Four-coordinate synchronous positioning mechanism

Abstract

The utility model relates to the technical field of positioning measurement, and discloses a four-coordinate synchronous positioning mechanism. The four-coordinate synchronous positioning mechanism comprises a bottom plate platform and a positioning jig erected on the bottom plate platform. The X axis and the Y axis of the bottom plate platform are each provided with two sets of oppositely-arranged sliding assemblies. An L-shaped moving frame is mounted at the moving end of the sliding assembly, and a positioning block is horizontally mounted at the top end of the L-shaped moving frame; a cam disc is rotatably installed in the center of the bottom plate platform, four round-head long holes are formed in the cam disc, and the L-shaped moving frame is connected to the round-head long holes in a driving mode. A driving air cylinder is further installed on the bottom plate platform, and the telescopic end of the driving air cylinder is connected to one L-shaped moving frame. According to the four-coordinate synchronous positioning mechanism, the problems that in the positioning process of a traditional X-axis and Y-axis double-coordinate positioning mechanism, edge breakage and scratching of a workpiece are caused, and positioning is inaccurate are solved; and meanwhile, the circular workpiece can be accurately positioned.

Description

TECHNICAL FIELD

[0001] The utility model relates to positioning measurement technical field, concretely is a four coordinate synchronous positioning mechanism. BACKGROUND

[0002] Positioning mechanism is very extensive in mechanical equipment application, and the main role is to determine and maintain the position of parts or workpieces, ensure the accurate and stable positioning of workpieces in the running process of mechanical equipment, so as to achieve the expected function and performance.In the automation equipment, positioning mechanism is responsible for quickly and accurately placing workpieces on the equipment, through the cooperation of clamps and positioning pieces, to ensure that the workpieces do not shift during processing or detection.For example, in the 3C industry, the glass panel of mobile phone glass or other electronic products needs to be detected after production and processing, and the positioning mechanism is needed to accurately position the glass so that the measuring equipment can accurately and effectively detect.

[0003] However, the existing positioning mechanism mostly pushes the workpiece in X and Y directions to position the workpiece on the fixture;However, when the workpiece cannot be pushed to the position in X and Y directions at the same time, one direction of the workpiece will be in place, and the other direction will not be in place, the pressure of the in-place direction will increase, so that the friction of the direction will increase, when the pushing force of the other direction is less than the friction of the side, the workpiece will be stuck and cannot be pushed to the position;If the pushing force of the positioning mechanism is greater than the friction, it is easy to cause the problems of edge collapse, scratching and inaccurate positioning of the workpiece, which ultimately leads to the reduction of the yield rate of the workpiece;In particular, some circular workpieces cannot be positioned by the conventional X and Y double coordinate positioning mechanism.

[0004] Therefore, there is an urgent need for a four coordinate synchronous positioning mechanism to solve the above problems. INVENTION CONTENTS

[0005] Based on the above, the purpose of the utility model is to provide a four coordinate synchronous positioning mechanism to solve the problems of the X and Y double coordinate positioning mechanism in the prior art, which is easy to cause edge collapse, scratching and inaccurate positioning of the workpiece, ultimately leading to low yield rate of the workpiece and unable to position the circular workpiece.

[0006] In order to solve the above technical problems, the utility model adopts the following technical scheme:

[0007] The four coordinate synchronous positioning mechanism provided by the utility model comprises a bottom plate platform, two groups of opposite sliding assemblies are respectively installed on the X axis and Y axis of the bottom plate platform;The moving end of the sliding assembly is provided with an "L" shaped moving frame, and the top end of the "L" shaped moving frame is provided with a positioning block in a horizontal manner;The positioning fixture is arranged above the bottom plate platform, and the positioning fixture is located below the plurality of positioning blocks;

[0008] A cam disc rotatably mounted at the center of the base platform, the cam disc being provided with four round head long holes, each two of the round head long holes being arranged at 90 degrees; the cam disc being drivenly connected to the "L"-shaped moving frame through the round head long holes;

[0009] A driving air cylinder mounted on the base platform, the driving air cylinder being connected to one of the "L"-shaped moving frames at the telescopic end thereof to drive the cam disc to rotate, thereby driving the plurality of "L"-shaped moving frames connected to the cam disc to move synchronously.

[0010] As an optional technical scheme of the four-coordinate synchronous positioning mechanism, the sliding assembly comprises a sliding rail mounted on the base platform and a sliding block slidingly arranged on the sliding rail, and the "L"-shaped moving frame is mounted on the sliding block.

[0011] As an optional technical scheme of the four-coordinate synchronous positioning mechanism, the "L"-shaped moving frame comprises a base and a longitudinal support plate, the base being mounted on the sliding block, and the longitudinal support plate being vertically mounted at the end of the base away from the cam disc; and the positioning block being mounted at the top end of the longitudinal support plate.

[0012] As an optional technical scheme of the four-coordinate synchronous positioning mechanism, the top end of the longitudinal support plate is provided with a recess, the positioning block is provided with an adjusting hole, and the positioning block is adjustably mounted in the recess through the adjusting hole.

[0013] As an optional technical scheme of the four-coordinate synchronous positioning mechanism, a fixed shaft is vertically mounted at the end of the base away from the longitudinal support plate, a first bearing is mounted at the upper end of the fixed shaft, and the first bearing is slidingly arranged in the round head long hole.

[0014] As an optional technical scheme of the four-coordinate synchronous positioning mechanism, the base of one of the "L"-shaped moving frames is provided with an extension, and an elastic assembly is connected between the telescopic end of the driving air cylinder and the extension.

[0015] As an optional technical scheme of the four-coordinate synchronous positioning mechanism, the elastic assembly comprises a guide rod and a spring sleeved on the guide rod, one end of the guide rod is provided with a stop ring, the guide rod is connected to the telescopic end of the driving air cylinder through the stop ring, the extension is provided with a guide hole, and the end of the guide rod away from the stop ring is slidingly arranged in the guide hole.

[0016] As an optional technical scheme of the four-coordinate synchronous positioning mechanism, a bearing seat is mounted at the center of the base platform, a second bearing is arranged in the bearing seat, and the cam disc and the second bearing are axially connected.

[0017] As an optional technical scheme of the four-coordinate synchronous positioning mechanism, the middle part of each side of the positioning jig is provided with a clearance.

[0018] As an optional technical scheme of the four-coordinate synchronous positioning mechanism, the left and right sides of the bottom plate platform are respectively provided with connecting plates, and the positioning jig is horizontally installed at the top end of the connecting plates.

[0019] The four-coordinate synchronous positioning mechanism has the advantages that:

[0020] The utility model provides a kind of four-coordinate synchronous positioning mechanism, which comprises a bottom plate platform and a positioning jig erected on the bottom plate platform;Two groups of opposite sliding assemblies are respectively installed on the X-axis and Y-axis of the bottom plate platform;A "L"-shaped moving frame is installed on the moving end of the sliding assembly, and a positioning block is horizontally installed at the top end of the "L"-shaped moving frame;A cam disc is rotatably installed at the center of the bottom plate platform, and four round head long holes are provided on the cam disc;The "L"-shaped moving frame is drivingly connected to the round head long hole;A drive cylinder is also installed on the bottom plate platform, and the extension end of the drive cylinder is connected to one of the "L"-shaped moving frames.

[0021] In the above structure, the workpiece is placed in the middle of the positioning jig by manual or external mechanical hand, and the drive cylinder drives one of the "L"-shaped moving frames to slide on the sliding assembly, while driving the cam disc to rotate. Since every two round head long holes on the cam disc are arranged at 90 degrees, the other three "L"-shaped moving frames connected to the round head long hole are also sliding on the sliding assembly when the cam disc rotates. Therefore, one drive cylinder can drive the positioning blocks on the four "L"-shaped moving frames on the X-axis and Y-axis to move towards the center of the positioning jig simultaneously. That is, the positioning blocks of the four coordinates simultaneously push and position the circumferential edge of the workpiece, avoiding the problem of workpiece jamming or obstruction during positioning in the traditional X-axis and Y-axis double-coordinate positioning mechanism, which leads to workpiece edge collapse, scratching and inaccurate positioning. On the other hand, the four-coordinate synchronous positioning mechanism can accurately position the circular workpiece, solving the problem of incompatibility of the traditional X-axis and Y-axis double-coordinate positioning mechanism for circular workpiece positioning. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a whole structure schematic view of the four-coordinate synchronous positioning mechanism in the utility model embodiment;

[0023] Figure 2 It is an exploded view of the four-coordinate synchronous positioning mechanism in the utility model embodiment;

[0024] Figure 3 It is an exploded view of the "L"-shaped moving frame and the elastic assembly in the utility model embodiment;

[0025] Figure 4 It is a structure schematic view of the cam disc in the embodiment of the utility model.

[0026] In the drawing:

[0027] 1, base platform; 10, sliding assembly; 101, sliding rail; 102, sliding block;

[0028] 2, "L" shaped moving frame; 20, base; 201, fixed shaft; 202, first bearing; 21, longitudinal support plate; 210, groove; 22, positioning block; 220, adjusting hole; 23, extension; 230, guide hole;

[0029] 3, positioning fixture; 30, empty position; 31, workpiece; 32, connecting plate;

[0030] 4, cam disc; 40, round head long hole; 41, bearing seat; 42, second bearing;

[0031] 5, driving cylinder; 50, elastic assembly; 501, guide rod; 502, stop ring; 503, spring. DETAILED DESCRIPTION

[0032] The utility model will be further explained in detail below in combination with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the utility model, and not limited to the utility model. In addition, it should be noted that in order to facilitate the description, only the part related to the utility model is shown in the drawings, not all the structures.

[0033] In the description of the utility model, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0034] In the utility model, unless otherwise explicitly specified and limited, the "upper" or "lower" of the first feature to the second feature can include that the first and second features are in direct contact, or the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the "upper", "upper" and "upper" of the first feature to the second feature include that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The "below", "below" and "below" of the first feature to the second feature include that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0035] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0036] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more. Furthermore, the terms "first" and "second" are used merely for descriptive distinction and have no specific meaning.

[0037] like Figures 1-4 As shown, this utility model provides a four-axis synchronous positioning mechanism, which includes a base platform 1. Two sets of opposing sliding components 10 are respectively installed on the X-axis and Y-axis of the base platform 1. An "L"-shaped moving frame 2 is installed on the moving end of the sliding component 10. A positioning block 22 is horizontally installed at the top of the "L"-shaped moving frame 2. A positioning fixture 3 is installed above the base platform 1 and is located below the multiple positioning blocks 22. A cam disk 4 is rotatably installed at the center of the base platform 1. The cam disk 4 has four round-headed elongated holes 40, which are arranged at 90 degrees between each pair of round-headed elongated holes 40. The cam disk 4 is driven to the "L"-shaped moving frame 2 through the round-headed elongated holes 40. A drive cylinder 5 is installed on the base platform 1. The telescopic end of the drive cylinder 5 is connected to one of the "L"-shaped moving frames 2 to drive the cam disk 4 to rotate, thereby driving the multiple "L"-shaped moving frames 2 connected to the cam disk 4 to move synchronously.

[0038] The four-coordinate synchronous positioning mechanism provided by the utility model places workpiece 31 in the middle part of positioning fixture 3 through manual or external mechanical hand, drives cylinder 5 to drive one of "L" shaped moving frame 2 to slide on sliding assembly 10, simultaneously drives cam disc 4 to rotate, because every two round head long holes 40 on cam disc 4 are arranged at 90 degrees, therefore cam disc 4 rotates simultaneously to drive other three "L" shaped moving frames 2 connected in round head long hole 40 to slide on sliding assembly 10, thereby, through one driving cylinder 5, four "L" shaped moving frames 2 on X axis and Y axis can drive positioning block 22 to move towards the center of positioning fixture 3 simultaneously, that is, positioning block 22 on four coordinates simultaneously pushes and positions the circumferential edge of workpiece 31, avoids the problem that workpiece 31 is easily clamped or blocked in the positioning process of traditional X axis and Y axis double-coordinate positioning mechanism, and causes workpiece 31 to collapse, scratch and inaccurate positioning. On the other hand, the four-coordinate synchronous positioning mechanism can accurately position circular workpiece 31, and solves the problem that traditional X axis and Y axis double-coordinate positioning mechanism cannot be compatible with circular workpiece 31 positioning.

[0039] Specifically, as shown in Figure 1 and Figure 2 , the left and right sides of the bottom plate platform 1 are respectively vertically provided with two connecting plates 32, and the positioning fixture 3 is installed horizontally at the top end of the connecting plate 32; the two connecting plates 32 on the same side of the bottom plate platform 1 form an empty passage for the reciprocating movement of the "L" shaped moving frame 2; the four edges of the positioning fixture 3 are respectively provided with an empty position 30 at the middle position, and the four empty positions 30 enable the free ends of the four positioning blocks 22 on the four "L" shaped moving frames 2 to be closer to the center of the positioning fixture 3 under the movement of the "L" shaped moving frame 2, thereby improving the accurate positioning of the four-coordinate synchronous positioning mechanism for smaller workpieces 31 and increasing the adaptability thereof.

[0040] In the embodiment, as shown in Figure 2 , the four sliding assemblies 10 provided on the bottom plate platform 1 each include a sliding rail 101 and a sliding block 102, the four sliding rails 101 are respectively arranged on the X axis and Y axis of the bottom plate platform 1 in two groups and are spaced apart, and the four sliding rails 101 are arranged in a "cross" shape, and the sliding block 102 is slidably arranged on the sliding rail 101, and the "L" shaped moving frame 2 is installed on the top of the sliding block 102, so that the positioning block 22 on the "L" shaped moving frame 2 can relatively reciprocate in the X axis and Y axis directions through the sliding assembly 10; it should be noted that the sliding assembly 10 in the embodiment can also be composed of a lead screw and a linear bearing sleeved on the lead screw, and the "L" shaped moving frame 2 is installed on the linear bearing for movement.

[0041] Further, as shown in Figure 2 and 3As shown, the "L" shaped moving frame 2 comprises a base 20 mounted on the slider 102, and a vertical support plate 21 is vertically mounted on one end of the base 20 away from the extension 23 or the cam disc 4; one side end of the base 20 of one of the "L" shaped moving frames 2 is provided with the extension 23, and a guide hole 230 is formed in the extension 23; the top end of the vertical support plate 21 is provided with a groove 210, and the positioning block 22 is provided with an adjusting hole 220, and the positioning block 22 is adjustably mounted in the groove 210 through the adjusting hole 220, that is, the four positioning blocks 22 can adjust the spacing therebetween at the top end of the vertical support plate 21, so as to facilitate the accurate positioning of workpieces 31 of different sizes.

[0042] Specifically, the elastic assembly 50 in the embodiment comprises a guide rod 501 and a stop ring 502 mounted on one end of the guide rod 501, and the guide rod 501 is connected to the telescopic end of the driving cylinder 5 through the stop ring 502. A spring 503 is sleeved on the guide rod 501, the free end of the guide rod 501 is slidably arranged in the guide hole 230, and a snap ring is arranged at the end of the free end of the guide rod 501 to prevent the guide rod 501 from being separated from the guide hole 230. Thus, the driving cylinder 5 can drive the guide rod 501 to perform telescopic movement, when the telescopic shaft of the driving cylinder 5 is extended, the guide rod 501 slides along the guide hole 230, the spring 503 is compressed, and under the elastic force of the spring 503, the "L" shaped moving frame 2 is driven to slide on the slide rail 101 to drive the positioning block 22 to reciprocate towards the center of the positioning jig 3. The arrangement of the elastic assembly 50 forms a buffer thrust between the positioning block 22 and the workpiece 31, so as to avoid that the workpiece 31 is scratched by the instantaneous thrust of the positioning block 22, and when the workpiece 31 is not placed in place and is clamped, the elastic assembly 50 can also avoid that the workpiece 31 is damaged by the excessive thrust of the positioning block 22. Of course, the elastic assembly 50 can also be replaced by an elastic air bag.

[0043] In the embodiment, as shown in Figure 4 The circumferential edge of the cam disc 4 is provided with four protruding portions, and the round head long holes 40 are arranged on the protruding portions, respectively. Figure 3As shown, the base 20 is vertically connected with a fixed shaft 201 on the end away from the longitudinal support plate 21, the upper end of the fixed shaft 201 is installed with a first bearing 202, the first bearing 202 is slidably arranged in a circular long hole; the center of the base platform 1 is installed with a bearing seat 41, the bearing seat 41 is provided with a second bearing 42, the cam disc 4 is rotatably connected to the second bearing 42 through a rotating shaft, in order to improve the stable rotation of the cam disc 4, the bearing seat 41 is provided with at least two second bearings 42; under the above structure, when the driving cylinder 5 pushes the "L"-shaped moving frame 2 connected thereto to move, the fixed shaft 201 on the "L"-shaped moving frame 2 and the first bearing 202 slidably arranged in the circular long hole 40 will drive the cam disc 4 to rotate, and the rotation of the cam disc 4 drives the other three "L"-shaped moving frames 2 to move, that is, the structure can drive four "L"-shaped moving frames 2 through one driving cylinder 5 to drive four positioning blocks 22 to move synchronously towards the center of the positioning jig 3, thereby reducing the manufacturing cost of the four-coordinate synchronous positioning mechanism; the structure that the four positioning blocks 22 synchronously push the workpiece 31 on the positioning jig 3 prevents the workpiece 31 from being clamped, avoids the problems of edge collapse, scratching and inaccurate positioning caused by the positioning block 22 to the workpiece 31, and finally leads to low yield of the workpiece 31; at the same time, the structure can be perfectly applied to the positioning operation of the circular workpiece 31.

[0044] The above is only the preferred embodiment of the present application, and does not limit the present application in any form. Although the present application is disclosed as above, it is not intended to limit the present application. Any skilled person in the art can make some changes or modifications to the above disclosed technical content without departing from the scope of the present application, and any simple modification, equivalent change and modification of the above embodiment within the scope of the present application are all within the scope of the present application.

Claims

1. A four-coordinate synchronous positioning mechanism, characterized by, The utility model relates to a positioning jig and L-shaped moving frame synchronous movement device, including: The bottom plate platform is provided with two groups of sliding assemblies in the X axis and Y axis respectively, and the moving end of the sliding assembly is provided with an L-shaped moving frame; the top end of the L-shaped moving frame is provided with a positioning block; the upper side of the bottom plate platform is provided with a positioning jig, and the positioning jig is located below the positioning block; A cam disc is rotatably arranged at the center of the bottom plate platform, and four round head long holes are arranged on the cam disc; the cam disc is driven and connected to the L-shaped moving frame through the round head long hole; A driving cylinder is arranged on the bottom plate platform, and the telescopic end of the driving cylinder is connected to one of the L-shaped moving frames to drive the rotation of the cam disc, thereby driving the synchronous movement of the L-shaped moving frames connected to the cam disc.

2. A four-coordinates simultaneous positioning mechanism according to claim 1, characterized in that, The sliding assembly includes a slide rail mounted on the bottom plate platform and a sliding block sliding on the slide rail, and the L-shaped moving frame is arranged on the sliding block.

3. A four-coordinates simultaneous positioning mechanism according to claim 2, characterized in that, The L-shaped moving frame includes a base and a longitudinal support plate, the base is arranged on the sliding block, and the longitudinal support plate is vertically arranged at one end of the base away from the cam disc; the positioning block is arranged at the top end of the longitudinal support plate.

4. A four-coordinates simultaneous positioning mechanism according to claim 3, characterized in that, The top end of the longitudinal support plate is provided with a groove, and the positioning block is provided with an adjusting hole, and the positioning block is adjustably arranged in the groove through the adjusting hole.

5. A four-coordinates simultaneous positioning mechanism according to claim 3, characterized in that, The end of the base away from the longitudinal support plate is vertically provided with a fixed shaft, the upper end of the fixed shaft is provided with a first bearing, and the first bearing is slidingly arranged in the round head long hole.

6. A four-coordinates simultaneous positioning mechanism according to claim 5, characterized in that, One end of the base of one of the L-shaped moving frames is provided with an extension, and the telescopic end of the driving cylinder is connected to the extension through an elastic assembly.

7. A four-coordinates simultaneous positioning mechanism according to claim 6, characterized in that, The elastic assembly includes a guide rod and a spring sleeved on the guide rod, one end of the guide rod is provided with a stop ring, the guide rod is connected to the telescopic end of the driving cylinder through the stop ring, and the extension is provided with a guide hole.

8. A four-coordinates simultaneous positioning mechanism according to claim 1, characterized in that, The center of the bottom plate platform is provided with a bearing seat, the bearing seat is provided with a second bearing, and the cam disc and the second bearing are axially connected.

9. A four-coordinates simultaneous positioning mechanism according to claim 1, characterized in that, The positioning jig is provided with an empty space in the middle of the four edges.

10. A four-coordinates simultaneous positioning mechanism according to claim 1, characterized in that, The left and right sides of the bottom plate platform are respectively provided with connecting plates, and the positioning jig is horizontally arranged on the top end of the connecting plate.

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