Overload alarm protection device for working bucket

Abstract

The invention relates to the technical field of overload protection, in particular to an overload alarm protection device for a working bucket, which comprises a junction box and four pressure sensors arranged around the junction box, and is characterized in that the output ends of the pressure sensors are connected with electric wires which extend into the junction box and are electrically connected with the junction box; the box cover is detachably mounted on the top of the junction box, so that the screws can be opposite to the mounting hole positions in different positions on the base, and the detachable mounting of the junction box is completed; therefore, mounting screws with different outer diameter specifications can effectively penetrate through the gap between the two mounting strips to be in threaded butt joint with the mounting holes in the base, wires with overlong exposed lengths can be wound through rotation of the wire spool, the problem that the connected wires are loosened, fall off and damaged due to friction is avoided, and the service life of the wires is prolonged. The four wire spools can be extruded and fixed simultaneously through extrusion and abutting of the extrusion round blocks, and the wire spool fixing device has the advantage of being convenient to use.

Description

Technical Field

[0001] The invention relates to the technical field of overload protection, and in particular to an overload alarm protection device for a working bucket. Background Art

[0002] The installation of an overload alarm protection device for the working bucket comprehensively utilizes sensor measurement and control technology, and uses a single-chip microcomputer to comprehensively analyze the load of the load object and make corresponding processing, thereby realizing real-time monitoring and automatic control of the load. The sensor load and status are collected and displayed through a computer or PLC, and the entire process of sensor loading is monitored, thereby effectively ensuring the safety of the material platform.

[0003] The main structure of the working bucket load over-limit alarm protection device includes a pressure sensor and a junction box. The pressure sensor is installed between the weighing platform and the base. The pressure information is obtained through the gravity change on the weighing platform and transmitted to the junction box. The electrical signal is transmitted to the instrument through the junction box and displayed intuitively through the instrument.

[0004] However, traditional junction boxes generally adopt a detachable installation method, such as bolts installed on the base. In order to ensure a smooth installation process, the mounting holes reserved on the junction box need to be opposite to the mounting holes reserved on the base, and the bolt specifications used must match the apertures of the mounting holes reserved on the base. Therefore, there are installation limitations. In addition, the positions of the weighing platforms are different, and the positions of the junction boxes and each weighing platform are also different. This makes the distance between the pressure sensor installed on the weighing platform and the junction box different. This will cause the exposed length of the connecting wires between the pressure sensor and the junction box to be too long, and the loose wires will fall off and easily be damaged by friction. Summary of the invention

[0005] In view of the above-mentioned shortcomings of the prior art, the present invention provides an overload alarm protection device for a working bucket, which can effectively solve the problem of the inconvenience of using the prior art.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0007] The present invention provides an overload alarm protection device for a working bucket, comprising a junction box and four pressure sensors arranged around the junction box, wherein the output ends of the pressure sensors are connected to electric wires extending into the junction box and electrically connected to the junction box, a box cover is detachably installed on the top of the junction box, four mounting components include rotating seats rotatably installed at four corners of the top of the junction box, mounting seats are installed on one side of the rotating seats, mounting holes are penetrated on the mounting seats, two parallel mounting bars are telescopically and slidably installed in the mounting holes, mounting screws passing through the two mounting bars are also arranged in the mounting holes, a winding component includes a winding reel rotatably installed at the four corners of the inner cavity of the junction box, electric wires are respectively wound on the winding reel, a knob is arranged at the bottom of the junction box, a rotating rod is installed between the knob and the bottom of the corresponding winding reel, a limiting fixing component includes a rotating screw rotatably installed through the box cover and extending into the junction box, a lifting plate is threadedly sleeved on the rotating screw, and extrusion round blocks respectively extruding and contacting with the corresponding winding reel are installed at the four corners of the bottom of the lifting plate.

[0008] Furthermore, the output end of the junction box is connected to a signal line, the other end of the signal line is electrically connected to a meter, a number of metal heat dissipation strips are installed on two opposite outer side walls of the junction box, and a slot is provided at the top of the junction box through the inner cavity to facilitate the clamping of the box cover.

[0009] Furthermore, a first threaded hole and two second threaded holes are formed through the pressure sensor, and a spring protective cover which is sleeved on the electric wire is installed at one end of the pressure sensor.

[0010] Furthermore, the two opposite outer walls of the mounting seat are threadedly installed with adjustment screws, and the adjustment screws are extended to one end of the mounting hole and are rotated between the corresponding mounting strip. The two opposite outer walls of the mounting strip are vertically fixed with two T-shaped limit shafts, and the two opposite outer walls of the mounting seat are penetrated by the mounting hole to form a slot for facilitating the telescopic sliding of the T-shaped limit shaft.

[0011] Furthermore, a limiting groove is provided on one side of the mounting strip close to the corresponding adjusting screw, and a limiting block is vertically fixedly installed on one end of the adjusting screw extending into the mounting hole, and the limiting blocks are rotatably installed in the corresponding limiting grooves.

[0012] Furthermore, the outer diameter of the mounting screw head is smaller than the distance between the two mounting strips, and the outer diameter of the mounting screw cap is larger than the distance between the two mounting strips.

[0013] Furthermore, fixing screws are detachably installed between the four corners of the box cover and the junction box, shaft cylinders are fixedly installed at the four corners of the lower bottom of the box cover, and shaft rods fixedly installed on the top of the lifting plate are telescopically and slidably installed at the bottom of the shaft cylinders.

[0014] Furthermore, the thread at the bottom end of the rotating screw extends through and extends to the bottom of the lifting plate, and a limiting circular block is vertically fixedly installed, and the outer diameter of the limiting circular block is larger than the outer diameter of the rotating screw head.

[0015] Compared with the known prior art, the technical solution provided by the present invention has the following beneficial effects:

[0016] 1. The mounting seats are rotatably installed at the four corners above the junction box. Two mounting bars that can be telescopically slid and adjusted in spacing are arranged in the mounting holes of the mounting seats. A mounting screw that can be detachably mounted with the base is arranged between the two mounting bars. Since the mounting seat, the mounting bar and the mounting screw can be rotated as a whole, and the mounting screw can be moved between the two mounting bars to adjust the mounting position, the screw can be positioned relative to the mounting holes at different positions on the base to complete the detachable installation of the junction box. Moreover, since the spacing between the two mounting bars can be adjusted, the mounting screws with different outer diameters can effectively penetrate the gap between the two mounting bars and connect with the mounting holes on the base through threads, which has the characteristics of strong installation adaptability.

[0017] 2. Four winding drums are arranged in the junction box. The wires connected to the output end of the pressure sensor are wound around the corresponding winding drums and electrically connected to the junction box. The wires that are exposed too long can be rolled up by rotating the winding drums to avoid the problem of the connected wires becoming loose, falling off, and being damaged by friction. At the same time, a lifting plate that can be raised and lowered and slid is arranged in the junction box. Extrusion round blocks that respectively squeeze and contact with the corresponding winding drums are installed at the four corners of the bottom end of the lifting plate. The four winding drums can be squeezed and fixed at the same time by the squeezing and contact of the squeezing round blocks, which is easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 It is a schematic diagram of the overall first-view structure of the present invention;

[0020] Figure 2 It is a schematic diagram of the structure of the pressure sensor of the present invention;

[0021] Figure 3 For the present invention Figure 1 The enlarged structural diagram at A in the middle;

[0022] Figure 4 It is a schematic diagram of the installation structure of the installation bar of the present invention;

[0023] Figure 5 It is a schematic diagram of the overall second viewing angle structure of the present invention;

[0024] Figure 6 It is a schematic diagram of the installation structure of the winding assembly and the limiting fixing assembly of the present invention;

[0025] Figure 7 It is a schematic diagram of the structure of the limiting and fixing component of the present invention.

[0026] The numbers in the figure represent:

[0027] 1. Junction box; 11. Signal line; 12. Metal heat sink; 13. Wire winding reel; 14. Rotating rod; 15. Knob;

[0028] 2. Pressure sensor; 21. First threaded hole; 22. Second threaded hole; 23. Electric wire; 24. Spring protective cover;

[0029] 31. Rotating seat; 32. Mounting seat; 33. Mounting hole; 34. Adjusting screw; 35. Mounting strip; 36. T-type limit shaft; 37. Mounting screw;

[0030] 4. Box cover; 41. Lifting plate; 42. Rotating screw; 43. Extruding round block; 44. Shaft cylinder; 45. Shaft rod; 46. Limiting round block. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are 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 creative work are within the scope of protection of the present invention.

[0032] The present invention will be further described below in conjunction with the embodiments.

[0033] Example 1

[0034] Reference Figure 1-7, which is the first embodiment of the present invention, an overload alarm protection device for a working bucket, comprising a junction box 1 and four pressure sensors 2 arranged around the junction box, the pressure sensor 2 is a FB-100KG cantilever beam sensor, which has a simple structure, strong reliability, one end is fixed and the other end is stressed, a wide range of mass production, high precision, convenient installation and maintenance, and provides overload limit, anti-rollover, anti-lateral force, impact resistance, adaptation to thermal expansion and contraction of the scale body, lightning protection grounding bypass and other protections, ensuring the metering performance of the sensor, the sensor force mode adopts pressure, the range is 100KG, the output sensitivity is 2.0mv / v, the outlet mode adopts the national standard waterproof connector, the standard line length is 3 meters, the output ends of the pressure sensor 2 are connected to the wires 23 extending into the junction box 1 and electrically connected to the junction box 1, and the top of the junction box 1 is detachably installed with a box cover 4;

[0035] The four mounting components include rotating seats 31 rotatably mounted at the four corners of the top of the junction box 1, and mounting seats 32 are mounted on one side of the rotating seat 31. The mounting seats 32 are penetrated with mounting holes 33. Two parallel mounting strips 35 are telescopically and slidably mounted in the mounting holes 33. The mounting holes 33 are also provided with mounting screws 37 that pass through the two mounting strips 35. The winding components include winding reels 13 rotatably mounted at the four corners of the inner cavity of the junction box 1, and the winding reels 13 are respectively wound with wires 23. The lower part of the junction box 1 is provided with knobs 15, and the knobs 15 and A rotating rod 14 is installed between the corresponding winding drums 13, and the limiting fixing assembly includes a rotating screw 42 that is rotatably installed and passes through the box cover 4 and extends into the junction box 1. A lifting plate 41 is threadedly sleeved on the rotating screw 42. The specifications of the lifting plate 41 are slightly smaller than those of the box cover 4, so that the lifting plate 41 can be taken out of the junction box 1 along with the box cover 4 for maintenance and replacement. Extrusion round blocks 43 that respectively squeeze and contact the corresponding winding drums 13 are installed at the four corners of the lower bottom of the lifting plate 41. The extrusion round blocks 43 are opposite to the corresponding winding drums 13 and have matching specifications.

[0036] Example 2

[0037] Reference Figure 1-2, which is the second embodiment of the present invention. This embodiment is different from the first embodiment in that: the output end of the junction box 1 is connected to a signal line 11, and the other end of the signal line 11 is electrically connected to an instrument. The instrument adopts a 24-bit A / D converter and cooperates with various sensors and transmitters to achieve measurement, display, alarm monitoring, data acquisition and recording of physical parameters such as pressure, flow, level, component analysis, force and mechanical quantity. A plurality of metal heat dissipation strips 12 are installed on the two opposite outer walls of the junction box 1. A notch is provided at the top of the junction box 1 through the inner cavity to facilitate the clamping of the box cover 4. A first threaded hole 21 and two second threaded holes 22 are provided through the pressure sensor 2. A spring protective cover 24 is installed on one end of the pressure sensor 2 and is sleeved on the wire 23 to protect the bending part of the wire 23 to prevent foreign objects from scratching or cutting the wire 23 and to prevent deformation and damage at the connection between the wire 23 and the pressure sensor 2.

[0038] The remaining structures are the same as those of Example 1.

[0039] Example 3

[0040] Reference Figure 3-4 , which is the third embodiment of the present invention. This embodiment is different from the second embodiment in that: the two opposite outer walls of the mounting seat 32 are threadedly installed with adjustment screws 34, the adjustment screws 34 extend into one end of the mounting hole 33 and are limitedly rotated and installed between the corresponding mounting strips 35, and the two opposite outer walls of the mounting strips 35 are vertically fixed with two T-shaped limit shafts 36, and the two opposite outer walls of the mounting seat 32 are penetrated through the mounting hole 33 to open a card groove that facilitates the telescopic sliding of the T-shaped limit shaft 36 to avoid the two mounting strips 35 from being squeezed, conflicted and damaged by each other, and the mounting strips 35 are provided with a limit groove on one side close to the corresponding adjustment screw 34, and the adjustment screw 36 is fixed on the two opposite outer walls of the mounting strips 35. 4 extends into one end of the mounting hole 33 and is vertically fixed with a limit block, which is rotatably installed in the corresponding limit groove, so that the spiral motion of the adjusting screw 34 is transmitted to the mounting strip 35, so that the mounting strip 35 can only telescopically slide, and the outer diameter of the nail head of the mounting screw 37 is smaller than the distance between the two mounting strips 35, and the outer diameter of the nail cap of the mounting screw 37 is larger than the distance between the two mounting strips 35. When the nail head of the mounting screw 37 is threadedly installed with the mounting groove on the base, the nail cap of the mounting screw 37 is pressed and conflicted with the bottom of the two mounting strips 35, ensuring that the two mounting strips 35, that is, the mounting seat 32 and the junction box 1 are firmly limited.

[0041] The remaining structure is the same as that of Example 2.

[0042] Example 4

[0043] Reference Figure 6-7, which is the fourth embodiment of the present invention. This embodiment is different from the third embodiment in that: fixing screws are detachably installed between the four corners of the box cover 4 and the junction box 1, and shaft cylinders 44 are fixedly installed at the four corners of the lower bottom of the box cover 4. The outer wall of the shaft cylinder 44 penetrates the inner cavity to open an air hole for maintaining the air pressure in the inner cavity of the shaft cylinder 44, and the bottom end of the shaft cylinder 44 is telescopically and slidably installed with a shaft rod 45 fixedly installed with the top of the lifting plate 41. The bottom end of the rotating screw 42 is threaded and extends to the bottom of the lifting plate 41, and a limiting circular block 46 is vertically fixedly installed. The outer diameter of the limiting circular block 46 is larger than the outer diameter of the nail head of the rotating screw 42, which limits the descending space of the lifting plate 41 to prevent the lifting plate 41 from descending too high and squeezing and damaging the winding reel 13.

[0044] The remaining structure is the same as that of Example 3.

[0045] Working principle of the present invention:

[0046] The first step is to adjust the positions of several mounting screws 37 according to the positions of the mounting slots on the base. The specific method is as follows: rotate the rotating seat 31 to drive the mounting seat 32 to rotate, and then select the appropriate matching mounting screws 37 according to the aperture of the mounting slot on the base. In order to ensure that the mounting screws 37 can be installed smoothly, it is necessary to adjust the distance between the two mounting strips 35. The specific method is to rotate the adjusting screw 34 to drive the corresponding mounting strip 35 to slide in the mounting hole 33, thereby adjusting the distance between the two mounting strips 35, ensuring that the nail head of the mounting screw 37 can smoothly pass through the gap between the two mounting strips 35, while the nail cap of the mounting screw 37 cannot pass through the gap between the two mounting strips 35, and finally make the nail head of the mounting screw 37 pass through the two mounting strips 35 and be smoothly threaded into the mounting slot on the base 1, and the nail cap of the mounting screw 37 is squeezed and fixed with the two mounting strips 35, that is, with the mounting seat 32, so as to realize the detachable installation of the junction box 1;

[0047] In the second step, the pressure sensor 2 is installed between the weighing platform and the base by threading the external bolt through the corresponding first threaded hole 21 and the second threaded hole 22. At this time, the pressure sensors 2 have different installation positions and therefore have different spacings from the junction box 1. At this time, it is necessary to rotate the knobs 15 under the junction box 1 respectively, and drive the corresponding winding reel 13 to rotate through the rotating rod 14, thereby driving the wire 23 to be wound around the corresponding winding reel 13, so that the length of the wire 23 between the junction box 1 and the pressure sensor 2 is appropriate, and there will be no looseness and dragging on the ground due to excessive length;

[0048] The third step is to rotate the rotating screw 42. Since the rotating screw 42 is threadedly installed with the lifting plate 41, the shaft rod 45 on the top of the lifting plate 41 is slidably inserted into the corresponding shaft cylinder 44, and the shaft cylinder 44 is installed at the bottom of the box cover 4, and the box cover 4 is detachably installed on the top of the junction box 1. Therefore, rotating the screw 42 will force the lifting plate 41 to drop in height until several extrusion round blocks 43 under the lifting plate 41 are respectively pressed and conflicted with the top of the corresponding winding drum 13, and at the same time, the winding drum 13 is limited and fixed after several rotation adjustments.

[0049] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. An overload alarm protection device for a working bucket, comprising a junction box (1) and four pressure sensors (2) arranged around the junction box, wherein the output ends of the pressure sensors (2) are connected to electric wires (23) extending into the junction box (1) and electrically connected to the junction box (1), and a box cover (4) is detachably mounted on the top of the junction box (1), characterized in that: Also includes: Four mounting components, comprising rotating seats (31) respectively rotatably mounted at four corners of the top of the junction box (1), a mounting seat (32) being mounted on one side of each rotating seat (31), each mounting seat (32) being provided with a mounting hole (33) extending through each mounting seat, two mounting strips (35) arranged in parallel being telescopically and slidably mounted in each mounting hole (33), and a mounting screw (37) passing through the two mounting strips (35) being further arranged in each mounting hole (33); A wire winding assembly comprises a wire winding reel (13) rotatably mounted at four corners of an inner cavity of a junction box (1), wherein wires (23) are respectively wound on the wire winding reels (13), a knob (15) is disposed below each of the junction boxes (1), and a rotating rod (14) is installed between each of the knobs (15) and the corresponding lower portion of the wire winding reel (13); The limiting fixing assembly comprises a rotating screw (42) which is rotatably installed and passes through the box cover (4) and extends into the junction box (1); a lifting plate (41) is threadedly sleeved on the rotating screw (42); and extrusion round blocks (43) which respectively press against corresponding winding reels (13) are installed at four corners of the lower bottom of the lifting plate (41).

2. The overload alarm protection device for a working bucket according to claim 1, characterized in that: The output end of the junction box (1) is connected to a signal line (11), and the other end of the signal line (11) is electrically connected to a meter. Two opposite outer side walls of the junction box (1) are both installed with a plurality of metal heat dissipation strips (12). The top end of the junction box (1) is provided with a notch penetrating through the inner cavity to facilitate the clamping of the box cover (4).

3. The overload alarm protection device for a working bucket according to claim 1, characterized in that: The pressure sensor (2) is provided with a first threaded hole (21) and two second threaded holes (22) extending through the pressure sensor (2). One end of the pressure sensor (2) is provided with a spring protective cover (24) sleeved on the electric wire (23).

4. The overload alarm protection device for a working bucket according to claim 1, characterized in that: The two opposite outer walls of the mounting seat (32) are both threadedly mounted with adjusting screws (34), and the adjusting screws (34) are inserted into one end of the mounting hole (33) and are rotated between the corresponding mounting strips (35) to limit the position. The two opposite outer walls of the mounting strips (35) are both vertically fixed with two T-shaped limiting shafts (36), and the two opposite outer walls of the mounting seat (32) are both penetrated through the mounting hole (33) to form a slot for facilitating the telescopic sliding of the T-shaped limiting shaft (36).

5. The overload alarm protection device for a working bucket according to claim 4, characterized in that: The mounting strip (35) is provided with a limiting groove on one side close to the corresponding adjusting screw (34); the adjusting screw (34) is vertically fixedly installed with a limiting block at one end extending into the mounting hole (33); and the limiting blocks are rotatably installed in the corresponding limiting grooves.

6. The overload alarm protection device for a working bucket according to claim 1, characterized in that: The outer diameter of the nail head of the mounting screw (37) is smaller than the distance between the two mounting strips (35), and the outer diameter of the nail cap of the mounting screw (37) is larger than the distance between the two mounting strips (35).

7. The overload alarm protection device for a working bucket according to claim 1, characterized in that: Fixing screws are detachably mounted between the four corners of the box cover (4) and the junction box (1), and shaft cylinders (44) are fixedly mounted at the four corners of the lower bottom of the box cover (4). A shaft rod (45) fixedly mounted to the top of the lifting plate (41) is telescopically and slidably mounted at the bottom end of the shaft cylinder (44).

8. The overload alarm protection device for a working bucket according to claim 1, characterized in that: The thread at the bottom end of the rotating screw (42) extends through to the bottom of the lifting plate (41), and a limiting circular block (46) is vertically fixedly installed, wherein the outer diameter of the limiting circular block (46) is larger than the outer diameter of the nail head of the rotating screw (42).

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