, second rotating hole 113;

[0029] Top plate 200, guide groove 210;

[0030] The multi-directional positioning structure 300, the guide assembly 310, the guide rail 311, the slider 312, the positioning block 320, the main body 321, the extension portion 322, the positioning portion 323, the groove 324, the first rotating bracket 325, the first supporting arm 3251, the first gap 3252, and the first rotating hole 3253;

[0031] Synchronous drive structure 400, drive mechanism 410, drive cylinder 411, drive plate 412, third rotating bracket 4121, third rotating hole 4122, linkage mechanism 420, first connecting rod 421, first matching hole 4211, second connecting rod 422, second matching hole 4221, third connecting rod 423, third matching hole 4231;

[0032] Support mechanism 500 and support column 510 . DETAILED DESCRIPTION

[0033] The following is further described in detail through specific implementation methods:

[0034] Example

[0035] Please refer to Figure 1 and Figure 2 The multi-directional synchronous positioning fixture of the utility model includes a bottom plate 100, a top plate 200 arranged above the bottom plate 100, a multi-directional positioning structure 300 arranged between the bottom plate 100 and the top plate 200, and a synchronous driving structure 400 arranged at the bottom of the bottom plate 100 and driving the multi-directional positioning structure 300 to position the workpiece. A variable positioning space is formed in the multi-directional positioning structure 300 corresponding to the upper surface of the top plate 200 to accommodate the positioning of workpieces of different sizes and facilitate the placement of workpieces. During positioning, the workpiece is placed in the positioning space on the upper surface of the top plate 200, and the multi-directional positioning structure 300 is driven by the synchronous driving structure 400 to position the workpiece from a single side, a double-sided single angle or a multi-sided center to meet different positioning scenarios.

[0036] The multi-directional positioning structure 300 includes a plurality of positioning mechanisms arranged on the base plate 100, and the plurality of positioning mechanisms are distributed symmetrically with respect to the base plate 100. The top of the positioning mechanism extends upward from the top plate 200, and the inner side of the protruding end of the positioning mechanism encloses a variable positioning space, and can contact and position the workpiece in a timely manner under the drive of the synchronous drive structure 400. The synchronous drive structure 400 includes a linkage mechanism 420 that is detachably hinged to the positioning mechanism and a drive mechanism 410 that drives at least one linkage mechanism 420 to drive the corresponding positioning mechanism to move closer to or away from the center of the top plate 200. In this way, the linkage mechanism 420 can be connected and disassembled with the positioning mechanism according to the positioning requirements of the workpiece (such as single-sided, double-sided and multi-sided, etc.), and then the linkage mechanism 420 can be controlled to drive the corresponding positioning mechanism to move synchronously when it moves, while the uncontrolled positioning mechanism (i.e., the positioning mechanism not connected to the linkage mechanism 420) remains fixed, so that when each controlled positioning mechanism moves closer to the center, the positioning space is compressed inward to achieve the positioning of the workpiece, or when it moves away from the center, the positioning space is expanded outward to release the workpiece that has been positioned. In this embodiment, the drive mechanism 410 is used to synchronously drive the linkage mechanism 420 and synchronously drive the positioning mechanism connected thereto to move, so as to ensure the consistency of the actions of the controlled positioning mechanism, thereby achieving rapid and accurate positioning of the workpiece.

[0037] In a specific example, in most cases, the workpiece is usually a four-sided structure or can be approximately a quadrilateral structure or accurate positioning can be achieved with at most four sides. Therefore, this embodiment is described by taking the setting of four positioning mechanisms as an example.

[0038] Four positioning mechanisms are arranged on the bottom plate 100. The four positioning mechanisms are symmetrically distributed around the center of the bottom plate 100. Figure 1 In the viewing direction, the two relative positioning mechanisms are arranged oppositely along the X-axis direction and the Y-axis direction respectively, the driving mechanism 410 is arranged on the lower surface of the bottom plate 100, and a linkage mechanism 420 corresponding to the positioning mechanism is arranged correspondingly. When the four positioning mechanisms are connected to the four linkage mechanisms 420, under the drive of the driving mechanism 410, the linkage mechanism 420 can drive the four positioning mechanisms to move synchronously, so that the positioning mechanism can compress the positioning space toward the center in the X-axis direction and the Y-axis direction at the same time to achieve the center positioning (or four-side positioning) of the workpiece; when any one of the positioning mechanisms is not connected to its corresponding linkage mechanism 420, at this time, the positioning mechanism is an uncontrolled positioning mechanism, its position is always fixed and always keeps in contact with the workpiece, under the drive of the driving mechanism 410, the other three controlled positioning mechanisms compress the positioning space under the uncontrolled positioning mechanism in the corresponding X-axis direction and Y-axis direction to achieve the three-side positioning of the workpiece, and similarly, the single-side, double-side and other positioning functions of different workpieces can be realized according to the positioning requirements.

[0039] Please refer to Figure 3 The bottom plate 100 is roughly rectangular in structure, and a positioning mechanism is disposed on each of the four sides of the bottom plate 100. A second rotating bracket 110 is protruded outward from the edge (i.e., the four sides) of the bottom plate 100. The second rotating bracket 110 is disposed correspondingly to the linkage mechanism 420 and the positioning mechanism, and the corresponding position of the linkage mechanism 420 is rotatably connected to the second rotating bracket 110 via a rotating shaft. Since the linkage mechanism 420 and the positioning mechanism are hinged (the two can rotate relative to each other), when the linkage mechanism 420 rotates on the rotating bracket, the arc motion of the connection end of the linkage mechanism 420 and the positioning mechanism can be converted into the linear motion of the positioning mechanism (specifically, the slider 312 and the positioning block 320 described later), thereby compressing the positioning space or releasing the workpiece. In this embodiment, the second rotating bracket 110 is defined as a U-shaped bracket, and the second rotating bracket 110 has two second supporting arms 111 arranged opposite to each other and a second gap 112 sandwiched between the two second supporting arms 111. The two second supporting arms 111 are provided with coaxial second rotating holes 113, and the corresponding position of the linkage mechanism 420 is embedded in the second gap 112 and rotates with the second rotating hole 113 through the rotating shaft. Of course, in some other embodiments, the bottom plate 100 can also be set into other suitable shapes (such as circular, polygonal, etc.) according to space requirements, and it is sufficient that the positioning mechanism, the linkage mechanism 420 and the second rotating bracket 110 are correspondingly arranged. At the same time, the linkage mechanism 420 can also use a latch to achieve rotational cooperation with the second rotating hole 113, so that the linkage mechanism 420 on the corresponding side can be quickly disassembled when not needed to make the positioning mechanism uncontrolled; and when the second rotating bracket 110 is set, it can also be set as a structure of a single second supporting arm 111 or other structures that can achieve rotational cooperation with the linkage mechanism 420, which is not specifically limited in this embodiment.

[0040] Please refer to Figure 4 , the top plate 200 is arranged above the bottom plate 100 along the first direction (ie, the Z-axis direction) ( Figure 1), the top plate 200 is generally a rectangular structure as a whole, and a guide groove 210 is provided on the top plate 200 at the position corresponding to the positioning mechanism, so that the top of the positioning mechanism can pass through the upper surface of the top plate 200 through the guide groove 210, and the corresponding structure at the top of the positioning mechanism can move relative to the guide groove 210 to form a positioning space with a variable size for positioning the workpiece. The guide groove 210 is defined as a strip groove, and the length direction of the guide groove 210 is the ray direction with the center of the top plate 200 as the endpoint. In this embodiment, the length direction of the guide groove 210 is the X-axis direction or the Y-axis direction of the corresponding side, so that the corresponding structure at the top of the positioning mechanism can move in the X-axis direction or the Y-axis direction relative to the guide groove 210, and then compress or expand the positioning space in the X-axis direction or the Y-axis direction to achieve the positioning of the workpiece, and can adapt to workpieces of different sizes. Similarly, in some other embodiments, the top plate 200 can also be set to other suitable shapes (such as circular, polygonal, etc.) according to space requirements, and this embodiment does not make specific restrictions.

[0041] Please refer to Figure 5 The positioning mechanism includes a guide assembly 310 disposed on the bottom plate 100 and a positioning block 320 disposed on the guide assembly 310. The guide assembly 310 is disposed corresponding to the guide groove 210, and the top of the positioning block 320 extends to the top of the top plate 200 through the guide groove 210, so that under the guidance of the guide assembly 310, the positioning block 320 can move in the X-axis direction or the Y-axis direction of the corresponding side, and then the top of the positioning block 320 moves relative to the guide groove 210 to position or release the workpiece.

[0042] The guide assembly 310 includes a guide rail 311 fixed on the base plate 100 and a slider 312 slidably disposed on the guide rail 311. The guide rail 311 is defined as a linear guide rail arranged along a second direction, and the second direction is defined as a ray direction with the center of the base plate 100 as an endpoint. The second direction is perpendicular to the first direction. In this embodiment, the second direction is the X-axis direction or the Y-axis direction in the direction in which the guide rail 311 is disposed. The slider 312 is slidably disposed on the guide rail 311 along the second direction, that is, the guide rail 311 guides the slider 312 along the second direction, and the second direction is the guiding direction of the guide rail 311. The guiding direction of the guide rail 311 is parallel to the length direction of the guide groove 210. The positioning block 320 is fixed on the slider 312. In this way, when the slider 312 slides along the guide rail 311, it can drive the positioning block 320 to move synchronously, thereby causing the top of the positioning block 320 to move synchronously in the guide groove 210.

[0043] The positioning block 320 and the linkage mechanism 420 are detachably hinged. When the driving mechanism 410 drives the linkage mechanism 420 to operate, the linkage mechanism 420 rotates on the second rotating bracket 110, and the end of the linkage mechanism 420 rotates relative to the positioning block 320, thereby converting the circular motion of its end into a linear motion of the positioning block 320 and the slider 312 on the guide rail 311, so that the positioning block 320 moves toward or away from the center of the top plate 200 under the guidance of the guide assembly 310, that is, when the positioning block 320 is subjected to force and drives the slider 312 to slide along the guide rail 311, it can move toward each other in the corresponding X-axis direction or Y-axis direction and approach the center of the top plate 200 to position the workpiece, or move away from the center of the top plate 200 (i.e., move away from the center) to release the workpiece.

[0044] Please refer to Figure 6 The positioning block 320 includes a main body 321 disposed on the slider 312, an extension 322 extending from the main body 321 to the guide groove 210, and a positioning portion 323 formed at one end of the extension 322 away from the main body 321. A groove 324 is concavely provided on the lower surface of the main body 321, and the slider 312 is embedded in the groove 324 to be fixed with the positioning block 320, so as to ensure that the positioning block 320 can drive the slider 312 to slide relative to the guide rail 311 when the linkage mechanism 420 acts on the positioning block 320, so that the positioning block 320 can move smoothly and position the workpiece. The upper surface of the main body 321 is spaced from the lower surface of the top plate 200, so that the main body 321 does not contact the lower surface of the top plate 200, thereby reducing the friction force when the positioning block 320 moves, and further improving the smoothness of the movement of the positioning block 320. The dimension of the extension part 322 in the length direction of the guide groove 210 is smaller than the length of the guide groove 210, so that when the slider 312 slides relative to the guide rail 311, the positioning block 320 moves synchronously and the extension part 322 moves along the length direction of the guide groove 210. The top of the positioning mechanism extends to the top of the top plate 200 to form a positioning part 323, which extends upward beyond the upper surface of the top plate 200, and the inner side of the positioning part 323 on each positioning mechanism encloses the above-mentioned variable positioning space.

[0045] In specific implementation, the inner side surface of the positioning portion 323 can be set to a structure that imitates the workpiece to be positioned to improve the accuracy of workpiece positioning. At the same time, the imitation structure and the workpiece imitation can form a surface contact between the inner side surface of the positioning portion 323 and the corresponding side surface of the workpiece to disperse the force of the positioning portion 323 acting on the workpiece during positioning, thereby avoiding the degree of damage to the workpiece by the positioning portion 323 during positioning, and can be used in some precision workpiece positioning scenarios. In addition, the positioning block 320 can also be set in a detachable connection with the slider 312. In this way, the positioning block 320 with a corresponding imitation structure can be replaced according to the workpiece to be positioned, thereby increasing the scope of application of the fixture of this embodiment.

[0046] The positioning block 320 is provided with a first rotating bracket 325, and the first rotating bracket 325 and the corresponding end of the linkage mechanism 420 are detachably hinged, such as by using a screw or a latch to hinge the linkage mechanism 420 and the first rotating bracket 325, so that the linkage mechanism 420 and the first rotating bracket 325 can rotate relative to each other after being connected. In this way, when the corresponding end of the linkage mechanism 420 rotates, it can rotate relative to the first rotating bracket 325, and drive the positioning block 320 as a whole to slide relative to the guide rail 311 under the action of the slider 312; at the same time, the two can be disassembled and separated when not needed, so that the positioning block 320 will not move synchronously with the movement of the linkage mechanism 420, that is, the positioning mechanism is out of control. In this embodiment, the first rotating bracket 325 is defined as a U-shaped bracket, and the first rotating bracket 325 has two first supporting arms 3251 arranged opposite to each other and a first gap 3252 sandwiched between the two first supporting arms 3251. The two first supporting arms 3251 are provided with coaxial first rotating holes 3253, and the corresponding end of the linkage mechanism 420 is embedded in the first gap 3252 and rotates with the first rotating hole 3253 through the rotating shaft. Of course, in some other embodiments, when the first rotating bracket 325 is provided, it can also be provided as a structure of a single first supporting arm 3251 or other structures that can realize rotational cooperation and detachable hinge connection with the linkage mechanism 420, and this embodiment does not make specific restrictions.

[0047] Please refer to Figure 7 and Figure 8 The driving mechanism 410 includes a driving cylinder 411 mounted on the lower surface of the base plate 100 and a driving plate 412 fixed on the output shaft of the driving cylinder 411, and the linkage mechanism 420 is rotatably arranged on the driving plate 412 at one end away from the positioning mechanism. In the present embodiment, the driving cylinder 411 is defined as a linear cylinder whose output shaft can make linear motion in the first direction (Z axis) so as to drive the driving plate 412 to move in the first direction when its output shaft is extended or retracted. Of course, in some other embodiments, the driving cylinder 411 can also adopt a driving structure such as a push rod, a linear motor, a telescopic rod, etc. that can realize the movement of the driving plate 412 in the first direction. When the driving plate 412 moves in the first direction, it can rotate relative to the linkage mechanism 420, and the connection position of the linkage mechanism 420 and the second rotating bracket 110 and the connection position of the linkage mechanism 420 and the first rotating bracket 325 are linked, so as to realize synchronously driving the controlled positioning block 320 to move toward the center of the top plate 200 or move away from the center of the top plate 200 in the opposite direction.

[0048] The edge of the driving plate 412 is provided with a third rotating bracket 4121 protruding outward, and the third rotating bracket 4121 is correspondingly arranged with the linkage mechanism 420. The end of the linkage mechanism 420 away from the positioning mechanism is detachably hinged to the third rotating bracket 4121, such as by using a screw or a latch and other structures to hinge the linkage mechanism 420 and the third rotating bracket 4121, so that the linkage mechanism 420 and the third rotating bracket 4121 can rotate relative to each other after the connection. In this way, when the driving plate 412 moves in the first direction, it can drive the corresponding end of the linkage mechanism 420 to move synchronously. Since the middle part of the linkage mechanism 420 is rotatably arranged with the second rotating bracket 110 and the position is relatively fixed, the end of the linkage mechanism 420 rotates relative to the third rotating bracket 4121 while moving, thereby driving the linkage mechanism 420 to be linked with the end connected to the first rotating bracket 325, so as to drive the positioning block 320 as a whole to slide relative to the guide rail 311 under the action of the slider 312. At the same time, the detachable connection between the linkage mechanism 420 and the third rotating bracket 4121 can be disassembled and separated when not needed, so that the linkage mechanism 420 will not move synchronously with the movement of the driving plate 412, that is, the linkage mechanism 420 as a whole will not rotate relative to the first rotating bracket 325 and the second rotating bracket 110, that is, the positioning mechanism is uncontrolled, which can also meet the purpose of different side positioning requirements. In specific implementation, the linkage mechanism 420 can be detachably hinged with the first rotating bracket 325 and the third rotating bracket 4121, or the corresponding end of the linkage mechanism 420 can be detachably hinged with one of the first rotating bracket 325 or the third rotating bracket 4121 and the other is rotatably connected, so that the connection of the linkage mechanism 420 with the positioning mechanism or the driving mechanism 410 can be disconnected when necessary, thereby limiting the linkage effect of the linkage mechanism 420 and making the corresponding positioning mechanism uncontrolled.

[0049] In this embodiment, the third rotating bracket 4121 is defined as a single support arm bracket structure, and the end of the linkage mechanism 420 opposite thereto is defined as a U-shaped bracket, and the third rotating bracket 4121 is provided with a third rotating hole 4122, and the corresponding end of the linkage mechanism 420 is clamped on the third rotating bracket 4121 and is detachably hinged to the third rotating hole 4122. Of course, in some other embodiments, when the third rotating bracket 4121 is provided, it can also be provided as a U-shaped bracket with two support arms or other structures that can be detachably hinged with the linkage mechanism 420, and this embodiment does not make any specific restrictions.

[0050] The linkage mechanism 420 includes a first link 421 detachably hinged to the positioning block 320, a second link 422 rotatably arranged at one end of the first link 421 away from the positioning block 320 through a rotating shaft, and a third link 423 rotatably arranged at one end of the second link 422 away from the first link 421 through a rotating shaft, and one end of the third link 423 away from the second link 422 is detachably hinged to the driving plate 412.

[0051] One end of the first connecting rod 421 away from the second connecting rod 422 is detachably hinged to the first rotating bracket 325, and the end of the first connecting rod 421 away from the second connecting rod 422 is provided with a first matching hole 4211 corresponding to the first rotating hole 3253. When the end of the first connecting rod 421 away from the second connecting rod 422 is embedded in the first gap 3252, the first matching hole 4211 is coaxially opposite to the first rotating hole 3253, so that the first connecting rod 421 and the first rotating bracket 325 can be detachably hinged into one body by bolts or pins, so that the first connecting rod 421 can rotate relative to the first rotating bracket 325. The second connecting rod 422 is also rotatably connected to the edge of the base plate 100, and a second matching hole 4221 corresponding to the second rotating hole 113 is provided in the middle position of the second connecting rod 422 (i.e., the position between its two ends). When the middle part of the second connecting rod 422 is embedded in the second gap 112, the second matching hole 4221 is coaxially opposite to the second rotating hole 113, so that the second connecting rod 422 and the second rotating bracket 110 can be rotatably set by using a rotating axis, thereby enabling the second connecting rod 422 to rotate relative to the second rotating bracket 110. One end of the third connecting rod 423 away from the second connecting rod 422 is detachably hinged to the third rotating bracket 4121 on the driving plate 412, and the end of the third connecting rod 423 away from the second connecting rod 422 is provided with a third matching hole 4231 corresponding to the third rotating hole 4122. When the end of the third connecting rod 423 away from the second connecting rod 422 is clamped with the third rotating bracket 4121, the third matching hole 4231 is coaxially opposite to the third rotating hole 4122, so that the third connecting rod 423 and the third rotating bracket 4121 can be detachably hinged into one body by bolts or pins, so that the third connecting rod 423 can rotate relative to the third rotating bracket 4121.

[0052] In this embodiment, the rotation axes between the first link 421, the second link 422 and the third link 423 of the two linkage mechanisms 420 in the X-axis direction and the rotation axes between the corresponding first rotating bracket 325, the second rotating bracket 110 and the third rotating bracket 4121 are parallel to the Y-axis direction, while the rotation axes between the first link 421, the second link 422 and the third link 423 of the two linkage mechanisms 420 in the Y-axis direction and the rotation axes between the corresponding first rotating bracket 325, the second rotating bracket 110 and the third rotating bracket 4121 are parallel to the X-axis direction.

[0053] The first link 421, the second link 422 and the third link 423 are rotatably connected to each other to form a multi-joint linkage structure. When rotating, the direction approaching the Z axis is defined as "inward", and the direction away from the Z axis is defined as "outward".

[0054] When the output shaft of the driving cylinder 411 contracts, the driving plate 412 is driven to move upward, and the third connecting rod 423, driven by the driving plate 412, simultaneously moves upward at one end connected to the driving plate 412. At this time, the third connection is connected to the third rotating bracket 4121 at one end, and makes a linear motion in the Z-axis direction and rotates coaxially at the connection point with the third rotating bracket 4121, while the end of the third connecting rod 423 away from the driving plate 412 rotates outward; the third connecting rod 423 is rotationally connected to the second connecting rod 422, and the middle part of the second connecting rod 422 is rotationally connected to the second rotating bracket 110 and the position is relatively fixed. When the corresponding end of the third connecting rod 423 rotates outward, the second connecting rod 422 and the connecting end of the third connecting rod 423 are synchronously rotated outward, and the second connecting rod 422 and the third connecting rod 423 are synchronously rotated outward. 423 rotates coaxially at the connection through the rotating shaft, the second connecting rod 422 and the second rotating bracket 110 rotate coaxially at the connection through the rotating shaft, and the end of the second connecting rod 422 away from the third connecting rod 423 rotates inwardly; the second connecting rod 422 is rotationally connected to the first connecting rod 421, and when the corresponding end of the second connecting rod 422 rotates inwardly, the connecting end of the first connecting rod 421 and the second connecting rod 422 is driven to move inward synchronously. Since the end of the first connecting rod 421 away from the second connecting rod 422 is connected to the positioning block 320, its movement trajectory is consistent with the movement trajectory of the positioning block 320 (that is, a straight line trajectory along the X-axis direction or the Y-axis direction), and thus the positioning block 320 can be pushed inward to approach the center, so that the slider 312 slides inwardly under the action of the guide rail 311 to compress the positioning space and position the workpiece.

[0055] When the output shaft of the driving cylinder 411 extends out, it drives the driving plate 412 to move downward, and the third connecting rod 423, driven by the driving plate 412, moves downward synchronously at one end connected to the driving plate 412. At this time, the third connection is connected to the third rotating bracket 4121 at one end to make a linear motion in the Z-axis direction and rotate coaxially with the third rotating bracket 4121 at the connection, while the end of the third connecting rod 423 away from the driving plate 412 rotates inward; the third connecting rod 423 is rotationally connected to the second connecting rod 422, and the middle part of the second connecting rod 422 is rotationally connected to the second rotating bracket 110 and the position is relatively fixed. When the corresponding end of the third connecting rod 423 rotates inward, the second connecting rod 422 and the connecting end of the third connecting rod 423 are driven to rotate inward synchronously, and the second connecting rod 422 and the third connecting rod 423 are 423 rotates coaxially at the connection through the rotating shaft, the second connecting rod 422 and the second rotating bracket 110 rotate coaxially at the connection through the rotating shaft, and the second connecting rod 422 rotates outward at one end away from the third connecting rod 423; the second connecting rod 422 is rotationally connected to the first connecting rod 421, and when the corresponding end of the second connecting rod 422 rotates outward, the connecting end of the first connecting rod 421 and the second connecting rod 422 is driven to move outward synchronously. Since the end of the first connecting rod 421 away from the second connecting rod 422 is connected to the positioning block 320, its movement trajectory is consistent with the movement trajectory of the positioning block 320 (i.e., a straight line trajectory along the X-axis direction or the Y-axis direction), and thus the positioning block 320 can be pulled outward to move away from the center, so that the slider 312 slides outward under the action of the guide rail 311 to expand the positioning space and release the workpiece.

[0056] In the above-mentioned action process, although the action of a single connecting rod is described separately, it should be known that once the driving cylinder 411 starts to move, the first connecting rod 421, the second connecting rod 422 and the third connecting rod 423 will move synchronously and there is no sequence of actions, thus forming a linkage structure to drive the positioning block 320 to move.

[0057] Please refer to Figure 1 and Figure 2 As a preferred embodiment of the present embodiment, the positioning fixture of the present embodiment further includes a support mechanism 500 disposed between the bottom plate 100 and the top plate 200, for supporting the top plate 200 on the bottom plate 100. Specifically, the support mechanism 500 includes a plurality of support columns 510 supported between the upper surface of the bottom plate 100 and the lower surface of the top plate 200, so that the upper surface of the main body 321 and the lower surface of the top plate 200 form a gap, thereby reducing the friction force when the positioning block 320 moves, and improving the smoothness of the movement of the positioning block 320.

[0058] Please refer to Figures 1 to 6When positioning a workpiece, the utility model first connects the linkage mechanism 420 and the positioning mechanism of appropriate number and position according to the positioning requirements of the workpiece; then, the output shaft of the driving cylinder 411 is controlled to extend, so that the linkage mechanism 420 drives the positioning block 320 to move outward, and the positioning space is expanded to a suitable position. The suitable position here is limited to the gap that can place the workpiece, and then the workpiece is placed on the upper surface of the top plate 200 and at a position corresponding to the positioning space; then, the output shaft of the driving cylinder 411 is controlled to retract, so that the linkage mechanism 420 drives the positioning block 320 to move outward, and the positioning space is expanded to a suitable position. The suitable position here is limited to the gap that can place the workpiece, and then the workpiece is placed on the upper side surface of the top plate 200 and at a position corresponding to the positioning space; then, the output shaft of the driving cylinder 411 is controlled to retract, so that the linkage mechanism 4 20 drives the positioning block 320 to move inward, compressing the positioning space until the inner side of each positioning part 323 contacts the workpiece to position the workpiece to a suitable position; finally, the output shaft of the driving cylinder 411 is controlled to extend again, so that the linkage mechanism 420 drives the positioning block 320 to move outward, expanding the positioning space to a suitable position, where the suitable position is limited to the robot or manipulator in the subsequent process having enough space to pick up the workpiece; at this point, the positioning of the workpiece is completed to facilitate the robot or manipulator in the ditching process to accurately pick up the workpiece at the specified position. When positioning, this embodiment can determine the action stroke of the output shaft of the driving mechanism 410 by means of sensors or setting positioning parameters, so as to prevent the positioning block 320 from excessively moving and causing the workpiece to be squeezed or damaged, etc. This method can be implemented using existing technology and will not be described in detail here.

[0059] The multi-directional synchronous positioning fixture of the utility model adopts a driving cylinder 411 to drive multiple linkage mechanisms 420 to act synchronously and make the positioning block 320 move synchronously to position the workpiece. The single power source can not only simplify the power transmission system of the entire fixture, but also reduce energy loss and fault points, so that the fixture can respond quickly when it needs to be positioned quickly and accurately, thereby improving the flexibility and reliability of the overall system. At the same time, the linkage mechanism 420 and the positioning block 320 and / or the driving plate 412 are connected in a detachable manner, which can give the entire fixture extremely high flexibility. All positioning blocks 320 can work synchronously to provide powerful thrust and multi-directional positioning capabilities, and can also be split and used independently according to positioning needs. Whether it is large-area positioning that requires full coverage or precise positioning for specific edges or corners, it can be easily handled, supporting the function of single-side or double-side single-angle positioning, further meeting the specific needs in different application scenarios.

[0060] In addition, the positioning block 320 and the slider 312 are connected in a detachable manner, which reserves the possibility of adding auxiliary structures to the fixture, so that various auxiliary devices (such as the positioning block 320 that imitates the workpiece) can be flexibly configured according to actual work needs to achieve special-shaped positioning. This not only improves the versatility and adaptability, but also provides users with customized solutions to meet the diverse and personalized positioning needs on the market, and expands the scope of use of production lines that process complex-shaped workpieces or require special positioning methods.

Claims

1. A multi-directional synchronous positioning fixture, comprising a bottom plate and a top plate spaced above the bottom plate, characterized in that: Also includes: A multi-directional positioning structure, comprising a plurality of positioning mechanisms disposed on the bottom plate, the plurality of positioning mechanisms being centrally symmetrically distributed relative to the bottom plate, the positioning mechanisms having a positioning portion extending above the top plate, the inner sides of the plurality of positioning portions enclosing a variable positioning space, the workpiece being placed in the positioning space; and The synchronous driving structure includes a linkage mechanism detachably hinged to the positioning mechanism and a driving mechanism that drives at least one of the linkage mechanisms to drive the corresponding positioning mechanism to move closer to or away from the center of the top plate to position the workpiece placed in the positioning space.

2. The multi-directional synchronous positioning fixture according to claim 1, characterized in that: The top plate is arranged above the bottom plate along the first direction, and a guide groove is provided through the top plate at a position corresponding to the positioning mechanism; The positioning mechanism includes a guide assembly arranged on the bottom plate and a positioning block arranged on the guide assembly. The positioning block is detachably hinged to the linkage mechanism. The top of the positioning block extends to the top of the top plate through the guide groove to form the positioning portion. When the driving mechanism drives the linkage mechanism to operate, the linkage mechanism rotates relative to the positioning block so that the positioning block moves toward the center of the top plate to move closer to each other or moves away from each other under the guidance of the guide assembly.

3. The multi-directional synchronous positioning fixture according to claim 2, characterized in that: The guide assembly includes a guide rail fixed on the base plate and a slider slidably arranged on the guide rail, the guide rail is defined as a linear guide rail arranged along a second direction, the slider is slidably arranged on the guide rail along the second direction, the second direction is defined as a ray direction with the center of the base plate as an endpoint and the second direction is perpendicular to the first direction, and the positioning block is fixed on the slider.

4. The multi-directional synchronous positioning fixture according to claim 3, characterized in that: The positioning block includes a main body portion arranged on the slider and an extension portion extending from the main body portion to the guide groove, the lower surface of the main body portion is concavely provided with a groove, the slider is embedded in the groove, and the positioning portion is formed at one end of the extension portion away from the main body portion and extends upward beyond the upper surface of the top plate.

5. The multi-directional synchronous positioning fixture according to claim 4, characterized in that: The guide groove is defined as a strip groove, and the length direction of the guide groove is parallel to the guiding direction of the guide rail. The dimension of the extension portion in the length direction of the guide groove is smaller than the length of the guide groove, so that when the slider slides and drives the positioning block to move, the extension portion moves along the length direction of the guide groove.

6. The multi-directional synchronous positioning fixture according to claim 4, characterized in that: The upper surface of the main body is spaced apart from the lower surface of the top plate.

7. The multi-directional synchronous positioning fixture according to claim 2, characterized in that: The driving mechanism includes a driving cylinder mounted on the lower surface of the base plate and a driving plate fixed on the output shaft of the driving cylinder. The driving cylinder drives the driving plate to move in a first direction. One end of the linkage mechanism away from the positioning mechanism is detachably hinged on the driving plate.

8. The multi-directional synchronous positioning fixture according to claim 7, characterized in that: The linkage mechanism includes a first link detachably hinged to the positioning block, a second link rotatably arranged at one end of the first link away from the positioning block via a rotating shaft, and a third link rotatably arranged at one end of the second link away from the first link via a rotating shaft, an end of the third link away from the second link detachably hinged to the driving plate, and the second link is also rotatably connected to the edge of the base plate.

9. The multi-directional synchronous positioning fixture according to claim 8, characterized in that: A first rotating bracket is provided on the positioning block, and an end of the first connecting rod away from the second connecting rod is detachably hinged to the first rotating bracket; a second rotating bracket is protruding outward from the edge of the base plate, and the second connecting rod is rotatably connected to the second rotating bracket at a position between the two ends through a rotating shaft; a third rotating bracket is protruding outward from the edge of the driving plate, and an end of the third connecting rod away from the second connecting rod is detachably hinged to the third rotating bracket.

10. The multi-directional synchronous positioning fixture according to claim 1, characterized in that: It also includes a support mechanism disposed between the bottom plate and the top plate, wherein the support mechanism includes a plurality of support columns supported between the upper surface of the bottom plate and the lower surface of the top plate.

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