CN109678092B

CN109678092B - Hand-operated ratchet lifter and control method thereof

Info

Publication number: CN109678092B
Application number: CN201910168724.XA
Authority: CN
Inventors: 黄启权
Original assignee: Shenzhen Dongyang Precision Industry Co ltd
Current assignee: Shenzhen Dongyang Precision Industry Co ltd
Priority date: 2019-03-06
Filing date: 2019-03-06
Publication date: 2024-02-06
Anticipated expiration: 2039-03-06
Also published as: CN109678092A

Abstract

The invention discloses a hand-operated ratchet lifter and a control method thereof, wherein the hand-operated ratchet lifter comprises an underframe, two support rods and a workbench, wherein the two ends of the support rods are connected with the underframe and the workbench, the two support rods comprise a first support rod and a second support rod, the first support rod and the second support rod are connected together in a staggered manner, and the ratchet assembly is adopted for hinging; the second supporting rod is provided with a gear groove which is meshed with a gear in the ratchet assembly, so that the second moving rod is driven by the ratchet assembly to move up and down, and the workbench is driven to ascend or descend. The invention adopts the ratchet wheel component to realize the stagnation at any height, thereby ensuring that the whole lifter is more stable and safer in working.

Description

Hand-operated ratchet lifter and control method thereof

Technical Field

The invention relates to the field of elevators, in particular to a hand-operated ratchet elevator and a control method thereof.

Background

With the rapid development of economy in China, the living standard of people is greatly improved, more and more people like outdoor exercises, but danger sometimes occurs during the outdoor exercises, and an outdoor lifting device is needed to carry out necessary first aid; on the other hand, along with the vigorous development of the building industry, more and more high-rise buildings are built, and a great deal of high-rise operations such as outdoor painting and glass installation of the high-rise buildings are required, and certain safety factors exist in the high-rise operations, so that a safe and reliable lifting device is required.

The existing outdoor lifting device mainly comprises two modes: one is to use a motor to drive the rope to freely lift; the other is to use a simple pulley device to perform manual lifting. The two ways above have the following problems: because the power supply is difficult to provide in the outdoor rescue environment, the motor driving device cannot be used outdoors; the motor device needs to be fixed by building a bracket, and needs to be fixed every time when in use, so the use process is inconvenient; although the common pulley device can achieve the effect of saving power in the use process, the common pulley device is difficult to achieve stability in the lifting process, and the device lacks a certain safety device.

Disclosure of Invention

Aiming at the defects in the technology, the invention provides the hand-operated ratchet lifter and the control method thereof, which fully utilize the ratchet component, can realize stable fixation in the ascending and descending stages, realize stagnation at any height and meet the production requirement.

In order to achieve the above purpose, the invention provides a hand-operated ratchet lifter, which comprises a bottom frame, support rods and a workbench, wherein two ends of the support rods are connected with the bottom frame and the workbench, the two support rods comprise a first support rod and a second support rod, the first support rod and the second support rod are connected together in a staggered manner, and the first support rod and the second support rod are hinged by a ratchet assembly; the second supporting rod is provided with a gear groove which is meshed with a gear in the ratchet assembly, so that the second moving rod is driven by the ratchet assembly to move up and down, and the workbench is driven to ascend or descend.

Preferably, the middle part of the first support rod is provided with a groove part, the middle part of the second support rod is provided with a protruding part, the surface of the protruding part is provided with a gear groove, and the two ends of the opening of the groove part are movably clamped with the protruding part, so that the second support rod moves up and down under the limitation of the first support rod.

Preferably, the ratchet assembly comprises a gear box and a rocking handle, a plurality of gears are arranged in the gear box, the gears comprise rotating gears, transmission gears and moving gears, the rocking handle is arranged outside the gear box and fixedly connected with the rotating gears, the rotating gears are meshed with the transmission gears, the transmission gears are meshed with the moving gears, and the moving gears are clamped with the gear grooves of the second supporting rods.

Preferably, the transmission gear comprises a first transmission gear and a second transmission gear, the first transmission gear is meshed with the rotating gear, and the second transmission gear is meshed with the moving gear; the first transmission gear and the second transmission gear are vertically meshed.

Preferably, the ratchet and the brake pad are further arranged beside the rotating gear, the brake pad is sleeved on a rotating rod where the rotating gear is located, the ratchet is sleeved on the brake pad, a pawl is further arranged beside the rotating gear and can be inserted into the ratchet, and the direction of the pawl is opposite to the direction of the ratchet.

Preferably, fixing rods are further arranged on two sides of the ratchet assembly, one ends of the fixing rods are fixed on the ratchet assembly, and the other ends of the fixing rods are fixed on the underframe.

Preferably, the underframe comprises a supporting underframe and a balancing underframe, and the supporting underframe is provided with rollers for the movement of the whole lifter; the balance underframe comprises a balance rod and a switching part, wherein the switching part is fixedly connected with the support underframe, a plurality of limiting holes are formed in the switching part, and a limiting column is inserted into the limiting holes so as to adjust the extending angle of the balance rod.

Preferably, the workbench is arranged at the uppermost end of the lifter, and guard rails are arranged around the workbench.

Preferably, an escalator is further arranged between the workbench and the underframe, the escalator is of a telescopic structure, the lower end of the escalator is fixed on the underframe, and the upper end of the escalator is fixedly connected with the workbench.

The invention also discloses a control method of the hand-operated ratchet lifter, which is applied to the hand-operated ratchet lifter and comprises an ascending step and a descending step;

the rising step is as follows: the rocking handle is rotated, the rotating gear rotates to drive the moving gear to rotate, and the moving gear is clamped with the gear groove to drive the second supporting rod to ascend;

the descending step is as follows: the rocking handle is reversely rotated, the rotating gear transmits reverse rotation to drive the moving gear to reversely rotate, and the moving gear is clamped with the gear groove to drive the second supporting rod to descend.

The beneficial effects of the invention are as follows: the hand-operated ratchet lifter provided by the invention adopts the ratchet component to realize stagnation at any height, is provided with a plurality of gears, and utilizes gears with different tooth numbers to carry out meshing transmission, so that the rocking handle can realize larger height adjustment by rotating at a smaller angle, thereby saving more labor; in the ascending stage, as the direction of the ratchet teeth is opposite to the direction of the pawl, the pawl moves along with the ratchet teeth, and when the shaking is stopped, the pawl is clamped between two teeth of the ratchet teeth, so that the gear is prevented from reversing, and the high stability is ensured; when the workbench is required to descend, the rocking handle rotates reversely, the ratchet cannot rotate along with the rotating gear due to the brake pad, and the rocking handle rotates reversely with the rotating gear, so that the workbench descends. When the ratchet wheel is stopped, the lifting driven gear automatically rotates by 15 degrees under the pressure, the ratchet wheel is braked by the brake pad, and the pawl is meshed with the ratchet wheel to form a braking function.

Drawings

FIG. 1 is a main block diagram of the present invention;

FIG. 2 is a perspective view of the structure of the present invention;

FIG. 3 is a diagram of the ratchet wheel structure of the present invention;

fig. 4 is a structural view of the chassis of the present invention.

The main reference numerals are as follows:

1. underframe 2 and support bar

3. Workbench 4 and fixing rod

5. Staircase 6, ratchet wheel assembly

11. Support chassis 12, balance chassis

13. Roller 121, connection part

122. Balance rod 1211 and limit post

1212. Limiting hole 21 and first supporting rod

22. Second support bar 221 and gear groove

61. Gear box 62, rocking handle

63. Rotating gear 64, moving gear

65. First and second drive gears 66, 66

67. Ratchet 68 and brake pad

69. A pawl.

Detailed Description

In order to more clearly illustrate the invention, the invention is further described below with reference to the accompanying drawings.

Referring to fig. 1, the invention discloses a hand-operated ratchet lifter, which comprises a chassis 1, support rods 2 and a workbench 3, wherein two ends of each support rod 2 are connected with the chassis 1 and the workbench 3, each support rod 2 comprises a first support rod 21 and a second support rod 22, the first support rod 21 and the second support rod 22 are connected together in a staggered manner, and the ratchet assembly 6 is adopted for hinging; the gear groove 221 is arranged on the second supporting rod 22, the gear groove 221 is meshed with a gear in the ratchet assembly 6, so that the second moving rod 22 is driven to move up and down by the ratchet assembly 6, the workbench 3 is driven to ascend or descend, in the embodiment, the gear of the ratchet assembly is adopted to drive the supporting rod to move up and down, and the distance between adjacent groove bodies in the gear groove is the same, so that the distance of each movement is the same in the ascending or descending process, the movement is more stable, the stop at any height can be realized, and the practical use requirement is met.

In order to achieve the technical purpose, the middle part of the first support rod 21 is provided with a groove part, the middle part of the second support rod 22 is provided with a convex part, the surface of the convex part is provided with a gear groove 221, and two ends of the opening of the groove part are movably clamped with the convex part, so that the second support rod 22 moves up and down under the limitation of the first support rod 21, and the second support rod is always in the control range of the first support rod in a sleeving manner during movement; on the one hand, the first supporting rod protects the gear groove, and on the other hand, the groove is matched with the protrusion, so that the gear in the ratchet assembly is meshed with the gear groove more stably, and the workbench is safer and more stable in the ascending and descending processes.

The ratchet assembly 6 comprises a gear box 61 and a rocking handle 62, a plurality of gears are arranged in the gear box 61, the rocking handle 62 comprises a rotating gear 63, a transmission gear and a moving gear 64, the rocking handle 62 is arranged outside the gear box 61 and fixedly connected with the rotating gear 63, the rotating gear 63 is meshed with the transmission gear, the transmission gear is meshed with the moving gear 64, and the moving gear 64 is clamped with a gear groove 221 of the second supporting rod 22; the transmission gears comprise a first transmission gear 65 and a second transmission gear 66, the first transmission gear 65 is meshed with the rotation gear 63, and the second transmission gear 66 is meshed with the movement gear 64; the first transfer gear 65 and the second transfer gear 66 are vertically engaged. In the specific embodiment, the number of the first transmission gears is two, and the gears can rotate with small force through mutual matching among the gears; the second transmission gear is designed into a vertical structure, so that the transmission direction of the whole gear can be effectively changed, and finally the motion gear can be stably clamped into a gear groove of the second support rod.

A ratchet 67 and a brake block 68 are further arranged beside the rotating gear 63, the brake block 68 is sleeved on a rotating rod where the rotating gear 63 is positioned, the ratchet 67 is sleeved on the brake block 68, a pawl 69 is further arranged beside the rotating gear 63, the pawl 69 can be inserted into the ratchet 67, and the direction of the pawl 69 is opposite to the direction of the ratchet 67;

the ratchet assembly 6 is also provided with a fixed rod 4 on both sides, one end of the fixed rod 4 is fixed on the ratchet assembly 6, and the other end is fixed on the underframe 1. In this embodiment, the rotating rod where the rotating gear is located is provided with a triple thread, and is matched with the rotating gear, and the distance between the rotating gear and the brake pad 68 is only 1.0mm, when the rotating gear rotates clockwise, as each tooth in the ratchet adopts an inclined structure, the inclined direction is opposite to the direction of the pawl, when the ratchet rotates, the pawl is continuously inserted between two teeth of the ratchet, and the ratchet cannot be propped against the ratchet, so that the ratchet can be stopped at any height and cannot be suddenly changed; when anticlockwise rotation, the rotation gear is separated from the brake pad according to the thread clearance, and the brake pad does not play a role any more, so that reverse rotation is realized, when no person needs to beat the handle, the rotation gear can rotate 15 degrees to coincide with the brake pad and the ratchet wheel by means of the pressure of the equipment, and stop at any time is realized.

The underframe 1 comprises a supporting underframe 11 and a balancing underframe 12, and a roller 13 for the whole lifter to move is arranged on the supporting underframe 11; the balance chassis 12 comprises a balance rod 122 and a switching part 121, the switching part 121 is fixedly connected with the support chassis 11, a plurality of limit holes 1212 are formed in the switching part 121, and limit posts 1211 are inserted into the limit holes 1212 so as to adjust the extending angle of the balance rod. More specifically, be equipped with powerful spring in the switching portion, spring one end is fixed on supporting the chassis, and the other end fixed connection is on the balancing pole for the balancing pole has the effort towards supporting the chassis direction all the time, like this after the balancing chassis opens, supports more stably to whole lift.

The workbench 3 is arranged at the uppermost end of the lifter, guard rails are arranged around the workbench 3, an escalator 5 is further arranged between the workbench 3 and the underframe, the escalator 5 is of a telescopic structure, the lower end of the escalator 5 is fixed on the underframe 1, and the upper end of the escalator 5 is fixedly connected with the workbench 3.

The invention has the advantages that:

1) The balance underframe is arranged on the underframe, so that the support of the elevator is more stable;

2) The ratchet wheel assembly is used for realizing stagnation at any height, the gears with different numbers of teeth are used for meshed transmission, and the rocking handle can be rotated by a small angle to realize large height adjustment, so that the labor is saved.

The above disclosure is only a few specific embodiments of the present invention, but the present invention is not limited thereto, and any changes that can be thought by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. The hand-operated ratchet lifter is characterized by comprising an underframe, supporting rods and a workbench, wherein two ends of each supporting rod are connected with the underframe and the workbench, each supporting rod comprises a first supporting rod and a second supporting rod, the first supporting rods and the second supporting rods are connected together in a staggered manner, and the first supporting rods and the second supporting rods are hinged by ratchet components; the second supporting rod is provided with a gear groove which is meshed with a gear in the ratchet assembly, so that the second moving rod is driven by the ratchet assembly to move up and down to drive the workbench to ascend or descend;

the middle part of the first support rod is provided with a groove part, the middle part of the second support rod is provided with a protruding part, the surface of the protruding part is provided with the gear groove, and the two ends of the opening of the groove part are movably clamped with the protruding part, so that the second support rod moves up and down under the limitation of the first support rod;

the ratchet wheel assembly comprises a gear box and a rocking handle, a plurality of gears are arranged in the gear box, the rocking handle comprises a rotating gear, a transmission gear and a moving gear, the rocking handle is arranged outside the gear box and fixedly connected with the rotating gear, the rotating gear is meshed with the transmission gear, the transmission gear is meshed with the moving gear, and the moving gear is clamped with a gear groove of the second supporting rod;

the transmission gear comprises a first transmission gear and a second transmission gear, the first transmission gear is meshed with the rotating gear, and the second transmission gear is meshed with the moving gear; the first transmission gear and the second transmission gear are vertically meshed;

the ratchet wheel and the brake pad are arranged beside the rotating gear, the brake pad is sleeved on a rotating rod where the rotating gear is located, the ratchet wheel is sleeved on the brake pad in a ring mode, a pawl is also arranged beside the rotating gear and can be inserted into the ratchet wheel, and the direction of the pawl is opposite to the direction of the gear of the ratchet wheel;

the two sides of the ratchet wheel component are also provided with fixing rods, one ends of the fixing rods are fixed on the ratchet wheel component, and the other ends of the fixing rods are fixed on the underframe;

the chassis comprises a supporting chassis and a balancing chassis, and the supporting chassis is provided with rollers for the whole lifter to move; the balance underframe comprises a balance rod and a switching part, the switching part is fixedly connected with the support underframe, a plurality of limiting holes are formed in the switching part, and limiting columns are inserted into the limiting holes so as to adjust the extending angle of the balance rod;

the workbench is arranged at the uppermost end of the lifter, and guard rails are arranged around the workbench;

the automatic lifting device is characterized in that an escalator is further arranged between the workbench and the underframe, the escalator is of a telescopic structure, the lower end of the escalator is fixed on the underframe, and the upper end of the escalator is fixedly connected with the workbench.

2. A control method of a hand-operated ratchet lifter, characterized in that the control method is applied to the hand-operated ratchet lifter according to claim 1, and includes a rising step and a falling step;