JP2001300864A - Bush extracting/fitting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bush extracting/fitting device enabling anybody to extract and fit a bush of a bearing body even in a factory or a business institution not normally having a large-sized presser. SOLUTION: This bush extracting/fitting device is constituted of a base table to be loaded with a bearing body of a torque rod for extracting and fitting a bush, and having a recessed part on the upper surface; a strut erected on the base table; a pressure-contact member of a pressurizing head of a jack mounted on the strut; a suspending member for the pressurizing head provided on the pressure-contact member; and a positioning member for making the central axis of the bearing body coincide with the central axis of the suspended pressurizing head, and provided on the upper surface of the base table, the suspending member and/or the pressure-contact member.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for removing and fitting a bush to be fitted to a bearing, and more particularly, to a bearing provided on a rod-like member such as a torque rod used in a large-sized automobile. The present invention relates to a bush extraction / fitting device used to replace a bush that has been set.

[0002]

2. Description of the Related Art In recent years, large vehicles that transport heavy objects such as dump trucks and trucks often have four or more rear wheels in order to reduce the weight per wheel. Many rear wheels are equipped with a shock absorbing mechanism called a trunnion suspension. The trunnion suspension includes a leaf spring provided on the axle for absorbing vertical movement, and a torque rod for absorbing a twist between the axles for stabilizing traveling performance against road irregularities. The torque rod includes a bearing body integrally formed at both ends of the rod, and a bush fitted to the bearing body. The bush includes a shaft having a mounting hole for an axle, and an inner peripheral surface of the bearing body. And a rubber filled between the shaft and the inner peripheral surface of the ring member. This rubber has a function of absorbing the twist between the axles. However, rubber causes its elasticity to decrease and wear over a long period of use, making the running of the vehicle unstable. Therefore, when a driving abnormality is recognized, and
At the time of regular inspections performed every two months, to realize safe running of the car, replace the bush (after removing the torque rod from the car integrally with the bush, remove the old bush from the bearing body of the torque rod, and replace the new bush. Is fitted to the bearing body of the torque rod). In recent years, the shaft has been removed from the bearing using a press machine,
Devices for changing the shaft have been proposed.

As a conventional device for removing a shaft mounted object, Japanese Utility Model Laid-Open Publication No. 50-83700 (hereinafter referred to as "A") discloses a "device for removing a shaft mounted object". The apparatus for removing a shaft mounted object disclosed in Japanese Patent Application Publication No. H11-27138 includes a chuck provided at a working end of a piston punch and a chuck for gripping an outer surface of the shaft mounted object such that the shaft and the piston punch have a coaxial core shape. And a removal jig that comes into contact with a shaft attached to the tip of the piston punch. The operation of the device for removing a shaft mounted object disclosed in Japanese Patent Application Laid-Open Publication No. Hei. After the pawl mounted on the chuck grips the outer surface of the shaft mounted object, the piston punch coaxial with the shaft is moved in the direction of the shaft mounted object. After the removal jig attached to the tip of the piston punch is brought into contact with the shaft, and the piston punch is further moved, the removal jig pushes the shaft out of the shaft mounted object and removes the shaft.

Another bearing replacement device is disclosed in Japanese Examined Utility Model Publication No. 58-45019 (hereinafter referred to as “B” publication).
Discloses a "bearing exchange device". The bearing exchange device disclosed in Japanese Patent Application Laid-Open Publication No. H11-15064 discloses a base, a connected body connected to the base via a support, a piston punch screwed into the connected body and guided up and down by the support, and withdraws the bearing from the shaft. A receiving portion provided on the base to receive the bearing, a press-fitting jig for receiving the bearing mounted on the shaft, a press-fitting jig receiver provided on the base for receiving the press-fitting jig, and a shaft at one end. And a conical recess provided on the lower end surface of the piston punch so that the rod jig is engaged with the rod jig. The operation of the bearing replacement device disclosed in the above-cited Japanese Patent Application Laid-Open Publication No. H8-207 will be described below.
When removing the bearing, after receiving the bearing at the receiving portion of the base, the piston punch is moved in the direction of the base via a rod jig, and the shaft is pushed out of the bearing by the rod jig to remove the bearing. When mounting the bearing, after receiving the bearing with a press-fitting jig, the shaft end is pushed in with a piston punch in the same manner as described above, and the bearing is mounted on the shaft.

Further, as another bush removal / fitting device, Japanese Patent Application Laid-Open No. Hei 5-337841 (hereinafter referred to as “C”) discloses “a method for removing / fitting a bush and a bush removing / wearing device”. ing. The bush extraction / fitting device disclosed in Japanese Patent Application Publication No. H10-27139 is provided with a booster jack, a box-shaped underframe having an opening in the front and rear surfaces and an opening in the ceiling, and an opening around the undersurface of the underframe ceiling. The bearing body positioning member that engages with the annular bearing body that is aligned with the opening hole, and the booster jack body provided on the bottom of the underframe engages with the booster jack pressure head to open the pressure head. And a booster jack positioning member positioned just below the hole. The operation of the thus configured bush extraction / fitting device disclosed in the above publication will be described below. When removing the bush from the bearing body, the booster jack in which the bearing body with the bush fitted is engaged with the bearing body positioning member provided around the opening hole on the lower surface of the underframe ceiling, and then the extraction jig is fixed. Is raised, the bush is pushed out from the opening in the ceiling. Further, when fitting the bush to the bearing body, after engaging the bearing body with a bearing body positioning member provided around the opening hole on the lower surface of the underframe ceiling,
When the pressure head of the booster jack to which the fitting jig temporarily fixed to the bush is fixed is raised, the bush is fitted to the bearing.

[0006]

However, the above-mentioned conventional device for removing a shaft-mounted object, a device for exchanging bearings, and a device for removing and fitting a bush have the following problems. (1) Since the press disclosed in Nos. A and B does not include a moving device, the press is not provided when the bush of the torque rod having the bearing body is to be removed and fitted. There is a problem that the heavy torque rod has to be transported to a place where a press is arranged, such as a factory. (2) When removing and fitting the bush,
A means for fixing the bearing body near the working end of the pressurizing head of the press and at the same time stably supporting the torque rod is required.If the support of the torque rod is unstable, the ring member of the bush will deform when fitted. Or the ring member of the bush is entangled in the inner peripheral surface of the bearing body at the time of removal, so that there is a problem that smooth removal and fitting cannot be performed. (3) In the bush extraction / fitting device disclosed in Japanese Patent Application Publication No. JP-A-2003-115, the use of a transportable booster jack having wheels as a press machine enables the bush to be replaced even in a place other than a factory where the press machine is provided. It is a removable fitting device that can
Since the main body of the device is not provided with a transport means, after all,
There was a problem that the torque rod for extracting and fitting the bush had to be carried to the place where the device was arranged. (4) The bushing jig and the bush newly fitted to the bearing body are fixed to the tip of the pressure head of the booster jack, approach the bearing body as the pressure head rises, and are then fitted into the bearing body. Therefore, it is necessary to make the center axis of the bearing body coincide with the center axis of the extraction jig and the bush, but this is difficult, and the ring member of the bush is deformed at the time of fitting, and the ring of the bush is removed at the time of extraction. There has been a problem that the member may bite into the inner peripheral surface of the bearing body, preventing smooth removal and fitting. (5) When it is difficult to adjust the pressure head speed when the ring member of the bush comes into contact with the bearing body and is fitted or when the extraction jig contacts the ring member of the bush, and when the speed is too high, the ring member is used. There is a problem that a contact portion with the bearing body or a contact portion with the ring member of the extracting jig may be deformed.

[0007] The device for removing and fitting a bush according to the present invention solves the above-mentioned conventional problems, and removes and fits a bush of a bearing body even in a factory or office where a large press machine is not always provided. It is an object of the present invention to provide a bush removal / fitting device that can be easily transported by anyone.

[0008]

SUMMARY OF THE INVENTION In order to solve the above-mentioned conventional problems, the present invention provides a bush extraction / fitting device in which a bearing for a torque rod on which a bush is extracted and fitted is mounted. A base provided on the top surface, a support standing upright on the support, a pressure contact member of a pressure head of a jack erected on the support, a suspension member of the pressure head provided on the pressure contact member, and a bearing. It has a configuration including an upper surface of a base for aligning a center axis of a body with a center axis of a suspended pressure head, and a positioning member provided on a suspension member and / or a press-contact member. . With this configuration, it is possible to provide a transportable bushing removing and fitting device that allows anyone to easily remove and fit the bushing of a bearing body even in a factory or a business place where a large press machine is not always provided. Can be.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A bush extraction / fitting device according to claim 1 is provided with a base having a recess on the upper surface on which a bearing of a torque torque rod on which the bush is extracted and fitted is mounted. And a supporting member erected on the base, a pressing member of the pressing head of the jack erected on the supporting member, a suspending member of the pressing head provided on the pressing member, a center shaft of the bearing body, and a suspension. And a positioning member provided on the suspension member and / or the press-contact member for matching the center axis of the pressurized head. With this configuration, the following operation is provided. (1) Since a jack provided on a large-sized vehicle such as a dump truck having a torque rod is used as a press machine, and the jack is configured to be detachable, a factory or a business office where a large-sized press machine is not always provided. The bush can be pulled out or fitted in the above manner. (2) Since the positioning member is provided for positioning using the outer peripheral surface of the bearing body for extracting and fitting the bush and the outer edge of the pressure head of the jack, the center axis of the jack, the bearing body and the bush can be easily provided. Can be matched, and smooth removal and fitting can be performed without deforming the ring member of the bush at the time of fitting, and without engaging the ring member of the bush at the inner peripheral surface of the bearing body at the time of removal. (3) Since the jack is suspended by the pressure head and is not fixed, the jack has a degree of freedom between the suspension member and the pressure head, and presses the end face of the bush for removal and fitting. Even when the end face of the member to be made is not parallel to the lower end face of the jack, the displacement can be absorbed by the suspension of the pressure head, so that there is no hindrance to the removal and fitting of the bush.

Here, the base mounts the bearing of the torque rod positioned by the positioning member, and the recess is provided for dropping the bush extracted from the bearing. Is positioned outside the inner line of the opening of the bearing body when positioned on the base, and is positioned inside the outer line of the bearing body. Further, the depth of the recess is set to be larger than the length of the shaft of the bush. This is for dropping the bush extracted from the bearing body. The concave portion may be a plate-shaped member fixed to the upper surface of a member serving as a side wall of the base and provided with an opening, or a block-shaped base having a perforated upper surface. Further, as the positioning member provided on the upper surface of the base, a projection to which the outer peripheral surface of the bearing is brought into contact, a concave portion into which the outer peripheral surface of the bearing is fitted, and the like are used. Further, another positioning member is attached by a method such as being fitted to a positioning member provided in advance on the base, or a positioning member adapted to the size of the bearing body is attached to the base by a fixing method such as a screw, A detachably provided positioning member is also used as needed. This is to improve the versatility and convenience of the device by enabling positioning of a bearing having a small outer diameter. Further, as the jack, a hydraulic jack normally provided in a large vehicle such as a dump truck having a torque rod is preferably used. If the torque rod can be stably supported and the center axis of the bush can be aligned with the center axis of the bearing body using the device having the configuration of the present invention, the bush will not bite into the bearing body and will not come off or be inserted obliquely. This is because it has been found that a hydraulic jack having a maximum load of 20 tons can exhibit a sufficient function since the hydraulic jack is not used. further,
As a material of the base upper surface, in order to prevent deformation due to pressure, a material having a higher hardness than a ring member of a bearing body or a bush is used, and hardened or hardened steel, super steel, or the like is preferably used. Used. Further, a composite material in which only the portion in contact with the bearing body is made of these materials is used.

According to a second aspect of the present invention, there is provided the device for removing and fitting a bush according to the first aspect, wherein a torque rod is provided on a member horizontally provided on the base so as to bridge the torque rod horizontally with the base. It has a configuration in which a support member is slidably provided. With this configuration, in addition to the function of claim 1, the distance between the base and the torque rod support member can be set arbitrarily, and the torque rod can be held horizontally with the base regardless of the unevenness of the floor surface. However, there is an effect that the bush of the torque rod having various lengths can be easily removed and fitted by itself.

[0012] The invention according to claim 3 is the invention according to claim 1 or 2.
Wherein the at least one end has an inner edge fitted on the shaft of the bush and an outer edge fitted on the bearing body, and / or fitted on the shaft of the bush. It has a configuration provided with a fitting jig having at least one end with an inner edge and an edge having an end face abutting on the end face of the bearing body. With this configuration, the following operation is obtained in addition to the operation of the first or second aspect. (1) Since the bush is pressurized by the jack via the extraction jig or the fitting jig directly fitted on the shaft of the bush,
The center axes of the jack, the bearing body, the jig and the bush can be easily matched, so that the bush can be smoothly removed and fitted. (2) Since the bush is pressurized by the jack via a removing jig or a fitting jig which is previously fitted on and abutted on the shaft of the bush, it is easy to adjust the pressing speed of the jack, and the bush can be smoothly adjusted. Can be pulled out and fitted.

Here, as the material of the extraction jig and the fitting jig, a material having a higher hardness than the ring member of the bearing body or the bush is used to prevent deformation due to pressurization. Hardened steel, super steel and the like are preferably used. Further, a composite material in which only a portion of the bearing member or the bush that contacts the ring member is made of these materials is used.

The invention described in claim 4 is the first to third aspects of the present invention.
The caster is fixed to the base, and the lower end of the outer periphery of the wheel of the caster is fixed to a position higher than the lower end of the base. Have. With this configuration, in addition to the function of any one of claims 1 to 3, the transport of the device is easy, so that the bush can be removed or fitted immediately beside the vehicle where the torque rod such as a dump truck must be replaced. Can be carried out and can be placed in a place where it is not obstructed when not in use.

Here, as the casters, those having rubber arranged on the outer peripheral surface thereof to absorb the impact from the floor surface during transportation are preferably used. When a member provided with a torque rod supporting member is provided horizontally on the base, the casters are desirably provided at diagonal positions of the torque rod supporting member of the base. This is because if the device is tilted in the direction of the diagonal position of the torque rod support member, the wheels are easily grounded, and transport using casters is facilitated.

The invention described in claim 5 provides the invention according to claims 1 to 4
The bush removal and fitting device according to any one of the above, wherein a contact member that contacts a lower end of the suspended jack,
It has a configuration provided with an elastic body stretched over the attaching member and the pressing member. According to this configuration, in addition to the operation of any one of claims 1 to 4, the cylinder pushed out of the jack can be removed from the hydraulic mechanism of the jack without applying an external force for removing the jack and storing the cylinder in the jack. By simply opening the oil valve, the cylinder can be stored in the jack again by the biased elastic body.

Here, the elastic body is not limited to a kind as long as the contact member and the pressure contact member are stretched, and is a material having elasticity as a characteristic of the material itself, such as rubber, for example, a spring. A member formed or processed to have a material having no elasticity such as elasticity, such as a mechanically elastic structure such as a cylinder containing air or oil can be used, but weather resistance, A crane spring having excellent elasticity, strength and cost is preferably used. The elastic body is displaced with pressurization of the jack and has an elastic constant that returns to its original state when the pressurization mechanism of the jack is opened.

[0018] The invention according to claim 6 is the invention according to claims 1 to 5
The device for removing and fitting a bush according to any one of the above, wherein a storage portion for storing a removing jig, a fitting jig, and the like is fixed to an upper portion of the press-contact member. With this configuration, in addition to the function of any one of claims 1 to 5, it is possible to store the extraction jig and the fitting jig which are likely to be lost, to convey it together with the apparatus, and to apply pressure by the pressure head. This has the effect of reinforcing the pressure contact member and preventing its deformation.

The invention according to claim 7 is the invention according to claims 1 to 6
The bush extraction / fitting device according to any one of the above, wherein the axial thickness of the extraction jig is equal to the axial thickness of the fitting jig and the inner peripheral surface of the bearing body. The thickness is substantially the same as that obtained by adding the thickness in the axial direction. With this configuration, in addition to the function of any one of claims 1 to 6, the distance between the base and the press-contact member can be shortened, the device can be downsized, and the cylinder can be pushed out for extraction or fitting. This has the effect of shortening the required time.
When the bush is fitted to the bearing body, the bearing body, the bush and the fitting jig are overlapped, and when the bush is removed from the bearing body, the bearing body and the removing jig are overlapped.
Assuming that the axial length of the fitting jig is the same as the axial length of the extracting jig, the distance between the base and the press-contact member required when fitting the bush is smaller than that required when removing the bush. It is because it becomes large.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. (Embodiment 1) FIG. 1 is a perspective view of a bush extraction / fitting device (jack is not shown) in Embodiment 1 and FIG. 2 is a bush extraction / fitting device in Embodiment 1 of the present invention. FIG. 3 is a side view showing a state in which a torque rod with a bush fitted thereon is disposed on the bush, and FIG. 3 is a main part along line AA of FIG. 2 showing a state when the bush is removed from the torque rod with the bush fitted thereon FIG. 4 is a sectional end view, and FIG. 4 is a diagram showing a state when a bush is fitted to a torque rod.
FIG. 4 is a cross-sectional end view of a main part along line AA of FIG. In the drawing, reference numeral 1 denotes a bush extraction / fitting device according to the first embodiment, reference numeral 2 denotes a base on which a plate-shaped member 2b is fixed on two U-shaped frames 2a, and reference numeral 3 denotes a plate-shaped upper surface of the base 2. The recesses 4 of the base 2 provided on the member 2b project from the upper surface of the plate-like member 2b, and the outer peripheral surface of the bearing 30a of the torque rod 30 abuts thereon.
This is a positioning member for matching the center axis of the pressure head 0a with the center axis of the pressure head 13a of the jack 13. The positioning member 4 may be fixed to the plate member 2b by welding or the like, or may be detachably fixed to the plate member 2b with screws or the like. In this case, it is excellent in versatility and convenience that the position of the positioning member 4 can be adjusted according to the size of the bearing body of the torque rod. Reference numeral 5 denotes four pillars erected on the base 2, 6 is erected on the pillar 5, and when the lower end face 13 c of the jack 13 is pressed against the extraction jig 11 or the fitting jig 12, the jack 1
3 is a pressing member to which the pressing head 13a is pressed, and 7 is the pressing head 1 of the jack 13 provided on the lower surface of the pressing member 6.
A member 8 for inserting and suspending 3a is fixed to the suspending member 7 and / or the pressing member 6 and is a pressure head 13a of the jack 13.
Of the pressurizing head 13a defined by the suspending member 7 and the contact member 8 is a bearing member 30a defined by the positioning member 4. Are arranged so as to be the same as the central axis. Numeral 9 is a torque rod supporting member bridged between the two frames 2a and slidably locked to the frame 2a by a sliding locking portion 9a, and a bearing 30a of the torque rod 30 is a positioning member for the base 2. 4, the torque rod 30 can be horizontally supported between the base 2 and the torque rod support member 9. 10 is a torque rod supporting member 9
Is an end holding member that prevents the frame 2a from coming off from the end of the frame 2a and that holds the end of the frame 2a that forms the base 2 and slides the torque rod support member 9. Reference numeral 11 denotes a removal jig having an inner edge that fits the shaft 31a of the bush 31 and an outer edge that fits in the bearing body 30a.
Is an inner edge of the bush 31 on which the shaft 31a is fitted and the bearing body 30
a jig having an edge portion 12a having an end surface which is not fitted into the inside of the bearing member 30a but abuts against the end surface of the bearing body 30a. 13
Is the shaft 1 with the oil valve in the hydraulic mechanism closed.
When the cylinder 3b is moved up and down, oil is pressure-fed into the hydraulic mechanism and the cylinder 13b is pushed out, and is a hydraulic jack normally provided in large vehicles such as dump trucks having a torque rod. 31 is a bush, 31a is a shaft of the bush, 31b is a ring member fitted to the bearing 30a of the torque rod 30, and 31c is rubber filled between the shaft 31a and the ring member 31b.

First, a description will be given of a method of using the bush removing / fitting device according to the first embodiment configured as described above when removing the bush 31 fitted to the bearing body 30a. First, the bearing 30a at one end of the torque torque rod 30 fitted with the bush 31 is placed on the upper surface of the base 2, and the outer peripheral surface of the bearing 30a is brought into contact with the positioning member 4, and the length of the torque rod 30 is adjusted. The torque rod 3 is placed on the torque rod support member 9 slid according to
0, the torque rod 30 is horizontally extended between the base 2 and the torque rod support member 9, and then the extraction jig 11 is connected to the shaft 31 of the bush 31 fitted to the bearing body 30a.
a. The sampling jig 11 is a shaft 31 of a bush 31.
a and an outer edge that fits into the bearing body 30a, so that when the extraction jig 11 is fitted to the shaft 31a of the bush 31, the center axis of the bush 31 and the central axis of the extraction jig 11 are aligned. Coaxially located.

Next, the pressure head 13a of the jack 13 is suspended from the suspension member 7. Next, when the shaft 13c of the jack 13 is moved up and down with the oil valve in the hydraulic mechanism closed, and the cylinder 13b of the jack 13 is pushed out, the lower end face 13d of the jack 13 contacts the upper end face of the extraction jig 11. Touched. When the shaft 13c is further moved up and down, the pressing head 13a is pressed against the pressing member 6, and the lower end 13d of the jack 13 presses the upper end surface of the extracting jig 11. As the cylinder 13b is pushed out of the jack 13, the extraction jig 11 is fitted into the bearing 30a, and the bush 31 is pushed out by the extraction jig 11 and extracted from the bearing 30a. Bush 31 removed
Falls into the recess 3 of the base 2. After removing the bush 31 that has fallen into the recess 3, the pressure head 13 a of the jack 13 is slid from the suspension member 7 to remove the jack 1.
3, the oil valve in the hydraulic mechanism is opened, and a pressure is applied to the pressure head 13 a in the direction of the cylinder 13 b by, for example, stepping on the pressure head 13 a with a foot. After storing in
The pressurizing head 13a is inserted into the suspension member 7 again, and the jack 13 is suspended from the bush extraction / fitting device 1.

Next, one end of the torque rod 30 from which the bush 31 has been removed is placed on the torque rod support member 9, and the torque rod 3 on which the bush 31 is still fitted is placed.
The other end of the bearing 30a is placed on the upper surface of the base 2, and the outer peripheral surface of the bearing 30a is brought into contact with the positioning member 4. Thereafter, the above procedure is repeated, and the bush 31 is extracted from the bearing 30a at the other end of the torque rod 30.

Next, a description will be given of a method of using the bush 31 for fitting the bush 31 to the bearing body 30a with respect to the bush extracting and fitting apparatus according to the first embodiment. First, the bearing 30a at one end of the torque rod 30 is placed on the upper surface of the base 2, the outer peripheral surface of the bearing 30a is brought into contact with the positioning member 4, and the torque is slid according to the length of the torque rod 30. The other end of the torque rod 30 is placed on the rod support member 9, and the torque rod 30 is horizontally provided between the base 2 and the torque rod support member 9. After the bush 31 was placed horizontally with the outer periphery of the ring-shaped member 31b of the bush 31 aligned with the inner periphery of the bearing 30a mounted on the base 2, the fitting jig 12 was placed on the bearing 30a. Shaft 31 of bush 31
a. The fitting jig 12 is a shaft 31 of a bush 31.
a, the shaft 31 of the bush 31
When the fitting jig 12 is fitted to a, the central axis of the bush 31 and the central axis of the fitting jig 12 are located coaxially.

Next, the shaft 13c of the jack 13 in which the pressure head 13a of the jack 13 is suspended by the suspension member 7
Is moved up and down with the oil valve in the hydraulic mechanism of the jack 13 closed, the cylinder 13b
, And the lower end surface 13 d of the jack 13 contacts the upper end surface of the fitting jig 12. When the shaft 13c is further moved up and down, the pressing head 13a is pressed against the pressing member 6, and the lower end 13d of the jack 13 presses the upper end surface of the fitting jig 12. As the cylinder 13b is pushed out, the bush 31 is pushed by the fitting jig 12 and fitted inside the bearing body 30a. Since the fitting jig 12 has an edge 12a having an end surface that comes into contact with the end surface of the bearing body 30a, the edge 12a of the fitting jig 12 after the bush 31 is fitted to the bearing body 30a. Is brought into contact with the end face of the bearing 30a and does not enter the bearing 30a, so that the bush 31 is completely fitted inside the bearing 30a. Next, the pressure head 13a of the jack 13 is slid from the suspension member 7 to remove the jack 13, and the oil valve in the hydraulic mechanism of the jack 13 is opened, and the pressure head 13a is stepped on with a foot, for example. Pressure head 13a
To the cylinder 13b,
b is stored in the jack 13, the pressure head 13 a is inserted into the suspension member 7 again, and the jack 13 is suspended from the bush removal / fitting device 1.

Next, one end of the torque rod 30 to which the bush 31 is fitted is placed on the torque rod support member 9,
Torque rod 30 not yet fitted with bush 31
Is placed on the upper surface of the base 2 and the bearing 30
The outer peripheral surface of Oa is brought into contact with the positioning member 4. Thereafter, the above procedure is repeated, and the bush 31 is also fitted to the bearing 30a at the other end of the torque rod 30.

As described above, the device for removing and fitting the bush according to the first embodiment has the following functions. (1) Since hydraulic jacks, which are normally provided for large vehicles such as dump trucks with torque rods, are used as presses, the bush can be removed and fitted even at factories and offices where large presses are not always available. It can be carried out. (2) Since it has a slidable torque rod support member,
The distance between the base and the torque rod support member can be set arbitrarily,
A single worker can easily remove and fit the bush of the bearing body of the torque rod having various lengths. (3) When the bush is removed or fitted, the torque rod is bridged on the base and the torque rod support member.
The torque rod is stably supported, so that the bush can be smoothly removed and fitted. (4) Since the bush is pressurized by the jack via the extraction jig or the fitting jig directly fitted on the shaft of the bush,
The center axes of the jack, the bearing, the jig and the bush can be easily matched, and the bush can be smoothly pulled out and fitted without being stuck in the bearing and not falling off or being fitted obliquely. . (5) Since the bush is pressurized by the jack via the extraction jig or the fitting jig that has previously contacted the shaft of the bush, it is easy to adjust the pressing speed of the jack while checking the relationship between the jack and the jig. Thus, the bush can be smoothly removed and fitted. (6) Since the jack is suspended by the pressurizing head and is not fixed, the jack has a degree of freedom between the suspending member and the pressurizing head. Even when the lower surface of the jack is not parallel, the displacement can be absorbed by the suspension of the pressurizing head, so that there is no hindrance to removal and fitting of the bush. (7) The positioning member is fixed to the upper surface of the base by welding or the like, and can also be detachably fixed to the upper surface of the base with a screw or the like, and the position of the positioning member is adjusted according to the size of the bearing body of the torque rod. Because it can be adjusted, it is excellent in versatility and convenience that the bush of the torque rod having various outer diameter bearings can be replaced, and it is excellent in versatility and convenience, and the center axis of the bearing body and the center axis of the jack and the concave part of the base are coaxial. It is possible to prevent deformation of the bush ring member, the extraction jig and the fitting jig, and the base.

(Embodiment 2) FIG. 5 is a perspective view of a bush extraction / fitting device (jack is not shown) in Embodiment 2 and FIG. 6 is a bush extraction in Embodiment 2 of the present invention. It is a side view which shows the state which arranged the torque torque rod with which the bush was fitted in the fitting device. Note that the same components as those described in the first embodiment are denoted by the same reference numerals, and description thereof is omitted. In the drawing, reference numeral 1a denotes a bush extraction / fitting device according to the second embodiment, 14 denotes an upper surface on which the lower end surface 13d of the jack 13 abuts, and on the lower surface, the extraction jig 11 and the fitting jig 1
A contact member 15 surrounded by a support post 5 with which the upper end surface of the contact member 2 contacts is fixed to an upper surface of the contact member 14, and
3 is a frame to which the outer edge of the lower end surface 13d is in contact, and when the outer edge of the lower end surface 13d of the jack is in contact with the frame 15,
The center axis of the pressure head 13 a defined by the suspension member 7 and the contact member 8 is disposed at the same position as the center axis of the bearing 30 a defined by the positioning member 4. Reference numeral 16 denotes an elastic body made of a helical spring and the like stretched between the pressure contact member 6 and the contact member 14, and is displaced by the press by the jack 13, and returns to its original state when the press mechanism of the jack 13 is opened. The one having a constant is used. 17 is a press-contact member 6
The distance between the lower surface of the cylinder 13 and the upper surface of the
This is a stopper fixed to the column 5 so as not to be shorter than the length from the lower end surface 13d of the jack 13 to the tip of the pressure head 13a when b is stored in the jack 13. Reference numeral 18 denotes a caster having a base fixed to the side of the base 2, and 19 denotes a caster 1 which is provided on the upper or
Reference numeral 20 denotes a handle used when the bush extraction / fitting device 1a is transported by using the reference numeral 8, and reference numeral 20 denotes a storage portion such as the extraction jig 11 and the fitting jig 12 fixed to the upper surface of the press contact member 6. In the second embodiment, the thickness of the extraction jig 11 in the axial direction is the same as the thickness of the fitting jig 12 in the axial direction and the thickness of the ring member 31 b fitted to the inner peripheral surface of the bearing body 30 a of the bush 31. This is substantially the same as the one obtained by adding the thickness in the axial direction.

The operation of the thus configured device for removing and fitting a bush according to the second embodiment will be described below in comparison with the device for removing and fitting a bush according to the first embodiment. When removing and / or fitting the bush, the cylinder 13b pushed out from the jack 13 by hydraulic pressure
The extraction jig and / or the fitting jig are pushed by the pressure head 13a at the tip of the above, and the extraction and / or fitting of the bush is performed. Next, when removing and / or fitting the bush, unless the cylinder 13b is stored in the jack 13 in advance, the cylinder 13b cannot be pushed out of the jack 13 to remove and / or fit the bush. In the device 1 for removing and fitting a bush according to the first embodiment, in order to store the cylinder 13b in the jack 13, the pressure head 13a is slid from the suspension member 7 to remove the jack 13, and the oil in the hydraulic mechanism is removed. After the valve is opened, it is necessary to apply a load in the direction of the cylinder 13b to the pressing head 13a by, for example, stepping on the pressing head 13a with a foot. On the other hand, in the device 1a for removing and fitting a bush according to the second embodiment, the elastic body 16 stretched between the press contact member 6 and the contact member 14 provides
Since the contact member 14 is urged in the direction of the pressure contact member 6, the cylinder 13b is stored in the jack 13 simply by opening the oil valve in the hydraulic mechanism without removing the jack 13. This is because the elastic body 16 has an elastic constant that is displaced by the pressurization by the jack 13 and returns to the original state when the pressurizing mechanism of the jack 13 is opened.

The distance between the lower surface of the press-contact member 6 and the upper surface of the contact member 14 is set at the lower end surface 1 of the jack 13 when the cylinder 13b is stored in the jack 13.
Since the stopper 17 is fixed to the column 5 so as not to be shorter than the length from 3d to the tip of the pressure head 13a, the jack 13 can be attached and detached. In addition,
The axial thickness of the extraction jig 11 is obtained by adding the axial thickness of the fitting jig 12 and the axial thickness of the ring member 31b fitted to the inner peripheral surface of the bearing body 30a of the bush 31. Therefore, if the position of the stopper 17 is set so that the extraction jig 11 can be fitted to the bearing body 30a, even if the attachment member 14 is pressed by the stopper 17, Can also be fitted on the bush 31 provided on the bearing body 30a. In addition, since the casters 18 are provided on the base, the handle 19 is used to tilt the bush removal / fitting device 1a in the direction in which the casters 18 are provided. Can be transported. Further, since the storage portion 20 is provided on the upper surface of the press contact member 6, the extraction jig 11 and the fitting jig 12 which are likely to be lost can be stored, and can be conveyed together with the bush's extraction and fitting device 1a. It is convenient. Further, the pressing member 6 to which pressure is applied by the pressing head 13a can be reinforced, and the pressing member 6 is prevented from being deformed.

As described above, the device for removing and fitting the bush according to the second embodiment has the following functions. (1) Since the contact member is urged in the direction of the press member by the elastic body stretched between the press member and the contact member,
The cylinder pushed out of the jack can be stored in the jack only by opening the oil valve in the hydraulic mechanism without removing the jack. (2) Since the stopper fixed to the column holds down the contact member urged in the direction of the pressure contact member, the jack can be easily attached to and detached from the device, and a large press machine is not always provided. Also, in business offices and the like, the bush can be pulled out or fitted using a hydraulic jack normally provided in a large vehicle such as a dump truck having a torque rod. (3) The axial thickness of the extraction jig is substantially equal to the sum of the axial thickness of the fitting jig and the axial thickness of the ring member fitted to the inner peripheral surface of the bearing body of the bush. Because they are the same,
The distance between the attachment member and the base can be set to a minimum,
The size of the device can be reduced, and the time required for pushing out the cylinder for removal and fitting can be shortened. (4) Since the bush has a caster, it is easy to carry the bush removal / fitting device, and the bush can be removed / fitted immediately beside a dump truck or the like which requires replacement of the bush. Sometimes they can be kept out of the way. (5) The storage portion fixed to the upper surface of the press-contact member can store the extraction jig, the fitting jig, and the like, which are likely to be lost. Accordingly, the pressure contact member to which pressure is applied can be reinforced, and deformation of the member can be prevented.

[0032]

As described above, the following advantageous effects can be obtained according to the bush extraction / fitting device of the present invention. According to the first aspect of the present invention, (1) a jack provided in a large vehicle such as a dump truck having a torque rod is used as a press machine, and the jack is configured to be detachable. It is possible to provide a bush extraction / fitting device that is excellent in versatility and cost, and can be used to extract / fit a bush even in a factory or a business place where a press machine is not always provided. (2) Since the positioning member is provided for positioning using the outer peripheral surface of the bearing body for extracting and fitting the bush and the outer edge of the pressure head of the jack, the center axis of the jack, the bearing body and the bush can be easily provided. Thus, it is possible to provide a bush extraction / fitting device which is excellent in the quality of the obtained bearing body and which is easy to operate. (3) Since the jack is suspended by the pressure head and is not fixed, the jack has a degree of freedom between the suspension member and the pressure head, and presses the end face of the bush for removal and fitting. Even when the end surface of the member to be connected is not parallel to the lower end surface of the jack, the displacement can be absorbed by the suspension portion of the pressure head, so that it is possible to provide a bush extraction and fitting device with excellent stability. .

According to the invention described in claim 2, according to claim 1
In addition to the above effects, the distance between the base and the torque rod support member can be set arbitrarily, and the torque rod can be held horizontally with the base regardless of the unevenness of the floor surface.
It is possible to provide a bush extraction / fitting device which is excellent in versatility and operability, which can easily extract and fit a bush of a torque rod having various lengths.

According to the third aspect of the present invention, the first aspect is provided.
Or in addition to the effect of (2), (1) Since the bush is pressurized by the jack via the extraction jig or the fitting jig directly fitted on the shaft of the bush,
The center axes of the jack, the bearing, the jig and the bush can be easily matched, and the obtained bearing can be provided with excellent quality and easy operation of removing and fitting the bush. (2) The bush is pressurized by a jack via a removing jig or a fitting jig which is previously fitted and abutted on the shaft of the bush, so that it is easy to adjust the pressing speed of the jack. An apparatus can be provided.

According to the invention described in claim 4, according to claim 1
In addition to the effect of any one of (1) to (3), the device can be easily transported, so that the bush can be removed or fitted immediately beside the vehicle where the torque torque rod such as a dump truck must be replaced. It is possible to provide a bush extraction / fitting device which is excellent in convenience and can be placed in a place where it is not obstructed when not in use.

According to the invention described in claim 5, according to claim 1,
In addition to the effects of any one of (1) to (4), the cylinder extruded from the jack can be opened by simply opening the oil valve in the hydraulic mechanism of the jack without applying external force for removing the jack and storing it in the jack. Thus, it is possible to provide a bush extraction / fitting device excellent in operability, in which the cylinder can be stored in the jack again by the biased elastic body.

According to the invention of claim 6, according to claim 1,
In addition to the effects of any one of (1) to (5), it is possible to store the extraction jig and the fitting jig which are apt to be lost, to be transported together with the device, and to reinforce the pressure contact member to which the pressure is applied by the pressure head, It is possible to provide a bush extraction / fitting device which can prevent the deformation and is excellent in workability and durability.

According to the invention of claim 7, according to claim 1,
In addition to the effect of any one of the above items 6, the working efficiency can shorten the distance between the base and the press-contact member, reduce the size of the device, and shorten the time required for pushing out the cylinder for extracting and fitting. It is possible to provide a bush extraction / fitting device which is excellent in quality.

[Brief description of the drawings]

FIG. 1 is a perspective view of a bush extraction / fitting device according to Embodiment 1 of the present invention.

FIG. 2 is a side view showing a state in which the torque rod with the bush fitted thereto is arranged in the bush extraction / fitting device according to the first embodiment;

3 is a cross-sectional end view of an essential part taken along line AA of FIG. 2, showing a state in which the bush is removed from the torque rod on which the bush is fitted.

FIG. 4 is a sectional end view of a main part taken along line AA of FIG. 2 showing a state in which a bush is fitted to the torque rod.

FIG. 5 is a perspective view of a bush extraction / fitting device according to a second embodiment of the present invention.

FIG. 6 is a side view showing a state in which the torque rod with the bush fitted thereto is arranged in the bush removal / fitting device according to the second embodiment;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pull-out fitting device of the bush of Embodiment 1 1a Pull-out fitting device of the bush of Embodiment 2 2 Base 2a Frame 2b Plate-like member 3 Depression 4 Positioning member 5 Support 6 Press-contact member 7 Suspension member 8 Contact member 9 Torque rod support member 9a Sliding and locking portion 10 Support member 11 Extraction jig 12 Fitting jig 12a Edge 13 Jack 13a Pressurizing head 13b Cylinder 13c Shaft 13d Lower end surface 14 Joint member 15 Frame 16 Elasticity Body 17 Stopper 18 Caster 19 Handle 20 Storage section 30 Torque rod 30a Bearing body 31 Bush 31a Shaft 31b Ring member 31c Rubber

Claims (7)

[Claims] 1. A base provided with a concave portion on an upper surface, on which a bearing body of a torque rod on which a bush is to be extracted and fitted is mounted, a support erected on the support, and erected on the support. The pressure contact member of the pressure head of the jack, the suspension member of the pressure head provided in the pressure contact member, the central axis of the bearing body, the central axis of the suspended pressure head, And a positioning member provided on the suspension member and / or the press-contact member. 2. A torque rod supporting member for bridging the torque rod horizontally with the base is slidably provided on a member laterally provided on the base.
6. The device for removing and fitting a bush according to claim 5. 3. A removal jig having at least one end having an inner edge fitted on the shaft of the bush and an outer edge fitted on the bearing body, and / or (b) fitted on the shaft of the bush. A fitting jig having at least one end having an inner edge and an edge having an end face abutting against the end face of the bearing body,
The bush removal / fitting device according to claim 1 or 2, further comprising: 4. A caster is fixed to the base, and
The bush removal / fitting device according to any one of claims 1 to 3, wherein an outer peripheral lower end of a wheel of the caster is fixed at a position higher than a lower end of the base. 5. The apparatus according to claim 1, further comprising: a contact member for contacting a lower end of the suspended jack; and an elastic body stretched between the contact member and the pressure contact member. 1
5. The device for removing and fitting a bush according to any one of items 4 to 4. 6. The storage device according to claim 1, wherein a storage portion for storing the extraction jig, the fitting jig, and the like is fixed to an upper portion of the press-contact member. Pull-out fitting device for bush. 7. The axial thickness of the extraction jig is determined by the axial thickness of the fitting jig and the axial thickness of the ring member of the bush fitted on the inner peripheral surface of the bearing body. The bush removal / fitting device according to any one of claims 1 to 6, wherein the device is substantially the same as the added one.