JP7074524B2 - Seal removal device and seal removal method - Google Patents

Description

Application of Article 30, Paragraph 2 of the Patent Law Sales catalog "2018 New Year Honda General-purpose Service Equipment Campaign" issued by Kaiya Printing Co., Ltd. on January 22, 2018.

The present invention relates to a seal removing device and a seal removing method.

Conventionally, those disclosed in Patent Document 1 are known as those for removing adhered substances. The sticking object removing tool disclosed in Patent Document 1 is designed to remove foreign matter stuck to the surface of an object, and is rotated within a predetermined range with respect to the base 2 attached to the rotary tool and the base 2. It has an arm portion 3 that is movably supported, and a shock absorbing means 4 that is coordinated between the arm portion 3 and the substrate 2, and a striking portion is formed at the tip of the arm portion 3. It has become.

In the sticking object removing tool having such a configuration, the hitting portion rotated at high speed strongly collides with the sticking object, so that the sticking substance can be removed reliably and efficiently. Moreover, since the recoil generated at that time is absorbed by the shock absorbing means 4, the object itself is not damaged. In addition, the vibration transmitted to the operator is reduced, the burden is greatly reduced, and the noise is also reduced.

Japanese Unexamined Patent Publication No. 2004-216460

By the way, conventionally, for example, a vehicle or agricultural machinery equipped with an oil seal fitted in a shaft hole portion of a housing through which a rotating shaft penetrates, that is, a so-called shaft seal seal, is placed in a harsh usage environment. There was a problem that the shaft seal was stuck due to deterioration of the seal. For this reason, it has been difficult to remove the shaft seal that is interposed between the rotating shaft and the shaft hole.

For example, when removing the shaft seal from the shaft hole portion, for example, it is necessary to remove the gear mechanism provided between the shaft hole and the rotation shaft connected to the gear mechanism. Further, after removing the rotating shaft, a simple method such as pressing the tip from the inner peripheral side of the shaft seal with a tool having a sharp tip and removing the shaft while prying it is usually performed. Therefore, since it is necessary to apply a considerable force to the press-fitted shaft seal, there is a problem that the tool is broken. Moreover, since the shaft seal cannot be easily removed, there is a problem that workability is poor.

Therefore, the present invention provides a seal removing device and a seal removing method having excellent workability, which can easily remove the shaft seal sealed in the shaft hole portion of the housing through which the rotating shaft penetrates without removing the rotating shaft. The purpose is to do.

In order to achieve the above object, the seal removing device according to the present invention has a shaft sealing seal (54) fitted in a shaft hole portion (52a) of a housing (51) through which a rotating shaft (53) penetrates. A seal removing device (1) for removing from a hole , the device body (10) forming a cylindrical body shape in which the base end is closed and the tip is opened, and a space (11) for introducing the rotation axis is formed. A grip portion (14) provided on the base end side of the apparatus main body so as to be grippable, and a substantially cylindrical biting portion (15) provided on the tip end side of the apparatus main body and inserted into the shaft hole portion. The grip portion (14) is anti-slip processed, and the biting portion has a thread portion (17) protruding toward the inner peripheral wall surface of the shaft hole portion and the screw thread. It is characterized by having a plurality of threaded cutting edge portions (19) formed along longitudinal notch grooves (18a, 18b, 18c, 18d) intersecting the portions. Further, the apparatus main body has a female screw hole portion (12) formed in the central axial direction extending from the closed base end to the space, and has a protrusion (22) screwed to the female screw hole portion. The rotation operation member (20) is detachably mounted on the end surface of the apparatus main body on the proximal end side.

With this configuration, in the seal removing device according to the present invention, the rotating shaft is taken out by the force in the pulling direction as it is, by taking out the device main body in which the biting portion is threaded into the inner peripheral wall surface of the shaft seal. The shaft seal sealed in the shaft hole of the housing through which the wheel penetrates can be easily removed.

The work of removing the shaft seal at that time can be handled by inserting and rotating the device body into the shaft hole with the rotating shaft housed inside, and then taking it out, which is excellent in workability. ..

Further, the insertion, rotation, and removal work of the device main body is premised on the state where the rotating shaft is housed inside the device main body, and it is not necessary to remove the rotating shaft before the above work.

Further, in the seal removing device according to the present invention, the threaded portion of the biting portion may have an outer surface tapered shape that gradually reduces in diameter toward the tip end side away from the grip portion.

With this configuration, the seal removing device according to the present invention can insert the tip portion of the biting portion between the outer peripheral surface of the rotating shaft and the inner peripheral wall surface of the shaft sealing seal more easily and with a smaller force, and the shaft sealing can be performed. Workability regarding the removal of the seal can be further improved.

Further, the seal removing device according to the present invention is provided with a take-out assisting member (30) that is screwed to the main body of the device and abuts on the end face portion (53a) of the rotating shaft, and is engaged with the shaft seal. When the portion is bitten, the shaft sealing seal is configured to be removed from the shaft hole portion by rotating the take-out assisting member in the screwing direction.

With this configuration, the seal removing device according to the present invention can obtain an auxiliary action of the force for taking out the main body of the device by rotating the take-out assisting member in the screwing direction, and the shaft seal is compared with the device in which such an auxiliary action cannot be expected. The seal can be removed more easily.

Further, in the seal removing device according to the present invention, the shaft sealing seal has a metal ring (54d) fitted to the shaft hole portion, and the thread portion of the biting portion is the metal. It may be configured so that it can be bitten into the inner peripheral portion of the ring in a threaded state.

With this configuration, the seal removing device according to the present invention can make the biting stronger by biting the threaded portion of the biting portion into the inner peripheral portion of the metal ring, and the shaft sealing seal can be made more reliable. Will be able to be removed.

In the seal removing method according to the present invention, in order to achieve the above object, the shaft sealing seal (54) fitted in the shaft hole portion (52a) of the housing (51) through which the rotating shaft (53) penetrates is used as the shaft. A seal removing method for removing a seal from a hole , in which a non-slip grip portion (14) and the base are formed on a closed base end side having a cylindrical body shape forming a space (11) for introducing the rotation axis. A female screw hole portion (12) in the direction of the central axis that reaches the space from the end is formed, and a thread portion that protrudes toward the inner peripheral wall surface of the shaft hole portion on the tip side inserted into the shaft hole portion. A substantially cylindrical bite having a (17) and a plurality of threaded cutting edge portions (19) formed along a vertical notch groove (18a, 18b, 18c, 18d) intersecting the threaded portion. An apparatus main body (10) having a portion (15) formed therein is prepared, and a rotation operating member (20) having a protrusion (22) screw-coupled to the female screw hole portion and a bolt that can be screw-coupled to the female screw hole portion. After preparing the take-out auxiliary member (30) and introducing the rotating shaft into the space of the apparatus main body, the apparatus main body is rotated by the rotation operating member in the screwing direction of the engaging portion. By doing so, the biting portion is engaged with the shaft sealing seal in a retaining state, and under the retaining state, the rotation operating member is detached from the female screw hole portion of the apparatus main body, and the female screw hole is provided. The bolt-shaped take-out assisting member (30) is screw-coupled to the portion, and the take-out assisting member is rotated in the screwing direction while abutting against the rotating shaft to remove the shaft seal from the shaft hole portion. It is characterized by that.

With this configuration, in the seal removing method according to the present invention, after preparing the device main body and the rotation operating member of the seal removing device, the rotation operating member is attached to the device main body , and the biting portion is on the inner peripheral portion of the shaft seal. A series of operations in which the rotation operation member is operated so as to be pushed into and rotated in the shaft hole until it is in the engaged state, the take-out assist member is attached in place of the rotation operation member, and the take-out assist member is further rotated in the screwing direction. Through the above steps, the main body of the device in which the shaft sealing seal whose biting portion is separated from the shaft hole portion is engaged can be taken out from the shaft hole portion. Therefore, in the present invention, it is not necessary to remove the rotating shaft or to pry the hardened shaft seal with the tip of a tool having a sharp tip, and the shaft seal can be taken out extremely easily. It can be done and has excellent workability.

The present invention provides a seal removing device and a seal removing method having excellent workability, which can easily remove a shaft seal sealed in a shaft hole portion of a housing through which the rotating shaft penetrates without removing the rotating shaft. Can be done.

It is a perspective view which shows the structure of the seal removing apparatus which concerns on one Embodiment of this invention. 1 is a side view of the main body of the seal removing device, FIG. 2A shows a left side view, and FIG. 2B shows a right side view. FIG. 2A is a cross-sectional view taken along the line AA of the main body of the apparatus in FIG. 2A. It is sectional drawing which shows the schematic structure of the vehicle provided with the shaft seal seal. It is a perspective view which shows the process of attaching the 1st auxiliary member based on the seal removal method using the seal removal apparatus which concerns on one Embodiment of this invention. It is a perspective view which shows the process which follows the process of FIG. 5, FIG. 6 (a) shows the process of pushing in while rotating the apparatus main body, and FIG. 6 (b) shows the process of biting a shaft seal seal. 6A is a perspective view showing a step following the step of FIG. 6A, FIG. 7A shows a step of removing the first auxiliary member, and FIG. 7B shows a step of attaching the second auxiliary member. There is. 7 (b) is a perspective view showing a process following the process of FIG. 7 (b), FIG. 8 (a) shows a process of rotationally driving the second auxiliary member, and FIG. 8 (b) shows a process of removing the second auxiliary member. ing. 7 is a cross-sectional view taken along the line BB of FIG. 7A. 7 (b) and 8 (a) are cross-sectional views, FIG. 10 (a) is a cross-sectional view taken along the line CC of FIG. 7 (b), and FIG. 10 (b) is FIG. 8 (a). It is a cross-sectional view by the DD line of.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

The seal removing device 1 according to an embodiment of the present invention has the configurations shown in FIGS. 1 to 3 as described in detail later. This seal removing device 1 is used, for example, to remove the shaft seal seal 54 of the vehicle 50 having the oil seal structure shown in FIG. Here, first, the vehicle 50 to be removed from the shaft seal seal 54 will be described.

As shown in FIG. 4, the vehicle 50 includes a housing 51, a protruding shaft 52 provided integrally with the housing 51 and having a shaft hole portion 52a, and a rotating shaft 53 penetrating the shaft hole portion 52a of the protruding shaft 52. A shaft sealing seal 54 that is fitted into the shaft hole portion 52a with the rotating shaft 53 penetrated and seals the filled oil between the shaft hole portion 52a and the rotating shaft 53 is provided.

The shaft seal 54 overlaps the inner packing 54a, which is an annular member having an inner diameter smaller than the outer diameter of the rotating shaft 53, and the outer ring 54b, which is an annular member having an inner diameter larger than that of the inner packing 54a, in the circumferential direction. It is composed of a combination. A metal inner ring 54c made of, for example, a general cold-rolled steel plate (SPCC) or the like is embedded in the inner required position of the outer ring 54b. Further, the portion of the inner ring 54c protruding from the outer ring 54b is embedded in a part of the inner packing 54a. A spring 54d made of, for example, a metal ring is incorporated in the inner packing 54a so as to surround the outer circumference thereof. The spring 54d presses the inner peripheral side of the inner packing 54a against the rotating shaft 53 side, and fits the spring 54d into the shaft hole portion 52a so as to secure the oil seal state.

The shaft seal 54 having the structure shown in FIG. 4 and fitted to the shaft hole portion 52a with the rotating shaft 53 penetrating has the rotating shaft 53 on the inner peripheral side of the inner packing 54a. On the outside, the outer peripheral side of the outer ring 54b is in close contact with the inner peripheral side of the shaft hole portion 52a. As a result, the shaft seal seal 54 seals the oil filled between the shaft hole portion 52a and the rotary shaft 53 on the left side surface side of the shaft seal seal 54 in FIG.

Next, the configuration of the seal removing device 1 according to the present embodiment will be described with reference to FIGS. 1 to 3.

As shown in FIG. 1, the seal removing device 1 according to the present embodiment includes a device main body 10, a first auxiliary member 20 and a second auxiliary member 30 that can be attached to and detached from the device main body 10. It is equipped with. The apparatus main body 10 is composed of, for example, a steel pipe made of carbon steel such as S45C to S55C. The first auxiliary member 20 and the second auxiliary member 30 are made of carbon steel such as S45C-D to S55C-D.

The apparatus main body 10 has an inner diameter slightly larger than the outer diameter of the rotating shaft 53 (see FIGS. 9 and 10), and has a cylindrical shape in which a space 11 for slidably accommodating the rotating shaft 53 is formed. It is composed of members.

In the apparatus main body 10, one end 10a is closed and the other end 10b is opened to form an opening 13. A hole 12 that penetrates the side surface and reaches the space 11 is formed in the central portion of the side surface of the one end 10a that faces the opening 13 of the main body 10. On the other hand, the opening 13 of the apparatus main body 10 functions as an introduction port (entrance) for introducing the rotary shaft 53 into the space 11 from the tip portion thereof in the work of removing the shaft seal seal 54 (see FIGS. 5 to 8). Fulfill.

The apparatus main body 10 has a cylindrical grip portion 14 that can be gripped by an operator when removing the shaft seal seal 54 (see FIGS. 5 to 8), and a shaft hole portion 52a that is integrally formed with the grip portion 14. It is provided with a substantially cylindrical biting portion 15 to be inserted into the .

The grip portion 14 is formed to have a predetermined length in the direction of the central axis C1 (see FIG. 3) from one end 10a side of the apparatus main body 10. The grip portion 14 may be, for example, anti-slip processed to form a mesh-like shallow groove or the like integrally on the surface thereof.

The biting portion 15 has a non-tapered portion 16a and a tapered portion 16b arranged in order from the end portion on the one end 10a side of the device main body 10 to the other end 10b in the grip portion 14.

The non-tapered portion 16a has a uniform outer diameter, and the tapered portion 16b has a tapered shape in which the diameter is gradually reduced toward the other end 10b side of the apparatus main body 10.

The non-tapered portion 16a and the tapered portion 16b are provided with a threaded portion 17 connected to the outer periphery of both. Further, notch grooves 18a, 18b, 18c, 18d that cross the threaded portion 17 in the central axis C1 direction of the apparatus main body 10 are formed on the outer periphery of the non-tapered portion 16a and the outer periphery of the tapered portion 16b.

As described above, in the apparatus main body 10, the biting portion 15 has a threaded portion 17 protruding toward the inner peripheral wall surface of the shaft hole portion 52a, and vertical notch grooves 18a and 18b intersecting the threaded portion 17. , 18c, with a plurality of thread cutting edge portions 19 formed along 18d. As shown in FIGS. 1 and 2A, the plurality of thread cutting edge portions 19 have a pair of thread cutting edge portions 19a and 19b, 19c and 19d, 19e corresponding to the notch grooves 18a, 18b, 18c, 18d, respectively. And 19f, 19g and 19h. The threaded portion 17 of the biting portion 15 constitutes the tapered portion 16b described above, and has an outer surface tapered shape in which the diameter is gradually reduced toward the tip side away from the grip portion 14.

In the present embodiment, as clearly shown in FIG. 2A, the notch grooves 18a, 18b, 18c, and 18d have a U-shaped cross section and are arranged so as to be separated from each other by 90 degrees in the circumferential direction. ing. The groove shapes of the notch grooves 18a, 18b, 18c, and 18d are not limited to the U-shaped cross section, and may be various groove shapes. Further, the configuration in which the four notch grooves 18a, 18b, 18c, and 18d are provided is a preferable embodiment, but the present embodiment is not limited to this, and at least two or more notch grooves 18 may be formed. ..

Further, in the configuration of the biting portion 15 described above, the taper angle of the outer surface tapered shape of the threaded portion 17 is set to an appropriate value. Here, for example, in FIG. 3, a line segment connecting the apex portions of adjacent threads in the thread portion 17 of the tapered portion 16b of the biting portion 15 in the direction of the central axis C1 of the apparatus main body 10 (line segment indicated by a one-point chain line). The angle formed by the central axis C1 is defined as the taper angle of the biting portion 15.

In the present embodiment, it is desirable that the taper angle of the portion constituting the tapered portion 16b of the biting portion 15 is within the range of 20 degrees to 40 degrees. The preferred taper angle is, for example, 30 degrees. In the seal removing device 1 according to the present embodiment, it is assumed that the taper angle of the biting portion 15 is 30 degrees.

The apparatus main body 10 having the above-described configuration has the shape shown in FIG. 2A when viewed from the other end 10b side. As shown in FIG. 2A, in the apparatus main body 10, the biting portion 15 includes a pair of thread cutting blade portions 19a, 19b, and 19c corresponding to the four notch grooves 18a, 18b, 18c, and 18d, respectively. It has 19d, 19e and 19f, 19g and 19h. These thread cutting blade portions 19a, 19b, 19c, 19d, 19e, 19f, 19g, and 19h are formed so as to extend in the direction of the central axis C1 of the device main body 10, and are formed when the shaft seal seal 54, which will be described later, is removed. When the 10 is pushed into the shaft hole portion 52a (see, for example, FIG. 9), it serves to facilitate the insertion of the tapered portion 16b into the inner peripheral surface portion of the shaft seal seal 54.

Further, the biting portion 15 has a threaded portion 17 integrally formed on the outer periphery, and according to the structure of such a threaded portion 17, the apparatus main body 10 is pushed into the shaft hole portion 52a after the apparatus main body 10 is pushed into the shaft hole portion 52a. The rotation brings about an action of facilitating the thread portion 17 of the tapered portion 16b from being easily bitten into the inner peripheral surface portion of the shaft seal seal 54. In the present embodiment, the shaft sealing seal 54 has a spring 54d for fitting and wearing to the shaft hole portion 52a, and the threaded portion 17 of the engaging portion 15 is engaged with the inner peripheral portion of the spring 54d in a threaded state. It has a structure that can be included.

Further, the apparatus main body 10 has the shape shown in FIG. 2B when viewed from one end 10a side. In the device main body 10, a first auxiliary member 20 and a second auxiliary member 20 and a second auxiliary are provided in the surface facing the opening 13, that is, the hole portion 12 provided in the end surface of the device main body 10 (grip portion 14) on the one end 10a side. A female thread for mounting the member 30 is formed.

Here, the configuration of the first auxiliary member 20 and the second auxiliary member 30 will be described. As shown in FIG. 1, the first auxiliary member 20 is provided on one end side of a columnar first auxiliary member main body portion 21 and a first auxiliary member main body portion 21, and a hole portion 12 of the apparatus main body 10 is provided. A bolt-shaped protrusion 22 having a male screw thread that can be rotationally inserted into the female screw thread formed in the above, and a rod-shaped operation provided on the other end side of the first auxiliary member main body 21 and protruding outward from the radiation. It is provided with a unit 23. As a result, the first auxiliary member 20 is screwed into the female thread of the hole 12 of the apparatus main body 10 with the male thread of the protrusion 22 of the first auxiliary member main body 21 in the screwing direction, for example. It can be attached to the device main body 10 (the end face of the grip portion 14 on the one end 10a side) in the embodiment shown in 5.

Further, as shown in FIG. 1, the second auxiliary member 30 is a bolt-shaped second auxiliary member main body that can be rotationally inserted into the female thread formed in the hole 12 of the apparatus main body 10 and has a male thread. A fitting head 32 provided on the other end side of the second auxiliary member main body 31 and fitting the second auxiliary member main body 31 into the rotating tool so that the male screw thread can be rotationally inserted. It is equipped with. In the present embodiment, the fitting head 32 is, for example, a member having a hexagonal shape when viewed from the upper surface, and has a structure integrated with the second auxiliary member main body portion 31. As a result, the second auxiliary member 30 is screwed into the hole portion 12 of the apparatus main body 10 with the male thread of the second auxiliary member main body portion 31 in the screwing direction, whereby the first auxiliary member 20 described above (FIG. FIG. Instead of 5), it can be attached to the apparatus main body 10 in the manner shown in FIG. 7 (b), for example.

Next, a seal removing method using the seal removing device 1 according to the present embodiment will be described with reference to FIGS. 5 to 10.

In the seal removing step of removing the shaft seal seal 54 in the vehicle 50 shown in FIG. 4, first, the apparatus main body 10 constituting the seal removing device 1, the first auxiliary member 20, and the second auxiliary member 30 (FIG. 4). 1) is prepared. Each of these members is provided, for example, stored in a case as a seal removing tool set or the like.

After the process of preparing the device main body 10, the first auxiliary member 20, and the second auxiliary member 30 is completed, the seal removing step according to the present embodiment is a step of mounting the first auxiliary member 20 on the device main body 10. And proceed.

In this step, as shown in FIG. 5, the operator attaches the tip of the protrusion 22 of the first auxiliary member main body 21 of the first auxiliary member 20 to one end 10a of the device main body 10, that is, the grip portion 14. The position is adjusted so that it can be screwed into the hole 12 on the base end side separated from the biting portion 15. Subsequently, the operator attaches the first auxiliary member 20 to the base end side of the grip portion 14 by rotating the operation portion 23 in the direction of the arrow in FIG. 5 and screwing the protrusion portion 22 into the hole portion 12.

Next, in the seal removing step according to the present embodiment, the device main body 10 to which the first auxiliary member 20 is mounted is in a state where the biting portion 15 is bitten into the inner peripheral portion of the shaft sealing seal 54. The process proceeds to the step of inserting the shaft hole 52a into the shaft hole portion 52a by pushing the shaft 53 while rotating it with respect to the rotating shaft 53 accommodated in the direction (see FIG. 6).

In this step, as shown in FIG. 6A, the operator first aligns the end face portion 53a of the rotating shaft 53 into the opening portion 13 of the apparatus main body 10 to which the first auxiliary member 20 is mounted. After that, the operation unit 23 of the first auxiliary member 20 is operated, and the apparatus main body 10 is gradually pushed forward while rotating in the circumferential direction. As a result, the apparatus main body 10 gradually enters the inner side of the shaft hole portion 52a with the rotating shaft 53 accommodated in the space 11, and in the process, the threaded portion 17 (taperer) of the engaging portion 15 The portion 16b) abuts on the inner peripheral surface portion of the shaft seal seal 54.

Subsequently, as shown in FIG. 6B, for example, the operator continues the work of rotating the apparatus main body 10 in the direction shown and pushing it forward while operating the operation unit 23 of the first auxiliary member 20. do. By continuing this work, the degree to which the threaded portion 17 of the biting portion 15 bites into the inner peripheral surface portion of the shaft seal seal 54, more specifically, the inner peripheral portion of the spring 54d in the threaded state gradually increases. It will increase.

In the step shown in FIG. 6B, after pushing the apparatus main body 10 to a desired position, in the seal removing step according to the present embodiment, the second auxiliary member 30 is replaced with the first auxiliary member 20. The process proceeds to a step of rotating the second auxiliary member 30 in the screwing direction until the tip end portion of the second auxiliary member 30 abuts on the end surface portion 53a of the rotating shaft 53 and mounting the second auxiliary member 30 on the base end side of the grip portion 14 (see FIG. 7).

In this step, first, as shown in FIG. 7A, the apparatus main body 10 is held at the position shown in FIG. 6A, and then the operation unit 23 of the first auxiliary member 20 is opposite to that at the time of mounting. The first auxiliary member 20 is removed from the hole 12 of the apparatus main body 10 by rotating it to the side.

Before removing the first auxiliary member 20 in FIG. 7A, the positional relationship between the biting portion 15 of the apparatus main body 10 and the shaft sealing seal 54 in the shaft hole portion 52a is, for example, FIG. The relationship is as shown in. FIG. 9 is a cross-sectional view taken along the line BB of FIG. 7A when one end of the inner ring 54c of the shaft seal 54 is fitted into the valley of the threaded portion 17 of the engaging portion 15. Is.

In FIG. 9, in the process shown in FIG. 6, in the process of pushing the apparatus main body 10 into the shaft hole portion 52a, the threaded portion 17 of the engaging portion 15 is threaded into the inner peripheral portion of the packing 54a of the shaft seal seal 54. While biting, one end of the inner ring 54c fits into the valley of the threaded portion 17 of the biting portion 15, and is in a biting state.

After the removal step of the first auxiliary member 20 shown in FIG. 7A, the seal removing step according to the present embodiment proceeds to the step of mounting the second auxiliary member 30. In this step, as shown in FIG. 7B, the operator can screw the tip of the second auxiliary member main body 31 of the second auxiliary member 30 into the hole 12 of the apparatus main body 10. Perform alignment. Subsequently, the operator turns the fitting head 32 of the second auxiliary member main body 31 by hand, for example, and stops the operation when the fitting head 32 cannot be turned any further. By this work, the second auxiliary member main body 31 can be screwed into the hole 12, and the second auxiliary member 30 can be attached to the base end side of the grip portion 14.

At this time, in the device main body 10 that houses the rotary shaft 53, the positional relationship between the second auxiliary member main body 31 and the rotary shaft 53 is as shown in FIG. 10 (a). FIG. 10A is based on the line CC of FIG. 7B when one end of the inner ring 54c of the shaft seal seal 54 is fitted into the valley portion of the threaded portion 17 of the engaging portion 15. It is a cross-sectional view.

In FIG. 10A, although the second auxiliary member 30 is replaced with respect to the apparatus main body 10, in the process of pushing the apparatus main body 10 into the shaft hole portion 52a as in the state shown in FIG. While the threaded portion 17 of the engaging portion 15 is engaged in the inner peripheral portion of the packing 54a of the shaft seal 54 in a threaded state, one end of the inner ring 54c is engaged in the valley portion of the threaded portion 17 of the engaging portion 15. It is stuck and bitten.

According to the positional relationship between the second auxiliary member main body 31 and the end face portion 53a of the rotating shaft 53 shown in FIG. 10A, from this state, the second auxiliary member main body 31 is moved in the same direction as before. By further rotating, the second auxiliary member main body 31 can be pushed forward in a state of being in contact with the end face portion 53a of the rotating shaft 53, and conversely can be pulled out in the direction opposite to the pushing direction of the device main body 10. Can be understood.

After the second auxiliary member main body 31 is attached to the device main body 10 so as to have the positional relationship shown in FIG. 10A, the seal removing step according to the present embodiment is performed on the threaded portion of the biting portion 15. With the valley portion of 17 engaged in one end of the inner ring 54c, the process proceeds to a step of further rotating the second auxiliary member 30 in the screwing direction until the shaft seal seal 54 is detached from the shaft hole portion 52a.

In this step, as shown in FIG. 8A, the operator first further rotates and drives the fitting head 32 of the second auxiliary member main body 31 in the direction shown in the drawing. This work can be performed using, for example, a rotary tool. At that time, the operator fits the fitting head 32 into a rotating tool such as a spanner (not shown), and operates the rotating tool to rotate the fitting head 32 together with the second auxiliary member main body 31. Drive. By this work, the second auxiliary member main body 31 moves so as to be further screwed into the space 11 in a state where the tip end portion of the second auxiliary member main body 31 is in contact with the end face portion 53a of the rotating shaft 53. .. Following this movement, the apparatus main body 10 moves in the direction opposite to the direction in which the second auxiliary member main body 31 moves, and gradually outwards from the shaft hole portion 52a while accommodating the rotation shaft 53. Is pulled out.

In the step shown in FIG. 8A, when the apparatus main body 10 is pulled out to the position shown in the figure, the positional relationship between the apparatus main body 10 and the shaft seal seal 54 in the shaft hole portion 52a is, for example, FIG. The relationship is as shown in (b). In FIG. 10B, the shaft seal 54 is pulled out to the outside of the shaft hole 52a while the one end of the inner ring 54c of the shaft seal 54 is fitted in the valley of the thread portion 17 of the bite portion 15. It is a cross-sectional view taken along the line DD of FIG. In FIG. 10B, in the final stage of the process shown in FIG. 8A, the thread portion 17 of the biting portion 15 follows the movement of the apparatus main body 10 being pulled out from the inside of the shaft hole portion 52a. The shaft seal seal 54 is also pulled out of the shaft hole portion 52a while the valley portion of the shaft is engaged with one end of the inner ring 54c.

Here, in the process of pushing the apparatus main body 10 into the shaft hole portion 52a, as shown in FIG. 10A, the threaded portion 17 of the engaging portion 15 is engaged with the inner peripheral portion of the packing 54a in a threaded state. One end of the inner ring 54c fits into the valley of the threaded portion 17 of the biting portion 15, and the biting state is established. When the apparatus main body 10 is pulled out to the position shown in FIG. 10B in this state, a force in the pulling direction acts on the inner ring 54c, and the shaft seal seal 54 can be easily taken out.

The seal removing device 1 according to the present embodiment can also be applied to removing an oil seal having no metal inner ring 54c. For this type of oil seal, the seal removing device 1 bites the threaded portion 17 of the biting portion 15 into an appropriate position on the inner peripheral portion of the oil seal in the process of pushing the device main body 10 into the shaft hole portion 52a. By pulling out the device main body 10 in this state, the oil seal can be taken out while applying a force in the pulling direction to the oil seal.

After the step shown in FIG. 8A is completed, the seal removing step according to the present embodiment proceeds to the step of taking out the apparatus main body 10. In this step, the operator grips the grip portion 14 from the state shown in FIG. 8A and pulls out the apparatus main body 10 in the direction of the arrow in the figure.

By this work, as shown in FIG. 8B, the apparatus main body 10 is moved from the rotating shaft 53 with the inner ring 54c of the shaft sealing seal 54 being bitten into the valley portion of the threaded portion 17 of the biting portion 15. It is taken out and taken out of the shaft hole portion 52a. At this time, the valley portion of the threaded portion 17 of the biting portion 15 may be bitten into the inner peripheral portion of the spring 54d of the shaft sealing seal 54 in a threaded state.

As described with reference to FIGS. 5 to 10, in the seal removing method using the seal removing device 1 according to the present embodiment, the step of preparing the seal removing device 1 (see FIG. 1) and the device main body 10 The step of mounting the first auxiliary member 20 that can be detached from the base end side separated from the biting portion 15 (see FIG. 5) and the main body of the device to which the first auxiliary member 20 is mounted. The 10 is pushed into the shaft while rotating with respect to the rotating shaft 53 housed in the inner side (space 11) of the apparatus main body 10 so that the biting portion 15 is in a state of being bitten into the inner peripheral portion of the shaft sealing seal 54. The step of inserting into the hole 52a and the second auxiliary member 30 that can be detached from the base end side are replaced with the first auxiliary member 20, and the tip portion of the second auxiliary member 30 is the rotating shaft 53. The step of rotating the screw in the screwing direction until it abuts on the end face portion 53a and mounting it on the base end side (see FIG. 6), and the shaft sealing seal with the biting portion 15 engaged in the inner peripheral portion of the shaft sealing seal 54. It includes a step of further rotating the second auxiliary member 30 in the screwing direction until the 54 is detached from the shaft hole portion 52a.

In order to realize a series of seal removing steps shown in FIGS. 5 to 8, in the present embodiment, it is premised that the apparatus main body 10 is provided with a biting portion 15 that bites into the shaft seal seal 54 in a retaining state. Further, an operation unit suitable for the biting operation and the removal operation after the biting is provided. That is, the seal removing device 1 according to the present embodiment has a rotation operation member corresponding to the above-mentioned first auxiliary member 20 as an operation unit suitable for the biting operation, and is an operation suitable for the removal operation after the biting. As a part, it also has a take-out auxiliary member corresponding to the second auxiliary member 30.

The rotation operation member has a configuration that can be detachably attached to the base end side separated from the biting portion 15 of the apparatus main body 10, that is, one end 10a of the apparatus main body 10. Specifically, the rotation operation member can be screw-coupled to the proximal end side screw coupling portion (female screw thread formed in the hole portion 12 of the apparatus main body 10 described above) provided on the proximal end side of the apparatus main body 10. It has a threaded joint portion, that is, a female thread in the protrusion 22 of the first auxiliary member 20 described above.

The take-out auxiliary member corresponding to the second auxiliary member 30 can be detachably attached to the base end side of the device main body 10 , and when the rotation operation member corresponding to the first auxiliary member 20 is detached from the device main body 10. It is inserted into the inside of the device main body 10 (the space 11 inside the device main body 10), abuts against the end face portion 53a of the rotation shaft 53, and is screw-coupled to the base end side screw connection portion of the device main body 10 . It has a screw-bonding portion that can be screw-coupled, that is, a male screw thread in the second auxiliary member main body portion 31 of the second auxiliary member 30 described above.

During the series of steps described above (see FIGS. 5 to 8), the rotation operating member is detachably attached to the base end side of the grip portion 14 by screw coupling in the step shown in FIG. 5 (see FIG. 5). In the steps shown in (a) and 6 (b), the operator performs an operation for pushing the grip portion 14 toward the back of the shaft hole portion 52a while rotating the grip portion 14.

The rotation operation member has, for example, a columnar first auxiliary member main body portion 21 and a rod-shaped operation portion 23 projecting outward from the radiation (see FIGS. 1, 5, and 6). With such a structure, the rotation operation member works so that the operator can easily apply force when pushing and rotating the grip portion 14, and the engagement portion 15 can be easily engaged with the shaft seal seal 54 in a retaining state. Allows suitable operation in the process.

On the other hand, the take-out auxiliary member is replaced from the rotation operation member in the process shown in FIG. 7 (b), and then in the process shown in FIG. 8 (b), the rotation drive for further screwing in the screwing direction by the operator. The operation is done.

Here, as shown in FIG. 10, the take-out auxiliary member is further described from the state where the biting portion 15 is bitten into the shaft seal seal 54 and the tip portion is in contact with the end surface portion 53a of the rotating shaft 53. As it is rotated in the screwing direction, the grip portion 14 has an auxiliary action of moving in the direction opposite to the screwing direction. As a result, the take-out assisting member does not impose a large force on the operator when taking out the grip portion 14, and brings about a suitable operation by the operator in the process.

As described above, the seal removing device 1 according to the present embodiment can be detached from the device main body 10 having the biting portion 15 that bites into the shaft seal seal 54 in a retaining state and the device main body 10. Further, it has a rotation operation member and a take-out assisting member suitable for a biting operation and a removal operation after biting.

In the seal removing device 1 having the above configuration, in particular, when the rotation operation member is detached from the device main body 10 , the take-out auxiliary member is inserted inward of the device main body 10 and abuts on the end face portion 53a of the rotary shaft 53. , The rotation operation portion can be screw-coupled to the proximal end side screw coupling portion (hole portion 12) of the apparatus main body 10 . That is, when the biting portion 15 is engaged with the shaft sealing seal 54, the seal removing device 1 removes the shaft sealing seal 54 from the shaft hole portion 52a by rotating the take-out auxiliary member in the screwing direction. It is a configuration that can be done. Further, in the seal removing device 1 of the present embodiment, the shaft seal seal 54 has a spring 54d as a metal ring for fitting and wearing to the shaft hole portion 52a, and the threaded portion 17 of the biting portion 15 has a threaded portion 17. The structure is such that it can be engaged into the inner peripheral portion of the spring 54d in a threaded state.

In the above-described example of the present embodiment, the shaft seal seal 54 to be removed is fitted into the shaft hole portion 52a of the housing 51 through which the rotating shaft 53 penetrates (see FIG. 4). The present embodiment is not limited to this, and for example, an oil seal inserted between the housing 51 and the rotary drive shaft directly protruding outward from the housing 51 may be targeted.

Further, in the above-described example of the present embodiment, only one type of device main body 10 having a predetermined inner diameter is illustrated, but the present embodiment is not limited to this, and for example, a rotating shaft 53 different for each vehicle type. A plurality of types of device main bodies 10 having an inner diameter corresponding to an outer diameter may be prepared and these may be selectively used according to the diameter of the rotating shaft 53.

As described above, the seal removing device 1 of the present embodiment removes the shaft seal seal 54 fitted to the shaft hole portion 52a of the housing 51 through which the rotating shaft 53 penetrates from the shaft hole portion 52a. The device main body 10 of the seal removing device 1 includes a grip portion 14 having a cylindrical shape that can be gripped, a substantially cylindrical biting portion 15 formed integrally with the grip portion 14 and inserted into the shaft hole portion 52a, and a substantially cylindrical biting portion 15. The engaging portion 15 is provided in a threaded portion 17 projecting toward the inner peripheral wall surface of the shaft hole portion 52a and in vertical notch grooves 18a, 18b, 18c, 18d intersecting the threaded portion 17. It has a plurality of thread cutting edge portions 19 formed along the line.

With this configuration, when the seal removing device 1 of the present embodiment is inserted into the inner peripheral wall surface of the shaft seal seal 54 by the plurality of thread cutting blade portions 19 in a threaded state, the biting portion 15 is in that state. By taking out the apparatus main body 10 as it is, the shaft sealing seal 54 fitted in the shaft hole portion 52a of the housing 51 through which the rotating shaft 53 penetrates can be easily removed.

At that time, the work of removing the shaft seal seal 54 is performed by inserting and rotating the rotating shaft 53 in the shaft hole portion 52a in a state where the rotating shaft 53 is housed in the space 11 inside the device main body 10 , that is, in the cylindrical device main body 10. After that, it can be handled by the operation of taking out the apparatus main body 10 , and the workability is excellent.

Further, the insertion, rotation, and removal work of the apparatus main body 10 is premised on the state where the rotation shaft 53 is housed inside the apparatus main body 10, and it is not necessary to remove the rotation shaft before the above work in the first place.

Further, in the seal removing device 1 of the present embodiment, the threaded portion 17 of the biting portion 15 has an outer surface tapered shape that gradually reduces in diameter toward the tip side separated from the device main body 10 .

With this configuration, the seal removing device 1 of the present embodiment can insert the tip portion of the biting portion 15 between the outer peripheral surface of the rotating shaft 53 and the inner peripheral wall surface of the shaft sealing seal 54 more easily and with a smaller force. It is possible to further improve the workability regarding the removal of the shaft seal seal 54.

Further, the seal removing device 1 of the present embodiment is provided with a second auxiliary member 30 that is screw-coupled to the device main body 10 and abuts on the end face portion 53a of the rotary shaft 53, and is provided with a second auxiliary member 30 that is engaged with the shaft seal seal 54. The shaft seal seal 54 is removed from the shaft hole portion 52a by rotating the second auxiliary member 30 in the screwing direction when the shaft is engaged.

With this configuration, the seal removing device 1 of the present embodiment further rotates the second auxiliary member 30 screwed to the device main body 10 from the state of being abutted against the end face portion 53a of the rotating shaft 53 in the screwing direction. Then, the apparatus main body 10 can be moved (backward) in the direction opposite to the screwing direction. That is, in the present embodiment, by rotating the second auxiliary member 30 in the screwing direction, an auxiliary action of the force for taking out the apparatus main body 10 is obtained, and the shaft seal seal 54 is compared with the one in which such an auxiliary action cannot be expected. Can be taken out more easily.

Further, in the seal removing device 1 of the present embodiment, the shaft seal seal 54 has a spring 54d as a metal ring for fitting and wearing to the shaft hole portion 52a, and the threaded portion 17 of the biting portion 15 has a threaded portion 17. It has a structure that can be engaged in the inner peripheral portion of the spring 54d in a threaded state.

With this configuration, the seal removing device 1 of the present embodiment can make the biting stronger by biting the threaded portion 17 of the biting portion 15 into the inner peripheral portion of the spring 54d, and the shaft sealing seal can be further strengthened. 54 can be removed more reliably. As described above, in the present embodiment, the shaft sealing seal 54 fitted in the shaft hole portion 52a of the housing 51 through which the rotating shaft 53 penetrates can be easily removed without removing the rotating shaft 53.

As described above, the seal removing device according to the present invention can easily remove the shaft seal sealed in the shaft hole portion of the housing through which the rotating shaft penetrates without removing the rotating shaft, and is excellent in workability. In the shaft hole of the housing through which the rotating shaft penetrates, such as various vehicles and agricultural machinery, where foreign matter may get caught and stick between the rotating shaft and the shaft hole when placed in a harsh usage environment. It is useful as a seal removing device and a seal removing method for removing the fitted shaft seal.

1 Seal removal device 10 Device body 10a One end of the device body ( closed base end )
10b The other end of the device body ( opened tip )
11 Space (inside the grip)
12 hole (female screw hole)
13 Opening part 14 Grip part 15 Biting part 16a Non-tapered part 16b Tapered part 17 Threaded part 18, 18a, 18b, 18c, 18d Notch groove 19, 19a, 19b, 19c, 19d, 19e, 19f, 19g, 19h Thread cutting blade part 20 First auxiliary member (rotation operation member)
30 Second auxiliary member (removal auxiliary member)
51 Housing 52a Shaft hole 53 Rotating shaft 53a End face 54 Shaft seal

Claims (4)

A seal removing device (1) for removing a shaft seal (54) fitted in a shaft hole portion (52a) of a housing (51) through which a rotating shaft (53) penetrates from the shaft hole portion.
A device body (10) having a cylindrical shape in which the base end is closed and the tip is open, and a space (11) for introducing the rotation axis is formed.
A grip portion (14) provided on the base end side of the apparatus main body so as to be grippable,
A substantially cylindrical biting portion (15) provided on the tip end side of the apparatus main body and inserted into the shaft hole portion is provided.
The grip portion (14) is anti-slip processed and
The biting portion is formed in a thread portion (17) protruding toward the inner peripheral wall surface of the shaft hole portion and a vertical notch groove (18a, 18b, 18c, 18d) intersecting the thread portion. It has a plurality of thread cutting edge portions (19) formed along the same .
On the other hand, the device main body is formed with a female screw hole portion (12) in the central axial direction that reaches the space from the closed base end.
A rotation operating member (20) having a protrusion (22) screwed to the female screw hole portion is detachably mounted on the end surface of the apparatus main body on the proximal end side.
When the rotation operation member is mounted on the device main body, the device main body having the rotation shaft introduced into the space is rotated by the rotation operation member in the screwing direction of the biting portion. Engage the biting part into the shaft seal so that it does not come off.
When the rotation operating member is detached from the main body of the device, the biting portion is engaged in the shaft sealing seal so as not to come off, and the female screw hole portion of the main body of the device assists the removal of the shaft sealing seal. It is characterized in that the shaft sealing seal is removed from the shaft hole portion by screw-coupling a bolt-shaped take-out auxiliary member (30) for screwing and screwing operation so as to abut against the rotating shaft. Seal removal device. The seal removing device according to claim 1, wherein the threaded portion of the biting portion has an outer surface tapered shape that gradually reduces in diameter toward the tip end side away from the grip portion. The shaft seal has a metal ring (54d) fitted to the shaft hole portion, and the threaded portion of the biting portion is threaded into the inner peripheral portion of the metal ring. The seal removing device according to claim 1 or 2, characterized in that it is possible. A seal removing method for removing a shaft seal (54) fitted in a shaft hole portion (52a) of a housing (51) through which a rotating shaft (53) penetrates from the shaft hole portion.
On the closed base end side of the cylindrical shape that forms the space (11) into which the rotation axis is introduced, a non-slip processed grip portion (14) and a female screw hole in the central axis direction that reaches the space from the base end. A thread portion (17) is formed and is inserted into the shaft hole portion, and a thread portion (17) protruding toward the inner peripheral wall surface of the shaft hole portion intersects with the thread portion. A device body (10) in which a substantially cylindrical bite portion (15) having a plurality of thread cutting edge portions (19) formed along a vertical notch groove (18a, 18b, 18c, 18d) is formed. ) And at the same time
A rotation operation member (20) having a protrusion (22) that is screw-coupled to the female screw hole portion and a bolt-shaped extraction assisting member (30) that can be screw-coupled to the female screw hole portion are prepared.
After introducing the rotating shaft into the space of the apparatus main body,
By rotating the main body of the device in the screwing direction of the biting portion by the rotation operating member, the biting portion is engaged with the shaft sealing seal in a retaining state.
Under the retaining state, the rotation operation member is detached from the female screw hole portion of the apparatus main body, and the bolt-shaped extraction assisting member (30) is screw-coupled to the female screw hole portion.
A seal removing method, characterized in that the shaft sealing seal is removed from the shaft hole portion by rotating the take-out assisting member in the screwing direction while abutting against the rotating shaft.

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