CN200965018Y

CN200965018Y - Agricultural gimble drive shaft

Info

Publication number: CN200965018Y
Application number: CN 200620069897
Authority: CN
Inventors: 张礼钢; 何志文
Original assignee: YANCHENG WEISHI MACHINERY Co Ltd
Current assignee: YANCHENG WEISHI MACHINERY Co Ltd
Priority date: 2006-03-07
Filing date: 2006-03-07
Publication date: 2007-10-24
Anticipated expiration: 2016-03-07

Abstract

The utility model discloses an agricultural gimbal transmission shaft which includes gimbals at two ends, a flexible shaft and a sleeve pipe which are respectively connected with the gimbals at two ends, steel balls and elastic flexible sleeves; the steel balls are arranged in a radial through hole of a connecting section of the spline sleeve of the gimbals; the elastic flexible sleeve is sleeved on the external surface of the connecting section of the spline sleeve of the gimbals; the elastic flexible sleeve is provided with a cone to control the steel balls; the matching surfaces of the flexible shaft and the sleeve pipe are respectively an external hexagonal cylindrical surface and an internal hexagonal cylindrical surface, or respectively an external cylindrical surface which is uniformly provided with three convex arrises in radial direction and three internal cylindrical surfaces of the concave trough which is matched with the convex arrises; the connection between the gimbal and the flexible shaft and the sleeve pipe adopts the structure of that cylindrical surface is used for matching and the end surfaces are fixed by a key pin; a super-overload protection mechanism is arranged between a forkhead of the gimbal and the spline sleeve. The utility model has the advantages of convenient connection, high transmission efficiency, easy to improve the manufacture precision, and implementing overload protection.

Description

Agricultural Cardan shaft

Technical field

The utility model relates to a kind of transmission shaft, and especially a kind of agricultural Cardan shaft belongs to agricultural machinery technological field.

Background technique

Agricultural Cardan shaft is the farm machinery auxiliary equipment product that a kind of volume of production and marketing is big, purposes is wide, generally is used for tractor and is connected with power between the various driving agricultural machinery and implement.Existing agricultural Cardan shaft is mainly by the universal joint at two ends with form with the telescopic shaft and the sleeve pipe of two ends universal joint welding respectively.Usually, the universal joint at two ends is fixedlyed connected with the power input shaft of tractor motive power output shaft and farm machinery respectively.

The shortcoming that existing agricultural Cardan shaft exists has: the one, and adopt spline fitted with the output shaft (or input shaft) of tractor (or farm machinery), and both are fixed with latch, connect cumbersome; The 2nd, telescopic shaft and mostly adopt ordinary rectangular control to do with its sleeve pipe that slidably cooperates, matching gap is big, transmission efficiency is low, it is big to produce noise; The 3rd, universal joint has adopted welding manner with being connected of telescopic shaft and sleeve pipe, and the welding deformation of generation is big, precision is difficult to control; The 4th, no overload protection arrangement easily causes damage in case overload takes place.

Summary of the invention

Primary technical problem to be solved in the utility model is, overcomes the existing in prior technology deficiency, proposes a kind of convenient and fast connection agricultural Cardan shaft.On this basis, further purpose of the present utility model is to improve transmission efficiency, is easy to guarantee accuracy of manufacturing, and has overload protection function.

For realizing quick and convenient connection, agricultural Cardan shaft of the present utility model, comprise the universal joint at two ends, the telescopic shaft and the sleeve pipe that are connected with the two ends universal joint respectively, its technological improvement is also to comprise steel ball and elastic telescopic cover, described steel ball is arranged in the radial direction through hole of universal joint spline housing linkage section, described elastic telescopic cover is sleeved on the universal joint spline housing linkage section outer surface, and this elastic telescopic puts the conical surface that is provided with the control steel ball.

For improving transmission efficiency, reducing noise, the telescopic shaft of above-mentioned agricultural Cardan shaft of the present utility model and the fitting surface of sleeve pipe are respectively outer-hexagonal shape cylinder and interior hexagonal cylinder, or are respectively radial equipartition and the external cylindrical surface of three fins are arranged and have three inner cylindrical surfaces with the suitable groove of described fin.

Be the raising accuracy of manufacturing, above-mentioned agricultural Cardan shaft of the present utility model, the universal joint at its two ends adopts the cylndrical surface to join with being connected of telescopic shaft and sleeve pipe and is incorporated in the structure that end face is fixed with key pin.Change traditional technique for welding, can improve the grade of accuracy of product.

For realizing overload protection, above-mentioned agricultural Cardan shaft of the present utility model is provided with the overload protecting mechanism that surmounts that the inner is resisted against on the spring, the outer end withstands on jaw endoporus recess between the jaw of one end universal joint and the spline housing.When overload takes place, can play the effect of protection facility by skidding.

The utility model is when being connected with tractor, make its conical surface discharge steel ball as long as promote the elastic telescopic cover earlier, after being enclosed within universal joint spline housing linkage section on the tractor motive power output shaft and unclamping elastic telescopic cover, continue again to push ahead, in case steel ball falls into tractor motive power output shaft locking radial groove, just finished both fixedly connected, operated very simple, quick.

Compare from above-mentioned being not difficult to find out, the utlity model has substantive distinguishing features and progress, will obtain good economic benefit after product puts goods on the market with existing agricultural Cardan shaft.

Description of drawings

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

Fig. 1 is an embodiment's of the utility model a structural representation.

Fig. 2 is the A-A sectional view of Fig. 1.

Fig. 3 is the structural representation of No. 7 parts among Fig. 1.

Fig. 4 is the B-B sectional view of Fig. 3.

Fig. 5 is a kind of cross-sectional view of No. 4 and No. 5 parts among Fig. 1.

Fig. 6 is the another kind of cross-sectional view of No. 4 and No. 5 parts among Fig. 1.

Fig. 7 is the connection diagram of No. 17 parts and No. 4 parts among Fig. 1.

Fig. 8 is the left view of Fig. 7.

Fig. 9 is the another kind of connection diagram of No. 17 parts and No. 4 parts among Fig. 1.

Figure 10 is the left view of Fig. 9.

Embodiment

As shown in Figure 1, the agricultural Cardan shaft of present embodiment is mainly by the

universal joint

3,6 at two ends, and the sleeve pipe that is connected with two ends

universal joint

3,6 respectively and telescopic shaft are formed.As can be seen from Figure 2 having constituted one by radially pin 8 and spring 9 between agricultural machinery and implement jaw 2 that is connected with universal joint 3 and the spline housing 1 crosses and surmounts overload protecting mechanism; when in case torque transmission shaft surpasses load rating; pin 8 will be depressed; produce between jaw 2 and the spline housing 1 and skid, thereby play the effect of protecting facility.

From Fig. 3, Fig. 4 as can be seen, the jaw 7 spline housing linkage sections that universal joint 6 is connected with tractor radially be provided with 4 through holes, in each hole, laid 1 steel ball 11, elastic telescopic cover 10 is installed on the outer surface of spline housing linkage section, this elastic telescopic puts the conical surface that is provided with control steel ball 11, is resisted against on the steel ball 11 at this conical surface under the effect of spring 12.

As shown in Figure 5, a kind of structure of the telescopic shaft 5 of the agricultural Cardan shaft of present embodiment and sleeve pipe 4 fitting surfaces promptly is respectively outer-hexagonal shape cylinder 14 and interior hexagonal cylinder 13 (also can be other regular polygon cylinder); Fig. 6 is the another kind of structure of the fitting surface of telescopic transmission shaft axle 5 and sleeve pipe 4, promptly is respectively external cylindrical surface 15 that radial equipartition has three (get final product at least two) fins and has three inner cylindrical surfaces 16 with the suitable groove of described fin.

As the agricultural Cardan shaft of Fig. 7, present embodiment shown in Figure 8, the universal joint jaw 17 at its two ends and the Placement of sleeve pipe 4 adopt the cylndrical surface to cooperate, and the structure of with 4 screws 18 both being fixed at end face.Compare with traditional technique for welding, do not have the welding distortion, can improve the grade of accuracy of product.

Fig. 9, shown in Figure 10 be another kind of joint jaw 17 and the Placement of sleeve pipe 4, with the difference of above-mentioned Placement only be with straight pin 19 instead of screws 18, and in the termination of straight pin 19, with itself and jaw 17 and sleeve pipe 4 spot welding.

In addition to the implementation, the utility model can also have other mode of executions, and all employings are equal to the technological scheme of replacement or equivalent transformation formation, all drop on the protection domain of the utility model requirement.

Claims

1. agricultural Cardan shaft, comprise the universal joint at two ends, the telescopic shaft and the sleeve pipe that are connected with the two ends universal joint respectively, it is characterized in that: also comprise steel ball and elastic telescopic cover, described steel ball is arranged in the radial direction through hole of universal joint spline housing linkage section, described elastic telescopic cover is sleeved on the universal joint spline housing linkage section outer surface, and this elastic telescopic puts the conical surface that is provided with the control steel ball.

2. according to the described agricultural Cardan shaft of claim 1, it is characterized in that: the fitting surface of described telescopic shaft and sleeve pipe is respectively outer regular polygon cylinder and internal regular polygon cylinder.

3. according to the described agricultural Cardan shaft of claim 1, it is characterized in that: the fitting surface of described telescopic shaft and sleeve pipe is respectively radial equipartition to be had the external cylindrical surface of at least two fins and has inner cylindrical surface with the suitable groove of described fin.

4, according to claim 2 or 3 described agricultural Cardan shafts, it is characterized in that: the universal joint at described two ends adopts the cylndrical surface to join with being connected of telescopic shaft and sleeve pipe and is incorporated in the structure that end face is fixed with key pin.

5, according to the described agricultural Cardan shaft of claim 4, it is characterized in that: be provided with the overload protecting mechanism that surmounts that the inner is resisted against on the spring, the outer end withstands on jaw endoporus recess between the jaw of an end universal joint and the spline housing.