JP2000180306A - Method and device for testing parking mechanism of automatic transmission - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make the constitution of a testing device simple and inexpensive, to make its space small, and to reduce impressed torque. SOLUTION: A disk 23 is mounted at one end of an output shaft 4, and the disk 23 is braked by a brake part 24 to lock the output shaft 4. In addition, a connecting rod 13 is connected to the end part of an output shaft 3 via a clutch, and a rotating force is added to a pinion 16 mounted on the connecting rod 13 by a cylinder 18 via a rack 17 to impress torque on the output shat 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a test method and a test apparatus for a parking mechanism of an FF type automatic transmission.

[0002]

2. Description of the Related Art FIG. 3 shows a configuration of a conventional FF type automatic transmission parking mechanism testing apparatus, and 1 is an F-type automatic transmission.
This is an F-type automatic transmission and has a differential gear (differential gear) 2. Reference numerals 3 and 4 denote a pair of output shafts protruding from both sides of the differential gear 2. The output shafts 3 and 4 are connected to gearboxes 5 and 6, respectively. Application section 8
Are connected. Reference numeral 9 denotes a connection shaft for connecting the respective gearboxes 5 and 6 to apply torque equally to the output shafts 3 and 4, and reference numeral 10 denotes an input shaft for inputting a rotation input from the engine to the automatic transmission 1.

An automatic transmission 1 has an input shaft 10
Speed of the rotation input from the engine input through the
This rotation is output to the pair of output shafts 3 and 4 via the differential gear 2 to transmit the rotation to the left and right wheels. When parking, the parking pawl meshes with the built-in detent parking gear, The output shafts 3 and 4 do not rotate. Therefore, it is necessary to confirm that the parking pawl is securely meshed, and that even if torque is applied to the output shafts 3 and 4, the meshing does not come off and the output shafts 3 and 4 do not rotate. Therefore, the torque applying unit 8 is connected to the left and right output shafts 3 and 4 via the transmission mechanism including the gearboxes 5 and 6, the connecting shaft 9 and the transmitting shaft 7, and the torque from the torque applying unit 8 is transmitted to the left and right output shafts 3 and 4. In addition to the output shafts 3 and 4 via the mechanism, the output shafts 3 and 4 were tested for rotation. Note that a chain, a belt, or the like may be used instead of the gear boxes 5, 6, and the like.

[0004]

However, in the above-described conventional parking mechanism testing apparatus, two sets of output shafts 3, 4 and the torque applying section 8 are connected via a transmission mechanism. A transmission mechanism was required, the configuration was complicated, and expensive and space was required, and the torque applied from the torque applying unit 8 was also large.

The present invention has been made to solve the above-described problems, and has an automatic transmission which is simple in construction, inexpensive, small in space and small in torque applied from a torque applying unit. It is an object of the present invention to obtain a parking mechanism test method and apparatus.

[0006]

According to a first aspect of the present invention, there is provided a parking mechanism testing method for an automatic transmission, which locks one output shaft and applies torque to the other output shaft when the parking mechanism is parked. It was made.

According to a second aspect of the present invention, there is provided a parking mechanism testing apparatus for an automatic transmission, which locks one output shaft when the parking mechanism is parked, and applies a torque to the other output shaft when the parking mechanism is parked. Is provided.

According to a third aspect of the present invention, in the parking mechanism testing apparatus for an automatic transmission, the lock unit includes a disk mounted on one output shaft and a brake unit for braking the disk.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show a schematic front view and a perspective view, respectively, of a parking mechanism testing apparatus for an automatic transmission according to this embodiment, in which 11 is a bearing of the output shaft 3, 12 is a disk attached to an end of the output shaft 3,
Reference numeral 13 denotes a connecting shaft rotatably supported by a bearing 14, reference numeral 15 denotes a brake portion attached to an end of the connecting shaft 13, and engages with the disk 12, reference numeral 16 denotes a pinion attached to the connecting shaft 13, and reference numeral 17 denotes a pinion 16. And 18 are cylinders driven by hydraulic pressure or pneumatic pressure, and are connected to the rack 17. 19 and 20 are cylinders 18
The pressure gauge (torque gauge) provided in the
0 forms a torque application section. Also, the disk 12
And the brake part 15 form a clutch part.

Reference numerals 21 and 22 denote bearings for rotatably supporting the output shaft 4, reference numeral 23 denotes a disk attached to an end of the output shaft 4, and reference numeral 24 denotes a brake portion for braking the disk 23. The lock portion is formed by the portion 24.

In the above configuration, when testing the parking mechanism, the parking mechanism in the automatic transmission 1 is in a parking state, that is, the parking pawl is engaged with the parking gear, and the output shaft 4 is locked by braking the disk 23 by the brake unit 24. .

On the other hand, when the brake unit 15 locks the disc 12 with the brake unit 15 by operating the brake unit 15 and linearly moves the rack 17 by driving the cylinder 18, the pinion 16 meshed with the rack 17 rotates. The torque is transmitted to the output shaft 3 through the clutch 13 and the clutch unit, and torque is applied to the output shaft 3. At this time, since the output shaft 4 is locked, a torque twice as large as the applied torque is applied to the parking mechanism by the differential of the differential gear 2. As a result, if the output shaft 3 rotates, the parking mechanism is determined to be defective, and if the output shaft 3 does not rotate, the parking mechanism is determined to be normal.

In the above embodiment, the torque applying section only needs to apply the torque to one of the output shafts 3, so that the transmission mechanism therebetween is also simplified, the overall configuration is simplified, and the cost and space are reduced. . Further, since the applied torque from the torque applying unit is doubled and applied to the parking mechanism by the differential of the differential gear 2, the applied torque from the torque applying unit may be half of the normal torque. Is simplified.

[0014]

As described above, according to the present invention, at the time of testing the parking mechanism, one of the output shafts is locked and torque is applied to the other of the output shafts. The transmission mechanism between the parts is simplified, the overall structure is simple and inexpensive, and the space is reduced. In addition, the torque applied from the torque applying unit can be reduced to half the conventional torque by the differential of the differential gear, and the configuration of the torque applying unit can be simplified.

[Brief description of the drawings]

FIG. 1 is a front view of a parking mechanism testing apparatus for an automatic transmission according to the present invention.

FIG. 2 is a perspective view of a parking mechanism testing device for an automatic transmission according to the present invention.

FIG. 3 is a configuration diagram of a conventional device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Auto transmission 2 ... Differential gear 3,4 ... Output shaft 12,23 ... Disk 13 ... Connection shaft 15,24 ... Brake part 16 ... Pinion 17 ... Rack 18 ... Cylinder

Claims (3)

[Claims] 1. A parking mechanism test method for an automatic transmission, comprising: a pair of output shafts connected via a differential gear; and a parking mechanism for disabling rotation of each of the output shafts by gear coupling during parking. A method for testing a parking mechanism of an automatic transmission, wherein one of the output shafts is locked during parking and a torque is applied to the other output shaft. 2. An automatic transmission having a parking mechanism in which a pair of output shafts are connected via a differential gear and the rotation of each output shaft is disabled by a gear coupling during parking, one of the output shafts when the parking mechanism is parked. A parking mechanism testing device for an automatic transmission, comprising: a lock section for locking the vehicle; and a torque application section for applying torque to the other output shaft when the parking mechanism is parked. 3. The automatic transmission parking mechanism testing apparatus according to claim 2, wherein said lock portion comprises a disk mounted on one output shaft, and a brake portion for braking the disk.