Mechanical lifting platform sinking locking mechanism

Abstract

The utility model discloses a mechanical lifting platform sinking locking mechanism which comprises a base, a lifting platform and a lifting mechanism located between the base and the lifting platform and further comprises a locking mechanism. The lifting mechanism comprises a lifting scissor arm and a driving structure for driving the lifting scissor arm to act; the lifting scissor arms comprise two groups of inner scissor arms and two groups of outer scissor arms, the inner scissor arms and the outer scissor arms are symmetrically arranged front and back, the middle parts of the inner scissor arms and the outer scissor arms are rotationally connected, the lower ends of the inner scissor arms are rotationally connected to the top of the horizontal moving seat, and the upper ends of the inner scissor arms are rotationally connected with the right side of the bottom of the lifting table; the lower end of the outer scissor arm is rotationally connected to the right side of the top of the base. The self-locking property of the trapezoidal lead screw is matched with the locking mechanism to prevent the lifting platform from sinking; meanwhile, when the lifting table needs to descend, the pawl is shifted reversely, and the locking mechanism cannot prevent the lifting table from descending normally.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of lifting platform, and specifically is a mechanical lifting platform sinking locking mechanism. BACKGROUND

[0002] The lifting platform is a multifunctional hoisting and unloading mechanical equipment, which can be divided into fixed type and mobile type: the mobile type is divided into straight arm type, curved arm type, scissor type, mast type, aluminum alloy lifting platform and sleeve cylinder type: the fixed type includes scissor type, guide rail type lifting platform, chain type lifting platform, loading and unloading platform and attached electric construction platform.

[0003] For example, the patent with the authorized announcement number CN222274052U discloses a kind of adjustable lift for taking things, it is related to lift technical field, including base, the top of base left and right sides is respectively provided with driving mechanism, the top of two driving mechanisms is respectively provided with scissor lifting fork arm, the top of scissor lifting fork arm is movably connected with object carrying table, the top of object carrying table is equidistantly arrayed with several rolling assemblies, the top of object carrying table is fixedly connected with guardrail, the front side top of object carrying table is provided with limiting mechanism, the bottom of base is fixedly connected with four universal wheels in rectangular array, the top of base front and back sides is respectively provided with stabilizing mechanism, and the bottom of stabilizing mechanism penetrates to the bottom of base.

[0004] The above-mentioned patent sets up rolling assembly, when carrying goods, the drum will speed up the movement of goods, save time and effort, the limiting mechanism is fixed by turning upward along the connecting groove and the clamping groove, the object carrying table is positioned, and the goods is prevented from sliding out of the object carrying table;But the above-mentioned patent has the following shortcomings: when the object carrying table is in high position, the driving motor of driving mechanism needs to be locked, so that the object carrying table cannot sink, if the driving motor fails, the object carrying table will sink immediately, and safety accident is prone to occur.

[0005] Therefore, it is necessary to improve such a structure to overcome the above-mentioned defects. UTILITY MODEL CONTENTS

[0006] The utility model aims at providing mechanical lifting platform sinking locking mechanism to solve the problems in the above background.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0008] The mechanical lifting platform sinking locking mechanism comprises a base, a lifting platform, a lifting mechanism between the base and the lifting platform, and a locking mechanism; the lifting mechanism comprises lifting scissors arms and a driving structure for driving the lifting scissors arms to act; the lifting scissors arms comprise inner scissors arms and outer scissors arms, two groups of the inner scissors arms and the outer scissors arms are symmetrically arranged front and back, the middle parts of the inner scissors arms and the outer scissors arms are rotationally connected, the lower ends of the inner scissors arms are rotationally connected to the top of a horizontal moving seat, the upper ends of the inner scissors arms are rotationally connected to the bottom right side of the lifting platform, the lower ends of the outer scissors arms are rotationally connected to the top right side of the base, the upper ends of the two groups of outer scissors arms are fixedly connected with sliding shafts, the sliding shafts are slidingly arranged in sliding grooves, the sliding grooves are fixedly installed on the bottom left side of the lifting platform, the horizontal moving seat is in transmission connection with the driving structure, the driving structure comprises a lifting motor, a trapezoidal lead screw and a guide structure, the lifting motor is drivingly connected with the trapezoidal lead screw, the trapezoidal lead screw is in transmission connection with the horizontal moving seat, the lifting motor is fixedly installed on the top of the base, and the locking mechanism is fixedly installed on the top left side of the base.

[0009] Further, the top right side of the horizontal moving seat is fixedly provided with a first rotary connecting seat, and the lower end of the inner scissors arm is rotationally connected with the first rotary connecting seat through a rotating shaft.

[0010] Further, the bottom right side of the lifting platform is fixedly provided with a second rotary connecting seat, and the upper end of the inner scissors arm is rotationally connected with the second rotary connecting seat through a rotating shaft.

[0011] Further, the top right side of the base is fixedly provided with a third rotary connecting seat, and the lower end of the outer scissors arm is rotationally connected with the third rotary connecting seat through a rotating shaft.

[0012] Further, the trapezoidal lead screw comprises a trapezoidal lead screw and a screw nut in meshing with each other, the trapezoidal lead screw is rotationally connected to the top of the base through two bearing seats, the right end of the trapezoidal lead screw is in transmission connection with the output shaft of the lifting motor through one of the bearing seats, the screw nut is fixedly installed in a nut seat, and the nut seat is fixedly installed on the bottom of the horizontal moving seat.

[0013] Further, the guide structure comprises an optical shaft and a linear bearing, the two ends of the optical shaft are fixedly installed on the top of the base through an axle support seat, the linear bearing is slidingly sleeved on the optical shaft, and the linear bearing is fixedly installed on the bottom of the horizontal moving seat.

[0014] Further, the locking mechanism comprises a locking seat, a ratchet wheel and a pawl; the locking seat is provided with a ratchet wheel accommodating groove along the left-right direction, the right end and the top of the ratchet wheel accommodating groove are open, the left end of the trapezoidal lead screw of the trapezoidal lead screw is fixedly connected with the ratchet wheel through a bearing seat, the ratchet wheel is located in the ratchet wheel accommodating groove, the top right side of the locking seat is rotationally connected with the pawl through a rotating shaft, and the pawl is in contact with the ratchet wheel.

[0015] Compared with the prior art, the utility model has the beneficial effects that:

[0016] The self-locking cooperation locking mechanism of the trapezoidal screw rod prevents the lifting platform from sinking, and when the lifting platform needs to be lowered, the ratchet pawl is reversed to drive, and the locking mechanism does not prevent the lifting platform from normally descending. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a structural schematic view of the sinking locking mechanism of the mechanical lifting platform.

[0018] Figure 2 It is a front view of the sinking locking mechanism of the mechanical lifting platform.

[0019] Figure 3 It is a side view of the sinking locking mechanism of the mechanical lifting platform.

[0020] Figure 4 It is a top view of the sinking locking mechanism of the mechanical lifting platform.

[0021] Figure 5 It is a structural schematic view of the sinking locking mechanism of the mechanical lifting platform after removing part of the structure.

[0022] Figure 6 It is a top view of the sinking locking mechanism of the mechanical lifting platform after removing part of the structure.

[0023] Figure 7 It is a structural schematic view of the locking mechanism in the sinking locking mechanism of the mechanical lifting platform.

[0024] Figure 8 It is a structural schematic view of the locking mechanism in the sinking locking mechanism of the mechanical lifting platform after reversing the ratchet pawl. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model below. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. The components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the claimed utility model, but only represents selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0026] Please refer to Figures 1-7The mechanical lifting platform sinking locking mechanism comprises a base 1, a lifting platform 2, a lifting mechanism 3 between the base 1 and the lifting platform 2, and a locking mechanism 4;

[0027] The lifting mechanism 3 comprises lifting scissors arms 301 and a driving structure 302 for driving the lifting scissors arms 301 to act;

[0028] In the scheme, the lifting scissors arms 301 comprise inner scissors arms 303 and outer scissors arms 304, the inner scissors arms 303 and the outer scissors arms 304 are provided with two groups and are symmetrically arranged front and back, the middle parts of the inner scissors arms 303 and the outer scissors arms 304 are rotationally connected,

[0029] The lower end of the inner scissors arm 303 is rotationally connected to the top of a horizontal moving seat 305, specifically, a first rotational connecting seat 3051 is fixedly arranged at the right side of the top of the horizontal moving seat 305, and the lower end of the inner scissors arm 303 is rotationally connected to the first rotational connecting seat 3051 through a rotating shaft; the upper end of the inner scissors arm 303 is rotationally connected to the right side of the bottom of the lifting platform 2, specifically, a second rotational connecting seat 201 is fixedly arranged at the right side of the bottom of the lifting platform 2, and the upper end of the inner scissors arm 303 is rotationally connected to the second rotational connecting seat 201 through a rotating shaft;

[0030] The lower end of the outer scissors arm 304 is rotationally connected to the right side of the top of the base 1, specifically, a third rotational connecting seat 101 is fixedly arranged at the right side of the top of the base 1, and the lower end of the outer scissors arm 304 is rotationally connected to the third rotational connecting seat 101 through a rotating shaft; the upper ends of the two groups of outer scissors arms 304 are fixedly connected with a sliding shaft 306, the sliding shaft 306 is slidingly arranged in a sliding groove 307, and the sliding groove 307 is fixedly installed at the left side of the bottom of the lifting platform 2;

[0031] In the scheme, the horizontal moving seat 305 is in transmission connection with the driving structure 302;

[0032] The driving structure 302 is driven to move left and right by the horizontal moving seat 305, when the horizontal moving seat 305 moves to the right, the lower end of the inner scissors arm 303 moves to the right, at this time, the upper end of the outer scissors arm 304 moves to the right along the sliding groove 307, at this time, the lifting scissors arms 301 are opened, and the lifting platform 2 rises;

[0033] In the scheme, the driving structure 302 includes a lifting motor 310, a trapezoidal screw 320 and a guide structure 330; the trapezoidal screw 320 has the advantages of self-locking (the thread angle of the trapezoidal screw is designed to be smaller than the static friction angle of the screw pair, which means that the friction between the screw and the nut can prevent the relative reverse rotation of the screw when subjected to axial load), that is, the screw nut of the trapezoidal screw 320 can prevent the screw from rotating, and the auxiliary locking mechanism 4 can play a locking effect;

[0034] The lifting motor 310 is drivingly connected with the trapezoidal screw 320, and the trapezoidal screw 320 is drivingly connected with the horizontal moving seat 305;

[0035] The lifting motor 310 is fixedly installed on the top of the base 1;

[0036] Specifically, the trapezoidal screw 320 includes a trapezoidal screw 321 and a screw nut 322 which are in mesh with each other, the trapezoidal screw 321 is rotatably connected to the top of the base 1 through two bearing seats 323, the right end of the trapezoidal screw 321 penetrates through one of the bearing seats 323 and is drivingly connected with the output shaft of the lifting motor 310, the screw nut 322 is fixedly installed in a nut seat 324, and the nut seat 324 is fixedly installed at the bottom of the horizontal moving seat 305;

[0037] The guide structure 330 includes an optical axis 331 and a linear bearing 332, both ends of the optical axis 331 are fixedly installed on the top of the base 1 through an axle support seat 333, the linear bearing 332 is slidably sleeved on the optical axis 331, and the linear bearing 332 is fixedly installed at the bottom of the horizontal moving seat 305;

[0038] The locking mechanism 4 is fixedly installed on the top left side of the base 1, as shown in the drawing, Figure 7 The locking mechanism 4 includes a locking seat 401, a ratchet wheel 403 and a pawl 404; the locking seat 401 is provided with a ratchet wheel accommodating groove 402 in the left-right direction, and the right end and the top of the ratchet wheel accommodating groove 402 are open; the left end of the trapezoidal screw 321 of the trapezoidal screw 320 penetrates through the bearing seat 323 and is fixedly connected with the ratchet wheel 403, and the ratchet wheel 403 is located in the ratchet wheel accommodating groove 402; the pawl 404 is rotatably connected to the top right side of the locking seat 401 through a rotating shaft; the pawl 404 is in contact with the ratchet wheel 403;

[0039] When the utility model is used, the lifting motor 310 of the driving structure 302 drives the horizontal moving seat 305 to move to the right through the trapezoidal screw 320, at this time, the lifting scissor arm 301 is opened, and the lifting platform 2 rises;

[0040] At this time, the trapezoidal screw 321 of the trapezoidal screw 320 rotates forward, and the ratchet fixed at the left end of the trapezoidal screw 321 will not be stuck by the pawl 404.

[0041] When the lifting platform 2 is under pressure, the self-locking property of the trapezoidal screw 320 will prevent the screw nut from moving. If the self-locking of the trapezoidal screw 320 fails, the nut will move and the trapezoidal screw 321 will reverse. At this time, the pawl 404 will prevent the ratchet from reversing, thereby locking the position of the lifting platform 2 and preventing it from sinking.

[0042] When the lifting platform 2 needs to be lowered, at this time... Figure 8 As shown, when the pawl 404 is moved in the opposite direction, the pawl 404 will not get stuck in either direction.

[0043] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "left," and "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, terms such as "set" and "connect" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

Claims

1. A sinking locking mechanism of a mechanical lifting platform, comprising a base, a lifting platform and a lifting mechanism between the base and the lifting platform, characterized in that, Also include locking mechanism; the lifting mechanism includes lifting scissors arms and driving structure for driving lifting scissors arms action; the lifting scissors arms include inner scissors arms and outer scissors arms, and the inner scissors arms and the outer scissors arms are provided with two groups and are arranged symmetrically front and back, the middle parts of the inner scissors arms and the outer scissors arms are rotatably connected, the lower end of the inner scissors arms is rotatably connected on the top of the horizontal moving seat, and the upper end of the inner scissors arms is rotatably connected with the bottom right side of the lifting platform; the lower end of the outer scissors arms is rotatably connected on the top right side of the base; the upper end of the two groups of outer scissors arms is fixedly connected with sliding shafts, the sliding shafts are slidably arranged in sliding grooves, and the sliding grooves are fixedly installed on the bottom left side of the lifting platform; the horizontal moving seat is in transmission connection with the driving structure; the driving structure includes a lifting motor, a trapezoidal lead screw and a guide structure; the lifting motor is drivingly connected with the trapezoidal lead screw, and the trapezoidal lead screw is in transmission connection with the horizontal moving seat; the lifting motor is fixedly installed on the top of the base; and the locking mechanism is fixedly installed on the top left side of the base.

2. The mechanical lift landing gear descent locking mechanism of claim 1, wherein, The top right side of the horizontal moving seat is fixedly provided with a first rotary connecting seat, and the lower end of the inner scissors arms is rotatably connected with the first rotary connecting seat through a rotating shaft.

3. The mechanical lift landing gear descent locking mechanism of claim 2, wherein, The bottom right side of the lifting platform is fixedly provided with a second rotary connecting seat, and the upper end of the inner scissors arms is rotatably connected with the second rotary connecting seat through a rotating shaft.

4. The mechanical lift landing gear descent locking mechanism of claim 3, wherein, The top right side of the base is fixedly provided with a third rotary connecting seat, and the lower end of the outer scissors arms is rotatably connected with the third rotary connecting seat through a rotating shaft.

5. The mechanical lift landing gear descent locking mechanism of claim 1, wherein, The trapezoidal lead screw includes a trapezoidal lead screw and a screw nut in mesh with each other, the trapezoidal lead screw is rotatably connected on the top of the base through two bearing seats, the right end of the trapezoidal lead screw is in transmission connection with the output shaft of the lifting motor through one of the bearing seats, the screw nut is fixedly installed in a nut seat, and the nut seat is fixedly installed on the bottom of the horizontal moving seat.

6. The mechanical lift landing gear descent locking mechanism of claim 1, wherein, The guide structure includes an optical shaft and a linear bearing, both ends of the optical shaft are fixedly installed on the top of the base through an axle support seat, the linear bearing is slidably sleeved on the optical shaft, and the linear bearing is fixedly installed on the bottom of the horizontal moving seat.

7. The mechanical lift landing gear descent locking mechanism of claim 5, wherein, The locking mechanism includes a locking seat, a ratchet wheel and a pawl; the locking seat is provided with a ratchet wheel containing groove along the left-right direction, and the right end and the top of the ratchet wheel containing groove are open; the left end of the trapezoidal lead screw of the trapezoidal lead screw is fixedly connected with the ratchet wheel through a bearing seat, and the ratchet wheel is located in the ratchet wheel containing groove; the pawl is rotatably connected with the top right side of the locking seat through a rotating shaft; and the pawl is in contact with the ratchet wheel.

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