Positioning device

Abstract

The utility model provides a positioning device which is used for positioning a material piece with the shape of an axial symmetry figure, a hole is formed in the material piece, the hole is located on the symmetry axis of the material piece, and the positioning device comprises a first positioning assembly and a second positioning assembly, and the first positioning assembly comprises at least two oppositely-arranged first positioning pieces; the clamping assembly is arranged between the at least two oppositely-arranged first positioning pieces, and the clamping assembly can stretch into the hole and can be clamped into the hole so as to limit movement of the material piece in the first direction; wherein the material piece can rotate around the clamping assembly, the at least two oppositely-arranged first positioning pieces can push the material piece to move in the second direction so that the material piece can be straightened, and centering positioning of the material piece is achieved by clamping the material piece through the at least two oppositely-arranged first positioning pieces. In this way, the symmetry axis of the material piece coincides with the center of the robot gripper, the gripping efficiency of the robot gripper is improved, meanwhile, the matching precision of the material piece and other material pieces is improved, and the welding efficiency and the welding quality are improved.

Description

Technical Field

[0001] The present application relates to the technical field of engineering machinery, and in particular to a positioning device. Background Art

[0002] At present, the product structure of the positioning table is mostly a mechanism with an inclined surface and a universal bull's eye ball. The principle of positioning is: the robot gripper grabs the material and places it on the inclined surface. The material slides down to the limit position by its own gravity to complete the positioning. However, this positioning method has the problem that the material cannot be straightened. In this case, when the robot gripper grabs the material on the above positioning table and moves it to the positioner for the next step of welding, the symmetry axis of the material cannot coincide with the center of the robot gripper, which reduces the matching accuracy of the material and other material parts on the positioner, affecting the welding efficiency and welding quality. Utility Model Content

[0003] In view of this, the present application provides a positioning device that can accurately position material parts and improve welding efficiency and welding quality.

[0004] In order to achieve the above objectives, this application provides the following technical solutions:

[0005] A positioning device for positioning a material piece having an axisymmetric shape, wherein the material piece is provided with a hole, the hole being located on the axis of symmetry of the material piece, the positioning device comprising:

[0006] A first positioning assembly includes at least two first positioning members arranged opposite to each other;

[0007] a clamping assembly disposed between the at least two oppositely disposed first positioning members, the clamping assembly being capable of extending into and being clamped in the hole to limit movement of the material member in the first direction;

[0008] In which, the material part can rotate around the clamping assembly, and the at least two relatively arranged first positioning parts can push the material part to move in the second direction to align the material part, and the material part can be clamped by the at least two relatively arranged first positioning parts to achieve the centering positioning of the material part.

[0009] Optionally, the above-mentioned positioning device further includes a second positioning component spaced apart from the first positioning component in the first direction, and the second positioning component includes at least two relatively arranged second positioning members, and the positioning of the material part in the first direction is achieved by clamping the material part by the at least two relatively arranged second positioning members.

[0010] Optionally, in the above positioning device, the clamping assembly includes:

[0011] Bottom support;

[0012] A clamping portion is provided on the top of the bottom support and can extend into and be clamped in the hole;

[0013] The driving member is used to drive the clamping portion to expand and contract in a radial direction so as to adapt to the holes of different diameters.

[0014] Optionally, in the above-mentioned positioning device, the clamping portion includes a fixed portion connected to the top of the bottom support, and a plurality of telescopic rods connected to the fixed portion, and the telescopic rods are driven to extend and retract in the radial direction by the driving member to change the size of the telescopic rods.

[0015] Optionally, the positioning device further includes a support block that is at the same height as the bottom support and is spaced apart in the first direction, so as to support the material piece so that it is in a horizontal state.

[0016] Optionally, in the above positioning device, the first positioning assembly includes a first driving assembly for driving the first positioning member to move, and the first driving assembly includes:

[0017] a first lead screw connected to the first positioning member;

[0018] a first nut, sleeved on the first lead screw and engaged with the thread of the first lead screw;

[0019] The first motor is used to drive the first nut to rotate.

[0020] Optionally, in the above positioning device, the second positioning assembly includes a second driving assembly for driving the second positioning member to move, and the second driving assembly includes:

[0021] a second lead screw connected to the second positioning member;

[0022] a second nut, sleeved on the second lead screw and engaged with the thread of the second lead screw;

[0023] The second motor is used to drive the second nut to rotate.

[0024] Optionally, in the above positioning device, the first positioning assembly further comprises: a slider connected to the first positioning member;

[0025] The guide rails are distributed on both sides of the clamping assembly, are slidably connected to the slider, and are arranged along a first direction.

[0026] Optionally, in the above positioning device, the first positioning assembly and the second positioning assembly are symmetrically arranged about the symmetry axis of the bottom support; and / or,

[0027] A rolling element is provided on the support block to reduce friction between the material piece and the support block.

[0028] Optionally, the above-mentioned positioning device also includes a controller electrically connected to the first positioning component and the second positioning component, and the size of the material part in the first direction is input into the controller to respectively control the moving distance of the at least two relatively arranged first positioning parts and the at least two relatively arranged second positioning parts.

[0029] The present application extends a clamping component into a hole opened on the material part to achieve centering limit of the material part and limit the movement of the material part in a first direction, and then at least two relatively arranged first positioning parts can push the material part to move in a second direction to straighten the material part, and the material part is clamped by at least two relatively arranged first positioning parts to achieve centering positioning of the material part. In this way, the symmetry axis of the material part coincides with the center of the robot gripper, thereby improving the gripping efficiency of the robot gripper, while improving the matching accuracy of the material part with other material parts, and improving welding efficiency and welding quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without any creative work.

[0031] Figure 1 A top view of a positioning device provided in an embodiment of the present application;

[0032] Figure 2 This is a front view of a positioning device provided in an embodiment of the present application.

[0033] exist Figure 1-Figure 2 middle:

[0034] 1. First positioning assembly; 2. Clamping assembly; 3. Second positioning assembly; 4. Support block; 5. Positioning platform;

[0035] 11. First positioning member; 12. First driving assembly; 13. Guide rail; 121. First lead screw; 122. First motor;

[0036] 21. Bottom support; 22. Clamping portion; 23. Driving member; 221. Fixing portion; 222. Telescopic rod;

[0037] 31. Second positioning member; 32. Second driving assembly; 321. Second lead screw; 322. Second motor. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0039] like Figure 1-Figure 2 As shown, an embodiment of the present application provides a positioning device for positioning a material piece having an axisymmetric shape, wherein the material piece has a hole formed therein, the hole being located on the material piece's axis of symmetry. The positioning device includes a first positioning assembly 1 and a clamping assembly 2. The first positioning assembly 1 includes at least two oppositely disposed first positioning members 11. The clamping assembly 2 is disposed between the at least two oppositely disposed first positioning members 11. The clamping assembly 2 can extend into and clamp into the hole of the material piece to limit the movement of the material piece in a first direction. This first direction limitation constitutes initial positioning. Subsequently, the at least two oppositely disposed first positioning members 11 can push the material piece in a second direction. That is, when the material piece is pushed in the second direction, the material piece rotates about the clamping assembly 2. When the material piece is aligned, the at least two oppositely disposed first positioning members 11 clamp the material piece to achieve centering of the material piece. This allows the axis of symmetry of the material piece to coincide with the center of the robot gripper, thereby improving the gripping efficiency of the robot gripper, while also improving the accuracy of the fit between the material piece and other materials, thereby improving welding efficiency and quality.

[0040] It should be noted that if Figure 1 As shown, the first direction is the length direction and the second direction is the width direction.

[0041] It should also be noted that, in one example, at least two relatively arranged first positioning members 11 move toward each other to clamp the material piece; in another example, two first positioning members 11 are provided, one of which is in a stationary state, and the other can push the material piece to move in the second direction to thereby align it.

[0042] For ease of understanding, this application is explained by taking the example of two first positioning members 11 and two second positioning members 31 (see below) each being provided. Preferably, this application has two first positioning members 11 arranged opposite to each other that can move toward each other, and two second positioning members 31 arranged opposite to each other that can move toward each other.

[0043] Furthermore, the positioning device also includes a second positioning assembly 3 spaced apart from the first positioning assembly 1 in the first direction. The second positioning assembly 3 includes at least two oppositely disposed second positioning members 31. The material is positioned in the first direction by clamping the material with the at least two oppositely disposed second positioning members 31. Thus, it can be seen that in the first direction, the first positioning assembly 1 and the second positioning assembly 3 respectively locate different positions of the material. The distance between the first positioning assembly 1 and the second positioning assembly 3 can be determined based on the length of the material to accommodate materials of various length specifications and improve positioning effectiveness.

[0044] In some other optional embodiments, in addition to the above-mentioned first positioning component 1 and second positioning component 3, a third positioning component and / or a fourth positioning component may also be provided, wherein, in the first direction, the third positioning component and the fourth positioning component are spaced apart from the first positioning component 1 and the second positioning component 3, and the structure of the third positioning component and the fourth positioning component is the same as that of the first positioning component 1 or the second positioning component 3.

[0045] Furthermore, the clamping assembly 2 includes a base support 21; a clamping portion 22 disposed on top of the base support 21 and capable of extending into and engaging within the hole; and a driver 23 for driving the clamping portion 22 to expand and contract radially to accommodate holes of varying diameters. Thus, the clamping assembly 2 has a simple structure, and by driving the clamping portion 22 to expand and contract via the driver 23, it can accommodate holes of varying diameters (i.e., different materials), thereby enhancing the versatility and practicality of the positioning device.

[0046] In some other optional embodiments, the snap-fit assembly 2 may not include the bottom support 21, that is, the snap-fitting portion of the snap-fit assembly 2 can be directly set on the positioning platform 5. It should be noted that the positioning platform 5 is used to carry the first positioning assembly 1, the second positioning assembly 3 and the material part, and the positioning platform 5 is part of the positioning device.

[0047] The clamping portion 22 includes a fixed portion 221 connected to the top of the bottom support 21, and multiple telescopic rods 222 connected to the fixed portion 221. The telescopic rods 222 are driven to extend and retract radially by the driving member 23 to change the size of the telescopic rods 222. It can be understood that the fixed portion 221 is located at the center of the top of the bottom support 21, and the telescopic rods 222 are distributed on the sides of the fixed portion 221. This arrangement is simple and easy to operate.

[0048] It should be noted that when the material piece is first moved to the position of the clamping portion 22, the telescopic rod 222 of the clamping portion 22 may not abut the hole of the material piece to allow the material piece to rotate around the clamping portion 22, so that the first positioning component 1 can push the material piece in the second direction. When the material piece is straightened, the driving member 23 drives the material piece to abut the hole of the material piece to better position the material piece.

[0049] It should also be noted that the driving member 23 can be, but is not limited to, a motor, a hydraulic cylinder, etc.

[0050] In some other optional embodiments, the clamping portion 22 connected to the fixing portion 221 may not be the telescopic rod 222, but may be a disc structure, that is, the driving member 23 drives the diameter of the disc to change, thereby abutting against the hole on the material piece.

[0051] In addition, the positioning device further includes a support block 4 that is at the same height as the bottom support 21 and spaced apart in the first direction to support the material piece so that it is in a horizontal state, thereby further improving the accuracy of positioning the material piece.

[0052] In some optional embodiments, the first positioning assembly 1 includes a first drive assembly 12 for driving the first positioning member 11. The first drive assembly 12 comprises a first screw 121 connected to the first positioning member 11; a first nut sleeved on and threadedly engaged with the first screw 121; and a first motor 122 for rotating the first nut. It can be understood that when the first motor 122 is turned on, it drives the first nut to rotate, thereby causing the first screw 121 to push the first positioning member 11 toward or away from the material. This drive mechanism has a simple driving principle.

[0053] It should be noted that a gear structure may be further provided between the first lead screw 121 and the first motor 122 , that is, the gear structure serves as a transmission member to transmit the rotation of the output shaft of the first motor 122 to the first nut.

[0054] The second positioning assembly 3 includes a second drive assembly 32 for driving the second positioning member 31 to move, and the second drive assembly 32 includes: a second lead screw 321, connected to the second positioning member 31; a second nut, sleeved on the second lead screw 321 and threadedly engaged with the second lead screw 321; a second motor 322, for driving the second nut to rotate. The structure of the second drive assembly 32 is the same as that of the first drive assembly 12, and the working principle of the second drive assembly 32 is the same as that of the first drive assembly 12. Therefore, the working principle of the second drive assembly 32 will not be described in detail. Please refer to the introduction to the working principle of the first drive assembly 12. Accordingly, a gear structure can also be provided between the second lead screw 321 and the second motor 322, that is, the gear structure serves as a transmission member to transmit the rotation of the output shaft of the second motor 322 to the second nut.

[0055] Preferably, in the present application, the number of first motors 122 is set in a one-to-one correspondence with the number of first positioning members 11, and the number of second motors 322 is set in a one-to-one correspondence with the number of second positioning members 31, so that the motor's control over the positioning members is more flexible and independent.

[0056] The first positioning assembly 1 further includes a slider connected to the first positioning member 11; and guide rails 13 disposed on either side of the clamping assembly 2, slidably connected to the slider and arranged along the first direction. It can be understood that the slider drives the first positioning members 11 to move toward each other on the guide rails 13 to clamp the material. It should be noted that the guide rails 13 are preferably linear guides. This arrangement effectively prevents the first positioning members 11 from becoming misaligned during the process of approaching each other.

[0057] Accordingly, the second positioning assembly 3 may also include a slider connected to the second positioning member 31; and guide rails 13 disposed on either side of the clamping assembly 2 and slidably connected to the slider and arranged along the first direction. The slider drives the second positioning member 31 to move toward each other on the guide rails 13 to clamp the material. This arrangement effectively prevents the second positioning member 31 from misaligning during the process of approaching.

[0058] Either or both of the first positioning assembly 1 and the second positioning assembly 3 may be provided with the above-mentioned slider guide rail 13 structure, and the specific setting depends on actual needs.

[0059] In some optional embodiments, the first positioning assembly 1 and the second positioning assembly 3 are symmetrically arranged about the symmetry axis of the bottom support 21. In the present application, the first positioning assembly 1 and the second positioning assembly 3 are both arranged on the positioning platform 5, and the two oppositely arranged first positioning members 11 are at equal distances from the material. The first motor 122 drives the two oppositely arranged first positioning members 11 to approach the material at the same speed to push the material in the second direction to align it, and then clamps the material to complete positioning; the two oppositely arranged second positioning members 31 are at equal distances from the material, and the second motor 322 drives the two oppositely arranged second positioning members 31 to approach the material at the same speed to simultaneously clamp the material to achieve positioning of the material.

[0060] It should be noted that the first positioning member 11 component and the second positioning member 31 component can simultaneously push the material part to align it and then clamp the material part, or one of the first positioning member 11 component and the second positioning member 31 component first pushes the material part to align and then clamps the material part at the same time, thereby achieving the positioning of the material part.

[0061] In some other optional embodiments, the first positioning component 1 and the second positioning component 3 may also be asymmetric about the symmetry axis of the bottom support 21, that is, the distances between the two relatively arranged first positioning members 11 and the material part are different, and the distances between the two relatively arranged second positioning members 31 and the material part are also different. At this time, the first motor 122 and the second motor 322 can be used to respectively control the moving speeds of the first positioning member 11 and the second positioning member 31, so that the material part can be straightened.

[0062] And / or, a rolling element is provided on the support block 4 to reduce the friction between the material and the support block 4. The rolling element can be a common rolling element in engineering such as a ball.

[0063] In addition, the system also includes a controller electrically connected to the first positioning assembly 1 and the second positioning assembly 3. The controller inputs the dimensions of the material in the first direction to control the movement distances of at least two oppositely disposed first positioning members 11 and at least two oppositely disposed second positioning members 31. The controller is preferably a PLC. The controller controls the movement distances of the first positioning assembly 1 and the second positioning assembly 3 so that they stop at the correct position for the material, achieving precise alignment of the material.

[0064] In some other optional embodiments, sensors may be further provided in the first positioning component 1 and the second positioning component 3. The sensors are used to sense the movement distance of the positioning members (the first positioning member 11 and the second positioning member 31), thereby transmitting the movement distance to the controller, and the controller is used to control the first positioning member 11 or the second positioning member 31 to stop.

[0065] The block diagrams of the devices, devices, equipment, and systems involved in this application are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As will be appreciated by those skilled in the art, these devices, devices, equipment, and systems can be connected, arranged, or configured in any manner. Words such as "include," "comprise," "have," and the like are open-ended words, meaning "including but not limited to," and can be used interchangeably therewith. The words "or" and "and" used herein refer to the words "and / or" and can be used interchangeably therewith, unless the context clearly indicates otherwise. The word "such as" used herein refers to the phrase "such as but not limited to," and can be used interchangeably therewith.

[0066] It should be understood that the qualifiers "first", "second", "third", "fourth", "fifth" and "sixth" used in the description of the embodiments of the present application are only used to more clearly illustrate the technical solutions and cannot be used to limit the scope of protection of the present application.

[0067] The above description has been provided for the purpose of illustration and description. Furthermore, this description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although a number of example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations thereof.

Claims

1. A positioning device, characterized in that: The positioning device is used for positioning a material piece having an axisymmetric shape, wherein the material piece is provided with a hole, and the hole is located on the axis of symmetry of the material piece, and the positioning device comprises: A first positioning assembly includes at least two first positioning members arranged opposite to each other; a clamping assembly disposed between the at least two oppositely disposed first positioning members, the clamping assembly being capable of extending into and being clamped in the hole to limit movement of the material member in the first direction; In which, the material part can rotate around the clamping assembly, and the at least two relatively arranged first positioning parts can push the material part to move in the second direction to align the material part, and the material part can be clamped by the at least two relatively arranged first positioning parts to achieve the centering positioning of the material part.

2. The positioning device according to claim 1, characterized in that It also includes a second positioning component spaced apart from the first positioning component in the first direction, the second positioning component includes at least two oppositely arranged second positioning members, and the positioning of the material part in the first direction is achieved by clamping the material part through the at least two oppositely arranged second positioning members.

3. The positioning device according to claim 2, characterized in that The clamping assembly comprises: Bottom support; A clamping portion is provided on the top of the bottom support and can extend into and be clamped in the hole; The driving member is used to drive the clamping portion to expand and contract in a radial direction so as to adapt to the holes of different diameters.

4. The positioning device according to claim 3, characterized in that The clamping portion includes a fixing portion connected to the top of the bottom support, and a plurality of telescopic rods connected to the fixing portion. The driving member drives the telescopic rods to extend and retract in a radial direction to change the size of the telescopic rods.

5. The positioning device according to claim 4, characterized in that It also includes a support block that is at the same height as the bottom support and is spaced apart in the first direction to support the material piece so that it is in a horizontal state.

6. The positioning device according to claim 1, characterized in that The first positioning assembly includes a first driving assembly for driving the first positioning member to move, and the first driving assembly includes: a first lead screw connected to the first positioning member; a first nut, sleeved on the first lead screw and engaged with the thread of the first lead screw; The first motor is used to drive the first nut to rotate.

7. The positioning device according to claim 2, characterized in that The second positioning assembly includes a second driving assembly for driving the second positioning member to move, and the second driving assembly includes: a second lead screw connected to the second positioning member; a second nut, sleeved on the second lead screw and engaged with the thread of the second lead screw; The second motor is used to drive the second nut to rotate.

8. The positioning device according to claim 6, characterized in that The first positioning component also includes: a slider connected to the first positioning member; The guide rails are distributed on both sides of the clamping assembly, are slidably connected to the slider, and are arranged along a first direction.

9. The positioning device according to claim 5, characterized in that The first positioning assembly and the second positioning assembly are symmetrically arranged about the symmetry axis of the bottom support; and / or, A rolling element is provided on the support block to reduce friction between the material piece and the support block.

10. The positioning device according to claim 2, characterized in that It also includes a controller electrically connected to the first positioning component and the second positioning component, and the size of the material piece in the first direction is input into the controller to control the movement distance of the at least two oppositely arranged first positioning members and the at least two oppositely arranged second positioning members respectively.

Images