Drive axle brake structure capable of manually and emergently releasing brake

Abstract

The utility model discloses a drive axle brake structure capable of manually and emergently releasing brake, which comprises an axle housing arm, a half shaft, a brake shell, an end shell and a brake component, and the brake shell is arranged between the axle housing arm and the end shell; the braking assembly comprises a friction plate set, a pressing disc, a disc spring, a piston and a parking thrust disc, the pressing disc is arranged on one side of the friction plate set, the piston and the parking thrust disc are installed in an inner cavity of the braking shell, and the disc spring is arranged between the parking thrust disc and the end shell; first threaded holes are symmetrically formed in one end of the axle housing arm in the radial direction, protruding blocks are symmetrically arranged on the pressing disc in the radial direction, second threaded holes corresponding to the first threaded holes are formed in the protruding blocks, and ejection bolts penetrate through the first threaded holes to be screwed into the corresponding second threaded holes. According to the utility model, when the friction plate group is locked in a parking braking state, the jacking bolt can be operated from the outside to jack the pressing disc, so that the braking is released under the condition of no hydraulic supply, the braking clearance can be measured from the outside under the condition of not detaching the brake, and the debugging of equipment is facilitated.

Description

Technical Field

[0001] The utility model relates to the field of drive axle braking, in particular to a drive axle braking structure capable of manually and emergently releasing braking. Background Technique

[0002] Multi-disc wet brake axles with an automatic parking function are mostly used in construction machinery vehicles. In the design of such axles, a hydraulic system is generally used to control the operation of the brake. Under normal circumstances, the brake is generally in the following states: 1. No-brake state: At this time, the parking hydraulic system is pressurized to keep the vehicle stable, while the driving hydraulic system is in a pressure-relief state and does not produce a braking effect; 2. Parking brake state: In this state, both the parking hydraulic system and the driving hydraulic system are in a pressure-relief state; 3. Driving brake state: When the vehicle is moving, both the parking hydraulic system and the driving hydraulic system are pressurized. In the parking brake state, the friction plate group is locked and the wheels cannot rotate. Although this state can protect the vehicle and prevent situations such as vehicle rollback, once the hydraulic system fails, the vehicle will not be able to move. In addition, the braking gap of the brake cannot be measured outside the axle. If it is necessary to detect the braking gap of the vehicle, the axle needs to be disassembled. Summary of the Invention

[0003] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a drive axle braking structure capable of manually and emergently releasing braking.

[0004] In order to achieve the above purpose, the utility model is realized by the following technical solutions:

[0005] A drive axle braking structure capable of manually and emergently releasing braking, including a bridge shell arm, a half shaft, a brake housing, an end shell and a brake assembly;

[0006] The brake housing is arranged between the bridge shell arm and the end shell;

[0007] The brake assembly includes a friction plate group, a pressing disc, a disc spring, a piston and a parking thrust disc. Among them: the friction plate group includes a plurality of moving friction plates and a plurality of static friction plates. The moving friction plates are connected to the half shaft through a spline sleeve, and the static friction plates are connected to the bridge shell arm through a spline. The moving friction plates and the static friction plates are arranged alternately. A pressing disc is arranged on one side of the friction plate group. The piston and the parking thrust disc are installed in the inner cavity of the brake housing. A disc spring is arranged between the parking thrust disc and the end shell;

[0008] One end of the bridge shell arm is radially symmetrically provided with a first threaded hole. The pressing disc is radially symmetrically provided with a convex block. The convex block is provided with a second threaded hole corresponding to the first threaded hole. A jacking bolt passes through the first threaded hole and is screwed into the corresponding second threaded hole.

[0009] Further, a reinforcing block corresponding to the first threaded hole is installed on the bridge shell arm.

[0010] Further, a locknut is also provided on the jacking bolt.

[0011] Further, the head of the jacking bolt is a conical head, and the bottom of the second threaded hole is conical and matches the conical head.

[0012] Further, after the jacking bolt is screwed into the second threaded hole, 20 - 30 mm of its length is exposed. Beneficial effects

[0013] The utility model can, when the friction plate group is locked in the parking brake state, operate the jacking bolt from the outside to jack up the pressing disc, so as to release the brake without hydraulic supply, and can also measure the brake clearance from the outside without disassembling the brake, which is convenient for equipment debugging. Description of the drawings

[0014] Figure 1 is a schematic structural diagram of a preferred embodiment of the utility model;

[0015] Figure 2 is a front view of a preferred embodiment of the utility model;

[0016] Figure 3 is a cross-sectional view of a preferred embodiment of the utility model;

[0017] Figure 4 is a schematic structural diagram of the pressing disc in a preferred embodiment of the utility model;

[0018] Figure 5 is a cross-sectional view of the pressing disc in a preferred embodiment of the utility model;

[0019] In the figure: axle housing arm 1, jacking bolt 2, friction plate group 3, pressing disc 4, brake housing 5, disc spring 6, locknut 7, piston 8, half shaft 9, parking thrust disc 10, spline sleeve 11, end housing 12, moving friction plate 31, static friction plate 32, convex block 41, second threaded hole 42, strengthening block 101. Specific embodiments

[0020] In order to make the technical means, creative features, achieved purposes and functions of the utility model easy to understand, the utility model will be further described below in conjunction with specific embodiments.

[0021] Embodiment: As Figures 1 to 5As shown in the figure, a drive axle braking structure capable of manual emergency release braking includes a bridge housing arm 1, a half shaft 9, a braking housing 5, an end housing 12, and a braking assembly; the braking housing 5 is arranged between the bridge housing arm 1 and the end housing 12; the braking assembly includes a friction plate group 3, a pressing disc 4, a disc spring 6, a piston 8, and a parking thrust disc 10, where: the friction plate group 3 includes a plurality of moving friction plates 31 and a plurality of static friction plates 32, the moving friction plates 31 are connected to the half shaft 9 through a spline sleeve 11, the static friction plates 32 are connected to the bridge housing arm 1 through a spline, the moving friction plates 31 and the static friction plates 32 are arranged alternately, a pressing disc 4 is arranged on one side of the friction plate group 3, the piston 8 and the parking thrust disc 10 are installed in the inner cavity of the braking housing 5, and a disc spring 6 is arranged between the parking thrust disc 10 and the end housing 12; one end of the bridge housing arm 1 is radially symmetrically provided with a first threaded hole, the pressing disc 4 is radially symmetrically provided with a convex block 41, and the convex block 41 is provided with a second threaded hole 42 corresponding to the first threaded hole. The jacking bolt 2 passes through the first threaded hole and is screwed into the corresponding second threaded hole 42. Further, a back-tightening nut 7 is also arranged on the jacking bolt 2 to prevent loosening and oil leakage.

[0022] When the friction plate group 3 is locked (the disc spring 6 pushes the parking thrust disc 10, the parking thrust disc 10 pushes the piston 8, and the piston 8 pushes the pressing disc 4 to press the friction plate group 3 tightly), and the hydraulic system cannot provide hydraulic pressure, the vehicle cannot move. At this time, if the vehicle needs to move, just loosen the back-tightening nuts 7 on the two jacking bolts 2, screw in the jacking bolts 2 until the bolts are stressed. The head of the jacking bolt 2 will push the pressing disc 4 and push the pressing disc 4 away from the pressing position. Tighten the jacking bolts 2 to completely release the pressing disc 4, and the vehicle can then be towed or started.

[0023] In this embodiment, a reinforcing block 101 corresponding to the first threaded hole is installed on the bridge housing arm 1, and the reinforcing block 101 can improve the structural strength and stability of the bridge housing arm 1.

[0024] In this embodiment, the head of the jacking bolt 2 is a conical head, and the bottom of the second threaded hole 42 is a cone matching the conical head. The above conical design can increase the contact area and prevent the end face of the jacking bolt 2 from yielding deformation when subjected to the pressure of the disc spring 6.

[0025] In this embodiment, after the jacking bolt 2 is screwed into the second threaded hole 42, it is exposed with a length of 20 - 30 mm for convenient operation.

[0026] Generally, a general wet multi-disc brake does not have the function of measuring the braking gap in the non-disassembled state. If it is necessary to detect the braking gap, the brake must be disassembled, and many parameters need to be measured and calculated to obtain the braking gap data. However, the present utility model can measure the braking gap externally, and the measured data can be used to verify the differences between the design data and the actual assembly results, etc.; the specific measurement process is as follows:

[0027] Set the brake hydraulic system to the braking state, remove the ejector bolt 2, use a dial indicator with an extension rod to measure the second threaded hole 42. Note that the measuring needle of the dial indicator should not touch the hole wall. Insert it into the second threaded hole 42 until the dial indicator shows a reading. Continue to insert it until the reading of the dial indicator is greater than 3 mm, and then fix the dial indicator with a dial indicator support; zero the dial indicator pointer; then adjust the brake hydraulic system to the brake release state. The dial indicator pointer will change. At this time, the change amount of the dial indicator pointer is the braking gap of the brake. In actual tests, the brake braking and release states can be switched several times to observe the change value of the dial indicator to confirm the braking gap result.

[0028] The foregoing has shown and described the basic principles, main features and advantages of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, in any aspect, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention. Any reference signs in the claims should not be construed as limiting the claims involved.

[0029] In addition, it should be understood that although this specification is described according to the embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A driving axle braking structure capable of manual emergency release braking, comprising a bridge housing arm (1), a half shaft (9), a braking housing (5), an end housing (12) and a braking assembly, characterized in that: The braking housing (5) is arranged between the bridge housing arm (1) and the end housing (12); The braking assembly includes a friction plate group (3), a pressing disc (4), a disc spring (6), a piston (8) and a parking thrust disc (10), wherein: the friction plate group (3) includes a plurality of moving friction plates (31) and a plurality of static friction plates (32), the moving friction plates (31) are connected to the half shaft (9) through a spline sleeve (11), the static friction plates (32) are connected to the bridge housing arm (1) through a spline, the moving friction plates (31) and the static friction plates (32) are arranged alternately, a pressing disc (4) is arranged on one side of the friction plate group (3), the piston (8) and the parking thrust disc (10) are installed in the inner cavity of the braking housing (5), and a disc spring (6) is arranged between the parking thrust disc (10) and the end housing (12); One end of the bridge housing arm (1) is radially symmetrically provided with a first threaded hole, the pressing disc (4) is radially symmetrically provided with a convex block (41), and the convex block (41) is provided with a second threaded hole (42) corresponding to the first threaded hole, and the jacking bolt (2) passes through the first threaded hole and is screwed into the corresponding second threaded hole (42).

2. The drive axle braking structure capable of manual emergency release braking according to claim 1, characterized in that: A reinforcing block (101) corresponding to the first threaded hole is installed on the bridge housing arm (1).

3. The drive axle braking structure capable of manually and emergently releasing braking according to claim 1, wherein: A back-tightening nut (7) is further arranged on the jacking bolt (2).

4. The drive axle braking structure capable of manually and emergently releasing braking according to claim 1, wherein: The head of the jacking bolt (2) is a conical head, and the bottom of the second threaded hole (42) is a cone matching the conical head.

5. The drive axle braking structure capable of manual emergency release braking according to claim 1, characterized in that: After the jacking bolt (2) is screwed into the second threaded hole (42), the exposed length is 20 - 30 mm.

Images