Overload prevention mechanism of hydraulic direct-jacking type simple elevator

Abstract

An overload protection mechanism of a hydraulic direct jacking type simple elevator comprises a lift car jacking frame, a connecting base, an oil cylinder guide rail frame, a main road jacking oil cylinder connected with the connecting base, branch jacking oil cylinders arranged on the two sides of the main road jacking oil cylinder and a pump station connected with the branch jacking oil cylinders. A pin shaft sensor is arranged at the bottom of the lift car jacking frame, and the oil cylinder guide rail frame is connected with the lift car jacking frame through the pin shaft sensor. The pin shaft sensor is directly mounted on the lift car jacking frame of the simple lift through the oil cylinder guide rail frame, so that the pin shaft sensor detects the load capacity of the simple lift at the first time, whether the simple lift is overloaded or not can be more accurately and quickly measured, an alarm is given out to break a circuit, and the use safety of the simple lift is ensured; and maintenance is convenient and safe.

Description

Technical Field

[0001] The utility model relates to an anti-overload mechanism, in particular to an anti-overload mechanism for a hydraulic straight-top simple lift. Background Art

[0002] At present, most of the simple lifts in China adopt the hydraulic direct top method. In order to prevent and detect overloading when users use the simple lift, a weight sensor device must be installed. The weight sensor devices of the hydraulic direct top simple lifts in China are mostly installed at the bottom of the simple lift car, which plays the role of overload alarm. This method is not very convenient and safe in terms of maintenance, and the maintenance cost is high. Summary of the invention

[0003] The technical problem to be solved by the utility model is to provide an anti-overload mechanism of a hydraulic straight-top simple lifter, which can quickly detect whether the machine is overloaded and has a simple structure and is easy to maintain.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: an anti-overload mechanism for a hydraulic straight-top simple lift, including a car lifting frame, a connecting seat, a cylinder guide frame, a main lifting cylinder connected to the connecting seat, a branch lifting cylinder arranged on both sides of the main lifting cylinder, and a pump station connected to the branch lifting cylinder; a pin shaft sensor is provided at the bottom of the car lifting frame, and the cylinder guide frame is connected to the car lifting frame through the pin shaft sensor.

[0005] As an improvement, the pin shaft sensor adopts a sensor pin shaft of the same model and specification as that of the construction hoist.

[0006] As an improvement, the top end of the main lifting cylinder is directly connected to the connecting seat via connecting bolts, the connecting seat is connected to the cylinder guide frame via bolts, and the cylinder guide frame is connected to the car lifting frame via a pin shaft sensor.

[0007] As an improvement, the branch lifting cylinder includes a first lifting cylinder and a second lifting cylinder, a first branch oil inlet is provided at the bottom of the branch lifting cylinder, and a second branch oil inlet is provided on the top of the first lifting cylinder; a high-pressure oil pipe is provided in the main lifting cylinder, the second branch oil inlet is connected with one end of the high-pressure oil pipe through a short connecting oil pipe, and the other end of the high-pressure oil pipe leads to the bottom of the main lifting cylinder; a main circuit oil pipe is provided on the pump station; the other end of the main circuit oil pipe is connected with the first oil inlet pipe and the second oil inlet pipe through a tee, and the first circuit oil pipe and the second circuit oil pipe are respectively connected to the first branch oil inlet on the branch lifting cylinder.

[0008] The beneficial effects of the utility model are as follows: the pin shaft sensor is directly installed on the lifting frame of the simple elevator car through the cylinder guide frame, so that the pin shaft sensor can detect the load weight of the simple elevator at the first time, and can more accurately and quickly determine whether the simple elevator is overloaded, thereby issuing an alarm and disconnecting the line, ensuring the safe use of the simple elevator, convenient and safe maintenance, and simple structure; the pin shaft sensor directly uses the sensor pin shaft of the same model and specification as the construction elevator, which is easy to purchase and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a front view structural schematic diagram of the utility model.

[0010] Figure 2 It is a side structural schematic diagram of the utility model.

[0011] Explanation of the numbers in the figure: 1. Car lifting frame; 2. Pin shaft sensor; 3. Cylinder guide frame; 4. Connecting seat; 5. Cylinder connecting frame; 6. Main circuit lifting cylinder; 61. High-pressure oil pipe; 7. First lifting cylinder; 8. Pump station; 9. Main circuit oil pipe; 91. First oil inlet pipe; 92. Second oil inlet pipe. Implementation

[0012] The utility model is described in more detail below through the accompanying drawings:

[0013] like Figure 1 As shown, an anti-overload mechanism of a hydraulic straight-top simple lift includes a car lifting frame 1, a connecting seat 4, a cylinder guide frame 3, a main lifting cylinder 6 connected to the connecting seat 4, branch lifting cylinders arranged on both sides of the main lifting cylinder 6, and a pump station 8 connected to the branch lifting cylinder; the top of the main lifting cylinder 6 is directly connected to the connecting seat 4 through a connecting bolt, the connecting seat 4 is connected to the cylinder guide frame 3 through a bolt, and the cylinder guide frame 3 is connected to the car lifting frame 1 through a pin sensor 2. A pin sensor 2 is provided at the bottom of the car lifting frame 1, and the cylinder guide frame 3 is connected to the car lifting frame 1 through the pin sensor 2. The pin shaft sensor 2 is directly installed on the lifting frame 1 of the simple lift car through the oil cylinder guide frame 3, so that the pin shaft sensor 2 detects the load of the simple lift in the first time, and can more accurately and quickly determine whether the simple lift is overloaded. When the simple lift is overloaded, the pin shaft sensor 2 will issue an alarm and disconnect the line, ensuring the safe use of the simple lift, convenient and safe maintenance, and simple structure. The pin shaft sensor 2 uses a sensor pin shaft of the same model and specification as the construction lift; it is convenient to purchase and has a low cost.

[0014] like Figure 1As shown, the oil cylinder includes a main lifting cylinder 6 and a branch lifting cylinder arranged on both sides of the main lifting cylinder 6, and the main lifting cylinder 6 is connected to the branch lifting cylinder through a cylinder connecting frame 5; the branch lifting cylinder includes a first lifting cylinder 7 and a second lifting cylinder, and the bottom of the branch lifting cylinder is provided with a first branch oil inlet, and the top of the first lifting cylinder 7 is provided with a second branch oil inlet; a high-pressure oil pipe 61 is provided in the main lifting cylinder 6, and the second branch oil inlet is connected to one end of the high-pressure oil pipe 61 through a short connecting oil pipe, and the other end of the high-pressure oil pipe 61 is connected to the bottom of the main lifting cylinder 6; a main circuit oil pipe 9 is provided on the pump station 8; the other end of the main circuit oil pipe 9 is connected to the first oil inlet pipe 91 and the second oil inlet pipe 92 through a tee, and the first oil inlet pipe 91 and the second oil inlet pipe 92 are respectively connected to the first branch oil inlets on the first lifting cylinder 7 and the second lifting cylinder.

[0015] The principle of use of this new type is: first, the pump station 8 provides hydraulic oil to the first jacking cylinder 7 and the second jacking cylinder, and then the hydraulic oil in the first jacking cylinder 7 enters the main jacking cylinder 6 through the high-pressure oil pipe 61, and the jacking work begins at this time. Because the pin shaft sensor 2 is directly installed on the simple elevator car jacking frame 1 through the cylinder guide frame 3, the pin shaft sensor 2 detects the load weight of the simple elevator at the first time, and can more accurately and quickly determine whether the simple elevator is overloaded. When encountering an overload situation, it will immediately issue an alarm and disconnect the line to ensure the safe use of the simple elevator.

Claims

1. An anti-overload mechanism for a hydraulic straight-top simple lift, comprising a car lifting frame, a connecting seat, a cylinder guide rail frame, a main lifting cylinder connected to the connecting seat, branch lifting cylinders arranged on both sides of the main lifting cylinder, and a pump station connected to the branch lifting cylinders; characterized in that: A pin shaft sensor is provided at the bottom of the car lifting frame, and the oil cylinder guide rail frame is connected to the car lifting frame through the pin shaft sensor.

2. The anti-overload mechanism of a hydraulic straight-top simple lift as claimed in claim 1 is characterized in that: The pin shaft sensor adopts a sensing pin shaft of the same model and specification as that of the construction hoist.

3. The anti-overload mechanism of a hydraulic straight-top simple lift as claimed in claim 1 is characterized in that: The top end of the main lifting cylinder is directly connected to the connecting seat through connecting bolts, the connecting seat is connected to the cylinder guide frame through bolts, and the cylinder guide frame is connected to the car lifting frame through a pin shaft sensor.

4. The anti-overload mechanism of a hydraulic straight-top simple lift as claimed in claim 1 is characterized in that: The oil cylinder includes a main lifting cylinder and a branch lifting cylinder arranged on both sides of the main lifting cylinder, the branch lifting cylinder includes a first lifting cylinder and a second lifting cylinder, the bottom of the branch lifting cylinder is provided with a first branch oil inlet, and the top of the first lifting cylinder is provided with a second branch oil inlet; a high-pressure oil pipe is arranged in the main lifting cylinder, the second branch oil inlet is connected with one end of the high-pressure oil pipe through a short connecting oil pipe, and the other end of the high-pressure oil pipe leads to the bottom of the main lifting cylinder; a main circuit oil pipe is arranged on the pump station; the other end of the main circuit oil pipe is connected with the first oil inlet pipe and the second oil inlet pipe through a tee, and the first oil inlet pipe and the second oil inlet pipe are respectively connected to the first branch oil inlets on the first lifting cylinder and the second lifting cylinder.

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