JPH0685169U - Drive wheel pushing device that facilitates spring replacement - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a device capable of easily replacing a spring for pressing a drive wheel of a carrier vehicle against a floor. The drive wheel pressing device 10 includes a tilt link 41 that is tiltably provided on the vehicle body 14, and a bolt 42 and a nut 43 that are provided between the vehicle body 14 and the tilt link 41 and that adjust the tilt angle of the tilt link 41. , 43, and a pressing link 44 that is rotatably provided on the tilting link 41 and has a spring 45 stretched between one end and the vehicle body 14 and pressing the drive wheel 13 against the floor F at the other end. When replacing the spring 45, change the tightening amount of the nut 43 and change the tilting link 41.
When tilting the spring by pulling the spring 45, the tilting link 41
The upper pressing link 44 also moves integrally by being pulled by the spring 45, and the spring 45 approaches the free length. by this,
It can be easily replaced with a new spring.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a device for pressing the drive wheels of a transport vehicle against the floor.

[0002]

[Prior art]

 2. Description of the Related Art Conventionally, as one type of transport vehicle, there is a transport vehicle (not shown) configured such that the weight of the transported object is applied only to the traveling wheels and the weight is not applied to the drive wheels. The drive wheels are provided on the vehicle body of the vehicle so as to be tiltable in the vertical direction, and are pressed against the floor by a constant force regardless of the weight of the article to be driven by a motor or the like to drive the vehicle. . In this case, springs are used as a means of pressing the drive wheels against the floor. Further, in the case of a transport vehicle for transporting heavy goods, the above-mentioned constant force must be increased, and a spring having relatively strong elasticity is used.

[0003]

[Problems to be solved by the device]

 However, such a carrier has the following problems. (1) When a spring is built into a carrier, the carrier must be lifted from the floor, and a crane, hydraulic jack, and other devices that lift the entire carrier are required. (2) If the spring is installed without lifting the carrier, a pit must be formed on the floor for workers to enter under the carrier. (3) If a pit is formed on the floor, the spring can be installed only at the pit.

[0004]

[Means for Solving the Problems]

 The present invention is a drive wheel pressing device for pressing a drive wheel of a carrier vehicle having traveling wheels for supporting a vehicle body onto a floor by a spring, wherein a tilting link provided on the vehicle body so as to be tiltable and a tilting link rotating on the tilting link. And a tilting link provided between the vehicle body and the tilting link, the spring being stretched between one end and the vehicle body, and the other end pressing the drive wheel against the floor. The above problem has been solved by a device having a bolt and nut for receiving.

[0005]

[Action]

 In the assembled state, the spring pulls the push link to push the drive wheel to the floor at the other end of the push link while pulling the tilting link via the push link. However, the tilt link is fixed because it is received by the nut and the tilt is restricted. Therefore, the pressing link is pulled by the spring and tilts on the tilting link, and the drive wheel is strongly pressed against the floor at the other end. The force that pushes the drive wheel against the floor is adjusted by adjusting the tightening of bolts and nuts.

When replacing the spring, if the tightening amount of the bolts and nuts is changed and the tilting link is tilted by the pulling of the spring, the pressing link on the tilting link is also pulled by the spring and moves. , The spring approaches the length of free length. As a result, replacement with a new spring can be easily performed.

[0007]

【Example】

 Hereinafter, an embodiment of the present invention will be described with reference to FIGS. The drive wheel pressing device 10 is incorporated in the transport vehicle 11 (see FIG. 4). The transport vehicle 11 is configured such that the weight of the transported article W is applied only to the traveling wheels 12, and the drive wheel 13 is not weighted. The transport vehicle 11 automatically travels according to a predetermined course on the floor F by the drive wheels 13 pressed against the floor F with a constant force, regardless of the weight of the loaded articles W. It is an automated guided vehicle.

The drive wheels 13 (see FIGS. 1 and 2) are attached to the vehicle body 14 of the transport vehicle 11 via a rotating bracket 20 and a tilting bracket 21. A drive wheel 13 and a drive motor 22 that drives and rotates the drive wheel 13 are attached to the rotation bracket 20. A rotary shaft 26 on the rotary bracket 20 is rotatably provided on the tilt bracket 21. Further, the tilting bracket 21 is provided with a direction changing motor 27 that changes the direction of the drive wheels 13. Sprockets 28, 28, 29, 29 and chains 30, 30 are provided between the direction changing motor 27 and the rotating bracket 20. Furthermore, the tilt bracket 21 is tiltably provided on the vehicle body 14 of the transport vehicle 11 by a pin 31 (see FIG. 1).

Therefore, the drive wheel 13 is driven and rotated by the drive motor 22 and is changed in direction by the direction changing motor 27. Further, the drive wheel 13 is tilted toward the floor F around the pin 31.

The drive wheel pressing device 10 is a device that presses the drive wheels 13 against the floor F with a constant force regardless of the weight of the articles W loaded on the vehicle 11. The drive wheel pressing device 10 is composed of a tilting link 41, a bolt 42, nuts 43 and 43, a pressing link 44, a spring 45 and the like. A pair of these parts are provided as shown in FIG.

The tilting link 41 is tiltably provided on the vehicle body 14 by a horizontal shaft 50. The tilt link 41 is formed in a U shape as shown in FIG. The bolt 42 is suspended from the vehicle body 14 by a pin 51 so as to be tiltable. The nut 43 is screwed into the bolt 42 and receives the flat plate 52 of the tilting link 41. Two nuts 43 are provided so as not to loosen. The pressing link 44 is rotatably provided on a horizontal shaft 53 on the tilting link 41. A spring 45 is stretched between the pin 54 on one end of the pressing link 44 and the spring bracket 46. The spring bracket 46 is fixed to the vehicle body 14. A roller 55 that comes into contact with the tilt bracket 21 is provided at the other end of the pressing link 44.

In the assembled state (see FIG. 1), the spring 45 pulls the pressing link 44 to bring the roller 55 on the pressing link 44 into pressure contact with the tilting bracket 21, and the tilting link 41 via the pressing link 44. Is also towing. However, since the tilt link 41 is received by the nut 43 and its tilt is regulated, the tilt link 41 is in a fixed state. Therefore, the pressing link 44 is pulled by the spring 45 and tilts on the tilting link 41 about the shaft 53, and the roller 55 presses the tilting bracket 21 toward the floor F, so that the drive wheel 13 is moved to the floor F. It is pressing. When the tightening amount of the nut 43 is changed, the inclination of the tilting link 41 is changed, and the force with which the pressing link 44 presses the drive wheel 13 against the floor can be adjusted.

When the spring 45 is replaced (see FIG. 3), the nut 43 is moved toward the tip of the bolt 42, and the bolt 42 and the tilting link 41 are allowed to be pulled by the spring 45 and tilted. The upper pressing link 44 is also pulled and moved integrally with the spring 45, and the spring 45 approaches the length of the free length. This makes it easy to replace it with a new spring.

[0014]

[Effect of device]

 The drive wheel pressing device of the present invention has the following effects. (1) The spring can be easily installed and replaced simply by adjusting the tightening amount of the bolts and nuts. (2) By adjusting the tightening of bolts and nuts, it is possible to easily adjust the force with which the drive wheel is pressed against the floor. (3) It is easy to install or replace the spring, or adjust the force to push the drive wheel to the floor without raising the carrier from the floor or limiting it to the pit location. Can be done

[Brief description of drawings]

FIG. 1 is a front view of a drive wheel pressing device of the present invention.

FIG. 2 is a left side view of FIG. 1 and is a partial cross-sectional view.

FIG. 3 is a view showing a state where a spring of the drive wheel pressing device is loosened.

FIG. 4 is a front view of a carrier vehicle.

[Explanation of symbols]

 F floor 10 drive wheel pressing device 11 transport vehicle 12 traveling wheel 13 drive wheel 14 vehicle body 41 tilting link 42 bolt 43 nut 44 pressing link 45 spring

Claims (1)

[Scope of utility model registration request] 1. A drive wheel pressing device for pressing a drive wheel of a carrier vehicle having traveling wheels for supporting a vehicle body against a floor by a spring, wherein the vehicle body is provided with a tilting link tiltably provided on the vehicle body and rotated by the tilting link. A pressing link which is provided between the vehicle body and the tilting link, and the spring is stretched between one end and the vehicle body and presses the drive wheel against the floor at the other end; and the tilting link is received between the vehicle body and the tilting link. A drive wheel pressing device having a bolt and a nut.