gear unit
A technology of gear devices and gears, which is applied in the direction of gear transmissions, transmissions, belts/chains/gears, etc.
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no. 1 Embodiment approach
[0013] In the conventional gear unit, the cylindrical body in which the ball screw meshes is arranged outside the space for housing the gears (see JP-A-2005-337412). Therefore, the ball screw and components for holding the cylindrical body (for example, a bearing into which the cylindrical body is inserted, and a housing for holding the bearing) are also arranged outside the space for accommodating the gears. As a result, the conventional gear unit has many parts arranged outside the space for accommodating the gear, and has a long housing in the direction in which the rotation axis of the gear unit (that is, the rotation axis of the ball screw) extends. size. The inventors of the present invention have developed a gear device having a shorter case size in the direction in which the rotation axis extends. In the first embodiment, the concept of a gear device will be described.
[0014] figure 1 It is a conceptual diagram of the gear unit 100 of the first embodiment. refer ...
no. 2 Embodiment approach
[0025] The linear motion portion of the gear device described in connection with the first embodiment is arranged at a position away from the rotation axis of the rotary portion. Alternatively, the direct acting portion may also be a rod member extending along the rotation axis of the rotating portion. In this case, the designer who designs the gear unit can form the connection structure connecting the linear motion portion and the rotary portion in the linear motion portion and / or the rotary portion itself. As a result, the designer can give the motion converting portion a smaller size. In the second embodiment, an exemplary gear device including a lever member extending along the rotation axis of the rotating portion will be described.
[0026] figure 2 It is a conceptual diagram of 100 A of gear apparatuses of 2nd Embodiment. refer to figure 1 and figure 2 , the gear unit 100A will be described. The description of the first embodiment uses the same reference numeral...
no. 3 Embodiment approach
[0033] A designer can design various gear devices based on the design principles described in connection with the above-mentioned embodiments. In the third embodiment, an exemplary gear device will be described.
[0034] image 3 It is a sectional view of the gear device 100B of the third embodiment. Figure 4 is along image 3 A schematic cross-sectional view along line A-A is shown. refer to Figure 2 ~ Figure 4 , the gear unit 100B will be described.
[0035] The gear unit 100B includes an outer cylinder 210, a gear carrier 220, and three crankshaft assemblies 300B ( image 3 One of the three crankshaft assemblies 300B), the gear unit 400B, the motion conversion unit 500B, and two main bearings 610 and 620 are shown. The outer cylinder 210 and the gear carrier 220 form a reference figure 2 The housing 200 is illustrated. The description about the housing 200 can also be applied to the outer cylinder 210 and the gear carrier 220 . Crankshaft assembly 300B is equiva...
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