JPH0451949Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial field of application This invention relates to a device for disassembling and removing a cap that rotatably supports a drive wheel axle on a differential carrier (hereinafter referred to as "differential carrier"). .

Prior Art When assembling a differential carrier to a drive wheel axle such as a rear axle, it is necessary to disassemble and temporarily remove the cap of the bearing of the drive wheel axle that is temporarily assembled to the differential carrier as a preparatory step for assembling the differential carrier.

For example, caps 2, 2 are fastened by cap bolts 3, 3 to the inside of the side wall in which the axle hole of the differential carrier 1 shown in FIG. 7 is formed. Therefore, in order to disassemble the cap 2, it is necessary to insert a tool from the opening side of the differential carrier 1, loosen the cap bolt 3, and remove it. Figure 8 shows differential carrier 1 to cap 2.
This shows a conventional device for disassembling a differential carrier cap. This differential carrier cap disassembling device 10 includes a disassembling device main body 12 equipped with a nut runner 11 having four sockets 11a for removing cap bolts 3, and a disassembling device main body 12. Reversing devices 13a and 1 are provided adjacent to the work supply side (right side in FIG. 8) and discharge side (left side in FIG. 8) of 12, respectively.
3b.

Then, the differential carrier 1 is fixed to the pallet 14 on a workbench 16 or the like by clamps 15, 15 so that it is in the same posture as when it is assembled to the drive wheel axle (see FIGS. 9 to 11). It is set in the reversing device 13a on the supply side of the decomposition device main body 12. With this reversing device 13a, the pallet 14 on which the differential carrier 1 is attached is vertically moved.
It is rotated 180 degrees into an inverted position with the opening facing upward. Next, the differential carrier 1 in the inverted position is transferred to a predetermined position of the disassembly apparatus main body 12 together with the pallet 14, and then the nut runner 11 is
Fit the respective sockets 11a into the heads of the four cap bolts 3, loosen the four cap bolts 3 at the same time, separate the caps 2, 2 from the differential carrier 1, and then remove the caps 2, 2.
Then, the cap bolt 3 is manually disassembled and taken out from inside the differential carrier 2. Further, the cap 2 and cap bolt 3 disassembled and taken out here are sent to the next process by a chute or the like.

After the disassembly of the cap 2 has been completed, the differential carrier 1 is transferred together with the pallet 14 to a predetermined position on the reversing device 13b on the discharge side of the disassembly device main body 12, and is rotated 180 degrees again by this reversing device 13b, and the opening is opened at the bottom. After returning to the assembly position where the parts are located, it is sent to the next process.

Problems to be Solved by the Invention Therefore, in the case of the conventional differential carrier cap disassembly device 1 described above, a reversing device 13a for reversing the differential carrier 1 between the work supply side and the discharge side of the disassembly device main body 12; 13b, there was a problem in that a large installation space was required. Furthermore, since the movement and setting between the two reversing devices 13a and 13b and the disassembly apparatus main body 12 and the removal of the cap 2 are performed manually, the number of work increases, and the movement of the differential carrier 1 is also complicated. This poses a safety problem because the working posture when removing the cap 2 and when taking out the cap 2 is bent forward.

Further, as a similar device equipped with a reversing mechanism and a lifting mechanism, there is a nail removal device for used frame-type filters (Japanese Patent Application Laid-Open No. 149143/1983). This device holds a frame-shaped filter and is centered on a horizontal axis.
A nail puller equipped with a reversing device capable of reversing 180°, a mechanism for grasping the head of a nail nailed to a frame filter and pulling it upward, and a frame holding the nail puller in the reversing device. A saddle supported movably in the nail row direction in a plane parallel to the nailing surface of the mold filter, and a positioning device that moves the saddle in a direction perpendicular to the nail row direction to position the nail extractor at the nail row position. It is characterized by having the following features, and allows nail removal work to be performed without directly touching the frame-shaped filter with hands.

Therefore, if the shape is rectangular parallelepiped or cube like a frame type filter, it can be held and turned over, but it is not possible to hold and turn over a workpiece shaped like a differential carrier, and it is not possible to pull out a nail. Even if it were possible, the structure is not such that you only have to loosen the bolts to remove it and then lift the cap.

This idea was created in view of the above problems.
The object of the present invention is to provide a differential carrier cap disassembly device that integrally incorporates a mechanism for reversing the posture of the differential carrier.

Means for Solving the Problems As a means for solving the above problems, this invention holds a pallet with a fixed differential carrier rotatable at a predetermined angle around a horizontal axis, and inverts this pallet before disassembling the cap. a differential carrier reversing device that turns the cap into an inverted position and then inverts it again after disassembling the cap to return it to its original position;
A holding mechanism that presses down the cap of the differential carrier in an inverted position from above, and a bolt removal mechanism that loosens and removes the bolts that fasten the cap to the differential carrier.
A cap lifting device comprising: a lifting mechanism that comes into contact with the lower surface of the arch of the cap and clamps the cap with the presser mechanism, and that rises together with the presser mechanism to lift the cap that has been released from fastening with bolts; It is characterized by having

Operation With the above configuration, the differential carrier fixed to the pallet is held in a predetermined position on the differential carrier reversing device, and then rotated 180 degrees around the horizontal axis on the spot to open the opening. The position will be reversed to the top. Next, the lifting device descends and the holding mechanism and lifting mechanism clamp the cap from above and below, and after the cap bolt is loosened and removed by the bolt release mechanism, the holding mechanism and lifting mechanism are raised together. and lift the cap to approximately the height below the worker's shoulders. and,
The worker receives the lifted cap and completes the disassembly of the differential carrier cap. When the cap disassembly is completed, the differential carrier reversing device operates again, and the differential carrier in the reversed position is moved again.
Flip 180 degrees and return to the original position.

Embodiment Hereinafter, one embodiment of this invention will be described in Figures 1 to 6.
This will be explained based on the diagram. In addition, the differential carrier is the 6th
A case where the same differential carrier 1 as shown in the figure is fixed to the pallet 14 in the state shown in FIGS. 9 to 11 will be described.

The differential carrier cap disassembling device 20 is comprised of a differential carrier reversing device 21 that clamps and inverts the pallet 14 to which the differential carrier 1 is fixed, and a cap lifting device 22 that separates and lifts the cap 2 from the differential carrier 1.

Further, the differential carrier reversing device 21 is attached via a bracket 21a to the middle height of the front surface of a support column 23 erected on the floor so as to hold the pallet 14 horizontally. The differential carrier 1 is arranged at a height that makes it easy to work when the work is done. The cap lifting device 22 extends horizontally with its proximal end supported by a pair of rails 24, 24 provided vertically on the front surface of the upper part of the support column 23, and is driven by an air cylinder 22a for vertical movement to move vertically. On the lower surface of the distal end side of the arm 22b, which is provided so as to be movable to the
It is arranged at a position directly above the differential carrier reversing device 21.

Furthermore, the differential carrier reversing device 21 includes a stopper 25 for positioning the set position of the pallet 14, a clamp mechanism 26 for rotatably clamping both side edges of the positioned pallet 14 from above and below, and a clamp mechanism 26 for rotating the clamped pallet 14. 180
The reversing mechanism 27 includes a reversing hydraulic cylinder 27a that rotates the reversing hydraulic cylinder 27a, a rack 27b driven by the reversing hydraulic cylinder 27a, and a pinion 27c that meshes with the rack 27b. It is equipped with a dispensing mechanism 28 consisting of 28b,
Before disassembling the cap 2 of the differential carrier 1, rotate the pallet 14 180 degrees around the central axis to reverse the attitude of the differential carrier 1, and after removing the cap 2, rotate the differential carrier 1 180 degrees again to change the attitude. After being reversed, the differential carrier 1 from which the cap 2 has been removed is delivered by the delivery mechanism 28 to the outside of the apparatus for the next process or the like.

On the other hand, the cap lifting device 22 has four nut runners 29, which are bolt removal mechanisms that loosen and remove the cap bolts 3 fastening the cap 2 to the differential carrier 1, and lift the cap 2 from above with the cap bolts 3 removed. Presser mechanism 30 that presses elastically
and a lifting mechanism 31 that lifts the cap 2 to a predetermined height while holding the cap 2 between the holding mechanism 30 and the holding mechanism 30.

Nut runner 29 of cap lifting device 22
are directly above each of the four cap bolts 3 that fix each of the two caps 2, 2 in two places, which are installed in the differential carrier 1 with the opening facing upward. The nut runners 29 are disposed on the lower surface of the arm 22b so that the nut runners 29
a are each urged downward by a spring 29b and are vertically disposed so as to be allowed to slide upward, and each socket portion 29a of these nut runners 29 is vertically slidable by a connecting plate 29c. In the horizontal direction, they are rested and connected to each other.

Furthermore, the socket portion 29 of each nut runner 29
An annular dog 29d for operating a proximity switch is provided at the upper end of a, and near the outside of each nut runner 29, the proximity of the dog 29d is detected to stop the operation of each nut runner 29.
A proximity switch 29e for starting the lifting operation of the cap 2 is provided on the upper surface of the connecting plate 29c via a bracket.

In addition, the presser mechanism 30 and the lifting mechanism 31
is the nut runner 29 on the lower surface of the arm 22b.
The nut runner detachment air cylinder 32 suspends the nut runner so that it can be driven up and down, and the pair of guides 33 prevents it from tilting.It is guided to move up and down in the vertical direction and is installed horizontally. They are supported and provided on the support plate 34, respectively.

The presser mechanism 30 includes four presser rods 35 that elastically press each arch portion of the two caps 2, 2 in the differential carrier 1 at two locations from above.
Each presser bar 35 has its upper part slidably inserted into the support plate 34, is urged downward by a spring 35a, and is prevented from coming off by a stopper 36 at the upper end, and is provided vertically. . The lifting mechanism 31 also includes the nut runner 2.
It has two lifting claws 37, 37 disposed on the central lower surface side of the connecting plate 34 which rests the socket part 29a of 9, and both lifting claws 3
7 and 37 are arranged in a straight line at the center of the four presser bars 35 with the hooking portions at the tips facing outward, and are suspended rotatably at approximately the center, and at the base ends of each. The support plate 3
The rod 38a is rotatably connected to the lower end of a rod 38a extending downwardly from an air cylinder 38 for expanding and contracting the claws, which is vertically provided on the central upper surface side of the rod 4. The lifting claws 37, 37 are rotated by the lowering of the rod 38a of the claw expanding/retracting air cylinder 38 to enlarge the distance between the two ends, and are also rotated by the rise of the rod 38a to increase the distance between the two ends. to shrink.

Note that 29f is a cap bolt holding pin installed in the socket portion 29a of each nut runner 29.

Next, the operation of the differential carrier cap disassembling device 20 constructed as described above will be explained.

First, the pallet 14 with the differential carrier 1 mounted in an assembly position with its opening facing downwards,
After positioning and setting the end of the pallet 14 against the stopper 25 at a predetermined position of the differential carrier reversing device 21 of the differential carrier cap disassembling device 20, the differential carrier cap disassembling device 20 is started. As the stopper 25 moves back to the right or left in FIG. 2 with the starting operation, the clamp mechanism 26 operates to rotatably clamp the pallet 14, and then the clamped pallet 14 is moved to Hydraulic cylinder 2
Driven by the pinion 27c rotating by the rack 27b which is driven forward at 7a, it is rotated 180 degrees around the horizontal axis at that position, and the differential carrier 1 attached to this pallet 14 is reversed and moved up the opening. It will be in an inverted position towards.

Next, the arm 22b of the cap lifting device 22 is lowered by the vertical movement air cylinder 22a,
The lower ends of the nut runners 29b of the bolt removing mechanism 29 provided on the lower surface of the arm 22b are fitted into the heads of the four cap bolts 3 that fasten the two caps in the differential carrier 1. Then, loosen the cap bolts 3 using each nut runner 29b. When each nut runner 29b begins to loosen the corresponding cap bolt 3,
As each cap bolt 3 is loosened, the socket portion 29a is pushed up against the elastic force of the spring 29b, and when the socket portion 29a rises until the cap bolt 3 is unscrewed, the upper end of each socket portion 29a The proximity switch 29e detects the approach of the dog 29d, confirms that the cap bolt 3 has been loosened, and turns off the operation switch of each nut runner 29 to stop it.

Further, both the lifting claws 37 of the lifting mechanism 31,
37 is a rod 38 of the air cylinder 38 for expanding and contracting the claws.
a rises once and pulls up the base ends of both lifting claws 37, 37, and the gap between both tips is reduced in advance, and this lifting mechanism 31 descends together with the nut runner 29 and lifts up both lifting claws 37, 37. is lowered to a position lower than the central portion of each arch portion of the two caps 2,2. At this time, both lifting claws 37, 3
Since the lower end of 7 and the lower ends of the four presser bars 35 are approximately the same height, both lifting claws 37 with reduced spacing,
37 to the bottom of the arches of both caps 2, 2, the lower ends of each of the four presser bars 35 come into contact with the upper surface of each arch, two at a time, and then
It is pushed up against the elastic force of the spring 35a and presses each cap 2 downward. Next, by lowering the rod 38a of the pawl expansion/contraction air cylinder 38 and increasing the distance between the tips of both lifting pawls 37, 37, the tip of each lifting pawl 37 and the two presser bars 35 are separated. Each cap 2 is elastically clamped from above and below.

When the proximity switch 29e confirms that the cap bolt 3 has been loosened, the arm 2
2b is moved upward, the nut runner 29 is raised, and the presser mechanism 30 and the lifting mechanism 31 are
The caps 2, 2 held by the holding mechanism 30 and the lifting mechanism 31 are separated from the differential carrier 1, and
It can be lifted to almost the height of the worker's shoulders.

Next, when the support plate 34 of the lifting mechanism 31 is slightly lowered by the nut runner removal cylinder 32, the socket portion 29a of each nut runner 29, which is still fitted to the head of the loosened cap bolt 3, is removed from each socket. The nut runners 29 are pushed out by the cap bolt holding pin 29f housed in the portion 29a, and as a result, the caps 2, 2 held by the holding mechanism 30 and the lifting mechanism 31 are separated from each nut runner 29.

Therefore, the worker can safely and easily remove the differential cap 2, which has been lifted to a height below the shoulder, without having to bend forward and in a proper working posture.

Also, both lifting claws 37, 37 of the lifting mechanism 31
If it is detected that the cap bolt 3 has loosened due to some abnormality when lifting the cap 2 held between it and the presser bar 35, the gap between the ends of the cap bolt 3 can be increased. Both lifting claws 37,
37 is reduced to its original state, only the nut runner 29 is raised without lifting the cap 2, and an alarm is issued or a warning light is flashed to notify the operator of the abnormality.

On the other hand, the differential carrier 1, which has been disassembled by removing the caps 2 and 2, is rotated 180 degrees again by the differential carrier reversing device 21 from the inverted position with the opening facing upward, and is then reassembled into the assembled position with the opening facing downward. After the pallet 14 has been changed to
It is delivered out of the apparatus by the delivery claw 28b driven by the No. 8 delivery hydraulic cylinder 28a.

When the disassembly of the cap 2 is completed and the discharging of the pallet 14 with the differential carrier 1 attached thereto is completed, the stopper 25 of the differential carrier reversing device 21 is advanced to a predetermined position to prepare for setting the next differential carrier 1.

Note that 2, which the worker removed from differential carrier 1,
The caps 2 are transported to the next process together with the differential carrier 1.

Effects of the invention As explained above, the differential carrier cap disassembly device of this invention holds a pallet with a fixed differential carrier rotatable at a predetermined angle around a horizontal axis, and separates the pallet into two parts: before and after the cap is disassembled.
A differential carrier reversing device that rotates the differential carrier, a presser mechanism that presses down the differential carrier cap from above in an inverted position, a bolt removal mechanism that loosens and removes the bolts that fasten the cap, and a bolt that comes into contact with the lower surface of the arch of the cap. a cap lifting device comprising a lifting mechanism that clamps the cap with the presser mechanism and lifts the cap that is lifted up together with the presser mechanism to release the cap that has been unfastened by the bolt;
A cap lifting device is disposed above the differential carrier reversing device, and one differential carrier reversing device can perform two reversing operations, one before disassembling the cap and the other after disassembling the cap, so that the device can be made more compact, and The installation space for the device can be reduced.

Furthermore, since the pallet setting position on which the differential carrier is fixed is common between the cap lifting device and the differential carrier reversing device, the time required to transfer the pallet between the two devices can be omitted, and the work cycle time can be shortened.

Furthermore, the only manual work required by the worker during the disassembly process of the differential carrier cap is to remove the cap lifted by the cap lifting device, eliminating the need for workers to bend over while transferring heavy objects such as the differential carrier. This has the effect of allowing you to work safely and easily in a comfortable working posture.

[Brief explanation of the drawing]

Figures 1 to 6 show an embodiment of this invention, with Figure 1 being a front view of the differential carrier cap disassembly device, Figure 2 being a side view of the same, and Figure 3 showing the main parts of the cap lifting device. Enlarged side view, Figure 4 is the 3rd
Fig. 5 is a view taken from the - arrow in Fig. 3, Fig. 6 is a perspective view showing the state in which the cap is held and lifted by the presser bar and the lifting claw, and Figs. 7 to 11. The figures show a conventional example: FIG. 7 is a perspective view of a differential carrier, FIG. 8 is a front view of a conventional differential carrier cap disassembly device, FIG. 9 is a perspective view showing a state in which the differential carrier is fixed to a pallet, and FIG. The figure is a side view of FIG. 9, and FIG. 11 is a bottom view of FIG. 9. 1... differential carrier, 2... cap, 3...
Cap bolt, 14... Pallet, 20... Differential carrier cap disassembly device, 21... Differential carrier reversing device, 22... Cap lifting device, 2
2b... Arm, 23... Support, 24... Rail, 25... Stopper, 26... Clamp mechanism,
27... Reversing mechanism, 27a... Hydraulic cylinder for reversing, 27b... Rack, 27c... Pinion, 2
8... Payout mechanism, 28a... Hydraulic cylinder for payout, 28b... Payout claw, 29... Nut runner which is a bolt removal mechanism, 29a... Socket portion, 29b... Spring, 29c... Connection plate, 29d... Dog, 29e... Proximity switch, 30... Presser mechanism, 31... Lifting mechanism, 3
2...Air cylinder for nut runner removal, 34...
...support plate, 35...presser bar, 37...lifting claw, 38...air cylinder for expanding and contracting the claw.

Claims (1)

[Scope of utility model registration request] A differential carrier reversing device holds a pallet with a fixed differential carrier rotatable at a predetermined angle around a horizontal axis, inverts the pallet to an inverted position before disassembling the cap, and inverts the pallet again after disassembling the cap to return it to its original position. , a presser mechanism that is arranged to be movable up and down above the differential carrier inversion device and that presses down the cap of the differential carrier in the inverted position from above; a bolt removal mechanism that loosens and removes the bolts that fasten the cap to the differential carrier; a cap lifting device comprising: a lifting mechanism that comes into contact with the lower surface of the arch to clamp the cap between the presser mechanism and rises together with the presser mechanism to lift the cap that has been released from fastening with bolts; A differential carrier cap disassembly device characterized by: