CN214711147U

CN214711147U - Lifting table

Info

Publication number: CN214711147U
Application number: CN202022888286.5U
Authority: CN
Inventors: 李志�
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-12-06
Filing date: 2020-12-06
Publication date: 2021-11-16
Anticipated expiration: 2030-12-06

Abstract

The utility model provides a need not to adjust lift table of supporting legs height, include: at least two support legs, each support leg comprising a base and a support bar; the table body comprises a support frame and a table top arranged on the support frame; each supporting leg is provided with a sliding device which at least comprises an upper sliding piece and a lower sliding piece, the supporting rod is used as a sliding track, can slide up and down along the supporting rod and is arranged on the table body; the driving device comprises a power device, a transmission device and a winding piece which are connected in a step-by-step transmission manner; each supporting leg is provided with a pulley device which comprises a flexible cable and a plurality of pulleys, one end of the flexible cable is connected with the upper end of the supporting leg or the table body, the pulley is wound in the middle of the flexible cable, and the other end of the flexible cable is connected with and wound on the winding piece. The power device drives the winding piece to rotate, the flexible cable wound on the winding piece is tightened or released, and the pulley device pulls the table body to move up and down under the guiding action of the sliding device. The lifting table is simple in structure, low in manufacturing cost and good in stability.

Description

Lifting table

Technical Field

The utility model relates to a height-adjustable lifting table, which belongs to the technical field of tables.

Background

The lifting table is a height-adjustable table, and in the prior art, the height of the supporting legs is generally adjusted to lift the table top arranged on the tops of the supporting legs. Each supporting foot of the structure generally comprises at least two upright post components which can move relatively, and the screw rod lifting mechanism has a complex structure, so the manufacturing cost is high. In the prior art, a lifting table with non-telescopic supporting legs (upright posts) is disclosed, for example, in the invention patent of Chinese publication No. CN111109842A, the upright posts need to be installed on a wall surface or other objects, so that the movement and the use of the lifting table are limited; the upright post and the sliding part have complex structures, so the manufacturing cost is high; the pulling force that upwards promotes is single, and the desktop only partially supports, easily inclines when the atress is uneven.

Disclosure of Invention

In order to overcome the problem of the lifting table, the utility model provides a lifting table without adjusting the height of the supporting legs, which has simple structure, low manufacturing cost and good stability. The construction of the lifting table of the present invention is explained as follows.

The lower part of each supporting leg is a base supported on the ground, the upper part of each supporting leg is a rod-shaped supporting rod fixedly connected to the base, and the two supporting legs are fixedly connected through a cross beam, so that the relative positions of the supporting legs are kept fixed, and the supporting legs can provide stable support for the whole table.

The table body comprises a support frame and a table top, and the table top is arranged above the support frame.

Each support leg is provided with a sliding device which at least comprises an upper sliding piece and a lower sliding piece, and the upper sliding piece is positioned above the lower sliding piece. Each upper sliding piece or lower sliding piece comprises a bracket and a small wheel or a sliding block connected with the bracket, and each sliding device is arranged on the table body through the bracket. The small wheel or the sliding block of the upper sliding piece leans against the rear surface of the supporting rod, the small wheel or the sliding block of the lower sliding piece leans against the front surface of the supporting rod, and the upper sliding piece and the lower sliding piece use the supporting rod as a sliding track and cling to the supporting rod to slide up and down. The small wheel or the sliding block, the bracket or the table body surround the supporting rod together, so that the small movable range of the upper sliding piece and the lower sliding piece relative to the supporting rod in the horizontal direction is limited, and the upper sliding piece and the lower sliding piece are prevented from derailing from the supporting rod. Therefore, the sliding device enables the table body to only slide up and down along the length direction of the supporting rod, and provides supporting force for the horizontal direction of the table body.

And each driving device comprises a power device, a transmission device and at least one winding piece which are sequentially connected in a transmission manner, and the winding pieces are arranged on the cross beam or the table body. The power device is a motor or a rocking handle and is used for providing lifting power. The transmission device is a speed reduction transmission device which reduces the speed of the rotation of the input shaft through an internal transmission part (worm and gear) and then transmits the rotation to the output shaft, or a transmission device which directly transmits the rotation of the input shaft to the output shaft (such as a hand crank of a clothes hanger). The transmission device has a reverse self-locking function, only can carry out transmission from the input shaft to the output shaft, and is in a self-locking state when the transmission is carried out from the output shaft to the input shaft (when the input shaft does not have power, the torque acted on the output shaft cannot be transmitted to the input shaft). At least one winding member is connected to the output shaft of the transmission, the winding member being of generally cylindrical configuration with a recess.

Each supporting leg is correspondingly provided with a pulley device, and each pulley device comprises a flexible cable, 0 or at least one movable pulley and 0 or at least one fixed pulley. The movable pulley is arranged on the table body, and the fixed pulley is arranged at the upper end of the supporting leg or on a cross beam at the upper end. The flexible cable is one of a steel cable, a rope, a belt and a chain, one end (fixed end) of the flexible cable is connected with the upper end of the corresponding supporting leg or the table body or the cross beam, the other end (free end) of the flexible cable is connected with and wound on the winding piece, and the middle of the flexible cable is wound around a plurality of pulleys of the pulley device. The pulley gear provides upward pulling force for the table body and pulls the table body to do lifting movement.

When the pulley device only comprises one flexible cable, the flexible cable directly provides tension for the table body; when the pulley device comprises a flexible cable and a fixed pulley, the pulley device is a type of fixed pulley; when the pulley device comprises a flexible cable and a movable pulley, the pulley device is a movable pulley; when the pulley device comprises a flexible cable, at least one fixed pulley and at least one movable pulley, the pulley device is a pulley block. The fixed pulley provides upward supporting force for the flexible cable, the movable pulley provides upward pulling lifting force for the table body, and the flexible cable is in a tensioned state under the action of gravity of the table body. At least two pulley gear provide the support for table body both sides, therefore the table body is difficult for the slope.

When only one driving device is arranged, the free ends of the flexible cables of different pulley devices are connected and wound on the same winding piece or are respectively wound on different coaxial winding pieces; when at least two driving devices are provided, the flexible cables of different pulley devices are respectively connected with and wound on the winding parts of different driving devices; the winding part rotates to enable each flexible cable to be tightened or released simultaneously, the tensile force of the flexible cables of the pulley device acts on two sides of the table body, and the two sides of the table body move up and down synchronously.

When the power device is an electric motor, the transmission device is a speed reduction transmission device using a worm wheel and a worm, and the controller is used for controlling the rotary motion of the electric motor and is connected with an ascending key, a descending key, the electric motor and an upper position sensor and a lower position sensor. The controller detects signals of the position sensor and signals of the ascending key or the descending key, controls the motor to rotate forwards, reversely or stop rotating, further drives the winding piece to rotate, and enables each flexible cable wound on the winding piece to be tightened or released simultaneously. When the power device is a rocking handle, the rocking handle is rocked to rotate, the transmission device and the winding piece are driven to rotate, and then each flexible cable wound on the winding piece is simultaneously tightened or released.

When the power device does not output power, the transmission device is in a reverse self-locking state, the winding piece stops rotating, and therefore the pulley device pulls the table body to hover at a certain height.

The lifting table with the structure has the advantages that the supporting rods are not required to be adjusted in height, the lifting mechanism is provided with the flexible cables and the pulleys, and the lifting table is simple in structure, low in manufacturing cost and good in stability.

Drawings

Fig. 1 is a perspective view of the elevating table structure in embodiment 1.

Fig. 2 is a schematic structural view of a pulley device of the elevating table of embodiment 1.

Fig. 3 is a schematic structural view of a pulley device of the elevating table of embodiment 2.

Fig. 4 is a schematic structural view of a pulley device of the elevating table of embodiment 3.

Fig. 5 is a schematic structural view of a pulley device of the elevating table of embodiment 4.

Fig. 6 is a schematic structural view of a pulley device of the elevating table of the embodiment 5.

Fig. 7 is a schematic structural view of a pulley device of the elevating table of embodiment 6.

Fig. 8 is a schematic structural view of a pulley device of the elevating table of embodiment 7.

Fig. 9 is a perspective view of the elevating table of embodiment 8.

Fig. 10 is a schematic structural view of a pulley device of the elevating table of embodiment 8.

Fig. 11 is a schematic structural view of a pulley device of the elevating table of the embodiment 9.

Fig. 12 is a perspective view of the elevating table according to embodiment 10.

Description of reference numerals: 1. Supporting legs; 11. a support bar; 12. a base; 2. a cross beam; 3. a sliding device; 31. an upper slider; 32. a lower slider; 301. a small wheel; 302. a support; 4. a table body; 41. a support frame; 42. a desktop; 5. a pulley device; 51. a fixed pulley; 52. a movable pulley; 53. a flexible cable; 6. a drive device; 61. a power plant; 62. a transmission device; 63. a winding member; 611. an electric motor; 612. a handle is rocked; 7. and a shaft support.

Detailed Description

Embodiment 1 of the present invention will be described below with reference to fig. 1 and 2.

As shown in figure 1, the lower part of each supporting leg 1 is a base 12 which is horizontally supported on the ground, the upper part is a rod-shaped supporting rod 11, the two supporting legs 1 are fixedly connected through a cross beam 2, and the supporting legs 1 can stand on the ground. The table body 4 comprises a support frame 41 and a table top 42, and the table top 42 is installed above the support frame 41. The two legs 1 are provided with a slide 3, respectively, each slide 3 comprising an upper slide 31 and a lower slide 32. The upper slider 31 or the lower slider 32 includes a bracket 301 and a small wheel 302, and is mounted on the support frame 41 through the bracket 301. The small wheel 302 of the upper slide 31 leans against the rear surface of the support rod 11, the small wheel 302 of the lower slide 32 leans against the front surface of the support rod 11, and both the upper slide 31 and the lower slide 32 can slide up and down along the length direction of the support rod 11 by using the support rod 11 as a sliding track. The upper slide piece 31 surrounds the support rod 11 through the bracket 301, the small wheel 302 and the table body 4, the lower slide piece 32 surrounds the support rod 11 through the periphery of the bracket 301 and the small wheel 302, the small movable range of the sliding device 3 relative to the horizontal direction of the support rod 11 is limited, and the upper slide piece 31 and the lower slide piece 32 are prevented from derailing from the support rod 11. The two side support rods 11 are respectively provided with a pulley device 5 to provide upward pulling force for the table body 4. Each pulley device 5 is a pulley block mechanism, and comprises a fixed pulley 51, a movable pulley 52 and a flexible cable 53. The fixed pulley 51 is arranged at the upper end of the supporting leg 1, and the movable pulley 52 is arranged below the table top 42. The fixed ends of the two wires 53 are connected with the table top 42, the free ends are connected and wound on the winding member 63, and each wire 53 passes through the fixed pulley 51 and the movable pulley 52 in turn. The driving device 6 is arranged on the table body 4 and comprises a power device 61, a transmission device 62 and a winding piece 63 which are connected in sequence in a transmission way. The power unit 61 uses an electric motor 611, the transmission unit 62 is a reduction transmission unit using a worm gear, and when the electric motor 611 rotates, the transmission unit 62 is driven, and the winding member 63 rotates, so that the two wires 53 wound around the winding member 63 are tightened or released together.

As shown in fig. 2, the wire 53 is under tension by the gravity of the table body 4. When the lifting operation is performed, the winding member 63 tightens or releases the wires 53 at both sides together, so that the length of the wires between the fixed ends of the wires 53 and the winding member is lengthened or shortened, thereby lifting the table body 4 together. When the winding member 63 rotates, the flexible cables 53 on both sides are synchronously tightened or released together, so that the table body 4 is horizontally lifted and lowered.

Embodiment 2 of the present invention will be described with reference to fig. 3.

Embodiment 2 is the same as embodiment 1 except for the structure of the pulley device 5. As shown in fig. 3, each support leg 1 is provided with a pulley device 5, and each pulley device 5 comprises a flexible cable 53 and a movable pulley 52. Two movable pulleys 52 are installed at both sides of the table body 4. The fixed end of each wire 53 is connected to the upper end of the both side support legs 1, respectively, and the free end is connected to and wound around the winding member 63. Each wire 53 is passed around the movable pulleys 52 on both sides in the middle.

Embodiment 3 of the present invention will be described with reference to fig. 4.

Embodiment 3 is the same as embodiment 1 except for the structure of the pulley device 5. As shown in FIG. 4, each of the support legs 1 is provided with a pulley device 5, and each pulley device 5 comprises a flexible cable 53, a fixed pulley 51 and two movable pulleys 52. The fixed pulley 51 is arranged at the upper end of the supporting leg, and two movable pulleys 52 are respectively arranged at two sides of the table body 4. Each of the wires 53 is connected at a fixed end to the upper ends of the support legs 1 at both sides, and at a free end to be connected and wound around the winding member 63 while passing around a movable pulley 52, a fixed pulley 51, and a movable pulley 52 in order.

Next, embodiment 4 of the present invention will be described with reference to fig. 5.

Embodiment 4 is the same as embodiment 1 except for the structure of the pulley device 5. As shown in FIG. 5, each of the support legs 1 is provided with a pulley device 5, and each pulley device 5 includes a flexible cable 53 and a fixed pulley 51. The fixed pulley 51 is installed at the upper end of the support leg. Each of the wires 53 is connected at a fixed end thereof to both sides of the table body 4, and at a free end thereof to be connected to and wound around the winding member 63 while passing around the fixed pulley 51.

Next, embodiment 5 of the present invention will be described with reference to fig. 6.

Embodiment 5 is the same as embodiment 1 except for the structure of the pulley device 5. As shown in FIG. 6, each of the support legs 1 is provided with a pulley device 5, and each of the pulley devices 5 includes a flexible cable 53, a fixed pulley 51, and a movable pulley 52. The upper ends of the supporting legs are respectively provided with a fixed pulley 51, and the two sides of the table body 4 are respectively provided with a movable pulley 52. The fixed end of each wire 53 is connected to the upper end of the support leg 1, and the free end is connected to and wound around the winding member 63. Each wire 53 passes through a movable pulley 52 and a fixed pulley 51 in turn.

Next, embodiment 6 of the present invention will be described with reference to fig. 7.

The present embodiment 6 differs from embodiment 1 in two points: first, the driving device 6 is mounted on the beam 2 connecting the upper ends of the two support legs 1, and second, the structure of the pulley device 5 is the same as that of embodiment 1. As shown in fig. 7, the winding member 63 is adjacent to the cross member 2, and the two support legs 1 are respectively provided with a pulley device 5, each pulley device 5 including a flexible cable 53 and a fixed pulley 51. The fixed pulleys 51 are respectively installed at the upper ends of the two support legs 1. The fixed ends of the two flexible cables 53 are respectively connected to the two sides of the table body 4, the free ends are connected and wound on the winding piece 63, and the middle of the two flexible cables are respectively wound around the fixed pulleys 51 on the two sides.

Next, embodiment 7 of the present invention will be described with reference to fig. 8.

The 7 th embodiment differs from the 1 st embodiment in two ways: first, the driving device 6 is mounted on the beam 2 connecting the upper ends of the two support legs 1, and second, the structure of the pulley device 5 is the same as that of embodiment 1. As shown in FIG. 8, the winding member 63 is provided near the cross member 2, and the two support legs 1 are respectively provided with a pulley device 5, each pulley device 5 comprising a flexible cable 53, a fixed pulley 51, and a movable pulley 52. The fixed pulleys 51 are respectively arranged at the upper ends of the two supporting legs 1, and the two sides of the table body are respectively provided with a movable pulley 52. The fixed ends of the two flexible cables 53 are respectively connected to the upper ends of the two supporting legs 1, the free ends are connected and wound on the winding piece 63, and the middle of the two flexible cables is sequentially wound around the fixed pulley 51 and the movable pulley 52.

Next, an 8 th embodiment of the present invention will be described with reference to fig. 9 and 10.

The 8 th embodiment differs from the 1 st embodiment in two ways: first, a driving device 6, second, and a pulley device 5, and the other parts are the same as those of embodiment 1. As shown in fig. 10, the driving device 6 is installed below the tabletop 42 and comprises a power device 61 (a rocking handle 612), a transmission device 62 and a winding member 63 which are connected in sequence in a transmission way; the winding member 63 is in the shape of a long rod, and is installed below the tabletop 42 through the shaft bracket 7, and two ends of the winding member are respectively close to the two supporting legs 1; the two side wires 53 are connected to and wound around both ends of the winding member 63, respectively. As shown in FIG. 10, the two support legs 1 are respectively provided with a pulley device 5, and each pulley device 5 comprises a flexible cable 53 and a fixed pulley 51. The fixed pulley 51 is installed at the upper end of the support leg 1. The fixed ends of the two flexible cables 53 are respectively connected to two sides of the table body 4, the free ends are respectively connected and wound at two ends of the winding member 63, and the middle of the two flexible cables is respectively wound around a fixed pulley 51.

Next, a 9 th embodiment of the present invention will be described with reference to fig. 11.

The present embodiment 9 and 8 are similar to embodiment 8 except for the configuration of the pulley device 5. As shown in fig. 11, the two support legs 1 are respectively provided with a pulley device 5, and each pulley device 5 only contains one flexible cable 53. The two wires 53 have fixed ends respectively connected to the upper ends of the both side support legs 1 and free ends respectively connected to and wound around both ends of the winding member 63.

Next, a 10 th embodiment of the present invention will be described with reference to fig. 12.

The present embodiment 10 is similar to embodiment 1 except that two driving devices 6 are used. As shown in fig. 12, two wires 53 are connected to and wound around the winding members 63 of the two driving devices 6, respectively. In order to synchronously lift and lower the two sides of the table body 4, the controller is required to control the two motors 611 to simultaneously rotate and synchronously tighten or release the two wires wound around the winding member 63. Since the lifting tension is distributed over the two drives 6, a drive 6 with a lower drive torque can be used.

In the embodiment of the lifting table, the supporting rod 11 does not need to be lifted, and the flexible cable 53 and the pulley are common components, so the structure is simple and the manufacturing cost is low. The pulley devices 5 on the two sides provide synchronous lifting tension for the two sides of the table body 4, so that the table top 4 is not easy to incline.

The above is only a preferred embodiment of the present invention, and the present invention is not limited to the above embodiment. To a person skilled in the art, the invention can vary the embodiment of some parts of the lifting table, for example the number of support legs 1: the method comprises the following steps of firstly, using two supporting legs 1, secondly, using three supporting legs 1, using three pulley devices 5 and using three sliding devices 3; the number of the fixed pulleys 51 and the movable pulleys 52 in the pulley device 5 is changed to form pulley blocks of different types; change the parts of the upper slide 31 or lower slide 32 connected to the carriage 302: firstly, using a small wheel, and secondly, using a sliding block; changing the number of drive devices: firstly, two driving devices 6 are used, two flexible cables 53 are respectively wound on the winding parts 63 of the two driving devices 6, and secondly, one driving device 6 is used, and different flexible cables 53 are wound on the winding parts 63 of the same driving device 6; changing the mounting position of the driving device 6: the first one is arranged on the beam 2, and the second one is arranged on the table body 4; changing the power unit 61: first, the motor 611 is used, and second, the handle 612 is used. Different embodiments of the lifting table can be formed by recombining the above changes. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A lifting table is characterized in that: the lower part of each supporting leg is a base supported on the ground, and the upper part of each supporting leg is a rod-shaped supporting rod; the supporting legs are connected through a cross beam; the table body comprises a support frame and a table top, and the table top is arranged above the support frame; each supporting leg is correspondingly provided with a sliding device arranged on the table body; each sliding device at least comprises an upper sliding piece and a lower sliding piece, wherein the upper sliding piece is positioned above the lower sliding piece, takes the supporting rod as a sliding track and clings to the supporting rod to slide up and down; the driving device comprises a power device, a transmission device and at least one winding piece which are sequentially connected in a transmission manner, the power device is a motor or a rocking handle, and the driving device is arranged on the cross beam or the table body; each supporting leg is correspondingly provided with a pulley device, each pulley device comprises a flexible cable, 0 or at least one movable pulley and 0 or at least one fixed pulley, and upward tension is provided for the table body; the movable pulley is arranged on the table body, and the fixed pulley is arranged at the upper end of the supporting leg; one end of the flexible cable is connected with the upper end of the supporting leg or the table body or the cross beam, the other end of the flexible cable is connected and wound on the winding piece, and the middle of the flexible cable sequentially passes around each pulley of the pulley device.

2. The elevating table as set forth in claim 1, wherein: the upper sliding piece or the lower sliding piece comprises a bracket and a small wheel or a sliding block connected with the bracket, the small wheel or the sliding block of the upper sliding piece leans against the rear surface of the supporting rod, the small wheel or the sliding block of the lower sliding piece leans against the front surface of the supporting rod, and the upper sliding piece and the lower sliding piece take the supporting rod as a sliding track and cling to the supporting rod to slide up and down; the small wheel or the sliding block, the bracket or the table body surround the supporting rod together, so that the small movable range of the upper sliding piece and the lower sliding piece relative to the supporting rod in the horizontal direction is limited, and the upper sliding piece and the lower sliding piece are prevented from derailing from the supporting rod.

3. The elevating table as set forth in claim 1, wherein: each pulley device comprises different numbers of fixed pulleys or different numbers of movable pulleys, and different winding modes can be adopted; when the pulley device comprises at least one fixed pulley or at least one movable pulley, the pulley device forms a pulley mechanism: a movable pulley, a movable pulley or a pulley block; the pulley device is supported by the upper end of the supporting leg or the cross beam to provide upward tension for the table body, so that the table body is at a certain height.

4. The elevating table as set forth in claim 1, wherein: when only one driving device is arranged, one ends of the flexible cables of different pulley devices are connected and wound on the same winding piece or are respectively wound on different coaxial winding pieces; when at least two driving devices are arranged, one ends of the flexible cables of different pulley devices are respectively connected with and wound on winding pieces of different driving devices; the winding part rotates to enable each flexible cable to be tightened or released simultaneously, the tensile force of the flexible cables of the pulley device acts on two sides of the table body, and the two sides of the table body move up and down synchronously.

5. The elevating table as set forth in claim 1, wherein: when the driving device is an electric motor, the transmission device is a speed reduction transmission device using a worm gear and a worm, the controller is connected with the ascending key, the descending key, the electric motor and the upper position sensor and the lower position sensor, and the controller detects signals of the position sensors, the ascending key or the descending key and controls the electric motor to rotate forwards, reversely or stop rotating.

6. The elevating table as set forth in claim 1, wherein: when the driving device is a rocking handle, the transmission device has a reverse self-locking function, and when the rocking handle is not rocked, the transmission device is in a locking state, and the winding part stops rotating; when the rocking handle is shaken to rotate, the transmission device and the winding piece are driven to rotate.