Fixed shear fork type lifting platform

Abstract

The utility model relates to the technical field of scissor lifting platforms, and discloses a fixed scissor lifting platform, which comprises a base, a scissor arm group and a lifting platform, a transverse stabilizer bar is arranged at the intersection of the scissor arm group, and the transverse stabilizer bar comprises a sleeve and a bidirectional hydraulic damper; the two ends of the sleeve are fixed to the hinged shafts of the two sections of symmetrically-arranged shear fork arms through flanges respectively. The cross arm moves synchronously along with the transverse deviation of the shear fork arm; the two-way hydraulic damper is arranged in the middle of the sleeve, and the ends of two piston rods of the two-way hydraulic damper are connected with compressible springs. A pressure feedback sensor is arranged on the contact face of the hinge shaft and the sleeve and used for monitoring the transverse stress of the shear fork arm in real time, the bidirectional hydraulic damper is matched with the compressible spring, bidirectional buffering and stability can be achieved, the spring can adjust the reset force according to loads, the hydraulic damper consumes energy efficiently, transverse shaking is remarkably reduced, and stability and working precision are improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of scissor lift, specifically relates to a fixed scissor lift. BACKGROUND

[0002] As a common vertical transportation equipment, the fixed scissor lift is widely used in industrial production, logistics and warehousing, construction and other fields. Its main function is to lift goods or personnel to different height positions to meet various operation requirements. In actual use, due to uneven load distribution, non-standard operation and external environmental factors, the scissor arms are prone to lateral deviation and shaking. Such lateral deviation not only reduces the working accuracy of the lift, affects the accuracy of goods handling and placement, but also threatens the structural stability of the lift, increasing the safety hazard. Long-term lateral deviation and shaking also accelerate the wear of the scissor arms and related components, shorten the service life of the equipment and increase the maintenance cost.

[0003] In order to solve the problem of lateral stability of the scissor lift, some measures have been taken in the prior art, such as adding reinforcing ribs, setting simple buffer devices and other connecting structures. However, these methods are not ideal in dealing with complex working conditions, and cannot realize accurate control and effective compensation of lateral deviation. If the connecting structure cannot well ensure the concentricity of the lateral stability component and the scissor arm, it will lead to inaccurate force and motion transmission, produce additional stress and wear, accelerate the damage of the components and shorten the service life of the equipment.

[0004] In view of this, we propose a fixed scissor lift to solve the above problems. INVENTION CONTENTS

[0005] The present application aims to solve the technical problem of poor lateral stability of the fixed scissor lift in the prior art.

[0006] To achieve the above purpose, the utility model provides the following technical scheme:

[0007] A fixed scissor lift, comprising a base, a scissor arm group and a lifting platform, a lateral stability rod is arranged at the intersection of the scissor arm group, the lateral stability rod comprises a sleeve and a bidirectional hydraulic damper;

[0008] The sleeve is fixed on the hinge shafts of the two symmetrical scissor arms at both ends through flanges; and moves synchronously with the lateral deviation of the scissor arms;

[0009] The bidirectional hydraulic damper is built-in in the middle part of the sleeve, and the two piston rod ends of the bidirectional hydraulic damper are connected with compressible springs;

[0010] The contact surface of the articulated shaft and the sleeve is provided with a pressure feedback sensor for real-time monitoring of the transverse stress of the scissor arm.

[0011] As preferred, the bottom of the lifting platform is provided with a level detection module, which comprises a laser level and a gyroscope, and the level detection module and the pressure feedback sensor are connected to the control system through a CAN bus, forming a closed-loop control of the transverse offset-damping adjustment.

[0012] As preferred, a flange A is arranged on the end of the articulated shaft which is connected to the sleeve, and a flange B is arranged on the end of the sleeve which is connected to the articulated shaft, and the flange A and the flange B are connected through flange bolts to realize the flange connection of the sleeve and the articulated shaft.

[0013] As preferred, one end of each compressible spring is fixed to the fixed block at the end of the piston rod of the hydraulic damper, and the other end abuts against the limiting boss on the inner wall of the sleeve.

[0014] As preferred, the pressure feedback sensor is embeddedly installed in the flange A on the articulated shaft, and an installation groove is formed in the flange A for embeddedly installing the pressure feedback sensor.

[0015] As preferred, a screw rod is arranged through the sleeve and is screwed with the housing of the bidirectional hydraulic damper, and the bidirectional hydraulic damper is fixed in the middle of the sleeve through the screw rod.

[0016] Compared with the prior art, the technical effects and advantages of the utility model are:

[0017] When the scissor arm produces a transverse offset force due to uneven load and other factors, the sleeve which is stably connected with the articulated shaft through the flange bolt will move synchronously. The bidirectional hydraulic damper is arranged in the middle of the sleeve, and the compressible spring connected to the end of the piston rod of the hydraulic damper is compressed on one side and stretched on the other side when the scissor arm is offset, so as to store elastic potential energy to provide a restoring force. The hydraulic damper converts the mechanical energy transmitted by the spring into heat energy and dissipates it, thereby consuming the transverse offset energy. At the same time, the pressure feedback sensor at the contact surface of the articulated shaft and the sleeve monitors the transverse stress in real time, and the level detection module (including a laser level and a gyroscope) at the bottom of the lifting platform accurately detects the level of the platform. The data of the two are transmitted to the control system through a CAN bus, and the control system dynamically adjusts the valve opening degree of the hydraulic damper according to the data, thereby realizing the adjustment and compensation of the transverse offset.

[0018] In structure, the sleeve and the hinged shaft are connected by flanges, which ensures the strength, stability and concentricity of the connection, avoids loosening and relative displacement, improves the structural safety of the lifting platform, and also facilitates installation and maintenance, reduces maintenance cost, and prolongs the service life of the components. The bidirectional hydraulic damper cooperates with the compressible spring to provide buffering and stabilizing effect when the scissor arms are bidirectionally offset. The spring can change the elastic return force according to different load conditions, so that the lateral stabilizing rod can adapt to complex working conditions; the hydraulic damper dissipates energy efficiently, reduces lateral shaking and vibration, and improves the stability and working precision of the lifting platform.

[0019] The pressure feedback sensor is embeddedly installed in the flange A, which can directly and accurately monitor the lateral stress, avoid external interference, protect the sensor, optimize the wiring, and be beneficial to the integration of the control system. The horizontal detection module accurately detects the horizontal state of the platform in real time, and together with the pressure feedback sensor data, forms a closed-loop control system of lateral offset-damping adjustment. The system can automatically adapt to different loads and working environments, correct the lateral offset in time, improve the working precision and safety of the lifting platform, and reduce safety accidents. At the same time, the closed-loop control embodies the intelligent and automatic characteristics of the lifting platform, without manual intervention, improves the working efficiency, and reduces the operation difficulty and error. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is the first perspective view of the utility model;

[0021] Figure 2 is the second perspective view of the utility model;

[0022] Figure 3 is a structural schematic view of the lateral stabilizing rod and the hinged shaft of the utility model;

[0023] Figure 4 is an exploded view of the utility model; Figure 3

[0024] Figure 5 is a structural schematic view of the hinged shaft of the utility model;

[0025] Figure 6 is a sectional view along the line A-A in the utility model; Figure 3

[0026] In the figure: 1, base; 2, scissor arm group; 21, scissor arm; 22, hinged shaft; 23, mounting groove; 24, flange A; 3, lifting platform; 4, lateral stabilizing rod; 41, sleeve; 42, bidirectional hydraulic damper; 43, piston rod; 44, compressible spring; 46, flange B; 47, fixed block; 48, limiting boss; 49, screw rod; 5, pressure feedback sensor; 6, laser level; 7, gyroscope. DETAILED DESCRIPTION ​​

[0027] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. 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.

[0028] The following will be described in detail Figures 1 to 6 The application is further described in detail,

[0029] The embodiment of the application discloses a fixed scissor type lifting platform, which comprises a base 1, a scissor arm group 2 and a lifting platform 3, a transverse stabilizing rod 4 is arranged at the intersection of the scissor arm group 2, and the transverse stabilizing rod 4 comprises a sleeve 41 and a bidirectional hydraulic damper 42.

[0030] The sleeve 41 is fixed on the hinge shaft 22 of the two symmetrical scissor arms 21 at both ends through flanges respectively; and the sleeve 41 moves synchronously with the transverse deviation of the scissor arm 21.

[0031] A flange plate A 24 is arranged at one end of the hinge shaft 22 which is connected with the sleeve 41, and a flange plate B 46 is arranged at one end of the sleeve 41 which is connected with the hinge shaft 22, after the flange plate A 24 and the flange plate B 46 are connected through flange bolts, the flange connection of the sleeve 41 and the hinge shaft 22 is realized.

[0032] The flange plate A and the flange plate B are connected through flange bolts, and this connection mode can provide greater connection strength and stability. In the working process of the scissor type lifting platform, the scissor arm 21 will bear complex load and stress, and the stable connection can ensure that the sleeve 41 and the hinge shaft 22 will not appear loose or relative displacement, so as to ensure that the transverse stabilizing rod 4 can effectively play a role and improve the structural safety of the whole lifting platform. The flange connection mode is more convenient and fast in the installation and maintenance process. When the transverse stabilizing rod 4 or the scissor arm 21 needs to be overhauled or the parts are replaced, the sleeve 41 and the hinge shaft 22 can be easily separated through the disassembly of the flange bolts, so as to reduce the maintenance time and cost. The flange connection can better ensure the concentricity of the sleeve 41 and the hinge shaft 22. Good concentricity helps to ensure that the transverse stabilizing rod 4 can accurately transmit force and motion when working, avoids additional stress and wear caused by different concentricity, and prolongs the service life of the parts.

[0033] The bidirectional hydraulic damper 42 is built in the middle of the sleeve 41, and the two piston rods 43 of the bidirectional hydraulic damper 42 are connected with compressible springs 44; one end of each compressible spring 44 is fixed on the fixed block 47 at the end of the piston rod 43 of the hydraulic damper, and the other end abuts against the limiting boss 48 on the inner wall of the sleeve 41. The sleeve 41 is penetrated by a screw rod 49 which is screwed with the shell of the bidirectional hydraulic damper 42, and the bidirectional hydraulic damper 42 is fixed in the middle of the sleeve 41 by the screw rod 49.

[0034] The bidirectional hydraulic damper 42 can play a role in buffering and stabilizing when the scissor arm 21 is laterally offset in both directions. When the scissor arm 21 is offset, the compression and stretching of the spring can provide an elastic restoring force, and the hydraulic damper can convert the mechanical energy absorbed by the spring into heat energy and dissipate it, effectively reducing the lateral shaking and vibration of the scissor arm 21, and improving the stability and working accuracy of the lifting platform.

[0035] The bidirectional hydraulic damper 42 is fixed in the middle of the sleeve 41 by the screw rod 49 which penetrates the sleeve 41 and is screwed with the shell of the bidirectional hydraulic damper 42. This installation method is convenient for adjusting the position and fixing state of the hydraulic damper. During installation, the position of the hydraulic damper can be accurately adjusted according to actual needs to ensure that it is in the best working state. Moreover, the connection mode of the screw rod 49 has a certain degree of detachability, which is convenient for the maintenance and replacement of the hydraulic damper.

[0036] The setting of the compressible spring 44 enables the lateral stabilizing rod 4 to adapt to different degrees of lateral offset. Under different load working conditions, the compression and stretching degree of the spring will change, thereby changing the size of the elastic restoring force provided by the spring, so that the lateral stabilizing rod 4 can better cope with various complex working conditions.

[0037] The contact surface of the hinge shaft 22 and the sleeve 41 is provided with a pressure feedback sensor 5 for real-time monitoring of the lateral stress of the scissor arm 21. The pressure feedback sensor 5 is embeddedly installed in the flange plate A 24 on the hinge shaft 22, and the flange plate A 24 is provided with an installation groove 23 for embeddedly installing the pressure feedback sensor 5.

[0038] The pressure feedback sensor 5 is embeddedly installed in the flange plate A on the hinge shaft 22, which can directly contact the contact surface of the hinge shaft 22 and the sleeve 41, thereby accurately and real-timely monitoring the lateral stress of the scissor arm 21. This direct measurement method can avoid external interference and improve the accuracy and reliability of stress monitoring.

[0039] Embedding the pressure feedback sensor 5 into the installation groove 23 of the flange plate A can provide a certain protection for the sensor. The installation groove 23 can prevent the sensor from being collided and damaged by external objects, and also can reduce the erosion of dust, moisture and other factors to the sensor, thereby prolonging the service life of the sensor.

[0040] The embedded installation method makes the wiring of the sensor more convenient and neat. The signal line of the sensor can be arranged through the space inside or around the flange A, avoiding damage and interference caused by exposed signal line, and facilitating the integration and stable operation of the entire control system.

[0041] The bottom of the lifting platform 3 is provided with a level detection module, which includes a laser level 6 and a gyroscope 7. The level detection module and the pressure feedback sensor 5 are connected to the control system through the CAN bus, forming a closed-loop control of lateral displacement-damping adjustment.

[0042] The level detection module (laser level 6 and gyroscope 7) detects the level state of the lifting platform 3 in real time, and the pressure feedback sensor 5 monitors the lateral stress of the scissors arm 21 in real time. Both are connected to the control system through the CAN bus, forming a closed-loop control of lateral displacement-damping adjustment. The control system can dynamically adjust the valve opening of the bidirectional hydraulic damper 42 according to the detected level state and lateral stress information, timely adjust and compensate the lateral displacement of the scissors arm 21, and ensure that the lifting platform 3 always maintains level and stability.

[0043] Improve work precision and safety: closed-loop control can automatically adapt to different load conditions and working environments, timely correct the lateral displacement of the scissors arm 21, and improve the work precision and stability of the lifting platform 3. This is particularly important for some occasions that require high work precision (such as the handling and installation of precision instruments). At the same time, stable working state can also improve the safety of the lifting platform, reduce safety accidents caused by lateral shaking and displacement.

[0044] Closed-loop control embodies the intelligent and automated features of the lifting platform. The operator does not need to manually intervene, and the system can automatically adjust according to the actual situation, improving work efficiency and reducing the difficulty and error of manual operation.

[0045] When the scissors arm 21 shifts to the right, the right limit boss 48 will move to the right with the sleeve 41, thereby compressing the right spring; while the left spring will be stretched under the action of the piston rod 43. Conversely, when the scissors arm 21 shifts to the left, the left spring will be compressed and the right spring will be stretched. In this way, the spring can provide elastic return force when the scissors arm 21 shifts laterally.

[0046] This fixed scissor lift platform mainly consists of a base 1, scissor arm assembly 2, and lifting platform 3, forming its basic structure. The scissor arm assembly 2, as the key structure connecting the base 1 and the lifting platform 3, uses hydraulic rods to actuate the relative rotation between the scissor arms 21, thereby raising and lowering the lifting platform 3. When the lifting platform is in operation, external power drives the scissor arm assembly 2, causing the lifting platform 3 to displace vertically to meet different working height requirements.

[0047] A lateral stabilizer bar 4 is installed at the intersection of the scissor arm assembly 2. The two ends of its sleeve 41 are connected to the hinge shaft 22 of the two symmetrical scissor arms 21 via flanges. When the scissor arms 21 experience lateral offset due to uneven load, the sleeve 41 and the hinge shaft 22 are connected by flange bolts. This stable connection allows the sleeve 41 to move synchronously in the offset direction with the hinge shaft 22.

[0048] The bidirectional hydraulic damper 42 is built into the middle of the sleeve 41, and the compressible springs 44 connected to the ends of its two piston rods 43 play an important role. Taking the scissor arm 21 shifting to the right as an example, the right-side limiting boss 48 moves to the right with the sleeve 41, compressing the right-side spring and causing it to deform; at the same time, the left-side spring is stretched under the action of the piston rod 43. Conversely, when the scissor arm 21 shifts to the left, the left-side spring is compressed and the right-side spring is stretched. During the compression or stretching process, the spring stores elastic potential energy, thereby providing an elastic restoring force for the scissor arm 21, attempting to restore the scissor arm 21 to its original position.

[0049] The bidirectional hydraulic damper 42 can buffer and stabilize the scissor arm 21 during lateral displacement in both left and right directions. When the spring is compressed or stretched and the force is transmitted to the hydraulic damper through the piston rod 43, the oil inside the hydraulic damper flows, converting the mechanical energy absorbed by the spring into heat energy. This heat energy is quickly dissipated through the surface of the sleeve 41, thereby consuming the kinetic energy of the scissor arm 21 during lateral displacement and reducing lateral swaying and vibration.

[0050] A pressure feedback sensor 5 is embedded in the flange A of the hinge shaft 22, located at the contact surface between the hinge shaft 22 and the sleeve 41. This sensor directly contacts the contact surface between the hinge shaft 22 and the sleeve 41, accurately monitoring the lateral stress of the scissor arm 21 in real time. The sensor converts the monitored stress data into an electrical signal, which is then transmitted to the subsequent control system via wiring. This embedded installation not only avoids external interference, improving the accuracy and reliability of stress monitoring, but also protects the sensor and extends its service life.

[0051] The horizontal detection module at the bottom of the lifting platform 3 is composed of a laser level 6 and a gyroscope 7. The laser level 6 determines the levelness of the lifting platform 3 by emitting a laser beam and detecting the reflected light, and the gyroscope 7 can measure the angular change and rotational angular velocity of the platform. The two work together to accurately detect the horizontal state of the lifting platform 3 in real time.

[0052] The horizontal detection module and the pressure feedback sensor 5 transmit the detected horizontal state and lateral stress information to the control system through the CAN bus. After analyzing and processing these information, the control system dynamically adjusts the valve opening of the bidirectional hydraulic damper 42 in real time according to the preset control algorithm. For example, when a large lateral offset of the scissor arm 21 is detected, the control system will increase the valve opening of the hydraulic damper to increase the flow resistance of the oil, thereby enhancing the damping effect and more quickly dissipating the energy of the lateral offset; conversely, the valve opening is reduced. Through this closed-loop control method, the lateral offset of the scissor arm 21 can be adjusted and compensated in time, ensuring that the lifting platform 3 always remains level and stable, and improving the working accuracy, safety, and intelligent and automated degree of the lifting platform.

[0053] Finally, it should be noted that the above-described preferred embodiments of the present application are not intended to limit the present application, and although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent replacements to some technical features, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A fixed scissor lift comprising a base (1), a scissor arm set (2) and a lifting platform (3), characterized in that: A transverse stabilizing rod (4) is arranged at the intersection of the scissors arm group (2), and the transverse stabilizing rod (4) comprises a sleeve (41) and a bidirectional hydraulic damper (42); The sleeve (41) is fixed on the hinge shaft (22) of the two symmetrical scissors arms (21) at both ends through flanges respectively; and the sleeve (41) moves synchronously with the transverse offset of the scissors arms (21); The bidirectional hydraulic damper (42) is built-in in the middle part of the sleeve (41), and the two piston rods (43) of the bidirectional hydraulic damper (42) are connected with compressible springs (44) at the ends; The contact surface of the hinge shaft (22) and the sleeve (41) is provided with a pressure feedback sensor (5) for real-time monitoring of the transverse stress of the scissors arms (21).

2. A fixed scissors lift as claimed in claim 1, characterised in that: The bottom of the lifting platform (3) is provided with a level detection module, which comprises a laser level (6) and a gyroscope (7), and the level detection module and the pressure feedback sensor (5) are connected to the control system through the CAN bus, forming a closed-loop control of the transverse offset-damping adjustment.

3. The stationary scissor lift table of claim 1, wherein: The end of the hinge shaft (22) which is in abutment with the sleeve (41) is provided with a flange A (24), and the end of the sleeve (41) which is in abutment with the hinge shaft (22) is provided with a flange B (46), after the flange A (24) and the flange B (46) are connected through flange bolts, the flange abutment of the sleeve (41) and the hinge shaft (22) is realized.

4. The stationary scissor lift table of claim 1, wherein: One end of each compressible spring (44) is fixed on the fixed block (47) at the end of the piston rod (43) of the hydraulic damper, and the other end abuts against the limiting boss (48) on the inner wall of the sleeve (41).

5. The stationary scissor lift table of claim 1, wherein: The pressure feedback sensor (5) is embeddedly installed in the flange A (24) on the hinge shaft (22), and the flange A (24) is provided with an installation groove (23) matched with the embedded installation of the pressure feedback sensor (5).

6. The stationary scissor lift table of claim 1, wherein: The sleeve (41) is provided with a screw rod (49) which is screwed with the housing of the bidirectional hydraulic damper (42), and the bidirectional hydraulic damper (42) is fixed in the middle part of the sleeve (41) through the screw rod (49). The sleeve (41) is provided with a screw rod (49) which is screwed with the housing of the bidirectional hydraulic damper (42), and the bidirectional hydraulic damper (42) is fixed in the middle part of the sleeve (41) through the screw rod (49).

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