Hydraulic lifting platform with locking mechanism

Abstract

The utility model relates to the field of hydraulic lifting platforms, and discloses a hydraulic lifting platform with a locking mechanism, a base is internally provided with the locking mechanism, the locking mechanism comprises two locking plates fixed at the bottom end in the base, the locking plates are provided with a plurality of locking grooves distributed at equal intervals, and the locking grooves are connected with the locking plates. A lifting plate is arranged above the moving shaft in an up-down lifting mode, hanging screws are symmetrically arranged on the front side and the rear side of the lifting plate, locking blocks are installed at the bottom ends of the hanging screws, and the locking blocks are arranged in locking grooves in an up-down sliding mode. According to the lifting platform, the movable shaft is installed on the lifting platform, the hanging screw rod is installed on the movable shaft in a matched mode, the locking block is arranged at the lower end of the hanging screw rod, and in the lifting process of the lifting platform, the locking block can move along the locking plate and is arranged in the locking groove, so that the locking block can only move in one direction, the lifting platform cannot descend at the moment, and stability is improved; and falling of the lifting platform caused by hydraulic cylinder faults is prevented.

Description

Technical Field

[0001] The utility model relates to the field of hydraulic lifting platforms, in particular to a hydraulic lifting platform with a locking mechanism. Background Technique

[0002] A hydraulic lifting platform is a multi-functional lifting and loading and unloading mechanical equipment. When the piston of the hydraulic cylinder moves downward (i.e., the heavy object descends), the hydraulic oil enters the upper end of the hydraulic cylinder through an explosion-proof electromagnetic reversing valve, and the oil returning from the lower end of the hydraulic cylinder returns to the fuel tank through a balance valve, a hydraulic control one-way valve, a throttle valve, and an explosion-proof electromagnetic reversing valve. To make the heavy object descend smoothly and the braking safe and reliable, a balance valve is set on the oil return path to balance the loop and maintain the pressure, so that the descending speed is not affected by the heavy object, and the flow rate is regulated by the throttle valve to control the lifting speed and realize the lifting of the platform.

[0003] In the hydraulic lifting platform with this structure, the thrust of the hydraulic cylinder is used for support, and the structure of the support thrust of the hydraulic cylinder is relatively single. When the oil circuit of the hydraulic cylinder is damaged, the oil in the oil cylinder may flow by itself, and the internal pressure cannot be maintained. At this time, the lifting platform may fall under its own gravity, which is likely to cause potential safety hazards. Therefore, we have set up a hydraulic lifting platform with a locking mechanism. Content of the Utility Model

[0004] To solve the technical problem that when the oil circuit of the hydraulic cylinder is damaged, the oil in the oil cylinder may flow by itself, and the internal pressure cannot be maintained, and at this time the lifting platform may fall under its own gravity, the utility model provides a hydraulic lifting platform with a locking mechanism.

[0005] The utility model is realized by adopting the following technical solutions: A hydraulic lifting platform with a locking mechanism includes a base. Two groups of scissor lifters are symmetrically arranged on the front and rear sides of the base. A lifting platform is installed above the two groups of scissor lifters. The right side below the scissor lifter is rotationally connected with a moving shaft. Two hydraulic cylinders are arranged at the left end of the base. The push rod of the hydraulic cylinder is rotationally connected with the moving shaft. A locking mechanism is arranged inside the base;

[0006] The locking mechanism includes two locking plates fixed at the bottom end inside the base. The two locking plates are symmetrically arranged, and a plurality of equally spaced locking grooves are formed on the locking plates. An elevating plate is arranged above the moving shaft in a vertically lifting manner. Hanging screw rods are symmetrically arranged on the front and rear sides of the elevating plate. A locking block is installed at the bottom end of the hanging screw rod. The locking block slides up and down in the locking groove.

[0007] As a further improvement of the above solution, the left side below and the left side above the scissor lifter are respectively rotationally connected with the base and the lifting platform through rotating shafts. The right side above the scissor lifter is slidably connected with the lower part of the lifting platform through a shaft pin and a roller, which is convenient for the up and down movement of the lifting platform.

[0008] As a further improvement of the above solution, guide grooves are provided on both the front and rear inner walls of the base. The moving shaft includes a first moving rod and a second moving rod. The first moving rod and the second moving rod are connected by a connecting plate, and rollers are provided at both the front and rear ends of the first moving rod and the second moving rod. The rollers are placed in the guide grooves in a rolling manner. The push rod of the hydraulic cylinder is rotatably connected to the first moving rod. There is a certain distance between the first moving rod and the second moving rod, which facilitates the installation of the locking mechanism.

[0009] As a further improvement of the above solution, guide holes are provided at both the front and rear ends above the outer surface of the first moving rod and the second moving rod. Four guide rods distributed in a rectangular structure are provided below the lifting plate. The guide rods slide up and down in the guide holes. The lifting plate is lapped above the outer surface of the first moving rod and the second moving rod. It can move upward as needed, thereby releasing the locking of the hydraulic lifting platform and enabling it to reset. The setting of the guide rods facilitates the up and down movement of the lifting plate and improves the stability.

[0010] As a further improvement of the above solution, two groups of round holes are vertically penetrated through the lifting plate. Two hanging screws respectively pass through the two groups of round holes and are placed below it. A return spring is sleeved on the hanging screws. The upper and lower ends of the return spring abut between the lifting plate and the locking block. A nut is threadedly connected above the hanging screw, which can quickly install and fix the hanging screw, and it can move up and down, so that the locking block can move up and down, facilitating the normal lifting of the lifting platform.

[0011] As a further improvement of the above solution, a fixing plate is installed below the first moving rod and the second moving rod by screws. An electric push rod is installed below the fixing plate. The push rod of the electric push rod passes through the fixing plate and is placed above it. An extension rod is provided above the electric push rod. The top end of the extension rod is connected to the lower part of the lifting plate. The extension rod makes the push rod part of the electric push rod have an extended design, which facilitates the upward movement of the lifting plate. At this time, the locking block can move upward accordingly and disengage from the connection with the locking groove.

[0012] As a further improvement of the above solution, the ends of the locking groove and the locking block far from the push rod of the hydraulic cylinder are both designed as vertical surfaces, and the ends of the locking groove and the locking block close to the push rod of the hydraulic cylinder are both provided with inclined surfaces to form sliding inclined surfaces. When the push rod of the hydraulic cylinder expands and contracts, the entire moving shaft moves to the left. At this time, the inclined surface of the locking block can slide along the inclined surface of the locking groove, which facilitates the normal lifting of the lifting platform.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] 1. In the utility model, a locking plate is arranged inside the base, a locking groove is formed on the locking plate, and a hanging screw rod installed on the moving shaft is matched. A locking block is arranged at the lower end of the hanging screw rod. During the lifting process of the lifting platform, the locking block can move along the locking plate and be placed in the locking groove, so that it can only move in one direction. At this time, the lifting platform cannot descend, which improves the stability and prevents the lifting platform from falling due to the failure of the hydraulic cylinder.

[0015] 2. By arranging an electric push rod below the moving shaft, the upper part of the electric push rod is connected with the lifting plate, and the hanging screw rod is suspended and installed on the lifting plate. The lifting plate can move up and down, so that the locking block is separated from the connection with the locking plate and the locking groove, which is convenient for the contraction of the lifting platform. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 FIG. is a schematic diagram of the overall structure of a hydraulic lifting platform with a locking mechanism provided by the utility model;

[0017] Figure 2 is Figure 1 a schematic diagram of the structure of the locking mechanism in

[0018] Figure 3 is Figure 2 a schematic diagram of the structure without the lifting plate in

[0019] Figure 4 is Figure 1 a sectional schematic diagram of

[0020] Figure 5 is Figure 4 an enlarged schematic diagram of part A in

[0021] MAIN SYMBOL DESCRIPTION:

[0022] 1. Base; 11. Guide groove; 2. Scissor lift; 3. Hydraulic cylinder; 4. Lifting platform; 5. Locking mechanism; 51. Locking plate; 511. Locking groove; 512. Sliding inclined plane; 52. Lifting plate; 521. Guide rod; 53. Fixed plate; 54. Electric push rod; 55. Locking block; 56. Hanging screw rod; 57. Return spring; 6. Moving shaft; 61. First moving rod; 62. Second moving rod. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] Next, in combination with the drawings and specific embodiments, the present utility model will be further described. It should be noted that on the premise of no conflict, the following described embodiments or technical features can be arbitrarily combined to form new embodiments.

[0024] Embodiment:

[0025] Please combine Figures 1-5, A hydraulic lifting platform with a locking mechanism in this embodiment includes a base 1. Two groups of scissor lifting frames 2 are symmetrically arranged on the front and rear sides of the base 1. An elevating platform 4 is installed above the two groups of scissor lifting frames 2. The lower right side of the scissor lifting frame 2 is rotationally connected to a moving shaft 6. Two hydraulic cylinders 3 are arranged at the left end of the base 1. The push rod of the hydraulic cylinder 3 is rotationally connected to the moving shaft 6. A locking mechanism 5 is arranged inside the base 1;

[0026] The locking mechanism 5 includes two locking plates 51 fixed to the inner bottom end of the base 1. The two locking plates 51 are symmetrically arranged, and a plurality of equally spaced locking grooves 511 are formed on the locking plates 51. An elevating plate 52 is arranged in a vertically moving manner above the moving shaft 6. Hanging screw rods 56 are symmetrically arranged on the front and rear sides of the elevating plate 52. A locking block 55 is installed at the bottom end of the hanging screw rod 56. The locking block 55 slides up and down in the locking groove 511.

[0027] The left side of the lower part and the left side of the upper part of the scissor lifting frame 2 are respectively rotationally connected to the base 1 and the elevating platform 4 through a rotating shaft. The upper right side of the scissor lifting frame 2 is slidably connected to the lower part of the elevating platform 4 through a pin and a roller, facilitating the up and down movement of the elevating platform 4.

[0028] Guide grooves 11 are arranged on the front and rear inner walls of the base 1. The moving shaft 6 includes a moving rod one 61 and a moving rod two 62. The moving rod one 61 and the moving rod two 62 are connected through a connecting plate, and rollers are arranged at the front and rear ends of the moving rod one 61 and the moving rod two 62. The rollers roll in the guide grooves 11. The push rod of the hydraulic cylinder 3 is rotationally connected to the moving rod one 61. There is a certain distance between the moving rod one 61 and the moving rod two 62, facilitating the installation of the locking mechanism 5.

[0029] Guide holes are formed at the front and rear ends above the outer surface of the moving rod one 61 and the moving rod two 62. Four guiding rods 521 distributed in a rectangular structure are arranged below the elevating plate 52. The guiding rods 521 slide up and down in the guide holes. The elevating plate 52 is lapped on the outer surface above the moving rod one 61 and the moving rod two 62. It can move upward as needed to release the locking of the hydraulic elevating platform 4, enabling it to reset. The arrangement of the guiding rods 521 facilitates the up and down movement of the elevating plate 52 and improves stability.

[0030] Two groups of round holes are vertically penetrated through the elevating plate 52. The two hanging screw rods 56 respectively pass through the two groups of round holes and are located below them. A return spring 57 is sleeved on the hanging screw rod 56. The upper and lower ends of the return spring 57 abut between the elevating plate 52 and the locking block 55. A nut is threadedly connected above the hanging screw rod 56, which can quickly install and fix the hanging screw rod 56, and it can move up and down, enabling the locking block 55 to move up and down, facilitating the normal lifting of the elevating platform 4.

[0031] A fixing plate 53 is installed below the first moving rod 61 and the second moving rod 62 by screws. An electric push rod 54 is installed below the fixing plate 53. The push rod of the electric push rod 54 passes through the fixing plate 53 and is located above it. An extension rod is arranged above the electric push rod 54. The top end of the extension rod is connected to the lower part of the lifting plate 52. The extension rod makes the push rod part of the electric push rod 54 have an extended design, thus facilitating the upward movement of the lifting plate 52. At this time, the locking block 55 can move upward accordingly and disengage from the connection with the locking groove 511.

[0032] Both ends of the locking groove 511 and the locking block 55 away from the push rod of the hydraulic cylinder 3 are designed as vertical surfaces, and both ends of the locking groove 511 and the locking block 55 close to the push rod of the hydraulic cylinder 3 are provided with inclined surfaces to form sliding inclined surfaces 512. When the push rod of the hydraulic cylinder 3 expands and contracts, the entire moving shaft 6 moves to the left. At this time, the inclined surface of the locking block 55 can slide along the inclined surface of the locking groove 511, thus facilitating the normal elevation of the lifting platform 4.

[0033] The implementation principle of a hydraulic lifting platform with a locking mechanism in the embodiment of the present application is as follows: when the lifting platform 4 is lifted, the push rods of the two hydraulic cylinders 3 contract, thereby causing the moving shaft 6 and the right end of the scissor lifting frame 2 to move to the left. At this time, the scissor lifting frame 2 expands as a whole, and the entire lifting platform 4 will rise;

[0034] During the process of the moving shaft 6 moving to the left, since the left side of the locking plate 51 is provided with an inclined surface and the locking plate 51 can also slide up and down, the left side of the locking groove 511 is also provided with an inclined surface. The locking plate 51 will slide and expand along the inclined surface of the locking groove 511 and disengage from the locking groove 511, and then be inserted into the locking groove 511 again under the action of the return spring 57. This makes the entire lifting platform 4 only able to be lifted. During its descending process, due to being restricted by the locking groove 511 and the locking block 55, it cannot move to the right, thereby being able to lock and limit the hydraulic lifting platform;

[0035] When it is necessary to make the lifting platform 4 contract downward, the electric push rod 54 makes the entire lifting plate 52 move upward. At this time, the locking plate 51 will also move upward together. The locking plate 51 will disengage from the locking groove 511, and there is a certain distance between the two, thus facilitating the contraction of the lifting platform 4;

[0036] By arranging a locking plate 51 inside the base 1, a locking groove 511 is formed on the locking plate 51, and a hanging screw rod 56 is installed on the moving shaft 6 in cooperation. A locking block 55 is arranged at the lower end of the hanging screw rod 56. During the lifting process of the lifting platform 4, the locking block 55 can move along the locking plate 51 and be placed in the locking groove 511, thereby enabling it to only move in one direction. At this time, the lifting platform 4 cannot descend, improving the stability and preventing the lifting platform 4 from falling due to the failure of the hydraulic cylinder 3;

[0037] By arranging an electric push rod 54 below the moving shaft 6, connecting the upper part of the electric push rod 54 to the lifting plate 52, and suspending and installing the hanging screw rod 56 on the lifting plate 52, the lifting plate 52 can move up and down, so that the locking block 55 is disengaged from the connection with the locking plate 51 and the locking groove 511, facilitating the contraction of the lifting platform 4.

[0038] The above-mentioned embodiments are only the preferred embodiments of the present invention, and the scope of protection of the present invention cannot be limited thereby. Any non-substantive changes and substitutions made by those skilled in the art on the basis of the present invention belong to the scope of protection required by the present invention.

Claims

1. A hydraulic lifting platform with a locking mechanism, comprising a base (1), characterized in that, On the front and rear sides of the base (1), two groups of scissor lifts (2) are symmetrically arranged. Above the two groups of scissor lifts (2), a lifting table (4) is installed. The lower right side of the scissor lift (2) is rotatably connected to a moving shaft (6). At the left end of the base (1), two hydraulic cylinders (3) are provided. The push rod of the hydraulic cylinder (3) is rotatably connected to the moving shaft (6). A locking mechanism (5) is arranged inside the base (1). The locking mechanism (5) includes two locking plates (51) fixed to the inner bottom end of the base (1). The two locking plates (51) are symmetrically arranged, and a plurality of equally spaced locking grooves (511) are formed on the locking plates (51). Above the moving shaft (6), a lifting plate (52) is arranged in a vertically movable manner. On the front and rear sides of the lifting plate (52), hanging screw rods (56) are symmetrically arranged. At the bottom end of the hanging screw rod (56), a locking block (55) is installed. The locking block (55) slides up and down in the locking groove (511).

2. A hydraulic lifting platform with a locking mechanism as described in claim 1, characterized in that, The left side of the lower part and the left side of the upper part of the scissor lift (2) are respectively rotatably connected to the base (1) and the lifting table (4) through rotating shafts. The upper right side of the scissor lift (2) is slidably connected to the lower part of the lifting table (4) through a shaft pin and a roller.

3. A hydraulic lifting platform with a locking mechanism as claimed in claim 1, wherein, On the front and rear inner walls of the base (1), guide grooves (11) are arranged. The moving shaft (6) includes a first moving rod (61) and a second moving rod (62). The first moving rod (61) and the second moving rod (62) are connected by a connecting plate. At the front and rear ends of the first moving rod (61) and the second moving rod (62), rollers are arranged. The rollers roll in the guide grooves (11).

4. A hydraulic lifting platform with a locking mechanism according to claim 3, characterized in that, On the outer surface of the outer circles of the first moving rod (61) and the second moving rod (62), guide holes are formed at the front and rear ends above. Below the lifting plate (52), four guide rods (521) distributed in a rectangular structure are arranged. The guide rods (521) slide up and down in the guide holes. The lifting plate (52) is lapped on the outer surfaces of the outer circles of the first moving rod (61) and the second moving rod (62) above.

5. A hydraulic lifting platform with a locking mechanism according to claim 1, wherein, Two groups of circular holes are vertically penetrated through the lifting plate (52). The two hanging screw rods (56) respectively pass through the two groups of circular holes and are located below them. A return spring (57) is sleeved on the hanging screw rod (56). The upper and lower ends of the return spring (57) abut between the lifting plate (52) and the locking block (55).

6. The hydraulic lifting platform with a locking mechanism according to claim 3, characterized in that, Below the first moving rod (61) and the second moving rod (62), a fixing plate (53) is installed by screws. Below the fixing plate (53), an electric push rod (54) is installed. The push rod of the electric push rod (54) passes through the fixing plate (53) and is located above it. Above the electric push rod (54), an extension rod is provided. The top end of the extension rod is connected to the lower part of the lifting plate (52).

7. A hydraulic lifting platform with a locking mechanism according to claim 1, characterized in that, One ends of the locking groove (511) and the locking block (55) far from the push rod of the hydraulic cylinder (3) are designed as vertical surfaces. One ends of the locking groove (511) and the locking block (55) close to the push rod of the hydraulic cylinder (3) are provided with inclined surfaces to form sliding inclined surfaces (512).

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