JPS644903Y2 - - Google Patents

Description

[Detailed explanation of the idea]

(Technical Field) This invention relates to a snow blower, and more particularly, to a snow blower that includes a pair of first and second raking rotors, and has an overload stop mechanism provided in the drive system of each rotor. (Prior art) Conventionally, this type of snow blower has first and second raking rotors connected in conjunction with each other on both sides in the axial direction of a drive shaft that receives input from an input shaft, and the rotation of each rotor moves snow to the center. In addition to collecting snow and throwing it outward through a chute, an overload stop mechanism is provided between the drive shaft and each rotor to prevent overload when any of the rotors is overloaded. It is as if the rotor on the side where the load is generated is stopped. Specifically, as shown in FIG.
A drive shaft 12 is connected to the drive shaft 12 via a gear mechanism, and transmission flanges 1 are provided on both sides of the drive shaft 12 in the axial direction.
3 and 13 are fitted and fixed, and the rotor shafts 15 and 16 of the first and second scraping rotors 7 and 8 are fitted and fixed to the transmission flanges 13 and 13 of each of the drive cylinders 14 and 14, respectively. They are each integrally connected via a plurality of shear pins 17. Thus, during snow removal work, the rotational power transmitted from the input shaft 11 to the drive shaft 12 is transferred from the transmission flanges 13, 13 of the respective drive cylinders 14, 14 to the rotor shafts 15, 16 via the shear pins 17, respectively.
and rotates the rotors 7 and 8. Further, when an overload is applied to either of the rotors 7 and 8 during the snow removal work, the shear pin 17 on the overloaded side is cut off to stop the rotation of the rotor. . By the way, in the snow blower, the shear pin 1
Even if one of the raking rotors 7 and 8 is stopped due to overload, the other one will continue to rotate and snow will be thrown from the chute. A guide plate is provided around the rear outer periphery of each of the rotors 7 and 8, making it difficult to confirm each of the rotors 7 and 8 from the cabin. Therefore, it is difficult to notice that the shear pin 17 has been cut and one of the raking rotors has been stopped, and even though one rotor has been stopped, the snow removal operation continues and the raking of the stopped side is difficult. A large load was placed on the rotor, which could lead to damage. (Purpose of the invention) The present invention was devised in view of the above problems, and its purpose is to focus on the fact that each raking rotor is rotated relative to the stationary member on the machine side during normal snow removal work, and to A pulse generator is interposed between each rotor and the stationary member, and the rotation of each rotor is detected by pulse signals output from these generators, and the operator is notified that the rotation of each rotor has stopped. By doing this, it is an object of the present invention to provide a snow blower that can reliably prevent snow removal from continuing with only one of the raking rotors. (Structure of the invention) The structure of the invention supports the snow removal section 6 having a pair of scraping rotors 7 and 8 at the front part of the machine body 1 equipped with the traveling device 2 and the engine 3, and The rotor shafts 15 and 16 of the scraping rotors 7 and 8 in the snow removal section 6 are linked to the drive shaft 12 linked to the engine 3 via an overload stop mechanism that cuts off power transmission in the event of an overload. In the snow removal machine, pulse generators 18 and 19 are provided at opposing positions of the rotors 7 and 8 in the stationary member of the snow removal section 6, respectively, for generating pulse signals independently according to the rotation of each of the rotors 7 and 8. rotor 7,
At the same time, an alarm 22 is installed so that the respective pulse signals generated by the rotation of the rotors 8 and 8 are synchronized, and an alarm 22 is installed to notify when the power transmission to one of the scraping rotors 7 and 8 is cut off and the respective pulse signals are not synchronized. It is characterized by the fact that it has been provided. (Embodiments) The snow removal machine according to the present invention will be explained below with reference to embodiments shown in the drawings. In the figure, reference numeral 1 denotes the body of a snow blower, which is equipped with a traveling device 2 at the bottom, an engine 3 and a cabin 4 at the top, and a snow removal section 6 supported at the front part of the body 1 via a mounting member 5. There is. The snow removal section 6 includes a pair of left and right first and second scraping rotors 7 and 8, a guide plate 9 provided around the rear outer periphery of each of the rotors 7 and 8, and a guide plate 9 provided at the center of the guide plate 9. The snow is collected at the center of the guide plate 9 by the rotary drive of the rotors 7 and 8, and the snow is thrown outward by the chute 10. The rotational drive of each of the rotors 7 and 8 is performed in the same manner as in the conventional case described above. That is, a drive shaft 12 is connected to the input shaft 11 linked to the engine 3 via a gear mechanism, and the drive shaft Drive cylinders 14, 14 having transmission flanges 13, 13 are fitted and fixed on both sides of the rotor 12 in the axial direction. The load stopping mechanism is integrally coupled via a plurality of shear pins 17, and transmits the rotational power transmitted from the input shaft 11 to the drive shaft 12 to the rotor shafts 15, 16 via the respective shear pins 17, and While each rotor 7, 8 is rotated, when an overload is applied to each rotor 7, 8, the shear pin 17 is cut off to stop the overloaded rotor. In the snow blower as described above, pulse generators 18 and 19 that generate pulse signals by the rotation of each of the rotors 7 and 8 are placed at positions facing the rotors 7 and 8 in the stationary member of the snow removal section 6, respectively. It is installed so that the signals generated by the rotation of the rotors 7 and 8 are synchronized, and the scraping rotor 7,
An alarm 22 is provided to notify when the power transmission to one of the shear pins 8 is cut off and the pulse signals are not synchronized, thereby detecting the disconnection of the shear pin 17. Specifically, side plates 7a, 8a are provided on the outside in the axial direction of each of the rotors 7, 8, and a plurality of rotor blades 7 constituting each rotor 7, 8 are provided on the side plates 7a, 8a.
Support plates 9a, 9b are arranged to fixedly support the rotors 7, 8b, respectively, and to face the respective side plates 7a, 8a at a predetermined interval from both outer sides of the guide plate 9 provided around the outer periphery of each of the rotors 7, 8. extended,
The rotor shafts 15, 1 are attached to the support plates 9a, 9b.
6 is supported to rotate freely. Then, the pulse generators 18 and 19 are attached to each of the support plates 9a and 9b, and the support plates 9
side plates 7a of each rotor 7, 8 facing a, 9b;
8a, the actuating bodies 20, 21 which rotate integrally with the respective side plates 7a, 8a are attached, while each of the generators 1
8, 19 are provided with detection pieces 18a, 19a extending toward the actuating bodies 20, 21, and each of the side plates 7a, 8
With the rotation of a, the detection piece 1 of each generator 18, 19
8a, 19a are brought into contact with each of the actuating bodies 20, 21, so that each of the generators 18, 19 outputs a pulse signal. Further, each of the detection pieces 18a, 19a is brought into contact with each of the actuating bodies 20, 21 at the same time, so that the pulse signals from the respective generators 18, 19 are synchronized, and this pulse signal causes the shear pin to 17 cuts are detected. That is, when the rotors 7 and 8 are rotating normally, as shown in Table 1 below, the left and right generators 18 and 19 generate:

[Table] When synchronized pulse signals are output, and either one of the rotors 7 and 8 is stopped, as shown in Tables 2 and 3 below,

【table】

[Table] The pulse signal from either one of the generators 18, 19 is stopped. In this way, each of the generators 18 and 19 is provided with the following fourth
Connect digital circuit X as shown in the table,

[Table] When the pulse signal from either of the left and right generators 18, 19 is stopped and is in an asynchronous state, the alarm 22 connected to each generator 18, 19 is turned on, and the rotor 7, 8 This is done to notify the operator that one of the two has been stopped. Actuating bodies 20, 2 provided on each side plate 7a, 8a
1 includes substrates 20a, 21a, and a pair of actuators 20b, 20b, 21b each having a quarter arc shape.
21b, each actuator 20b, 20b,
21b and 21b are respectively attached to the substrates 20a and 21a at a distance of 90 degrees, so that when each rotor 7 and 8 rotates once, a signal of 1 and 0 is output twice each. The snow blower of the present invention is constructed as described above, and when the raking rotors 7 and 8 are rotating normally during snow removal work, each pulse generator 18 and 1
9 outputs a synchronized pulse signal, the alarm 22 does not operate, and either one of the scraping rotors 7 and 8 is overloaded, and the shear pin 17 is cut off, causing the overload side to overload. When the rotor is stopped, the pulse signals from one of the generators 18 and 19 are stopped, and each pulse signal is in an asynchronous state. Therefore, the alarm 22 is activated, and each scraping rotor 7 , 8 has been stopped. (Effect of the invention) As explained above, in the snow blower of the present invention, the snow removal section 6 having a pair of scraping rotors 7 and 8 is supported at the front part of the machine body 1 equipped with the traveling device 2 and the engine 3. At the same time, the rotor shafts 15 and 16 of the scraping rotors 7 and 8 in the snow removal section 6 are linked to the drive shaft 12 that is linked to the engine 3 with an overload stop mechanism that cuts off power transmission in the event of an overload. In the snow remover, pulse generators 18 and 19 are provided at opposing positions of the rotors 7 and 8 in the stationary member of the snow removal section 6, and each generates a pulse signal independently according to the rotation of each of the rotors 7 and 8, The rotors are installed so that the respective pulse signals generated by the rotation of the rotors 7 and 8 are synchronized, and an alarm is operated when the power transmission to one of the scraping rotors 7 and 8 is cut off and the respective pulse signals are not synchronized. Since the alarm 22 is installed, the operator can instantly know that one of the raking rotors has been stopped due to overload during snow removal work, and unlike conventional methods, the operator does not know that one of the raking rotors has been stopped. In addition, it has been possible to reliably prevent the situation where snow removal work is continued using only one of the raking rotors, and it has also been possible to prevent an excessive load from being applied to the rotor on the stopped side, which could lead to damage. be.

[Brief explanation of drawings]

Figure 1 is a side view of the snow blower according to the present invention, Figure 2 is a side view of the snow blower according to the invention;
3 is a front view of the part where the pulse generator is attached, FIG. 4 is a side view of the operating body, and FIG. 5 is a plan view of a conventional example. 7...First scraping rotor, 8...Second scraping rotor, 18, 19...Pulse generator.

Claims (1)

[Scope of utility model registration request] A snow removal section 6 having a pair of scraping rotors 7 and 8 is located at the front of the machine body 1 equipped with a traveling device 2 and an engine 3.
The rotor shafts 15 and 16 of the scraping rotors 7 and 8 in the snow removing section 6 are connected to the drive shaft 12 linked to the engine 3, and an overload stop mechanism is provided to cut off power transmission in the event of an overload. In a snow blower that is interlocked with the rotors 7 and 8 in the stationary member of the snow removal section 6,
Pulse generators 18 and 19 that generate pulse signals independently according to the rotation of each of the rotors 7 and 8;
are installed so that the respective pulse signals generated by the rotation of the rotors 7 and 8 are synchronized, and when the power transmission to one of the scraping rotors 7 and 8 is interrupted and the respective pulse signals are not synchronized. A snow removal machine characterized by being provided with an alarm device 22 that operates to notify.