A flexible mobile tightening machine assembly trolley

Abstract

This utility model discloses a flexible mobile tightening machine assembly trolley, including a mobile trolley with a column fixedly installed on it. A horizontal swing arm that swings horizontally in a plane perpendicular to the column is rotatably mounted on the column. A vertical swing arm that swings horizontally and has an adjustable inclination in a vertical plane is rotatably mounted at the front end of the horizontal swing arm. The vertical plane is perpendicular to the horizontal plane. A reaction arm is rotatably mounted at the front end of the vertical swing arm, with its rotation axis perpendicular to the horizontal plane. A tightening tool (such as a tightening machine) is clamped on the reaction arm. This utility model integrates a tightening machine and a folding robotic arm onto a mobile trolley, forming a mobile flexible assembly workstation. It meets the needs of application scenarios with many varieties, low frequency, and small quantities, such as trial assembly of new models and rework of mass-produced models; the maximum torque of the assembled bolts is <220Nm.

Description

Technical Field

[0001] This utility model relates to the field of automobile manufacturing, specifically a flexible mobile tightening machine assembly trolley. Background Technology

[0002] In the automotive manufacturing sector, the trial assembly of new models, the rework of mass-produced models, and the assembly of vehicle bodies and components, chassis assembly, and engine assembly are generally characterized by a wide variety of products, low frequency of operations, and small quantities per operation. These characteristics place high demands on the flexibility and adaptability of assembly equipment, requiring the equipment to quickly respond to the assembly needs of different models and components, and to be easily adjusted and switched. However, the widely used traditional fixed-station assembly robotic arms were originally designed to meet the operational needs of high-volume, standardized vehicle assembly production. These robotic arms are typically fixed to a specific workstation, with a relatively fixed operating range and motion flow, making it difficult to quickly adapt to assembly scenarios involving multiple product types and small batches. When faced with frequent process changes during the trial assembly of new models, or the diverse fault handling needs during the rework of mass-produced models, traditional fixed-station assembly robotic arms often cannot meet the requirements for flexible adjustment, thus to some extent restricting the improvement of assembly efficiency and production flexibility. Utility Model Content

[0003] Therefore, in order to overcome the above-mentioned shortcomings, this utility model provides a flexible mobile tightening machine assembly trolley, which integrates a tightening machine and a folding robotic arm onto a mobile trolley to form a mobile flexible assembly workstation, thereby improving the work efficiency of workers and being suitable for quickly adapting to assembly scenarios with multiple varieties and small batches.

[0004] Specifically, a flexible mobile tightening machine assembly trolley includes a mobile trolley with a column fixedly installed on it. A horizontal swing arm that swings in a horizontal plane perpendicular to the column is rotatably mounted on the column. A vertical swing arm that swings in a horizontal plane and has an adjustable inclination in a vertical plane is rotatably mounted at the front end of the horizontal swing arm. The vertical plane is perpendicular to the horizontal plane. A reaction arm that rotates at the front end of the vertical swing arm has its axis of rotation perpendicular to the horizontal plane. A tightening tool (such as a tightening machine) is clamped on the reaction arm.

[0005] Optionally, a brake is provided at the rotatable connection between the column and the horizontal swing arm. A brake is provided at the rotational connection between the horizontal swing arm and the vertical swing arm.

[0006] Optionally, the vertical swing arm includes a support arm and a telescopic cylinder. One end of the support arm is rotatably connected to the reaction arm via a first connecting part, and the other end is rotatably connected to the horizontal swing arm via a second connecting part. The two ends of the support arm are respectively rotatably connected to the first connecting part and the second connecting part via pins. A connecting lug is provided on one side of the support arm. The cylinder body of the telescopic cylinder is hinged to the second connecting part, and the end of the telescopic rod of the telescopic cylinder is hinged to the lug.

[0007] Optionally, the reaction arm is connected to the first connecting part via a rotary bearing, and a brake acting on the reaction arm is installed on the first connecting part.

[0008] Optionally, the second connecting part is rotatably connected to the horizontal swing arm via a bearing.

[0009] Optionally, rotation limiters are provided at both ends of the horizontal swing arm.

[0010] Optionally, the platform of the mobile trolley is provided with a sleeve placement block, in which sleeves of different specifications adapted to tightening tools are placed.

[0011] This utility model has the following advantages: This utility model is a flexible mobile tightening machine assembly trolley, which integrates a tightening machine and a folding robotic arm onto a mobile trolley to form a mobile flexible assembly workstation. It meets the needs of application scenarios with many varieties, low frequency, and small quantities, such as trial assembly of new models and rework of mass-produced models; the maximum torque for assembling bolts is <220Nm.

[0012] By designing horizontal and vertical swing arms, the position of the tightening tool can be adjusted in the vertical and horizontal directions, so that the operator can move the tightening tool to the designated position to tighten the bolts. Furthermore, a brake is set at the connection of the swing arms to lock the position of the swing arms, so as to tighten the screws more effectively. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the assembly trolley of the flexible mobile tightening machine described in this utility model; Figure 2 This is a schematic diagram of the flexible mobile tightening machine assembly trolley from another perspective; Figure 3 This is a schematic diagram showing the connection between the horizontal swing arm and the vertical swing arm of this utility model; Figure 4 This is a schematic diagram of the structure of the vertical swing arm described in this utility model; Figure 5 This is a schematic diagram showing the connection between the guard plate and the screw. In the diagram: 100, moving trolley; 101, sleeve placement block; 200, column; 300, horizontal swing arm; 301, protrusion; 400, vertical swing arm; 401, support arm; 4011, lug; 4012, guard plate; 4013, following groove; 402, telescopic cylinder; 403, first connecting part; 404, second connecting part; 500, reaction arm; 600, tightening tool; 700, brake. Detailed Implementation

[0014] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0015] In this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, without necessarily requiring or implying any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0016] As described in the background section, in the automotive manufacturing field, the trial assembly of new models, the rework of mass-produced models, and the assembly of vehicle bodies and parts, chassis assembly, and engine assembly are generally characterized by a wide variety of products, low frequency of operations, and small quantity per operation. These characteristics place high demands on the flexibility and adaptability of assembly equipment, requiring the equipment to quickly respond to the assembly needs of different models and different parts, and to make convenient adjustments and switches. However, the widely used traditional fixed-station assembly robotic arms were originally designed to meet the operational needs of high-volume, standardized vehicle assembly production. These robotic arms are typically fixed to a specific workstation, with a relatively fixed operating range and motion flow, making it difficult to quickly adapt to assembly scenarios involving multiple product types and small batches. When faced with frequent process changes during the trial assembly of new models, or the diverse fault handling needs during the rework of mass-produced models, traditional fixed-station assembly robotic arms often cannot meet the requirements for flexible adjustment, thus to some extent restricting the improvement of assembly efficiency and production flexibility.

[0017] Based on the above issues, such as Figures 1-5As shown, this embodiment provides a flexible mobile tightening machine assembly trolley, including a mobile trolley 100. A column 200 is fixedly installed on the mobile trolley 100. A horizontal swing arm 300 that swings in a horizontal plane is rotatably installed on the column 200. The horizontal plane is a plane perpendicular to the column. A vertical swing arm 400 that swings in a horizontal plane and has an adjustable inclination in a vertical plane is rotatably installed at the front end of the horizontal swing arm 300. The vertical plane is a plane perpendicular to the horizontal plane. A reaction arm 500 is rotatably installed at the front end of the vertical swing arm 400. The rotation axis of the reaction arm 500 is perpendicular to the horizontal plane. A tightening tool 600 (such as a tightening machine) is clamped on the reaction arm.

[0018] The aforementioned technical features integrate a tightening machine and a folding robotic arm onto a mobile trolley, forming a mobile flexible assembly workstation for bolt loading and unloading. This meets the needs of application scenarios with a large variety of products, low frequency, and small quantities, such as trial assembly of new models and rework of mass-produced models. The maximum torque for assembling bolts is <220 Nm. In use, the operator pushes and locks the mobile trolley to the designated position (the trolley is equipped with braked rollers), and pulls the tightening tool to the designated position. During this process, the horizontal swing arm can rotate horizontally, changing the horizontal position of the tightening tool. The vertical swing arm is adjustable in the vertical direction, changing the vertical position of the tightening tool. The horizontal and vertical swing arms support the tightening tool in the designated position for easy bolt loading and unloading.

[0019] To fix the moving positions of the horizontal and vertical swing arms, in one embodiment, a brake 700 is provided at the rotatable connection between the column 100 and the horizontal swing arm 300, and a brake 700 is provided at the rotatable connection between the horizontal swing arm 300 and the vertical swing arm 400. For example, the brake is a disc clutch, including a fixed disc and an electromagnetic actuator. When the electromagnetic actuator is engaged with the fixed disc, braking is achieved, and rotation is locked. When the electromagnetic actuator is disengaged from the fixed disc, rotation is achieved.

[0020] The aforementioned technical features enable the locking of the positions of the horizontal and vertical swing arms, facilitating the installation and removal of screws by workers in designated areas.

[0021] To prevent the horizontal and vertical swing arms from rotating too much in the horizontal plane, in one embodiment, rotation limiting members are provided at both ends of the horizontal swing arm. For example, the limiting block includes two protrusions 301 fixed to the horizontal swing arm, and a fixing strip fixed to the other end of the horizontal swing arm that rotates relative to it (such as a column or the second connecting part described below). The two protrusions have a certain included angle, and the fixing strip is located within the included angle. When the horizontal or vertical swing arm rotates to one side, the protrusion contacts the fixing strip to achieve limiting. When it rotates to the other side, the fixing strip contacts the limiting block on the other side to achieve limiting on the other side.

[0022] The aforementioned technical features can limit the rotation angle of the horizontal and vertical swing arms in the horizontal plane, reducing the risk of excessive rotation angles causing them to collide with other objects (such as the engine being assembled).

[0023] To improve the support of the vertical swing arm, in one embodiment, the vertical swing arm 400 includes a support arm 401 and a telescopic cylinder 402. One end of the support arm 401 is rotatably connected to the reaction arm 500 via the first connecting part 403, and the other end is rotatably connected to the horizontal swing arm via the second connecting part 404. The two ends of the support arm 401 are respectively rotatably connected to the first connecting part and the second connecting part via pins. A connecting lug 4011 is provided on one side of the support arm. The cylinder body of the telescopic cylinder 402 is hinged to the second connecting part 404, and the end of the telescopic rod of the telescopic cylinder 402 is hinged to the lug 4011.

[0024] The reaction arm 500 is connected to the first connecting part 40 via a rotary bearing. A brake 700 (which is an existing electromagnetic clutch, including a drive block, a clutch plate and a fixed plate, wherein the drive block drives the clutch plate to contact or separate from the fixed plate, thereby achieving engagement / disengagement) is installed on the first connecting part.

[0025] The second connecting part 404 is rotatably connected to the horizontal swing arm 300 via a bearing.

[0026] The aforementioned technical features enable adjustment of the vertical swing arm's tilt angle. By extending the telescopic cylinder's telescopic rod, the vertical swing arm can tilt upwards to increase the height of the tightening tool. Conversely, when the telescopic rod is retracted, the vertical swing arm can tilt downwards to reduce the height of the tightening tool.

[0027] For example, in order to improve the strength of the support arm, a guard plate 4012 is provided at both ends of the lower part of the support arm. A screw 4013 is connected between the two guard plates 4012. The guard plates at both ends are hinged to the first connecting part and the second connecting part, respectively. The guard plates are movably connected to the support arm. In order to avoid interference or separation between the guard plate and the support arm when rotating, an arc-shaped following groove 4013 is provided on the guard plate. A protruding rod matching the following groove is provided on the support arm. The arc of the following groove is the same as the movement trajectory of the guard plate when it follows the rotation of the support arm.

[0028] To facilitate the replacement of different sizes of sleeves by staff, in one embodiment, the platform of the mobile trolley 100 is provided with a sleeve placement block 101, in which sleeves of different sizes that are compatible with tightening tools are placed.

[0029] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A flexible mobile power tumbler assembly cart, characterized by: The device includes a mobile trolley, on which a column is fixedly mounted. A horizontal swing arm that swings in a horizontal plane perpendicular to the column is rotatably mounted on the column. A vertical swing arm that swings in a horizontal plane and whose inclination in a vertical plane is adjustable is rotatably mounted at the front end of the horizontal swing arm. The vertical plane is perpendicular to the horizontal plane. A reaction arm that rotates at the front end of the vertical swing arm has its axis of rotation perpendicular to the horizontal plane. A tightening tool is clamped on the reaction arm.

2. The flexible mobile screw machine assembly cart of claim 1, wherein: A brake is installed at the rotatable connection between the column and the horizontal swing arm. A brake is provided at the rotational connection between the horizontal swing arm and the vertical swing arm.

3. The flexible mobile tightening machine assembly trolley according to claim 1, characterized in that: The vertical swing arm includes a support arm and a telescopic cylinder. One end of the support arm is rotatably connected to the reaction arm via a first connecting part, and the other end is rotatably connected to the horizontal swing arm via a second connecting part. The two ends of the support arm are respectively rotatably connected to the first connecting part and the second connecting part via pins. A connecting lug is provided on one side of the support arm. The cylinder body of the telescopic cylinder is hinged to the second connecting part, and the end of the telescopic rod of the telescopic cylinder is hinged to the lug.

4. The flexible mobile tightening machine assembly trolley according to claim 3, characterized in that: The reaction arm is connected to the first connecting part via a rotary bearing, and a brake acting on the reaction arm is installed on the first connecting part.

5. The flexible mobile tightening machine assembly trolley according to claim 3, characterized in that: The second connecting part is rotatably connected to the horizontal swing arm via a bearing.

6. The flexible mobile tightening machine assembly trolley according to claim 1, characterized in that: Rotation limiters are provided at both ends of the horizontal swing arm.

7. A flexible mobile tightening machine assembly trolley according to any one of claims 1-6, characterized in that: The platform of the mobile trolley is equipped with a sleeve placement block, in which sleeves of different sizes that are compatible with tightening tools are placed.

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