CN109497698B - Lifting mechanism of lifting table - Google Patents

Abstract

The invention discloses a lifting mechanism of a lifting table.A foot is provided with an oblique lifting table leg, and the upper end of the oblique lifting table leg is provided with a telescopic crosspiece; the inclined lifting table legs comprise fixed lower pipes, and lifting upper pipes which slide up and down relative to the fixed lower pipes are arranged in the fixed lower pipes; the telescopic crosspiece comprises an opposite crosspiece and a follow-up crosspiece, and the opposite crosspiece can move left and right along the follow-up crosspiece; the upper end of the lifting upper pipe is provided with a transmission mechanism which simultaneously drives the lifting upper pipe to move up and down and moves left and right relative crosspiece, and the transmission mechanism is in a form that the distance of left and right movement of the relative crosspiece is the same as the distance of left and right movement of the follow-up crosspiece caused by the lifting upper pipe. When the novel lifting chair is inclined and ascends, the crosspieces can be simultaneously aligned, the using effect is good, and the use is convenient.

Description

Lifting mechanism of lifting table

Technical Field

The invention relates to a lifting mechanism of a lifting table.

Background

The existing lifting mechanism for inclined lifting has the defects that the crosspiece can not be righted when the existing lifting mechanism is inclined and lifted, so that the use is inconvenient, and the existing table leg has a single type.

Disclosure of Invention

The invention aims to provide a lifting mechanism of a lifting table, which can simultaneously return rungs when the lifting table is obliquely lifted and has good use effect.

The technical solution of the invention is as follows:

a lifting mechanism of a lifting table is characterized in that: comprises a bottom foot, wherein an oblique lifting table leg is arranged on the bottom foot, and a telescopic crosspiece is arranged at the upper end of the oblique lifting table leg; the inclined lifting table legs comprise fixed lower pipes, and lifting upper pipes which slide up and down relative to the fixed lower pipes are arranged in the fixed lower pipes; the telescopic crosspiece comprises an opposite crosspiece and a follow-up crosspiece, and the opposite crosspiece can move left and right along the follow-up crosspiece; the upper end of the lifting upper pipe is provided with a transmission mechanism which simultaneously drives the lifting upper pipe to move up and down and moves left and right relative crosspiece, and the transmission mechanism is in a form that the distance of left and right movement of the relative crosspiece is the same as the distance of left and right movement of the follow-up crosspiece caused by the lifting upper pipe.

The transmission mechanism comprises a gear box fixedly arranged at the upper end of the lifting upper pipe, a first gear, a second gear and a third gear are arranged in the gear box, the first gear and the second gear are respectively meshed with the third gear at an angle of 90 degrees, the first gear and the fourth gear are coaxial, the fourth gear is meshed with a fifth gear, and the fifth gear is matched with a positive thread trapezoidal screw rod; the second gear is connected with the crank, the third gear is fixed at the upper end of a screw rod arranged in the upper lifting pipe, and a screw rod nut matched with the screw rod is fixedly arranged on the lower fixing pipe; through the relation of gear ratio and lead screw pitch ratio, guarantee that the distance that removes about relative crosspiece is the same with the distance that removes about the follow-up crosspiece that causes owing to go up pipe elevating movement in the lift.

The working process is as follows: when the rotating device rotates clockwise, the second gear also rotates clockwise to drive the third gear to rotate anticlockwise, so that the first gear rotates clockwise, meanwhile, the screw rod rotates anticlockwise to drive the inclined lifting mechanism to move upwards, and the lifting upper pipe also moves upwards relative to the fixed lower pipe; the first gear and the fourth gear rotate coaxially, the fourth gear also rotates clockwise due to clockwise rotation of the first gear, so that the fifth gear rotates anticlockwise, the fifth gear moves leftwards relative to the positive thread trapezoidal screw rod due to non-rotation of the positive thread trapezoidal screw rod, the follow-up crosspiece moves leftwards when the lifting upper pipe rises obliquely, the gear set mechanism is fixed on the follow-up crosspiece, and through the relationship between the gear ratio and the screw pitch ratio of the screw rod, a displacement curve of the follow-up crosspiece moving leftwards and a displacement curve of the gear set mechanism relative to the relative crosspiece can be coincided, so that the front and back displacements of the relative crosspiece and the bottom foot can be kept unchanged;

conversely, when the rotating device rotates anticlockwise, the lifting upper pipe moves downwards relative to the fixed lower pipe.

When the novel lifting chair is inclined and ascends, the crosspieces can be simultaneously aligned, the using effect is good, and the use is convenient.

Drawings

The invention is further illustrated by the following figures and examples.

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Fig. 2 is a perspective view of the embodiment of fig. 1.

Fig. 3 is a schematic view of the transmission mechanism.

Detailed Description

A lifting mechanism of a lifting table comprises a bottom foot 1, wherein an oblique lifting table leg is arranged on the bottom foot, and a telescopic crosspiece is arranged at the upper end of the oblique lifting table leg; the slant lifting table legs comprise fixed lower pipes 2, and lifting upper pipes 4 which slide up and down relative to the fixed lower pipes are arranged in the fixed lower pipes; the telescopic crosspiece comprises a relative crosspiece 5 and a follow-up crosspiece 7, and the relative crosspiece can move left and right along the follow-up crosspiece; the upper end of the lifting upper pipe is provided with a transmission mechanism which simultaneously drives the lifting upper pipe to move up and down and moves left and right relative crosspiece, and the transmission mechanism is in a form that the distance of left and right movement of the relative crosspiece is the same as the distance of left and right movement of the follow-up crosspiece caused by the lifting upper pipe.

The transmission mechanism comprises a gear box fixedly arranged at the upper end of the lifting upper pipe, a first gear 12, a second gear 13 and a third gear 14 are arranged in the gear box, the first gear and the second gear are respectively meshed with the third gear 14 at an angle of 90 degrees, the first gear and the fourth gear 15 are coaxial, the fourth gear is meshed with a fifth gear 16, the fifth gear 16 is matched with a positive thread trapezoidal screw rod 8, and the positive thread trapezoidal screw rod is fixedly connected with a relative crosspiece; the second gear is connected with a hand crank 11 (or a rotating device in other forms such as power drive and the like), the third gear is fixed at the upper end of a screw rod 10 arranged in the lifting upper pipe, and a screw rod nut (in a form of a lower threaded pipe 9) matched with the screw rod is fixedly arranged on the fixed lower pipe 2; through the relation of gear ratio and lead screw pitch ratio, guarantee that the distance that removes about relative crosspiece is the same with the distance that removes about the follow-up crosspiece that causes owing to go up pipe elevating movement in the lift. The gear box and the upper elevator tube 4 remain fixed.

The figure also shows a gear set mechanism 6 (comprising a fourth gear 15 and a fifth gear 16) and an inclined lifting mechanism 3 (comprising a lower threaded pipe 9, a screw rod 10, a gear box, a hand crank 11 and the like).

When hand crank 11 (or other forms of rotating device such as power drive) clockwise, gear 13 also clockwise rotates, drives gear 14 anticlockwise rotation to gear 12 clockwise rotates, and lead screw 10 anticlockwise rotates simultaneously, drives the upward movement of slope elevating system, and the fixed lower tube 2 of upper tube 4 relative is upward moved in the lift. The gear 12 and the gear 15 rotate coaxially, the gear 12 rotates clockwise to drive the gear 15 to rotate clockwise, the gear 16 rotates anticlockwise, the gear 16 moves leftwards relative to the positive thread trapezoidal screw 8 because the positive thread trapezoidal screw 8 does not rotate, the follow-up crosspiece 7 moves leftwards when the lifting upper tube 4 ascends obliquely, the gear set mechanism is fixed on the follow-up crosspiece 7, and the displacement curve of the follow-up crosspiece 7 moving leftwards and the displacement curve of the gear set mechanism moving relative to the relative crosspiece 5 can be coincided through the relationship between the gear ratio and the screw pitch ratio. It is ensured that the back and forth displacement of the counter rail 5 and the foot 1 can be kept constant.

Conversely, when the hand crank 11 (or other rotating means such as power drive) rotates counterclockwise, the lifting upper tube 4 moves downward relative to the fixed lower tube 2.

Claims (2)

1. A lifting mechanism of a lifting table is characterized in that: comprises a bottom foot, wherein an oblique lifting table leg is arranged on the bottom foot, and a telescopic crosspiece is arranged at the upper end of the oblique lifting table leg; the inclined lifting table legs comprise fixed lower pipes, and lifting upper pipes which slide up and down relative to the fixed lower pipes are arranged in the fixed lower pipes; the telescopic crosspiece comprises an opposite crosspiece and a follow-up crosspiece, and the opposite crosspiece can move left and right along the follow-up crosspiece; the upper end of the lifting upper pipe is provided with a transmission mechanism which simultaneously drives the lifting upper pipe to move up and down and moves left and right relative to the crosspiece, and the transmission mechanism is in a form that the distance of left and right movement of the relative crosspiece is the same as the distance of left and right movement of the follow-up crosspiece caused by the lifting upper pipe;

the transmission mechanism comprises a gear box fixedly arranged at the upper end of the lifting upper pipe, a first gear, a second gear and a third gear are arranged in the gear box, the first gear and the second gear are respectively meshed with the third gear at an angle of 90 degrees, the first gear and the fourth gear are coaxial, the fourth gear is meshed with a fifth gear, and the fifth gear is matched with a positive thread trapezoidal screw rod; the second gear is connected with the rotating device, the third gear is fixed at the upper end of a screw rod arranged in the upper lifting pipe, and a screw rod nut matched with the screw rod is fixedly arranged on the lower fixing pipe; the distance of left and right movement relative to the crosspiece is ensured to be the same as the distance of left and right movement of the follow-up crosspiece caused by the lifting motion of the lifting upper tube through the relationship of the gear ratio and the screw pitch ratio of the screw rod;

the working process is as follows: when the rotating device rotates clockwise, the second gear also rotates clockwise to drive the third gear to rotate anticlockwise, so that the first gear rotates clockwise, meanwhile, the screw rod rotates anticlockwise to drive the inclined lifting mechanism to move upwards, and the lifting upper pipe also moves upwards relative to the fixed lower pipe; the first gear and the fourth gear rotate coaxially, the fourth gear also rotates clockwise due to clockwise rotation of the first gear, so that the fifth gear rotates anticlockwise, the fifth gear moves leftwards relative to the positive thread trapezoidal screw rod due to non-rotation of the positive thread trapezoidal screw rod, the follow-up crosspiece moves leftwards when the lifting upper pipe rises obliquely, the gear set mechanism is fixed on the follow-up crosspiece, and through the relationship between the gear ratio and the screw pitch ratio of the screw rod, a displacement curve of the follow-up crosspiece moving leftwards and a displacement curve of the gear set mechanism relative to the relative crosspiece can be coincided, so that the front and back displacements of the relative crosspiece and the bottom foot can be kept unchanged;

conversely, when the rotating device rotates anticlockwise, the lifting upper pipe moves downwards relative to the fixed lower pipe.

2. The elevating mechanism of an elevating table as set forth in claim 1, wherein: the rotating device is a crank or a power-driven or other rotating device.

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