A positioning device

Abstract

The utility model discloses a positioning device, which belongs to the technical field of automation equipment. The positioning device provided by the present invention includes a top plate, a cam, a cam follower, a motor, and four clamping components; each clamping component includes a guide rail and a connecting seat; the top plate is used to carry the product, and the cam is provided with four guide grooves, each guide groove is provided with a cam follower, the connecting seat and the cam follower are fixedly connected, the connecting seat is slidably connected with the guide rail, and a product contact piece is provided on the connecting seat, and the product contact piece passes through a through hole on the top plate and abuts against the product. The positioning device provided by the present invention uses a motor instead of multiple cylinders, and has a simple structure, small space, and low cost. Compared with multiple cylinder drives, motor drive has higher positioning accuracy and efficiency, and the debugging time is short when the product is changed. The motor can adjust the clamping force according to the current feedback value to reduce product extrusion damage.

Description

Technical Field

[0001] The utility model relates to the technical field of automation equipment, in particular to a positioning device. Background Art

[0002] In the automated production of fragile glass products such as mobile phone glass cover plates and solar silicon wafers, a positioning device is required to position the product before it is grabbed by the robot for processing so that the robot can accurately grab the product. Existing positioning devices generally use multiple cylinders as driving parts, and use multiple power sources to drive each cylinder to move toward the center of the product to achieve the clamping and positioning function.

[0003] However, the implementation of this positioning device requires multiple cylinders to control multiple power sources separately. It has a complex structure, large space, high cost, low positioning accuracy and efficiency, long debugging time when the product size changes, and difficult to control the driving force, which may cause extrusion damage to the product. Utility Model Content

[0004] The utility model aims at the above-mentioned problems of the prior art and provides a positioning device which realizes the positioning function of controlling the actions in four directions with a single power through a cam linkage structure.

[0005] The positioning device provided by the utility model comprises a bottom plate, a support column, a top plate, a cam mechanism, a driving mechanism, and a clamping mechanism;

[0006] The top plate is erected above the bottom plate through the support columns; the top plate is used to carry products;

[0007] The cam mechanism comprises a cam and four cam followers, the cam is provided with four guide grooves, and the four cam followers are respectively slidably arranged in the four guide grooves;

[0008] The driving mechanism comprises a motor, and the output end of the motor is drivingly connected to the rotating shaft of the cam;

[0009] The clamping mechanism is fixedly connected to the top plate; the clamping mechanism includes four clamping assemblies; each of the clamping assemblies includes a guide rail and a connecting seat, the connecting seat is fixedly connected to the cam follower in a one-to-one correspondence, and the connecting seat is slidably connected to the guide rail in a one-to-one correspondence; each of the connecting seats is provided with a product contact piece, and the product contact piece is used to clamp the product;

[0010] The top plate is provided with a plurality of first through holes, and the product contact member passes through the first through holes to abut against the product.

[0011] Preferably, the cam is provided with two guide grooves arranged along a first direction and two guide grooves arranged along a second direction, and the first direction and the second direction are perpendicular to each other.

[0012] Preferably, the driving mechanism also includes a first mounting plate and two second mounting plates; the motor is fixedly mounted on the lower surface of the first mounting plate; the cam is arranged above the first mounting plate; the output end of the motor is transmission-connected to the rotating shaft of the cam; the opposite ends of the upper surface of the first mounting plate are fixedly connected to the lower surface of the top plate via a second mounting plate respectively.

[0013] Preferably, the clamping mechanism further includes a third mounting plate; the upper surface of the third mounting plate is fixedly connected to the top plate; and the lower surface of the third mounting plate is fixedly connected to the guide rail.

[0014] Preferably, each of the connecting seats is provided with two product contact members, and the product contact members are elastic cylinders.

[0015] Preferably, in the clamping mechanism, two guide rails are arranged along a third direction, and the other two guide rails are arranged along a fourth direction; the third direction is perpendicular to the fourth direction.

[0016] Preferably, each of the connecting seats includes a first connecting plate and two sliders arranged on the first connecting plate, and the first connecting plate is fixedly connected to the cam follower in a one-to-one correspondence; the two sliders are respectively arranged on both sides of the guide rail and are slidably connected to the guide rail.

[0017] Preferably, each of the connecting seats also includes two second connecting plates, which are relatively arranged at one end of the first connecting plate away from the cam follower, and the two second connecting plates are arranged in parallel along the extension direction of the guide rail; the product contact piece is arranged above the second connecting plates.

[0018] Preferably, the product contact member is fixedly connected via a connecting member, and the connecting member is arranged above the second connecting plate.

[0019] Preferably, the connecting members include two short side connecting members and two long side connecting members, and the short side connecting members are mounted above the two second connecting plates; in the connecting seat where the long side connecting members are located, the top of the two second connecting plates are bridged by a third connecting plate, the long side connecting members are fixedly connected to the fourth connecting plate, and the fourth connecting plate is fixedly connected to the third connecting plate.

[0020] The utility model has the following beneficial effects: the positioning device provided by the scheme includes a top plate, a cam, a cam follower, a motor, and four clamping components; each clamping component includes a guide rail and a connecting seat; the top plate is used to carry the product, the cam is provided with four guide grooves, each guide groove is provided with a cam follower, the connecting seat and the cam follower are fixedly connected, the connecting seat is slidably connected with the guide rail, a product contact piece is provided on the connecting seat, the product contact piece passes through the through hole on the top plate and abuts against the product, the motor drives the cam to rotate, the cam follower slides in the guide groove as the cam rotates, the connecting seat slides along the guide rail driven by the cam follower, and the product contact piece approaches or moves away from the product. The positioning device provided by the scheme uses a motor instead of multiple cylinders, has a simple structure, small space, and low cost. Compared with multiple cylinder drives, motor drive has higher positioning accuracy and efficiency, and the debugging time is short when the product is changed. The motor can adjust the clamping force according to the current feedback value to reduce product extrusion damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A three-dimensional diagram of a positioning device provided in an embodiment of the utility model.

[0022] Figure 2 A stereoscopic diagram from another perspective of the positioning device provided in an embodiment of the utility model.

[0023] Figure 3-8 A schematic diagram of the partial structure of a positioning device provided in an embodiment of the utility model.

[0024] In the attached picture:

[0025] 100, bottom plate;

[0026] 200, support column;

[0027] 300, top plate; 310, first through hole;

[0028] 400, cam mechanism; 410, cam; 411, guide groove; 412, rotating shaft; 420, cam follower;

[0029] 500, driving mechanism; 510, motor; 511, sensor; 520, first mounting plate; 530, second mounting plate;

[0030] 600, clamping mechanism; 610, guide rail; 620, connecting seat; 621, product contact member; 622, first connecting plate; 623, slider; 624, second connecting plate; 625, short side connecting member; 626, long side connecting member; 627, third connecting plate; 628, fourth connecting plate; 630, third mounting plate;

[0031] 700. Products. DETAILED DESCRIPTION

[0032] In order to have a clearer understanding of the technical features, purposes and effects of the present utility model, the specific implementation methods of the present utility model are now described in detail with reference to the accompanying drawings.

[0033] The utility model is suitable for the automatic positioning of fragile products made of glass materials such as mobile phone glass cover plates, solar silicon wafers, etc., and is also suitable for the positioning of other products such as wafer chips.

[0034] like Figure 1-8 As shown, an embodiment of the utility model provides a positioning device, which includes a base plate 100 , a support column 200 , a top plate 300 , a cam mechanism 400 , a driving mechanism 500 , and a clamping mechanism 600 .

[0035] The top plate 300 is erected above the bottom plate 100 through the support columns 200 ; the top plate 300 is used to carry the product 700 .

[0036] The present invention has no particular restrictions on the shapes of the top plate 300 and the bottom plate 100. Figure 1-2 As shown, in some embodiments of the present invention, the bottom plate 100 is a rectangle, the top plate 300 is a rectangle with arc-shaped concave edges in the center of the long sides on both sides, and the bottom plate 100 and the top plate 300 are fixedly connected by four support columns 200. In practical applications, the shapes of the top plate 100 and the bottom plate 300 and the number of support columns 200 can be set as needed.

[0037] like Figure 1-2 As shown, in some embodiments of the utility model, the bottom plate 100, the top plate 300, and the support column 200 constitute a frame, and two sets of cam mechanisms 400, a driving mechanism 500, and a clamping mechanism 600 are arranged on the frame, forming two sets of positioning devices, so that two products can be positioned at the same time. In practical applications, the number of positioning devices in the same frame can be set as needed.

[0038] The cam mechanism 400 includes a cam 410 and four cam followers 420 . The cam 410 is provided with four guide slots 411 . The four cam followers 420 are slidably disposed in the four guide slots 411 , respectively.

[0039] The cam 410 is provided with two guide grooves 411 arranged along a first direction and two guide grooves 411 arranged along a second direction, and the first direction and the second direction are perpendicular to each other.

[0040] The present invention has no particular restrictions on the shape of the cam 410. Figure 6As shown, in the embodiment of the utility model, the cam 410 is a cross-shaped structure, and two linear guide grooves 411 are symmetrically arranged on the two sides of the cross. The direction of the two guide grooves on one side is perpendicular to the direction of the guide grooves on the other side. In some other embodiments of the utility model, the cam 410 is a disc structure.

[0041] The driving mechanism 500 includes a motor 510 , and an output end of the motor 510 is drivingly connected to a rotating shaft 412 of the cam 410 .

[0042] In the embodiment of the utility model, one motor is used to replace multiple cylinders. Compared with the solution mentioned in the prior art that uses multiple power sources to drive multiple cylinders, the solution of one motor plus a cam has a simpler structure, lower cost, smaller space occupation, higher positioning accuracy and efficiency, so the debugging time when the product is changed is shorter. In addition, the control accuracy and efficiency of the motor are higher, and the motor has a current feedback function, which can adjust the clamping force according to the current value to reduce product extrusion damage.

[0043] In the embodiment of the utility model, the motor 510 includes a sensor for assisting the motor to return to zero.

[0044] The driving mechanism 500 further includes a first mounting plate 520 and two second mounting plates 530; the motor 510 is fixedly mounted on the lower surface of the first mounting plate 520; the cam 410 is arranged above the first mounting plate 520; the output end of the motor 510 is drivingly connected to the rotating shaft of the cam 410; the two opposite ends of the upper surface of the first mounting plate 520 are respectively fixedly connected to the lower surface of the top plate 300 through a second mounting plate 530. The height of the second mounting plate is less than the vertical distance between the top plate and the bottom plate, and a space for disassembling and assembling various components is reserved between the first mounting plate and the bottom plate.

[0045] The clamping mechanism 600 is fixedly connected to the top plate 300; the clamping mechanism 600 includes four clamping components; each of the clamping components includes a guide rail 610 and a connecting seat 620, the connecting seat 620 is fixedly connected to the cam follower 420 in a one-to-one correspondence, and the connecting seat 620 is slidingly connected to the guide rail 610 in a one-to-one correspondence; each of the connecting seats 620 is provided with a product contact piece 621, and the product contact piece 621 is used to clamp the product 700.

[0046] The top plate 300 is provided with a plurality of first through holes 310 , and the product contact member 621 passes through the first through holes 310 to abut against the product 700 .

[0047] The utility model has no particular limitation on the number of product contact members 621. In practical applications, the number of product contact members 621 can be set according to the shape and size of the product. Figure 1-8 As shown, in some embodiments of the present invention, the outer shape of the product is rectangular, and two product contact members 621 are provided on each of the connection seats 620. For circular or smaller rectangular products, each connection seat 620 may be provided with one product contact member 621.

[0048] The present invention has no particular restrictions on the shape and material of the product contact member 621. In some embodiments of the present invention, the product contact member 621 is an elastic cylinder, and the elastic design can prevent the product from being pinched. The design of the cylinder can make the product and the product contact member 621 have a line contact, reduce the contact area, and thus prevent the product from being pinched. In some other embodiments, the product contact member 621 can also be set to a rectangular parallelepiped or other shapes, and the product material can also be set to a flexible material without elasticity.

[0049] The clamping mechanism 600 further includes a third mounting plate 630 ; the upper surface of the third mounting plate 630 is fixedly connected to the top plate 300 ; and the lower surface of the third mounting plate 630 is fixedly connected to the guide rail 610 .

[0050] In the clamping mechanism 600 , two guide rails 610 are arranged along a third direction, and the other two guide rails 610 are arranged along a fourth direction; the third direction is perpendicular to the fourth direction.

[0051] Each of the connecting seats 620 includes a first connecting plate 622 and two sliders 623 arranged on the first connecting plate 622. The first connecting plate 622 is fixedly connected to the cam follower 420 in a one-to-one correspondence; the two sliders 623 are respectively arranged on both sides of the guide rail 610 and are slidably connected to the guide rail 610.

[0052] like Figure 6 As shown, in the embodiment of the utility model, the cam follower 420 is provided with a cylindrical protrusion, the first connecting plate 622 is provided with a second through hole corresponding to the cylindrical protrusion, and the external thread on the cylindrical protrusion and the internal thread on the second through hole are threadedly connected. In some other embodiments, the first connecting plate 622 is connected to the cam follower 420 by welding. The utility model does not limit the specific connection method between the connecting seat 620 and the cam follower 420.

[0053] Each of the connecting seats 620 also includes two second connecting plates 624, which are relatively arranged at one end of the first connecting plate 622 away from the cam follower 420, and the two second connecting plates 624 are arranged in parallel along the extension direction of the guide rail 610; the product contact piece 621 is arranged above the second connecting plate 624.

[0054] The first connecting plate 622 and the two second connecting plates 624 form a U-shaped structure, and the guide rail 610 can extend outward through the U-shaped structure.

[0055] In the embodiment of the utility model, the product contact member 621 is fixedly connected via a connecting member, and the connecting member is arranged above the second connecting plate 624 .

[0056] like Figure 3-Figure 5 As shown, in some embodiments of the present invention, the connector includes two short side connectors 625 and two long side connectors 626, and the short side connectors 625 are directly mounted above the two second connecting plates 624. In the connecting seat where the long side connectors 626 are located, the upper part of the two second connecting plates 624 is bridged by a third connecting plate 627, the long side connectors 626 are fixedly connected to the fourth connecting plate 628, and the fourth connecting plate 628 is fixedly connected to the third connecting plate 627. With such a design, the position between the second connecting plates 624 corresponding to the long side connectors 626 is smaller, so as not to block the connecting seat 620 next to it.

[0057] like Figure 1-2 As shown, a first through hole 310 is opened on the top plate 300 , and the short side connecting member 625 , the long side connecting member 626 , the product contact member 621 , and the fourth connecting plate 626 all pass through the first through hole 310 .

[0058] The working principle of the positioning device provided by the utility model is as follows:

[0059] When the motor rotates counterclockwise, the cam rotates counterclockwise with the motor, the cam follower moves toward the cam center, the connection seat slides on the guide rail toward the cam center, the product contact piece gradually approaches the product, and when the product contact piece abuts the product, the positioning is completed. Then, the motor stops rotating, the cam follower moves away from the cam center, the connection seat slides on the guide rail in the direction away from the cam center, and the product contact piece gradually moves away from the product.

[0060] When changing product models, adjust the motor rotation angle to change the stroke of the connecting seat to adapt to the new product size.

[0061] The utility model has the following beneficial effects: the positioning device provided by the scheme includes a top plate, a cam, a cam follower, a motor, and four clamping components; each clamping component includes a guide rail and a connecting seat; the top plate is used to carry the product, the cam is provided with four guide grooves, each guide groove is provided with a cam follower, the connecting seat and the cam follower are fixedly connected, the connecting seat is slidably connected with the guide rail, a product contact piece is provided on the connecting seat, the product contact piece passes through the through hole on the top plate and abuts against the product, the motor drives the cam to rotate, the cam follower slides in the guide groove as the cam rotates, the connecting seat slides along the guide rail driven by the cam follower, and the product contact piece approaches or moves away from the product. The positioning device provided by the scheme uses a motor instead of multiple cylinders, has a simple structure, small space, and low cost. Compared with multiple cylinder drives, motor drive has higher positioning accuracy and efficiency, and the debugging time is short when the product is changed. The motor can adjust the clamping force according to the current feedback value to reduce product extrusion damage.

[0062] The embodiments of the utility model are described above in conjunction with the accompanying drawings, but the utility model is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the enlightenment of the utility model, ordinary technicians in this field can also make many forms of deformation without departing from the scope of protection of the utility model and the claims, which all fall within the protection of the utility model.

Claims

1. A positioning device, characterized in that: It comprises a bottom plate (100), a support column (200), a top plate (300), a cam mechanism (400), a driving mechanism (500), and a clamping mechanism (600); The top plate (300) is erected above the bottom plate (100) via the support column (200); the top plate (300) is used to carry the product (700); The cam mechanism (400) comprises a cam (410) and four cam followers (420); the cam (410) is provided with four guide grooves (411); and the four cam followers (420) are respectively slidably disposed in the four guide grooves (411); The driving mechanism (500) comprises a motor (510), and an output end of the motor (510) is drivingly connected to a rotating shaft of the cam (410); The clamping mechanism (600) is fixedly connected to the top plate (300); the clamping mechanism (600) comprises four clamping assemblies; each of the clamping assemblies comprises a guide rail (610) and a connecting seat (620); the connecting seat (620) is fixedly connected to the cam follower (420) in a one-to-one correspondence; the connecting seat (620) is slidably connected to the guide rail (610) in a one-to-one correspondence; each of the connecting seats (620) is provided with a product contact piece (621), and the product contact piece (621) is used to clamp the product (700); The top plate (300) is provided with a plurality of first through holes (310), and the product contact member (621) passes through the first through holes (310) to abut against the product (700).

2. The positioning device according to claim 1, characterized in that: The cam (410) is provided with two guide grooves (411) arranged along a first direction and two guide grooves (411) arranged along a second direction, and the first direction and the second direction are perpendicular to each other.

3. The positioning device according to claim 1, characterized in that: The driving mechanism (500) further comprises a first mounting plate (520) and two second mounting plates (530); the motor (510) is fixedly mounted on the lower surface of the first mounting plate (520); the cam (410) is arranged above the first mounting plate (520); the output end of the motor (510) is transmission-connected to the rotating shaft (412) of the cam (410); and the opposite ends of the upper surface of the first mounting plate (520) are fixedly connected to the lower surface of the top plate (300) via a second mounting plate (530).

4. The positioning device according to claim 1, characterized in that: The clamping mechanism (600) further comprises a third mounting plate (630); the upper surface of the third mounting plate (630) is fixedly connected to the top plate (300); and the lower surface of the third mounting plate (630) is fixedly connected to the guide rail (610).

5. The positioning device according to claim 1, characterized in that: Two product contact members (621) are provided on each of the connection seats (620), and the product contact members (621) are elastic cylinders.

6. The positioning device according to claim 1, characterized in that: In the clamping mechanism (600), two guide rails (610) are arranged along a third direction, and the other two guide rails (610) are arranged along a fourth direction; the third direction is perpendicular to the fourth direction.

7. The positioning device according to claim 1, characterized in that: Each of the connecting seats (620) comprises a first connecting plate (622) and two sliding blocks (623) arranged on the first connecting plate (622); the first connecting plate (622) is fixedly connected to the cam follower (420) in a one-to-one correspondence; the two sliding blocks (623) are respectively arranged on both sides of the guide rail (610) and are slidably connected to the guide rail (610).

8. The positioning device according to claim 7, characterized in that: Each of the connecting seats (620) further includes two second connecting plates (624), wherein the two second connecting plates (624) are relatively arranged at one end of the first connecting plate (622) away from the cam follower (420), and the two second connecting plates (624) are arranged in parallel along the extension direction of the guide rail (610); and the product contact member (621) is arranged above the second connecting plate (624).

9. The positioning device according to claim 8, characterized in that: The product contact member (621) is fixedly connected via a connecting member, and the connecting member is arranged above the second connecting plate (624).

10. The positioning device according to claim 9, characterized in that: The connecting member comprises two short side connecting members (625) and two long side connecting members (626), wherein the short side connecting members (625) are mounted above the two second connecting plates (624); in the connecting seat (620) where the long side connecting members (626) are located, the tops of the two second connecting plates (624) are bridged by a third connecting plate (627), the long side connecting members (626) are fixedly connected to the fourth connecting plate (628), and the fourth connecting plate (628) is fixedly connected to the third connecting plate (627).

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