JP2553922B2 - Power transmission device in internal combustion engine test apparatus - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an internal combustion engine test apparatus used for interlocking an output shaft of a test apparatus and a main shaft of the internal combustion engine when performing a performance test of the internal combustion engine. The power transmission device in.

2. Description of the Related Art Conventionally, as a power transmission device of this type, for example, the configuration disclosed in Japanese Patent Laid-Open No. 59-94034 has been provided. That is, in this conventional type, a horizontally oriented disc is attached to an output shaft that is interlocked with a motor through an elastic coupling tool, and the disc is configured to be movable toward and away from a ring gear attached to a main shaft of an internal combustion engine. Attaching the front-rear direction shaft that fits inside the main shaft by approaching the ring gear side at the center of the disc, and fitting the cylinder body outside the front-rear direction shaft, the slide body that can slide back and forth on the cylinder body is installed. It is fitted externally, a rotary plate is attached to this sliding body, a swing rod that can swing back and forth is attached to the front side of this slide plate, and the inner end of this swing rod and the longitudinal axis can swing relative to each other. An engaging portion that is connected to the ring gear is provided at the outer end of the swing rod so as to be engaged with the ring gear by swinging forward, and a drive device that slides the slide body back and forth is provided.

According to this conventional type, the disc is opposed to the ring gear in a state in which the sliding body is slid back and forth with respect to the longitudinal axis by the drive device, and the swing rod is swung so that the upper end thereof is located rearward. After that, by moving the disc closer to the ring gear, the tip of the front-rear direction shaft can be fitted in the main shaft, and at the same time, the engaging portion can be positioned on the outer side of the ring gear.
Then, the sliding body is moved forward by the driving device, and the swinging rod is swung so that the outer end of the swinging rod moves toward the front inward direction, whereby the engaging portion is engaged with the ring gear. With this, the output shaft and the main shaft are interlocked.

According to the above conventional type, when the engagement portion is engaged with the ring gear and the rotation of the output shaft is transmitted to the main shaft, it occurs between the valley portion of the ring gear and the engagement portion. Due to the gap, a tapping sound or a shock is generated between the ring gear and the engaging portion.
In this case, the operator or the device confirms the sound of the internal combustion engine to determine whether the internal combustion engine is operating normally. If it is spread and spread, it cannot be accurately grasped.

An object of the present invention is to provide a power transmission device in an internal combustion engine test device capable of absorbing impact noise and impact.

Means for Solving the Problems In order to achieve the above-mentioned object, a power transmission device in an internal combustion engine test apparatus of the present invention has an output shaft interlocked with a drive device, and a movable body which is movable only along an axial center of the output shaft. Then, on the movable body side, a ring gear attached to the main shaft of the internal combustion engine is provided with an engagement tool that can be engaged and disengaged from the outer peripheral side, and the engagement tool is attached to the operation member and the operation member via a resin member. It is composed of nails.

According to the configuration of the present invention, when the claw body is engaged with the ring gear and the rotation of the output shaft is transmitted to the main shaft, the engaging portion is formed by the gap formed between the valley portion of the ring gear and the claw body. When a tapping sound or impact is generated, the tapping sound or impact is immediately absorbed by the resin member and is not transmitted or diffused.

Embodiment One embodiment of the present invention will be described below with reference to the drawings.

Reference numeral 1 denotes a base frame, which is composed of a horizontal plate portion 1A and a vertical plate portion 1B, and a plurality of guide rods 2 are continuously provided forward from the vertical plate portion 1B. An output shaft 3 is arranged so as to penetrate through the central portion of the vertical plate portion 1B. The output shaft 3 is supported by a bearing 4 so as to be rotatable only. Passive sprocket 6 is attached via
A drive sprocket 8 which is in a linked state with the passive sprocket 6 via a chain 7 is attached to a drive shaft 10 of a drive device 9 including a motor and a speed reducer. A body 11 to be detected is provided on the outer circumference of the passive sprocket 6, and a proximity switch 12 facing the body 11 to be detected is provided with a vertical plate portion.
It is provided in 1B and is thus configured to detect the rotation of the output shaft 3. A cylindrical head cover 13 on which the output shaft 3 is fitted.
Is supported and guided by the guide rod 2 via the bracket 14, and the guide rod support member 15 from the lateral plate portion 1A.
Is urged to move forward by a spring 16 provided between the bracket 14 and the bracket 14. The head cover 13
A ring-shaped housing 18 is fitted into the end portion of the vertical plate portion 1B side via a bearing 17, and the housing 18 is rotatable around an output shaft axis 19. A brake disc 20, a brake 21, and the like are arranged between the rear surface of the housing 17 and the vertical plate portion 1B. A portion of the output shaft 3 in front of the vertical plate portion 1B is formed into a spline shaft portion 3a, and a spline cylinder 22 is spline fitted therein. The tubular movable body 24 that is fitted onto the spline tube 22 and is connected by the key 23 is movable along the output shaft axis 19 together with the spline tube 22, and the movement is performed by the movable body 24. This can be achieved by attaching the slide ring 26 to the rear end via the bearing 25 and swinging the shift fork body 27 interlocking with the slide ring 26 with the cylinder device 28 provided in the lateral plate portion 1A. Furthermore, the movable body 24 is fitted inside the housing 17,
A slide key 29 is interposed between 24 and 17. And movable body
A stopper 41 capable of receiving the front surface of the housing 18 is provided on the front surface of 24. Engaging tools 30 are provided on the front surface of the housing 18 at a plurality of positions at equal angular intervals in the circumferential direction, in the embodiment, at three positions at an angle of 120 degrees. That is, on the front surface of the housing 18, a channel-shaped bracket 31 consisting of a board portion 31a and a pair of left and right side plate portions 31b is attached via a plurality of bolts 32 that pass through the board portion 31a, and at that time, the bracket
31 is open in the radial direction and the front surface. Elongated penetrating parts 33 are formed in the both side plate parts 31b in the radial direction.
A common bottle 35 is inserted into a slide bush 34 located inside 33. The operating member 36 of the engaging member 30 is provided between the both side plate portions 31b.
Is located, and the base end of the actuating member 36 is fitted onto the pin 35 via a bush 37. The base end surface of the actuating member 36 is parallel to the front surface of the substrate portion 31a, and the shim 38 is interposed between the opposite surfaces, so that the actuating member 36 is slidable in the radial direction. The outer ends of the links 39 are attached to both ends of the pin 35, and the inner ends of both the links 39 are attached to the flange plate portion 24a integrally projecting from the front surface of the movable body 24 via bolts and nuts 40. It is swingably connected. The actuating member 36 is made of metal, and has a free end formed with a recess 45 that is open to the inside and the front. A centrifugal weight 42 is attached in the middle of the front surface of the movable body 24 where the bracket 31 is attached.

A claw member 46 is provided in the recess 45 through a vibration damping resin member.
Is attached. That is, the pawl 46 is made of metal and is composed of an elongated plate-shaped mounting portion 46a and a pawl portion 46b located at the free end of the mounting portion 46a. The pawl portion 46b has a V-shape protruding inward. It is formed. An elliptical through hole 47 is formed in the mounting portion 46a, and a core 48 that is fitted into the through hole 47 with a sufficient clearance is abuttable on the inner surface of the mounting portion 46a. The flange portion 48a is integrally formed. An inner resin member 49A made of polyether or the like is formed by pouring in the oval ring-shaped gap formed in the through hole 47 by inserting the core body 48, and the mounting portion 4
A U-shaped outer resin member 49B in plan view is formed by casting from both side surfaces of 6a to the rear surface. Further, a resin plate 50 is applied to the outer surface of the core 48, and the plate 50 is in a state of sandwiching both the resin members 49A and 49B with the flange portion 48a, and is integrated during the casting process. It A plurality of (two) bolt holes 51 are formed from the core body 48 to the plate 50, and screw holes 52 that match the bolt holes 51 are formed at the free end of the operating member 36. Therefore, the claw body 46 in which both the resin members 49A and 49B are integrated is fitted into the recess 45, and the bolt (an example of a fixture) 53 passed through the bolt hole 51 is fitted into the screw hole 52, whereby the claw body 46 is It can be attached and removed freely. Reference numeral 54 is a ring gear attached to a main shaft 55 on the internal combustion engine 56 side.

 Next, the power transmission action in the above embodiment will be described.

Before the engagement, the shift fork body 27 is swung to the vertical plate portion 1B side due to the contraction of the cylinder device 28, whereby the movable body 24 is moved to the vertical plate portion 1B side and the housing 18 via the stopper 41. Also, the head cover 13 is moving against the spring 16. Since the link 39 is in the upright state, the engaging tool is inserted through the slide bush 34 and the pin 35.
30 is moving out. In this state, the output shaft 3
The internal combustion engine 56 is installed so that 55 face each other and are located concentrically. When the cylinder device 28 is extended, the shift fork body 27 swings forward, so that the movable body 24 advances while the spline cylinder 22 is guided by the spline shaft portion 3a. At the time of this forward movement, the stopper 41 tends to separate from the housing 18, but since the head cover 13 is biased forward by the spring 16 at this time, this head cover 13
Will integrally move forward, and thus the upright state of the link 39 will be maintained. By such forward movement, the front end of the head cover 13 first comes into contact with the front surface of the internal combustion engine 56 as shown by the phantom line in FIG. 1, and the forward movement of the head cover 13 is blocked. When the movable body 24 is further advanced, the third
Bolt nut 40 against pin 35 as shown in phantom
Is located in the front, the link 39 is inclined,
Pin through slide bushing 34 located in penetration 33
35 will move inward. Then, the engaging tool 30 translates inward while being guided by the shim 38, thereby engaging the claw portion 46b with the ring gear 54 from the outside. As a result, the rotation of the drive shaft 10 in the drive device 9 causes the drive sprocket 8, the chain 7, the passive sprocket 6, the cam clutch 5, the key 23 of the output shaft 3, the movable body 24, the sliding key 29, the housing 18, and the bracket 31 to rotate. Is transmitted to the engagement tool 30 via the claw portion 46b and the ring gear 54, and further transmitted to the main shaft 55.

In this way, when the pawl 46 is engaged with the ring gear 54 and the rotation of the output shaft 3 is transmitted to the main shaft 55, the engaging portion is formed by the gap formed between the valley portion of the ring gear 54 and the pawl portion 46b. When a tapping sound or a shock is generated, the tapping sound or the shock is immediately absorbed by both resin members 49A and 49B, and is not transmitted and diffused through the operating member 36.

When the claw 46b of the claw 46 is worn or damaged, the bolt 5
The claw 46 can be removed together with the center core 48 by removing the claw 3, and a new claw 46 can be fitted into the recess 45 and then fixed by the bolt 53. This makes it possible to replace the worn or damaged nail 46 easily and inexpensively. Further, the claw 46 is divided into two parts so that only the tip of the claw 46 that meshes with the ring gear 54 is divided into two parts so that the tip part of the claw 46 can be replaced without replacing the claw 46 with the core 48. Good.

In the above example, the bracket using the link 39, etc.
By the structure of the 31 part, the engagement tool 30 is translated inward, and according to this, the ring gear 54, which changes according to the type of the internal combustion engine 56, is always brought into surface contact to ensure reliable engagement. You can That is, in the conventional swinging engagement, the surface contact is not reliably performed due to the diameter change of the ring gear, and in the worst case, the point contact is engaged.

Advantageous Effects of Invention According to the present invention having the above-described configuration, when the claw body is engaged with the ring gear to transmit the rotation of the output shaft to the main shaft, the gap generated between the valley portion of the ring gear and the claw body causes the engagement. When a tapping sound or impact is generated at the joint, the tapping sound or impact can be immediately absorbed by the resin member, and transmission and diffusion can be prevented. Therefore, for example, the operator can correctly confirm the operating sound of the internal combustion engine.

[Brief description of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a vertical sectional side view,
FIG. 2 is a partially cutaway front view, FIG. 3 is a side view of an engagement tool mounting portion, FIG. 4 is a partially cutaway side view of a claw body mounting portion, and FIG. 5 is A- in FIG. A view from the arrow A, FIG. 6 is a view from the same arrow B, FIG. 7 is a view from the same arrow C, FIG. 8 is a view from the same DD, and FIG. 9 is a view from EE in FIG. It is a figure. 1 ... Base frame, 2 ... Guide rod, 3 ... Output shaft,
3a ...... Spline shaft, 9 ... Drive device, 13 ... Head cover, 16 ... Spring, 18 ... Housing, 19 ... Output shaft axis center, 22 ... Spline tube, 24 ... Movable body, 27 ... … Shift fork body, 28 …… Cylinder device, 29 …… Slip key, 30 …… Engagement tool, 31 …… Bracket, 33 …… Penetration part,
34 …… Slide bush, 35 …… Pin, 36 …… Operating member, 39 …… Link, 40 …… Bolt / nut, 41 …… Stopper, 45 …… Recess, 46 …… Pawl, 46b …… Pawl , 48 ……
Inner core, 49A ... Inner resin member, 49B ... Outer resin member,
50 …… Plate, 53 …… Bolt, 54 …… Ring gear, 55
…… Spindle, 56 …… Internal combustion engine.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Toru Kimura 1 Toyota-cho, Toyota-shi, Aichi Prefecture Toyota Motor Co., Ltd. (72) Inventor Toshihiko Kato 3-2-11 Minejima, Nishiyodogawa-ku, Osaka-shi, Osaka In Daifuku (56) References JP-A-59-94034 (JP, A)

Claims (1)

(57) [Claims] Claim: What is claimed is: 1. An output shaft interlocking with a drive device is externally fitted with a movable body which is movable only along the axial center, and the movable body side can be engaged with and disengaged from a ring gear mounted on a main shaft of an internal combustion engine from the outer peripheral side. A power transmission device in an internal combustion engine test apparatus, comprising: an engaging member, the engaging member including an actuating member and a pawl attached to the actuating member via a resin member.