Safety protection structure of hydraulic elevator

Abstract

The utility model discloses a safety protection structure of hydraulic elevator mainly relates to hydraulic elevator safety protection field. Including sliding block, the body includes fixed chassis and lift platform, is equipped with hydraulic lifting assembly between fixed chassis and lift platform, and one side of the bottom of hydraulic lifting assembly is equipped with the symmetrical gyro wheel, is equipped with the sliding sleeve on fixed chassis, and the sliding block is connected in the inside of sliding sleeve, is equipped with a plurality of tooth slot on the sliding block, and the inside of sliding sleeve is connected with the limit rod along the vertical sliding, is equipped with compression spring between limit rod and sliding sleeve, and the bottom of limit rod is equipped with the tooth block, and one side of tooth block is equipped with the drive inclined plane of cooperation tooth slot use, and the inside of sliding sleeve is equipped with the lifting block of cooperation tooth block use. The utility model has the beneficial effect that it can solve the technical problem of the risk of falling and bruising caused by the elevator rising process, and the safety of the elevator lifting is improved.

Description

Technical Field

[0001] This utility model relates to the field of safety protection for lifting platforms, specifically a safety protection structure for a hydraulic lifting platform. Background Technology

[0002] Hydraulic lifts utilize the extension and retraction of hydraulic rods for lifting. When the hydraulic rods malfunction, the lift is at risk of falling. Therefore, fall protection is a crucial component of lifts. Existing fall protection typically involves installing a support rod at the lowest point of the lift to ensure it is supported during a fall, thus preventing further injury from a falling object. However, this protective structure only functions when the lift reaches its lowest point and cannot effectively prevent a fall during ascent, meaning the safety of lift protection needs further optimization. Utility Model Content

[0003] The purpose of this utility model is to provide a safety protection structure for a hydraulic lift, which can solve the technical problem of the risk of falling and causing injury during the lifting process. It provides real-time protection during the lifting process to avoid the risk of falling and improve the safety of the lifting.

[0004] To achieve the above objectives, this utility model employs the following technical solution: A safety protection structure for a hydraulic lift includes a slider mounted on a body. The body includes a fixed base and a lifting platform. A hydraulic lifting assembly is provided between the fixed base and the lifting platform. Rollers are symmetrically arranged on one side of the bottom of the hydraulic lifting assembly, and the rollers are in rolling contact with the fixed base. The slider is located on one side of the rollers. A sliding sleeve is provided on the fixed base, and the slider is slidably connected inside the sliding sleeve. The slider has multiple toothed grooves. A limit rod is slidably connected vertically inside the sliding sleeve. A compression spring is provided between the limit rod and the sliding sleeve. A toothed block is provided at the bottom end of the limit rod. A driving inclined surface that cooperates with the toothed grooves is provided on one side of the toothed block. A lifting block that cooperates with the toothed block is provided inside the sliding sleeve.

[0005] Furthermore, the top of the sliding sleeve is provided with a limiting sleeve, the limiting rod passes through the top of the sliding sleeve and is slidably connected inside the limiting sleeve, and the compression spring is disposed between the top of the limiting sleeve and the top of the limiting rod.

[0006] Furthermore, the lifting block is an electromagnet, which magnetically attracts the toothed block when energized.

[0007] Furthermore, the top of the fixed base frame is provided with a groove, the roller is rotatably connected in the groove, and the other side of the roller is rotatably connected with a stop bar that cooperates with the side wall of the groove.

[0008] Furthermore, the stop bar is provided with a locking hole, and the side of the hydraulic lifting assembly is provided with a locking post for use with the locking hole.

[0009] Furthermore, the hydraulic lifting assembly includes a first link and a second link symmetrically arranged, the first link and the second link being rotatably connected, a hydraulic rod being provided between the first link and the second link, the top of the first link being rotatably connected to the lifting platform, the roller being rotatably connected to the bottom of the first link, the bottom of the second link being rotatably connected to the fixed base frame, the top of the second link being provided with a guide post, the bottom of the lifting platform being provided with a guide groove, and the guide post being slidably connected in the guide groove.

[0010] Furthermore, a first connecting post is provided between the two first connecting rods, and a second connecting post is provided between the two second connecting rods. The hydraulic rod is disposed between the first connecting post and the second connecting post, and the roller and the slider are both disposed on the first connecting post.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. The structure of this utility model features rollers symmetrically arranged on one side of the hydraulic lifting assembly. These rollers are rotatably connected to a fixed base frame. A slider is located on one side of each roller, and a sliding sleeve is mounted on the fixed base frame. The slider is slidably connected within the sliding sleeve, and the slider has multiple toothed grooves. A limit rod is vertically slidably connected inside the sliding sleeve, and a compression spring is located between the limit rod and the sliding sleeve. A toothed block is located at the bottom of the limit rod, and a driving inclined surface that engages with the toothed grooves is located on one side of the toothed block. In this structure, when the hydraulic lifting assembly drives the lifting platform upwards, the rollers on one side of the bottom of the assembly roll along the fixed base frame, causing the slider to slide within the sliding sleeve, thus aligning the toothed grooves on the slider with the side of the toothed block. The drive inclined surface contacts the toothed block and the limit rod, which slide upwards to compress the compression spring. After the toothed block passes the tooth groove, it slides downwards to reset under the action of the compression spring and re-engages with the tooth groove on the rear side. Since the toothed block only has a drive inclined surface on one side, the slider cannot slide in the opposite direction relative to the sliding sleeve. Therefore, when the hydraulic lifting component experiences a power failure and the lifting platform falls, the toothed block and tooth groove are used to support the falling of the lifting platform, which greatly improves the safety of lifting. Moreover, the lifting platform can be protected against falling when it rises to any height, realizing real-time protection of the lifting platform and effectively ensuring the safety of the lifting machine. 2. A lifting block is provided inside the sliding sleeve to cooperate with the toothed block. The lifting block can drive the toothed block to rise when the elevator descends, so that the toothed block separates from the tooth groove on the slider after rising. At this time, the slider can slide smoothly in the opposite direction relative to the sliding sleeve, so that the lifting platform can descend smoothly. The structure is simple and the use of fall protection is more flexible. Attached Figure Description

[0012] Appendix Figure 1This is a three-dimensional structural diagram of the present invention.

[0013] Appendix Figure 2 This is a front view of the present invention.

[0014] Appendix Figure 3 This is an appendix to this utility model. Figure 2 A cross-sectional view along the AA direction.

[0015] Appendix Figure 4 This is an appendix to this utility model. Figure 3 A magnified view of part B in the middle.

[0016] Appendix Figure 5 This is an appendix to this utility model. Figure 2 A cross-sectional view along the CC direction.

[0017] The labels shown in the attached diagram: 1. Slider; 2. Fixed base frame; 3. Lifting platform; 4. Roller; 5. Sliding sleeve; 6. Gear groove; 7. Limiting rod; 8. Compression spring; 9. Gear block; 10. Driving inclined plane; 11. Limiting sleeve; 12. Electromagnet; 13. Groove; 14. Stop bar; 15. Locking hole; 16. Locking post; 17. First connecting rod; 18. Second connecting rod; 19. Hydraulic rod; 20. Guide post; 21. Guide groove; 22. First connecting post; 23. Second connecting post. Detailed Implementation

[0018] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the present invention, and these equivalent forms also fall within the scope defined in this application.

[0019] Reference Figure 1 and Figure 2This utility model describes a safety protection structure for a hydraulic lift. The main structure includes a slider 1 mounted on the machine body. The machine body includes a fixed base frame 2 and a lifting platform 3. The fixed base frame 2 is fixed to the ground by welding or anchor bolts. The operator or goods are located on the lifting platform 3. A hydraulic lifting assembly is provided between the fixed base frame 2 and the lifting platform 3. The hydraulic lifting assembly is used to drive the lifting platform 3 to lift relative to the fixed base frame 2. The specific structure can adopt the lifting structure of any existing hydraulic lift. For example, the lifting structure of the fixed scissor lift model DW-0026 sold by Shandong Dongwang Lifting Machinery Co., Ltd. can be referred to. This application does not improve the lifting structure itself, so its specific structure will not be described in detail. The hydraulic lifting assembly has rollers 4 symmetrically connected to one side of its bottom via bearings. These rollers 4 roll in contact with the fixed base frame 2, allowing them to move smoothly on the fixed base frame 2 when the hydraulic lifting assembly is activated. A slider 1 is positioned on one side of the rollers 4, enabling it to move laterally relative to the fixed base frame 2 as the rollers 4 move. A sliding sleeve 5 is fixed to the fixed base frame 2 by welding or bolts. The slider 1 is slidably connected to the inside of the sliding sleeve 5. The top of the slider 1 has multiple toothed grooves 6. A limit rod 7 is vertically slidably connected inside the sliding sleeve 5. A compression spring 8 is provided between the limit rod 7 and the sliding sleeve 5. The limit rod 7 is lowered by the compression spring 8. The bottom of the positioning rod 7 is at a low position. The bottom end of the positioning rod 7 is fixed with a toothed block 9 by welding or bolts, so that the toothed block 9 is in a meshing state with the tooth groove 6. One side of the toothed block 9 is provided with a driving inclined surface 10 that cooperates with the tooth groove 6. Only one side of the toothed block 9 has an inclined driving inclined surface 10. The driving inclined surface 10 slides in contact with the side wall of the tooth groove 6. When the hydraulic lifting assembly drives the lifting platform 3 to rise, the slider 1 slides in the sliding sleeve 5, so that the tooth groove 6 contacts the driving inclined surface 10. Under the action of the inclined contact surface of the driving inclined surface 10, the toothed block 9 and the positioning rod 7 slide upward, compressing the compression spring 8. When the toothed block 9 passes the current tooth groove 6, it slides downward and resets under the action of the compression spring 8, and re-engages with the tooth groove on the rear side. 6. The toothed block 9 has a driving inclined surface 10 on only one side, which prevents the slider 1 from sliding in the opposite direction relative to the sliding sleeve 5. This prevents the lifting platform 3 from descending during the ascent, thus providing effective anti-fall protection for the lifting platform 3 during its ascent. Furthermore, the lifting platform 3 has a corresponding toothed groove 6 that engages with the toothed block 9 at any height, enabling real-time anti-fall protection for the lifting platform 3 and greatly improving the safety of the lifting machine. The sliding sleeve 5 is equipped with a lifting block that works with the toothed block 9. The lifting block is used to drive the toothed block 9 to rise when the lifting platform 3 descends, so that after the toothed block 9 separates from the toothed groove 6, the slider 1 can freely slide in the opposite direction relative to the sliding sleeve 5, allowing the lifting platform 3 to descend smoothly. This makes the use of the anti-fall protection structure more flexible.

[0020] Preferred, refer to Figure 3 and Figure 4 The top of the sliding sleeve 5 is fixed with a limiting sleeve 11 by welding or integral molding. The limiting rod 7 passes through the top of the sliding sleeve 5 and is slidably connected inside the limiting sleeve 11. The compression spring 8 is set between the top of the limiting sleeve 11 and the top of the limiting rod 7. The limiting sleeve 11 is set to guide and restrict the vertical sliding of the limiting rod 7, making the vertical sliding structure of the limiting rod 7 more stable. At the same time, it makes the setting position of the compression spring 8 more secure, and makes it more accurate when driving the limiting rod 7 to reverse reset sliding.

[0021] Preferably, the lifting block is an electromagnet 12, which is connected to the power supply of the elevator via a wire. When the electromagnet 12 is energized, it magnetically engages with the toothed block 9. With this structure, when the lifting platform 3 descends, the circuit containing the electromagnet 12 is connected, so that the electromagnet 12 generates an attractive force on the toothed block 9 after being energized. This causes the toothed block 9 and the limiting rod 7 to slide upward and separate from the tooth groove 6, making the control of the toothed block 9 more convenient and accurate. If the power structure fails during the descent of the lifting platform 3, the power supply to the electromagnet 12 can be cut off in time, so that the toothed block 9 automatically slides downward and resets under the action of the compression spring 8 to engage with the tooth groove 6, thereby effectively preventing the lifting platform 3 from continuing to fall. This also provides effective anti-fall protection for the descent process of the lifting platform 3, further improving the safety of the elevator.

[0022] Preferred, refer to Figure 5 The top of the fixed base frame 2 is provided with a groove 13, which is recessed downward from the top of the fixed base frame 2. The roller 4 is rotatably connected in the groove 13. The other side of the roller 4 is rotatably connected to a stop rod 14 that cooperates with the side wall of the groove 13 via a pin. One end of the stop rod 14 is rotatably connected to the bottom of the hydraulic lifting assembly via a pin, and the other end is a free end. With this structure, when the lifting platform 3 rises, the free end of the stop rod 14 is located in the groove 13 and moves laterally in the groove 13 as the lifting platform 3 rises. When the lifting platform 3 falls, the free end of the stop rod 14 moves in the opposite direction until it contacts the side wall of the groove 13, so that the lifting platform 3 can no longer fall after falling to this height. At this time, the position of the lifting platform 3 can be supported, so that the lifting platform 3 will not fall when performing maintenance or other operations, further improving the safety of the lifting machine.

[0023] Preferably, the stop bar 14 is provided with a locking hole 15, and the side of the hydraulic lifting assembly is fixed with a locking post 16 that cooperates with the locking hole 15 by welding or bolting. With this structure, when it is necessary to remove the restriction on the position of the lifting platform 3, the stop bar 14 is rotated so that the locking hole 15 on it engages with the locking post 16 on the side of the hydraulic lifting assembly, thereby releasing the restriction of the stop bar 14 on the descent of the hydraulic lifting assembly, and further improving the flexibility and convenience of the fall protection structure.

[0024] Preferably, the hydraulic lifting assembly includes two symmetrically arranged first connecting rods 17 and 18. The first connecting rod 17 and the second connecting rod 18 are rotatably connected at their midpoints via a pin. A hydraulic rod 19 is provided between the first connecting rod 17 and the second connecting rod 18. Specifically, the hydraulic rod 19 can be any existing hydraulic cylinder. Its main body and movable end are rotatably connected to either the first connecting rod 17 or the second connecting rod 18 via a pin, so that when it extends or retracts, it drives the scissor structure composed of the first connecting rod 17 and the second connecting rod 18 to perform scissor rotation, thereby achieving the lifting drive of the lifting platform 3. The top of the first connecting rod 17 is rotatably connected to the lifting platform 3 via a pin. The rollers... 4. The bottom of the first connecting rod 17 is rotatably connected by a bearing. The bottom of the second connecting rod 18 is rotatably connected to the fixed base frame 2 by a pin. The top of the second connecting rod 18 is rotatably connected to a guide column 20 by a pin. The bottom of the lifting platform 3 is provided with a guide groove 21. Specifically, a fixed plate is fixed to the bottom of the lifting platform 3 by welding or bolts. The guide groove 21 is set on the fixed plate. The guide column 20 is slidably connected in the guide groove 21. With this structure, when the hydraulic rod 19 extends or retracts, the roller 4 at the bottom of the first connecting rod 17 rolls along the fixed base frame 2, and the guide column 20 at the top of the second connecting rod 18 slides in the guide groove 21, making the operation of the entire scissor structure smoother.

[0025] Preferably, a first connecting column 22 is fixed between the two first connecting rods 17 by welding or bolts, and a second connecting column 23 is fixed between the two second connecting rods 18 by welding or bolts. The hydraulic rod 19 is disposed between the first connecting column 22 and the second connecting column 23. The roller 4 and the slider 1 are both disposed on the first connecting column 22. Specifically, both are rotatably connected to the first connecting column 22 through bearings. This structure connects the first connecting rods 17 and the second connecting rods 18 on both sides, making the operation of the scissor structure on both sides more synchronized and improving the accuracy and stability of the lifting movement of the lifting platform 3.

[0026] Working Principle: The structure of this utility model features symmetrically arranged rollers 4 on one side of the hydraulic lifting assembly. The rollers 4 are rotatably connected to the fixed base frame 2. A slider 1 is located on one side of the rollers 4. A sliding sleeve 5 is located on the fixed base frame 2. The slider 1 is slidably connected inside the sliding sleeve 5. The slider 1 has multiple toothed grooves 6. A limit rod 7 is vertically slidably connected inside the sliding sleeve 5. A compression spring 8 is located between the limit rod 7 and the sliding sleeve 5. A toothed block 9 is located at the bottom end of the limit rod 7. A driving inclined surface 10, which cooperates with the toothed grooves 6, is located on one side of the toothed block 9. When the hydraulic lifting assembly drives the lifting platform 3 to rise, the rollers 4 on one side of the platform roll along the fixed base frame 2, causing the slider 1 to slide within the sliding sleeve 5. This causes the toothed grooves 6 on the slider 1 to contact the driving inclined surface 10 on the side of the toothed block 9, driving the toothed block 9 and the limit rod 7 to slide upwards, compressing the compression spring 8. After the toothed block 9 passes the toothed grooves 6, it is compressed further. Under the action of spring 8, the slide block 9 slides downward and resets, re-engaging with the toothed groove 6 on the rear side. Since only one side of the toothed block 9 has a driving inclined surface 10, the slider 1 cannot slide in the opposite direction relative to the sliding sleeve 5. Therefore, when the hydraulic lifting assembly experiences a power failure and the lifting platform 3 falls, the cooperation between the toothed block 9 and the toothed groove 6 supports the falling of the lifting platform 3, thereby greatly improving the safety of the lifting. Moreover, the lifting platform 3 can be protected against falling when it rises to any height, realizing real-time protection of the lifting platform 3 and effectively ensuring the safety of the lifting machine. A lifting block is provided in the sliding sleeve 5 to cooperate with the toothed block 9. The lifting block can drive the toothed block 9 to rise when the lifting machine descends, so that the toothed block 9 separates from the toothed groove 6 on the slider 1 after rising. At this time, the slider 1 can smoothly slide in the opposite direction relative to the sliding sleeve 5, allowing the lifting platform 3 to descend smoothly. The structure is simple and the use of the fall protection is more flexible.

Claims

1. A safety protection structure for a hydraulic lift, comprising a slider (1) mounted on a body, the body comprising a fixed base frame (2) and a lifting platform (3), wherein a hydraulic lifting assembly is provided between the fixed base frame (2) and the lifting platform (3), characterized in that: The hydraulic lifting assembly has rollers (4) symmetrically arranged on one side of its bottom. The rollers (4) are in rolling contact with the fixed base frame (2). The slider (1) is arranged on one side of the rollers (4). The fixed base frame (2) is provided with a sliding sleeve (5). The slider (1) is slidably connected inside the sliding sleeve (5). The slider (1) is provided with multiple toothed grooves (6). The sliding sleeve (5) is vertically connected with a limit rod (7). A compression spring (8) is provided between the limit rod (7) and the sliding sleeve (5). The bottom end of the limit rod (7) is provided with a toothed block (9). One side of the toothed block (9) is provided with a driving inclined surface (10) that cooperates with the toothed grooves (6). The sliding sleeve (5) is provided with a lifting block that cooperates with the toothed block (9).

2. The safety protection structure for a hydraulic lift according to claim 1, characterized in that: The top of the sliding sleeve (5) is provided with a limiting sleeve (11), and the limiting rod (7) passes through the top of the sliding sleeve (5) and is slidably connected in the limiting sleeve (11). The compression spring (8) is set between the top of the limiting sleeve (11) and the top of the limiting rod (7).

3. The safety protection structure for a hydraulic lift according to claim 1, characterized in that: The lifting block is an electromagnet (12), which magnetically attracts the tooth block (9) when it is energized.

4. The safety protection structure for a hydraulic lift according to claim 1, characterized in that: The top of the fixed base frame (2) is provided with a groove (13), and the roller (4) is rotatably connected in the groove (13). The other side of the roller (4) is rotatably connected with a stop bar (14) that cooperates with the side wall of the groove (13).

5. The safety protection structure for a hydraulic lift according to claim 4, characterized in that: The stop bar (14) is provided with a locking hole (15), and the side of the hydraulic lifting assembly is provided with a locking post (16) that works in conjunction with the locking hole (15).

6. The safety protection structure for a hydraulic lift according to claim 1, characterized in that: The hydraulic lifting assembly includes a first connecting rod (17) and a second connecting rod (18) arranged symmetrically. The first connecting rod (17) and the second connecting rod (18) are rotatably connected. A hydraulic rod (19) is provided between the first connecting rod (17) and the second connecting rod (18). The top of the first connecting rod (17) is rotatably connected to the lifting platform (3). The roller (4) is rotatably connected to the bottom of the first connecting rod (17). The bottom of the second connecting rod (18) is rotatably connected to the fixed base frame (2). The top of the second connecting rod (18) is provided with a guide column (20). The bottom of the lifting platform (3) is provided with a guide groove (21). The guide column (20) is slidably connected in the guide groove (21).

7. The safety protection structure for a hydraulic lift according to claim 6, characterized in that: A first connecting post (22) is provided between the two first connecting rods (17), and a second connecting post (23) is provided between the two second connecting rods (18). The hydraulic rod (19) is located between the first connecting post (22) and the second connecting post (23). The roller (4) and the slider (1) are both located on the first connecting post (22).

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