KR20110040612A

KR20110040612A - Multi shaft

Info

Publication number: KR20110040612A
Application number: KR1020090118434A
Authority: KR
Inventors: 신명규
Original assignee: 신명규
Priority date: 2009-10-12
Filing date: 2009-12-02
Publication date: 2011-04-20

Abstract

The present invention relates to a multi-shaft for agricultural machinery of a novel structure that can improve the strength and bending angle.

Among the joint parts D provided in the multi-shaft for agricultural machinery according to the present invention, at least one side of the joint part D may be formed of a constant velocity ball joint 70 having a large bending angle, thereby improving the bending angle of the multi shaft. The shaft body C of the multishaft includes a locking jaw 53 that is caught by an outer end 71d of the coupling hole 71a formed in the support 71 of the constant velocity ball joint 70, and an inner side of the support 71. It is fixed to the support 71 by the snap ring 75 applied to the end 71e, which has the advantage of improving the strength of the multishaft.

Description

Multi Shaft for Farm Machinery

In general, agricultural machinery used in connection with a self-propelled power unit that is equipped with an engine such as a tractor or cultivator to be movable by magnetic force, as shown in Figure 1, a link or connection to the rear of the self-propelled power unit (A) It is directionally connected to the pin and moves along the self-propelled power unit A. At this time, the agricultural machine (B) is configured to be directly connected to the engine provided in the self-propelled power unit (A) by a multi-shaft or connected to the engine via a PTO can be operated by the engine power.

And, as shown in Figure 2, the multi-shaft, the shaft body (C) configured to be stretchable, and the drive shaft (10) provided at both ends of the shaft body (C), respectively provided in the self-propelled power unit (A) And a pair of joints D connected to the driven shaft 20 provided in the agricultural machine B, respectively. At this time, the joint portion (D) is a self-powered power unit (A) direction by using a universal joint (60) is configured to be coupled to the cross-shaped bearing (61) so that a pair of yokes (62) at right angles to each other Even when the self-propelled power unit (A) and the agricultural machine (B) direction is not matched with each other to continuously transfer power to the agricultural machine (B), it is possible to continue to work.

On the other hand, the universal joint 60 used in such a multi-shaft for agricultural machinery has the advantage of simple structure and high strength, but has a disadvantage of small bending angle.

By the way, since the tractor or tiller changes the direction to draw a very small radius, the joint portion (D) is often bent at a very large angle, in particular, the joint portion so as to exceed the limit angle range of the universal joint (60) A large number of cases (D) are bent, and the universal joint 60 is frequently damaged, and accordingly, there is a problem in that the entire multishaft including the joint part D must be frequently replaced.

In this case, in order to solve this problem, it may be considered to replace the universal joint 60 of the joint portion D with a constant velocity joint 70, which is often used in a vehicle. As shown in FIG. 3, the constant velocity ball joint 70 is coupled to the support body 71 to which the shaft body C is connected, and to the outside of the support body 71, and at one side of the support body 71. A housing 72 having the exposed opening 72a, a plurality of traction balls 73 provided between the support 71 and the housing 72, and a traction ball 73 coupled to the traction ball 73. It consists of a retainer (74) for supporting the 73, the traction ball (71b, 72b) is inserted into the circumferential surface of the support 71 and the inner peripheral surface of the housing 72 is guided Is formed, the support 71 is formed with a coupling hole 71a to which the fixed shaft 50 formed at one end of the shaft body C is fitted. In addition, concave grooves 51 and 71c into which the snap ring 75 is fitted are formed on the inner circumferential surface of the coupling hole 71a and the circumferential surface of the fixed shaft 50. Therefore, as shown in FIG. 4, the snap ring 75 is inserted into the concave groove 51 of the coupling hole 71 a, and then the fixed shaft 50 of the shaft body C is pushed into the coupling hole 71 a. When the snap ring 75 is opened to the outside by the fixed shaft 50, the snap ring 75 is tightened when the fixed shaft 50 is fully inserted to the concave groove (71c) and the coupling hole of the fixed shaft (50) The fixed shaft 50 is fixed so as not to be pulled out of the coupling hole 71a by being caught by the concave groove 51 of the 71a.

Since the constant velocity ball joint 70 has a larger bending angle than the universal joint 60, the multi-shaft can smoothly transmit power even when the multi shaft is bent at a large angle, and thus is mainly used for propeller shafts of all-wheel drive vehicles.

However, unlike the propeller shaft of a vehicle in which the constant velocity ball joint 70 is used, the shaft body C connecting the agricultural machine B and the self-propelled power unit A generates a strong load or impact in the axial direction. . However, since the size of the snap ring 75 is limited to fit into the recesses 51 and 71c of the support 71 and the fixed shaft 50, the snap ring 75 is weak to a load or an impact applied to the shaft body C. . Therefore, there is a very high possibility that the snap ring 75 is damaged or detached by the load or the impact generated during the operation of the agricultural machine B, and the fixed shaft 50 is pulled out of the support 71. In particular, since the load acting in the direction in which the shaft body C extends or contracts is applied to the snap ring 75, the snap ring 75 is damaged more quickly.

Therefore, there is a need for a new multi-shaft for agricultural machinery that can improve the strength and rotation angle.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a multi-shaft for agricultural machinery with a new structure that can improve the strength and bending angle.

The present invention for achieving the above object, the shaft body (C) is stretched in the longitudinal direction, the drive shaft 10 and agricultural machinery provided on both ends of the shaft body (C), respectively provided in the self-propelled power unit (A) In the multi-shaft for agricultural machinery comprising a pair of joints (D) connected to the driven shaft (20) provided in (B), respectively.

The joint part D of at least one side of the joint part D includes a support 71 formed such that a coupling hole 71a through which the shaft body C is fitted is penetrated through a central part thereof, and the support 71 of the support part 71. A housing 72 having an opening 72a coupled to an outside and exposed at one side of the support 71, and a plurality of traction balls 73 provided between the support 71 and the housing 72. And a constant velocity joint 70 coupled to the traction ball 73 and including a retainer 74 supporting the traction ball 73.

An end of the shaft body (C) is provided with a fixed shaft 50 is inserted into the coupling hole (71a) protruding to the inner end (71e) of the support 71, the fixed shaft (50) A locking jaw 53 is formed to be caught by the outer end 71d of the support 71, and the fixed shaft 50 is not caught by the inner end 71e of the support 71 at the distal end of the fixed shaft 50. The fixing member is fixed so that the fixing member is coupled to each other, and a through hole 72c is formed at one side of the housing 72 to allow the fixing member to pass therethrough.

According to another feature of the invention, the joint portion (D) of one side is composed of a constant velocity ball joint 70, the joint portion (D) of the other side is a multi-shaft for agricultural machinery, characterized in that composed of a universal joint (60) Is provided.

According to another feature of the invention, the fixing member is made of a snap ring 76a coupled to the circumference of the fixed shaft 50, the snap ring 76a is coupled to the circumference of the fixed shaft 50 It is provided with a multi-shaft for agricultural machinery, characterized in that the coupling groove 52 is formed.

According to another feature of the invention, the fixing member is made of a nut (76b) screwed to the front end of the fixed shaft 50, the nut 76b is formed on the peripheral surface of the front end of the fixed shaft (50) Provided is a multi-shaft for agricultural machinery, characterized in that the thread 54 is coupled to be formed.

Among the joint parts D provided in the multi-shaft for agricultural machinery according to the present invention, at least one side of the joint part D may be formed of a constant velocity ball joint 70 having a large bending angle, thereby improving the bending angle of the multi shaft. The shaft body C of the multishaft includes a locking jaw 53 that is caught by the outer end 71d of the coupling hole 71a formed in the support 71 of the constant velocity ball joint 70 and the coupling hole 71a. There is an advantage that can be fixed to the support 71 by the fixing member that is caught on the inner end (71e) to improve the strength.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

5 to 7, the multi-shaft for agricultural machinery according to the present invention is provided on both ends of the shaft body (C) and the shaft body (C) is stretched in the longitudinal direction, respectively provided in the self-propelled power unit (A) It is the same as the conventional one composed of a pair of joints D connected to the drive shaft 10 and the driven shaft 20 provided in the agricultural machine B. At this time, the shaft body (C) consists of the inner tube 30 and the outer body 40 splined to the outside of the inner tube 30, it can be stretched and stretched in the longitudinal direction of each other.

In addition, according to the present invention, the joint part D of one side of the joint part D is made of a universal joint 60, and the joint part D of the other side is made of a constant velocity joint 70.

Since the structure of the universal joint 60 is the same as that provided in the conventional multishaft, a detailed description thereof will be omitted.

The constant velocity ball joint 70 is a support 71 formed so that the coupling hole 71a to which the shaft body C is fitted and penetrates a central portion thereof is coupled to the outside of the support 71 and at one side of the support 71. A housing 72 having an opening 72a at which one side of the 71 is exposed, a plurality of traction balls 73 provided between the support 71 and the housing 72, and the traction ball 73. It is made of a retainer 74 is coupled to the traction ball 73 to support, the traction groove (73b) is inserted into the traction ball 73 is guided to the circumferential surface of the support 71 and the inner circumferential surface of the housing (72) 72b) is formed.

At this time, both side surfaces of the support 71 are divided into an outer end 71d exposed to the outside of the housing 72 through the opening 72a and an inner end 71e facing the inside of the housing 72. The coupling hole 71a is formed so that both ends thereof open toward the outer end 71d and the inner end 71e.

In addition, one end of the shaft body (C) is provided with a fixed shaft 50, the front end is fitted into the coupling hole (71a). As shown in FIG. 7, the fixed shaft 50 is inserted into the coupling hole 71a from the outer end 71d of the support 71 so that the front end portion is the inner end 71e of the support 71. It is installed so as to protrude, the locking jaw 53 is formed in the middle portion to be caught on the outer end (71d) of the support (71). At this time, the spline is formed on the peripheral surface of the front end portion of the fixed shaft 50 is configured such that the fixed shaft 50 is engaged with the coupling hole (71a).

And, the front end portion of the fixed shaft 50 is coupled to the fixing member that is caught on the inner end (71e) of the support (71). The fixing member is made of a snap ring (76a), for this purpose, the engaging groove 52 is formed on the outer peripheral surface of the front end of the fixed shaft (50).

In addition, a through hole 72c through which the snap ring 76a passes is formed at one side of the housing 72, more specifically, at an opposite side to the position where the opening 72a is formed.

Therefore, as shown in (a) and (b) of FIG. 7, the fixed shaft 50 of the shaft body C is fitted into the coupling hole 71a of the support 71 to engage the fixed shaft 50. After the jaw 53 is caught by the outer end 71d of the coupling hole 71a, a snap ring 76a is inserted into the housing 72 through the through hole 72c to fix the shaft 50. By coupling and fastening the snap ring 76a, the shaft body C can be fixed to the support 71.

Reference numerals 63 and 77 which are not described are provided in the housing 72 of the universal joint 60 and the constant velocity ball joint 70, respectively, and the universal joint 60 and the constant velocity joint 70 are self-propelled power units ( The connector which connects to the drive shaft 10 provided in A) and the driven shaft 20 provided in the agricultural machine B is shown. At this time, the connector 77 provided in the housing 72 of the constant velocity ball joint 70 has a connection hole 77a connected to the through hole 72c so as to penetrate a central portion thereof, and thus the connection hole 77a. ) And the snap ring 76a may be inserted into the housing 72 through the through hole 72c. Therefore, by connecting the universal joint 60 to the drive shaft 10 of the self-propelled power unit (A), and by connecting the constant velocity ball joint 70 to the driven shaft 20 of the agricultural machine (B), self-propelled power unit ( A) and agricultural machinery (B) can be interconnected.

The multishaft configured as described above is composed of a constant velocity ball joint 70 having a large bending angle of the joint portion D on one side, and the joint portion D of the other side is composed of a universal joint 60 having a simple structure, and thus the structure is complicated. There is an advantage that can be secured enough bending angle while preventing deterioration.

In addition, the multishaft is provided with a fixed shaft 50 coupled to the support 71 of the constant velocity ball joint 70, the fixed shaft 50 is provided with a locking jaw 53 and a fixing member support 71 Are fixed to the inner end 71e and the outer end 71d. Therefore, since the load generated in the longitudinal direction of the multi-shaft when the self-propelled power unit A is switched or during the operation of the agricultural machine B is distributed to the locking jaw 53 and the fixing member, the load applied to the fixing member is reduced. There is an advantage that can extend the life of the fixing member. Since the fixing member is caught by the inner end 71e of the coupling hole 71a of the support 71, unlike the conventional snap ring 75 is limited in size so that the fixing member can be inserted into the concave grooves 51 and 71c. And can be freely selected, there is an advantage that can further improve the strength.

In particular, the fixing member is made of a snap ring 76a, it is coupled to fit in the concave groove 51 formed in the fixed shaft 50, there is an advantage that the operation of fixing the fixing member is very simple.

In this embodiment, by connecting the universal joint 60 to the drive shaft 10 of the self-propelled power unit (A), by connecting the constant velocity ball joint 70 to the driven shaft 20 of the agricultural machine (B), self-propelled Although it is illustrated that the power unit (A) and the agricultural machine (B) are interconnected, if necessary, the universal joint 60 is connected to the driven shaft (20) of the agricultural machine (B), the constant velocity joint (70) It is also possible to connect to the drive shaft 10 of the self-propelled power unit (A).

In addition, although the connector 77 provided in the constant velocity ball joint 70 is illustrated to be welded to the end of the housing 72, as shown in FIG. 8, the constant velocity joint 70 as necessary. It is also possible to fix the connector (77) provided in the above to the housing (72) with a bolt (77b).

In addition, the joint part D of one side of the joint part D is made of a universal joint 60, and the joint part D of the other side is illustrated as being made of a constant velocity ball joint 70. It is also possible to comprise the joint portions D at both ends with the constant velocity ball joint 70.

Figure 9 shows another embodiment according to the present invention, the fixing member is made of a nut (76b), the threaded portion 54 is coupled to the nut 76b to the peripheral surface of the front end of the fixed shaft (50) ) Is formed. To this end, an end portion 55 of the fixed shaft 50 is provided with an extension 55 having a smaller diameter than the fixed shaft 50, and the thread 54 is formed on the circumferential surface of the extension 55. After inserting the 50 into the coupling hole 71a, the fixed shaft 50 may be fixed by coupling the nut 76b to the extension part 55.

The multishaft configured as described above is composed of the nut (76b), the fixing member can be screwed to the fixed shaft (50) and tightened, it is fitted into the coupling groove (52) of the fixed shaft (50) of the support (71) Unlike the snap ring 71e of the first embodiment, which is hard to be completely adhered to the inner end 71e, the locking jaw 53 and the fixing member 76 of the fixed shaft 50 have an outer end 71d of the support 71. ) And the inner end 71e. Therefore, the fixed shaft 50 is prevented from being shocked by swinging back and forth in the state coupled to the coupling hole 71a, thereby extending the life of the fixing member.

1 is a reference diagram showing an installation state of a conventional multi-shaft for agricultural machinery,

Figure 2 is a side cross-sectional view showing a conventional multi-shaft for agricultural machinery,

3 is a reference diagram showing a modification of the conventional multi-shaft for agricultural machinery,

Figure 4 is a reference diagram showing a conventional method for assembling a multi-shaft for agricultural machinery,

5 is a reference diagram showing the installation state of the multi-shaft for agricultural machinery according to the present invention,

Figure 6 is a side cross-sectional view of a multi-shaft for agricultural machinery according to the present invention,

7 is a reference diagram showing a method of assembling a multi-shaft for agricultural machinery according to the present invention,

8 is a reference diagram showing another embodiment of the multi-shaft for agricultural machinery according to the present invention,

9 is a reference diagram showing another embodiment of a multi-shaft for agricultural machinery according to the present invention.

Claims

The shaft main body (C) is stretched in the longitudinal direction, and the drive shaft (10) provided on both ends of the shaft body (C) provided in the self-propelled power unit (A) and the agricultural machine (B), respectively In the multi-shaft for agricultural machinery comprising a pair of joints (D) connected to each.

An end of the shaft body (C) is provided with a fixed shaft 50 is inserted into the coupling hole (71a) protruding to the inner end (71e) of the support 71, the fixed shaft (50) A locking jaw 53 is formed to be caught by the outer end 71d of the support 71, and the fixed shaft 50 is not caught by the inner end 71e of the support 71 at the distal end of the fixed shaft 50. The fixing member is fixed so as not to be coupled, one side of the housing 72, the shaft for agricultural machinery, characterized in that the through-hole 72c is formed so that the fixing member can pass.

The multishaft for agricultural machinery according to claim 1, wherein the joint part (D) on one side is composed of a constant velocity ball joint (70), and the joint part (D) on the other side is composed of a universal joint (60).

According to claim 1, wherein the fixing member is made of a snap ring (76a) coupled to the circumference of the fixed shaft 50, the coupling groove to which the snap ring 76a is coupled to the circumference of the fixed shaft (50) Multi-shaft for agricultural machinery, characterized in that 52 is formed.

According to claim 1, wherein the fixing member is made of a nut (76b) that is screwed to the front end of the fixed shaft 50, the screw thread to which the nut 76b is coupled to the peripheral surface of the front end of the fixed shaft (50) Multi-shaft for agricultural machinery, characterized in that 54 is formed.