JP2017198268A - Grease application device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a grease application device which enables reduction of labor for grease application.SOLUTION: A grease application device 1 includes: a cylindrical contact part 10 which contacts with a bearing 30; and cylindrical grease supply parts 11 which are respectively provided at both axial sides of a rack shaft 20 in the contact part 10. Multiple grease supply paths 16 extending from a grease injection port 13 to an inner peripheral surface of the grease supply part 11 are provided in each grease supply part 11. Multiple air supply paths 17 extending from an air injection port 14 to an inner peripheral surface of the grease supply part 11 are provided in each grease supply part 11. The grease supply paths 16 and the air supply paths 17 extend between a plate 31 and a dish spring 32. The multiple air supply paths 17 are radially provided at regular intervals in a circumferential direction of the grease supply part 11.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a grease applying device.

  2. Description of the Related Art There is known an electric power steering device (EPS) that assists a driver's steering operation by applying motor power to a vehicle steering mechanism. For example, in the EPS of Patent Document 1, a motor is attached in parallel with a rack shaft, and a ball screw mechanism assists a driver's steering operation by converting the rotational motion of the motor into linear motion of the rack shaft. The ball screw mechanism has a nut screwed to the rack shaft via a plurality of balls. In order to rotatably support the nut relative to the housing, a bearing is disposed between the nut and the housing. Some bearings employ a so-called elastic support structure that is supported by a housing via a disc spring and plates provided on both axial sides thereof. When the disc spring is elastically deformed in the axial direction, the bearing moves in the axial direction with respect to the housing.

JP 2014-227047 A

  In such a bearing, grease is applied between the bearing and the disc spring and between the disc spring and the plate in order to suppress wear generated between the bearing, the disc spring, and the plate. The application of grease between the bearing and the disc spring and between the disc spring and the plate has been performed manually, for example. However, when applying grease manually, it is necessary to apply the grease after separating the bearing and the disc spring that are in contact with each other.

  Similar problems may occur if the bearing is provided not only on the EPS bearing but also on the rotating member of the vehicle. Moreover, the same problem may arise if it is not only a bearing but the rotation member of the vehicle which apply | coated grease in order to reduce sliding resistance.

  An object of the present invention is to provide a grease applying apparatus that reduces the labor of applying grease.

  The grease applying apparatus capable of achieving the above object surrounds the outer periphery of the first and second application objects adjacent to each other and in the direction in which the first application object and the second application object are arranged. In the cylindrical grease applicator installed so as to allow the movement of the first applicator within a certain range, the first applicator and the second applicator are provided radially when viewed from the axial direction of the grease applicator. A plurality of air supply passages for supplying air between the object and a radial direction when viewed from the axial direction of the grease application device, and between the first application object and the second application object And a plurality of grease supply passages for supplying grease. When viewed from a direction orthogonal to the axial direction of the grease application device, the air supply path and the grease supply path open into a space between the first application object and the second application object. The gaps between the first application object and the second application object are widened by the air supplied from the plurality of air supply paths, and the plurality of greases are disposed in the gaps. Grease is supplied through the supply path.

  According to this configuration, by supplying air between the first application object and the second application object through the plurality of air supply paths, the first application object and the second application object are The gap between is widened. Next, by supplying the grease between the first application object and the second application object through a plurality of grease supply paths, between the first application object and the second application object. Grease can be applied. For this reason, the operator who apply | coats grease should just install a grease application | coating apparatus so that the outer periphery of a 1st and 2nd application | coating object may be enclosed. Since the effort of expanding the space between the first application object and the second application object by the air supplied from the air supply path is also reduced, the grease is applied while maintaining the state where the gap is expanded. There is no need to do work. Therefore, the labor of applying grease is reduced.

In the grease application apparatus, it is preferable that the air supply path and the grease supply path are provided at equal intervals in the circumferential direction of the grease application apparatus.
According to this configuration, the air from the air supply path flows at an equal interval in the circumferential direction between the first application object and the second application object, and thus the first application object and the second application object. The gap between the coating object and the coating object is uniformly spread. Further, in a state in which the gap between the first application object and the second application object is expanded, the gap between the first application object and the second application object from the grease supply path. Grease is supplied. For this reason, grease is applied to the first application object and the second application object with little unevenness.

  In the above grease applying apparatus, the grease applying apparatus applies grease to the components of the steering device, and the steering device has a thread groove as the component and is a roller that reciprocates in the axial direction. A rudder shaft, a cylindrical nut screwed into the thread groove via a plurality of balls, a bearing provided so as to be swingable in an axial direction of the nut with respect to an outer peripheral surface of the nut, An elastic member provided on each side in the axial direction, and a plate provided adjacent to the elastic member, wherein the first application object is the plate, and the second application object is the elastic member. It is a member.

  In the above grease applying apparatus, the grease applying apparatus applies grease to the components of the steering device, and the steering device has a thread groove as the component and is a roller that reciprocates in the axial direction. A rudder shaft, a cylindrical nut screwed into the thread groove via a plurality of balls, a bearing provided so as to be swingable in an axial direction of the nut with respect to an outer peripheral surface of the nut, An elastic member provided on each side in the axial direction, and a plate provided adjacent to the elastic member, wherein the first application object is the bearing, and the second application object is the elastic member. It may be a member.

  According to these configurations, the grease is supplied from the grease supply path in a state where the gap between the bearing that is the first application object and the elastic member that is the second application object is expanded by the air supply path. The grease is applied to the bearing and the elastic member. Further, the grease is supplied from the grease supply path while the gap between the plate that is the first application object and the elastic member that is the second application object is expanded by the air supply path. Grease is applied to the elastic member.

  In the grease applying apparatus, it is preferable that an opening portion to the space between the bearing and the plate in the air supply path is provided to be inclined at a certain acute angle with respect to a side surface of the elastic member.

  According to this configuration, as the elastic member is pressed against the outer ring of the bearing by the air supplied from the air supply path, the elastic member is elastic in a state where the inclination is reduced from a state where the elastic member is inclined with respect to the steering shaft by a certain acute angle. Deform. This creates a gap between the elastic member and the plate.

  In the grease applying apparatus, when viewed from a direction orthogonal to the axial direction of the steered shaft, the air supply path is in a space between the elastic member and the plate in the axial direction of the steered shaft. An opening is preferred.

According to this configuration, since the air flows between the elastic member and the plate via the air supply path, the gap between the elastic member and the plate can be further increased.
In the grease applying apparatus, when viewed from a direction orthogonal to the axial direction of the steered shaft, the grease supply path is formed in a space between the elastic member and the plate in the axial direction of the steered shaft. An opening is preferred.

According to this configuration, the grease can be supplied to the gap between the elastic member and the plate by flowing in between the elastic member and the plate via the grease supply path.
In the grease applying apparatus, the center axis of the grease applying apparatus is supported on the floor by the support legs so as to be eccentric to the upper side in the gravitational direction than the central axes of the first application object and the second application object. Is preferred.

  According to this structure, it can suppress that the center axis | shaft of a 1st application | coating object and a 2nd application | coating object shifts | deviates to the gravity direction lower side from the center axis | shaft of a grease application | coating apparatus by gravity.

  According to the grease applying apparatus of the present invention, the labor of applying grease can be reduced.

The perspective view which shows schematic structure of a grease coating device. Sectional drawing which shows schematic sectional shape of a grease coating device. The end view which shows schematic structure of the grease coating device with which the ball screw mechanism was mounted | worn. (A)-(c) is the end elevation which expanded the periphery of the bearing of the ball screw mechanism with which the grease application apparatus was mounted | worn.

  Hereinafter, an embodiment of the grease applying apparatus will be described. Here, a specific description will be given of a grease application device that applies grease to an elastic support structure of a bearing, which is a constituent element of an EPS (electric power steering device).

  As shown in FIG. 1 and FIG. 2, the grease applying device 1 is applied so as to cover the ball screw mechanism of the EPS 2 that is the application target, thereby applying the grease to the target portion of the ball screw mechanism. The grease applicator 1 is attached in one stage of the EPS 2 manufacturing process. Note that the ball screw mechanism is not housed in a housing (not shown) when grease is applied to the ball screw mechanism.

  As shown in FIG. 3, the ball screw mechanism 22 includes a rack shaft 20 that moves in the axial direction based on the steering operation of the driver, and a cylindrical nut 24 that is screwed into the rack shaft 20 via a plurality of balls. ing. A spiral thread groove 20 a is provided on the outer peripheral surface of the rack shaft 20. A screw groove corresponding to the screw groove 20 a of the rack shaft 20 is provided on the inner peripheral surface of the nut 24. A spiral space surrounded by the thread groove of the nut 24 and the thread groove 20a of the rack shaft 20 functions as a rolling path on which the ball rolls.

  A driven pulley 25 is integrally attached to the outer periphery of the nut 24. The driven pulley 25 is a component of a belt reducer that transmits the rotation of the motor to the nut 24. The driven pulley 25 has pulley teeth 25a that mesh with belt teeth (not shown) of the belt that transmits the rotational force from the motor and a collar 25b that prevents the belt from shifting in the axial direction.

  A bearing 30 is provided on the outer peripheral surface of the nut 24. The bearing 30 employs an elastic support structure (floating structure). Specifically, annular plates 31 each having an L-shaped cross section are provided on both axial sides of the bearing 30. A disc spring 32 (elastic member) is provided between the plate 31 and the bearing 30. The outer edge of the disc spring 32 is close to the outer ring of the bearing 30, and the inner edge of the disc spring 32 is close to the plate 31. For this reason, when the ball screw mechanism 22 is accommodated in the housing, both side surfaces of the bearing 30 in the axial direction come into contact with the housing via the disc spring 32 and the plate 31, respectively. Since the disc spring 32 is elastically deformed in the axial direction, the bearing 30 is elastically supported with respect to the housing.

The grease applying device 1 applies grease between the bearing 30 and the disc spring 32 and between the plate 31 and the disc spring 32.
As shown in FIG. 2, the grease applying device 1 is divided into two parts in a direction orthogonal to the axial direction of the rack shaft 20, and these are combined to be attached to the ball screw mechanism.

  As shown in FIG. 3, the grease application device 1 includes a cylindrical contact portion 10 that contacts the outer peripheral surface of the bearing 30 and cylindrical grease that is provided on both sides in the axial direction of the rack shaft 20 in the contact portion 10. And a supply unit 11.

  The inner diameter of the contact portion 10 is set to be approximately the same as the outer diameter of the bearing 30. The inner diameter of the end 12 farthest from the bearing 30 in the grease supply unit 11 is smaller than the outer diameter of the nut 24 and larger than the outer diameter of the rack shaft 20. For this reason, the nut 24 and the bearing 30 of the ball screw mechanism 22 are covered with the grease applying device 1, and are hardly exposed both in the axial direction of the rack shaft 20 and in the direction orthogonal to the axial direction (see FIG. 1). . That is, there is almost no gap between the inner diameter of the end 12 of the grease supply unit 11 and the rack shaft 20. For this reason, it is difficult for the grease to leak from the inside of the grease applying apparatus 1 to the outside. Note that there is a gap between the plate 31 and the grease applying device 1 in the axial direction of the rack shaft 20. The gap moves between the bearing 30 and the plate 31 or moves between the plate 31 and the disc spring 32 as the plate 31 moves in the axial direction. That is, the movement of two application objects (for example, the plate 31 and the disc spring 32) in the alignment direction is allowed within a certain range (within this gap).

  A plurality of grease injection ports 13 are provided on the outer peripheral surface of the grease supply unit 11. The plurality of grease injection ports 13 are arranged side by side in the circumferential direction of the grease supply unit 11 (see FIG. 2). The grease injection port 13 has an inner diameter that increases toward the entrance. Thereby, supply to the inside of the grease supply part 11 of a smooth becomes smooth.

  A plurality of air inlets 14 are provided on the end surface of the contact portion 10 in the axial direction. The plurality of air inlets 14 are arranged side by side in the circumferential direction on the end surface in the axial direction of the contact portion 10. The air inlet 14 has an inner diameter that increases as it approaches the inlet.

  Between the contact part 10 and the grease supply part 11, the grease storage part 15 is provided. The grease storage unit 15 is connected to the grease injection port 13 and is a space in which the grease injected from the grease injection port 13 is temporarily stored. A plurality of grease injection ports 13 are connected to the grease storage unit 15. That is, the grease storage unit 15 is a space provided along the peripheral surface of the grease supply unit 11 between the contact unit 10 and the grease supply unit 11 (see FIG. 2). In the direction orthogonal to the axial direction of the rack shaft 20, the plurality of grease inlets 13 provided in the grease supply part 11 divided into two are provided in each of the divided contact parts 10 and grease supply parts 11. It is connected to the grease storage part 15 (refer FIG. 2).

  The contact portion 10 is provided with a plurality of grease supply paths 16 extending from the grease storage portion 15 toward the inner peripheral surface of the contact portion 10. The grease supply path 16 is open to the inner peripheral surface of the contact portion 10. The grease supply path 16 includes two grease supply paths 16 a and 16 b arranged in the axial direction with respect to one grease injection port 13 when viewed from a direction orthogonal to the axial direction of the rack shaft 20. One grease supply path 16 a extends between the plate 31 and the disc spring 32. The other grease supply path 16b extends between the plate 31 and the assist mechanism 21 (the ball screw mechanism 22 or the speed reducer 23). In other words, one grease supply path 16 a supplies grease from the outer peripheral side of the plate 31 and the disc spring 32, and the other grease supply path 16 b supplies grease from the inner peripheral side of the plate 31 and the disc spring 32. A plurality of these grease supply paths 16a and 16b are provided radially at equal intervals in the circumferential direction of the grease supply section 11 (see FIG. 2). The grease supplied from the grease supply paths 16 a and 16 b is filled in a space S provided between the bearing 30 and the plate 31 and between the plate 31 and the nut 24.

  The contact portion 10 is provided with a plurality of air supply paths 17 extending from the air inlet 14 to the inner peripheral surface of the grease supply portion 11. The air supply path 17 extends between the plate 31 and the disc spring 32. The air supply paths 17 are provided radially at equal intervals in the circumferential direction of the contact portion 10 (see FIG. 2). On the extension of the outlet portion of the air supply path 17, the inclined wall surface of the disc spring 32 is positioned in a state inclined by a certain angle (acute angle).

  By the way, the grease application device 1 mounted on the ball screw mechanism is supported on the floor by the support device 40. The support device 40 supports the contact portion 10 from the lower side in the gravity direction. In the state where the grease applying device 1 is held by the support device 40, the center axis of the abutting portion 10 is slightly eccentric with respect to the center axis of the rack shaft 20 in the gravity direction.

  The rack shaft 20 is supported by a support device 41. The support device 41 includes a clamp portion 41a that is attached by being tightened to the outer peripheral surface of the rack shaft 20, and a support leg 41b that is supported on the floor. The clamp portion 41a is provided to be slidable in the axial direction with respect to the upper surface of the support leg 41b. The clamp part 41a moves in the axial direction as the lever 42 is operated. The lever 42 is fixed by an air mechanical valve 43. That is, the clamp part 41a and the rack shaft 20 can be moved in the axial direction by operating the lever 42 after releasing the fixation of the lever 42 by the air mechanical valve 43. The operator operates the lever 42 so that the grease supply path 16 and the air supply path 17 are opened at corresponding positions between the plate 31 and the disc spring 32, and the ball screw mechanism 22 for the grease applying device 1. Can be adjusted.

Next, the grease application work by the grease application device 1 will be described.
As shown in FIG. 4A, even when the grease applying device 1 is attached to the ball screw mechanism 22, when no grease is injected from the grease inlet 13 and no air is injected from the air inlet 14, the space S is not filled with anything. In this case, there is almost no gap (or contact) between the plate 31 and the disc spring 32. The positions of the grease applying device 1 and the ball screw mechanism 22 are adjusted so that the grease supply path 16 and the air supply path 17 are positioned between the plate 31 and the disc spring 32 in the axial direction of the rack shaft 20. Yes.

  As shown in FIG. 4B, air A is injected (supplied) from an air supply device (not shown) into the air inlet 14. The air A injected into the air inlet 14 passes through the air supply path 17 and is supplied to the space S (more precisely, the space between the plate 31 and the disc spring 32). The air supply path 17 opens at a position corresponding to between the plate 31 and the disc spring 32. Since the air A is supplied between the plate 31 and the disc spring 32, forces in directions away from each other act on the plate 31 and the disc spring 32. However, since the disc spring 32 is in contact with the outer ring of the bearing 30, it cannot move in the axial direction (if there is a gap between the disc spring 32 and the bearing 30, it moves in the axial direction until it contacts the bearing 30). . On the other hand, the plate 31 moves in a direction away from the disc spring 32 because there is a gap (gap between the plate 31 and the grease applying device 1) on the side opposite to the disc spring 32. For this reason, the state where there is almost no gap between the inner edge of the disc spring 32 on the rack shaft 20 side and the plate 31 changes to a state where the gap between the plate 31 and the outer edge of the disc spring 32 is widened. . With the gap between the plate 31 and the disc spring 32 widened, the air supply device finishes injecting the air A into the air inlet 14.

  Next, as shown in FIG. 4C, the grease G is injected into the grease injection port 13 from a grease supply device (not shown). The grease G injected into the grease injection port 13 is stored in the grease storage unit 15. The grease G stored in the grease storage unit 15 is supplied to the space S through the grease supply paths 16a and 16b when the pressure exceeds a certain pressure. Precisely, the grease G is supplied to the portion between the plate 31 and the disc spring 32 in the space S through the grease supply path 16a. Further, the grease G is supplied to the portion between the plate 31 and the nut 24 in the space S through the grease supply path 16b. As a result, the grease G is applied to the portion facing the space S (the outer ring of the bearing 30, the plate 31, the disc spring 32, and the nut 24). In other words, the grease G is applied between two annular members arranged in the space S (for example, a portion between the plate 31 and the disc spring 32).

Further, the operator can apply the grease G in the space S by operating the lever 42 and moving the rack shaft 20 in the axial direction.
Next, the operation and effect of this embodiment will be described.

  In this embodiment, the operator can easily apply the grease G simply by attaching the grease applying device 1 to the ball screw mechanism 22. That is, in the state where the gap between the two application objects (for example, the plate 31 and the disc spring 32) is expanded by the air A supplied from the air supply path 17, the two application objects are passed through the grease supply path 16. By supplying the grease G between the objects, the grease G is applied to the ball screw mechanism 22 (application object). For this reason, an operator does not need to perform the operation | work which spreads the clearance gap between the plate 31 and the disk spring 32, or the operation | work which spreads the grease G, maintaining the state which pushed the said clearance gap expanded. Therefore, the labor of applying the grease G is reduced.

  Further, in the present embodiment, the grease supply passages 16a and 16b are provided in the grease supply unit 11 at equal intervals and radially in the circumferential direction, so that the grease G applied to the space S has less unevenness in the circumferential direction. It can be applied in a state. Further, by moving the position of the disc spring 32 with the air A, a portion with little gap (for example, a portion between the plate 31 and the disc spring 32) can be pushed and expanded. Can be applied more reliably to places where it is difficult to apply. In addition, since the air supply path 17 is also provided radially at equal intervals in the circumferential direction, the disc spring 32 can be moved uniformly in the axial direction. For this reason, it is suppressed that the disc spring 32 moves in the inclined state. A uniform gap is formed in the circumferential direction of the disc spring 32.

  By the way, in a state where the grease applying device 1 is supported by the support device 40, the central axis of the abutting portion 10 is positioned slightly above the gravity direction with respect to the central axis of the rack shaft 20. Thereby, it is possible to reduce the influence of the positional deviation of the ball screw mechanism 22 and the bearing 30 that are slightly shifted downward in the gravitational direction due to gravity.

In addition, you may change this embodiment as follows. The following other embodiments can be combined with each other within a technically consistent range.
-In this embodiment, although the grease storage part 15 was provided in the grease application apparatus 1, it is not necessary to provide this. In this case, the grease G injected from the grease injection port 13 is directly supplied to the space S via the grease supply path 16.

In the present embodiment, the grease supply paths 16a and 16b are provided, but only one of them may be provided. Even in this case, the grease G can be supplied to the space S.
In the present embodiment, the central axis of the abutment portion 10 held by the support device 40 is provided at a position slightly decentered upward in the gravitational direction with respect to the central axis of the rack shaft 20, but is not limited thereto. For example, the central axis of the contact portion 10 and the central axis of the rack shaft 20 may be provided coaxially.

  -The operator operates the lever 42 to eliminate the gap between the one plate 31 and the grease applying device 1, and to provide the gap between the other plate 31 and the grease applying device 1, thereby providing a gap. Air A may be supplied to the gap between the plate 31 on the other side and the disc spring 32.

  -In this embodiment, when supplying the grease G from the grease supply path 16, supply of the air A from the air supply path 17 was stopped, but it is not restricted to this. For example, the supply of the air A from the air supply path 17 may be continued even when the grease G is supplied from the grease supply path 16.

  -In this embodiment, although the grease supply path 16 and the air supply path 17 were provided so that it might extend between the plate 31 and the disk spring 32, it is not restricted to this. For example, it may be provided so as to extend between the bearing 30 and the plate 31. In this case, when the air A is supplied between the bearing 30 and the plate 31, the plate 31 is separated from the bearing 30. Then, the grease G is supplied to the gap between the bearing 30 and the plate 31 in the space S.

  -In this embodiment, although the clearance gap was provided between the plate 31 and the grease coating device 1 in the axial direction of the rack shaft 20, it does not need to provide. Even in this case, the gap between the plate 31 and the disc spring 32 can be widened. That is, when air A flows between the plate 31 and the disc spring 32, the disc spring 32 attempts to move toward the bearing 30. This movement causes the disc spring 32 to abut on the bearing 30 (the outer ring). Regulated by As the disc spring 32 is pressed against the bearing 30 by the pressure of the air A, the disc spring 32 is elastically deformed in such a manner that the inclination with respect to the direction orthogonal to the rack shaft 20 becomes smaller (broken line in FIG. 4B). Then, the grease G is supplied to the gap between the bearing 30 and the plate 31 in the space S.

  -In this embodiment, the plate 31 was provided in the axial direction both sides of the bearing 30, and the disc spring 32 was each provided between the plate 31 and the bearing 30, but it is not restricted to this. For example, the disc spring 32 may be provided on both axial sides of the bearing 30, and the plate 31 may be provided between the disc spring 32 and the bearing 30.

  In the present embodiment, the grease application device 1 that applies grease between the plate 31 and the disc spring 32 is embodied, but the present invention is not limited thereto. For example, the grease applicator 1 may be used to apply grease to a bearing provided on the rotating member of the EPS 2, or may be used in a rotating member or an axial direction that needs to apply grease to reduce sliding resistance. It may be used for applying grease to the moving sliding member. That is, what is necessary is just the grease application | coating apparatus which apply | coats grease between two application | coating objects.

  DESCRIPTION OF SYMBOLS 1 ... Grease application apparatus, 2 ... EPS, 10 ... Contact part, 11 ... Grease supply part, 12 ... End part, 13 ... Grease injection port, 14 ... Air injection port, 15 ... Grease storage part, 16, 16a, 16b DESCRIPTION OF SYMBOLS ... Grease supply path, 17 ... Air supply path, 20 ... Rack shaft (steering shaft), 20a ... Screw groove, 21 ... Assist mechanism, 22 ... Ball screw mechanism, 23 ... Reduction gear, 24 ... Nut, 25 ... Drive pulley , 25a ... pulley teeth, 30 ... bearing (application object), 31 ... plate (application object), 32 ... disc spring (application object, elastic member), 40, 41 ... support device, 41a ... clamp part, 41b ... support leg, 42 ... lever, 43 ... air mechanical valve, A ... air, G ... grease, S ... space.

Claims (8)

To surround the outer periphery of the first and second application objects adjacent to each other and to allow movement of the first application object and the second application object in the arrangement direction within a certain range. In the installed cylindrical grease applicator,
A plurality of air supply paths that are provided in a radial pattern when viewed from the axial direction of the grease applying device and supply air between the first application object and the second application object;
A plurality of grease supply paths that are provided in a radial pattern when viewed from the axial direction of the grease application device and supply grease between the first application object and the second application object;
When viewed from a direction orthogonal to the axial direction of the grease application device, the air supply path and the grease supply path open into a space between the first application object and the second application object. And
With the air supplied from the plurality of air supply paths, the gap between the first application object and the second application object is widened, and the plurality of grease supply paths are inserted into the gaps. A grease applying device to which grease is supplied via. In the grease application apparatus of Claim 1,
The said air supply path and the said grease supply path are grease application apparatuses provided in the circumferential direction of the said grease application apparatus at equal intervals. In the grease application apparatus according to claim 1 or 2,
The grease application device applies grease to the components of the steering device,
The steering device is, as the component,
A steering shaft having a thread groove and reciprocating in the axial direction;
A cylindrical nut screwed into the thread groove via a plurality of balls;
A bearing provided so as to be swingable in an axial direction of the nut with respect to an outer peripheral surface of the nut;
Elastic members respectively provided on both sides in the axial direction of the bearing;
A plate provided adjacent to the elastic member,
The grease application apparatus, wherein the first application object is the plate, and the second application object is the elastic member. In the grease application apparatus according to claim 1 or 2,
The grease application device applies grease to the components of the steering device,
The steering device is, as the component,
A steering shaft having a thread groove and reciprocating in the axial direction;
A cylindrical nut screwed into the thread groove via a plurality of balls;
A bearing provided so as to be swingable in an axial direction of the nut with respect to an outer peripheral surface of the nut;
Elastic members respectively provided on both sides in the axial direction of the bearing;
A plate provided adjacent to the elastic member,
The grease application apparatus, wherein the first application object is the bearing, and the second application object is the elastic member. In the grease application apparatus of Claim 3 or 4,
When viewed from the direction orthogonal to the axial direction of the steered shaft,
The grease application apparatus in which an opening portion to the space between the bearing and the plate in the air supply path is inclined with respect to a side surface of the elastic member by a certain acute angle. In the grease application apparatus as described in any one of Claims 3-5,
When viewed from the direction orthogonal to the axial direction of the steered shaft,
The grease supply device, wherein the air supply path is open to a space between the elastic member and the plate in the axial direction of the steered shaft. In the grease application apparatus as described in any one of Claims 3-5,
When viewed from the direction orthogonal to the axial direction of the steered shaft,
The grease supply device is a grease application device that opens in a space between the elastic member and the plate in the axial direction of the steered shaft.   The grease coating apparatus according to any one of claims 1 to 7, wherein the center axis thereof is supported so as to be eccentric to the upper side in the gravity direction than the center axes of the first application object and the second application object. A grease applicator supported on the floor by legs.