Lifting support vertical arm rotating structure

Abstract

The utility model relates to a lifting support vertical arm rotating structure which comprises a vertical arm and a base, the lower end of the vertical arm is fixedly provided with a connecting base in rotating fit with the base, the base is provided with a driving mechanism for driving the connecting base to rotate, and the connecting base is provided with a rotating overload protection mechanism matched with the driving mechanism. Corner limiting mechanisms matched with each other are arranged between the connecting seat and the base. The rotating structure is beneficial for preventing the motor from being damaged under the condition that the rotation of the vertical arm is blocked.

Description

Technical Field

[0001] The utility model relates to a rotating structure of a vertical arm of a lifting bracket. Background Art

[0002] As a supporting component for articles such as monitors and whiteboards, in order to meet the needs of users, a structure has emerged in which the vertical arm of a lifting bracket is rotated by an electric mechanism. However, the existing lifting brackets with electric rotation functions do not have a rotation overload function. It is easy to occur that after the rotation of the vertical arm is blocked by an article, the electric mechanism continues to output power, resulting in damage to the motor; or damage to the motor mechanism caused by manual rotation. Content of the Utility Model

[0003] The purpose of the utility model is to provide a rotating structure of a vertical arm of a lifting bracket, which helps to prevent the occurrence of motor damage when the rotation of the vertical arm is blocked.

[0004] The technical solution of the utility model lies in: a rotating structure of a vertical arm of a lifting bracket, including a vertical arm and a base. A connecting seat rotatably matched with the base is fixed at the lower end of the vertical arm. A driving mechanism for driving the connecting seat to rotate is arranged on the base. A rotation overload protection mechanism matched with the driving mechanism is arranged on the connecting seat. A corner limit mechanism matched with each other is arranged between the connecting seat and the base.

[0005] Further, an installation through hole is arranged on the base. A first annular plate and a second annular plate sleeved on the lower part of the connecting seat are correspondingly installed on the upper and lower side faces of the installation through hole. A fixing pressing plate connected to the connecting seat by bolts is arranged on the lower side of the second annular plate.

[0006] Further, positioning holes are arranged at intervals on the periphery of the installation through hole on the base. Positioning columns matched with the positioning holes are arranged on both the first annular plate and the second annular plate. Annular grooves are arranged on the upper end face of the first annular plate and the lower end face of the second annular plate.

[0007] Further, the driving mechanism includes a reduction gear set installed on the base and driven by a motor. A driven gear disc meshed with the output gear of the reduction gear set and used for driving the connecting seat to rotate is installed on the connecting seat.

[0008] Further, the rotation overload protection mechanism includes a driven gear disc. The driven gear disc is sleeved on the connecting seat and has a rotational damping between it and the vertical arm after being pre-tightened by a pressing component. A pre-tightening force adjusting structure is arranged on the pressing component.

[0009] Further, the pressing assembly includes an upper pressing plate and a third annular plate sleeved on the connecting seat and located on the upper and lower sides of the driven gear disc, and an annular bearing plate fixedly connected to the connecting seat is arranged on the lower side of the third annular plate.

[0010] Further, the pre-tightening force adjusting structure includes vertical threaded holes arranged at intervals in the circumferential direction on the connecting seat, and a set screw for cooperating with the upper pressing plate is screwed in the vertical threaded holes.

[0011] Further, the upper part of the connecting seat has an annular flange, positioning recesses and positioning holes are arranged at intervals on the bottom surface of the annular flange, and positioning convex parts and positioning columns are correspondingly arranged on the upper end surface of the upper pressing plate; the pre-tightening force adjusting structure is arranged at the position where the positioning convex part is located.

[0012] Further, the rotation angle limiting mechanism includes a pair of inverted L-shaped limiting plates fixedly arranged on the connecting seat at intervals, the included angle between the pair of inverted L-shaped limiting plates is less than 120°, and a pair of touch switches are installed on the base between the rotation paths of the pair of inverted L-shaped limiting plates.

[0013] Further, a key panel and a voice control module are arranged on the base.

[0014] Compared with the prior art, the utility model has the following advantages:

[0015] 1. The rotation structure helps to prevent the motor from being damaged when the rotation of the vertical arm is blocked.

[0016] 2. The pressing assembly is connected and positioned with the connecting seat to prevent the upper pressing plate and the third annular plate from rotating with the driven gear disc during the rotation of the driven gear disc. At the same time, the pre-tightening force between the driven gear disc and the connecting seat can be conveniently adjusted by the set screw, and the size of the rotation damping can be adjusted.

[0017] 3. By arranging the voice control module on the base, it helps to adjust the rotation angle of the vertical arm through voice control instructions. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of the utility model;

[0019] Figure 2 is a structural diagram of the connection between the connecting seat and the base of the utility model;

[0020] Figure 3 is a sectional view of the connection between the vertical arm and the base of the utility model;

[0021] Figure 4 is of the utility model Figure 2 exploded schematic diagram;

[0022] In the figure: 100 - vertical arm; 110 - connecting seat; 111 - first connecting part; 112 - second connecting part; 113 - vertical threaded hole; 114 - set screw for adjustment; 115 - positioning recess; 116 - inverted L-shaped limiting plate; 120 - driven gear disc; 130 - upper pressure plate; 131 - annular flange part; 132 - positioning convex part; 133 - positioning column; 140 - third annular plate; 141 - positioning column; 150 - annular bearing pressure plate; 151 - positioning hole; 200 - base; 201 - installation through hole; 202 - positioning hole; 203 - motor; 204 - reduction gear set; 205 - touch switch; 206 - button panel; 207 - voice control module; 208 - connecting end; 210 - first annular plate; 211 - positioning column; 220 - second annular plate; 221 - positioning column; 230 - fixed pressure plate. Specific implementation mode

[0023] To make the above features and advantages of the present utility model more understandable, specific embodiments are hereinafter given and described in detail in conjunction with the accompanying drawings, but the present utility model is not limited thereto.

[0024] Reference Figures 1 to 4

[0025] A rotation structure for the vertical arm of a lifting bracket includes a vertical arm 100 for installing a display screen or a whiteboard and a base 200. A connecting seat 110 that is rotationally matched with the base is fixed at the lower end of the vertical arm. A driving mechanism for driving the connecting seat to rotate is provided on the base, and a rotation overload protection mechanism that is matched with the driving mechanism is provided on the connecting seat, which helps prevent the motor from being burned out due to overload; a corner limit mechanism that is matched with each other is provided between the connecting seat and the base to control the rotation angle of the vertical arm.

[0026] In this embodiment, an installation through hole 201 is provided on the base. The first annular plate 210 and the second annular plate 220 are correspondingly installed on the upper and lower side surfaces of the installation through hole. The lower part of the installation seat is provided with a first connecting part 111 that penetrates into the installation through hole. The first annular plate and the second annular plate are sleeved on the first connecting part, and the inner circle of the first annular plate is provided with a downward convex annular flange. A fixed pressure plate 230 that is connected to the connecting seat by bolts is provided below the second annular plate. Thus, the rotational connection between the base and the connecting seat is realized.

[0027] In this embodiment, positioning holes 202 are provided at intervals around the installation through hole on the base. Positioning columns 211 and positioning columns 221 that are matched with the positioning holes are provided on both the first annular plate and the second annular plate. Annular grooves are provided on the upper end surface of the first annular plate and the lower end surface of the second annular plate to reduce the friction during rotation.

[0028] In this embodiment, the driving mechanism includes a reduction gear set 204 installed on the base and driven by a motor 203. A driven gear disc 120 that meshes with the output gear of the reduction gear set and is used to drive the connecting seat to rotate is installed on the connecting seat, so as to drive the connecting seat and the vertical arm to rotate through the driven gear disc.

[0029] In this embodiment, the rotation overload protection mechanism includes a driven gear disc 120. The driven gear disc is sleeved on the first connecting portion of the connecting seat and has a rotational damping between it and the vertical arm after being pre-tightened by a pressing component. When devices such as a display installed on the vertical arm are blocked, causing the vertical arm to be unable to rotate, and the motor continues to rotate, the reduction gear set will drive the driven gear disc to rotate around the connecting seat by overcoming the rotational damping, preventing the motor from being burned out due to overload or the like. Or when manually rotating the vertical arm, when the force applied to the vertical arm is greater than 50 KN, the connecting seat rotates around the driven gear disc, while the driven gear disc does not rotate, preventing the driven gear disc from driving the motor to rotate through the reduction gear set and causing the motor to burn out.

[0030] In this embodiment, a second connecting portion 112 with a diameter larger than that of the first connecting portion is provided on the connecting seat; the pressing component includes an upper pressing plate 130 and a third annular plate 140 that are sleeved on the second connecting portion of the connecting seat and are located on the upper and lower sides of the driven gear disc. An annular bearing plate 150 fixedly connected to the connecting seat by a vertical screw is provided on the lower side of the third annular plate. The annular bearing plate is located on the upper side of the first annular plate and is in frictional cooperation with the first annular plate.

[0031] In this embodiment, positioning holes 151 are spaced on the annular bearing plate, and positioning posts 141 that cooperate with the positioning holes on the annular bearing plate are provided on the third annular plate to prevent the third annular plate from rotating with the driven gear disc. An annular flange portion 131 located inside the third annular plate and the driven gear disc is provided on the inner circle of the upper pressing plate to prevent the connecting seat from being worn when the driven gear disc rotates.

[0032] In this embodiment, a pre-tightening force adjusting structure is provided on the pressing component. Specifically, the pre-tightening force adjusting structure includes vertical threaded holes 113 spaced along the circumferential direction on the connecting seat. A set screw 114 for cooperating with the upper pressing plate is screwed into the vertical threaded holes, so as to adjust the set screw to adjust the pre-tightening force of the driven gear disc.

[0033] In this embodiment, the upper part of the connecting seat has an annular flange. The upper pressure plate, the third annular plate, and the driven gear disc are located on the lower side of the annular flange. The end face of the upper pressure plate is in contact with the bottom surface of the annular flange. The bottom surface of the annular flange is provided with positioning recesses 115 and positioning holes at intervals. The upper end face of the upper pressure plate is correspondingly provided with positioning protrusions 132 that cooperate with the positioning recesses and positioning columns 133 that cooperate with the positioning holes, thereby preventing the upper pressure plate from rotating with the gear disc. The pre-tightening force adjusting structure is arranged at the position where the positioning protrusions are located, so that the tightening adjusting screw applies a pre-tightening force by abutting against the positioning protrusions.

[0034] In this embodiment, in order to control the rotation angle of the vertical arm, the rotation angle limiting mechanism includes a pair of inverted L-shaped limiting plates 116 fixedly arranged on the connecting seat at intervals. The included angle between the pair of inverted L-shaped limiting plates is less than 120°. A pair of touch switches 205 are installed on the base between the rotation paths of the pair of inverted L-shaped limiting plates. The inverted L-shaped limiting plates and the touch switches are arranged on the side away from the motor. The touch switches are connected to the control module, so that when the inverted L-shaped limiting plate touches one of the touch switches, the motor is controlled to stop rotating.

[0035] In this embodiment, a key panel 206 and a voice control module 207 connected to the control module are arranged on the base, so as to control the rotation of the vertical arm through the key or the voice control module. A connection end 208 of the power supply wire is also arranged at the rear end of the base.

[0036] If terms such as "first" and "second" are used in the above text of the present utility model to limit components, those skilled in the art should understand that the use of "first" and "second" is only for the convenience of differentiating components in description. Unless otherwise stated, the above terms have no special meaning.

[0037] If the present utility model discloses or involves components or structural members that are fixedly connected to each other, then, unless otherwise stated, the fixed connection can be understood as: a detachable fixed connection (for example, connected by bolts or screws), or it can also be understood as: a non-detachable fixed connection (for example, riveting, welding). Of course, the mutual fixed connection can also be replaced by an integral structure (for example, manufactured by integral casting process) (except for obvious cases where integral forming process cannot be used).

[0038] In addition, unless otherwise stated, the terms used to represent the positional relationship or shape in any technical solution disclosed in the above present utility model include states or shapes that are approximate, similar, or close to it.

[0039] Any component provided by the present utility model can either be assembled from multiple separate components or be a single component manufactured by an integral forming process.

[0040] The above are only the preferred embodiments of the present utility model, and all equivalent changes and modifications made according to the scope of the patent application of the present utility model shall fall within the scope covered by the present utility model.

Claims

1. A vertical arm rotating structure of a lifting bracket, comprising a vertical arm and a base. A connecting seat that is rotatably matched with the base is fixed to the lower end of the vertical arm. It is characterized in that A driving mechanism for driving the connecting seat to rotate is provided on the base, a rotation overload protection mechanism cooperating with the driving mechanism is provided on the connecting seat, and a corner limit mechanism cooperating with each other is provided between the connecting seat and the base.

2. The vertical arm rotation structure of the lifting bracket according to claim 1, wherein An installation through-hole is provided on the base, and a first annular plate and a second annular plate sleeved on the lower part of the connecting seat are correspondingly installed on the upper and lower side faces of the installation through-hole, and a fixed pressing plate connected to the connecting seat by bolts is provided on the lower side of the second annular plate.

3. The vertical arm rotation structure of the lifting bracket according to claim 2, wherein, Positioning holes are spacedly provided on the base around the installation through-hole, positioning columns cooperating with the positioning holes are provided on both the first annular plate and the second annular plate, and annular grooves are provided on the upper end face of the first annular plate and the lower end face of the second annular plate.

4. The vertical arm rotation structure of the lifting bracket according to claim 1, characterized in that The driving mechanism includes a reduction gear set installed on the base and driven by a motor, and a driven gear disc engaged with the output gear of the reduction gear set and used to drive the connecting seat to rotate is installed on the connecting seat.

5. The vertical arm rotating structure of the lifting bracket according to claim 1, 2, 3 or 4, characterized in that, The rotation overload protection mechanism includes a driven gear disc, the driven gear disc is sleeved on the connecting seat and has a rotational damping with the vertical arm after being pre-tightened by a pressing component, and a pre-tightening force adjusting structure is provided on the pressing component.

6. The vertical arm rotation structure of the lifting bracket according to claim 5, characterized in that The pressing component includes an upper pressing plate and a third annular plate sleeved on the connecting seat and located on the upper and lower sides of the driven gear disc, and an annular bearing plate fixedly connected to the connecting seat is provided on the lower side of the third annular plate.

7. The vertical arm rotation structure of the lifting bracket according to claim 6, wherein The pre-tightening force adjusting structure includes vertical threaded holes spacedly provided on the connecting seat in the circumferential direction, and set screws for cooperating with the upper pressing plate are screwed in the vertical threaded holes.

8. The vertical arm rotation structure of the lifting bracket according to claim 6 or 7, characterized in that, The upper part of the connecting seat has an annular flange, positioning recesses and positioning holes are spacedly provided on the bottom surface of the annular flange, and positioning protrusions and positioning columns are correspondingly provided on the upper end face of the upper pressing plate; the pre-tightening force adjusting structure is arranged at the position where the positioning protrusions are located.

9. The vertical arm rotation structure of the lifting bracket according to claim 1, 2, 3, 6 or 7, characterized in that, The corner limit mechanism includes a pair of inverted L-shaped limit plates fixedly spaced on the connecting seat, the included angle between the pair of inverted L-shaped limit plates is less than 120°, and a pair of touch switches are installed on the base between the rotation paths of the pair of inverted L-shaped limit plates.

10. The vertical arm rotation structure of the lifting bracket according to claim 1, wherein A key panel and a voice control module are provided on the base.

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