A rotating balance arm
By adding the rotational degree of freedom of the mounting base and the adjustable linkage design to the rotating balance arm, the problems of low operating efficiency and large swing amplitude in the prior art are solved, achieving the effects of efficient and accurate movement of the electric screwdriver and space saving.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 广东速美达科技有限公司
- Filing Date
- 2025-06-27
- Publication Date
- 2026-05-26
AI Technical Summary
Existing rotary balance arms have limited operational efficiency and large swing amplitude due to their limited rotational degrees of freedom, making it difficult to move quickly and accurately to a designated position and requiring a large space to avoid obstacles.
A rotating balance arm comprising a fixed column, a first swing arm, a second swing arm, and a mounting base is designed. The mounting base has three rotational degrees of freedom relative to the fixed column, and the position of the connecting rod can be adjusted through the first clamping seat and the second clamping seat, which increases the swing length adjustment capability. Combined with the encoder to obtain angle information, the position judgment accuracy is improved.
It enables the electric screwdriver to move efficiently and accurately to the designated position, reduces the swing amplitude of the balance arm, improves operating efficiency and space utilization, and enhances the user experience.
Smart Images
Figure CN224274890U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of balance arms, and more particularly to a rotating balance arm. Background Technology
[0002] A balance arm is used to support the object being operated, such as to hold an electric screwdriver, saving operators the physical effort of holding the screwdriver for extended periods. Current technology includes rotating balance arms, which mainly consist of a fixed column, a tension balancer, a swing arm, and a mounting base. The mounting base is primarily used to hold the electric screwdriver. The fixed column, swing arm, and mounting base are sequentially rotatably connected, giving the mounting base two degrees of freedom of rotation relative to the fixed column. This allows the electric screwdriver to drive screws at any point in the plane. The tension balancer applies an upward force to the swing arm to further reduce operator fatigue. However, because the mounting base only has two degrees of freedom of rotation, the swing arm often swings significantly during screwdriver operation. This makes it difficult to move the screwdriver quickly and accurately to a designated position, and requires ample space to avoid the swing arm's large swing amplitude. Therefore, improvements to existing rotating balance arms are needed.
[0003] The above information is provided as background information only to aid in understanding this disclosure and does not constitute an assertion or admission that any of the above content can be used as prior art relative to this disclosure. Utility Model Content
[0004] This utility model provides a rotating balance arm, which mainly solves the technical problems of limited operating efficiency and large swing amplitude caused by the limited rotational freedom of existing rotating balance arms.
[0005] To achieve the above objectives, this utility model provides the following technical solution:
[0006] A rotating balance arm includes a fixed column, a tension balancer, a first swing arm, a second swing arm, and a mounting base;
[0007] One end of the first swing arm is sleeved on the fixed column and can rotate and slide up and down relative to the fixed column. The tension balancer is connected to the fixed column and located above the first swing arm. The tension balancer is connected to the first swing arm and applies an upward tension to the first swing arm.
[0008] The second swing arm includes a first clamping seat, a second clamping seat, and two connecting rods. The two connecting rods extend laterally. The first clamping seat clamps one end of each of the two connecting rods, and the second clamping seat clamps the other end of each of the two connecting rods. The position of at least one of the first clamping seat and the second clamping seat clamping the two connecting rods is adjustable. The first clamping seat is rotatably connected to the end of the first swing arm away from the fixed post. The mounting seat is rotatably connected to the second clamping seat. The mounting seat is used to fix the object to be operated.
[0009] In one of the technical solutions, the rotating balance arm further includes a connecting seat;
[0010] The connecting seat is rotatably connected to the fixed column with the center line of the fixed column as the rotation axis, the tension balancer is fixed on the connecting seat, and the first swing arm is slidably connected to the connecting seat in the longitudinal direction.
[0011] In one of the technical solutions, the connecting seat includes a first rotating block, a second rotating block, and a connecting rod;
[0012] The first rotating block is rotatably connected to the bottom end of the fixed column, the second rotating block is rotatably connected to the top end of the fixed column, the connecting rod is fixedly connected to the first rotating block and the second rotating block respectively, the first swing arm is slidably connected to the connecting rod in the longitudinal direction, and the tension balancer is fixed on the second rotating block.
[0013] In one of the technical solutions, the rotating balance arm further includes a first encoder, which is connected to the fixed column and the second rotating block respectively. The first encoder is used to obtain the angle information of the rotation of the second rotating block relative to the fixed column.
[0014] In one of the technical solutions, the rotating balance arm further includes a second encoder, which is connected to the first swing arm and the first clamping seat respectively. The second encoder is used to obtain the angle information of the rotation of the second swing arm relative to the first swing arm.
[0015] In one of the technical solutions, the rotating balance arm further includes a third encoder, which is connected to the second clamping seat and the mounting seat respectively. The third encoder is used to obtain the angle information of the rotation of the mounting seat relative to the second swing arm.
[0016] In one of the technical solutions, the second rotating block has a tension balancer fixed at each of its opposite ends, and both tension balancers apply an upward tension to the first swing arm.
[0017] In one of the technical solutions, the mounting base includes a first base and a second base. The first base is rotatably connected to the second clamping base, and the second base is rotatably connected to the first base, with the rotation axis of the second base pointing in the lateral direction. The second base is used to fix the object to be operated.
[0018] Compared with the prior art, the rotating balance arm provided by this utility model has at least the following beneficial effects:
[0019] This solution incorporates a first and a second swing arm between the mounting base and the fixed column, granting the mounting base three degrees of rotational freedom relative to the fixed column. This allows for more efficient and accurate movement of the electric screwdriver fixed to the mounting base, while also minimizing the overall swing amplitude of the balance arm and reducing the need for excessive space around it. Furthermore, the second swing arm comprises a first clamping seat, a second clamping seat, and two connecting rods. The first and second clamping seats are designed with at least one adjustable position for clamping the two connecting rods. This allows the balance arm to adjust the swing length of the second swing arm according to the actual operating range, facilitating rapid adaptation to various operating scenarios and ultimately improving the user experience. Attached Figure Description
[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0021] Figure 1 This is a schematic diagram of a rotating balance arm provided in an embodiment of this application.
[0022] Figure label:
[0023] 1. Fixed column; 2. Tension balancer; 3. First swing arm; 4. Second swing arm; 41. First clamping seat; 42. Second clamping seat; 43. Connecting rod; 5. Mounting seat; 51. First base body; 52. Second base body; 6. Connecting seat; 61. First rotating block; 62. Second rotating block; 63. Connecting rod; 7. First encoder; 8. Second encoder; 9. Third encoder; 10. Electric screwdriver. Detailed Implementation
[0024] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.
[0025] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.
[0026] It should be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.
[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.
[0028] 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 accompanying drawings and embodiments.
[0029] Please see Figure 1This utility model embodiment provides a rotating balance arm, which mainly includes a fixed column 1, a tension balancer 2, a first swing arm 3, a second swing arm 4, and a mounting base 5. One end of the first swing arm 3 is sleeved on the fixed column 1 via a connecting linear bearing. Under low speed and light load conditions, the linear bearing can slide up and down along the fixed column 1 and rotate around the center line of the fixed column 1, so that one end of the first swing arm 3 can rotate and slide up and down relative to the fixed column 1. The tension balancer 2 is connected to the fixed column 1 and located above the first swing arm 3. The output end of the tension balancer 2 is connected to the first swing arm 3 to apply an upward tension to the first swing arm 3. The first swing arm 3, the second swing arm 4, and the mounting base 5 are rotatably connected in sequence. The mounting base 5 is used to fix the object to be operated, for example, an electric screwdriver 10 can be fixed on the mounting base 5. Most existing tension balancers 2 have adjustable tension values, which can be adjusted to be equal to the total mass of the first swing arm 3, the second swing arm 4, the mounting base 5, and the electric screwdriver 10, thereby achieving the purpose of saving effort in operating the electric screwdriver.
[0030] Specifically, this solution provides a first swing arm 3 and a second swing arm 4 between the mounting base 5 and the fixed column 1, giving the mounting base 5 three degrees of rotation relative to the fixed column 1. This allows the electric screwdriver 10, which is fixed on the mounting base 5, to move more efficiently and accurately to the designated position. It also reduces the overall swing amplitude of the balance arm, eliminating the need for excessive space around it to avoid the balance arm.
[0031] Please refer to it again. Figure 1 In this embodiment, the second swing arm 4 specifically includes a first clamping seat 41, a second clamping seat 42, and two connecting rods 43. The first clamping seat 41 clamps one end of the two connecting rods 43, and the second clamping seat 42 clamps the other end of the two connecting rods 43. The first clamping seat 41 is rotatably connected to the end of the first swing arm 3 away from the fixed post 1 with axis L1 as the rotation axis. The mounting seat 5 is rotatably connected to the second clamping seat 42 with axis L2 as the rotation axis, so as to realize the function of the second swing arm 4 being rotatably connected to the first swing arm 3 and the mounting seat 5 respectively. Moreover, with the design that both the first clamping seat 41 and the second clamping seat 42 are connected to the connecting rod 43 by clamping, the positions of the first clamping seat 41 and the second clamping seat 42 on the connecting rod 43 can be easily changed. That is, the position of either the first clamping seat 41 or the second clamping seat 42 clamping the connecting rod 43 can be easily adjusted. With this design, the balance arm can adjust the swing length of the second swing arm 4 according to the actual operating range, which is conducive to quickly matching the usage needs of various operating range scenarios, thereby improving the user experience.
[0032] Please refer to it again. Figure 1In this embodiment, the rotating balance arm also includes a connecting seat 6. The connecting seat 6 is rotatably connected to the fixed column 1 with the center line of the fixed column 1 as the rotation axis. The tension balancer 2 is fixed on the connecting seat 6, so that the tension balancer 2 can also rotate around the center line of the fixed column 1. The connecting seat 6 is also connected to the first swing arm 3, so that when the first swing arm 3 rotates relative to the fixed column 1, the tension balancer 2 can rotate synchronously with the first swing arm 3. This solves the problem that the output end (i.e., the pull rope) of the tension balancer 2 gets wrapped around the fixed column 1 when the first swing arm 3 rotates relative to the fixed column 1. That is, it prevents the phenomenon of the first swing arm 3 sliding and getting stuck, and ensures that the tension balancer 2 can stably and reliably provide a constant tension to the first swing arm 3 no matter how the first swing arm 3 rotates. Specifically, the first swing arm 3 is slidably connected to the connecting seat 6 in the longitudinal direction by means of a linear bearing, so that the connecting seat 6 does not hinder the up and down movement of the first swing arm 3.
[0033] Please refer to it again. Figure 1 The rotating balance arm in this embodiment also includes a first encoder 7, a second encoder 8, and a third encoder 9. The first encoder 7 is fixed to the fixed post 1 and connected to the connecting seat 6. The first encoder 7 is used to obtain the rotation angle information of the connecting seat 6, thereby obtaining the rotation angle information of the first swing arm 3. The second encoder 8 is fixed to the first swing arm 3 and connected to the first clamping seat 41. The second encoder 8 is used to obtain the rotation angle information of the second swing arm 4 relative to the first swing arm 3. The third encoder 9 is fixed to the second clamping seat 42 and connected to the mounting seat 5. The third encoder 9 is used to obtain the rotation angle information of the mounting seat 5 relative to the second swing arm 4. By setting the first encoder 7, the second encoder 8, and the third encoder 9, it is beneficial to count the position of the electric screwdriver 10 to determine whether the electric screwdriver 10 has completed the screw-driving operation at all specified positions, thereby helping to solve the problem that operators often miss certain positions during the screw-driving process.
[0034] Please refer to it again. Figure 1To install the first encoder 7, this embodiment specifically designs the connecting seat 6 as including a first rotating block 61, a second rotating block 62, and a connecting rod 63. The first rotating block 61 is rotatably connected to the bottom end of the fixed column 1, and the second rotating block 62 is rotatably connected to the top end of the fixed column 1. The connecting rod 63 is fixedly connected to both the first rotating block 61 and the second rotating block 62. The first swing arm 3 is sleeved on the connecting rod 63 and slidably connected to the connecting rod 63 longitudinally. The first encoder 7 is fixed on the second rotating block 62. The first encoder 7 obtains the rotation angle information of the first swing arm 3 by acquiring the rotation angle information of the second rotating block 62. Preferably, a tension balancer 2 is fixed at each of the opposite ends of the second rotating block 62. The two tension balancers 2 jointly apply an upward pulling force to the first swing arm 3 to improve the stability of the first swing arm 3 during rotational movement and solve the problem of the first swing arm 3 easily jamming due to its long lever arm.
[0035] Please refer to it again. Figure 1 The mounting base 5 is preferably designed to include a first base body 51 and a second base body 52. The first base body 51 is rotatably connected to the second clamping base 42 with axis L2 as the rotation axis. The first base body 51 is rotatably connected to the second base body 52 with axis L3 as the rotation axis. The second base body 52 is used to fix the object to be operated. The axis L3 points in the horizontal direction, so that the electric screwdriver 10 fixed on the second base body 52 has four degrees of freedom of rotation, so that the electric screwdriver 10 can tighten screws vertically downwards and also tighten screws laterally to the side.
[0036] The above are merely preferred embodiments of the present utility model, and only specifically describe the technical principles of the present utility model. These descriptions are only for explaining the principles of the present utility model and should not be construed as limiting the scope of protection of the present utility model in any way. Based on this explanation, any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model, as well as other specific embodiments of the present utility model that can be conceived by those skilled in the art without creative effort, should be included within the scope of protection of the present utility model.
Claims
1. A rotating balance arm, characterized in that, Includes a fixed column, a tension balancer, a first swing arm, a second swing arm, and a mounting base; One end of the first swing arm is sleeved on the fixed column and can rotate and slide up and down relative to the fixed column. The tension balancer is connected to the fixed column and located above the first swing arm. The tension balancer is connected to the first swing arm and applies an upward tension to the first swing arm. The second swing arm includes a first clamping seat, a second clamping seat, and two connecting rods. The two connecting rods extend laterally. The first clamping seat clamps one end of each of the two connecting rods, and the second clamping seat clamps the other end of each of the two connecting rods. The position of at least one of the first clamping seat and the second clamping seat clamping the two connecting rods is adjustable. The first clamping seat is rotatably connected to the end of the first swing arm away from the fixed post. The mounting seat is rotatably connected to the second clamping seat. The mounting seat is used to fix the object to be operated.
2. The rotating balance arm as described in claim 1, characterized in that, The rotary balance arm also includes a connecting seat; The connecting seat is rotatably connected to the fixed column with the center line of the fixed column as the rotation axis, the tension balancer is fixed on the connecting seat, and the first swing arm is slidably connected to the connecting seat in the longitudinal direction.
3. The rotating balance arm as described in claim 2, characterized in that, The connecting seat includes a first rotating block, a second rotating block, and a connecting rod; The first rotating block is rotatably connected to the bottom end of the fixed column, the second rotating block is rotatably connected to the top end of the fixed column, the connecting rod is fixedly connected to the first rotating block and the second rotating block respectively, the first swing arm is slidably connected to the connecting rod in the longitudinal direction, and the tension balancer is fixed on the second rotating block.
4. The rotating balance arm as described in claim 3, characterized in that, The rotating balance arm also includes a first encoder, which is connected to the fixed column and the second rotating block respectively. The first encoder is used to obtain the angle information of the rotation of the second rotating block relative to the fixed column.
5. The rotating balance arm as described in claim 1, characterized in that, The rotating balance arm also includes a second encoder, which is connected to the first swing arm and the first clamping seat respectively. The second encoder is used to obtain the angle information of the rotation of the second swing arm relative to the first swing arm.
6. The rotating balance arm as described in claim 1, characterized in that, The rotating balance arm also includes a third encoder, which is connected to the second clamping seat and the mounting seat respectively. The third encoder is used to obtain the angle information of the rotation of the mounting seat relative to the second swing arm.
7. The rotating balance arm as described in claim 3, characterized in that, The second rotating block has a tension balancer fixed at each of its opposite ends, and both tension balancers apply an upward tension to the first swing arm.
8. The rotating balance arm as described in claim 1, characterized in that, The mounting base includes a first base and a second base. The first base is rotatably connected to the second clamping base, and the second base is rotatably connected to the first base, with the rotation axis of the second base pointing in the lateral direction. The second base is used to fix the object to be operated.