Elevator and gravity balancing device

Abstract

A lifter comprises a base, a guide rail, a lifting mounting plate and a gravity balancing device. The guide rail extends upwards on the base; the lifting mounting plate is connected with the guide rail and slides up and down along the guide rail; the gravity balancing device comprises an air cylinder, an air inlet control valve and a pressure relief valve; the output end of the air cylinder is connected with the lifting mounting plate and provides bearing force for the lifting mounting plate, and the input end of the air cylinder is connected with the air inlet control valve and the pressure relief valve. In the working process, gas enters the air cylinder through the gas inlet control valve, and redundant gas in the air cylinder flows out of the pressure relief valve. In addition, the utility model further provides a gravity balancing device. Compared with the prior art, the elevator and the gravity balancing device can reduce the condition that a load slides down quickly.

Description

Technical Field

[0001] The utility model relates to the technical field of lifting mechanical equipment, in particular to an elevator and a gravity balancing device. Background Art

[0002] In modern mechanical processing and assembly equipment, linear up and down reciprocating motion is a common mode of motion. During operation, the lifting motor drives the lifting platform installed on the guide rail to perform lifting motion through transmission methods such as synchronous belts and gears. At the same time, other equipment is installed on the lifting platform, such as suction nozzles, drills, mechanical grippers and related drive equipment, so the lifting platform needs to bear a certain weight.

[0003] However, during the machining process, the lifting motor may be in a power-off state due to power outages or equipment failures. At this time, a large part of the weight of the lifting platform and the equipment installed on it will be directly loaded onto the output shaft of the motor. Due to gravity, the motor may reverse, the gears may be damaged, or even the output shaft of the motor may break. The lifting platform may fall quickly, causing various failures and damages. Utility Model Content

[0004] Based on this, the purpose of the utility model is to overcome the defects or shortcomings of the prior art and provide a lift.

[0005] The utility model is realized by the following technical solutions:

[0006] A lift comprises a base, a guide rail, a lifting mounting plate and a gravity balancing device; the guide rail extends upward above the base; the lifting mounting plate is connected to the guide rail and slides up and down along it; the gravity balancing device comprises a cylinder, an air intake control valve and a pressure release valve; the output end of the cylinder is connected to the lifting mounting plate and provides supporting force thereto, and the input end of the cylinder is respectively connected to the air intake control valve and the pressure release valve; during operation, gas enters the cylinder through the air intake control valve, and excess gas in the cylinder flows out from the pressure release valve.

[0007] Compared with the prior art, the lift of the utility model provides supporting force for the lifting mounting plate through a gravity balancing device to prevent the lifting mounting plate from sliding down quickly in the event of a sudden power outage. In addition, the air intake control valve and the pressure release valve can be adjusted according to the load size to avoid insufficient supporting force or obstruction to the downward movement of the lifting mounting plate.

[0008] Furthermore, the air intake control valve is a one-way valve to reduce the use of electricity.

[0009] Furthermore, it also includes a controller; the gravity balancing device also includes a pressure control switch electrically connected to the controller and the intake control valve respectively; the intake control valve is a normally closed solenoid valve; the controller controls the opening and closing of the intake control valve through the pressure control switch according to the internal pressure of the cylinder, and can accurately control the opening and closing of the intake control valve to ensure sufficient supporting force.

[0010] Furthermore, the gravity balancing device also includes a pressure reducing valve, which is connected between the outlet of the air intake control valve and the input end of the cylinder to reduce the impact of the gas on the cylinder.

[0011] In addition, the utility model also provides a gravity balancing device, and its technical solution is as follows:

[0012] A gravity balancing device comprises a cylinder, an air intake control valve and a pressure release valve; the input end of the cylinder is respectively connected to the air intake control valve and the pressure release valve; when working, gas enters the cylinder through the air intake control valve, and excess gas in the cylinder flows out from the pressure release valve.

[0013] Compared with the prior art, the gravity balancing device of the utility model can provide supporting force for the load of the elevator, avoiding the rapid decline of the load on the elevator in the event of a sudden power outage; and the air intake control valve and the pressure release valve can be adjusted according to the load size to avoid insufficient supporting force or obstruction to the descending movement of the load.

[0014] Furthermore, it also includes a three-way valve and a pressure reducing valve; the interfaces of the three-way valve are respectively connected to the input end of the cylinder, the outlet of the pressure reducing valve and the inlet of the pressure release valve; the outlet of the intake control valve is connected to the inlet of the pressure reducing valve to reduce the impact of the gas on the cylinder.

[0015] Furthermore, the air intake control valve is a one-way valve to reduce the use of electricity.

[0016] Furthermore, it also includes a pressure control switch electrically connected to the intake control valve; the intake control valve is a normally closed solenoid valve, and the pressure control switch controls the on-off of the intake control valve to accurately control the on-off of the intake control valve to ensure sufficient supporting force.

[0017] Furthermore, it also includes a muffler, which is arranged at the output end of the cylinder and / or the outlet of the pressure release valve to reduce the noise generated when the gas flows out.

[0018] Furthermore, the output end of the cylinder is located above the input end of the cylinder, and the movement direction of the cylinder is consistent with the movement direction of the piston.

[0019] In order to better understand and implement the present invention, the present invention is described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the lift in the utility model;

[0021] Figure 2 This is a front view of the lift in the utility model;

[0022] Figure 3 It is a side view of the lift in the utility model;

[0023] Figure 4 It is a simplified structural diagram of the gravity balancing device in the utility model. DETAILED DESCRIPTION

[0024] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0025] The gravity balancing device and the elevator of the utility model are mainly arranged to deal with the situation that the lifting installation plate may slide down rapidly when the power is suddenly lost. The gravity balancing device generates upward resistance to buffer the descending speed of the lifting installation plate, and can be adjusted according to the load size to achieve a gravity balanced state.

[0026] For details, please refer to Figures 1 to 4The lift of the utility model includes a base 10, a guide rail 20, a lifting mounting plate 30, a gravity balancing device 40 and a controller (not shown). The base 10 is set on a workbench or other equipment, the guide rail 20 extends upward on the base 10, and the lifting mounting plate 30 is engaged with the guide rail 20 and slides up and down along it. The gravity balancing device 40 is connected to the lifting mounting plate 30 and generates an upward supporting force on the lifting mounting plate 30. Other equipment is installed on the lifting mounting plate 30 and rises and falls accordingly. The controller is electrically connected to the gravity balancing device 40 and controls the supporting force of the gravity balancing device 40 according to the lifting and lowering of the lifting mounting plate 30. In this embodiment, there are two guide rails 20, which are respectively located on the left and right sides of the lifting mounting plate 30, and the gravity balancing device 40 is installed on one side of the lifting mounting plate 30 in the left and right directions.

[0027] The gravity balancing device 40 includes a cylinder 41, a three-way valve 42, a pressure reducing valve 43, an air intake control valve 44 and a pressure release valve 45. The cylinder 41 is provided with an input end and an output end, and pushes other devices through a piston. The input end is the inlet for gas to enter the cylinder 41, and the output end is the end at which the piston is connected to other devices. In this embodiment, the input end is located at the bottom of the cylinder 41, and the output end is located at the top of the cylinder 41. The piston of the cylinder 41 protrudes from the top of the cylinder 41 and is connected to the lifting mounting plate 30, slides up and down together with the lifting mounting plate 30, and provides a supporting force for the lifting mounting plate 30. The interfaces of the three-way valve 42 are respectively connected to the input end of the cylinder 41, and the outlet of the pressure reducing valve 43 is the low-pressure end and is connected to the inlet of the pressure release valve 45. The inlet of the pressure reducing valve 43 is a high-pressure end and is connected to the outlet of the air intake control valve 44. The inlet of the air intake control valve 44 is connected to an external gas source, and the outlet of the pressure release valve 45 is connected to the external space. The pressure reducing valve 43 can buffer the impact of the high-pressure gas entering from the air intake control valve 44 on the cylinder 41 and the three-way valve 42, and adjust the pressure difference between the input end of the cylinder 41 and the inlet of the pressure release valve 45. Further, the gravity balance device 40 also includes a muffler 46, which can be installed at the output end of the cylinder 41 and / or the outlet of the pressure release valve 45 to reduce the noise during gas discharge.

[0028] In one embodiment, the air intake control valve 44 is a one-way valve in the prior art. When in use, the output pressure of the outlet of the pressure reducing valve 43 is adjusted according to the load on the lifting mounting plate 30, and the release pressure of the pressure release valve 45 and the stop flow pressure of the air intake control valve 44 are adjusted, so that the release pressure of the pressure release valve 45 is greater than the output pressure of the pressure reducing valve 43, so as to prevent the gas from leaking out of the pressure release valve 45 before the pressure of the cylinder 41 reaches the required size. When the air intake control valve 44 is opened, the gas flows in one direction, and flows through the pressure reducing valve 43 and the three-way valve 42 in sequence, and enters the cylinder 41, and the cylinder 41 generates an upward supporting force until the internal pressure of the cylinder 41 is equal to the stop flow pressure of the air intake control valve 44, and the air intake control valve 44 is automatically closed. At this time, since the internal pressure of the cylinder 41 has not yet reached the release pressure of the pressure release valve 45, the pressure release valve 45 is not opened, and the gravity balance device 40 reaches a gravity balance state. When the lifting installation plate 30 rises, the internal space of the cylinder 41 increases, and its internal pressure decreases to less than the stop pressure of the intake control valve 44. The intake control valve 44 opens again, and the gas continues to flow into the intake control valve 44 in one direction, and flows through the pressure reducing valve 43 and the three-way valve 42 in sequence, and enters the cylinder 41 until the internal pressure of the cylinder 41 is again equal to the stop pressure of the intake control valve 44. When the lifting installation plate 30 descends, the internal space of the cylinder 41 decreases, and its internal pressure increases to greater than the release pressure of the pressure release valve 45. The pressure release valve 45 opens, and the excess gas slowly flows out of the pressure release valve 45 until the internal pressure of the cylinder 41 is less than or equal to the release pressure of the pressure release valve 45, and the pressure release valve 45 closes. Even if there is a sudden power failure during operation, the air intake control valve 44 and the pressure release valve 45 are also in a closed state, and the air pressure inside the cylinder 41 can continue to provide a certain supporting force, thereby preventing the lifting mounting plate 30 from sliding down quickly.

[0029] In another embodiment, the air intake control valve 44 is a normally closed solenoid valve in the prior art, which can be opened after power is turned on. The gravity balance device 40 also includes a pressure control switch 47 electrically connected to the controller and the pressure release valve 45. The controller detects the internal pressure of the cylinder 41 and controls the on-off of the air intake control valve 44 through the pressure control switch 47, thereby realizing the on-off control of the air intake control valve 44 according to the internal pressure of the cylinder 41. When in use, the output pressure of the outlet of the pressure reducing valve 43 is adjusted according to the load on the lifting mounting plate 30, and the release pressure of the pressure relief valve 45 and the stop pressure of the intake control valve 44 are adjusted, so that the release pressure of the pressure relief valve 45 is greater than the output pressure of the pressure reducing valve 43, and the controller supplies power to the intake control valve 44 through the pressure control switch 47, the intake control valve 44 is opened, and the gas flows into the intake control valve 44, and flows through the pressure reducing valve 43 and the three-way valve 42 in sequence, and enters the cylinder 41 until the internal pressure of the cylinder 41 is equal to the stop pressure of the intake control valve 44, and the controller stops supplying power to the intake control valve 44 through the pressure control switch 47, and the intake control valve 44 is in a normally closed state. When the lifting installation plate 30 rises, the internal space of the cylinder 41 increases, and its internal pressure decreases to less than the stop pressure of the intake control valve 44. The intake control valve 44 opens again, and the gas continues to flow into the intake control valve 44 in one direction, and flows through the pressure reducing valve 43 and the three-way valve 42 in sequence, and enters the cylinder 41 until the internal pressure of the cylinder 41 is again equal to the stop pressure of the intake control valve 44. When the lifting installation plate 30 descends, the internal space of the cylinder 41 decreases, and its internal pressure increases to greater than the release pressure of the pressure release valve 45. The pressure release valve 45 opens, and the excess gas slowly flows out of the pressure release valve 45 until the internal pressure of the cylinder 41 is less than or equal to the release pressure of the pressure release valve 45, and the pressure release valve 45 closes. Even if there is a sudden power failure during operation, the air intake control valve 44 and the pressure release valve 45 are also in a closed state, and the air pressure inside the cylinder 41 can continue to provide a certain supporting force, thereby preventing the lifting mounting plate 30 from sliding down quickly.

[0030] Compared with the prior art, the utility model lift and gravity balancing device have the following advantages:

[0031] 1. Avoid rapid load decline in the event of a sudden power outage, reduce damage, reduce equipment failures, and increase stability;

[0032] 2. It can be adjusted according to the load size to adjust the supporting force to ensure that the supporting force is sufficient and will not hinder the downward movement of the lifting installation plate;

[0033] 3. It can reduce the use of electricity.

[0034] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model.

Claims

1. A lift, comprising a base, a guide rail and a lift mounting plate; the guide rail extends upward above the base; the lift mounting plate is connected to the guide rail and slides up and down along the guide rail; characterized in that: It also includes a gravity balancing device, which includes a cylinder, an air intake control valve and a pressure release valve; the output end of the cylinder is connected to the lifting mounting plate and provides a supporting force thereto, and the input end of the cylinder is respectively connected to the air intake control valve and the pressure release valve; when working, the gas enters the cylinder through the air intake control valve, and the excess gas in the cylinder flows out from the pressure release valve.

2. The lift according to claim 1, characterized in that: The air intake control valve is a one-way valve.

3. The lift according to claim 1, characterized in that: It also includes a controller; the gravity balance device also includes a pressure control switch electrically connected to the controller and the intake control valve respectively; the intake control valve is a normally closed solenoid valve; the controller controls the opening and closing of the intake control valve through the pressure control switch according to the internal pressure of the cylinder.

4. The lift according to any one of claims 1 to 3, characterized in that: The gravity balancing device further comprises a pressure reducing valve connected between the outlet of the air intake control valve and the input end of the cylinder.

5. A gravity balancing device, characterized in that: It includes a cylinder, an air intake control valve and a pressure release valve; the input end of the cylinder is connected to the air intake control valve and the pressure release valve respectively; when working, the gas enters the cylinder through the air intake control valve, and the excess gas in the cylinder flows out from the pressure release valve.

6. The gravity balancing device according to claim 5, characterized in that: It also includes a three-way valve and a pressure reducing valve; the interfaces of the three-way valve are respectively connected to the input end of the cylinder, the outlet of the pressure reducing valve and the inlet of the pressure release valve; the outlet of the intake control valve is connected to the inlet of the pressure reducing valve.

7. The gravity balancing device according to claim 6, characterized in that: The air intake control valve is a one-way valve.

8. The gravity balancing device according to claim 6, characterized in that: It also includes a pressure control switch electrically connected to the intake control valve; the intake control valve is a normally closed solenoid valve, and the pressure control switch controls the on and off of the intake control valve.

9. The gravity balancing device according to claim 6, characterized in that: It also includes a muffler, which is arranged at the output end of the cylinder and / or the outlet of the pressure release valve.

10. The gravity balancing device according to claim 6, characterized in that: The output end of the cylinder is located above the input end of the cylinder.

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