JPH0719058U - Tilt lock device for control equipment of construction machinery - Google Patents

Abstract

(57) [Summary] [Purpose] In a console box that enables tilt position adjustment of construction machinery, it prevents tilt play of the tilt lock mechanism and can absorb variations in assembly precision due to component manufacturing precision. It is an object of the present invention to further improve the assembling workability of the tilt lock device in the control device. [Constitution] In the tilt bracket 4 of the console box, of the two round bosses through which the lock pins 5b pass, the one side round boss 7b is used as a hollow hole to form three stop screws 6
The position was fixed by tightening at three points.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an improvement of a tilt lock device in a control device for a construction machine.

[0002]

[Prior art]

 In order to make it easier to get on and off the operator's cab in construction machinery, the console box is tilted clockwise from the state shown in Fig. 2 as shown in Fig. 1 and locked to expand the boarding gate. In the tilt lock mechanism portion (FIG. 2) of such a console box, dimensional accuracy of each portion of the fixed frame 2, the movable frame 1 and the tilt lock mechanism is required. However, due to the stacking of tolerances such as welding distortion when manufacturing parts, the lock pin of the lock mechanism may not fit into the tooth space. In addition, the parts could not be assembled depending on the combination of parts, or the backlash was large or small, so that the assemblability and the accuracy of parts as a finished product were extremely poor, which was a problem.

[0003]

[Problems to be solved by the device]

 In a console box capable of adjusting the tilt position of a construction machine, we provide a structure that prevents the tilt lock mechanism from rattling and absorbs variations in assembly accuracy due to the accuracy of parts manufacturing. The purpose is to improve the assembly workability of the lock device.

[0004]

[Means for Solving the Problems]

 In the tilt bracket 4 of the console box, out of the two round bosses through which the lock pin 5b passes, the one side round boss 7b is made into a hollow hole and the pin position is not fixed. The position was fixed by tightening the places.

[0005]

[Operation] In the tilt bracket 4, the boss portion 7b on one side through which the lock pin 5b is inserted, is tightened with the fixing screws 6 for fixing the pin 5b from three locations equally divided around the circumference, and the lock pin is adjusted by adjusting the tightening amount. The position of 5b can be adjusted along the entire circumference according to the mating parts.

[0006]

【Example】

 A tilt lock mechanism in a conventionally known console box will be described with reference to FIGS. In the console box A in FIG. 1, the tilt position can be adjusted by rotating the movable frame 1 up and down with respect to the fixed frame 2 with the tilt center O 2 as a fulcrum. At this time, the lock pin on the tilt bracket 4 side is fitted and locked in the tooth groove portion 3 (reference characters A to E in FIG. 1A) on the fixed frame 2 side. The lock pins 5 are set parallel to each other on the tilt bracket 4 of FIG. 3, the upper lock pin 5a is fixed to the movable frame 1 side, and the lower lock pin 5b is fixed to the fixed frame 2 side. It is designed to be locked in the tooth space 3. At this time, since the lock pin 5b is fixed by the set screw 6, the position of the lock pin alone cannot be adjusted, and the parallelism with the tooth groove portion 3 of the fixed frame 2 may not be achieved. It happened.

On the other hand, the present invention has been improved so that the position of the lock pin 5b on the lower side of the tilt bracket 4 (which locks to the tooth groove portion 3) can be adjusted as shown in FIG. The diameter of the lock pin 5b on the lower side of the tilt bracket 4 is, for example, 10 mm, whereas the diameter of the hole on the right side of the boss portion 7 through which the lock pin 5b is inserted is 11 mm, and the entire circumference is provided by the fixing screws 6 from three locations. The misalignment of the 1 mm lock pin can be adjusted in any direction (Fig. 3 (d)) to allow adjustment according to the parallelism of the tooth space 3. Actually, the parallelism of the pin position connecting the movable frame 1 and the fixed frame 2 is deviated due to the manufacturing tolerance. However, according to this invention, even the parts which could not be assembled in the past can be assembled, and the lock pin 5b is loose. It is also possible to adjust the attachment.

When the tilt bracket 4 (FIG. 4) of the present invention is assembled in the console box A as shown in FIG. 2, the tilt bracket rotation center P on the movable frame 1 side and the teeth on the fixed frame 2 side are formed. Some of them cannot be assembled due to the misalignment of the lock pin shaft of the groove 3, and some of them have large backlash. In this case, in the tilt bracket 4 of the present invention, the lock screw 5b is inserted through the boss portion 7b on one side, and the fixing screws 6 for fixing the pin 5b are tightened from three positions equally divided around the circumference, and the tightening amount is adjusted to lock. The position of the pin 5b can be adjusted in all directions according to the mating parts. At this time, the tightening force of the stop screw 6 is constant regardless of the tightening amount (see FIG. 5).

[0009]

【effect】

 In the tilt bracket 4, of the two round bosses through which the lock pin 5b passes, the one side round boss 7b is used as a hollow hole, and the position is fixed by tightening it in three places with three fixing screws 6. I decided to do it. With this configuration, it is possible to prevent the tilt lock mechanism from rattling and to absorb variations in the assembly precision due to the component manufacturing precision, and to further improve the assembly workability of the tilt lock device in the vertical operation device of the construction machine.

[Brief description of drawings]

FIG. 1 shows a known console box, (a) is a front view and (b) is a top view.

FIG. 2 is a perspective view of a mounting position of a tilt lock mechanism and a tilt bracket in a console box.

FIG. 3 is a positioning mechanism for a known tilt bracket.

FIG. 4 is a tilt bracket positioning mechanism according to the present invention.

FIG. 5 is a mechanism for adjusting the position of the tilt bracket and the lock pin.

[Explanation of symbols]

A Console box 1 Movable frame 2 Fixed frame 3 Tooth groove part 4 Tilt bracket 5, 5a, 5b Pin 6 Stop screw 7a, 7b Boss part

Claims (1)

[Scope of utility model registration request] 1. A lock pin for a tilt bracket (4) of a console box in a control device for a construction machine.
Of the two round bosses through which (5b) passes, the inner diameter of the round boss (7b) on one side was made a fool hole, and the position was fixed by tightening it in three places with three fixing screws (6). A tilt lock device for a control device of a construction machine.