JP2015172392A - Eccentric cam type supporting position adjustment device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily and quickly implement an assembling work of a supported member, and an adjustment work of a supporting position by suppressing misalignment of a pair of eccentric cams, in an eccentric cam type supporting position adjustment device capable of adjusting the supporting position of the supported member by the pair of eccentric cams.SOLUTION: As eccentric cams 22, 24 held in a pair of cam holding portions 54, 56 are integrally connected to each other through a connection member 20, misalignment of the eccentric cams 22, 24 can be suppressed even when the eccentric cams 22, 24 get loose due to the play between the cam holding portions 54, 56, and workability in assembling a connection bolt 40 to the pair of eccentric cams 22, 24 is improved. Further as the pair of eccentric cams 22, 24 can be integrally rotated around a first axis S1, generation of burrs caused by the phase shift therebetween and the like can be suppressed, and an adjustment work of a supporting position of the connection bolt 40, that is, a connecting position of a car body-side connecting portion 14 can be easily and quickly implemented.

Description

  The present invention relates to an improvement of an eccentric cam type support position adjusting device capable of displacing a support position by a pair of eccentric cams.

  (a) A pair of fastening flanges are disposed on the first axis so as to be rotatable around the first axis, respectively, and a support portion is provided on the second axis that is offset from the first axis. (B) a supported member is disposed across the support portion of the pair of eccentric cams, and the pair of eccentric cams rotate about the first axis. There is known an eccentric cam type support position adjusting device that displaces the support position of the supported member around the first axis. The apparatus described in FIG. 9A of Patent Document 1 is an example, and a pair of washers 212 is an eccentric cam, a through hole through which the bolt 211 is inserted is a support portion, and the bolt 211 is a supported member.

JP 2011-126386 A

  However, in such a conventional eccentric cam type support position adjusting device, the pair of eccentric cams may rattle and misalign, and time is required for assembly work when the supported member is assembled to the pair of eccentric cams. There was a case. Further, when the support position of the supported member is adjusted by rotating the eccentric cam about the first axis, the pair of eccentric cams is likely to be twisted, and the adjustment of the support position is troublesome and time consuming. There was a case. For example, when the fastening flange that rotatably holds the pair of eccentric cams is made of a casting, the dimensional accuracy is poor, so that the eccentric cams are not misaligned or rattled.

  The present invention has been made against the background of the above circumstances, and an object of the present invention is to provide an eccentric cam type support position adjusting device capable of adjusting a support position of a supported member by a pair of eccentric cams. In other words, it is possible to easily and quickly perform the work of assembling the supported member and adjusting the support position.

  In order to achieve the above object, the first invention is (a) arranged on a pair of fastening flanges spaced apart from each other so as to be rotatable about the first axis on the first axis, respectively. A pair of eccentric cams provided with support portions on the second axis deviated from, and (b) a supported member is disposed across the support portions of the pair of eccentric cams, and An eccentric cam type support position adjusting device for displacing the support position of the supported member around the first axis by rotating the pair of eccentric cams about the first axis. (C) The pair of eccentric cams Are integrally connected to each other via a connecting member.

  According to a second aspect of the present invention, in the eccentric cam type support position adjusting device according to the first aspect of the present invention, the connecting member is provided with the pair of eccentric cams and a pair of parallel plate portions perpendicular to the first axis and parallel to each other. It has the connection part which connects the parallel plate part, and has comprised the U shape as a whole.

  The third invention is the eccentric cam type support position adjusting device according to the second invention, wherein (a) the pair of eccentric cams has a cylindrical outer peripheral surface centered on the first axis, respectively (b) The pair of fastening flanges have a flat plate shape parallel to each other, and each has a groove-shaped cam holding portion having a width corresponding to the diameter of the outer peripheral surface of the cylinder, and the eccentric cam is provided in the cam holding portion. The cam holding portion is rotatably held around the first axis, and the cam holding portion reaches the outer peripheral edge of the fastening flange and is opened.

  According to a fourth aspect of the present invention, in the eccentric cam type support position adjusting device of the third aspect, the pair of eccentric cams has a columnar shape having the cylindrical outer peripheral surface, and the pair of parallel plate portions of the connecting member It is provided so that it may protrude from a board surface.

  According to a fifth aspect of the invention, in the eccentric cam type support position adjusting device according to the third aspect of the invention, the connecting member is a single metal plate bent into the U shape, and the parallel plate portion has the cylindrical outer peripheral surface. It is provided, The said support part is provided, The parallel plate part is used as it is as the said eccentric cam, It is characterized by the above-mentioned.

  In such an eccentric cam type support position adjusting device, since the pair of eccentric cams are integrally connected to each other via the connecting member, for example, the eccentric cam rattles due to dimensional error or play of the pair of fastening flanges. Even in this case, misalignment and phase shift of the pair of eccentric cams are prevented, and the workability of assembling the supported member to the support portions of the pair of eccentric cams is improved. Further, since the pair of eccentric cams can be integrally rotated around the first axis, the occurrence of twisting or the like due to the phase shift or the like is suppressed, and the work for adjusting the support position of the supported member is easy. And it can be done quickly.

  In the second invention, since the connecting member has a pair of parallel plate portions and a connecting portion and has a U-shape as a whole, it can be manufactured easily and inexpensively by, for example, pressing a single metal plate material. .

  In the third aspect of the invention, the pair of eccentric cams has a cylindrical outer peripheral surface centered on the first axis, and is held rotatably about the first axis by the cam holding portion provided on the pair of fastening flanges. The apparatus is simple and inexpensive compared to the case where a rotating shaft or the like is provided.

  In the fifth invention, since the connecting member is made of a single metal plate and the parallel plate portion is used as an eccentric cam as it is, the connecting member having the function of the eccentric cam can be easily and inexpensively made by press working or the like. Compared to the case where the eccentric cam is configured separately and fixed to the parallel plate part by welding or the like, or is integrally provided to the parallel plate part by cutting or the like. Manufacturing cost can be greatly reduced.

It is a perspective view which shows the state by which the one end part of a suspension arm is supported by the eccentric cam type support position adjustment apparatus which is one Example of this invention. It is sectional drawing of the II-II arrow part in FIG. FIG. 2 is a perspective view independently showing a cam member integrally provided with a pair of eccentric cams in the embodiment of FIG. 1. 3A is a front view, FIG. 3B is a left side view, and FIG. 3C is a right side view of the cam member of FIG. 3. It is a perspective view which shows independently the arm attaching part of the Example of FIG. It is a side view of the arm attachment part of FIG. It is a figure explaining the other Example of this invention, and is a perspective view of the cam member which has the function of an eccentric cam and can be easily manufactured by press work. FIG. 8A is a front view, FIG. 7B is a left side view, and FIG. 8C is a right side view of the cam member of FIG. It is a side view of the arm attachment part in which the cam member of FIG. 7 is arrange | positioned.

  The present invention is suitably applied to, for example, a vehicle suspension arm attachment structure, but can also be applied to a support structure for other members for vehicles and a support structure for various members other than those for vehicles. The eccentric cam is rotatably held around the first axis by, for example, the outer peripheral surface of the cylinder, but can be arranged to be rotatable around the first axis using a rotary shaft. As the support portion provided on the second axis, for example, a through hole into which a connection bolt or a connection pin as a supported member is inserted is suitable.

  As the connecting member, for example, a member having a pair of parallel plate portions and a connecting portion and having a U-shape as a whole as in the second invention is suitably used. The connecting portion may have an arc shape or a curved shape, but may have a linear shape parallel to the first axis, or may have an L shape that is bent so that the intermediate portion protrudes. Embodiments are possible. Further, an extension part extending in a radial direction perpendicular to the first axis may be provided on the pair of parallel plate parts, and the leading ends of the extension parts may be connected by a connecting part. The pair of eccentric cams may be configured separately and may be integrally fixed to the connecting member by fixing means such as welding or press fitting, but may be integrally provided to the connecting member by cutting or the like. .

  The cam holding portions provided on the pair of fastening flanges are provided, for example, on the outer wall surfaces of the pair of fastening flanges, but can also be provided on the inner wall surfaces facing each other of the pair of fastening flanges. The cam holding part is provided with a constant width dimension substantially equal to the diameter dimension of the cylindrical outer peripheral surface of the eccentric cam, for example, but the one end part has a semicircular arc shape, or the width dimension gradually increases toward the outer peripheral edge of the fastening flange. It is also possible to do. The pair of fastening flanges are also provided with elongated holes that allow the supported member to pass therethrough and allow the supported member to be displaced about the first axis, if necessary. The oblong hole is suitably a rectangle or an oval shape with a semicircular end, but may be an arc shape centered on the first axis, for example. Instead of the long hole, a notch or a slit opened at the outer peripheral edge of the fastening flange may be provided. The cam holding portion does not necessarily have to hold the eccentric cam so as to be rotatable around a fixed first axis. For example, the cam holding portion is linear to allow the supported member to be displaced about the first axis. When the long hole is provided, the first axis, that is, the eccentric cam may be displaced in a direction perpendicular to the long hole.

  The pair of fastening flanges are integrally provided on a mounting portion to which a supported member such as a suspension arm is mounted. For example, if the mounting portion is made of cast metal and has a low dimensional accuracy, a gap between the cam holding portion and the eccentric cam is provided. It is necessary to provide a predetermined play. In that case, the pair of eccentric cams are integrally connected by the connecting member, so that the misalignment between each other is suppressed, and the workability of assembling the supported member and the workability of position adjustment are improved. A fastening flange other than a casting made of steel or the like that can obtain a relatively high dimensional accuracy can be employed, and the cam holding portion of the casting fastening flange can be made accurate by cutting or the like.

  The eccentric cam according to the fourth aspect of the invention can be integrally provided on the pair of parallel plate portions of the connecting member by cutting or the like, but the eccentric cam configured separately is integrated with the parallel plate portion by welding or press fitting. It may be fixed. The eccentric cam can be provided on the inner side surface of the pair of parallel plate portions or can be provided on the outer side surface. The cam holding portion provided on the fastening flange corresponds to the eccentric cam and the outer side surface of the fastening flange. Or it is provided on the inner surface. In the fifth invention, since the parallel plate portion is used as an eccentric cam as it is, the cam holding portion provided on the fastening flange may be provided on either the outer side surface or the inner side surface of the fastening flange.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a perspective view of an eccentric cam type support position adjusting device 10 (hereinafter simply referred to as a support position adjusting device 10) according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view taken along the line II-II in FIG. FIG. The support position adjusting device 10 is for attaching a vehicle body side connecting portion 14 of a suspension arm 12 of a vehicle to a vehicle frame or the like, an arm attachment portion 16 provided integrally with the frame or the like, and the arm thereof. The mounting portion 16 is provided with a cam member 18 arranged to be rotatable around the first axis S1. The vehicle body side connecting portion 14 is connected to the cam member 18 via a connecting bolt 40 through which the shaft center is inserted by a vibration isolating bush or the like having an elastic body such as rubber.

  FIG. 3 is a perspective view showing the cam member 18 alone, and FIG. 4 is a three-side view showing a front view, a left side view, and a right side view of the cam member 18. The cam member 18 includes a connecting member 20 having a substantially U shape as a whole, and a pair of plate-shaped eccentric cams 22 and 24 provided on the connecting member 20. The connecting member 20 is formed by bending a single metal plate material by pressing or the like, and includes a pair of parallel plate portions 26 and 28 perpendicular to the first axis S1 and parallel to each other, and the parallel plate portions 26 and 28. And a connecting portion 30 for connecting the two. The substantially disk-shaped parallel plate portions 26 and 28 are provided with extending portions 27 and 29 extending in the same radial direction perpendicular to the first axis S1, respectively. The leading ends of 29 are integrally connected by a connecting portion 30 substantially parallel to the first axis S1, and the connecting member 20 has a U-shape when viewed from the front in FIG. The pair of eccentric cams 22 and 24 are provided concentrically with the common first axis S1 on the inner surfaces of the pair of parallel plate portions 26 and 28 that are separated from each other.

  The pair of eccentric cams 22 and 24 have the same shape and form a flat columnar shape having a cylindrical outer peripheral surface with the first axis S1 as the center, and from the inner side surfaces of the parallel plate portions 26 and 28 to the inside. It is provided to protrude. The pair of eccentric cams 22 and 24 are provided integrally with the parallel plate portions 26 and 28, for example, by cutting or the like. It may be fixed integrally. Further, the eccentric cams 22 and 24 are provided with through holes 32 and 34 on the second axis S2 shifted from the first axis S1, and the first and second axial holes 32 and 34 are aligned so that the axial centers thereof coincide with each other. The parallel plate portions 26 and 28 are provided in such a posture that the phases around the one axis S1 coincide. The through holes 32 and 34 correspond to support portions and are provided so as to also penetrate the parallel plate portions 26 and 28, and the connection bolts 40 that are supported members are inserted therethrough. The connecting bolt 40 is for connecting the vehicle body side connecting portion 14 to the eccentric cams 22 and 24 substantially concentrically with the second axis S2, and on the outer surface of one parallel plate portion 26, the connecting bolt 40 is connected. A locking groove 42 that engages with the head and stops is provided. When the nut 44 is screwed to the tip of the connecting bolt 40 protruding from the other parallel plate portion 28, the connecting bolt 40 is removed. The vehicle body side connecting portion 14 is connected to the pair of eccentric cams 22 and 24 by being stopped.

  FIG. 5 is a perspective view showing the arm mounting portion 16 alone, and FIG. 6 is a side view of the arm mounting portion 16, which includes a pair of flat plate-shaped fastening flanges 50 and 52 protruding upward in parallel with each other. . The fastening flanges 50 and 52 are spaced apart by a dimension that allows the vehicle body side connecting portion 14 to be inserted, and are symmetrical in the direction of the separation, and are recessed in a groove shape on each outer surface. Cam holding portions 54 and 56 are provided. The cam holding portions 54 and 56 hold the eccentric cams 22 and 24 so as to be rotatable about the first axis S1, respectively, and have a width dimension corresponding to the diameter of the cylindrical outer peripheral surface of the eccentric cams 22 and 24. Is provided. Further, the cam holding portions 54 and 56 are provided upward and reach the upper end edges of the fastening flanges 50 and 52, and the eccentric cams 22 and 24 are respectively inserted into the cam holding portions 54 and 56 from the opening portions of the upper ends. To be inserted. Accordingly, the eccentric cams 22 and 24 are held by the pair of fastening flanges 50 and 52 of the arm mounting portion 16 so as to be rotatable around the first axis S1. Since the arm mounting portion 16 is made of a casting and it is difficult to ensure high dimensional accuracy, the cam holding portions 54 and 56 take into account the dimensional error so that the eccentric cams 22 and 24 can be accommodated regardless of the dimensional error. The width dimension is determined to be larger than the diameter dimension of the eccentric cams 22, 24, and a predetermined play is provided between the eccentric cams 22, 24.

  The fastening flanges 50 and 52 also have an insertion hole 62 through which the connecting bolt 40 is inserted at a position shifted downward from the first axis S1 by the same dimension as that of the first axis S1 and the second axis S2. , 64 are provided. In the insertion holes 62 and 64, when the eccentric cams 22 and 24 are rotated around the first axis S1, the connecting bolt 40 is displaced in the circumferential direction around the first axis S1 and in the left-right direction in FIG. In order to allow this, it is a straight elongated hole that is long in the left-right direction, that is, in the longitudinal direction of the suspension arm 12. The width dimension of the insertion holes 62 and 64 is substantially the same as the diameter dimension of the shaft portion of the connection bolt 40, and the connection bolt 40 moves through the insertion holes 62 and 64 in the longitudinal direction as the eccentric cams 22 and 24 rotate. When displaced, the eccentric cams 22 and 24 are slightly displaced up and down in the grooves of the cam holding portions 54 and 56.

  In such a position adjusting device 10, the eccentric cams 22 and 24 are held by the fastening flanges 50 and 52 of the arm mounting portion 16 so as to be rotatable around the first axis S <b> 1. If the cam member 18 is swung as shown by an arrow A in FIG. 6 by rotating it or the like, the connecting bolt 40 disposed across the pair of eccentric cams 22 and 24, and further the vehicle body side connecting portion 14 can be displaced in the left-right direction in FIG. 6 along the insertion holes 62, 64, and the connecting position in the left-right direction, that is, the axial direction of the suspension arm 12 can be adjusted. Thereafter, when the nut 44 is tightened to the connecting bolt 40, the cam member 18 is integrally fixed to the arm mounting portion 16 so as not to rotate around the first axis S1, and the connecting position of the vehicle body side connecting portion 14 is defined. The The extending portions 27 and 29 project from the parallel plate portions 26 and 28 on which the eccentric cams 22 and 24 are provided, and the ends of the extending portions 27 and 29 are connected by the connecting portion 30. The position of the connecting bolt 40 can also be adjusted by swinging the cam member 18 around the first axis S1 by gripping the connecting portion 30 or the like.

  Here, in this embodiment, the arm mounting portion 16 is made of a casting, and the pair of eccentric cams 22 and 24 are held in the cam holding portions 54 and 56 with play. Are integrally connected to each other via the connecting member 20, even if the eccentric cams 22 and 24 rattle due to play with the cam holding portions 54 and 56, mutual misalignment and phase shift are prevented. Assembling workability of the connecting bolt 40 to the through holes 32 and 34 of the pair of eccentric cams 22 and 24 is improved.

  Further, since the pair of eccentric cams 22 and 24 can be integrally rotated around the first axis S1, the occurrence of twisting or the like due to the phase shift or the like is suppressed, and the connecting position of the connecting bolt 40, that is, The adjustment work of the connection position of the vehicle body side connection part 14 can be performed easily and rapidly.

  In addition, since the connecting member 20 has a pair of parallel plate portions 26 and 28 and a connecting portion 30 and is formed in a U shape as a whole, it is easily and inexpensively manufactured by pressing a single metal plate material. it can.

  Further, the pair of eccentric cams 22 and 24 have a cylindrical outer peripheral surface centered on the first axis S1, and the cam holding portions 54 and 56 provided on the pair of fastening flanges 50 and 52 of the arm mounting portion 16 Since it is held so as to be rotatable around one axis S1, the apparatus is simpler and less expensive than the case where a rotating shaft or the like is provided.

  In the cam member 18 of the above embodiment, the eccentric cams 22 and 24 are provided integrally or separately so as to protrude from the inner side surfaces of the pair of parallel plate portions 26 and 28 of the connecting member 20. As shown in FIG. 8, a cam member 70 obtained by bending a single metal plate having a substantially constant plate thickness into a U shape may be employed. The cam member 70 has a pair of parallel plate portions 72 and 74 that are perpendicular to the first axis S1 and parallel to each other, and a connecting portion 76 that connects the parallel plate portions 72 and 74, as shown in FIG. The parallel plate portions 72 and 74 are provided with cylindrical outer peripheral surfaces 78 and 80 having the same diameter dimension around the first axis S1. Further, as shown in FIG. 9, the outer surface of the pair of fastening flanges 50, 52 of the arm mounting portion 16 has a width dimension (slightly smaller than the outer diameter) corresponding to the outer diameter of the cylindrical outer peripheral surfaces 78, 80. A groove-shaped cam holding portion 82 having a large width dimension is provided so as to reach the upper end edge of the fastening flanges 50 and 52, and the parallel plate portions 72 and 74 are inserted and held in the cam holding portion 82. As a result, the cam member 70 is assembled to the arm mounting portion 16 so as to be swingable about the first axis S1 as indicated by an arrow A. In the present embodiment, the cam member 70 corresponds to a connecting member, and the pair of parallel plate portions 72 and 74 directly function as an eccentric cam. The cam holding portion on the fastening flange 52 side has substantially the same configuration as the cam holding portion 82 on the fastening flange 50 side shown in FIG.

  The parallel plate portions 72 and 74 are provided with the through holes 32 and 34 as support portions on the second axis S2 shifted from the first axis S1, while the pair of fastening flanges 50 of the arm attachment portion 16 are provided. 52 is provided with elongated insertion holes 62 and 64 through which the connecting bolt 40 is inserted. As a result, the connecting bolt 40 disposed across the through holes 32 and 34 of the pair of parallel plate portions 72 and 74 has the first axis along with the swing of the cam member 70 indicated by the arrow A in FIG. 9 is linearly moved in the circumferential direction around S1 (left and right direction in FIG. 9), and the vehicle body side connecting portion 14 is displaced in the left and right direction in FIG. 9, so that the connection position in the left and right direction, that is, the axial direction of the suspension arm 12 is changed. Can be adjusted. One parallel plate portion 72 is bent and raised so that a pair of cut and raised pieces 86 and 88 protrude outward on both sides of the through hole 32, and the head of the connecting bolt 40 is locked. Yes. As a result, the connecting bolt 40 is rotated to swing the cam member 70 as indicated by the arrow A so that the connecting position of the suspension arm 12 can be adjusted, and the nut 44 can be easily tightened to the connecting bolt 40. Can do. The parallel plate portions 72 and 74 are provided with extension portions 73 and 75 extending in the same radial direction perpendicular to the first axis S1, respectively, and the tips of the extension portions 73 and 75 are provided at the ends. They are integrally connected by a connecting portion 76 substantially parallel to the first axis S1.

  Also in this embodiment, since the pair of parallel plate portions 72 and 74 functioning as eccentric cams are provided integrally with the cam member 70, even if the parallel plate portions 72 and 74 rattle in the cam holding portion 82, they are mutually connected. Misalignment and phase deviation of the pair of parallel plate portions 72, 74 are prevented, and the workability of assembling the connection bolt 40 with respect to the through holes 32, 34 of the pair of parallel plate portions 72, 74 is improved. That is, it is possible to obtain the same operation and effect as in the above-described embodiment, for example, the operation of adjusting the connection position of the vehicle body side connection portion 14 can be performed easily and quickly. In addition, since the cam member 70 is composed of a single metal plate material and the parallel plate portions 72 and 74 are used as an eccentric cam as they are, the cam member 70 having the function of the eccentric cam is pressed or the like. It can be manufactured easily and inexpensively, and the eccentric cam is configured separately and fixed to the parallel plate portions 72 and 74 integrally by welding, or integrated with the parallel plate portions 72 and 74 by cutting or the like. The manufacturing cost can be greatly reduced as compared with the case where it is provided.

  As mentioned above, although the Example of this invention was described in detail based on drawing, these are one Embodiment to the last, This invention is implemented in the aspect which added the various change and improvement based on the knowledge of those skilled in the art. be able to.

  DESCRIPTION OF SYMBOLS 10: Eccentric cam type support position adjustment apparatus 20: Connecting member 22, 24: Eccentric cam 26, 28: Parallel plate part 30: Connecting part 32, 34: Through hole (support part) 40: Connection bolt (supported member) 50 52: Fastening flange 54, 56: Cam holding part 70: Cam member (connecting member) 72, 74: Parallel plate part (eccentric cam) 76: Connecting part 78, 80: Cylindrical outer peripheral surface 82: Cam holding part S1: No. 1 axis S2: 2nd axis

Claims (5)

A pair of fastening flanges disposed on the first axis and spaced apart from each other so as to be rotatable about the first axis, and provided with a support on a second axis that is offset from the first axis. Has an eccentric cam,
A supported member is disposed across the support portion of the pair of eccentric cams, and the pair of eccentric cams is rotated about the first axis to thereby change the support position of the supported member. In the eccentric cam type support position adjusting device that is displaced around the first axis,
The pair of eccentric cams are integrally connected to each other via a connecting member. Eccentric cam type support position adjusting device. The connecting member is provided with the pair of eccentric cams, and has a pair of parallel plate portions that are perpendicular to the first axis and parallel to each other, and a connecting portion that connects the parallel plate portions. The eccentric cam type support position adjusting device according to claim 1, which has a shape. The pair of eccentric cams each include a cylindrical outer peripheral surface centered on the first axis,
The pair of fastening flanges have a flat plate shape parallel to each other, and each has a groove-shaped cam holding portion having a width corresponding to the diameter of the outer peripheral surface of the cylinder, and the eccentric cam is provided in the cam holding portion. 3. The eccentric cam type according to claim 2, wherein the cam holding portion is rotatably held around the first axis, and the cam holding portion is opened to reach the outer peripheral edge of the fastening flange. Support position adjustment device. The pair of eccentric cams has a columnar shape having the cylindrical outer peripheral surface, and is provided so as to protrude from the plate surfaces of the pair of parallel plate portions of the connecting member. An eccentric cam type support position adjusting device according to claim 1. The connecting member is formed by bending a single metal plate into the U shape, and the parallel plate portion is provided with the cylindrical outer peripheral surface and the support portion, and the parallel plate portion is left as it is. The eccentric cam type support position adjusting device according to claim 3, wherein the eccentric cam type support position adjusting device is used as the eccentric cam.

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