Multidirectional transmission gear box

Abstract

The invention provides a multidirectional transmission gear box which comprises a box body, a main gear is rotationally arranged in the box body, at least two side gears are arranged at intervals and meshed with the main gear, and the axes of the at least two side gears are arranged in a staggered mode. The outer side sections of the side gears are supported by the box body, stabilizing pieces are arranged on the inner sides of the side gears, the stabilizing pieces are circumferentially and statically connected to the box body, the side gears and the stabilizing pieces are directly or indirectly coupled and rotate relatively, and the stabilizing pieces support the inner side ends of the side gears and limit radial shaking of the side gears; the main gear serves as a main transmission part and can drive all the gears to rotate synchronously, the transmission rods connected with the side gears face different directions in combination with the orientation layout and the staggered axis design of the side gears, multi-direction transmission is achieved, and rich combination forms and rich product lines are provided for application of lifting tables and the like. The box body and the stabilizing piece form bilateral limiting support, so that the transmission stability of the side gear is guaranteed, and the transmission noise is reduced; the stabilizing piece can limit self rotation, the torsional force borne by the transmission rod is eliminated, and the overall stability is further improved.

Description

Technical Field

[0001] This invention relates to the field of movable furniture, and in particular to a multi-directional transmission gearbox. Background Technology

[0002] As people's quality of life improves, consumers have higher and higher requirements for furniture. In addition to aesthetics, comfort, functionality, and health have become the core considerations for purchasing. Against this backdrop, more and more furniture products rely on mechanical transmission components to achieve better comfort, more functionality, and the concept of healthy office and healthy life.

[0003] Taking the currently popular single-motor height-adjustable desk as an example, its adjustable desktop height can accommodate both sitting and standing postures, and also meet the needs of people of different heights. For office scenarios, multi-workstation single-motor height-adjustable desks have also been designed, which integrate multiple desktops for multiple users. Their shapes are mostly L-shaped, T-shaped, or cross-shaped. For aesthetic reasons, four-legged single-motor height-adjustable desks have also emerged, providing consumers with more shape options. Regardless of the type of single-motor height-adjustable desk, a transmission system is required to achieve synchronous drive of multiple desk legs by a single motor. Multi-workstation single-motor height-adjustable desks and four-legged single-motor height-adjustable desks must be equipped with multi-directional transmission gearboxes because the direction of the transmission rod needs to be changed.

[0004] Existing multi-directional gearboxes for height-adjustable desks are mostly improved from unidirectional transmission gearboxes. In a unidirectional transmission gearbox, there is a main gear and a side gear. The main gear is used to connect to the lead screw of the lifting column, and the side gear is used to connect to the transmission rod. In a single-motor height-adjustable desk using this type of unidirectional transmission gearbox, the transmission rod drives and connects the two lifting columns on both sides. The motor is mounted on the transmission rod, thereby enabling a single motor to drive the lifting of two lifting columns simultaneously.

[0005] In the aforementioned one-way transmission gearbox, the side gear is mounted on a sleeve, which allows the side gear to span across the gearbox housing and provides the side gear with at least two support limiting points. This maintains the stability of the side gear axis and prevents the side gear from moving radially.

[0006] In multi-station single-motor height-adjustable desks and four-legged single-motor height-adjustable desks, the direction of the transmission rods must be changed, and the included angle between the two transmission rods must not be equal to 180° to allow the desk legs to turn in different directions. However, existing multi-directional transmission gearboxes are simply based on the above-mentioned single-directional transmission gearboxes, adding a new side gear in another direction, such as perpendicular to the axis of the original side gear, as in Chinese utility model applications with patent numbers CN201922262474.4 and CN202322817558.6. The biggest problem with this type of multi-directional transmission gearbox is that the newly added side gear is only supported on one side, which easily leads to radial movement. This not only causes noise during transmission but also leads to unstable transmission. The force generated by the movement will accelerate the wear of the transmission rods or cause other adverse effects, thereby shortening the service life of the transmission rods.

[0007] Furthermore, in gearboxes not used in height-adjustable desks, although a small number of products achieve multi-directional transmission and provide support for multiple side gears, these gearboxes do not have outstanding radial limiting capability for the transmission rod. Moreover, when the main gear rotates, the side gears tend to rotate around the main gear. Since the two ends of the transmission rod are respectively set in two gearboxes, when the side gear in one gearbox tends to rotate around the main gear, a torsional force will be generated between the transmission rod and the other gearbox. The transmission rod will experience increased friction or additional stress due to this torque, ultimately leading to a decrease in its service life. Summary of the Invention

[0008] To address the aforementioned technical problems, this invention provides a multi-directional transmission gearbox, comprising a housing, a main gear rotatably mounted within the housing, and at least two side gears spaced apart and meshing with the main gear, with the axes of the at least two side gears staggered. The outer sections of the side gears are supported by the housing, and a stabilizing element is provided on the inner side. The stabilizing element is circumferentially stationary connected to the housing. The side gears are directly or indirectly coupled to the stabilizing element and rotate relative to it. The stabilizing element supports the inner end of the side gear and restricts its radial sway. The main gear, as the primary transmission component, can drive all gears to rotate synchronously. Combined with the orientation layout of the side gears and the staggered axis design, the transmission rods connected to the side gears face different directions, achieving multi-directional transmission and providing rich combination forms for applications such as height-adjustable desks, thus enriching the product line. The housing and the stabilizing element form a double-sided limiting support, ensuring stable transmission of the side gears and reducing transmission noise. The stabilizing element can also restrict its own rotation, eliminate the torsional force on the transmission rod, and mutually restrict and lock its position with the side gears, further improving overall stability.

[0009] The technical solution of this invention is implemented as follows:

[0010] A multi-directional transmission gearbox includes a housing, a main gear rotatably disposed within the housing, and at least two rotatably disposed side gears within the housing. Adjacent side gears are spaced apart, and each side gear meshes with the main gear. The axes of at least two side gears are staggered. The outer section of each side gear is supported by the housing, and a stabilizing element is disposed on the inner side of the side gear. Each side gear is directly or indirectly coupled to the stabilizing element, and the side gear and the stabilizing element are rotatably disposed relative to each other. The stabilizing element is circumferentially stationary connected to the housing and is configured to support the side gear at its inner end and restrict the side gear from swaying radially.

[0011] The main gear, as the primary transmission component, connects all the gears within the gearbox. When any one gear rotates, all the gears in the gearbox will rotate, thus achieving gearbox transmission. Because the gears are located in different positions within the gearbox, and at least two side gears have intersecting axes, the transmission rods connected to the side gears have angles of no more than 180° pointing in different directions, enabling multi-directional transmission of the gearbox. This multi-directional transmission provides more application possibilities, allowing for more combination forms and thus creating more types of height-adjustable desks, enriching the product line.

[0012] The housing provides outer limiting support for the side gear, and the stabilizer provides inner limiting support for the side gear. The limiting supports on both sides keep the side gear stable, that is, the axis of the side gear is fixed by the supports on both sides, so that the side gear will not produce radial wobble, ensuring the stability of the side gear transmission, and reducing or even eliminating transmission noise.

[0013] The stabilizer remains stable within the housing, forming the basis for the stable movement of the side gears. First, the stabilizer is circumferentially stationary within the housing, restricting its own rotation. This prevents the transmission components on the side gears from being subjected to torsional forces from the main gear. Restricting the rotation of the stabilizer also restricts the possible rotation of the side gears and their transmission rods, thus eliminating the aforementioned torsional forces and preventing a decrease in the lifespan of the transmission rods. Second, if the stabilizer is not integrally formed with the housing, after coupling with at least two side gears, the stabilizer provides limiting support for the side gears while also being limited by them. This locks the stabilizer's position (horizontal height) within the housing. The stabilizer and these side gears combine to form a whole, mutually constraining each other to ensure stability.

[0014] The direct coupling mentioned above can be a part of the side gear directly rotatably connected to the stabilizer, while the indirect coupling can be a side gear connected to a transmission rod, and the transmission rod rotatably connected to the stabilizer. However, whether it is direct or indirect coupling, it is necessary to ensure that the side gear cannot wobble along its radial direction.

[0015] Both the side gear and the main gear can be connected to the transmission rod to realize transmission between transmission rods in different directions.

[0016] Preferably, each side gear has a side bearing at its outer end, and the side gear is connected to the housing through the side bearing. The side gear can also be directly rotatably connected to the housing without a side bearing, such as by being rotatably connected to the housing through the lower outer extension, or by inserting the side gear into the transmission rod, after which the transmission rod is rotatably connected to the housing; the side gear can even be integrally formed with the transmission rod.

[0017] Preferably, the side gear includes an outer extension extending outward toward the housing body. The outer extension is cylindrical, and a side bearing is sleeved on the outer extension. The outer extension has a transmission insertion hole configured to allow a transmission rod to be inserted into the side gear.

[0018] Preferably, the side bearing is a sliding bearing with a lubrication groove. Sliding bearings are smaller than rolling bearings, which helps to reduce the size of the housing and is also cheaper. Sliding bearings will generate sliding friction with the outer extension of the side gear, which will lead to wear. Therefore, lubrication grooves are provided and lubricating oil is placed in them to reduce wear.

[0019] Preferably, the housing has an annular groove, and the side bearing is disposed in the annular groove. The annular groove provides limiting support for the side bearing, and in turn, limits support for the side gear.

[0020] Preferably, the housing comprises an upper half and a lower half. The upper half has an upper annular groove, and the lower half has a lower annular groove. The upper and lower halves are connected by screws, and after connection, the upper and lower annular grooves combine to form the annular groove. The housing is a split-type design, which facilitates the installation of the side gear.

[0021] Preferably, the stabilizer includes the same number of stabilizing parts as the side gears, and the stabilizing parts are oriented in the same axial direction as the corresponding side gears and are coaxial. The stabilizing parts are inserted into and engaged with the side gears. The stabilizer couples its stabilizing parts with the corresponding side gears, specifically by inserting the stabilizing parts into and engaging with the side gears. After insertion and engagement, the stabilizing parts support the side gears.

[0022] Preferably, there are four side gears, each arranged circumferentially around the main gear and facing a different direction; the stabilizing element is cross-shaped and has four stabilizing parts. This design makes the gearbox a four-way transmission gearbox, capable of transmitting power in four directions in addition to the main gear; generally, the included angle between the side gears is 90°.

[0023] Preferably, the side gear includes an inner extension extending into the housing, which engages with the stabilizing part. One of the inner extension and the stabilizing part has a circular groove, and the other is a cylinder with the same diameter as the circular groove. This design involves direct coupling between the side gear and the stabilizing component. The stabilizing part supports the side gear by engaging with the inner extension, and the equal diameter of the circular groove and the cylinder enables the stabilizing component to radially limit the movement of the side gear. The cylinder can be a cylindrical shape, a hexagonal prism, or a multifaceted cylinder of other shapes.

[0024] Preferably, the side gear is connected to a transmission rod, the end of which, located inside the housing, extends beyond the side gear and inserts into the stabilizing part. One of these ends, the stabilizing part and the other, has a circular groove, while the other is a cylinder with the same diameter as the groove. This design represents an indirect coupling between the side gear and the stabilizing component. The stabilizing part supports the side gear by inserting into the transmission rod, which in turn connects to the side gear. Simultaneously, the equal diameter of the circular groove and the cylinder allows the stabilizing component to radially limit the transmission rod, thereby achieving radial limiting of the side gear.

[0025] Preferably, there are three side gears, and the stabilizer is T-shaped with three stabilizing parts. The stabilizer can also be cross-shaped, but one of the stabilizing parts needs to be left unused.

[0026] Preferably, there are two side gears, and the stabilizer is L-shaped with two stabilizing parts. The stabilizer can also be T-shaped or cross-shaped, simply by leaving the corresponding stabilizing parts unused.

[0027] Preferably, the stabilizing part is sleeve-shaped, and a lubrication groove is formed on the inner wall of the stabilizing part; the inner end of the stabilizing part has a stop, which is configured to block the side gear along the axial direction. There is relative rotation between the stabilizing part and the side gear or transmission rod. The lubrication groove and the lubricating oil in the lubrication groove can effectively reduce wear; the stop can axially limit the side gear, further increasing the stability of the side gear.

[0028] Preferably, the housing includes an upper half and a lower half, which are connected by screws. The main gear is located in the lower half, and the side gears are located between the upper half and the lower half.

[0029] Preferably, the main gear is connected to a rotating component, and the main gear is equipped with a main bearing component, while the rotating component is equipped with a rotary bearing component. Both the main bearing component and the rotary bearing component are installed in the lower half of the component. This ensures the stability of the main gear, preventing it from wobbling. The support at two points determines the stability of one axis. The side gears are supported on both sides to reduce the overall volume of the gearbox. Of course, a transmission rod can also be connected to the main gear, making the gearbox an intermediate transmission component in a transmission system.

[0030] Preferably, the main bearing component and the rotating bearing component are installed into the lower half of the lower half from the top and bottom, respectively. The main bearing component is also a sliding bearing, the aforementioned rotating component is a lead screw, and the rotating bearing is a rolling bearing. Installing the two bearing components into the lower half from two different directions can maintain the stability of the main bearing and facilitate installation. Furthermore, because the housing is designed to be split into upper and lower sections, the main bearing component and the rotating bearing component can be installed into the lower half in two directions.

[0031] Preferably, the stabilizer is integrally molded with the housing. This integral molding also ensures circumferential static stability with respect to the housing.

[0032] Preferably, the stabilizer is plugged into the housing, and either the stabilizer or the housing has a protruding rotation-limiting rod. Another part of the stabilizer or the housing has a rotation-limiting hole, in which the rotation-limiting rod is inserted and configured to restrict the stabilizer's rotation relative to the housing. The stabilizer and the housing are detachably connected, which ensures the stabilizer remains stationary circumferentially while making the installation of the side gears more convenient.

[0033] Preferably, the rotation limiting rod is a hexagonal rod, and the rotation limiting hole is a hexagonal slot.

[0034] Preferably, the stabilizer is separate from the main gear, with the main gear installed at the lower end of the housing and the stabilizer installed at the upper end. There is a gap between the stabilizer and the main gear; they are not directly connected or connected by a single shaft. This is because the stabilizer does not need to provide further limiting support for the main gear, and separating the stabilizer from the main gear saves costs and reduces wear.

[0035] Preferably, both the side gear and the main gear are bevel gears.

[0036] The design starting point, concept, and beneficial effects of the present invention, which adopts the above technical solution, are as follows:

[0037] The main gear, as the primary transmission component, connects all the gears within the gearbox. When any one gear rotates, all the gears in the gearbox will rotate, thus achieving gearbox transmission. Because the gears are located in different positions within the gearbox, and at least two side gears have intersecting axes, the transmission rods connected to the side gears have angles of no more than 180° pointing in different directions, enabling multi-directional transmission of the gearbox. This multi-directional transmission provides more application possibilities, allowing for more combination forms and thus creating more types of height-adjustable desks, enriching the product line.

[0038] The housing provides outer limiting support for the side gear, and the stabilizer provides inner limiting support for the side gear. The limiting supports on both sides keep the side gear stable, that is, the axis of the side gear is fixed by the supports on both sides, so that the side gear will not produce radial wobble, ensuring the stability of the side gear transmission, and reducing or even eliminating transmission noise.

[0039] The stabilizer remains stable within the housing, forming the basis for the stable movement of the side gears. First, the stabilizer is circumferentially stationary within the housing, restricting its own rotation. This prevents the transmission components on the side gears from being subjected to torsional forces from the main gear. Restricting the rotation of the stabilizer also restricts the possible rotation of the side gears and their transmission rods, thus eliminating the aforementioned torsional forces and preventing a decrease in the lifespan of the transmission rods. Second, if the stabilizer is not integrally formed with the housing, after coupling with at least two side gears, the stabilizer provides limiting support for the side gears while also being limited by them. This locks the stabilizer's position (horizontal height) within the housing. The stabilizer and these side gears combine to form a whole, mutually constraining each other to ensure stability. Attached Figure Description

[0040] Figure 1 This is a three-dimensional structural diagram of the multi-directional transmission gearbox and the rotating component connected in the retracted state in an embodiment of the present invention;

[0041] Figure 2 This is an exploded view of the multi-directional transmission gearbox and transmission components in the unfolded state of the present invention in an embodiment;

[0042] Figure 3 This is a three-dimensional structural diagram of the multi-directional transmission gearbox in the retracted state in an embodiment of the present invention;

[0043] Figure 4 This is a three-dimensional structural diagram of the internal structure of the multi-directional transmission gearbox after the upper half is removed in the unfolded state in an embodiment of the present invention.

[0044] Figure 5 This is a three-dimensional structural diagram of the side gear, main gear, and stabilizing component in the unfolded state of the present invention in an embodiment.

[0045] Figure 6 This is a cross-sectional view of the multi-directional transmission gearbox in an embodiment of the present invention;

[0046] Figure 7 This is a perspective sectional view of the multi-directional transmission gearbox in an embodiment of the present invention;

[0047] Figure 8 This is an assembly drawing of the stabilizer, side gear, and side bearing in an embodiment of the present invention;

[0048] Figure 9This is an assembly diagram showing that, in an embodiment of the present invention, the upper half is provided with a rotation limiting hole and the stabilizing component is provided with a rotation limiting rod;

[0049] Figure 10 This is a three-dimensional structural diagram of the stabilizer in an embodiment of the present invention;

[0050] Figure 11 This is a three-dimensional structural diagram of the box body in an embodiment of the present invention;

[0051] Figure 12 This is a cross-sectional view of the multi-directional transmission gearbox in an embodiment of the present invention, where the stabilizing component is provided with a rotation limiting hole and the upper half is provided with a rotation limiting rod.

[0052] Figure 13 This is a perspective sectional view of the multi-directional transmission gearbox in an embodiment of the present invention, where the stabilizing component is provided with a rotation limiting hole and the upper half component is provided with a rotation limiting rod.

[0053] Figure 14 This is an assembly drawing of the multi-directional transmission gearbox in the embodiment of the present invention, where the stabilizing component is provided with a rotation limiting hole and the upper half is provided with a rotation limiting rod;

[0054] Figure 15 This is a three-dimensional structural diagram of the L-shaped height-adjustable table in an embodiment of the present invention. Figure 1 ;

[0055] Figure 16 This is a three-dimensional structural diagram of the L-shaped height-adjustable table in an embodiment of the present invention. Figure 2 ;

[0056] Figure 17 This is a three-dimensional structural diagram of the L-shaped table frame in an embodiment of the present invention.

[0057] The attached figures are labeled as follows: housing 1; upper half 11; upper half annular groove 111; boss 112; lower half 12; lower half annular groove 121; main gear 2; main bearing 21; rotating part 22; rotating bearing 221; side gear 3; outer extension 31; transmission insertion hole 311; inner extension 32; side bearing 33; stabilizing part 4; stabilizing part 41; circular groove 411; baffle 413; lubrication groove 5; lateral mounting position 6; rotation limiting hole 7; rotation limiting rod 8; motor 9; L-shaped table 13; L-shaped table frame 14; lifting column 15; transmission rod 16. Detailed Implementation

[0058] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0059] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the scope of protection of the invention is not limited to the specific embodiments disclosed below.

[0060] In the description of this invention, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0061] The specific embodiments of the present invention are as follows:

[0062] like Figure 1-7 As shown, the present invention provides a multi-directional transmission gearbox, including a housing 1, a main gear 2 disposed inside the housing 1, the main gear 2 being rotatably disposed in the housing 1; at least two rotatably disposed side gears 3 are also disposed inside the housing 1, adjacent side gears 3 are spaced apart and each side gear 3 meshes with the main gear 2, and the axes of at least two side gears 3 are staggered; the outer section of each side gear 3 is supported by the housing 1, and a stabilizing member 4 is disposed on the inner side of the side gear 3, each side gear 3 being directly or indirectly coupled to the stabilizing member 4, and the side gear 3 and the stabilizing member 4 being rotatably disposed relative to each other; the stabilizing member 4 is circumferentially stationary connected in the housing 1, and the stabilizing member 4 is configured to support the side gear 3 at the inner end of the side gear 3 and restrict the side gear 3 from swaying radially.

[0063] The main gear 2, as the primary transmission component, connects all the gears within the housing 1. When any one gear rotates, all the gears within the housing 1 will rotate, thus achieving gearbox transmission. Because the gears are located in different positions within the housing 1, and at least two side gears 3 have intersecting axes, the transmission rods (not shown) connected to the side gears 3 have angles not equal to 180° pointing in different directions, enabling multi-directional transmission of the gearbox. This multi-directional transmission provides more possibilities for applications, allowing for more combinations and thus creating more types of height-adjustable desks, enriching the product line.

[0064] The housing 1 provides an outer limiting support for the side gear 3, and the stabilizing component 4 provides an inner limiting support for the side gear 3. The limiting supports on both sides keep the side gear 3 stable, that is, the axis of the side gear 3 is fixed by the supports on both sides, so that the side gear 3 will not produce radial wobbling, ensuring the stability of the transmission of the side gear 3, and reducing or even eliminating transmission noise.

[0065] The stabilizer 4 remains stable within the housing 1, providing the basis for the stable movement of the side gear 3. First, the stabilizer 4 is circumferentially stationary within the housing 1, restricting its own rotation. This prevents the transmission components on the side gear 3 from being subjected to the torsional force from the main gear 2. Restricting the rotation of the stabilizer 4 also restricts the possible rotation of the side gear 3 and its transmission rod, thus eliminating the aforementioned torsional force and preventing a decrease in the lifespan of the transmission rod. Second, if the stabilizer 4 is not integrally formed with the housing 1, after the stabilizer 4 is coupled with at least two side gears 3, the stabilizer 4 provides limiting support for the side gears 3 while also being limited by them. This locks the position (horizontal height) of the stabilizer 4 within the housing 1. The stabilizer 4 and these side gears 3 combine to form a whole, mutually restraining each other, thereby ensuring stability.

[0066] The direct coupling mentioned above can be a part of the side gear 3 directly rotatably connected to the stabilizer 4, while the indirect coupling can be a side gear 3 connected to a transmission rod, and the transmission rod rotatably connected to the stabilizer 4. However, whether it is direct or indirect coupling, it is necessary to ensure that the side gear 3 cannot wobble along its radial direction.

[0067] Both the side gear 3 and the main gear 2 can be connected to the transmission rod to realize the transmission between transmission rods in different directions.

[0068] Specifically, such as Figure 2-5 As shown, in this embodiment, there are four side gears 3. The housing 1 has four lateral mounting positions 6 for mounting the four side gears 3. Each of the four lateral mounting positions 6 has an annular groove, and a side bearing 33 is disposed in the annular groove. The side bearing 33 is disposed at the outer end of the side gear 3, and the side gear 3 is connected to the housing 1 through the side bearing 33. Furthermore, the side gear 3 includes an outer extension 31 extending outward toward the housing 1. The outer extension 31 is cylindrical, and the side bearing 33 is sleeved on the outer extension 31. Each side gear 3 has a side bearing 33 at its outer end, and the side gear 3 is connected to the housing 1 through the side bearing 33. The outer extension 31 has a transmission insertion hole 311, which is configured to allow a transmission rod to be inserted into the side gear 3. After the side gear 3 is installed on the lateral mounting position 6 of the housing 1, the side bearing 33 is located in the annular groove, and the annular groove provides limiting support for the side bearing 33, thereby providing limiting support for the outer end of the side gear 3.

[0069] The side bearing component 33 is a sliding bearing, and a lubrication groove 5 is provided on the side bearing component 33. The sliding bearing is smaller in size than the rolling bearing, which is beneficial to reduce the size of the housing 1 and the cost is lower. The sliding bearing will generate sliding friction with the outer extension 31 of the side gear 3, which will lead to wear. Therefore, the lubrication groove 5 is provided and lubricating oil is provided in it to reduce wear.

[0070] In addition, the side gear 3 can also be directly rotatably connected to the housing 1 without the side bearing 33. For example, it can be rotatably connected to the housing 1 through the outer extension 31, or the side gear 3 can be inserted into the transmission rod, and then the transmission rod can be rotatably connected to the housing 1. The side gear 3 can even be integrally formed with the transmission rod. However, without exception, the outer end of the side gear 3 will be ultimately limited and supported by the housing 1.

[0071] To be more specific, such as Figure 6-8 As shown, the stabilizer 4 includes the same number of stabilizing parts 41 as the side gears 3, and the stabilizing parts 41 are oriented in the same direction as the axial direction of their corresponding side gears 3 and are coaxial. The stabilizing parts 41 are inserted into the side gears 3. The stabilizer 4 is coupled to the corresponding side gears 3 by means of its stabilizing parts 41, specifically by means of the insertion of the stabilizing parts 41 into the side gears 3. After insertion, the stabilizing parts 41 provide limiting support for the inner end of the side gears 3. There is a gap between the lateral mounting position 6 and the stabilizing parts 41, and the side gears 3 are located in the gap. The lateral mounting position 6 and the stabilizing parts 41 respectively provide limiting support for the two ends of each corresponding side gear 3, thereby stabilizing each side gear 3.

[0072] Furthermore, each side gear 3 is arranged circumferentially along the main gear 2 and each side gear 3 faces a different direction; the stabilizer 4 is cross-shaped and has four stabilizing parts 41; this scheme makes the gearbox a four-way transmission gearbox, which can transmit power in four directions in addition to the main gear 2; generally, the included angle between the side gears 3 is 90°; the side gear 3 includes an inner extension 32 extending into the housing 1, and the inner extension 32 is inserted into the stabilizer 41; the stabilizer 41 is sleeve-shaped and has a circular groove 411 facing the side gear 3; the inner extension 32 is a column with the same diameter as the circular groove 411. This scheme belongs to the case where the side gear 3 and the stabilizer 4 are directly coupled. The stabilizer 41 supports the side gear 3 by inserting into the inner extension 32. The circular groove 411 and the column have the same diameter, which can realize the radial limitation of the stabilizer 4 on the side gear 3; the column can be a cylinder, a hexagonal prism, or other multi-faceted prisms. In this embodiment, the column is a cylinder. In this embodiment, both the inner extension 32 and the outer extension 31 are integrally formed on the side gear 3, saving the other required parts, making the structure simpler and the assembly more convenient.

[0073] Alternatively, a circular groove 411 can be formed on the inner extension 32, and the stabilizing part 41 can be a column with the same diameter as the circular groove 411. The connection between the side gear 3 and the stabilizing part 41 can also be achieved in other ways, such as the side gear 3 being connected to a transmission rod, the end of the transmission rod located inside the housing 1 extending beyond the side gear 3 and being inserted into the stabilizing part 41; one of the ends of this transmission rod and the stabilizing part 41 has a circular groove 411, and the other is a column with the same diameter as the circular groove 411. This solution belongs to the case of indirect coupling between the side gear 3 and the stabilizing member 4. The stabilizing part 41 supports the side gear 3 by being inserted into the transmission rod and the transmission rod being connected to the side gear 3. At the same time, the circular groove 411 and the column with the same diameter can achieve radial limiting of the transmission rod by the stabilizing member 4, thereby achieving radial limiting of the side gear 3.

[0074] Furthermore, a lubrication groove 5 is provided on the inner wall of the stabilizing part 41; a stop 413 is provided at the inner end of the stabilizing part 41, and the stop 413 is configured to block the side gear 3 axially; the stabilizing part 41 and the side gear 3 or the transmission rod have relative rotation, and the lubrication groove 5 and the lubricating oil in the lubrication groove 5 can effectively reduce wear; the stop 413 can axially limit the side gear 3, further increasing the stability of the side gear 3.

[0075] To be more specific, such as Figure 2 , 6 As shown in Figures 7 and 9-11, the housing 1 includes an upper half 11 and a lower half 12, which are connected by screws. The main gear 2 is located in the lower half 12, and the side gears 3 are located between the upper half 11 and the lower half 12. An upper half annular groove 111 is provided on the upper half 11, and a lower half annular groove 121 is provided on the lower half 12. The upper half 11 and the lower half 12 are connected by screws. After the two are connected, the upper half annular groove 111 and the lower half annular groove 121 are combined to form the annular groove. The housing 1 is a split type, which facilitates the installation of the side gears 3. The stabilizer 4 is inserted into the upper half 11 of the housing 1. The stabilizer 4 or the housing 1 is provided with a protruding rotation limiting rod 8. The other side of the stabilizer 4 or the housing 1 is provided with a rotation limiting hole 7. The rotation limiting rod 8 is inserted into the rotation limiting hole 7 and configured to limit the rotation of the stabilizer 4 relative to the housing 1. The stabilizer 4 and the housing 1 are detachably connected. The advantage of this is that it ensures that the stabilizer 4 is stationary in the circumference while making the installation of the side gear 3 more convenient. In this embodiment, the upper end wall of the upper half 11 has a boss 112 extending downward. The rotation limiting hole 7 is opened on the lower surface of the boss 112. The rotation limiting rod 8 protrudes from the stabilizer 4 and extends upward and is inserted into the rotation limiting hole 7. The rotation limiting rod 8 is a hexagonal rod and the rotation limiting hole 7 is a hexagonal slot.

[0076] Alternatively, a rotation-limiting rod 8 can be protruding downwards from the upper inner wall of the upper half 11, and a rotation-limiting hole 7 can be opened on the stabilizing part 4, allowing the two to be inserted together, such as... Figure 12-14As shown; or, the stabilizer 4 is integrally formed with the housing 1, and after the stabilizer 4 is integrally formed with the housing 1, it also achieves circumferential staticity with the housing 1. Alternatively, the stabilizer 4 is designed as a split piece, with half of the stabilizer 4 formed on the upper half 11, and the other half of the stabilizer 4 is then fastened on during installation; or, the stabilizer 4 is directly fixed to the housing 1 by at least two screws.

[0077] More specifically, the main gear 2 is connected to a rotating component 22. The main gear 2 is equipped with a main bearing component 21, and the rotating component 22 is equipped with a rotating bearing component 221. Both the main bearing component 21 and the rotating bearing component 221 are installed in the lower half 12 to ensure the stability of the main gear 2 and prevent wobbling. The support at two points determines the stability of one axis. The side gear 3 is supported on both sides to reduce the overall volume of the gearbox. Of course, a transmission rod can also be connected to the main gear 2, making the gearbox an intermediate transmission component in a transmission system.

[0078] The main bearing component 21 and the rotating bearing component 221 are installed into the lower half of the lower half 12 from the top and bottom, respectively. The main bearing component 21 is also a sliding bearing, the rotating component 22 is a lead screw, and the rotating bearing is a rolling bearing. The two bearing components are installed into the lower half 12 from two directions to maintain the stability of the main bearing and to facilitate installation. Furthermore, since the housing 1 is designed to be split into upper and lower parts, the main bearing component 21 and the rotating bearing component 221 can be installed into the lower half 12 in two directions.

[0079] The stabilizer 4 is separated from the main gear 2, and the main gear 2 is installed at the lower end of the housing 1, while the stabilizer 4 is installed at the upper end of the housing 1. There is a gap between the stabilizer 4 and the main gear 2, and they are not directly connected or connected by a single shaft. This is because the stabilizer 4 does not need to provide further limiting support for the main gear 2, and separating the stabilizer 4 from the main gear 2 can save costs and reduce wear.

[0080] In this embodiment, both the side gear 3 and the main gear 2 are bevel gears. Each side gear 3 meshes with the main gear 2. When applied to a single-motor lifting table, the motor drives one of the transmission rods to rotate, and the side gear 3 connected to it rotates together, driving the main gear 2 to rotate. The main gear 2 drives the lead screw to rotate on one hand, and transmits power to the other side gears 3 on the other hand, so that all the transmission rods on the gearbox rotate, thereby realizing multi-directional transmission, or four-directional transmission, on the lifting table.

[0081] In addition, the number of side gears 3 can be two or three; when there are three side gears 3, the stabilizer 4 is T-shaped and has three stabilizing parts 41; the stabilizer 4 can also be cross-shaped, but one of the stabilizing parts 41 needs to be left empty. When there are two side gears 3, the stabilizer 4 is L-shaped and has two stabilizing parts 41; the stabilizer 4 can also be T-shaped or cross-shaped, simply by leaving the corresponding stabilizing parts 41 empty.

[0082] like Figure 15-17 As shown, an L-shaped single-motor height-adjustable desk is provided, wherein the multi-directional transmission gearbox has two side gears 3; the L-shaped single-motor height-adjustable desk has an L-shaped tabletop 13, and an L-shaped table frame 14 is provided below the L-shaped tabletop 13. The L-shaped table frame 14 includes three lifting columns 15 and transmission rods 16 connected between the three lifting columns 15. The multi-directional transmission gear is disposed in the upper end of the lifting column 15 located at the corner to connect two transmission rods 16, and a motor 9 is connected to one of the transmission rods 16.

Claims

1. A multi-directional transmission gearbox, characterized in that: The device includes a housing, within which a main gear is rotatably mounted. The housing also contains at least two rotatably mounted side gears, with adjacent side gears spaced apart and each side gear meshing with the main gear. The axes of at least two side gears are staggered. The outer section of each side gear is supported by the housing, and a stabilizing element is located on the inner side of each side gear. Each side gear is directly or indirectly coupled to the stabilizing element, and the side gear and the stabilizing element are rotatably mounted relative to each other. The stabilizing element is circumferentially stationary within the housing and is configured to support the side gear at its inner end and restrict radial swaying.

2. The multi-directional transmission gearbox according to claim 1, characterized in that: Each side gear has a side bearing at its outer end, and the side gear is connected to the housing through the side bearing.

3. The multi-directional transmission gearbox according to claim 2, characterized in that: The side gear includes an outer extension that extends outward toward the housing body. The outer extension is cylindrical, and a side bearing is fitted onto the outer extension. The outer extension has a transmission insertion hole, which is configured to allow a transmission rod to be inserted into the side gear.

4. The multi-directional transmission gearbox according to claim 2 or 3, characterized in that: The side bearing is a sliding bearing, and a lubrication groove is provided on the side bearing.

5. The multi-directional transmission gearbox according to claim 4, characterized in that: The housing has an annular groove, and the side bearing components are installed in the annular groove.

6. The multi-directional transmission gearbox according to claim 5, characterized in that: The housing consists of an upper part and a lower part. The upper part has an upper annular groove, and the lower part has a lower annular groove. The upper part and the lower part are connected by screws. After the two are connected, the upper annular groove and the lower annular groove are combined to form the annular groove.

7. The multi-directional transmission gearbox according to claim 1, characterized in that: The stabilizing component includes the same number of stabilizing parts as the side gears, and the stabilizing parts are oriented in the same direction as the axial direction of their corresponding side gears and are coaxial. The stabilizing parts are inserted into and fitted with the side gears.

8. The multi-directional transmission gearbox according to claim 7, characterized in that: There are four side gears, each arranged around the circumference of the main gear and each side gear facing a different direction; the stabilizing element is cross-shaped and has four stabilizing parts.

9. The multi-directional transmission gearbox according to claim 7, characterized in that: The side gear includes an inner extension extending toward the housing, which is engaged with a stabilizing part; one of the inner extension and the stabilizing part has a circular groove, and the other is a cylinder with the same diameter as the circular groove.

10. The multi-directional transmission gearbox according to claim 7, characterized in that: The side gear is connected to a transmission rod, the end of which, located inside the housing, extends beyond the side gear and is inserted into a stabilizing part; one of the ends of the transmission rod and the stabilizing part has a circular groove, and the other is a column with the same diameter as the circular groove.

11. The multi-directional transmission gearbox according to claim 7, characterized in that: There are three side gears, and the stabilizing element is T-shaped and has three stabilizing parts.

12. The multi-directional transmission gearbox according to claim 7, characterized in that: There are two side gears, and the stabilizing element is L-shaped and has two stabilizing parts.

13. The multi-directional transmission gearbox according to claim 7, characterized in that: The stabilizing part is sleeve-shaped, and a lubrication groove is provided on the inner wall of the stabilizing part; the inner end of the stabilizing part has a stop, which is configured to block the side gear along the axial direction of the side gear.

14. The multi-directional transmission gearbox according to claim 1, characterized in that: The housing consists of an upper part and a lower part, which are connected by screws. The main gear is located in the lower part, and the side gears are located between the upper and lower parts.

15. The multi-directional transmission gearbox according to claim 14, characterized in that: The main gear is connected to a rotating component, and the main gear is equipped with a main bearing component. The rotating component is equipped with a rotating bearing component, and both the main bearing component and the rotating bearing component are installed in the lower half of the component.

16. The multi-directional transmission gearbox according to claim 15, characterized in that: The main bearing assembly and the rotating bearing assembly are installed into the lower half of the lower half from the top and bottom, respectively.

17. The multi-directional transmission gearbox according to claim 1, 7, or 14, characterized in that: The stabilizing components are integrally molded with the housing.

18. The multi-directional transmission gearbox according to claim 1, 7, or 14, characterized in that: The stabilizer is plugged into the housing. The stabilizer or housing has a protruding rotation limiting rod. The other side of the stabilizer or housing has a rotation limiting hole. The rotation limiting rod is inserted into the rotation limiting hole and configured to limit the rotation of the stabilizer relative to the housing.

19. The multi-directional transmission gearbox according to claim 18, characterized in that: The rotation limiting rod is a hexagonal rod, and the rotation limiting hole is a hexagonal slot.

20. The multi-directional transmission gearbox according to claim 1, characterized in that: The stabilizing component is installed separately from the main gear, with the main gear installed at the lower end of the housing and the stabilizing component installed at the upper end of the housing.

21. The multi-directional transmission gearbox according to claim 1, characterized in that: Both the side gear and the main gear are bevel gears.

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