JP6947462B1 - Spare tire support device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a spare tire support device capable of visually confirming whether or not a chain wheel is detented. SOLUTION: A chain wheel 18 provided so as to be rotatable and stopped with respect to a vehicle body 13, a chain 20 wound around the chain wheel 18 and suspending a spare tire, and the chain wheel 18 and the chain 20 are surrounded. The cover 39 provided, the lock mechanism 21 provided outside the cover 39 and preventing the chain wheel 18 from rotating in the direction in which the spare tire is lowered, and the lock mechanism 21 are connected to the chain wheel 18. It has a gear 32, a support shaft 34 provided on the vehicle body 13, and a stopper 35 that can rotate within a range of a predetermined angle about the support shaft 34. The stopper 35 is a chain when engaged with the gear 32. A spare tire support device 15 is configured to prevent the wheel 18 from rotating. [Selection diagram] Fig. 5

Description

The present disclosure relates to a spare tire support device provided in a vehicle to support a spare tire.

Patent Document 1 describes an example of a spare tire support device provided in a vehicle to support a spare tire. The spare tire support device described in Patent Document 1 is fixed to a spare tire carrier attached to a cross member of a vehicle body frame, a crank shaft rotatably supported by the spare tire carrier, and an outer periphery of the crank shaft. It has a chain wheel gear for winding up a chain, a first gear provided on the chain wheel gear, a second gear provided on a spare tire carrier, a chain wheel, and a cover for covering the second gear. The spare tire is suspended by a chain.

Then, when the crankshaft is rotated by the crank handle, the chain wheel gear is rotated, the chain is wound up, and the spare tire is raised. It is stated that when the crankshaft is stopped, the first gear and the second gear are engaged and the chain wheel can be prevented from rotating in the reverse direction.

Jikkai Sho 59-18083

In the spare tire support device described in Patent Document 1, the inventor of the present application visually inspects whether or not the meshing portion between the first gear and the second gear is in a state where the chain wheel is prevented from rotating. I recognized the problem of not being able to confirm.

An object of the present disclosure is to provide a spare tire support device capable of visually confirming whether or not the chain wheel is in a detented state.

The spare tire support device of the present disclosure surrounds the chain wheel provided so as to be rotatable and stopped with respect to the vehicle body, a chain wound around the chain wheel and suspending the spare tire, and the chain wheel and the chain. The lock mechanism includes a cover provided as described above and a lock mechanism provided outside the cover and preventing the chain wheel from rotating in a direction in which the spare tire is lowered. The lock mechanism comprises the chain. A gear connected to a wheel, a support shaft provided on the vehicle body, and a stopper that is rotatable about a support shaft within a predetermined angle and is engaged with and released from the gear. The stopper prevents the chain wheel from rotating in the direction of lowering the spare tire by being engaged with the gear.

According to the spare tire support device of the present disclosure, it is possible to visually confirm whether or not the chain wheel is prevented from rotating in the direction of lowering the spare tire.

(A) is an overall side view of a truck that is the subject of the spare tire support device of the present disclosure, and (B) is a partially enlarged view of FIG. 1 (A). It is a side view of the spare tire support device which can raise and lower a spare tire. It is a top view of the spare tire support device which can raise and lower a spare tire. It is a side view of the spare tire support device in a state where a spare tire is fixed. It is a top view of the spare tire support device in a state where a spare tire is fixed. (A) is a diagram of a state in which the lock mechanism is capable of rotating the gear, and (B) is a diagram of a state in which the lock mechanism is blocking the rotation of the gear.

An embodiment in which the spare tire support device of the present disclosure is provided on a truck will be described with reference to the drawings. In each figure, in principle, the same parts are designated by the same reference numerals, and the repeated description thereof will be omitted.

The truck 10 shown in FIG. 1 (A) has a driver's seat 11, a loading platform 12 provided behind the driver's seat 11, and a vehicle body 13 shown in FIG. 1 (B). The loading platform 12 is supported by the vehicle body 13. An engine is provided in the lower part of the driver's seat 11, and tires 14 are provided in the lower part of the driver's seat 11 and the lower part of the vehicle body 13. When the torque of the engine is transmitted to the tire 14 via the transmission and the power transmission device, the truck 10 can travel.

The spare tire support device 15 is provided on the vehicle body 13. The spare tire support device 15 supports the spare tire 16 as a replacement target for the tire 14. The spare tire support device 15 has a function of fixing the spare tire 16 to the vehicle body 13 and a function of raising and lowering the spare tire 16 between the vehicle body 13 and the ground 17. As shown in FIGS. 2, 3, 4 and 5, the spare tire support device 15 includes a chain wheel 18, a rotating shaft 19 to which the chain wheel 18 is attached, a chain 20 wound around the chain wheel 18, and a lock. It has a mechanism 21.

The vehicle body 13 has two frames 22 and 23 provided along the front-rear direction of the truck 10. The two frames 22 and 23 each have a shaft hole 24. The rotating shaft 19 is arranged in the two shaft holes 24, and the rotating shaft 19 is rotatable about the center line A1. In the present embodiment, it is assumed that the center line A1 is arranged in the width direction of the track 10, that is, in the left-right direction, and is arranged substantially horizontally. The center line A1 is a virtual line passing through the center of the rotation axis 19.

The two frames 22, 23 and the rotating shaft 19 are each made of metal, specifically, steel for machine structure or the like. Of the two frames 22 and 23, the frame 22 is arranged outside the frame 23 in the width direction of the track 10. The end portion 25 of the rotation axis 19 in the direction along the center line A1 is arranged outside the frame 22 in the width direction of the track 10. The end 25 of the rotating shaft 19 has an insertion hole 26 and a notch 27 shown in FIG.

The chain wheel 18 is provided concentrically with the rotating shaft 19 and is fixed to the outer periphery of the rotating shaft 19. The chain wheel 18 is provided between the frame 22 and the frame 23. The chain wheel 18 is made of metal, for example, a rolled steel plate or the like. The chain 20 is wound around the outer circumference of the chain wheel 18 within a range of a predetermined angle, for example, within a range of 200 degrees with the center line A1 as the center. The chain 20 is made of metal, for example, iron, stainless steel, aluminum, or the like.

When the operator looks under the loading platform 12 from the side of the loading platform 12, the vehicle body 13, the insertion hole 26, and the notch 27 can be visually observed. Workers include truck 10 drivers, passengers, witnesses, and the like. The operator prepares a tool, that is, a metal wrench 36. The wrench 36 has a rod shape, and an engaging claw 37 is provided on the outer periphery of the tip of the wrench 36 so as to project. The operator rotates the wrench 36 with the tip of the wrench 36 being inserted into the insertion hole 26 and the engaging claw 37 being inserted into the notch 27. Then, the engaging claw 37 is engaged with the rotating shaft 19, and the chain wheel 18 can be rotated.

The first end in the longitudinal direction of the chain 20 is fixed to the frame 22 or the frame 23. The second end in the longitudinal direction of the chain 20 is connected to a metal engaging piece. The engaging piece is connected to a metal plate 28, and a metal compression coil spring is provided between the engaging piece and the plate 28. The engaging piece and the compression coil spring are not shown for convenience.

Further, as shown in FIGS. 3 and 4, a cover 39 is provided between the frame 22 and the frame 23, and the cover 39 is fixed to the frame 22 and the frame 23. The cover 39 is provided so as to surround the side and the upper side of the chain wheel 18 and the chain 20. The lower part of the cover 39 is open, and the chain 20 can be moved along the longitudinal direction to enter and exit the space covered by the cover 39.

The spare tire 16 shown in FIG. 1B has a rubber portion 29 and a metal wheel 30 that supports the rubber portion 29. The wheel 30 is made of metal, for example steel, and the wheel 30 has a support hole 31 as shown in FIG. With the chain 20 inserted into the support hole 31 and the plate 28 engaged with the wheel 30, the second end of the chain 20 is located at the center of the spare tire 16, so that the spare tire 16 has its own weight. It is supported by the chain 20 in a state of being suspended by.

The lock mechanism 21 is a mechanism for switching between a state in which the chain wheel 18 can rotate and a state in which the chain wheel 18 is prevented from rotating. The lock mechanism 21 is provided on the side of the frame 22. The lock mechanism 21 has a gear 32, a bracket 33, a support shaft 34, a stopper 35, and a lock pin 53, as shown in FIGS. 3 and 4. The gear 32 is provided concentrically with the rotating shaft 19 and is fixed to the rotating shaft 19. The gear 32 is provided between the frame 22 and the end portion 25 in the direction along the center line A1. The gear 32 can rotate and stop together with the rotating shaft 19. The gear 32 is made of metal, for example, iron or steel for machine structure. The gear 32 has a disk-shaped boss portion 41 and a plurality of protrusions 42 provided on the outer periphery of the boss portion 41 at equal intervals.

The bracket 33 is fixed to the side surface of the frame 22. The method of fixing the bracket 33 to the frame 22 may be either screw fixing or welding fixing. The bracket 33 is made of metal, for example, iron or steel for machine structure. As shown in FIG. 2, the bracket 33 is provided on the side of the gear 32 in a side view of the frame 22. As shown in FIG. 3, the bracket 33 has a first plate 43, a second plate 44, and a connecting portion 45. The first plate 43 is fixed in surface contact with the frame 22. The connecting portion 45 connects the portions of the first plate 43 and the second plate 44 that are most distant from the gear 32. The first plate 43 and the second plate 44 are arranged parallel to each other and extend along the frame 22.

An insertion hole 46 that penetrates the first plate 43 in the direction along the center line A1 is provided, and an insertion hole 47 that penetrates the second plate 44 in the direction along the center line A1 is provided. The second plate 44 is provided with two notches 48 protruding outward from the insertion hole 47. As shown in FIGS. 6A and 6B, the two notches 48 extend from the insertion hole 47 in the direction of action of gravity (height direction / vertical direction). Further, an insertion hole 49 is provided which penetrates the frame 22 in the direction along the center line A1. The three insertion holes 46, 47, 49 are provided concentrically, are arranged at the same position in the height direction of the vehicle body 13, and are provided at the same position in the front-rear direction of the truck 10.

The support shaft 34 is attached to the first plate 43 and the second plate 44, and is provided in the direction along the center line A1. The stopper 35 is provided between the first plate 43 and the second plate 44, and can operate around the support shaft 34, that is, can rotate. The stopper 35 is rotated about the support shaft 34, and the tip 50 of the stopper 35 can engage and disengage the protrusion 42 of the gear 32.

As shown in FIGS. 3 and 6A, a support shaft 51 is provided on the second plate 44, and a lock pin 53 is attached to the support shaft 51 via a connecting member 52. The lock pin 53 is made of metal and has a shaft portion 54 and a connecting portion 55 connected to the shaft portion 54. The connecting portion 55 projects from the shaft portion 54 in the radial direction of the shaft portion 54, and the lock pin 53 is bent in an L shape. The connecting member 52 is made of a flexible chain, wire, or the like. The connecting member 52 is connected to the connecting portion 55. The shaft portion 54 is longer than the connecting portion 55. The outer diameter of the shaft portion 54 is less than the inner diameter of each of the insertion holes 46, 47, 49. A wing piece 56 protruding from the outer peripheral surface of the shaft portion 54 is provided. The connecting portion 55 and the blade piece 56 are provided at different positions in the circumferential direction of the shaft portion 54.

Next, the work of supporting the spare tire 16 by the spare tire support device 15 and the work of removing the spare tire 16 from the spare tire support device 15 will be described. Before the spare tire 16 is supported by the spare tire support device 15, the lock pin 53 is pulled out from the insertion holes 46, 47, 49 as shown in FIG. 6A. Further, the tip 50 of the stopper 35 is located between the protrusion 42 of the gear 32 and the protrusion 42, and the stopper 35 is stopped in a state of being in contact with the outer peripheral surface of the boss portion 41. The position where the tip 50 of the stopper 35 and the boss portion 41 are in contact with each other is above the rotating shaft 19 and the support shaft 34.

The operator inserts the plate 28 into the support hole 31 of the wheel 30. Then, the tip of the wrench 36 is inserted into the insertion hole 26 of the rotating shaft 19, and the engaging claw 37 is inserted into the notch 27. Further, when the operator rotates the wrench 36, the rotating shaft 19 is rotated clockwise in FIG. 2, and the chain wheel 18 winds up the chain 20. Then, the plate 28 is engaged with the wheel 30, and the spare tire 16 is lifted and raised by the chain 20.

While the gear 32 is rotated clockwise in FIG. 2, the stopper 35 is pushed up by a protrusion 42 located below the tip 50, and the stopper 35 is rotated counterclockwise within a predetermined angle. When the protrusion 42 is overcome, the stopper 35 is rotated clockwise by its own weight, and the tip 50 comes into contact with the boss portion 41, and the operation is repeated.

Then, when the wheel 30 is pressed against the vehicle body 13 as shown in FIG. 4, the operator stops the wrench 36 and pulls out the tip of the wrench 36 from the insertion hole 26. Due to the mass of the spare tire 16, the gear 32 is subjected to a force that tends to turn counterclockwise in FIG. However, the tip 50 of the stopper 35 is fitted to the protrusion 42 located above the tip 50, and the stopper 35 prevents the gear 32 and the chain wheel 18 from rotating.

Further, the operator inserts the shaft portion 54 of the lock pin 53 into the insertion hole 47 and the insertion holes 46 and 49 as shown in FIG. Here, by setting the phase of the shaft portion 54 so that the blade piece 56 faces in the vertical direction, the blade piece 56 can be inserted into the notch 48. Then, when the operator releases the lock pin 53, the connecting portion 55 is rotated by a predetermined angle, that is, approximately 90 degrees with respect to the shaft portion 54 due to the weight of the connecting portion 55, and FIGS. As in B), the connecting portion 55 stops at a position where the connecting portion 55 faces directly downward. In this way, the work of supporting the spare tire 16 with the spare tire support device 15 is completed. Further, as shown in FIG. 4, since the blade piece 56 and the notch 48 are located at different positions in the circumferential direction of the insertion hole 47, a force for the lock pin 53 to come out of the insertion holes 49, 46, 47 acts. However, since the wing piece 56 comes into contact with the second plate 44, the lock pin 53 does not come out of the insertion holes 49, 46, 47.

When the spare tire 16 is supported by the spare tire support device 15, the plate 28 is pressed against the wheel 30 by the force of the compression coil spring. That is, the wheel 30 is sandwiched between the plate 28 and the vehicle body 13, and the spare tire 16 is securely fixed to the vehicle body. Therefore, it is possible to prevent the spare tire 16 from vibrating while the truck 10 is traveling.

Further, when a force for rotating the gear 32 in the clockwise direction is generated due to the vibration of the truck 10 during traveling, a force for rotating the stopper 35 counterclockwise around the support shaft 34 is generated. work. However, when the shaft portion 54 of the lock pin 53 comes into contact with the stopper 35, the stopper 35 is prevented from rotating counterclockwise about the support shaft 34. Therefore, the tip 50 of the stopper 35 can be maintained in a state of being engaged with the protrusion 42 of the gear 32. Therefore, it is possible to prevent the gear 32 and the chain wheel 18 from rotating counterclockwise in FIG. 4, and it is possible to prevent the spare tire 16 from falling off from the spare tire support device 15.

Further, the engagement portion between the tip 50 of the stopper 35 and the protrusion 42 of the gear 32 is provided on the outside of the cover 39. Therefore, the operator can visually confirm that the stopper 35 and the protrusion 42 are engaged from the side of the vehicle body 13. Therefore, the reliability of the lock mechanism 21 is improved regardless of the driving history of the truck 10, the replacement history of the spare tire 16, and the like.

When the operator removes the spare tire 16 from the spare tire support device 15, the lock pin 53 is rotated to match the phases of the wing piece 56 and the notch 48, and the lock pin 53 is inserted into the insertion holes 46 and 47. , 49. Then, the tip of the wrench 36 is inserted into the insertion hole 26 of the rotating shaft 19, and the wrench 36 is rotated clockwise in FIG. 4 to release the stopper 35 and the protrusion 42.

Further, the operator rotates the stopper 35 counterclockwise in FIG. 4 about the support shaft 34, and stops the stopper 35 at a position where it is hung by its own weight as shown in FIG. After that, the operator rotates the gear 32 counterclockwise with the wrench 36 to lower the spare tire 16. Further, the plate 28 is pulled out from the support hole 31 and the spare tire 16 is removed.

An example of the technical meaning of the matters described in this embodiment is as follows. The spare tire support device 15 is an example of the spare tire support device. The vehicle body 13 is an example of a vehicle body, and the chain wheel 18 is an example of a chain wheel 18. The chain 20 is an example of a chain. The cover 39 is an example of a cover. The lock mechanism 21 is an example of the lock mechanism. The gear 32 is an example of a gear. The stopper 35 is an example of a stopper. The bracket 33 is an example of a bracket. The support shaft 34 is an example of a support shaft. The lock pin 53 is an example of a lock pin. The insertion hole 47 is an example of the insertion hole. The shaft portion 54 is an example of a shaft portion, and the connecting portion 55 is an example of a connecting portion. The wing piece 56 is an example of a wing piece. The notch 48 is an example of the notch.

The sterilizer described in this embodiment is not limited to the one described with reference to the drawings. For example, the spare tire support device may be provided on the vehicle body, or may be provided on a bracket, frame, member, or the like provided on the vehicle body. Further, the center line indicating the rotation center of the chain wheel may be provided along either the front-rear direction of the vehicle or the width direction of the vehicle. That is, the spare tire support device of the present disclosure may have a structure in which an operator rotates a rotation shaft using a wrench from either the side of the vehicle or the rear of the vehicle. The vehicle provided with the spare tire support device may be a truck, a freight vehicle, a dump truck, a trailer, or the like.

The spare tire support device of the present embodiment raises, lowers, and fixes the spare tire below the vehicle body, and can be used in a vehicle having a structure in which the spare tire is suspended and supported.

13 ... Body, 15 ... Spare tire support device, 18 ... Chain wheel, 20 ... Chain, 21 ... Lock mechanism, 32 ... Gear, 33 ... Bracket, 34 ... Support shaft, 35 ... Stopper, 39 ... Cover, 48 ... Notch , 53 ... Lock pin, 54 ... Shaft, 55 ... Connection, 56 ... Wing piece

Claims (1)

A chain wheel that can rotate and stop with respect to the vehicle body,
A chain that is wound around the chain wheel and hangs a spare tire,
The chain wheel and a cover provided so as to surround the chain,
A locking mechanism provided on the outside of the cover and preventing the chain wheel from rotating in the direction of lowering the spare tire.
Have,
The lock mechanism is
The gear connected to the chain wheel and
The support shaft provided on the vehicle body and
A stopper that can rotate within a predetermined angle around the support shaft and is engaged and disengaged from the gear.
Have,
By engaging with the gear, the stopper prevents the chain wheel from rotating in the direction of lowering the spare tire .
The lock mechanism is
With the bracket provided on the car body
A lock pin supported by the bracket and prevented from rotating the stopper engaged with the gear.
With more
The bracket is
Insert hole and
A notch extending vertically from the insertion hole,
Have,
The lock pin is
The shaft part to be inserted into the insertion hole and
A connecting portion protruding from the shaft portion in the radial direction of the shaft portion,
A wing piece protruding from the shaft portion in the radial direction of the shaft portion,
Have,
The connecting portion and the wing piece are provided at different positions in the circumferential direction of the shaft portion.
Spare tire support device.

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