JP2021191644A - Rubber crawler, and crawler vehicle - Google Patents

Abstract

To suppress the occurrence of malfunctioning in a transmitter in a rubber crawler provided with a temperature sensor and a transmitter for transmitting temperature information detected by the temperature sensor.SOLUTION: A rubber crawler 40 comprises: an endless belt-like rubber elastic body 42; a plurality of rubber protrusions 44 provided on an inner circumferential surface 42A of the rubber elastic body 42 at intervals in the crawler circumferential direction, and protruding from the inner circumferential surface 42A toward the inside of the crawler; a plurality of lugs 46 provided on an outer circumferential surface 42B of the rubber elastic body 42 at intervals in the crawler circumferential direction, and protruding from the outer circumferential surface 42B toward the outside of the crawler; temperature sensors 48, 50 and 52 embedded in at least one of the rubber elastic body 42, the rubber protrusions 44 and the lugs 46, and for detecting temperatures of embedded parts; and a transmitter 54 detachably mounted in a recess 45 provided on at least one of the rubber protrusions 44, electrically connected to the respective temperature sensors in a mounted state in which it is mounted to the recess 45, and for transmitting temperature information detected by the respective temperature sensors.SELECTED DRAWING: Figure 3

Description

The present invention relates to rubber crawlers and crawlers.

Conventionally, a technique for measuring the surface temperature of a rubber crawler during traveling has been known. For example, in Patent Document 1, a temperature sensor and a transmitter are embedded inside a rubber crawler, and the temperature information detected by the temperature sensor is transmitted from the transmitter to a receiver provided in a crawler vehicle on which the rubber crawler is mounted. A technique for obtaining temperature information of a rubber crawler is disclosed.

U.S. Patent Application Publication No. 2017/01770111

By the way, when the temperature sensor and the transmitter are embedded inside the rubber crawler, there is a possibility that the transmitter may malfunction due to the heat generated when the rubber crawler is vulcanized.

In consideration of the above facts, the present invention causes a problem in the transmitter in a rubber crawler including a temperature sensor and a transmitter for transmitting temperature information detected by the temperature sensor and a crawler vehicle using the rubber crawler. The challenge is to suppress.

The rubber crawler according to the first aspect of the present invention is provided on the inner peripheral surface of the rubber elastic body having an endless band shape at intervals in the crawler circumferential direction, and is directed from the inner peripheral surface to the inside of the crawler. A plurality of rubber protrusions protruding from the outer peripheral surface, a plurality of lugs provided on the outer peripheral surface of the rubber elastic body at intervals in the circumferential direction of the crawler, and protruding from the outer peripheral surface toward the outside of the crawler, and the rubber elastic body, said. A temperature sensor embedded in at least one of the rubber protrusion and the lug and detecting the temperature of the buried portion, and a detachably attached recess attached to the recess provided in the rubber protrusion and attached to the recess. In the state, it includes a transmitter that is electrically connected to the temperature sensor and transmits the temperature information detected by the temperature sensor.

In the rubber crawler of the first aspect, the temperature of the embedded portion is detected by the temperature sensor embedded in at least one of the rubber elastic body, the rubber protrusion and the lug during traveling. The temperature information detected by the temperature sensor is transmitted to the outside via the transmitter. Here, by receiving the temperature information transmitted from the transmitter, it is possible to grasp the temperature state of the temperature measuring portion (the portion where the temperature sensor is embedded) of the rubber crawler during traveling.

Further, in the rubber crawler of the first aspect, the transmitter is detachably mounted in a recess provided in at least one rubber protrusion, and in the mounted state in which the transmitter is mounted in the recess, the transmitter has a temperature sensor and electricity. Is connected. Therefore, when the rubber crawler is vulcanized, the transmitter can be separated from the rubber protrusions to avoid heat input to the transmitter. Furthermore, it is possible to avoid applying pressure to the transmitter during vulcanization. That is, by mounting the transmitter in the recess after vulcanizing the rubber crawler, it is possible to prevent the transmitter from malfunctioning due to the heat and pressure when the rubber crawler is vulcanized. From the above, according to the rubber crawler, it is possible to suppress the occurrence of a malfunction in the transmitter.

The rubber crawler according to the second aspect of the present invention is the rubber crawler according to the first aspect. Are formed respectively, and the transmitter is arranged on the top side of the rubber protrusion.

In the rubber crawler of the second aspect, the rolling wheels pass on the rolling wheel passing surface during traveling. Here, when the rolling wheel comes into contact with the side surface (the surface in the crawler width direction) of the rubber protrusion during turning or running on a slope of the rubber crawler, the load from the rolling wheel acts mainly on the root side of the rubber protrusion. However, in the rubber crawler, since the transmitter is arranged on the top side of the rubber protrusion on which the load from the rolling wheels is hard to act, it is possible to prevent the transmitter from malfunctioning during traveling.

The rubber crawler of the third aspect of the present invention is the rubber crawler of the second aspect, in which the recess is open to the top of the rubber protrusion, and in the mounted state of the transmitter, the transmitter is inside the recess. A part of the transmitter is exposed to the outside through the opening.

According to the rubber crawler of the third aspect, in the mounted state in which the transmitter is mounted in the recess, the transmitter is housed in the recess, so that the transmitter is housed in the recess as compared with the case where the transmitter is not housed in the recess, for example. Damage can be suppressed. Further, in the mounted state of the transmitter, a part of the transmitter is exposed to the outside through the opening of the recess, so that the state of the transmitter can be visually confirmed.

The rubber crawler according to the fourth aspect of the present invention is the rubber crawler according to any one of the first to third aspects, and the rubber protrusion has a cover member that covers the transmitter in the mounted state. Is attached.

According to the rubber crawler of the fourth aspect, when the transmitter is mounted in the recess, the transmitter is covered by the cover member attached to the rubber protrusion. Therefore, for example, the transmitter is not covered by the cover member. In comparison, damage to the transmitter can be suppressed.

The rubber crawler according to the fifth aspect of the present invention is the rubber crawler according to any one of the first to fourth aspects, and the temperature sensor is a thermocouple.

In the rubber crawler of the fifth aspect, since the thermocouple is used as the temperature sensor, one end of the thermocouple can be arranged at an arbitrary position of the rubber elastic body, the rubber protrusion and the lug. Further, since the thermocouple is flexible, it can follow the deformation of the rubber crawler (for example, bending deformation) and is unlikely to be the starting point of the occurrence of a defect.

The crawler vehicle of the sixth aspect of the present invention includes a machine body including a drive shaft, a drive wheel connected to the drive shaft of the machine body, a floating wheel rotatably attached to the machine body, and the drive wheel of the machine body. A plurality of rolling wheels rotatably attached between the wheel and the floating wheel, and any of the first to fifth embodiments in which the rolling wheels are wound around the driving wheel and the floating wheel and the rolling wheels are arranged inside the crawler. The rubber crawler of the above aspect is provided with a receiver provided on the machine body and receiving temperature information transmitted from the transmitter of the rubber crawler.

In the crawler vehicle of the sixth aspect, the temperature of the embedded portion is detected by the temperature sensor embedded in at least one of the rubber elastic body, the rubber protrusion and the lug of the rubber crawler during traveling. The temperature information detected by the temperature sensor is transmitted to the outside via the transmitter and received by the receiver provided in the airframe. Here, by using the temperature information received by the receiver, it is possible to grasp the temperature state of each part of the rubber crawler (the part where the temperature sensor is embedded) during traveling.

Further, in the crawler vehicle of the sixth aspect, since the rubber crawler of any one of the first to fifth aspects is used, the rubber crawler can be mounted by mounting the transmitter in the recess after vulcanizing the rubber crawler. It is avoided that the heat and pressure during vulcanization cause malfunctions in the transmitter. From the above, according to the crawler vehicle, it is possible to suppress the occurrence of a malfunction in the transmitter, so that the temperature state of the rubber crawler can be stably grasped.

As described above, according to the present invention, in a rubber crawler provided with a temperature sensor and a transmitter and a crawler vehicle using the rubber crawler, it is possible to suppress the occurrence of a defect in the transmitter.

It is a side view which saw the crawler car which attached the rubber crawler which concerns on one Embodiment of this invention from the side. It is an enlarged view of the part pointed out by the arrow 2X of FIG. FIG. 3 is a cross-sectional view taken along the line 3X-3X of FIG. It is sectional drawing (cross-sectional view corresponding to FIG. 3) which shows the state which covered the transmitter with a cover member.

Hereinafter, a rubber crawler according to an embodiment of the present invention and a crawler vehicle using the rubber crawler will be described.

As shown in FIG. 1, the crawler vehicle 20 is a vehicle related to agricultural machinery and construction machinery, and includes a body 22, a crawler traveling device 24, and a receiver 26.

The aircraft 22 is provided with a cockpit or the like (not shown) for operating the crawler vehicle 20. The cockpit is provided with a display unit (not shown) for displaying temperature information to be described later, which is received by the receiver 26. Further, the machine body 22 includes a drive shaft 28 connected to a drive wheel 30 described later.

The crawler traveling device 24 constitutes a traveling portion of the crawler vehicle 20, and is provided on both the left and right sides of the machine body 22 (in FIG. 1, only the crawler traveling device 24 on one side is shown). The crawler traveling device 24 includes a drive wheel 30, a floating wheel 32, a plurality of rolling wheels 34, and an endless rubber crawler 40.

As shown in FIG. 1, the drive wheel 30 is connected to a drive shaft 28 extending from a drive source (not shown) provided in the airframe 22. The drive wheel 30 includes a pair of metal ring portions 30A attached to the drive shaft 28 at intervals in the axial direction, and a coated rubber 30B that covers the outer periphery of the ring portion 30A.

Each of the pair of wheel portions 30A rotates with the rotation of the drive shaft 28. Further, the ring portion 30A passes (rolls) on the rolling wheel passing surface 56 while contacting the rolling wheel passing surface 56 of the rubber elastic body 42 described later via the coated rubber 30B.

The drive wheel 30 causes the wound rubber crawler 40 to exert a driving force from the drive source (details will be described later), so that the rubber crawler 40 is circulated between the drive wheel 30 and the idle wheel 32. ing.

As shown in FIG. 1, the idler wheel 32 is rotatably attached to the airframe 22. Specifically, it is rotatably attached to an adjustment frame (not shown) connected to a support frame 23 for supporting wheels provided on the side surface of the machine body 22. The adjusting frame is movable with respect to the support frame 23 in the traveling direction M of the crawler traveling device 24. By moving the adjusting frame with respect to the support frame 23 in the traveling direction M, the distance between the drive wheels 30 and the idler wheels 32 (distance between the axes) is extended, and the adjustment frame is wound around the drive wheels 30 and the idler wheels 32. Tension is applied to the rubber crawler 40. As a mechanism for moving the adjusting frame with respect to the support frame 23 in the traveling direction M, for example, a pressurizing mechanism such as hydraulic pressure may be used.

The idler wheel 32 covers the shaft portion 32A rotatably supported by the adjustment frame, a pair of metal ring portions 32B attached to the shaft portion 32A at intervals in the axial direction, and the outer periphery of the ring portion 32B. It is provided with a coated rubber 32C.

The ring portion 32B passes (rolls) on the rolling wheel passing surface 56 while contacting the rolling wheel passing surface 56 via the coated rubber 32C as the rubber crawler 40 circulates.

As shown in FIG. 1, the plurality of wheels 34 are rotatably attached to the airframe 22. Specifically, the plurality of wheels 34 are rotatably attached to the above-mentioned support frame 23 at intervals in the traveling direction M. Further, the weight of the crawler wheel 20 is supported by these wheels 34.

The rolling wheel 34 covers the shaft portion 34A rotatably supported by the support frame 23, a pair of metal ring portions 34B attached to the shaft portion 34A at intervals in the axial direction, and the outer periphery of the ring portion 34B. Covered rubber 34C and the like.

The ring portion 34B passes (rolls) on the rolling wheel passing surface 56 while contacting the rolling wheel passing surface 56 via the coated rubber 34C as the rubber crawler 40 circulates.

The free wheel 32 and the plurality of rolling wheels 34 are driven to rotate with respect to the rubber crawler 40 that circulates between the drive wheel 30 and the free wheel 32.

Further, when the rubber crawler 40 is wound around the drive wheel 30 and the idle wheel 32 with a predetermined tension, a frictional force is applied between the outer peripheral surface of the drive wheel 30 (the outer peripheral surface of the coated rubber 30B) and the rolling wheel passing surface 56. Is generated, and the driving force from the driving source is transmitted to the rubber crawler 40 via the driving wheels 30. As a result, the rubber crawler 40 circulates between the drive wheel 30 and the idle wheel 32, and the crawler traveling device 24 travels.

As shown in FIG. 1, the rubber crawler 40 of the present embodiment is used by being wound around a drive wheel 30 and a floating wheel 32. Further, a plurality of wheels 34 are arranged inside the crawler of the wound rubber crawler 40.

The rubber crawler 40 of the present embodiment is a so-called core metal-less type rubber crawler that does not have a core metal.

In the present embodiment, the circumferential direction of the endless rubber crawler 40 (indicated by the arrow CD in FIG. 2) is described as "crawler circumferential direction", and the width direction of the rubber crawler 40 (indicated by the arrow WD in FIG. 3) is described as "Crawler circumferential direction". In the crawler width direction ". The crawler circumferential direction (synonymous with the longitudinal direction of the rubber crawler 40) and the crawler width direction are orthogonal to each other when the rubber crawler 40 is viewed from the inside or the outside.
Further, in the present embodiment, the inside of the rubber crawler 40 (including the annular shape, the elliptical ring shape, the polygonal ring shape, etc.) wound around the drive wheel 30 and the idle wheel 32 to form an annular shape (direction indicated by arrow IN in FIG. 3). The side) is described as "inside the crawler", and the outside of the rubber crawler 40 (the direction side indicated by the arrow OUT in FIG. 3) is described as "outside the crawler". The arrow IN direction (inner direction of the ring) and the arrow OUT direction (outer direction of the ring) in FIG. 3 indicate the inside / outside direction of the rubber crawler 40 in the wound state (synonymous with the thickness direction of the rubber crawler 40). ..

In the present embodiment, the rubber crawler 40 is wound around the drive wheel 30 and the idle wheel 32, but the present invention is not limited to this configuration. For example, depending on the arrangement of the drive wheels 30, the floating wheels 32, and the rolling wheels 34, the rubber crawler 40 may be wound around one or a plurality of rolling wheels 34 in addition to the driving wheels 30 and the floating wheels 32.

The receiver 26 is provided on the machine body 22. The receiver 26 wirelessly receives temperature information of each part of the rubber crawler 40 transmitted by the transmitter 54 included in the rubber crawler 40, which will be described later. The temperature information received by the receiver 26 is processed by a processing unit (not shown) and displayed on the display unit of the cockpit of the aircraft 22.

As shown in FIGS. 2 and 3, the rubber crawler 40 includes a rubber elastic body 42, a rubber protrusion 44, a lug 46, a temperature sensor (temperature sensor 48, temperature sensor 50, and temperature sensor 52), and a transmitter. 54 and.

The rubber elastic body 42 is a strip-shaped body in which a rubber material as an example of an elastic material is formed in an endless strip shape. The circumferential direction, width direction, inner peripheral side, and outer peripheral side of the rubber elastic body 42 of the present embodiment coincide with the crawler peripheral direction, crawler width direction, crawler inner peripheral side, and crawler outer peripheral side, respectively.

A plurality of rubber protrusions 44 are provided on the inner peripheral surface 42A of the rubber elastic body 42 at intervals in the crawler circumferential direction. The rubber protrusion 44 projects from the inner peripheral surface 42A toward the inside of the crawler.

Further, the rubber protrusion 44 is arranged on the center line CL passing through the center of the rubber elastic body 42 in the crawler width direction. The rubber protrusion 44 limits the movement of the wheel in the crawler width direction by abutting on a wheel (referring to a drive wheel 30, a floating wheel 32, and a rolling wheel 34) that rolls on a wheel passing surface 56, which will be described later. do. In other words, the rubber protrusion 44 can suppress the relative movement of the rubber crawler 40 and the wheel in the crawler width direction by abutting the wheel on the side surface 44B, that is, the lateral displacement of the rubber crawler 40 with respect to the wheel can be suppressed. ..

Further, at least one of the plurality of rubber protrusions 44 is provided with a recess 45 to which the transmitter 54 is detachably mounted. In the present embodiment, the recess 45 is provided in one rubber protrusion 44, but the present invention is not limited to this configuration. For example, the rubber protrusions 44 may be provided with recesses 45 for each predetermined number. Further, as shown in FIG. 3, the recess 45 is open to the top 44A of the rubber protrusion 44.

As shown in FIG. 3, on both outer sides of the rubber protrusion 44 of the rubber elastic body 42 in the crawler width direction, rolling wheel passing surfaces 56 extending along the crawler circumferential direction are formed. The rolling wheel passing surface 56 is flat and forms a part of the inner peripheral surface 42A of the rubber elastic body 42. In other words, the rolling wheel passing surface 56 is included in the inner peripheral surface 42A of the rubber elastic body 42.

A plurality of lugs 46 are provided on the outer peripheral surface 42B of the rubber elastic body 42 at intervals in the circumferential direction of the crawler. The rubber protrusion 44 projects from the outer peripheral surface 42B toward the inside of the crawler.

As shown in FIG. 3, a belt layer 58 formed by covering a belt cord with a rubber material is embedded in the rubber elastic body 42. The belt layer 58 functions as a tension body against the tension applied to the rubber crawler 40.

The temperature sensor is embedded in at least one of the rubber elastic body 42, the rubber protrusion 44, and the lug 46, and detects the temperature of the embedded portion and its surroundings. Specifically, in the present embodiment, the temperature sensor 48 that detects the temperature of the rubber elastic body 42 is used. Further, a temperature sensor 50 that detects the temperature of the rubber protrusion 44 is used. Then, a temperature sensor 52 that detects the temperature of the lag 46 is used.

The temperature sensor 48 is a thermocouple, and as shown in FIG. 3, an inner peripheral rubber portion in which one end 48A, which is a temperature measuring portion, is located between the rolling wheel passing surface 56 of the rubber elastic body 42 and the belt layer 58. It is buried in. Further, the other end 48B of the temperature sensor 48 extends from the bottom surface of the recess 45 of the rubber protrusion 44. The portion between one end 48A and the other end 48B of the temperature sensor 48 is embedded so as to straddle the inside of the rubber elastic body 42 and the inside of the rubber protrusion 44.

The temperature sensor 50 is a thermocouple, and as shown in FIG. 3, one end 50A, which is a temperature measuring unit, is embedded in the vicinity of the side surface 44B of the rubber protrusion 44. Further, the other end 50B of the temperature sensor 50 extends from the bottom surface of the recess 45 of the rubber protrusion 44. The portion between one end 50A and the other end 50B of the temperature sensor 50 is embedded inside the rubber protrusion 44.

The temperature sensor 52 is a thermocouple, and as shown in FIG. 3, one end 52A, which is a temperature measuring unit, is embedded in the lug 46. Further, the other end 52B of the temperature sensor 52 extends from the bottom surface of the recess 45 of the rubber protrusion 44. The portion between one end 52A and the other end 52B of the temperature sensor 52 is embedded so as to straddle the inside of the lug 46, the inside of the rubber elastic body 42, and the inside of the rubber protrusion 44.

The transmitter 54 has a substantially rectangular parallelepiped shape and is detachably attached to the recess 45. When the transmitter 54 is mounted in the recess 45, it is configured to be electrically connected to the temperature sensors 48, 50, and 52, respectively. Further, in the mounted state of the transmitter 54, the transmitter 54 is housed in the recess 45 and a part of the transmitter 54 is exposed to the outside through the opening. Further, in the mounted state of the transmitter 54, the transmitter 54 is arranged on the top 44A side of the rubber protrusion 44.

Further, the transmitter 54 wirelessly transmits the temperature information detected by each of the electrically connected temperature sensors 48, 50, and 52 to the outside.

Next, the operation and effect of the rubber crawler 40 of the present embodiment and the crawler wheel 20 using the rubber crawler 40 will be described.

In the rubber crawler 40, the temperature of the temperature measuring portion of the rubber crawler 40 is detected by the temperature sensor 48, the temperature sensor 50, and the temperature sensor 52 while the crawler wheel 20 is running. The temperature information detected by the temperature sensors 48, 50, and 52 is transmitted to the outside via the transmitter 54, and is received by the receiver 26 provided in the machine body 22. The temperature information received by the receiver 26 is displayed on the display unit provided near the cockpit processed by the processing unit. As a result, the driver of the crawler car 20 can grasp the temperature state of the temperature measuring portion (the portion where the temperature sensors 48, 50, 52 are embedded) of the rubber crawler 40 during traveling. Here, for example, the life of the rubber crawler 40 can be extended by adjusting the speed of the crawler wheel according to the temperature state of the temperature measuring portion of the rubber crawler 40.

Further, in the rubber crawler 40, the transmitter 54 is detachably mounted in the recess 45 provided in the rubber protrusion 44, and in the mounted state in which the transmitter 54 is mounted in the recess 45, the transmitter 54 is attached to each temperature sensor 48. , 50, 52 and electrically connected. Therefore, when the rubber crawler 40 is vulcanized, the transmitter 54 is separated from the recess 45 of the rubber protrusion 44, so that heat input to the transmitter 54 can be avoided. Further, it is possible to avoid applying pressure to the transmitter 54 during vulcanization. That is, by mounting the transmitter 54 in the recess 45 after vulcanizing the rubber crawler 40, it is possible to avoid the problem of the transmitter 54 due to the heat and pressure when the rubber crawler 40 is vulcanized. From the above, according to the rubber crawler 40, it is possible to prevent the transmitter 54 from having a problem.

Further, since the transmitter 54 can be attached to and detached from the recess 45, the battery mounted on the transmitter 54 can be easily replaced.

Further, since the recess 45 is provided in the rubber protrusion 44, in a general coreless rubber crawler, the progress of vulcanization is slow (heat during vulcanization is difficult to transfer), and the heat is effectively directed to the root side of the rubber protrusion. Can be conveyed.

Further, when the crawler vehicle 20 is traveling, the rolling wheels 34 pass on the rolling wheel passing surface 56. Here, when the wheel 34 comes into contact with the side surface 44B of the rubber protrusion 44 during turning or slope running of the crawler vehicle 20, the load from the wheel 34 acts mainly on the root 44C side of the rubber protrusion 44. However, in the rubber crawler 40, since the transmitter 54 is arranged on the top 44A side of the rubber protrusion 44 on which the load from the rolling wheels 34 is hard to act, the transmitter 54 has a problem when the crawler vehicle 20 is running. Can be suppressed.

Further, according to the rubber crawler 40, in the mounted state in which the transmitter 54 is mounted in the recess 45, the transmitter 54 is housed in the recess 45, so that the transmitter 54 is not housed in the recess 45, for example, as compared with the case where the transmitter 54 is not housed in the recess 45. Therefore, damage to the transmitter 54 can be suppressed. Further, in the mounted state of the transmitter 54, since a part of the transmitter 54 is exposed to the outside through the opening 45A of the recess 45, the state of the transmitter 54 can be visually confirmed.

Further, since the rubber crawler 40 uses a thermocouple as each of the temperature sensors 48, 50, 52, one end of the thermocouple can be arranged at an arbitrary position of the rubber elastic body 42, the rubber protrusion 44 and the lug 46. .. Further, since the thermocouple is flexible, it can follow the deformation of the rubber crawler 40 (for example, the bending deformation when it is wound around the drive wheel 30), and it is unlikely to be the starting point of the occurrence of a defect.

In the rubber crawler 40, one end 48A of the temperature sensor 48 is embedded in the inner peripheral rubber portion located between the rolling wheel passing surface 56 of the rubber elastic body 42 and the belt layer 58. The inner peripheral rubber portion is formed by friction between the wheels (driving wheel 30, idle wheel 32, rolling wheel 34) passing on the rolling wheel passing surface 56 and the rolling wheel passing surface 56, and trampling by the rolling wheel passing surface 56. Further, the temperature tends to rise easily due to the compressive stress generated in the inner circumference of the bent portion wound around the drive wheel 30 and the idle wheel 32. Therefore, it is possible to extend the life of the rubber crawler 40 by grasping the temperature information of the inner peripheral rubber portion.
Further, one end 50A of the temperature sensor 50 is embedded in the vicinity of the side surface 44B of the rubber protrusion 44. When the crawler vehicle 20 is turning or traveling on a slope, the wheel 34 abuts on the side surface 44B of the rubber protrusion 44, and friction occurs between the side surface 44B and the wheel 34, so that the temperature around the side surface 44B tends to rise easily. be. Therefore, it is possible to extend the life of the rubber crawler 40 by grasping the temperature information in the vicinity of the side surface 44B of the rubber protrusion 44.
Further, one end 52A of the temperature sensor 52 is embedded in the lug 46. When the crawler vehicle 20 is traveling, the temperature of the lug 46 in contact with the ground tends to rise. Therefore, by grasping the temperature information of the lug 46, it is possible to extend the life of the rubber crawler 40.

In the above-described embodiment, the rubber crawler 40 is configured to include the temperature sensors 48, 50, and 52, but the present invention is not limited to this configuration. For example, the configuration may include only the temperature sensors 48 and 50, the configuration may include only the temperature sensors 50 and 52, and the configuration may include only the temperature sensors 48 and 52.

Further, in the above-described embodiment, as shown in FIG. 3, the temperature of the rubber crawler 40 is measured on one side in the crawler width direction across the center line CL, but the crawler width direction sandwiches the center line CL. The temperature of the rubber crawler 40 may be measured on both sides of the crawler, or the temperature may be measured alternately on one side and the other side in the crawler width direction at intervals in the crawler circumferential direction.

Further, in the above-described embodiment, the temperature state of the temperature measuring portion (the portion where the temperature sensors 48, 50, 52 are embedded) of the rubber crawler 40 during traveling is displayed on the display unit. Is not limited to this configuration. For example, when the temperature of any of the temperature measuring parts of the rubber crawler 40 reaches a preset temperature, the driving force from the driving source of the machine 22 is controlled to automatically decelerate or stop the crawler vehicle 20. May be. Further, the crawler car 20 may be provided with an alarm device such as an alarm, and the alarm device may be activated when the temperature of any of the temperature measuring portions of the rubber crawler 40 reaches a preset temperature. After confirming the operation of the alarm device, the driver can extend the life of the rubber crawler 40 by adjusting the speed of the crawler car 20. Then, the crawler vehicle 20 may be provided with a wireless communication device to transmit the temperature information of the temperature measuring portion of the rubber crawler 40 to a remote place. When operating the crawler car 20 from a remote place, the life of the rubber crawler 40 can be extended by adjusting the speed of the crawler car 20 while the driver at the remote place grasps the temperature state of the temperature measuring part. .. The temperature information sent from the transmitter 54 may be stored in a storage device.

Further, in the above-described embodiment, the transmitter 54 is housed in the recess 45 and a part of the transmitter 54 is exposed to the outside through the opening 45A, but the present invention is not limited to this configuration. For example, as shown in FIG. 4, a cover member 60 that covers the transmitter 54 may be attached to the rubber protrusion 44 when the transmitter 54 is mounted. The rubber protrusion 44 and the cover member 60 are attached, for example, through a female screw portion (not shown) provided in the rubber protrusion 44 and a mounting hole (not shown) provided in the cover member 60, and the screw member (not shown). It may be a screw fastening in which the above is screwed. When the cover member 60 is used in this way, the transmitter 54 is covered by the cover member 60 attached to the rubber protrusion 44, so that the transmitter is not covered by the cover member 60, for example, as compared with the case where the transmitter is not covered by the cover member 60. Damage to the machine 54 can be suppressed.

In the above-described embodiment, one end 48A, which is the temperature measuring portion of the temperature sensor 48, is embedded in the inner peripheral rubber portion located between the rolling wheel passing surface 56 of the rubber elastic body 42 and the belt layer 58. The invention is not limited to this configuration. For example, when a bias cord layer having a vise cord coated with a rubber material is laminated on at least one of the inside of the crawler and the outside of the crawler of the belt layer 58, the belt layer 58 on which one end 48A, which is the temperature measuring portion of the temperature sensor 48, overlaps. It may be configured to be arranged between (interlayers) between the and bias cord layers. By arranging one end 48A of the temperature sensor 48 between the belt layer 58 and the bias cord layer, it is possible to grasp the temperature information in the vicinity of the belt layer 58 and the vicinity of the bias cord layer, and suppress the peeling and delamination of each cord. It becomes possible to plan. This makes it possible to extend the life of the rubber crawler 40. When a plurality of bias code layers are stacked, one end 48A of the temperature sensor 48 between the stacked bias code layers may be arranged. Further, one end of the temperature sensor may be arranged in all of the inner peripheral rubber portion of the rubber elastic body 42, the layers between the belt layer 58 and the bias cord layer, and the layers between the overlapped bias cord layers.

Although the embodiments of the present invention have been described above with reference to the embodiments, these embodiments are examples and can be variously modified and implemented without departing from the gist. Needless to say, the scope of rights of the present invention is not limited to these embodiments.

20 ... Crawler car, 22 ... Aircraft, 24 ... Crawler traveling device, 26 ... Receiver, 28 ... Drive shaft, 30 ... Drive wheels, 32 ... Free wheels, 34 ... Rolling wheel, 40 ... Rubber crawler, 42 ... Rubber elastic body, 42A ... Inner peripheral surface, 42B ... Outer surface, 44 ... Rubber protrusion, 44A ... Top, 44B ... Side, 45 ... Concave, 45A ... Opening, 46 ... Lag, 48 ... Temperature sensor, 48A ... One end, 50 ... Temperature sensor, 50A ... One end, 52 ... temperature sensor, 52A ... one end, 54 ... transmitter, 56 ... wheel passage surface, 58 ... belt layer, 60 ... cover member, CD ... crawler circumferential direction, WD ... crawler width direction, IN ... crawler inside, OUT ... crawler outside

Claims (6)

A rubber elastic body with an endless band shape,
A plurality of rubber protrusions provided on the inner peripheral surface of the rubber elastic body at intervals in the crawler circumferential direction and projecting from the inner peripheral surface toward the inside of the crawler.
A plurality of lugs provided on the outer peripheral surface of the rubber elastic body at intervals in the circumferential direction of the crawler and projecting from the outer peripheral surface toward the outside of the crawler.
A temperature sensor that is embedded in at least one of the rubber elastic body, the rubber protrusion, and the lug, and detects the temperature of the embedded portion.
A transmitter that is detachably attached to at least one recess provided in the rubber protrusion, and is electrically connected to the temperature sensor to transmit temperature information detected by the temperature sensor when attached to the recess. When,
A rubber crawler equipped with. On the inner peripheral surface of the rubber elastic body, rolling wheel passing surfaces through which the rolling wheels pass are formed on both sides in the crawler width direction with the rubber protrusions interposed therebetween.
The rubber crawler according to claim 1, wherein the transmitter is arranged on the top side of the rubber protrusion. The recess is open to the top of the rubber protrusion and
The rubber crawler according to claim 2, wherein in the mounted state of the transmitter, the transmitter is housed in the recess and a part of the transmitter is exposed to the outside through the opening. The rubber crawler according to any one of claims 1 to 3, wherein a cover member for covering the transmitter is attached to the rubber protrusion in the mounted state of the transmitter. The rubber crawler according to any one of claims 1 to 4, wherein the temperature sensor is a thermocouple. An aircraft equipped with a drive shaft and
A drive wheel connected to the drive shaft of the airframe and
A floating wheel that can be rotatably attached to the machine,
A plurality of rolling wheels rotatably attached between the driving wheels and the floating wheels of the airframe, and
The rubber crawler according to any one of claims 1 to 5, wherein the rolling wheels are arranged inside the crawler while being wound around the driving wheels and the floating wheels.
A receiver provided on the machine body to receive temperature information transmitted from the transmitter of the rubber crawler, and a receiver.
Crawler car equipped with.

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