Portable compaction density instrument

Abstract

The utility model belongs to the technical field of lithium iron phosphate preparation, particularly relates to a portable compaction density instrument, and aims at solving the problems that an existing density instrument cannot directly carry out compaction detection on materials in a furnace discharge sagger and the difference of the tested compaction density is large, and provides the following scheme that the portable compaction density instrument comprises an adding assembly and a material pressing assembly, according to the utility model, the density instrument can be conveniently carried through the handheld cross rod, the material loading assembly of the density instrument can be conveniently placed in a discharge sagger for loading lithium iron phosphate sintering materials, and the loaded lithium iron phosphate sintering materials can be compacted through the material pressing assembly; a compaction result is displayed through the compaction detection assembly, so that the density meter can directly carry out a complete process of compaction density detection in the furnace discharge saggar, the whole detection period is relatively short, and adjustment of a subsequent process formula is facilitated; due to the fact that the materials can be conveniently added, multi-point material adding detection can be carried out in the furnace discharging saggar, and a more accurate detection result is obtained.

Description

Technical Field

[0001] The utility model relates to a density meter, in particular to a portable compaction density meter, belonging to the technical field of lithium iron phosphate preparation. Background Art

[0002] As a new generation of high-performance batteries, lithium-ion batteries feature high energy density, excellent cycle performance, and high safety. They are currently widely used in electronics, energy storage, and new energy vehicles. Common lithium-ion battery cathode materials include lithium cobalt oxide, lithium iron phosphate, and ternary materials. Due to its unique olivine structure, lithium iron phosphate has structural stability, long-term cycle performance, and excellent safety. It is currently widely used in the power battery field. During the lithium-ion battery manufacturing process, compaction density has a significant impact on battery performance. The higher the compaction density, the higher the battery capacity can be. Therefore, compaction density is considered a reference indicator of a material's energy density.

[0003] In the prior art, a lithium-ion battery positive electrode material compaction density test jig disclosed in announcement number CN204855331U includes a pressure rod, a mold sleeve, and a base. The pressure rod is installed in the through hole of the mold sleeve, and the base has a blanking hole. The blanking hole is equipped with a bottom rod, and the bottom rod is located below the through hole. The utility model has a simple structure and stable test results, avoids the influence of human factors, and improves the scientific nature of the lithium-ion battery compaction density test. However, in the actual test process, the existing jig cannot directly perform material compaction detection in the furnace sagger, that is, it is impossible to quickly obtain the true level of material compaction density after the lithium iron phosphate sintered material is discharged from the furnace, and thus it is impossible to provide a good basis for adjusting the subsequent process formula, which is unfriendly to the subsequent process formula adjustment. In addition, when measuring the sintering compaction, the test can only be carried out in batches, which leads to large differences in the compaction density of the test, which is also not conducive to actual test use. Summary of the Invention

[0004] The utility model provides a portable compaction density meter to solve the problems that the existing density meter cannot directly perform compaction detection of materials in the furnace sagger and the compaction density tested has a large difference.

[0005] The utility model achieves the above-mentioned purpose through the following technical solutions: a portable compaction density meter, comprising a material loading assembly and a material pressing assembly, the material pressing assembly being assembled and connected above the material loading assembly, the material pressing assembly being further connected to a handheld crossbar, and a compaction detection assembly being provided on the rod body of the handheld crossbar;

[0006] The material loading assembly includes a material loading box and a mounting movable plate. The two sides of the material loading box are open, the mounting movable plate is L-shaped, and the upper end of the mounting movable plate is rotatably connected to the openings on both sides of the material loading box. An outer wall of one side of the material loading box is connected to an mounting drive box, and the power output end of the mounting drive box is connected to the mounting movable plate.

[0007] The material pressing assembly includes a vertical connecting rod, a material pressing plate and a square pressing rod. The square pressing rod is movably inserted in the vertical connecting rod. The material pressing plate is connected to the bottom end of the square pressing rod, and the material pressing plate is placed in the material loading box. The rod body of the square pressing rod passes through the upper plate surface of the material loading box.

[0008] As a further solution of the present invention: the bottom ends of the box plates at both ends of the material loading box are integrally connected with the box plate inclined bottom plate, and the bottom ends of the two additional movable plates are provided with movable plate inclined plate end plates on opposite sides.

[0009] As a further solution of the utility model: a weighing base plate is movably embedded in the bottom plate body of each movable plate, and a weighing sensor is fixedly connected to the center of the lower plate surface of the weighing base plate, and the weighing sensor is connected to the compaction detection component for signal transmission.

[0010] As a further solution of the present invention: a rotating shaft is provided through the upper end of the additional movable plate, and the shaft body of the rotating shaft is fixedly connected to the additional movable plate, the two ends of the rotating shaft are respectively rotatably connected to the material loading box, and one end of the rotating shaft is connected to the power output end of the additional drive box.

[0011] As a further solution of the present invention: the additional drive box includes an additional drive housing, a drive worm gear, a rotating connecting rod and a drive worm. The drive worm gear, the rotating connecting rod and the drive worm are all arranged in the additional drive housing. The drive worm gear is fixedly connected to one end of the rotating shaft coaxially. The two ends of the rotating connecting rod are connected to the drive worms. The two drive worms are respectively meshed with the drive worm gear, and the helical teeth of the two drive worms are arranged in opposite directions.

[0012] As a further solution of the present invention: the outer wall of the additional drive housing is fixedly connected to the additional motor, the rotating shaft of the additional motor is inserted in the additional drive housing, and the rotating shaft of the additional motor is coaxially fixedly connected to the driving bevel gear, and the rod body of the rotating connecting rod is fixedly sleeved with a driven bevel gear, and the driving bevel gear is meshed with the driven bevel gear.

[0013] As a further solution of the present invention: a movable inner cavity is opened in the rod of the vertical connecting rod, and a laser rangefinder is embedded in the upper end surface of the movable inner cavity, and the laser rangefinder is connected to the compaction detection component for signal transmission.

[0014] As a further solution of the present invention: a downward pressure motor is fixedly connected inside the vertical connecting rod, and a threaded rotating rod is rotatably connected inside the movable inner cavity. One end of the threaded rotating rod is fixedly connected coaxially with the rotating shaft of the downward pressure motor, and the other end of the threaded rotating rod is threadedly connected to the square downward pressure rod. A pressure sensor is embedded in the center of the lower plate surface of the material downward pressure plate, and the pressure sensor is connected to the compaction detection component for signal transmission.

[0015] As a further solution of the present invention: a handle is fixedly connected to the rod body of the handheld cross bar, and an elbow support plate is integrally connected to the tail end of the handheld cross bar.

[0016] As a further solution of the present invention: the compaction detection component arranged on the handle of the handheld cross bar includes a switch button, a liquid crystal display, a control main board and a battery. The switch button is fixedly connected to the handle, the liquid crystal display is embedded in the outer wall of the handle of the handheld cross bar, the control main board and the battery are both embedded in the inside of the handle of the handheld cross bar, and the switch button and the liquid crystal display are both connected to the control main board for signal transmission, and the battery is electrically connected to the electrical components of the density meter.

[0017] The beneficial effects of the utility model are:

[0018] 1. The utility model is provided with a material adding component and a material pressing component, the material pressing component is further connected to a handheld crossbar, and a compaction detection component is provided on the rod of the handheld crossbar, so that the density meter can be conveniently carried by the handheld crossbar, and the material adding component of the density meter can be conveniently placed in the furnace sagger to add lithium iron phosphate sintered material, and the added lithium iron phosphate sintered material can be compacted by the material pressing component, and the compaction result is displayed by the compaction detection component, so that the density meter can directly perform a complete process of compaction density detection in the furnace sagger, so that the entire detection cycle is relatively short, which is convenient for adjusting the subsequent process formula;

[0019] 2. The material loading assembly provided in the present invention includes a material loading box and a mounting movable plate. An outer wall of one side of the material loading box is connected to a mounting drive box, which can drive the two mounting movable plates to open outwards through the mounting drive box, so that the bottom end of the material loading box is also in an open state. At this time, the bottom end of the material loading box can be placed on the lithium iron phosphate sintered material. When the two mounting movable plates are driven inward by the mounting drive box, part of the lithium iron phosphate sintered material can be cut and placed in the material loading box, and when the two mounting movable plates are retracted inwards and pressed together, a closed box structure can be formed with the material loading box, that is, the loading of materials can be realized. Since the material is convenient to load, the material loading detection at multiple points can be carried out in the kiln sagger to obtain more accurate detection results.

[0020] 3. The material pressing assembly provided in the present invention includes a vertical connecting rod, a material pressing plate and a square pressing rod. The material pressing plate can be driven by the downward movement of the square pressing rod to compact the lithium iron phosphate sintered material loaded in the material loading box. The compaction density can be calculated based on the total volume after pressing and the weight of the weighed lithium iron phosphate sintered material, and then the obtained compaction density can be displayed through the compaction detection assembly. There is no need to grind the material or perform other processing, and there is no risk of damage to the mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the structure of the material adding assembly of the utility model in the closed state;

[0022] Figure 2 This is a schematic diagram of the structure of the material adding assembly of the utility model in the open state;

[0023] Figure 3 This is a schematic diagram of the structure of the utility model with a movable plate installed;

[0024] Figure 4 This is a schematic diagram of the cross-sectional structure of the utility model with a movable plate installed;

[0025] Figure 5 This is a schematic diagram of the cross-sectional structure of the utility model with a drive box installed;

[0026] Figure 6 This is a schematic diagram of the connection structure of the vertical connecting rod, the handheld cross bar and the material lower pressure plate of the utility model;

[0027] Figure 7 This is a schematic diagram of the cross-sectional structure of the utility model in a fully opened state with the movable panel installed;

[0028] Figure 8 This is a schematic diagram of the cross-sectional structure of the vertical connecting rod of the utility model;

[0029] Figure 9 This is a schematic diagram of the cross-sectional structure of the handheld crossbar of the present utility model.

[0030] In the figure: 1. Material loading box, 11. Box plate inclined bottom plate, 2. Install movable plate, 21. Weighing bottom plate, 22. Rotating shaft, 23. Weighing sensor, 24. Movable plate inclined plate end plate, 3. Install drive box, 31. Install drive housing, 32. Drive worm gear, 33. Rotating connecting rod, 34. Drive worm, 35. Driven bevel gear, 4. Install motor, 41. Active bevel gear, 5. Vertical connecting rod, 51. Movable inner cavity, 52. Laser rangefinder, 6. Handheld crossbar, 61. Grip, 62. Elbow support plate, 63. Switch button, 64. LCD screen, 65. Control main board, 66. Battery, 7. Material lower pressure plate, 71. Square lower pressure rod, 72. Threaded rotating rod, 73. Lower pressure motor, 74. Pressure sensor. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] Example 1

[0033] like Figure 1 、 Figure 2 、 Figure 6 and Figure 7 As shown, a portable compaction density meter includes a material loading component and a material pressing component, the material pressing component is combined and connected above the material loading component, the material pressing component is also connected to a handheld crossbar 6, and a compaction detection component is provided on the rod body of the handheld crossbar 6, so that the density meter can be conveniently carried by the handheld crossbar 6, and the material loading component of the density meter can be conveniently placed in the furnace sagger to load lithium iron phosphate sintered material, and the loaded lithium iron phosphate sintered material can be compacted by the material pressing component, and the compaction result is displayed by the compaction detection component, so that the density meter can directly perform a complete process of compaction density detection in the furnace sagger, so that the entire detection cycle is relatively short, which is convenient for adjusting the subsequent process formula;

[0034] The material adding assembly includes a material adding box body 1 and an additional movable plate 2. The two sides of the material adding box body 1 are open, the additional movable plate 2 is L-shaped, and the upper end of the additional movable plate 2 is rotatably connected to the openings on both sides of the material adding box body 1. The outer wall of one side of the material adding box body 1 is connected to the additional drive box 3. The power output end of the additional drive box 3 is connected to the additional movable plate 2. The additional drive box 3 can be used to drive the two additional movable plates 2 to open outward, so that the bottom end of the material adding box body 1 is also in an open state. At this time, the material adding The bottom end of the loading box 1 can be placed on the lithium iron phosphate sintered material. When the two additional movable plates 2 are driven to retract inward by the additional driving box 3, part of the lithium iron phosphate sintered material can be cut and placed in the material loading box 1. When the two additional movable plates 2 are retracted inward and pressed together, a closed box structure can be formed with the material loading box 1, that is, the loading of materials can be realized. Since the loading of materials is convenient, the material loading detection at multiple points can be carried out in the kiln sagger to obtain more accurate detection results.

[0035] The material pressing assembly includes a vertical connecting rod 5, a material pressing plate 7 and a square pressing rod 71. The square pressing rod 71 is movably inserted in the vertical connecting rod 5. The material pressing plate 7 is connected to the bottom end of the square pressing rod 71, and the material pressing plate 7 is placed in the material loading box 1. The rod body of the square pressing rod 71 passes through the upper plate surface of the material loading box 1. The material pressing plate 7 can be driven by the downward movement of the square pressing rod 71 to compact the lithium iron phosphate sintered material loaded in the material loading box 1. The compaction density can be calculated based on the total volume after pressing and the weight of the weighed lithium iron phosphate sintered material, and then the obtained compaction density can be displayed through the compaction detection assembly. There is no need to grind the material or perform other processing, and there is no risk of damage to the mold.

[0036] Example 2

[0037] Improvements based on Example 1:

[0038] like Figure 1 、 Figure 2 、 Figure 3 and Figure 4 As shown, the bottom ends of the box plates at both ends of the material loading box body 1 are integrally connected with the box plate inclined bottom plate 11, and the opposite sides of the bottom ends of the two additional movable plates 2 are provided with movable plate inclined plate end plates 24. When the bottom end of the material loading box body 1 is placed on the lithium iron phosphate sintered material, the box plates at both ends can be pressed downward by the box plate inclined bottom plate 11, that is, the bottom ends of the box plates at both ends of the material loading box body 1 can be buried in the lithium iron phosphate sintered material to form a cutting of the material, and when the two additional movable plates 2 are retracted inward, the movable plate inclined plate end plates 24 can also be more easily inserted into the lithium iron phosphate sintered material, so as to facilitate the loading of the material.

[0039] Furthermore, a weighing base plate 21 is movably embedded in the bottom plate body of each additional movable plate 2, and a weighing sensor 23 is fixedly connected to the center of the lower plate surface of the weighing base plate 21. The weighing sensor 23 is connected to the compaction detection component for signal transmission. After the two additional movable plates 2 have completed the installation of lithium iron phosphate sintered materials, the materials can be stacked on the weighing base plate 21, and then the installed materials can be weighed by the weighing sensor 23 to obtain the real-time weight of each installed material.

[0040] Furthermore, a rotating shaft 22 is provided through the upper end of the additional movable plate 2, and the shaft body of the rotating shaft 22 is fixedly connected to the additional movable plate 2, and the two ends of the rotating shaft 22 are respectively rotatably connected to the material loading box 1, and one end of the rotating shaft 22 is connected to the power output end of the additional drive box 3. The rotating shaft 22 can be driven to rotate by the additional drive box 3, and then the additional movable plate 2 can be driven to flip over, so as to realize the action of the two additional movable plates 2 to open outward or retract inward, so that the density meter can automatically load materials and automatically put the materials back into the furnace bowl after the detection is completed.

[0041] like Figure 1 、 Figure 2 and Figure 5 As shown, the additional drive box 3 includes an additional drive housing 31, a drive worm gear 32, a rotating connecting rod 33 and a drive worm 34. The drive worm gear 32, the rotating connecting rod 33 and the drive worm 34 are all arranged in the additional drive housing 31. The drive worm gear 32 is coaxially fixedly connected to one end of the rotating shaft 22. The two ends of the rotating connecting rod 33 are connected to the drive worm 34. The two drive worms 34 are respectively meshed with the drive worm gear 32, and the helical teeth of the two drive worms 34 are arranged in opposite directions, so that when the rotating connecting rod 33 drives the drive worm 34 to rotate, the meshing action of the worm gears drives the two drive worm gears 32 to rotate in opposite directions, and then the rotating shaft 22 can be driven to drive the two additional movable plates 2 to flip in the opposite direction.

[0042] Furthermore, the outer wall of the additional drive housing 31 is fixedly connected to the additional motor 4, the rotating shaft of the additional motor 4 is inserted in the additional drive housing 31, and the rotating shaft of the additional motor 4 is coaxially fixedly connected to the active bevel gear 41, and the rod body of the rotating connecting rod 33 is fixedly sleeved with a driven bevel gear 35, and the active bevel gear 41 is meshed with the driven bevel gear 35 so that the driving force can be provided by the additional motor 4, thereby driving the rotating connecting rod 33 to rotate forward and reverse.

[0043] Such as Figure 1 、 Figure 2 、 Figure 6 、 Figure 7 、 Figure 8 and Figure 9 As shown, a movable inner cavity 51 is opened in the rod of the vertical connecting rod 5, and a laser rangefinder 52 is embedded in the upper end surface of the movable inner cavity 51. The laser rangefinder 52 is connected to the compaction detection component for signal transmission. The opened movable inner cavity 51 enables the square pressing rod 71 to have an adjustment space for moving up and down, and the set laser rangefinder 52 can measure the moving distance of the square pressing rod 71, that is, it can identify the pressing height of the material pressing plate 7 to obtain the volume of the material after each compaction.

[0044] Furthermore, a downward-pressing motor 73 is fixedly connected to the rod of the vertical connecting rod 5, and a threaded rotating rod 72 is rotatably connected to the movable inner cavity 51. One end of the threaded rotating rod 72 is fixedly connected coaxially with the rotating shaft of the downward-pressing motor 73, and the other end of the threaded rotating rod 72 is threadedly connected to the square downward-pressing rod 71. A pressure sensor 74 is embedded in the center of the lower plate surface of the material downward-pressing plate 7, and the pressure sensor 74 is connected to the compaction detection component for signal transmission. The threaded rotating rod 72 can be driven to rotate by the downward-pressing motor 73, and then the square downward-pressing rod 71 can be driven up and down to realize that the material downward-pressing plate 7 presses the material, and the pressure sensor 74 set can monitor the downward pressure of the material downward-pressing plate 7 on the material in real time to ensure that the downward pressure can be stopped when the set pressure is reached, and to ensure that the material can be pressed down with equal pressure each time it is measured.

[0045] Furthermore, a handle 61 is fixedly connected to the rod body of the hand-held cross bar 6, and an elbow support plate 62 is integrally connected to the tail end of the hand-held cross bar 6. When picking up the density meter, the hand can hold the handle 61 and support the elbow on the elbow support plate 62 to form a lever-like picking method, which means that the density meter can be picked up more labor-savingly.

[0046] Furthermore, the compaction detection component provided on the rod body of the handheld cross bar 6 includes a switch button 63, a liquid crystal display 64, a control main board 65 and a battery 66. The switch button 63 is fixedly connected to the handle 61, and the liquid crystal display 64 is embedded in the outer wall of the rod body of the handheld cross bar 6. The control main board 65 and the battery 66 are both embedded in the rod body of the handheld cross bar 6, and the switch button 63 and the liquid crystal display 64 are both connected to the control main board 65 for signal transmission, and the battery 66 is electrically connected to the various electrical components of the density meter. By arranging the switch button 63 on the handle 61, the switch button 63 can be operated when the density meter is held with one hand, and the measured material weight data and the volume data after compaction can be transmitted to the control main board for compaction calculation, and the calculated compaction density can be displayed in real time through the liquid crystal display 64.

[0047] Working principle: The density meter can be easily carried by holding the cross bar 6, and the material loading component of the density meter can be conveniently placed in the furnace sagger to load the lithium iron phosphate sintered material. The two additional movable plates 2 are driven to open outward by the additional driving box 3, so that the bottom end of the material loading box 1 is also in an open state. At this time, the bottom end of the material loading box 1 can be placed on the lithium iron phosphate sintered material. When the two additional movable plates 2 are driven to retract inward by the additional driving box 3, part of the lithium iron phosphate sintered material can be cut and placed in the material loading box 1, and when the two additional movable plates 2 are retracted inward and close together, they can be connected with the material loading box The body 1 forms a closed box structure, which can realize the loading of materials and can compact the loaded lithium iron phosphate sintered material through the material pressing component. The downward movement of the square pressing rod 71 drives the material pressing plate 7 to compact the lithium iron phosphate sintered material loaded in the material loading box 1. The compaction density can be calculated according to the total volume after pressing and the weight of the weighed lithium iron phosphate sintered material, and then the obtained compaction density can be displayed through the compaction detection component. There is no need to grind the material or perform other treatments, and there is no risk of damage to the mold, which makes the entire detection cycle shorter and facilitates the adjustment of subsequent process formulas.

[0048] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0049] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A portable compaction density meter, comprising a material loading assembly and a material pressing assembly, characterized in that: The material pressing assembly is connected above the material adding assembly, and the material pressing assembly is also connected to a handheld crossbar (6), and a compaction detection assembly is provided on the rod of the handheld crossbar (6); The material loading assembly comprises a material loading box (1) and a loading movable plate (2), both sides of the material loading box (1) are open, the loading movable plate (2) is L-shaped, and the upper end of the loading movable plate (2) is rotatably connected to the openings on both sides of the material loading box (1), and an outer wall of one side of the material loading box (1) is connected to an loading drive box (3), and the power output end of the loading drive box (3) is connected to the loading movable plate (2); The material pressing assembly comprises a vertical connecting rod (5), a material pressing plate (7) and a square pressing rod (71), wherein the square pressing rod (71) is movably inserted in the vertical connecting rod (5), the material pressing plate (7) is connected to the bottom end of the square pressing rod (71), and the material pressing plate (7) is placed in the material loading box (1), and the rod body of the square pressing rod (71) passes through the upper plate surface of the material loading box (1).

2. The portable compaction density meter according to claim 1, characterized in that: The bottom ends of the box plates at both ends of the material loading box (1) are integrally connected with the box plate inclined bottom plate (11), and the opposite sides of the bottom ends of the two additional movable plates (2) are provided with movable plate inclined plate end plates (24).

3. The portable compaction density meter according to claim 2, characterized in that: A weighing base plate (21) is movably embedded in the bottom plate body of each of the additional movable plates (2), and a weighing sensor (23) is fixedly connected to the center of the lower plate surface of the weighing base plate (21), and the weighing sensor (23) is connected to the compaction detection component for signal transmission.

4. The portable compaction density meter according to claim 1, characterized in that: A rotating shaft (22) is provided through the upper end of the additional movable plate (2), and the shaft body of the rotating shaft (22) is fixedly connected to the additional movable plate (2), the two ends of the rotating shaft (22) are respectively rotatably connected to the material loading box (1), and one end of the rotating shaft (22) is connected to the power output end of the additional drive box (3).

5. The portable compaction density meter according to claim 4, characterized in that: The additional drive box (3) comprises an additional drive housing (31), a drive worm gear (32), a rotating connecting rod (33) and a drive worm (34); the drive worm gear (32), the rotating connecting rod (33) and the drive worm (34) are all arranged in the additional drive housing (31); the drive worm gear (32) is fixedly connected to one end of the rotating shaft (22) coaxially; the two ends of the rotating connecting rod (33) are connected to the drive worm (34); the two drive worms (34) are respectively meshed with the drive worm gear (32), and the helical teeth of the two drive worms (34) are arranged in opposite directions.

6. The portable compaction density meter according to claim 5, characterized in that: The outer wall of the additional drive housing (31) is fixedly connected to the additional motor (4), the rotating shaft of the additional motor (4) is inserted into the additional drive housing (31), and the rotating shaft of the additional motor (4) is coaxially fixedly connected to the driving bevel gear (41), and the rod body of the rotating connecting rod (33) is fixedly sleeved with a driven bevel gear (35), and the driving bevel gear (41) is meshedly connected to the driven bevel gear (35).

7. The portable compaction density meter according to claim 1, characterized in that: A movable inner cavity (51) is provided in the vertical connecting rod (5), and a laser rangefinder (52) is embedded in the upper end surface of the movable inner cavity (51), and the laser rangefinder (52) is connected to the compaction detection component for signal transmission.

8. The portable compaction density meter according to claim 7, characterized in that: A downward pressing motor (73) is fixedly connected to the rod of the vertical connecting rod (5), and a threaded rotating rod (72) is rotatably connected to the movable inner cavity (51). One end of the threaded rotating rod (72) is fixedly connected to the rotating shaft of the downward pressing motor (73) coaxially, and the other end of the threaded rotating rod (72) is threadedly connected to the square downward pressing rod (71). A pressure sensor (74) is embedded in the center of the lower plate surface of the material downward pressing plate (7), and the pressure sensor (74) is connected to the compaction detection component for signal transmission.

9. The portable compaction density meter according to claim 1, characterized in that: A handle (61) is fixedly connected to the shaft of the handheld crossbar (6), and an elbow support plate (62) is integrally connected to the tail end of the handheld crossbar (6).

10. The portable compaction density meter according to claim 9, characterized in that: The compaction detection assembly provided on the shaft of the handheld crossbar (6) includes a switch button (63), a liquid crystal display (64), a control mainboard (65) and a battery (66), wherein the switch button (63) is fixedly connected to the handle (61), the liquid crystal display (64) is embedded in the outer wall of the shaft of the handheld crossbar (6), the control mainboard (65) and the battery (66) are both embedded in the shaft of the handheld crossbar (6), and the switch button (63) and the liquid crystal display (64) are both connected to the control mainboard (65) for signal transmission, and the battery (66) is electrically connected to various electrical components of the density meter.

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