JPH0624721Y2 - Thrust clearance measuring device - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a transmission input shaft,
The present invention relates to a thrust clearance measuring device for measuring a thrust clearance (end play) formed in each mission gear when the mission gear is incorporated in a shaft such as an output shaft.

[Conventional technology]

The transmission gears such as a second gear and a third gear are rotatably assembled to the shaft on the outer periphery of the shaft such as an input shaft and an output shaft that are incorporated in a transmission of an automobile. At the time of gear shift operation, the gear shift operation is performed by remotely operating a synchronizer incorporated in the shaft together with each mission gear and rotating a desired mission gear integrally with the shaft.

FIG. 7 shows that, in the assembly process of the shaft (A), the second gear, the mission gears (B ₁ ) (B ₂ ) and the synchronizer (C) which are the third gears are incorporated in the shaft (A), It shows a state in which bearings (D) and (E) for supporting the shaft (A) in the mission case are incorporated.

By the way, in the assembly process of the shaft (A), when the above-mentioned members are assembled into the shaft (A), the respective transmission gears (B ₁ ) (B ₂ ) have a predetermined thrust gap (hereinafter referred to as end play). It is necessary to have such a structure that it is normally rotatable with respect to the shaft (A). For example, 7th
As shown in the figure, if the transmission gears (B ₁ ) (B ₂ ) to be the second gear and the third gear are assembled on the shaft (A), the transmission gears (B ₁ ) (B ₂ )
Must have end play of α ₁ and α ₂ , respectively. Therefore, in the assembly process of the shaft (A), when the assembly of the mission gears (B ₁ ) (B ₂ ) into the shaft (A) is completed, thereafter, the respective mission gears (B ₁ ) (B ₂ ) ) Is measuring the end play. The measurement of this end play has conventionally been performed as follows. That is, as shown in the schematic diagram of FIG. 6, after the shaft (A) in which the mission gear (B) for measuring the end play is incorporated is vertically supported, the concave portion formed on the outer periphery of the mission gear (B) is supported. The tip of the measuring plate (1) is engaged in the groove (B '). Then, the transmission plate (1) is raised by the cylinder (2) to lift the transmission gear (B) to the upper end. Next, this measurement plate (1) is lowered this time to push down the transmission gear (B) to the lower end. Then, the end play of the transmission gear (B) is measured by measuring the descending amount of the measurement plate (1) at this time by the measuring device (3).

[Problems to be solved by the device]

As described above, by vertically moving the measurement plate (1) engaged with the mission gear (B) by the cylinder (2), the mission gear (B) is moved up and down, and the movement of the measurement plate (1) at this time. When the end play of the mission gear (B) is measured from the amount, the measuring plate (1) itself is bent due to the pressing force applied to the mission gear (B) via the measuring plate (1), and this bending amount is also measured. Is not constant,
There is a problem that this appears as a measurement error.
Further, the pressing force applied to the transmission gear (B) via the measuring plate (1) reverses its direction downward after the transmission gear (B) is lifted to the upper end. At the same time, there is a problem in that a slight positional deviation occurs at the engagement portion between the measurement plate (1) and the transmission gear (B), which appears as a measurement error.

[Means for Solving the Problems]

A large-diameter cylinder, which is placed near the transmission gear that is inserted into the shaft that supports the thrust gap measuring device that is vertically supported by a thrust gap measuring device that measures the thrust gap of the transmission gear that is inserted into the transmission shaft, and a large-diameter cylinder. A small-diameter cylinder that is coaxially arranged and expands and contracts separately from the large-diameter cylinder, and is connected to the piston rod of the large-diameter cylinder such that its tip is positioned opposite to the upper side surface of the transmission gear. The upper measuring plate and the lower measuring plate connected to the piston rod of the small diameter cylinder so that the tip is located at the position facing the lower side surface of the transmission gear, and the small diameter cylinder is shortened, By raising the lower measurement plate,
After lifting the mission gear to the upper end, extend the large diameter cylinder to lower the upper measuring plate, and push the mission gear together with the lower measuring plate to the lower end. During the operation of the large-diameter cylinder, the lower measuring plate is constantly pressed by the small-diameter cylinder in the same direction at a constant pressure.

[Action]

As mentioned above, the lower measuring plate lifts the mission gear to the upper end, and while keeping the lower measuring plate pressed against the mission gear at a predetermined pressure, the mission gear is pushed down together with the lower measuring plate. By measuring the amount of movement of the plate, a constant pressure is always applied to the lower measuring plate during measurement, and the pressing direction is always the same direction.

〔Example〕

1 and 2 show a measuring device according to the present invention, which is integrated with a press-fitting device for press-fitting a bearing to a shaft into which a transmission gear and a synchronizer are fitted. In the figure, (10) is a base, (11) is an elevator that is vertically movable with respect to the base (10) via guide rods (12), (13), It is a first cylinder for moving the lifting platform (11) up and down. (14) is a U-shaped shaft receiver provided at the center of the front surface of the lifting platform (11),
(15) is located at a position facing the opening of the shaft receiver (14)
A clamper rotatably supported by a cylinder (16). With the clamper (16) rotated counterclockwise in FIG. 2 and the opening of the shaft receiver (14) being opened, the transmission gears (B ₁ ) (B ₂ ) and the synchronizer (C) are shown. After locating a predetermined part of the shaft (A) fitted in in the shaft receiver (14), the clamper (16) is rotated clockwise in FIG. 2 to open the opening of the shaft receiver (14). By closing, the shaft (A) is vertically supported on the front surface of the lift table (11). Reference numeral (17) is a bearing press-fitting device provided at a position facing the shaft receiver (14) on the base (10), and the upper end of the press-fitting position (17) is press-fitted onto the shaft (A). A bearing accommodating portion (17a) for accommodating the bearing (D) is provided. Then, the shaft (A) is vertically supported as described above while the first cylinder (13) is extended and the lift table (11) is raised, and the bearing accommodating portion of the bearing press-fitting device (17). Bearing (D) on (17a)
Then, the first cylinder (13) is shortened and the lift table (11) is lowered to press fit the bearing (D) into the outer periphery of the shaft (A) on the lower side in the drawing. When the press fitting of the bearing (D) to the outer periphery of the lower side of the shaft (A) is completed, the press fitting device (not shown) located above the shaft (A) causes the upper side of the shaft (A) in the figure. The bearing (E) is pressed into the outer periphery of the. (20) is for measuring the end play of the transmission gears (B ₁ ) (B ₂ ) fitted to the shaft (A) supported on the front surface of the elevator (11) as described above. 11) Thrust clearance measuring device placed above. The thrust clearance measuring device (20) includes a frame (21) having a U-shaped cross section, a large diameter cylinder (22) supported by the frame (21), and a coaxially integral body with the large diameter cylinder (22). And a small diameter cylinder (23) formed in. As shown in FIG. 2, the support frame (21) is provided with a lift table (11).
The shaft (24) (24) fixed on the top of the third cylinder (25) is slidably supported in the front-rear direction of the lift table (11) and fixed to the lift table (11). The support frame (21) is connected to the rod (25a), and the support frame (21) is slidable in the front-rear direction on the lift table (11) by expanding and contracting the third cylinder (25). The large diameter cylinder (22) includes a first housing (26) fixed on the support frame (21) and a second housing (27) fixed on the upper surface of the first housing (26).
And a large-diameter piston (29) slidably inserted in a cylinder chamber (28) formed in both housings (26) and (27), and a piston rod integrated with the large-diameter piston (29). (30) and is composed of. The large-diameter piston (29) and the piston rod (30) are provided with a through hole (31) through which a piston rod (35) of a small-diameter piston (34) described later penetrates. Also, a small diameter cylinder (23) arranged coaxially with the large diameter cylinder (22).
Is a second housing (27) described above, a third housing (32) fixed to the upper surface of the second housing (27),
A small diameter piston (3) slidably inserted in a cylinder chamber (33) formed in both housings (27) (32).
4) and the small diameter piston (34), and the large diameter piston (29) and piston rod (30).
Piston rod (35) that penetrates the through hole (31) provided in the
It is composed of and. The large-diameter cylinder (22) and the small-diameter cylinder (23) are introduced into the cylinder chambers (28) (33) through the intake and exhaust holes (22a) (22b) and (23a) (23b) provided respectively. By sending air under pressure,
The respective pistons (29) (34) and piston rods (30) (35) can be individually moved up and down on the support frame (21). (36) is the large diameter cylinder (2
The upper measuring plate connected to the lower end of the piston rod (30) of (2), (37) is the piston rod (3) of the small diameter cylinder (23).
It is a lower measurement plate connected to the lower end of 5). The tip parts (36a) (37a) of the measurement plates (36) (37) on both sides are attached to the lift table (1
1) The shaft (A), which is supported on the front surface, has a flat surface so that it can be stably contacted with the upper side surface (B ₂ ′) and the lower side surface (B ₂ ″) of the transmission gear (B ₂ ). It is formed in a U-shaped cross section, and (38) in the figure is a measuring device that measures the amount of movement when the lower measuring plate (36) descends.
(39) (39) are the lower measuring plate (36) and the upper measuring plate (3
7) A guide rod that serves as a guide when moving up and down.

In the above structure, a shaft on which the transmission gears (B ₁ ) (B ₂ ) and the synchronizer (C) are fitted and the bearings (D) and (E) are inserted on the front surface of the lift table (11). After (A) is vertically supported, the transmission gear (B
To measure the end play of ₂ ), first, the cylinder chambers (28) of the large diameter cylinder (22) and the small diameter cylinder (23).
Air is pumped into the (33) through the intake / exhaust holes (22a) (23a) to shorten the large diameter cylinder (22) and at the same time extend the small diameter cylinder (23) to raise the upper measurement plate (36). At the same time, lower the lower measurement plate (37) to lower the gap between them to the maximum. Next, the third cylinder (25) in the shortened state is extended, and the support frame (21) is lifted (11).
By sliding it toward the front surface of the vehicle, the upper measurement plate (36) and the lower measurement plate are located at positions facing the upper side surface (B ₂ ′) and the lower side surface (B ₂ ″) of the transmission gear (B ₂ ). Position the tips (36a) and (37a) of (37) (state shown in the schematic view of Fig. 3.) Next, the small diameter cylinder (23) is shortened through the intake and exhaust holes (23b), and the lower measurement plate ( 3
By raising the 7), after contacting the lower measuring plate (37) on the lower side surface of the transmission gear (B ₂₎ (B 2 _"), the lower measuring plate transmission gear (B ₂₎ by (37) Lift to the upper end (state shown in the schematic diagram of Fig. 4.) In this state, set the scale of the measuring device (38) for measuring the downward movement amount of the lower measuring plate (37) to zero and start from this state. The measuring device (38) can measure the amount of lowering of the lower measuring plate (37), and then while the upward pressure is being applied to the lower measuring plate (37) by the small diameter cylinder (23). The large diameter cylinder (2
Air is pumped into the cylinder chamber (28) of (2), the large diameter cylinder (22) is extended, and the upper measurement plate (36) is lowered to move the upper measurement plate (36) to the transmission gear (B ₂ ) Is contacted with the upper side surface (B ₂ ′). In this state, if air is continuously pumped to the large diameter cylinder (22), the pressing force of the large diameter cylinder (22) is larger than the pressing force of the small diameter cylinder (23), so the transmission gear (B ₂ ) is measured on both sides. It is pushed down to the lower end while being sandwiched between the plates (36) and (37) (state shown in the schematic view of FIG. 5). Then, the end play of the mission gear (B ₂ ) is measured by measuring the downward movement amount of the lower measurement plate (37) at this time by the measuring device (38). In this way, when the end play measurement is completed, the large diameter cylinder (22) is shortened and at the same time the small diameter cylinder (23) is extended to open the upper measuring plate (36) and the lower measuring plate (37). After that, by shortening the third cylinder (25) and retracting the support frame (21), the upper measurement plate (36) and the lower measurement plate (37) are separated from the transmission gear (B ₂ ) and the next measurement is performed. Prepare for In this way, the transmission gear (B ₂ ) is pushed down together with the lower measurement plate (37) with the lower measurement plate (37) kept in pressure contact with the transmission gear (B ₂ ) at a predetermined pressure. If you measure the amount of movement of the lower measurement plate (37),
During operation of the large diameter cylinder, the lower measuring plate (37) is always pressed with a constant force by the small diameter cylinder.
Since this pressing direction is always the same direction, accurate measurement can be performed.

In the above embodiment, an example in which only one set of the large diameter cylinder (22) and the small diameter cylinder (23) is provided on the support frame (21) has been described, but in reality, one point in FIG. 1 and FIG. As shown by the chain line, a second large diameter cylinder (22 ') and a second small diameter cylinder (23') are arranged side by side on the large diameter cylinder (22) and the small diameter cylinder (22) on the support frame (21). A second upper measuring plate (36 ') and a second lower measuring plate (37') are also attached to the second large diameter cylinder (22 ') and the second small diameter cylinder (23'). When the end play of the transmission gear (B ₂ ) is measured by the upper measuring plate (36) and the lower measuring plate (37), the second upper measuring plate (36 ′) and the second lower part are parallel to the end play. Measuring plate (3
By 7 '), the end play of the mission gear (B ₁ ) can be measured, and the end play of each mission gear (B ₁ ) (B ₂ ) on the shaft (A) can be measured at the same time. .

[Effect of device]

As described above, according to the present invention, the lower measurement plate temporarily raises the mission gear to the upper end, and while the lower measurement plate is pressed against the mission gear at a predetermined pressure, the mission gear is pushed down together with the lower measurement plate. The end play of the transmission gear is measured by measuring the amount of movement of the lower measuring plate at this time. Therefore, according to the present invention, during the measurement of the end play, the lower measuring plate is always pressed with a constant pressure, the amount of deflection of the lower measuring plate is always constant, and the pressing direction is always the same. Since it is the direction, accurate measurement is possible.

[Brief description of drawings]

FIG. 1 is a side sectional view of a thrust clearance measuring device according to the present invention, FIG. 2 is a plan view, FIGS. 3 to 5 are schematic diagrams showing an operating state of the thrust clearance measuring device, and FIG. FIG. 7 is a schematic diagram for explaining the method for measuring the thrust clearance, and FIG. 7 is a drawing showing an example of a transmission shaft. (20) …… Thrust clearance measuring device, (22) …… Large cylinder, (23) …… Small cylinder, (29) …… Large piston, (30) …… Pistor rod, (34) …… Small diameter Piston, (35) …… Piston rod, (36) …… Upper measuring plate, (37) …… Lower measuring plate, (A) …… Shaft, (B ₂ ) …… Mission gear, (B ₂ ′)… … Top side, (B ₂ ″) …… bottom side.

Claims (1)

[Scope of utility model registration request] 1. A large diameter cylinder having a thrust gap measuring device for measuring a thrust gap of a transmission gear fitted on a transmission shaft, the large diameter cylinder being disposed in the vicinity of the mission gear fitted on a shaft supported vertically. A small-diameter cylinder that is arranged coaxially with the cylinder and expands and contracts separately from the large-diameter cylinder, and is connected to the piston rod of the large-diameter cylinder with its tip facing the upper side surface of the transmission gear. And a lower measurement plate connected to the piston rod of the small diameter cylinder so that the tip is located at a position facing the lower side surface of the transmission gear, and the small diameter cylinder is shortened, By raising the lower measurement plate,
After lifting the mission gear to the upper end, extend the large diameter cylinder to lower the upper measuring plate, and push the mission gear together with the lower measuring plate to the lower end. The thrust clearance measuring device is characterized in that the lower measuring plate is constantly pressed by the small diameter cylinder in the same direction at a constant pressure during the operation of the large diameter cylinder.