Concrete floor ceiling polishing device for building construction

Abstract

The building construction concrete floor ceiling polishing device comprises a base, a stand column, a linkage protective cover, a dust collection mechanism, a connecting rod set and a driving frame are arranged on the base, the stand column is perpendicularly fixed to the base, and a supporting seat is fixed to the position, on the front side of the stand column, of the base; the lifting column comprises a supporting column and a lifting rod, the supporting seat is vertically placed on the supporting seat, the supporting column is connected with the stand column through the connecting rod set to form a lifting frame of a parallelogram structure, the control end of the lifting frame is located on the rear side of the stand column, the driving frame is arranged on the rear side of the stand column, and the bottom end of the driving frame is hinged to the stand column. The device is unique in structure and ingenious in design, through the integrated design of the lifting frame, the linkage protective cover and the dust collection mechanism, the polishing height can be adjusted, the protection effect is good, operation is easy and convenient, and the construction efficiency and quality are effectively improved.

Description

Technical Field

[0001] The invention belongs to the technical field of building construction, and particularly relates to a grinding device for a concrete floor slab ceiling in building construction. Background Art

[0002] High-rise cast-in-place concrete structures generally use wooden formwork or standard aluminum formwork to cast floor slabs. During the concrete pouring, a small amount of concrete slurry will leak from the joints of the formwork after being vibrated by a vibrating rod. After the formwork is removed, the ceiling surface will usually be uneven and rough, affecting the construction quality and aesthetics of the subsequent decoration and renovation project. In order to obtain a flat and smooth ceiling surface, the concrete floor slab ceiling needs to be polished.

[0003] At present, the grinding of concrete floor ceilings is generally carried out by transmission manual grinding. The traditional manual grinding method has high labor intensity and low efficiency. Affected by the height of the ceiling, it is necessary to set up scaffolding for high-altitude work during the grinding operation, which is not only risky, but also requires repeated dismantling and setting up of scaffolding as the grinding area moves, seriously affecting work efficiency. Moreover, when construction workers are grinding with hand-held angle grinders, since they are too close to the ceiling, the concrete particles produced by grinding can easily splash and cause harm to the construction workers, endangering their health. Summary of the invention

[0004] In view of the defects and problems existing in the existing concrete floor ceiling grinding, the present invention provides a concrete floor ceiling grinding device for construction. The device has a unique structure and ingenious design. Through the integrated design of a lifting frame, a linkage protective cover, and a dust suction mechanism, the grinding height is adjustable, the protective effect is good, and the operation is simple, thereby effectively improving the construction efficiency and quality.

[0005] The solution adopted by the present invention to solve the technical problem is: a concrete floor ceiling grinding device for construction, comprising a base, on which are provided a column, a linkage protective cover, a dust suction mechanism, a connecting rod group and a driving frame, the column is vertically fixed on the base, and a supporting seat is fixed on the base on the front side of the column; The lifting column comprises a support column and a lifting rod. The support seat is placed vertically on the support seat, and the support column is connected with the column through a connecting rod group to form a parallelogram structure lifting frame. The control end of the lifting frame is located at the rear side of the column. The driving frame is arranged at the rear side of the column, and the bottom end of the driving frame is hinged to the column. When the driving frame flips downward around the bottom end, it will press down the control end of the lifting frame, driving the support column to move upward and parallel around the connection of the column; the lifting rod is fixedly installed vertically on the top of the support column, and a grinding mechanism is installed on the top of the lifting rod; The linked protective cover includes an umbrella cover assembly, a brake wire seat and a brake wire. The umbrella cover assembly is matched and installed on the lifting rod, and the umbrella cover assembly is in a folded state in a natural state. The brake wire seat is installed on the top of the column. One end of the brake wire is connected to the umbrella cover assembly, and the other end of the brake wire is connected to the driving frame via the brake wire seat. When the driving frame flips downward around the bottom end, the brake wire will drive the umbrella cover assembly to move up and unfold, forming an inverted cone cover body with an opening facing upward under the grinding mechanism. A dust suction pipe is installed at the suction end of the dust suction mechanism, and the other end of the dust suction pipe is connected to the inside of the umbrella cover assembly.

[0006] The connecting rod group includes parallel connecting rods symmetrically arranged on the left and right sides of the supporting column, the parallel connecting rods include an upper connecting rod and a lower connecting rod arranged at vertical parallel intervals, the front and rear ends of the upper connecting rod are respectively hinged to the supporting column and the column, the front and rear ends of the lower connecting rod are also respectively hinged to the supporting column and the column, the rear end of the lower connecting rod is fixedly connected to the extension rod, the tail end of the extension rod extends backward to the rear side of the column, the extension rod is located below the driving frame, and the extension rod is within the rotation trajectory of the driving frame rotating downward.

[0007] The driving frame includes a handle rod, a pressure rod and two driving rods. The two driving rods are symmetrically arranged on the left and right sides of the column, and the two driving rods are located on the outside of the lower connecting rod on the same side. The bottom end of the driving rod is hinged to the column, and the top ends of the two driving rods are connected together through the handle rod. The pressure rod is arranged between the two driving rods and is located above the extension rod. The left and right ends of the pressure rod are respectively fixedly connected to the driving rod on the same side, and the extension rod is within the rotation trajectory of the pressure rod around the bottom end of the driving rod.

[0008] The grinding mechanism comprises a fixing seat fixedly connected to the top end of the lifting rod, a plurality of grinding motors are arranged and installed on the fixing seat, and a grinding disc is arranged and installed on the motor shaft of the grinding motor.

[0009] The umbrella cover assembly includes a sliding sleeve, a limiting sleeve, a fixing sleeve, ribs and an umbrella surface. The fixing sleeve, the limiting sleeve and the sliding sleeve are spaced apart on the lifting rod from top to bottom, and the fixing sleeve and the limiting sleeve are fixedly connected to the lifting rod. The sliding sleeve can slide up and down along the lifting rod. A plurality of ribs are evenly spaced along the circumferential direction on the outside of the sliding sleeve. The sliding sleeve is connected to the fixing sleeve through the ribs arranged along the circumference, and the sliding sleeve is connected to the limiting sleeve through a brake line.

[0010] The umbrella ribs include long bone rods and short bone rods. The bottom end of the long bone rod is hinged with the sliding sleeve, the long bone rod is fixedly connected to the inner end surface of the umbrella surface, one end of the short bone rod is hinged with the fixing sleeve, and the other end is hinged with the long bone rod.

[0011] The gate wire comprises a gate wire outer layer and a core wire. The gate wire outer layer is a spiral metal layer that can be bent but not stretched, and the core wire is a steel wire rope. One end of the outer side of the gate wire is fixedly installed in a gate wire seat, and the other end of the outer side of the gate wire passes through the umbrella surface and is fixedly connected to the sliding sleeve. One end of the core wire passes through the gate wire seat and is fixedly connected to an end of the driving frame away from the column, and the other end of the core wire passes upward through the sliding seat and is fixedly connected to the limit sleeve.

[0012] The four bottom corners of the base are matched with movable wheels.

[0013] Beneficial effects of the invention: The invention provides a grinding device for a concrete floor slab ceiling in a building construction, which has the following beneficial effects: The concrete floor ceiling grinding device for construction provided by the present invention adopts a parallelogram lifting frame structure composed of support columns and lifting rods, and cooperates with the design of a driving frame and a connecting rod group, so that the height of the grinding mechanism can be flexibly adjusted to adapt to concrete floor ceilings of different heights, thereby expanding the application range of the equipment.

[0014] The present invention provides a concrete floor ceiling grinding device for building construction, which utilizes a linkage protective cover composed of an umbrella cover assembly, a gate wire seat and a gate wire. When the grinding mechanism is working, it can automatically unfold to form an inverted cone-shaped cover body, effectively control the debris and dust generated by grinding, prevent environmental pollution, improve the construction working environment, and protect the health of construction personnel.

[0015] The present invention provides a concrete floor ceiling polishing device for construction. The dust suction mechanism is connected to the inside of the umbrella cover assembly, and the debris falling into the inverted cone cover body is sucked away in time, reducing the secondary cleaning work. The design of the dust cover greatly improves the dust collection efficiency.

[0016] The present invention provides a concrete floor ceiling grinding device for building construction. Through a simple action of pressing down a driving frame, linkage control of umbrella cover deployment, grinding mechanism lifting and dust collection function can be realized simultaneously. The operation is simple and convenient, and the labor intensity is reduced.

[0017] The present invention provides a concrete floor ceiling grinding device for construction. The parallelogram lifting frame structure is compactly arranged, which reduces the overall height of the equipment. The dust suction mechanism, the linkage protective cover and the grinding mechanism are integrated in design, with modular functions and a reasonable structure, which is convenient for movement and use at the construction site. The integrated grinding mechanism can efficiently complete the grinding of the concrete ceiling, and cooperates with the dust prevention and dust collection functions, thereby ensuring the construction quality while improving the construction efficiency and reducing rework and quality problems. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0019] Figure 2 It is a schematic diagram of the lifting frame structure of the present invention.

[0020] Figure 3 It is a schematic diagram of the structure of the drive frame of the present invention.

[0021] Figure 4 It is a schematic diagram of the structure of the linkage protective cover of the present invention.

[0022] Figure 5 It is a schematic diagram of the structure of the brake wire seat of the present invention.

[0023] Figure 6 It is a schematic diagram of the connection of the gate wire of the present invention.

[0024] Figure 7 It is a schematic diagram of the unfolding process of the umbrella cover assembly of the present invention.

[0025] Figure 8 It is a schematic diagram of the support column structure of the present invention.

[0026] Fig. 9 It is a schematic diagram of the installation position of the ejection block of the present invention.

[0027] In the figure, the numbers are: 1 is the base, 11 is the support seat, 3 is the lifting column, 31 is the support column, 311 is the support column body, 313 is the buffer piston, 312 is the piston rod, and 314 is the safety cylinder 32 is a lifting rod, 4 is a linkage protective cover, 41 is an umbrella cover assembly, 411 is a sliding sleeve, 412 is a limiting sleeve, 413 is a fixing sleeve, 414 is a long bone rod, 415 is a short bone rod, 42 is a brake wire seat, 43 is a brake wire, 431 is a brake wire outer layer, 432 is a core wire, 5 is a grinding mechanism, 51 is a fixing seat, 52 is a motor, 53 is a grinding disc, a lifting frame, 6 is a parallel connecting rod, 61 is an upper connecting rod, 62 is a lower connecting rod, 63 is an extension rod, 7 is a dust suction mechanism, 71 is a dust suction pipe, 8 is a driving frame, 81 is a driving rod, 82 is a handle rod, 83 is a rope seat, 84 is a pressure rod, 91 is a push-up block, 92 is a walking rod, and 93 is a shifting rod. DETAILED DESCRIPTION

[0028] The present invention is further described below in conjunction with the accompanying drawings and embodiments. Example

[0029] This embodiment provides a construction concrete floor ceiling grinding device, such as Figure 1-7As shown, it includes a base 1, and the four bottom corners of the base 1 are matched with moving wheels, and the base 1 can be moved to adjust the position of the device; the base 1 is provided with a column 2, a linkage protective cover 4, a dust suction mechanism 7, a connecting rod group and a driving frame 8, the column 2 is vertically fixed on the base 1, and a support seat 11 is fixed on the base 1 on the front side of the column 2, and the support seat 11 is used to support the lifting column 3 when the device is not in use; there are many ways to fix the column 2 on the base 1, for example, a connecting plate is welded to the bottom of the column 2, and the connecting plate is fixed to the base 1 by high-strength bolts.

[0030] The lifting column 3 includes a support column 31 and a lifting rod 32. The support base 11 is placed vertically on the support base 11, and the support column 31 is connected with the column 2 through a connecting rod group to form a parallelogram structure lifting frame. The control end of the lifting frame is located at the rear side of the column 2. When the control end of the lifting frame is pressed down, the support column 31 will be driven to move upward in parallel around the connection of the column 2. Specifically: The connecting rod group includes parallel connecting rods 6 symmetrically arranged on the left and right sides of the support column 31, and the parallel connecting rod 6 includes an upper connecting rod 61 and a lower connecting rod 62 arranged at a vertical parallel interval. The front and rear ends of the upper connecting rod 61 are respectively hinged to the support column 31 and the column 2, and the front and rear ends of the lower connecting rod 62 are also respectively hinged to the support column 31 and the column 2, so that the support column 31 is connected to the column 2 through the connecting rod group to form a parallelogram structure lifting frame, and the rear end of the lower connecting rod 62 is fixedly connected to the extension rod 63, and the tail end of the extension rod 63 extends backward to the rear side of the column 2. The extension rod 63 is the control end of the lifting frame. When the extension rod 63 is pressed down, the lower connecting rod 62 will be driven to flip upward around the tail end, thereby driving the entire parallelogram structure lifting frame to deform, so that the support column 31 moves upward and parallel around the connection with the column 2, thereby controlling the height of the support column 31.

[0031] The driving frame 8 is arranged at the rear side of the column 2, and the bottom end of the driving frame 8 is hinged to the column 2. When the driving frame 8 turns downward around the bottom end, it will press down the control end of the lifting frame, driving the support column 31 to move upward parallel around the connection of the column 2. Specifically, the extension rod 63 is located below the driving frame 8, and the extension rod 63 is within the rotation trajectory of the driving frame 8 rotating downward. The driving frame 8 includes a handle bar 82, a pressure bar 84 and two driving bars 81. The two driving bars 81 are symmetrically arranged on the left and right sides of the column 2, and the two driving bars 81 are both located on the outside of the lower connecting rod 62 on the same side. The bottom end of the driving bar 81 is hinged to the column 2, and the top ends of the two driving bars 81 are connected together through the handle bar 82. The pressure bar 84 is arranged between the two driving bars 81 and is located above the extension bar 63. The left and right ends of the pressure bar 84 are respectively fixedly connected to the driving bars 81 on the same side. When the driving bars 81 are around the bottom end, When rotating, the pressure rod 84 will be driven to rotate synchronously around the bottom end of the driving rod 81, and the extension rod 63 is within the rotation trajectory of the pressure rod 84 around the bottom end of the driving rod 81, so that when the two driving rods 81 are driven to rotate downward synchronously by the handle rod 82, during the downward rotation of the two driving rods 81, the pressure rod 84 will contact with the extension rod 63 and press down to drive the lower connecting rod 62 to flip upward around the tail end, thereby driving the entire parallelogram structure lifting frame to deform, causing the support column 31 to move upward and parallel around the connection between the column 2.

[0032] The lifting rod 32 is fixedly installed vertically on the top of the supporting column 31, and a grinding mechanism 5 is installed on the top of the lifting rod 32. The grinding mechanism 5 is used to grind the concrete floor ceiling. The grinding mechanism 5 includes a fixing seat 51 fixedly connected to the top of the lifting rod 32, and a plurality of grinding motors 52 are arranged and installed on the fixing seat 51. The motor 52 rotating shaft of the grinding motor 52 is arranged and installed with a grinding disk 53 upward. When the parallelogram structure lifting frame is driven by the driving frame 8 to deform, the supporting column 31 moves upward parallel to the connection between the column 2, and the lifting rod 32 will be lifted synchronously with the supporting column 31. Therefore, when in use, the construction personnel on the ground can adjust the height of the grinding mechanism 5 according to the height of the concrete floor ceiling through the cooperation of the driving frame 8 and the lifting frame, and perform grinding operations on the concrete floor ceiling on the ground. There is no need for construction personnel to work at high altitude, and it is suitable for concrete floor ceilings of different heights, which expands the application range of the device, not only reduces the work risk, but also improves the efficiency of the grinding operation.

[0033] The linkage protective cover 4 includes an umbrella cover assembly 41, a brake wire 43 seat 42 and a brake wire 43. The umbrella cover assembly 41 is matched and installed on the lifting rod 32, and the umbrella cover assembly 41 is in a folded state in a natural state. The brake wire 43 seat 42 is installed at the top of the column 2. One end of the brake wire 43 is connected to the umbrella cover assembly 41, and the other end of the brake wire 43 is connected to the driving frame 8 through the brake wire 43 seat 42. When the driving frame 8 turns downward around the bottom end, the umbrella cover assembly 41 will be driven by the brake wire 43 to move up and unfold, forming an inverted cone cover body with an opening facing upward below the grinding mechanism 5. Specifically: like Figure 3-7As shown, the umbrella cover assembly 41 includes a sliding sleeve 411, a limiting sleeve 412, a fixing sleeve 413, an umbrella rib and an umbrella surface. The fixing sleeve 413, the limiting sleeve 412 and the sliding sleeve 411 are spaced from top to bottom on the lifting rod 32, and the fixing sleeve 413 and the limiting sleeve 412 are fixedly connected to the lifting rod 32. The sliding sleeve 411 can slide up and down along the lifting rod 32. A plurality of umbrella ribs are evenly spaced along the circumferential direction on the outer side of the sliding sleeve 411. The sliding sleeve 411 is connected to the fixing sleeve 413 through the umbrella ribs arranged along the circumference. The umbrella ribs include long bone rods 414 and short bone rods 415. The long bone rods 414 and the short bone rods 415 are fixedly connected to the lifting rod 32. The bottom end of the rod 414 is hinged to the sliding sleeve 411, the long bone rod 414 is fixedly connected to the inner end surface of the umbrella surface, one end of the short bone rod 415 is hinged to the fixed sleeve 413, and the other end is hinged to the long bone rod 414, the sliding sleeve 411 is connected to the limiting sleeve 412 through the gate line 43, when the driving frame 8 flips downward around the bottom end, the gate line 43 will drive the sliding sleeve 411 to slide upward, during the upward sliding process of the sliding sleeve 411, the long bone rod 414 will flip outward around the bottom end under the support of the short bone rod 415 to open the umbrella surface, thereby forming an inverted cone cover with an opening facing upward under the grinding mechanism 5.

[0034] The gate wire 43 includes a gate wire outer layer 431 and a core wire 432. The gate wire outer layer 431 is a spiral metal layer that can be bent but not stretched, and the core wire 432 is a steel wire rope. One end of the outer side of the gate wire 43 is fixedly installed in the gate wire 43 seat 42, and the other end of the outer side of the gate wire 43 passes through the umbrella surface and is fixedly connected to the sliding sleeve 411. One end of the core wire 432 passes through the gate wire 43 seat 42 and is fixedly connected to the end of the driving frame 8 away from the column 2, and the other end of the core wire 432 passes upward through the sliding seat and is fixedly connected to the limiting sleeve 412. When the driving frame 8 flips downward around the lower end, it will pull the core wire 432 to drive the sliding sleeve 411 to slide upward to reduce the distance between the sliding sleeve 411 and the limiting sleeve 412, thereby using the umbrella ribs to open the umbrella surface.

[0035] A dust suction pipe 71 is installed at the suction end of the dust suction mechanism 7, and the other end of the dust suction pipe 71 is connected to the inside of the umbrella cover assembly 41. The dust suction mechanism 7 is an existing vacuum cleaner, which will generate negative pressure suction when in use. The structure is not described in detail here. When in use, the driving frame 8 is driven to flip downward around the bottom end by pressing down the far end of the driving frame 8, which can not only control the umbrella cover assembly 41 to move upward and unfold to form an inverted cone cover body with an opening facing upward under the grinding mechanism 5, but also drive the support column 31 to move upward and parallel around the connection between the column 2 to lift the grinding mechanism 5 so that it is in contact with the concrete floor ceiling, which is suitable for grinding operations of concrete floor ceilings of different heights. The debris generated in the process of grinding the concrete floor ceiling using the grinding mechanism 5 will fall directly into the inverted cone cover body, and the debris will be sucked away by the dust suction mechanism 7 after falling along the inverted cone cover body to the bottom of the umbrella cover assembly 41. Example

[0036] The difference between Example 2 and Example 1 is that Figure 8As shown, the support column includes a supporting body 311, and the supporting body 311 is connected with the column 2 through a connecting rod group to form a parallelogram structure lifting frame. A buffer cavity is vertically arranged inside the supporting body, and a buffer piston 313 is matched and installed. The buffer piston divides the buffer cavity into a through cavity connected to the outside world on the upper side and a sealed cavity in a sealed state on the lower side; the buffer cavity on the lower side of the buffer piston is in a sealed state; a piston rod 312 is vertically installed on the top of the buffer piston, and the top end of the piston rod 312 extends upward to support the body and is vertically connected to the bottom end of the lifting rod. A top spring is matched and installed in the buffer cavity below the buffer piston. The top spring will push the buffer piston upward in a natural state to keep the piston rod in an extended state, and a safety cylinder is fixedly installed on one side of the piston rod extending to support the body. The safety cylinder is a single-acting cylinder safety cylinder extended by gas injection. Cylinder, the piston rod of the safety cylinder is set downward, and the buffer chamber on the lower side of the buffer piston 313 is connected with the inlet and outlet holes of the safety cylinder through the air pipe. When the support column is lifted during use, the top of the grinding mechanism will be connected with the piston chamber above the piston in the cylinder body. During the process of lifting the support column for grinding, when the lifting force is too large, the buffer piston in the supporting body will move down and compress the top spring, thereby preventing the problem of excessive grinding caused by excessive pressure. As the buffer piston moves downward, the buffer piston will discharge the air in the lower buffer chamber into the safety cylinder. When the piston rod of the safety cylinder collides with the top of the supporting body, the support column will lose its buffering function. Therefore, when encountering a higher protrusion during the grinding process, continuing to lift the supporting body to make the support column lose its buffering function, and then continuing to lift the supporting column body can increase the pressure between the grinding disc and the ceiling, thereby quickly grinding the protrusion. Example

[0037] The difference between the embodiment and embodiment 2 is that Fig. 9 As shown, a push block is matched on the outer ring surface of the grinding disc, and a driving inclined surface is matched at the end of the push block on the counterclockwise side, and a walking assembly is matched and installed on the fixed seat on one side of each grinding disc, and the walking assembly includes a right-angle frame fixedly installed on the fixed seat, and a right-angle clamp is provided with a fixed shaft at one end of the right-angle clamp facing the grinding disc, and a walking rod is rotatably mounted on the fixed shaft, and the walking rod is kept horizontally and forwardly arranged in a natural state, and the walking rod is located above the push block, and a lever is matched on the bottom surface of the rear end of the walking rod, and the lever is located in the moving track of the driving inclined surface of the push block. When the push block follows the grinding disc to rotate counterclockwise through the walking rod, the driving inclined surface of the push block will conflict with the lever, and the push lever drives the walking rod to rotate counterclockwise around the fixed axis and conflict with the ceiling, thereby moving the fixed seat forward once. When in use, the grinding disc applies an auxiliary power to move forward to the fixed seat through the walking rod every time it rotates one circle.

[0038] It should be understood that the above specific embodiments of the present invention are only used to illustrate or explain the principles of the present invention, and do not constitute a limitation of the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. In addition, the appended claims of the present invention are intended to cover all changes and modifications that fall within the scope and boundaries of the appended claims, or the equivalent forms of such scope and boundaries.

Claims

1. A construction concrete floor ceiling grinding device, comprising a base, characterized in that: The base is provided with a column, a linkage protective cover, a dust suction mechanism, a connecting rod group and a driving frame. The column is vertically fixed on the base, and a support seat is fixed on the base on the front side of the column; The lifting column comprises a support column and a lifting rod, the support seat is placed vertically on the support seat, and the support column is connected with the column through a connecting rod group to form a parallelogram structure lifting frame, the control end of the lifting frame is located at the rear side of the column, the driving frame is arranged at the rear side of the column, and the bottom end of the driving frame is hinged with the column, when the driving frame flips downward around the bottom end, it will press down the control end of the lifting frame, driving the support column to move upward and parallel around the connection of the column; the lifting rod is fixedly installed vertically on the top of the support column, and a grinding mechanism is installed on the top of the lifting rod; The linkage protective cover includes an umbrella cover assembly, a brake wire seat and a brake wire. The umbrella cover assembly is matched and installed on the lifting rod, and the umbrella cover assembly is in a folded state in a natural state. The brake wire seat is installed on the top of the column. One end of the brake wire is connected to the umbrella cover assembly, and the other end of the brake wire is connected to the driving frame via the brake wire seat. When the driving frame flips downward around the bottom end, the brake wire will drive the umbrella cover assembly to move up and unfold, forming an inverted cone cover body with an opening facing upward under the grinding mechanism. The suction end of the dust suction mechanism is equipped with a dust suction pipe, and the other end of the dust suction pipe is connected to the inside of the umbrella cover assembly.

2. The construction concrete floor ceiling grinding device according to claim 1 is characterized in that: The connecting rod group includes parallel connecting rods symmetrically arranged on the left and right sides of the supporting column, the parallel connecting rods include an upper connecting rod and a lower connecting rod arranged at vertical parallel intervals, the front and rear ends of the upper connecting rod are respectively hinged to the supporting column and the column, the front and rear ends of the lower connecting rod are also respectively hinged to the supporting column and the column, the rear end of the lower connecting rod is fixedly connected to the extension rod, the tail end of the extension rod extends backward to the rear side of the column, the extension rod is located below the driving frame, and the extension rod is within the rotation trajectory of the driving frame rotating downward.

3. The construction concrete floor ceiling grinding device according to claim 2 is characterized in that: The driving frame includes a handle rod, a pressure rod and two driving rods. The two driving rods are symmetrically arranged on the left and right sides of the column, and the two driving rods are located on the outside of the lower connecting rod on the same side. The bottom end of the driving rod is hinged to the column, and the top ends of the two driving rods are connected together through the handle rod. The pressure rod is arranged between the two driving rods and is located above the extension rod. The left and right ends of the pressure rod are respectively fixedly connected to the driving rod on the same side, and the extension rod is within the rotation trajectory of the pressure rod around the bottom end of the driving rod.

4. The construction concrete floor ceiling grinding device according to claim 1, characterized in that: The grinding mechanism comprises a fixing seat fixedly connected to the top end of the lifting rod, a plurality of grinding motors are arranged and installed on the fixing seat, and a grinding disc is arranged and installed on the motor shaft of the grinding motor.

5. The construction concrete floor ceiling grinding device according to claim 1, characterized in that: The umbrella cover assembly includes a sliding sleeve, a limiting sleeve, a fixing sleeve, ribs and an umbrella surface. The fixing sleeve, the limiting sleeve and the sliding sleeve are spaced apart on the lifting rod from top to bottom, and the fixing sleeve and the limiting sleeve are fixedly connected to the lifting rod. The sliding sleeve can slide up and down along the lifting rod. A plurality of ribs are evenly spaced along the circumferential direction on the outside of the sliding sleeve. The sliding sleeve is connected to the fixing sleeve through the ribs arranged along the circumference, and the sliding sleeve is connected to the limiting sleeve through a brake line.

6. The construction concrete floor ceiling grinding device according to claim 5, characterized in that: The umbrella ribs include long bone rods and short bone rods. The bottom end of the long bone rod is hinged with the sliding sleeve, the long bone rod is fixedly connected to the inner end surface of the umbrella surface, one end of the short bone rod is hinged with the fixing sleeve, and the other end is hinged with the long bone rod.

7. The construction concrete floor ceiling grinding device according to claim 5, characterized in that: The gate wire comprises a gate wire outer layer and a core wire. The gate wire outer layer is a spiral metal layer that can be bent but not stretched, and the core wire is a steel wire rope. One end of the outer side of the gate wire is fixedly installed in a gate wire seat, and the other end of the outer side of the gate wire passes through the umbrella surface and is fixedly connected to the sliding sleeve. One end of the core wire passes through the gate wire seat and is fixedly connected to an end of the driving frame away from the column, and the other end of the core wire passes upward through the sliding seat and is fixedly connected to the limit sleeve.

8. The construction concrete floor ceiling grinding device according to claim 1, characterized in that: The four bottom corners of the base are matched with movable wheels.

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