TW201335517A - Conveying device - Google Patents

Abstract

The present invention provides a conveying device that is hard to generate leakage of lubricant even after a long period of time. The present invention provides a conveying device (12) that includes a conveying means (16) equipped with a drive shaft (14) and a gear motor (18) for driving the drive shaft (14), wherein the gear motor (18) includes an output shaft (58) coaxially coupled to the drive shaft (14), bearings (62, 64) supporting the output shaft (58), seals (80) arranged at axial outer sides of the bearings (62, 64) and packaging between the output shaft (58) and housings (50) supporting the bearings (62 , 64). The seals (80) have a single outer annular portion (82), support portions (83, 84) protruding from the outer annular portion (82) toward the inner peripheral side, and two main lips (86, 88) formed on front ends of the support portions (83, 84). The two main lips (86, 88) have springs (90, 91) for exerting forces of the main lips (86, 88) to the output shaft (58).

Description

Conveyor

A delivery device of the invention.

Patent Document 1 discloses a conveyor (conveying device) including a conveying mechanism provided with a drive shaft and a gear motor that drives the drive shaft, and the conveyed object passes through the drive shaft.

In the conveyor belt of Patent Document 1, the output shaft of the gear motor is a hollow output shaft having a hollow portion, and a sleeve (shaft member) coaxially coupled to the drive shaft is inserted into a hollow portion of the hollow output shaft, and a transmission key is Or a frictional coupling means joining the hollow output shaft to the inserted sleeve.

That is, the gear motor is not mounted to a specific fixture, but is mounted such that its entirety directly spans (covers) the sleeve that is coaxially coupled to the drive shaft. However, if the output shaft of the gear motor is rotated in this state, the housing of the gear motor is rotated by the reaction (not the drive shaft of the transport mechanism). Therefore, the member of the gear motor is generally coupled by a member called a torque arm. a fixing member on the body and the conveying mechanism side.

This mounting aspect is widely used in a conveyor such as a conveyor belt because of the simple connection structure of the gear motor and the drive shaft of the conveying mechanism. The conveying material passes over the rotating drive shaft or through the conveying belt wound around the drive shaft.

(previous technical literature) (Patent Literature)

Patent Document 1: Japanese Laid-Open Patent Publication No. 2006-118573

In such a conveying device, vibration and thrust load from the conveying mechanism are easily transmitted to the gear motor, and therefore, the packaging performance of the lubricant of the gear motor reducer is particularly impaired, in particular, the sealing performance of the lubricant near the output shaft is impaired. problem.

The present invention has been made to solve such a problem, and a problem is to obtain a conveying device which is less likely to cause lubricant leakage over a long period of time.

The present invention is directed to a transport device including a transport mechanism including a drive shaft and a gear motor that drives the drive shaft, and the above-described problem is solved by providing a gear motor having an output coaxially coupled to the drive shaft. a shaft, a bearing supporting the output shaft, and an oil seal disposed between the axially outer side of the bearing and enclosing the output shaft and a member supporting the bearing, the oil seal having a single outer annular portion and being inward from the outer annular portion a support portion protruding on the side of the circumference and two main lip portions provided at the front end of the support portion, and the two main lip portions have a biasing means for biasing the main lip portion to the output shaft.

It is considered that in such a conveying device, when the drive shaft of the conveying mechanism is moved in the axial direction, for example, the output shaft of the speed reducer is moved in the axial direction, it is easy to make it Sliding in the axial direction relative to the oil seal is the cause of early deterioration.

In the present invention, as the oil seal, an oil seal having a single outer annular portion, a support portion projecting from the outer annular portion toward the inner peripheral side, and two main lip portions provided at the front end of the support portion are used. Further, in the present invention, the main lip means a lip which exhibits a main encapsulating function in the oil seal. Usually the largest lip forms the main lip. That is, having two main lips means having two lips that perform the same (primary) packaging function.

The two main lips respectively have means for applying force to the main lip to the output shaft. Therefore, as the oil seal of the gear motor for the conveying device, the sealing ability of the oil seal of the present invention is very high. Further, since there are one outer annular portion, it is possible to mount the drive shaft of the transport mechanism and the output shaft of the reducer in the axial direction with respect to the support member (housing, etc.) of the gear motor. When moving, the oil seal will not move with it (high rigidity of assembly). As a result, it is possible to maintain a high packaging capability for a long period of time.

According to the present invention, it is possible to obtain a conveying device which is less likely to cause lubricant leakage over a long period of time.

Hereinafter, an example of an embodiment of the present invention will be described in detail with reference to the drawings.

Fig. 1 is a plan view showing a conveying apparatus of an example of an embodiment of the present invention and including a partially enlarged cross section, and Fig. 2 is a main part of the conveying apparatus. View, Fig. 3 is an enlarged cross-sectional view of the main part of Fig. 1.

The conveying device 12 includes a conveying mechanism 16 provided with a drive shaft 14 and a gear motor 18 that drives the drive shaft 14. A drive wheel 22 is fixed to the drive shaft 14 via a key 20. Although not shown, a driven wheel is provided on the right side of the paper surface of FIGS. 1 and 2, and a conveying belt 24 is wound around the driving wheel 22 and the driven wheel.

Further, as shown in Fig. 2, the conveyed objects P1, P2, ... are placed on the conveyance belt 24 and conveyed. As also described in Fig. 2, the conveyed objects P1, P2, ... are not necessarily configured to be placed "directly above (i.e., on the symbol axis C1)", even if the drive shaft 14 is as in the present embodiment. The conveyance belt 24 is wound up, and the conveyances P1, P2, ... are placed on the conveyance belt 24, and are also included in the concept of "the conveyance passes on the drive shaft" in the present invention. The drive shaft 14 is rotatably supported by a holder (fixing member) 30 (a member 30A fixed to the holder 30) of the conveying mechanism 16 via bearings 25 and 26.

The gear motor 18 is coupled to the holder 30 of the transport mechanism 16 via a torque arm coupling mechanism 32 (described later).

The structure of the gear motor 18 will be described below.

The gear motor 18 is formed by integrating the motor 34 and the speed reducer 36.

A front hypoid pinion 38 is formed at the front end of the motor shaft 34A of the motor 34. The hypoid pinion 38 meshes with the hypoid gear 40. The hypoid gear 40 is fixed to the intermediate shaft 42 via a key 44. The intermediate shaft 42 is rotatably supported by a casing main body 50A of the casing 50 of the reduction gear 36 (of the gear motor 18) via a pair of bearings 46 and 48. In addition, the housing 50 is passed through The case body 50A and the case cover 50B are joined by the bolt 51 (not shown in the drawings, and the same reference numeral 51 is used to replace the bolt hole in the second figure).

A spur gear 54 is fixed to the intermediate shaft 42 via a key 52. The spur gear 54 meshes with the output gear 56. The output gear 56 is fixed to the output shaft 58 via a key 60.

In this embodiment, the output shaft 58 is a hollow output shaft having a hollow portion 58A. A key groove 58B extending over the entire length of the output shaft 58 is formed on the inner circumference of the output shaft 58. On the other hand, the key groove 14A is also formed on the side of the drive shaft 14 (shown in a staggered phase). The output shaft 58 is coupled to the drive shaft 14 in a coaxially torque-transmittable manner via a key 57 that spans between the keyway 58B and the keyway 14A. The output shaft 58 is rotatably supported by a casing 50 (a main body 50A and a cover 50B: a member supporting the bearing) of the reduction gear 36 via a pair of bearings 62 and 64.

In this embodiment, an open type bearing (not a so-called sealed bearing having a sealing member) which does not have a sealing member is used as the bearings 62 and 64. The load side bearing 62 has an outer ring 62A that abuts against the step portion 50A1 formed in the casing body 50A. Further, the inner ring 62B of the load side bearing 62 abuts against the output gear 56, and the output gear 56 abuts against the step portion 58C formed on the output shaft 58.

On the other hand, the outer ring 64A of the counter load side bearing 64 abuts against the step portion 50B1 provided in the case cover 50B, and the inner ring 64B abuts against the projection 58D provided on the output shaft 58.

One end of the output shaft 58 abuts against the step portion 14D of the drive shaft 14. Thus, the screw 70 is screwed into the screw hole 14S of the drive shaft 14 through the cover 66 that abuts against the end 58E of the output shaft 58 to interface between the end surface 14C of the drive shaft 14 and the cover 66. The distance L1 is shortened, so that the drive shaft 14 and the output shaft 58 can be firmly fixed in the axial direction.

As described above, in this embodiment, the gear motor 18 is coupled to the holder (fixing member) 30 of the transport mechanism 16 via the torque arm coupling mechanism 32.

When the gear motor 18 of the drive shaft 14 of the transport mechanism 12 is coaxially mounted, once the motor shaft 34A is directly rotated, (not the drive shaft 14 of the transport mechanism 16 rotates), the entire gear motor 18 is driven by the reaction. The circumference of the shaft 14 rotates. The torque arm coupling mechanism 32 is used for the purpose of connecting the housing 50 of the gear motor 18 and the holder 30 of the transport mechanism 16 in order to prevent this phenomenon.

In this embodiment, the torque arm coupling mechanism 32 is formed by the torque arm 72 and the main body 50A of the housing 50 (the main body 50A) of the reduction gear 36 for fastening and fixing the torque arm 72 to the gear motor 18 in common. A bolt (only the bolt hole is shown) 51, a bolt 74 for fixing the torque arm 72 to the holder 30 of the transport mechanism 16, a nut 75, and a spacer 76 are provided.

Specifically, the torque arm 72 of this embodiment as shown in FIGS. 1 to 3 has a substantially triangular shape when viewed from the front, and is bent into a key shape in plan view to align the connection with the gear motor 18. The distance 72 between the surface 72A and the connecting surface 72B of the holder 30. Thereby, it can be contacted with both the fixing surface 30B of the fixing frame 30 of the conveyance mechanism 16, and the fixing surface 50A2 of the case main body 50A.

As is clear from FIGS. 1 and 3, in the embodiment, the connection surface 72A of the torque arm 72 on the casing 50 side is in direct contact with the fixing surface 50A2 of the casing main body 50A. Further, the coupling surface 72B of the torque arm 72 on the fixing frame 30 side is in direct contact with the fixing surface 30B of the fixing frame 30 of the conveying mechanism 16. Further, the torque arm 72 is firmly fixed to the housing 50 and the fixing frame 30 by the through bolt 51 , the bolt 74 , the nut 75 , and the spacer 76 (the torque arm 72 and the fixing bracket 30 , the torque arm 72 , and the housing 50 ) They are all fixed so that they cannot move relative to each other in the axial direction). In other words, the gear motor 18 transmits the torque arm coupling mechanism 32 capable of fixing the fixing frame (fixing member) 30 of the conveying mechanism 16 and the housing 50 of the gear motor 18 so as not to be axially movable (actually impossible to axially Moving) is fixed to the holder 30 of the transport mechanism 16.

As described above, in the transport device 12, the connection mechanism using the torque arm 72 is a necessary component for preventing the phenomenon that the gear motor 18 itself rotates. However, as in the connection example, if the transport mechanism 16 is used The housing 50 of the holder 30 and the gear motor 18 cannot be sufficiently fixed (not slightly displaceable), and the output shaft 58 of the reduction gear 36 is moved in the axial direction by the drive shaft 14 of the conveying mechanism 16. When moving in the axial direction, (since the housing 50 of the gear motor 18 as a whole cannot move following the movement of the output shaft 58), the slight displacement has to be absorbed only by the relative movement between the housing 50 and the output shaft 58. Therefore, as described above, the connection state of the torque arm 72 is actually not preferable. The connection of the torque arm 72 is preferably such that the housing 50 of the gear motor 18 can be slightly displaced in the axial direction with respect to the holder 30 of the transport mechanism 16, and it is preferable to have a slight play in the axial direction. That is, even if it is the torque as in this embodiment When the arm connecting mechanism 32 is actually coupled by the torque arm connecting mechanism 32, it is preferable to stop the nut 75 without being fastened to the bottom.

However, the mounting of the torque arm coupling mechanism 32 usually has to be performed on site due to the positional relationship with the fixing frame 30 of the transport mechanism 16, and may be trusted by the user. Moreover, in reality, it often occurs that even if the manufacturer performs the mounting, in the subsequent inspection by the user, the housing 50 that is coupled to the gear motor 18 by fastening the nut 75 to the last transmission torque arm 72 cannot be fixed relative to the holder 30. Axial movement.

According to the verification by the inventors, such problems as the leakage of the lubricant of the conveying device 12 are particularly likely to occur in such a situation. From another point of view, the present invention can be referred to as: the axial vibration or relative movement between the housing 50 and the output shaft 58 of the gear motor 18 can be understood as being possible to use in such a manner. When it is used in such a manner, in the case of using such a state, in order to prevent the occurrence of a problem such as leakage of the lubricant, the invention of "the oil seal of the structure which is specific to the case of the conveying device" is employed.

In this embodiment, the oil seals 80 and 81 disposed between the output shaft 58 and the casing 50 have an outer side annular portion 82 provided on the outer side in the axial direction of the bearings 62 and 64, and are provided in a ring shape from the outer side. The portion 82 of the support portions 83 and 84 projecting toward the inner peripheral side is composed of two first main lip portions 86 and a second main lip portion 88 made of synthetic rubber. Further, the oil seal 81 on the load side is the same member as the oil seal 80 on the counter load side, and is attached only to the axial direction.

The oil seal 80 focusing on the counter load side will be described, although the oil seal 80 is The first main lip portion 86 and the second main lip portion 88 are provided, but the metal outer annular portion 82 is "one", and the member called the oil seal 80 is one member at the beginning.

The first main lip portion 86 and the second main lip portion 88 of the oil seal 80 play a major role in the encapsulation function of the oil seal 80. Both the first main lip portion 86 and the second main lip portion 88 are arranged in the same direction with respect to the bearings 62 and 64, that is, the package oil is well sealed from the inside of the reduction gear 36 to the outside of the reduction gear 36, and each of them They all have exactly the same shape. Further, each of the first main lip portion 86 and the second main lip portion 88 has the same spring (urging means) 90 for biasing the first main lip portion 86 and the second main lip portion 88 to the output shaft 58. 91. The first auxiliary lip portion 92 is provided on the counter load side of the first main lip portion 86, and the second sub-lip portion 94 similar to the first sub-lip portion 92 is provided on the counter load side of the second main lip portion 88. That is, the oil seal 80 is in contact with the output shaft 58 at a total of four places.

Next, the action of the transport device 12 will be described.

When the motor shaft 34A of the motor 34 rotates, the hypoid pinion 38 formed at the front end of the motor shaft 34A also integrally rotates. As a result, the hypoid gear 40 meshing with the hypoid pinion 38 rotates, and the spur gear 54 and the output gear 56 rotate through the intermediate shaft 42 to rotate the output shaft 58 in which the output gear 56 is assembled. In the gear motor 18, since the housing 50 (the housing main body 50A) of the reduction gear 36 is coupled to the holder 30 of the conveying mechanism 16 through the torque arm 72, the conveying mechanism is rotated once the output shaft 58 of the reduction gear 36 is rotated. The drive shaft 14 of the 16 rotates integrally with the output shaft 58. Thereby, the driving wheel coupled to the drive shaft 14 through the key 20 22 rotates, and the conveying belt 24 wound around the driving wheel 22 also rotates cyclically. As a result, the conveyed objects P1, P2, ... can be conveyed on the conveyance belt 24 (on the drive shaft) by placing the conveyed objects P1, P2, ... on the conveyance belt 24.

Since the transport apparatus 12 of this embodiment transports the transported objects P1, P2, ... by such an action, it is impossible to prevent the vibration generated by the transport mechanism 16 side or the impact when the transported objects P1, P2, ... are placed, in particular A thrust load or the like applied in the axial direction of the drive shaft 14 causes a vibration or movement of the drive shaft 14 in the axial direction during operation. Further, it is also difficult to prevent the phenomenon that the axial movement of the drive shaft 14 is directly transmitted to the output shaft 58 of the speed reducer 36. Further, in this embodiment, the gear motor 18 (not bad, but as a result) is capable of fixing the holder 30 of the conveying mechanism 16 and the housing 50 of the reduction gear 36 of the gear motor 18 so as not to be relatively movable in the axial direction. The torque arm coupling mechanism 32 is fixed to the holder 30 of the conveying mechanism 16. Therefore, as long as the vibration of the drive shaft 14 or the slight displacement of the axial direction is input to the output shaft 58 (since the housing 50 of the reducer 36 is firmly fixed to the mount 30), the vibration or axial direction of the drive shaft 14 The slight displacements all appear as relative vibration or relatively slight displacement between the output shaft 58 and the housing 50 of the reducer 36. Therefore, the oil seals 80, 81 are also exposed in a very harsh state.

However, in the present embodiment, the oil seal 80 in which the two first main lip portions 86 and the second main lip portion 88 are arranged is used. Both the first main lip portion 86 and the second main lip portion 88 are arranged in the same direction with respect to the bearings 62 and 64, that is, in a state in which the package oil is leaked from the speed reducer 36 to the outside of the speed reducer 36. And both of them abut against the outer circumference of the output shaft 58 by the urging force of the spring 90. Therefore, the packaging capability is extremely high. Further, each of the first main lip portion 86 and the second main lip portion 88 includes a first sub-lip portion 92 and a second sub-lip portion 94. Therefore, the first main lip portion 86 and the first sub-lip portion 92 are first subjected to standard packaging. Further, even if the first main lip portion 86 and the first sub-lip portion 92 are not completely encapsulated, the second main lip portion 88 and the second sub-lip portion 94 are again subjected to standard packaging, and as a result, Can maintain very powerful packaging functions for a long time. In this regard, in addition to the main lip portion, a lip seal having a secondary lip portion that mainly prevents intrusion of dirt or garbage from the outside of the reducer (only the second main lip portion 88 corresponding to the present embodiment) is provided. And an oil seal of the lip of the second auxiliary lip portion 94 or a three-lip oil seal that further prevents the dust in the oil seal from entering the oil seal in the reducer (only the second main body corresponding to the second embodiment) The lip portion 88, the second sub-lip 94, and the oil seal of the lip portion of the first sub-master lip portion 92 can exhibit a more reliable packaging function.

Further, the oil seal 80 has a single outer annular portion 82 (for example, compared with a structure in which two oil seals whose axial width is half of the oil seal 80 is simply arranged in the axial direction) is generally the same. The axial width can also maintain the strength of the outer annular portion 82 at a high level, and can maintain the assembly strength of the oil seal, that is, the assembly force to the main body 50A of the casing 50. Therefore, even if a slight relative displacement in the axial direction occurs between the casing 50 of the reduction gear 36 and the output shaft 58, the oil seal 80 can be firmly locked to the casing 50 side.

Moreover, since the transport device 12 of the present embodiment can be The oil seal 80 ensures a high degree of packaging function, so with regard to the bearings 62, 64, an open type bearing without a sealing member can be used to achieve a corresponding cost reduction.

Further, in the above-described embodiment, both the first main lip portion 86 and the second main lip portion 88 are provided with the biasing means by the spring 90. However, the main lip portion of the present invention does not necessarily have to be attached by the spring biasing means. As a necessary condition, it is also possible to provide an urging force of abutment of the main lip by means of a urging means (a urging means by reaction with respect to elastic deformation of the lip) using a so-called "fastening margin". Further, the present invention has a structure in which "two" main lip portions functioning as main encapsulation functions, and is different from a conventional configuration in which a sub-lip portion or a dust lip portion having a fastening margin different from that of the main lip portion is attached.

Further, in the above embodiment, the two first main lip portions 86 and the second main lip portion 88 have the same shape, and have the same direction and output with respect to the bearings 62 and 64 by the biasing means of the same springs 90 and 91. The shaft 58 abuts. That is, although the first main lip portion 86 and the second main lip portion 88 having the same structure and packaging function are assembled in parallel, in the present invention, in short, the oil seal is provided with two The main lip of the main and equivalent packaging function can be used, and the shape or force means need not be identical. For example, if the force is the same, one main lip may have a spring-based biasing means, and the other main lip may have a biasing means based on the tightening margin. Further, the arrangement directions of the two main lips are not necessarily the same, and for example, one may be disposed toward the bearing side, and the other may be disposed toward the opposite side of the bearing.

Further, the present invention is exemplified in the above embodiment, for example, when the gear motor 18 is transmitted as a result, it can be fixed so as not to be relatively movable in the axial direction. When the arm connecting mechanism 32 is coupled to the fixing frame (fixing member) 30 of the conveying mechanism 16, the most remarkable effect can be obtained. However, the present invention does not necessarily have to transmit the gear motor to fix the gear motor in the axial direction. A link to a mobile (or a fixed worry) link is required. In other words, the gear motor can be applied to a conveying device that is coupled to the fixing member by a coupling mechanism that is coupled in a state in which a slight displacement is generated in the axial direction.

Further, in the above-described embodiment, the drive shaft of the transport mechanism itself is initially provided with an extension of the degree of the gear motor. However, the drive shaft of the present invention does not need to be a single member (with the extension), even if the connector is used. The other shaft member or the like is coaxially coupled to the drive shaft, and the shaft member is inserted into the output shaft of the reduction gear (the same problem occurs), and the present invention can be effectively applied (in the scope of the present invention). From this point of view, the output shaft of the reduction gear of the gear motor used in the conveying device of the present invention does not necessarily have to be constituted by a hollow output shaft having a hollow portion. For example, the output shaft of the speed reducer itself may be solid and connected to the drive shaft coaxially by a connector or the like.

Further, in the above embodiment, the transport device in which the transport belt is wound around the drive shaft of the transport mechanism is exemplified, but the transport mechanism of the transport device of the present invention is not limited thereto. For example, the roll transport mechanism may be configured such that a guide shaft is provided between a plurality of drive shafts arranged in parallel, and the drive shaft is disposed one by one or plural, and the conveyed object side and the rotation are driven according to the rotation of the drive shaft. The drive shaft and the guide shaft are directly contacted for transport.

Furthermore, the present invention is applicable to the transporting object P1 as in the above embodiment. P2 is particularly effective when it is passed through a type of conveying device that is coupled to the drive shaft 14 coaxially coupled to the output shaft 58 of the gear motor 18 (because it can effectively prevent vibration or the like from the drive shaft 14 from being directly transmitted to the output shaft 58). However, the present invention is not necessarily applicable to the type in which the conveyance passes on the drive shaft, but is equally applicable even if the drive shaft is disposed away from the conveying surface, and the corresponding effect can be obtained.

In short, any drive shaft having a configuration in which a drive shaft is driven by a gear motor having an output shaft coaxially coupled to the drive shaft has the same problem, and the same effects as described above can be obtained by applying the present invention.

12‧‧‧Conveyor

14‧‧‧ drive shaft

16‧‧‧Transportation agencies

18‧‧‧ Gear motor

24‧‧‧Conveyor belt

30‧‧‧Retaining frame

32‧‧‧Torque arm linkage mechanism

34‧‧‧Motor

36‧‧‧Reducer

50‧‧‧shell

50A‧‧‧Shell body

50B‧‧‧Shell cover

58‧‧‧ Output shaft

62, 64‧‧‧ bearing

80, 81‧‧‧ outside ring

82‧‧‧Outer ring

86, 88‧‧‧1st main lip, 2nd main lip

90, 91‧‧ ‧ spring

P1, P2‧‧‧ transporting objects

Fig. 1 is a plan view showing a conveying device of an example of an embodiment of the present invention and including a partially enlarged cross section.

Fig. 2 is a front view of the above conveying device.

Fig. 3 is an enlarged cross-sectional view showing the main part of Fig. 1.

12‧‧‧Conveyor

24‧‧‧Conveyor belt

P1‧‧‧Transport

25‧‧‧ bearing

30A‧‧‧ components

20‧‧‧ keys

16‧‧‧Transportation agencies

75‧‧‧ nuts

76‧‧‧shims

30B‧‧‧fixed surface

30‧‧‧Retaining frame

26‧‧‧ Bearing

22‧‧‧Drive wheel

74‧‧‧Bolts

72‧‧‧ torque arm

62A‧‧‧Outer ring

58‧‧‧ Output shaft

58A‧‧‧ Hollow

58B‧‧‧ keyway

14‧‧‧ drive shaft

81‧‧‧ oil seal

52‧‧‧ keys

48‧‧‧ bearing

54‧‧‧ spur gear

32‧‧‧Torque arm linkage mechanism

62‧‧‧ bearing

60‧‧‧ keys

57‧‧‧ keys

38‧‧‧ Hypoid pinion

56‧‧‧ Output gear

14A‧‧‧ keyway

34A‧‧‧Motor shaft

64A‧‧‧Outer ring

64‧‧‧ bearing

64B‧‧‧ inner circle

58‧‧‧ Output shaft

83‧‧‧Support

90‧‧‧ Spring

86‧‧‧1st main lip

82‧‧‧Outer ring

91‧‧‧ Spring

92‧‧‧1st lip

80‧‧‧ oil seal

84‧‧‧Support

94‧‧‧2nd lip

88‧‧‧2nd main lip

50‧‧‧shell

50A‧‧‧Shell body

50B‧‧‧Shell cover

70‧‧‧ bolt

66‧‧‧ cover

46‧‧‧ bearing

36‧‧‧Reducer

42‧‧‧Intermediate axis

44‧‧‧ keys

40‧‧ ‧ hypoid gear

18‧‧‧ Gear motor

34‧‧‧Motor

Claims (7)

A conveying device comprising a conveying mechanism provided with a driving shaft and a gear motor for driving the driving shaft, wherein the gear motor comprises: an output shaft coaxially coupled to the driving shaft; and a bearing supporting the output shaft; And an oil seal disposed between the output shaft and the member supporting the bearing, and the oil seal has a single outer annular portion, a support portion protruding from the outer annular portion toward the inner peripheral side, and Two main lip portions are provided at the front end of the support portion, and the two main lip portions have a biasing means for biasing the main lip portion to the output shaft. The transport device according to claim 1, wherein the output shaft is a hollow output shaft having a hollow portion, and the drive shaft or a shaft member coaxially coupled to the drive shaft is inserted into the hollow portion. Thereby, the aforementioned output shaft and drive shaft are coupled in a coaxial manner. The transport device according to the first or second aspect of the invention, wherein the gear motor is fixed to a connecting mechanism capable of fixing the fixing member of the transport mechanism and the housing of the gear motor so as not to be movable in the axial direction. The fixing member of the conveying mechanism. Such as the conveying device described in the first or second item of the patent application scope Wherein the two main lips are in the same shape. The transport device according to claim 1 or 2, wherein the two main lips are in contact with the output shaft in the same direction with respect to the bearing. The conveying device according to the first or second aspect of the invention, wherein the bearing is an open bearing that does not have a sealing member. The conveying device according to the first or second aspect of the invention, wherein the conveying device passes through the driving shaft of the conveying device.