Chain breakage protection mechanism for fixed guide rail type lifting platform

Abstract

The utility model discloses a chain breakage protection mechanism for a fixed guide rail type lifting platform, which comprises a transmission gear, a transmission chain is arranged outside the transmission gear, a vertical connecting rod is arranged on one side of the top of the transmission gear, an abutting block is mounted at the bottom of the vertical connecting rod, a swing arm is mounted in the vertical connecting rod in a penetrating manner, and the swing arm is fixedly connected with the transmission gear. A driving air cylinder is arranged on one side of the vertical connecting rod, a horizontal connecting rod is fixed to the output end of the driving air cylinder, one end of the horizontal connecting rod is rotationally connected with one end of the swing arm, and a first limiting assembly is arranged outside the transmission gear; through the designed first limiting assembly, the limiting effect on the transmission gear when the transmission chain is broken is conveniently improved, the abutting block can be stably clamped with the transmission gear, meanwhile, the situation that tooth blocks of the transmission gear are broken is not prone to occurring, the protection effect on the lifting platform when the chain is broken can be improved, and practicability is good.

Description

Technical Field

[0001] The utility model relates to the technical field of lifting platforms, in particular to a chain breaking protection mechanism for a fixed guide rail type lifting platform. Background Art

[0002] The lifting platform is a multifunctional lifting and loading and unloading mechanical equipment, and also refers to the equipment for vertical transportation in logistics systems such as factories and automatic warehouses. The lifting platform is often equipped with various flat conveying equipment as a connecting device for conveyor lines at different heights. The free lifting feature of the lifting platform has been widely used in municipal maintenance, cargo transportation at docks and logistics centers, building decoration, etc. The fixed guide rail lifting platform is one of the lifting platforms. The fixed guide rail lifting platform usually realizes transmission and lifting through a sprocket. During the operation of the equipment, if the transmission link breaks, the platform will fall rapidly, causing damage to the equipment or personal injury. Therefore, the lifting platform is usually installed with a chain break protection mechanism to improve the safety of the lifting platform during operation. However, the existing chain break protection mechanism has the problem that when the clamping block is quickly engaged with the gear, the tooth block of the transmission gear may break, which makes the limiting effect of the clamping block on the transmission gear not high enough, and the practical effect is not good enough, and there is room for improvement. Utility Model Content

[0003] The purpose of the utility model is to provide a chain breaking protection mechanism for a fixed rail lifting platform to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a chain breaking protection mechanism for a fixed guide rail lifting platform, comprising a transmission gear, a transmission chain is arranged on the outside of the transmission gear, a vertical connecting rod is arranged on the top side of the transmission gear, a tightening block is installed on the bottom of the vertical connecting rod, a swing arm is installed through the inside of the vertical connecting rod, a driving cylinder is arranged on one side of the vertical connecting rod, a horizontal connecting rod is fixed to the output end of the driving cylinder, one end of the horizontal connecting rod is rotatably connected to one end of the swing arm, and a first limit assembly is arranged on the outside of the transmission gear.

[0005] The first limiting component includes a limiting gear ring mounted on the outside of the transmission gear, a connecting plate is installed in the middle of the rear surface of the transmission gear, and fixing bosses are symmetrically installed on the outer surfaces of both ends of the connecting plate. The top and bottom of the surface of the limiting gear ring are symmetrically provided with mounting grooves for the fixing bosses to engage with, and the inner side surface of the limiting gear ring is provided with connecting tooth grooves that are compatible with the transmission gear at equal angles.

[0006] As a further preferred embodiment of the present technical solution, a fixing strip is installed in the middle of the opening of the mounting slot, and the middle of the inner surface of the fixing strip is an arc surface.

[0007] As a further preferred embodiment of the present technical solution, the surface length of the connecting plate is greater than the outer diameter of the transmission gear, and the transmission gear is rotatably connected to the middle portion of the connecting plate.

[0008] As a further preferred embodiment of the present technical solution, a fixing plate is provided at the other end of the swing arm, a mounting plate is fixed to the other end surface of the driving cylinder, and both the fixing plate and the mounting plate are connected to the guide rail mounting frame of the lifting platform.

[0009] As a further preferred embodiment of the present technical solution, a second limiting assembly is provided on the outer surface of the transmission gear, the second limiting assembly includes a limiting plate installed on one side surface of the limiting gear ring, a connecting block is fixed at equal distances on one end surface of the limiting plate, a fixing ring is fixed on the outer surface of the transmission gear, and limiting grooves are provided at equal angles on the surface of the fixing ring.

[0010] As a further preferred embodiment of the present technical solution, the longitudinal section of the limit plate is "L"-shaped, and the connecting block and the fixing ring are arranged in a staggered state.

[0011] The utility model provides a chain breaking protection mechanism for a fixed guide rail lifting platform, which has the following beneficial effects:

[0012] 1. The utility model is designed with a first limiting component, which is convenient for improving the limiting effect of the transmission chain on the transmission gear when the transmission chain breaks, so that the clamping block can be firmly engaged with the transmission gear, and the transmission gear is not prone to tooth block breakage, which can improve the protection effect of the lifting platform when the chain breaks, and has good practicality.

[0013] 2. The utility model is designed with a second limiting component to further improve the limiting effect of the protection mechanism on the transmission gear when the chain is broken, so that when the chain of the lifting platform is broken, the transmission gear can stop rotating in time, which can reduce the possibility of damage to the equipment and has a better practical effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the installation structure of the first limiting component and the second limiting component in the utility model;

[0016] Figure 3 for Figure 2 A magnified schematic diagram of the middle A area;

[0017] In the figure: 1. transmission gear; 2. transmission chain; 3. driving cylinder; 4. horizontal connecting rod; 5. vertical connecting rod; 6. swing arm; 7. fixing plate; 8. tightening block; 9. mounting plate; 10. limiting gear ring; 11. connecting tooth groove; 12. connecting plate; 13. limiting plate; 14. connecting block; 15. fixing ring; 16. limiting slot; 17. fixing boss; 18. fixing strip; 19. mounting slot. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0019] The utility model provides a technical solution: Figure 1 and Figure 2 As shown, in this embodiment, a chain breaking protection mechanism for a fixed rail type lifting platform comprises a transmission gear 1, a transmission chain 2 is arranged on the outside of the transmission gear 1, a vertical connecting rod 5 is arranged on one side of the top of the transmission gear 1, a tightening block 8 is installed on the bottom of the vertical connecting rod 5, a swing arm 6 is installed through the inside of the vertical connecting rod 5, a driving cylinder 3 is arranged on one side of the vertical connecting rod 5, a horizontal connecting rod 4 is fixed to the output end of the driving cylinder 3, one end of the horizontal connecting rod 4 is rotatably connected to one end of the swing arm 6, a fixing plate 7 is arranged on the other end of the swing arm 6, a mounting plate 9 is fixed to the other end surface of the driving cylinder 3, the fixing plate 7 and the mounting plate 9 are both connected to the guide rail mounting frame of the lifting platform, a first limiting assembly is arranged on the outside of the transmission gear 1, and the first limiting assembly includes a sleeve arranged on the transmission gear 1 The external limiting gear ring 10 and the connecting plate 12 are installed in the middle of the rear surface of the transmission gear 1. The surface length of the connecting plate 12 is greater than the outer diameter of the transmission gear 1. The transmission gear 1 is rotatably connected to the middle of the connecting plate 12. The outer surfaces of both ends of the connecting plate 12 are symmetrically installed with fixing bosses 17. The top and bottom of the surface of the limiting gear ring 10 are symmetrically provided with mounting grooves 19 for the fixing bosses 17 to engage with. The inner side surface of the limiting gear ring 10 is provided with connecting tooth grooves 11 that are compatible with the transmission gear 1 at equal angles. A fixing strip 18 is installed in the middle of the opening of the mounting groove 19. The middle part of the inner surface of the fixing strip 18 is an arc surface, which is convenient for improving the limiting effect of the lifting platform on the transmission gear 1 when the chain is broken, so that the transmission gear 1 can stop rotating in time, and the practicality is good.

[0020] like Figure 1 and Figure 2As shown, a second limiting assembly is provided on the outer surface of the transmission gear 1, and the second limiting assembly includes a limiting plate 13 installed on one side surface of the limiting gear ring 10, and a connecting block 14 is fixed at equal distances on one end surface of the limiting plate 13, and a fixing ring 15 is fixed on the outer surface of the transmission gear 1, and limiting grooves 16 are provided at equal angles on the surface of the fixing ring 15. The longitudinal section of the limiting plate 13 is "L"-shaped, and the connecting block 14 and the fixing ring 15 are staggered, so as to further improve the limiting effect of the transmission gear 1, and can improve the protection effect of the protective mechanism on the lifting platform when the chain is broken, so as to reduce the possibility of damage to the lifting platform, and the practical effect is better.

[0021] The utility model provides a chain breaking protection mechanism for a fixed rail type lifting platform, and the specific working principle is as follows: when the utility model is in use, when the lifting platform breaks the chain, the horizontal connecting rod 4 at the output end of the driving cylinder 3 will drive the swing arm 6 to swing, and at this time the vertical connecting rod 5 will move vertically, so that the tightening block 8 can approach the surface of the limiting gear ring 10 outside the transmission gear 1, until the tightening block 8 is limitedly meshed with the outer surface of the limiting gear ring 10, and at the same time, the tightening block 8 will generate a certain thrust on the limiting gear ring 10, so that the limiting gear ring 10 will move like water, and at this time the outer surface of the fixed boss 17 will be tightly fitted with the inner wall of the other end of the inner side of the mounting slot 19, and at the same time, the inner side of the limiting gear ring 10 The connecting tooth groove 11 on the side surface will mesh with the outer surface of the transmission gear 1, thereby achieving the limitation of the transmission gear 1, so that the transmission gear 1 can stop rotating, improving the limiting effect of the protection mechanism on the transmission gear 1, and having good practicality; when the limiting gear ring 10 moves horizontally, the limiting gear ring 10 will drive the limiting plate 13 to move on the surface of the transmission gear 1 until the connecting block 14 at one end of the limiting plate 13 is limitedly engaged with the limiting groove 16 on the surface of the fixing ring 15, thereby achieving the purpose of further limiting the transmission gear 1, so that the transmission gear 1 can stop rotating in time when the chain is broken, improving the protection effect when the chain is broken, and facilitating reducing the possibility of damage to the lifting platform when the chain is broken, and having good practical effect.

[0022] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A chain breaking protection mechanism for a fixed rail lifting platform, comprising a transmission gear (1), a transmission chain (2) is arranged outside the transmission gear (1), a vertical connecting rod (5) is arranged on one side of the top of the transmission gear (1), a tightening block (8) is installed at the bottom of the vertical connecting rod (5), a swing arm (6) is installed through the inside of the vertical connecting rod (5), a driving cylinder (3) is arranged on one side of the vertical connecting rod (5), a horizontal connecting rod (4) is fixed to the output end of the driving cylinder (3), one end of the horizontal connecting rod (4) is rotatably connected to one end of the swing arm (6), and is characterized in that: A first limiting component is arranged outside the transmission gear (1); The first limiting assembly comprises a limiting gear ring (10) sleeved on the outside of the transmission gear (1); a connecting plate (12) is installed in the middle of the rear surface of the transmission gear (1); fixed bosses (17) are symmetrically installed on the outer surfaces of both ends of the connecting plate (12); mounting slots (19) for the fixed bosses (17) to engage are symmetrically provided at the top and bottom of the surface of the limiting gear ring (10); and connecting tooth grooves (11) adapted to the transmission gear (1) are provided at equal angles on one side surface of the inner side of the limiting gear ring (10).

2. A chain breaking protection mechanism for a fixed rail lifting platform according to claim 1, characterized in that: A fixing strip (18) is installed in the middle of the opening of the installation slot (19), and the middle of the inner side surface of the fixing strip (18) is a curved surface.

3. The chain breaking protection mechanism for a fixed rail lifting platform according to claim 1, characterized in that: The surface length of the connecting plate (12) is greater than the outer diameter of the transmission gear (1), and the transmission gear (1) is rotatably connected to the middle part of the connecting plate (12).

4. The chain breaking protection mechanism for a fixed rail lifting platform according to claim 1, characterized in that: A fixing plate (7) is provided at the other end of the swing arm (6), and a mounting plate (9) is fixed to the other end surface of the driving cylinder (3), and both the fixing plate (7) and the mounting plate (9) are connected to the guide rail mounting frame of the lifting platform.

5. The chain breaking protection mechanism for a fixed rail lifting platform according to claim 3 is characterized in that: The outer surface of the transmission gear (1) is provided with a second limiting assembly, the second limiting assembly comprising a limiting plate (13) mounted on a side surface of the limiting gear ring (10), a connecting block (14) being fixed at equal distances on one end surface of the limiting plate (13), a fixing ring (15) being fixed on the outer surface of the transmission gear (1), and limiting grooves (16) being provided on the surface of the fixing ring (15) at equal angles.

6. A chain breaking protection mechanism for a fixed rail lifting platform according to claim 5, characterized in that: The longitudinal section of the limiting plate (13) is L-shaped, and the connecting block (14) and the fixing ring (15) are arranged in a staggered manner.

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