CN213605008U - Hand-operated pressure regulating lifting column - Google Patents

Abstract

The utility model discloses a hand formula pressure regulating lift post, including lift post body and pressure regulating mechanism, be equipped with high-pressure air cavity in the lift post body, pressure regulating mechanism includes stay tube, communicating pipe, piston tube, piston rod, lead screw, nut and crank, the piston tube sets up in the stay tube, is equipped with the compression chamber in the piston tube, and the one end of piston rod sets up in the compression chamber, and the nut is fixed with the other end of piston rod, lead screw and nut threaded connection, lead screw and crank connection; the communicating pipe is communicated with the high-pressure air cavity and the compression cavity. The utility model provides a dolly formula circuit breaker energy storage spring assembly and disassembly tools has assembly and disassembly tools simple structure, low in manufacturing cost, and the dismouting method is simple, and the dismouting is efficient, can not cause advantages such as energy storage spring outward appearance damage.

Description

Hand-operated pressure regulating lifting column

Technical Field

The utility model belongs to the technical field of the lift post and specifically relates to a hand formula pressure regulating lift post is related to.

Background

The pneumatic lifting table needs to use a lifting column to realize the lifting and locking functions of the lifting table. The core of the lifting column is a seat lifting cylinder (refer to the content of a pneumatic lifting table in CN 201920784896.5), wherein the resilience of the lifting cylinder when opening the valve is the pressure generated by the air pressure difference generated by the difference of the surface areas above and below the piston. The lifting column using the lifting cylinder is simple in structure and low in production cost. However, this type of cylinder has the following problems: the air pressure in the air cylinder is unchanged, when the heavy material amount above the lifting column body is large, the lifting force generated by the air in the high-pressure air cavity is insufficient, the gravity of the heavy material cannot be balanced, and the lifting column body can be lifted up only by manpower even if the air valve of the lifting column body is opened, so that the lifting column body is very strenuous; when the heavy matter amount above the lifting column body is small, the lifting force generated by the gas in the high-pressure gas cavity is too high, and the lifting column body is difficult to press down even if the gas valve of the lifting column body is opened. Therefore, a hand-operated pressure-regulating lifting column needs to be designed, the pressure of a high-pressure air cavity in the lifting column body can be regulated according to the load of a desktop, so that the proper lifting force is achieved, the effect of balancing the lifting force is achieved, and the lifting table can be lifted only by little external force in a balanced state.

Chinese patent application publication No. CN205162308U, published as 2016, 04/20/h, entitled "an air pressure lifting table", discloses an air pressure lifting table, which comprises a stand column, one end of a first air pressure rod is hinged on the stand column, the top end of the stand column is hinged with one end of a movable supporting arm, the other end of the movable supporting arm is hinged with the other end of the first air pressure rod and a table top fixing frame, and the table top fixing frame is provided with a table top. The utility model discloses its rational in infrastructure ingenious, convenient to use can easily, swiftly adjust the desk height through the use of atmospheric pressure stick to can also adjust the gradient of desktop. The above problems still remain.

Disclosure of Invention

The utility model aims to overcome the defects that the air pressure in the air cylinder is not changed in the prior art, and when the heavy material above the lifting column body is large, the lifting force generated by the air in the high-pressure air cavity is insufficient; when the heavy matter volume of lift post body top is less, the too high problem of lift of gaseous production in the high-pressure air cavity provides a hand formula pressure regulating lift post, can adjust the pressure of this internal high-pressure air cavity of lift post according to the load of desktop to reach suitable elevating power and reach the balanced effect of the decline power that rises, make the effect that the lift table just need little external force just can realize going up and down under balanced state.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a hand-operated pressure regulating lifting column comprises a lifting column body and a pressure regulating mechanism, wherein a high-pressure air cavity is arranged in the lifting column body, the pressure regulating mechanism comprises a supporting tube, a communicating tube, a piston rod, a lead screw, a nut and a hand crank, the piston tube is arranged in the supporting tube, a compression cavity is arranged in the piston tube, one end of the piston rod is arranged in the compression cavity, the nut is fixed with the other end of the piston rod, the lead screw is in threaded connection with the nut, and the lead screw is connected with the hand crank; the communicating pipe is communicated with the high-pressure air cavity and the compression cavity.

Among the above-mentioned technical scheme, will pressurize or step down the high pressure air cavity through pressure regulating mechanism to realize the improvement or the decline of lift post body, when the heavy material volume of lift post body top is great, the lift that the interior gas of high pressure air cavity produced is not enough, and at this moment, can pressurize the high pressure air cavity through pressure regulating mechanism. When the heavy matter amount above the lifting column body is small, the lifting force generated by the gas in the high-pressure air cavity is too high, and at the moment, the high-pressure air cavity can be depressurized through the pressure regulating mechanism. The pressure regulating mechanism has the working principle of pressurization and depressurization as follows: the screw rod is driven to rotate through the crank handle, and then the nut and the piston rod are driven to move up and down, so that the volume of the compression cavity is changed, and air pressure is increased or reduced.

Preferably, the pressure regulating mechanism further comprises a speed reducer, the speed reducer is fixed to the supporting tube, an input shaft of the speed reducer is connected with the crank handle, and an output shaft of the speed reducer is connected with the screw rod. The speed reducer can save more labor when the hand crank is used.

Preferably, the input shaft of the speed reducer is arranged horizontally, and the output shaft of the speed reducer is arranged vertically. The structure facilitates the operation of the hand crank.

Preferably, the communicating pipe is provided with a barometer. The barometer is communicated with the communicating pipe, so that the internal air pressure of the high-pressure air cavity can be conveniently checked.

Preferably, one end of the piston rod, which is arranged in the compression cavity, is provided with a piston body, and the piston body is tightly attached to the inner side wall of the piston tube.

Preferably, the side wall of the piston body is provided with a sealing ring groove, and an elastic sealing ring is arranged in the sealing ring groove. The structure can increase the sealing performance of the piston body.

Preferably, the number of the sealing ring grooves is two, and the two sealing ring grooves are arranged side by side. The structure can increase the sealing performance of the piston body.

The utility model has the advantages that: (1) the pressure of the high-pressure air cavity in the lifting column body can be adjusted according to the load of the table top, so that the proper lifting force can be achieved to achieve the effect of balancing the ascending and descending force, and the lifting table can be lifted only by little external force in a balanced state; (2) the pressure regulating mechanism has simple and reliable structure and convenient operation.

Drawings

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

fig. 2 is a partial enlarged view at a as in fig. 1.

In the figure: the lifting column comprises a lifting column body 1, a high-pressure air cavity 1.1, a pressure regulating mechanism 2, a supporting tube 2.1, a communicating tube 2.2, a piston tube 2.3, a compression cavity 2.3.1, a piston rod 2.4, a screw rod 2.5, a nut 2.6, a crank 2.7, a speed reducer 2.8, a piston body 2.9, a sealing ring groove 2.9.1, an elastic sealing ring 2.10 and a barometer 3.

Detailed Description

The invention is further described with reference to the accompanying drawings and specific embodiments.

Example 1:

as shown in fig. 1 and 2, a hand-operated pressure regulating lifting column comprises a lifting column body 1 and a pressure regulating mechanism 2, wherein a high-pressure air cavity 1.1 is arranged in the lifting column body 1, the pressure regulating mechanism 2 comprises a supporting tube 2.1, a communicating tube 2.2, a piston tube 2.3, a piston rod 2.4, a screw rod 2.5, a nut 2.6, a hand crank 2.7 and a speed reducer 2.8, the piston tube 2.3 is arranged in the supporting tube 2.1, a compression cavity 2.3.1 is arranged in the piston tube 2.3, one end of the piston rod 2.4 is arranged in the compression cavity 2.3.1, one end of the piston rod 2.4 arranged in the compression cavity 2.3.1 is provided with a piston body 2.9, and the piston body 2.9 is tightly attached to the inner side wall of the piston tube 2.3; two sealing ring grooves 2.9.1 are arranged on the side wall of the piston body 2.9, the two sealing ring grooves 2.9.1 are arranged side by side, and elastic sealing rings 2.10 are arranged in the sealing ring grooves 2.9.1. The nut 2.6 is fixed with the other end of the piston rod 2.4, the screw rod 2.5 is in threaded fit connection with the nut 2.6, the speed reducer 2.8 is fixed with the support tube 2.1, the input shaft of the speed reducer 2.8 is connected with the crank 2.7, and the output shaft of the speed reducer 2.8 is connected with the screw rod 2.5; the input shaft of the speed reducer 2.8 is transversely arranged, and the output shaft of the speed reducer 2.8 is vertically arranged; the communicating pipe 2.2 is communicated with the high-pressure air cavity 1.1 and the compression cavity 2.3.1, and the communicating pipe 2.2 is provided with a barometer 3.

Among the above-mentioned technical scheme, will pressurize or step down high-pressure air cavity 1.1 through pressure regulating mechanism 2, thereby realize the improvement or the decline of lift post body 1, when the heavy material volume of lift post body 1 top is great, the lift that the interior gas of high-pressure air cavity 1.1 produced is not enough, the gravity of unable balanced heavy object, even open the pneumatic valve of lift post body 1, also need the manpower to lift hard, just can make lift post body 1 rise, at this moment, can pressurize high-pressure air cavity 1.1 through pressure regulating mechanism 2. When the heavy matter amount above the lifting column body 1 is small, the lift force generated by the gas in the high-pressure gas cavity 1.1 is too high, and even if the gas valve of the lifting column body 1 is opened, the lifting column body 1 is difficult to press down, and at the moment, the high-pressure gas cavity 1.1 can be depressurized through the pressure regulating mechanism 2. The pressure regulating mechanism 2 has the working principle of pressure increasing and pressure reducing: the screw rod 2.5 is driven to rotate through the hand crank 2.7, and then the nut 2.6 and the piston rod 2.4 are driven to move up and down, so that the volume of the compression cavity 2.3.1 is changed, and the air pressure is increased or reduced.

The utility model has the advantages that: the pressure of the high-pressure air cavity in the lifting column body can be adjusted according to the load of the table top, so that the proper lifting force can be achieved to achieve the effect of balancing the ascending and descending force, and the lifting table can be lifted only by little external force in a balanced state; the pressure regulating mechanism has simple and reliable structure and convenient operation.

Claims (7)

1. A hand-operated pressure regulating lifting column is characterized by comprising a lifting column body and a pressure regulating mechanism, wherein a high-pressure air cavity is arranged in the lifting column body, the pressure regulating mechanism comprises a supporting tube, a communicating tube, a piston rod, a lead screw, a nut and a hand crank, the piston tube is arranged in the supporting tube, a compression cavity is arranged in the piston tube, one end of the piston rod is arranged in the compression cavity, the nut is fixed with the other end of the piston rod, the lead screw is in threaded connection with the nut, and the lead screw is connected with the hand crank; the communicating pipe is communicated with the high-pressure air cavity and the compression cavity.

2. The hand-operated pressure regulating lifting column according to claim 1, wherein the pressure regulating mechanism further comprises a speed reducer, the speed reducer is fixed with the support tube, an input shaft of the speed reducer is connected with the hand crank, and an output shaft of the speed reducer is connected with the screw rod.

3. The hand-operated pressure-regulating lifting column as claimed in claim 2, wherein the input shaft of the speed reducer is arranged horizontally, and the output shaft of the speed reducer is arranged vertically.

4. The hand-operated pressure-regulating lifting column according to claim 1, 2 or 3, wherein a barometer is arranged on the communicating pipe.

5. The hand-operated pressure regulating lifting column according to claim 1, 2 or 3, wherein a piston body is arranged at one end of the piston rod arranged in the compression cavity, and the piston body is tightly attached to the inner side wall of the piston tube.

6. The hand-operated pressure-regulating lifting column as claimed in claim 5, wherein a sealing ring groove is formed in the side wall of the piston body, and an elastic sealing ring is arranged in the sealing ring groove.

7. The hand-operated pressure-regulating lifting column as claimed in claim 6, wherein the number of the sealing ring grooves is two, and the two sealing ring grooves are arranged side by side.

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