JPH0632759U - Torque limiter device - Google Patents

Abstract

(57) [Abstract] [Purpose] It is configured so that the power transmissions of various work machines of a multipurpose work vehicle can be taken out from the same PTO shaft arranged in the main body, and
It is equipped with a spring type torque limiter in the middle part of the PTO shaft transmission series, and the set torque of the torque mitter can be widely used for other work purposes without significantly changing the work vehicle that is the base, and it is efficient. Be able to adapt well and have versatility. [Structure] It is configured so that transmissions of various work machines of a multipurpose work vehicle can be taken out from the same PTO shaft arranged in the main body, and
A spring type torque limiter is provided at an intermediate portion of the PTO shaft transmission system. A holder for covering the torque limiter is attached to the transmission case, and an adjusting means for advancing and retracting an outer spring receiver is attached to the holder. The length of the spring is adjusted from the outside of the holder according to the load characteristics of the work so that the set torque of the torque limiter can be adjusted.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a torque limiter device for a PTO shaft, which is an industrial vehicle such as a construction vehicle, a transportation vehicle, or an agricultural and forestry vehicle, and is used as a multipurpose work vehicle for various operations.

[0002]

[Prior art]

 Conventionally, a PTO device for an industrial vehicle such as a construction vehicle, a transportation vehicle, and an agricultural and forestry vehicle is provided with a torque limiter, and the torque limiter has a torque set so as to meet only one work load characteristic. The device is already known. In addition, when the torque limiter torque was set again to suit the load characteristics of other work, the torque limiter device was disassembled each time, and the spring for the work was often replaced and assembled for use.

[0003]

[Problems to be solved by the device]

 Even with a multipurpose work vehicle, the torque limiter device that sets the torque so as to match only the load characteristics of one work as described above has expanded the range of work used in one vehicle as recently. At times, with a torque set to a constant value, excess and deficiency often occur. Also, disassembling and assembling each time according to work, replacing the spring, and setting the required torque were laborious works.

[0004]

[Means for Solving the Problems]

 The present invention is constructed so that the power transmissions of various work machines of a multipurpose work vehicle can be taken out from the same PTO shaft arranged in the main body, and a spring type torque limiter is provided in the middle part of the PTO shaft power transmission system. The holder that covers the torque limiter is attached to the transmission case, and the holder is equipped with an adjusting means for advancing / retreating the outer spring receiver, so that the length of the spring can be adjusted from the outside of the holder according to the load characteristics of each work. The above-mentioned problem was solved by adjusting the torque and adjusting the set torque of the torque limiter.

[0005]

[Action]

 For example, when using the main body of the passenger rice transplanter as a multipurpose work vehicle such as a power sprayer or a power granulator, the PTO shaft provided in the main body of the passenger rice transplanter is used for other work as it is. The torque of the torque limiter set so as to be suitable for passenger rice transplanters has insufficient capacity, and the torque limiter cannot function. Therefore, when using it as a multi-purpose work vehicle, the holder device as a multi-purpose work vehicle is additionally replaced in advance with the torque limiter device provided in the main body of the conventional riding rice transplanter so that it can be used from outside the holder. By adjusting the length of the internal spring, it has become possible to provide versatility so that the torque set by the torque mitter can be widely adapted to other work purposes.

[0006]

【Example】

 An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a side view of a riding rice transplanter main body 1 showing an example of a multipurpose work vehicle, and has a transmission case 2 having a transmission device built in at a lower front portion thereof. There is.

Inside the transmission case 2, in addition to the transmission portion that drives the front and rear wheels, a spring receiver 4 that is spline-fitted to the tip of the transmission shaft 3 as shown in FIG. The PTO shaft 10 is driven via the clutch pawl 5 that moves forward and backward in the state, the clutch pawl 6 whose outer end meshes with the clutch pawl 5 and whose inner end meshes with the bevel gear 8, and the bevel gear 9.

Conventionally, when used as a riding rice transplanter for a single purpose, the nut 19 screwed onto the tip of the transmission shaft 3 directly receives the spring receiver 4, and the opposing clutch pawls 5 and claw pawls 6 are engaged. If the strength of the spring 7 that regulates the engagement force of the parts is constant and the load applied to the PTO shaft 10 from the working machine exceeds the set torque, the clutch claw 5 and the clutch claw 6 will not be engaged. Since it has an inclined surface in the circumferential direction, it is relatively rotated by the component force in the axial direction of the transmission torque, causing slippage along the inclined surface and disengagement, and it is impossible to transmit more torque. It was structured. When the purpose of use has diversified such that the passenger rice transplanter body 1 is used as a multipurpose work vehicle such as a power sprayer or a power granulator as recently, only the load characteristics of the rice planting work as described above can be seen. In the torque limiter device in which the torque is set so as to be suitable, the set torque is often excessive or insufficient. In addition, disassembling and assembling each time according to the work, replacing the spring 7 and setting the required torque is a troublesome work.

Therefore, by removing the cover 20 which has conventionally covered the spring receiver 4, the holder 11 shown in FIG. 2 is replaced, and a series of adjusting parts are added to the holder 11, thereby making it possible to mount the rice transplanter body as described above. No. 1 can be used as a multipurpose work vehicle such as a power sprayer and a power granulator. That is, a holder 11 that covers the torque limiter is mounted on the transmission case 2, a boss portion on the end surface of which is penetrated by a waterproof nut 13 that is waterproof with an O-ring 12, and the end surface is fitted with a hexagonal head 14 by double-sided fitting. The shaft end is locked by the snap ring 15. A bolt 16a projecting from the end of the bearing holder 16 is screwed into the inner diameter of the shaft nut 13, and the bearing holder 16 is moved back and forth in the axial direction by rotating the hexagon head 14. Since the detent pin 11a is welded from the outer periphery of the holder 11 to the position corresponding to the detent groove 11b provided at one position on the circumference of the bearing holder 16 and engages with the detent groove 11b, The bearing holder 16 always moves back and forth only in the axial direction.

A thrust bearing 17 is held inside the bearing holder 16, and the other end of the thrust bearing 17 has an inner diameter supported by a spacer 18, a side surface of which is in contact with a flange portion of the thrust bearing 17, and a flange of the spacer 18 is used to receive a spring bearing. It is in contact with 4. A hole is formed in the central portion of the spacer 18 so that the threaded portion of the shaft end of the transmission shaft 3 can pass therethrough, and as described above, the torque limiter device of the existing passenger rice transplanter main body 1 can be easily added from the shaft end. It can be installed.

Now, when the hexagon head 14 is rotated and the spacer 18 is fully advanced, the inner wall B of the spacer 18 and the stepped portion B of the shaft end of the transmission shaft 3 come into contact with each other, and the transmission torque of the torque limiter is reduced. When the hexagonal head 14 is rotated in the reverse direction and the spacer 18 is fully retracted, the stepped shoulder portion of the screw projectingly welded to the end surface of the bearing holder 16 and the inner end portion of the shaft nut 13 come into contact with each other. Therefore, the torque transmitted by the torque limiter is minimized.

The inner side of the spring receiver 4 and the outer side of the clutch pawl 5 are connected by meshing with a plurality of clutch pawls on the circumference, and are configured to rotate in the same manner. Even when the length is maximized, the mesh length is sufficient to transmit the required torque, and when the length of the spring 7 is minimized, mutual peaks and valleys do not interfere with each other. The claw portion is deeply cut and formed.

[0013]

[Effect of device]

 The present invention is configured so that the power transmissions of various work machines of a multipurpose work vehicle can be taken out from the same PTO shaft 10 arranged in the main body, and a spring type torque limiter is provided in the middle part of the PTO shaft power transmission system. The holder 11 for covering the torque limiter is attached to the transmission case 2, and the holder 11 is provided with an adjusting means for moving the outer spring receiver 4 forward and backward. From this, the length of the spring 7 is adjusted so that the set torque of the torque limiter can be adjusted, and when used as a multi-purpose work vehicle, the torque limiter device provided in advance in the main body of the work vehicle, which is the base body, By additionally replacing the holder device as a multi-purpose work vehicle, the torque set by the torque mitter can be widely used for other work purposes, and the efficiency can be improved. So as to fit it is possible to have a versatility was Tsu name so that it can.

[Brief description of drawings]

FIG. 1 is a side view of a riding rice transplanter body.

FIG. 2 is a vertical cross-sectional view of a torque limiter device.

FIG. 3 is a side view of a hexagon head and a detent portion of a bearing holder.

FIG. 4 is an exploded perspective view of a main part.

[Explanation of symbols]

 1 Passenger rice transplanter main body 3 Transmission shaft 5 Claw clutch 6 Claw clutch 7 Spring 10 PTO shaft 13 Shaft nut 18 Spacer

Claims (1)

[Scope of utility model registration request] 1. A multi-purpose work vehicle configured so that transmissions of various working machines can be taken out from the same PTO shaft 10 arranged in the main body, and a spring type torque limiter is provided at an intermediate portion of the PTO shaft transmission series. And attaching the holder 11 covering the torque limiter to the transmission case 2,
The holder 11 is equipped with an adjusting means for moving the outer spring support 4 forward and backward, and the length of the spring 7 can be adjusted from the outside of the holder 11 according to the load characteristics of each work to adjust the set torque of the torque limiter. Torque limiter device configured in.