Abrasion detection device for brake of hoisting mechanism of portal crane

Abstract

The utility model discloses an abrasion detection device for a brake of a hoisting mechanism of a portal crane, which is characterized in that at least one brake arm of the brake is provided with a spring reset type sensor through a sensor mounting frame, and an arc contact at the top of a telescopic measuring rod of the spring reset type sensor is in contact connection with a sensor panel; the sensor panel is mounted on the multi-adaptive base, and the multi-adaptive base is mounted on a base of the brake through the adjustable mounting plate. An arc contact at the top end of the sensor makes contact with a sensor panel, after the brake shoe is abraded, the feed amount of a telescopic measuring rod of the spring reset type sensor changes, the variable amount is the abrasion loss of the brake shoe, and the real-time performance and reliability of detection are guaranteed through a mechanical structure.

Description

Technical Field

[0001] The utility model belongs to the technical field of crane brakes, and in particular relates to a brake wear detection device for a hoisting mechanism of a gantry crane. Background Art

[0002] The lifting mechanism is an important part of the gantry crane. It can accurately locate and move the cargo. It is composed of multiple key components, such as motors, reducers, drums, brakes, wheels, etc. The brake is an important part of ensuring safety in the operation of the crane. It is similar to the brake system on a car. The brake generates friction between the brake shoe and the brake wheel to slow down the operation of the mechanical equipment. Since the lifting operation of the crane requires frequent starting and braking, the brake shoe will wear quickly. Similar to the brake pad, the brake shoe also has an effective working thickness. When the wear exceeds a certain degree, it will greatly affect the braking effect, making the braking torque smaller and the braking distance longer. The load of the crane is generally large. When the braking effect is reduced, it is a hazard to the safety of people and goods. At the least, it will damage the goods, and at the worst, it will threaten personal safety. The existing brake wear detection device: one is the wear limit, which cannot feedback the wear thickness of the brake shoe in real time, and cannot be used for real-time monitoring and life prediction. The second is electromagnetic and photoelectric limit, which is easily affected by the on-site environment and magnetic field, causing errors and affecting safety. Under the current demand for digitalization of crane equipment monitoring systems, existing products can no longer meet the data collection needs. Therefore, this product is specially designed to fill the gap in the area of ​​real-time and accurate signal detection. Summary of the invention

[0003] In view of the problems in the prior art that the brake shoe wear thickness cannot be fed back in real time, real-time monitoring and life prediction cannot be performed, and the electromagnetic and photoelectric limit switches are easily affected by the on-site environment and magnetic field, causing errors and affecting safety, the utility model provides a brake wear detection device for the hoisting mechanism of a gantry crane which ensures real-time and reliability of detection.

[0004] The purpose of the utility model is achieved in the following way: a brake wear detection device for a gantry crane hoisting mechanism, a sensor mounting frame is welded on at least one brake arm of the brake, a spring-reset sensor is mounted on the sensor mounting frame by bolts, the arc contact at the top of the telescopic measuring rod of the spring-reset sensor contacts and connects the sensor panel, the sensor panel is mounted on a multi-adapter base, and the multi-adapter base is mounted on the base of the brake by an adjustable mounting plate; a positioning hole is provided in the middle of the multi-adapter base, and U-shaped long strip holes are provided at both ends, and bolts are passed through the positioning hole and the U-shaped long strip hole at one end to connect an adjustable mounting plate respectively, and the sensor panel is fixedly connected to the U-shaped long strip hole at the other end of the multi-adapter base by bolts.

[0005] Reinforcing ribs are provided on the back of the sensor panel.

[0006] The sensor mounting frame and sensor panel are both made of a whole piece of stainless steel plate.

[0007] Compared with the prior art, the utility model adopts a spring-reset sensor to measure the wear of the brake shoe, and obtains the wear amount according to the feed amount of the telescopic measuring rod of the spring-reset sensor. The repeatability accuracy can reach 0.01mm, and the wear of the brake shoe can be monitored in real time, which can not only reduce downtime and enable planned advance purchase of replacement equipment, but also timely determine abnormal wear and extend the life of the equipment. The brake wear detection device for the hoisting mechanism of the gantry crane disclosed in the utility model is simple to install, easy to maintain, and inexpensive. Second, because the spring-reset sensor is a mechanical distance measurement, it is not affected by the external environment, the detection is more accurate, and the safety can be greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a structural schematic diagram of a brake in the prior art.

[0009] Figure 2 It is a structural schematic diagram of the utility model.

[0010] Figure 3 It is a schematic diagram of the structure of the utility model.

[0011] Figure 4 Schematic diagram of the structure of the adjustable mounting plate.

[0012] Figure 5 It is a schematic diagram of the structure of the sensor panel.

[0013] Figure 6 It is a structural schematic diagram of a multi-adapter base.

[0014] In the figure, 1-sensor mounting frame, 2-bolt, 3-spring return sensor, 4-adjustable mounting plate, 5-sensor panel, 51-reinforcement rib, 6-multi-adapter base, 61-positioning hole, 62-U-shaped long hole, 10-frame, 20-brake, 21-base, 22-brake arm, 23-brake shoe, 24-bottom cross bar. DETAILED DESCRIPTION

[0015] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention, and are not used to limit the scope of the present invention. After reading the contents of the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the present invention.

[0016] The frame 10 of the gantry crane is fixedly connected to the brake 20 by bolts. The brake 20 includes a base 21 fixedly mounted on the frame 10, a bottom cross bar 24 fixed on the base 21, two brake arms 22 hinged at both ends of the bottom cross bar 24, and brake shoes 23 fixedly arranged on the brake arms. Figure 1 or Figure 2 The structure of the brake is a mature technology in the prior art, and the present utility model will not be described in detail, but only some structures related to the present utility model will be described.

[0017] like Figure 2 , Figure 3 As shown, a sensor mounting frame 1 is welded on at least one brake arm 22 of the brake, a spring reset sensor 3 is connected to the sensor mounting frame 1 through a bolt 2, and an arc contact at the top of the telescopic measuring rod of the spring reset sensor 3 contacts and connects to a sensor panel 5, the sensor panel 5 is mounted on a multi-adaptive base 6, and the multi-adaptive base 6 is mounted on a base 21 of the brake through two adjustable mounting plates 4, and the sensor panel 5, the multi-adaptive base 6 and the base 21 of the brake are relatively stationary; as shown Figure 4 , Figure 5 and Figure 6 As shown, a positioning hole 61 is provided in the middle of the multi-adapter base 6, and U-shaped long holes 62 are provided at both ends. Bolts are passed through the positioning hole 61 and the U-shaped long hole 62 at one end to connect an adjustable mounting plate 4 respectively. The other end of the adjustable mounting plate 4 is connected to the base 21 of the brake, and the sensor panel 5 is fixedly connected to the U-shaped long hole 62 at the other end of the multi-adapter base 6 by bolts.

[0018] When the brake shoe 23 of the brake is worn, the feed amount of the telescopic measuring rod of the spring-reset sensor 3 will change accordingly, and the feed amount change value of the telescopic measuring rod of the spring-reset sensor 3 is the wear amount of the brake shoe 23 of the brake.

[0019] The brake shoes 23 of the outer block brake are used in pairs, and the wear conditions of the two brake shoes 23 are not completely the same. Therefore, it is best to set a set of wear detection devices on each of the two brake arms.

[0020] The sensor mounting frame 1 is formed by bending a whole piece of stainless steel plate. The sensor mounting frame 1 is bent into a U-shape, and the bending increases rigidity and stability. Since the spring reset sensor 3 itself has adjustable size, the bolt hole on the sensor mounting frame 1 can be a circular positioning bolt hole. The spring reset sensor 3 and the sensor mounting frame 1 are mostly connected by bolts, which is simple to install and has strong adaptability.

[0021] A waist-shaped hole 41 is processed on one end of the adjustable mounting plate 4, and a circular positioning bolt hole 42 is formed on the other end. One end of the adjustable mounting plate 4 is connected to the multi-adapter base 6 by bolts passing through the circular positioning bolt hole 42, and the other end is fixedly connected to the base 21 of the brake by bolts passing through the waist-shaped hole 41. Such a design is sufficient to match the sizes of the mounting bolts of different types of brakes. The design of a waist-shaped hole with one end larger and the other end smaller is sufficient to match the sizes of the mounting bolts of different types of brakes. When used for small-sized brakes, a small round hole is used. As the size of the brake increases, the connection hole increases accordingly.

[0022] The sensor panel 5 is also formed by bending a whole piece of stainless steel plate, with a smooth surface to improve accuracy, and is bent into an L-shape, and the short side of the L-shape is bolted to the multi-adapter base 6. Furthermore, a reinforcing rib 51 is provided on the back of the sensor panel 5, and the bending structure and the reinforcing rib 51 on the back increase rigidity and stability, so that the trolley can maintain balance when running.

[0023] The multi-adaptation base 6 is also made of a whole piece of stainless steel plate bent into an L shape. The multi-adaptation base 6 is installed on the frame 10 through two adjustable mounting plates 4, one of which is fixedly connected to the positioning hole 61 on the multi-adaptation base 6 by bolts, and the other adjustable mounting plate 4 is fixedly connected to the U-shaped long hole 62 at one end of the multi-adaptation base 6 by bolts. Since the U-shaped long hole 62 has an adjustable amount, it can adapt to a variety of brake sizes. Furthermore, the positioning hole 61 on the multi-adaptation base 6 and the U-shaped long holes 62 at both ends are two side by side, which can make the connection more secure. The multi-adaptation base 6 is connected to the base 21 of the brake by bolts to avoid welding, and the installation is simple and the maintenance is convenient.

[0024] The connection between the multi-adapter base 6 and the sensor panel 5 is also a bolt connection, and the connecting hole is a U-shaped long hole with an adjustable amount. The U-shaped long hole can adapt to different types of brakes and adjust the position of the sensor panel 5 so that the arc contact at the top of the telescopic measuring rod of the spring reset sensor 3 always contacts the sensor panel 5, making the detection more accurate.

[0025] The utility model adopts a spring reset sensor to measure the wear of the brake shoe, and obtains the wear amount according to the feed amount of the telescopic measuring rod of the spring reset sensor. The repeatability accuracy can reach 0.01mm, and the wear of the brake shoe can be monitored in real time, which can not only reduce downtime and enable planned advance purchase of replacement equipment, but also timely determine the abnormal wear phenomenon and extend the life of the equipment. The utility model is simple to install, easy to maintain and inexpensive. Second, because the spring reset sensor is a mechanical distance measurement, it is not affected by the external environment, the detection is more accurate, and the safety can be greatly improved.

[0026] The above is only a preferred embodiment of the present invention. It should be pointed out that, for those skilled in the art, several changes and improvements can be made without departing from the overall concept of the present invention, and these should also be regarded as the protection scope of the present invention.

Claims

1. A brake wear detection device for a gantry crane hoisting mechanism, characterized in that: A sensor mounting frame (1) is welded on at least one brake arm (22) of the brake, a spring reset sensor (3) is mounted on the sensor mounting frame (1) via bolts (2), an arc contact at the top of the telescopic measuring rod of the spring reset sensor (3) contacts and connects to a sensor panel (5), the sensor panel (5) is mounted on a multi-adaptive base (6), and the multi-adaptive base (6) is mounted on a base (21) of the brake via two adjustable mounting plates (4); a positioning hole (61) is provided in the middle of the multi-adaptive base (6), and U-shaped long strip holes (62) are provided at both ends, bolts are passed through the positioning hole (61) and the U-shaped long strip hole (62) at one end to respectively connect an adjustable mounting plate (4), and the sensor panel (5) is fixedly connected to the U-shaped long strip hole (62) at the other end of the multi-adaptive base (6) via bolts.

2. The brake wear detection device for the hoisting mechanism of a gantry crane according to claim 1 is characterized in that: A reinforcing rib (51) is provided on the back of the sensor panel (5).

3. The brake wear detection device for the hoisting mechanism of a gantry crane according to claim 1 is characterized in that: The sensor mounting frame (1), the sensor panel (5), and the multi-adapter base (6) are all formed by bending a whole piece of stainless steel plate.

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