Electrically powered support pole

Abstract

This invention discloses an electric support rod. The bottom boss of the support rod nut undergoes axial elastic deformation due to the conical surface of the countersunk hole in the screw end cap, reducing the threaded clearance between the support rod nut and the screw. This reduces the radial force acting on the screw, thus creating a clamping braking force on the screw from the bottom boss of the support rod nut. The bottom boss, screw, screw end cap, and screw end cap retaining ring constitute the braking device. This invention provides reliable locking friction while allowing the screw to rotate flexibly and better control lifting and lowering with a relatively large threaded pair clearance, improving the locking performance of the threaded pair and resulting in a compact structure.

Description

Technical Field

[0001] This invention belongs to the field of electric support rod technology, and in particular electric support rods. Background Technology

[0002] With the widespread application of intelligent control, electric support rods have become widely used due to their ability to provide more precise control. They are applied in fields such as height-adjustable desks, height-adjustable chairs, and height-adjustable workbenches. Electric support rods use a screw drive to convert the rotational motion of a screw into the axial extension and retraction of the support rod, thereby adjusting its support length. When the electric support rod extends to its designed maximum length, the length needs to be locked to prevent changes in length under load that could affect performance. The screw drive requires a threaded pair with a large clearance to allow the screw to rotate flexibly and better control the lifting. However, the lower locking friction of a threaded pair with a large clearance can affect the reliability of locking the electric support rod length. A braking device can improve the locking performance of the threaded pair. Summary of the Invention

[0003] To address the aforementioned technical problems, this invention provides an electric support rod that improves locking reliability and has a compact structure.

[0004] An electric support rod includes: a motor mounting rear cover, a motor mounting front cover, a motor and transmission assembly, a screw retaining ring, a bearing, a screw, a support rod, a support rod nut, a nut pin, a screw end cover, a screw end cover retaining ring, and a guide tube. The rear end of the motor and transmission assembly is fixed inside the motor mounting rear cover, and the front end of the motor and transmission assembly is fixed inside the motor mounting front cover. The motor mounting front cover is fixedly connected to the motor mounting rear cover, thus fixing the motor mounting rear cover, the motor and transmission assembly, and the motor mounting front cover into a single unit. The bearing is installed in a countersunk hole at the bottom of the motor mounting front cover. The screw passes through the bearing's center hole and the through hole at the bottom of the motor mounting front cover and extends into the motor and transmission assembly. A screw retaining ring is provided on the screw to hold the top of the screw inside the motor and transmission assembly. A support rod nut is installed inside the support rod, and the support rod nut is fixed to the support rod by a nut pin. The bottom of the support rod nut is provided with a bottom boss and several axial grooves divide the bottom boss into several parts so that the bottom boss will produce radial elastic deformation when subjected to radial force. A screw end cap with a tapered countersunk hole is installed at the bottom of the screw. The screw end cap retaining ring is fixed in the groove at the bottom of the screw and fixes the screw end cap to the screw. The guide tube is sleeved on the outside of the support rod. When the support rod nut moves axially downwards until the bottom boss of the support rod nut hits the tapered surface of the tapered countersunk hole of the screw end cap, the bottom boss of the support rod nut is squeezed by the tapered surface of the tapered countersunk hole of the screw end cap and produces axial elastic deformation, which reduces the thread fit clearance between the support rod nut and the screw and applies the radial force to the screw, thus forming the clamping braking force of the bottom boss of the support rod nut on the screw. The bottom boss of the support rod nut, the screw, the screw end cap and the screw end cap retaining ring constitute the braking device of the electric support rod.

[0005] In the electric support rod, the bottom end of the conduit is equipped with a conduit bottom cover, and the top of the conduit is fixed with a support rod fixing plate. Screws fix the motor mounting cover to the support rod fixing plate, thereby assembling the motor and gearbox assembly, screw, support rod and conduit into an electric support rod assembly.

[0006] In the electric support rod, when the motor drives the screw to rotate in the direction of rotation of the screw thread, the screw drives the support rod nut to move the support rod upward along the axial direction, thereby shortening the overall length of the electric support rod. When the motor drives the screw to rotate in the opposite direction of rotation of the screw thread, the screw drives the support rod nut to move the support rod downward along the axial direction, thereby lengthening the overall length of the electric support rod.

[0007] In the electric support rod, the buckle of the motor mounting front cover is tightly fastened into the side hole of the motor mounting rear cover.

[0008] In the aforementioned electric support rod, the support rod fixing plate is fixed to the top of the guide tube by a tight fit or pin fixation.

[0009] In the electric support rod, the top of the support rod is provided with a support rod top seat. The support rod top seat is fixed to the support rod by a top seat pin. The flange of the support rod top seat is fastened in the axial groove of the guide tube so that the support rod can only move axially along the axial groove of the guide tube.

[0010] The electric support rod described herein has a centrally symmetrical structure.

[0011] In the aforementioned electric support rod, the conduit is a cylindrical structure.

[0012] In the electric support rod, the motor mounting rear cover and the motor mounting front cover are respectively semi-cylindrical structures located inside the guide tube.

[0013] In the aforementioned electric support rod, the screw is located on the central axis of the conduit.

[0014] Compared with the prior art, the present invention has the following advantages:

[0015] The electric support rod, with its threaded pair featuring a large fitting clearance, allows the screw to rotate flexibly, thus better controlling the lifting and lowering while providing reliable locking friction. This improves the locking performance of the threaded pair and results in a compact structure. Attached Figure Description

[0016] The accompanying drawings illustrate exemplary embodiments of the invention and, together with the description thereof, serve to explain the principles of the invention. These drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification.

[0017] Figure 1 This is a cross-sectional schematic diagram of the electric support rod in its longest state according to one embodiment of the present invention. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, it should be noted that, for ease of description, only the parts relevant to the present invention are shown in the accompanying drawings.

[0019] It should be noted that, where there is no conflict, the embodiments and features described in this invention can be combined with each other. The technical solution of this invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0020] Unless otherwise stated, the exemplary embodiments / exemplifications shown are to be understood as providing exemplary features of various details that provide ways in which the technical concept of the invention can be implemented in practice. Therefore, unless otherwise stated, the features of the various embodiments / exemplifications may be additionally combined, separated, interchanged and / or rearranged without departing from the technical concept of the invention.

[0021] Crosshairs and / or shading may be used in the accompanying drawings to clarify the boundaries between adjacent components. Thus, unless otherwise stated, the presence or absence of crosshairs or shading does not convey or indicate any preference or requirement for the specific material, material properties, dimensions, proportions, commonalities between the illustrated components, or any other characteristics, properties, etc., of the components. Furthermore, the dimensions and relative dimensions of components may be exaggerated in the accompanying drawings for clarity and / or descriptive purposes. When exemplary embodiments can be implemented differently, a specific process sequence may be performed in a manner different from the described order of steps. For example, two consecutively described processes may be performed substantially simultaneously or in the reverse order of the described process. Moreover, the same reference numerals denote the same components.

[0022] When a component is referred to as being "on" or "above" another component, "connected to," or "joined to" another component, the component may be directly on, directly connected to, or directly joined to the other component, or there may be intermediate components. However, when a component is referred to as being "directly on" another component, "directly connected to," or "directly joined to" another component, there are no intermediate components. Therefore, the term "connection" can refer to a physical connection, an electrical connection, etc., and may or may not have intermediate components.

[0023] For descriptive purposes, the present invention may use spatial relative terms such as “below,” “under,” “below,” “down,” “above,” “above,” “higher,” and “side, for example, as in a “side wall”” to describe the relationship between one component and another component as shown in the accompanying drawings. In addition to the orientations depicted in the drawings, the spatial relative terms are also intended to encompass different orientations of the device during use, operation, and / or manufacture. For example, if the device in the drawings is flipped, a component described as “below” or “under” another component or feature would subsequently be positioned “above” said other component or feature. Thus, the exemplary term “below” can encompass both “above” and “below” orientations. Furthermore, the device may be otherwise positioned, for example, rotated 90 degrees, or in other orientations, thus interpreting the spatial relative descriptive terms used herein accordingly.

[0024] The terminology used herein is for the purpose of describing particular embodiments and is not intended to be limiting. As used herein, unless the context clearly indicates otherwise, the singular forms “a kind,” “one,” and “the” are also intended to include the plural forms. Furthermore, when the terms “comprising” and / or “including” and variations thereof are used in this specification, it indicates the presence of the stated features, integrals, steps, operations, parts, components, and / or groups thereof, but does not exclude the presence or addition of one or more other features, integrals, steps, operations, parts, components, and / or groups thereof. It should also be noted that, as used herein, the terms “substantially,” “about,” and other similar terms are used as approximate terms rather than as terms of degree, thus explaining the inherent biases in measurements, calculated values, and / or provided values ​​that will be recognized by one of ordinary skill in the art.

[0025] See Figure 1In one embodiment, the electric support rod of the present invention includes a motor mounting rear cover 1, a motor mounting front cover 3, a motor and gearbox assembly 2, a screw retaining ring 4, a bearing 5, a screw 6, a support rod 7, a support rod nut 8, a nut pin 9, a screw end cover 12, a screw end cover retaining ring 13, and a guide tube 14. The rear end of the motor and gearbox assembly 2 is fixed inside the motor mounting rear cover 1, and the front end of the motor and gearbox assembly 2 is fixed inside the motor mounting front cover 3. The motor mounting front cover 3 is fixedly connected to the motor mounting rear cover 1 to support the electric motor. The rear cover 1, motor and gearbox assembly 2, and front cover 3 are fixed together as a whole. Bearing 5 is installed in the countersunk hole at the bottom of the front cover 3. Screw 6 passes through the center hole of bearing 5 and the through hole at the bottom of the front cover 3, extending into the motor and gearbox assembly 2. A screw retainer 4 is provided on screw 6 to hold the top of screw 6 within the motor and gearbox assembly 2. A support rod nut 8 is installed inside the support rod 7, and the support rod nut 8 is fixed to the support rod 7 by a nut pin 9. The bottom of the support rod nut 8 is... A bottom boss 8-1 is provided, and several axial grooves 8-2 divide the bottom boss 8-1 into several parts, causing the bottom boss 8-1 to undergo radial elastic deformation when subjected to radial force. A screw end cap 12 with a tapered countersunk hole 12-1 is installed at the bottom of the screw 6. The screw end cap retaining ring 13 is fixed in the groove 6-1 at the bottom of the screw 6, thus fixing the screw end cap 12 to the screw 6. The guide tube 14 is sleeved on the outside of the support rod 7. The support rod nut 8 moves axially downward until the bottom boss 8-1 of the support rod nut 8 hits the screw end cap 12. When the tapered countersunk hole 12-1 is conical, the bottom boss 8-1 of the support rod nut 8 is squeezed by the tapered countersunk hole 12-1 of the screw end cap 12, resulting in elastic deformation towards the axis, which reduces the thread fit clearance between the support rod nut 8 and the screw 6, and applies the radial force to the screw 6, thereby forming the clamping braking force of the bottom boss 8-1 of the support rod nut 8 on the screw 6. The bottom boss 8-1 of the support rod nut 8, the screw 6, the screw end cap 12 and the screw end cap retaining ring 13 constitute the braking device of the electric support rod.

[0026] In a preferred embodiment of the electric support rod, the bottom end of the conduit 14 is fitted with a conduit bottom cover 15, and the top of the conduit 14 is fixed with a support rod fixing plate 16. The screw 17 fixes the motor mounting cover 1 to the support rod fixing plate 16, thereby combining the motor and gearbox assembly 2, the screw 6, the support rod 7 and the conduit 14 into an electric support rod assembly.

[0027] In a preferred embodiment of the electric support rod, when the motor drives the screw 6 to rotate in the direction of rotation of the screw 6's thread, the screw 6 drives the support rod nut 8 to move the support rod 7 axially upward, thereby shortening the overall length of the electric support rod. When the motor drives the screw 6 to rotate in the opposite direction of rotation of the screw 6's thread, the screw 6 drives the support rod nut 8 to move the support rod 7 axially downward, thereby lengthening the overall length of the electric support rod.

[0028] In a preferred embodiment of the electric support rod, the snap fastener of the motor mounting front cover 3 is fastened into the side hole of the motor mounting rear cover 1.

[0029] In a preferred embodiment of the electric support rod, the support rod fixing plate 16 is fixed to the top of the guide tube 14 by a tight fit or pin fixation.

[0030] In a preferred embodiment of the electric support rod, the top of the support rod 7 is provided with a support rod top seat 10. The support rod top seat 10 is fixed to the support rod 7 by a top seat pin 11. The flange 10-1 of the support rod top seat 10 is fastened in the axial groove of the guide tube 14 so that the support rod 7 can only move axially along the axial groove of the guide tube 14.

[0031] In a preferred embodiment of the electric support rod, the electric support rod has a centrally symmetrical structure.

[0032] In a preferred embodiment of the electric support rod, the conduit 14 is a cylindrical structure.

[0033] In a preferred embodiment of the electric support rod, the motor mounting rear cover 1 and the motor mounting front cover 3 are respectively semi-cylindrical structures disposed within the conduit 14.

[0034] In a preferred embodiment of the electric support rod, the screw 6 is located on the central axis of the conduit 14.

[0035] In one embodiment, such as Figure 1As shown, an electric support rod includes a motor mounting rear cover 1, a motor mounting front cover 3, a motor and gearbox assembly 2, a screw retaining ring 4, a bearing 5, a screw 6, a support rod 7, a support rod nut 8, a nut pin 9, a support rod top seat 10, a top seat pin 11, a screw end cover 12, a screw end cover retaining ring 13, a guide tube 14, a guide tube bottom cover 15, a support rod fixing plate 16, and screws 17. The rear end of the motor and gearbox assembly 2 is fixed inside the motor mounting rear cover 1, and the front end of the motor and gearbox assembly 2 is fixed inside the motor mounting front cover 3. The buckle of the motor mounting front cover 3 is tightly fastened into the side hole of the motor mounting rear cover 1, thereby fixing the motor mounting rear cover 1, the motor and gearbox assembly 2, and the motor mounting front cover 3 into a fixed structure. The bearing 5 is installed in the countersunk hole at the bottom of the motor mounting front cover 3. The screw 6 passes through the center hole of the bearing 5 and the through hole at the bottom of the motor mounting front cover 3 and extends into the motor and gearbox assembly 2. The screw 6 is provided with a screw retaining ring 4 to hold the top of the screw 6 in the motor and gearbox assembly 2. The support rod 7 is equipped with a support rod nut 8, which is fixed to the support rod 7 by a nut pin 9. The bottom of the support rod nut 8 is provided with a bottom boss 8-1 and several axial grooves 8-2 divide the bottom boss 8-1 into several parts so that the bottom boss 8-1 will produce radial elastic deformation when subjected to radial force. The top of the support rod 7 is provided with a support rod top seat 10, which is secured by a top seat pin. The screw 11 fixes the support rod top seat 10 to the support rod 7. A screw end cap 12 with a tapered countersunk hole 12-1 is installed at the bottom of the screw 6. The screw end cap retaining ring 13 is fixed in the groove 6-1 at the bottom of the screw 6, thus fixing the screw end cap 12 to the screw 6. The guide tube 14 is sleeved on the outside of the support rod 7. The flange 10-1 of the support rod top seat 10 is fastened into the axial groove of the guide tube 14, allowing the support rod 7 to move axially only along the axial groove of the guide tube 14. A guide tube bottom cover 15 is installed at the bottom end of the guide tube 14. A support rod fixing plate 16 is fixed to the top of the guide tube 14. The support rod fixing plate 16 can be fixed to the top of the guide tube 14 by a tight fit, welding, or pin fixing. The screw 17 secures the motor. The rear cover 1 is fixed to the support rod fixing plate 16, thereby assembling the motor and gearbox assembly 2, screw 6, support rod 7 assembly, and guide tube 14 assembly into an electric support rod assembly. When the motor drives the screw 6 to rotate in the direction of rotation of the screw 6 thread, the screw 6 drives the support rod nut 8 to move the support rod 7 axially upward, thus shortening the length of the electric support rod assembly. When the motor drives the screw 6 to rotate in the opposite direction of rotation of the screw 6 thread, the screw 6 drives the support rod nut 8 to move the support rod 7 axially downward, thus lengthening the length of the electric support rod assembly. When the support rod nut 8 moves axially downward until the bottom boss 8-1 of the support rod nut 8 hits the conical countersunk hole 12-1 of the screw end cover 12,The bottom boss 8-1 of the support rod nut 8 undergoes axial elastic deformation due to the conical surface compression of the conical countersunk hole 12-1 of the screw end cap 12. This reduces the thread fit clearance between the support rod nut 8 and the screw 6, and transfers the radial force to the screw 6, thus forming the clamping braking force of the bottom boss 8-1 of the support rod nut 8 on the screw 6. The bottom boss 8-1 of the support rod nut 8, the screw 6, the screw end cap 12, and the screw end cap retaining ring 13 constitute the braking device of the electric support rod. The braking effect of the braking device improves the locking and anti-loosening performance of the electric support rod in the extended state, thereby enhancing the working reliability of the electric support rod.

[0036] In the description of this specification, the references to terms such as "one embodiment / mode," "some embodiments / modes," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment / mode or example is included in at least one embodiment / mode or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment / mode or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments / modes or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments / modes or examples described in this specification, as well as the features of different embodiments / modes or examples.

[0037] 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 at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0038] Those skilled in the art should understand that the above embodiments are merely for illustrating the present invention and are not intended to limit the scope of the invention. Those skilled in the art can make other changes or modifications based on the above disclosure, and these changes or modifications still fall within the scope of the present invention.

Claims

1. An electrically powered support pole, characterized by, It includes: Screw (6), support rod (7), support rod nut (8), screw end cap (12), screw end cap retaining ring (13), and guide tube (14). The screw (6) is located on the central axis of the conduit (14). A support rod nut (8) is installed inside the support rod (7). The support rod nut (8) is fixed to the support rod (7) by a nut pin (9). The bottom of the support rod nut (8) is provided with a bottom boss (8-1) and is divided into several parts by several axial grooves (8-2) so that the bottom boss (8-1) will produce radial elastic deformation when subjected to radial force. A screw end cap (12) with a tapered countersunk hole (12-1) is installed at the bottom of the screw (6). The screw end cap retaining ring (13) is fixed in the groove (6-1) at the bottom of the screw (6) to fix the screw end cap (12) to the screw (6). The conduit (14) is sleeved on the support rod (7). Externally, when the support rod nut (8) moves downward along the axial direction until the bottom boss (8-1) of the support rod nut (8) hits the conical surface of the conical countersunk hole (12-1) of the screw end cap (12), the bottom boss (8-1) of the support rod nut (8) is squeezed by the conical surface of the conical countersunk hole (12-1) of the screw end cap (12), which generates an elastic deformation towards the axis, thereby reducing the thread fit clearance between the support rod nut (8) and the screw (6) and applying the radial force to the screw (6), thus forming the clamping braking force of the bottom boss (8-1) of the support rod nut (8) on the screw (6). The bottom boss (8-1) of the support rod nut (8), the screw (6), the screw end cap (12) and the screw end cap retaining ring (13) constitute the braking device of the electric support rod.

2. The electric support rod according to claim 1, characterized in that, The bottom end of the conduit (14) is fitted with a conduit bottom cover (15), and the top of the conduit (14) is fixed with a support rod fixing plate (16). The screw (17) fixes the motor mounting cover (1) to the support rod fixing plate (16), thereby combining the motor and gearbox assembly (2), screw (6), support rod (7) and conduit (14) into an electric support rod assembly.

3. The electric support rod according to claim 2, characterized in that, When the motor drives the screw (6) to rotate in the direction of rotation of the screw (6) thread, the screw (6) drives the support rod nut (8) to move the support rod (7) upward along the axial direction, thereby shortening the overall length of the electric support rod. When the motor drives the screw (6) to rotate in the opposite direction of rotation of the screw (6) thread, the screw (6) drives the support rod nut (8) to move the support rod (7) downward along the axial direction, thereby lengthening the overall length of the electric support rod.

4. The electric support rod according to claim 1, characterized in that, The buckle of the motor mounting front cover (3) is fastened to the side hole of the motor mounting rear cover (1).

5. The electric support rod according to claim 1, characterized in that, The support rod fixing plate (16) is fixed to the top of the conduit (14) by tight fit or pin fixation.

6. The electric support rod according to claim 1, characterized in that, The top of the support rod (7) is provided with a support rod top seat (10). The support rod top seat (10) is fixed to the support rod (7) by a top seat pin (11). The flange (10-1) of the support rod top seat (10) is fastened in the axial groove of the guide tube (14) so ​​that the support rod (7) can only move axially along the axial groove of the guide tube (14).

7. The electric support rod according to claim 1, characterized in that, The electric support rod has a centrally symmetrical structure.

8. The electric support rod according to claim 7, characterized in that, The conduit (14) has a cylindrical structure.

9. The electric support rod according to claim 8, characterized in that, The motor mounting rear cover (1) and the motor mounting front cover (3) are semi-cylindrical structures located inside the conduit (14).

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