Fixture positioning device

Abstract

The utility model discloses a fixture positioning device which comprises a lower bracket, a guide mechanism, a buffer mechanism and a locking mechanism, the guide mechanism, the buffer mechanism and the locking mechanism are arranged on the lower bracket, the guide mechanism comprises a guide wheel and a riding wheel which are rotatably arranged and used for being in contact with a matching block on a welding fixture, and the axis of the riding wheel is perpendicular to the axis of the guide wheel. The multiple guide mechanisms are arranged, the locking mechanism is arranged to be used for applying clamping force to the welding clamp, and the buffering mechanism is arranged to be located in front of the advancing direction of the welding clamp and used for making contact with a buffering block on the welding clamp. According to the fixture positioning device, the guide mechanism, the locking mechanism and the buffer mechanism are matched, so that accurate positioning and fixing of the automobile part welding fixture can be ensured.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of automobile parts production equipment, specifically, the utility model relates to a fixture positioning device. BACKGROUND

[0002] The assembly on the automobile is welded by multiple sheet metal parts in the manufacturing process, and a welding fixture needs to be used to clamp and fix each sheet metal part.

[0003] The existing welding fixture is fixed by relying on the bottom casters when stopping at the welding station, and this mode is unreliable, and the operator is easy to forget to lock the casters, which may cause the fixture to move during welding and affect the welding operation.

[0004] The Chinese patent with the application number 201920066511.1 discloses a robot spot welding fixture quick change system, which comprises a fixture support seat, universal ball eye bearings for supporting the fixture, a guide device for guiding the fixture, a positioning device for positioning the fixture, and a limiting device for limiting the fixture in the first direction, the universal ball eye bearings, the guide device, the positioning device, and the limiting device are arranged on the fixture support seat, the universal ball eye bearings are arranged in multiple, and the positioning device is arranged in multiple.

[0005] It is hoped to provide an improved fixture positioning device, especially to ensure the accurate positioning and fixing of the automobile part welding fixture. UTILITY MODEL CONTENT

[0006] The utility model provides a fixture positioning device, which aims to ensure the accurate positioning and fixing of the automobile part welding fixture.

[0007] In order to achieve the above purpose, the utility model adopts the technical scheme of: a fixture positioning device, which comprises a lower bracket, a guide mechanism, a buffer mechanism, and a locking mechanism arranged on the lower bracket, the guide mechanism comprises a guide wheel rotatably arranged and used for contacting a cooperating block on the welding fixture, and a carrier wheel, the axis of the carrier wheel is perpendicular to the axis of the guide wheel, the guide mechanism is arranged in multiple, the locking mechanism is arranged to apply clamping force to the welding fixture, and the buffer mechanism is arranged in front of the welding fixture in the direction of travel and used for contacting a buffer block on the welding fixture.

[0008] The axis of the carrier wheel is a horizontal line, and the axis of the guide wheel is a vertical line.

[0009] The guide mechanism further comprises a first guide support and a second guide support, the carrier wheel is arranged on the first guide support, and the guide wheel is arranged on the second guide support.

[0010] The first contact surface and the second contact surface are both obliquely arranged planes.

[0011] The first contact surface has an acute angle with a horizontal plane, and the second contact surface has an acute angle with a vertical plane.

[0012] The guiding mechanisms are arranged in two rows, and the corresponding cooperating blocks are also arranged in two rows.

[0013] The buffer mechanism comprises a buffer support arranged on the lower bracket and a hydraulic buffer arranged on the buffer support.

[0014] The buffer mechanism comprises a buffer support arranged on the lower bracket and a hydraulic buffer arranged on the buffer support.

[0015] The locking mechanism comprises a locking seat and a door-latch type clamp arranged on the locking seat, and the welding fixture is provided with a locking block matched with the door-latch type clamp.

[0016] The locking mechanism comprises a locking seat and a door-latch type clamp arranged on the locking seat, and the welding fixture is provided with a locking block matched with the door-latch type clamp.

[0017] The clamp positioning device of the utility model, through the cooperation of the guiding mechanism, the locking mechanism and the buffer mechanism, can ensure the accurate positioning and fixing of the automobile part welding fixture. BRIEF DESCRIPTION OF DRAWINGS

[0018] The present specification includes the following drawings, and the shown contents are respectively:

[0019] Figure 1 It is the structure schematic view of the clamp positioning device of the utility model;

[0020] Figure 2 It is the use state schematic view of the clamp positioning device of the utility model;

[0021] Figure 3 It is another use state schematic view of the clamp positioning device of the utility model;

[0022] Figure 4 It is the structure schematic view of the guiding mechanism and the locking mechanism;

[0023] Figure 5 It is the structure schematic view of the locking mechanism;

[0024] Marked in the figure: 1, guide wheel; 2, carrier wheel; 3, buffer block; 4, matching block; 5, first contact surface; 6, second contact surface; 7, buffer support; 8, hydraulic buffer; 9, locking seat; 10, door latch type clamp; 11, locking block; 12, lower bracket; 13, first guide support; 14, second guide support. DETAILED DESCRIPTION

[0025] The specific embodiments of the utility model are further described in detail below by comparing the drawings and describing the embodiments, the purpose is to help the skilled in the art to have more complete, accurate and in-depth understanding of the concept, technical scheme of the utility model, and to help its implementation.

[0026] As Figures 1 to 5 shown, the utility model provides a kind of clamp positioning device, including lower bracket 12 and the guide mechanism, buffer mechanism and locking mechanism being set on lower bracket 12, guide mechanism includes rotatable setting and being used for the contact of guiding wheel 1 and carrier wheel 2 with the matching block 4 on welding clamp, the axis of carrier wheel 2 is perpendicular to the axis of guiding wheel 1, guide mechanism is set multiple, locking mechanism is set into for exerting clamping force to welding clamp, buffer mechanism is set into the front of the direction of travel of welding clamp, and it is used for the contact with the buffer block 3 on welding clamp.

[0027] Specifically, as Figures 1 to 3 shown, lower bracket 12 is fixedly arranged, locking mechanism is installed at one end of lower bracket 12, buffer mechanism is installed at the other end of lower bracket 12, and the main role of guide mechanism is to guide welding clamp to accurately reach predetermined position.Locking mechanism is used to firmly fix welding clamp after reaching predetermined position, to prevent movement or deviation during welding process. Buffer mechanism is mainly used to absorb impact and vibration that may be generated during movement and positioning of welding clamp.

[0028] As Figures 1 to 3As shown, the lower bracket 12 is located between the two rows of casters arranged at the bottom of the welding fixture, the lower bracket 12 is fixedly arranged on the ground at the welding station, and the lower bracket 12 is stationary. The guide wheels 1 and the carrier wheels 2 are cylinders, the axis of the carrier wheels 2 is a horizontal line, and the axis of the guide wheels 1 is a vertical line. Four guide mechanisms are arranged, and the four guide mechanisms are arranged in two rows. Correspondingly, the four matching blocks 4 are also arranged. The guide wheels 1 of the two guide mechanisms in the same row are in the same straight line parallel to the second direction, the guide wheels 1 of the two guide mechanisms in the same row are used to limit the welding fixture in the second direction, the guide wheels 1 of the two guide mechanisms in the same row are respectively in contact with the two matching blocks 4 in the same straight line parallel to the second direction, and the two matching blocks 4 are located between the two guide wheels 1, which ensures that the fixture does not deviate from the predetermined moving path. The two rows of guide mechanisms are arranged in sequence along the first direction, and the first direction and the second direction are both horizontal directions and perpendicular to each other. The axis of the carrier wheels 2 is parallel to the second direction, and in the process of pushing the welding fixture to the welding station, the moving direction of the welding fixture is parallel to the first direction, the bottom surface of the matching block 4 is in contact with the outer circular surface of the carrier wheel 2, the side surface of the matching block 4 is in contact with the outer circular surface of the guide wheel 1, the matching block 4 and the guide block and the carrier wheel 2 are in rolling friction, and the guide wheel 1 provides a guide function for the welding fixture, so that the fixture moves stably along the first direction to the welding station, and all the carrier wheels 2 provide support for the welding fixture. The same number of guide wheels 1 and carrier wheels 2 are arranged in each row to ensure that the fixture is evenly stressed during sliding and improve stability.

[0029] As Figures 1 to 4As shown, the guide mechanism further comprises a first guide support 13 and a second guide support 14, the carrier wheel 2 is arranged on the first guide support 13, and the guide wheel 1 is arranged on the second guide support 14. The lower ends of the first guide support 13 and the second guide support 14 are fixedly connected with the lower bracket 12, the carrier wheel 2 is installed on the upper end of the first guide support 13 through a rotating shaft, and the guide wheel 1 is installed on the upper end of the second guide support 14 through a rotating shaft. The first contact surface 5 in contact with the carrier wheel 2 and the second contact surface 6 in contact with the guide wheel 1 are arranged on the cooperation block 4, and the first contact surface 5 and the second contact surface 6 are both inclined planes. The first contact surface 5 has an included angle with the horizontal plane, and the included angle is an acute angle; the second contact surface 6 has an included angle with the vertical plane, and the included angle is an acute angle. The first guide sliding surface in contact with the carrier wheel 2 is arranged on the cooperation block 4, the first end of the first contact surface 5 is connected with the lower edge of the end surface on the cooperation block 4, the second end of the first contact surface 5 is connected with the edge of the first guide sliding surface, the first guide sliding surface is a plane parallel to the first direction and the second direction, the first end and the second end of the first contact surface 5 are two ends in the length direction of the first contact surface 5, the height of the first end of the first contact surface 5 is greater than the height of the second end, and the first contact surface 5 is an upwardly inclined inclined plane. The second guide sliding surface in contact with the carrier wheel 2 is arranged on the cooperation block 4, the first end of the second contact surface 6 is connected with the side edge of the end surface on the cooperation block 4, the second end of the second contact surface 6 is connected with the edge of the second guide sliding surface, the second guide sliding surface is a vertical plane parallel to the first direction and perpendicular to the second direction, the first end and the second end of the second contact surface 6 are two ends in the length direction of the second contact surface 6, and the distance between the first ends of the second contact surfaces 6 of the two cooperation blocks 4 in the same row is greater than the distance between the second ends of the second contact surfaces 6 of the two cooperation blocks 4. The first contact surface 5 is an inclined plane, in contact with the carrier wheel 2, and the inclination angle is an acute angle, so that the cooperation block 4 can better adapt to the rolling of the carrier wheel 2, can be moved above the carrier wheel 2, and can reduce friction and wear. The second contact surface 6 is also an inclined plane, in contact with the guide wheel 1, and the inclination angle is also an acute angle, which helps the guide wheel 1 to accurately guide the welding fixture. The design of the cooperation block 4 fully considers the movement and positioning requirements of the welding fixture, and through the accurate inclined design and the cooperative work with the carrier wheel 2 and the guide wheel 1, the accurate movement and stable positioning of the welding fixture are realized.

[0030] As Figures 1 to 3As shown, the buffer mechanism includes a buffer support 7 arranged on the lower bracket 12 and a hydraulic buffer 8 arranged on the buffer support 7. The buffer mechanism is arranged in multiple, all of which are arranged in the same row and are in the same straight line parallel to the second direction. The lower end of the buffer support 7 is fixedly connected with the lower bracket 12, and the hydraulic buffer 8 is installed at the upper end of the buffer support 7. The length direction of the hydraulic buffer 8 is parallel to the first direction, and the hydraulic buffer 8 is used to contact with the buffer block 3. The hydraulic buffer 8 absorbs and reduces impact energy through the hydraulic mechanism inside it. The structure of the hydraulic buffer 8 is as known to those skilled in the art, and will not be described here. The hydraulic buffer 8 can absorb and reduce a large amount of impact energy, ensuring that the welding fixture will not be damaged during movement. The design of the buffer mechanism ensures the stability of the welding fixture during movement, reducing errors caused by impact and vibration.

[0031] As shown, Figures 1 to 3 In this embodiment, two buffer mechanisms are arranged.

[0032] As shown, Figures 1 to 5 The locking mechanism includes a locking seat 9 and a latch clamp 10 arranged on the locking seat 9. The welding fixture is provided with a locking block 11 matched with the latch clamp 10. The structure of the latch clamp 10 is as known to those skilled in the art, generally including a rotatable clamp arm and an operating mechanism for driving the clamp arm to rotate, which will not be described here. The locking seat 9 is fixedly installed on the lower bracket 12, and the latch clamp 10 is installed on the locking seat 9. The locking block 11 is installed on the welding fixture, and a groove matched with the latch clamp 10 is arranged on the locking block 11. The cooperation between the latch clamp 10 and the locking block 11 is realized by the rotation of the clamp arm of the latch clamp 10. When the clamp arm is rotated to the locking position, it will form a certain clamping force with the locking block 11. The clamp arm is embedded in the groove on the locking block 11 to clamp the locking block 11, thereby ensuring the stability and reliability of the welding fixture.

[0033] When it is necessary to fix the welding fixture at a predetermined position, the operator will rotate the clamp arm of the latch clamp 10 (or operate the reverse movement of other driving mechanisms) to make it contact with the locking block 11. With the continuous rotation of the clamp arm, it will gradually clamp the locking block 11 until a predetermined clamping force is reached. At this time, the welding fixture will be firmly fixed at the predetermined position and cannot be moved or shaken. When it is necessary to release the welding fixture, the operator only needs to reverse the rotation of the clamp arm (or operate the reverse movement of other driving mechanisms) to make it separate from the locking block 11. Through the close cooperation between the latch clamp 10 and the locking block 11, the stability and reliability of the welding fixture during processing can be ensured. The latch clamp 10 usually has a simple operating mechanism, so that the operator can easily realize the locking and release of the clamp.

[0034] As Figures 1 to 3 shown, in the present embodiment, two locking mechanisms are provided, all the locking mechanisms are arranged in the same row, and all the locking mechanisms are in the same straight line parallel to the second direction.

[0035] The utility model is described above with reference to the drawings. Obviously, the utility model is not limited by the above-mentioned mode. As long as various non-essential improvements are made by using the method concept and technical scheme of the utility model; or without improvement, the above-mentioned concept and technical scheme of the utility model are directly applied to other occasions, which are within the protection scope of the utility model.

Claims

1. A fixture positioning device, characterized by: The device comprises a lower bracket, a guide mechanism, a buffer mechanism and a locking mechanism arranged on the lower bracket, the guide mechanism comprises rotatable guide wheels and carrier wheels arranged to contact with cooperating blocks on the welding fixture, the axis of the carrier wheels is perpendicular to the axis of the guide wheels, the guide mechanism is arranged in multiple, the locking mechanism is arranged to apply clamping force to the welding fixture, the buffer mechanism is arranged in front of the welding fixture in the direction of travel and contacts with buffer blocks on the welding fixture.

2. The fixture positioning device of claim 1, wherein: The axis of the carrier wheels is a horizontal line, and the axis of the guide wheels is a vertical line.

3. The fixture positioning device of claim 1, wherein: The guide mechanism further comprises first guide supports and second guide supports, the carrier wheels are arranged on the first guide supports, and the guide wheels are arranged on the second guide supports.

4. The fixture positioning device of claim 1, wherein: The cooperating blocks are provided with first contact surfaces contacting the carrier wheels and second contact surfaces contacting the guide wheels, and the first and second contact surfaces are both inclined planes.

5. The fixture positioning device of claim 4, wherein: The first contact surfaces have an included angle with the horizontal plane, and the included angle is an acute angle, and the second contact surfaces have an included angle with the vertical plane, and the included angle is an acute angle.

6. A fixture positioning device according to any one of claims 1 to 5, wherein: The guide mechanism is arranged in four, and the four guide mechanisms are arranged in two rows, and correspondingly, the cooperating blocks are also arranged in four.

7. A fixture positioning device according to any one of claims 1 to 5, wherein: The buffer mechanism comprises buffer supports arranged on the lower bracket and hydraulic buffers arranged on the buffer supports.

8. The fixture positioning apparatus of any one of claims 1 to 5, wherein: The buffer mechanism is arranged in multiple, and all the buffer mechanisms are arranged in the same row.

9. The fixture positioning apparatus of any one of claims 1 to 5, wherein: The locking mechanism comprises locking seats and door latch type clamps arranged on the locking seats, and the welding fixture is provided with locking blocks cooperating with the door latch type clamps.

10. The fixture positioning device of claim 9, wherein: The locking mechanism is arranged in two, and all the locking mechanisms are arranged in the same row.

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