Lifting mechanism

Abstract

The utility model discloses a lifting mechanism which is characterized in that the lifting mechanism comprises a supporting frame, a lifting frame is movably connected in the supporting frame, guide columns are arranged at the two ends of the lifting frame, and the two opposite side faces of the guide columns are connected with the supporting frame in a sliding mode through longitudinal sliding rail and sliding block mechanisms. A supporting platform is arranged on the top end faces of the guide columns, a horizontally-distributed driving air cylinder is arranged on one guide column, the working end of the driving air cylinder is hinged to a driving sliding table, and the driving sliding table is in sliding connection with the top end face of the lifting frame through a horizontal sliding rail and sliding block mechanism. Supporting frames which are symmetrically distributed are arranged on the two sides of the bottom end face of the driving sliding table, guide rolling wheels are rotationally supported at the bottom ends of the supporting frames, guide grooves are formed in the side walls of the supporting frames, and the guide rolling wheels are connected into the corresponding guide grooves in a rolling mode. The guide groove is composed of a bottom horizontal section, an inclined section and a top horizontal section which are sequentially connected.

Description

Technical Field

[0001] The utility model relates to the field of machining, in particular to a lifting mechanism. Background Art

[0002] In the production and assembly process of industrial products, it is often necessary to use a lifting mechanism to lift a workpiece from a low place to a high place (or transport it from a high place to a low place). The traditional lifting mechanism directly drives a longitudinal moving platform through a longitudinally arranged air cylinder or oil cylinder. However, after the workpiece is lifted to a high place by such a lifting mechanism, it is necessary to keep the air cylinder or oil cylinder pressurized to keep the workpiece staying at the current height all the time. Once there is a problem with the air circuit or oil circuit system, the workpiece may fall rapidly, posing a certain safety hazard.

[0003] Although the above problems can be solved by setting up a set of mechanical locking mechanisms, the mechanical locking mechanisms still need to be driven by an oil cylinder or an air cylinder to achieve the locking or unlocking actions, which will lead to a relatively complex overall structure of the lifting mechanism, and the manufacturing cost and maintenance cost will also increase accordingly.

[0004] Therefore, there is a need for a method or device that can solve the above problems now. Summary of the Invention

[0005] The utility model is proposed to solve the above-mentioned deficiencies existing in the prior art, and provides a lifting mechanism with a simple structure, ingenious design, reasonable layout, low cost, and does not require an oil cylinder or an air cylinder to maintain pressure after lifting in place, thereby eliminating potential safety hazards.

[0006] The technical solution of the utility model is: a lifting mechanism, characterized in that: the lifting mechanism includes a support frame 1, a lifting frame 2 is movably connected in the support frame 1, guide columns 3 are arranged at both ends of the lifting frame 2, and two opposite side surfaces of the guide columns 3 are slidably connected with the support frame 1 through a longitudinal slide rail-slider mechanism 4, and the top surface of the guide column 3 is a support platform 5.

[0007] A horizontally distributed driving air cylinder 6 is arranged on one of the guide columns 3, the working end of the driving air cylinder 6 is hinged with a driving slide 7, and the driving slide 7 is slidably connected with the top surface of the lifting frame 2 through a horizontal slide rail-slider mechanism 8.

[0008] Symmetrically distributed support frames 9 are arranged on both sides of the bottom end surface of the driving slide 7, guide rollers 10 are rotatably supported at the bottom ends of the support frames 9, a guide groove 11 is formed on the side wall of the support frame 1, and the guide rollers 10 are rollingly connected in the corresponding guide grooves 11.

[0009] The guide groove 11 is composed of three parts: a bottom horizontal section 12, an inclined section 13, and a top horizontal section 14 which are connected in sequence.

[0010] The slide rail and the slider in the horizontal slide rail slider mechanism 8 are of dovetail groove structure.

[0011] Compared with the prior art, the utility model has the following advantages:

[0012] For the lifting mechanism with this structural form, its structure is simple, the design is ingenious, and the layout is reasonable. After the traditional lifting mechanism directly uses longitudinally distributed oil cylinders or air cylinders to achieve lifting, it needs to perform a pressure maintaining action to ensure that the lifted heavy object always remains at a high position, thus having certain potential safety hazards. A special structure is designed. It uses a horizontally distributed air cylinder as the driving mechanism to drive the driving slide table to move in the horizontal direction, and the guiding rollers at the bottom end of the driving slide table are rollingly connected in the guiding groove. Under the action of the inclined section on the guiding groove, the above horizontal movement is converted into a vertical movement, so as to realize the lifting action of the heavy object. Moreover, when lifted to the specified height, the guiding rollers just move to the top horizontal section of the guiding groove, that is, the lifting frame is directly supported by the support frame, and the air cylinder does not need to directly bear the weight of the heavy object. Therefore, compared with the traditional mechanism, its safety is greatly improved. And the manufacturing process of this lifting mechanism is simple, and the manufacturing cost is low. Therefore, it can be said that it has multiple advantages and is particularly suitable for popularization and application in this field, and its market prospect is very broad. Description of the Drawings

[0013] Figure 1 is a three-dimensional structural schematic diagram of an embodiment of the utility model.

[0014] Figure 2 is the front view of an embodiment of the utility model (working state one).

[0015] Figure 3 is the front view of an embodiment of the utility model (working state two). Detailed Embodiment

[0016] The following will describe the detailed embodiment of the utility model in conjunction with the drawings. As Figures 1 to 3 shown: A lifting mechanism includes a support frame 1 as a foundation. An elevating frame 2 is movably connected within the support frame 1. Guide columns 3 are provided at both ends of the elevating frame 2. Two opposite side surfaces of the guide columns 3 are slidably connected to the support frame 1 through a longitudinal slide rail slider mechanism 4, and the top surface of the guide column 3 is a support platform 5.

[0017] A horizontally distributed driving air cylinder 6 is provided on one of the guide columns 3. The working end of the driving air cylinder 6 is hinged to a driving slide table 7. The driving slide table 7 is slidably connected to the top surface of the elevating frame 2 through a horizontal slide rail slider mechanism 8.

[0018] On both sides of the bottom end face of the driving slide table 7, symmetrically distributed support frames 9 are provided. At the bottom end of the support frame 9, a guiding roller 10 is rotatably supported. A guiding groove 11 is formed on the side wall of the support frame 1. The guiding roller 10 is in rolling connection with the corresponding guiding groove 11.

[0019] The guiding groove 11 is composed of three parts: a bottom horizontal section 12, an inclined section 13, and a top horizontal section 14 that are connected in sequence.

[0020] The slide rail and the slider in the horizontal slide rail slider mechanism 8 are of a dovetail groove structure.

[0021] The working process of the lifting mechanism in the embodiment of the present utility model is as follows: Place the workpiece to be lifted on the tray, and the tray is supported by the support platforms 5 at the tops of the two guiding columns 3. In the initial state, the workpiece is at a relatively low position, and the guiding roller 10 is located in the bottom horizontal section 12.

[0022] When it is necessary to use this mechanism to lift the workpiece, a signal is sent to the driving cylinder 6 through the control system. The working end of the driving cylinder 6 retracts, driving the driving slide table 7 to move horizontally on the top end face of the lifting frame 2.

[0023] When the driving slide table 7 makes a horizontal linear motion relative to the lifting frame 2, since the lifting frame 2 and the support frame 1 are relatively fixed in the horizontal direction, the driving slide table 7 will make a horizontal linear motion relative to the support frame 1. At this time, the guiding roller 10 at the bottom end of the driving slide table 7 will roll in the guiding groove 11. Under the action of the inclined section 13, the driving slide table 7 as a whole will move upward. Since the horizontal slide rail slider mechanism 8 between the driving slide table 7 and the lifting frame 2 is of a dovetail groove structure, that is, the end face of the slide rail is an inverted trapezoid, and the chute on the slider is also an inverted trapezoid that matches it, the upward movement of the driving slide table 7 will drive the lifting frame 2 as a whole to move upward relative to the support frame 1. After the guiding roller 10 enters the top horizontal section 14, the bottom plate of the top horizontal section 14 supports the guiding roller 10. At this time, the weight of the lifting frame 2 is transmitted to the support frame 1 through the support frame 9 and the guiding roller 10, that is, the support frame 1 supports the lifting frame 2 and the workpiece thereon. The horizontally distributed driving cylinders 6 do not bear the pressure from the workpiece, and they only need to keep the driving slide table 7 at the current horizontal position.

[0024] When it is necessary to let the workpiece fall, the driving cylinder 6 drives the driving slide table 7 to move in the reverse direction until the guiding roller 10 returns to the bottom horizontal section 12 again, and the lifting frame 2 returns to the initial height (relatively low position) to wait for the next lifting operation.

Claims

1. A lifting mechanism, characterized in that: The lifting mechanism described above includes a support frame (1), within which a lifting frame (2) is movably connected. Guide columns (3) are provided at both ends of the lifting frame (2). Two opposite side surfaces of the guide columns (3) are slidably connected to the support frame (1) through a longitudinal slide rail-slider mechanism (4), and the top surface of the guide column (3) is a support platform (5). A horizontally distributed driving cylinder (6) is provided on one of the guide columns (3). The working end of the driving cylinder (6) is hinged to a driving slide (7), and the driving slide (7) is slidably connected to the top surface of the lifting frame (2) through a horizontal slide rail-slider mechanism (8). Symmetrically distributed support frames (9) are provided on both sides of the bottom end surface of the driving slide (7). Guide rollers (10) are rotatably supported at the bottom ends of the support frames (9). A guide groove (11) is formed in the side wall of the support frame (1), and the guide rollers (10) are rollingly connected in the corresponding guide groove (11). The guide groove (11) is composed of three parts: a bottom horizontal section (12), an inclined section (13), and a top horizontal section (14) connected in sequence.

2. The lifting mechanism according to claim 1, characterized in that: The slide rail and the slider in the horizontal slide rail-slider mechanism (8) have a dovetail groove structure.

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