Mounting structure for motor assembly and lifting stand column of electric lifting table

Abstract

The utility model discloses a mounting structure for a motor assembly and a lifting stand column of an electric lifting table, which comprises a transmission rod for connecting the output end of a gear box in the motor assembly with the input end of a lifting transmission mechanism of the lifting stand column, and a fastener for detachably fixing the motor assembly on the lifting stand column, the transmission rod is fixed in a center hole of an output gear of a gear box of the motor assembly before leaving a factory; the transmission rod is a polygonal rod, one end of the transmission rod is a part which is matched with a polygonal center hole of an input gear of a lifting transmission mechanism of the lifting stand column and can drive the input gear to rotate, and the other end of the transmission rod is provided with an annular clamping groove. The annular clamping groove is provided with a flexible expansion ring which enables the transmission rod to be expanded in a preset axial position of a polygonal center hole of an output gear of the gear box. When the installation structure is installed on site, alignment and installation of the transmission rod and the center hole of the input gear of the lifting transmission mechanism of the lifting stand column are facilitated, and the phenomenon that the axial position of the transmission rod is not inserted in place is avoided.

Description

Technical Field

[0001] This utility model relates to the field of electric height-adjustable desk technology, specifically to an installation structure for a motor assembly and a lifting column of an electric height-adjustable desk. Background Technology

[0002] Current electric height-adjustable desks typically feature two lifting columns, usually driven by a single motor assembly. This means the motor assembly is mounted on one column and connected to its lifting mechanism via a short transmission rod (such as a short polygonal rod). A connector and a longer transmission rod (such as a long polygonal rod) then connect to the lifting mechanism of the other column. The polygonal rod is most commonly a regular hexagonal shape.

[0003] To save on packaging volume, the motor assembly is usually packaged separately from each lifting column. At the site of use, the motor assembly is then detachably fixed to a lifting column (e.g., at the top of the column) using fasteners such as two screws. However, to further reduce packaging size, the lifting columns connected to the short transmission rod and motor assembly are typically packaged separately, with the motor assembly, short transmission rod, and multiple noise-reducing pads (e.g., two plastic cylinders) packaged separately. This existing technology for installing the motor assembly and lifting columns of electric lifting desks still has the following shortcomings: 1. During installation, the motor assembly and lifting column are fixed first, and then the short transmission rod (e.g., a hexagonal rod) is inserted. However, the actual installation process is very inconvenient, especially since the short transmission rod needs to pass through the hole in the gearbox housing to the center hole of the gearbox output gear, and then through the transmission rod through hole in the column to be inserted into the center hole of the input gear of the lifting transmission mechanism of the lifting column. Alignment is difficult, and the axial position is hard to control, sometimes resulting in inaccurate axial positioning that affects transmission stability and reliability, impacting the customer experience. 2. Multiple plastic gaskets need to be inserted and positioned individually on-site, which is not only cumbersome and inefficient, but also easily leads to the motor components being installed in the wrong direction, requiring reinstallation after operation, further increasing the complexity and inefficiency of the installation and affecting the customer experience. 3. Because several key components are packaged separately, it increases the difficulty of storage and the likelihood of delays in installation due to loss and reshipment, further impacting the customer experience. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide an installation structure for the motor assembly and lifting column of an electric lifting table that facilitates the alignment and installation of the central hole of the input gear of the lifting transmission mechanism of the transmission rod and the lifting column during on-site installation, and substantially avoids the phenomenon of incomplete axial insertion of the transmission rod.

[0005] The technical solution of this utility model is to provide an installation structure for the motor assembly and the lifting column of an electric height-adjustable desk, including a transmission rod connecting the output end of the gearbox in the motor assembly to the input end of the lifting transmission mechanism of the lifting column, and fasteners for detachably fixing the motor assembly to the lifting column. The transmission rod is rotatably engaged with the gearbox of the motor assembly and axially limited before leaving the factory.

[0006] With the above structure, the installation structure of the motor assembly and lifting column of this utility model electric lifting table has the following advantages: Since the transmission rod is fixed in the center hole of the output gear of the gearbox of the motor assembly before leaving the factory, during on-site installation, the transmission rod, which is pre-fixed on the gearbox of the motor assembly, is passed through the transmission rod through hole of the lifting column and then inserted into the center hole of the input gear of the lifting transmission mechanism located in the lifting column. Since the transmission rod is fixed on the motor assembly and is inserted as a whole, and since the actual axial length to be inserted into the center hole of the input gear has been reserved in advance, it is easy to align the center hole of the input gear during the actual on-site installation process, making the installation process convenient, quick and efficient. Moreover, the axial position of the insertion is very accurate, which basically avoids the phenomenon of incomplete insertion due to the axial position of the transmission rod, effectively ensuring the stability and reliability of the lifting transmission mechanism of the lifting column, and greatly improving the customer's good experience.

[0007] Furthermore, the transmission rod is a polygonal rod. One end of the transmission rod engages with the central hole of the polygonal shape of the input gear of the lifting transmission mechanism of the lifting column, driving the input gear to rotate. The other end of the transmission rod has an annular groove with a flexible retaining ring that tightens the transmission rod at a predetermined axial position within the polygonal central hole of the output gear of the gearbox. With this specific fixing structure between the transmission rod and the central hole of the output gear of the gearbox in the motor assembly, installation and disassembly are convenient, the axial position is securely and reliably fixed, and noise is eliminated at the axial limiting point.

[0008] Furthermore, the installation structure of the motor assembly and lifting column of the electric lifting table of this utility model also includes an integral base with multiple pads, which is fixed to the bottom of the gearbox housing. With this structure, the pads used for noise reduction and vibration damping become integral bases, such as plastic pads, fixed to the bottom of the gearbox housing of the motor assembly. This makes on-site installation simple, convenient, quick, and efficient. The integral base prevents noise from the motor contacting the lifting column, thus improving the vibration and noise reduction effect. Furthermore, the fixed integral base ensures that the motor assembly can only be installed in one direction, avoiding the possibility of reinstallation due to incorrect orientation, further guaranteeing the simplicity, convenience, and high efficiency of installation. Since the transmission rod is fixed and the pads are also fixed integral bases, multiple key components do not need to be packaged separately, reducing storage difficulty and the likelihood of delays in installation due to loss and reshipment. This further enhances the customer experience.

[0009] Furthermore, the integral pad is secured to the gearbox housing of the motor assembly by multiple pairs of male and female clips. With this structure, the integral pad and gearbox housing, using the aforementioned detachable fixing structure, are easily, quickly, and efficiently installed and disassembled, and the connection is stable and reliable.

[0010] Furthermore, in the male and female fasteners, the male fastener is an arrow-shaped fastener, and the female fastener is a horizontal locking plate. With these specific structures, the installation and disassembly of the male and female fasteners are more convenient, faster, and more efficient, and the connection is more stable and reliable.

[0011] Furthermore, the fasteners are two screw rods that are screwed into two nuts fixed inside the lifting column. The gearbox housing of the motor assembly has two screw rod through holes, each with a rubber clamp that temporarily engages the screw rod with the through hole to prevent loss during packaging and transportation. This structure ensures a more secure and reliable connection between the motor assembly and the lifting column, eliminates noise, and reduces the difficulty of storage and the likelihood of delays due to the absence of separate packaging for the two screw rods and other critical components such as the transmission rod and washer. This also further enhances the customer experience. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of a preferred embodiment of the installation structure of this utility model, in which the motor assembly is installed on the lifting column.

[0013] Figure 2 yes Figure 1 A magnified structural diagram of A in the diagram.

[0014] Figure 3 yes Figure 1 A schematic diagram of the exploded structure (one of the vertical plates is omitted).

[0015] Figure 4 This is an enlarged structural schematic diagram of the transmission rod and its connector in this utility model.

[0016] Figure 5 This is an enlarged structural schematic diagram of the integral pad in this utility model.

[0017] Figure 6 yes Figure 3 A structural diagram from another angle (the top plate is omitted; the length of the lifting column is omitted).

[0018] As shown in the figure:

[0019] 1. Motor assembly; 11. Gearbox; 111. Output gear; 1111. First center hole; 112. Housing; 1121. First screw through hole; 12. Motor; 13. Screw; 14. Rubber clamp; 15. Connector.

[0020] 2. Lifting column; 21. Lifting transmission mechanism; 22. Nut; 23. Second transmission rod through hole; 24. Top plate; 25. Second center hole; 26. Third screw through hole;

[0021] 3. Transmission rod; 31. Annular groove; 32. Flexible retaining ring; 33. Free end; 34. Fixed end;

[0022] 4. Integral pad, 41. Pad cylinder, 411. Second screw through hole, 42. First transmission rod through hole;

[0023] 5. Male and female buckles, 51. Male buckle, 52. Female buckle. Detailed Implementation

[0024] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. It should be noted that these descriptions of specific embodiments are intended to aid in understanding this utility model, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various specific embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0025] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown.

[0026] The present invention is entitled "Installation Structure of Motor Assembly and Lifting Column of Electric Lifting Table", which can also be described as "Installation Structure of Motor Assembly and Each Lifting Column of Electric Lifting Table".

[0027] A preferred embodiment of the motor and lifting column mounting structure of this utility model of an electric height-adjustable desk includes a transmission rod 3 connecting the output end of the gearbox 11 in the motor assembly 1 to the input end of the lifting transmission mechanism 21 of the lifting column 2, and fasteners for detachably fixing the motor assembly 1 to the lifting column 2. The top of the lifting column 2 is provided with a top plate 24.

[0028] The transmission rod 3 is rotatably engaged with the gearbox 11 of the motor assembly 1 and axially limited before leaving the factory.

[0029] Before leaving the factory can be understood as during manufacturing, before packaging, or before packaging. The motor assembly 1 includes the motor 12 and the gearbox 11. The motor assembly 1 can also be referred to as an integrated motor and gearbox. The gearbox 11 is also called a gearbox or reduction gearbox.

[0030] In a preferred embodiment of the motor assembly and lifting column installation structure of the electric height-adjustable desk of this utility model, two lifting columns 2 are driven by a single motor assembly 1. The transmission rod 3 in the driving structure of the lifting column 2 driven by the motor assembly 1 is generally referred to as a short transmission rod. It can be installed on-site or pre-installed; this embodiment uses a pre-installed structure. Each lifting column 2 has a transmission rod through-hole, such as a second transmission rod through-hole 23, at its top for the transmission rod 3 to pass through. This transmission rod through-hole, such as the second transmission rod through-hole 23, is coaxial with the center hole of the input gear of the lifting transmission mechanism 21, such as the second center hole 25. A connector 15 is fixed to the outer end of the transmission rod 3 extending out of the gearbox 11. Each lifting column 2 also has two screw through-holes, such as a third screw through-hole 26, at its top for the screw 13 to pass through. It is easy to understand that the long transmission rod connected to the connector 15 is connected to the other lifting column via a transmission connection; this is not the inventive point of this utility model and will not be described in detail here.

[0031] The transmission rod 3, before leaving the factory, can have the following specific structure for rotating and axially limiting its position with the gearbox 11 of the motor assembly 1: The transmission rod 3 can be a polygonal rod, such as a hexagonal rod. One end of the transmission rod 3, which rotates synchronously with the output gear 111 of the gearbox 11, has an annular groove 31. The annular groove 31 has a flexible retaining ring 32 that limits the transmission rod 3 to a predetermined axial position on the outer end face of the output gear 111, such as the first central hole 1111 of the polygonal center hole of the output gear 111 of the gearbox 11. The other end of the transmission rod 3 is a part that engages with the second central hole 25 of the polygonal center hole of the lifting transmission mechanism 21 of the lifting column 2 and can drive the input gear to rotate. One end of the transmission rod 3, or short transmission rod, can be called the fixed end 34, and the other end can be called the free end 33. The flexible retaining ring 32 is, for example, a rubber ring.

[0032] A preferred embodiment of the motor assembly and lifting column mounting structure of the electric height-adjustable table of this utility model further includes an integral base 4 with multiple pads 41, the integral base 4 being fixed to the bottom of the housing 112 of the gearbox 11. Each pad 41 may be provided with a second screw through hole 411 for threading a screw 13. The central hole of the integral base 4 is a first transmission rod through hole 42.

[0033] The integral pad 4 can be fixed to the housing 112 of the gearbox 11 of the motor assembly 1 by multiple pairs of male and female buckles 5.

[0034] As shown in the figure, the male buckle 51 in the male and female buckle 5 can be an arrow-shaped buckle, and the female buckle 52 can be a horizontal buckle plate. A structure with two pairs of male and female buckles 5 can be adopted: two male buckles 51 are set on the integral pad 4, such as a plastic pad, and two female buckles 52 that engage with it are set on the housing 112 of the gearbox 11.

[0035] The fasteners can be two screws 13 that are screwed to two nuts 22 fixed inside the lifting column 2. The two screw through holes of the gearbox 11 housing 112 of the motor assembly 1, such as the first screw through hole 1121, can each have a rubber clamp 14 that temporarily engages the screws 13 with the screw through holes, such as the first screw through hole 1121, to prevent the screws 13 from being lost during packaging and transportation.

[0036] In a preferred embodiment of the motor assembly 1 and lifting column installation structure of this utility model's electric lifting table, during on-site installation, the transmission rod 3, pre-fixed on the gearbox 11 of the motor assembly 1, passes through the transmission rod through hole 23 of the lifting column 2, and then inserts into the center hole 25 of the input gear of the lifting transmission mechanism 21 located inside the lifting column 2. Two screws 13 apply force towards the nuts 22 to overcome the constraint force of the rubber clamp 14 and are screwed together with the two nuts 22 fixed inside the lifting column 2. It is easy to understand that the two screws 13 pass through their respective first screw through hole 1121, second screw through hole 411, and third screw through hole 26 and are screwed into their respective nuts 22.

[0037] The specific embodiments described above allow for the following variations.

[0038] The specific structure for the transmission rod to rotate and axially limit with the gearbox of the motor assembly before leaving the factory can also be as follows: the axial limiting of the transmission rod with the center hole of the output gear of the gearbox of the motor assembly is achieved by a slot and a spring clip axially limiting the outer end face of the output wheel; or the fixed end of the transmission rod is fixed to the output gear and rotates with it, and the axial limiting is achieved by a rolling bearing: the outer ring of the rolling bearing is fixed to the center hole of the gearbox, and the inner ring of the rolling bearing is axially fixed to the transmission rod, such as by an interference fit. The transmission rod can also be a round rod, and the circumferential limiting ends of the transmission rod with the center holes of the output gear and the input gear can both be splined holes and splined shafts.

[0039] In addition to the detachable plastic pads with male and female snap-fit ​​connections mentioned above, the integral pads can also be detachably fixed plastic pads with screw connections or bolt and nut connections, or they can be fixed rubber pads such as those glued to the bottom of the gearbox.

[0040] The number of male and female buckles can also be three pairs.

[0041] The fastening screws can be in the form of three screws. The screws can also be pre-installed on the lifting column; during installation, the screws pass through the gearbox's through-holes and are then tightened by nuts. Clamps can also be replaced by connecting straps, as long as they prevent the screws from being lost.

[0042] Components, structures, or quantities not marked above are not shown in the drawings, and some components are not marked in the drawings. The drawings are for illustrative purposes only. In case of any inconsistency between the drawings and the text description, or between the drawings themselves, the text description shall prevail.

[0043] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A mounting structure of a motor assembly and a lifting column of an electric lifting table, comprising a transmission rod connecting an output end of a gear box in the motor assembly and an input end of a lifting transmission mechanism of the lifting column, and a fastener detachably fixing the motor assembly on the lifting column, characterized in that: The transmission rod is matched with the gear box of the motor assembly in rotation and is axially limited before leaving factory.

2. The mounting structure of the motor assembly and the lifting column of the electric lifting table according to claim 1, characterized in that: The transmission rod is a polygonal rod, one end of the transmission rod rotating synchronously with the output gear of the gear box has an annular clamping groove, the annular clamping groove has a flexible clamping ring limiting the transmission rod in a predetermined axial position of the polygonal central hole of the output gear of the gear box, and the other end of the transmission rod is a part matched with the polygonal central hole of the input gear of the lifting transmission mechanism of the lifting column and capable of driving the input gear to rotate.

3. The mounting structure of the motor assembly and the lifting column of the electric lifting table according to claim 1, characterized in that: The integral pad seat is fixed to the bottom of the shell of the gear box.

4. The mounting structure of a motor assembly and a lifting column of an electric lifting table according to claim 3, characterized in that: The integral pad seat is fixed to the bottom of the shell of the gear box.

5. The mounting structure of a motor assembly and a lifting column of an electric lifting table according to claim 4, characterized in that: The male buckle of the male-female buckle is an arrow type buckle, and the female buckle is a horizontal type clamping plate.

6. The mounting structure of a motor assembly and a lifting column of an electric lifting table according to claim 1, characterized in that: The fastener is two screw rods screwed with two nuts fixed in the lifting column, and each of the two screw rod through holes of the gear box shell of the motor assembly has a rubber clamping ring temporarily clamping the screw rod with the screw rod through hole to prevent the screw rod from being lost during packaging and transportation.

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