Emergency braking structure for hydraulic travel case

Abstract

The utility model relates to an emergency brake structure of hydraulic walking case, including the casing of hydraulic walking case, piston, the casing is close to the outside of one side of piston and is provided with the stroke block, be provided with bolt on the stroke block, the bolt passes through stroke block, casing in proper order and is connected with the threaded hole screw thread that sets up the outside of piston later. The utility model has the advantages of reasonable in design, simple structure, convenient to use, when the hydraulic system cannot provide oil liquid and drive piston reset to remove the braking state, through locking bolt, stroke block to pull piston reset, thereby unlocking the braking state, effectively handle the emergency state that the excavator cannot move.

Description

Technical Field

[0001] This utility model relates to an emergency braking structure for a hydraulic travel box. Background Technology

[0002] Wheeled excavators are hydraulically powered engineering machines used in earthmoving, construction, and other applications. The wet brake of the hydraulic travel box (transfer box) is a crucial component. When the hydraulic travel box is in parking braking mode, the piston moves due to the force of a disc spring. The piston drives a pressure plate to press the friction plate assembly, stopping the gear set and power input shaft from rotating. When the brake is released, hydraulic fluid is supplied to the hydraulic inlet, causing the piston and pressure plate to reset, separating the fixed and movable friction plates of the friction plate assembly and restoring their relative rotation. At this point, the disc spring compresses, and the gear set and power input shaft resume rotation. In existing technology, if the hydraulic system loses power (i.e., the hydraulic fluid cannot be controlled), there is no fluid input to press the piston and pressure plate to reset, causing the friction plate assembly to remain pressed, preventing the excavator from moving and making operation impossible in emergencies. Utility Model Content

[0003] This utility model improves upon the above-mentioned problems. Specifically, the technical problem to be solved by this utility model is to provide an emergency braking structure for a hydraulic walking box, which is easy to operate and can release the brake in an emergency.

[0004] This utility model is constructed as follows: it includes a housing of a hydraulic travel box and a piston. A stroke block is provided on the outer side of the housing near the piston. A bolt is provided on the stroke block. The bolt passes through the stroke block and the housing in sequence and is threadedly connected to a threaded hole provided on the outer side of the piston.

[0005] Furthermore, one side of the travel block is a flat surface, and the other side is provided with a groove.

[0006] Furthermore, through holes are provided in the middle of the stroke block and at the end of the housing near the stroke block, and the through holes are slidably fitted with bolts.

[0007] Furthermore, the bolt is an external hexagonal bolt.

[0008] Furthermore, the hydraulic travel box also includes a power input shaft, a disc spring, a pressure plate, a friction plate assembly, a connecting sleeve, a gear seat, and a gear ring, all housed within the housing. The disc spring is positioned between the inner wall of the housing and the piston. The piston is fixedly connected to the pressure plate. The power input shaft is connected to the gear seat via the connecting sleeve. The friction plate assembly includes multiple movable friction plates and multiple fixed friction plates. The movable and fixed friction plates are spaced apart and staggered. The movable friction plates are fixed to the gear seat, and the fixed friction plates are fixed to the gear ring.

[0009] Furthermore, an oil inlet channel is provided on the upper side of the pressure plate.

[0010] Compared with the prior art, the present invention has the following advantages: The device has a simple structure, reasonable design, and is easy to use. In an emergency, due to the elastic action of the disc spring, the piston drives the pressure plate to keep the friction plate assembly in a pressed state. In the case of hydraulic system failure, there is no oil input to drive the piston to move to the left to release the brake. At this time, it is only necessary to loosen the bolt on the stroke block, turn the concave surface of the stroke block inward, and lock the bolt and piston. With the threaded engagement between the bolt and the piston, the piston can be pulled away from the pressure plate and limited to the leftmost position. At this time, the stroke block is firmly pressed against the outside of the housing, the disc spring is compressed, the friction plate assembly is unlocked, and the braking state is unlocked. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model; Figure 2 This is a partial structural diagram of an embodiment of the present utility model; Detailed Implementation

[0012] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0013] Example: Figure 1-2 As shown, an emergency braking structure for a hydraulic travel box is provided, including a housing 101 and a piston 102 of the hydraulic travel box 100. A stroke block 200 is provided on the outer side of the housing near the piston. A bolt 300 is provided on the stroke block. The bolt passes through the stroke block and the housing in sequence and is threadedly connected to a threaded hole provided on the outer side of the piston.

[0014] In an emergency, the piston drives the pressure plate under the elastic action of the disc spring, keeping the friction pad assembly in a pressed state. At this time, simply loosen the bolt on the stroke block, turn the concave surface of the stroke block inward, and lock the bolt with the piston. With the threaded engagement between the bolt and the piston, the piston can be moved away from the pressure plate and limited to the leftmost position. The stroke block is firmly pressed against the outside of the housing, compressing the disc spring, unlocking the friction pad assembly, and unlocking the braking state.

[0015] It is worth noting that the transfer case assembly is in the braking state at the factory. To facilitate the assembly of other components of the hydraulic travel case, the concave side of the travel block is installed facing outwards. Then, the bolts are passed through the threaded holes of the travel block, housing, and piston. At this time, the disc spring is in a free state, and the hydraulic fluid can normally push the piston to move left and right. During this process, the travel block is also connected to the piston, and the bolts can also move left and right normally with the piston.

[0016] In this embodiment of the utility model, one side of the stroke block is a plane, and the other side is provided with a groove 201. The side with the groove is the concave surface; the concave surface also serves as a protective function when the stroke block is installed with the concave surface facing inward.

[0017] In this embodiment of the utility model, through holes are provided in the middle of the stroke block and at the end of the housing near the stroke block, and the through holes are slidably fitted with bolts.

[0018] In this embodiment of the utility model, the bolt is an external hexagonal bolt.

[0019] In this embodiment of the utility model, the hydraulic travel box 100 further includes a power input shaft 103, a butterfly spring 104, a pressure plate 105, a friction plate assembly 106, a connecting sleeve 107, a gear seat 108, and a gear ring 109 disposed within the housing. The butterfly spring is disposed between the inner wall of the housing and the piston. The piston is fixedly connected to the pressure plate. The power input shaft is connected to the gear seat via the connecting sleeve 107. The friction plate assembly is a prior art technology, and the friction plate assembly includes multiple movable friction plates 110 and multiple fixed friction plates 111. The movable friction plates are alloy plates, and the fixed friction plates are steel plates. There is a gap between the movable friction plates and the fixed friction plates. The movable friction plates are fixed to the gear seat, and the fixed friction plates are fixed to the gear ring.

[0020] The output shaft 112 of the hydraulic travel box is connected to the front axle and the rear axle respectively. The power input shaft and the output shaft are connected by existing transmission components, such as gear sets.

[0021] The upper side of the pressure plate is provided with an oil inlet passage 113, which is used to push the piston with oil from the hydraulic system through the oil inlet passage.

[0022] Unless otherwise stated, if any of the technical solutions disclosed in this utility model discloses a numerical range, then the disclosed numerical range is a preferred numerical range. Any person skilled in the art should understand that the preferred numerical range is merely one among many feasible numerical values ​​that has a more obvious or representative technical effect. Because there are many numerical values, it is impossible to list them all. Therefore, this utility model discloses only some numerical values ​​to illustrate the technical solutions of this utility model. Furthermore, the numerical values ​​listed above should not constitute a limitation on the scope of protection of this utility model.

[0023] If the terms "first" or "second" are used in this document to specify components, those skilled in the art should know that the use of "first" or "second" is merely for the purpose of distinguishing components in description, and unless otherwise stated, the above terms have no special meaning.

[0024] Meanwhile, if the present invention discloses or relates to mutually fixedly connected parts or structural components, then unless otherwise stated, the fixed connection can be understood as: a detachable fixed connection (e.g., using bolts or screws), or a non-detachable fixed connection (e.g., riveting, welding). Of course, the mutually fixed connection can also be replaced by an integral structure (e.g., manufactured by casting process) (except where it is obviously impossible to use an integral forming process).

[0025] In addition, unless otherwise stated, the terms used to indicate positional relationships or shapes in any of the technical solutions disclosed in this utility model above include states or shapes that are similar to, close to, or approximate with them.

[0026] Any component provided by this utility model can be assembled from multiple individual components, or it can be a single component manufactured by a one-piece molding process.

[0027] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it; although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this utility model or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the technical solution claimed by this utility model.

Claims

1. An emergency braking structure for a hydraulic travel box, comprising a housing of the hydraulic travel box and a piston, characterized in that, A stroke block is provided on the outer side of the housing near the piston. A bolt is provided on the stroke block. The bolt passes through the stroke block and the housing in sequence and is threadedly connected to a threaded hole provided on the outside of the piston.

2. The emergency braking structure of a hydraulic travel box according to claim 1, characterized in that, One side of the travel block is a flat surface, and the other side has a groove.

3. The emergency braking structure of a hydraulic travel box according to claim 1, characterized in that, Through holes are provided in the middle of the stroke block and at the end of the housing near the stroke block, and the through holes are slidably fitted with bolts.

4. The emergency braking structure of a hydraulic travel box according to claim 1, characterized in that, The bolt is an external hexagonal bolt.

5. The emergency braking structure of a hydraulic travel box according to claim 1, characterized in that, The hydraulic travel box also includes a power input shaft, a disc spring, a pressure plate, a friction plate assembly, a connecting sleeve, a gear seat, and a gear ring, all housed within the housing. The disc spring is positioned between the inner wall of the housing and the piston. The piston is fixedly connected to the pressure plate. The power input shaft is connected to the gear seat via the connecting sleeve. The friction plate assembly includes multiple movable friction plates and multiple fixed friction plates. The movable and fixed friction plates are spaced apart and staggered. The movable friction plates are fixed to the gear seat, and the fixed friction plates are fixed to the gear ring.

6. The emergency braking structure of a hydraulic travel box according to claim 5, characterized in that, An oil inlet channel is provided on the upper side of the pressure plate.

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