CN201184374Y

CN201184374Y - Ball cage synchronous universal drive shaft

Info

Publication number: CN201184374Y
Application number: CNU2008200658463U
Authority: CN
Inventors: 王朝襄; 易平; 陈思立; 俞汉桥; 张爱斌
Original assignee: XIANGFAN BOYA MACHINERY CO Ltd
Current assignee: Xiangyang Boya Precision Industrial Equipments Co Ltd
Priority date: 2008-03-06
Filing date: 2008-03-06
Publication date: 2009-01-21
Anticipated expiration: 2018-03-06

Abstract

A synchronous spherical cage universal transmission shaft suiting wheel driving of an amphibious vehicle is characterized in that a spline shaft pair is inserted into an inner hole of a universal node along the axial direction; a sealing system therebetween is composed of an inner grease stopping cover and a sealing cover; the spline shaft pair is used for connecting two universal nodes arranged on both ends as a whole; a spline shaft liner and a spline shaft are respectively arranged in a matched inner spline hole of the two universal nodes and can slip relatively; an air tap is formed on the spline shaft pair; and a water sealing device is selected from an air-ventilating waterproof structure and is connected with the universal nodes through threads. In the operation process, the spline shaft pair can achieve axial deformation compensation to sway the universal nodes on both ends, thereby effectively preventing the generation of hot air pressure due to the friction of the universal nodes when driving on the ground, improving the sealing effect of the universal nodes, eliminating thermal expansion resulting from the internal hot air pressure, preventing expansion and damage of the sealing cover due to the invasion of excessive lubricating grease into the sealing cover during operation of the transmission shaft, and preventing the invasion of water into the transmission shaft. The synchronous spherical cage universal transmission shaft suits the amphibious operational environment.

Description

Ball cage synchronous universal transmission shaft

Affiliated technical field

The utility model relates in a kind of vehicle transmission field, and particularly special vehicle wheel limit drives with ball cage synchronous universal transmission shaft.

Background technique

Common wheel limit drives and with transmission shaft cross-axle universal shaft transmission shaft, ball cage synchronous universal transmission shaft etc. is arranged in the Hyundai Motor industry; The cross-axle universal shaft transmission shaft has a wide range of applications in the heavy goods vehicles field, ball cage synchronous universal transmission shaft is bigger than cross-axle universal shaft transmission shaft because of its operating angle, instantaneous synchronism is more excellent than cross-axle universal shaft transmission shaft, therefore the mobility of automobile, the special vehicle that cross-country ability has higher requirements are being taken turns in the live axle field, limit, ball cage synchronous universal transmission shaft is used widely, but there is following defective in present ball cage synchronous universal transmission shaft: 1, poor because of its sealing system waterproofing effect, vehicle only adapts on land and travels the amphibious working environment of incompatibility; 2, because of there is design deficiency in sealing water device, in use, driving universal joint in land produces hot barometric pressure because of frictional heating, and the universal joint cavity internal pressure is long-term excessive and can not get discharging, and inner and ambient pressure imbalance influence its working life; 3, in the transmission shaft operation process, too much lubricating grease enters in the seal closure, under excessive centrifugal action, seal closure is expanded, and destroys seal closure; The destruction of seal closure can cause pollutants such as dust to enter in the universal joint, aggravates its wearing and tearing to make universal joint generation early failue; 4, in operation process, because the self friction of seal closure inside causes its rate of decay to be accelerated.

Summary of the invention

For overcoming the deficiencies in the prior art; goal of the invention of the present utility model is to provide a kind of ball cage synchronous universal transmission shaft that adapts to amphibious operating conditions; produce hot barometric pressure to solve discharge land driving universal joint because of frictional heating; balance inside and ambient pressure; improve the universal joint sealing effect and eliminate the thermal expansion problem that internal heat air pressure is drawn; realize the effective waterproof when transmission shaft is worked in water, lubricated environment makes the universal joint proper functioning in the protection universal joint.

The technical solution of the utility model is: sealing water device is contained in the endoporus of rzeppa universal joint, splined shaft axle pair is through in the inner splined hole that matches of cover in the rzeppa universal joint vertically, between rzeppa universal joint and the splined shaft axle pair sealing system is arranged, its sealing system is combined by interior grease blocking cover and seal closure, the opening subtend rzeppa universal joint of interior grease blocking cover, and be enclosed within the seal closure internal surface, together be contained on the outer edge surface of overcoat of rzeppa universal joint, the seal closure small end is fastened on the hub splines.

Rzeppa universal joint of the present utility model can be two, two rzeppa universal joints split the two ends in splined shaft axle pair relatively, splined shaft axle pair is through vertically in the endoporus of two rzeppa universal joints it is connected as a single entity, be sliding fit between the hub splines of splined shaft axle pair and the splined shaft, slippage relatively, hub splines is contained in respectively in the inner splined hole that matches of two rzeppa universal joints with splined shaft, on the splined shaft axle pair ventilation mouth is arranged.

Sealing water device of the present utility model is equipped with elastomer diaphragm for the ventilation waterproof construction between the vent plug body of sealing water device and the diaphragm seat.

Sealing water device of the present utility model and rzeppa universal joint are scyewed joint.

The utility model is in running, the secondary parts of splined shaft axle are used for realizing the axial stretching compensate function, two rzeppa universal joint parts at two ends, be used for realizing swing, because the optimal design of ventilation waterproof construction and sealing system, too much lubricating grease enters in the seal closure under action of centrifugal force in the time of can effectively preventing the transmission shaft running, swells, destroys seal closure to form excessive additional centrifugal force, simultaneously can stop water to enter transmission shaft, so that vehicle adapts to the dual-purpose working environment in water route.

The utility model compared with prior art has the following advantages:

1, the project organization that is used in combination of seal closure and interior grease blocking cover can prevent that pollutants such as lubricating grease and dust from entering sealing system and transmission shaft, prolongs its working life;

2, sealing water device has ventilation and water-proof function simultaneously, can effectively regulate the air pressure inside in the transmission shaft transmission, and anti-sealing enters transmission shaft, improves running environment, realizes that the water route is dual-purpose;

3, the flange-type of universal joint overcoat connects, for the dismounting of ball cage synchronous universal transmission shaft is provided convenience.

4, because can relative slippage between the hub splines of splined shaft axle pair and the splined shaft, the optimal design of rzeppa universal joint joint part, the extending amount when making the transmission shaft transmission, pendulum angle, working speed are improved significantly.

Description of drawings

Below in conjunction with accompanying drawing the utility model is further described:

Accompanying drawing is the utility model structural drawing.

Embodiment

In the accompanying drawing: the big clip 16-of grease blocking cover 14-seal closure 15-lesser calorie hoop 17-ventilation mouth 18-nut 19-seal ring 20-rubber pad 21-hub splines 22-protecting cover 23-splined shaft 24-Steel Cable Baffle Ring 25-splined shaft axle pair in the cover 11-overcoat 12-steel ball 13-in the 1-rzeppa universal joint 2-sealing water device 3-elastomer diaphragm 4-diaphragm seat 5-vent plug body 6-hole back-up ring 7-plug 8-shaft retaining ring 9-retainer 10-

As shown in the figure, two rzeppa universal joints 1 of the present utility model split the two ends in splined shaft axle pair 25, by splined shaft axle pair 25 it is connected as a single entity, be sliding fit between the hub splines 21 of splined shaft axle pair 25 and the splined shaft 23, slippage relatively, hub splines 21 is contained in respectively in the inner splined hole that matches of two rzeppa universal joints 1 with splined shaft 23, and cover 10 positions prevent that slippage from getting loose in being limited by shaft retaining ring 8, Steel Cable Baffle Ring 24; Sealing water device 2 is the ventilation waterproof construction, between vent plug body 5 in it and the diaphragm seat 4 elastomer diaphragm 3 is housed, be used for discharging, balance universal joint inner chamber hot barometric pressure also ensures to have the sealing effect when water environment is worked, form with scyewed joint is connected on the rzeppa universal joint 1, the design of overcoat 11 upper-end surfaces has four groups of stepped tooths and four through holes to be used for and corresponding tie-plate upper trapezoid teeth groove engagement, with bolton transmitting torque afterwards, be symmetrical arranged two greasing screws and be used for grease up, screw in and shutoff with two plugs 7 after finishing, prevent that reliably lubricating grease from throwing away when transmission shaft is worked, design has circlip groove mounting hole back-up ring 6 to prevent sealing water device 2 loose or dislocations on step hole, on outer round surface the design have annular groove be used in grease blocking cover 13, seal closure 14, the reliable installation of big clip 15, big clip 15 is used for interior grease blocking cover 13, seal closure 14 big ends are fastened on the overcoat 11, lesser calorie hoop 16 is used for seal closure 14 small ends are fastened on hub splines 21, interior grease blocking cover 13 is used for the lubricating grease block in universal joint, centrifugal forces affect seal closure 14 proper functioning that lubricating grease is formed when universal joint turns round; Also design on the overcoat 11 six inside circular arc raceways of equally distributed opening on circumference are arranged, the raceway normal section is circular or oval, become corresponding relation with six of design on the interior cover 10 outside circular arc raceway of equally distributed opening on circumference, guarantee the work of moving about of six steel balls 12 overlap 10 in the qualification lower edge of retainer 9, overcoat 11 forms circular arc raceway, thereby make the synchronism of six part 12 centers assurance universal joint in the same plane all the time in the universal joint swing, retainer 9, interior cover 10, overcoat 11 are that spherical pair cooperates; In secondary 25 parts of splined shaft axle, shaft retaining ring 8, Steel Cable Baffle Ring 24 each one be installed in the corresponding draw-in groove, overlap 10 positions in limiting and bear axial additional force, two ventilation mouths 17 are used for axle secondary inside and outside air pressure of trunnion shaft when secondary flexible, hub splines 21 considers to be designed to weldment from manufacturability, protecting cover 22, splined shaft 23 take welding to connect, and it is locking with protecting cover 22 fastening backs that rubber pad 20 is used for nut 18.

Two overcoats 11 can be different with the external interface form, overcoat 11 can change interface shape as required, two overcoat interface shapes shown in the drawings are identical, the design of overcoat end face has four groups of stepped tooths and four holes to be used for and to outreach part joining, four groups of stepped tooths are used for transmitting torque, and four holes are used to wear bolton overcoat 11 and outreach part.

Claims

1, a kind of ball cage synchronous universal transmission shaft, its sealing water device (2) is contained in the endoporus of rzeppa universal joint (1), splined shaft axle pair (25) is through in the inner splined hole that matches of cover (10) in the rzeppa universal joint vertically, between rzeppa universal joint (1) and the splined shaft axle pair (25) sealing system is arranged, it is characterized in that: described sealing system is combined by interior grease blocking cover (13) and seal closure (14), the opening subtend rzeppa universal joint (1) of interior grease blocking cover (13), and be enclosed within seal closure (14) internal surface, together be contained on the outer edge surface of overcoat (11) of rzeppa universal joint (1), seal closure (14) small end is fastened on the hub splines (21).

2, ball cage synchronous universal transmission shaft according to claim 1, it is characterized in that: rzeppa universal joint (1) is two, two rzeppa universal joints (1) split the two ends in splined shaft axle pair (25) relatively, splined shaft axle pair (25) is through vertically in the endoporus of two rzeppa universal joints (1) it is connected as a single entity, between the hub splines (21) of splined shaft axle pair (25) and the splined shaft (23) is sliding fit, slippage relatively, hub splines (21) is contained in respectively in the inner splined hole that matches of two rzeppa universal joints (1) with splined shaft (23), and ventilation mouth (17) is arranged on the splined shaft axle pair (25).

3, ball cage synchronous universal transmission shaft according to claim 1 and 2 is characterized in that: sealing water device (2) is equipped with elastomer diaphragm (3) for the ventilation waterproof construction between the vent plug body (5) of sealing water device (2) and the diaphragm seat (4).

4, ball cage synchronous universal transmission shaft according to claim 3 is characterized in that: sealing water device (2) is a scyewed joint with rzeppa universal joint (1).