Linear stand column assembly using small-tooth-difference reduction gearbox

Abstract

The utility model relates to a linear stand column assembly using a small tooth difference reduction gearbox, which comprises a stand column body, an installation cavity is arranged in the stand column body, a driving motor, a speed reducer and a lifting rod are arranged in the installation cavity, the lifting rod is connected with the driving motor through the speed reducer, the speed reducer comprises a box body, and an outer gear ring is arranged in the box body. Inner teeth are arranged on the inner side of the outer gear ring, the outer gear ring is connected to the driving motor, the center of the outer gear ring and the output end of the driving motor are located on the same axis, the output end of the driving motor is connected with an eccentric shaft, the eccentric shaft is connected with a duplex reduction gear, and the side, away from the driving motor, of the duplex reduction gear is connected with an output sleeve used for being connected with a lifting rod. The eccentric shaft, the outer gear ring and the duplex reduction gear are matched with one another to decelerate the output end of the driving motor, and then motion and power are output outwards through the output sleeve. The utility model has the following advantages and effects: the overall aesthetic degree can be improved, and the occupied space of the linear upright post is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of lifting tables, in particular to a linear column assembly using a speed reducer with a small tooth difference. Background Art

[0002] The automatic lifting table can drive the desktop to rise and fall through the motor, thereby adjusting the height of the desktop. This allows users to alternate between sitting and standing, avoiding sitting for long periods of time and affecting human health. When raising and lowering the desktop, a reducer needs to be connected between the drive motor and the lifting column. This can reduce the speed of the output shaft, thereby improving the stability of the lifting column during lifting.

[0003] For example, the Chinese patent technology document with publication number CN215685531U discloses a column assembly and a lifting table frame, including a lifting column and a single reduction motor that drives the lifting column to rise and fall. The lifting column includes a sleeve and a transmission assembly that drives the sleeve to extend and retract. The single reduction motor includes a reduction gearbox, on which a single motor is fixed. The reduction gearbox is provided with a transmission rod, which is inserted into the lifting column and is connected to the transmission assembly. The reduction gearbox is fixed to the side wall of the sleeve by fasteners.

[0004] In the above technical solution, the internal structure of the reducer is mainly a worm gear, so the output shaft of the motor and the connecting shaft of the lifting column are not on the same axis. This requires the reducer and the drive motor to be installed externally, which affects the overall aesthetics and causes the lifting column to occupy a larger space. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a linear column assembly using a small-tooth-difference reduction gearbox, which can install the driving components internally to improve the overall aesthetics and reduce the space occupied by the linear column.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a linear column assembly using a small-tooth-difference reduction gearbox, comprising a column body, a mounting cavity being provided in the column body, a drive motor, a reducer and a lifting rod being provided in the mounting cavity, the lifting rod and the drive motor being connected via a reducer, the reducer comprising a housing, an outer gear ring being provided in the housing, an inner side of the outer gear ring being provided with inner teeth, the outer gear ring being connected to the drive motor, the center of the outer gear ring and the output end of the drive motor being located on the same axis, the output end of the drive motor being connected to an eccentric shaft, the eccentric shaft being connected to a double reduction gear, the double reduction gear being located on a side away from the drive motor and being connected to an output sleeve, the output sleeve being used to connect the lifting rod, the eccentric shaft, the outer gear ring and the double reduction gear cooperate with each other to reduce the output end of the drive motor, and then the output sleeve outputs motion and power to the outside.

[0007] The utility model is further configured as follows: a first eccentric portion and a second eccentric portion are provided on the eccentric shaft, and the first eccentric portion and the second eccentric portion are arranged alternately.

[0008] The utility model is further configured as follows: the double reduction gear includes a first reduction gear and a second reduction gear, the first reduction gear and the second reduction gear are respectively mounted on the first eccentric part and the second eccentric part, the first reduction gear and the second reduction gear are respectively engaged with the internal teeth to form a first small tooth difference gear pair and a second small tooth difference gear pair respectively.

[0009] The utility model is further configured as follows: a first transmission hole is provided through the first reduction gear, and the first transmission holes are multiple and evenly distributed along the circumference; a second transmission hole is provided through the second reduction gear, and the second transmission holes are multiple and evenly distributed along the circumference; the output sleeve is provided with a cylindrical pin on the side facing the reducer, and the cylindrical pin is used to penetrate the first transmission hole and the second transmission hole to form a transmission fit between each other.

[0010] The utility model is further configured as follows: a lifting sleeve is sleeved on the outer periphery of the column body, and the lifting rod includes a lead screw and a connecting sleeve, one end of the connecting sleeve is sleeved on the outer periphery of the lead screw and forms a threaded fit with the lead screw, and one end is fixed to the lifting sleeve.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] Since the reducer adopts the structure of an outer ring gear, a double reduction gear and an eccentric shaft, by connecting the eccentric shaft to the output end of the drive motor and driving the eccentric shaft to rotate by the drive motor, the double reduction gear can rotate and revolve in the outer ring gear, and through the difference in the number of teeth between the double reduction gear and the inner teeth of the outer ring gear, the power can be transmitted to the output sleeve in the form of reduction, thereby preventing the lifting rod from rotating too fast. In addition, the use of this reduction structure can make the drive motor, reducer and lifting rod located on the same axis, making the overall structure more compact, so that the reducer and drive motor can be installed in the mounting cavity of the column body. Therefore, it effectively solves the technical problem of the prior art that the reducer and drive motor need to be installed externally, thereby improving the overall aesthetics, reducing the large space occupied by the straight column, and making the lifting rod have a longer telescopic stroke under the same conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the cross-sectional structure of the utility model;

[0014] Figure 2 This is an exploded diagram of the connection between the drive motor and the reducer in the present utility model;

[0015] Figure 3 This is a schematic diagram of the internal structure of the reducer in the utility model. DETAILED DESCRIPTION

[0016] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0017] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0018] like Figures 1 to 3 As shown, the utility model discloses a linear column assembly using a small-tooth-difference reduction gearbox, including a column body 1, a mounting cavity 101 is provided in the column body 1, a driving motor 2, a reducer and a lifting rod 4 are provided in the mounting cavity 101, the lifting rod 4 and the driving motor 2 are connected through the reducer, the reducer includes a box body 31, an outer gear ring 32 is provided in the box body 31, the inner side of the outer gear ring 32 is provided with inner teeth, the outer gear ring 32 is connected to the driving motor 2, the center of the outer gear ring 32 and the output end of the driving motor 2 are located on the same axis, the output end of the driving motor 2 is connected to an eccentric shaft 33, the eccentric shaft 33 is connected to a double reduction gear 34, the double reduction gear 34 is located on the side away from the driving motor 2 and is connected to an output sleeve 35, the output sleeve 35 is used to connect the lifting rod 4, the eccentric shaft 33, the outer gear ring 32 and the double reduction gear 34 cooperate with each other to reduce the output end of the driving motor 2, and then the output sleeve 35 outputs motion and power to the outside;

[0019] By connecting the eccentric shaft 33 to the output end of the drive motor 2, the drive motor 2 drives the eccentric shaft 33 to rotate, so that the double reduction gear 34 can rotate and revolve in the outer ring gear 32, and through the difference in the number of teeth between the double reduction gear 34 and the inner teeth of the outer ring gear 32, the power can be transmitted to the output sleeve 35 in the form of deceleration for output, thereby avoiding the lifting rod 4 from rotating too fast. In addition, the use of this deceleration structure can make the drive motor 2, the reducer and the lifting rod 4 located on the same axis, making the overall structure more compact, so that the reducer and the drive motor 2 can be installed in the mounting cavity 101 of the column body 1, thereby improving the overall aesthetics, reducing the space occupied by the linear column, and making the lifting rod 4 have a longer telescopic stroke under the same conditions.

[0020] In this embodiment, the eccentric shaft 33 is provided with a first eccentric portion 331 and a second eccentric portion 332, and the first eccentric portion 331 and the second eccentric portion 332 are arranged alternately. In addition, the double reduction gear 34 includes a first reduction gear 341 and a second reduction gear 342, and the first reduction gear 341 and the second reduction gear 342 are respectively mounted on the first eccentric portion 331 and the second eccentric portion 332, and the first reduction gear 341 and the second reduction gear 342 are respectively engaged with the internal teeth to form a first small tooth difference gear pair and a second small tooth difference gear pair. The gear pair, after the driving motor 2 drives the eccentric shaft 33 to rotate, the first reduction gear 341 and the second reduction gear 342 respectively mounted on the first eccentric portion 331 and the second eccentric portion 332 can respectively revolve and rotate within the outer gear ring 32 under the action of meshing with the internal teeth of the outer gear ring 32. In this way, the first reduction gear 341 and the second reduction gear 342 respectively form a first small tooth difference gear pair and a second small tooth difference gear pair with the internal teeth, which can transmit power to the output sleeve 35 in the form of deceleration to output a higher reduction ratio.

[0021] In this embodiment, the eccentric shaft 33, the outer ring gear 32 and the double reduction gear 34 cooperate with each other to transmit motion and power to the output sleeve 35 in the form of deceleration. The principle is that a first transmission hole 341a is provided on the first reduction gear 341, and the first transmission holes 341a are multiple and evenly distributed along the circumference. A second transmission hole 342a is provided on the second reduction gear 342, and the second transmission holes 342a are multiple and evenly distributed along the circumference. The output sleeve 35 is provided with a cylindrical pin 351 on the side facing the reducer. The cylindrical pin 351 is used to penetrate the first transmission hole 341a and the second transmission hole 341a. The two transmission holes 342a form a transmission fit with each other. In this way, after the driving motor 2 drives the eccentric shaft 33 to rotate, since the eccentric shaft 33 is provided with a first eccentric portion 331 and a second eccentric portion 332 that are staggered (quasi-center-symmetrical) with each other, after the first reduction gear 341 and the second reduction gear 342 rotate and revolve respectively, the angular difference between the first transmission hole 341a and the second transmission hole 342a can generate a corresponding torque, thereby pushing the cylindrical pin 351, so that the output sleeve 35 rotates, wherein the output sleeve 35 is connected to the housing 31 via a bearing.

[0022] In this embodiment, a lifting sleeve 5 is mounted on the outer periphery of the column body 1, and the lifting rod 4 includes a screw 41 and a connecting sleeve 42. One end of the connecting sleeve 42 is mounted on the outer periphery of the screw 41 and forms a threaded fit with the screw 41, and the other end is fixed to the lifting sleeve 5. The principle of lifting of the linear column is that after the driving motor 2 drives the screw 41 to rotate through the reducer, the connecting sleeve 42 can be moved along the direction of the screw 41, thereby driving the lifting sleeve 5 to slide along the column body 1 through the movement of the connecting sleeve 42, thereby realizing the lifting and lowering of the linear column, wherein a guide portion is provided on the inner side of the column body 1, and a through hole adapted to the connecting sleeve 42 is provided on the guide portion, so that the movement of the connecting sleeve 42 along the screw 41 can be guided, thereby preventing the connecting sleeve 42 from rotating with the rotation of the screw 41, thereby ensuring the stability of the linear column during lifting and lowering.

[0023] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A linear column assembly using a small tooth difference reduction gearbox, characterized in that: It includes a column body, a mounting cavity is provided in the column body, a drive motor, a reducer and a lifting rod are provided in the mounting cavity, the lifting rod and the drive motor are connected through the reducer, the reducer includes a box body, an outer gear ring is provided in the box body, inner teeth are provided on the inner side of the outer gear ring, the outer gear ring is connected to the drive motor, the center of the outer gear ring and the output end of the drive motor are located on the same axis, the output end of the drive motor is connected to an eccentric shaft, the eccentric shaft is connected to a double reduction gear, the double reduction gear is located on the side away from the drive motor and is connected to an output sleeve, the output sleeve is used to connect the lifting rod, the eccentric shaft, the outer gear ring and the double reduction gear cooperate with each other to reduce the output end of the drive motor, and then the output sleeve outputs motion and power to the outside.

2. A linear column assembly using a small tooth difference reduction gearbox according to claim 1, characterized in that: The eccentric shaft is provided with a first eccentric portion and a second eccentric portion, and the first eccentric portion and the second eccentric portion are arranged alternately.

3. A linear column assembly using a small tooth difference reduction gearbox according to claim 2, characterized in that: The double reduction gear includes a first reduction gear and a second reduction gear, the first reduction gear and the second reduction gear are respectively mounted on the first eccentric part and the second eccentric part, the first reduction gear and the second reduction gear are respectively engaged with the internal teeth to form a first small tooth difference gear pair and a second small tooth difference gear pair respectively.

4. A linear column assembly using a small tooth difference reduction gearbox according to claim 3, characterized in that: The first reduction gear is provided with a first transmission hole extending therethrough, and the first transmission holes are multiple and evenly distributed along the circumference. The second reduction gear is provided with a second transmission hole extending therethrough, and the second transmission holes are multiple and evenly distributed along the circumference. The output sleeve is provided with a cylindrical pin on the side facing the reducer, and the cylindrical pin is used to penetrate the first transmission hole and the second transmission hole to form a transmission fit between each other.

5. The linear column assembly using a small tooth difference reduction gearbox according to claim 1, characterized in that: A lifting sleeve is sleeved on the periphery of the column body, and the lifting rod includes a lead screw and a connecting sleeve. One end of the connecting sleeve is sleeved on the periphery of the lead screw and forms a threaded fit with the lead screw, and one end is fixed to the lifting sleeve.

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