A part flipping mechanism with self-locking function

Abstract

A self-locking part flipping mechanism, relating to the field of large part processing, includes a telescopic beam base, a shaft clamping assembly, and a rotating shaft. The telescopic beam base has vertical supports at both ends, forming a U-shaped overall frame. The supports include a first support and a second support. A worm gear reducer is located on the outer side of the first support, and a high-ratio gear set is located on the inner side. The worm gear of the worm gear reducer meshes with the gear of the high-ratio gear set to transmit power. The driving end of the shaft clamping assembly includes a first lower base connected to the high-ratio gear set and a matching first upper cover plate. The driven end includes a second lower base mounted on a second support and a matching second upper cover plate. The lower base and the upper cover plate have mating square positioning holes for fixing the end of the rotating shaft. This invention achieves precise flipping control of large parts, has a self-locking function at any angle, and can adapt to the omnidirectional flipping needs of workpieces of different shapes.

Description

Technical Field

[0001] This utility model relates to the field of large parts processing, specifically to a parts flipping mechanism with a self-locking function. Background Technology

[0002] In the field of mechanical equipment manufacturing, the flipping operation of large parts has long faced severe challenges. These parts are typically heavy, weighing over 1 ton, and have irregular dimensions. The traditional flipping method, which uses cranes with slings, wire ropes, chains, etc., has many drawbacks: on the one hand, it requires frequent manual adjustment of the center of gravity, which is not only inefficient and reliant on manual experience to judge the flipping path, but also poses significant safety hazards such as workpiece swaying and slipping; on the other hand, it cannot meet the precise positioning requirements of non-standard angles such as 37° and 128°, and lacks a reliable mid-operation pause function.

[0003] Currently, most flipping equipment on the market has structural defects: the cantilever structure has a small load capacity and is difficult to adapt to the flipping requirements of irregularly shaped parts; while the clamping or electromagnetic chuck fixing method used for regular workpieces such as plates and cylinders is not adaptable to irregularly shaped parts, and is prone to workpiece deformation or even clamping failure due to uneven force.

[0004] Although industrial robot solutions have achieved flexible flipping to some extent, their high price and limited load capacity (most of them not exceeding 1 ton) make it difficult to meet the flipping needs of small and medium-sized enterprises (SMEs) for large parts, making it difficult to promote and apply this technology in SMEs. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a part flipping mechanism with a self-locking function to solve the problem of difficulty in flipping and hoisting large parts in the prior art, realize precise flipping control of large parts, have a self-locking function at any angle, and can adapt to the all-round flipping needs of workpieces of different shapes.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a part flipping mechanism with a self-locking function, comprising a telescopic beam base, a shaft clamping assembly, and a rotating shaft; the telescopic beam base has vertical supports at both ends, forming a U-shaped integral frame, the supports including a first support and a second support arranged in parallel, the first support having a worm gear reducer on the outer side and a high-ratio gear set on the inner side, the worm wheel of the worm gear reducer cooperating with the gear of the high-ratio gear set to realize power transmission; the shaft clamping assembly includes an active end and a driven end, the active end including a first lower base connected to the high-ratio gear set and a matching detachable first upper cover plate, the driven end including a second lower base set on the second support and a matching detachable second upper cover plate; the first lower base and the first upper cover plate, and the second lower base and the second upper cover plate are all provided with mutually cooperating square positioning holes, the square positioning holes being used to fix the end of the rotating shaft.

[0007] As a preferred embodiment, the high-ratio gear set includes a large gear and a small gear that mesh with each other. The output end of the worm gear reducer is coaxially connected to the small gear. The worm gear reducer drives the shaft clamping assembly and the rotating shaft to rotate through the meshing transmission of the small gear and the large gear.

[0008] As a preferred embodiment, the power input end of the worm gear reducer is connected to a hand crank.

[0009] As a preferred embodiment, the worm gear reducer is a self-locking worm gear mechanism, wherein the lead angle of the worm is smaller than the equivalent friction angle of the worm wheel.

[0010] As a preferred embodiment, one end of the rotating shaft is fixed between the lower base and the upper cover plate, and the other end is connected to the workpiece clamping assembly.

[0011] As a preferred embodiment, the rotating shaft adopts a square shaft structure that is adapted to the square positioning hole.

[0012] As a preferred embodiment, the lower base and the upper cover are bolted together.

[0013] As a preferred embodiment, the telescopic beam base sleeve telescopic structure has a telescopic length that is less than half the total length of the telescopic beam base, and is used for axial length adjustment to adapt to workpieces of different sizes.

[0014] Based on the above technical solution, the beneficial effects of this utility model are:

[0015] 1. This utility model achieves high-precision angle control and arbitrary position self-locking for large parts through the coordinated transmission of a worm gear reducer and a high-ratio gear set. The first-stage reduction and torque amplification of the worm gear mechanism, combined with the second-stage reduction of the gear set, enables the workpiece to slowly rotate at a small angle, significantly improving positioning accuracy and meeting the precise requirements of non-standard angles such as 37° and 128°.

[0016] 2. This utility model achieves a self-locking function by controlling the lead angle of the worm and the equivalent friction angle of the worm wheel in the worm gear reducer, ensuring stable locking without the need for an additional braking device during the flipping process and avoiding the risk of load slippage.

[0017] 3. This utility model adopts a modular clamping design, using a matching structure of the lower base and the upper cover plate to fix one end of the rotating shaft, while the other end of the rotating shaft can be connected to replace workpiece clamping components of different specifications. Combined with the axial length adjustment function of the telescopic beam base, it achieves compatibility with workpieces of different sizes and irregular shapes, greatly improving the versatility of the flipping mechanism. Attached Figure Description

[0018] Figure 1 This is the front view of the present invention;

[0019] Figure 2 This is the left view of the present invention;

[0020] Figure 3 This is a structural schematic diagram from another perspective of the present invention;

[0021] Figure 4 This is a schematic diagram of the installation of this utility model.

[0022] The markings in the diagram are: 1. Worm gear reducer, 2. Support bracket, 201. First support bracket, 202. Second support bracket, 3. Telescopic beam base, 4. High speed ratio gear set, 5. Lower base, 501. First lower base, 502. Second lower base, 6. Upper cover plate, 601. First upper cover plate, 602. Second upper cover plate, 7. Rotating shaft, 8. Hand crank. Detailed Implementation

[0023] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0024] The structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and purposes that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0025] It should also be noted that, unless otherwise stated, the terms "upper," "lower," "left," "right," "front end," "rear end," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered as within the scope of implementation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] like Figure 1 As shown, a part flipping mechanism with self-locking function includes a worm gear reducer 1, a bracket 2, a telescopic beam base 3, a high-ratio gear set 4, a lower base 5, an upper cover plate 6, a rotating shaft 7, and a hand crank 8.

[0027] In this embodiment, according to the application scenario definition of this application: a single-stage speed ratio ≥3:1 is a large speed ratio, and the large speed ratio gear set adopts a tooth ratio configuration of 95:24.

[0028] The telescopic beam base 3 adopts a sleeve-type telescopic structure, and its telescopic length is less than half of the total length of the telescopic beam base 3, which is used to adjust the length axially to adapt to workpieces of different sizes. The telescopic beam base 3 is provided with supports 2 at both ends vertically. The supports 2 include a first support 201 and a second support 202 arranged in parallel. The first support 201, the second support 202 and the telescopic beam base 3 form a U-shaped integral frame.

[0029] The lower base 5 includes a first lower base 501 and a second lower base 502; the upper cover 6 includes a first upper cover 601 and a second upper cover 602.

[0030] The first bracket 201 has a worm gear reducer 1 on its outer side and a high-ratio gear set 4 on its inner side. The worm gear of the worm gear reducer 1 and the gear of the high-ratio gear set 4 cooperate to realize power transmission. The shaft clamping assembly includes an active end and a driven end. The active end includes a first lower base 501 connected to the high-ratio gear set 4 and a matching detachable first upper cover plate 601. The driven end includes a second lower base 502 and a second upper cover plate 602 disposed on the second bracket 202.

[0031] The first lower base 501 and the first upper cover 601, and the second lower base 502 and the second upper cover 602 are all provided with mutually cooperating square positioning holes. The square positioning holes are used to fix the end of the rotating shaft 7. Specifically, the rotating shaft 7 adopts a square shaft structure that is adapted to the square positioning holes, and axial positioning and torque transmission are achieved through the square fit.

[0032] In this embodiment, the lower base 5 and the upper cover plate 6 are bolted together.

[0033] One end of the rotating shaft 7 is fixed between the lower base 5 and the upper cover plate 6, and the other end is equipped with a replaceable workpiece clamping assembly. The workpiece clamping assembly can be selected according to the shape characteristics of the workpiece to be flipped, such as an I-shaped clamping assembly or a four-corner clamping assembly.

[0034] The high-ratio gear set 4 includes a large gear and a small gear that mesh with each other. The output end of the worm gear reducer 1 is coaxially connected to the small gear. The worm gear reducer 1 drives the shaft clamping assembly and the rotating shaft 7 to rotate through the meshing transmission of the small gear and the large gear. Specifically, the worm gear reducer 1 is a self-locking worm gear mechanism, and the lead angle of the worm is less than the equivalent friction angle.

[0035] The power input end of the worm gear reducer 1 is connected to the hand crank 8.

[0036] Working principle:

[0037] like Figure 4 As shown, when using the flipping mechanism, firstly, adjust the length of the telescopic beam 3 to a suitable position according to the external dimensions of the part to be flipped; then, install one end of each of the two workpiece clamping assemblies on both ends of the part to be flipped, and reliably connect the other ends of the two workpiece clamping assemblies to one end of each of the two support shafts 7; then, accurately place the other ends of the two support shafts 7 on the first lower base 501 and the second lower base 502, and after covering the first upper cover 601 and the second upper cover 602 respectively, use bolts to connect and tighten the first lower base 501 and the first upper cover 601, the second lower base 502 and the second upper cover 602 to complete the workpiece clamping.

[0038] During the flipping operation, the operator drives the worm of the worm gear reducer 1 to rotate by turning the hand crank 8. The worm drives the worm wheel to rotate, achieving the first-stage reduction. Then, the worm wheel transmits power to the pinion of the high-ratio gear set 4, and the second-stage reduction is achieved through the meshing transmission between the pinion and the large gear. Since the large gear is coaxially fixedly connected to the first lower base 501, the rotation of the large gear directly drives the first lower base 501 and the first upper cover plate 601 to rotate synchronously, thereby driving the rotating shaft 7 and the parts to be flipped to achieve a smooth and controllable flipping motion.

[0039] This mechanism, through a two-stage reduction system of worm gear machine 1 and high-ratio gear set 4, not only achieves slow rotation of the part to be flipped and precise control of the required flipping angle, but also, with the help of the self-locking function of worm gear machine 1 (lead angle < equivalent friction angle), can automatically lock at any angle, ensuring the safety and reliability of the flipping process.

[0040] It should be noted that the above embodiments are only used to illustrate the present utility model, but the present utility model is not limited to the above embodiments. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A part flipping mechanism with a self-locking function, characterized in that: It includes a telescopic beam base (3), a shaft clamping assembly, and a rotating shaft (7); the telescopic beam base (3) has vertical supports (2) at both ends to form a U-shaped overall frame. The supports (2) include a first support (201) and a second support (202) arranged in parallel. The first support (201) has a worm gear reducer (1) on its outer side and a high-ratio gear set (4) on its inner side. The worm wheel of the worm gear reducer (1) and the gear of the high-ratio gear set (4) cooperate to realize power transmission. The shaft clamping assembly includes an active end and a driven end. The active end includes a first lower base (501) connected to the high-ratio gear set (4) and a matching detachable first upper cover plate (601). The driven end includes a second lower base (502) set on the second bracket (202) and a matching detachable second upper cover plate (602). The first lower base (501) and the first upper cover plate (601), and the second lower base (502) and the second upper cover plate (602) are all provided with mutually cooperating square positioning holes. The square positioning holes are used to fix the end of the rotating shaft (7).

2. The part flipping mechanism with self-locking function according to claim 1, characterized in that: The high-ratio gear set (4) includes a large gear and a small gear that mesh with each other. The worm output end of the worm gear reducer (1) is coaxially connected to the small gear. The worm gear reducer (1) drives the shaft clamping assembly and the rotating shaft (7) to rotate through the meshing transmission of the small gear and the large gear.

3. A part flipping mechanism with self-locking function according to claim 2, characterized in that: The power input end of the worm gear reducer (1) is connected to a hand crank (8).

4. A part flipping mechanism with self-locking function according to claim 3, characterized in that: The worm gear reducer (1) is a self-locking worm gear mechanism, and the lead angle of the worm is smaller than the equivalent friction angle of the worm wheel.

5. A part flipping mechanism with self-locking function according to claim 1, characterized in that: One end of the rotating shaft (7) is fixed between the lower base (5) and the upper cover plate (6), and the other end is connected to the workpiece clamping assembly.

6. A part flipping mechanism with self-locking function according to claim 5, characterized in that: The rotating shaft (7) adopts a square shaft structure that is compatible with the square positioning hole.

7. A part flipping mechanism with self-locking function according to claim 5, characterized in that: The lower base (5) and the upper cover plate (6) are bolted together.

8. A part flipping mechanism with self-locking function according to claim 1, characterized in that: The telescopic beam base (3) has a sleeve-type telescopic structure, and its telescopic length is less than half of the total length of the telescopic beam base (3). It is used to adjust the length axially to adapt to workpieces of different sizes.

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