Hydraulic lifting platform

Abstract

The utility model relates to the technical field of hoisting machinery, in particular to a hydraulic lifting platform, the two ends of a driving oil cylinder are connected with a first shear shank and a second shear shank in a hinged structure mode to drive an upper frame to ascend and descend, a locking device is arranged at the position of the driving oil cylinder and comprises a first sleeve, and the driving oil cylinder is sleeved with the first sleeve; one end of the first sleeve is connected with the first shear shank in a hinged structure mode, the first sleeve is sleeved with a second sleeve, the second sleeve is connected with the first sleeve in a sliding structure mode, one end of the second sleeve is connected with the second shear shank in a hinged structure mode, and the two opposite outer vertical walls of the second sleeve are provided with sawtooth plates in a fixed structure mode respectively. The sawtooth frame is arranged on the upper portion of the sawtooth plate, pressure borne by the sawtooth frame is transmitted to the first shear shank and the second shear shank, the driving oil cylinder is prevented from being directly damaged by shear force, the stability of the structure is improved, and the safety performance of the lifting platform is improved.

Description

Technical field:

[0001] The present application relates to the technical field of lifting machinery, and in particular to a hydraulic lifting platform. Background technology:

[0002] Hydraulic lifting platform is a multifunctional lifting and loading and unloading mechanical equipment. Hydraulic lifting platform is divided into: four-wheel mobile lifting platform, two-wheel traction lifting platform, car modified lifting platform, hand-push lifting platform, hand-cranked lifting platform, AC / DC dual-purpose lifting platform, battery vehicle-mounted lifting platform, lifting height ranging from 1 meter to 30 meters.

[0003] The Chinese invention patent application with application number 201711356283.3 - A lifting platform, including a working platform, a supporting mechanism, a hydraulic mechanism, a base, and a walking mechanism. The walking mechanism is installed below the base. The supporting mechanism adopts a scissor-type mechanical structure, installed above the base, and one end is hinged to the fixed hinge support, and the other end is hinged to the linear guide slider. The working platform is installed above the supporting mechanism. The hydraulic mechanism is hinged to the fixed hinge support at one end, and the other end is hinged to the connecting rod shaft of the supporting mechanism. Through the telescopic movement of the hydraulic cylinder, the tension and compression of the supporting mechanism are driven, thereby realizing the lifting and lowering movement of the working platform. The hydraulic mechanism includes a hydraulic cylinder, an electromagnet, a lever, and a locking device. When rising, the locking device relies on its own weight, and the teeth of the locking device naturally descend to achieve locking. When the descending function is to be realized, the electromagnet is energized through circuit control, and the locking device is lifted through the lever action, and the teeth of the locking device are separated from the teeth on the hydraulic cylinder, thereby releasing the locking.

[0004] This patent uses a locking device to lock and fix the lifting platform, but the locking device is not properly stressed. When the driving cylinder fails and causes the working platform to descend, the locking device transmits the upper pressure to the hydraulic cylinder through the teeth. The hydraulic cylinder is not a side-loaded component and is easily broken by shear force, and cannot achieve the purpose of locking. There is a serious safety hazard. Utility model content:

[0005] In order to solve the above technical problems, the utility model provides a hydraulic lifting platform, which solves the technical problem that the locking device transmits the upper pressure to the hydraulic cylinder through the teeth, causing the hydraulic cylinder to break, which poses a serious safety hazard. In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0006] A hydraulic lifting platform comprises a bottom frame, an upper frame, a driving oil cylinder, a first scissor frame and a second scissor frame, wherein the middle of the first scissor frame and the middle of the second scissor frame are connected in an articulated structure, the left side of the first scissor frame and the left side of the second scissor frame are connected to the upper frame and the bottom frame in an articulated structure, the right side of the first scissor frame and the right side of the second scissor frame are respectively connected to the upper frame and the bottom frame in a sliding structure, the two ends of the driving oil cylinder are respectively connected to the first scissor frame and the second scissor frame in an articulated structure to drive the upper frame to rise and fall, and a locking device is provided at the driving oil cylinder, and the locking device comprises:

[0007] A first sleeve, the first sleeve is sleeved outside the driving cylinder, and one end of the first sleeve is connected to the first scissor frame in a hinged structure;

[0008] A second sleeve, the second sleeve is sleeved outside the first sleeve and connected thereto in a sliding structure, and one end of the second sleeve is connected to the second scissor frame in a hinged structure;

[0009] The sawtooth plates are respectively arranged on two opposite outer walls of the second sleeve in a fixed structure manner;

[0010] A sawtooth frame, the lower end surface of which is provided with teeth matching with the sawtooth plate, and the sawtooth frame is connected to the first scissors frame in an articulated structure;

[0011] A driving member is connected to the sawtooth frame to lift the sawtooth frame and release the lock with the sawtooth plate.

[0012] Furthermore, the first scissor frame includes two scissor arms A, a connecting frame A is fixedly arranged between the middle parts of the two scissor arms A, the connecting frame A is provided with a mounting seat A in a fixed structure manner, and the mounting seat A is provided with a pin shaft A in a rotating structure manner;

[0013] The first sleeve, the sawtooth frame and the upper part of the driving oil cylinder are all connected to the mounting seat A through the pin shaft A.

[0014] Furthermore, the second scissor frame includes two scissor arms B, a connecting frame B is fixedly arranged between the lower parts of the two scissor arms B, the connecting frame B is provided with a mounting seat B in a fixed structure manner, and the mounting seat B is provided with a pin shaft B in a rotating structure manner;

[0015] The sawtooth plate and the lower part of the driving oil cylinder are connected to the mounting seat B through a pin shaft B.

[0016] Furthermore, the driving member is a hydraulic cylinder, which is connected to the sawtooth frame in a fixed structure, and the output shaft of the hydraulic cylinder passes through the sawtooth frame and is provided with a bull's eye wheel universal ball.

[0017] Furthermore, the upper end surface of the base frame and the lower end surface of the upper frame are both provided with linear slide rails connected to the first scissors frame and the second scissors frame.

[0018] The beneficial effect of the utility model is that the first sleeve and the second sleeve are arranged outside the driving cylinder, so that the pressure exerted on the serration frame is transmitted to the first scissors frame and the second scissors frame, thereby avoiding the driving cylinder from being directly damaged by the shear force, improving the stability of the structure, and achieving the purpose of self-locking, thereby greatly improving the safety performance of the lifting platform.

[0019] By providing a bull's eye wheel universal ball, hard friction between the output shaft of the hydraulic cylinder and the outer wall of the second sleeve can be avoided, the generation of noise and damage to the second sleeve can be reduced, and the smoothness of operation can be improved. Description of the drawings:

[0020] Figure 1 It is a three-dimensional structural schematic diagram of the utility model.

[0021] Figure 2 It is a schematic diagram of the cross-sectional structure of the locking device of the utility model.

[0022] In the figure:

[0023] 1. Base frame, 2. Upper frame, 3. Driving cylinder, 41. Scissor arm A, 42. Connecting frame A, 43. Mounting seat A, 44. Pin A, 51. Scissor arm B, 52. Connecting frame B, 53. Mounting seat B, 54. Pin B, 6. First sleeve, 7. Second sleeve, 8. Sawtooth plate, 9. Sawtooth frame, 10. Driving part, 11. Bull's eye wheel universal ball, 12. Linear slide rail. Specific implementation method:

[0024] In order to make the purpose, technical scheme and advantages of the implementation of the utility model clearer, the utility model will now be further described in detail with reference to the accompanying drawings and the following examples so that the public can better understand the implementation method of the utility model. The specific implementation scheme of the utility model is as follows:

[0025] A hydraulic lifting platform comprises a base frame 1, an upper frame 2, a driving cylinder 3, a first scissor frame and a second scissor frame. The middle of the first scissor frame and the middle of the second scissor frame are connected in an articulated structure manner. The left side of the first scissor frame and the left side of the second scissor frame are both connected to the upper frame 2 and the base frame 1 in an articulated structure manner. The right side of the first scissor frame and the right side of the second scissor frame are respectively connected to the upper frame 2 and the base frame 1 in a sliding structure manner. Both ends of the driving cylinder 3 are respectively connected to the first scissor frame and the second scissor frame in an articulated structure manner to drive the upper frame 2 to rise and fall. A locking device is provided at the driving cylinder 3. The locking device comprises a first sleeve 6. The first sleeve 6 is sleeved on the outside of the driving cylinder 3, and one end of the first sleeve 6 is connected to the first scissor frame in an articulated structure manner. A second sleeve 7 is sleeved on the outside of the first sleeve 6. The second sleeve 7 It is connected to the first sleeve 6 in a sliding structure manner, one end of the second sleeve 7 is connected to the second scissors frame in a hinged structure manner, and the two opposite outer walls of the second sleeve 7 are respectively provided with serrated plates 8 in a fixed structure manner, a serrated frame 9 is provided on the upper part of the serrated plate 8, and the lower end surface of the serrated frame 9 is provided with teeth matching the serrated plate 8, the serrated frame 9 is connected to the first scissors frame in a hinged structure manner, and the serrated frame 9 is provided with a driving member 10 to lift the serrated frame 9 and release the lock with the serrated plate 8; the first sleeve 6 and the second sleeve 7 are arranged on the outside of the driving cylinder 3, and the pressure on the serrated frame 9 is transmitted to the first scissors frame and the second scissors frame, so as to avoid the driving cylinder 3 being directly damaged by the shear force, thereby improving the stability of the structure and achieving the purpose of self-locking, thereby greatly improving the safety performance of the lifting platform.

[0026] Specifically, the first scissors frame includes two scissor arms A41, a connecting frame A42 is fixedly arranged between the middle parts of the two scissor arms A41, the connecting frame A42 is provided with a mounting seat A43 in a fixed structure manner, and the mounting seat A43 is provided with a pin shaft A44 in a rotating structure manner; the first sleeve 6, the serrated frame 9 and the upper part of the driving cylinder 3 are connected to the mounting seat A43 through the pin shaft A44; the second scissor frame includes two scissor arms B51, a connecting frame B52 is fixedly arranged between the lower parts of the two scissor arms B51, the connecting frame B52 is provided with a mounting seat B53 in a fixed structure manner, and the mounting seat B53 is provided with a pin shaft B54 in a rotating structure manner; the serrated plate 8 and the lower part of the driving cylinder 3 are connected to the mounting seat B53 through the pin shaft B54. Through this design, the driving cylinder 3 is wrapped in the first sleeve 6 and the second sleeve 7, thereby reducing the possibility of damage to the driving cylinder 3 due to collision and increasing the service life of the driving cylinder 3.

[0027] It should be noted that the driving member 10 is a hydraulic cylinder, which is connected to the sawtooth frame 9 in a fixed structure, and the output shaft of the hydraulic cylinder passes through the sawtooth frame 9 and is provided with a bull's eye wheel universal ball 11; by providing the bull's eye wheel universal ball 11, hard friction between the output shaft of the hydraulic cylinder 10 and the outer wall of the second sleeve 7 is avoided, the generation of noise and damage to the second sleeve are reduced, and the smoothness of operation is improved.

[0028] It should be explained that the upper end surface of the bottom frame 1 and the lower end surface of the upper frame 2 are both provided with linear slide rails 12 connected to the first scissors frame and the second scissors frame to improve the stability of the lifting platform.

[0029] The working principle and working process of the utility model are as follows:

[0030] After placing the goods on the upper end surface of the upper rack 2, the driving cylinder 3 is started, the output shaft of the driving cylinder 3 is extended, and then the first sleeve 6 is driven to extend in the second sleeve 7; at the same time, the sawtooth frame 9 naturally descends by its own weight. If the driving cylinder 3 loses pressure, the sawtooth frame 9 is locked by the cooperation of the teeth of the sawtooth plate 8, and the pressure is transmitted to the first scissors frame and the second scissors frame through the first sleeve 6 and the second sleeve 7.

[0031] In the description of the present invention, it should be understood that the terms "center", "upper", "lower", "left", "right", "front", "back", "lower left", "upper right", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. Although the present invention has been described according to a limited number of embodiments, those skilled in the art, with the benefit of the above description, should understand that other embodiments can be conceived within the scope of the present invention described thereby.

Claims

1. A hydraulic lifting platform, comprising a base frame (1), an upper frame (2), a driving cylinder (3), a first scissor frame and a second scissor frame, wherein the middle of the first scissor frame and the middle of the second scissor frame are connected in an articulated structure, the left side of the first scissor frame and the left side of the second scissor frame are both connected to the upper frame (2) and the base frame (1) in an articulated structure, the right side of the first scissor frame and the right side of the second scissor frame are respectively connected to the upper frame (2) and the base frame (1) in a sliding structure, the two ends of the driving cylinder (3) are respectively connected to the first scissor frame and the second scissor frame in an articulated structure to drive the upper frame (2) to rise and fall, and a locking device is provided at the driving cylinder (3), characterized in that: The locking device includes: A first sleeve (6), the first sleeve (6) is sleeved on the outside of the driving oil cylinder (3), and one end of the first sleeve (6) is connected to the first scissor frame in an articulated structure; A second sleeve (7), the second sleeve (7) is sleeved outside the first sleeve (6) and connected thereto in a sliding structure manner, and one end of the second sleeve (7) is connected to the second scissor frame in a hinged structure manner; A sawtooth plate (8), the sawtooth plate (8) is respectively arranged on two opposite outer walls of the second sleeve (7) in a fixed structure manner; A sawtooth frame (9), the lower end surface of which is provided with teeth matching the sawtooth plate (8), and the sawtooth frame (9) is connected to the first scissors frame in an articulated structure; A driving member (10) is connected to the sawtooth frame (9) to lift the sawtooth frame (9) to release the lock with the sawtooth plate (8).

2. A hydraulic lifting platform according to claim 1, characterized in that: The first scissor frame comprises two scissor arms A (41), a connecting frame A (42) is fixedly arranged between the middle parts of the two scissor arms A (41), the connecting frame A (42) is provided with a mounting seat A (43) in a fixed structure manner, and the mounting seat A (43) is provided with a pin shaft A (44) in a rotating structure manner; The first sleeve (6), the sawtooth frame (9) and the upper part of the driving oil cylinder (3) are all connected to the mounting seat A (43) through a pin shaft A (44).

3. A hydraulic lifting platform according to claim 2, characterized in that: The second scissor frame comprises two scissor arms B (51), a connecting frame B (52) is fixedly arranged between the lower parts of the two scissor arms B (51), the connecting frame B (52) is provided with a mounting seat B (53) in a fixed structure manner, and the mounting seat B (53) is provided with a pin shaft B (54) in a rotating structure manner; The sawtooth plate (8) and the lower part of the driving oil cylinder (3) are connected to the mounting seat B (53) through a pin shaft B (54).

4. The hydraulic lifting platform according to claim 1, characterized in that: The driving member (10) is a hydraulic oil cylinder, which is connected to the sawtooth frame (9) in a fixed structure mode, and the output shaft of the hydraulic oil cylinder passes through the sawtooth frame (9) and is provided with a bull's eye wheel universal ball (11).

5. The hydraulic lifting platform according to claim 1, characterized in that: The upper end surface of the bottom frame (1) and the lower end surface of the upper frame (2) are both provided with linear slide rails (12) connected to the first scissor frame and the second scissor frame.

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