Rack-driven vertical lifting mechanism

Abstract

The utility model relates to the technical field of lifting mechanisms, and particularly discloses a rack-driven vertical lifting mechanism. Comprising a first lifting mechanism and a second lifting mechanism, the second lifting mechanism comprises a lifting frame, a transmission wheel, a flexible assembly, a second sliding table, a gear and a rack, the lifting frame is vertically and fixedly installed on the first sliding table of the first lifting mechanism, and two linear rails are vertically and fixedly installed on the lifting frame; more than two second sliding tables are arranged on the linear track in a reciprocating motion mode, two groups of transmission wheels are fixedly installed at the upper end and the lower end of the lifting frame respectively, a rack is vertically and fixedly installed on the base, the transmission wheel at the bottom is coaxially and fixedly connected with a gear, and the gear is connected with the rack in a meshed mode; the first lifting mechanism drives the second lifting mechanism to move up and down, the heights of the two lifting mechanisms are overlapped after lifting, the heights of the two lifting mechanisms are overlapped during descending, and the structure is stable; only one motor is needed to drive the two lifting mechanisms to ascend and descend simultaneously, and the operation speed is high.

Description

Technical field:

[0001] The utility model relates to the technical field of lifting mechanisms, in particular to a vertical lifting mechanism driven by a rack. Background technology:

[0002] Common pedestrian isolation guardrails consist of guardrail piles and isolation strips connecting the piles. The isolation strips are removed when release is needed and connected between two guardrails when blocking is needed. In areas with large pedestrian flow, frequent intermittent release is required, which is very inconvenient to operate.

[0003] Therefore, in order to facilitate operation, the traditional guardrail pile body is changed into a liftable pile body, the isolation belt is connected to the lifting mechanism of the pile body, and the guardrail pile body and the isolation belt are driven to rise and fall by a motor; however, the existing lifting guardrail can only lift the isolation belt between the pile bodies. In order to ensure the passage of people, a relatively high pile body is required, the structure is unstable, prone to failure, the use and manufacturing costs are relatively high, and the lifting stroke is long, and the operating speed during lifting is relatively slow. Utility model content:

[0004] The purpose of the utility model is to provide a rack-driven vertical lifting mechanism to solve the problems existing in the prior art.

[0005] The utility model is implemented by the following technical scheme: a vertical lifting mechanism with rack transmission, including a first lifting mechanism and a second lifting mechanism, the second lifting mechanism including a lifting frame, a transmission wheel, a flexible component, a second slide, a gear and a rack, the lifting frame is vertically fixedly installed on the first slide of the first lifting mechanism, two linear rails are vertically fixedly installed on the lifting frame, and more than two second slides are provided for reciprocating movement on the linear rails, two groups of transmission wheels are respectively fixedly installed at the upper and lower ends of the lifting frame, each group includes more than two transmission wheels with different diameters and coaxially connected, a flexible component is wound around the upper and lower transmission wheels with the same diameter, each second slide is fixedly connected to a flexible component, a rack is vertically fixedly installed on the base of the first lifting mechanism, the bottom transmission wheel is coaxially fixedly connected to the gear, and the gear is meshed with the rack.

[0006] Furthermore, the first lifting mechanism includes a base, a screw rod, a first slide and a motor. The base is vertically arranged, and two linear rails are vertically fixedly installed on the base. A first slide is provided for reciprocating movement on the linear rails. A motor is fixedly installed at one end of the base, and the output shaft of the motor is connected to one end of the screw rod. The other end of the screw rod is fixed to the other end of the base. The screw rod is arranged parallel to the linear rails, and the first slide is connected to the screw rod through a screw nut.

[0007] Furthermore, the transmission wheel is a pulley, and the flexible component is a belt.

[0008] Furthermore, the transmission wheel is a sprocket and the flexible component is a chain.

[0009] Furthermore, the transmission wheel is a guide wheel, and the flexible component is a flexible rope.

[0010] Furthermore, a slider is fixedly installed on the upper end of the base, and a linear track that moves along the slider is vertically fixedly installed on the back of the lifting frame.

[0011] The advantages of this utility model are as follows: the second lifting mechanism is driven by the first lifting mechanism to move up and down, and the heights of the two lifting mechanisms are superimposed after lifting, and overlapped when lowering, which is similar to the height of a conventional guardrail pile, and the stability is relatively good; at the same time, only one motor is required to drive the two lifting mechanisms to move up and down at the same time, and the lifting speed is relatively fast; and through different-sized transmission wheels, the moving speeds of the second slides are different, so that a certain distance can be left between the second slides when descending, which plays the function of isolating pedestrians. After rising, the second slides are closely arranged, so that the bottom second slide rises to a sufficient height for pedestrians to pass; further, a linear track and a slider are provided on the back of the lifting frame to ensure the overall structural strength of the second lifting mechanism during the lifting process, and the overall operation is more stable. Description of the drawings:

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0013] Figure 2 It is a structural schematic diagram of the first lifting mechanism.

[0014] Figure 3 It is a structural schematic diagram of the second lifting mechanism and the first lifting mechanism.

[0015] Figure 4 It is a schematic diagram of the local structure of the connection position between the slider and the lifting frame.

[0016] Figure 5 Schematic diagram of the connection between the flexible component and the second slide.

[0017] In the figure: it includes a first lifting mechanism 1, a second lifting mechanism 2, a base 101, a screw rod 102, a first slide 103, a motor 104, a slider 105, a lifting frame 201, a transmission wheel 202, a flexible component 203, a second slide 204, a gear 205, and a rack 206. Specific implementation method:

[0018] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on 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.

[0019] In the description of the present invention, it should be noted that the terms "center", "up", "down", "front", "back", "top", "bottom", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0020] like Figure 1 、 Figure 2 As shown: A rack-driven vertical lifting mechanism includes a first lifting mechanism 1 and a second lifting mechanism 2. The first lifting mechanism 1 includes a base 101, a screw rod 102, a first slide 103 and a motor 104. The base 101 is vertically arranged, and two linear rails are vertically fixedly installed on the base 101. A first slide 103 is provided for reciprocating movement on the linear rails. A motor 104 is fixedly installed at one end of the base 101, and the output shaft of the motor 104 is connected to one end of the screw rod 102. The other end of the screw rod 102 is fixed to the other end of the base 101. The screw rod 102 is arranged parallel to the linear rails. The first slide 103 is connected to the screw rod 102 through a screw nut. The first slide 103 can be lifted and lowered reciprocatingly along the linear rails on the base 101 under the drive of the motor 104.

[0021] like Figure 3 As shown: the second lifting mechanism 2 includes a lifting frame 201, a transmission wheel 202, a flexible component 203, a second slide 204, a gear 205 and a rack 206. The lifting frame 201 is vertically fixedly installed on the first slide 103 of the first lifting mechanism 1, and two linear rails are vertically fixedly installed on the lifting frame 201. More than two second slides 204 are provided for reciprocating movement on the linear rails. An isolation belt can be installed on the second slide 204. The second slide 204 can drive the isolation belt to rise and fall while rising and falling.

[0022] like Figure 4As shown: a slider 105 is fixedly installed on the upper end of the base 101, and a linear track that moves along the slider 105 is vertically fixedly installed on the back of the lifting frame 201. During the lifting and moving process of the lifting frame 201, the linear track on the back slides up and down in the slider 105, making the lifting frame 201 run more stably and enhancing the stability of the overall structure.

[0023] like Figure 5 As shown: two groups of transmission wheels 202 are fixedly installed at the upper and lower ends of the lifting frame 201, each group includes more than two transmission wheels 202 with different diameters and coaxially connected, and the transmission wheels 202 are arranged in sequence from small to large, and a flexible component 203 is wound around the upper and lower transmission wheels 202 with the same diameter, and each second slide 204 is fixedly connected to a flexible component 203, wherein the bottom second slide 204 is fixedly connected to the flexible component 203 wound on the transmission wheel 202 with the largest diameter, and the second slides 204 placed above the bottom second slide 204 are respectively connected in sequence with the flexible components 203 wound on the transmission wheels 202 with diameters from large to small; a rack 206 is vertically fixedly installed on the base 101 of the first lifting mechanism 1, and the bottom transmission wheel 202 is coaxially fixedly connected to a gear 205, and the gear 205 is meshed with the rack 206.

[0024] Working principle: When the first slide 103 drives the lifting frame 201 to move, the gear 205 coaxially connected to the bottom transmission wheel 202 rolls on the rack 206, thereby driving the bottom transmission wheel 202 to rotate, and at the same time driving the second slide 204 connected to each flexible component 203 to move up and down; since each transmission wheel 202 rotates coaxially, the flexible component 203 wound around the transmission wheel 202 with the largest diameter has the fastest linear speed, so the second slide 204 located at the bottom moves the fastest, and the movement speeds of other second slides 204 located above it decrease in sequence.

[0025] Therefore, according to the distance that each second slide 204 needs to move, different transmission wheels 202 with different matching diameters can be designed, thereby achieving: when the first slide 103 drives the lifting frame 201 to the lowest position, the second slides 204 are separated by a certain distance, and the isolation belts installed on the second slides 204 are also separated by a certain distance from each other, which plays the role of isolating pedestrians; when the first slide 103 drives the lifting frame 201 to rise to the highest position, due to the different moving speeds of the second slides 204, the distance between the second slides 204 gradually decreases. When reaching the highest position, the second slides 204 contact each other, and the top second slide 204 rises to the topmost position. At this time, the isolation belts installed on the second slides 204 are also the closest to each other, and the isolation belt at the bottom can be raised to a sufficient height for pedestrians to pass.

[0026] In the above structure, the transmission wheel 202 can be a pulley and the flexible component 203 can be a belt; or the transmission wheel 202 can be a sprocket and the flexible component 203 can be a chain; or the transmission wheel 202 can be a guide wheel and the flexible component 203 can be a flexible rope.

Claims

1. A rack-driven vertical lifting mechanism, characterized in that: The invention comprises a first lifting mechanism (1) and a second lifting mechanism (2), wherein the second lifting mechanism (2) comprises a lifting frame (201), a transmission wheel (202), a flexible component (203), a second slide (204), a gear (205) and a rack (206), wherein the lifting frame (201) is vertically fixedly installed on the first slide (103) of the first lifting mechanism (1), two linear rails are vertically fixedly installed on the lifting frame (201), two or more second slides (204) are reciprocatingly installed on the linear rails, and two or more second slides (204) are vertically fixedly installed on the lifting frame (201) Two groups of transmission wheels (202) are fixedly installed at the upper and lower ends respectively, each group includes two or more transmission wheels (202) with different diameters and coaxially connected, a flexible component (203) is wound around the upper and lower transmission wheels (202) with the same diameter, each second slide (204) is fixedly connected to a flexible component (203), a rack (206) is vertically fixedly installed on the base (101) of the first lifting mechanism (1), the transmission wheel (202) at the lower end is coaxially fixedly connected to a gear (205), and the gear (205) is meshed with the rack (206).

2. A rack-driven vertical lifting mechanism according to claim 1, characterized in that: The first lifting mechanism (1) comprises a base (101), a screw rod (102), a first slide (103) and a motor (104); the base (101) is vertically arranged; two linear rails are vertically fixedly installed on the base (101); a first slide (103) is provided for reciprocating movement on the linear rails; a motor (104) is fixedly installed at one end of the base (101); an output shaft of the motor (104) is connected to one end of the screw rod (102); the other end of the screw rod (102) is fixed to the other end of the base (101); the screw rod (102) is arranged parallel to the linear rails; and the first slide (103) is transmission-connected to the screw rod (102) via a screw nut.

3. The rack-driven vertical lifting mechanism according to claim 2, characterized in that: The transmission wheel (202) is a pulley, and the flexible component (203) is a belt.

4. The rack-driven vertical lifting mechanism according to claim 2, characterized in that: The transmission wheel (202) is a sprocket, and the flexible component (203) is a chain.

5. The rack-driven vertical lifting mechanism according to claim 2, characterized in that: The transmission wheel (202) is a guide wheel, and the flexible component (203) is a flexible rope.

6. A rack-driven vertical lifting mechanism according to any one of claims 2 to 5, characterized in that: A slider (105) is fixedly installed on the upper end of the base (101), and a linear track moving along the slider (105) is vertically fixedly installed on the back of the lifting frame (201).

Images