Self-sealing transition joint structure for oil suction port of wet axle housing of loading machine

Abstract

The interior of a connector body is hollow, the upper section of the connector body is provided with an internal thread assembly plug screw, the lower section of the connector body is provided with an external thread assembly axle housing, the upper section and the lower section are sealed through O-shaped rings, and a lower gasket assembled on an inner hole step of the lower section is limited through a lower check ring arranged in an inner hole clamp spring groove; a D-shaped ring sealing groove is formed in the lower end face of the connector body. The plug is an inverted T-shaped cylinder with a small upper part and a large lower part; the upper gasket and the lower gasket are discs with positioning holes in the middle, and a plurality of oil passing holes are evenly distributed in the circumferential direction of the positioning holes. The supporting ring is a hollow cylinder with an inner hole; the bottom face of the D-shaped ring is a plane, the sealing face is an arc face, and the D-shaped ring and the plug form a sealing structure. The spring is arranged between the upper gasket and the lower gasket, the upper end face of the supporting ring is tightly attached to the lower end face of the upper gasket, and the upper gasket is limited through an upper check ring arranged in a small cylinder clamp spring groove of the plug. The problem that gear oil in a drive axle leaks out of an oil suction port when the whole loader is assembled or the drive axle is repaired, maintained and replaced is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of loader wet drive axle, in particular to a loader wet axle housing oil suction port self-sealing transition joint structure, especially applied to a loader with forced cooling wet axle drive axle. BACKGROUND

[0002] The loader drive axle is the core component of the whole machine power transmission and walking brake. The wet drive axle has significant technical advantages compared with the dry drive axle. On the one hand, the built-in brake structure can effectively avoid the risk of fire and combustion caused by high temperature of brake friction, adapt to the explosion-proof safety requirements of mine safety machine in underground operation, on the other hand, the brake components are immersed in oil, the brake performance is stable, the wear is small, and the service life is greatly improved, which has become the mainstream configuration of mine loader. For the heavy load working condition in underground, the mine loader with wet axle needs to be matched with a drive axle gear oil forced cooling system. The system extracts gear oil from the axle housing through the oil suction pipe, and delivers it to the brake cylinder after cooling, realizes oil temperature control, and guarantees the continuous and stable operation of the wet axle. The brake cylinder gear oil forced cooling structure has the following defects: first, during the assembly of the whole machine, the drive axle gear oil needs to be added first, and then the bridge housing plug needs to be disassembled to assemble the cooling oil suction pipe. This operation will inevitably cause the gear oil in the bridge to leak from the oil suction port, which not only causes oil waste but also increases the assembly and cleaning operation cost, and easily leads to the loss of control of the oil level in the bridge, affecting the transmission and brake cooling effect of the wet axle, and hiding the safety hidden danger of underground operation. Second, when the drive axle is repaired and maintained, the drive axle gear oil needs to be replaced, and the pipe needs to be disassembled, which will also cause the gear oil in the bridge to leak from the oil suction port. SUMMARY

[0003] The purpose of the present application is to provide a loader wet axle housing oil suction port self-sealing transition joint structure with simple and compact structure, convenient assembly and maintenance, and reliable use, which solves the problem of gear oil leakage from the oil suction port in the existing loader assembly or drive axle maintenance and replacement of drive axle gear oil.

[0004] To achieve the above objectives, the self-sealing transition joint structure for the wet axle housing oil suction port of the loader of the present invention includes a screw plug 1, an upper O-ring 2, a joint body 3, an axle housing 4, a D-ring 5, a plug 6, a lower gasket 7, a lower retaining ring 8, a spring 9, a lower O-ring 10, a support ring 11, an upper gasket 12, and an upper retaining ring 13; the joint body 3 has a hollow internal structure, with an internal thread in the upper section that mates with the screw plug 1 and an external thread in the lower section that mates with the axle housing 4, and the inner hole of the lower section has a... A step for assembling the lower gasket 7, with a retaining ring groove structure above the step for assembling the lower retaining ring 8. The upper end face of the lower gasket 7 is limited by the lower retaining ring 8. During assembly, the lower retaining ring 8 is engaged with the retaining ring groove in the lower section of the connector body 3. The lower end face of the connector body 3 is provided with a sealing groove for installing a D-ring 5. The plug 6 is an inverted T-shaped structure with a small cylinder on top and a large cylinder on the bottom. The lower gasket 7 is disc-shaped with a positioning hole in the middle, and multiple evenly spaced parts are arranged along the circumference of the positioning hole. Oil passage holes are provided; the support ring 11 is a hollow cylinder with an inner hole; the upper gasket 12 is disc-shaped with a positioning hole in the middle, and multiple evenly distributed oil passage holes are provided along the circumference of the positioning hole; the bottom surface of the D-ring 5 is flat, and the sealing surface is arc-shaped, forming a D-shaped sealing ring. During assembly, the arc-shaped surface faces down, and the arc-shaped sealing surface of the D-ring 5 forms a sealing structure with the upper surface of the large cylinder of the plug 6; the inner hole of the spring 9 is fitted into the small cylinder of the plug 6, and the spring 9... The end face is flat against the lower gasket 7, and the upper end face is tightly against the support ring 11. The upper end face of the support ring 11 is tightly against the lower end face of the upper gasket 12. The upper end face of the upper gasket 12 is limited by the upper retaining ring 13, which is inserted into the retaining ring groove above the small cylinder of the plug 6. A screw plug 1 is installed on the upper internal thread of the connector body 3. The screw plug 1 and the connector body 3 are sealed by the upper O-ring 2. The lower external thread of the connector body 3 is installed on the bridge housing 4 and sealed by the lower O-ring 10.

[0005] The cross-sectional thickness of the D-ring 5 is 1.5 mm.

[0006] The plug 6 has a small cylinder with a diameter of φ5 and a large cylinder with a diameter of φ29.5.

[0007] The lower gasket 7 has a thickness of 1.5mm, an outer diameter of φ22mm, a central positioning hole of φ5.1mm, and 7 oil passage holes with a diameter of φ5.5 evenly distributed around the circumference of the positioning hole.

[0008] The outer diameter of the support ring 11 is φ5.1mm, the inner diameter is φ10mm, and the outer diameter is φ5.1mm.

[0009] The upper gasket 12 has a thickness of 1.5mm, an outer diameter of φ30mm, a central positioning hole diameter of φ5.1mm, and six oil passage holes with a diameter of φ7.5 are evenly distributed around the circumference of the positioning hole.

[0010] The self-sealing transition joint structure is arranged on the oil suction port of the loader wet axle housing, and has the following technical characteristics and beneficial effects.

[0011] 1. When the oil suction pipe is not assembled, the lower section of the joint body 3 and the axle housing 4 are sealed by the lower O-ring 10, the upper section of the joint body 3 and the plug 1 are sealed by the upper O-ring 2, and the plug 6 is sealed with the lower section of the joint body 3 by the D-ring 5 under the action of the spring 9; when the oil suction pipe of the whole machine needs to be connected, the plug 6 is pushed downward by the oil suction pipe joint when the oil suction pipe joint is screwed into the internal thread of the upper section of the joint body 3, and a gap is formed between the plug 6 and the joint body 3; when the oil liquid flows out of the gap, the threads of the oil suction pipe have been connected with the internal threads of the upper section of the joint body 3, thereby solving the problem of gear oil leakage when the oil suction pipe of the whole machine is connected, fundamentally solving the problem of gear oil leakage caused by the forced cooling oil suction pipe when the drive axle is disassembled in the prior art, reducing oil waste and cost, reducing the time for wiping residual oil, improving assembly efficiency, and ensuring the stability of the oil level of the drive axle, thereby greatly reducing assembly cost and operation safety hazards.

[0012] 2. The self-sealing transition joint structure of the loader wet axle housing oil suction port has the advantages of simple and compact structure, convenient processing, high assembly efficiency, strong practicality, reliable use, and easy popularization. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is the main cross-sectional structure schematic diagram of the self-sealing transition joint structure of the loader wet axle housing oil suction port.

[0014] Figure 2 is Figure 1 the lower gasket structure schematic diagram.

[0015] Figure 3 is Figure 1 the upper gasket structure schematic diagram.

[0016] Figure 4 is Figure 1 the D-ring structure schematic diagram.

[0017] The drawings show that: plug 1, upper O-ring 2, joint body 3, axle housing 4, D-ring 5, plug 6, lower gasket 7, lower retainer ring 8, spring 9, lower O-ring 10, support ring 11, upper gasket 12, upper retainer ring 13. DETAILED DESCRIPTION

[0018] The specific embodiments of the self-sealing transition joint structure of the loader wet axle housing oil suction port will be further described in detail below with reference to the drawings.

[0019] Figures 1-4As shown, the loader wet axle housing oil suction port self-sealing transition joint structure of the present application comprises a screw plug 1, an upper O-shaped ring 2, a joint body 3, an axle housing 4, a D-shaped ring 5, a plug 6, a lower gasket 7, a lower retainer ring 8, a spring 9, a lower O-shaped ring 10, a support ring 11, an upper gasket 12 and an upper retainer ring 13; the joint body 3 is internally hollow, the upper section of the joint body 3 is provided with internal threads matched with the screw plug 1, the lower section is provided with external threads matched with the axle housing 4, and the lower section inner hole is provided with a step for assembling the lower gasket 7, the step is provided with a snap spring groove structure for assembling the lower retainer ring 8 above the step, the lower gasket 7 is a disc with a thickness of 1.5 mm and an outer circle of φ22 mm, is provided with a positioning hole of φ5.1 mm in the middle, and is provided with seven evenly distributed oil passing holes of φ5.5 mm in the circumferential direction of the positioning hole; the lower gasket 7 is limited by the lower retainer ring 8 on the upper end face, and the lower retainer ring 8 is assembled into the snap spring groove position of the lower section of the joint body 3; the D-shaped ring 5 is assembled into the sealing groove on the lower end face of the joint body 3, the D-shaped ring 5 has a cross-sectional thickness of 1.5 mm, a flat bottom surface and a circular arc sealing surface, which together form a D-shaped structure sealing ring, and the circular arc sealing surface faces downward during assembly, and the circular arc sealing surface of the D-shaped ring 5 forms a sealing structure with the upper surface of the large cylinder of the plug 6, the plug 6 is a reverse T-shaped structure with a small cylinder of φ5 on the upper side and a large cylinder of φ29.5 on the lower side; the inner hole of the spring 9 is sleeved into the small cylinder of the plug 6, the lower end face of the spring 9 is in close contact with the lower gasket 7, and the upper end face is in close contact with the support ring 11, the support ring 11 is a hollow cylinder with an inner hole of φ5.1 mm and an outer circle of φ10, the upper end face of the support ring 11 is provided with the upper gasket 12, the upper gasket 12 is a disc with a thickness of 1.5 mm and an outer circle of φ30 mm, is provided with a positioning hole of φ5.1 mm in the middle, and is provided with six evenly distributed oil passing holes of φ7.5 mm in the circumferential direction of the positioning hole, the upper gasket 12 is provided with the upper retainer ring 13 above the upper gasket 12, the upper retainer ring 13 is assembled into the snap spring groove above the small cylinder of the plug 6, and the plug 6 has an upward holding force under the action of the spring 9, so that the plug 6 and the joint body 3 are sealed through the D-shaped ring 5; the upper section internal threads of the joint body 3 are assembled with the screw plug 1, the screw plug 1 and the joint body 3 are sealed through the upper O-shaped ring 2, and the lower section external threads of the joint body 3 are assembled on the axle housing 4 and are sealed through the lower O-shaped ring 10.

[0020] The assembly steps of the loader wet axle housing oil suction port self-sealing transition joint structure of the present application are as follows:

[0021] 1. Assemble the D-shaped ring 5 into the snap spring groove of the lower section of the joint body 3, assemble the lower gasket 7 into the inner hole of the joint body 3, and snap the lower retainer ring 8 into the snap spring groove above the lower gasket 7.

[0022] 2. Insert the small end of the plug 6 into the inner hole of the lower gasket 7 and then into the joint body 3.

[0023] 3. After the spring 9 is sleeved into the small cylinder of the plug 6, the support ring 11 is sleeved, and then the upper gasket 12 is placed on the support ring 11.

[0024] 4, the upper gasket 12 is pressed downward by the tool, and the snap spring 13 is clamped into the snap spring groove above the small cylinder of the plug 6;

[0025] 5, the screw plug 1 equipped with the upper O-shaped ring 2 is screwed into the inner thread of the upper segment of the joint body 3, and the lower O-shaped ring 10 is assembled to the plug 6 as Figure 1 position, and finally the transition joint assembly is assembled to the axle housing 4.

[0026] The self-sealing transition joint structure is assembled to the wet axle housing oil suction port. When the oil suction pipe is not assembled, the lower segment of the joint body 3 and the axle housing 4 are sealed by the lower O-shaped ring 10, the upper segment of the joint body 3 and the screw plug 1 are sealed by the upper O-shaped ring 2, and the plug 6 is sealed with the lower segment of the joint body 3 by the D-shaped ring 5 under the action of the spring 9. When the oil suction pipe needs to be connected, the screw plug 1 is opened, and when the oil suction pipe joint is screwed into the inner thread of the upper segment of the joint body 3, the oil suction pipe joint can push the plug 6 to move downward. After the plug 6 moves downward, the plug 6 and the joint body 3 will have a gap, and the internal gear oil of the axle housing can flow into the hollow structure of the joint body 3 through the gap. The oil further flows into the oil suction pipe through the upper gasket 12 along the circumferential direction of the positioning hole. The oil suction pipe thread has been connected with the inner thread of the upper segment of the joint body 3 when the oil flows out, thereby solving the problem of gear oil leakage when the oil suction pipe is connected, and ensuring the stability of the oil level of the drive axle. The invention reduces the time for wiping the residual oil, improves the assembly efficiency, and finally improves the reliability of the drive axle and increases the enterprise income.

[0027] The loader wet axle housing oil suction port self-sealing transition joint structure is simple and compact, easy to process, and high in assembly efficiency, and can directly adapt to the oil port assembly demand of the loader wet drive axle. The invention fundamentally solves the problem of oil leakage during the disassembly and assembly of the cooling oil suction pipe after the gear oil of the drive axle is filled, eliminates the leakage phenomenon, ensures the stability of the oil level of the drive axle, reduces the assembly cost and the operation safety hazard, and finally improves the reliability of the drive axle.

Claims

1. A self-sealing transition joint structure for the oil suction port of a loader wet axle housing, characterized in that: It includes a screw plug (1), an upper O-ring (2), a connector body (3), a bridge housing (4), a D-ring (5), a plug (6), a lower gasket (7), a lower retaining ring (8), a spring (9), a lower O-ring (10), a support ring (11), an upper gasket (12), and an upper retaining ring (13); the connector body (3) has a hollow internal structure, with an internal thread in the upper section that mates with the screw plug (1) and an external thread in the lower section that mates with the bridge housing (4), and a step in the inner hole of the lower section for assembling the lower gasket (7). The step above is a retaining ring groove structure for mounting the lower retaining ring (8). The upper end face of the lower gasket (7) is limited by the lower retaining ring (8). When the lower retaining ring (8) is assembled, it is inserted into the retaining ring groove of the lower section of the connector body (3). The lower end face of the connector body (3) is provided with a sealing groove for installing the D-ring (5). The plug (6) is an inverted T-shaped structure with a small cylinder shape on the top and a large cylinder shape on the bottom. The lower gasket (7) is a disc shape with a positioning hole in the middle and multiple evenly distributed oil passage holes along the circumference of the positioning hole. The support ring (1 1) It is a hollow cylinder with an inner hole; the upper gasket (12) is disc-shaped with a positioning hole in the middle and multiple evenly distributed oil passage holes along the circumference of the positioning hole; the bottom surface of the D-ring (5) is flat and the sealing surface is arc-shaped, forming a D-shaped sealing ring. When assembled, the arc-shaped surface faces down, and the arc-shaped sealing surface of the D-ring (5) forms a sealing structure with the upper surface of the large cylinder of the plug (6); the inner hole of the spring (9) is fitted into the small cylinder of the plug (6), the lower end face of the spring (9) is flat against the lower gasket (7), and the upper end face The upper end face of the support ring (11) is close to the lower end face of the upper gasket (12). The upper end face of the upper gasket (12) is limited by the upper retaining ring (13), which is inserted into the retaining ring groove above the small cylinder of the plug (6). A screw plug (1) is installed on the upper internal thread of the connector body (3). The screw plug (1) and the connector body (3) are sealed by the upper O-ring (2). The lower external thread of the connector body (3) is installed on the bridge housing (4) and sealed by the lower O-ring (10).

2. The self-sealing transition joint structure for the oil suction port of the loader wet axle housing according to claim 1, characterized in that: The cross-sectional thickness of the D-ring (5) is 1.5 mm.

3. The self-sealing transition joint structure for the oil suction port of the loader wet axle housing according to claim 1, characterized in that: The plug (6) has a small cylinder with a diameter of φ5 and a large cylinder with a diameter of φ29.

5.

4. The self-sealing transition joint structure for the oil suction port of the loader wet axle housing according to claim 1, characterized in that: The lower gasket (7) has a thickness of 1.5 mm, an outer diameter of φ22 mm, a central positioning hole of φ5.1 mm, and seven oil passage holes with a diameter of φ5.5 evenly distributed around the circumference of the positioning hole.

5. The self-sealing transition joint structure for the oil suction port of the loader wet axle housing according to claim 1, characterized in that: The outer diameter of the support ring (11) is φ5.1mm and the outer diameter is φ10.

6. The self-sealing transition joint structure for the oil suction port of the loader wet axle housing according to claim 1, characterized in that: The upper gasket (12) has a thickness of 1.5 mm, an outer diameter of φ30 mm, a central positioning hole diameter of φ5.1 mm, and six oil passage holes with a diameter of φ7.5 are evenly distributed around the circumference of the positioning hole.

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