A heavy load lifting device

Abstract

A heavy-load lifting device comprises a fixed frame and a lifting platform restricted on the fixed frame; the fixed frame is fixedly provided with racks located on both sides of the lifting platform, each of the racks is meshedly connected with a gear, the lifting platform is provided with a rotating shaft for mounting the gear and a driving motor providing driving force for the rotating shaft, the rotating shaft is provided with a torque-increasing and speed-reducing driven wheel, the output shaft of the driving motor is connected with a driving wheel for driving the torque-increasing and speed-reducing driven wheel to rotate, and the diameter of the driving wheel is smaller than that of the torque-increasing and speed-reducing driven wheel. The utility model can lift heavy objects safely, stably and reliably without changing the operating parameters of the motor.

Description

Technical Field

[0001] The utility model relates to a heavy-load lifting device, belonging to the field of logistics transportation. Background Art

[0002] When cargo handling, lifting, and other vertical transportation are required, a lifting mechanism is often needed. Current lifting mechanisms are generally divided into hydraulically driven and motor driven types. Among them, the motor driven type mainly uses rack and pinion as the core component for transportation.

[0003] Since the rack and pinion lifting mechanism often needs to lift heavier goods, when these heavy goods are lifted, the motor needs to provide a larger torque to rotate the gear shaft. To increase the motor torque, it is usually necessary to increase the voltage or current of the motor during the startup phase, that is, to increase the torque by changing the motor operating parameters. However, this method often causes serious heating of the motor, and at the same time, it will increase the motor energy consumption and motor output speed. The increase in the motor output speed will increase the lifting speed of the goods, which will lead to poor stability when lifting heavy objects and increase safety hazards when handling goods. Utility Model Content

[0004] In view of the deficiencies in the prior art, the present application provides a heavy-load lifting device that can lift heavy objects safely, stably and reliably without changing the operating parameters of the motor.

[0005] A heavy-load lifting device comprises a fixed frame and a lifting platform restricted on the fixed frame; the fixed frame is fixedly provided with racks located on both sides of the lifting platform, each of the racks is meshingly connected with a gear, the lifting platform is provided with a rotating shaft for installing the gear and a driving motor providing driving force for the rotating shaft, the rotating shaft is provided with a torque-increasing and speed-reducing driven wheel, the output shaft of the driving motor is connected to a driving wheel for driving the torque-increasing and speed-reducing driven wheel to rotate, and the diameter of the driving wheel is smaller than the diameter of the torque-increasing and speed-reducing driven wheel.

[0006] Preferably, the torque increasing and speed reducing driven wheel and the driving wheel are both sprockets, and the two are connected by a transmission chain.

[0007] Preferably, the torque increasing and speed reducing driven wheel and the driving wheel are both gears, and the two are meshed with each other.

[0008] Preferably, the lifting platform comprises a platform frame, to which a top cover for covering the driving motor, the torque-increasing and speed-reducing driven wheel and the driving wheel is connected.

[0009] Preferably, the lifting platform is provided with a plurality of supporting parts, and the supporting parts are higher than the top cover.

[0010] Preferably, the lifting platform comprises a bearing seat plate connected to the platform frame, and the bearing seat plate is provided with a bearing seat for mounting the rotating shaft;

[0011] In a straight line direction parallel to the direction of the rack tooth mouth, a supporting bolt for supporting the bearing seat is arranged on both sides of the bearing seat. The platform frame is also connected to a mounting component for installing the supporting bolt, and the mounting component has a threaded hole that is spirally connected to the supporting bolt.

[0012] Preferably, the fixed frame comprises frame columns, and there are four frame columns, which are arranged in pairs on the left and right sides of the lifting platform, and the two frame columns on the same side are arranged on the front and rear sides of the gear; the lifting platform is provided with four limiting components that interact with the four frame columns respectively;

[0013] The limiting assembly includes an upper support roller 1 and a lower support roller 1 arranged in a front-to-back manner, an upper support roller 2 and a lower support roller 2 arranged in a front-to-back manner, and a roller mounting plate for mounting the upper support roller 1, the lower support roller 1, the upper support roller 2 and the lower support roller 2, and the frame column is located in a space surrounded by the upper support roller 1, the lower support roller 1, the upper support roller 2 and the lower support roller 2.

[0014] Preferably, the limiting assembly further comprises a plurality of support rollers three mounted on the roller mounting plate, the support rollers three being arranged between the upper support roller one and the lower support roller one, and being supported on the frame column in the left-right direction.

[0015] Preferably, the fixed frame also includes a rack mounting column, the rack mounting column has a plurality of horizontal adjustment holes arranged from top to bottom, and the horizontal adjustment holes are provided with fastening bolts for connecting with the side surfaces of the rack; the rack mounting column is also provided with a plurality of supporting bolts 2 for supporting the bottom of the rack.

[0016] In summary, the utility model has the following beneficial effects:

[0017] 1: The utility model can lift heavy objects safely, stably and reliably without changing the operating parameters of the motor.

[0018] 2: In the utility model, the frame column is located in the space surrounded by the upper support roller 1, the lower support roller 1, the upper support roller 2 and the lower support roller 2. Each support roller participates in the force in the front and rear directions, so that the force at the connection part between any support roller and the roller mounting plate is more reasonable and no breakage occurs, which better prevents the lifting platform from tilting when the center of gravity of the cargo is biased to one side, ensuring stable and reliable handling of the cargo.

[0019] 3: The utility model has a plurality of horizontal adjustment holes on the rack mounting column, and fastening bolts for connecting with the side of the rack are provided in the horizontal adjustment holes, so that the position of the rack can be reasonably adjusted to ensure the tight engagement between the gear and the rack. At the same time, a plurality of supporting bolts for supporting the bottom of the rack are also provided on the rack mounting column to prevent the rack from tilting, thereby ensuring stable and reliable handling of goods. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of a heavy-load lifting device;

[0021] Figure 2 The schematic diagram of the structure of the lifting platform is shown in FIG.

[0022] Figure 3 This is the explosion diagram of the lifting platform;

[0023] Figure 4 It is a schematic diagram of the structure of the lifting platform when viewed from above;

[0024] Figure 5 The structure diagram of the fixed frame is shown in FIG.

[0025] Figure 6 It is the connection diagram between the rack and the rack mounting column;

[0026] Figure 7 This is an exploded schematic diagram of the rack and rack mounting column. DETAILED DESCRIPTION

[0027] The present invention will be further described below through specific embodiments in conjunction with the accompanying drawings.

[0028] Example:

[0029] Figure 1-4 A heavy-load lifting device is provided, comprising a fixed frame 1 and a lifting platform 2 restricted on the fixed frame 1; racks 3 located on both sides of the lifting platform 2 are fixedly arranged on the fixed frame 1, the racks 3 are arranged vertically, and each rack 3 is meshed and connected with a gear 4; a rotating shaft 5 for mounting the gear 4 and a driving motor 6 for providing driving force for the rotating shaft 5 are provided on the lifting platform 2; under the action of the driving motor 6, the rotating shaft 5 rotates, and the gear 4 rotates with the rotation of the rotating shaft 5, and the gear 4 moves upward or downward while rotating, thereby enabling the lifting platform 2 to be lifted and lowered.

[0030] In this case, a torque-increasing and speed-reducing driven wheel 7 is provided on the rotating shaft 5, and a driving wheel 8 is connected to the output shaft of the driving motor 6. Both the torque-increasing and speed-reducing driven wheel 7 and the driving wheel 8 adopt sprockets, and the two are connected by a transmission chain, so that the driving wheel 8 drives the torque-increasing and speed-reducing driven wheel 7 to rotate. The diameter of the driving wheel 8 is smaller than the diameter of the torque-increasing and speed-reducing driven wheel 7, that is, by using a small wheel to lead a large wheel, the torque-increasing and speed-reducing driven wheel 7 has a larger torque and a smaller speed relative to the motor output shaft without changing the motor operating parameters, so that it can safely, stably and reliably lift larger weights.

[0031] Of course, in other embodiments, the torque-increasing and speed-reducing driven wheel 7 and the driving wheel 8 can also be adopted as gears 4 , which are meshed with each other, and the diameter of the driving wheel 8 is smaller than the diameter of the torque-increasing and speed-reducing driven wheel 7 .

[0032] The lifting platform 2 includes a platform frame 21, to which is connected a top cover 22 for covering a driving motor 6, a torque-increasing and speed-reducing driven wheel 7, and a driving wheel 8. The top cover 22 can effectively prevent dust and, at the same time, carefully isolate structures such as the driving motor 6, the torque-increasing and speed-reducing driven wheel 7, and the driving wheel 8 to improve safety performance.

[0033] The lifting platform 2 has a plurality of supporting parts 23 for carrying goods to be lifted. The supporting parts 23 are higher than the top cover 22 to ensure that the lifted goods will not hit the top cover 22 and the structure inside the top cover 22 .

[0034] The lifting platform 2 also includes a bearing seat plate 24 connected to the platform frame 21, and a bearing seat 25 for mounting the rotating shaft 5 is provided on the bearing seat plate 24. In this case, the lifting device is used to lift heavy loads. When the gear 4 is lifted and lowered on the rack 3, a large horizontal extrusion force is generated between the two, and the extrusion force of the rack 3 on the gear 4 will act on the bearing seat 25. In order to ensure the stability of the bearing seat 25, a supporting bolt 26 for supporting the bearing seat 25 is also provided on both sides of the bearing seat 25 in a straight line direction parallel to the tooth opening direction of the rack 3. The platform frame 21 is also connected with a mounting component 27 for mounting the supporting bolt 26. The mounting component 27 is made of a profile such as a channel steel or a plate. The mounting component 27 has a threaded hole 1 that is spirally connected to the supporting bolt 26, and the threaded engagement between the threaded hole 1 and the supporting bolt 26 provides a supporting force.

[0035] like Figure 1 , 5As shown in Figures 4 and 5, the fixed frame 1 includes frame columns 11. To simplify the structure of the frame columns 11, there are four frame columns 11, which are arranged in pairs on the left and right sides of the lifting platform 2, and the two frame columns 11 on the same side are arranged on the front and rear sides of the gear 4. At the same time, the lifting platform 2 is provided with four limiting components 28 that interact with the four frame columns 11 respectively, so as to limit the lifting platform 2 to the fixed frame 1. The left and right directions mentioned here and subsequently refer to the directions parallel to the axial direction of the rotating shaft 5, and the front and rear directions refer to the directions perpendicular to the left and right directions.

[0036] like Figure 4 As shown, the limiting assembly 28 specifically includes an upper support roller 281, a lower support roller 282, an upper support roller 283 and a lower support roller 284. The upper support roller 281 and the lower support roller 282 are arranged front to back, and the upper support roller 283 and the lower support roller 284 are also arranged front to back. The upper support roller 281, the lower support roller 282, the upper support roller 283 and the lower support roller 284 are installed on a roller mounting plate 285, and the frame column 11 is in a space surrounded by the upper support roller 281, the lower support roller 282, the upper support roller 283 and the lower support roller 284. Since heavy-loaded goods are lifted, higher requirements are placed on the performance of the limiting component 28. In this case, with this structural design, each support roller is subjected to force in the front and rear directions, so that the force at the connection between any support roller and the roller mounting plate 285 is more reasonable and does not break, thereby better preventing the lifting platform 2 from tilting when the center of gravity of the goods is biased to one side, ensuring stable and reliable handling of the goods.

[0037] The limiting assembly 28 also includes a plurality of support rollers 286 mounted on the roller mounting plate 285. The support rollers 286 are arranged between the upper support roller 281 and the lower support roller 282, and are supported on the frame column 11 in the left and right directions. The support rollers 286 on the plurality of limiting assemblies 28 together make the lifting platform 2 more stable.

[0038] like Figure 5 As shown, the fixed frame 1 also includes a rack mounting column 12, such as Figure 6-7 As shown, the rack mounting column 12 has a plurality of horizontal adjustment holes 121 arranged from top to bottom, and the horizontal adjustment holes 121 are provided with fastening bolts 13 for connecting with the side of the rack 3, and the side of the rack 3 is correspondingly provided with fastening screw holes for matching with the fastening bolts 13. With this structural design, before the fastening bolts 13 are used to lock the rack 3, the position of the rack 3 can be reasonably adjusted to ensure the tight engagement between the gear 4 and the rack 3. The rack mounting column 12 is also provided with a plurality of abutting bolts 14 for abutting against the bottom of the rack 3 to prevent the rack 3 from tilting, thereby ensuring stable and reliable handling of goods.

[0039] The above embodiments are only for describing the preferred implementation of the utility model, and are not intended to limit the concept and scope of the utility model. Without departing from the design concept of the utility model, various modifications and improvements made by ordinary persons in the art to the technical solution of the utility model should fall within the protection scope of the utility model, and the technical contents of the utility model for protection have been fully recorded in the claims.

Claims

1. A heavy-load lifting device, comprising a fixed frame (1) and a lifting platform (2) restricted on the fixed frame (1); the fixed frame (1) is fixedly provided with racks (3) located on both sides of the lifting platform (2), each of the racks (3) is meshingly connected with a gear (4), the lifting platform (2) is provided with a rotating shaft (5) for mounting the gear (4) and a driving motor (6) for providing driving force for the rotating shaft (5), characterized in that: The rotating shaft (5) is provided with a torque-increasing and speed-reducing driven wheel (7), and the output shaft of the driving motor (6) is connected to a driving wheel (8) for driving the torque-increasing and speed-reducing driven wheel (7) to rotate, wherein the diameter of the driving wheel (8) is smaller than the diameter of the torque-increasing and speed-reducing driven wheel (7).

2. A heavy load lifting device according to claim 1, characterized in that: The torque increasing and speed reducing driven wheel (7) and the driving wheel (8) are both sprockets, and the two are connected via a transmission chain.

3. A heavy load lifting device according to claim 1, characterized in that: The torque increasing and speed reducing driven wheel (7) and the driving wheel (8) are both gears (4), and the two are meshed with each other.

4. A heavy load lifting device according to claim 1, characterized in that: The lifting platform (2) comprises a platform frame (21), and a top cover (22) for covering the driving motor (6), the torque-increasing and speed-reducing driven wheel (7), and the driving wheel (8) is connected to the platform frame (21).

5. A heavy load lifting device according to claim 4, characterized in that: The lifting platform (2) is provided with a plurality of supporting parts (23), and the supporting parts (23) are higher than the top cover (22).

6. A heavy load lifting device according to claim 4, characterized in that: The lifting platform (2) comprises a bearing seat plate (24) connected to the platform frame (21), and a bearing seat (25) for mounting the rotating shaft (5) is provided on the bearing seat plate (24); In a straight line direction parallel to the tooth opening direction of the rack (3), a supporting bolt (26) for supporting the bearing seat (25) is provided on both sides of the bearing seat (25), and a mounting component (27) for mounting the supporting bolt (26) is connected to the platform frame (21), and the mounting component (27) has a threaded hole that is spirally connected to the supporting bolt (26).

7. A heavy load lifting device according to claim 1, characterized in that: The fixed frame (1) comprises frame columns (11), and there are four frame columns (11) arranged in pairs on the left and right sides of the lifting platform (2), and the two frame columns (11) on the same side are arranged on the front and rear sides of the gear (4); the lifting platform (2) is provided with four limiting components (28) that interact with the four frame columns (11) respectively; The limiting assembly (28) comprises an upper support roller (281) and a lower support roller (282) arranged in a front-to-back manner, an upper support roller (283) and a lower support roller (284) arranged in a front-to-back manner, and a roller mounting plate (285) for mounting the upper support roller (281), the lower support roller (282), the upper support roller (283) and the lower support roller (284), and the frame column (11) is located in a space enclosed by the upper support roller (281), the lower support roller (282), the upper support roller (283) and the lower support roller (284).

8. A heavy load lifting device according to claim 7, characterized in that: The limiting assembly (28) further comprises a plurality of supporting rollers (286) mounted on a roller mounting plate (285), wherein the supporting rollers (286) are arranged between the upper supporting roller (281) and the lower supporting roller (282), and are supported on the frame column (11) in the left-right direction.

9. A heavy load lifting device according to claim 1, characterized in that: The fixed frame (1) further comprises a rack mounting column (12), the rack mounting column (12) having a plurality of horizontal adjustment holes (121) arranged from top to bottom, the horizontal adjustment holes (121) being provided with fastening bolts (13) for connecting to the side surfaces of the rack (3); the rack mounting column (12) is also provided with a plurality of retaining bolts (14) for retaining the bottom of the rack (3).

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