JPH0443629Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention relates to industrial vehicles, and in particular to a connecting rod between a shift lever and a transmission that prevents engine vibrations from being transmitted to the shift lever. .

[Prior Art] As shown in FIG. 3, in a conventional general industrial vehicle equipped with a torque converter, a shift lever 3 attached to a support bracket 2 of a machine frame 1 is connected to a connecting rod 4, a link 5, and a connecting rod 6. Via
It is connected to the gear shift lever 8 of the torque converter 7. Further, the torque converter 7 is fixed to the engine 9 body.

[Problems to be solved by the invention] In the conventional configuration as described above, vibrations from the engine 9 are transmitted from the torque converter 7 to the shift lever 3 via the connecting rods 4, 6 and the link 5, and the shift lever 3 also vibrates. . Therefore, there was a possibility that the driver would feel uncomfortable. In particular, in diesel engine vehicles, the vibration of the engine tends to be large, so the vibration of the shift lever also tends to be large.

Follow. The purpose of this invention is to solve these problems.

[Means for Solving the Problems] According to this invention, in a connecting rod for connecting a transmission and a shift lever, a first rod having a cylindrical member integrally molded at one end; a second rod whose end is inserted into the member in a non-contact state and extends coaxially with the first rod; a cushioning material filled in a gap between the cylindrical member and the second rod; a flange provided on the shaft of the rod; a stopper member attached to the first rod so as to engage the flange when the first rod and the second rod are pulled; The connecting rod for preventing shift lever vibration is characterized in that when the first rod and the second rod are pressed together, the base of the cylindrical member and the tip of the second rod come into contact with each other.

[Function] The connecting rod according to this invention described above can isolate vibrations from the engine without impairing normal operability.

[Embodiment] Hereinafter, a preferred embodiment of a connecting rod for preventing shift lever vibration will be described in detail with reference to the drawings.

Note that the same or equivalent parts as in the conventional configuration will be described using the same reference numerals.

In FIG. 1, the shift lever 3 is attached to the support bracket 2 of the machine frame 1 so as to be tiltable forward and backward, as in the conventional case, and is attached to the engine 9 via the connecting rod 4, link 5, and connecting rod 10. It is connected to the torque converter 7.

As clearly shown in FIG. 2, the connecting rod 10 on the torque converter 7 side is the end of the front rod 11, which is composed of a front rod (first rod) 11 and a rear rod (second rod) 12 that extend coaxially. A cylindrical member 13 is integrally molded in the portion, and the opposing ends of the rear rod 12 are inserted into this cylindrical member 13 in a non-contact manner. A radial gap between the cylindrical member 13 and the rear rod 12 is filled with a cushioning material 14 such as rubber, which is heat-bonded.

Further, a flange 15 is provided on the shaft portion of the rear rod 12 slightly away from the cylindrical member 13, and a cap 16 is loosely fitted onto the rear rod 12 at a certain distance from the flange 15. This cap 16 is screwed into a female threaded portion of a pipe 17 fixed to the outer periphery of the cylindrical member 13, and is integrated with the front rod 11. When the front rod 11 and the rear rod 12 are pulled, the opposing surfaces of the flange 15 and the cap 16 engage, and the cap 16 functions as a stopper member for the rear rod 12. In addition, the rubber boot 18 is placed over the pipe 17 from above the cap 16, and the pipe 1
It is preferable to keep the inside of 7 sealed.

In this configuration, when the engine 9 is moved, vibrations of the engine 9 are transmitted to the rear rod 12 of the connecting rod 10 via the torque converter 7, but these vibrations are damped by the buffer material 14 of the connecting rod 10. Therefore, almost no vibration of the engine 9 is transmitted to the shift lever 3, and the vibration of the shift lever 3 becomes extremely small.

Next, a case will be described in which the shift lever 3 is tilted forward or backward for driving operation. First, when the shift lever 3 is tilted forward and the front rod 11 is pulled forward via the connecting rod 4 and link 5, the flange 15 and the cap 16 engage, and the rear rod 12 also engages with the front rod 11. Move forward as one. On the contrary, front rod 1
If 1 is moved backwards, the rear rod 12
and the base of the cylindrical member 13 (i.e.,
The end surface of the front rod 11 is in contact with the rear rod 12, and the rear rod 12 is pushed rearward. still,
In the no-load state, as shown in FIG. 2, gaps 19 and 20 are formed between the flange 15 and the cap 16 and between the end faces of the front rod 11 and rear rod 12, respectively.
9 and 20 provide appropriate play when tilting the shift lever 3. Therefore, even when using the connecting rod 10 according to this invention, the shift lever 3 can be operated in the same way as in the conventional case.

In this embodiment, the connecting rod 10 for preventing shift lever vibration is attached to the torque converter 7 side, where large vibrations are transmitted, but it is easily possible to attach the connecting rod according to this invention to the shift lever 3 side. be understood.

Further, it can be used not only for automatic transmissions such as torque converters, but also for general gear-mesh type manual transmissions to reduce vibrations of shift levers.

[Effects of the invention] As described above, according to this invention, vibrations transmitted from the transmission can be damped by interposing a cushioning material such as rubber in the connecting rod that connects the transmission and the shift lever. , it is possible to significantly reduce the vibration of the shift lever, eliminate driver discomfort, and improve operability.

[Brief explanation of the drawing]

Fig. 1 is a schematic explanatory diagram showing the state of connection between a torque converter and a shift lever using a coupling rod for preventing shift lever vibration according to this invention, and Fig. 2 is an enlarged cross-section of the coupling rod of this invention in Fig. 1. FIG. 3 is a schematic explanatory view showing a state in which a conventional shift lever and a torque converter are connected. In the figure, 3...shift lever, 4, 6, 10...connection rod, 7...torque converter, 9...engine, 11...
...Front rod (first rod), 12... Rear rod (second rod), 13... Cylindrical member,
14...Buffer material, 15...Flange, 16...Cap (stopper member).

Claims (1)

[Scope of utility model registration request] A connecting rod for connecting a transmission and a shift lever includes a first rod having a cylindrical member integrally molded at one end thereof, and a first rod having an end portion inserted into the cylindrical member in a non-contact state, and a first rod having a cylindrical member integrally molded at one end; a second rod extending coaxially with the first rod; a cushioning material filled in a gap between the cylindrical member and the second rod; and a flange provided on the shaft of the second rod. a stopper member attached to the first rod to engage the flange when the first rod and the second rod are pulled; A connecting rod for preventing shift lever vibration, wherein the base of the cylindrical member and the tip of the second rod come into contact with each other when the two rods are pressed together.