A push-pull type balance arm

Abstract

This utility model discloses a push-pull type balance arm, including a fixed column, a rotating slide, a tension balancer, and a push-pull assembly. The tension balancer is connected to the fixed column and located above the rotating slide, and the tension balancer is connected to the rotating slide and applies an upward tension to the rotating slide. The rotating slide includes a first linear bearing, a first clamping seat, a second clamping seat, a second linear bearing, and a third linear bearing. The first linear bearing is sleeved on the fixed column, the first clamping seat simultaneously clamps the first linear bearing and the second linear bearing, the second clamping seat simultaneously clamps the first linear bearing and the third linear bearing, the second linear bearing and the third linear bearing are arranged longitudinally at intervals and both extend laterally, and the push-pull assembly is used to fix the object to be operated, and the push-pull assembly is slidably connected to the second linear bearing and the third linear bearing laterally.

Description

Technical Field

[0001] This utility model relates to the technical field of balance arms, and in particular to a push-pull type balance arm. Background Technology

[0002] A balance arm is used to support objects to be operated, such as fixing an electric screwdriver, to save workers the physical effort of holding the screwdriver for extended periods. Current technology includes push-pull type balance arms, which mainly consist of a fixed column, a rotating slide, a tension balance arm, and a push-pull assembly. The tension balance arm is connected to the fixed column and located above the rotating slide, pulling the rotating slide upwards. The push-pull assembly is fixed to the rotating slide and slides laterally relative to it. The rotating slide, in turn, can move up and down and rotate laterally relative to the fixed column, giving the push-pull assembly multiple degrees of freedom, including lateral rotation, lateral extension and retraction, and vertical movement. In use, the electric screwdriver is simply fixed to the push-pull assembly, and the tension balancer lifts the screwdriver, saving workers the effort of operating it. The screwdriver, with its multiple degrees of freedom, can then tighten screws at any position on a plane. Specifically, the existing rotary slide has a relatively complex structure, making it difficult to assemble and resulting in a large total weight of the rotary slide and push-pull assembly. In addition, most existing rotary slides are connected to the push-pull assembly by a slider. Due to the long length of the push-pull assembly and the large total mass of the push-pull assembly and the rotary slide, the slider is prone to sliding unevenly or even jamming when the push-pull assembly is subjected to the weight of an electric screwdriver. This seriously affects the user experience. Therefore, it is necessary to improve the existing push-pull type balance arm.

[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 push-pull type balance arm, which mainly solves the technical problems of existing push-pull type balance arms having complex structures that are inconvenient to assemble and having uneven sliding during the push-pull process.

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

[0006] A push-pull type balance arm includes a fixed column, a rotating slide, a tension balancer, and a push-pull assembly;

[0007] The tension balancer is connected to the fixed column and located above the rotating slide, and the tension balancer is connected to the rotating slide and applies an upward tension to the rotating slide;

[0008] The rotary slide includes a first linear bearing, a first clamping seat, a second clamping seat, a second linear bearing, and a third linear bearing; the first linear bearing is sleeved on the fixed column, the first clamping seat simultaneously clamps the first linear bearing and the second linear bearing, the second clamping seat simultaneously clamps the first linear bearing and the third linear bearing, the second linear bearing and the third linear bearing are arranged longitudinally at intervals and both extend laterally, the push-pull assembly is used to fix the object to be operated, and the push-pull assembly is slidably connected to the second linear bearing and the third linear bearing laterally.

[0009] In one of the technical solutions, the push-pull assembly includes a first guide rod, a second guide rod, a first fixing block, and a second fixing block;

[0010] The first fixing block is connected to one end of the first guide rod and one end of the second guide rod, and the second fixing block is connected to the other end of the first guide rod and the second guide rod. The first guide rod passes through the second linear bearing, and the second guide rod passes through the third linear bearing.

[0011] In one of the technical solutions, the push-pull type balance arm further includes a mounting base and a connecting base;

[0012] The mounting base is located above the rotating slide and is rotatably connected to the fixed column. The tension balancer is fixed on the mounting base. The connecting base is connected between the mounting base and the rotating slide, so that the mounting base can rotate synchronously when the rotating slide rotates relative to the fixed column.

[0013] The rotary slide also includes a third clamping seat, which clamps the second linear bearing or the third linear bearing, and the third clamping seat is slidably connected to the connecting seat in the longitudinal direction.

[0014] In one of the technical solutions, the connecting seat includes a first rotating block, a second rotating block, and a connecting rod;

[0015] 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, and a fourth linear bearing is provided in the third clamping seat, and the fourth linear bearing is sleeved on the connecting rod;

[0016] The push-pull type balance arm also includes a first encoder and a second encoder. The first encoder is connected to the fixed column and the second rotating block respectively and is used to obtain the rotation angle information of the second rotating block. The second encoder is fixed on the rotating slide and connected to the push-pull assembly. The second encoder is used to obtain the position information of the push-pull assembly when it moves laterally.

[0017] In one of the technical solutions, the second encoder is fixed to the third clamping seat and connected to the first fixing block or the second fixing block.

[0018] In one of the technical solutions, the push-pull type balance arm further includes a third encoder, which is fixedly connected to the second rotating block, and the output end of the third encoder is connected to the rotating slide.

[0019] In one of the technical solutions, the push-pull type balance arm further includes a first limiting block and a second limiting block, both of which are sleeved on the fixed column. The first limiting block is located above the mounting base, and the second limiting block is located below the mounting base.

[0020] In one of the technical solutions, the rotary slide further includes a connecting piece, which is fixedly connected to the first clamping seat and the second clamping seat respectively, and the output end of the tension balancer is hooked onto the connecting piece.

[0021] Compared with the prior art, the push-pull type balance arm provided by this utility model has at least the following beneficial effects:

[0022] The rotary slide design of this scheme includes a first linear bearing, a first clamping seat, a second clamping seat, a second linear bearing, and a third linear bearing. When installing the rotary slide, simply clamp the first and second clamping seats onto the first linear bearing, then clamp the second linear bearing onto the first clamping seat, and finally clamp the third linear bearing onto the second clamping seat. Finally, mount the first linear bearing onto the fixed column. Under low-speed, light-load conditions, the first linear bearing can slide up and down along the fixed column and rotate around it, thus realizing the basic functions of the push-pull assembly's vertical movement and rotation. This scheme utilizes a clamping fixing method to quickly assemble the rotary slide. Furthermore, the design of the push-pull assembly slidingly connected to the longitudinally spaced second and third linear bearings improves the smoothness of the lateral sliding of the push-pull assembly. The rotary slide of this scheme has advantages such as simpler structure, lighter weight, easier assembly, and improved stability of the lateral sliding of the push-pull assembly. Attached Figure Description

[0023] 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.

[0024] Figure 1 This is a schematic diagram of a push-pull type balance arm provided in an embodiment of this application;

[0025] Figure 2 An exploded view of the structure of a push-pull type balance arm provided in an embodiment of this application;

[0026] Figure 3 This is a schematic diagram of the structure of the rotary slide provided in the embodiment of this application.

[0027] Figure label:

[0028] 1. Fixed column; 11. First limiting block; 12. Second limiting block; 2. Rotary slide; 21. First linear bearing; 22. First clamping seat; 23. Second clamping seat; 24. Second linear bearing; 25. Third linear bearing; 26. Third clamping seat; 27. Connecting piece; 3. Tension balancer; 4. Push-pull assembly; 41. First guide rod; 42. Second guide rod; 43. First fixed block; 44. Second fixed block; 5. Mounting seat; 6. Connecting seat; 61. First rotating block; 62. Second rotating block; 63. Connecting rod; 7. First encoder; 8. Second encoder; 9. Third encoder. Detailed Implementation

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] Please refer to the following: Figures 1 to 3 This utility model embodiment provides a push-pull type balance arm, which mainly includes a fixed column 1, a rotating slide 2, a tension balancer 3, and a push-pull assembly 4. The rotating slide 2 can slide up and down along the fixed column 1 and rotate around the central axis of the fixed column 1. The tension balancer 3 is connected to the fixed column 1 and located above the rotating slide 2. The tension balancer 3 is connected to the rotating slide 2 and applies an upward tension force to the rotating slide 2. The push-pull assembly 4 is slidably connected to the rotating slide 2 in a horizontal direction. The push-pull assembly 4 is used to fix the object to be operated (such as an electric screwdriver). Through the above design, the push-pull assembly 4 can have multiple degrees of freedom, including up and down movement, rotational movement, and horizontal pushing and pulling, so that the electric screwdriver fixed on the push-pull assembly 4 can perform screw-driving operations at any position on a plane. Currently, the tension value of the existing tension balancer 3 is mostly adjustable. Its tension value can be adjusted to be equal to the total mass of the rotating slide 2, the push-pull assembly 4, and the electric screwdriver, thereby achieving the purpose of saving effort in operating the electric screwdriver.

[0035] Please refer to them again. Figures 1 to 3The rotary slide 2 specifically includes a first linear bearing 21, a first clamping seat 22, a second clamping seat 23, a second linear bearing 24, and a third linear bearing 25. The first linear bearing 21 is sleeved on the fixed post 1. The first clamping seat 22 clamps the first linear bearing 21 and the second linear bearing 24 simultaneously. The second clamping seat 23 clamps the first linear bearing 21 and the third linear bearing 25 simultaneously. The second linear bearing 24 and the third linear bearing 25 are arranged longitudinally at intervals and both extend laterally. The push-pull assembly 4 is slidably connected to the second linear bearing 24 and the third linear bearing 25 laterally. Specifically, by adopting the above design for the rotary slide 2, when installing the rotary slide 2, it is only necessary to pre-clamp the first clamping seat 22 and the second clamping seat 23 on the first linear bearing 21, then clamp the second linear bearing 24 on the first clamping seat 22, and clamp the third linear bearing 25 on the second clamping seat 23. Finally, the first linear bearing 21 is sleeved on the fixed column 1. Under low-speed and light-load operating conditions, the first linear bearing 21 can slide up and down along the fixed column 1 and rotate around the fixed column 1 to realize the basic functions of the push-pull assembly 4 being able to move up and down and rotate. This solution can quickly complete the assembly of the rotary slide 2 by using a clamping fixation method. Moreover, the design of the push-pull assembly 4 slidingly connected to the longitudinally spaced second linear bearing 24 and third linear bearing 25 can improve the smoothness of the lateral sliding of the push-pull assembly 4. The rotary slide 2 of this solution has the advantages of simpler structure, lighter weight, easier assembly, and improved stability of the lateral sliding of the push-pull assembly 4.

[0036] Please refer to them again. Figures 1 to 3 Based on the specific structural design of the rotary slide 2 described above, the push-pull assembly 4 of this embodiment specifically includes a first guide rod 41, a second guide rod 42, a first fixing block 43, and a second fixing block 44. The first fixing block 43 connects to one end of the first guide rod 41 and the second guide rod 42, respectively, and the second fixing block 44 connects to the other end of the first guide rod 41 and the second guide rod 42. The first guide rod 41 passes through the second linear bearing 24, and the second guide rod 42 passes through the third linear bearing 25. By adopting the rotary slide 2 described above, the corresponding push-pull assembly 4 is lighter and easier to slide laterally with the rotary slide 2. In fact, the first fixing block 43 or the second fixing block 44 is used to fix the object to be operated.

[0037] Please refer to them again. Figures 1 to 3The push-pull type balance arm in this embodiment also includes a mounting base 5 and a connecting base 6. The mounting base 5 is located above the rotating slide 2 and is rotatably connected to the fixed column 1 via a connecting rotating bearing. The aforementioned tension balancer 3 is fixed on this mounting base 5. The connecting base 6 is connected between the mounting base 5 and the rotating slide 2, so that when the rotating slide 2 rotates relative to the fixed column 1, the mounting base 5 can rotate synchronously with the rotating slide 2. This solves the problem that the output end (i.e., the pull rope) of the tension balancer 3 gets wrapped around the fixed column 1 when the rotating slide 2 rotates relative to the fixed column 1. That is, it prevents the rotating slide 2 from sliding up and down and getting stuck, and ensures that the tension balancer 3 can stably and reliably provide a constant tension to the rotating slide 2 no matter how the rotating slide 2 rotates. In addition, the rotating slide 2 also includes a third clamping base 26, which clamps the second linear bearing 24 or the third linear bearing 25. The third clamping base 26 is slidably connected to the connecting base 6 in the longitudinal direction, so that the connecting base 6 does not hinder the up and down movement of the rotating slide 2.

[0038] Please see Figure 1 The fixed column 1 is fitted with a first limiting block 11 and a second limiting block 12, which are longitudinally adjustable. The first limiting block 11 is located above the mounting base 5, and the second limiting block 12 is located below the mounting base 5. The first limiting block 11 and the second limiting block 12 together restrict the position of the mounting base 5, so that the tension balancer 3 can only rotate around the fixed column 1 and cannot move up and down. Preferably, the rotary slide 2 also includes a connecting piece 27, which is fixedly connected to the first clamping base 22 and the second clamping base 23 respectively to improve the rigidity of the overall structure of the rotary slide 2. The output end of the tension balancer 3 is hooked on this connecting piece 27, so that the tension balancer 3 can apply an upward pulling force to the entire rotary slide 2.

[0039] Please refer to them again. Figures 1 to 3The push-pull type balance arm in this embodiment also includes a first encoder 7 and a second encoder 8. The first encoder 7 is fixed on the fixed column 1 and directly or indirectly connected to the rotary slide 2. The first encoder 7 is used to acquire the rotation angle information of the rotary slide 2. The second encoder 8 is fixed on the rotary slide 2 and connected to the push-pull assembly 4. The second encoder 8 is used to acquire the position information of the lateral movement of the push-pull assembly 4. By setting the first encoder 7 and the second encoder 8, it is beneficial to statistically analyze the position of the electric screwdriver to determine whether the electric screwdriver 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. In addition, the push-pull type balance arm may also include a third encoder 9. The third encoder 9 is relatively fixed to the tension balancer 3 and its output end is connected to the rotary slide 2. The third encoder 9 is used to acquire the position information of the longitudinal movement of the rotary slide 2, which is beneficial to more accurately determine whether the electric screwdriver has completed the screw-driving operation at all specified positions. In fact, the first encoder 7 is a rotary encoder, and the second encoder 8 and the third encoder 9 are both tension encoders with telescopic ropes.

[0040] Please refer to them again. Figures 1 to 3 To 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 post 1, the second rotating block 62 is rotatably connected to the top end of the fixed post 1, and the connecting rod 63 is fixedly connected to both the first rotating block 61 and the second rotating block 62. A fourth linear bearing is provided within the aforementioned third clamping seat 26, and this fourth linear bearing is sleeved on the connecting rod 63 to achieve a longitudinal sliding connection between the connecting seat 6 and the rotating slide 2. The first encoder 7 is fixed to the second rotating block 62. Preferably, the second encoder 8 is fixed to the third clamping seat 26 and connected to the first fixed block 43 or the second fixed block 44. Preferably, the third encoder 9 is also fixed to the second rotating block 62.

[0041] 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 push-pull counterbalance arm, characterized by, Includes a fixed column, a rotating slide, a tension balancer, and a push-pull assembly; The tension balancer is connected to the fixed column and located above the rotating slide, and the tension balancer is connected to the rotating slide and applies an upward tension to the rotating slide; The rotary slide includes a first linear bearing, a first clamping seat, a second clamping seat, a second linear bearing, and a third linear bearing; the first linear bearing is sleeved on the fixed column, the first clamping seat simultaneously clamps the first linear bearing and the second linear bearing, the second clamping seat simultaneously clamps the first linear bearing and the third linear bearing, the second linear bearing and the third linear bearing are arranged longitudinally at intervals and both extend laterally, the push-pull assembly is used to fix the object to be operated, and the push-pull assembly is slidably connected to the second linear bearing and the third linear bearing laterally.

2. The push-pull counterbalance arm of claim 1, wherein, The push-pull assembly includes a first guide rod, a second guide rod, a first fixing block, and a second fixing block; The first fixing block is connected to one end of the first guide rod and one end of the second guide rod, and the second fixing block is connected to the other end of the first guide rod and the second guide rod. The first guide rod passes through the second linear bearing, and the second guide rod passes through the third linear bearing.

3. The push-pull counterbalance arm of claim 2, wherein, The push-pull type balance arm also includes a mounting base and a connecting base; The mounting base is located above the rotating slide and is rotatably connected to the fixed column. The tension balancer is fixed on the mounting base. The connecting base is connected between the mounting base and the rotating slide, so that the mounting base can rotate synchronously when the rotating slide rotates relative to the fixed column. The rotary slide also includes a third clamping seat, which clamps the second linear bearing or the third linear bearing, and the third clamping seat is slidably connected to the connecting seat in the longitudinal direction.

4. The push-pull counterbalance arm of claim 3, wherein, 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, and a fourth linear bearing is provided in the third clamping seat, and the fourth linear bearing is sleeved on the connecting rod; The push-pull type balance arm also includes a first encoder and a second encoder. The first encoder is connected to the fixed column and the second rotating block respectively and is used to obtain the rotation angle information of the second rotating block. The second encoder is fixed on the rotating slide and connected to the push-pull assembly. The second encoder is used to obtain the position information of the push-pull assembly when it moves laterally.

5. The push-pull counterbalance arm of claim 4, wherein, The second encoder is fixed to the third clamping seat and connected to the first fixing block or the second fixing block.

6. The push-pull counterbalance arm of claim 4, wherein, The push-pull type balance arm also includes a third encoder, which is fixedly connected to the second rotating block, and the output end of the third encoder is connected to the rotating slide.

7. The push-pull counterbalance arm of claim 3, wherein, The push-pull type balance arm also includes a first limiting block and a second limiting block, both of which are sleeved on the fixed column. The first limiting block is located above the mounting base, and the second limiting block is located below the mounting base.

8. The push-pull counterbalance arm of claim 1, wherein, The rotating slide also includes a connecting piece, which is fixedly connected to the first clamping seat and the second clamping seat respectively, and the output end of the tension balancer is hooked onto the connecting piece.

Images