JP5219746B2 - Gear assembly bracket and gear assembly structure - Google Patents

Description

  The present invention relates to a gear assembling bracket and a gear assembling structure, and in particular, is attached to a rotating shaft of an in-vehicle display device arranged so as to be rotatable around one axis, and the rotational driving force of an electric motor is increased. The present invention relates to an improvement of a bracket in which a transmission gear to be transmitted to such a rotation shaft is assembled, and a structure in which the transmission gear is advantageously assembled to such a gear assembly bracket.

  In recent years, there has been a high demand for higher grades and improved convenience for vehicles, particularly automobiles, and so on, so as to satisfy such demands, so-called in-vehicle devices such as liquid crystal display devices such as monitors for televisions and car navigation systems. Display devices are being installed.

  As a kind of such in-vehicle display device, a display case that accommodates a display main body having a monitor screen and an attachment member that is attached to a vehicle are provided so as to protrude outward with respect to the display case. The provided rotating shaft has a structure that is supported by the support portion of the mounting member, and the display case is rotated around the rotating shaft in a state where the mounting member is mounted on an instrument panel or the like of the automobile. There are known devices that are configured so that the display body can stand up or lie down (see, for example, Patent Document 1 below).

  In an in-vehicle display device having such a structure, an electric motor is generally installed on an attachment member, and a transmission gear is attached to a drive shaft of the electric motor with respect to a rotation shaft of the display case. It is attached in mesh with the drive gear. As a result, the rotational driving force of the electric motor is transmitted to the rotation shaft of the display case via the transmission gear, so that the display case is automatically rotated as the electric motor is driven. It is like that.

  By the way, in many cases, the transmission gear attached to the rotation shaft of the display device (display case) is assembled to a gear assembly bracket that supports the rotation shaft and is fixed to the attachment member. Thereby, the transmission gear is arranged at a predetermined position of the mounting member so as to be rotatable integrally with the rotation shaft. There are various types of gear assembly brackets to which this transmission gear is assembled, and as one of them, a first support plate and a second support plate that are arranged to face each other with a predetermined distance therebetween, There is one made of a single metal plate material having a U-shape, which includes a connecting plate that connects corresponding end portions of both the support plates to each other.

  When the transmission gear is assembled to such a gear assembly bracket, the transmission gear is disposed between the first support plate and the second support plate. The rotation shaft of the display device extends through the first support plate and the second support plate, straddles between the first and second support plates, and is positioned between the two support plates. It is fixed to at least one of the first support plate and the second support plate in a state of being inserted into an insertion hole extending in the axial direction provided in the transmission gear. As a result, the transmission gear is assembled in a state where the transmission gear is attached to the rotation shaft supported by the first and second support plates. Note that the transmission gear is usually disposed between the first and second support plates in a state in which the transmission gear is not movable in the axial direction. The end surfaces of the cylindrical portion that is integrally formed coaxially with the surface are brought into contact with the opposing surfaces of the first and second support plates, or the cylindrical portions provided on both end surfaces in the axial direction of the transmission gear. After passing through each support plate, a support shaft with an outer flange that comes into contact with the opposite surface of each support plate is inserted into the cylindrical portion of the transmission gear and fixed. This is easily realized.

  Many of these gear mounting brackets are the same in two places in the length direction so that a single flat metal plate having a long rectangular shape exhibits a U-shape by, for example, pressing. It is formed by being bent at a right angle in the thickness direction. In other words, in the conventional gear mounting bracket, the first support plate and the second support plate are provided at both ends of the connecting plate, and the end opposite to the connecting plate is the free end. Thus, each is bent.

  For this reason, the conventional bracket for mounting the gear is, for example, the first support plate and the second support plate are sandwiched between something from the outside before the transmission gear is assembled, or both support The first and second support plates when a pressing force is applied to the first and second support plates in a direction in which the first and second support plates are brought closer to each other or in a direction in which the first and second support plates are separated from each other. Each bent portion between the connecting plate and the connecting plate has a drawback that it is relatively easily deformed. And if each bending part deform | transforms in that way, the 1st and 2nd support plate will incline so that it may fall on the mutually opposing surface side (inner side) and the opposite side (outer side) (first and second). The distance between the opposing surfaces of the second support plate is gradually narrowed toward the free end side or is gradually increased), whereby the distance between the opposing surfaces of the first and second support plates The distance becomes a size different from the design dimension, specifically, the dimension approximately coincident with the axial length of the transmission gear, causing the following problems.

  That is, if the first support plate and the second support plate are tilted so as to fall toward each other, the distance between the free ends of the both support plates becomes smaller than the design dimension. As a result, when the transmission gear is assembled between the first support plate and the second support plate, there arises a problem that the transmission gear cannot be smoothly fitted between the two support plates.

  Further, if the first support plate and the second support plate are tilted so as to fall on the opposite side to the opposite surface side, the distance between the opposite surfaces of the both support plates becomes larger than the design dimension. . In such a case, when assembling the transmission gear to the bracket, for example, the cylindrical portions formed on both end surfaces in the axial direction of the transmission gear are passed through the respective support plates, and the transmission gear is connected to the first support plate and the second support plate. When it arrange | positions between these, it may become difficult for the cylindrical part of a transmission gear to be smoothly penetrated in the through-hole of each support plate. In addition, the transmission gears are both in a state where the end faces on both sides in the axial direction of the transmission gear and the tip surfaces of the cylindrical portions provided on the end faces are in contact with the opposing surfaces of the first and second support plates. In the case of arranging between the support plates, useless gaps and backlash occur between the surfaces to be brought into contact with each other. When such a gap or backlash occurs, the transmission gear is displaced in the axial direction by an amount corresponding to the size of the gap or backlash during automatic rotation around the rotation axis of the display device. The end surfaces on both axial sides of the plate and the opposing surfaces of the support plates contact or collide, and there is a risk that abnormal noise may be generated. Although the abnormal noise generated when the display device is rotated is not so large, since the in-vehicle display device is usually installed near the occupant, it is easily recognized by the occupant. Such abnormal noise is a problem that is difficult to overlook.

  Moreover, in the conventional bracket for mounting the gear, it is structurally impossible to assemble the transmission gear and the rotation shaft to the bracket after the rotation shaft is inserted into the insertion hole of the transmission gear. ing. For this reason, when assembling the transmission gear to such a bracket, after inserting the transmission gear between the first support plate and the second support plate, the rotation shaft is inserted into the insertion hole of the transmission gear. Before the insertion, the first and second support plates are obstructed, and the opening of the transmission gear insertion hole is not visible from the outside. Therefore, it has been necessary to perform an unwieldy and troublesome alignment operation such as adjusting the formation position of the through hole for penetrating the rotation shaft of the support plate. This has led to a decrease in the assembly of the transmission gear with respect to the conventional gear mounting bracket.

JP-A-8-11639

  Here, the present invention has been made in the background as described above, and the solution is to place the transmission gear between the first support plate and the second support plate. In addition, the operation of inserting the rotating shaft of the in-vehicle display device into the insertion hole of the transmission gear can be made easier, and the improvement of the assembly of the transmission gear can be effectively achieved. Under the condition that the transmission gear is arranged between the second support plates, unnecessary gaps and backlash between the two support plates and the transmission gear are advantageously eliminated or suppressed. It is an object of the present invention to provide a novel structure of a gear mounting bracket that can effectively prevent generation of noise between the transmission gear and both support plates due to the presence of play. In the present invention, it is also an object of the present invention to provide a gear assembly structure that allows a transmission gear to be assembled more advantageously with respect to such a gear assembly bracket. is there.

  And in the present invention, in order to solve the above-mentioned problems or the problems grasped from the entire description and drawings of the present specification, it can be suitably implemented in various modes as listed below. is there. Moreover, each aspect described below can be employed in any combination. It should be noted that aspects or technical features of the present invention are not limited to those described below, and can be recognized based on the description of the entire specification and the inventive concept disclosed in the drawings. Should be understood.

(1) It is attached to a rotating shaft of an in-vehicle display device arranged to be rotatable around one axis, and meshed with a driving gear of the electric motor, so that the rotational driving force of the electric motor is transmitted to the rotating shaft. Is a bracket to which a transmission gear for transmission is assembled, and the first support plate and the second support plate which are arranged to face each other with a predetermined distance therebetween, and corresponding ends of both the support plates are connected to each other And the transmission gear is disposed between the first support plate and the second support plate, while the rotating shaft is connected to the first support plate and the second support plate. In an insertion hole extending in the axial direction provided in the transmission gear which extends through the second support plate and extends between the first and second support plates and is located between the two support plates. In the inserted state, the rotating shaft is connected to the first support plate and the second support plate. By being fixed to at least one of the support plates, the transmission gear is extrapolated and attached to the rotating shafts supported by the first and second support plates, respectively. The first support plate and the second support plate are made of separate plate materials independent from each other, while the connecting plate is an end portion of the first support plate. Further, a flat plate-like facing smaller than the second supporting plate is opposed to the first supporting plate at the end opposite to the first supporting plate side of the connecting plate. A piece is integrally formed, and the second support plate is superimposed on a surface of the facing piece opposite to the surface facing the first support plate, and fixed to the facing piece, In the state where the first support plate and the second support plate are arranged to face each other at a predetermined distance, the connection On the axis of the rotation shaft when the rotation shaft is arranged so as to extend between the first and second support plates. For assembling the gear, wherein the shape of the opposing piece is set so that the opposing piece does not come into contact with the transmission gear even if the transmission gear moves before the two support plates are connected. bracket.

(2) A structure for assembling the transmission gear with respect to the gear assembly bracket according to the aspect (1), wherein the transmission gear is formed by the first support plate and the second support plate. Under the state of being disposed between, the opposing portions facing the respective support plates are respectively provided at the end portions on both sides in the axial direction of the transmission gear, and the first and second of the opposing portions are provided on the opposing portion. A protrusion having a tip surface smaller than the area of the surface facing the support plate is integrally formed, and the transmission gear is connected to the surface facing each of the first support plate and the second support plate. The gear assembly is disposed between the first and second support plates in contact with the front end surfaces of the protrusions of the opposing portions provided at both end portions in the axial direction of the transmission gear. Assembly of a gear characterized by being assembled to a bracket Elephants.

(3) The transmission gear is brought into contact with the opposing surfaces of the first support plate and the second support plate at the front end surfaces of the protrusions of the opposing portion provided at both ends in the axial direction. In a state where the transmission gear is clamped between the first support plate and the second support plate, the transmission gear is interposed between the first and second support plates. In the above-described aspect (2), the pressure is held and the at least the tip portion of the protrusion is an easily deformable portion that is easily deformed by being pressed on the basis of the pressure by the pressure means. The gear assembly structure described.

  If the bracket for a gear assembly according to the present invention is used, for example, before connecting the first support plate and the second support plate, the rotating shaft of the in-vehicle display device is passed through the first connection plate. After that, while visually observing the opening of the transmission gear insertion hole, the rotation shaft portion penetrating the first support plate is inserted into the transmission gear insertion hole, and the end face on one side of the transmission gear in the axial direction is inserted. By contacting the first support plate and then connecting the first support plate and the second support plate via the connection plate, the transmission gear is connected to the first support plate and the second support plate. Arranged in between, the rotation shaft can be supported by the first support plate and the second support plate. That is, the transmission gear and the rotation shaft can be assembled in a state where the rotation shaft is inserted through the insertion hole of the transmission gear by an easy operation while visually observing.

  Thereby, in the bracket for a gear assembly which concerns on this invention, it differs from the conventional bracket which consists of a single member with which the 1st support plate and the 2nd support plate were integrally formed in the both ends of the connection board. Thus, before assembling the transmission gear, before inserting the rotating shaft into the transmission gear insertion hole, the position of the insertion hole is determined so that the opening of the transmission gear insertion hole is not visible from the outside. The need to perform a troublesome alignment operation such as adjusting to the formation position of the through hole for penetrating the rotating shaft of the support plate or the second support plate can be advantageously eliminated. Moreover, when the rotation shaft is inserted into the insertion hole of the transmission gear while moving the transmission gear on the axis of the rotation shaft penetrating the first support plate, the first support plate The opposing piece provided at the end of the integrally formed connecting plate opposite to the first support plate does not interfere with the transmission gear. Therefore, in such a gear assembly bracket, when the transmission gear is assembled, the transmission gear is disposed between the first support plate and the second support plate and is rotated into the insertion hole of the transmission gear. The operation of inserting the shaft can be performed very easily.

  Further, in the gear mounting bracket according to the present invention, the first support plate and the second support plate are made of separate plate materials that are independent from each other. Unlike the conventional bracket made of a single member integrally formed at both ends of the connecting plate, before the transmission gear is assembled, the first support plate and the second support plate are connected from the outside thereof. When it is sandwiched by something at the same time, or something is sandwiched between both support plates, it tilts to the opposite surface side or the opposite side, so that between the opposing surfaces of the first and second support plates It can be advantageously eliminated that the distance varies from the design dimensions.

  Further, in the bracket of the present invention, a flat plate-like opposing piece is integrally formed at the end of the connecting plate opposite to the first support plate side so as to face the first support plate, The first support plate and the second support plate are coupled in a state of being opposed to each other via the coupling plate by being overlapped and fixed on the facing piece. It has become. Therefore, if the distance between the overlapping surface of the opposing piece with the second support plate and the first support plate is set to a dimension that substantially matches the axial length of the transmission gear, the second support plate The second support plate is surely opposed to the first support plate simply by overlapping the opposing pieces with each other, and the first support plate and the second support plate are opposed to each other. The face-to-face distance can be matched exactly with the design dimensions.

  In addition, the opposing piece is integrally formed with the connecting plate together with the first supporting plate in a state of being opposed to the first supporting plate, but the size of the opposing piece is larger than that of the second supporting plate. It is also small. Therefore, such an opposing piece and the first support plate are sandwiched between something from the outside at the same time, or something is sandwiched between the opposing piece and the first support plate. It is also possible to prevent as much as possible that the distance between the opposed surfaces of the opposed piece and the first support plate is changed as a result of being inclined to the opposed surface side or the opposite side.

  And, as described above, before connecting the first support plate and the second support plate, by inserting the rotation shaft that penetrates the first support plate into the insertion hole of the transmission gear, At the same time that the first support plate and the second support plate are connected via the connecting plate, the transmission gear is arranged between the two support plates in the state of being extrapolated to the rotating shaft and assembled to the bracket. Will be.

  Therefore, in the gear mounting bracket according to the present invention, when the transmission gear is assembled, the distance between the free ends of the first support plate and the second support plate is smaller than the design dimension. It can be advantageously avoided that it is difficult to smoothly dispose the transmission gear between the two support plates. In addition, the distance between the opposing surfaces of the first support plate and the second support plate is larger than the design dimension, and for this reason, for example, each of the axially opposite sides of the transmission gear disposed between the two support plates. It becomes difficult to smoothly insert a cylindrical portion or the like provided on the end face into the through holes of both support plates, or the first and second support plates on each end face on both axial sides of the transmission gear. In the state of being in contact with each of the opposing surfaces, it is possible to advantageously prevent unnecessary gaps and play between the surfaces to be brought into contact with each other when they are arranged between the two support plates.

  Therefore, in the bracket for mounting a gear according to the present invention as described above, the transmission gear is disposed between the first support plate and the second support plate, and mounted in the insertion hole of the transmission gear. The operation of inserting the rotary shaft of the display device is made easier, and the assembly of the transmission gear can be effectively improved, and the first and second support plates and the transmission gear can be improved. It is possible to effectively prevent the generation of noise between the transmission gear and the two support plates due to the presence of unnecessary gaps and backlash between them.

  And according to the gear assembly structure according to this invention, the effect | action and effect substantially the same as the effect | action and effect which can be show | played in the bracket for gear assembly according to this invention can be enjoyed effectively. In addition, in a state in which the transmission gear is disposed between the first and second support plates of the gear assembly bracket, the contact surfaces of the both support plates have a smaller contact area. Can be contacted. As a result, there is no unnecessary gap or play between the first and second support plates and the transmission gear, while minimizing the sliding resistance caused by contact with each support plate when the transmission gear rotates. Due to this, it is possible to further advantageously prevent the generation of abnormal noise between the transmission gear and the two support plates.

  Hereinafter, in order to clarify the present invention more specifically, embodiments of the present invention will be described in detail with reference to the drawings.

  First, FIG. 1 schematically shows, in a cross-sectional form, a display device attached to an automotive instrument panel as an example of a vehicle-mounted display device equipped with a gear assembly bracket having a structure according to the present invention. Has been. As is apparent from FIG. 1, this display device includes a display case 10 that houses a display main body (none of which is shown) having a known structure with a monitor screen, and the display case 10 is mounted on an automobile. And a housing 12 having a rectangular housing shape to be attached to the instrument panel.

  The display case 10 as a whole has a rectangular shape smaller than that of the housing 12, and rotating shafts 14a and 14b are coaxially arranged on the side surfaces on both sides in the length direction (left and right direction in FIG. 1). It is integrally formed so that it may extend in the direction. Then, one of the two rotating shafts 14a and 14b is inserted into the support cylinder portion 16 formed integrally with the inner surface of the housing 12, and the support cylinder portion 16 rotates the rotation shaft 14a. It is supported movably. The other rotation shaft 14b is installed in the housing 12 and connected to a drive unit 18 that rotates the display case 10 about the rotation shafts 14a and 14b.

  2 and 3, the drive unit 18 includes an electric motor 20, a gear mechanism 24 that connects the drive shaft 22 of the electric motor 20 and the rotating shaft 14b of the display case 10, and the gear mechanism. And a gear mounting bracket 26 to which 24 is mounted.

  More specifically, here, a stepping motor capable of forward and reverse rotation is used as the electric motor 20. The gear mechanism 24 includes a drive gear 28 attached to the drive shaft 22 of the electric motor 20, a first transmission gear 30 that meshes with the drive gear 28, and a second transmission gear 32 that meshes further with the first transmission gear 30. It consists of and. The drive gear 28 and the first and second transmission gears 30 and 32 are all formed using a resin material.

  Of these three types of gears 28, 30, 32, the drive gear 28 is made of a worm. The first transmission gear 30 includes a large-diameter worm wheel portion 34 that meshes with a drive gear 28 made of a worm, and a small-diameter spur gear portion 36 that is integrally formed on one end surface of the worm wheel portion 34 in the axial direction. Have. Further, a cylindrical portion having a smaller diameter than the spur gear portion 36 is provided on an end surface of the spur gear portion 36 opposite to the worm wheel portion 34 side and an end surface of the worm wheel portion 34 opposite to the spur gear portion 36 side. 38a and 38b extend integrally from the center part of each end surface coaxially with the spur gear part 36 and the worm wheel part 34. Further, the inner holes of the cylindrical portions 38 a and 38 b communicate with through holes formed in the center portions of the spur gear portion 36 and the worm wheel portion 34. As a result, an insertion hole 40 having a circular cross section made up of the inner holes of the cylindrical portions 38a and 38b and the through-holes of the spur gear portion 36 and the worm wheel portion 34 extends over the entire length of the first transmission gear 30. It is formed so as to continuously extend in the axial direction with the same inner diameter.

  The second transmission gear 32 is integrally formed with a spur gear portion 42 and two cylindrical portions 44a and 44b extending coaxially with the spur gear portion 42 from the center portions of both axial end faces of the spur gear portion 42, respectively. Have. Even in the second transmission gear 32, the respective inner holes of the two cylindrical portions 44a and 44b are communicated with a through-hole provided in the central portion of the spur gear portion 42. An insertion hole 46 extending continuously in the axial direction is formed by the inner hole and the through hole. The insertion hole 46 has a circular cross-section at the portion formed by the inner hole of the cylindrical portion 44a and the through-hole of the spur gear portion 42, but the portion formed by the inner hole at the cylindrical portion 44b has a rectangular cross-section. It is said that.

  Further, the outer flange portion 48a as an opposing portion protrudes radially outward at a predetermined height and continuously extends in the circumferential direction at the distal end portion of each cylindrical portion 44a, 44b of the second transmission gear 32. 48b are integrally formed with the same annular plate shape. The two outer flange portions 48a and 48b are opposed to each other with the spur gear portion 42 interposed therebetween, and on the surface opposite to each other of the outer flange portions 48a and 48b, A plurality of protrusions 50a and 50b are integrally formed.

  Each of the plurality of protrusions 50a provided on the outer flange portion 48a has a hemispherical shape. As shown in FIG. 3, the plurality of protrusions 50a are equal to each other in the circumferential direction over the entire circumference on the surface of the outer flange portion 48a opposite to the side facing the outer flange portion 48b. They are positioned at intervals. On the other hand, each of the plurality of protrusions 50b provided on the outer flange portion 48b has a conical shape. Although not shown, the plurality of protrusions 50b are also equidistant from each other in the circumferential direction over the entire circumference on the surface of the outer flange portion 48b opposite to the side facing the outer flange portion 48a. It is positioned apart from each other. Further, each protrusion 50b provided on the outer flange portion 48b is made of resin and has a conical shape, so that the tip portion is an easily deformable portion that is relatively easily deformed by an external pressing force. Has been.

  On the other hand, as is apparent from FIG. 2, the gear assembly bracket 26 includes a first support plate 52 and a second support plate 54 that are arranged to face each other with a predetermined distance therebetween via a connecting plate 56. Are connected to each other and have a U-shape as a whole. The gear mounting bracket 26 including the first and second support plates 52 and 54 and the connecting plate 56 is formed using a metal plate.

  As shown in FIGS. 2 and 3, the connecting plate 56 of the gear mounting bracket 26 has a long rectangular flat plate shape, and a circular through hole 58 is formed at the center thereof. The first support plate 52 and the second support plate 54 are made of flat plates having the same size and shape, and a circular first shaft hole 60 and a second shaft hole 62 are formed in each of them. ing. The first shaft holes 60 and 60 and the second shaft holes 62 and 62 provided in the support plates 52 and 54 have the same diameter. Further, the first and second support plates 52 and 54 are attached to the central portion in the length direction (vertical direction in FIG. 2) of one end portion in the width direction (direction perpendicular to the paper surface of FIG. 2). One piece 64 is integrally formed by cutting and raising one by one. Further, a small-diameter through hole 65 is formed at one end in the length direction on the formation side of the attachment side portion 64 in the width direction of the second support plate 54.

  And here, although the 1st support plate 52 and the connection plate 56 are comprised as an integrated article which consists of a single member, the 2nd support plate 54 is the 1st support plate 52 and the connection plate. 56 is configured as a separate and independent member.

  That is, the first support plate 52 extends toward the one side in the thickness direction at an angle of 90 ° from the edge of one side in the length direction (left and right direction in FIG. 2) of the connection plate 56. Are integrally formed. Further, a facing piece 66 is integrally formed on the other side edge portion of the connecting plate 56 in the length direction so as to face the first support plate 52. The facing piece 66 has a width (dimension in the direction perpendicular to the paper surface in FIG. 2) less than half of the width of each of the first and second support plates 52 and 54 having the same size and shape. The support plates 52 and 54 have a length that is approximately half the length of the support plates 52 and 54 (the vertical dimension in FIG. 2), and are made of flat plates that are less than ¼ of the support plates 52 and 54. Yes. The opposing piece 66 has, at one end in the length direction thereof, a width direction opposite to the side on which the first support plate 52 is formed in the length direction of the connecting plate 56 (a direction perpendicular to the paper surface of FIG. 2). ) It is integrated with one end so as to form an angle of 90 ° with the connecting plate 56.

  In other words, the first support plate 52 and the opposed piece 66 smaller than the first support plate 52 are opposed to each other at a predetermined distance at both ends in the length direction of one surface in the thickness direction of the connecting plate 56. Thus, they are integrally formed so as to extend from the connecting plate 56 in parallel. Further, the opposing piece 66 is positioned so as to be biased toward the one end side in the width direction of the connecting plate 56 under the formation state on the connecting plate 56.

  In the facing piece 66 provided on the connecting plate 56 facing the first support plate 52, a small diameter is provided at the base end in the extending direction from the connecting plate 56 (vertical direction in FIG. 2). Through-hole 68 is provided. Further, as is apparent from FIG. 3, one side of the direction perpendicular to the extending direction of the facing piece 66 (the side opposite to the side where the facing piece 66 is offset in the width direction of the connecting plate 56). A first notch portion 70 and a second notch portion 72 are formed at the edge portion. The first notch portion 70 and the second notch portion 72 are formed by cutting out the edge portions into arcs having different diameters. The first notch portion 70 has an arc shape having a diameter larger than the outer diameter of the worm wheel portion 34 of the first transmission gear 30 by a predetermined dimension, and the second notch portion 72 has a second transmission gear. It has an arc shape having a diameter larger than the outer diameter of 32 spur gear portions 42 by a predetermined dimension. The first notch 70 is positioned on the proximal end side of the opposing piece 66 in the extending direction, while the second notch 72 is positioned on the distal end side of the opposing piece 66 in the extending direction. ing.

  In addition, a cover plate 74 is integrally formed on the side edge opposite to the side where the facing piece 66 is offset and located in the width direction of the connecting plate 56. The cover plate 74 is made of a metal plate having a shape bent in a “<” shape, and the space between the opposed surfaces of the first support plate 52 and the opposed piece 66 is viewed from one side in the width direction of the connecting plate 56. It is positioned to cover. Thus, as will be described later, under the state where the drive gear 28 and the first and second electric gears 30 and 32 are assembled to the gear assembly bracket 26, the gears 28, 30, and 32 are covered. The gears 28, 30, and 32 are prevented from adhering dust or the like.

  And here, the second support plate 54 has a small diameter provided on the opposite surface of the opposing piece 66 formed integrally with the connecting plate 56 to the opposite side to the first support plate 52. The tapping screw 76 is screwed into each of the through holes 65 and 68 that are in communication with each other so as to communicate with the through hole 65 of the counter piece 66 in a superposed state. The facing piece 66 and the second support plate 54 are fixed.

  Thus, the first support plate 52 and the second support plate 54 are integrally connected via the connecting plate 56 in a state where they are opposed to each other at a predetermined distance and are arranged to extend in parallel. Thus, the gear mounting bracket 26 is formed with a U-shaped overall shape. Further, in the gear assembly bracket 26 formed in this way, the first shaft holes 60 and the second shaft holes 62 provided in the first and second support plates 52 and 54 respectively are respectively It is positioned coaxially. In addition, the gear mounting bracket 26 is attached to the first and second support plates 52 and 54 by using bolts that are positioned through the mounting pieces 64 and 64 of the display device. It is fixed to the bottom of the housing 12 (see FIG. 1).

  In the present embodiment, as shown in FIG. 2, the drive shaft 22 of the electric motor 20 passes through the through hole 58 of the connection plate 56 of the gear assembly bracket 26 and the second support plate 52 and the second support plate 52. The electric motor 20 is fixed to the connecting plate 32 in a state where the electric motor 20 extends between the opposing surfaces 78 a and 78 b of the support plate 54. As a result, the drive gear 28 attached to the drive shaft 22 of the electric motor 20 is positioned between the opposed surfaces 78a and 78b of the first and second support plates 52 and 54.

  The first transmission gear 30 is disposed between the first and second support plates 52 and 54 in a state where the worm wheel portion 34 is engaged with the drive gear 28 made of a worm. Further, under such an arrangement, the tip of one cylindrical portion 38a of the first transmission gear 30 is inserted into the first shaft hole 60 of the second support plate 54, while the tip of the other cylindrical portion 38b. The surface is brought into contact with the opening peripheral portion of the first shaft hole 60 in the facing surface 78 a of the first support plate 52. Further, the opening on the distal end side of the cylindrical portion 38 b in the insertion hole 40 of the first transmission gear 30 is communicated with the first shaft hole 60 of the first support plate 52.

  The first rotating shaft 80 is inserted through the first shaft hole 60 of the first support plate 52 into the insertion hole 40 of the first transmission gear 30 communicating therewith. The first rotating shaft 80 is made of a round bar longer than the axial length of the first transmission gear 30, and, as shown in FIG. On the other hand, a circumferential groove 84 is formed at the other end in the length direction.

  Then, as shown in FIG. 2, the first rotary shaft 80 causes both end portions in the length direction to protrude outward from the first shaft holes 60 of the first and second support plates 52 and 54. In this state, the first transmission gear 30 is inserted into the insertion hole 40. Further, under such insertion, the outer flange portion 82 provided at one end portion in the length direction of the first rotating shaft 80 is brought into contact with the surface opposite to the facing surface 78a of the first support plate 52. On the other hand, an E-ring 86 is fitted into a circumferential groove 84 provided at the other end in the length direction. Further, the E ring 86 is brought into contact with the distal end surface of the cylindrical portion 38a of the first transmission gear 30 at one end surface.

  As a result, the first transmission gear 30 is rotatable about the first rotation shaft 80 in a state where the first transmission gear 30 meshes with the drive gear 28 with respect to the gear assembly bracket 26, and the first and second support plates 52. , 54 are assembled so as to be immovable in the axial direction between the opposed surfaces 78a and 78b.

  On the other hand, the second transmission gear 32 is disposed between the first and second support plates 52 and 54 in a state where the spur gear portion 42 is engaged with the spur gear portion 36 of the first transmission gear 30. . Further, under such an arrangement state, the respective distal end portions of the two cylindrical portions 44a and 44b of the second transmission gear 30 are placed in the second shaft holes 62 and 62 of the first and second support plates 52 and 54, respectively. It is inserted. Further, outer flange portions 48a and 48b provided at the tip portions of the two cylindrical portions 44a and 44b are respectively positioned to face the opposing surfaces 78a and 78b of the first and second support plates 52 and 54, respectively. At the same time, a plurality of protrusions 50a, 50 provided on the outer flange portions 48a, 48b are brought into contact with the opposing surfaces 78a, 78b of the support plates 52, 54 at their distal end surfaces. In particular, each protrusion 50b in contact with the facing surface 78a of the first support plate 52 is an easily deformable portion by the fastening force of a tapping screw 76 that fixes the second support plate 54 to the facing piece 66, as will be described later. The tip part is crushed.

  The second rotating shaft 88 is inserted into the insertion hole 46 of the second transmission gear 32. The second rotary shaft 88 is made of a round bar longer than the axial length of the second transmission gear 32. As shown in FIG. 3, a square columnar engaging portion 90 is provided in the middle in the length direction. In addition, a chamfered portion 92 in which a part of the outer peripheral surface thereof is chamfered flat is formed at one end portion in the length direction, and a circumferential groove 94 is formed at the other end portion in the length direction.

  Then, as shown in FIG. 2, the second rotary shaft 88 projects both end portions in the length direction outward from the second shaft holes 62 of the first and second support plates 52 and 54. In this state, the second transmission gear 32 is inserted into the insertion hole 46. Further, under such insertion, the rectangular columnar engaging portion 90 at the intermediate portion in the longitudinal direction of the second rotating shaft 88 has a rectangular cross section formed by the inner hole of the cylindrical portion 44b of the second transmission gear 32. The inner circumferential surface of the insertion hole 46 is engaged in the circumferential direction. Further, one end in the length direction having the chamfered portion 92 of the second rotating shaft 88 is inserted into a connecting hole 96 provided at the end of the rotating shaft 14b of the display case 10, and the chamfered portion 92 is formed. The engaging hole 96 is engaged with the inner peripheral surface portion of the connecting hole 96 having a planar shape, and is connected to the rotating shaft 14b so as not to be relatively rotatable. Further, in the circumferential groove 94 provided at the other end in the length direction of the second rotating shaft 88, the E ring 98 is in contact with the tip surface of the cylindrical portion 48a of the second transmission gear 32 at one end surface. , Have been fitted.

  As a result, the second transmission gear 30 cannot rotate relative to the rotation shaft 14b of the display 10 around the second rotation shaft 88 in a state where the second transmission gear 30 is engaged with the first transmission gear 30 with respect to the gear assembly bracket 26. In addition, the first and second support plates 52 and 54 are assembled so as not to move in the axial direction between the opposing surfaces 78a and 78b.

  Thus, in the present embodiment, the rotational driving force of the electric motor 20 is transmitted via the gear mechanism 24 including the drive gear 28 and the first and second transmission gears 30 and 32 that are assembled to the gear assembly bracket 26. The display case 10 is automatically transmitted around the rotation shafts 14a and 14b as the electric motor 20 is driven to rotate in the forward and reverse directions. It is designed to be rotated.

  By the way, when assembling the electric motor 20 and the gear mechanism 24 to the gear assembly bracket 26 in order to realize such automatic rotation of the display case 10, for example, the work proceeds as follows. It is done.

  That is, as shown in FIG. 3, before fixing the second support plate 54 to the facing piece 66 of the connecting plate 56, the drive shaft 22 of the electric motor 20 is inserted into the through hole 58 of the connecting plate 56. The connecting plate 56 is positioned between the first support plate 52 and the opposing piece 66 integrally formed at both ends in the width direction. Then, the electric motor 20 is fixed to the connecting plate 56, while the drive gear 28 is attached to the drive shaft 22 positioned between the first support plate 52 and the facing piece 66.

  Next, with respect to the first shaft hole 60 and the second shaft hole 62 of the first support plate 52, the first rotation shaft 80 and the second rotation shaft 88 are connected to the opposing piece 66 of the first support plate 52. It is inserted from the opposite side to the opposite side. Then, the outer flange portion 82 of the first rotating shaft 80 is brought into contact with the surface of the first support plate 52 opposite to the facing surface 78a. Further, the end of the second rotating shaft 88 on the side where the chamfered portion 92 is formed is projected from the second shaft hole 62 (see FIG. 2).

  Thereafter, the first rotary shaft 80 and the second rotary shaft 88 are inserted into the insertion holes 40 and 46 of the first transmission gear 30 and the second transmission gear 32, respectively. That is, the first transmission gear 30 and the second transmission gear 32 are extrapolated to the first rotation shaft 80 and the second rotation shaft 88, respectively. At this time, the worm wheel portion 34 of the first transmission gear 30 is engaged with the drive gear 28 and the spur gear portions 36 and 42 of the first transmission gear 30 and the second transmission gear 32 are engaged with each other. In this process, since the first support plate 52 and the second support plate 54 are not yet connected, the first and second transmission gears 30 and 32 to the first and second rotating shafts 80 and 88 are provided. This extrapolation operation can be easily performed while visually observing the openings of the insertion holes 40 and 46 of the transmission gears 30 and 32.

  In this state, the tip end surface of the cylindrical portion 38 b formed integrally with the worm wheel portion 34 of the first transmission gear 30 is brought into contact with the facing surface 78 a of the first support plate 52. That is, the first transmission gear 30 is positioned in a state where the peripheral portion of the first shaft hole 60 of the first support plate 52 is sandwiched between the cylindrical portion 38b and the outer flange portion 82 of the first rotating shaft 80. (See FIG. 2).

  Further, the tip portion of one cylindrical portion 38 b of the second transmission gear 32 is inserted into the second shaft hole 62 of the first support plate 52. Along with this, a plurality of protrusions 50b formed integrally with the outer flange portion 48b provided at the tip of the cylindrical portion 38b are arranged around the opening portion of the second shaft hole 62 on the facing surface 78a of the first support plate 52. Make contact position.

  Here, the opposing piece 66 formed integrally with the connecting plate 56 facing the first support plate 52 has a predetermined dimension larger than the outer diameters of the first transmission gear 30 and the second transmission gear 32. A first notch 70 and a second notch 72 having a circular arc shape with a diameter are provided. Therefore, in this step, when the first and second transmission gears 30 and 32 are extrapolated to the first and second rotary shafts 80 and 88, respectively, the transmission gears 30 and 32 are connected to the first support plate 52. Even when the rotary shafts 80 and 88 inserted through the first and second shaft holes 60 and 62 are moved on the axial centers, the transmission gears 30 and 32 do not come into contact with the opposing piece 66. Accordingly, the extrapolation work of the transmission gears 30 and 32 to the rotary shafts 80 and 88 can be performed very smoothly and easily.

  Next, the second support plate 54 is overlapped with the surface of the facing piece 66 opposite to the side facing the first support plate 52 so as to face the first support plate 52. Then, in a state where the first support plate 54 and the facing piece 66 are overlapped, the through holes 65 and 68 of the first support plate 54 and the facing piece 66 are communicated with each other, and the first transmission gear 52 is connected. The tip portion of the cylindrical portion 38 a integrally formed with the spur gear portion 36 and the end portion of the first rotating shaft 80 inserted through the insertion hole 40 of the first transmission gear 30 are connected to the first of the second support plate 54. It is inserted into the shaft hole 60. Of the two cylindrical portions 44 a and 44 b of the second transmission gear 32, the tip of a cylindrical portion 44 a different from the cylindrical portion 44 b whose tip is inserted into the second shaft hole 62 of the first support plate 52. The portion and the end of the second rotating shaft 88 inserted into the insertion hole 46 of the second transmission gear 32 are inserted into the second shaft hole 62 of the second support plate 54. Further, under such an inserted state, the plurality of protrusions 50a formed integrally with the outer flange portion 48a provided at the tip of the cylindrical portion 44a are connected to the first support plate 52 of the second support plate 54. It is made to contact a peripheral part of the opening of the 2nd axial hole 62 in the opposing surface 78a.

  Thereafter, the tapping screw 76 is screwed into the through holes 65 and 68 that are communicated with each other between the second support plate 54 and the facing piece 66, and the second support plate 54 and the facing piece 66 are fixed. Then, the second support plate 54 and the first support plate 52 are coupled via the coupling plate 56 in a state where they are positioned so as to face each other at a predetermined distance and extend in parallel. Thus, the first and second rotating shafts 80 and 88 are positioned so as to pass through the first and second support plates 52 and 54 connected to each other and to extend between the two support plates 52 and 54. At the same time, the first and second transmission gears 30 and 32 are positioned between the first and second support plates 52 and 54 so as to be extrapolated to the first and second rotating shafts 80 and 88, respectively.

  In addition, it connects here so that the distance between the front-end | tips of each processus | protrusion 50a, 50b each integrally formed in the two outer flange parts 48a, 48b of the 2nd transmission gear 32 may mutually oppose and are located in parallel. The distance between the opposed surfaces 78a and 78b of the first and second support plates 52 and 54 is slightly larger. Moreover, the tip portions of the plurality of protrusions 50b that come into contact with the facing surface 78a of the first support plate 52 are easily deformable portions.

  Therefore, when the first support plate 52 and the second support plate 54 are connected, the second transmission gear 32 is connected to the first support plate 52 and the second support plate 52 based on the fastening force of the tapping screw. Is pressed between the support plate 54 and the tip portion of each projection 50b of the second transmission gear 32, which is an easily deformable portion, is pressed from the opposing surface 78a of the first support plate 52. It is deformed to be crushed by pressure. Therefore, for example, due to a dimensional error during molding of the second transmission gear 32 and the first support plate 52, the distance between the opposing surfaces of the outer flange portion 48b and the first support plate 52 is such that the outer flange portion 48b has Even if there is variation in the circumferential direction, it can be advantageously absorbed by the crushing deformation of the plurality of protrusions 50b. As a result, the second transmission gear 32 is positioned more reliably in the outer flange portions 48a and 48b with respect to the first support plate 52 and the second support plate 54 without any gap or play. It can be done. As is clear from this, the clamping means here is constituted by a tapping screw.

  And after that, it protrudes from the first shaft hole 60 and the second shaft hole 62 of the second support plate 54 together with the end portions of the cylindrical portions 38a and 44a of the first and second transmission gears 30 and 32, respectively. In the circumferential grooves 84 and 94 provided at the respective ends of the first rotating shaft 80 and the second rotating shaft 88 that also protrude from the inner holes (insertion holes 40 and 46) of the cylindrical portions 38a and 44a, E rings 86 and 98 are fitted in the state where they are in contact with the end faces of the cylindrical portions 38a and 44a of the first and second transmission gears 30 and 32, respectively. Moreover, while inserting the edge part by the side of the chamfering part 92 formation of the 2nd rotating shaft 88 which protrudes from the 2nd shaft hole 62 of the 1st support plate 52 in the connection hole 96 of the rotating shaft 14b of the display case 10, The chamfered portion 92 is engaged with the flat inner peripheral surface portion of the connecting hole 96. Thus, the first and second rotary shafts 80 and 88 are attached to the first and second transmission gears 30 and 32, respectively, and the rotary shafts 80 and 88 are fixed to the geared bracket 26. Further, the second rotating shaft 88 is connected to the rotating shaft 14b of the display case 10 so as not to rotate relative to the rotating shaft 14b, so that the second rotating shaft 88 functions as a part of the rotating shaft 14b of the display case 10. Do it. As is clear from this, in the present embodiment, a part of the rotation shaft 14 b of the display case 10 is configured by the second rotation shaft 88.

  Thus, the electric motor 20 is fixed to the gear mounting bracket 26, and the drive gear 28 of the electric motor 20 and the first and second transmission gears 30 and 32 meshed directly or indirectly with the drive gear 28. The gear mechanism 24 is assembled. After that, the gear mounting bracket 26 is screwed or bolted to the bottom of the housing 12 at the two attachment pieces 64 and 64.

  As described above, in the gear assembly bracket 26 of the present embodiment, the first support plate 52 and the second support plate 54 are formed of separate members. Therefore, before the gear mechanism 24 including the drive gear 28 and the first and second transmission gears 30 and 32 is assembled to the gear assembly bracket 26, the first support plate 52 and the second support plate 54 are For example, by being sandwiched between something from the outside of them, or something is sandwiched between the support plates 52, 54, etc., it is inclined to the opposite surfaces 78a, 78b side or the opposite side, thereby It can be advantageously eliminated that the distance 78a, 78b between the opposing surfaces of the first and second support plates 52, 54 varies from the design dimensions.

  Further, although the second support plate 54 is not integrally formed with the connecting plate 56, instead, the opposing piece 66 is integrally formed with the connecting plate 56 so as to face the first support plate 54. Has been. Therefore, the second support plate 54 is opposed to the first support plate 52 at a predetermined distance by overlapping and fixing the second support plate 54 to the facing piece 66. In a positioned state, it can be connected via a connecting plate 56. Furthermore, since the opposing piece 66 has a size that is less than ¼ of the second support plate 54, something is sandwiched between the opposing piece 66 and the first support plate 52. Or the distance between the facing surfaces of the facing piece 66 and the first support plate 52 is changed from a predetermined size as much as possible. Or it can be suppressed. Thereby, the distance between the opposed surfaces 78a and 78b of the first support plate 52 and the second support plate 54 when the second support plate 54 is fixed to the facing piece 66 is surely designed. Can be.

  As a result, the distance between the opposing surfaces 78a and 78b of the first support plate 52 and the second support plate 54 connected via the connection plate 56 becomes smaller than the design dimension, and both the support plates 52, It can be advantageously prevented that the operation of positioning the first transmission gear 30 and the second transmission gear 32 between 54 is difficult. In addition, the distance between the support plates 52 and 54 is larger than the design dimension, and the opposing surfaces 78a and 78b of the first and second support plates 52 and 54 and the first and second transmission gears 30 and 32 are connected. It is possible to effectively avoid the occurrence of unnecessary play and gaps in the meantime.

  In this embodiment, before the first and second support plates 52 and 54 are connected to each other, the openings of the insertion holes 40 and 44 of the first and second transmission gears 30 and 32 are visually observed. The first support plate 52 and the second support plate 54 are connected to the connecting plate after the first and second rotary shafts 80 and 88 are inserted into the insertion holes 40 and 44 by an easy operation. By connecting via 56, the transmission gears 30 and 32 and the rotary shafts 80 and 88 can be easily assembled to the gear mounting bracket 26. In addition, the rotary shafts 80 and 88 are inserted into the insertion holes 40 and 44 of the transmission gears 30 and 32 by the opposing piece 66 integrally formed at a position where the second support plate 54 should be fixed with respect to the connecting plate 56. The work to be inserted inside is not hindered.

  Therefore, when the gear assembly bracket 26 of the present embodiment is used, the first transmission gear 30 and the second transmission gear 32, particularly the first support plate 52 and the first transmission gear 32, among the gear mechanisms 26, are used. The second support plate 54 is disposed between the first rotation shaft 80 and the rotation shaft 14b of the display case 10 in the insertion holes 40 and 46 of the transmission gears 30 and 32, respectively. The operation of inserting the two rotary shafts 88 is made easier, and the assembly of the transmission gears 30 and 32 can be effectively improved. Further, due to the presence of unnecessary gaps and backlash between the first and second support plates 50 and 54 and the first and second transmission gears 30 and 32, each transmission is rotated when the display case 10 is rotated. It is possible to effectively prevent the generation of noise between the gears 30 and 32 and the support plates 52 and 54.

  And in this embodiment, when the 1st support plate 52 and the 2nd support plate 54 are connected, based on the fastening force of a tapping screw, each protrusion 50b of the 2nd transmission gear 32 is easily deformed. By crushing the tip portion that is a part, the second transmission gear 32 is allowed to have a gap, play, or the like with respect to the first support plate 52 and the second support plate 54 in the outer flange portions 48a and 48b. Therefore, the contact position can be more reliably established. Thereby, the generation of noise between the transmission gears 30 and 32 and the support plates 52 and 54 when the display case 10 is rotated can be further effectively prevented.

  Further, in the present embodiment, the second transmission gear 32 rotated around the second rotation shaft 88 connected to the rotation shaft 14b of the display case 10 has the outer flange portions 48a, 48 at both ends in the axial direction. The protrusions 50a and 50b, which are integrally formed with each other, are brought into contact with the opposing surfaces 78a and 78b of the first and second support plates 52 and 54 at the front end surfaces with a sufficiently small area. Therefore, the sliding resistance generated between the second transmission gear 32 and the opposing surfaces 78a and 78b of the first and second support plates 52 and 54 when the display case 10 rotates is as small as possible. Can be done. Thereby, the display case 10 can be rotated more smoothly without applying an excessive load to the electric motor 20.

  The specific configuration of the present invention has been described in detail above. However, this is merely an example, and the present invention is not limited by the above description.

  For example, the number and shape (gear type) of the transmission gear to be assembled to the gear assembly bracket are not limited to those illustrated.

  Further, the fixing structure of the opposing piece 66 of the second support plate 54 is not particularly limited to the fastening structure using the tapping screw, and for example, the second support plate 54 using a known clamp member. Even if the opposing piece 66 is clamped or the opposing piece 66 of the second support plate 54 is bonded with a known adhesive or the like, there is no problem.

  Further, in the above description, the rotating shaft 14b of the display case 10 and the second rotating shaft 88 of the second transmission gear 32 are configured by separate shaft members independent of each other. And the rotation shaft of the transmission gear may be the same member.

  The shape and size of the facing piece are not limited to those illustrated. However, the opposing piece has a transmission gear on the axis of the rotation shaft when the rotation shaft is arranged so as to extend between the first and second support plates before the connection between the two support plates. It must be shaped so that it does not come into contact with the transmission gear even if it moves. Therefore, as illustrated, when the notch portions 70 and 72 are provided in the facing piece 66, if the notch portions 70 and 72 satisfy the above-described conditions, the number and shape of the notch portions 70 and 72 are Can also be changed as appropriate.

  Moreover, in the said embodiment, the 2nd transmission gear 32 rotated around the 2nd rotating shaft 88 which comprises a part of rotating shaft 14b of the display case 10 is the 1st support plate 52 and the 2nd support plate. Although it is arranged so as not to be movable in the axial direction between 54, it may be movable in the axial direction between the two support plates 52, 54. Even in this case, by adopting the structure according to the present invention, the effect of improving the assembly of the second transmission gear 32 to the gear mounting bracket 26 can be advantageously achieved.

  Furthermore, in the above-described embodiment, only the tip portion of the protrusion 50b integrally formed on one outer flange portion 48b of the two outer flange portions 48a and 48b which are opposed portions provided on the second transmission gear 32 is easily deformed. However, there is no problem even if the tip portion of the protrusion 50a integrally formed with the other outer flange portion 48a is an easily deformable portion. Moreover, you may provide an opposing part and protrusion also with respect to the 1st transmission gear 30. FIG.

  In the present invention, the opposing portion provided on the transmission gear and the protrusion formed integrally with the opposing portion are not essential, but when they are provided, the shape of the opposing portion and the protrusion The shape, number, and the like are not limited to the examples. For example, as the shape of the protrusion, in addition to the exemplified hemispherical shape or conical shape, a rib shape made of a thin flat plate, a column shape such as a cylinder or a prism, and the like can be adopted.

  In addition, in the above-described embodiment, the present invention is divided into a gear assembly bracket for assembling a transmission gear attached to a rotation shaft of an automotive display device, and a structure for assembling the transmission gear to a gear assembly bracket. Although the specific example of what was applied was shown, the present invention also includes a gear assembly bracket for assembling a transmission gear attached to a rotating shaft of an in-vehicle display device other than the automotive display device, and a gear assembly of the transmission gear. It goes without saying that the present invention is advantageously applied to any of the attachment structures to the attachment bracket.

  The specific configuration of the present invention has been described in detail above. However, this is merely an example, and the present invention can be implemented in various forms. Accordingly, various embodiments relating to various changes, modifications, and improvements of the present invention adopted based on the knowledge of those skilled in the art are all within the scope of the present invention without departing from the spirit of the present invention. It should be understood that it belongs.

It is explanatory drawing which shows the cross section of the display apparatus in which an example of the bracket for gear assembly which has a structure according to this invention was installed. It is a cross-sectional explanatory drawing which shows the bracket for gear assembly shown in FIG. 1 in the state which assembled | attached the transmission gear to it. It is a perspective explanatory view which shows the bracket for gear assembly shown in FIG. 1 in the state before attaching a transmission gear to it.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Display case 14 Rotating shaft 20 Electric motor 26 Gear mounting bracket 28 Drive gear 30 First transmission gear 32 Second transmission gear 40, 44 Insertion hole 50 Projection 52 First support plate 54 Second support plate 56 Connection Plate 66 Opposing piece 70 First notch portion 72 Second notch portion 76 Tapping screw 80 First rotating shaft 88 Second rotating shaft

Claims (3)

A transmission that is mounted on a rotating shaft of an in-vehicle display device that is arranged to be rotatable about one axis and meshes with a driving gear of the electric motor, thereby transmitting the rotational driving force of the electric motor to the rotating shaft. A bracket to which a gear is assembled, a first support plate and a second support plate that are arranged to face each other with a predetermined distance therebetween, and a connection plate that connects corresponding ends of the two support plates to each other And the transmission gear is disposed between the first support plate and the second support plate, while the pivot shaft is disposed between the first support plate and the second support plate. And is inserted through an axially extending insertion hole provided in the transmission gear that extends between the first and second support plates and is positioned between the two support plates. In this state, the rotating shaft is connected to the first support plate and the second support plate. By being fixed to at least one of them, the transmission gear is assembled by being attached to the rotating shaft supported by the first and second support plates. In what is configured as follows,
The first support plate and the second support plate are made of separate independent plate materials, while the connecting plate is integrally formed at the end of the first support plate, and the connecting plate A flat plate-like facing piece that is opposed to the first support plate and is smaller than the second support plate is integrally formed at the end of the second support plate opposite to the first support plate, The support plate is superimposed on the surface of the opposing piece opposite to the surface facing the first support plate, and is fixed to the opposing piece, whereby the first support plate and the second support plate are fixed. The support plates are connected to each other via the connecting plate in a state of being opposed to each other with a predetermined distance therebetween, and the rotating shaft is between the first and second support plates. Even if the transmission gear moves on the axis of the rotating shaft when it is arranged so as to extend across the support plate before the two support plates are connected, So as not to contact the transmission gear, bracket gear assembly, characterized in that the shape of the facing plates is set. A structure for assembling the transmission gear with respect to the gear mounting bracket according to claim 1,
Under the state in which the transmission gear is disposed between the first support plate and the second support plate, opposing portions facing the respective support plates are disposed at both ends in the axial direction of the transmission gear. Providing each of the opposing portions with a protrusion having an end surface smaller than the area of the opposing portions of the opposing portions facing the first and second support plates, the transmission gear, In contact with the respective opposing surfaces of the first support plate and the second support plate at the tip surfaces of the projections of the opposing portions provided at the ends on both axial sides of the transmission gear, A gear assembly structure, wherein the gear assembly structure is disposed between the first and second support plates and is assembled to the gear assembly bracket. The transmission gear is in contact with the opposing surfaces of the first support plate and the second support plate at the tip surfaces of the protrusions of the opposing portions provided at the ends on both sides in the axial direction. Under the pressure means for clamping the transmission gear between the first support plate and the second support plate, the transmission gear is clamped between the first and second support plates. The gear set according to claim 2, wherein at least a tip portion of the projection is an easily deformable portion that is easily deformed by being pressed on the basis of a clamping pressure by the clamping means. Attached structure.

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