Portable core drilling machine loading and unloading device

Abstract

The utility model relates to the technical field of pavement engineering detection experiment devices, in particular to a portable core drilling machine loading and unloading device. Comprising a support of a frame structure and a chain block arranged at the upper end of the support, the support comprises two front stand columns arranged in parallel, two rear stand columns arranged in parallel, a cross beam fixedly connected between the two front stand columns or the two rear stand columns, and longitudinal beams fixedly connected between the front stand columns and the rear stand columns; a telescopic rod capable of stretching out and drawing back downwards is installed on the front stand column, a front walking wheel is installed at the lower end of the telescopic rod, and rear walking wheels are installed at the lower ends of the two rear stand columns. The device is firm in structure and convenient to use, manual carrying is not needed when the concrete coring machine is loaded and unloaded, labor can be saved, personnel safety is guaranteed, the requirement for the height of a transport carriage is not limited to the lifting amplitude of a working platform of the coring machine any more, and adaptability is high.

Description

Technical Field

[0001] The utility model relates to the technical field of pavement engineering detection experimental devices, and more specifically, to a portable coring machine loading and unloading device. Background Art

[0002] A coring machine, also known as a concrete coring machine, is primarily used for coring cement concrete, asphalt concrete, and limestone foundations in highways, airports, ports, docks, dams, and other locations for compression and flexural testing. It is a commonly used instrument in pavement engineering and a crucial piece of equipment in pavement construction inspections. The main body of the coring machine consists of a power unit and a drill driven by the power unit, mounted on a liftable work platform. The entire machine is heavy, and although casters are provided on the bottom for pushing on flat ground, the large height difference between the vehicle compartment and the ground requires multiple people to lift the coring machine from the vehicle compartment to the ground, or vice versa, during loading and unloading. This wastes manpower and poses certain safety risks. In addition, Chinese patent 2024200283387 discloses "A road coring machine getting on and off auxiliary equipment", and the authorization announcement number is CN221758931U. The equipment includes two columns, two bases, two positioning components and two supporting arms. The columns are formed by integrally connecting vertical channel steel and bevel channel steel, and an upper support rod is fixedly connected between the two bevel channel steels; the two bases are respectively arranged at the bottom ends of the two vertical channel steels, and one end of the base is hingedly installed at the bottom end of the vertical channel steel. The utility model supports the main shaft sliding seat of the road coring machine through two supporting arms, and the rotation of the lead screw is driven by the operating handle. When the main shaft sliding seat is supported and immovable, the walking mechanism of the road coring machine moves up and down, and then the walking mechanism contacts the ground or corresponds to the car box, thereby completing the getting on or off or loading operation of the road coring machine. The auxiliary device uses the drop of the lifting platform of the coring machine when it is raised and lowered to fill the drop between the car box and the ground, thereby realizing the loading and unloading of the coring machine. However, in most cases, the maximum lifting range of the core drilling machine lifting platform is much smaller than the height difference between the car body and the ground, making it impossible to load and unload the car smoothly. Summary of the Invention

[0003] The utility model aims to provide a portable coring machine loading and unloading device which has a firm structure and strong adaptability to the height difference of a carriage.

[0004] The technical solution adopted by the present invention to solve the technical problem is:

[0005] The portable coring machine loading and unloading device described in the utility model includes a frame structure bracket and a hand winch arranged at the upper end of the bracket. The bracket includes two parallel front columns, two parallel rear columns, a cross beam fixedly connected between the two front columns or between the two rear columns, and a longitudinal beam fixedly connected between the front columns and the rear columns; a telescopic rod that can be extended downward is installed on the front column, and the lower end of the telescopic rod is installed with a front walking wheel, and the lower ends of the two rear columns are installed with rear walking wheels.

[0006] Through this solution, the device has a firm structure and does not require manual lifting when loading and unloading the concrete coring machine, which can save labor and ensure personnel safety. The requirement for the carriage height is no longer limited to the lifting range of the coring machine working platform, and it has strong adaptability.

[0007] Preferably, the front column is a tubular structure with an open lower end, the telescopic rod is sleeved in the inner cavity of the front column, the telescopic rod is provided with a radially installed positioning pin, and the side wall of the front column is provided with a plurality of positioning holes adapted to the positioning pins, and the plurality of positioning holes are evenly spaced along the length direction of the front column.

[0008] With this solution, the telescopic rod can be extended and retracted at the lower end of the front column and fixed at a suitable height by a positioning pin.

[0009] Preferably, the length of the front pillar is smaller than that of the rear pillar; the longitudinal beam includes an upper longitudinal beam fixedly connected to the upper ends of the front pillar and the rear pillar and a lower longitudinal beam fixedly connected to the lower ends of the front pillar and the rear pillar, and the front end of the lower longitudinal beam has an upwardly inclined bending section.

[0010] With this solution, a space is reserved at the lower end of the front column to accommodate the telescopic rod, and when the telescopic rod is retracted, the front and rear ends of the bracket can be kept horizontal and stable.

[0011] Preferably, the lower end of the telescopic rod is connected to the front walking wheel through a screw, and a fastening nut is threadedly installed on the screw; the lower end surface of the telescopic rod is provided with an internal threaded hole adapted to the screw, and the upper end of the screw is installed in the internal threaded hole.

[0012] Through this solution, the height between the telescopic rod and the front running wheel can be fine-tuned, which makes up for the deficiency of the telescopic rod height adjustment.

[0013] Preferably, the front running wheels and the rear running wheels are fixed casters with locking mechanisms.

[0014] Through this solution, the travel wheels can be locked when loading and unloading the coring machine, thereby improving the stability of the bracket and preventing the bracket from slipping.

[0015] Due to the adoption of the above structure, the device has a firm structure and is easy to use. No manual lifting is required when loading and unloading the concrete coring machine, which can save labor and ensure personnel safety. The requirement for the height of the transport compartment is no longer limited to the lifting range of the coring machine working platform, and it has strong adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

[0017] Figure 1 It is a three-dimensional structural diagram of an embodiment of the utility model.

[0018] Figure 2 It is a schematic diagram of the cross-sectional structure of the lower end of the front pillar.

[0019] Figure 3 This is a schematic diagram of the usage status when loading and unloading the coring machine. DETAILED DESCRIPTION

[0020] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present invention, its application, or uses.

[0021] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0022] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0023] It should be noted that like reference numerals and letters refer to like items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0024] like Figure 1As shown, the portable coring machine loading and unloading device described in the present invention includes a frame structure bracket 1 and a hand chain hoist 2 arranged at the upper end of the bracket 1. The bracket 1 is made of square steel or steel pipe welded together. The bracket 1 includes two parallel front columns 3, two parallel rear columns 4, a crossbeam 5 fixedly connected between the two front columns 3 or between the two rear columns 4, and a longitudinal beam 6 fixedly connected between the front columns 3 and the rear columns 4; the longitudinal beam 6 includes an upper longitudinal beam fixedly connected to the upper ends of the front columns 3 and the rear columns 4 and a lower longitudinal beam 61 fixedly connected to the lower ends of the front columns 3 and the rear columns 4. There are two upper longitudinal beams and two lower longitudinal beams 61. The upper longitudinal beams are located on both sides of the upper end of the bracket 1, and the lower longitudinal beams 61 are located on both sides of the lower end of the bracket 1. In addition, the crossbeam 5 includes an upper crossbeam and a lower crossbeam. The two upper crossbeams are respectively located at the front and rear sides of the upper end of the bracket 1. There is only one lower crossbeam 51, which is located at the front or rear side of the lower end of the bracket 1, thereby leaving the rear or front side of the bracket 1 open to facilitate the entry and exit of the coring machine. In this embodiment, the lower crossbeam 51 is located at the rear side of the lower end of the bracket 1 and is fixedly connected between the lower ends of the two rear columns 4, forming an opening at the front end of the bracket 1 to facilitate the entry and exit of the coring machine.

[0025] The front column 3 is provided with a telescopic rod 7 that can be extended downward. The lower end of the telescopic rod 7 is provided with a front running wheel 71. The lower ends of the two rear columns 4 are provided with rear running wheels 41. The front running wheels 71 and the rear running wheels 41 are fixed casters with a locking mechanism, so that the support 1 can be moved by the rotation of the running wheels, and the running wheels can be locked so that they cannot rotate, thereby maintaining the stability of the support 1.

[0026] As a further improvement of the present invention, Figure 2 As shown, the front column 3 is a tubular structure with an open lower end. The front column 3 can be a square tube or a round tube. The telescopic rod 7 is mounted in the inner cavity of the front column 3. The telescopic rod 7 is provided with a radially mounted positioning pin 8. A detachable plug-in structure is adopted between the positioning pin 8 and the telescopic rod 7. The side wall of the front column 3 is provided with a plurality of positioning holes 9 adapted to the positioning pin 8. The plurality of positioning holes 9 are evenly spaced along the length of the front column 3. After the positioning pin 8 is pulled out from the pin hole on the telescopic rod 7, the telescopic rod 7 can move axially in the front column 3 to achieve telescoping in the front column 3. After the pin hole on the telescopic rod 7 is aligned with one of the positioning holes 9 on the positioning pin 8, the positioning pin 8 is inserted into the positioning hole 9 and the pin hole on the telescopic rod 7 to fix the position of the telescopic rod 7.

[0027] In addition, the lower end of the telescopic rod 7 can be directly mounted with the front running wheel 71. Figure 2As shown, the lower end of the telescopic rod 7 is connected to the front running wheel 71 via a screw 72, and a fastening nut 73 is threadedly mounted on the screw 72. Rotating the fastening nut 73 can change its position on the screw 72. The lower end surface of the telescopic rod 7 is provided with an internally threaded hole adapted for the screw 72, and the upper end of the screw 72 is mounted within the internally threaded hole. If the telescopic rod 7 is a solid rod, an internally threaded hole can be directly created at the lower axis of the telescopic rod 7 using a tap. If the telescopic rod 7 is a hollow rod, an internally threaded sleeve adapted for the screw 72 can be welded to the inner cavity of the telescopic rod 7. Rotating the screw 72 can adjust the length of the screw 72 retracted into the internally threaded hole, thereby fine-tuning the distance between the lower end of the front column 3 and the front running wheel 71. After adjusting the screw 72, tightening the fastening nut 73 locks the screw 72 to prevent it from loosening.

[0028] As a further improvement of this embodiment, the length of the front column 3 is smaller than the rear column 4. When the telescopic rod 7 is retracted into the front column 3 to the shortest position, the sum of the lengths of the front column 3 and the telescopic rod 7 remaining outside the front column 3 is exactly equal to the rear column 4. This ensures that when the telescopic rod 7 is retracted into the front column 3, the front and rear ends of the bracket 1 are equal in height and can stand stably. To adapt to the situation where the length of the front column 3 is smaller than the rear column 4, the front end of the lower end longitudinal beam 61 has an upwardly inclined bent section 62.

[0029] like Figure 3 As shown, taking unloading as an example, when in use, on the carriage 11, first retract the telescopic rod 7 into the front column 3, align the opening at the front end of the bracket 1 with the coring machine 10, push the bracket 1 to put the coring machine 10 into the inner cavity of the bracket 1, and then use the hand hoist 2 to lift the coring machine 10 off the carriage board. At this time, pushing the bracket 1 can drive the coring machine 10 to move together, push the front end of the bracket 1 to the edge of the carriage board, and the staff holds the front end of the bracket 1 and continues to push the bracket 1 to move the front column 3 to the edge of the carriage board. Outside but the rear column 4 is still on the car body board, quickly extend the telescopic rod 7, make the front running wheel 71 contact the ground and lock the telescopic rod 7, continue to push the bracket 1 so that the rear column 4 and the rear running wheel 41 are located at the edge of the car body board but will not fall out of the car body board; at this time, confirm that the core removing machine 10 hanging on the hand hoist 2 is already outside the car body board, lock the rear running wheel 41 and the front running wheel 71, operate the hand hoist 2 to put the core removing machine 10 to the ground, and finally remove the hand hoist 2 and put away the bracket 1.

[0030] The structure and use of the hand chain hoist 2 are well-known technologies and will not be further described here.

[0031] Although some specific embodiments of the present invention have been described in detail above through specific examples, those skilled in the art should understand that the above examples are for illustration only and are not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that the above examples may be modified without departing from the scope and spirit of the present invention. The scope of protection of the present invention is defined by the appended claims.

Claims

1. A portable coring machine loading and unloading device, comprising a frame structure bracket (1), a hand chain hoist (2) arranged at the upper end of the bracket (1), characterized in that: The bracket (1) comprises two parallel front columns (3), two parallel rear columns (4), a crossbeam (5) fixedly connected between the two front columns (3) or between the two rear columns (4), and a longitudinal beam (6) fixedly connected between the front columns (3) and the rear columns (4); a telescopic rod (7) that can be telescoped downward is installed on the front column (3), and a front running wheel (71) is installed at the lower end of the telescopic rod (7); and rear running wheels (41) are installed at the lower ends of the two rear columns (4).

2. A portable coring machine loading and unloading device according to claim 1, characterized in that: The front column (3) is a tubular structure with an open lower end. The telescopic rod (7) is sleeved in the inner cavity of the front column (3). A radially installed positioning pin (8) is provided on the telescopic rod (7). The side wall of the front column (3) is provided with a plurality of positioning holes (9) adapted to the positioning pin (8). The plurality of positioning holes (9) are evenly spaced along the length direction of the front column (3).

3. A portable coring machine loading and unloading device according to claim 1 or 2, characterized in that: The length of the front column (3) is shorter than that of the rear column (4); the longitudinal beam (6) comprises an upper longitudinal beam fixedly connected to the upper ends of the front column (3) and the rear column (4) and a lower longitudinal beam (61) fixedly connected to the lower ends of the front column (3) and the rear column (4); the front end of the lower longitudinal beam (61) is provided with an upwardly inclined bending section (62).

4. A portable coring machine loading and unloading device according to claim 1 or 2, characterized in that: The lower end of the telescopic rod (7) is connected to the front walking wheel (71) through a screw rod (72), and a fastening nut (73) is installed on the screw rod (72) through a thread; the lower end surface of the telescopic rod (7) is provided with an internal threaded hole adapted to the screw rod (72), and the upper end of the screw rod (72) is installed in the internal threaded hole.

5. A portable coring machine loading and unloading device according to claim 1 or 2, characterized in that: The front running wheel (71) and the rear running wheel (41) are both fixed casters with locking mechanisms.

Images