JPH0810256Y2 - Torque limiter device for scraping and conveying device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a scraping / conveying device mounted on a combine or the like, and more particularly to a structure of a torque limiter device used in the scraping / conveying device.

(B) Conventional technology Conventionally, this type of torque limiter device has a joint surface that is crimped by a spring, and when normal torque is transmitted, torque is transmitted by the frictional force of the joint surface and when overload is applied. The joint surface slips and interrupts torque transmission. Further, the transmission torque capacity is adjusted by adjusting the spring pressure with an adjusting means such as a bolt.

(C) Problems to be Solved by the Invention For this reason, the torque limiter device described above is difficult to assemble due to excessive spring pressure, and the device itself becomes large in size. Is difficult and must be provided at the transmission input source.
Further, the operating torque becomes excessively large, and the drive shaft and the like have become unnecessarily large. Along with that, the weight and the like of the entire scraping and conveying device have become large.

Therefore, the present invention has an object to provide a torque limiter device in a take-in transfer device, which is configured to reduce the size of the torque limiter device and prevent the operating torque from becoming excessively large, thereby solving the above-mentioned problems. is there.

(D) Means for Solving the Problems The present invention has been made in view of the above circumstances, and
For example, referring to FIGS. 1 and 3, the drive unit (1
In the take-in / conveying device (1) in which the rotation from 9) is transmitted to the take-in / conveying member (5) through the gear (17) and the shaft (6), one end of the shaft (6) has a first Of the first collar (16) is non-rotatably and axially displaceable, and the second collar (16 ') is non-rotatably and axially movably connected. , The gear (17) is relatively rotatably sandwiched between the first (16) and the second collar (16 '),
6 ') and the side surface of the gear (17) transmit torque and slide when overloaded, and an adjusting nut (42) is screwed to the other end of the shaft (6) to A sleeve means (25, 3) is provided between the adjusting nut (42) and the second collar (16 ') so as to surround the shaft (6).
7), the frictional force between the collar (16, 16 ') and the gear (17) is adjusted by the adjusting nut (42).

(E) Action Based on the above-described configuration, the rotation from the drive unit (19) is transmitted to the gear (17), but the first collar (16) and the first collar (16) are arranged so as to sandwich the gear (17) so as to be relatively rotatable. 2 colors (1
Since 6 ') are adjacently and non-rotatably connected to the shaft (6), friction force between the first collar (16) and the second collar (16') and the side surface of the gear (17) Torque is transmitted to the shaft (6).

On the other hand, at the time of overload, the rotation from the drive unit (19) is transmitted to the gear (17), but the first collar (16) and the second collar (16 ') and the side surface of the gear (17) slip. Therefore, the torque is not transmitted to the shaft (6).

Further, the torque adjustment of the torque limiter device (7) is performed by adjusting the first collar (16) and the second collar (16 ') and the gear (1).
This is done by adjusting the frictional force with the side of 7).
When the adjusting nut (42) screwed to one end of the shaft (6) is tightened, the second collar (16 ') is pressed downward in FIG. 1 through the sleeve means (37, 25) and the shaft ( Press the first collar 16 upwards via 6). As a result, the first color (16) and the second color (16 ')
The frictional force between the gear and the side surface of the gear (17) increases, and the operating torque is adjusted to a high level.

On the other hand, when the adjusting nut (42) is loosened, the sleeve means (25, 37), the second collar (16 '), the gear (17) and the first collar (16) move in the axial direction of the shaft (6). Be relaxed to. As a result, the frictional force between the first collar (16) and the second collar (16 ') and the side surface of the gear (17) is reduced, and the operating torque is adjusted to be low.

(F) Effect of the Invention As described above, according to the present invention, the torque limiter device (7) includes the first collar (16) and the second collar (16 ') and the side surface of the gear (17). The torque limiter device (7) has a simple structure because it transmits torque by frictional force and slides when overloaded.
Can be miniaturized and provided at the end of the transmission. For this reason, since the operating torque can be set to the minimum necessary torque of only the scraping conveyor device (1), the size of the drive shaft, that is, the shaft (6) can be reduced, and the entire scraping conveyor device (1). It is possible to reduce the weight, the number of parts, the cost, and the like.

Further, since the torque limiter device (7) can be provided by the scraping and conveying device (1) alone, it becomes extremely easy to manage the operating torque of the torque limiter device (7). Furthermore, since the adjusting nut (42) is provided at one end of the shaft (6), the operating torque can be adjusted more easily.

The reference numerals in parentheses refer to the drawings and do not limit the configuration in any way.

(G) Embodiment An embodiment according to the present invention will be described below with reference to the drawings.

As shown in FIG. 3, the combine has a scraping / conveying device 1 in front of the machine body, and the scraping / conveying device 1 comprises star wheels 2, 2'and scraping belts 3, 3 '. A scraping conveying member 5, a shaft 6 for transmitting power to the scraping conveying member 5,
Further, a torque limiter device 7 for controlling the operating torque of the shaft 6 is provided.

A pulley 9 is inserted and fitted on the upper portion of the shaft 6, and the take-in belt 3 is wound between the pulley 9 and the pulley 10 at the tip. The pulleys 9 and 10 and the take-in belt 3 are covered with a take-up cover 11.

The other star wheel 2'is engaged with the star wheel 2, and the star wheel 2'is configured to follow the rotation of the star wheel 2. The rotation of the star wheel is caused by the pulley 9'through the shaft 12.
The rotation of the pulley 9'is transmitted to the other take-in belt 3'wound between the pulley 9'and the pulley 10 '. The pulleys 9 ', 10' and the take-in belt 3'include a take-in cover 11 '.
Covered by

The scraping / conveying device 1 is configured to scrape the grain stalks by the scraping belts 3, 3'and convey the grain stalks by the star wheels 2, 2 '.

Further, the torque limiter device 7 is shown in FIGS.
As shown in the figure, it is arranged on the shaft 6. The lower portion of the shaft 6 is a spline portion 6a, and a snap ring groove 6b is provided at the lower end of the spline portion 6a. Further, the shaft 6 has a key groove 6 on one side in the center.
c, it has a stepped portion 6d on the upper portion and a screw portion 6e on the upper end.

A snap ring 15 is fitted in the snap ring groove 6b and abuts on the upper surface of the snap ring 15 to make the first ring.
The collar 16 is inserted into the shaft 6 so that the spline portion is
It is fitted to 6a. The first collar 16 comprises a boss portion 16a and a collar portion 16b, and a pressure bonding surface portion 16c is provided on the upper surface of the collar portion 16b.
There is a hole 16d in the inner peripheral portion of the crimping surface portion 16c. A spline hole 16e that fits with the spline portion 6a of the shaft 6 is formed through the inner periphery of the boss portion 16a. The first collar 16 cannot rotate on the shaft 6 due to the spline hole 16e. It is connected so as to be movable in the axial direction.

A worm wheel gear 17 is inserted into the shaft 6 so as to come into contact with the upper surface of the first collar 16. The worm wheel gear 17 has a through hole 17a in the center, a groove 17b provided in the peripheral wall of the through hole 17a, an upper crimping surface portion 17c on the upper surface, and an upper crimping surface portion.
An upper space portion 17d provided around the inner circumference of 17c, a concave hole 17e on the lower surface,
Lower crimping surface portion 17f which is an end surface portion of the recessed hole 17e, the lower crimping surface portion
It has a lower space portion 17g provided around the inner circumference of 17f. The boss portion 16a of the first collar 16 is fitted in the through hole 17a, and the collar portion 16b of the first collar 16 is fitted in the recessed hole 17e. Lower crimp surface
17f is in surface contact with the crimping surface portion 16c of the first collar 16.

The second collar 16 'is inserted into the shaft 6 by contacting the upper surface of the worm wheel gear 17, and the spline portion
6a, the second collar 16 'has the same shape as the first collar 16. Therefore, the second color
16 'is connected to the shaft 6 by a spline hole 16e so that it cannot rotate but can move in the axial direction. The second collar 16 'is provided in the through hole 17a of the worm wheel gear 17.
The worm wheel gear 1
The upper crimping surface portion 17c of the 7 is in surface contact with the crimping surface portion 16c of the second collar 16 '. As a result, the worm wheel gear 17 is relatively rotatably sandwiched between the first collar 16 and the second collar 16 ', and the friction force between the collars 16 and 16' and the side surface of the worm wheel gear 17 is increased. It transmits torque and slides when overloaded.

Also, the holes 16 of the first collar 16 and the second collar 16 'are
d, 16d, the groove 17b of the gear 17, and the space portions 17d, 17g are arranged on the same circumference.

A worm 19 meshes with the worm wheel gear 17, and the worm gear 19 is fitted to a transmission shaft 22 via a key 20.

Further, the bearing 23 and the sleeve 25 are inserted into the shaft 6 by coming into contact with the upper surface of the second collar 16 '. The bearing 23, the first collar 16, the worm wheel gear
A transmission case 26 is arranged so as to cover the 17, the second collar 16 'and the worm 19. Further, a pedestal 27 is arranged so as to surround the shaft 23 so as to surround the bearing 23 and the sleeve 25. The pedestal 27 abuts and holds the bearing, so that the upper end surface portion 27a is provided at the upper part of the rising portion. The lower end surface portion 27b is provided at the lower part of the rising portion, and the lower end surface portion 27b
Is supported by the bearing 23. The pedestal 27 is fixed to the transmission case 26 by bolts 29 and washers 30 and 31, and the pedestal 27 is provided with an oil filler plug 32 above the worm gear 19. The transmission case 26 is filled with lubricating oil.

Further, the bearing 33 is inserted into the shaft 6 by contacting the upper end of the sleeve 25 and the upper end surface portion 27a of the pedestal 27. On the other hand, a key 35 is fitted in the key groove 6c of the shaft 6. A bracket 36 abuts on the upper surface of the bearing 33 and is inserted into and fitted to the shaft 6 via the key 35, and the bracket 36 is connected to the shaft 6 so as not to rotate but movable in the axial direction. The bracket
The star wheel 2 is fixed to the 36.

Further, the sleeve 37 is brought into contact with the upper end of the bracket 36.
Is inserted in the shaft 6, and the pulley 9 is inserted in and fitted to the shaft 6 by abutting on the upper end of the sleeve 37. The pulley 9 is connected to the shaft 6 so as not to rotate and to move in the axial direction. Has been done.

In addition, the pulley 9 is brought into contact with the upper end of the boss portion to make a flat spring.
39 is inserted through the shaft 6, and a space 40 is formed between the flat spring 39 and the stepped portion 6d of the shaft 6. A sleeve 41 is inserted into the shaft 6 by coming into contact with the upper surface of the flat spring 30. The adjusting nuts 42, 42 are screwed onto the threaded portion 6e of the shaft 6 so as to come into contact with the upper end of the sleeve 41.

Further, as shown in FIG. 3, a hole is formed in the central portion of the pulley 9 of the take-in cover 11, and the screw portion 6e of the shaft 6 and the adjusting nuts 42, 42 project from the hole.

Since the present embodiment is configured as described above, the transmission shaft 22
Is further transmitted to the worm wheel gear 17 via the worm gear 19. The worm wheel gear 17
Is rotatable on the shaft 6, the rotation of the worm wheel gear 17 is controlled by the lower crimping surface portion 17f of the worm wheel gear 17 and the crimping surface portion 16c of the adjacent first collar 16.
Is transmitted to the first collar 16 by the frictional force of. Furthermore,
The rotation of the worm wheel gear 17 is caused by the upper crimping surface portion 17c of the worm wheel gear 17 and the adjacent second collar 16 '.
It is transmitted to the second collar 16 'by the frictional force of the crimping surface portion 16c. On the other hand, since the spline holes 16e, 16e of the first collar 16 and the second collar 16 'and the spline portion 6a of the shaft 6 are fitted to each other, the rotation of the worm wheel gear 17 causes the rotation of the first collar 16 and the first collar 16'. It is transmitted to the shaft 6 via the two collars 16 '.

On the other hand, at the time of overload, the rotation from the transmission shaft 22 is transmitted to the worm wheel gear 17 via the worm gear 19. The rotation of the worm wheel gear 17 is not transmitted to the first collar 16 because the lower crimping surface portion 17f of the worm wheel gear 17 and the crimping surface portion 16c of the first collar 16 slide.
Further, the rotation of the worm wheel gear 17 is not transmitted to the second collar 16 'because the upper crimping surface portion 17c of the worm wheel gear 17 and the crimping surface portion 16c of the second collar 16' slide. As a result, at the time of overload, the rotation of the worm wheel gear 17 is not transmitted to the shaft 6.

Further, when the adjusting nuts 42, 42 are tightened, the sleeve 41 abutting on the adjusting nut 42 moves downward in conjunction with it. The flat spring 39 contacting the sleeve 41 includes a boss portion of the pulley 9, a sleeve 37, a bracket 36, an inner race of the bearing 33, a sleeve 25, an inner race of the bearing 23, a second collar 16 ′, a worm wheel gear 17, First
Since it abuts on the snap ring 15 via the collar 16, the downward movement is blocked, and the downward movement of the sleeve 41 further compresses the sleeve 41. The increase in the compression force of the flat spring 39 simultaneously increases the force for pulling up the shaft 6 to increase the pulley 9, the sleeve 37, the bracket 36, the inner race of the bearing 33, the sleeve 25, and the bearing 23.
Increase the compressive force between the inner race, the second collar 16 ', the worm wheel gear 17, and the first collar 16. As a result, the frictional force between the lower crimping surface portion 17f of the worm wheel gear 17 and the crimping surface portion 16c of the first collar 16 and the frictional force between the upper crimping surface portion 17c of the worm wheel gear 17 and the crimping surface portion 16c of the second collar 16 '. , The operating torque is adjusted higher. At this time, the first and second collars 16,1
The pressure of 6'and the worm wheel gear 17 is
It is carried by the pulling force of and the compressive force of the sleeves 37 and 25,
It does not act on the case member 27 or the like.

On the other hand, when the adjusting nuts 42, 42 are loosened, the sleeve 41 moves upward in conjunction with the loosening of the adjusting spring 42, the loose spring 39 is relaxed, and the compression force thereof is reduced. The decrease in the compression force of the flat spring 39 simultaneously decreases the force for pulling the shaft 6 upward, and the pulley 9, the sleeve 37, the bracket 36, the bearing 33, the sleeve 25, the bearing 23, and the second collar 1
Reduces the compressive force between 6 ', worm wheel gear 17, and first collar 16. As a result, the friction force between the lower crimping surface portion 17f of the worm wheel gear 17 and the crimping surface portion 16c of the first collar 16, and the upper crimping surface portion 17c of the worm wheel gear 17.
Since the frictional force of the crimping surface portion 16c of the second collar 16 'is reduced, the operating torque is adjusted to be low.

Further, since the torque limiter device 7 is configured to transmit torque by the frictional force between the first collar 16 and the second collar 16 'and the side surface of the worm wheel gear 17, and to slide when overloaded, Its structure is simple. Therefore, it is possible to downsize the torque limiter device 7 and provide the torque limiter device 7 at the end portion of the transmission device, and it is possible to provide the torque limiter device 7 by the scraping conveyance device 1 alone. Further, since the operating torque can be set to the necessary minimum torque of only the scraping and conveying device 1, the size of the drive shaft, that is, the shaft 6 can be reduced.

Further, since the torque limiter device 7 can be provided by the scraping and conveying device 1 alone, management of the operating torque of the torque limiter device 7 becomes extremely easy. Further, the sliding type torque limiter provided inside the transmission case 26 can be easily adjusted outside the transmission case 26, and the adjusting nuts 42, 42 are screwed onto the upper end of the shaft 6 and protrude from the hole of the scraping cover 11. Since it is visible, the operating torque can be adjusted more easily.

Also, the transmission case 26 is filled with lubricating oil, and since the side surfaces of the worm wheel gear 17 and the collars 16 and 16 'slide in the lubricating oil when overloaded, seizures etc. Does not occur.

In addition, in general, the crimp surface tends to warp if it becomes the outer peripheral part,
Since the pressure is applied at the inner peripheral portion, the operating torque becomes unstable, and the contact area becomes small, causing seizure. The worm wheel gear 17 has an upper crimping surface portion 17c.
The upper space portion 17d and the lower pressure bonding surface portion 17f that are provided around the inner peripheral surface of the
Since there is a lower space portion 17g provided around the inner circumference of the above, the inner circumference portions do not contact each other, and the space portions 17d and 17g also serve as oil sumps. Therefore, the operating torque is stable, seizure does not occur, and the worm wheel gear 17 and the collar adjacent to it
The durability of 16,16 'can be improved.

Further, since the worm wheel gear 17 has a recessed hole 17e in the lower surface, and the collar portion 16b of the first collar 16 is fitted in the recessed hole 17e, the worm wheel gear 17 and the first collar
The assembly of 16 is compact, and the torque limiter device 7 of this embodiment can be adopted without largely changing the transmission case and the related position of the conventional product.

Also, the collars 16, 16 'on both ends of the worm wheel gear 17
Since they have the same shape, there is little slippage or torque difference between the upper crimping surface portion 17c and the lower crimping surface portion 17f of the worm wheel gear 17, and a stable operating torque can be obtained. In addition, the through hole 17a in the center of the worm wheel gear 17 has a first
Boss 16a of collar 16 and boss 1 of second collar 16 '
6a is fitted, and spline holes 16e, 16e for driving the shaft 6 are formed through the inner periphery of the boss portions 16a, 16a, so that the worm wheel gear 17 does not fall over and stable rotation is achieved. As a result, it is possible to prevent galling and damage of the worm wheel gear 17, the worm gear 19, and the like.

Further, the worm wheel gear 17 has spaces 17d and 17g and grooves 17b, the collars 16 and 16 'have holes 16d and 16d, and the spaces 17d and 17g of the worm wheel gear 17 and the grooves 17b, and The holes 16d, 16d of the collars 16, 16 'are arranged on the same circumference. Therefore, the lubricating oil evenly reaches the crimping surfaces of the worm wheel gear 17 and the collars 16 and 16 'to prevent seizure and wear of the crimping surfaces and stabilize the operating torque.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side sectional view showing a torque limiter device according to the present invention, FIG. 2 is an exploded perspective view showing a main part thereof, and FIG. 3 is a scraping conveying device to which the present invention is applied. It is a top view shown. DESCRIPTION OF SYMBOLS 1 ... Scraping conveyance device, 5 ... Scraping conveyance member, 6 ... Shaft,
16 ... 1st color, 16 '... 2nd color, 17 ... Gear (worm wheel gear), 19 ... Drive part (worm gear),
25… Sleeve, 37… Sleeve, 42… Adjusting nut.

Claims (1)

[Scope of utility model registration request] 1. A scraping conveying device in which a rotation from a noise part is transmitted to a scraping conveying member via a gear and a shaft, wherein a first collar is unrotatable and axially pulled out at one end of the shaft. The second collar is fixed to the first collar so as to be non-rotatably and axially movable adjacent to the first collar, and the gear is relatively rotatably sandwiched between the first and second collars. Then, the torque is transmitted by the frictional force between the collar and the side surface of the gear, and the collar is configured to slide at the time of overload, and the adjustment nut is screwed to the other end of the shaft so as to surround the shaft, and the adjustment is performed. A torque limiter in the scraping and conveying device, characterized in that sleeve means is interposed between the nut and the second collar, and the adjustment nut adjusts the frictional force between the collar and the gear. Location.