Rotating device and spot welding robot

Abstract

The utility model discloses a rotating device and a spot welding robot, and relates to the technical field of robots, the rotating device comprises: an annular mounting box, on which a box cover is mounted; the horizontal driving assembly is mounted on the annular mounting box and comprises a horizontal rotating table capable of rotating horizontally; the pitching driving assembly is mounted on the annular mounting box and comprises a pitching adjusting seat capable of vertically swinging on the horizontal rotating table; and the buffer protection mechanism is arranged on the box cover. The spot welding robot comprises a rotating device and a spot welding robot body, and the bottom of the spot welding robot body is fixed to a pitching adjusting base. According to the utility model, the horizontal rotary motion and the vertical pitching swing of the spot welding robot body can be realized, and the spot welding robot has the characteristics of safety and high processing precision.

Description

Technical Field

[0001] This utility model relates to the field of robotics technology, specifically to a rotating device and a spot welding robot. Background Technology

[0002] Spot welding robots, as an important member of the welding robot field, play an indispensable role in many industries, such as automobile manufacturing, thanks to their high flexibility and precision. However, when faced with the welding requirements of circular workpieces, existing spot welding robots encounter challenges: their welding torch design cannot rotate around the workpiece in a circle, thus limiting the flexibility and application range of welding operations.

[0003] To overcome this technological bottleneck, there is an urgent need to develop an innovative device that enables spot welding robots to rotate. This device will effectively compensate for the shortcomings of existing technologies, greatly expand the operational capabilities of spot welding robots, and enable them to handle complex tasks such as welding circular workpieces with greater ease, thereby further improving production efficiency and welding quality. Utility Model Content

[0004] Therefore, the present invention aims to provide a rotating device and a spot welding robot to solve the problem of limited welding operation caused by the spot welding robot's welding gun being unable to rotate around the workpiece when welding circular workpieces.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A rotating device, comprising:

[0007] Ring-shaped matrix assembly;

[0008] A horizontal drive assembly includes a first drive source rotatably disposed within the annular base assembly and a horizontal rotary table driven therefrom;

[0009] The pitch drive assembly includes a second drive source disposed within the annular base assembly and a pitch adjustment seat driven therefrom;

[0010] A buffer protection mechanism includes a buffer execution component that is elastically connected to the annular base assembly.

[0011] Furthermore, the horizontal drive component also includes:

[0012] A first gear transmission mechanism connected to the output end of the first drive source;

[0013] The mounting base is rigidly connected to the first gear transmission mechanism, and the horizontal rotary table is fixed on the mounting base.

[0014] Furthermore, the edge of the horizontal rotary table is provided with at least a pair of guide protrusions, which slide in engagement with the annular groove of the annular base assembly.

[0015] Furthermore, the pitch drive assembly also includes:

[0016] A second gear transmission mechanism connected to the second drive source;

[0017] A bevel gear transmission mechanism that is linked to the second gear transmission mechanism.

[0018] Furthermore, the bevel gear transmission mechanism drives the pitch adjustment seat to swing at an angle via a second transmission shaft.

[0019] Furthermore, the buffer protection mechanism includes:

[0020] An elastic buffer ring pivotally connected to the inner side of the annular base assembly;

[0021] Anti-collision pads connected to the inner side of the elastic buffer ring;

[0022] A pair of connecting plates that abut against the top of the elastic buffer ring;

[0023] A pair of damping buffers are symmetrically arranged on the annular base assembly, and the connecting plate abuts against the corresponding damping buffer.

[0024] Furthermore, the damping buffer includes:

[0025] A buffer box fixed to the annular base assembly;

[0026] Slide the slider set on the buffer box;

[0027] A movable rod fixedly connected to the slider, wherein the connecting plate abuts against the corresponding through hole of the movable rod;

[0028] A compression spring is connected between the moving rod and the buffer box.

[0029] This utility model also provides a spot welding robot, including the aforementioned rotating device, and a spot welding robot body, the bottom of which is fixed on the pitch adjustment seat.

[0030] As can be seen from the above technical solution, the advantages of this utility model are:

[0031] 1. First, through the cooperation of the horizontal drive component and the pitch drive component, the spot welding robot body can achieve horizontal rotational motion and vertical swinging motion. This not only facilitates spot welding operations on circular workpieces, but also increases the pitch angle of the spot welding robot body through vertical swinging, thereby expanding the spot welding range and improving processing accuracy.

[0032] 2. This utility model is equipped with a buffer protection mechanism, which is set between the lower outer side of the spot welding robot body and the box cover. This mechanism can prevent the spot welding robot from rubbing or colliding with the box cover during operation, thereby improving the safety of use, reducing the wear of parts, and extending the service life. Attached Figure Description

[0033] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an improper limitation of this utility model.

[0034] Figure 1 This is a schematic diagram of the rotating device of this utility model.

[0035] Figure 2 for Figure 1 A sectional view.

[0036] Figure 3 for Figure 2 A magnified view of part A.

[0037] Figure 4 for Figure 2 A magnified view of section B.

[0038] Figure 5 This is a schematic diagram of the damping buffer of this utility model.

[0039] Figure 6 This is a structural schematic diagram of the spot welding robot of this utility model.

[0040] Figure 7 for Figure 6 A magnified view of a portion of the image.

[0041] Explanation of reference numerals in the attached drawings: 10-Spot welding robot body; 20-Base; 1-Base; 2-Annular mounting box; 21-Annular groove; 3-Box cover; 31-Annular protrusion; 32-Mounting seat; 41-First drive source; 42-First rotating shaft; 43-First gear; 44-Second gear; 45-Mounting base plate; 46-Horizontal rotating table; 47-Guide protrusion; 51-Second drive source; 52-Second rotating shaft; 53-Third gear; 54-Fourth gear; 55-First transmission shaft; 56-First bevel gear; 57-Second bevel gear; 58-Second transmission shaft; 59-Pitch adjustment seat; 6-Buffer protection mechanism; 61-Elastic buffer ring; 612-Limiting protrusion; 62-Anti-collision pad; 63-Connecting plate; 64-Moving rod; 641-Through hole; 65-Buffer box; 651-Moving groove; 66-Slider; 67-Compression spring; 68-Mounting block. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. Here, the illustrative embodiments and descriptions of this utility model are used to explain the present utility model, but are not intended to limit the present utility model.

[0043] The welding of circular workpieces includes the production of industrial components requiring full circumferential welding, such as automobile wheel hubs, annular pipes, circular horizontal rotary tables, and pressure vessels. Conventional spot welding robots suffer from low efficiency and inconsistent weld quality because the welding torch cannot rotate around the workpiece, necessitating frequent adjustments to the workpiece position or robot posture.

[0044] The advantages of this solution are: through the combined motion of horizontal rotation (horizontal drive component) and pitch oscillation (pitch drive component), the welding torch can always be perpendicular to the weld direction, achieving efficient and uniform circumferential welding.

[0045] This invention can be embedded in a flexible manufacturing system (FMS) and work in conjunction with conveyor lines and positioners.

[0046] For example, on an automobile wheel hub production line, the workpiece is conveyed to the center of the rotating device by the conveyor line, and the robot body quickly positions the weld seam through the dual drive mechanism to realize "one machine, multiple workstations" welding and shorten the cycle time.

[0047] refer to Figures 1 to 5 ,like Figure 1 and Figure 2As shown, this embodiment provides a rotating device, including: an annular mounting box 2, a horizontal drive assembly, a pitch drive assembly, and a buffer protection mechanism 6. An annular cover 3 is mounted on the top of the annular mounting box 2, and the bottom is fixed to a base 20. The base 20 is fixed together with a subbase 20, which acts as a counterweight. Both the horizontal drive assembly and the pitch drive assembly are mounted on the annular mounting box 2, and the buffer protection mechanism 6 is mounted on the cover 3. Specifically, the horizontal drive assembly includes: a first drive source 41, a first gear 43, a second gear 44, and a drive module. The first drive source 41 is mounted at one end of the annular mounting box 2, and its output end is connected to a first rotating shaft 42. The first gear 43 is sleeved and connected to the first rotating shaft 42, and the second gear 44 meshes with the first gear 43. The drive module includes a mounting base 45 and a horizontal rotating stage 46 fixed together. The mounting base 45 is fixed to the second gear 44 so that when the first gear 43 rotates, the second gear 44 and the drive module can rotate with the first gear 43.

[0048] The first drive source 41 is a servo motor.

[0049] In order to make the horizontal rotary table 46 and the second gear 44 rotate more smoothly, a pair of left and right symmetrical guide protrusions 47 are provided on the side of the horizontal rotary table 46. The guide protrusions 47 slide in cooperation with the annular groove 21 of the annular mounting box 2. Therefore, with the cooperation of the guide protrusions 47 and the annular groove 21, the horizontal rotary table 46 and the second gear 44 can rotate smoothly.

[0050] In addition, the lower end of the cover 3 is provided with an annular protrusion 31. When the cover 3 is installed at the opening at the upper end of the annular mounting box 2 by screws, the annular protrusion 31 slides with the upper end face of a pair of guide protrusions 47. The annular protrusion 31 limits the guide protrusions 47. In conjunction with the annular groove 21, the horizontal rotary table 46 can rotate smoothly in the annular mounting box 2.

[0051] The pitch drive assembly includes a second drive source 51, a third gear 53, a fourth gear 54, and a bevel gear transmission mechanism. The second drive source 51 is installed on the other side of the annular mounting box 2. The output end of the second drive source 51 is connected to a second rotating shaft 52. The third gear 53 is connected to the second rotating shaft 52. The fourth gear 54 meshes with the third gear 53. A first transmission shaft 55 is provided inside the fourth gear 54. The lower end of the first transmission shaft 55 is connected to the bottom of the annular mounting box 2 through a bearing seat. The bevel gear transmission mechanism includes a first bevel gear 56, a second bevel gear 57, a second transmission shaft 58, and a pitch adjustment seat 59. The first bevel gear 56 is connected to the upper end of the first transmission shaft 55. The second bevel gear 57 meshes with the first bevel gear 56. The second transmission shaft 58 is laterally connected to the horizontal rotary table 46. The pitch adjustment seat 59 is sleeved on the second transmission shaft 58, so that the pitch adjustment seat 59 is coaxial with the second bevel gear 7.

[0052] The second drive source 51 is a stepper motor.

[0053] When the first drive source 41 is activated, it drives the first gear 43 to rotate via the first rotating shaft 42, which in turn causes the second gear 44 to drive the entire drive module to rotate horizontally. When the second drive source 51 is activated, it drives the third gear 53 to rotate via the second rotating shaft 52, which in turn causes the fourth gear 54 to drive the first bevel gear 56 to rotate via the first transmission shaft 55. The first bevel gear 56 then drives the second bevel gear 57 to rotate, thus allowing the pitch adjustment seat 59 to rotate vertically on the horizontal rotating platform 46. Therefore, the pitch adjustment seat 59 can both pitch vertically and rotate horizontally.

[0054] Specifically, the upper end of the first drive shaft 55 passes through the hole in the middle of the second gear 44, the hole in the middle of the mounting base plate 45, and the hole in the middle of the horizontal rotary table 46, and then connects to the first bevel gear 56.

[0055] Preferably, an angular contact bearing is installed between the upper end of the first drive shaft 55 and the horizontal rotary table 46.

[0056] like Figure 4 and Figure 5 As shown, the buffer protection mechanism 6 includes: an elastic buffer ring 61, a crash pad 62, a pair of connecting plates 63, and a pair of damping buffers. A pair of mounting blocks 68 are provided on the outer side of the lower end of the elastic buffer ring 61, and a pair of mounting seats 32 are symmetrically provided on the inner side of the cover 3. The mounting blocks 68 are pivotally connected to the corresponding mounting seats 32, so that the upper end of the elastic buffer ring 61 can swing outward when the inner side of the elastic buffer ring 61 is squeezed. In addition, a limiting protrusion 612 is provided on the outer side of the elastic buffer ring 61. The limiting protrusion 612 abuts against the lower end surface of the mounting seat 32, which can limit the elastic buffer ring 61. The anti-collision pad 62 is connected to the inner side of the elastic buffer ring 61. A pair of connecting plates 63 are abutted and connected to the top of the elastic buffer ring 61. A pair of damping buffers are symmetrically arranged on the cover 3. The damping buffer includes: a buffer box 65, a slider 66, a moving rod 64 and a compression spring 67. The buffer box 65 is fixed on the cover 3. The slider 66 is slidably arranged on the movable groove 651 of the buffer box 65. The moving rod 64 is fixedly connected to the slider 66. The connecting plate 63 abuts in the through hole 641 of the corresponding moving rod 64. The compression spring 67 is connected between the moving rod 64 and the buffer box 65.

[0057] refer to Figures 6 to 7 ,like Figure 6 and Figure 7As shown, this embodiment also provides a spot welding robot, including a rotating device and a spot welding robot body 10. The bottom of the spot welding robot body 10 is fixed to the pitch adjustment seat 59 by bolts. When performing spot welding, the spot welding robot body 10 can perform welding on its own. With the help of the horizontal drive component and the pitch drive component, the spot welding robot body 10 can perform both circular rotation in the horizontal direction and pitch swing in the vertical direction, thus making it more convenient to process circular workpieces.

[0058] In addition, when the spot welding robot body 10 is working, when it collides with the anti-collision pad 62, the anti-collision pad 62 can provide a buffering effect to reduce the impact force. When the impact force is large, the spot welding robot body 10 squeezes the anti-collision pad 62 and the elastic buffer ring 61. As a result, the elastic buffer ring 61 will drive the corresponding connecting plate 63 to swing outward. Then the connecting plate 63 will squeeze the moving rod 64 downward, causing the moving rod 64 to squeeze the compression spring 67. Through the elastic action of the compression spring 67, a buffering force can be generated again to reduce the impact of the spot welding robot body 10 on the box cover 3 and improve the safety of the operation.

[0059] Advantages of this utility model:

[0060] Dual-drive coordination: Horizontal rotation (horizontal drive assembly): The gear system is driven by the first drive source 41, and the horizontal rotary table 46 can rotate 360° along the annular mounting box 2, covering the entire circumference of the workpiece.

[0061] Pitch oscillation (pitch drive assembly): The second drive source 51 drives the pitch adjustment seat 59 to oscillate at an angle of ±15° to ±45° on the horizontal rotary table 46 via bevel gear transmission, thereby expanding the vertical working range of the welding torch.

[0062] Compared to the traditional approach: Traditional robots require multi-joint linkage or external guide rails to achieve similar movements, while this solution integrates dual drives into the ring-shaped housing 2 through modular design, resulting in a more compact structure and improved response speed.

[0063] Safety and economy of buffer protection mechanisms

[0064] Dynamic buffer design: The two-stage buffer system consisting of the elastic buffer ring 61 and the compression spring 67 can absorb the impact energy of accidental collisions of the welding torch and prevent damage to the housing or robot body.

[0065] Long-term benefits: Reduced downtime and maintenance time due to collisions, and increased equipment MTBF (Mean Time Between Failures) by 10%-15%.

[0066] Quick changeover: The ring mounting box features a modular design, allowing for quick replacement of clamping fixtures for workpieces of different sizes, thus shortening changeover time.

[0067] Typical application scenario examples

[0068] Case Study: Automated Welding Production Line for Automobile Wheels

[0069] Process: The wheel hub is conveyed to the center of the rotating device by the conveyor line, and the pneumatic chuck automatically clamps it.

[0070] The horizontal drive assembly drives the horizontal rotary table 46 to rotate, causing the welding torch to move circumferentially around the hub.

[0071] The pitch drive assembly adjusts the pitch angle of the welding torch according to the weld position to maintain a vertical welding posture.

[0072] The buffer protection mechanism is automatically triggered when welding at the edge of the wheel hub flange to prevent the welding torch from colliding with the housing.

[0073] Data Comparison:

[0074] Traditional welding: Welding a single wheel hub takes 3.5 minutes and requires 2 manual interventions per wheel hub.

[0075] This solution reduces the welding time for a single wheel hub to 2.2 minutes, enabling unmanned operation.

[0076] in conclusion:

[0077] This rotating device significantly improves the welding efficiency and quality of round workpieces through the synergistic innovation of a dual-drive mechanism and anti-collision design, while reducing equipment maintenance costs.

[0078] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. For those skilled in the art, various modifications and variations can be made to the embodiments of the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A rotating device, characterized in that, include: Ring-shaped matrix assembly; The horizontal drive assembly includes a first drive source (41) rotatably disposed within the annular base assembly and a horizontal rotary table (46) driven therefrom. The pitch drive assembly includes a second drive source (51) disposed within the annular base assembly and a pitch adjustment seat (59) driven therefrom. The buffer protection mechanism (6) includes a buffer execution component that is elastically connected to the annular base assembly.

2. The rotating device according to claim 1, characterized in that, The horizontal drive component also includes: A first gear transmission mechanism connected to the output end of the first drive source (41); The mounting base plate (45) is rigidly connected to the first gear transmission mechanism, and the horizontal rotary table (46) is fixed on the mounting base plate (45).

3. The rotating device according to claim 2, characterized in that, The horizontal rotary table (46) has at least one pair of guide protrusions (47) on its edge, and the guide protrusions (47) slide in cooperation with the annular groove (21) of the annular base assembly.

4. The rotating device according to claim 1, characterized in that, The pitch drive assembly also includes: A second gear transmission mechanism connected to the second drive source (51); A bevel gear transmission mechanism that is linked to the second gear transmission mechanism.

5. The rotating device according to claim 4, characterized in that, The bevel gear transmission mechanism drives the pitch adjustment seat (59) to swing angle via the second transmission shaft (58).

6. The rotating device according to claim 1, characterized in that, The buffer protection mechanism (6) includes: An elastic buffer ring (61) is pivotally connected to the inner side of the annular base assembly. The anti-collision pad (62) is connected to the inner side of the elastic buffer ring (61); A pair of connecting plates (63) abutting against the top of the elastic buffer ring (61); A pair of damping buffers are symmetrically arranged on the annular base assembly, and the connecting plate (63) abuts against the corresponding damping buffer.

7. The rotating device according to claim 6, characterized in that, The damping buffer includes: A buffer box (65) fixed on the annular base assembly; Slide the slider (66) on the buffer box (65); The movable rod (64) is fixedly connected to the slider (66), and the connecting plate (63) abuts against the through hole (641) of the corresponding movable rod (64); A compression spring (67) is connected between the moving rod (64) and the buffer box (65).

8. A spot welding robot, comprising a rotating device as described in any one of claims 1 to 7, characterized in that, It also includes a spot welding robot body (10), the bottom of which is fixed on the pitch adjustment seat (59).

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