Device for detecting wheel pressure of hoisting machinery

Abstract

The utility model relates to a hoisting machinery wheel pressure detection device, which comprises a pattern and strain gauges, the upper surface of the pattern is provided with a clamp groove, two sides of the bottom of the pattern are provided with strip grooves, a plurality of strain gauges are arranged in the strip grooves in a line, the left end and the right end of the pattern are provided with slope surfaces, and the slope surfaces are connected with the clamp groove. An arc end is arranged at the end of the outer side of the slope face, and a clamp fixing piece is arranged in the clamp groove. The wheel pressure detection device can solve various problems caused by non-uniform pressure of large wheels in actual detection equipment, is suitable for all wheels, and indirectly determines the wheel pressure of the wheels through detection pattern strain.

Description

Technical Field

[0001] The utility model relates to the technical field of wheel pressure of hoisting machinery, in particular to a device for detecting the wheel pressure of hoisting machinery. Background Art

[0002] The wheel pressure of hoisting machinery is a key and important parameter in the design and manufacture of cranes. The maximum value of the wheel pressure of hoisting machinery not only affects the design of the overall structure of hoisting machinery, but also is the main design basis for the track foundation. By detecting the wheel pressure of hoisting machinery, the specific situation of the load distribution of the equipment can be understood, and timely adjustments can be made to the uneven load distribution situation to avoid potential safety hazards such as partial load of hoisting machinery, asynchronous operation of the trolley, climbing of the track, and excessive wear of the wheels. Correctly selecting the device for detecting the wheel pressure of hoisting machinery will contribute to engineering practice, help to further strengthen the crane evaluation business, and play a significant role in aspects such as crane track adjustment and overall machine safety. The application has a broad market prospect and can bring considerable results transformation business in the future. However, various problems caused by uneven wheel pressure of large wheels in engineering practice cannot be solved according to traditional devices. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a device for detecting the wheel pressure of hoisting machinery, which can solve various problems caused by uneven wheel pressure of large wheels in the actual detection equipment, and is applicable to all wheels, and indirectly determine the wheel pressure of the wheels by detecting the strain of the specimen.

[0004] To achieve the above purpose, the utility model provides the following technical solution: A device for detecting the wheel pressure of hoisting machinery, including a specimen and a strain gauge. A fixture groove is opened on the upper surface of the specimen. Long grooves are opened on both sides of the bottom of the specimen. A plurality of strain gauges are arranged in a row in the long grooves. Slope surfaces are arranged at both left and right ends of the specimen. An arc end is arranged at the outer end of the slope surface. A fixture fixing member is arranged in the fixture groove.

[0005] Further, the fixture fixing member includes a U-shaped fixture plate and a wedge block. A slot is opened in the vertical direction at the lower end of the U-shaped fixture plate. A first threaded hole is opened on the wedge block. A first bolt is sleeved in the first threaded hole. The wedge block is fixed on the slot by locking with the first bolt and a nut.

[0006] Further, two second threaded holes are opened on both left and right sides of the U-shaped fixture plate. A top groove opposite to the position of the second threaded hole is opened on the wedge block. A second bolt for locking with the second threaded hole is arranged on the top groove.

[0007] Further, the strain gauge is a welded strain gauge sensor.

[0008] Furthermore, the material of the pattern is alloy steel.

[0009] Furthermore, a wire management groove is provided between the long grooves on both sides.

[0010] Furthermore, the cable management groove is in a fishbone shape.

[0011] Furthermore, the edge of the pattern is configured to be a chamfered shape.

[0012] Furthermore, the groove wall thickness of the clamp groove is 6 mm.

[0013] Furthermore, the distance between the plurality of strain gauges is 10 mm, and the thickness of the pattern is 13-18 mm.

[0014] The beneficial effects of the utility model are as follows: the wheel pressure of the wheel is indirectly determined by detecting the pattern strain. The utility model device has the following advantages: no surface treatment is required, and the measurement is convenient; it is applicable to all wheels and can be directly compared; the measurement results are reliable and repeatable; it is easy to install and disassemble, the measurement cost is low, and it is suitable for engineering practice. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the pattern of the present invention;

[0016] Figure 2 for Figure 1 The enlarged view of point A in the middle;

[0017] Figure 3 It is a front view of the pattern of the present invention;

[0018] Figure 4 For the present invention Figure 3 Bottom view in

[0019] Figure 5 For the present invention Figure 3 Cross-section along the middle BB direction;

[0020] Figure 6 It is a structural schematic diagram of the U-shaped fixture plate of the present invention;

[0021] Figure 7 It is a structural schematic diagram of the wedge block of the present invention;

[0022] Figure 8 is a cross-sectional view of a wedge of the present invention;

[0023] Figure 9 for Figure 8 Cross-sectional view in the AA direction.

[0024] Wherein: 1. Pattern, 2. Long strip groove, 3. Slope surface, 4. Fixture fixing part, 41. U-shaped fixture plate, 42. Wedge block, 43. Groove, 44. First threaded hole, 45. Second threaded hole, 46. Top groove, 47. First bolt, 48. Second bolt, 49. Nut, 5. Arc end, 6. Cable management groove, 7. Fixture groove, 8. Track. Detailed implementation manner

[0025] The following further describes the present utility model with reference to the accompanying drawings.

[0026] Please refer to Figures 1 to 9 , the present utility model provides an embodiment: A device for detecting the wheel pressure of a hoisting machine, including a pattern and a strain gauge. A fixture groove 7 is opened on the upper surface of the pattern. Long strip grooves 2 are opened on both sides of the bottom of the pattern 1. A plurality of strain gauges are provided and arranged in a row in the long strip groove 2. Arc ends 5 are provided at the outer ends of the slope surfaces 3 on the left and right ends of the pattern 1. A fixture fixing part 4 is arranged in the fixture groove 7. The length of the long strip groove 2 of the pattern 1 can be designed to be 450 mm. At this time, seven strain gauges can be placed in the long strip groove 2 on one side. Generally, the installation method of the resistance strain gauge is pasting. The resistance strain gauge is placed in the long strip groove 2. Five strain gauges are preferably designed in the long strip groove 2 on one side. Then, there are a total of 10 strain gauges in the long strip grooves 2 on the left and right sides. The pattern 1 can be fixed on the track through the cooperation of the fixture fixing part 4 and the fixture groove 7. When the crane wheel rolls over the pattern 1, the strain gauges at different positions in the long strip groove 2 can obtain the strain data at each position.

[0027] Please continue to refer to Figures 1 to 9 As shown, in an embodiment of the present utility model, the fixture fixing part 4 includes a U-shaped fixture plate 41 and a wedge block 42. A groove 43 is opened in the vertical direction at the lower end of the U-shaped fixture plate 41. A first threaded hole 44 is opened on the wedge block 42. A first bolt is sleeved in the first threaded hole 44. The wedge block 42 is locked through the first bolt and the nut, and the wedge block 42 is fixed on the groove 43. According to the cross-sectional shape of the track, the U-shaped fixture plate 41 is designed, and a fixture groove 7 is opened on the pattern 1 to install the fixture fixing part 4. Through the clamping force of the fixture fixing part 4, the pattern 1 is firmly fixed on the track. A groove 43 is opened in the vertical direction on the U-shaped fixture plate 41, so that the wedge block 42 is fixed on the groove 43 through the cooperation of the first bolt and the nut. The wedge block 42 can move upward to clamp the track and fix the position of the pattern. A bolt hidden groove is opened in the first threaded hole 44 on the wedge block 42, so that the bolt can be hidden in the wedge block 42 to prevent affecting the clamping of the wedge block 42 and the track. The length of the opening groove of the pattern 1 is 60 mm to 100 mm, preferably 100 mm.

[0028] Please continue to refer to Figure 1, Figure 2 and Figure 6 As shown in Figure 2 and Figure 6 , in an embodiment of the present utility model, two second threaded holes 45 are provided on both the left and right sides of the U-shaped fixture plate 41. A top groove 46 is provided on the wedge block 42 at a position corresponding to the second threaded hole 45, and a second bolt for locking with the second threaded hole is provided on the top groove. Two threaded second threaded holes 45 are drilled on both the left and right sides of the U-shaped fixture plate 41, and two top grooves 46 are milled on both the left and right sides of the wedge block 42. Two fixing bolts are added to both the left and right sides of the U-shaped fixture plate 41. The bolts pass through the second threaded holes 45 and then press against the grooves of the wedge block 42, so that the wedge block 42 is clamped on the track, thereby clamping the specimen 1 on the track.

[0029] Please continue to refer to Figures 1 to 9 As shown in Figures 1 to 9 , in an embodiment of the present utility model, the strain gauge is a welded strain gauge sensor. When a welded strain gauge sensor is adopted, the model of the welded strain gauge sensor is DH1102. Compared with the pasted strain gauge, the installation method of the welded strain gauge sensor is spot welding installation, which is convenient, fast, firm and reliable, and is suitable for long-term stress detection of metal structures.

[0030] Please continue to refer to Figures 1 to 9 As shown in Figures 1 to 9 , in an embodiment of the present utility model, the material of the specimen 1 is alloy steel. The material of the specimen 1 is selected as 40CrNiMo. 40CrNiMo is a kind of alloy steel with high strength and high toughness.

[0031] Please continue to refer to Figure 4 As shown in Figure 4 , in an embodiment of the present utility model, a cable management groove 6 is provided between the two long grooves 2 on both sides. Interference will occur between the two sides of the wheel and the strain gauge component, resulting in the fracture and detachment of the strain gauge. The cable management groove 6 can straighten the cables of the strain gauge sensor and hide the front end of the strain gauge sensor. At the same time, the cable management groove 6 can make the specimen 1 have good structural strength.

[0032] Please continue to refer to Figure 4 As shown in Figure 4 , in an embodiment of the present utility model, the cable management groove 6 is in a fishbone shape.

[0033] Please continue to refer to Figures 1 to 5 As shown in Figures 1 to 5 , in an embodiment of the present utility model, the edge of the specimen 1 is set to a chamfered shape. The edge chamfer can avoid stress concentration at both edges of the specimen 1.

[0034] Please continue to refer to Figures 1 to 5 As shown in Figures 1 to 5 , in an embodiment of the present utility model, the wall thickness of the fixture groove 7 is 6 mm. If the fixture groove 7 is too deep, the structure here will be relatively weak, resulting in stress concentration and easy fracture.

[0035] Please continue to refer to Figures 1 to 5As shown, in an embodiment of the present utility model, the distance between multiple strain gauges is 10 mm, and the thickness of the specimen 1 is 13 - 18 mm. The thickness of the specimen 1 is preferably 18 mm, which can ensure the structural strength of the specimen 1 while reducing the processing cost of the specimen 1.

[0036] The present utility model has the following working principle: Combine the specimen and the sensor together, and the specimen can be fixed on the track through the cooperation of the fixture and the wedge block. Then, through the test of the field crane wheel rolling over the specimen, use the sensor on the specimen to obtain the deformation and transmit and process the signal to obtain the strain data at each position, and obtain the wheel pressure value through the strain data.

[0037] The above are only the preferred embodiments of the present utility model and should not be construed as limitations to this application. Any equivalent changes and modifications made according to the scope of the patent application of the present utility model shall fall within the scope of the present utility model.

Claims

1. A device for detecting the wheel pressure of a hoisting machine, characterized in that: It includes a specimen and strain gauges. A fixture groove is formed on the upper surface of the specimen. Long grooves are formed on both sides of the bottom of the specimen. A plurality of strain gauges are arranged in a line in the long grooves. Slope surfaces are provided at both left and right ends of the specimen, and arc ends are provided at the outer ends of the slope surfaces. A fixture fixing member is arranged in the fixture groove.

2. The device for detecting the wheel pressure of a hoisting machine according to claim 1, wherein: The strain gauge is a welded strain gauge sensor.

3. The device for detecting the wheel pressure of a hoisting machine according to claim 1, characterized in that: The material of the specimen is alloy steel.

4. The device for detecting the wheel pressure of a hoisting machine according to claim 1, wherein: A wire management groove is arranged between the long grooves on both sides.

5. The device for detecting wheel pressure of a hoisting machine according to claim 4, characterized in that: The wire management groove is in a fishbone shape.

6. The device for detecting the wheel pressure of a hoisting machine according to claim 1, wherein: The edge of the specimen is set in a chamfered shape.

7. The device for detecting wheel pressure of a hoisting machine according to claim 1, characterized in that: The wall thickness of the fixture groove is 6 mm.

8. The device for detecting the wheel pressure of a hoisting machine according to claim 1, characterized in that: The distance between the plurality of strain gauges is 10 mm, and the thickness of the specimen is 13 - 18 mm.

9. The device for detecting the wheel pressure of a hoisting machine according to claim 1, wherein: The fixture fixing member includes a U-shaped fixture plate and a wedge block. A slot is formed in the vertical direction at the lower end of the U-shaped fixture plate. A first threaded hole is formed in the wedge block, and a first bolt is sleeved in the first threaded hole. The wedge block is fixed to the slot through the first bolt and a nut.

10. The device for detecting the wheel pressure of a hoisting machine according to claim 9, characterized in that: Two second threaded holes are formed on both left and right sides of the U-shaped fixture plate. A top groove opposite to the position of the second threaded hole is formed in the wedge block, and a second bolt for locking with the second threaded hole is arranged on the top groove.

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