Long-stroke hydraulic hoist

Abstract

The utility model relates to a long-stroke hydraulic hoist which comprises a horizontal hydraulic cylinder body, a front rack and a rear rack are arranged at the front end and the rear end of the hydraulic cylinder body respectively, the upper ends of the front rack and the rear rack are supported on the outer surface of the hydraulic cylinder body, and the lower ends of the front rack and the rear rack are fixed on the ground. A hydraulic cylinder is arranged on the front rack, a hydraulic control box is arranged at the position, located between the front rack and the rear rack, of the hydraulic cylinder, the hydraulic cylinder penetrates through the hydraulic control box, and the contact part of the hydraulic cylinder and the contact part of the hydraulic control box are connected in a welded mode. The position of the oil tank is flexibly adjusted according to actual conditions before installation, so that the overall stress distribution of the hoist is optimized, unnecessary stress and deformation are reduced, the stability of the hoist is improved, the service life of the hoist is prolonged, tail control of the hydraulic oil cylinder can be omitted, and installation of various stroke sensors is facilitated.

Description

Technical Field

[0001] This utility model belongs to the technical field of locking cylinders, and particularly relates to a long-stroke hydraulic gate opener. Background Technology

[0002] A patent entitled "A Hydraulic Gate Opener" is disclosed in the existing Chinese patent database, with application number CN201922227953.2 and application date of 2019-12-12. This hydraulic gate opener includes a frame and a hydraulic cylinder. The hydraulic cylinder is fixedly mounted on one side of the frame. A movable pulley system is provided at the piston rod end of the hydraulic cylinder, and a fixed pulley system is provided at the bottom end of the cylinder. A guide wheel is provided on the side of the hydraulic cylinder away from the piston rod end. Two tie rods are provided on the side of the cylinder body, each connected to a steel wire rope. One steel wire rope wraps around the movable and fixed pulley systems 1 to 5 times before connecting to a gate lifting point. The other steel wire rope wraps around the movable and fixed pulley systems 1 to 5 times before leading to the guide wheel and connecting to another gate lifting point. This utility model's hydraulic gate opener has a compact structure and occupies a small area.

[0003] In existing technologies, long-stroke gate hoists need to withstand large forces and torques during operation. Under these conditions, the gate hoist will generate some stress and deformation, resulting in a reduction in the service life of the gate hoist. This paper aims to propose a long-stroke hydraulic gate hoist that optimizes the overall force distribution of the gate hoist and improves its stability by passing the cylinder shaft through the hydraulic tank. Utility Model Content

[0004] The technical problem to be solved by this utility model is how to optimize the overall force distribution of the gate hoist and how to avoid the piston rod head bearing an off-center load in the non-working state. In order to improve its shortcomings, this utility model provides a long-stroke hydraulic gate hoist.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution:

[0006] A long-stroke hydraulic gate hoist includes a horizontal hydraulic cylinder body. A front frame and a rear frame are respectively provided at the front and rear ends of the hydraulic cylinder body. The upper ends of the front frame and the rear frame are supported on the outer surface of the hydraulic cylinder body, and the lower ends are fixed to the ground. A hydraulic control box is provided at the hydraulic cylinder body located between the front frame and the rear frame. The hydraulic cylinder body passes through the hydraulic control box, and the contact part between the hydraulic cylinder body and the hydraulic control box is welded together.

[0007] As a preferred embodiment, the rear frame includes a lower base fixed to the ground, an upper base spaced above the lower base, a locking bolt inserted between the upper and lower bases, a locking nut screwed onto the upper end of the locking bolt passing through the upper base, a compression spring sleeved on the locking bolt located between the upper and lower bases, a vertical plate integrally provided on the upper base, a horizontally arranged half flange connected to the vertical plate by bolts, and the inner ring of the half flange welded to the outer surface of the hydraulic cylinder body.

[0008] As a preferred embodiment, the front frame includes a base fixed to the ground, a support seat is bolted to the upper surface of the base, and the hydraulic cylinder is disposed through the support seat and welded to the support seat.

[0009] As a preferred embodiment, the hydraulic control box includes a bidirectional oil pump, and a control motor is installed outside the hydraulic control box, with the output end of the control motor connected to the input end of the bidirectional oil pump.

[0010] As a preferred embodiment, a rope sensor is provided at the bottom of the cylinder of the hydraulic cylinder.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. This design integrates the hydraulic cylinders within the hydraulic control box, allowing for adjustment of the hoist's center of gravity and thus improving its stress distribution. Before installation, the oil tank position can be flexibly adjusted based on actual conditions to optimize the overall stress distribution of the hoist. This helps reduce unnecessary stress and deformation, improving the hoist's stability and service life. Simultaneously, it frees up the control area at the tail of the hydraulic cylinders, facilitating the installation of various stroke sensors.

[0013] 2. The addition of a spring-buffered rear support at the tail of the hydraulic cylinder solves the problem of uneven load on the piston rod head caused by its own weight when the hoist is not in operation. By adding a spring-buffered rear support at the tail of the cylinder, an additional support point can be provided, effectively distributing the weight of the piston rod head. This device is suitable for industrial production and has strong practicality. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model.

[0015] Figure 2 This is a schematic diagram of the rear frame structure in this utility model.

[0016] Figure 3 This is a schematic diagram of the front frame structure in this utility model.

[0017] In the diagram: 1 Hydraulic cylinder body, 2 Front frame, 201 Base, 202 Support base, 3 Rear frame, 301 Lower base, 302 Upper base, 303 Locking bolt, 304 Locking nut, 305 Compression spring, 306 Vertical plate, 307 Half flange, 4 Hydraulic control box, 5 Control motor, 6 Pull rope sensor. Detailed Implementation

[0018] The technical solution of this application will be further described below with reference to the accompanying drawings and embodiments.

[0019] like Figure 1-3 As shown, a long-stroke hydraulic gate hoist includes a horizontal hydraulic cylinder 1. A front frame 2 and a rear frame 3 are respectively provided at the front and rear ends of the hydraulic cylinder 1. The upper ends of the front frame 2 and the rear frame 3 are supported on the outer surface of the hydraulic cylinder 1, and the lower ends are fixed to the ground. A hydraulic control box 4 is provided at the hydraulic cylinder 1 between the front frame 2 and the rear frame 3. The hydraulic cylinder 1 passes through the hydraulic control box 4, and the contact parts of the hydraulic cylinder 1 and the hydraulic control box 4 are welded together. The rear frame 3 includes a lower base 301 fixed to the ground, an upper base 302 spaced above the lower base 301, a locking bolt 303 passing between the upper base 302 and the lower base 301, a locking nut 304 screwed onto the upper end of the locking bolt 303 passing through the upper base 302, a compression spring 305 sleeved on the locking bolt 303 located between the upper base 302 and the lower base 301, a vertical plate 306 integrally provided on the upper base 302, a horizontally arranged half-flange 307 bolted to the vertical plate 306, the inner ring of the half-flange 307 welded to the outer surface of the hydraulic cylinder body 1. The front frame 2 includes a base 201 fixed to the ground, a support seat 202 bolted to the upper surface of the base 201, the hydraulic cylinder body 1 passing through the support seat 202 and welded to the support seat 202. The hydraulic control box 4 contains a bidirectional oil pump, and a control motor 5 is installed outside the hydraulic control box 4. The output end of the control motor 5 is connected to the input end of the bidirectional oil pump. A pull rope sensor 6 is installed at the bottom of the cylinder of the hydraulic cylinder body 1.

[0020] The working principle of the gate hoist is as follows: The motor 5 is controlled to rotate in both directions, driving a bidirectional oil pump to output pressurized oil, forming a certain hydraulic system pressure. Liquid flow and control: The pressurized oil is regulated by the oil circuit integration block and hydraulic valves to control the flow direction and flow rate. The hydraulic valves precisely adjust the pressure and flow rate of the liquid according to the input control signal to meet the opening and closing requirements of the mechanical device. Movement within the hydraulic cylinder 1: The regulated liquid enters the hydraulic cylinder 1, pushing the piston in a reciprocating motion. This movement process realizes the opening and closing function of the gate.

[0021] A rear frame 3 is added to the tail of the hydraulic cylinder body 1. During operation, the piston rod of a long-stroke gate hoist, due to its length, often bears a significant weight. When the hoist is not in operation, the piston rod may deflect due to gravity, causing uneven load on the rod head. This uneven load not only increases friction and wear between the piston rod and the hydraulic cylinder body 1 but may also affect the stability and accuracy of the hoist. By adding a rear frame 3 to the tail of the hydraulic cylinder body 1, an additional support point is provided, effectively distributing the weight of the piston rod head. Thus, even when the hoist is not in operation, the piston rod maintains a relatively stable posture, reducing deformation and wear caused by uneven gravity load, thereby improving the service life of the hoist. The design of the rear frame 3 not only helps to improve the uneven gravity load situation but also plays a role in buffering and shock absorption during the operation of the hoist. When the piston rod moves rapidly or is impacted, the rear frame 3, through the compression spring 305, can absorb some energy, reducing the impact and vibration between the piston rod and the hydraulic cylinder body 1.

[0022] This utility model is not limited to the above embodiments. Based on the technical solutions disclosed in this utility model, those skilled in the art can make some substitutions and modifications to some of the technical features without creative labor, and these substitutions and modifications are all within the protection scope of this utility model.

Claims

1. A long-stroke hydraulic gate hoist, characterized in that: The device includes a horizontal hydraulic cylinder body (1), with a front frame (2) and a rear frame (3) respectively provided at the front and rear ends of the hydraulic cylinder body (1). The upper ends of the front frame (2) and the rear frame (3) are supported on the outer surface of the hydraulic cylinder body (1), and the lower ends are fixed to the ground. A hydraulic control box (4) is provided at the hydraulic cylinder body (1) between the front frame (2) and the rear frame (3). The hydraulic cylinder body (1) passes through the hydraulic control box (4), and the contact part of the hydraulic cylinder body (1) and the hydraulic control box (4) is welded together.

2. The long-stroke hydraulic gate opener according to claim 1, characterized in that: The rear frame (3) includes a lower base (301) fixed to the ground. An upper base (302) is spaced above the lower base (301). A locking bolt (303) is inserted between the upper base (302) and the lower base (301). A locking nut (304) is screwed onto the upper end of the locking bolt (303) passing through the upper base (302). A compression spring (305) is sleeved on the locking bolt (303) located between the upper base (302) and the lower base (301). A vertical plate (306) is integrally provided on the upper base (302). A horizontally arranged half flange (307) is bolted to the vertical plate (306). The inner ring of the half flange (307) is welded to the outer surface of the hydraulic cylinder body (1).

3. A long-stroke hydraulic gate opener according to claim 2, characterized in that: The front frame (2) includes a base (201) fixed to the ground. A support seat (202) is bolted to the upper surface of the base (201). The hydraulic cylinder (1) passes through the support seat (202) and is welded to the support seat (202).

4. A long-stroke hydraulic gate opener according to claim 3, characterized in that: The hydraulic control box (4) includes a bidirectional oil pump, and a control motor (5) is installed outside the hydraulic control box (4). The output end of the control motor (5) is connected to the input end of the bidirectional oil pump.

5. A long-stroke hydraulic gate opener according to any one of claims 1-4, characterized in that: A rope sensor (6) is provided at the bottom of the cylinder of the hydraulic cylinder body (1).

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