Automatic parking device after power failure of excavator

Abstract

The utility model provides an automatic parking device after power loss of an excavator, which comprises a clamp body, a piston component is arranged on the clamp body, and a hydraulic active driving and spring passive energy storage composite structure is adopted; a hollow part is arranged on the caliper body, a first brake pad and a second brake pad are placed in the hollow part, the first brake pad is arranged close to the piston assembly and pushed by the piston assembly, a screw hole is formed in the side, away from the first brake pad, of the second brake pad of the caliper body, and an adjusting bolt matched with the screw hole in a threaded mode is arranged in the screw hole in a penetrating mode; the adjusting bolt comprises an abutting portion and a threaded portion, the diameter of the abutting portion is larger than that of the threaded portion, and a first magnet is embedded in the end face, close to the second brake pad, of the abutting portion. According to the parking device, the safety, the maintenance convenience, the reliability and the service life cost are improved in a multi-dimensional mode.

Description

Technical Field

[0001] This utility model relates to the field of engineering machinery braking technology, specifically to an automatic parking device for an excavator after power failure. Background Technology

[0002] The automatic parking device after power failure of an excavator usually refers to the manual brake installed on the excavator, or simply the handbrake. In the field of construction machinery, the parking safety of excavators is of paramount importance. It is used to stabilize the vehicle after the excavator has come to a stop, and to prevent accidents caused by the excavator rolling away when parking on a slope. The operating conditions of excavators are relatively complex, with varied terrain and uneven roads.

[0003] In existing technologies, traditional parking devices typically employ a piston assembly to push a brake pad tightly against another brake pad, which, in conjunction with a second brake pad, clamps the brake pad to achieve a parking effect. After prolonged use and slight wear, the initial position of one brake pad can be finely adjusted by rotating the pivot shaft in the piston assembly, ensuring that it can still clamp the brake pad in the parking state, thus extending its service life. However, the position of the other brake pad is usually not adjustable, and after long-term use, a certain difference in clamping force will occur between the two sides, affecting the braking effect.

[0004] Therefore, there is an urgent need for a new type of parking device that combines fail-safe operation, convenient adjustment, and high reliability. Utility Model Content

[0005] This invention provides an automatic parking device for excavators after power failure, which can effectively solve the above-mentioned problems.

[0006] This utility model is implemented as follows:

[0007] An automatic parking device for an excavator after power failure includes a clamp body, on which a piston assembly is provided, and adopts a composite structure of hydraulic active drive and spring passive energy storage;

[0008] The clamp body has a hollowed-out section, in which a first brake pad and a second brake pad are placed. The first brake pad is positioned close to the piston assembly and is pushed by it. The clamp body has a screw hole on the side of the second brake pad away from the first brake pad, and a threaded adjusting bolt passes through the screw hole.

[0009] The adjusting bolt includes an abutting portion and a threaded portion. The diameter of the abutting portion is larger than the diameter of the threaded portion. A first magnet is embedded in the abutting portion near the end face of the second brake pad.

[0010] As a further improvement, the diameter of the threaded portion is greater than 20 mm, and a coarse thread is used.

[0011] As a further improvement, the threaded portion has an adjustment portion with a hexagonal cross-section at the end away from the abutting portion, and a marking hole is provided on the side of the adjustment portion.

[0012] As a further improvement, the piston assembly includes an end cap, a piston, a rotating shaft, a top bolt, and a disc spring. The end cap and the clamp body are combined to form a cavity. The piston is disposed in the cavity. The rotating shaft and the top bolt are disposed in the piston, and the rotating shaft is threadedly connected to the piston. A second magnet is embedded in the end of the top bolt near the first brake pad.

[0013] As a further improvement, a limiting pin is provided at the top of the hollowed-out part to prevent the brake pad from falling out. The top of the clamp body also includes a groove, in which a nut that cooperates with the limiting pin is provided.

[0014] As a further improvement, the second brake pad includes a friction portion, wherein the axis of the threaded portion is perpendicular to the friction portion.

[0015] As a further improvement, two fixing bolts are provided on both sides of the clamp body.

[0016] The beneficial effects of this utility model are:

[0017] An adjusting bolt with a magnet is added to the outside of the second brake pad. By rotating the adjusting bolt, the pitch can be controlled, and the initial position of the second brake pad can be adjusted independently. This allows both brake pads to be adjusted synchronously to approach the brake disc, avoiding uneven force on both sides due to long-term wear, which affects the braking effect. It can also extend the service life and reduce maintenance costs. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a structural schematic diagram provided by an embodiment of the present utility model.

[0020] Figure 2 This is a front view provided in an embodiment of the present utility model.

[0021] Figure 3 This is a cross-sectional view at point AA provided in an embodiment of this utility model.

[0022] Figure label:

[0023] 1. Clamp body; 11. Hollowed-out part; 12. Groove; 2. First brake pad; 3. Second brake pad; 31. Friction part; 4. Adjusting bolt; 41. Abutting part; 42. Threaded part; 43. Adjusting part; 5. Limiting pin; 6. Fixing bolt; 71. End cap; 72. Piston; 73. Rotating shaft; 74. Top bolt; 75. Butterfly spring; 8. First magnet; 9. Second magnet. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely to represent selected embodiments of this utility model.

[0025] In the description of this utility model, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0026] Reference Figure 1-3 As shown, an automatic parking device for an excavator after power failure includes a clamp body 1, which is fixed to the gearbox. The clamp body 1 is equipped with a piston 72 assembly and adopts a composite structure of hydraulic active drive and spring passive energy storage.

[0027] The clamp body 1 is provided with a hollow part 11, in which a first brake pad 2 and a second brake pad 3 are placed. After the parking device is installed, the brake disc is located between the first brake pad 2 and the second brake pad 3. The first brake pad 2 is located close to the piston 72 assembly and is pushed by it. The clamp body 1 is provided with a screw hole on the side of the second brake pad 3 away from the first brake pad 2. A threaded adjusting bolt 4 is inserted into the screw hole.

[0028] The adjusting bolt 4 includes an abutment portion 41 and a threaded portion 42. The diameter of the abutment portion 41 is larger than the diameter of the threaded portion 42. A first magnet 8 is embedded in the abutment portion 41 near the end face of the second brake pad 3. By adjusting the position of the adjusting bolt 4, the second brake pad 3 is moved closer to or away from the brake disc. By rotating the adjusting bolt 4, the pitch is controllable, and the initial position of the second brake pad 3 can be adjusted independently. This allows the brake pads on both sides to be adjusted synchronously to approach the brake disc, avoiding uneven force on both sides due to long-term wear, which affects the braking effect. If only the position of the first brake pad 2 is adjusted on one side, each adjustment can only bring the first brake pad 2 closer to the brake disc, while the distance between the first brake pad 2 and the second brake pad 3 will continue to increase, and the overall braking force will decrease when the piston 72 assembly is working.

[0029] When the oil is injected, the piston 72 is driven to move outward, causing the first brake pad 2 to separate from the brake disc. At this time, the spring in the piston 72 assembly stores force. When the excavator is powered off or the handbrake is pulled up, the oil stops actively being injected, and the spring returns to its original position, causing the first brake pad 2 to press against the brake disc.

[0030] Specifically, the diameter of the threaded part 42 is greater than 20mm, and a coarse thread (pitch 2.5mm) is used. Usually, the maximum axial tensile strength of a screw mainly depends on the cross-sectional area at the minor diameter of its thread. In order to ensure that its structure can meet the strength requirements and has a high degree of redundancy to ensure its safety.

[0031] Specifically, the threaded part 42 has an adjustment part 43 with a hexagonal cross section at the end away from the abutment part 41, which is convenient for adjustment by wrench. The adjustment part 43 has a marking hole on the side, which is convenient for judging the angle of the adjustment bolt 4 by observing the position of the marking hole, judging whether the second brake pad 3 has reached the maximum adjustable range, and replacing the brake pad in time.

[0032] Specifically, the piston 72 assembly includes an end cap 71, a piston 72, a rotating shaft 73, a top bolt 74, and a disc spring 75. The end cap 71 and the clamp body 1 are combined to form a cavity. The piston 72 is located in the cavity. The rotating shaft 73 and the top bolt 74 are located inside the piston 72, and the rotating shaft 73 is threadedly connected to the piston 72. The top bolt 74 has a second magnet 9 embedded at the end near the first brake pad 2. By simply rotating the rotating shaft 73, the top bolt 74 can move the first brake pad 2 closer to the second brake pad 3, thus allowing for fine adjustment of the position of the first brake pad 2.

[0033] Specifically, a limiting pin 5 is provided at the top of the hollow part 11 to prevent the brake pad from falling out. The top of the caliper body 1 also includes a groove 12, in which a nut that cooperates with the limiting pin 5 is provided.

[0034] Specifically, the second brake pad 3 includes a friction part 31. The contact between the second brake pad 3 and the brake disc is mainly through the friction part 31. In order to make the force more reasonable and avoid the friction part 31 from tilting and wearing, the axis of the threaded part 42 is perpendicular to the friction part 31.

[0035] Specifically, the clamp body 1 has two fixing bolts 6 on both sides for fixing the clamp body 1 to the gearbox. The fixing bolt 6 has a washer and a washer at the end away from the nut. The washer is in contact with the clamp body 1 and is made of rubber, so that the clamp body 1 can move when clamped.

[0036] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An automatic parking device for an excavator after power failure, comprising a clamp body (1), wherein a piston (72) assembly is provided on the clamp body (1), and a composite structure of hydraulic active drive and spring passive energy storage is adopted, characterized in that: The clamp body (1) is provided with a hollow part (11), in which a first brake pad (2) and a second brake pad (3) are placed. The first brake pad (2) is located close to the piston (72) assembly and is pushed by it. The clamp body (1) is provided with a screw hole on the side of the second brake pad (3) away from the first brake pad (2). A threaded adjusting bolt (4) is inserted in the screw hole. The adjusting bolt (4) includes an abutting part (41) and a threaded part (42). The diameter of the abutting part (41) is larger than the diameter of the threaded part (42). The abutting part (41) has a first magnet (8) embedded in its end face near the second brake pad (3).

2. The automatic parking device for an excavator after power failure according to claim 1, characterized in that, The threaded portion (42) has a diameter greater than 20 mm and uses coarse threads.

3. The automatic parking device for an excavator after power failure according to claim 1, characterized in that, The threaded portion (42) has an adjustment portion (43) with a hexagonal cross section at the end away from the abutting portion (41), and a marking hole is provided on the side of the adjustment portion (43).

4. The automatic parking device for an excavator after power failure according to claim 2, characterized in that, The piston (72) assembly includes an end cap (71), a piston (72), a rotating shaft (73), a top bolt (74), and a butterfly spring (75). The end cap (71) and the clamp body (1) are combined to form a cavity. The piston (72) is disposed in the cavity. The rotating shaft (73) and the top bolt (74) are disposed in the piston (72). The rotating shaft (73) is threadedly connected to the piston (72). A second magnet (9) is embedded at the end of the top bolt (74) near the first brake pad (2).

5. The automatic parking device for an excavator after power failure according to claim 1, characterized in that, A limiting pin (5) is also provided at the top of the hollow part (11) to prevent the brake pad from falling out. The top of the clamp body (1) also includes a groove (12), and a nut that cooperates with the limiting pin (5) is provided in the groove (12).

6. The automatic parking device for an excavator after power failure according to claim 2, characterized in that, The second brake pad (3) includes a friction portion (31), and the axis of the threaded portion (42) is perpendicular to the friction portion (31).

7. The automatic parking device for an excavator after power failure according to claim 1, characterized in that, The clamp body (1) is provided with two fixing bolts (6) on both sides.

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