JPS5839413Y2 - Speedometer drive device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a drive device for driving a speedometer of an automobile or the like.

Traditionally, as a drive device for this type of speedometer,
An input shaft is arranged at the rear end of the transmission and is rotated by the main drive shaft (output shaft) of the transmission, and has a rotation axis direction conversion main drive gear such as a worm fixed to the tip, and an input shaft that is connected to the conversion main drive gear of the input shaft at one end. It consists of an output shaft that fixes a driven gear such as a worm wheel that meshes with it, and a speedometer cable attached to the other end that is connected to a speedometer.The input shaft and output shaft control the rotation of the main drive shaft corresponding to the vehicle speed. It is also well known that the information is transmitted to the speedometer via a speedometer cable.

In such a speedometer drive device, when lubricating the connecting part between the input shaft and the output shaft, that is, the rotating shaft direction conversion gear, a grease lubrication method is used in which grease is sealed in the gear chamber and lubricated with grease. ing.

However, with this conventional grease lubrication method, the temperature of the grease tends to rise as the conversion gear rotates, and over a long period of time, the lubrication performance of the grease deteriorates and the durability of the conversion gear deteriorates. Moreover, in order to replenish the grease, the gear chamber must be disassembled, and the grease replenishment and inspection work is troublesome.

The present invention has been developed in view of these points, and by adopting a transmission lubricant supply system in which the conversion gear is lubricated by circulating the lubricant oil used for transmission lubrication, it is possible to reduce the temperature rise. Prevents deterioration of lubricating oil,
Moreover, the lubricating oil supply inspection work can be replaced by the transmission lubricating oil inspection work and can be omitted, thereby improving the durability of the conversion gear and simplifying the inspection work of the speedometer drive. The aim is to provide the equipment.

That is, the present invention includes an input shaft that is rotated by the main drive shaft of the transmission and has a rotating shaft direction converting driving gear fixed to its tip, and a converting driven gear that meshes with the converting driving gear of the input shaft fixed to one end. , and an output shaft to which a speedometer cable is attached at the other end, the input shaft is tilted so that the conversion driving gear faces upward, and the input shaft and output shaft are connected to each other. is supported in a gear sleeve, and the gear sleeve is fixed to the rear cover of the transmission case, the gear chamber in which the rotation axis direction conversion gears that mesh with each other are arranged is sealed, and a spiral strip is attached to the input shaft, and the upper end of the input shaft is It is formed continuously from the lower end part to the upper end part or from the upper end part to the middle part, and communicates the vicinity of the lower end part of the spiral strip with the inside of the main body of the transmission case or the rear cover chamber, and connects the gear chamber and the mission case chamber with the above-mentioned By communicating with the return path opened in the gear sleeve, the lubricating oil in the main body of the transmission case or the rear cover chamber is supplied to the gear chamber by a spiral thread, and is also returned to the mission case chamber via the return path. This is a characteristic feature.

Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings.

In FIGS. 1 to 5, reference numeral 1 denotes a transmission case of an automobile consisting of a case body 2 and a rear cover 3. Inside the transmission case 1, a main drive shaft 4 and a counter shaft 5 are provided.

In addition, 6 is a top cover attached to the upper part of the transmission case main body 2, and 7 is a center brake flange fixed to the main drive shaft 4.

A speedometer drive gear 8 is fixed to a portion of the main drive shaft 4 located in the rear cover chamber 3a between the mission case body 2 and the rear cover 3, and a speedometer drive gear 8 is fixed to the drive gear 8 at one end of an input shaft 10. A driven gear 9 is engaged with the input shaft 10, and a rotating shaft direction conversion main driving gear 11 made of a bevel gear is fixed to the other end of the input shaft 10, and the conversion main driving gear 11 is made of a bevel gear fixed to one end of an output shaft 13. A rotation axis direction conversion driven gear 12 is engaged, and a speed make cable (
A speedometer (not shown) is connected by transmitting the rotation of the main drive shaft 4 corresponding to the vehicle speed of the automobile to the speedometer cable via the input shaft 10 and the output shaft 13. configured to drive.

The input shaft 10 is inclined so that the conversion main driving gear 11 is upward (that is, the driven gear 9 is downward), and both the input shaft 10 and the output shaft 13 are connected to the rear cover 3 of the transmission case 1. The gear chamber 15 is rotatably supported in a gear sleeve 14 fixed to the gear sleeve 14, and a gear chamber 15 is formed in the gear sleeve 14, in which the conversion driving gear 11 and the conversion driven gear 12 that mesh with each other are disposed.
5 is provided in a sealed structure from the outside by fixing a lid body 16 with bolts 17.

In addition, the input shaft 10 has a spiral thread 1 extending from its upper end (the side where the conversion main drive gear 11 is fixed) to the middle part.
B are continuously carved, and near the lower end of the spiral strip 1B (that is, near the middle part of the input shaft 10), gears are sequentially provided in a stepped manner so that the vicinity of the lower end is at the lowest position. Sleeve through hole 1 formed in sleeve 14
9. It is communicated with the inside of the mission case body 2 through a rear cover through hole 20 formed in the rear cover 3 and a case body through hole 21 formed in the mission case body 2.

On the other hand, a return passage 22 is opened in the gear sleeve 14 substantially parallel to the axial direction of the input shaft 10, and the return passage 22 is provided to communicate the gear chamber 15 and the rear cover chamber 3a. .

As described above, the lubricating oil in the transmission case body 2 is allowed to flow into and be stored at the lower end of the spiral thread 18 through the through holes 19 and 20° 21, and further to the input shaft 10.
The gear chamber 15 is moved by the feeding action of the spiral strip 18 as the
At the same time, it is supplied to the rear cover chamber 3 via the return path 22.
It is configured to reflux to a.

Therefore, in the above embodiment, the transmission lubricating oil in the mission case body 2 is scattered into the mission case body 2 by the rotation of the main drive shaft 4, counter shaft 5, etc., and passes through the through holes 19, 20, 21. The liquid flows into the vicinity of the lower end of the spiral thread 18 and is stored therein.

The stored lubricating oil is transferred to the conversion gears 11 and 12 by the feeding action of the spiral thread 18 as the input shaft 10 rotates.
is supplied to the gear chamber 15 in which the conversion gears 11 and 12 are arranged, and after lubricating the conversion gears 11 and 12, it passes through the return path 22 to the gear cover chamber 3a.
It will flow back inside.

Therefore, the conversion gears 11 and 12 can be lubricated by circulating and supplying the lubricating oil while being cooled by the lubricating oil, so there is no deterioration in lubrication performance due to temperature rise as in the conventional grease lubrication system, and the drive device , especially the conversion gear 11,1
2. Durability can be improved.

Further, since the lubricating oil replenishment inspection work can be omitted during the normal transmission lubricating oil inspection, the inspection work can be simplified compared to the grease lubrication system.

FIG. 6 shows another embodiment of the present invention, in which the same parts as in FIG. 19.20.
Instead of flowing through the gear chamber 21, the lubricating oil stored in the rear cover chamber 3a is directly supplied to the gear chamber 15 as it is, thereby obtaining the same effect as in the above embodiment.

That is, in the case of this example, the spiral thread 18' of the input shaft 10' is formed continuously from the upper end to the lower end of the shaft 10', and the spiral thread 18' is formed on the gear sleeve 14. A communication path 23 is formed that communicates with the lower end catcher cover chamber 3a.

The rest of the structure is the same as that of the above embodiment.

In both of the above embodiments, bevel gears are used as the rotating shaft direction conversion gears 11 and 12, but worm gears may be used instead of the bevel gears.

However, if bevel gears are used as the rotating shaft direction conversion gears 11 and 12, it is possible to prevent the worm gear from locking due to reversal and improve wear resistance, and it can also be manufactured from a sintered alloy, reducing costs. This is advantageous in that it can be used for various purposes.

As described above, according to the present invention, in the speed making drive device comprising an input shaft rotated by a main drive shaft of a transmission and an output shaft interlocked with the input shaft via a rotation axis direction conversion gear, Inclining the input shaft and forming a spiral strip on the input shaft to supply lubricating oil in the transmission case to the gear chamber of the axial direction conversion gear provided in a sealed manner within the gear sleeve by the spiral strip; Since it is returned to the transmission case chamber (rear cover chamber) through the return path, the rotational axis direction conversion gear can be lubricated using the transmission lubricating oil, improving the durability of the speedmaking drive device. It is possible to simplify the inspection work.

Furthermore, if the rotating shaft direction conversion gear is configured with a bevel gear, it is possible to improve wear resistance and reduce costs by making it possible to form a sintered alloy, making it possible to provide a low-cost speedometer drive device. It has advantages.

[Brief explanation of drawings]

The drawings illustrate an embodiment of the present invention, in which FIG. 1 is a vertical cross-sectional view in the axial direction of the main drive shaft of the transmission, FIG. 2 is a cross-sectional view taken along the l-1f line in FIG. 1, and FIGS. 2, FIG. 5 is a sectional view taken along the line A in FIG. 4, and FIG. 6 is a view corresponding to FIG. 2 showing another embodiment. 1...Mission case, 2...Case body, 3...Rear cover, 3a...
Rear cover chamber, 4... Main drive shaft, 5... Counter shaft, 6... Top cover 7... Center brake flange,
8...Speedometer drive gear, 9...
...Driven gear, 10, 10'...Input shaft, 11...Rotation axis direction conversion main driving gear, 12...Rotation axis direction conversion driven gear, 13
...Output shaft, 14...
Gear sleeve, 15...Gear chamber, 16...
... Lid, 17... Holt, 18.1B'...
...Spiral thread, 19... Sleeve through hole, 2
0... Rear cover through hole, 21... Case body through hole, 22... Return path, 23...
...Communication path.

Claims (1)

[Scope of utility model registration request] (1) An input shaft that is driven by the main drive shaft of the transmission and has a rotating shaft direction conversion main gear fixed to its tip, a conversion driven gear that meshes with the conversion main gear of the input shaft, fixed to one end, and the other end and an output shaft to which a speedometer cable is attached, the input shaft is tilted so that the conversion main gear faces upward, and the input shaft and output shaft are connected to a gear sleeve. The gear sleeve is fixed to the rear cover of the transmission case, the gear chamber in which the rotational axis direction conversion gears that mesh with each other are arranged is sealed, and a spiral thread is attached to the input shaft from the upper end to the lower end of the input shaft. The spiral strip is formed continuously from the upper end to the middle part, and communicates the vicinity of the lower end of the spiral strip with the inside of the main body of the transmission case or the rear cover chamber, and connects the gear chamber and the mission case chamber within the gear sleeve. The lubricating oil in the main body of the transmission case or the rear cover chamber is supplied to the gear chamber via a spiral thread and is also returned to the transmission case chamber via the return path by communicating with the return path opened in the transmission case. Speedometer drive device (2) Utility model registration claim No. 1 (1) characterized in that the rotating shaft direction conversion gear is constituted by a bevel gear.
) The speedometer drive device described in item 2.