JP3082650B2 - Transmission bearing press-fitting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bearing press-fitting device used when assembling bearings such as a main shaft and a counter shaft to a transmission case in a transmission assembling process.

[0002]

2. Description of the Related Art A transmission 1 for an automobile, an example of which is shown in FIG. 16, has a transmission case 2 in which a main shaft 3, a counter shaft 4 and the like are rotatably provided, and a predetermined gear assembly 5, 6
Is installed. Main shaft 3 has bearings 7, 8
The countershaft 4 is supported by the transmission case 2 by bearings 9 and 10.

In the assembling process of the transmission 1, in order to press-fit the bearing 9 of the countershaft 4 into the bearing mounting hole 12 from the end face side of the transmission case 2, the end 4c of the shaft 4 is turned upward as shown in the figure. While holding the transmission case 2 in the upright position, supporting the lower end of the countershaft 4 with the support member 13, and hitting the cup-shaped press-fitting jig 14 on the end 4 c of the countershaft 4, tapping with a copper hammer or the like The bearing 9 can be pressed into the bearing mounting hole 12 by using a tool.

[0004]

However, the main shaft 3 has a structure in which the main shaft 3 is divided into a first portion 3a and a second portion 3b in the axial direction, and a joint portion is provided between the portions 3a and 3b. The bearing 7 is supported by the press-fitting jig 14 in a state where the lower end of the main shaft 3 is supported by the support member 13 because the intermediate member 16 is interposed and the intermediate member such as the synchro ring 17 and the drive pinion cone 18 are provided. When the bearing 3 is hit into the bearing mounting hole 15 from the end 3c side, an overload is applied to the joint portion 16 and a trouble such as the synchro ring 17 sticking to the drive pinion cone 18 is caused.

In addition, the bearing 7 can be
Is pressed in the axial direction of the main shaft 3, in addition to the weight of the shaft 3, a part of the press-fitting load acts in the direction of pushing down the shaft 3, so that the main shaft 3 is lowered fully below the transmission case 2. The bearing 7 is attached to the main shaft 3 as it is. In this case, the main shaft 3 is slightly displaced in the axial direction from the normal position, which may hinder rotation of the shaft 3 and the like.

Therefore, when the bearing 7 is assembled into the bearing mounting hole 15, it is not preferable to hammer the bearing 7 in the axial direction of the main shaft 3. For this reason, conventionally, a structure in which the vicinity of the bearing mounting hole 15 of the transmission case 2 is divided in the radial direction of the main shaft 3 or the like may be adopted, and in this case, there are restrictions on the structure of the transmission case 2. There is a problem that it is large and that the assembly process of the transmission 1 is troublesome.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to solve the above-mentioned problems and to provide a bearing press-fitting device for a transmission in which a bearing such as a main shaft can be press-fitted from an end of the shaft in an axial direction without any problem. It is in.

[0008]

According to a first aspect of the present invention, there is provided an apparatus for press-fitting a bearing of a transmission shaft into a bearing mounting hole of a transmission case. A press-fit unit that is vertically movable relative to the transmission case that is held at a predetermined position with the shaft upright, wherein the press-fit unit is a shaft gripper that can grip an upper end of the shaft. A chuck having: a chuck driving means for driving a shaft holding portion of the chuck in a radial direction of the shaft to hold the shaft; and a shaft for pulling the chuck holding the shaft together with the shaft by a predetermined stroke. Pulling means and the press-fitting unit Upper and lifting body can, a bearing pushing member is caused to face the upper end surface of the bearing and the shaft is provided on the lower portion of the lifting body, the shaft
The above stroke was lifted by the shaft pulling means.
The bearing pressing member by depressing the lifting body in a state pressed toward the bearing the
Bearing press- down means for press-fitting the bearing into the bearing mounting hole .

The transmission is conveyed to a predetermined position below the press-fit unit by a work conveying mechanism or the like. A shaft is inserted in the transmission case in advance, and a bearing is partially inserted in the shaft in advance. Then, the press-fit unit is lowered. As a result, the chuck is extrapolated from above the shaft to the upper end of the shaft. In this state, the chuck is driven by the chuck driving means in a direction in which the shaft gripping portion is closed.

After that, the shaft is slightly raised by the shaft pulling means. By doing so, the shaft, which has been fully lowered below the transmission case, is slightly pulled up, and the shaft is suspended at a predetermined axial position with respect to the transmission case. In this state, the elevating body is lowered by the bearing press-down means, so that the bearing is pressed into the bearing mounting hole by the bearing pressing member.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to a bearing press-in device 20 for a medium-sized engine shown in FIGS. The bearing press-in device 20 is used to press-fit the main shaft bearing 7 and the counter shaft bearing 9 into the bearing mounting holes 12 and 15 of the transmission case 2, respectively.

As shown in FIGS. 2 and 3, etc., the bearing press-fitting device 20 includes a base 2 mounted on a factory floor.
1, a frame 22 erected on the upper part of the base 21, an auxiliary frame 23 fixed on the front side of the frame 22,
A vertical guide rail 24 provided on the auxiliary frame 23, a press-fit unit 25 movable vertically along the guide rail 24, and an elevation drive mechanism having an actuator 30 for driving the press-fit unit 25 in the vertical direction 31 and a balance mechanism 33 having a balance weight 32 for offsetting the weight of the press-fit unit 25.

The press-fit unit 25 and the balance weight 32
The chain 34 is wound around a sprocket 35 provided at the upper end of the frame 22. The chain 34 extends the weight of the balance weight 32 in a direction in which the press-fitting unit 25 is pulled up, thereby raising and lowering the actuator. The press-fit unit 25 can be easily moved up and down even if the driving force of the unit 30 is small.

A work transfer mechanism 40 is provided below the press-fit unit 25, and the transmission 1 is carried by the transfer mechanism 40 to a position directly below the press-fit unit 25. Transmission case 2
, The main shaft 3 and the counter shaft 4 are inserted in advance. The transmission 1 is mounted on a pallet 4 with the ends 3c and 4c of the shafts 3 and 4 facing upward.
1 and placed on the positioning pin 42 (shown in FIG. 2)
Thus, the pallet 41 is held at a predetermined position.
Bearings 7 and 9 are inserted in advance into the shafts 3 and 4 halfway. In addition, a support member 43 that supports the lower end of the counter shaft 4 is provided.

The press-fit unit 25 can be reciprocated by the actuator 30 between a raised standby position shown in FIG. 2 and a lowered position shown in FIG. One example of the actuator 30 is a hydraulic cylinder, and as shown in FIG.
a is connected to the base plate 50 of the press-fit unit 25.

The press-fit unit 25 includes a base plate 50
Has a housing 51 located on the front side of the housing. FIG.
As shown in the figure, the housing 51 has a countershaft bearing press-fit mechanism 5 located on the left side when viewed from the front.
2 and a main shaft bearing press-fitting mechanism 53 located on the right side of the housing 51.

As shown in FIG. 4, the bearing press-fitting mechanism 52 for the countershaft has a cylindrical or annular bearing pressing member 55 provided on the lower surface side of the housing 51. The lower end 55a of the bearing pressing member 55 faces directly above the upper end of the countershaft bearing 9, and when the press-fit unit 25 is lowered toward the transmission 1 by the actuator 30 to the descending stroke end, the bearing pressing is performed. Member 55
The lower end 55a is configured to press down the bearing 9 and press fit into the bearing mounting hole 12. The bearing 9 is provided with a snap ring 9a such as a snap ring. When the bearing 9 is press-fitted to a predetermined depth, the snap ring 9a abuts against the transmission case 2 so that the press-fit depth of the bearing 9 is regulated. You.

The bearing pressing member 55 includes a housing 51.
Is mounted so as to be replaceable by a detachable holding mechanism 56 such as an index plunger provided in the bearing, and can be replaced with a bearing pressing member 55 according to the type (length, shape) of the counter shaft 4 and the shape of the bearing 9. Is available.

As shown in FIG. 1 and the like, the main shaft bearing press-fitting mechanism 53 includes a cylindrical elevating body 60 inserted into a housing 51. Lifting body 60
Is a vertical through hole 61 formed in the housing 51.
It is inserted in the up and down freely. On the outer peripheral side of the elevating body 60, a piston portion 62 is provided which is in close contact with the inner peripheral surface of the through hole 61, and a first oil chamber 63 located on the upper side of the piston portion 62 and a lower portion located on the lower side A second oil chamber 64 is formed. The upper frame 6 is provided on the upper end side of the housing 51.
The stopper plate 67 is fixed to the upper surface side of the upper frame 66 by a stepped bolt 68.

The first oil chamber 63 communicates with a descending oil feed port 70. The second oil chamber 64 communicates with the ascending oil supply port 71. A hydraulic unit 72 is connected to each of the oil supply ports 70, 71 so that pressurized oil can be selectively supplied to each of the oil supply ports 70, 71. When the oil is supplied to the second oil chamber 64, the elevating body 60 rises to the position shown in FIG. 1. When the oil is supplied to the first oil chamber 63, the elevating body 60
Are lowered to the bearing press-fitting position shown in FIG. Therefore, in this embodiment, a bearing pressing means is constituted by the piston portion 62 provided on the elevating body 60, the oil chambers 63 and 64, the hydraulic unit 72, and the like.

A bearing pressing member 73 is provided at the lower end of the elevating body 60. The lower end surface 73 a of the bearing pressing member 73 is shaped to face directly above the upper end surface of the main shaft bearing 7. The bearing pressing member 73 is attached to the elevating body 60 by a detachable holding mechanism (not shown), and is replaced with a member corresponding to the type (length, shape) of the main shaft 3 and the shape of the bearing 7. You can do it.

A cylindrical guide sleeve 75 is inserted inside the elevating body 60 so as to be relatively movable up and down.
The upper end of the guide sleeve 75 protrudes above the upper frame 66, and is provided with a cylinder member 77 by a nut 76.
Are connected. The upper end of the cylinder member 77 is closed by a cap member 78 in a liquid-tight manner.

The flange portion 8 is provided on the outer peripheral side of the cylinder member 77.
0 is provided integrally. The flange portion 80 is inserted between the upper frame 66 and the stopper plate 67, and the flange portion 80 moves between the upper frame 66 and the stopper plate 67 with a slight stroke S of about 0.5 mm to several mm.
To move up and down. This stroke S has a dimension sufficient to pull up the main shaft 3 from a position where the main shaft 3 is fully lowered below the transmission case 2 to a predetermined axial position.

An oil chamber 82 is formed between the upper frame 66 and the lower surface of the cylinder member 77 for pushing up the cylinder member 77 by the stroke S. An oil feed port 83 communicates with the oil chamber 82. When the oil pressurized by the hydraulic unit 72 is supplied to the oil chamber 82, the cylinder member 77 rises by the stroke S and the cylinder member 77 A guide sleeve 75 connected to 77 is raised by the stroke S.

A return spring 84 is provided between the stopper plate 67 and the flange portion 80. The repulsive load of the return spring 84 is
Acts in the direction of pushing down. In the vicinity of the cylinder member 77, a rising position confirmation sensor 85 for detecting that the cylinder member 77 has risen by the stroke S is provided.

On the inner peripheral surface side of the lower end of the guide sleeve 75, a tapered receiving surface 8 functioning as a chuck driving portion is provided.
7 are formed. The receiving surface 87 has a divergent shape whose inner diameter gradually increases toward the lower end of the guide sleeve 75, and the tapered surface 114 of the collet chuck 91 described below comes into contact with the receiving surface 87.

Inside the guide sleeve 75, an operation shaft 90 concentric with the guide sleeve 75 and a collet chuck 91 located below the operation shaft 90 are vertically movably inserted. A piston 93 is provided at an axially intermediate portion of the operation shaft 90. The piston 93 is a cylinder member 7
The cylinder 93 is partitioned into an upper oil chamber 94 and a lower oil chamber 95 by the piston 93.

An oil passage 100 is formed above the operation shaft 90. One end of the oil passage 100 communicates with the lower oil chamber 95, and the other end of the oil passage 100 communicates with the clamp oil supply port 101. The clamp oil supply port 101 is connected to the hydraulic unit 72. The upper oil chamber 94 is provided with an unclamping oil supply port 102.
Is in communication with The unclamping oil supply port 102 is also connected to the hydraulic unit 72.

In this case, the oil pressurized by the hydraulic unit 72 is supplied to the lower oil chamber 95 through the oil supply port 101 for clamping.
, The operating shaft 90 is raised by raising the piston 93. When the pressurized oil is supplied to the upper oil chamber 94, the operation shaft 90 is lowered by pushing down the piston 93. Above the cylinder member 77, a height detector 103 for detecting the raised position and the lowered position of the operation shaft 90 is provided.

At the lower side of the operating shaft 90, a joint member 1
The collet chuck 91 is connected via the reference numeral 10.
As shown in FIG. 5, the collet chuck 91 has a cylindrical body 111 whose lower end is open.
The end 3c of the main shaft 3 can be inserted into the inside of the shaft 11. A slit 112 is formed in the body 111 along the axial direction.
The diameter of the lower side can be increased and decreased to some extent in the radial direction.

On the inner peripheral side of the lower end of the body 111, a shaft holding portion 113 having a shape capable of holding the end 3c of the main shaft 3 is formed. A divergent tapered surface 114 whose outer diameter increases toward the lower end of the body 111 is formed on the outer peripheral side of the lower end of the body 111. The tapered surface 114 is in contact with the receiving surface 87 of the guide sleeve 75, and when the tapered surface 114 rises relatively to the receiving surface 87, the direction in which the diameter of the shaft gripper 113 decreases, that is, the end 3 c of the main shaft 3. Is displaced in the direction of gripping.

Therefore, in this embodiment, the hydraulic unit 7
2, a guide sleeve 75, a cylinder member 77, an operation shaft 90, a piston 93, oil chambers 94 and 95, etc., constitute a chuck driving unit. The hydraulic unit 72, the guide sleeve 75, and the cylinder member 7
7, the oil chamber 82, the operation shaft 90, the chuck 91 and the like constitute a shaft pulling means.

Next, the bearing press-fitting device 20 having the above-described structure will be described.
The operation of will be described. As shown in FIG. 2, the transmission 1 is transferred to a predetermined position below the press-fit unit 25 by the work transfer mechanism 40. A main shaft 3 and a counter shaft 4 are inserted in the transmission case 2 in advance, and bearings 7 and 9 are inserted in advance into the shafts 3 and 4 halfway.

The press-fit unit 25 is lowered by the actuator 30 of the lifting drive mechanism 31. Thereby, as shown in FIG. 4, the bearing 9 of the countershaft 4 is press-fitted into the bearing mounting hole 12 by the bearing pressing member 55 of the countershaft bearing press-fitting mechanism 52. The lower end side of the counter shaft 4 is supported by a support member 43.

With the lowering of the press-fit unit 25, the collet chuck 91 is externally inserted into the end 3c of the main shaft 3 from above. In this state, as shown in FIG. 6, pressurized oil is supplied from the oil supply port 101 for clamp to the lower oil chamber 95 via the oil passage 100, and the piston 93 is pushed up against the cylinder member 77. As a result, the operation shaft 90 moves up integrally with the collet chuck 91. At this time, the taper surface 114 of the collet chuck 91 slides and moves upward with respect to the receiving surface 87 of the guide sleeve 75, and thereby the shaft holding portion 11 of the collet chuck 91 moves.
3 is displaced in the closing direction. Thus, the main shaft 3 is strongly gripped by the shaft gripping portion 113.

After that, as shown in FIG. 7, the pressurized oil is supplied to the oil chamber 82 from the oil feed port 83 for pulling up the shaft, and the cylinder member 77 is raised by the stroke S, so that the guide sleeve 75 is raised. And the operating shaft 90 also rises by the stroke S. When the main shaft 3 slightly rises in this way, the main shaft 3 which has been fully lowered downward with respect to the transmission case 2 until then.
Is raised a little. Therefore, the main shaft 3 is held at a predetermined axial position with respect to the transmission case 2.

In this state, as shown in FIG. 8, the pressurized oil is supplied to the first oil chamber 63 through the lowering oil feed port 70, and the oil in the second oil chamber 64 is The elevating body 60 is lowered by being discharged from the port 71 to the hydraulic unit 72 side. For this reason, the bearing 7 of the main shaft 3 is moved by the bearing pressing member 73 to the bearing mounting hole 1.
5 is press-fitted.

Thereafter, the pressurized oil is supplied to the upper oil chamber 94 through the unclamping oil supply port 102, and the operation shaft 9
0, the collet chuck 91 descends, so that the tapered surface 114 of the collet chuck 91
7, the shaft gripper 113 releases the main shaft 3. Further, the pressurized oil is supplied to the second oil chamber 64 and the oil in the first oil chamber 63 is discharged to the hydraulic unit 72 side, so that the elevating body 60 is raised. Further, when the oil pressure in the oil chamber 82 for pulling up the shaft is released, the cylinder member 77 and the guide sleeve 75 are lowered by the stroke S due to the elasticity of the return spring 84 and the weight of the guide sleeve 75. Then, the actuator 30 of the elevating drive mechanism 31 is operated on the ascending side, and the press-fit unit 25 is raised, thereby returning to the initial state shown in FIGS.

According to the bearing press-in device 20 of the above embodiment, since the main shaft 3 is gripped by the collet chuck 91 and the bearing 7 is press-fitted while the main shaft 3 is slightly pulled up, the axial press-fit load is reduced. It does not join the joint 16 or the synchro ring 17 of the main shaft 3. For this reason, troubles such as damage to the joint portion 16 and sticking of the synchro ring 17 to the drive pinion cone 18 can be avoided.

Further, since the bearing 7 can be press-fitted with the main shaft 3 pulled up by a predetermined amount, the bearing 7 is kept in the position where the main shaft 3 is fully lowered below the transmission case 2.
The problem of being assembled into a computer is also avoided. Further, when the press-fitting unit 25 is lowered, the countershaft bearing 9 is press-fitted into the bearing mounting hole 12, so that the press-fitting process of the bearing 9 can be efficiently performed.

Hereinafter, a second embodiment of the present invention will be described with reference to a bearing press-in device 200 for a large engine shown in FIGS. Note that the first
The parts substantially common to the first embodiment (FIGS. 1 to 8) are denoted by the same reference numerals as the first embodiment.

As shown in FIGS. 9 and 10 and the like, the bearing press-in device 200 includes a base 21 installed on the floor of a factory, and a frame 22 erected above the base 21.
And an auxiliary frame 2 fixed to the front side of the frame 22
3, a vertical guide rail 24 provided on the auxiliary frame 23, a press-fit unit 25 movable vertically along the guide rail 24, and an actuator 30 for driving the press-fit unit 25 in the vertical direction. A lifting mechanism 31 and a balancing mechanism 33 having a balance weight 32 for offsetting the weight of the press-fit unit 25 are provided.

Press-fit unit 25 and balance weight 32
The chain 34 is wound around a sprocket 35 provided at the upper end of the frame 22. The chain 34 extends the weight of the balance weight 32 in a direction in which the press-fitting unit 25 is pulled up, thereby raising and lowering the actuator. The press-fit unit 25 can be easily moved up and down even if the driving force of the unit 30 is small.

A work transfer mechanism 40 is provided below the press-fit unit 25, and the transmission 1 is carried by the transfer mechanism 40 to a position directly below the press-fit unit 25. A main shaft 3 and a counter shaft 4 are inserted in the transmission case 2 in advance. This transmission 1 has shafts 3 and 4
Are placed on the pallet 41 with their ends 3c and 4c facing upward, and are held at predetermined positions on the pallet 41 by positioning pins 42 (shown in FIG. 9). Bearings 7 and 9 are inserted in advance into the shafts 3 and 4 halfway. A support member 43 for supporting the lower end of the counter shaft 4 is provided.

The press-in unit 25 is moved by the actuator 30 into a standby position on the ascending side shown in FIG.
Can be reciprocated between the lower position shown in FIG. An example of the actuator 30 is a hydraulic cylinder, and connects a rod portion 30 a extending downward to the base plate 50 of the press-fit unit 25 as shown in FIG.

The lower stroke end of the press-fit unit 25 (the lower end stop position) is regulated by a stopper mechanism 201 shown in FIG. Stopper mechanism 201
Has a turntable 203 for model selection rotatable around a vertical shaft 202, and a plurality of stopper members 204 having a plurality of heights corresponding to the type of transmission are provided on the turntable 203. I have. A stopper receiving portion 205 is provided at a lower end portion of the press-fitting unit 25. By rotating the turntable 203 so that a stopper member 204 having a height corresponding to the type of the transmission is located directly below the stopper receiving portion 205. The lower stroke end of the press-fit unit 25 can be selected. A check sensor 206 is provided below the turntable 203 to determine which of the plurality of stopper members 204 is located directly below the stopper receiving portion 205.

The press-fit unit 25 includes a base plate 50
Has a housing 51 located on the front side of the housing. FIG.
As shown in the figure, the housing 51 has a countershaft bearing press-fit mechanism 5 located on the left side when viewed from the front.
2 and a main shaft bearing press-fitting mechanism 53 located on the right side of the housing 51.

As shown in FIG. 11, the bearing press-fitting mechanism 52 for the countershaft includes a cylindrical or annular bearing pressing member 55 provided on the lower surface side of the housing 51.
have. The lower end 55 a of the bearing pressing member 55 faces directly above the upper end of the countershaft bearing 9. The bearing pressing member 55 is mounted so as to be exchangeable by a holding mechanism 56.
The bearing pressing member 55 can be replaced according to the type (length, shape) of the bearing 9 and the shape of the bearing 9.

The bearing pressing member 55 can be driven up and down by a second actuator 210 (shown in FIG. 11 and the like) using a hydraulic cylinder or the like.
From the state shown in FIG.
1 is operated to the extension side, the bearing pressing member 5
The lower end 55a of the bearing 5 fits the bearing 9 into the bearing mounting hole 1
2 is press-fitted. This bearing 9
Is provided with a snap ring 9a such as a snap ring,
When the bearing 9 is press-fitted to a predetermined depth, the retaining ring 9
When a contacts the transmission case 2, the press-fit depth of the bearing 9 is regulated.

As shown in FIG. 12 and the like, the main shaft bearing press-fitting mechanism 53 has a cylindrical elevating body 60 inserted inside the housing 51. Lifting body 60
Is vertically inserted into a vertical through hole 61 formed in the housing 51. On the outer peripheral side of the elevating body 60,
A piston portion 62 that is in close contact with the inner peripheral surface of the through hole 61 is provided, and a first oil chamber 63 located above the piston portion 62 and a second oil chamber 64 located below are formed. ing. An upper frame 66 is fixed to the upper end side of the housing 51, and a stopper plate 67 is fixed to the upper surface side of the upper frame 66 by a stepped bolt 68.

The first oil chamber 63 communicates with a lowering oil feed port 70. The second oil chamber 64 communicates with the ascending oil supply port 71. A hydraulic unit 72 is connected to each of the oil supply ports 70, 71 so that pressurized oil can be selectively supplied to each of the oil supply ports 70, 71. When the oil is supplied to the second oil chamber 64, the elevating body 60 rises to the position shown in FIG. 10, and when the oil is supplied to the first oil chamber 63, the elevating body 6
0 is lowered to the bearing press-fitting position shown in FIG. Therefore, in this embodiment, the elevating body 6
0, oil chambers 63 and 64,
A bearing press-down means is constituted by the hydraulic unit 72 and the like.

A bearing pressing member 73 is provided at the lower end of the elevating body 60. The lower end surface 73 a of the bearing pressing member 73 is shaped to face directly above the upper end surface of the main shaft bearing 7. The bearing pressing member 73 is moved by the detachable holding mechanism 73b.
0, and can be replaced with a main shaft 3 according to the type (length, shape) of the main shaft 3 and the shape of the bearing 7.

A cylindrical guide sleeve 75 is inserted inside the elevating body 60 so as to be relatively movable up and down.
The upper end of the guide sleeve 75 protrudes above the upper frame 66, and the cylinder member 7 is
7 are connected. The upper end of the cylinder member 77 is closed by a cap member 78 in a liquid-tight manner.

The cylinder member 77 can be moved vertically between the upper frame 66 and the stopper plate 67 with a slight stroke S of about 0.5 mm to several mm. This stroke S has a dimension sufficient to pull up the main shaft 3 from a position where the main shaft 3 is fully lowered below the transmission case 2 to a predetermined axial position.

An oil chamber 82 is formed between the upper frame 66 and the lower surface of the cylinder member 77 for pushing up the cylinder member 77 by the stroke S. An oil feed port 83 communicates with the oil chamber 82. When the oil pressurized by the hydraulic unit 72 is supplied to the oil chamber 82, the cylinder member 77 rises by the stroke S and the cylinder member 77 A guide sleeve 75 connected to 77 is raised by the stroke S.

A return spring 84 is provided between the stopper plate 67 and the flange portion 80. The repulsive load of the return spring 84 is
Acts in the direction of pushing down. In the vicinity of the cylinder member 77, a rising position confirmation sensor 85 for detecting that the cylinder member 77 has risen by the stroke S is provided.

A tapered receiving surface 87 functioning as a chuck means is provided on the inner peripheral surface of the lower end of the guide sleeve 75.
Are formed. The receiving surface 87 has a divergent shape whose inner diameter gradually increases toward the lower end of the guide sleeve 75, and the tapered surface 114 of the collet chuck 91 described below comes into contact with the receiving surface 87.

An operation shaft 90 concentric with the guide sleeve 75 and a collet chuck 91 located below the operation shaft 90 are inserted inside the guide sleeve 75 so as to be vertically movable. A piston 93 is provided at an axially intermediate portion of the operation shaft 90. The piston 93 is a cylinder member 7
The cylinder 93 is partitioned into an upper oil chamber 94 and a lower oil chamber 95 by the piston 93.

An oil passage 100 is formed above the operation shaft 90. One end of the oil passage 100 communicates with the lower oil chamber 95, and the other end of the oil passage 100 communicates with the clamp oil supply port 101. The clamp oil supply port 101 is connected to the hydraulic unit 72. The upper oil chamber 94 is provided with an unclamping oil supply port 102.
Is in communication with The unclamping oil supply port 102 is also connected to the hydraulic unit 72.

In this case, the oil pressurized by the hydraulic unit 72 is supplied to the lower oil chamber 95 through the clamp oil supply port 101.
, The operating shaft 90 is raised by raising the piston 93. When the pressurized oil is supplied to the upper oil chamber 94, the operation shaft 90 is lowered by pushing down the piston 93. Above the cylinder member 77, a height detector 103 for detecting the raised position and the lowered position of the operation shaft 90 is provided.

At the lower side of the operating shaft 90, the joint member 1
The collet chuck 91 is connected via the reference numeral 10.
The collet chuck 91 has a cylindrical body 111 having an open lower end, similarly to the embodiment shown in FIG. 5, and the end 3c of the main shaft 3 can be inserted inside the body 111. I can do it. A slit 112 is formed in the body 111 along the axial direction, so that the lower side of the body 111 can be expanded and contracted to some extent in the radial direction.

On the inner peripheral side of the lower end of the body 111, a shaft holding portion 113 having a shape capable of holding the end 3c of the main shaft 3 is formed. A divergent tapered surface 114 whose outer diameter increases toward the lower end of the body 111 is formed on the outer peripheral side of the lower end of the body 111. The tapered surface 114 is in contact with the receiving surface 87 of the guide sleeve 75, and when the tapered surface 114 rises relatively to the receiving surface 87, the direction in which the diameter of the shaft gripper 113 decreases, that is, the end 3 c of the main shaft 3 is moved. It is designed to be displaced in the gripping direction.

Therefore, in this embodiment, the hydraulic unit 7
2, a guide sleeve 75, a cylinder member 77, an operation shaft 90, a piston 93, oil chambers 94 and 95, etc., constitute a chuck driving unit. The hydraulic unit 72, the guide sleeve 75, and the cylinder member 7
7, the oil chamber 82, the operation shaft 90, the chuck 91 and the like constitute a shaft pulling means.

Next, the operation of the bearing press-fitting device 200 according to the second embodiment having the above configuration will be described. As shown in FIG. 9, the transmission 1 is transported by the work transport mechanism 40 to a predetermined position below the press-fit unit 25. A main shaft 3 and a counter shaft 4 are inserted in the transmission case 2 in advance, and bearings 7 and 9 are inserted in advance into the shafts 3 and 4 halfway.

The press-fitting unit 25 is lowered by the actuator 30 of the lifting drive mechanism 31, and stops when the press-fitting unit 25 is lowered to a position where the stopper receiving portion 205 contacts the selected stopper member 204 of the stopper mechanism 201. After that, when the rod 211 of the actuator 210 of the countershaft bearing press-fitting mechanism 52 moves to the extension side, the bearing pressing member 55 descends, and the bearing 9 of the countershaft 4 is pressed into the bearing mounting hole 12. The lower end side of the counter shaft 4 is supported by a support member 43.

With the lowering of the press-fit unit 25, the collet chuck 91 is externally inserted into the end 3c of the main shaft 3 from above. In this state, as shown in FIG. 13, the pressurized oil is supplied to the lower oil chamber 95 from the clamp oil supply port 101 through the oil passage 100, so that the piston 93 is pressed against the cylinder member 77. Can be raised. As a result, the operation shaft 90 moves up integrally with the collet chuck 91. At this time, the tapered surface 11 of the collet chuck 91
4 moves while sliding upward with respect to the receiving surface 87 of the guide sleeve 75, so that the shaft holding portion 113 of the collet chuck 91 is displaced in the closing direction. Thus, the main shaft 3 is strongly gripped by the shaft gripping portion 113.

Thereafter, as shown in FIG. 14, the pressurized oil is supplied to the oil chamber 82 from the oil feed port 83 for pulling up the shaft, and the cylinder member 77 is moved up by the stroke S, so that the guide sleeve 75 The operation shaft 90 also moves up by the stroke S. When the main shaft 3 slightly rises in this way, the main shaft 3 which has been fully lowered below the transmission case 2 is slightly pulled up. Therefore, the main shaft 3 is held at a predetermined axial position with respect to the transmission case 2.

In this state, as shown in FIG. 15, the pressurized oil is supplied to the first oil chamber 63 through the lowering oil supply port 70, and the oil in the second oil chamber 64 is By being discharged from the port 71 to the hydraulic unit 72 side, the elevating body 60
Descends. Therefore, the bearing 7 of the main shaft 3 is pressed into the bearing mounting hole 15 by the bearing pressing member 73.

After that, the pressurized oil is supplied to the upper oil chamber 94 through the unclamping oil supply port 102,
0, the collet chuck 91 descends, so that the tapered surface 114 of the collet chuck 91
7, the shaft gripper 113 releases the main shaft 3. Further, the pressurized oil is supplied to the second oil chamber 64 and the oil in the first oil chamber 63 is discharged to the hydraulic unit 72 side, so that the elevating body 60 is raised. Further, when the oil pressure in the oil chamber 82 for pulling up the shaft is released, the cylinder member 77 and the guide sleeve 75 are lowered by the stroke S due to the elasticity of the return spring 84 and the weight of the guide sleeve 75. Then, the actuator 30 of the elevating drive mechanism 31 operates on the ascending side, and the press-fitting unit 25 moves up, thereby returning to the initial state shown in FIGS.

The bearing press-in device 200 of the above embodiment
According to this, since the main shaft 3 is gripped by the collet chuck 91 and the bearing 7 is press-fitted while the main shaft 3 is slightly pulled up, the press-fitting load in the axial direction is reduced by the joint portion 16 and the synchro ring 17 Do not join. For this reason, the joint 1
It is possible to avoid troubles such as damage to the 6 and the synchro ring 17 sticking to the drive pinion cone 18.

Further, since the bearing 7 can be press-fitted while the main shaft 3 has been pulled up by a predetermined amount, the bearing 7 is moved downward while the main shaft 3 is fully lowered with respect to the transmission case 2.
The problem of being assembled into a computer is also avoided.

Further, there is provided a stopper mechanism 201 which can switch the height of the descending stop position of the press-fitting unit 25 according to the type of the transmission, and the bearing press member 55 for the counter shaft is moved from the descending stop position. Is provided with the second actuator 210 that presses down the bearing toward the bearing 9, so that the countershaft bearings 9 of a plurality of types of transmissions can be efficiently assembled by the same press-fitting device 200.

[0073]

According to the bearing press-fitting device of the present invention,
The bearing can be press-fitted from the end of the shaft without any problem, and troubles such as the synchro ring sticking to the drive pinion cone due to the axial load accompanying the press-fitting can be avoided. In addition, since the bearing can be press-fitted with the main shaft slightly pulled up by the shaft pulling means, the problem that the bearing is assembled to the main shaft while the main shaft is fully lowered below the transmission case is also avoided. The bearing can be correctly assembled at a predetermined axial position of the shaft.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a part of a bearing press-fitting device according to a first embodiment of the present invention.

FIG. 2 is a front view showing the entire apparatus shown in FIG. 1;

FIG. 3 is a side view showing the entire apparatus shown in FIG. 1;

FIG. 4 is a longitudinal sectional view of a part of a countershaft bearing press-fitting mechanism and a main shaft bearing press-fitting mechanism of the apparatus shown in FIG. 1;

FIG. 5 is a longitudinal sectional view of a collet chuck used in the apparatus shown in FIG.

FIG. 6 is a longitudinal sectional view when the collet chuck of the apparatus shown in FIG. 1 is in a clamped state.

FIG. 7 is a sectional view of the device shown in FIG. 1 in a state where the operation shaft is slightly pulled up;

FIG. 8 is a sectional view of the device shown in FIG.

FIG. 9 is a front view of a bearing press-in device according to a second embodiment of the present invention.

FIG. 10 is a side view of the device shown in FIG. 9;

11 is a front view showing a state in which the press-fitting unit of the apparatus shown in FIG. 9 is lowered in a partial cross section.

FIG. 12 is a sectional view showing a state where the press-fit unit of the apparatus shown in FIG. 9 is lowered.

FIG. 13 is a longitudinal sectional view when the collet chuck of the device shown in FIG. 9 is in a clamped state.

FIG. 14 is a sectional view of the device shown in FIG. 9 in a state where the operation shaft is slightly pulled up;

FIG. 15 is a cross-sectional view of the device shown in FIG. 9 in a state where the elevating body is lowered.

FIG. 16 is a sectional view showing an example of a transmission.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Transmission 2 ... Transmission case 3 ... Main shaft 4 ... Counter shaft 7 ... Bearing 20 ... Bearing press-in device 25 ... Press-in unit 31 ... Elevating drive mechanism 40 ... Work transfer mechanism 51 ... Housing 52 ... Counter shaft bearing press-in mechanism 53 ... Main shaft bearing press-in mechanism 60 ... Elevating body 63 ... First oil chamber 64 ... Second oil chamber 72 ... Hydraulic unit 73 ... Bearing pressing member 75 ... Guide sleeve 77 ... Cylinder member 87 ... Receiving surface (chuck drive unit) 90 ... Operating shaft 91 ... Chuck 93 ... Piston 94 ... Upper oil chamber (oil chamber for unclamping) 95 ... Lower oil chamber (oil chamber for clamping)

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-5-104346 (JP, A) JP-A-5-85565 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B23P 21/00 306 B23P 19/02

Claims (4)

(57) [Claims] 1. A device for press-fitting a bearing of a transmission shaft into a bearing mounting hole of a transmission case, wherein the shaft is vertically moved relative to the transmission case held at a predetermined position in an upright posture. A chuck having a shaft gripper capable of gripping an upper end of the shaft; and a shaft gripper of the chuck being driven in a radial direction of the shaft to grip the shaft. A chuck driving unit for causing the chuck holding the shaft to be pulled together with the shaft by a predetermined stroke, a shaft pulling unit, an elevating body that is mounted on the press-fitting unit and that can move in a vertical direction, The lower end and the upper end of the bearing of the shaft A bearing pressing member opposed to the surface and the shaft are pulled up by the shaft pulling means.
The bearing pressing member is pressed toward the bearing by pressing down the elevating body in a state where the lift is lifted by the stroke, and the bearing is inserted into the bearing mounting hole.
Bearing indentation device of the transmission, characterized in that anda bearing pressing means for press-fitting. 2. A device for press-fitting a bearing of a transmission shaft into a bearing mounting hole of a transmission case, wherein the shaft is vertically moved relative to the transmission case held at a predetermined position in an upright posture. A press-fit unit, the press-fit unit comprising: a housing; a cylindrical elevating body provided in the housing so as to be vertically movable; a piston portion and an oil chamber for driving the elevating body in a vertical direction by hydraulic pressure. And a hydraulic unit connected to the oil chamber; and a lower end portion which is disposed concentrically with the elevating body inside the elevating body and is relatively movable vertically with respect to the elevating body and has a lower end. A guide sleeve having a chuck driving part on the inner peripheral side; and a guide sleeve concentric with the guide sleeve inside the guide sleeve. And a shaft gripper having a shape capable of gripping the upper end of the shaft on the inner peripheral side of the lower end, and the outer peripheral side of the lower end is in contact with the chuck driving portion of the guide sleeve, and A collet chuck that moves in a direction in which the shaft gripper grips the upper end of the shaft when moved in the ascending direction; an operating shaft connected to an upper end of the collet chuck; Chuck driving means having an oil chamber for clamping and an oil chamber for unclamping for driving the shaft in the vertical direction by hydraulic pressure, each of the oil chambers being connected to the hydraulic unit, and the guide sleeve with respect to the housing and anda shaft pulling means for raising by a predetermined stroke together the operating shaft and said chuck, said sheet The shift to the shaft pulling means
Press down with the stroke
Means to push down the elevating body to move the bearing
A bearing press-fitting device for a transmission, which is press-fitted into a bearing mounting hole . 3. A device for press-fitting a bearing of a main shaft of a transmission and a bearing of a countershaft into a bearing mounting hole of a transmission case, wherein the transmission case is held at a predetermined position in an upright posture. A press-fit unit that is relatively movable in the vertical direction with respect to the housing. The press-fit unit is provided on the housing, a countershaft bearing press-fit mechanism provided on the housing for press-fitting the bearing of the countershaft, And a main shaft bearing press-fitting mechanism for press-fitting the bearing of the main shaft. The countershaft bearing press-fitting mechanism includes a countershaft when the press-fitting unit is lowered to a predetermined position. A bearing pressing member for lowering the bearing of the shaft to a position for press-fitting the shaft into the bearing mounting hole; the main shaft bearing press-fitting mechanism; a cylindrical elevating body provided in the housing so as to be vertically movable; Pressing means having a piston portion and an oil chamber for driving the elevating body in the vertical direction by hydraulic pressure, a hydraulic unit connected to the oil chamber, and an elevating body disposed concentrically with the elevating body inside the elevating body A guide sleeve which is movable relative to the body in the vertical direction and has a chuck driving portion on the inner peripheral side of the lower end; and a guide sleeve disposed concentrically with the guide sleeve inside the guide sleeve and on the inner peripheral side of the lower end. It has a shaft gripper having a shape capable of gripping the upper end of the shaft, and the outer peripheral side of the lower end is in contact with the chuck drive of the guide sleeve. A collet chuck that moves in a direction in which the shaft gripper grips the upper end of the shaft when the shaft gripper moves in an ascending direction with respect to the guide sleeve; an operating shaft connected to an upper end side of the collet chuck; A chuck driving unit having an oil chamber for clamping and an oil chamber for unclamping for vertically driving the operation shaft with respect to the sleeve by hydraulic pressure, and each of the oil chambers is connected to the hydraulic unit; the guide sleeve and the operating shaft and the chuck comprises a shaft pulling means for raising by a predetermined stroke together, and the shaft pulling hand the main shaft for
In the state where the stroke is raised by the step,
The lifting body is pushed down by pushing means, and the bearing
The bearing press-fitting device for a transmission, wherein the bearing is press- fitted into the bearing mounting hole . 4. A device for press-fitting a bearing of a main shaft of a transmission and a bearing of a countershaft into a bearing mounting hole of a transmission case, wherein the transmission case is held at a predetermined position in an upright posture. A press-fit unit that can move relative to the up-down direction, and a stopper member having a plurality of types of heights that can restrict the descending stop position of the press-fit unit to a height corresponding to the model of the transmission. A stopper mechanism for causing the stopper portion having a height according to the model to face a stopper receiving portion on the press-fitting unit side, wherein the press-fitting unit press-fits a housing and a bearing of the counter shaft provided on the housing. Counter shaft for A main shaft bearing press-fitting mechanism provided in the housing for press-fitting the bearing of the main shaft, wherein the countershaft bearing press-fitting mechanism is opposed to an upper end surface of the countershaft bearing. A bearing pressing member to be pressed, and a second actuator that presses the bearing pressing member toward the bearing to press down the bearing to a position where the bearing is pressed into the bearing mounting hole. Is connected to the oil chamber, a cylindrical elevating body provided in the housing so as to be movable in the up-down direction, a piston unit for driving the elevating body in the up-down direction by hydraulic pressure, and an oil chamber. Hydraulic unit and the inside of the lifting body A guide sleeve arranged concentrically with the elevating body and movable vertically in relation to the elevating body and having a chuck driving part on the inner peripheral side of the lower end; And a shaft gripper having a shape capable of gripping the upper end of the shaft on the inner peripheral side of the lower end, and the outer peripheral side of the lower end is in contact with the chuck driving portion of the guide sleeve, and A collet chuck that moves in a direction in which the shaft gripper grips the upper end of the shaft when moved in the ascending direction; an operating shaft connected to an upper end of the collet chuck; There is a clamping oil chamber and an unclamping oil chamber for driving the shaft up and down by hydraulic pressure. A chuck driving means which is continued, provided with a shaft pulling means for raising by a predetermined stroke together the guide sleeve and the operating shaft and the chuck with respect to the housing, the shaft pulling hand the main shaft
In the state where the stroke is raised by the step,
The lifting body is pushed down by pushing means, and the bearing
The bearing press-fitting device for a transmission, wherein the bearing is press- fitted into the bearing mounting hole .