Band-type brake control device applied to drop type impact table

Abstract

The band-type brake control device comprises a pulley and an impact table top, a steel wire rope is wound on the pulley, the two ends of the steel wire rope are connected with a lifting block and a proximity switch sensing structure respectively, the lifting block is located in a lifting structure, and the proximity switch sensing structure is located in the lifting structure. The proximity switch sensing structure comprises a sensor mounting seat, a sensor mounting seat fixing plate, a band-type brake lower proximity switch, a buffer spring seat, a hoisting steel wire threaded rod, a spring, a spring limiting ring and a band-type brake lower proximity switch sensing seat, and the lifting structure comprises a hoisting buckle claw, a pull rope displacement sensor and a hoisting block. The band-type brake control device applied to the falling type impact table is formed by combining a plurality of parts, the electromagnetic valve can be accurately controlled through a program and the upper band-type brake and the lower proximity switch, so that opening and closing of the band-type brake piston are controlled, and the whole system automatically completes a set of impact process.

Description

Technical Field

[0001] The present invention relates to the technical field of drop mechanical impact equipment, and particularly to a brake control device applied to a drop impact table. Background Art

[0002] With the development of electronic products towards being thinner, lighter, shorter, and smaller, especially with the increasing speed of product replacement, traditional factors such as heat, electricity, and magnetism are no longer the main factors affecting the reliability of electronic products. During transportation or use, due to accidental drops that generate macroscopic mechanical impact forces on electronic products, failures may occur from the outer shell to the internal circuit solder joints. Therefore, a drop impact table is required for experiments. The drop impact table is mainly used in the field of metrological calibration, especially for the metrology and calibration of objects under the impact of half-sine waves, post-peak sawtooth waves, and trapezoidal waves. Based on its application field, it is required that the drop impact table has the characteristics that the peak lateral movement ratio of the table impact acceleration and the non-uniformity of the peak table impact acceleration reach the standards and are stable.

[0003] Currently, some drop impact tables do not have a brake control component. Therefore, it is impossible to achieve the simultaneous and synchronous rise of both ends of the impact tabletop. Because the pressure losses brought by the oil circuit and the oil cylinder to both sides are different, during the rising process of the lifting oil cylinder under the action of hydraulic oil, the lifting speeds of the lifting blocks on both sides deviate, ultimately resulting in the tilting of the tabletop, jamming or inability to rise during the rising process, reducing the service life of parts or even damaging parts. As the core component of the drop impact table, the quality of the brake control device directly affects the performance of the drop impact table and whether the test purpose can be achieved more efficiently.

[0004] To solve the above problems, this case was thus born. Summary of the Invention

[0005] (1) Technical Problems to be Solved

[0006] In view of the deficiencies of the prior art, the present invention provides a brake control device applied to a drop impact table, which solves the problems raised in the above background art.

[0007] (2) Technical Solutions

[0008] To achieve the above objectives, the present invention is realized through the following technical solutions: A brake control device applied to a drop impact table includes a pulley and an impact tabletop. A steel wire rope is wound around the pulley. The two ends of the steel wire rope are respectively connected to a lifting block and a proximity switch sensing structure. The lifting block is located inside a lifting structure. The proximity switch sensing structure includes a sensor mounting seat, a sensor mounting seat fixing plate, a lower brake proximity switch, a buffer spring seat, a hoisting wire screw rod, a spring, a spring limit ring, and a lower brake proximity switch sensing seat. The lifting structure includes a lifting claw, a rope displacement sensor, and a lifting block.

[0009] Preferably, the pulley is fixed by rotatably connecting a connecting column through a side wall. A proximity switch induction seat for the upper brake is provided on the connecting column. A proximity switch for the upper brake is provided below the proximity switch induction seat for the upper brake. A lifting oil cylinder is provided below the proximity switch for the upper brake of the lower brake. The proximity switch for the upper brake is connected to the lifting oil cylinder.

[0010] Preferably, the lifting structure is arranged on one side of the impact tabletop. The lifting claw is fixedly connected to the lower end faces on both sides of the impact tabletop. One end of the steel wire rope is located inside the rope displacement sensor. A lifting block is provided above the rope displacement sensor.

[0011] Preferably, a lifting wire screw rod and a nut of the lifting wire cross rod are fixedly connected to the steel wire rope. The nut of the lifting wire cross rod is located below the lifting wire screw rod. The bottom end of the nut of the lifting wire cross rod is connected with a proximity switch induction seat for the lower brake through a nut installation.

[0012] Preferably, a spring is wound around the nut of the lifting wire cross rod. The lower end of the spring is located above the proximity switch induction seat for the lower brake. The spring is located inside the sensor fixing plate. A spring limiting ring is provided in the sensor fixing plate. The spring is located inside the spring limiting ring.

[0013] Preferably, a sensor induction seat is fixedly connected to the sensor fixing plate through a nut. A proximity switch for the lower brake is provided on the sensor fixing plate. The proximity switch for the lower brake is fixedly connected through the sensor induction seat. The proximity switch for the lower brake is located directly above the proximity switch induction seat for the lower brake.

[0014] Preferably, a piston is provided inside the lifting oil cylinder. A piston rod is connected to the piston. The proximity switch for the upper brake is slidably connected to the lifting oil cylinder.

[0015] (III) Beneficial Effects

[0016] After adopting the above technical solutions, compared with the prior art, the present invention has the following advantages:

[0017] 1. For a brake control device applied to a drop impact table in the present invention, a proximity switch for the upper brake, a proximity switch for the lower brake, a proximity switch induction seat for the upper brake, and a proximity switch induction seat for the lower brake are provided. By controlling the induction of the proximity switch to the proximity switch induction seat, the position of the solenoid valve spool for controlling the brake is realized, thereby controlling the brake piston.

[0018] 2. A brake control device applied to a drop impact table according to the present invention further sets a spring to provide a force threshold, so as to ensure that during the rising process of the lifting cylinder, under the action of the pulley, the spring is not pulled up, and the lifting block rises until the bottom surface of the lifting claw. Only when the two lifting blocks simultaneously contact the lifting claw, the brake piston will be released to ensure the stable rising of the impact table surface.

[0019] 3. A brake control device applied to a drop impact table according to the present invention, based on the fact that the weight of the impact table surface is very large and it also needs to carry a load. In order to ensure that the steel wire rope will not fall off, thread pressing and set screws are provided on the lifting wire rope screw, the lifting wire rope screw nut and the lifting block to ensure its stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the brake control device of the present invention;

[0021] Figure 2 It is a schematic diagram of the structure of the proximity switch of the present invention;

[0022] Figure 3 It is a side view schematic diagram of the structure of the proximity switch of the present invention;

[0023] Figure 4 It is a schematic diagram of the lifting structure of the present invention;

[0024] Figure 5 It is a side view schematic diagram of the lifting structure of the present invention.

[0025] In the figure: 1. Pulley; 2. Brake upper proximity switch induction seat; 3. Brake upper proximity switch; 4. Lifting cylinder; 5. Steel wire rope; 6. Impact table surface; 7. Lifting claw; 8. Pull rope displacement sensor; 9. Lifting block; 10. Sensor mounting seat; 11. Sensor mounting seat fixing plate; 12. Brake lower proximity switch; 13. Buffer spring seat; 14. Nut; 15. Lifting wire rope rod; 16. Lifting wire rope cross rod nut; 17. Spring; 18. Spring limit ring; 19. Brake lower proximity switch induction seat. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] The present invention will be further described in detail below with reference to the drawings and embodiments.

[0027] Such as Figures 1-5As shown: a brake control device applied to a drop-type impact platform, including a pulley 1 and an impact platform 6, a steel wire rope 5 is wound on the pulley 1, and both ends of the steel wire rope 5 are respectively connected to a lifting block 9 and a proximity switch sensing structure, the lifting block 9 is located in the lifting structure, the proximity switch sensing structure includes a sensor mounting seat 10, a sensor mounting seat fixing plate 11, a brake lower proximity switch 12, a buffer spring seat 13, a lifting wire threaded rod 15, a spring 17, a spring limit ring 18, and a brake lower proximity switch sensing seat 19, the lifting structure includes a lifting claw 7, a pull rope displacement sensor 8, and a lifting block 9. When a lifting signal is input in the program, the oil source starts to supply oil, the piston in the lifting cylinder 4 rises, and the pulley 1 on the piston drives the steel wire rope 5 and the lifting block 9 to rise synchronously. The other end of the steel wire rope 5 has a spring 17, and its elastic force is greater than the gravity of the lifting block 9, so During the rising process of the piston in the lifting cylinder 4, only the lifting block 9 will rise with the piston rod until the upper end surface of the lifting block 9 contacts the lower end surfaces of the lifting claws 7 on both sides of the impact table 6. At this time, since the brake lower proximity switch 12 has not been opened, the impact table 6 is in a clamped state and will not be lifted; since the gravity and clamping force of the impact table 6 are much greater than the elastic force of the spring 17, the spring 17 is compressed, and the lifting wire rope pull rod 15 and the lifting wire rope pull rod nut 16 connected to the wire rope 5 are pulled up, and the brake lower proximity switch sensing seat 19 installed on the lifting wire rope pull rod nut 16 through the nut also rises accordingly, until the upper side of the spring limit ring 18 abuts against the buffer spring seat 13, and the brake lower proximity switch 12 senses the brake lower proximity switch sensing seat 19, and the brake lower proximity switch 12 changes from closed to open, and the same applies to the proximity switch on the other side. When and only when the lower proximity switches 12 of the brakes on both sides are turned on, that is, the lifting blocks 9 on both sides contact the lower end surfaces of the lifting claws 7, the brake switches are turned on, the brake oil circuit is closed, the brake pistons no longer provide clamping pressure, and the impact table 6 starts to rise.

[0028] When the impact table 6 reaches the specified height, the solenoid valve controlling the lifting cylinder 4 releases pressure, and the solenoid valve controlling the brake piston opens, and the impact table 6 is clamped at the specified height. When the impact table 6 is clamped, the solenoid valve controlling the lifting cylinder 4 reverses the oil circuit, and the piston in the lifting cylinder 4 moves downward to the bottom under the action of the hydraulic oil. At this time, when and only when the proximity switches 3 on the brakes on both sides sense the proximity switch sensing seat 2 on the brake, the program will make a judgment. After a short delay, the solenoid valve controlling the brake piston closes, and the impact table 6 falls freely from the specified height.

[0029] This device utilizes the performance of the proximity switch 3 on the brake and the proximity switch 12 under the brake. When the proximity switch sensor base 2 on the brake or the proximity switch sensor base 19 under the brake approaches the range where it can be sensed, the switch will change from normally open to normally closed. Therefore, through this brake control device, the relative positions of the proximity switch sensor base 2 on the brake or the proximity switch sensor base 19 under the brake can be designed under specific circumstances to control the switches of the proximity switch 3 on the brake and the proximity switch 12 under the brake, thereby controlling the start and stop of the brake. And in order to achieve precise control, proximity switches are installed on both the symmetric left and right sides of the drop impact table, thus avoiding the phenomenon of asynchronous rising of the pistons in the lifting cylinder 4 caused by pressure loss in the oil circuit.

[0030] The pulley 1 is fixed by a connecting column rotatably connected to the side wall. A proximity switch sensor base 2 on the brake is provided on the connecting column. A proximity switch 3 on the brake is provided below the proximity switch sensor base 2 on the brake. A lifting cylinder 4 is provided below the proximity switch 3 on the brake. The proximity switch 3 on the brake is connected to the lifting cylinder 4. The lifting cylinder 4 serves as the power device of the entire drop impact table. Through hydraulic action, the piston in the cylinder slowly rises. The pulley 1 and the steel wire rope 5 drive the proximity switch sensor base to control the distance between the proximity switch sensor base and the proximity switch, thereby controlling the proximity switch to achieve the control of the brake device.

[0031] The lifting structure is arranged on one side of the impact table surface 6. The lifting claw 7 is fixedly connected to the lower end surfaces on both sides of the impact table surface 6. One end of the steel wire rope 5 is located inside the rope displacement sensor 8. A lifting block 9 is provided above the rope displacement sensor 8.

[0032] A lifting wire screw rod 15 and a lifting wire cross rod nut 16 are fixedly connected to the steel wire rope 5. The lifting wire cross rod nut 16 is located below the lifting wire screw rod 15. The bottom end of the lifting wire cross rod nut 16 is installed and connected to a proximity switch sensor base 19 under the brake through a nut 7.

[0033] The hoisting wire horizontal pull rod nut 16 is wrapped around by a spring 17. The lower end of the spring 17 is located above the brake lower proximity switch induction seat 19. The spring 17 is located inside the sensor fixing plate 11. A spring limit ring 18 is provided inside the sensor fixing plate 11. The spring 17 is located inside the spring limit ring 18. The spring 17 is used to set a threshold value of the force magnitude. Just because of the threshold value provided by the spring 17, the normal operation of the brake control device can be ensured. In order to enable the pulling force of the steel wire rope 5 to act on the spring 17, first, the steel wire rope 5 needs to be locked to the hoisting wire rope pull rod 15 with screws, and then the steel wire rope is tightly fixed from the inside through the hoisting wire rope pull rod nut 16 to ensure that the steel wire rope will not fall off. Then, the spring 17 is sleeved onto the hoisting wire rope pull rod nut 16. The lower end of the spring is installed and fixed with the spring limit ring 15 in cooperation with an elastic washer and a nut 14. There are also requirements for the selection of the spring. The length of the spring and the k value of the spring should meet the condition that when being pulled by the steel wire rope 5, the brake lower proximity switch induction seat 19 will not enter the induction area of the brake lower proximity switch 12, and at the same time, the lifting block 9 will slowly rise following the pulling of the steel wire rope 5, so as to ensure that the control system will not make mistakes.

[0034] The sensor fixing plate 11 is fixedly connected with a sensor induction seat 10 through a nut. A brake lower proximity switch 12 is provided on the sensor fixing plate 11. The brake lower proximity switch 12 is fixedly connected through the sensor induction seat 10. The brake lower proximity switch 12 is located directly above the brake lower proximity switch induction seat 19.

[0035] A piston is provided inside the lifting oil cylinder 4. A piston rod is connected to the piston. The brake upper proximity switch 3 is slidably connected to the lifting oil cylinder 4. The function of the lifting block 9 is to lift the impact table 6. The rope displacement sensor 8 connected below the lifting block 9 is used to calculate the relative displacement of the lifting block 9 relative to the horizontal plane. The upper part of the lifting block 9 is pulled upward by the steel wire rope 5 until it contacts the lower end surface of the hoisting claw 7, so that the gravity of the steel wire rope 5 on the side of the lifting block 9 is greater than the elastic force of the spring 17, and then the spring is compressed, achieving the purpose of smoothly starting the impact table 6.

[0036] As described above, based on the embodiments as inspiration, through the above description content, relevant staff can completely make various changes and modifications without departing from the idea of this invention. The technical scope of this utility model is not limited to the content in the specification, and its protection scope must be determined according to the scope of the claims.

Claims

1. A brake control device applied to a drop impact table, comprising a pulley (1) and an impact tabletop (6), characterized in that: A steel wire rope (5) is wound around the pulley (1). Both ends of the steel wire rope (5) are respectively connected with a lifting block (9) and a proximity switch induction structure. The lifting block (9) is located inside the lifting structure. The proximity switch induction structure includes a sensor mounting base (10), a sensor mounting base fixing plate (11), a lower brake proximity switch (12), a buffer spring seat (13), a hoisting wire screw rod (15), a spring (17), a spring limit ring (18), and a lower brake proximity switch induction seat (19). The lifting structure includes a lifting claw (7), a rope displacement sensor (8), and a lifting block (9).

2. The brake control device applied to a drop impact table according to claim 1, characterized in that: The pulley (1) is fixed by a connecting column rotatably connected through its side wall. A lower brake proximity switch induction seat (2) is provided on the connecting column. A lower brake proximity switch (3) is provided below the lower brake proximity switch induction seat (2). A lifting cylinder (4) is provided below the lower brake proximity switch (3). The lower brake proximity switch (3) is connected to the lifting cylinder (4).

3. The brake control device applied to a drop impact table according to claim 1, characterized in that: The lifting structure is arranged on one side of the impact table surface (6). The lifting claws (7) are fixedly connected to the lower end surfaces on both sides of the impact table surface (6). One end of the steel wire rope (5) is located inside the rope displacement sensor (8). A lifting block (9) is provided above the rope displacement sensor (8).

4. The brake control device applied to a drop impact table according to claim 1, characterized in that: A hoisting wire screw rod (15) and a hoisting wire cross rod nut (16) are fixedly connected to the steel wire rope (5). The hoisting wire cross rod nut (16) is located below the hoisting wire screw rod (15). The bottom end of the hoisting wire cross rod nut (16) is installed and connected with a lower brake proximity switch induction seat (19) through a nut (7).

5. The brake control device applied to a drop impact table according to claim 4, characterized in that: The hoisting wire cross rod nut (16) is externally wrapped with a spring (17). The lower end of the spring (17) is located above the lower brake proximity switch induction seat (19). The spring (17) is located inside the sensor fixing plate (11). A spring limit ring (18) is provided inside the sensor fixing plate (11). The spring (17) is located inside the spring limit ring (18).

6. The brake control device applied to a drop impact table according to claim 5, characterized in that: The sensor fixing plate (11) is fixedly connected with a sensor induction seat (10) through a nut. A lower brake proximity switch (12) is provided on the sensor fixing plate (11). The lower brake proximity switch (12) is fixedly connected through the sensor induction seat (10). The lower brake proximity switch (12) is located directly above the lower brake proximity switch induction seat (19).

7. The brake control device applied to a drop impact table according to claim 2, characterized in that: A piston is provided inside the lifting cylinder (4). A piston rod is connected to the piston. The lower brake proximity switch (3) is slidably connected to the lifting cylinder (4).

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