Novel belt type automatic braking device

Abstract

The utility model belongs to the technical field of brakes, and particularly relates to a novel belt type automatic braking device which is arranged at one end of a winding drum of lifting or traction type winch equipment, and comprises a circular braking belt and an arch-shaped connecting body, and a braking positioning groove is formed in the arch-shaped connecting body. At the tail end of the braking process, the braking positioning groove is tightly attached to the first rotating arm, and the arch-shaped connecting body forms self-locking; the rotating arm I is mounted at one end of the transmission shaft; the second rotating arm is mounted at the other end of the transmission shaft; the second pin shaft is hinged with the second pull rod; and the normally closed brake cylinder is connected with the pull rod II through an adjusting nut II. The brake device is installed on the winch equipment, has the advantages of being simple in structure, low in cost, large in brake torque, high in brake response speed, good in self-locking performance and the like, can meet the requirement of lifting operation equipment for brake safety to the maximum extent, and improves applicability and safety of the equipment.

Description

Technical Field

[0001] This utility model belongs to the field of brake technology, specifically relating to a novel belt-type automatic braking device. Background Technology

[0002] Various types of winches with lifting or traction functions are used in many areas of our production and daily life. In actual operation, these devices often require high braking capacity, fast braking response speed, and the ability to lock the load after braking.

[0003] Common band-type automatic (pneumatic) braking devices, due to the need for increased braking force, often use a very long swing arm connected to the brake cylinder. A long swing arm typically requires a long-stroke cylinder; otherwise, the brake drum and brake band may fail to disengage during brake release. This accelerates brake band wear, reducing its lifespan, and also causes power loss, impacting product economics. Therefore, a long swing arm with a long-stroke cylinder is usually the standard configuration for existing band-type automatic braking devices. This configuration often requires significant installation space, inevitably affecting the installation of other components.

[0004] The existing standard configuration of long boom with long stroke cylinder has two main drawbacks: First, the longer the boom, the slower the braking response, which affects the safety of the equipment; second, it cannot self-lock during the braking holding phase, and the braking holding relies entirely on the spring force of the brake cylinder itself; at the same time, the manufacturing cost of the extended boom and the extended stroke brake cylinder will also increase accordingly.

[0005] Therefore, designing and developing a low-cost, high-capacity, fast-response, and self-locking belt automatic braking device is of great significance to users of hoisting or traction winch equipment. Utility Model Content

[0006] This invention provides a novel belt-type automatic braking device. The optimized and improved braking device significantly shortens the arm length, improving braking response speed. The use of an arc-shaped connector ensures that the entire braking process remains near the "dead point" of the brake band. Especially at the end of the braking process, as the arc-shaped connector gradually approaches the arm, the output torque of the brake cylinder is rapidly amplified until the brake positioning groove on the arc-shaped connector is tightly against the connected arm. At this point, the brake band is precisely at the preset "dead point" position of the braking device itself, and the brake cylinder only needs to provide a small force to maintain the load on the drum. The optimized and improved braking device has a significantly reduced size, a significantly increased braking torque, and a significantly faster braking response speed. The device itself has a self-locking function, making the braking process more effortless.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A novel belt-type automatic braking device includes:

[0009] A circular brake band, one end of which is hinged to a brake band fixing seat, and the other end is hinged to a pull rod via a pin.

[0010] The bow-shaped connector has one end connected to the pull rod via an adjusting nut, and the other end connected to the rotating arm via a pin hinge. The bow-shaped connector is provided with a brake positioning groove. At the end of the braking process, the brake positioning groove is in close contact with the rotating arm, and the bow-shaped connector forms a self-locking mechanism.

[0011] One rotating arm is installed at one end of the drive shaft;

[0012] The second rotating arm is installed at the other end of the drive shaft; it is hinged to the second tie rod via the second pin.

[0013] The normally closed brake cylinder is connected to the tie rod via adjusting nut two.

[0014] Furthermore, the internal threads at both ends of the adjusting nut are a right-hand thread and a left-hand thread, respectively. One end of the right-hand internal thread is connected to the right-hand external thread on the pull rod, and the other end of the left-hand internal thread is connected to the left-hand external thread on the bow-shaped connecting body.

[0015] Furthermore, the rotating arm is connected to the drive shaft by a flat key.

[0016] Furthermore, the second rotating arm is connected to the drive shaft by an involute spline.

[0017] Furthermore, the second adjusting nut has the same structure as the first adjusting nut.

[0018] Furthermore, the air inlet of the normally closed brake cylinder is connected to the output end of the rapid exhaust valve, the air inlet of the rapid exhaust valve is connected to the exhaust port of the shuttle valve, and the control ports on both sides of the shuttle valve are respectively connected to the lifting side and lowering side control ports of the equipment control valve.

[0019] The beneficial effects of this utility model are as follows:

[0020] (1) The braking device has a significantly reduced size, making it more convenient to use and install, and more adaptable;

[0021] (2) The circular brake band and the fixed seat are connected by a hinge. When braking, it can ensure a large enough wrap angle. When not braking, the brake band can smoothly detach from the brake drum, avoiding half-clutching to reduce wear and extend its service life.

[0022] (3) The design of the bow-shaped connecting body can effectively increase the braking torque of the braking device at the end of the braking process, while also effectively locking the load; the large braking torque can achieve self-locking.

[0023] (4) The design of the positive and negative threads of the adjusting nut facilitates the adjustment of the output torque of the brake cylinder; the involute spline connection between the cylinder side rotating arm and the drive shaft facilitates the adjustment of the mating angle between the two rotating arms.

[0024] (5) By shortening the swing arm and adding a fast exhaust valve to the cylinder, the braking response speed of the braking device is further improved. Attached Figure Description

[0025] Figure 1 This is a side view of the device of this utility model;

[0026] Figure 2 This is a front view of the device of this utility model;

[0027] Figure 3 This is a schematic diagram of the overall structure of the device of this utility model;

[0028] Figure 4 This is a schematic diagram of the self-locking state of the device of this utility model.

[0029] In the diagram: 1. Circular brake band; 2. Pin 1; 3. Cotter pin 1; 4. Pull rod 1; 5. Locking nut; 6. Spring washer 1; 7. Fixing bolt; 8. Washer; 9. Adjusting nut 1; 10. Bow-shaped connector; 11. Cotter pin 2; 12. Pin 2; 13. Flat key; 14. Swing arm 1; 15. Drive shaft; 16. Support ear; 17. Swing arm 2; 18. Pad; 19. Spring washer 2; 20. Bolt; 21. Cotter pin 3; 22. Pin 3; 23. Pull rod 2; 24. Adjusting nut 2; 25. Normally closed brake cylinder; 26. Cylinder mounting seat; 27. Intake pipe; 28. Quick exhaust valve; 29. ​​Drum brake drum; 30. Brake positioning groove. Detailed Implementation

[0030] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the embodiments will be briefly described below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0031] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. The embodiments cannot be described in detail here, but the embodiments of the present invention are not limited to the following embodiments.

[0032] Example: A novel belt-type automatic braking device, with a structure as described above. Figure 1-4 As shown, it includes:

[0033] A circular brake band 1 is arranged around the outer periphery of the drum brake 29; one end of the circular brake band 1 is hinged to the brake band fixing seat by a fixing bolt 7, and the other end is hinged to the pull rod 4 by a pin 2; both ends of the pin 2 are machined with radial cotter pin holes, and are axially limited by inserting cotter pins 3; a washer 8 is provided between the fixing bolt 7 and the brake band fixing seat; the other end of the pull rod 4 is connected to the bow-shaped connector 10 by an adjusting nut 9.

[0034] The adjusting nut 9 has two ends, one end of which has a right-hand thread (positive) and the other end has a left-hand thread (negative). The right-hand thread of the adjusting nut 9 is connected to the right-hand external thread on the pull rod 4, and the left-hand thread is connected to the left-hand external thread on the bow-shaped connector 10.

[0035] The adjusting nut 9 has a reverse thread design at both ends to ensure clockwise / counterclockwise rotation. The adjusting nut 9 can be used to easily adjust the magnitude of the output braking force of the normally closed brake cylinder 25.

[0036] The locking nut 5 is used to lock the adjusting nut 9; a spring washer 6 is provided between the locking nut 5 and the adjusting nut 9. The spring washer 6 can be one, two, or multiple layers of spring washers.

[0037] The device includes an arc-shaped connector 10, one end of which is connected to a pull rod 4 via an adjusting nut 9, and the other end is hinged to a rotating arm 14 via a pin 12; the pin 12 has radial cotter pin holes machined at both ends, and is axially limited by inserting a cotter pin 11.

[0038] The bow-shaped connector 10 is provided with a brake positioning groove 30. At the end of the braking process, the brake positioning groove 30 is in close contact with the rotating arm 14. At this time, points 1, 2, and 3 will be on the same straight line, and the bow-shaped connector 10 will form a self-locking mechanism. Points 1, 2, and 3 represent the center points of pin 2, bolt 20, and pin 12, respectively.

[0039] The rotating arm 14 is connected to the drive shaft 15 by a flat key 13 and is installed at one end of the drive shaft 15.

[0040] The second rotating arm 17 is installed at the other end of the drive shaft 15 and is connected to the drive shaft 15 by an involute spline to facilitate installation angle adjustment; the outer side of the second rotating arm 17 is provided with a pad 18, a spring washer 19 and a bolt 20 for axial limiting of the second rotating arm 17.

[0041] The drive shaft 15 is hinged to the support lug 16; the support lug 16 is welded or bolted to the base of the winch.

[0042] The second rotating arm 17 is hinged to the second tie rod 23 via the third pin 22; the third pin 22 has radial cotter pin holes machined at both ends, and is axially limited by inserting the cotter pin 21.

[0043] The normally closed brake cylinder 25 is connected to the tie rod 23 via adjusting nut 24.

[0044] The design of the positive and negative internal threads at both ends of the adjusting nut 24 is the same as that of the adjusting nut 9, so that when the adjusting nut 24 is rotated clockwise or counterclockwise, the magnitude of the output braking force of the normally closed brake cylinder 25 can be easily adjusted to increase or decrease.

[0045] The device also includes: a normally closed brake cylinder 25, the fixed end of which is welded / bolted to the hoisting equipment base via a cylinder mounting seat 26; the air inlet of the normally closed brake cylinder 25 is connected to the output end of a quick exhaust valve 28, the air inlet of the quick exhaust valve 28 is connected to the exhaust port of a shuttle valve via an air inlet pipe 27, and the control ports on both sides of the shuttle valve are respectively connected to the lifting side and lowering side control ports of the equipment control valve. The equipment control valve must be in the neutral unloading position.

[0046] The working principle of this utility model is as follows:

[0047] When installing the new type of belt-type automatic pneumatic brake device, attention should be paid to the direction of the load on the drum. When the brake device is working, the fixed seat of the circular brake band 1 is subjected to compressive stress, which indicates that the installation direction of the brake device is correct. When the normally closed brake cylinder 25 is in working condition (normally closed) after installation, the first rotating arm 14 and the bow-shaped connecting body 10 can be in close contact. The center line of the two holes on the second rotating arm 17 should be perpendicular to or nearly perpendicular to the cylinder rod axis of the normally closed brake cylinder 25. Loosen the locking nut 5, rotate the adjusting nut 9 to extend the cylinder rod inside the normally closed brake cylinder 25 to a certain length (as needed), and then tighten the locking nut 5. The air inlet of the normally closed brake cylinder 25 is connected to a quick exhaust valve 28. When the control valve (neutral unloading) returns to the "neutral" position, the pressure on the air inlet side of the quick exhaust valve 28 decreases. At this time, the exhaust side of the quick exhaust valve 28 will quickly expel the air inside the normally closed brake cylinder 25. The cylinder rod inside the normally closed brake cylinder 25 will quickly retract under the action of the internal spring force, and finally transmit the force to the circular brake band 1. The circular brake band 1 will quickly grip the drum brake 29 to complete the braking. It should be noted that, under the premise of meeting the output braking force requirements, the length of the cylinder rod extending out of the normally closed brake cylinder 25 should be as short as possible to reduce unnecessary wear on the circular brake band 1 and extend its service life.

[0048] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A novel belt-type automatic braking device, characterized in that, include: A circular brake band (1) is hinged at one end to a brake band fixing seat and at the other end to a pull rod (4) hinged via a pin (12). The bow-shaped connector (10) has one end connected to the pull rod (4) via the adjusting nut (9), and the other end connected to the rotating arm (14) via the pin (12). The bow-shaped connector (10) is provided with a brake positioning groove (30). At the end of the braking process, the brake positioning groove (30) is in close contact with the rotating arm (14), and the bow-shaped connector (10) forms a self-locking mechanism. Rotary arm 1 (14) is installed at one end of the drive shaft (15); Rotary arm two (17) is installed at the other end of the drive shaft (15); it is hinged to tie rod two (23) via pin three (22); The normally closed brake cylinder (25) is connected to the tie rod (23) via adjusting nut two (24).

2. The novel belt-type automatic braking device according to claim 1, characterized in that, The internal threads at both ends of the adjusting nut (9) are right-hand threads and left-hand threads, respectively. One end of the right-hand internal thread is connected to the right-hand external thread on the pull rod (4), and one end of the left-hand internal thread is connected to the left-hand external thread on the bow-shaped connector (10).

3. A novel belt-type automatic braking device according to claim 1, characterized in that, The rotating arm (14) is connected to the drive shaft (15) by a flat key (13).

4. A novel belt-type automatic braking device according to claim 1, characterized in that, The rotating arm (17) and the drive shaft (15) are connected by an involute spline.

5. A novel belt-type automatic braking device according to claim 1, characterized in that, The second adjusting nut (24) has the same structure as the first adjusting nut (9).

6. A novel belt-type automatic braking device according to claim 1, characterized in that, The air inlet of the normally closed brake cylinder (25) is connected to the output end of the quick exhaust valve (28), the air inlet of the quick exhaust valve (28) is connected to the exhaust port of the shuttle valve, and the control ports on both sides of the shuttle valve are connected to the lifting side and lowering side control ports of the equipment control valve, respectively.

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