Electric shear fork jacking mechanism

Abstract

The utility model relates to an electric shear fork jacking mechanism which comprises a jacking platform, a jacking mounting plate, a shear fork mechanism and an electric mechanism, and the shear fork mechanism is connected between the jacking platform and the jacking mounting plate. The electric mechanism comprises a motor, a speed reducer, a lead screw assembly and a sliding assembly, the motor and the lead screw assembly are both arranged on the jacking mounting plate, and the motor is connected with a lead screw of the lead screw assembly through the speed reducer; the sliding assembly is connected with a nut of the lead screw assembly, and the sliding assembly is hinged to the shear fork mechanism. A group of lead screw assembly is matched with the sliding assembly to drive the fork rod of the shear fork mechanism to move, so that the lifting function of the jacking platform is realized, a hydraulic system is replaced, and the risk of hydraulic oil seepage is avoided. The mode of pushing the shear fork arms in the hydraulic shear fork mechanism is adjusted into the mode of driving the sliding assembly, the lead screw only provides pulling force, and the requirement for supporting the bottom of the lead screw is reduced. The stroke requirement corresponding to the lead screw is smaller, the structural space is more compact, the equipment structure is simple, the size is small, and flexibility is high.

Description

Technical Field

[0001] This utility model relates to the field of lifting equipment technology, and in particular to an electric scissor lift mechanism. Background Technology

[0002] Lifting equipment is a type of lifting device that raises and lowers goods to a set height. Existing lifting equipment typically uses electric push rods or hydraulic cylinders to raise or lower the platform.

[0003] The lifting mechanism used in heavy-duty mobile robots is typically a hydraulic lift, which uses a hydraulic pump and solenoid valve to control the cylinder stroke and achieve lifting. However, in some applications, there are issues such as the hydraulic oil affecting the working environment and the hydraulic structure generating significant noise. Screw jacks achieve lifting of heavy objects by using multiple screw lifting components and guide components, but they suffer from complex mechanisms, large size, and insufficient flexibility. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides an electric scissor lift mechanism.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, the electric scissor lift mechanism of this utility model includes a lift platform, a lift mounting plate, a scissor mechanism, and an electric mechanism, wherein the scissor mechanism is connected between the lift platform and the lift mounting plate;

[0008] The electric mechanism includes a motor, a reducer, a lead screw assembly, and a sliding assembly. The motor and the lead screw assembly are both mounted on the lifting mounting plate. The motor and the lead screw of the lead screw assembly are connected through the reducer. The sliding assembly is connected to the nut of the lead screw assembly and is hinged to the scissor mechanism.

[0009] Optionally, the sliding assembly includes a first sliding shaft and a power fork arm;

[0010] The first sliding shaft is slidably mounted on the lifting mounting plate and is hinged to the scissor fork mechanism; the first end of the power fork arm is connected to the first sliding shaft, and the second end of the power fork arm is connected to the nut of the lead screw assembly.

[0011] Optionally, the electric mechanism further includes a limiting bearing seat and a supporting bearing seat arranged sequentially along the axial direction of the lead screw assembly, with the supporting bearing seat close to the motor;

[0012] The limiting bearing housing is provided with a first bearing, and the supporting bearing housing is provided with a second bearing and a third bearing;

[0013] The lead screw assembly is sleeved in the first bearing, the second bearing, and the third bearing.

[0014] Optionally, the first bearing and the third bearing are angular contact ball bearings, and the second bearing is a thrust bearing.

[0015] Optionally, a gap is provided between the second end of the power fork arm and the nut of the lead screw assembly.

[0016] Optionally, the scissor mechanism includes a first fork, a second fork, a third fork, and a fourth fork;

[0017] The first fork is hinged to the second fork, and the third fork is hinged to the fourth fork;

[0018] The first end of the first fork and the third fork are hinged to the first sliding shaft, and the second end of the first fork and the third fork are hinged to the lifting platform;

[0019] The first ends of the second fork and the fourth fork are hinged to the lifting mounting plate, and a second sliding shaft is slidably provided on the bottom surface of the lifting platform. The second ends of the second fork and the fourth fork are both hinged to the second sliding shaft.

[0020] Optionally, reinforcing rods are connected between the first fork and the third fork, and between the second fork and the fourth fork.

[0021] Optionally, a limit block is provided on the lifting mounting plate, and the limit block is located directly below the first fork and the third fork.

[0022] Optionally, the motor is a servo motor.

[0023] (III) Beneficial Effects

[0024] This invention uses a set of lead screw components and sliding components to drive the fork of the scissor lift mechanism to move, thereby realizing the lifting function of the lifting platform, replacing the hydraulic system and eliminating the risk of hydraulic oil leakage;

[0025] The hydraulic scissor lift mechanism is changed from pushing the scissor arm to driving the sliding component. The lead screw only provides tension, reducing the need for support at the bottom of the lead screw and reducing the number of structural components.

[0026] The vertical movement of the lifting platform is driven by the lateral movement of the sliding component. Compared with the vertical or inclined lead screw, the force direction is changed, the stroke requirement of the lead screw is smaller, the structural space is more compact, the equipment structure is simple, the size is small, and the flexibility is high.

[0027] The motor amplifies its torque through a reducer and outputs it to the lead screw, thereby improving the load-bearing capacity of the lifting platform. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of the electric scissor lift mechanism of this utility model;

[0029] Figure 2 This is a schematic diagram of the installation of the limiting block of the electric scissor lift mechanism of this utility model;

[0030] Figure 3 This is a schematic diagram of the electric mechanism of the electric scissor lift mechanism of this utility model;

[0031] Figure 4 This is a partial cross-sectional schematic diagram of the electric scissor lift mechanism of this utility model.

[0032] [Explanation of Labels in the Attached Image]

[0033] 1: Scissor lift mechanism; 10: Scissor lift arm; 11: First sliding shaft; 12: Limit block; 13: Lifting mounting plate;

[0034] 2: Electric mechanism; 200: Lead screw; 201: Power fork arm; 202: Motor; 203: Nut; 204: Limit bearing housing; 205: Support bearing housing; 206: Reducer;

[0035] 210: First bearing; 211: Third bearing; 212: Second bearing; 213: Coupling. Detailed Implementation

[0036] To better explain and facilitate understanding of this utility model, a detailed description of its specific embodiments is provided below with reference to the accompanying drawings. In this document, directional terms such as "upper," "lower," etc., are used interchangeably with other directional terms. Figure 1 The orientation is used as a reference.

[0037] While exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present invention can be understood more clearly and thoroughly, and that the scope of the present invention can be fully conveyed to those skilled in the art.

[0038] like Figure 1 and Figure 2As shown, this utility model provides an electric scissor lift mechanism, which includes a lifting platform, a lifting mounting plate 13, a scissor mechanism 1, and an electric mechanism 2. The scissor mechanism 1 connects the lifting platform and the lifting mounting plate 13, and the lifting platform is raised or lowered by the rotation of two pairs of forks in the scissor mechanism 1. The electric mechanism 2 includes a motor 202, a reducer 206, a lead screw assembly, and a sliding assembly. The motor 202 is preferably a servo motor 202, and the lead screw assembly is preferably a ball screw assembly. Both the motor 202 and the lead screw assembly are mounted on the lifting mounting plate 13, preferably inside the scissor mechanism 1, to improve space utilization and reduce the size of the mechanism. The lead screw 200 of the lead screw assembly is rotatably mounted on the lifting mounting plate 13 via bearings. The motor 202 and the lead screw 200 of the lead screw assembly are connected by the reducer 206, and the torque of the motor 202 is amplified by the reducer 206 and output to the lead screw 200. The sliding assembly is connected to the nut 203 of the lead screw assembly. The nut 203 provides axial force to the sliding assembly. The sliding assembly is hinged to the scissor mechanism 1. The tension along the axial direction of the lead screw 200 on the sliding assembly acts on a pair of forks of the scissor mechanism 1, driving the forks to slide, thereby driving the lifting platform to rise and fall.

[0039] This invention uses a set of lead screw components and sliding components to drive the fork of the scissor lift mechanism 1, thereby realizing the lifting function of the lifting platform, replacing the hydraulic system and eliminating the risk of hydraulic oil leakage. The hydraulic scissor lift mechanism 1 is modified from pushing the scissor arm 10 to driving the sliding component. The lead screw 200 only provides tension, reducing the support required at the bottom of the lead screw 200 and reducing the number of structural components. The lateral movement of the sliding component drives the vertical movement of the lifting platform. Compared to a vertically or inclined lead screw, the force direction changes, the stroke requirement of the lead screw 200 is smaller, the structural space is more compact, the equipment structure is simple, the size is small, and the flexibility is high. The motor 202 amplifies the torque through the reducer 206 and outputs it to the lead screw 200, improving the load-bearing capacity of the lifting platform.

[0040] like Figure 3 As shown, the sliding assembly includes a first sliding shaft 11 and a power fork arm 201. Slide rails are provided on the lifting mounting plate 13 corresponding to both ends of the power fork arm 201, and the power fork arm 201 is slidably connected to the slide rails. The first sliding shaft 11 is hinged to two sets of scissor arms 10 of the scissor mechanism 1, and the two sets of scissor arms 10 move synchronously. The first end of the power fork arm 201 is connected to the first sliding shaft 11, and the second end of the power fork arm 201 is connected to the nut 203 of the lead screw assembly. When the lead screw 200 rotates, the nut 203 drives the first sliding shaft 11 to move axially along the lead screw 200 via the power fork arm 201.

[0041] Furthermore, such as Figure 4As shown, the electric mechanism 2 also includes a limiting bearing seat 204 and a supporting bearing seat 205 arranged sequentially along the axial direction of the lead screw assembly, with the supporting bearing seat 205 close to the motor 202. A first bearing 210 is housed in the limiting bearing seat 204, and a second bearing 212 and a third bearing 211 are housed in the supporting bearing seat 205. The lead screw 200 of the lead screw assembly is sleeved within the first bearing 210, the second bearing 212, and the third bearing 211. The first bearing 210 and the third bearing 211 are angular contact ball bearings, and the second bearing 212 is a thrust bearing. The lead screw 200 is fixed by the vertical support of the front and rear angular contact ball bearings, while axial load is supported by the thrust bearing. The lead screw 200 is mainly subjected to axial tensile force, with very little pressure in the vertical direction. Therefore, the bearing requirements for the lead screw 200 are small, requiring only the axial thrust bearing to bear the force, thus reducing the bearing requirements of the lead screw assembly and consequently reducing equipment costs. Preferably, the reducer 206 is also fixed on the support bearing seat 205 and connected to the lead screw 200 of the lead screw assembly through the coupling 213, making the equipment structure more compact.

[0042] Preferably, a gap is provided between the second end of the power fork arm 201 and the nut 203 of the lead screw assembly. When the lifting platform descends to its lowest position, the lead screw 200 is completely unloaded, preventing the lead screw assembly from being under stress for a long time and effectively protecting the lead screw assembly. During the lifting action, the nut 203 is initially unloaded, and only after moving a small distance does it begin to pull the first sliding shaft 11, thus enabling the scissor fork assembly to perform the lifting action.

[0043] See Figure 3 and Figure 4 The scissor lift mechanism 1 includes a first fork, a second fork, a third fork, and a fourth fork. The first fork is hinged to the second fork, and the third fork is hinged to the fourth fork. The first ends of the first and third forks are hinged to a sliding shaft, and the second ends of the first and third forks are hinged to a lifting platform. The first ends of the second and fourth forks are hinged to a lifting mounting plate 13. A second sliding shaft is slidably provided on the bottom surface of the lifting platform, and the second ends of the second and fourth forks are both hinged to the second sliding shaft. Reinforcing rods are connected between the first and third forks and between the second and fourth forks to improve the strength of the scissor lift mechanism 1.

[0044] See Figure 2 A limit block 12 is provided on the lifting mounting plate 13, and the limit block 12 is located directly below the first fork and the third fork. When the lifting platform descends to the lowest position, the first fork and the third fork abut against the limit block 12, and the weight of the support mechanism and the material is supported by the limit block 12, so as to avoid the lead screw 200 being subjected to force for a long time.

[0045] In the description of this utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0046] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0047] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "beneath" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0048] In the description of this specification, the terms "one embodiment," "some embodiments," "embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0049] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make modifications, alterations, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An electric scissor lift mechanism, characterized in that, The electric scissor lift mechanism includes a lifting platform, a lifting mounting plate (13), a scissor mechanism (1), and an electric mechanism (2). The scissor mechanism (1) is connected between the lifting platform and the lifting mounting plate (13). The electric mechanism (2) includes a motor (202), a reducer (206), a lead screw assembly, and a sliding assembly. The motor (202) and the lead screw assembly are both mounted on the lifting mounting plate (13). The motor (202) is connected to the lead screw (200) of the lead screw assembly through the reducer (206). The sliding assembly is connected to the nut (203) of the lead screw assembly, and the sliding assembly is hinged to the scissor mechanism (1).

2. The electric scissor lift mechanism as described in claim 1, characterized in that, The sliding assembly includes a first sliding shaft (11) and a power fork arm (201). The first sliding shaft (11) is slidably disposed on the lifting mounting plate (13), and the first sliding shaft (11) is hinged to the scissor mechanism (1); the first end of the power fork arm (201) is connected to the first sliding shaft (11), and the second end of the power fork arm (201) is connected to the nut (203) of the lead screw assembly.

3. The electric scissor lift mechanism as described in claim 2, characterized in that, The electric mechanism (2) further includes a limiting bearing seat (204) and a support bearing seat (205) arranged sequentially along the axial direction of the lead screw assembly, the support bearing seat (205) being close to the motor (202). The limiting bearing housing (204) is provided with a first bearing (210), and the supporting bearing housing (205) is provided with a second bearing (212) and a third bearing (211). The lead screw (200) of the lead screw assembly is sleeved in the first bearing (210), the second bearing (212) and the third bearing (211).

4. The electric scissor lift mechanism as described in claim 3, characterized in that, The first bearing (210) and the third bearing (211) are angular contact ball bearings, and the second bearing (212) is a thrust bearing.

5. The electric scissor lift mechanism as described in claim 2, characterized in that, A gap is provided between the second end of the power fork arm (201) and the nut (203) of the lead screw assembly.

6. The electric scissor lift mechanism as described in claim 2, characterized in that, The scissor mechanism (1) includes a first fork, a second fork, a third fork, and a fourth fork; The first fork is hinged to the second fork, and the third fork is hinged to the fourth fork; The first end of the first fork and the third fork are hinged to the first sliding shaft (11), and the second end of the first fork and the third fork are hinged to the lifting platform; The first ends of the second fork and the fourth fork are hinged to the lifting mounting plate (13), and the bottom surface of the lifting platform is slidably provided with a second sliding shaft. The second ends of the second fork and the fourth fork are both hinged to the second sliding shaft.

7. The electric scissor lift mechanism as described in claim 6, characterized in that, A reinforcing rod is connected between the first fork and the third fork, and between the second fork and the fourth fork.

8. The electric scissor lift mechanism as described in claim 6, characterized in that, A limiting block (12) is provided on the lifting mounting plate (13), and the limiting block (12) is located directly below the first fork and the third fork.

9. The electric scissor lift mechanism as described in claim 1, characterized in that, The motor (202) is a servo motor (202).

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