JP6313050B2 - Claw clutch - Google Patents

Description

  The present invention relates to a claw clutch, and more particularly to a claw clutch installed in a rotary drive system such as a metal sheet roll forming machine.

Conventionally, a plurality of forming stands are arranged in tandem on a metal sheet roll forming line, and a main roll and a side roll are incorporated in each forming stand.
For example, the roll forming line is composed of 25 to 30-stage forming stands, and the 25 to 30-stage forming stands are divided into four cassettes each consisting of 7 to 8 stages of forming stands.
A forming stand (four cassettes) is prepared for each shape of a roll molded product (for example, various steel floorboards). When molding different roll molded products, these four cassettes are referred to as “quick change”. Are exchanged using a dedicated device called "" (so-called "set change" is performed). At this time, the coupling between the driven shaft connected to each molding stand (cassette side) and the drive shaft on the drive motor side is a meshing clutch system called “claw clutch”.

The claw clutch has a structure in which the unevenness formed on the end surface of the driven-side member meshes with the unevenness formed on the end surface of the driven-side member, and the side surface forming each unevenness (hereinafter referred to as the “engagement surface”). ) Was radial to the rotational axis (located in the plane containing the rotational axis) and perpendicular to the rotational direction. Further, for the purpose of facilitating the engagement of the engagement surfaces, “play (clearance)” is provided between the engagement surface on the driven shaft side and the engagement surface on the drive shaft side. That is, the opening angle formed by the both side surfaces of the convex portion with respect to the rotation axis is smaller than the opening angle formed by the both side surfaces of the convex portion with respect to the rotation axis.
In roll forming in actual production, the speed of the molding line (corresponding to the running speed of the molded product) is changed depending on the length of the molded product. When struck, the mating surface wears and deforms. Therefore, since the connection of the pawl clutch (engagement of the meshing surfaces) is easily disengaged, an invention for solving this problem has been disclosed (for example, see Patent Documents 1 to 3).

Microfilm of Japanese Utility Model No. 58-158602 (Japanese Utility Model Application No. 60-65423) JP-A-5-49307 (page 4-5, FIG. 15) JP-A-9-176935 (page 2-3, FIG. 4)

The invention disclosed in Patent Document 1 is provided with a locking engagement groove inclined with respect to the rotational direction on the meshing surface on the driven shaft side, while being inclined with respect to the rotational direction on the meshing surface on the drive shaft side. The locking projection is retracted in the rotational direction as the locking engagement groove becomes closer to the driven shaft (away from the drive side), while the locking projection is driven. The closer to the shaft side (the farther away from the drive side), the more it advances in the direction of rotation. Therefore, when the engagement surface on the drive shaft side abuts on the engagement surface on the driven shaft side to transmit the rotational force, the locking projection is pushed into the back of the locking engagement groove (on the driven shaft side). The coupling of the claw clutch (engagement of the meshing surfaces) is difficult to come off.
The inventions disclosed in Patent Documents 2 and 3 are such that the entire engagement surface on the driven shaft side and the entire engagement surface on the drive shaft side are inclined, and the invention disclosed in Patent Document 1 is disclosed. This corresponds to a structure in which the engaging groove and the engaging protrusion are provided on the entire engaging surface.

As described above, in the inventions disclosed in Patent Documents 1 to 3, it is difficult to disengage the claw clutch (engagement of the meshing surface), but it does not prevent wear or deformation on the meshing surface. For this reason, when wear and deformation on the meshing surface proceed, the engagement of the pawl clutch (meshing of the meshing surface) is likely to be released.
For this reason, it is necessary to repair the meshing surface by welding repair or the like every time, and there is a problem that the repair cost increases.

  An object of the present invention is to solve the above-mentioned problem, and to provide a pawl clutch that can suppress an increase in repair cost even when wear and deformation on the meshing surface progress and can quickly reduce the repair time. And

(1) The pawl clutch according to the present invention has a drive side member installed on the drive shaft and a driven side member installed on the driven shaft,
The drive-side member includes a drive-side main body attached to the drive shaft, a drive-side end surface formed on the drive-side main body and perpendicular to the rotation shaft, and a drive-side piece detachably installed on the drive-side end surface Comprising
The driven-side member includes a driven-side main body attached to the driven shaft, a driven-side end surface formed on the driven-side main body and perpendicular to the rotating shaft, and a driven-side piece detachably installed on the driven-side end surface. Comprising
The drive side piece includes a drive side piece main body portion detachably installed on the drive side end face, and a drive side piece exchange portion detachably installed on the drive side piece main body portion, and the drive side piece A side surface on the rotation direction side is formed in the piece exchange part,
The driven-side piece includes a driven-side piece main body that is detachably installed on the driven-side end surface, and a driven-side piece replacement that is detachably installed on the driven-side piece main body. The side of the counter rotation direction side is formed in the piece exchange part,
A side surface on the rotation direction side of the driving piece is in contact with a side surface on the counter rotation direction side of the driven piece.

(2) In (1), the drive side end face and the drive side piece are prevented from moving relative to each other by a drive side key installed in a drive side key groove formed on each of them.
The driven side end face and the driven side piece are prevented from moving relative to each other by a driven side key provided in a driven side keyway formed on each of them.
(3) pre-SL (2), the driving-side key groove width of the mouth is narrower than the width of the back, the drive-side key is narrower than the width of the end portion width of the central portion, the driving-side key groove When the driving side key is installed, the driving piece cannot be pulled out from the driving side end face in a direction perpendicular to the driving side end face.
When the driven key groove is narrower at the mouth than at the back, the driven key is narrower at the center than at the end, and the driven key is installed in the driven key groove. The driven piece cannot be removed from the driven side end face in a direction perpendicular to the driven side end face.

(4) In (1), a driving side end surface recess into which a part of the driving side piece is allowed to enter is formed on the driving side end surface, and the driving side piece is partially intruded into the driving side end surface recess. Movement is prevented,
A driven-side end surface recess into which a part of the driven-side piece can enter is formed in the driven-side end surface, and a relative movement is prevented by a part of the driven-side piece entering the driven-side end surface recess. It is characterized by.
(5) In (4), the drive-side end surface recess has a narrower mouth than the back, and the drive-side piece has a width at a predetermined distance from one end surface than the width of the one end surface. When the part close to the one end surface of the driving side piece enters the recessed portion on the driving side end surface, the driving side piece cannot come out from the driving side end surface in a direction perpendicular to the driving side end surface. so,
The driven-side end surface recess has a narrower width at the mouth than the back, and the driven-side piece has a width at a predetermined distance from one end surface that is narrower than the width of the one end surface. When a portion close to the one end face of the driven piece enters, the driven piece cannot be pulled out from the driven end face in a direction perpendicular to the driven end face.
(6) In any one of the above (1) to (5), the side surface on the rotation direction side of the driving piece is relative to the driving side end surface so as to protrude toward the rotation direction side as the distance from the driving side end surface increases. The side surface on the counter-rotation direction side of the driven-side piece is inclined with respect to the driven-side end surface so as to protrude in the counter-rotation direction as the distance from the driven-side end surface increases.

( 7 ) In the above (6), the drive side piece (20) includes a plurality of drive side pieces (21) parallel to the drive side end face (11), and the drive side piece (20 ) On the rotation direction side of the drive side piece (21) and the drive side piece end face (21) intersecting the drive side piece (22) and the drive side piece end face (21) on the opposite side of the drive side piece (20). The ridge line (A1) on the counter-rotation direction side where the drive-side clearance surface (23) which is a side surface and the drive-side piece end surface (21) intersect each has a sector shape positioned in the radial direction including the rotation axis (O),
Adjacent to the first driving side piece (20a) and the ridge line (B1) on the rotational direction side of the first driving side piece (20a), which is one of the plurality of driving side pieces (20). The driving side opening angle (φ2) formed by the ridge line (A2) on the counter-rotating direction side of the second driving side piece (20b) to be made with respect to the rotation axis (O) is the first driving side piece (20a). The driving-side opening angle difference (Δφ) is larger than the driving-side opening angle (φ1) formed by the ridge line (B1) on the rotation direction side and the ridge line (A1) on the counter-rotation direction side with respect to the rotation axis (O). ,
A clearance (R · tan (Δφ)) obtained by multiplying the radius of curvature (R) on the inner peripheral side of the first driving side piece (20a) by the tangent (tan) of the driving side opening angle difference (Δφ) ( S) is the normal of the drive side end surface (22a) of the drive surface (22a) to the frame height (H) which is the distance between the drive side end surface (11) and the drive side piece end surface (21a). Larger than the protrusion amount (T) which is a product (H · tan (θ)) multiplied by the tangent (tan (θ)) of the inclination angle (θ) inclined with respect to the
The driven piece (80) includes a plurality of driven piece pieces (81) parallel to the driven piece end face (91), and the driven piece (80) is a side surface on the counter-rotating direction side. A ridge line (B8) on the rotation direction side where a certain driven surface (82) and the driven side piece end surface (81) intersect, and a driven side clearance surface (83) which is a side surface on the rotation direction side of the driven side piece (80). ) And the ridge line (A8) on the counter-rotation direction side where the driven-side piece end surface (81) intersects each presents a sector shape located in the radial direction including the rotation axis (O),
Adjacent to the first driven side piece (80a) and the ridge line (A8) on the rotation direction side of the first driven side piece (80a), which is one of the driven side pieces (80). The driven side trough angle (φ2) formed by the ridge line on the counter-rotation direction side of the second driven piece to be rotated with respect to the rotation axis (O) is the rotation direction side of the first driven piece (80a). The driven side opening angle difference (Δφ) is larger than the driven side mountain opening angle (φ1) formed by the ridge line (A8) and the anti-rotation direction side ridge line (B8) with respect to the rotation axis (O),
A clearance (R · tan (Δφ)) obtained by multiplying the radius of curvature (R) on the inner peripheral side of the first driven side piece (80a) by the tangent (tan) of the driven side opening angle difference (Δφ) ( S) is the normal of the driven side end surface (91) of the driven surface (82) to the piece height (H) which is the distance between the driven side end surface (91) and the driven side piece end surface (81). The protrusion amount (T), which is a product (H · tan (θ)) obtained by multiplying the tangent (tan) of the inclination angle (θ) with respect to the inclination, is characterized by being larger.

  (I) The claw clutch according to the present invention is "detachable" in which the side surface on the rotational direction side of the drive-side piece that is detachably installed contacts the side surface on the counter-rotation direction side of the driven-side piece. Therefore, if a spare drive-side piece and a driven-side piece are prepared and prepared in advance, when the drive-side piece and the driven-side piece are worn or deformed, the drive-side piece and the driven-side piece are replaced. Just do it. Therefore, it is not necessary to repair by welding repair or the like, so that the repair cost can be reduced and the repair time can be shortened.

(Ii) The driving side end face and the driving side piece are transmitted with rotational force by the driving side key groove / driving side key mechanism, and the driven side end face and the driven side piece are driven side key groove / driven side key mechanism. Rotational force is transmitted by. Therefore, for example, when the drive-side piece is attached to the drive-side end surface with a bolt and when the driven-side piece is attached to the driven-side end surface with a bolt, the shearing force acting on the bolt can be eliminated.
(Iii) Further, the driving side keyway / driving side key mechanism is such that the driving side key cannot be removed from the driving side keyway in a direction parallel to the rotation axis, and the driven side keyway / driven side key mechanism is a driven side key. Since the driven key cannot be pulled out from the groove in the direction parallel to the rotation axis, the drive side piece is prevented from lifting from the drive side end surface (relative movement in the direction of the rotation axis), and the driven side piece is driven. Lifting from the end face (relative movement in the direction of the rotation axis) is more reliably prevented.

(Iv) Further, when a part of the driving side piece enters the driving side end surface recess, the relative movement between the driving side end surface and the driving side piece is surely prevented, and the driven side end surface concave portion of the driven side piece is prevented. The partial intrusion reliably prevents relative movement between the driven side end face and the driven side piece.
(V) Further, in (4), the drive-side piece cannot be pulled out from the drive-side end surface, and the driven-side piece cannot be pulled out from the driven-side end surface. (Relative movement in the direction) is prevented, and the lift of the driven piece from the driven end face (relative movement in the direction of the rotation axis) is more reliably prevented.

(Vi) Since the driving side piece includes a driving side piece main body and a driving side piece replacement part, and the driven side piece includes a driven side piece main body part and a driven side piece replacement part, wear and deformation occur. The place is the side surface on the rotation direction side of the drive side piece replacement portion and the side surface on the counter rotation direction side of the driven side piece replacement portion. Therefore, if a small drive-side piece replacement portion and a driven-side piece replacement portion are prepared and prepared in advance, the side surface on the rotation direction side of the drive-side piece replacement portion or the counter-rotation direction side of the driven-side piece replacement portion is prepared. When wear or deformation occurs on the side surface, it is only necessary to replace the drive side piece replacement part or the driven side piece exchange part. Therefore, since it is only necessary to prepare an inexpensive driving side piece replacement unit and driven side piece replacement unit, it is possible to reduce maintenance costs associated with equipment inventory.
(Vii) Further, the side surface on the rotation direction side of the driving side piece and the side surface on the counter-rotation direction side of the driven side piece are inclined with respect to a plane perpendicular to the rotation axis, and are urged in the direction of meshing with each other during rotation. Therefore, it is difficult to disengage the hook clutch (engagement of the meshing surfaces).

The front view which shows the use condition explaining the nail | claw clutch which concerns on embodiment of this invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 illustrates a pawl clutch according to an embodiment of the present invention, wherein (a) is a right side view showing a driving side member, and (b) is a left side view showing a driven side member. The front view which shows the part explaining the type 1 of the attachment / detachment mechanism in the nail | claw clutch which concerns on embodiment of this invention. The front view which shows the part explaining the type 2 of the attachment or detachment mechanism in the claw clutch which concerns on embodiment of this invention. The front view which shows the part explaining the type 3 of the attachment or detachment mechanism in the nail | claw clutch which concerns on embodiment of this invention. The front view which shows the part explaining the type 4 of the attachment or detachment mechanism in the nail | claw clutch which concerns on embodiment of this invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram for explaining a relationship between a clearance (clearance) when a claw clutch according to an embodiment of the present invention is engaged and an inclination angle of a driving surface, (a) is a plan view showing a driving side member; FIG. 4 is a side development view in which the inner periphery of the drive side piece of the drive side member is developed on a plane and the driven side piece of the driven side member is additionally written.

[Embodiment 1]
1 and 2 are diagrams for explaining a claw clutch according to an embodiment of the present invention. FIG. 1 is a front view showing a use state, and FIG. 2 (a) is a right side view showing a drive side member. FIG. 2B is a left side view showing the driven member. Each figure is shown schematically and has an exaggerated portion. Moreover, in each figure shown below (FIGS. 3-7), the same code | symbol is attached | subjected to the part which is the same as the part shown in FIG. 1 and FIG. 2, or a corresponding part, and a part of description is abbreviate | omitted.

(Nail clutch)
1 and 2 (a) and 2 (b), the pawl clutch 100 has a drive side member 110 installed on the drive shaft 1 and a driven side member 190 installed on the driven shaft 9, and is driven. The rotation of the shaft 1 in one direction of rotation (indicated by “arrow” in the figure) is transmitted to the driven shaft 9. At this time, the rotation shafts of the drive shaft 1, the drive side member 110, the driven shaft 9, and the driven side member 190 (hereinafter referred to as “rotation shaft 200”) coincide with each other.
The drive shaft 1 and the drive-side member 110, and the driven shaft 9 and the driven-side member 190 are each formed with a key groove, and are firmly fixed to each other by driving a corresponding key (illustrated). do not do).
The drive-side member 110 is installed on the drive shaft 1 and has a drive-side body 10 having a drive-side end surface 11 perpendicular to the rotation shaft 200, and a drive-side piece detachably installed on the drive-side end surface 11 (“ 20a, 20b, 20c) and a conical guide protrusion 111 for facilitating centering of the driven side member 190.
The drive-side pieces 20a, 20b, and 20c are arranged equiangularly, the drive-side trough 12a is between the drive-side piece 20a and the drive-side piece 20b, and the drive-side piece 20b is driven between the drive-side piece 20c and the drive-side piece 20c. A driving trough 12c is formed between the driving trough 12c and the driving trough 20a (referred to as a “valley” in the figure).

The driven-side member 190 is installed on the driven shaft 9 and has a driven-side main body 90 having a driven-side end surface 91 perpendicular to the rotation shaft 200, and a driven-side piece detachably installed on the driven-side end surface 91 (" 80a, 80b, 80c) and a guide hole 191 into which the guide protrusion 111 enters.
Similarly, the driven side piece 80a, 80b, 80c are isometric arranged, driven valley 92 b is provided between the driven-side frame 80a and the driven side piece 80b is driven piece 80b and the driven-side frame 80c between the driven side valley 92 c is driven trough 92 a between the driven side piece 80c and the driven piece 80a is formed respectively.

The drive-side pieces 20a, 20b, and 20c can enter the driven-side valleys 92a, 92b, and 92c, respectively, and the driven-side pieces 80a, 80b, and 80c can enter the drive-side valleys 12a, 12b, and 12c, respectively. .
Since the driving side pieces 20a, 20b, 20c and the driven side pieces 80a, 80b, 80c are all in the same form, hereinafter, the same contents will be described with reference to the small numbers “a, b, c” attached to the reference numerals. "Is omitted. In addition, only the driving side piece 20 will be described, and description of the driven side piece 80 may be omitted. Further, the guide protrusion 111 and the guide hole 191 for facilitating center alignment may be provided on the driven side and the guide hole 191 on the drive side.

The drive-side piece 20 includes a drive-side piece end surface 21 parallel to the drive-side end surface 11, a rotation-direction side surface (hereinafter referred to as “drive surface”) 22, and a counter-rotation-direction side surface (hereinafter “drive-side clearance surface”). 23).
The drive surface 22 is inclined (tapered) with respect to the drive side end surface 11 so as to protrude in the rotational direction as the distance from the drive side end surface 11 increases. The ridge line intersecting the end face 21 protrudes “5 mm” in the rotation direction from the corner where the drive face 22 intersects the drive side end face 11 (hereinafter, the protruded amount is referred to as “projection amount”).
Further, the driving side clearance surface 23 is perpendicular to the driving side end surface 11. Note that an opening angle (hereinafter referred to as “driving side mountain opening angle”) formed by the ridge line where the driving surface 22 intersects the driving side piece end surface 21 and the ridge line where the driving side clearance surface 23 intersects the driving side piece end surface 21 with respect to the rotation shaft 200. “)” Is “55 °”.

Similarly, the driven piece 80 has a driven piece end surface 81 parallel to the driven side end surface 91, a side surface on the counter-rotating direction side (hereinafter referred to as “driven surface”) 82, and a side surface on the rotating direction side (hereinafter referred to as “driven side”). 83) (referred to as “gap surface”).
The driven surface 82 is inclined (tapered) with respect to the driven side end surface 91 so as to protrude in the rotational direction as the distance from the driven side end surface 91 increases. The ridge line intersecting the end surface 81 protrudes “5 mm” in the rotational direction from the corner where the driven surface 82 intersects the driven-side piece end surface 81. That is, when the driving surface 22 abuts (engages) the driven surface 82, the driving surface 22 is biased in the direction of meshing with each other, so that the coupling of the pawl clutch 100 (engagement between the driving surface 22 and the driven surface 82) is released. It has become difficult.
Further, the driven side clearance surface 83 is perpendicular to the driven side end surface 91. It should be noted that the ridgeline at which the driven-side piece end surface 81 and the driven surface 82 intersect and the ridgeline at which the driven-side piece end surface 81 and the driven-side clearance surface 83 have a tolerance are defined with respect to the rotation shaft 200 (hereinafter referred to as “driven”). "Side valley opening angle") is "65 °".

FIG. 7 is a view for explaining the relationship between the clearance (clearance) when the pawl clutch according to the embodiment of the present invention is engaged and the inclination angle of the drive surface, and (a) is a plan view showing the drive side member 110. (B) adds the driven side piece 80a (refer FIG. 2) of the driven side member 190 to what developed the plane view in the inner periphery of the driving side piece 20 of the driving side member 110 in the plane. Hereinafter, for convenience of explanation, the driving side piece 20a is referred to as a first driving side piece 20a, and the driving side piece 20b is referred to as a second driving side piece 20b.
7A and 7B, the clearance (clearance) S between the driving side piece 20 and the driven side piece 80 and the driving when the driving side member 110 and the driven side member 190 are engaged with each other. The relationship between the inclination angle θ of the surface 22 with respect to the normal line of the driving side end surface 11 will be described.

7A and 7B, the radius of curvature of the inner periphery of the first drive side piece 20a is assumed to be “R”, and the following description will be made on a cylindrical surface having the radius of curvature R.
The distance between the drive-side end face 11 of the first drive-side piece 20a and the drive-side piece end face 21a parallel to this is defined as a piece height “H”, and the drive-side clearance surface 23a and the drive-side piece in the first drive-side piece 20a. The position of the curvature radius R of the ridge line intersecting the end surface 21a on the cylindrical surface is “A1”, and the curvature radius R of the ridge line of the first drive side piece 20a intersecting the drive surface 22a and the drive side piece end face 21a is A position on the cylindrical surface is “B1”, and an angle formed by the position A1 and the position B1 with respect to the rotation axis O is a driving side mountain opening angle “φ1”.
Further, the angle formed by the drive surface 22a and the normal line of the drive side end surface 11a is the inclination angle θ, and the position (C1) of the line (corner) where the drive surface 22a intersects the drive side end surface 11 is on the cylindrical surface with the radius of curvature R. Then, the position on the cylindrical surface of the radius of curvature R of the line (corner) where the driving side clearance surface 23a intersects the driving side end surface 11 is defined as “D1”.
Since the second drive side piece 20b is the same as the first drive side piece 20a, the subscript of the reference numeral indicating the position or the like is set to “2”, and the driven side piece 80a of the driven side member 190 is the first drive side. Since it is the same as the side piece 20a, the subscript of the code indicating the position or the like is set to “8”.
The angle formed by the position B1 of the first drive side piece 20a and the position A2 of the second drive side piece 20b with respect to the rotation axis O is defined as a drive side valley opening angle “φ 2 ”.

Then, the length X of the ridge line (distance between the position A1 and the position B1) where the driving-side piece end surface 21a of the first driving-side piece 20a intersects the cylindrical surface with the radius of curvature R is “2π · R · (φ1 / 360) " Further, the distance Y on the cylindrical surface of the radius of curvature R between the position B1 of the first driving side piece 20a and the position A2 of the second driving side piece 20b is “2π · R · (φ2 / 360)”.
Accordingly, when the driving side member 110 and the driven side member 190 are engaged with each other, the gap S between the position B1 of the first driving side piece 20a and the position B8 of the driven side piece 80a is “Y−X”, that is, “2π · R · (φ2−φ1) / 360 ”, so that the difference between the driving side valley opening angle φ2 and the driving side mountain opening angle φ1 is the driving side opening angle difference Δφ (= φ2−φ1),“ S = R · tan (Δφ) ”.
On the other hand, the protrusion amount T of the drive surface 22a is “H · tan (θ)”.

When the driving-side piece end surface 21 and the driven-side piece end surface 81 are located on the same plane, the clearance (clearance) S formed between the driving surface 22 and the driven surface 82 is larger than the protruding amount T. ing. That is, since “S>T> 0”, the setting is such that “R · tan (Δφ)> H · tan (θ)> 0”.
This is because the drive-side member 110 is easily meshed with the drive-side member 190, and at the same time, when the clearance S is numerically fixed, if the protrusion amount T is greater than or equal to the clearance S, that is, the inclination angle θ is increased, the first drive is performed. This is because the ridgeline (B1) of the side piece 20a has an acute angle, so that the possibility that the wear resistance, the durability, and the like are reduced is increased.
Note that the driving side mountain opening angle and the driven side mountain opening angle are the same value (φ1), and the driven side valley opening angle and the driving side valley opening angle are the same value (φ2). Is the same value (Δφ) as the “driven side opening angle difference” that is the difference between the driven side valley opening angle and the driven side mountain opening angle. .

In the present invention, the thickness of the driving side piece 20 (same as the distance between the driving side end face 11 and the driving side piece end face 21) and the thickness of the driven side piece 80 (the driven side end face 91 and the driven side piece end face 81) Is the same as the distance) and “25 mm”, the protruding amount “5 mm” and the opening angle are “55 ° and 65 °”, but the present invention is not limited to this. As described above, it is only necessary that the driving-side piece 20 can enter the driven-side trough 92 and the driven-side piece 80 can respectively enter the driving-side trough 12.
Further, in order to improve the wear resistance of the driving surface 22 and the driven surface 82, for example, hard chrome plating may be applied to the surfaces (meshing surfaces) to reduce the frictional resistance, or metal spraying (such as titanium coating). ) To increase the surface hardness. If it does so, the lifetime as a member will be extended.

3-6 is a front view which shows the part explaining the attachment / detachment mechanism in the nail | claw clutch which concerns on embodiment of this invention, Comprising: FIG. 3 is Type 1, FIG. 4 is Type 2, FIG. FIG. 6 is type 4.
Next, with reference to FIGS. 3 to 6, a mechanism for detachably installing the drive-side piece 20 on the drive-side end surface 11 (hereinafter referred to as “detachment mechanism”) will be described, and the driven-side piece 80 will be referred to as a driven-side end surface. The mechanism that is detachably installed on 91 is the same as the attachment / detachment mechanism, and a description thereof will be omitted.

(Type 1)
In FIG. 3, the type 1 attachment / detachment mechanism uses a bolt / screw hole and a keyway / key.
The drive-side piece 20 has a through hole 24 (a seat (corner portion) is formed on the drive-side piece end surface 21) and a surface opposite to the drive-side piece end surface 21 (a surface that contacts the drive-side end surface 11). ), A drive-side keyway 25 that is rectangular in a front view is formed.
On the other hand, the drive side end face 11 is formed with a screw hole 14 in which a female screw is formed and a drive side key groove 15 having a rectangular shape when viewed from the front.
The bolt 30 penetrates the through hole 24 and enters the screw hole 14 and is screwed into the female screw. In addition, the drive side key 40 is installed across the drive side key groove 25 and the drive side key groove 15.

Therefore, when wear or deformation occurs on the drive surface 22, the drive-side piece 20 in use can be removed and a new drive-side piece 20 prepared can be installed simply by removing and attaching the bolt 30. At this time, for example, only the drive-side piece 20a may be replaced, and the drive-side pieces 20b and 20c may be used continuously (see FIG. 2A). Therefore, it becomes unnecessary to repair by welding repair etc., repair cost can be held down, and repair time can be shortened.
Further, the rotational force is transmitted by the mechanism of the drive side key grooves 15 and 25 and the drive side key 40, and the relative movement (displacement) between the drive side main body 10 and the drive side piece 20 is surely prevented. The shearing force acting on the bolt 30 can be eliminated (or reduced).
In the above description, only one bolt 30 and one drive side key 40 are installed. However, the present invention is not limited to this, and a plurality of bolts 30 and a drive side key 40 may be provided.

(Type 2)
In FIG. 4, the type 2 attachment / detachment mechanism is such that the type 1 driving side key 40 cannot be pulled out in the direction perpendicular to the driving side end face 11, and the form other than this is the same as type 1. Therefore, the bolt 30 (including the through hole 24 and the screw hole 14) is indicated by a one-dot chain line.
The drive-side keyway 25 of the drive-side piece 20 has a narrower mouth width than the depth of the back, and is changed to a trapezoidal drive-side keyway 26 in front view, and is formed on the drive-side end surface 11. No. 15 is changed to a trapezoidal drive side keyway 16 in a front view with a narrower width at the mouth than at the back.

That is, the side surface 27 on the rotational direction side that forms the driving side key groove 26 in the driving side piece 20 is inclined so as to be located in the rotational direction as it goes deeper (closer to the driving side piece end surface 21), on the contrary. The side surface 28 on the counter-rotation direction side that forms the drive-side key groove 26 is inclined so as to be located on the counter-rotation direction side as it becomes deeper (closer to the drive-side piece end surface 21).
In addition, the side surface 17 on the rotation direction side that forms the drive side keyway 16 in the drive side main body 10 is inclined so as to be located in the rotation direction as it goes deeper (away from the drive side end surface 11). The side surface 18 on the counter-rotation direction side that forms the drive-side key groove 16 is inclined so as to be located on the counter-rotation direction side as it goes deeper (the more away from the drive-side end surface 11).
Furthermore, the drive-side key 50 has a shape in which the width of the central portion is narrower than the width of the end portion in a front view and two trapezoids are abutted on the upper side.
A drive side key 50 is installed across the drive side key grooves 26 and 16. Therefore, even if a force is applied in a direction in which the drive-side piece 20 is pulled away from the drive-side end surface 11, the drive-side piece 20 is hardly separated from the drive-side end surface 11. Therefore, since the tensile force acting on the bolt 30 can be reduced, the life of the bolt 30 is extended and the reliability of the apparatus is improved.

(Type 3)
In FIG. 5, the type 3 attachment / detachment mechanism is obtained by removing the type 2 drive side key 50 and installing the drive side piece 20 itself in the drive side recess 19 formed in the drive side end face 11. That is, what is called “inlay”.
Drive that is inclined so as to be positioned in the rotational direction as the distance from the drive-side piece end surface 21 increases to a range close to the surface opposite to the drive-side piece end surface 21 of the drive surface 22 (a range away from the drive-side piece end surface 21). A surface locking portion 29 is formed. Therefore, the side surface on the rotational direction side of the drive-side piece 20 has a “round shape” in front view due to the drive surface 22 and the drive surface locking portion 29.
On the other hand, the side surface 17 on the rotational direction side that forms the driving side concave portion 19 in the driving side main body 10 is inclined so as to be located in the rotational direction as it becomes deeper (away from the driving side end surface 11). In other words, the side surface 17 is inclined in the direction opposite to the inclination direction of the driving surface 22 in a state where the driving surface locking portion 29 of the driving side piece 20 is locked to the side surface 17 of the driving side recess 19.
On the other hand, the side surface 18 on the counter-rotation direction side that forms the drive-side recess 19 is perpendicular to the drive-side end surface 11.

  Therefore, the rotational force transmitted directly on the side surface 18 is surely prevented from relative movement (displacement) between the drive side main body 10 and the drive side piece 20, so that the shearing force acting on the bolt 30 is eliminated. (Or reduce). Further, even if a force is applied in a direction in which the drive-side piece 20 is pulled away from the drive-side end surface 11, the drive-side piece 20 is hardly separated from the drive-side end surface 11. Therefore, since the tensile force acting on the bolt 30 can be reduced, the life of the bolt 30 is extended and the reliability of the apparatus is improved.

(Type 4)
In FIG. 6, the type 4 attachment / detachment mechanism divides the drive-side piece 20 into two parts, and is detachably attached to the drive-side piece body 60 and the drive-side piece body 60 that are detachably installed on the drive-side end surface 11. The drive side piece exchanging unit 70 is installed.
A female screw is formed and a screw hole 62 is formed on the side surface 61 of the drive side piece main body 60 on the rotational direction side. On the other hand, the drive-side piece exchanging portion 70 has a through-hole penetrating the drive-side piece exchanging portion 70 across the surface on the rotation direction side (corresponding to the drive surface 22) and the side surface 71 on the counter-rotation direction side. 72 is provided. The through hole 72 is provided with a seat (spot facing).
The bolt 30 penetrates the through hole 72 and enters the screw hole 62 and is screwed into the female screw.

Therefore, the place where wear or deformation occurs due to use is the drive surface 22 of the drive-side piece replacement unit 70. Therefore, if the small drive-side piece replacement unit 70 is manufactured and prepared in advance, the drive surface 22 When wear or deformation occurs, it is only necessary to replace the drive side piece replacement unit 70. Therefore, since it is only necessary to prepare an inexpensive drive-side piece replacement unit 70, it is possible to reduce maintenance costs associated with equipment inventory.
In the above, the driving side piece exchanging unit 70 is provided for the type 1, but the driving side piece 20 is divided into two parts for the types 2 and 4 so that the driving side piece main body 60 and the driving side are divided. You may make it the structure which comprises the piece exchange part 70. FIG.
In addition, the driven piece 80 has a structure (not shown) including a driven piece main body and a driven piece replacement according to the driving piece 20, and the driving piece replacement 70 and the driven side. In order to improve the wear resistance of the piece replacement part, for example, hard chrome plating may be applied to the surface (meshing surface) where the two come into contact to reduce the frictional resistance, or metal spraying (titanium coating etc.) The hardness may be increased. If it does so, the lifetime as a member will be extended.

  The present invention has the above-described configuration, and even if wear and deformation on the meshing surface proceed, the increase in repair cost can be suppressed, and the time required for repair can be shortened. It can be widely used as a claw clutch that transmits

DESCRIPTION OF SYMBOLS 1 Drive shaft 9 Drive shaft 10 Drive side main body 11 Drive side end face 12 Drive side trough 14 Screw hole 15 Drive side key groove 16 Drive side key groove 17 Side face 18 Side face 19 Drive side recessed part 20 Drive side piece 21 Drive side piece end face 22 Drive Surface 23 Drive side clearance surface 24 Through hole 25 Drive side key groove 26 Drive side key groove 27 Side surface 28 Side surface 29 Drive surface locking portion 30 Bolt 40 Drive side key 50 Drive side key 60 Drive side piece main body portion 61 Side surface 62 Screw hole Reference Signs List 70 Drive side piece exchanging part 71 Side surface 72 Through hole 73 Seat 80 Drive side piece 81 Drive side piece end surface 82 Drive surface 83 Drive side clearance surface 90 Drive side main body 91 Drive side end surface 92 Drive side trough 100 Claw clutch 110 Drive side member 111 Guide protrusion 190 Driven side member 191 Guide hole 200 Rotating shaft

Claims (7)

A drive side member installed on the drive shaft and a driven side member installed on the driven shaft;
The drive-side member includes a drive-side main body attached to the drive shaft, a drive-side end surface formed on the drive-side main body and perpendicular to the rotation shaft, and a drive-side piece detachably installed on the drive-side end surface Comprising
The driven-side member includes a driven-side main body attached to the driven shaft, a driven-side end surface formed on the driven-side main body and perpendicular to the rotating shaft, and a driven-side piece detachably installed on the driven-side end surface. Comprising
The drive side piece includes a drive side piece main body portion detachably installed on the drive side end face, and a drive side piece exchange portion detachably installed on the drive side piece main body portion, and the drive side piece A side surface on the rotation direction side is formed in the piece exchange part,
The driven-side piece includes a driven-side piece main body that is detachably installed on the driven-side end surface, and a driven-side piece replacement that is detachably installed on the driven-side piece main body. The side of the counter rotation direction side is formed in the piece exchange part,
The claw clutch characterized in that a side surface on the rotational direction side of the driving side piece abuts on a side surface on the counter rotation direction side of the driven side piece. The drive-side end surface and the drive-side piece are prevented from relative movement by drive-side keys installed in drive-side key grooves formed on both of them,
The claw according to claim 1, wherein the driven side end surface and the driven side piece are prevented from moving relative to each other by a driven side key installed in a driven side key groove formed on each of them. clutch. When the driving side keyway is narrower at the mouth than at the back, the driving side key is narrower at the center than at the end, and when the driving side key is installed in the driving side keyway The driving side piece cannot be pulled out from the driving side end surface in a direction perpendicular to the driving side end surface,
When the driven key groove is narrower at the mouth than at the back, the driven key is narrower at the center than at the end, and the driven key is installed in the driven key groove. 3. The pawl clutch according to claim 2 , wherein the driven piece cannot be removed from the driven side end face in a direction perpendicular to the driven side end face. A drive-side end surface recess into which a part of the drive-side piece can enter is formed in the drive-side end surface, and a relative movement is prevented by a part of the drive-side piece entering the drive-side end surface recess,
A driven-side end surface recess into which a part of the driven-side piece can enter is formed in the driven-side end surface, and a relative movement is prevented by a part of the driven-side piece entering the driven-side end surface recess. The pawl clutch according to claim 1. The drive-side end surface recess has a narrower width at the mouth than the back, and the drive-side piece has a width at a predetermined distance from one end surface that is narrower than the width of the one end surface. When a portion close to the one end surface of the driving side piece enters, the driving side piece cannot be pulled out from the driving side end surface in a direction perpendicular to the driving side end surface,
The driven-side end surface recess has a narrower width at the mouth than the back, and the driven-side piece has a width at a predetermined distance from one end surface that is narrower than the width of the one end surface. The driven-side piece cannot be pulled out from the driven-side end face in a direction perpendicular to the driven-side end face when a portion close to the one end face of the driven-side piece enters. 4. Claw clutch according to 4. The side surface on the rotation direction side of the driving side piece is inclined with respect to the driving side end surface so as to protrude toward the rotation direction side as the distance from the driving side end surface increases.
The side surface on the counter-rotating direction side of the driven piece is inclined with respect to the driven end surface so as to protrude in the counter-rotating direction as the distance from the driven end surface increases. The claw clutch according to any one of the above. There are a plurality of drive-side pieces, each of which has a drive-side piece end face parallel to the drive-side end face, and the drive face which is the side face on the rotation direction side of the drive-side piece and the drive-side piece end face intersect A ridge line on the direction side and a ridge line on the counter-rotation direction side where the drive-side clearance surface that is the side surface on the counter-rotation direction side of the drive-side piece and the end surface of the drive-side piece are located in the radial direction including the rotation axis, respectively. Presenting
A ridge line on the rotation direction side of the first drive side piece, which is one of the plurality of drive side pieces, and a ridge line on the counter-rotation direction side of the second drive side piece adjacent to the first drive side piece; The drive side valley opening angle formed by the rotation axis with respect to the rotation axis is greater than the drive side mountain opening angle between the rotation direction side ridge line and the counter rotation direction side ridge line of the first drive side piece with respect to the rotation axis. The difference in opening angle is large,
A gap that is a product of the radius of curvature of the inner periphery of the first driving side piece multiplied by the tangent (tan) of the driving side opening angle difference is the distance between the driving side end face and the driving side piece end face. Greater than the amount of protrusion, which is the product of multiplying the tangent (tan) of the inclination angle inclined with respect to the normal line of the drive side end face of the drive surface
There are a plurality of driven side pieces, each having a driven side piece end surface parallel to the driven side end surface, and a driven surface that is a side surface on the counter-rotation direction side of the driven side piece intersects with the driven side piece end surface. The ridge line on the counter-rotation direction side, and the ridge line on the rotation direction side where the driven side clearance surface that is the side surface on the rotation direction side of the driven side piece and the end surface of the driven side piece are located in the radial direction including the rotation axis. Presenting
A ridge line on the rotation direction side of the first driven piece that is one of the plurality of driven side pieces, and a ridge line on the counter rotation direction side of the second driven piece adjacent to the first driven piece. Is driven more than the driven side opening angle formed by the ridge line on the rotation direction side and the ridge line on the counter-rotation direction side of the first driven piece with respect to the rotation axis. The side opening angle difference is large,
A gap that is a product of the radius of curvature of the inner peripheral side of the first driven piece and the tangent (tan) of the driven opening difference is a distance between the driven end face and the driven piece end face. 7. The claw clutch according to claim 6, wherein the amount of protrusion is a product of a product obtained by multiplying the driven surface by a tangent of an inclination angle inclined with respect to a normal line of the driven side end surface of the driven surface.

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