Limiting device of lifting platform

Abstract

The utility model relates to the technical field of lifting platforms, in particular to a lifting platform limiting device which comprises a lifting platform and a base, a supporting mechanism is arranged between the lifting platform and the base, a limiting mechanism is arranged on the lifting platform and comprises supporting frames, and the supporting frames are symmetrically and fixedly installed on one side of the top end of the lifting platform. Limiting grooves are formed in the sides, away from each other, of the supporting frames, limiting blocks are slidably mounted in the middles of the interiors of the supporting frames, and mounting shafts are rotatably mounted on the sides, close to the supporting frames, of the limiting blocks. The lifting table has the beneficial effects that when the lifting table moves upwards, a limiting block can move in a supporting frame, due to the fact that a plurality of limiting grooves matched with limiting shafts are formed in a limiting groove, the limiting shafts can gradually move in the limiting grooves under cooperation of a torsional spring and a rotating plate, and therefore limiting of the lifting table in the ascending process is achieved, the lifting table is prevented from suddenly falling, and the safety of the lifting table is improved. And potential safety hazards are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of lifting platforms, in particular to a lifting platform limiting device. Background Art

[0002] A lifting platform is a multifunctional lifting and loading equipment, which is mainly divided into two types: fixed and mobile, namely mobile lifting platforms and fixed lifting platforms. When choosing a lifting platform, you should consider its application scenarios, load requirements, lifting height, power requirements and other factors. At the same time, safety is always the most important consideration. Whether it is the safety of the operator or the normal operation safety of the equipment, you need to strictly abide by the relevant operating procedures and maintenance measures.

[0003] In the prior art, a lifting platform is raised and lowered by a hydraulic device, an electric push rod or other driving mechanism. However, when the lifting platform is loaded with heavy goods, the driving device is under too much pressure, which can easily cause the platform to drop suddenly, posing a danger to nearby workers and posing a high safety hazard. Utility Model Content

[0004] The purpose of the present invention is to provide a lifting platform limiting device to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a lifting platform limit device, comprising a lifting platform and a base, a supporting mechanism is provided between the lifting platform and the base, a limiting mechanism is provided on the lifting platform, and the limiting mechanism includes a support frame, the support frame is symmetrically fixedly mounted on one side of the top end of the lifting platform, the support frames are provided with a limiting slot on the side away from each other, a limiting block is slidably mounted in the middle of the support frame, the limiting block is rotatably mounted on the side close to the support frame, a rotating plate is rotatably mounted on the outer periphery of the mounting shaft close to the side of the support frame, a limiting shaft is fixedly mounted on the lower part of the rotating plate, a torsion spring is provided on the outer periphery of the mounting shaft close to each other, a clamping slot and a notch are sequentially provided on the upper part of the rotating plate from left to right, and an elastic clamping plate is fixedly mounted on the upper part of the side where the limiting blocks are away from each other;

[0006] The driving mechanism is arranged at the middle part of the top end of the base.

[0007] Preferably, guide grooves are provided on both the front and rear ends of the base, rollers are installed in the guide grooves, connecting rods are fixedly installed on the side where the rollers are close to each other, and baffles are fixedly installed on the front and rear ends of the connecting rods.

[0008] Preferably, a moving groove is symmetrically opened on one side of the top of the lifting platform, and a moving block is slidably installed in the moving groove, and the moving blocks are respectively fixedly installed on the top of the limiting block on the same side.

[0009] Preferably, the supporting mechanism includes two groups of connecting rods 1 and 2, and the middle parts of the connecting rods 1 and 2 in the same group are connected by a pin shaft. The lower part of the connecting rod is rotatably installed on the front and rear sides of the outer periphery of the connecting rod, and the upper part of the connecting rod 1 is rotatably installed on the front and rear parts of the other side of the bottom end of the lifting platform, and the front and rear parts of the other side of the base are rotatably installed with connecting rod 2, and the upper part of the connecting rod 2 is rotatably installed on the lower part of the moving block on the same side.

[0010] Preferably, the driving mechanism includes two fixing plates, which are symmetrically distributed and fixedly mounted on the middle of one side of the top of the base, and threaded rods are rotatably mounted on one side of the fixing plates close to each other.

[0011] Preferably, a movable frame is fixedly mounted on the middle portion of the outer periphery of the connecting rod, and the movable frame is fixedly mounted on the middle portion of the outer periphery of the connecting rod.

[0012] Preferably, a motor mounting bracket is fixedly installed in the middle of the top of the base, a stepper motor is fixedly installed in the middle of the motor mounting bracket, a driving gear is fixedly installed on the driving end of the stepper motor, a driven gear is meshed and connected to the upper part of the driving gear, and the driven gear is fixedly installed on the other end of the threaded rod.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] A limiting mechanism is provided in the lifting platform limiting device proposed in the present invention. When the lifting platform moves upward, the limiting block will move in the support frame. Since a plurality of limiting grooves compatible with the limiting shaft are provided in the limiting groove, the limiting shaft will gradually move in the limiting groove with the cooperation of the torsion spring and the rotating plate, thereby realizing the limitation of the lifting platform during the rising process, avoiding the lifting platform from falling suddenly, and reducing safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the main three-dimensional structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the partial structure of the driving mechanism of the utility model;

[0017] Figure 3 This is a schematic diagram of the partial structure of the lifting platform of the utility model;

[0018] Figure 4 It is a schematic diagram of the local structure of the limiting mechanism of the utility model.

[0019] In the figure: 1. base; 2. guide groove; 3. baffle; 4. connecting rod; 5. driving mechanism; 51. motor mounting bracket; 52. stepping motor; 53. driven gear; 54. threaded rod; 55. fixed plate; 56. driving gear; 57. moving bracket; 6. connecting rod 1; 7. moving block; 8. limiting mechanism; 81. supporting bracket; 82. limiting block; 83. limiting groove; 84. limiting shaft; 85. rotating plate; 86. notch; 87. mounting shaft; 88. clamping slot; 89. elastic clamping plate; 810. torsion spring; 9. moving groove; 10. connecting rod 2; 11. roller; 12. lifting platform. DETAILED DESCRIPTION

[0020] In order to clearly and completely describe the purpose and technical solution of the present invention and make its advantages more clearly understood, the following is a further detailed description of the embodiments of the present invention in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only part of the embodiments of the present invention, not all of them, and are only used to explain the embodiments of the present invention and are not intended to limit the embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] See also Figures 1 to 4The utility model provides a technical solution: a lifting platform limit device, including a lifting platform 12 and a base 1, a supporting mechanism is provided between the lifting platform 12 and the base 1, and a limit mechanism 8 is provided on the lifting platform 12, and the limit mechanism 8 includes a support frame 81, the support frame 81 is symmetrically fixed on one side of the top of the lifting platform 12, and the support frames 81 are provided with a limit slot 83 on one side away from each other. A limit block 82 is slidably installed in the middle of the support frame 81, and a mounting shaft 87 is rotatably installed on the side of the limit block 82 near the support frame 81. A rotating plate 85 is rotatably installed on the side of the rotating plate 85 near the support frame 81. A limit shaft 84 is fixedly installed on the lower part of the rotating plate 85, and a torsion spring 810 is provided on the outer periphery of the mounting shaft 87 on the side close to each other. A card slot 88 and a notch 86 are provided on the upper part of the rotating plate 85 from left to right. An elastic card plate 89 is fixed on the upper part of the limit block 82 on the side away from each other, and a driving mechanism 5 is provided. The driving mechanism 5 is provided in the middle of the top of the base 1, and the lifting platform 12 moves upward When the moving block 7 moves in the moving groove 9, the limiting block 82 moves in the support frame 81. As the limiting block 82 moves in the support frame 81, the limiting shaft 84 moves in the limiting groove 83. Since the limiting groove 83 is provided with a plurality of limiting grooves and horizontal grooves that are adapted to the limiting shaft 84, the limiting shaft 84 moves gradually in the limiting groove under the cooperation of the torsion spring 810 and the rotating plate 85, and the side wall of one side of the limiting groove is vertical, and the side wall of the other side of the limiting groove is vertical. It has a smooth arc surface, so that the limit shaft 84 can only move along one side of the limit groove 83. If the limit shaft 84 moves in the opposite direction, the vertical side wall will limit the limit shaft 84, so that the lifting platform 12 can be limited when it rises, avoiding the sudden drop of the lifting platform 12, reducing safety hazards. At the same time, when the limit shaft 84 moves to the horizontal groove position, the elastic card plate 89 will be engaged in the card groove 88, thereby achieving the rotating plate 85 to remain horizontal, and the lifting platform 12 can be lowered at this time.

[0022] A guide groove 2 is provided on the front and rear end sides of the base 1, and rollers 11 are installed in the guide grooves 2. A connecting rod 4 is fixedly installed on one side of the rollers 11 close to each other, and a baffle 3 is fixedly installed on the front and rear ends of the connecting rod 4. A moving groove 9 is symmetrically provided on one side of the top of the lifting platform 12, and a moving block 7 is slidably installed in the moving groove 9. The moving blocks 7 are respectively fixedly installed on the top of the limit block 82 on the same side. The supporting mechanism includes two groups of connecting rods 1 6 and connecting rods 2 10. The middle parts of the same group of connecting rods 1 6 and connecting rods 2 10 are connected by pins. The lower part of the connecting rod 1 6 is rotatably installed on the front and rear sides of the outer periphery of the connecting rod 4, and the upper part of the connecting rod 1 6 The two parts are rotatably installed on the front and rear parts of the other side of the bottom end of the lifting platform 12, and the front and rear parts of the other side of the base 1 are rotatably installed with connecting rod 2 10. The upper parts of connecting rod 2 10 are rotatably installed on the lower part of the moving block 7 on the same side. By arranging connecting rod 1 6 and connecting rod 2 10, connecting rod 1 6 and connecting rod 2 10 are cross-arranged, which can increase the stability of the lifting platform 12 during use. At the same time, by arranging rollers 11 and moving block 7, and providing a ball in the middle of the moving block 7, the friction of connecting rod 1 6 and connecting rod 2 10 during movement can be reduced, thereby improving the smoothness of the lifting platform 12 during use.

[0023] The driving mechanism 5 includes two fixed plates 55, which are symmetrically distributed and fixedly installed in the middle of one side of the top of the base 1. The fixed plates 55 are rotatably installed on one side close to each other. A movable frame 57 is fixedly installed in the middle of the outer periphery of the connecting rod 4. The movable frame 57 is fixedly installed in the middle of the outer periphery of the connecting rod 4. A motor mounting frame 51 is fixedly installed in the middle of the top of the base 1. A stepping motor 52 is fixedly installed in the middle of the motor mounting frame 51. A driving gear 56 is fixedly installed on the driving end of the stepping motor 52. The upper part of the driving gear 56 is meshed with a driven gear 53. The driven gear 53 is fixedly mounted on the other end of the threaded rod 54. By controlling the stepper motor 52, the stepper motor 52 can drive the driving gear 56 to rotate synchronously. Since the driving gear 56 and the driven gear 53 are engaged with each other, the threaded rod 54 will rotate synchronously at a uniform speed. With the cooperation of the thread, the moving frame 57 will drive the connecting rod 4 to move along the guide groove 2. In addition, the staff can control the forward and reverse rotation of the stepper motor 52 to cooperate with the connecting rod 1 6 and the connecting rod 2 10 to control the rise or fall of the lifting platform 12.

[0024] The lifting platform 12 is moved upwards by the stepping motor 52 and the driving gear 56 and the driven gear 53.

[0025] Although the above describes the illustrative specific implementation methods of the present application so that those skilled in the art can understand the present application, the present application is not limited to the scope of the specific implementation methods. For those of ordinary skill in the art, as long as various changes are within the spirit and scope of the present application defined and determined by the attached claims, all application creations based on the concept of the present application are protected.

Claims

1. A lifting platform limiting device, comprising a lifting platform (12) and a base (1), wherein a supporting mechanism is provided between the lifting platform (12) and the base (1), and characterized in that: The lifting platform (12) is provided with a limiting mechanism (8), and the limiting mechanism (8) includes a support frame (81), the support frame (81) is symmetrically fixedly installed on one side of the top of the lifting platform (12), the support frame (81) is provided with a limiting groove (83) on the side away from each other, the support frame (81) is slidably installed with a limiting block (82) in the middle part, the limiting block (82) is rotatably installed on the side close to the support frame (81), the outer periphery of the installing shaft (87) is rotatably installed on the side close to the support frame (81), the rotating plate (85) is rotatably installed on the lower part of the rotating plate (85), the outer periphery of the installing shaft (87) is provided with a torsion spring (810) on the side close to each other, the upper part of the rotating plate (85) is provided with a card slot (88) and a notch (86) in sequence from left to right, and the upper part of the limiting block (82) is fixedly installed with an elastic card plate (89) on the side away from each other; A driving mechanism (5) is provided at the middle of the top end of the base (1).

2. A lifting platform limiting device according to claim 1, characterized in that: A guide groove (2) is provided on one side of the front and rear ends of the base (1), rollers (11) are installed in the guide grooves (2), a connecting rod (4) is fixedly installed on one side of the rollers (11) close to each other, and baffles (3) are fixedly installed on the front and rear ends of the connecting rod (4).

3. The lifting platform limiting device according to claim 1, characterized in that: A moving groove (9) is symmetrically provided on one side of the top of the lifting platform (12), and a moving block (7) is slidably installed in each of the moving grooves (9). The moving blocks (7) are respectively fixedly installed on the top of the limiting block (82) on the same side.

4. The lifting platform limiting device according to claim 1, characterized in that: The support mechanism includes two groups of connecting rods 1 (6) and connecting rods 2 (10), the middle parts of the connecting rods 1 (6) and connecting rods 2 (10) of the same group are connected by pins, the lower part of the connecting rod 1 (6) is rotatably mounted on the front and rear sides of the outer periphery of the connecting rod (4), the upper part of the connecting rod 1 (6) is rotatably mounted on the front and rear parts of the other side of the bottom end of the lifting platform (12), the front and rear parts of the other side of the base (1) are rotatably mounted with connecting rods 2 (10), and the upper part of the connecting rods 2 (10) is rotatably mounted on the lower part of the moving block (7) on the same side.

5. The lifting platform limiting device according to claim 1, characterized in that: The driving mechanism (5) comprises two fixing plates (55), the fixing plates (55) being symmetrically distributed and fixedly mounted on the middle portion of one side of the top of the base (1), and the fixing plates (55) being rotatably mounted on one side close to each other.

6. The lifting platform limiting device according to claim 2, characterized in that: A movable frame (57) is fixedly mounted on the middle portion of the outer periphery of the connecting rod (4), and the movable frame (57) is fixedly mounted on the middle portion of the outer periphery of the connecting rod (4).

7. The lifting platform limiting device according to claim 1, characterized in that: A motor mounting frame (51) is fixedly mounted in the middle of the top of the base (1), a stepping motor (52) is fixedly mounted in the middle of the motor mounting frame (51), a driving gear (56) is fixedly mounted on the driving end of the stepping motor (52), the upper part of the driving gear (56) is meshedly connected with a driven gear (53), and the driven gear (53) is fixedly mounted on the other end of the threaded rod (54).

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