CN212313675U

CN212313675U - Front axle kingpin oiling structure and front axle assembly

Info

Publication number: CN212313675U
Application number: CN202021644693.5U
Authority: CN
Inventors: 吴志强; 李金岳; 刘爱萍; 李春光
Original assignee: Guangdong Fuwa Heavy Industry Co Ltd
Current assignee: Guangdong Fuwa Heavy Industry Co Ltd
Priority date: 2020-08-10
Filing date: 2020-08-10
Publication date: 2021-01-08
Anticipated expiration: 2030-08-10

Abstract

The utility model discloses a front axle kingpin oiling structure and a front axle assembly, wherein the front axle kingpin oiling structure comprises a front shaft, a steering knuckle and a kingpin; the end part of the main pin penetrates out of the front shaft to form a protruding part, and a shaft hole is formed in the steering knuckle; an assembly gap is formed between the shaft hole and the main pin, a drain valve and an oil cup are arranged on the steering knuckle, the drain valve comprises a pipe body, a plugging piece and an elastic piece, a first opening and a second opening are formed in the pipe body, the plugging piece is arranged in the pipe body and can move between a first position located between the first opening and the second opening to enable the first opening and the second opening to be disconnected and a second position located on one side, far away from the first opening, of the second opening to enable the first opening and the second opening to be connected, and the elastic piece is used for pushing the plugging piece towards the first opening. The utility model discloses when pouring into the grease into the fitting gap through the oil cup, make the blow-off valve open air and old grease in the discharge fitting gap, make things convenient for the oiling operation.

Description

Front axle kingpin oiling structure and front axle assembly

Technical Field

The utility model relates to the technical field of vehicles, concretely relates to front axle swizzle oiling structure and have front axle assembly of this oiling structure.

Background

The end of the front axle of a vehicle is usually provided with a steering knuckle, the steering knuckle is pivotally matched with the end of a front axle through a kingpin so as to enable the front axle to have a steering function, and because the kingpin is rotationally matched with the steering knuckle, grease needs to be injected into a gap formed between the kingpin and the steering knuckle so as to lubricate the rotation of the kingpin and the steering knuckle. The existing front axle is usually filled with grease into the gap through an oil cup, and because the main pin and the steering knuckle have good sealing performance to prevent grease leakage, when new grease is filled into the gap, air and old grease in the gap cannot be discharged, so that the process of filling the grease becomes very difficult.

SUMMERY OF THE UTILITY MODEL

The utility model provides a not enough to prior art, the utility model aims at providing a front axle king pin oiling structure, it can make the air in knuckle and the king pin clearance and old grease discharge smoothly when filling new grease.

The invention also aims to provide a front axle assembly.

In order to achieve the above object, the utility model adopts the following technical scheme:

the front axle kingpin oiling structure comprises a front shaft, a steering knuckle and a kingpin; the main pin is connected to the end part of the front shaft in a penetrating manner, the end part of the main pin penetrates out of the front shaft to form a protruding part, a shaft hole for embedding the protruding part of the main pin is formed in the steering knuckle, and the outer side end of the shaft hole is a blind end; an assembly gap is formed between the inner wall of the shaft hole and the main pin, a drain valve and an oil cup communicated with the outer side end of the shaft hole are arranged on the steering knuckle, the drain valve comprises a pipe body which is arranged on the steering knuckle and communicated with the periphery of the assembly gap, a plugging piece and an elastic piece, a first opening communicated with the assembly gap and a second opening communicated with the outside are arranged on the pipe body, the plugging piece is arranged in the pipe body and can move between a first position and a second position, wherein the first position is located between the first opening and the second opening so that the first opening and the second opening are disconnected, and a second position is located on one side, away from the first opening, of the second opening so that the first opening and the second opening are communicated, and the elastic piece is used for providing elastic stress for pushing the plugging piece towards the first opening so that the plugging piece is located at the first position.

The first opening is arranged at one end, close to the assembly gap, of the pipe body, the second opening is formed in the side wall of the pipe body, a step surface located between the first opening and the second opening is arranged on the inner wall of the pipe body, a first section is formed by the portion, located between the step surface and the first opening, of the inner wall of the pipe body, a second section is formed by the portion, located between the step surface and the second opening, of the inner wall of the pipe body, the inner diameter of the first section is smaller than that of the second section, and the plugging piece is arranged in the second section and abuts against the step surface and is in airtight fit with the step surface when the plugging piece is located.

The step surface is a conical surface, and the plugging piece is a steel ball matched with the conical surface.

The elastic piece is a spring, one end of the spring is abutted against the steel ball, and the other end of the spring is abutted against one end of the pipe body far away from the installation gap.

One end of the pipe body, which is far away from the installation gap, is connected with a fixing cap, and the other end of the spring is abutted against the fixing cap.

The fixing cap is fixedly connected with the pipe body in a thread matching mode.

An end cover is detachably fixed on the steering knuckle, and the end cover is in close fit with the steering knuckle and covers the outer side end of the shaft hole.

A bushing positioned between the main pin and the inner wall of the shaft hole is embedded in the assembly gap, and an oil groove is formed in the bushing.

In order to achieve the second purpose, the utility model adopts the following technical scheme:

the front axle assembly comprises the front axle kingpin oiling structure.

The beneficial effects of the utility model reside in that:

compared with the prior art, the utility model discloses install the blow-off valve on the knuckle, when pouring into the grease into through the oil cup in to the fit-up gap, fit-up gap internal pressure increases, makes the blow-off valve open, air and old grease in the fit-up gap of discharging simultaneously, when accomplishing the oiling, blow-off valve self-closing makes the fit-up gap get back to encapsulated situation again to make things convenient for the oiling operation of front axle swizzle, improved the efficiency that the front axle maintained, reduced the cost that the front axle maintained.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a cross-sectional view A-A of FIG. 1;

fig. 3 is an enlarged view at B in fig. 2.

Detailed Description

The invention will be further described with reference to the accompanying drawings and specific embodiments:

as shown in fig. 1, 2 and 3, the front axle kingpin oiling structure of the present invention can discharge air and old grease while injecting new grease. Specifically, the oil injection structure comprises a front shaft 10, a knuckle 20 and a main pin 30, wherein the main pin 30 is connected to the end of the front shaft 10 in a penetrating manner, a protruding portion is formed by the end of the main pin 30 penetrating through the front shaft 10, a shaft hole 21 is formed in the knuckle 20, the outer side end of the shaft hole 21 is a blind end, the protruding portion protruding out of the front shaft 10 on the main pin 30 is connected in the shaft hole 21 in a penetrating manner and is matched with the knuckle 20 in a pivoting manner, after the protruding portion on the main pin 30 penetrates through the shaft hole 21, a transfer gap is formed between the inner wall of the shaft hole 21 and the main pin 30, the transfer gap comprises a first portion located between the periphery of the main pin 30 and the inner wall of the shaft hole 21 and a second portion located between the end face of the main pin 30 and the blind end face of the shaft hole 21, and the transfer gap is used for accommodating grease so as to lubricate; a drain valve 50 and an oil cup 40 are mounted on the steering knuckle 20, wherein the oil cup 40 is mounted on the steering knuckle 20, the inner end of the oil cup 40 is positioned on the inner side of the blind end surface of the shaft hole 21 and is communicated with the assembly gap, i.e. the oil cup 40 is communicated with the second part of the assembly gap, grease is injected into the assembly gap through the oil cup 40, the drain valve 50 is mounted on the outer periphery of the steering knuckle 20 and comprises a pipe body 51, a steel ball 52 and a spring 53, the pipe body 51 is fixedly mounted on the steering knuckle 20, one end of the pipe body facing the assembly gap forms a first opening 515, and the assembly gap is communicated with the inner hole of the pipe body 50 through the first opening 515; in addition, a second opening 514 communicated with the outside is further formed on the tube body 51, the second opening 514 is arranged far away from the first opening 515, the steel ball 52 is arranged in an inner hole of the tube body 51 and moves in the tube body 51, when the steel ball 52 moves to a first position between the first opening 515 and the second opening 514 in the tube body 51, the steel ball 52 blocks the inner hole of the tube body 51, so that the first opening 515 and the second opening 514 are disconnected, when the steel ball 52 moves to a side far away from the first opening 515 towards the position far away from the first opening 515 and is positioned at the second opening 514 far away from the first opening 515, the steel ball 52 avoids the second opening 514, at the moment, the first opening 515 and the second opening 514 can be communicated, the spring 53 is used for providing an elastic stress, under the action of the elastic stress, the steel ball 52 has a tendency of moving towards the first opening 515, therefore, under the condition that the steel ball 52 is not subjected to other external forces, keeping the steel ball 52 in the first position at all times.

When oil is filled into the assembly gap, grease enters the assembly gap from the oil cup 40, so that the pressure in the assembly gap is gradually increased, the first opening 515 of the pipe body 51 is communicated with the assembly gap, the pressure at the first opening 515 is also gradually increased, the pressure in the assembly gap pushes the steel ball 52 to move towards the direction away from the first opening 515, the steel ball 52 is gradually moved to the second position from the first position, at the moment, the assembly gap is communicated with the external environment through the first opening 515 and the second opening 514 on the pipe body 51, so that air and old grease in the assembly gap are slowly discharged from the second opening 514 under the extrusion of the continuously injected new grease, the new grease is continuously injected into the assembly gap through the oil cup 40 until the old grease in the assembly gap is emptied through the second opening 514, and the oil filling of the front axle main pin is completed; when the oil filling is completed, the oil cup 40 is not enlarged into the assembly gap, the cylinder body 52 is reset from the second position to the first position under the pushing of the spring 53, and the first opening 515 and the second opening 514 are disconnected again, so that the assembly gap is sealed again.

In a preferred embodiment, the present invention provides a step surface 513 on the inner wall of the tube 51, the step surface 513 is located between the first opening 515 and the second opening 514, the step surface 513 divides the interior of the tube 51 into two parts, wherein the part located between the step surface 513 and the first opening 515 is the first section 511, the part located between the step surface 513 and the second opening 514 is the second section 512, the inner diameter of the first section 511 is smaller than the inner diameter of the second section 512, i.e. the inner hole of the tube 51 is configured as a variable cross-section, the steel ball 52 is disposed in the second section 512, the outer diameter thereof is equivalent to the inner diameter of the second section 512, i.e. the steel ball 52 can move along the extending direction of the second section 512, the outer diameter of the steel ball 52 is larger than the inner diameter of the first section 511, when the steel ball 52 moves to the step surface 513 towards the first opening 515 under the elastic stress of the spring 53, the steel ball 52 abuts on the step surface 513, is stopped by the step surface 513 and is tightly fitted, the steel ball 52 is pressed tightly by the spring 53, so that the joint of the steel ball 52 and the step surface 513 has better sealing performance, namely, in the running process of a vehicle, the grease in the assembly gap can be prevented from leaking outwards. In the above embodiment, the first opening 515 is provided at one end of the pipe body 51 near the fitting gap, and the second opening 514 is provided on the side wall of the pipe body 51, but in practice, the positions of the first opening 515 and the second opening 514 are not limited to the above embodiment, as long as the first opening 515 and the fitting gap are communicated, the second opening 514 and the external environment are communicated, and the first opening 515 and the second opening 514 can be disconnected or connected by the movement of the steel ball 52. In order to further improve the sealing performance of the steel ball 52 in cooperation with the step surface 513, the utility model discloses set the step surface 513 as the conical surface, like this, make the steel ball 52 inlay in the taper hole that the conical surface encloses when being in the first position to extrude the steel ball 52 through the spring 53, make the steel ball 52 surface closely laminate with the conical surface, thereby ensure the sealing performance. Of course, the steel ball 52 of the present invention may be other members that can be disconnected and connected between the first opening 515 and the second opening 514 when moving along the pipe body 51 as the blocking member. In the above structure, one end of the spring 53 abuts against the steel ball 52, and the other end abuts against one end of the pipe body 51 far from the installation gap; as an elastic member for pushing the blocking member, the spring 53 may be replaced by other elastic members, such as a rubber block having elasticity. Further, a fixing cap 54 is provided at an end of the pipe body 51 remote from the mounting gap, and when mounting, the steel ball 52 and the spring 53 are inserted in order from the end of the pipe body 51 remote from the mounting gap, and then the fixing cap 54 is fixed to the pipe body 51 to press the spring 53 so that the spring 53 can push the steel ball 52 toward the first opening 515. In a preferred embodiment, the fixing cap 54 may be screwed with the tube 51, that is, the fixing cap 54 is screwed on the tube 51, and when the fixing cap 54 is screwed, the degree of compression of the spring 53 by the fixing cap 54 can be adjusted, and then the compression amount of the spring 53 is adjusted, so that the pressure required for filling oil from the oil cup 40 can be adjusted.

An end cap 23 is fixed to the knuckle 20, the end cap 23 is detachably fixed to the knuckle 20 by a bolt, the end cap 23 is hermetically fitted to the knuckle 20 and covers the outer end of the shaft hole 21, and the end cap 23 is used as a blind end wall of the shaft hole 21. A bush 22 is further inserted into the fitting gap, the bush 22 is interposed between the kingpin 30 and the inner wall of the shaft hole 21 to support the kingpin 30 and the knuckle 20 while reducing wear of the kingpin 30 and the knuckle 20, and an oil groove is provided in the bush 22, through which lubricating oil flows to lubricate a joint of the bush 22 with the kingpin 30 and the inner wall of the shaft hole 21.

The utility model discloses a front axle assembly includes foretell front axle swizzle oiling structure.

The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still make modifications to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some technical features, and these modifications or substitutions do not make the essence of the corresponding technical solutions depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. The front axle kingpin oiling structure is characterized by comprising a front shaft, a steering knuckle and a kingpin; the main pin is connected to the end part of the front shaft in a penetrating manner, the end part of the main pin penetrates out of the front shaft to form a protruding part, a shaft hole for embedding the protruding part of the main pin is formed in the steering knuckle, and the outer side end of the shaft hole is a blind end; an assembly gap is formed between the inner wall of the shaft hole and the main pin, a drain valve and an oil cup communicated with the outer side end of the shaft hole are arranged on the steering knuckle, the drain valve comprises a pipe body which is arranged on the steering knuckle and communicated with the periphery of the assembly gap, a plugging piece and an elastic piece, a first opening communicated with the assembly gap and a second opening communicated with the outside are arranged on the pipe body, the plugging piece is arranged in the pipe body and can move between a first position and a second position, wherein the first position is located between the first opening and the second opening so that the first opening and the second opening are disconnected, and a second position is located on one side, away from the first opening, of the second opening so that the first opening and the second opening are communicated, and the elastic piece is used for providing elastic stress for pushing the plugging piece towards the first opening so that the plugging piece is located at the first position.

2. The front axle kingpin oiling structure of claim 1, wherein the first opening is provided at an end of the tube body near the fitting gap, the second opening is provided on a side wall of the tube body, and an inner wall of the tube body is provided with a step surface between the first opening and the second opening, a portion of the inner wall of the tube body between the step surface and the first opening forms a first section, a portion between the step surface and the second opening forms a second section, an inner diameter of the first section is smaller than an inner diameter of the second section, and the blocking member is disposed in the second section and abuts against the step surface and is in close fit with the step surface when the blocking member is at the first position.

3. The front axle kingpin oiling structure of claim 2 wherein the step surface is a conical surface and the blocking member is a steel ball that mates with the conical surface.

4. The front axle kingpin oiling structure of claim 3 wherein the resilient member is a spring having one end abutting the steel ball and the other end abutting the end of the tube distal from the mounting gap.

5. The front axle kingpin oiling structure of claim 4 wherein the end of the tube remote from the mounting gap is connected to a retaining cap against which the other end of the spring abuts.

6. The front axle kingpin oiling structure of claim 5 wherein the retaining cap is fixedly attached to the tube in a threaded engagement.

7. The front axle kingpin oiling structure of claim 1 wherein an end cap is removably secured to the knuckle and sealingly engages the knuckle and seals the outboard end of the axle bore.

8. The front axle kingpin oiling structure of claim 1 wherein a bushing is inserted into the assembly gap between the kingpin and the inner wall of the axle bore, the bushing having oil grooves.

9. Front axle assembly, characterized in that it comprises a front axle kingpin arrangement according to any of claims 1 to 8.