A hydraulic control device for an elevator
By using a leak-proof mechanism with rubber rings and rubber pads in the hydraulic control device of the elevator, combined with components such as fixing blocks and limit rods, the problem of oil leakage caused by loose connection between the filter and oil pipe is solved, and a tight connection between the filter and the oil tank and hydraulic pump is achieved, improving the sealing and stability of the device.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- LINHAI SHIDA MACHINERY CO LTD
- Filing Date
- 2025-08-15
- Publication Date
- 2026-06-30
AI Technical Summary
In existing hydraulic control devices for elevators, vibration forces can easily be transmitted to the connection between the filter and the oil pipe during operation, causing the connection between the filter and the oil pipe to loosen and resulting in oil leakage.
The leak-proof mechanism, consisting of a rubber ring and a rubber ring working together, along with a fixed block, a blocking block, a limiting rod, and a semi-circular block, restricts the movement of the threaded sleeve, ensuring a tight connection between the filter and the oil tank and hydraulic pump. The spring's elastic force pushes the positioning block downwards and locks it inside the limiting rod and the semi-circular block, thus achieving stable locking of the rubber ring.
This effectively prevents oil leakage at the connection between the filter and the oil tank and hydraulic pump, ensures a tight connection between the filter and the oil tank and hydraulic pump, prevents the threaded sleeve from loosening, and improves the sealing and stability of the device.
Smart Images
Figure CN224433002U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of hydraulic control technology for elevators, and in particular to a hydraulic control device for elevators. Background Technology
[0002] A lift is a mechanical device used for vertically lifting people or goods. In logistics distribution centers, hydraulic lifts are mostly used to unload or load goods from transport vehicles, thereby speeding up the turnover of goods.
[0003] Existing hydraulic control devices for lifting platforms work together with hydraulic pumps, oil tanks, hydraulic cylinders, control devices, and filters connected by oil pipe threads to achieve stable lifting and safe locking of the lifting platform by precisely controlling the flow and pressure of hydraulic oil.
[0004] However, the vibration generated by the elevator during operation can easily be transmitted to the connection between the filter and the corresponding oil pipe, which can easily cause the connection between the filter and the corresponding oil pipe to loosen, resulting in oil leakage. Utility Model Content
[0005] Therefore, it is necessary to provide a hydraulic control device for elevators to address the problem that the vibration force generated by the elevator during operation can easily be transmitted to the connection between the filter and the corresponding oil pipe, which can easily lead to loosening of the connection between the filter and the corresponding oil pipe.
[0006] The system includes: a hydraulic pump, an oil tank, and a filter. Both ends of the filter's surface are rotatably connected to threaded sleeves. The inner wall of one threaded sleeve is threadedly connected to the surface of the hydraulic pump, and the inner wall of the other threaded sleeve is threadedly connected to the surface of the oil tank. A leak-proof mechanism includes a rubber ring fixedly connected to one end of the threaded sleeve. Rubber rings are fixedly connected to the surfaces of both the hydraulic pump and the oil tank. The surface of the rubber ring is engaged with the inner wall of the rubber ring. Two fixing blocks are fixedly connected to the surface of the threaded sleeve. A blocking block, a limiting rod, and a semi-circular block are slidably connected to the inner wall of each fixing block.
[0007] In one embodiment, a positioning block is slidably connected to the inner wall of the fixing block, and the surface of the positioning block is engaged with the limiting rod and the inner wall of the semicircular block.
[0008] In one embodiment, the surface of the limiting rod is slidably connected to the inner wall of the blocking block.
[0009] In one embodiment, the inner wall of the fixing block is fitted with an anti-slip pad, the bottom of which contacts the end of the positioning block.
[0010] In one embodiment, a spring is fixedly connected to the end of the positioning block, and the bottom end of the spring is fixedly connected to the top of the fixing block.
[0011] In one embodiment, a slider is fixedly connected to the surface of the semicircular block, and the surface of the slider is slidably connected to the inner wall of the fixed block. The slider limits the lateral movement range of the semicircular block, preventing it from detaching from the fixed block during lateral movement.
[0012] In one embodiment, a nylon rope is fixedly connected to the top of the anti-slip mat, and the other end of the nylon rope is fixedly connected to the top of the fixing block. The nylon rope is used to limit the placement range of the anti-slip mat and avoid the risk of the anti-slip mat being lost.
[0013] In one embodiment, two guide rods are fixedly connected to the top of the fixing block, and the inner wall of the positioning block is slidably connected to the surface of the guide rods. The guide rods limit the upward movement of the positioning block, preventing it from moving upward and detaching from the fixing block.
[0014] Beneficial effects
[0015] 1. By using rubber rings and rubber rings in combination, the connection between the filter and the oil tank and hydraulic pump is sealed, reducing oil leakage at the connection between the filter and the oil tank and hydraulic pump. By using fixed blocks, resistance blocks, limit rods and semi-circular blocks in combination, the lateral movement of the rubber ring and threaded sleeve is restricted, thereby preventing the threaded sleeve from loosening with the oil tank and hydraulic pump, thus ensuring a tight connection between the filter and the oil tank and hydraulic pump and preventing oil leakage at the connection between the filter and the oil tank and hydraulic pump.
[0016] 2. The spring's elastic force pushes the positioning block downwards and locks it inside the limiting rod and semicircular block. The anti-slip pad locks it inside the fixed block and abuts against the end of the positioning block, thus locking the longitudinal movement of the positioning block. This ensures that the limiting rod and semicircular block are stably located inside the blocking block, which in turn ensures that the blocking block stably abuts against one end of the rubber ring, thereby ensuring a tight connection between the filter and the oil tank and hydraulic pump. Attached Figure Description
[0017] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0019] Figure 2 This is an exploded view of the filter and fuel tank of this utility model;
[0020] Figure 3 This is an exploded view of the filter and rubber ring of this utility model;
[0021] Figure 4 This utility model Figure 3 Enlarged view of point A in the middle;
[0022] Figure 5 This utility model Figure 3 Enlarged view of point B in the middle.
[0023] Figure label:
[0024] 100. Hydraulic pump; 200. Oil tank; 300. Filter; 400. Threaded sleeve; 500. Leak-proof mechanism; 501. Rubber ring; 502. Rubber ring; 503. Fixing block; 504. Blocking block; 505. Limiting rod; 506. Semicircular block; 507. Positioning block; 508. Anti-slip pad; 509. Spring; 510. Nylon rope; 511. Guide rod; 512. Slider. Detailed Implementation
[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.
[0026] The following is combined Figures 1-5 This invention describes a hydraulic control device for an elevator.
[0027] In one embodiment, a hydraulic control device for an elevator includes: a hydraulic pump 100, an oil tank 200, and a filter 300. Both ends of the filter 300 are rotatably connected to threaded sleeves 400. The inner wall of one threaded sleeve 400 is threadedly connected to the surface of the hydraulic pump 100, and the inner wall of the other threaded sleeve 400 is threadedly connected to the surface of the oil tank 200. A leak-proof mechanism 500 includes a rubber ring 502 fixedly connected to one end of the threaded sleeve 400. Rubber rings 501 are fixedly connected to the surfaces of both the hydraulic pump 100 and the oil tank 200. The surface of the rubber ring 502 is engaged with the inner wall of the rubber ring 501. Two fixing blocks 503 are fixedly connected to the surface of the threaded sleeve 400. A blocking block 504, a limiting rod 505, and a semi-circular block 506 are slidably connected to the inner wall of each fixing block 503.
[0028] It should be noted that the oil inlet pipe of the hydraulic pump 100 is a rubber hose component, which has a certain degree of flexibility and hardness.
[0029] Hydraulic lifts typically consist of a scissor arm, base, platform, and hydraulic control device. The model of a hydraulic lift that can be selected is GTJZ-6. Hydraulic lifts are a relatively mature technology, and the specific model can be selected according to actual needs.
[0030] Hydraulic control devices typically consist of a hydraulic pump 100, an oil tank 200, a filter 300, a hydraulic cylinder, a directional valve, a relief valve, a throttle valve, etc.
[0031] When a hydraulic lift is used for unloading or loading in a material distribution center, the hydraulic pump 100 automatically starts when the operator presses the lift button. The hydraulic pump 100 draws hydraulic oil from the oil tank 200 into the filter 300 for filtration before flowing back into the pump. The oil is then transported through oil pipes to the directional valve. Under the action of a control signal, the directional valve switches to the lift position, allowing hydraulic oil to enter the rodless chamber of the hydraulic cylinder. As hydraulic oil is continuously injected, the pressure inside the hydraulic cylinder gradually increases, pushing the piston upwards. The piston's movement causes the scissor arms to extend, thus raising the platform to the appropriate height. During the lifting process, the relief valve can regulate the system pressure to prevent excessive pressure from damaging the equipment.
[0032] When descent is required, the operator presses the descent button, switching the directional valve to the descent position and connecting the rodless chamber of the hydraulic cylinder to the oil tank 200. At this time, the hydraulic oil in the cylinder, under the influence of the load and its own weight, flows back to the oil tank 200 through the directional valve. As the hydraulic oil flows out, the pressure inside the cylinder gradually decreases, the piston moves downward, the scissor arm retracts, and the platform descends. The throttle valve can regulate the flow rate of the hydraulic oil, controlling the descent speed and ensuring a smooth platform descent.
[0033] When the platform rises or falls to the desired position, the operator presses the stop button, the directional valve returns to the neutral position, and the hydraulic oil flow path is cut off. At this time, the hydraulic oil in the hydraulic cylinder is sealed, the piston stops moving, and the platform stops at the current position. Simultaneously, the hydraulic pump 100 is automatically shut off.
[0034] In this embodiment, when the filter 300 needs to be replaced, the hydraulic pump 100 is shut off, and the valve on the oil pipe of the oil tank 200 is turned to seal the inside of the oil pipe. At this time, the positioning block 507 is pulled upward away from the limit rod 505 and the semi-circular block 506, and the semi-circular block 506 is pulled laterally away from the inner wall of the fixed block 503 and away from the surface of the limit rod 505. The limit rod 505 is rotated to a suitable angle, and the limit rod 505 is pulled to move within the fixed block 503 and away from the blocking block 504. The blocking block 504 is pulled away from one end of the rubber ring 501, thereby releasing the lock on the threaded sleeve 400. The other threaded sleeve 400 is then released. At this time, one of the threaded sleeves 400 is rotated so that it moves away from the surface of the rubber tube on the hydraulic pump 100. Because the rubber tube has a certain degree of flexibility, it can bend to a certain extent, allowing one of the threaded sleeves 400 to move away from the rubber tube. The other threaded sleeve 400 is then rotated and the filter 300 is pulled away from the oil tank 200, so that the other threaded sleeve 400 moves away from the oil tank 200, thus separating the filter 300 from both the hydraulic pump 100 and the oil tank 200.
[0035] like Figure 4 As shown, a positioning block 507 is slidably connected to the inner wall of the fixing block 503. The surface of the positioning block 507 is engaged with the inner wall of the limiting rod 505 and the semi-circular block 506. The surface of the limiting rod 505 is slidably connected to the inner wall of the blocking block 504. An anti-slip pad 508 is engaged with the inner wall of the fixing block 503. The bottom of the anti-slip pad 508 contacts the end of the positioning block 507. A spring 509 is fixedly connected to the end of the positioning block 507. The bottom end of the spring 509 is fixedly connected to the top of the fixing block 503.
[0036] The threaded sleeve 400, rubber ring 501, rubber ring 502, limit rod 505, spring 509 and anti-slip pad 508 are all nitrile rubber components, which have corrosion resistance, high elasticity, good flexibility and sealing performance.
[0037] In this embodiment, a new filter 300 is installed on the surface of the oil pipe on the oil tank 200, and the other end of the filter 300 is installed on the surface of the rubber pipe on the hydraulic pump 100. Two threaded sleeves 400 are respectively threaded onto the oil tank 200 and the hydraulic pump 100, so that the rubber ring 502 is locked inside the rubber ring 501. The blocking block 504 is pushed to move longitudinally and abut against one end of the rubber ring 501, pushing the limiting rod 505 to move laterally within the fixed block 503 and slide into the blocking block 504. After one end of the limiting rod 505 moves out of the fixed block 503, the limiting rod 505 is rotated so that the limiting rod 505... The end of 05 abuts against one side of the fixed block 503, pushing the semicircular block 506 to move laterally and slide into the fixed block 503, loosening the restriction on the positioning block 507. The elastic force of the spring 509 pushes the positioning block 507 down and locks it in the limit rod 505 and the semicircular block 506, locking the two anti-slip pads 508 in the fixed block 503 respectively and making the bottom of the anti-slip pads 508 abut against the end of the positioning block 507, thereby stabilizing and locking the blocking block 504, making the blocking block 504 stably abut against one end of the rubber ring 501, and making the threaded sleeve 400 stably threaded on the hydraulic pump 100 and the oil tank 200.
[0038] like Figure 4 As shown, a slider 512 is fixedly connected to the surface of the semicircular block 506, and the surface of the slider 512 is slidably connected to the inner wall of the fixed block 503. A nylon rope 510 is fixedly connected to the top of the anti-slip pad 508, and the other end of the nylon rope 510 is fixedly connected to the top of the fixed block 503. Two guide rods 511 are fixedly connected to the top of the fixed block 503, and the inner wall of the positioning block 507 is slidably connected to the surface of the guide rods 511.
[0039] Working principle: The rubber ring 502 is locked inside the rubber ring 501, pushing the blocking block 504 to move longitudinally and abut against one end of the rubber ring 501, pushing the limiting rod 505 to move laterally inside the fixed block 503 and slide into the blocking block 504. The limiting rod 505 is rotated so that the end of the limiting rod 505 abuts against one side of the fixed block 503, pushing the semi-circular block 506 to move laterally and slide into the fixed block 503, loosening the restriction on the positioning block 507. The elastic force of the spring 509 pushes the positioning block 507 down and locks it inside the limiting rod 505 and the semi-circular block 506, locking the two anti-slip pads 508 into the fixed block 503 respectively and making the bottom of the anti-slip pads 508 abut against the end of the positioning block 507, so that the blocking block 504 is stably abutting against one end of the rubber ring 501, and the threaded sleeve 400 is stably threaded on the hydraulic pump 100 and the oil tank 200.
[0040] It should be noted that the hydraulic pump 100, oil tank 200 and filter 300 mentioned above are all components with relatively mature existing technology. The specific models can be selected according to actual needs. At the same time, the hydraulic pump 100 can be powered by the built-in power supply or by the mains power. The specific power supply method is selected according to the situation and will not be elaborated here.
[0041] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.
Claims
1. An elevator hydraulic control device characterized by comprising: include: The filter (300) includes a hydraulic pump (100), an oil tank (200), and a filter (300). Both ends of the surface of the filter (300) are rotatably connected with threaded sleeves (400). The inner wall of one of the threaded sleeves (400) is threadedly connected to the surface of the hydraulic pump (100), and the inner wall of the other threaded sleeve (400) is threadedly connected to the surface of the oil tank (200). Leakage prevention mechanism (500) includes a rubber ring (502) fixedly connected to one end of a threaded sleeve (400), and rubber rings (501) fixedly connected to the surfaces of the hydraulic pump (100) and the oil tank (200). The surface of the rubber ring (502) is snapped into the inner wall of the rubber ring (501). Two fixing blocks (503) are fixedly connected to the surface of the threaded sleeve (400). A blocking block (504), a limiting rod (505), and a semi-circular block (506) are slidably connected to the inner wall of the fixing block (503).
2. The hydraulic control device for an elevator according to claim 1, characterized in that, The inner wall of the fixed block (503) is slidably connected to a positioning block (507), and the surface of the positioning block (507) is engaged with the inner wall of the limiting rod (505) and the semi-circular block (506).
3. The hydraulic control device for a lift according to claim 1, characterized in that, The surface of the limiting rod (505) is slidably connected to the inner wall of the blocking block (504).
4. The hydraulic control device for an elevator according to claim 1, characterized in that, The inner wall of the fixing block (503) is fitted with an anti-slip pad (508), and the bottom of the anti-slip pad (508) contacts the end of the positioning block (507).
5. The hydraulic control device for an elevator according to claim 4, characterized in that, A spring (509) is fixedly connected to the end of the positioning block (507), and the bottom end of the spring (509) is fixedly connected to the top of the fixing block (503).
6. The hydraulic control device for an elevator according to claim 1, characterized in that, A slider (512) is fixedly connected to the surface of the semicircular block (506), and the surface of the slider (512) is slidably connected to the inner wall of the fixed block (503).
7. The hydraulic control device for a lift according to claim 4, characterized in that, The top of the anti-slip mat (508) is fixedly connected to a nylon rope (510), and the other end of the nylon rope (510) is fixedly connected to the top of the fixing block (503).
8. The hydraulic control device for an elevator according to claim 5, characterized in that, The top of the fixing block (503) is fixedly connected to two guide rods (511), and the inner wall of the positioning block (507) is slidably connected to the surface of the guide rods (511).