A test bench and a loader lifting force testing device

Abstract

This invention discloses a test platform and a loader lifting force testing device. The test platform includes: an anchor body mounted on a platform frame, a first pulley, and a second pulley; a steel wire rope connected to a force sensor has one end connected to the anchor body, and the other end passing through the first pulley and the second pulley sequentially, leading out from a set point on the platform frame, and connected to the product to be tested. This invention has a simple structure and is easy to manufacture. Furthermore, it can test the lifting force of loaders of different tonnages.

Description

Technical Field

[0001] This invention belongs to the field of loader lifting force testing technology, specifically relating to a test platform and a loader lifting force testing device. Background Technology

[0002] With the continuous development of engineering technology, the tonnage of loaders has repeatedly reached new heights. The lifting force of a loader, as a crucial technical indicator, directly affects its working efficiency and is a key performance parameter that must be measured during product development and certification.

[0003] The currently accepted industry method for testing loader lifting is as follows: a crossbeam is placed on the loader bucket, with force sensors connected to both ends of the crossbeam. The force sensors are then connected to fixed force anchor points on the foundation via steel cables for testing. The disadvantages of this testing method are:

[0004] 1. Once the test anchor points are built, they cannot be adjusted. This limits the range of products that can be tested to the original span of the anchor points, making it impossible to test large products due to their excessive width.

[0005] 2. If the design span of the anchor points is increased to meet the testing requirements of large products, the crossbeams will also be longer. Moreover, the heavier crossbeams are more difficult to place, resulting in poor safety and making them unsuitable for small products. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides a test platform and a loader lifting force testing device, which has a simple structure and is easy to manufacture. At the same time, it can test the lifting force of loaders of different tonnages.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0008] In a first aspect, a test platform is provided, comprising: an anchor body, a first pulley, and a second pulley mounted on a platform frame; a steel wire rope connected to a force sensor is connected at one end to the anchor body, and at the other end passes through the first pulley and the second pulley in sequence, leading out from a set point on the platform frame and connected to the product to be tested.

[0009] Furthermore, the platform frame includes: a base plate installed on the foundation; side plates connected to the base plate; and two side plates arranged parallel and symmetrically on the base plate to form a U-shaped groove structure.

[0010] Furthermore, the anchor body includes: a vertical plate located at one end of the side plate and connected to the bottom plate and the side plate respectively; a horizontal plate connected to the side plate and the vertical plate respectively; and a fine-tuning device installed between the bottom plate, the side plate, the vertical plate and the horizontal plate and connected to one end of the wire rope.

[0011] Furthermore, the fine-tuning device includes a screw, a nut, and a guide plate. One end of the screw has a threaded structure, and the other end has a connecting hole in the radial direction. The connecting hole is used to connect a steel wire rope. The guide plate is installed in the middle of the screw and is perpendicular to the screw axis. The threaded end of the screw passes through the round hole on the vertical plate and is installed in conjunction with the nut. The guide plate is confined in the space enclosed by the side plates, the bottom plate, and the horizontal plate, and is in contact with the side plates, the bottom plate, and the horizontal plate.

[0012] Furthermore, at the ends of the two side plates away from the upright plate, a plurality of first mounting holes are symmetrically arranged in a diagonal straight line from bottom to top, and the first pulley is installed between one pair of the first mounting holes.

[0013] Furthermore, an outer panel is provided on the side plate, and the outer panel is provided with first circular holes that correspond one-to-one with the first mounting holes.

[0014] Furthermore, two guide bars are provided on the side plate, which are symmetrically arranged on both sides of the line connecting the centers of the first mounting holes and are parallel to the line connecting the centers of the first mounting holes.

[0015] Furthermore, a first flange plate is provided on the side of the first pulley, the first flange plate being used to confine the first pulley between the guide bars.

[0016] Furthermore, a plurality of second mounting holes are symmetrically arranged in a horizontal straight line at one end of the two side plates near the upright plate and on the side away from the bottom plate, and the second pulley is installed between one pair of the second mounting holes.

[0017] Furthermore, an inner plate is provided on the side plate, and the inner plate is provided with a second circular hole that corresponds one-to-one with the second mounting hole.

[0018] Furthermore, the second pulley is provided with second flange plates on both sides, and the second flange plates are provided with mounting holes for mounting the rolling rod, and the rolling rod makes rolling contact with the upper edge of the inner plate.

[0019] Secondly, a loader lifting force testing device is provided, comprising the test platform as described in the first aspect, two test platforms being installed on a foundation at a set distance apart, and the second pulleys of the two test platforms being arranged opposite to each other; one end of the steel wire rope in each test platform is led out from a set point on the platform frame through the second pulley and connected to the bucket of the loader.

[0020] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: The present invention installs the anchor body, the first pulley and the second pulley on the platform frame; one end of the steel wire rope connected to the force sensor is connected to the anchor body, and the other end passes through the first pulley and the second pulley in sequence and is led out from the set point on the platform frame and connected to the product to be tested; the structure is simple and easy to manufacture, and at the same time, it can test the lifting force of loaders of different tonnages. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of a loader lifting force testing device provided in an embodiment of the present invention;

[0022] Figure 2 yes Figure 1 Top view of the test bench;

[0023] Figure 3 yes Figure 1 Front view of the test bench body;

[0024] Figure 4 yes Figure 3 A longitudinal cross-sectional schematic diagram;

[0025] In the diagram: 2. Hook; 3. Force sensor; 4. Wire rope; 5. Shackle; 6. Loader; 7. Foundation; 10. Platform frame; 11. First pulley; 12. First pin; 13. Second pulley; 14. Second pin; 15. Rolling rod; 17. Guide bar; 18. Limiting plate; 19. Bolt; 101. Base plate; 102. Side plate; 103. Vertical plate; 104. Horizontal plate; 105. Inner plate; 106. Outer plate; 107. Rib plate; 161. Screw; 162. Nut; 163. Guide plate. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0027] Example 1

[0028] like Figures 1-4 As shown, a test platform includes: an anchor body, a first pulley 11 and a second pulley 13 mounted on a platform frame 10; a steel wire rope 4 connected to a force sensor 3 is connected at one end to the anchor body, and the other end passes through the first pulley 11 and the second pulley 13 in sequence to be led out from a set point on the platform frame 10 and connected to the product to be tested.

[0029] The platform frame 10 includes: a base plate 101 installed on the foundation 7; side plates 102 connected to the base plate 101; two side plates 102 are arranged in parallel and symmetrically on the base plate 101 to form a U-shaped groove structure; and multiple stiffening plates 107 are provided between the side plates 102 and the base plate 101 to strengthen the rigidity of the U-shaped groove structure.

[0030] The anchor body includes: a vertical plate 103 located at one end of the side plate 102 and perpendicularly connected to the bottom plate 101 and the side plate 102 respectively; a horizontal plate 104 perpendicularly connected to the side plate 102 and the vertical plate 103 respectively; and a fine-tuning device installed between the bottom plate 101, the side plate 102, the vertical plate 103 and the horizontal plate 104 and connected to one end of the wire rope 4.

[0031] The fine-tuning device includes a screw 161, a nut 162, and a guide plate 163. One end of the screw 161 is threaded, and the other end has a connecting hole along the radial direction for connecting the wire rope 4. The guide plate 163 is welded to the middle of the screw 161 and is perpendicular to the axis of the screw 161. The threaded end of the screw 161 passes through the round hole on the vertical plate 103 from the inside to the outside and is then installed in conjunction with the nut 162. The guide plate 163 is confined within the side plates 102, the bottom plate 101, and the horizontal plate 104. The enclosed space, in contact with the side plates 102, the bottom plate 101, and the horizontal plate 104, allows the screw 161 to move laterally by rotating the nut 162, which is used to adjust the length of the wire rope 4, thereby adjusting the position of the first pulley 11 so that the first pulley 11 can be installed on the side plate 102; during the adjustment process, the guide plate 163 is slidably connected with the horizontal plate 104, the bottom plate 101, and the side plate 102 to limit the axis of the screw 161 to remain basically unchanged.

[0032] On the side plates 102 of the platform frame 10, at the end away from the upright plate 103, a row of first mounting holes arranged diagonally in a straight line is symmetrically opened from bottom to top; on the side plates 102 near the upright plate 103 and away from the bottom plate 101, a row of second mounting holes arranged transversely in a straight line is symmetrically opened. The first pulley 11 and the second pulley 13 are both installed between the side plates 102 of the platform frame. The first pulley 11 is selectively engaged with any pair of diagonal holes (first mounting holes) on the side plates 102 via a first pin 12; the second pulley 13 is selectively engaged with any pair of transverse holes (second mounting holes) on the side plates 102 via a second pin 14. Both the first pulley 11 and the second pulley 13 are circular grooved roller structures. The first pulley 11 has a through hole in its central axis for installing the first pin 12, and the second pulley 13 has a through hole in its central axis for installing the second pin 14. The grooved space can accommodate the wire rope 4.

[0033] Each side plate 102 of the platform frame 10 has two guide bars 17 mounted on its inner side via bolts 19, parallel to the direction of the oblique holes on the side plate 102. The guide bars 17 are symmetrically distributed on both sides of the line connecting the centers of the oblique holes. The circumferential surface of the first flange plate located on the outer side of the first pulley 11 is confined within these guide bars 17 and can be rolled for adjustment. Limiting plates 18 are mounted on the inner side of each side plate 102 of the platform frame 10 at the end away from the vertical plate 103 via bolts, which can prevent the first pulley 11 from detaching from the platform frame during adjustment or installation.

[0034] Both sides of the two side plates 102 are provided with outer plates 106, each with a row of first circular holes arranged in a straight line, corresponding one-to-one with the oblique holes on the side plates 102. Both sides of the two side plates 102 are provided with inner plates 105, each with a row of second circular holes arranged in a straight line, corresponding one-to-one with the transverse holes on the side plates 102. The upper edge of the inner plates 105 is lower than the upper edge of the side plates 102. The two sides of the second pulley 13 are respectively provided with second flange plates, each with two circular holes on its upper side. A rolling rod 15 is installed through the circular holes with clearance fit. The two ends of the rolling rod 15 are in contact with the upper edge surfaces of the left and right inner plates 105, and the rolling rod 15 is axially limited between the two side plates 102 of the platform frame. The second pulley 13 can be adjusted horizontally through the rolling rod 15.

[0035] One end of the steel wire rope 4, connected to the force sensor 3, is connected to the connecting hole on the screw 161 via a shackle 5. The other end passes sequentially through the first pulley 11 and the second pulley 13, exiting from a set point on the platform frame 10, and is connected to the bucket of the loader 6 via a hook 2. The test platform described in this invention features a simple structure and ease of manufacturing. Furthermore, it can test the lifting force of loaders of different tonnages. This invention can be used individually with a single test platform, or in combination with two or more test platforms.

[0036] Example 2

[0037] Based on the test platform described in Embodiment 1, this embodiment provides a loader lifting force testing device. Two test platforms are installed on the foundation 7 at a set distance apart, and the second pulleys 13 of the two test platforms are arranged opposite to each other. One end of the steel wire rope 4 in each test platform is led out from the set point on the platform frame 10 through the second pulley 13 and connected to the bucket of the loader 6.

[0038] like Figure 1 As shown, the test platform is fixed on the foundation 7. One end of the hook 2 is hooked onto the side plate of the bucket of the loader 6. The other end of the hook 2 is connected to the force sensor 3 through a shackle. One end of the wire rope 4 is connected to the screw 161 through a shackle 5. The other end of the wire rope 4 passes around the first pulley 11 and the second pulley 13 from bottom to top. The through-hole shackle 5 is connected to the end of the force sensor 3 away from the hook 2.

[0039] During the connection and installation test, first remove the first pin 12 and the second pin 14. Adjust the loader 6 to be positioned between a pair of test platforms. After completing the connection and installation as described above, adjust the lifting height and front-to-back position of the loader 6 so that the two wire ropes 4 are parallel and perpendicular to the ground. At this point, adjust the position of the second pulley 13 and fix it with the second pin 14. Then adjust the fine-tuning device so that the first pulley 11 mates with the nearest oblique hole and is fixed with the first pin 12. After the test is completed, simply remove the first pin 12, operate the working device of the loader 6 to lower it, and the first pulley 11 will roll along the guide bar 17 under its own weight, thus retrieving the wire rope 4.

[0040] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A loader lifting force testing device, characterized in that, The test platform includes: An anchor body, first pulley (11) and second pulley (13) are installed on the platform frame (10); Two test benches are installed on the foundation at a set distance apart, and the second pulleys (13) of the two test benches are arranged opposite each other; in each test bench, one end of the wire rope (4) is connected to the anchor body through a fine-tuning device, and the other end passes through the first pulley (11) and the second pulley (13) in sequence from the set point on the bench frame (10) and is connected to one end of the force sensor (3), and the other end of the force sensor (3) is connected to the bucket of the loader; The fine-tuning device includes a screw (161), a nut (162), and a guide plate (163). One end of the screw (161) has a threaded structure, and the other end has a connecting hole in the radial direction. The connecting hole is used to connect the wire rope (4). The guide plate (163) is installed in the middle of the screw (161) and is perpendicular to the screw axis. The threaded end of the screw (161) passes through the round hole on the anchor body and is installed in conjunction with the nut (162). The guide plate (163) is slidably connected to the anchor body. The first pulley (11) is pinned to the first mounting hole on the platform frame (10) via the first pin (12); the second pulley (13) is pinned to the second mounting hole on the platform frame (10) via the second pin (14); During the test, the lifting height and front and rear positions of the loader are adjusted so that the wire ropes (4) on both sides are parallel and perpendicular to the ground. At this time, the position of the second pulley (13) is adjusted and fixed with the second pin (14). Then, the fine adjustment device is adjusted so that the first pulley (11) is engaged with the corresponding first mounting hole and fixed with the first pin (12). After the test is completed, the first pin (12) is removed and the working device of the loader is lowered. The first pulley (11) rolls along the guide bar (17) set on the platform frame (10) under its own weight, so that the wire rope (4) is recovered.

2. The loader lifting force testing device according to claim 1, characterized in that, The platform frame (10) includes: The base plate (101) is installed on the foundation (7); Side plate (102) connected to the base plate (101); The two side plates (102) are arranged in parallel and symmetrically on the base plate (101) and form a U-shaped groove structure.

3. The loader lifting force testing device according to claim 2, characterized in that, The anchor body includes: A vertical plate (103) located at one end of the side plate (102) and connected to the bottom plate (101) and the side plate (102) respectively. A horizontal plate (104) is connected to the side plate (102) and the vertical plate (103) respectively. The fine-tuning device is installed between the base plate (101), side plate (102), vertical plate (103), and horizontal plate (104).

4. The loader lifting force testing device according to claim 3, characterized in that, The upright plate (103) is provided with a circular hole for the threaded end of the screw (161) to pass through. The guide plate (163) is confined in the space enclosed by the two side plates (102), the bottom plate (101), and the horizontal plate (104), and is in contact with the two side plates (102), the bottom plate (101), and the horizontal plate (104).

5. The loader lifting force testing device according to claim 3, characterized in that, At one end of the two side plates (102) away from the vertical plate (103), a plurality of first mounting holes are symmetrically arranged in a diagonal straight line from bottom to top, and the first pulley (11) is installed between one pair of the first mounting holes.

6. The loader lifting force testing device according to claim 5, characterized in that, An outer panel (106) is provided on the side plate (102), and the outer panel (106) is provided with a first round hole corresponding to the first mounting hole.

7. The loader lifting force testing device according to claim 5, characterized in that, Two guide bars (17) are provided on the side plate (102). The two guide bars (17) are symmetrically arranged on both sides of the line connecting the centers of the first mounting holes and are parallel to the line connecting the centers of the first mounting holes.

8. The loader lifting force testing device according to claim 7, characterized in that, The first pulley (11) has a first flange plate on its side, which is used to limit the first pulley (11) between the guide bars (17).

9. The loader lifting force testing device according to claim 3, characterized in that, On one end of the two side plates (102) near the upright plate (103) and on the side away from the bottom plate (101), a plurality of second mounting holes are symmetrically arranged in a horizontal straight line, and the second pulley (13) is installed between one pair of the second mounting holes.

10. The loader lifting force testing device according to claim 9, characterized in that, An inner plate (105) is provided on the side plate (102), and the inner plate (105) is provided with a second round hole that corresponds one-to-one with the second mounting hole.

11. The loader lifting force testing device according to claim 10, characterized in that, The second pulley (13) has a second flange plate on both sides, and the second flange plate has a mounting hole for mounting a rolling rod (15). The rolling rod (15) rolls and contacts the upper edge of the inner plate (105).

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