Novel modular driving part assembly for robot welding tongs

Abstract

The utility model relates to the technical field of resistance spot welding equipment, and discloses a novel modular driving part assembly for robot welding tongs, which comprises a servo motor, the output end of the servo motor is fixedly connected with a coupler, the servo motor is fixedly connected with a motor mounting flange, the output end of the coupler is fixedly connected with a ball screw, and the ball screw is fixedly connected with a motor mounting flange. A deep groove ball bearing is arranged on the outer wall of the ball screw supporting end, a middle cylinder barrel is arranged on the outer wall of the deep groove ball bearing and fixedly connected with the motor mounting flange, and a ball screw nut is arranged on the outer wall of the ball screw working end. According to the utility model, only x motor mounting flanges, y spindle cylinder barrels and one middle cylinder barrel are needed, so that the problems of various motors and various driving part stroke types are solved, the configuration requirement is simplified, the difficulty of production organization and spare part inventory is reduced, and the variety of single parts is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of resistance spot welding equipment, in particular to a novel modular drive component for robot welding tongs. Background Art

[0002] The drive assembly is a core component of resistance spot welding equipment. Especially for robotic welding tongs, the drive assembly precisely drives the movable electrode to achieve the desired clamp arm opening size. It also ensures the electrode clamps the workpiece and delivers the appropriate welding pressure during the welding process. The drive assembly directly determines the performance, cost, and reliability of robotic welding tongs, and is crucial for ensuring welding quality and efficiency.

[0003] To accommodate different servo motor models, welding tongs, and drive strokes, traditional drive assembly structures require housing designs with varying models and sizes. This means the existing product structure requires x*y different housing configurations. For example, if there are five servo motor models, two welding tongs (C and X), and four drive strokes for each tong type, then 40 different housing configurations are required. This creates significant challenges in production organization and spare parts inventory. Furthermore, the parts require geometric and positional tolerances in multiple locations, which presents significant machining challenges and ultimately leads to high part costs. Utility Model Content

[0004] In order to make up for the above shortcomings, the utility model provides a new modular drive unit assembly for robot welding tongs, which aims to improve the traditional drive unit assembly structure with a large number of shell parts, which brings great difficulties to production organization and spare parts storage. In addition, the parts need to ensure the form and position tolerances of multiple parts, which has certain processing difficulties, resulting in a comprehensive problem of high parts cost.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a new modular drive unit assembly for robot welding tongs, comprising a servo motor, wherein the output end of the servo motor is fixedly connected to a coupling, the servo motor is fixedly connected to a motor mounting flange, the output end of the coupling is fixedly connected to a ball screw, the outer wall of the ball screw support end is provided with a deep groove ball bearing, the outer wall of the deep groove ball bearing is provided with an intermediate cylinder, the intermediate cylinder is fixedly connected to the motor mounting flange, the outer wall of the ball screw working end is provided with a ball screw nut, the outer wall of the ball screw nut is provided with a drive unit output spindle, the outer wall of the drive unit output spindle is provided with a spindle cylinder, the spindle cylinder is fixedly connected to the intermediate cylinder, the motor mounting flange, the intermediate cylinder and the spindle cylinder form a drive unit housing assembly, and the housing assembly is used to splice the servo motor and to splice and protect transmission parts such as the ball screw.

[0006] Furthermore, the outer wall of the coupling is fixedly connected to the inner wall of the intermediate cylinder, the outer wall of the coupling is fixedly connected to the inner wall of the deep groove ball bearing, and the outer wall of the deep groove ball bearing is fixedly connected to the inner wall of the intermediate cylinder.

[0007] Furthermore, the threaded connection between the ball screw nut and the ball screw is used to convert motion into linear motion when the ball screw rotates.

[0008] Furthermore, the main shaft cylinder and the intermediate cylinder are connected by bolts for easy disassembly and assembly.

[0009] Furthermore, the motor mounting flange and the intermediate cylinder are connected by bolts for easy assembly and disassembly.

[0010] Furthermore, the motor mounting flange and the servo motor are connected by bolts for easy assembly and disassembly.

[0011] Furthermore, the output spindle of the driving unit is arranged inside the spindle cylinder, and the spindle cylinder is used to protect the output spindle of the driving unit.

[0012] Furthermore, the intermediate cylinder, the motor mounting flange and the main shaft cylinder form a three-section spliced ​​housing for easy installation and connection.

[0013] The utility model has the following beneficial effects:

[0014] 1. In the present invention, firstly, the configuration can be simplified by splicing the intermediate cylinder, the motor mounting flange and the main spindle cylinder. Only x types of motor mounting flanges, y types of main spindle cylinders and 1 type of intermediate cylinder are required, which solves the problem of multiple motors and multiple drive stroke types, achieves the requirement of simplified configuration, reduces the difficulty of production organization and spare parts inventory, and greatly reduces the number of single product types.

[0015] 2. In the utility model, by splitting the intermediate cylinder, the motor mounting flange and the main shaft cylinder, the volume of raw materials and the processing cost are effectively reduced, and the problem of the integrated shell design in the prior art is solved, in which the diameters of the intermediate cylinder and the main shaft cylinder are usually smaller than the diameter of the motor mounting flange. This achieves a significant reduction in the diameter and volume of raw materials, thereby reducing the processing amount and lowering the raw material cost and processing cost.

[0016] 3. In the present invention, a three-section modular housing structure is formed by an intermediate cylinder, a motor mounting flange and a main spindle cylinder. At the same time, the intermediate cylinder, the motor mounting flange, the main spindle cylinder and the servo motor can be spliced ​​together by bolts, so that they can be processed according to needs, so that most components can be assembled and processed at one time, thereby reducing the processing difficulty and improving the yield rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the three-dimensional structure of a modular drive unit assembly for a new type of robot welding tongs proposed in the present invention;

[0018] Figure 2 This is a schematic structural diagram of the servo motor side of a new modular drive assembly for a robotic welding tongs proposed in the present invention;

[0019] Figure 3 This is a schematic diagram of the internal structure of the output spindle of the drive unit of a new modular drive unit assembly for robot welding tongs proposed in the present invention;

[0020] Figure 4 This is a structural schematic diagram of one side of the motor mounting flange of a modular drive assembly for a new type of robot welding tongs proposed in the present invention.

[0021] Legend:

[0022] 1. Ball screw; 2. Ball screw nut; 3. Servo motor; 4. Drive unit output spindle; 5. Coupling; 6. Deep groove ball bearing; 7. Intermediate cylinder; 8. Motor mounting flange; 9. Spindle cylinder. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] Reference Figure 1 - Figure 4 , the utility model provides an embodiment: a new modular drive unit assembly for robot welding tongs, including a servo motor 3, the output end of the servo motor 3 is fixedly connected to a coupling 5, the servo motor 3 is fixedly connected to a motor mounting flange 8, the output end of the coupling 5 is fixedly connected to a ball screw 1, the outer wall of the supporting end of the ball screw 1 is provided with a deep groove ball bearing 6, the outer wall of the deep groove ball bearing 6 is provided with an intermediate cylinder 7, the intermediate cylinder 7 is fixedly connected to the motor mounting flange 8, the outer wall of the working end of the ball screw 1 is provided with a ball screw nut 2, the outer wall of the ball screw nut 2 is provided with a drive unit output spindle 4, the outer wall of the drive unit output spindle 4 is provided with a spindle cylinder 9, the spindle cylinder 9 is fixedly connected to the intermediate cylinder 7, the motor mounting flange 8, the intermediate cylinder 7, and the spindle cylinder 9 form a drive unit housing assembly, and the housing assembly is used to splice the servo motor 3 and to splice and protect transmission parts such as the ball screw 1;

[0025] Reference Figure 1 - Figure 4 The outer wall of the coupling 5 is fixedly connected to the inner wall of the intermediate cylinder 7, the outer wall of the coupling 5 is fixedly connected to the inner wall of the deep groove ball bearing 6, the outer wall of the deep groove ball bearing 6 is fixedly connected to the inner wall of the intermediate cylinder 7, the threaded connection between the ball screw nut 2 and the ball screw 1 is used to convert the motion into linear motion when the ball screw 1 rotates, the main shaft cylinder 9 and the intermediate cylinder 7 are connected by bolts for easy disassembly and assembly, the motor mounting flange 8 and the intermediate cylinder 7 are connected by bolts for easy disassembly and assembly, the motor mounting flange 8 and the servo motor 3 are connected by bolts for easy disassembly and assembly, the output spindle 4 of the drive unit is arranged inside the spindle cylinder 9, the spindle cylinder 9 is used to protect the output spindle 4 of the drive unit, the intermediate cylinder 7, the motor mounting flange 8 and the main shaft cylinder 9 form a three-section spliced ​​shell for easy installation and connection.

[0026] Working principle: When a modular drive unit assembly for a new type of robot welding tongs is required, the traditional shell parts are changed from a single structure to a three-section splicing structure of an intermediate cylinder 7, a motor mounting flange 8 and a spindle cylinder 9 to achieve modularization. The motor mounting flange 8 is connected to the servo motor 3 in the three-section structure. It is customized according to different motor models. The model and specifications of the coupling 5 also match the output shaft structure size of the servo motor 3. The spindle cylinder 9 is used to support the output spindle 4 of the drive unit. The length is related to the stroke specification of the drive unit, and the installation structure is related to the type of welding tongs. The intermediate cylinder 7 is connected to the motor mounting flange 8 and the spindle cylinder 9, and is used to install the deep groove ball screw. The bearing 6 is connected to the other two parts to form a shell structure. Since the structural dimensions of the input shaft of the ball screw 1 are of a single standard, the intermediate cylinder 7 is a single universal part. The three parts are positioned using a circular boss structure and fastened with screws. The ball screw 1 converts the rotary motion of the output shaft of the servo motor 3 into the linear motion of the ball screw nut 2, and converts the output torque into axial force. Other components include the coupling 6, which connects the output shaft of the servo motor 3 to the ball screw 1, the drive unit output spindle 4, which connects the ball screw nut 2 and the movable electrode assembly of the welding clamp, and the deep groove ball bearing 5 is used to support the rotation or linear motion of the ball screw 1 and the output spindle.

[0027] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A novel modular drive assembly for a robotic welding gun, comprising a servo motor (3), characterized in that: The output end of the servo motor (3) is fixedly connected to a coupling (5), the servo motor (3) is fixedly connected to a motor mounting flange (8), the output end of the coupling (5) is fixedly connected to a ball screw (1), the outer wall of the support end of the ball screw (1) is provided with a deep groove ball bearing (6), the outer wall of the deep groove ball bearing (6) is provided with an intermediate cylinder (7), the intermediate cylinder (7) is fixedly connected to the motor mounting flange (8), and the outer wall of the working end of the ball screw (1) is provided with a A ball screw nut (2), wherein the outer wall of the ball screw nut (2) is provided with a drive unit output spindle (4), the outer wall of the drive unit output spindle (4) is provided with a spindle cylinder (9), the spindle cylinder (9) is fixedly connected to the intermediate cylinder (7), the motor mounting flange (8), the intermediate cylinder (7), and the spindle cylinder (9) form a drive unit housing assembly, and the housing assembly is used to splice the servo motor (3) and splice and protect transmission parts such as the ball screw (1).

2. A novel modular drive assembly for robot welding tongs according to claim 1, characterized in that: The outer wall of the coupling (5) is fixedly connected to the inner wall of the intermediate cylinder (7), the outer wall of the coupling (5) is fixedly connected to the inner wall of the deep groove ball bearing (6), and the outer wall of the deep groove ball bearing (6) is fixedly connected to the inner wall of the intermediate cylinder (7).

3. The novel modular drive assembly for robot welding guns according to claim 1, characterized in that: The threaded connection between the ball screw nut (2) and the ball screw (1) is used to convert motion into linear motion when the ball screw (1) rotates.

4. The novel modular drive assembly for robot welding guns according to claim 1, characterized in that: The main shaft cylinder (9) and the intermediate cylinder (7) are connected via bolts for easy assembly and disassembly.

5. The novel modular drive assembly for robot welding guns according to claim 1, characterized in that: The motor mounting flange (8) and the intermediate cylinder (7) are connected via bolts for easy assembly and disassembly.

6. The novel modular drive assembly for robot welding guns according to claim 1, characterized in that: The motor mounting flange (8) and the servo motor (3) are connected via bolts for easy assembly and disassembly.

7. The novel modular drive assembly for robot welding guns according to claim 1, characterized in that: The drive unit output spindle (4) is arranged inside the spindle cylinder (9), and the spindle cylinder (9) is used to protect the drive unit output spindle (4).

8. The novel modular drive assembly for robot welding guns according to claim 1, characterized in that: The intermediate cylinder (7), the motor mounting flange (8) and the main shaft cylinder (9) form a three-section spliced ​​housing for easy installation and connection.

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