Transmission device

Abstract

The utility model provides a transmission device capable of easily assembling and disassembling a driven part. A transmission device (1) is provided with: a driven member (30) having a pair of first gears (22, 22) arranged so as to face away from each other on an axis (x1); and a drive mechanism (10) that has a pair of second gears (33, 33) that are disposed so as to face each other on the axis line (x1) and detachably engage with the pair of first gears (22, 22), respectively, and that rotates the driven member (30) about the axis line (x1) by rotating the second gears (33) about the axis line (x1).

Description

Technical Field

[0001] The utility model relates to a transmission device. Background Art

[0002] For example, there is a known drive mechanism for driving a dipping basket immersed in a dipping liquid contained in a dipping tank. In the drive mechanism, the dipping basket supported at the ends of a pair of arms so as to be rotatable about an axis is driven by a gear transmission mechanism to rotate about the axis. Summary of the Utility Model

[0003] Problems to be Solved by the Utility Model

[0004] When the gear transmission mechanism fails or when the dipping basket is cleaned, it is necessary to remove the dipping basket from the gear transmission mechanism. However, since the dipping basket is integrally coupled to the pair of arms in a non-detachable manner, removal takes a lot of time.

[0005] The present utility model has been made in view of the above problems, and an object thereof is to provide a transmission device capable of easily attaching and detaching a driven member.

[0006] Means for Solving the Problems

[0007] To achieve the above object, the transmission device according to the present utility model includes: a driven member having a pair of first gears arranged on the axis so as to face away from each other; and a drive mechanism having a pair of second gears arranged opposite to each other on the axis and respectively meshing with the pair of first gears in a detachable manner, and rotating the driven member about the axis by rotating the second gears about the axis.

[0008] The pair of first gears are concave bevel gears recessed in a direction approaching each other along the axis.

[0009] The pair of second gears are convex bevel gears protruding in a direction approaching each other along the axis.

[0010] The pair of second gears are configured to be movable along the axis.

[0011] The driven member is a dipping basket configured to be immersed in a dipping tank.

[0012] Effects of the Utility Model

[0013] According to the present utility model, it is possible to provide a transmission device capable of easily attaching and detaching a driven member. Brief Description of the Drawings

[0014] Figure 1 It is a side view schematically showing the structure of a transmission device 1 according to an embodiment of the present utility model.

[0015] Figure 2 is a partial enlarged sectional view along the axis x1 at the front end of the support arm 15.

[0016] Figure 3 is another partial enlarged sectional view along the axis x1 at the front end of the support arm 15.

[0017] Figure 4 is a partial enlarged perspective view of the side wall portion 31 showing the structure of the first gear 33 in a specific example schematically.

[0018] Figure 5 is a partial enlarged side view of the side wall portion 31 showing the structure of the first gear 33 in a specific example schematically.

[0019] Figure 6 is a perspective view showing the structure of the gear unit 20 in a specific example schematically.

[0020] Figure 7 is a partial enlarged side view showing the structure of the gear unit 20 in a specific example schematically.

[0021] Figure 8 is a side view of the transmission device 1 for explaining the usage mode of the transmission device 1 in an embodiment of the present invention. Detailed Embodiment

[0022] Hereinafter, embodiments of the present invention will be described with reference to the drawings. Figure 1 is a side view schematically showing the structure of the transmission device 1 in an embodiment of the present invention. As Figure 1 shown, the transmission device 1 includes a drive mechanism 10 and a driven member, i.e., the impregnation basket 30, which is connected to the drive mechanism 10 so as to be rotatable about the axis x1. The transmission device 1 is configured to be able to perform at least an impregnation action of immersing the impregnation basket 30 in an impregnation tank (not shown) and a rotation action of rotating the impregnation basket 30 about the axis x1.

[0023] In the transmission device 1, an x-axis extending in the horizontal direction, a y-axis extending in the horizontal direction and orthogonal to the x-axis, and a z-axis extending in the vertical direction and orthogonal to both the x-axis and the y-axis are defined, for example. The plane including the x-axis and the y-axis is a horizontal plane. In addition, in this example, the z-axis is defined as the vertical direction. That is, the plane including the x-axis and the z-axis and the plane including the y-axis and the z-axis are vertical planes. In this example, the axis x1 is in the direction along the x-axis (hereinafter, referred to as "x-axis direction").

[0024] The drive mechanism 10 includes: a mechanism main body 11; a support portion 12 that is coupled to the mechanism main body 11 to support the impregnation basket 30; and a drive portion 13 that rotationally drives the impregnation basket 30 about the axis x1. In this example, the drive mechanism 10 is configured to be movable, while holding the impregnation basket 30, in the x-axis direction, in the axial direction (hereinafter referred to as the "y-axis direction"), and in the z-axis direction (hereinafter referred to as the "z-axis direction"), for example. That is, the impregnation basket 30 can be freely moved in a three-dimensional space by various combinations of the x-axis direction, the y-axis direction, and the z-axis direction.

[0025] In this example, the support portion 12 includes: a base portion 14 that is disposed adjacent to the mechanism main body 11 in the x-axis direction; and a pair of support arms 15, 15 that extend downward from the base portion 14 in the z-axis direction. A pair of drive sources 16 that are respectively coupled to the support arms 15 are disposed on the base portion 14. Each drive source 16 generates a driving force that causes the support arm 15 to relatively move with respect to the base portion 14 between a first position and a second position in the x-axis direction. The drive source 16 is, for example, a motor including a stepping motor or the like.

[0026] For example, in the first position, the distance between the pair of support arms 15, 15 in the x-axis direction is the smallest. When the support arms 15, 15 are disposed in the first position, as Figure 1 shown, the impregnation basket 30 is supported by the support portion 12 between the support arms 15, 15. On the other hand, in the second position, the distance between the pair of support arms 15, 15 in the x-axis direction is the largest. When the support arms 15, 15 are disposed in the second position, the impregnation basket 30 is not supported by the support portion 12 between the support arms 15, 15.

[0027] The drive portion 13 includes, for example, a drive source (not shown) assembled in the mechanism main body 11, a shaft 17 that rotates about an axis x2 parallel to the axis x1, a pulley 18 that rotates about the axis x1, and a transmission member, i.e., a chain 19, that transmits the rotation of the shaft 17 about the axis x2 to the pulley 18. The drive source is, for example, a motor. The pulley 18 is disposed adjacent to the front end of one of the support arms 15. The chain 19 is, for example, a roller chain formed of a metal material. However, as the transmission member, a belt formed of a resin material, for example, may be used instead of the chain 19.

[0028] The entire impregnation basket 30 is formed in a cylindrical shape with the axis x1 as the central axis. In one example, the impregnation basket 30 includes: a pair of disk-shaped side wall portions 31, 31 centered on the axis x1; and a cylindrical main body portion 32 centered on the axis x1 between the side wall portions 31, 31. The main body portion 32 is formed of a mesh-like member, for example. A cylindrical accommodation space is defined in the impregnation basket 30 by the side wall portions 31, 31 and the main body portion 32. The accommodation space can be opened, for example, by an openable lid (not shown) formed in the main body portion 32.

[0029] Figure 2 is a partially enlarged sectional view along the axis x1 of the front end of a support arm 15. Figure 3 is another partially enlarged sectional view along the axis x1 of the front end of a support arm 15. Figure 2 and Figure 3 schematically shows a structure in which a pair of support arms 15, 15 support an impregnation basket 30. Referring to Figures 1 to 3 together, on each outer surface of side wall portions 31, 31 of the impregnation basket 30, a pair of first gears 33, 33 are formed which are arranged to face away from each other on the axis x1. In this example, each first gear 33 is formed within a cylindrical protrusion 34 protruding from the outer surface of the side wall portion 31. In addition, details of the first gear 33 will be described later.

[0030] On the other hand, cylindrical tip portions 15a are formed at the front ends of the pair of support arms 15, 15 respectively. At each tip portion 15a, both ends along the axis x1 are open. Gear members 20 are respectively supported at the tip portions 15a of the pair of support arms 15. Each gear member 20 is supported by one or more annular bearings 21 joined, for example, by press-fitting into the tip portion 15a. The bearing 21 is, for example, a ball bearing. The outer peripheral surface of the gear member 20 is fixed, for example, by press-fitting to the inner peripheral surface of one or more bearings 21. Thus, the gear member 20 is supported so as to be able to rotate about the axis x1 relative to the tip portion 15a of each support arm 15.

[0031] As Figure 1 and Figure 2 shown, in one gear member 20 supported by one support arm 15, one end in the x-axis direction, that is, the outer end, protrudes outward from the tip portion 15a. The outward protruding outer end of this gear member 20 is connected to a belt pulley 18. The belt pulley 18 is formed, for example, in an annular shape with the axis x1 as the central axis. In this example, the gear member 20 is connected to the belt pulley 18 in a non-rotatable manner about the axis x1. Thus, the rotation of the shaft 17 about the axis x2 is transmitted to the belt pulley 18 through the chain 19, whereby the gear member 20 rotates about the axis x1.

[0032] On the other hand, as Figure 1 and Figure 3 shown, in another gear member 20 supported by the other support arm 15, one end in the x-axis direction, that is, the outer end, does not protrude outward from the tip portion 15a. In addition, components such as a belt pulley and a chain for transmitting the rotation of the shaft 17 of the drive source are not connected to the other gear member 20. Therefore, the other gear member 20 can rotate freely relative to the tip portion 15a about its axis x1.

[0033] Referring to Figures 1 to 3, the other end of each gear member 20 in the x-axis direction, i.e., the inner end, protrudes inward from the top end portion 15a. A second gear 22 is formed at the inner end of each gear member 20. In a pair of gear members 20, the second gears 22 are arranged opposite to each other on the axis x1. At the first position where the distance in the x-axis direction between the pair of support arms 15, 15 is the smallest, as Figure 2 and Figure 3 shown, a pair of second gears 22, 22 are respectively engaged with a pair of first gears 33, 33 in the x-axis direction.

[0034] Figure 4 is a partial enlarged perspective view of the side wall portion 31 schematically showing the structure of a first gear 33 in a specific example. Figure 5 is a partial enlarged side view of the side wall portion 31 schematically showing the structure of a first gear 33 in a specific example. As Figure 4 and Figure 5 shown, in the side wall portion 31, a plurality of openings 35 communicating the accommodation space with the external space are formed in the area around the protruding portion 34. The mesh of the main body portion 32 of the impregnation basket 30 and the plurality of openings 35 of the side wall portion 31 can allow the impregnation liquid in the impregnation tank to enter the impregnation basket 30 and then discharge from the impregnation basket 30.

[0035] The first gear 33 is a bevel gear with a concave shape formed along the axis x1 toward the accommodation space at the protruding portion 34. Specifically, the first gear 33 is formed in a frustum shape with the axis x1 as the central axis. The first gear 33 is a so-called straight bevel gear. That is, the tooth profile of the first gear 33 is formed in a straight line shape. In the entire impregnation basket 30, a pair of first gears 33, 33 are formed in a concave shape along the axis x1 toward each other.

[0036] Figure 6 is a perspective view schematically showing the structure of a gear member 20 in a specific example. Figure 7 is a partial enlarged side view schematically showing the structure of a gear member 20 in a specific example. Referring together to Figure 6 and Figure 7 , a gear member 20 supported by the top end portion 15a of one support arm 15 has a base end portion 20a, an intermediate portion 20b, and a top end portion 20c along the axis x1. The base end portion 20a, the intermediate portion 20b, and the top end portion 20c are all formed in a cylindrical shape. In this example, the diameter of the gear member 20 orthogonal to the axis x1 increases as it goes from the base end portion 20a toward the top end portion 20c. A second gear 22 is formed at the front end of the top end portion 20c.

[0037] A groove portion 20d extending from the base end to the front end of the base end portion 20a is formed on the outer peripheral surface of the base end portion 20a. As Figure 2As shown, the gear member 20 is connected to the pulley 18 at the base end portion 20a. At this time, the groove portion 20d of the base end portion 20a receives the protrusion 18a that protrudes inward from the inner peripheral surface of the pulley 18. The protrusion 18a has a shape corresponding to the groove portion 20d. In this way, by fitting the protrusion 18a into the groove portion 20d, the gear member 20 is connected to the pulley 18 in a manner that it cannot rotate relative to the axis x1.

[0038] On the other hand, as Figure 3 shown, in another gear member 20 supported by the tip portion 15a of another support arm 15, the base end portion 20a is omitted. That is, the other gear member 20 has an intermediate portion 20b, a tip portion 20c, and a second gear 22. One and the other gear members 20 are supported on the inner peripheral surface of the bearing 21, for example, by press-fitting or the like on the outer peripheral surface of the intermediate portion 20b. In addition, in one and the other gear members 20, at least a part of the tip portion 20c protrudes inward.

[0039] The second gear 22 is a convex bevel gear formed to protrude toward the impregnation basket 30 along the axis x1. Specifically, the second gear 22 is formed in a frustum shape with the axis x1 as the central axis. The second gear 22 is a so-called straight bevel gear. That is, the tooth profile of the second gear 22 is formed in a straight line shape. In the entire drive mechanism 10, a pair of second gears 22, 22 are formed in a convex shape protruding in a direction approaching each other along the axis x1. A predetermined meshing clearance is formed between the first gear 33 and the second gear 22.

[0040] In the drive unit 13, the shaft 17 and the pulley 18 are formed of a metal material, for example. On the other hand, the gear member 20 is formed of a resin material containing a metal material, nylon, etc., for example. In addition, in the impregnation basket 30, each side wall portion 31 is formed of a single metal plate, for example. On the other hand, the main body portion 32 is formed of a net-like member formed of a metal material. However, the side wall portion 31 and the main body portion 32 may also be formed of a resin material.

[0041] Next, the case where the impregnation basket 30 is mounted on the drive mechanism 10 in the transmission device 1 will be described. Figure 8 is a side view of the transmission device 1 for explaining the usage mode of the transmission device 1. In the drive mechanism 10, the pair of support arms 15, 15 are positioned at the second position by the operation of the drive source 16. That is, the distance between the pair of support arms 15, 15 in the x-axis direction is the largest. Both pairs of second gears 33, 33 are disengaged from the first gears 22, 22. That is, the second gears 33, 33 do not mesh with the first gears 22, 22.

[0042] In the accommodation space of the dipping basket 30, a plurality of intermediate products (articles) including a reinforcing ring that constitutes a sealing device such as an annular oil seal are accommodated. The reinforcing ring is formed of a metal material, for example. For example, articles may also be introduced into the dipping basket 30 at a position different from the transmission device 1. In Figure 8 , the dipping basket 30 is disposed between a pair of support arms 15, 15. The first gears 33, 33 of the dipping basket 30 and the second gears 22, 22 of the gear members 20, 20 are arranged along the axis x1.

[0043] When the axis of the second gear 33 coincides with the axis x1 of the first gear 22, by the operation of the drive source 16 on the base 14, the pair of support arms 15 are driven toward the first position. The pair of support arms 15, 15 move toward the first position in a manner approaching each other. When the pair of support arms 15, 15 reach the first position, the second gears 33, 33 engage with the first gears 22, 22. Thus, the dipping basket 30 is mounted on the drive mechanism 10.

[0044] In this state, the drive mechanism 10 transports the dipping basket 30 to a dipping tank of a dipping treatment device (not shown). By the operation of the drive mechanism 10, the dipping basket 30 is dipped in the dipping liquid in the dipping tank. The dipping liquid is an adhesive applied to a reinforcing ring formed of a metal material, for example. By the operation of the drive mechanism 10, the dipping basket 30 rotates about the axis x1 in the dipping liquid in the dipping tank. Specifically, the rotation of a motor as a drive source in the mechanism main body 11 is transmitted to one second gear 33 via the shaft 17, the chain 19, and the pulley 18.

[0045] Thus, by rotating one second gear 33, the second gear 22, that is, the dipping basket 30 rotates about the axis x1. By the rotation of the dipping basket 30, the plurality of reinforcing rings are stirred in the accommodation space of the dipping basket 30. As a result, the adhesive is uniformly coated on the surface of the reinforcing ring. After a predetermined time, the rotation of the dipping basket 30 about the axis x1 stops. Then, by the operation of the drive mechanism 10, the dipping basket 30 is lifted from the dipping tank. The reinforcing rings in the dipping basket 30 are subjected to drying treatment, baking treatment, cooling treatment, etc. Thus, the adhesive is coated on the reinforcing ring. In addition, thereafter, a rubber material is formed on the reinforcing ring by vulcanization molding, thereby manufacturing a sealing device.

[0046] According to the transmission device 1 as described above, with respect to a pair of first gears 22, 22 disposed back to back with each other on the axis x1, a pair of second gears 33, 33 disposed opposite to each other on the axis x1 engage with each other detachably along the axis x1, whereby the dipping basket 30 is supported by the support arms 15, 15. Thus, in the transmission device 1, it is configured to be able to easily load and unload the dipping basket 30 as a driven component. Therefore, the dipping basket 30 can be easily transported not only with respect to the dipping tank but also with respect to other processing stations.

[0047] In addition, the first gears 22, 22 are concave bevel gears that are recessed in the direction of approaching each other along the axis x1, and the second gears 33, 33 are convex bevel gears that protrude in the direction of approaching each other along the axis x1. According to such a structure, the convex second gears 33, 33 can be reliably engaged with the concave first gears 22, 22. Therefore, the rotation of the second gear 33 of the gear member 20 supported by one support arm 15 is reliably transmitted to the first gear 22. As a result, it is possible to prevent the first gear 22, that is, the dipping basket 30, from sliding and idling, etc.

[0048] In the transmission device 1 as described above, the rotation of the dipping basket 30 about the axis x1 is achieved by the rotation of one gear member 20 rotatably supported by one support arm 15, but it is also possible to drive the rotation of the pair of second gears 33 of the pair of gear members 20. In this case, the pair of gear members 20 have the same structure. In addition, in the drive unit 13 of the drive mechanism 10, the rotation of the shaft 17 of the drive source is transmitted to the other gear member 20 via a transmission member such as a chain.

[0049] As described above, the present utility model has been described by the above embodiments, but the technical scope of the present utility model is not limited to the scope described in the above embodiments. For those skilled in the art, it is obvious that various changes or improvements can be made to the above embodiments. According to the description of the claims, the embodiments with such changes or improvements are also included in the technical scope of the present utility model.

[0050] The embodiments described above are for easy understanding of the present utility model and are not used to limit or interpret the present utility model. In addition, the above embodiments do not limit the objects to which this solution is applied, and this solution can include all solutions as its application objects. The components, their configurations, materials, conditions, shapes, sizes, etc. included in the above embodiments are not limited to the illustrated contents and can be appropriately changed. For example, the present utility model includes the differences generated in the implementation of manufacturing tolerances, etc. In addition, within the scope of no technical contradiction, the components shown in different embodiments can be partially replaced or combined with each other. In addition, the various structures can be appropriately selectively combined to achieve at least part of the above problems and effects.

[0051] Description of reference numerals:

[0052] 1 Transmission device, 10 Driving mechanism, 11 Mechanism main body, 12 Support part, 13 Driving part, 14 Base part, 15 Support arm, 15a Top part, 16 Driving source, 17 Shaft, 18 Pulley, 18a Protrusion, 19 Chain, 20 Gear component, 20a Base end part, 20b Intermediate part, 20c Top end part, 20d Groove part, 21 Bearing, 31 Side wall part, 32 Main body part, 33 Gear, 34 Protrusion part, 35 Opening part, x1 Axis line, x2 Axis line.

Claims

1. A transmission device, characterized in that: include: The driven component has a pair of first gears disposed opposite to each other on the axis; The drive mechanism includes a pair of second gears disposed opposite to each other on the axis and detachably meshed with the pair of first gears, and the driven member is rotated about the axis by rotating the second gears about the axis.

2. The transmission device according to claim 1, characterized in that: The pair of first gears are concave bevel gears that are concave in directions approaching each other along the axis.

3. The transmission device according to claim 2, characterized in that: The pair of second gears are convex bevel gears that protrude in directions approaching each other along the axis.

4. The transmission device according to claim 1, characterized in that: The pair of second gears is configured to be movable along the axis.

5. The transmission device according to any one of claims 1 to 4, characterized in that: The driven member is a dipping basket configured to be immersed in a dipping tank.

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