A type of floor-mounted robotic arm

Abstract

This utility model discloses a floor-mounted robotic arm, including a column fixed to a foundation. A first swing arm is rotatably mounted on the column via a rotating component, and a second swing arm is rotatably mounted on the front end of the first swing arm via the same rotating component. A telescopic arm is vertically downward mounted on the front end of the second swing arm, and a tool (an electric wrench matched to a screw on a workpiece) is connected to the lower end of the telescopic arm. This utility model enables the suspension of tools (such as electric wrenches) to allow workers to control the tools in multiple directions and positions, improving the efficiency of screw installation during the assembly of automobile engines and transmissions. Suspending the tool using two swing arms and a telescopic cylinder reduces the labor intensity of workers.

Description

Technical Field

[0001] This utility model relates to assembly tools in automobile engine assembly workshops, specifically a floor-mounted robotic arm. Background Technology

[0002] In the assembly of automobile engines and transmissions, tightening screws is a crucial and frequently repeated process. Currently, tightening screws or applying preload usually requires the assistance of tools such as specialized electric wrenches. However, these tools themselves have a certain weight, and with frequent repetitive operations, they significantly increase the labor intensity of workers, not only reducing assembly efficiency but also potentially causing physical fatigue or even injury to workers over long periods.

[0003] To alleviate this problem, existing technologies often employ the method of suspending tools with ropes. While this method allows workers to avoid constantly holding tools and reduces labor intensity to some extent, it still has significant drawbacks. When the assembly process involves changes in height, workers still need to manually lift the tools, overcoming their weight. For highly repetitive assembly processes, this still places a considerable labor burden on workers, failing to fundamentally achieve the goal of reducing labor intensity and improving assembly efficiency. Utility Model Content

[0004] Therefore, to address the aforementioned shortcomings, this utility model provides a floor-mounted robotic arm that suspends tools (such as electric wrenches) to allow workers to control the tools in multiple directions and positions, thereby improving the efficiency of screw installation during the assembly of automobile engines and transmissions. Utilizing two swing arms and a telescopic cylinder to suspend the tools reduces the labor intensity of the workers.

[0005] Specifically, a ground-mounted robotic arm includes a column fixed to a foundation, a first swing arm rotatably mounted on the column via a rotating component, and a second swing arm rotatably mounted on the front end of the first swing arm via a rotating component.

[0006] A telescopic arm is vertically mounted downward at the front end of the second swing arm, and a tool (an electric wrench that matches the screws on the workpiece) is connected to the lower end of the telescopic arm.

[0007] Optionally, the telescopic arm includes a telescopic cylinder and an optical axis, the telescopic cylinder being connected to the second swing arm, and the optical axis being connected to the telescopic rod of the telescopic cylinder.

[0008] Optionally, the second swing arm is provided with a cantilever parallel to the telescopic arm, and the cantilever is vertically mounted with a sliding part, which slides in cooperation with the optical axis.

[0009] Optionally, the sliding part includes a sleeve and a linear bearing installed in the sleeve, the linear bearing being matched with the optical axis.

[0010] Optionally, the rotating component includes a base, a rotating rod, a cylinder, and a drive body.

[0011] The rotating rod is rotatably mounted on the base via a bearing. The cylinder is fixedly connected to the base. The driving body is located inside the cylinder and reciprocates under electromagnetic or electric action. The end of the driving body has a clutch plate that engages with a contact part. The contact part is connected to the rotating rod or is part of the rotating rod.

[0012] The two ends of the first swing arm are connected to the base via rotating rods. One end of the base is connected to the column via a clamp, and the other end of the base is connected to the second swing arm.

[0013] Optionally, the first swing arm, the second swing arm, and the telescopic arm are all provided with wiring through-pieces.

[0014] This utility model has the following advantages:

[0015] This invention enables the suspension of tools (such as electric wrenches) so that workers can control the tools in multiple directions and positions, thereby improving the efficiency of installing screws during the assembly of automobile engines and transmissions.

[0016] Suspension is achieved by using a telescopic cylinder to provide upward pulling force to the tool. The telescopic cylinder is dynamically controlled; when the worker moves the tool upward, the telescopic rod of the cylinder retracts, and when the worker moves the tool downward, the telescopic rod extends. During this process, the worker only needs a small amount of force to control the tool's up and down movement, achieving "zero-gravity suspension." Compared to traditional rope suspension, the worker no longer needs to overcome the tool's weight when moving it upward, making operation much easier. This is especially beneficial for processes where the tool is moved up and down frequently (such as the many screws of different heights during the assembly of car engines and transmissions). With traditional suspension methods, workers experience arm pain after a period of operation, while the above-mentioned technical features reduce the worker's labor and make the up and down movement of the tool much easier. Attached Figure Description

[0017] Figure 1 This is a diagram showing the usage state of the floor-mounted robotic arm described in this utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the floor-mounted robotic arm described in this utility model;

[0019] Figure 3 This is a schematic diagram of the floor-mounted robotic arm described in this utility model from another perspective;

[0020] Figure 4 This is a partial schematic diagram of the floor-mounted robotic arm described in this utility model;

[0021] Figure 5 This is a schematic diagram of the connection between the first swing arm and the second swing arm of this utility model;

[0022] Figure 6 This is a front view schematic diagram of the rotating component described in this utility model;

[0023] Figure 7 yes Figure 6 Sectional view of AA;

[0024] In the diagram: 100, column; 200, first swing arm; 201, wiring through part; 300, second swing arm; 400, telescopic arm; 401, telescopic cylinder; 402, optical axis; 600, cantilever; 601, sliding part; 700, rotating part; 701, cylinder body; 702, drive body; 703, drive body; 704, clutch plate; 705, contact part; 706, seat; 707, rotating rod; 800, tool; 900, assembly line. Detailed Implementation

[0025] 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.

[0026] 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.

[0027] As described in the background section, while using ropes to suspend tools can reduce labor intensity to some extent by eliminating the need for workers to constantly hold the tools, it still has significant drawbacks. When changes in height are involved in the assembly process, workers still need to manually lift the tools, overcoming their weight. For highly repetitive assembly processes, this still places a considerable labor burden on workers, failing to fundamentally achieve the goal of reducing labor intensity and improving assembly efficiency.

[0028] Based on the above problems, this embodiment provides a ground-mounted robotic arm, including a column 100 fixed to the foundation, a first swing arm 200 rotatably mounted on the column 100 via a rotating member 700, and a second swing arm 300 rotatably mounted on the front end of the first swing arm 200 via the rotating member 700.

[0029] A telescopic arm 400 is vertically mounted downward at the front end of the second swing arm 300, and a tool 800 is connected to the lower end of the telescopic arm. The tool is an electric wrench that matches the screws on the workpiece being processed.

[0030] The aforementioned technical features enable the suspension of tools (such as electric wrenches) to allow workers to control the tools in multiple directions and positions, improving the efficiency of screw installation during the assembly of automobile engines and transmissions. In use, the floor-mounted robotic arm is installed next to assembly line 900, and workers use the suspended tools to assemble workpieces 901 (automobile engines and transmissions) on the assembly line (such as installing and tightening screws).

[0031] To achieve "zero-gravity suspension" of the tool (when the tool moves up or down, the upward pulling force on the tool is equal to the weight of the workpiece), in one embodiment, the telescopic arm 400 includes a telescopic cylinder 401 and an optical axis 402. The telescopic cylinder 401 is connected to the second swing arm 300, and the optical axis 402 is connected to the telescopic rod of the telescopic cylinder.

[0032] The aforementioned technical features utilize a telescopic cylinder to provide upward tension to the tool, achieving suspension. This telescopic cylinder is dynamically controlled; when the operator moves the tool upwards, the telescopic cylinder's extension rod retracts, and when moving the tool downwards, it extends. During this process, the operator requires only minimal force to control the tool's vertical movement, achieving "zero-gravity suspension." Compared to traditional rope suspension, operators no longer need to overcome the tool's weight when moving it upwards, making operation much easier. This is particularly beneficial for processes involving frequent tool movement (such as the assembly of screws of varying heights in car engines and transmissions). With traditional suspension methods, operators experience arm pain after prolonged use, while this technical feature reduces labor intensity and makes tool movement much easier.

[0033] To balance the torque received by the tool when tightening screws, in one embodiment, the second swing arm 300 is provided with a cantilever 600 parallel to the telescopic arm. The cantilever is vertically mounted with a sliding portion 601, which slides in cooperation with the optical axis. The sliding portion includes a sleeve and a linear bearing installed within the sleeve, the linear bearing matching the optical axis.

[0034] The aforementioned technical features, through the cantilever with a sliding part, can overcome the torque experienced by the tool when tightening screws. Compared to traditional rope suspension (where the tool does not rotate with the screw when suspended by rope, it is manually controlled by the worker, resulting in high labor intensity, especially in repetitive processes as mentioned above), the tool is easier for workers to use, experiences less reaction force, and has lower labor intensity in repetitive processes.

[0035] When workers use tools to tighten screws, after determining the work position, they generally need to fix the position of the first swing arm and / or the second swing arm; based on this issue, such as Figure 6 and Figure 7 As shown, in one embodiment, the rotating member 700 includes a base 706, a rotating rod 707, a cylinder 701, and a drive body 702.

[0036] The rotating rod 707 is rotatably mounted on the base 706 via bearings. The cylinder 701 is fixedly connected to the base 706. The driving body 702 is located inside the cylinder 701 and reciprocates under electromagnetic or electric action. A clutch plate 704 is located at the end of the driving body 703. This clutch plate 704 engages with a contact portion 705. The contact portion is connected to the rotating rod or is part of the rotating rod. During braking, the driving body, under electromagnetic or electric action, causes the clutch plate to disengage from or separate from the contact portion. When the clutch plate disengages from the contact portion, braking is achieved (i.e., the first or second swing arm stops rotating relative to the rotating rod). When the clutch plate separates from the contact portion, transfer is achieved (i.e., the first or second swing arm can rotate relative to the rotating rod).

[0037] The two ends of the first swing arm are connected to the base via rotating rods. One end of the base is connected to the column via a clamp, and the other end of the base is connected to the second swing arm.

[0038] To facilitate the fixing or suspension of the robotic arm's cables, in one embodiment, the first swing arm, the second swing arm, and the telescopic arm are all provided with cable penetration members 201; the cable penetration members facilitate the workers' cable routing and prevent the cable routing from becoming messy and affecting the work.

[0039] 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 floor based robotic arm comprising a column fixed to a ground base, characterised in that: The first swing arm is rotatably installed on the column by a rotating member, and the second swing arm is rotatably installed on the front end of the first swing arm by a rotating member; A telescopic arm is vertically downwardly installed on the front end of the second swing arm, and a tool is connected to the lower end of the telescopic arm; The telescopic arm comprises a telescopic cylinder and an optical shaft, the telescopic cylinder is connected to the second swing arm, and the optical shaft is connected to the telescopic rod of the telescopic cylinder.

2. The floor-based robotic arm of claim 1, wherein: The second swing arm is provided with a cantilever parallel to the telescopic arm, and a sliding part is vertically installed on the cantilever and is in sliding fit with the optical shaft.

3. The floor-based robotic arm of claim 2, wherein: The sliding part comprises a sleeve and a linear bearing installed in the sleeve, and the linear bearing is matched with the optical shaft.

4. The floor-based robotic arm of claim 1, wherein: The rotating member comprises a seat body, a rotating rod, a cylinder body and a driving body, The rotating rod is rotatably installed on the seat body by a bearing, the cylinder body is fixedly connected to the seat body, the driving body reciprocates in the cylinder body under the action of electromagnetism or electricity, and a clutch plate is arranged at the end of the driving body and is matched with a contact part, the contact part is connected to the rotating rod or is a part of the rotating rod; The two ends of the first swing arm are respectively connected to the seat body by rotating rods, one end of the seat body is connected to the column by a hoop, and the other end of the seat body is connected to the second swing arm.

5. The floor-based robotic arm of any one of claims 1-4, wherein: The first swing arm, the second swing arm and the telescopic arm are all provided with line penetrating members.

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