Stable structure for lifting drive axle of narrow wheel type drill jumbo

Abstract

The utility model discloses a stable structure for lifting a drive axle of a narrow wheel type drill jumbo, which comprises an axle housing, axle shafts connected to two ends of the axle housing, rigid couplings connected to the end parts of the axle shafts, and a swing mounting seat connected to the rigid couplings through a swing cross frame, a brake spring for pushing the brake disc to brake is arranged in the clutch at the end of the axle shaft, and a pressurizing oil way is connected to a brake oil way between the clutch and the brake hydraulic system. The effect of improving the running stability and safety of the drill jumbo is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of drive axles, in particular to a stable structure of a drive axle for lifting a narrow wheeled rock drilling trolley. Background Art

[0002] Epiroc's original K41 rock drilling rig is mainly used for small-section excavation in underground mines. Due to the narrow width of this type of rig, the original rig chassis design uses a hydraulic closed system to drive the gearbox and then a drive shaft to drive the front and rear drive axles. The drive axle is only 1.2 meters long, which is prone to rollover accidents when driving on uneven roads or turning underground. The safety risk is extremely high, so many mines have stopped using this type of equipment. Summary of the invention

[0003] The technical problem to be solved by the utility model is that the existing K41 rock drilling trolley has the hidden danger of overturning when digging small sections in underground mines.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a stable structure of a driving axle for lifting narrow-wheeled rock drilling trolleys, including a bridge housing, a bridge shaft connected to both ends of the bridge housing, a rigid coupling connected to the end of the bridge shaft, and a swing mounting seat connected to the rigid coupling through a swing cross frame, extension sections are provided on both sides of the middle of the bridge shaft, a brake spring for pushing the brake disc to brake is provided in the clutch at the end of the bridge shaft, and a boost oil circuit is connected to the brake oil circuit between the clutch and the brake hydraulic system.

[0005] Preferably, the oil pressure of the brake oil circuit is 5 MPa.

[0006] Preferably, a pressure reducing valve is installed on the brake oil circuit.

[0007] Preferably, the distance between the wheels on the two swing mounting seats is 1.8 m.

[0008] 1. The utility model provides a stable structure for lifting the drive axle of a narrow wheeled rock drilling trolley. Under the premise of not changing the overall center of gravity height and the frame beam structure, the width of the drive axle is increased, and the original drive axle length of 1.2 meters is widened to 1.8 meters, thereby ensuring the stability of the vehicle when walking and turning, fundamentally solving the problem of safety risks in the work of the trolley, and thus improving the working efficiency of the rock drilling trolley.

[0009] 2. By strengthening the spring brake inside the brake disc, the spring brake can be used during parking brake, and the hydraulic release brake can be released to reduce the burden on the hydraulic system; during driving brake, when the brake is fixed, the spring automatic braking ensures stable and safe braking. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0011] Figure 1 It is a structural schematic diagram of an embodiment of the utility model.

[0012] Figure 2 It is a structural schematic diagram of a hydraulic brake system according to an embodiment of the utility model.

[0013] Figure 3 It is a structural schematic diagram of a hydraulic brake system in the prior art.

[0014] In the figure: 1. bridge housing; 2. bridge shaft; 3. rigid coupling; 4. swing cross frame; 5. swing mounting seat; 6. three-way joint at point A; 7. three-way joint at point B; 8. three-way joint at point C; 9. pressure reducing valve. DETAILED DESCRIPTION

[0015] like Figure 1 and Figure 2 The utility model provides a stable structure of a driving axle of a lifting narrow wheeled rock drilling trolley, comprising a bridge housing 1, a bridge shaft 2 connected to both ends of the bridge housing 1, a rigid coupling 3 connected to the ends of the bridge shaft 2, and a swing mounting seat 5 connected to the rigid coupling 3 through a swing cross frame 4, an extension section is arranged on both sides of the middle of the bridge shaft 2, a brake spring for pushing a brake disc to brake is arranged in a clutch at the end of the bridge shaft 2, and a booster oil circuit is connected to the brake oil circuit between the clutch and the brake hydraulic system.

[0016] contrast Figure 2 and Figure 3 When strengthening the braking system, the pipeline between the original three-way joint 8 at point C and the three-way joint 7 at point B is disconnected, the outlet of the three-way joint 8 at point C is blocked, and the three-way joint 7 at point B is directly connected to the three-way joint 6 at point A through a pipeline; after the improvement, the brake supply pressure of the hydraulic braking system is increased from 2.5MPa to 5MPa, and correspondingly, the elastic coefficient of the brake spring is increased, the elastic braking of the brake spring is enhanced, and the automatic braking of the brake spring can be realized.

[0017] The width of the drive axle is increased from the original 1.2 meters to 1.8 meters through the extension section, and the height of the drive axle is maintained, thereby ensuring that the center of gravity position remains unchanged and improving the stability of the rock drilling rig.

[0018] As a preferred embodiment of the present utility model, the oil pressure of the brake oil circuit is 5 MPa.

[0019] like Figure 2 As shown. A pressure reducing valve 9 is installed on the brake oil circuit. By changing the oil circuit of the brake system, after the oil pressure is enhanced, the stability of the oil pressure is improved through the pressure reducing valve.

[0020] As a preferred embodiment of the utility model, the distance between the wheels on the two swing mounting seats 5 is 1.8 m. By increasing the distance between the wheels on both sides of the trolley, the stability of the trolley during turning is improved.

Claims

1. A stable structure for lifting a narrow wheeled rock drilling trolley drive axle, comprising a bridge housing (1), a bridge shaft (2) connected to both ends of the bridge housing (1), a rigid coupling (3) connected to the end of the bridge shaft (2), and a swing mounting seat (5) connected to the rigid coupling (3) via a swing cross frame (4), characterized in that: Extension sections are arranged on both sides of the middle of the bridge shaft (2), a brake spring for pushing a brake disc for braking is arranged in a clutch at the end of the bridge shaft (2), and a booster oil circuit is connected to the brake oil circuit between the clutch and the brake hydraulic system.

2. A stable structure for lifting a narrow wheeled rock drilling trolley drive axle as claimed in claim 1, characterized in that: The oil pressure of the brake oil circuit is 5 MPa.

3. A stable structure for lifting a narrow wheeled rock drilling trolley drive axle as claimed in claim 1, characterized in that: A pressure reducing valve (9) is installed on the brake oil circuit.

4. A stable structure for lifting a narrow wheeled rock drilling trolley drive axle as claimed in claim 1, characterized in that: The distance between the wheels on the two swing mounting seats (5) is 1.8 m.

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