Testing device for falling object protection structure of agriculture and forestry tractor

Abstract

The utility model discloses a testing device for a falling object protection structure of an agriculture and forestry tractor, which relates to the field of testing devices and comprises a testing box, a box cover is arranged at the bottom of the side wall of the testing box, a winch is fixedly arranged at the top of the testing box, a first lifting rope is wound on the winch, a second lifting rope is arranged at the tail end of the first lifting rope, and the second lifting rope is connected with the testing box. A drop hammer is fixedly arranged at the lower end of the second lifting rope, and an electromagnetic lock mechanism is arranged between the first lifting rope and the second lifting rope. According to the utility model, a closed test structure is adopted, so that the phenomenon that splashes hurt people can be avoided, and the test safety is higher.

Description

Technical Field

[0001] The utility model relates to the field of test devices, in particular to a test device for a falling object protection structure of an agricultural and forestry tractor. Background Art

[0002] At present, domestic tests and inspections on tractor safety performance mainly involve tests and inspections on rollover protection structures and falling object protection structures. In recent years, due to the large number of application scenarios of tractors, they are often exposed to environments with potential dangers of falling objects during operation. At the same time, with the industry and users' requirements for safety protection and the attention of relevant national departments, falling object protection structure tests may also appear in the mandatory test items for promotion and appraisal in the future.

[0003] For example, patent number CN219104596U discloses a test device for falling object protection structure of agricultural and forestry tractors, including: a circular disc seat, an electromagnet, a drop hammer, a laser ranging sensor, a sensor mounting bracket, an electromagnetic lock, an electromagnetic lock bracket, an electromagnetic lock socket seat, a damping cylinder, a controller, and a thin steel wire rope.

[0004] In the above scheme, the protective structure is tested by raising the falling hammer and then letting it fall freely. However, since the test device is open, the protective structure will fly and splash after being hit, which may cause injuries. Therefore, a test device for the falling object protection structure of agricultural and forestry tractors is proposed. Utility Model Content

[0005] In view of the problems existing in the above-mentioned existing test devices, the present utility model is proposed.

[0006] Therefore, the purpose of the utility model is to provide a test device for the falling object protection structure of agricultural and forestry tractors, which solves the problems raised by the background technology.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A test device for a falling object protection structure of an agricultural and forestry tractor comprises a test box, a box cover is provided at the bottom of the side wall of the test box, a winch is fixedly provided on the top of the test box, a first lifting rope is wound on the winch, a second lifting rope is provided at the end of the first lifting rope, a drop weight is fixedly provided at the lower end of the second lifting rope, and an electromagnetic locking mechanism is provided between the first lifting rope and the second lifting rope.

[0009] Preferably, the electromagnetic lock mechanism includes a lock sleeve, a lock block, an electromagnetic block, a permanent magnet block, a lock core and a spring, the lock block is inserted into the interior of the lock sleeve, the lock sleeve and the lock block are respectively fixedly arranged on the ends of the first hanging rope and the second hanging rope, both sides of the lock sleeve are provided with a cavity, the electromagnetic block is fixedly arranged on the side wall of the cavity, the permanent magnet block is laterally slidably arranged in the interior of the cavity and is connected by a spring, the lock core is fixedly arranged on the side wall of the permanent magnet block, and the side wall of the lock block is provided with a lock groove matching the lock core.

[0010] Preferably, the electromagnetic block is connected in series with an external control circuit.

[0011] Preferably, a placement seat is fixedly provided on the side wall of the box cover, and a roller that is rolled with the bottom of the test box is fixedly provided on the bottom of the placement seat.

[0012] Furthermore, the test box is made of a box body spliced ​​with transparent acrylic panels.

[0013] Preferably, a scale rod is fixedly provided on the side wall of the test box in the vertical direction.

[0014] In the above technical solution, the technical effects and advantages provided by the utility model are:

[0015] 1. The utility model is provided with a test box, a winch, a first lifting rope, a second lifting rope and a drop hammer. When the winch is working, the first lifting rope can be wound around so that the drop hammer is lifted upward, and then the drop hammer is dropped and hits the falling object protection structure to perform the experiment. Since the whole process is carried out inside the test box, the phenomenon of splashing objects injuring people can be avoided, and the height of the drop hammer can be freely adjusted, so that the intensity of the hammer test on the falling object protection structure can be adjusted.

[0016] 2. The utility model is provided with a lock sleeve, a lock block, an electromagnetic block, a permanent magnet block, a lock core and a spring. After the electromagnetic block is powered on, the electromagnetic block generates magnetic force and attracts the permanent magnet block, so that the permanent magnet block drives the lock core to move out of the lock slot. At this time, the lock sleeve and the lock block are separated, so that the drop hammer can fall freely and hit the falling object protection structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0018] Figure 1 It is a schematic diagram of the structure of the utility model;

[0019] Figure 2For the utility model Figure 1 Schematic diagram of the structure of the electromagnetic lock mechanism.

[0020] Description of reference numerals:

[0021] 1. Test box; 2. Box cover; 3. Winch; 4. First lifting rope; 5. Second lifting rope; 6. Drop weight; 7. Lock sleeve; 8. Lock block; 9. Electromagnetic block; 10. Permanent magnet block; 11. Lock core; 12. Spring; 13. Placement seat; 14. Roller; 15. Scale rod. DETAILED DESCRIPTION

[0022] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0023] The utility model embodiment discloses a test device for a falling object protection structure of an agricultural and forestry tractor.

[0024] The utility model provides Figure 1-2 The test device for the falling object protection structure of an agricultural and forestry tractor shown in the figure comprises a test box 1, a box cover 2 is provided at the bottom of the side wall of the test box 1, a winch 3 is fixedly provided on the top of the test box 1, a first lifting rope 4 is wound on the winch 3, a second lifting rope 5 is provided at the end of the first lifting rope 4, and a drop hammer 6 is fixedly provided at the lower end of the second lifting rope 5, an electromagnetic lock mechanism is provided between the first lifting rope 4 and the second lifting rope 5, the winch 3 can wind the first lifting rope 4 when working, and then lift the drop hammer 6 upward through the second lifting rope 5, and then the drop hammer 6 falls and hits the falling object protection structure to conduct an experiment, since the whole process is carried out inside the test box 1, the phenomenon of splashing objects injuring people can be avoided, and the height of the drop hammer 6 can be freely adjusted, so that the strength of the hammer test on the falling object protection structure can be adjusted; the test box 1 adopts a transparent acrylic plate to splice the box body, the acrylic material is not only high in strength but also high in transparency, and a scale rod 15 is fixedly provided on the side wall of the test box 1 in the vertical direction, and the scale rod 15 is convenient for people to observe the lifting height of the drop hammer 6.

[0025] In order to enable the first suspension rope 4 and the second suspension rope 5 to be automatically separated, as Figure 1-2As shown, the electromagnetic lock mechanism includes a lock sleeve 7, a lock block 8, a through electromagnetic block 9, a permanent magnet block 10, a lock core 11 and a spring 12. The lock block 8 is inserted into the interior of the lock sleeve 7. The lock sleeve 7 and the lock block 8 are respectively fixedly arranged on the ends of the first hanging rope 4 and the second hanging rope 5. Both sides of the lock sleeve 7 are provided with cavities. The through electromagnetic block 9 is fixedly arranged on the side wall of the cavity. The through electromagnetic block 9 is connected in series with an external control circuit. The permanent magnet block 10 is laterally slidably arranged inside the cavity and connected through the spring 12. The lock core 11 is fixedly arranged on the side wall of the permanent magnet block 10. The lock block The side wall of 8 is provided with a lock groove that matches the lock core 11. After the power of the electromagnetic block 9 is turned on, the electromagnetic block 9 generates magnetic force and attracts the permanent magnet block 10, so that the permanent magnet block 10 drives the lock core 11 to move out from the inside of the lock groove. At this time, the lock sleeve 8 and the lock block 7 are separated, so that the drop hammer 6 can fall freely and hit the falling object protection structure. Before the power of the electromagnetic block 9 is turned on, the spring 12 applies elastic force to the permanent magnet block 10, so that the end of the lock core 11 is inserted into the internal groove of the lock groove, which can fix the position between the lock sleeve 8 and the lock block 7.

[0026] Finally, in order to facilitate the placement of the falling object protection structure into the test chamber 1, as shown in FIG. Figure 1 As shown, a placement seat 13 is fixedly provided on the side wall of the box cover 2, and a roller 14 is fixedly provided at the bottom of the placement seat 13 and is rolled with the bottom of the test box 1. The falling object protection structure can be placed inside the placement seat 13 and then pushed into the interior of the test box 1 through the roller 14.

[0027] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A test device for a falling object protection structure of an agricultural and forestry tractor, comprising a test box (1), characterized in that: A box cover (2) is provided at the bottom of the side wall of the test box (1), a winch (3) is fixedly provided at the top of the test box (1), a first lifting rope (4) is wound on the winch (3), a second lifting rope (5) is provided at the end of the first lifting rope (4), and a drop weight (6) is fixedly provided at the lower end of the second lifting rope (5), and an electromagnetic lock mechanism is provided between the first lifting rope (4) and the second lifting rope (5).

2. The test device for the falling object protection structure of agricultural and forestry tractors according to claim 1, characterized in that: The electromagnetic lock mechanism comprises a lock sleeve (7), a lock block (8), an electromagnetic block (9), a permanent magnet block (10), a lock core (11) and a spring (12); the lock block (8) is inserted into the lock sleeve (7); the lock sleeve (7) and the lock block (8) are respectively fixedly arranged on the ends of the first hanging rope (4) and the second hanging rope (5); cavities are arranged on both sides of the lock sleeve (7); the electromagnetic block (9) is fixedly arranged on the side wall of the cavity; the permanent magnet block (10) is arranged in the cavity in a transverse sliding manner and is connected by a spring (12); the lock core (11) is fixedly arranged on the side wall of the permanent magnet block (10); and the side wall of the lock block (8) is provided with a lock groove matching the lock core (11).

3. The test device for the falling object protection structure of agricultural and forestry tractors according to claim 2, characterized in that: The electromagnetic block (9) is connected in series with an external control circuit.

4. The test device for the falling object protection structure of agricultural and forestry tractors according to claim 1, characterized in that: A placement seat (13) is fixedly provided on the side wall of the box cover (2), and a roller (14) is fixedly provided on the bottom of the placement seat (13) and is arranged to roll with the bottom of the test box (1).

5. The test device for the falling object protection structure of agricultural and forestry tractors according to claim 1, characterized in that: The test box (1) is made of a box body spliced ​​with transparent acrylic plates.

6. The test device for the falling object protection structure of agricultural and forestry tractors according to claim 1, characterized in that: A scale rod (15) is fixedly provided on the side wall of the test box (1) in the vertical direction.

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