CN103637550A

CN103637550A - Teacher desk capable of going up and down steps

Info

Publication number: CN103637550A
Application number: CN201310723634.5A
Authority: CN
Inventors: 李超; 胡兰雄; 王超超; 王俊芳; 陈千; 张庆英
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-12-25
Filing date: 2013-12-25
Publication date: 2014-03-19

Abstract

The invention discloses a teacher desk capable of going up and down steps. The movable teacher desk can go up and down the steps, and a movement range is further extended. The teacher desk capable of going up and down the steps comprises a teacher desk main body housing and a chassis and is characterized in that a lifting member is arranged above the chassis of the teacher desk and mainly comprises racks, gears, worm wheels, worms and the like; and a counterweight balance adjustment member is arranged below the chassis and mainly comprises groove cams, counterweight oscillating rods, counterweights and the like. In this way, the teacher desk goes up and down the steps through the lifting member and ensures stable movement through the counterweight balance adjustment member, the movement range of the movable teacher desk is further extended, and the utilization rate of the teacher desk is increased.

Description

A kind of lectern that can up/down steps

Technical field

The present invention relates to the design field of lectern, particularly for the now design of rare lectern that can up/down steps.

Background technology

Lectern is the very important aid of teachers' instruction, and for strengthening the utilization rate of movable lectern, the movable lectern of existing part can move by the castor of its bottom on level land, but owing to being subject to the restriction of step in classroom, scope of activities is limited.For further increasing the scope of activities of lectern, add the utilization rate of large equipment, need a kind of lectern that can up/down steps.

Summary of the invention

The object of this invention is to provide a kind of simple in structure, reliable lectern that can up/down steps.

Object of the present invention can realize in the following manner: a kind of lectern that can up/down steps, comprises lectern main body cover, lift component, counterweigh adjustment means.Lectern carrys out up/down steps by the lifting of tooth bar, and the motion by counterweigh adjustment means regulates lectern center of gravity in real time, realize lectern motion steadily.The design of this lectern can make the lectern can up/down steps, and in this process, keep lectern steadily.

Compared with prior art, advantage of the present invention is as follows: increased the device that can make lectern up/down steps, made lectern break away from the restriction of step, can in classroom, move on a large scale; And designed counterweigh adjustment means, made lectern up/down steps process steady and smooth.

Accompanying drawing explanation

Accompanying drawing 1 is overall schematic of the present invention.

Accompanying drawing 2 is lift component schematic diagram.

Accompanying drawing 3 is counterweigh adjustment means schematic diagram (from chassis beneath).

Accompanying drawing 4 is counterweigh adjustment means schematic diagram (from top, chassis, observing).

Wherein: 1-bearings plate, 2-table body framework, 3-worm screw, 4-worm gear, 5-tooth bar, 6-spur gear, 7-motor, 8-slide rail, 9-slide block, 10-bearing support block 2, 11-infrared ray sensor, , 12-High Damping Spring, 13-balancing weight, 14-counterweight fork, 15-pin 1, 16-fork, 17-rotating shaft 1, 18-rotating shaft 2, 19-connecting rod, 20-groove cam, 21-pin 2, 22-straight line slide bar, 23-bevel gear 2, 24-bevel gear 1, 25-chute 1, 26-power transmission shaft, 27-groove, 28-chute 2.

The specific embodiment

As shown in Figure 1, Figure 2, shown in Fig. 3 and Fig. 4, lectern that can up/down steps comprises lectern main body cover, lift component, counterweigh adjustment means.Figure 2 shows that gear lift component schematic diagram, integrated member is positioned at top, chassis; Counterweigh adjustment means is positioned at below, chassis, as shown in Figure 3, Figure 4.

Referring to Fig. 2, the power of lift component is provided by motor, by elevating control motor, drive worm and gear, two spur gears coaxial with worm gear are rotated, the tooth bar back side is connected with slide rail, and slide rail can move up and down along the slide block being fixed on chassis, thereby realizes the lifting of wheel.The process of topping bar, after the infrared sensor of below, chassis senses ground level and changes, first and second and three skates hoist successively, and when three skates all go up after step, the lifting of lectern integral body returns to original height; The process of getting out of a predicament or an embarrassing situation, when lectern arrives step edge soon, the ultrasonic sensor of below, chassis detects the variation of ground level, and lectern height is whole decline first, and then first and second and three skates decline successively.

Referring to Fig. 3, Fig. 4, the power of counterweigh adjustment means comes from second elevating control motor, by worm gear, driven the rotation of bevel gear 1 coaxial with it, thereby drive with the coaxial affixed groove cam of bevel gear 2, rotate, the groove design of this cam face is specific curves, can guarantee that wheel is in certain range, counterweight fork can turn to same position.Before topping bar, balancing weight is positioned at the 3rd skate top, when the first skate rises, because center of gravity is positioned at lectern rear portion, can keep in lectern up/down steps process steadily; When the second skate rises, counterweight fork swings to the first skate top, and center of gravity is transferred to lectern front portion so that the 3rd skate lectern can held stationary while rising.Counterweight fork is shorter from turning to dwell time, and when its cut, balancing

weight

1,2 can move back and forth in chute, plays cushioning effect, the impact causing to reduce counterweight fork velocity jump.

Claims

1. a lectern that can up/down steps, comprises lectern main body cover and chassis, it is characterized in that: the top, chassis of described lectern is provided with lift component, and below is provided with counterweigh adjustment means, wherein:

1) lift component: bearing support block 1(1), table body framework (2), worm screw (3), worm gear (4), tooth bar (5), spur gear (6), motor (7), slide rail (8), slide block (9), bearing support block 2(10), infrared ray sensor (11), power transmission shaft (26);

2) counterweigh member: High Damping Spring (12), balancing weight (13), counterweight fork (14), pin 1(15), fork (16), rotating shaft 1(17), rotating shaft 2(18), connecting rod (19), groove cam (20), pin 2(21), straight line slide bar (22), bevel gear 1(24), bevel gear 2(23), chute (25).

2. lift component according to claim 1, it is characterized in that: spur gear (6) is arranged on (26) on power transmission shaft with worm gear (4), by motor (7), drive worm screw (3), thereby drive the rotation of worm gear (4), the tooth bar back side connects straight-line guide rail slide block, slide block (9) is fixed on chassis, and guide rail (8) can slide up and down along it.

3. power transmission shaft according to claim 2, is characterized in that: power transmission shaft (26) two ends are arranged on bearing spider 1(1) upper, worm screw one end is arranged on bearing spider 2(11) upper, the other end supports by motor (7).

4. lift component according to claim 1, is characterized in that: lectern chassis front and rear is provided with infrared ray sensor, and installs with ground inclination certain angle.

5. counterweigh adjustment means according to claim 1, it is characterized in that: the power input of described counterweigh adjustment means comes from second elevating control motor, bevel gear 1(24) be connected on power transmission shaft (26), groove cam (20) and bevel gear 2(23) be coaxially connected, the pin 1(21 of straight line slide bar (22) one end) be positioned at the groove (27) of groove cam (20), the other end and connecting rod (19) are hinged, connecting rod is hinged with fork (16) again, counterweight fork (14) and fork difference be 1(17 around the shaft) and rotating shaft 2(18) rotate, the pin 2(15 of fork (16) one end) be positioned at the chute 1(28 of counterweight fork).

6. counterweight fork according to claim 5, is characterized in that: in counterweight fork (14), have a chute 2(25), in chute, there are two balancing weights (13), by High Damping Spring (12), balancing weight (13) is connected with chute two side.