Synchronous transmission triggering structure of double-stand-column gas spring lifting table

Abstract

The utility model discloses a synchronous transmission trigger structure of a double-stand-column gas spring lifting table, which comprises a transmission rod rotationally matched at the top ends of two lifting stand columns, and a pressing plate fixed on the transmission rod and used for driving the transmission rod to rotate by external force so as to synchronously press the free end of a piston rod of a gas spring in each lifting stand column, two axial limiting sleeves for axially limiting the pressing plate and the table plate supporting frame are arranged at the two ends of the transmission rod, and the table plate supporting frame is provided with a structure allowing the axial limiting sleeves to enter and be in running fit with the axial limiting sleeves; each axial limiting sleeve is in a step shape, the two end faces of the large-diameter section are the limiting face of the pressing plate and the limiting face of a vertical plate of the table plate supporting frame respectively, an arc-shaped groove with an upward-inclined notch is formed in the vertical plate of the table plate supporting frame, and the arc face of the small-diameter section is arranged in the arc-shaped groove with a baffle on the top in a rotating fit mode. The transmission rod and related parts can be preassembled into a whole and then assembled and fixed with the supporting frame of the lifting table, and the assembling process is simple, convenient and fast.

Description

Technical Field

[0001] This utility model relates to the field of intelligent furniture technology, specifically to a synchronous transmission triggering structure for a double-column gas spring lifting table. Background Technology

[0002] Adjustable desks, whose legs are raised and lowered by gas springs, still have many application scenarios and a large market demand because they do not require an electric drive mechanism.

[0003] In existing gas spring lifting tables, the structure where the two columns are driven by their own gas springs is relatively simple and has a relatively low material cost compared to the structure that uses gas springs plus steel wire ropes, pulley blocks, or gear sets for auxiliary drive.

[0004] However, the existing synchronous transmission triggering structure of the double-column gas spring lifting table still has the following shortcomings: the components need to be installed and fixed to the table support frame one by one, and the assembly process is complicated and cumbersome. It is difficult to balance the flexibility of the transmission rod rotation, i.e. the sensitivity of the trigger plate pressing, and the certainty of the axial limit of the transmission rod, i.e. the certainty that the trigger plate will not shift axially when pressed. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a synchronous transmission triggering structure for a double-column gas spring lifting table, which can pre-assemble the transmission rod and related components into a whole and then assemble and fix it with the support frame of the lifting table, and the assembly process is simple, convenient and quick.

[0006] The technical solution of this utility model is to provide a synchronous transmission triggering structure for a double-column gas spring lifting table, including a transmission rod rotatably engaged at the top of the two lifting columns, and a pressing plate fixed on the transmission rod and used for external force to drive the transmission rod to rotate and synchronously press the free end of the gas spring piston rod in each lifting column; the transmission rod has two axial limiting sleeves at both ends, which axially limit the pressing plate and the table support frame, and the table support frame has a structure for the axial limiting sleeves to enter and rotate.

[0007] With the above structure, the synchronous transmission triggering structure of the double-column gas spring lifting table of this utility model has the following advantages: the transmission rod and related components such as the pressing plate and the two axial limiting sleeves at each end can be pre-assembled as a whole, and then assembled and fixed with the support frame of the lifting table. For example, the axial limiting sleeves are embedded and rotated to fit, the assembly process is simple, convenient and quick, and relatively saves assembly costs. Moreover, due to the rotational fit, the transmission rod can rotate flexibly, that is, the pressing sensitivity of the pressing plate can be ensured. Furthermore, since the axial limiting sleeves can axially limit the pressing plates and the table support frame, the axial limit determination of the transmission rod can be ensured, that is, no axial displacement occurs when the pressing plate is pressed. The above two are well balanced.

[0008] Furthermore, each axial limiting sleeve is stepped, with the two ends of the large-diameter section serving as the limiting surface for the pressing plate and the limiting surface for a vertical plate of the table support frame, respectively. The vertical plate of the table support frame has an upward-sloping arc-shaped groove. The arc surface of the small-diameter section rotates and fits within the arc-shaped groove with a baffle at the top. With this structure, simply pressing the small-diameter arc surfaces of the two pairs of four axial limiting sleeves of the assembled synchronous transmission trigger structure down to the bottom of their respective upward-sloping arc-shaped grooves allows for rotational engagement and axial limiting. This further ensures a simple, convenient, and quick assembly process, saves assembly costs, and improves the pressing sensitivity and axial position certainty of the pressing plate.

[0009] Furthermore, the transmission rod has a polygonal cross-section, and the bottom of each axial limiting sleeve has a horizontally cut opening. The polygonal inner hole of the axial limiting sleeve engages with the polygonal transmission rod. The inner wall of the axial limiting sleeve has a radially arc-shaped protrusion that provides axial limiting. At the position of the transmission rod engaging with each axial limiting sleeve, there is a first annular groove for the radially arc-shaped protrusion to be inserted for axial limiting. With this structure, each axial limiting sleeve does not need to be fitted from the end of the transmission rod, ensuring quick, convenient, and reliable assembly of the axial limiting sleeve and transmission rod. It also makes the axial limiting structure of the axial limiting sleeve and transmission rod itself quick, convenient, and reliable by eliminating the need for additional set screws. This further ensures a simple, convenient, and quick assembly process, saves assembly costs, and improves the pressing sensitivity and axial position certainty of the pressing plate.

[0010] Furthermore, the cross-section of the transmission rod is a regular hexagon, and the four sides of the inner hole of the axial limiting sleeve engage with the upper four sides of the transmission rod. This structure makes the engagement and assembly of the inner hole of the axial limiting sleeve with the transmission rod faster, more convenient, and more reliable.

[0011] Furthermore, the tabletop support frame includes two crossbeams and a first U-shaped plate with an upward-facing opening at each end of the crossbeams, fixed to the top of the movable tube of each lifting column. The arc-shaped groove is provided on the two vertical plates of the first U-shaped plate. The tabletop support frame also includes an L-shaped support plate with an inward included angle pointing downward at each end of the two crossbeams. The vertical plate of the L-shaped support plate has a U-shaped groove with an downward-facing opening, and each end of the transmission rod has a second annular groove that rotatably engages with the top wall of the U-shaped groove. With the above structure, the connection between this synchronous transmission triggering structure and the tabletop support and lifting columns is more robust and reliable, and the relative rotation is more flexible and stable.

[0012] Furthermore, the pressing plate is a second U-shaped plate with its opening facing downwards. The center of the horizontal plate of the second U-shaped plate is the pressing position on the top surface of the free end of the gas spring piston rod. There are two ear plates on one side of the pressing plate. The polygonal hole of each ear plate engages with the polygonal transmission rod for circumferential limiting. The outer side of each ear plate is axially limited by an axial limiting sleeve. With this structure, the circumferential limiting of the pressing plate and the transmission rod, as well as the circumferential limiting of the table support frame, is more stable and reliable. It also provides a larger pressing area on the top of the free end of the gas spring piston rod, resulting in higher pressing sensitivity and accuracy.

[0013] Furthermore, a handle for manually actuating and thus driving the transmission rod to rotate is fixed to at least one end of the transmission rod. With the above structure, the structure for externally driving the transmission rod to rotate is simpler, and the operation of manually driving the transmission rod to rotate is more convenient and reliable. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of a double-column gas spring lifting table that utilizes the synchronous transmission triggering structure of this utility model.

[0015] Figure 2 yes Figure 1 The structural diagram of the tabletop is omitted.

[0016] Figure 3 yes Figure 2 A magnified structural diagram of A in the diagram.

[0017] Figure 4 yes Figure 3 The exploded structure diagram shows the preferred embodiment of the synchronous transmission triggering structure of this utility model and an L-shaped support plate assembled into a whole.

[0018] Figure 5 yes Figure 4 A magnified structural diagram of B in the diagram.

[0019] Figure 6 yes Figure 5 A structural diagram from another angle.

[0020] Figure 7 yes Figure 5 A schematic diagram of the exploded structure, showing the transmission rod, two axial limiting sleeves, and pressing plate after being exposed from a different angle.

[0021] Figure 8 yes Figure 4 Enlarged structural diagram of C (screws, bolts and nuts are not shown in any of the above figures).

[0022] As shown in the figure:

[0023] 1. Lifting column; 11. Movable tube;

[0024] 2. Tabletop support frame, 21. First U-shaped plate, 211. First vertical plate, 2111. Arc-shaped groove, 21111. Notch, 21112. Baffle, 212. Second opening, 22. Crossbeam, 23. L-shaped support plate, 231. Inner angle, 232. Second vertical plate, 233. U-shaped groove, 2331. Third opening, 2332. Top wall;

[0025] 3. Tabletop;

[0026] 4. Transmission rod; 41. First annular groove; 42. Upper quadrilateral; 43. Second annular groove;

[0027] 5. Free end of gas spring piston rod; 51. Top surface;

[0028] 6. Axial limiting sleeve; 61. Large diameter section; 611. Pressing plate limiting surface; 612. Limiting surface of a vertical plate; 62. Small diameter section; 621. Arc surface; 63. First opening; 64. Radial arc protrusion; 65. Square sides of the inner hole.

[0029] 7. Pressing plate, 71. Second U-shaped plate, 711. Fourth opening, 712. Horizontal plate, 713. Third vertical plate, 72. Ear plate, 721. First regular hexagonal hole;

[0030] 8. Handle; 81. Second regular hexagonal hole. Detailed Implementation

[0031] 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.

[0032] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown.

[0033] A preferred embodiment of the synchronous transmission triggering structure of the double-column gas spring lifting table of this utility model includes a transmission rod 4 rotatably engaged with the top of the two lifting columns 1, such as the movable tube 11. The preferred embodiment of the synchronous transmission triggering structure of the double-column gas spring lifting table of this utility model also includes a pressing plate 7 fixed to the transmission rod 4 and used for external force to drive the transmission rod 4 to rotate and synchronously press the free end 5 of the gas spring piston rod in each lifting column 1. Each end of the transmission rod 4 has two axial limiting sleeves 6 that axially limit the pressing plate 7 and the table support frame 2, i.e., two axial limiting sleeves 6 at each end, for a total of four. The table support frame 2 has a structure for the axial limiting sleeves 6 to enter and rotate. The free end 5 of the gas spring piston rod is also called the valve core tip or valve needle tip. The table support frame 2 can be fixed to the table 3, such as by using multiple screws for fixing.

[0034] Each axial limiting sleeve 6 is stepped, with the two end faces of the large-diameter section 61 being the limiting surface 611 of the pressing plate and the limiting surface 612 of the vertical plate of the table support frame 2, such as the limiting surface of the first vertical plate 211. The table support frame 2 has a structure for the axial limiting sleeve 6 to enter and rotate within it. Specifically, the vertical plate of the table support frame 2, such as the first vertical plate 211, has a notch 21111 that is an upwardly inclined arc-shaped groove 2111. The arc surface 621 of the small-diameter section 62 rotates within the arc-shaped groove 2111 with a baffle 21112 at the top. The limiting surface 611 of the pressing plate can be referred to as the limiting surface of the pressing plate. The limiting surface 612 of the vertical plate can be referred to as the limiting surface of the vertical plate, such as the limiting surface of the first vertical plate 211.

[0035] The transmission rod 4 has a polygonal cross-section. Each axial limiting sleeve 6 has a horizontally cut opening at its bottom, such as a first opening 63. The polygonal inner hole of the axial limiting sleeve 6 engages with the polygonal transmission rod 4. The inner wall of the axial limiting sleeve 6 has a radially arc-shaped protrusion 64 that provides axial limiting. At the position of the transmission rod 4 that engages with each axial limiting sleeve 6, there is a first annular groove 41 for the radially arc-shaped protrusion 64 to be inserted for axial limiting. The cross-section of the transmission rod 4 is preferably a regular hexagon, and the square sides 65 of the inner hole of the axial limiting sleeve 6 engage with the upper square sides 42 of the transmission rod 4.

[0036] The tabletop support frame 2 includes two crossbeams 22 and a first U-shaped plate 21 with an opening (e.g., a second opening 212) facing upwards at each end of the crossbeams 22 and fixed to the top of the movable tube 11 of each lifting column 1. The arc-shaped groove 2111 is provided on the two vertical plates 211 of the first U-shaped plate 21, with one plate at each end, for a total of two plates. The tabletop support frame 2 also includes an L-shaped support plate 23 with an inner included angle 231 facing downwards at each end of the two crossbeams 22. The vertical plate of the L-shaped support plate 23, such as the second vertical plate 232, has a U-shaped groove 233 with an opening (e.g., a third opening 2331) facing downwards. Each end of the transmission rod 4 has a second annular groove 43 that rotatably engages with the top wall 2332 of the U-shaped groove 233. There are two L-shaped support plates 23, one at each end.

[0037] The pressing plate 7 is a second U-shaped plate 71 with an opening such as the fourth opening 711 facing downwards. The center of the horizontal plate 712 of the second U-shaped plate 71 is the pressing position of the top surface 51 of the free end 5 of the gas spring piston rod. There are two ear plates 72 on one side of the pressing plate 7. The polygonal hole of each ear plate 72 fits into the polygonal transmission rod 4 for circumferential limitation. The outer side of each ear plate 72 is axially limited by the axial limiting sleeve 6. The polygonal hole of each ear plate 72, such as the first regular hexagonal hole 721, fits into the polygonal transmission rod 4 for circumferential limitation. The pressing position of the top surface 51 of the free end 5 of the gas spring piston rod can also be referred to as the pressing position of the top surface 51 of the free end 5 of the gas spring piston rod. The bottom surfaces of the two vertical plates of the second U-shaped plate 71 of the pressing plate 7, such as the two third vertical plates 713, can be inclined surfaces that are lower near the transmission rod 4 and higher away from the transmission rod 4, in order to avoid possible interference between the part away from the transmission rod and the first U-shaped plate 21 during the pressing process.

[0038] At least one end of the transmission rod 4 is as follows Figure 2 and Figure 4 One end of the shown figure is fixed with a handle 8 for manually rotating the transmission rod 4. The handle 8 can also be called a toggle plate. Figure 2 and Figure 4 As shown, the fixation of one end of the transmission rod 4 to the handle 8 can be achieved by a polygonal hole in the handle 8, such as a second regular hexagonal hole 81, tightly fitting the polygonal transmission rod 4, such as a regular hexagonal transmission rod 4. Alternatively, it can be a splined hole in the handle (not shown) tightly fitting the splined section at one end of the transmission rod. Another option is to fit a circular hole in the handle (not shown) into the circular section at one end of the transmission rod and then secure it with a locking pin.

[0039] The terms "notch" and "opening" are interchangeable. A baffle 21112 is also called a stop block. A tabletop support frame 2 is also called a table frame.

[0040] like Figures 1 to 8 As shown.

[0041] In a preferred embodiment of the synchronous transmission triggering structure of the double-column gas spring lifting table of this utility model, the working process of driving the gas spring to raise and lower the tabletop 3 of the lifting table is as follows: When the tabletop 3 needs to be raised, the handle 8 is pulled upward to drive the transmission rod 4 to rotate clockwise, which drives the pressing plates 7 at both ends to press the top surface 51 of the free end 5 of their respective gas spring piston rods, so that the gas spring is in a state where it can rise. The tabletop support frame 2 and the tabletop 3 rise slowly under the action of the gas spring. After reaching the predetermined height, the handle 8 is released, and the gas spring stops rising.

[0042] When the tabletop 3 needs to be lowered, the handle 8 is pulled upwards to drive the transmission rod 4 to rotate clockwise, which in turn causes the pressing plates 7 at both ends to press the top surface 51 of the free end 5 of their respective gas spring piston rods, so that the gas spring is in a state where it can be lowered. At the same time, the tabletop 3 is pressed down manually, and after the tabletop 3 is lowered to the predetermined height, the pressing on the tabletop 3 and the handle 8 is released, and the gas spring stops lowering.

[0043] The above preferred embodiments of this utility model are allowed to have variations. For example, the table support frame has a structure for the axial limiting sleeve to be inserted and rotated. In addition to the specific structure described above where the vertical plate of the support frame has an upwardly inclined arc-shaped groove with a small-diameter arc surface rotating in the arc-shaped groove with a baffle at the top, each vertical plate can also have a fixing plate with a lower semi-circular hole and a pressure block with an upper semi-circular hole. The small-diameter arc surface can rotate in conjunction with the circular hole formed by the lower and upper semi-circular holes, and each pressure block with an upper semi-circular hole and the fixing plate with a lower semi-circular hole are fixed by a male and female snap fastener. Alternatively, each vertical plate may have a fixing plate with a lower semicircular hole and a pressure block with an upper semicircular hole. The small-diameter arc surface can rotate and engage with the circular hole formed by the lower and upper semicircular holes. One side of each pressure block with an upper semicircular hole is hinged to one side of the vertical plate, and the other side adopts a magnetic attraction structure, such as a magnet being attracted and fixed to an ordinary carbon steel column. A sleeve of magnetic shielding material can be embedded on the other side of the pressure block, and then an ordinary carbon steel column can be embedded in the sleeve of magnetic shielding material. Similarly, a sleeve of magnetic shielding material can be embedded on the other side of the vertical plate, and then a cylindrical magnet can be embedded in the sleeve of magnetic shielding material. The end face of the ordinary carbon steel column and the end face of the cylindrical magnet can both protrude from the end face of the sleeve of magnetic shielding material.

[0044] For example, the external force driving the transmission rod to rotate the pressing plate can be achieved by installing an electric actuator on the table support frame or the bottom of the table to drive the pressing plate and the transmission rod to rotate; alternatively, a miniature motor can be installed on the table support frame or the bottom of the table, driven by gears or a direct transmission rod, while the pressing plate is still retained. Both the electric actuator and the miniature motor can be remotely controlled to start and stop using existing technology.

[0045] 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.

[0046] 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 synchronous transmission trigger structure of a dual-column gas spring lifting table, comprising a transmission rod rotatably fitted at the top end of two lifting columns, and further comprising a pressing plate fixed on the transmission rod and used for driving the transmission rod to rotate by external force to synchronously press the free end of the gas spring piston rod in each lifting column; characterized in that: The transmission rod has two axial limiting sleeves respectively axially limiting the pressing plate and the table plate support frame, and the table plate support frame has a structure for the axial limiting sleeve to enter and rotate.

2. The synchronous transmission trigger structure of the dual upright column gas spring lifting table according to claim 1, characterized in that: Each axial limiting sleeve is stepped, and the end faces of the large-diameter section are respectively a limiting surface of the pressing plate and a limiting surface of a vertical plate of the table plate support frame, and the vertical plate has an upwardly inclined arc-shaped groove.

3. The synchronous transmission trigger structure of the dual upright column gas spring lifting table according to claim 2, characterized in that: The transmission rod has a polygonal cross section, the bottom of each axial limiting sleeve is a horizontal cutout, the polygonal inner hole of the axial limiting sleeve and the polygonal transmission rod are mutually clamped, and the inner hole wall of the axial limiting sleeve has a radial arc-shaped protrusion for axial limiting, and the position of the transmission rod clamped with each axial limiting sleeve has a first circular annular groove for the radial arc-shaped protrusion to embed for axial limiting.

4. The dual upright gas spring lift table synchronous drive trigger structure of claim 3, wherein: The transmission rod has a hexagonal cross section, and the inner hole of the axial limiting sleeve and the upper part of the transmission rod are mutually clamped.

5. The dual upright gas spring lift table synchronous drive trigger structure of claim 2, wherein: The table plate support frame includes two cross beams and a first H-shaped plate with an upward opening and fixed to the top end of the movable tube of each lifting column, and the arc-shaped groove is arranged on the two vertical plates of the first H-shaped plate; the table plate support frame further includes two L-shaped support plates with an inner downward angle and connected to the two ends of the two cross beams, and the vertical plate of the L-shaped support plate has a downward U-shaped groove, and each end of the transmission rod has a second circular annular groove in rotational cooperation with the top wall of the U-shaped groove.

6. The dual upright gas spring lift table synchronous drive trigger structure of claim 1, wherein: The pressing plate is a second H-shaped plate with a downward opening, the center of the horizontal plate of the second H-shaped plate is a pressing position of the top end surface of the free end of the air spring piston rod, one side of the pressing plate has two ear plates, the polygonal hole of each ear plate is sleeved with the polygonal transmission rod for circumferential limiting, and the outer side of each ear plate is axially limited by the axial limiting sleeve.

7. The dual upright gas spring lift table synchronous drive trigger structure of claim 1, wherein: At least one end of the transmission rod is fixed with a handle for manual driving to drive the transmission rod to rotate.

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