Hydraulic drive protection device for scissor type aerial work platform

Abstract

The utility model provides a hydraulic drive protection device for a scissor type aerial work platform, and relates to the technical field of aerial work platforms. A shear type hydraulic telescopic frame is arranged on the top end face of the mounting base. A platform body is arranged on the upper portion of the shear type hydraulic telescopic frame. The top end face of the platform body is fixedly connected with a protective fence. The lower part of the mounting base is in bolt fastening connection with four driving wheels in a rectangular array shape; the right end surface of the mounting base is fixedly connected with a fixed seat; the right end surface of the fixed seat is fixedly connected with a storage box; and a sealing cover is hinged to the top end surface of the storage box. When a sealing cover is opened, a control gear drives a control rack to move, a lifting sliding plate extrudes a pressure switch, at the moment, a shear type hydraulic telescopic frame can ascend and descend, and the problem that workers often skip the overhauling step to directly start the shear fork type aerial work platform due to negligence or inertia reasons is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of aerial work platforms, in particular to a hydraulic drive protection device for a scissor-type aerial work platform. Background Art

[0002] During the use of the scissor-type aerial work platform, a hydraulic drive assembly is usually used to drive it. In order to ensure that the hydraulic drive assembly drives the scissor-type aerial work platform stably, the staff usually uses a hydraulic drive protection device to protect the hydraulic drive assembly. The existing hydraulic drive protection device usually consists of a mounting base, a scissor-type hydraulic telescopic frame, a platform body and an overload protection valve.

[0003] For example: The utility model with application number CN202121676842.0 discloses a hydraulically driven scissor-type aerial work platform, which specifically includes a frame, a bearing base plate with a scissor mechanism and a work platform installed, the bearing base plate is located above the frame, and is characterized in that the bearing base plate and the frame are provided with mutually matching ball hinge seats and ball hinge joints, and the frame is also provided with a plurality of adjustment devices for adjusting the angle of the bearing base plate distributed in a circle around the ball hinge joint or the ball hinge seat; the adjustment device includes an adjustment rod supporting the bearing base plate and a lifting cylinder connected to the adjustment rod. The utility model has a wider adjustment direction and can be better applied to various working conditions to ensure the safety and stability of the work platform.

[0004] However, with regard to the current traditional hydraulic drive protection device, in order to better protect the hydraulic drive components, it is usually necessary to inspect the hydraulic drive components before the scissor-type aerial work platform is used to prevent the hydraulic drive components from malfunctioning during use and causing failure. However, due to negligence or laziness, the staff often skips the inspection steps and directly starts the scissor-type aerial work platform, which easily ignores the potential problems of the hydraulic drive components, accelerates the wear and failure of the hydraulic drive device, and is inconvenient to use. Utility Model Content

[0005] In view of this, the utility model provides a hydraulic drive protection device for a scissor-type aerial work platform, which has a lifting slide and a pressure switch that can remind staff to perform maintenance. During the opening of the sealing cover, the control gear will be driven to rotate, and during the rotation of the control gear, the control rack engaged with the control gear will be driven to move, and during the movement of the control rack, the lifting slide will be driven to move downward. As the lifting slide moves, the pressure switch will be slowly squeezed. The scissor-type hydraulic telescopic frame can only be raised and lowered when the pressure switch is pressed down. When the pressure switch is not pressed, the scissor-type hydraulic telescopic frame will not start even if the main switch of the scissor-type aerial work platform is turned on.

[0006] The utility model provides a scissor-type hydraulic drive protection device for an aerial work platform, which specifically comprises: a mounting base; a scissor-type hydraulic telescopic frame is arranged on the top surface of the mounting base; a platform body is arranged on the upper part of the scissor-type hydraulic telescopic frame; a protective fence is fixedly connected to the top surface of the platform body; four driving wheels are fastened and connected with bolts in a rectangular array at the lower part of the mounting base; a fixing seat is fixedly connected to the right end surface of the mounting base; a storage box is fixedly connected to the right end surface of the fixing seat; a sealing cover is hingedly connected to the top surface of the storage box; two control torsion springs are symmetrically fixedly connected to the outside of a rotating shaft of the sealing cover; the outsides of the two control torsion springs are fixedly connected to the outside of the storage box.

[0007] Optionally, two control gears are symmetrically fixedly connected to the outside of the sealing cover shaft; and a control rack is meshed on the left portion of each of the two control gears.

[0008] Optionally, the bottom end surfaces of the two control racks are fixedly connected to a lifting slide; the two lifting slides are slidably connected to the outside of the fixed seat; the lower part of the fixed seat is symmetrically fixedly connected to two fixed plates; the top surfaces of the two fixed plates are fixedly connected to a pressure switch; the pressure switch is aligned with the position of the lifting slide; the pressure switch is electrically connected to the main control system of the scissor-type hydraulic telescopic frame.

[0009] Optionally, a locking block is fixedly connected to the center of the right end face of the sealing cover; a connecting seat is fixedly connected to the right part of the mounting base; the connecting seat and the locking block are aligned; two sliding plates are symmetrically slidably connected in the connecting seat; a connecting spring is fixedly connected to the outer sides of the two sliding plates; the ends of the two connecting springs are fixedly connected in the connecting seat; and a limiting wedge block is fixedly connected to the inner sides of the two sliding plates.

[0010] Optionally, the top end surfaces of the two sliding plates are fixedly connected to an auxiliary vertical plate; the top end surface of the connecting seat is centrally rotatably connected to an operating handle; the outside of the operating handle is fixedly connected to a control cam; and the two auxiliary vertical plates are aligned with the position of the control cam.

[0011] Optionally, a load-bearing plate is fixedly connected inside the platform body; the top surface of the load-bearing plate is bolted and connected with multiple groups of weighing sensors in a rectangular array; the top surfaces of the multiple groups of weighing sensors are fixedly connected with a weighing plate.

[0012] Beneficial Effects

[0013] During the use of the utility model, when the sealing cover is opened, the control gear will drive the control rack meshing therewith to move, and drive the lifting slide plate downward to squeeze the pressure switch. The scissor-type hydraulic telescopic frame can only be lifted and lowered when the pressure switch is pressed down. When the pressure switch is not pressed down, the scissor-type hydraulic telescopic frame will not start even if the main switch of the scissor-type aerial work platform is turned on. This makes it necessary for the staff to open the sealing cover before starting the scissor-type aerial work platform, reminding the staff to inspect the hydraulic drive assembly, enhancing the staff's safety awareness and understanding of the importance of the hydraulic drive assembly, and also helping the staff to keep the tools clean and orderly, making it easy to quickly find the required tools when needed, effectively improving the practicality of the hydraulic drive protection device of the scissor-type aerial work platform.

[0014] By setting up the weighing plate and weighing sensor, the weight of the workers and tools on the platform body can be weighed to prevent the scissor-type aerial work platform from overloading and protect the hydraulic drive components of the scissor-type aerial work platform, effectively improving the convenience of the hydraulic drive protection device of the scissor-type aerial work platform. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solution of the embodiment of the utility model, the drawings of the embodiment will be briefly introduced below.

[0016] In the attached picture:

[0017] Figure 1 It is an axonometric structural schematic diagram of the utility model.

[0018] Figure 2 It is a cross-sectional structural schematic diagram of the utility model.

[0019] Figure 3 It is an axonometric structural schematic diagram of the storage box of the utility model.

[0020] Figure 4 This utility model Figure 3 A is an enlarged structural diagram of FIG.

[0021] Figure 5 It is a schematic diagram of the axonometric structure of the utility model after the sealing cover is opened.

[0022] Figure 6 It is an axonometric structural diagram of the connecting seat of the utility model.

[0023] Reference numerals list

[0024] 1. Installation base; 101. Scissor-type hydraulic telescopic frame; 102. Platform body; 103. Driving wheel; 104. Protective fence; 105. Load-bearing plate; 106. Weighing sensor; 107. Weighing plate; 108. Fixed seat; 109. Storage box; 110. Sealing cover; 111. Control torsion spring; 112. Locking block; 113. Control gear; 114. Lifting slide; 115. Control rack; 116. Fixed plate; 117. Pressure switch; 118. Connecting seat; 119. Sliding plate; 120. Limit wedge block; 121. Connecting spring; 122. Auxiliary vertical plate; 123. Operating handle; 124. Control cam. DETAILED DESCRIPTION

[0025] In order to make the purpose, scheme and advantages of the technical solution of the utility model clearer, the technical solution of the embodiment of the utility model will be clearly and completely described in conjunction with the drawings of the specific embodiments of the utility model. Unless otherwise specified, the terms used in this article have the usual meanings in the art. The same reference numerals in the drawings represent the same components.

[0026] Embodiment 1:

[0027] This utility model proposes a hydraulic drive protection device for a scissor-type aerial work platform. Please refer to Figures 1 to 6 , including: a mounting base 1;

[0028] A scissor-type hydraulic telescopic frame 101 is provided on the top surface of the mounting base 1; a platform body 102 is provided on the upper part of the scissor-type hydraulic telescopic frame 101; a protective fence 104 is fixedly connected to the top surface of the platform body 102; the lower part of the mounting base 1 is bolted in a rectangular array with four driving wheels 103; a fixing seat 108 is fixedly connected to the right end surface of the mounting base 1; a storage box 109 is fixedly connected to the right end surface of the fixing seat 108; a sealing cover 110 is hingedly connected to the top surface of the storage box 109; two control torsion springs 111 are symmetrically fixedly connected to the outside of the rotating shaft of the sealing cover 110; the outsides of the two control torsion springs 111 are fixedly connected to the outside of the storage box 109.

[0029] Two control gears 113 are symmetrically fixedly connected to the outside of the rotating shaft of the sealing cover 110 ; a control rack 115 is meshed on the left part of the two control gears 113 .

[0030] The bottom end surfaces of the two control racks 115 are fixedly connected with a lifting slide 114; the two lifting slides 114 are slidably connected to the outside of the fixed seat 108; the lower part of the fixed seat 108 is symmetrically fixedly connected with two fixed plates 116; the top surfaces of the two fixed plates 116 are fixedly connected with a pressure switch 117; the pressure switch 117 is aligned with the position of the lifting slide 114; the pressure switch 117 is electrically connected to the main control system of the scissor-type hydraulic telescopic frame 101.

[0031] A locking block 112 is fixedly connected to the center of the right end face of the sealing cover 110; a connecting seat 118 is fixedly connected to the right part of the mounting base 1; the connecting seat 118 is aligned with the locking block 112; two sliding plates 119 are symmetrically slidably connected in the connecting seat 118; a connecting spring 121 is fixedly connected to the outer side of the two sliding plates 119; the ends of the two connecting springs 121 are fixedly connected in the connecting seat 118; a limiting wedge block 120 is fixedly connected to the inner side of the two sliding plates 119.

[0032] The top surfaces of the two sliding plates 119 are fixedly connected to an auxiliary vertical plate 122; the top surface of the connecting seat 118 is centrally rotatably connected to an operating handle 123; the outside of the operating handle 123 is fixedly connected to a control cam 124; the two auxiliary vertical plates 122 are aligned with the position of the control cam 124.

[0033] The specific usage and function of this embodiment: when inspecting the driving mechanism of the scissor-type aerial work platform, open the sealing cover 110 and take out the inspection tools from the storage box 109 for inspection. In the process of opening the sealing cover 110, the control gear 113 will be driven to rotate, and in the process of rotating the control gear 113, the control rack 115 meshing therewith will be driven to move, and in the process of moving the control rack 115, the lifting slide 114 will be driven to move downward. As the lifting slide 114 moves, the pressure switch 117 will be slowly squeezed. Only when the pressure switch 117 is pressed down can the scissor-type hydraulic telescopic frame 101 be lifted and lowered. When the pressure switch 117 is not pressed down, even if the main switch of the scissor-type aerial work platform is turned on, the scissor-type hydraulic telescopic frame 101 will not start. The setting of the driving wheel 103 facilitates the movement of the scissor-type aerial work platform. During the opening of the sealing cover 110, the locking block 112 will squeeze the limiting wedge block 120, so that the limiting wedge block 120 drives the sliding plate 119 to slide and squeeze the connecting spring 121. After the sealing cover 110 is fully opened, the sliding plate 119 will reset with the rebound of the connecting spring 121, and the locking block 112 is limited to ensure that the sealing cover 110 is always in the open state. After the use of the scissor-type aerial work platform is completed, the operating handle 123 is rotated to make the operating handle 123 drive the control cam 124 to rotate, so that the control cam 124 squeezes the sliding plate 119, and the sealing cover 110 is reset with the rebound of the control torsion spring 111, so as to automatically protect the maintenance tools in the storage box 109.

[0034] Example:

[0035] Based on Example 1, please refer to Figure 1 to Figure 2 , including: a bearing plate 105, a weighing sensor 106 and a weighing plate 107. A bearing plate 105 is fixedly connected inside the platform body 102; the top surface of the bearing plate 105 is in a rectangular array and bolted with multiple groups of weighing sensors 106; the top surfaces of the multiple groups of weighing sensors 106 are fixedly connected with a weighing plate 107.

[0036] The specific usage and function of this embodiment: when the workers carry tools into the platform body 102, the protective fence 104 protects the workers. At the same time, the weight of the workers and tools on the platform body 102 can be weighed through the setting of the weighing plate 107 and the weighing sensor 106, thereby preventing the scissor-type aerial work platform from overloading and protecting the hydraulic drive components of the scissor-type aerial work platform.

[0037] In this article, there are a few points to note:

[0038] 1. The drawings of the embodiments of the present disclosure only involve structures related to the embodiments of the present disclosure, and other structures may refer to general designs.

[0039] 2. In the absence of conflict, the embodiments of the present disclosure and the features therein may be combined with each other to obtain new embodiments.

[0040] The above are only specific embodiments of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present disclosure, which should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. A hydraulic drive protection device for a scissor-type aerial work platform, comprising: A mounting base (1); a scissor-type hydraulic telescopic frame (101) is provided on the top surface of the mounting base (1); a platform body (102) is provided on the upper part of the scissor-type hydraulic telescopic frame (101); the characterised in that the top surface of the platform body (102) is fixedly connected with a protective fence (104); the lower part of the mounting base (1) is bolted and fastened with four driving wheels (103) in a rectangular array; a fixing seat (108) is fixedly connected to the right end surface of the mounting base (1); a storage box (109) is fixedly connected to the right end surface of the fixing seat (108); a sealing cover (110) is hingedly connected to the top surface of the storage box (109); two control torsion springs (111) are symmetrically fixedly connected to the outside of the rotating shaft of the sealing cover (110); the outsides of the two control torsion springs (111) are fixedly connected to the outside of the storage box (109).

2. A scissor-type aerial work platform hydraulic drive protection device as claimed in claim 1, characterized in that: Two control gears (113) are symmetrically fixedly connected to the outside of the rotating shaft of the sealing cover (110); and a control rack (115) is meshed on the left side of each of the two control gears (113).

3. A scissor-type aerial work platform hydraulic drive protection device as claimed in claim 2, characterized in that: The bottom end surfaces of the two control racks (115) are fixedly connected to a lifting slide plate (114); the two lifting slide plates (114) are slidably connected to the outside of the fixed seat (108); the lower part of the fixed seat (108) is symmetrically fixedly connected to two fixed plates (116); the top ends of the two fixed plates (116) are fixedly connected to a pressure switch (117); the pressure switch (117) is aligned with the lifting slide plate (114); the pressure switch (117) is electrically connected to the main control system of the scissor-type hydraulic telescopic frame (101).

4. A scissor-type aerial work platform hydraulic drive protection device as claimed in claim 1, characterized in that: A locking block (112) is fixedly connected to the center of the right end surface of the sealing cover (110); a connecting seat (118) is fixedly connected to the right part of the mounting base (1); the connecting seat (118) and the locking block (112) are aligned; two sliding plates (119) are symmetrically slidably connected in the connecting seat (118); a connecting spring (121) is fixedly connected to the outer side of the two sliding plates (119); the ends of the two connecting springs (121) are fixedly connected in the connecting seat (118); and a limiting wedge block (120) is fixedly connected to the inner side of the two sliding plates (119).

5. A scissor-type aerial work platform hydraulic drive protection device as claimed in claim 4, characterized in that: The top ends of the two sliding plates (119) are fixedly connected to an auxiliary vertical plate (122); the top end of the connecting seat (118) is centrally rotatably connected to an operating handle (123); the outside of the operating handle (123) is fixedly connected to a control cam (124); and the two auxiliary vertical plates (122) are aligned with the control cam (124).

6. A scissor-type aerial work platform hydraulic drive protection device as claimed in claim 1, characterized in that: A bearing plate (105) is fixedly connected inside the platform body (102); the top end surface of the bearing plate (105) is bolted and connected to a plurality of groups of weighing sensors (106) in a rectangular array; and a weighing plate (107) is fixedly connected to the top end surfaces of the plurality of groups of weighing sensors (106).

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