CN113883179A - Shaft coupling device - Google Patents
Shaft coupling device Download PDFInfo
- Publication number
- CN113883179A CN113883179A CN202110677061.1A CN202110677061A CN113883179A CN 113883179 A CN113883179 A CN 113883179A CN 202110677061 A CN202110677061 A CN 202110677061A CN 113883179 A CN113883179 A CN 113883179A
- Authority
- CN
- China
- Prior art keywords
- pin groove
- pin
- coupling portion
- shaft
- coupling
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000008878 coupling Effects 0.000 title claims abstract description 134
- 238000010168 coupling process Methods 0.000 title claims abstract description 134
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 134
- 230000002093 peripheral effect Effects 0.000 claims description 20
- 230000005540 biological transmission Effects 0.000 claims description 18
- 239000003638 chemical reducing agent Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000012141 concentrate Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
- F16D1/02—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for connecting two abutting shafts or the like
- F16D1/04—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for connecting two abutting shafts or the like with clamping hub; with hub and longitudinal key
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
- B25J17/00—Joints
- B25J17/02—Wrist joints
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Robotics (AREA)
- Snaps, Bayonet Connections, Set Pins, And Snap Rings (AREA)
- Insertion Pins And Rivets (AREA)
Abstract
The shaft coupling device of the present invention can avoid damage to mechanical components mounted on a shaft even when an excessive load is applied to the shaft. The disclosed device is provided with: a coupling part (1) having a pin groove (11); a coupling portion (2) having a pin groove (21) and having an end surface facing the end surface of the coupling portion (1); a positioning pin (3) partially fitted in the pin groove (11) and partially fitted in the pin groove (21); and a jig (4) for fixing the coupling part (1) and the coupling part (2) into which the positioning pin (3) is fitted.
Description
Technical Field
The present invention relates to a shaft coupling device for a coupling shaft.
Background
Conventionally, a shaft coupling device for coupling shafts is known in a robot (see, for example, patent documents 1 and 2). Further, a mechanical component is mounted on the shaft. Examples of the mechanical component include a speed reducer and a motor.
Documents of the prior art
Patent document
Patent document 1: international publication No. 2018/130447
Patent document 2: international publication No. 1999/001261
Disclosure of Invention
Problems to be solved by the invention
Here, one of the main causes of the robot failure is a failure of a mechanical component. Further, when an excessive load is applied to the shaft coupled by the conventional shaft coupling device in the rotational direction, mechanical parts attached to the shaft may be damaged. For example, when the mechanical component is a speed reducer, the speed reducer receives a load applied to the shaft, and when an excessive load is applied to the shaft, the teeth may be missing. In addition, when the mechanical component is damaged, the robot causes a problem in position control.
The present invention has been made to solve the above-described problems, and an object thereof is to provide a shaft coupling device capable of avoiding damage to a mechanical component attached to a shaft even when an excessive load is applied to the shaft.
Means for solving the problems
The shaft coupling device of the present invention is characterized by comprising: a first coupling portion having a first pin groove; a second coupling part having a second pin groove and an end surface facing the end surface of the first coupling part; a force transmission member having a part fitted in the first pin groove and a part fitted in the second pin groove; and a jig fixing the first coupling portion and the second coupling portion in which the force transmission member is embedded.
Effects of the invention
According to the present invention, since the structure is as described above, even when an excessive load is applied to the shaft, damage to the mechanical components attached to the shaft can be avoided.
Drawings
Fig. 1 is an external perspective view showing a configuration example of a shaft coupling device according to embodiment 1.
Fig. 2 is a sectional view showing a structural example of the shaft coupling device according to embodiment 1, as viewed from above.
Fig. 3 is an exploded perspective view showing a configuration example of a shaft coupling device according to embodiment 1.
Fig. 4 is a sectional view showing a structural example of a shaft coupling device according to embodiment 2, as viewed from above.
Fig. 5 is a side view showing another configuration example of the force transmission member in embodiments 1 and 2.
Fig. 6 is an external perspective view showing a configuration example of a shaft coupling device according to embodiment 3.
Fig. 7 is a sectional view showing a structural example of a shaft coupling device according to embodiment 3, as viewed from above.
Fig. 8 is an exploded perspective view showing a configuration example of a shaft coupling device according to embodiment 3.
Detailed Description
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
Fig. 1 to 3 are views showing a configuration example of a shaft coupling device according to embodiment 1.
The shaft coupling device couples shafts (a first shaft and a second shaft). In the figure, only a coupling portion (first coupling portion) 1 is shown for the first shaft, and only a coupling portion (second coupling portion) 2 is shown for the second shaft. Mechanical components (not shown) are mounted on the shaft. The mechanical component is, for example, a speed reducer or a motor. For example, one of the first shaft and the second shaft is a robot arm having a mechanical part, and the other is a member mounted on the torque sensor or a torque sensor main body. As shown in fig. 1 to 3, the shaft coupling device includes a coupling portion 1, a coupling portion 2, a positioning pin (force transmission member) 3, and a jig 4.
The coupling portion 1 is a cylindrical member, and an end face thereof faces an end face of the coupling portion 2. A pin groove (first pin groove) 11 and a jig projection 12 are formed on the outer peripheral surface of the coupling portion 1.
One or more pin grooves 11 are formed along the axial direction of the coupling portion 1. In fig. 1 to 3, a pin groove 11 having 10 semi-cylindrical portions is formed. The shape and size of the pin groove 11 are half of the shape and size that can be fitted into the outer peripheral surface of one end side of the positioning pin 3.
At least one jig projection 12 is formed along the circumferential direction of the coupling portion 1. In fig. 1 to 3, the jig convex portion 12 is formed at one position on the outer peripheral surface of the coupling portion 1 on the coupling portion 2 side.
The coupling portion 2 is a cylindrical member, and an end face thereof faces an end face of the coupling portion 1. A pin groove (second pin groove) 21 and a jig projection 22 are formed on the outer peripheral surface of the coupling portion 2.
One or more pin grooves 21 are formed along the axial direction of the coupling portion 2. In fig. 1 to 3, a pin groove 21 having 10 semi-cylindrical portions is formed. The shape and size of the pin groove 21 are half of the shape and size that can be fitted into the outer peripheral surface of the other end side of the positioning pin 3. The arrangement interval of the pin grooves 21 is the same as (includes substantially the same meaning as) the arrangement interval of the pin grooves 11.
At least one jig projection 22 is formed along the circumferential direction of the coupling portion 2. In fig. 1 to 3, the jig convex portion 22 is formed at one position on the outer peripheral surface of the coupling portion 2 on the coupling portion 1 side.
The positioning pin 3 is a cylindrical member. Half of the outer peripheral surface of the positioning pin 3 on one end side is fitted into the pin groove 11 of the coupling portion 1, and half of the outer peripheral surface on the other end side is fitted into the pin groove 21 of the coupling portion 2. In fig. 1 to 3, 10 positioning pins 3 are provided, but it is sufficient that 1 or more positioning pins 3 are provided. As the positioning pin 3, an existing product (commercially available product) can be used.
The hardness of the coupling portion 1 and the coupling portion 2 may be the same as or different from the hardness of the positioning pin 3. On the other hand, if the hardness of the coupling portions 1, 2 and the positioning pin 3 is higher than the hardness of the machine component, there is a possibility that damage may occur in the machine component without breaking the coupling portions 1, 2 or the positioning pin 3. Therefore, at least one of the coupling portions 1, 2 and the positioning pin 3 has a hardness lower than that of the mechanical component.
The jig 4 is a cylindrical member, and fixes the coupling portion 1 and the coupling portion 2 into which the positioning pins 3 are fitted. As shown in fig. 1 to 3, the jig 4 includes a jig piece 41, a jig piece 42, and a fastening bolt 43.
The jig piece 41 is a semi-cylindrical member, and holds a part of the coupling portion 1 and the coupling portion 2 into which the positioning pin 3 is fitted. The inner peripheral surface of the jig piece 41 is formed with a pin groove 411 and a coupling portion recess 412.
The pin groove 411 is formed along the axial direction of the jig piece 41, and the remaining half of the outer peripheral surface of the positioning pin 3 is fitted therein. In fig. 1 to 3, a pin groove 411 having 5-step semi-cylindrical shape is formed. The shape and size of the pin groove 411 are the shape and size of the remaining half surface of the outer peripheral surface of the positioning pin 3 that can be fitted. The arrangement interval of the pin grooves 411 is the same as (includes substantially the same meaning as) the arrangement interval of the pin grooves 11 and the pin grooves 21.
The coupling portion recesses 412 are formed in plural along the circumferential direction of the clip piece 41, and fit into the clip protrusions 12 and the clip protrusions 22. In fig. 1 to 3, the coupling portion recess 412 is formed in two places.
Further, bolt holes 413 are formed at both ends of the clamp piece 41.
The jig piece 42 is a semi-cylindrical member, and holds the remaining portions of the coupling portion 1 and the coupling portion 2 in which the positioning pins 3 are fitted. The inner peripheral surface of the jig piece 42 is formed with a pin groove 421 and a coupling portion recess 422.
The pin groove 421 is formed along the axial direction of the clamp piece 42, and the remaining half surface of the outer peripheral surface of the positioning pin 3 is fitted therein. In fig. 1 to 3, 5 semi-cylindrical pin grooves 421 are formed. The shape and size of pin groove 421 are the shape and size of the remaining half surface that can be fitted into the outer peripheral surface of positioning pin 3. The arrangement interval of the pin grooves 421 is the same as (includes substantially the same meaning as) the arrangement interval of the pin grooves 11 and 21.
The coupling portion recesses 422 are formed in plural along the circumferential direction of the clamp piece 42, and the remaining portions of the clamp protrusions 12 and 22 are fitted therein. In fig. 1 to 3, the coupling portion recess 422 is formed in two places.
Further, bolt holes 423 are formed at both ends of the clamp piece 42.
The clamp piece 41 and the clamp piece 42 are coupled by a coupling bolt 43. That is, the clamp piece 41 and the clamp piece 42 are coupled by inserting the coupling bolt 43 into the bolt hole 413 and the bolt hole 423 and screwing them together.
The pin grooves 11, 21, 411, 421 of the coupling portions 1, 2, 41, and 42 form holes 5. The positioning pin 3 is inserted into the hole 5. In addition, when the number of the positioning pins 3 used in the shaft coupling device is 1, one of the pin groove 411 and the pin groove 421 is not necessarily formed.
Next, the effects of the shaft coupling device according to embodiment 1 shown in fig. 1 to 3 will be described. In the shaft coupling device according to embodiment 1 shown in fig. 1 to 3, a positioning pin is used for transmitting force in the direction of rotation of the shaft, and the force transmission force can be controlled by the positioning pin 3. Therefore, in this shaft coupling device, when a force in the rotational direction larger than the design specification is generated, the coupling portions 1 and 2 or the positioning pin 3 are broken, and damage to the mechanical components attached to the shaft is avoided.
As described above, according to embodiment 1, the shaft coupling device includes: a coupling portion 1 having a pin groove 11; a coupling part 2 having a pin groove 21 and an end face opposing to the end face of the coupling part 1; a positioning pin 3 having a part fitted into the pin groove 11 and a part fitted into the pin groove 21; and a jig 4 for fixing the coupling portion 1 and the coupling portion 2 into which the positioning pin 3 is fitted. Thus, the shaft coupling device according to embodiment 1 can avoid damage to the mechanical components attached to the shaft even when an excessive load is applied to the shaft.
In the shaft coupling device of embodiment 1, a case is shown in which the positioning pin 3 of a cylindrical member is used as a force transmission member. However, the present invention is not limited to this, and for example, a block 6 of a prism-shaped member as shown in fig. 4 may be used as the force transmission member. In this case, the shape and size of the pin groove 11 of the coupling portion 1, the pin groove 21 of the coupling portion 2, the pin groove 411 of the jig piece 41, and the pin groove 421 (i.e., the hole 5) of the jig piece 42 are the shape and size that can be fitted into the block 6. The shaft coupling device according to embodiment 2 shown in fig. 4 can also obtain the same effects as those of the shaft coupling device according to embodiment 1.
In the shaft coupling devices according to embodiments 1 and 2, the case where the positioning pin 3 of the columnar member or the block 6 of the prismatic member is used as the force transmission member is shown. However, in addition to these, the force transmission member may be configured to have a shape in which a part thereof has a narrow portion. In fig. 5, the positioning pin 3 having a narrow portion 31 at the center in the axial direction is shown. When the positioning pin 3 is fitted into the pin groove 11 and the pin groove 21, the narrowed portion 31 shown in fig. 5 is positioned between the coupling portion 1 and the coupling portion 2, and when a force in the rotational direction larger than the design specification is generated, the positioning pin 3 is easily broken. In this way, the shaft coupling device can selectively concentrate stress on a specific portion of the force transmission member by using the force transmission member having a narrow portion.
The shaft coupling devices according to embodiments 1 and 2 have a structure in which a plurality of force transmission members are fitted in the axial direction of the coupling portions 1 and 2. In contrast, in the shaft coupling device according to embodiment 3, as shown in fig. 6 to 8, a plurality of force transmission members may be fitted in the normal direction of the coupling portions 1 and 2. Fig. 6 to 8 show a case where the positioning pin 3 is used as the force transmission member, but the present invention is not limited to this, and the block 6 may be used as the force transmission member.
In fig. 6 to 8, one or more pin grooves 11 are formed in the end surface of the coupling portion 1 along the normal direction with respect to the axial center of the coupling portion 1. In fig. 6 to 8, a pin groove 11 is formed in a semi-cylindrical shape at 12 positions. The shape and size of the pin groove 11 are half surfaces that can be fitted into the outer peripheral surface of the positioning pin 3.
Further, at least one pin groove 21 is formed in the end surface of the coupling portion 2 along the normal direction with respect to the axial center of the coupling portion 2. In fig. 6 to 8, 12 semi-cylindrical pin grooves 21 are formed. The shape and size of the pin groove 21 are the shape and size of the remaining half surface that can be fitted into the outer peripheral surface of the positioning pin 3. The arrangement interval of the pin grooves 21 is the same as (includes substantially the same meaning as) the arrangement interval of the pin grooves 11.
Further, half of the outer peripheral surface of the positioning pin 3 is fitted into the pin groove 11 of the coupling portion 1, and the remaining half of the outer peripheral surface is fitted into the pin groove 21 of the coupling portion 2. In fig. 6 to 8, 12 positioning pins 3 are provided, but 1 or more positioning pins 3 may be provided.
In addition, the holder piece 41 does not need to have the pin slot 411. Also, the clip piece 42 need not have the pin groove 421. That is, in embodiment 3, the hole 5 is formed by the pin groove 11 of the coupling portion 1 and the pin groove 21 of the coupling portion 2.
The shaft coupling device according to embodiment 3 shown in fig. 6 to 8 can also obtain the same effects as those of the shaft coupling devices according to embodiments 1 and 2.
Further, in the shaft coupling device according to embodiment 3, since the pin groove 411 and the pin groove 421 are not required, the manufacturing cost of the jig 4 and the like is reduced compared to the shaft coupling devices according to embodiments 1 and 2. Further, in the shaft coupling device according to embodiment 3, the positioning pin 3 is easy to arrange (has a high degree of freedom in design) compared to the shaft coupling devices according to embodiments 1 and 2.
On the other hand, in the shaft coupling device of embodiment 3, the design restriction on the avoidance force is large (the arrangement strength in the axial direction is strong) compared to the shaft coupling devices of embodiments 1 and 2. Further, the shaft coupling device according to embodiment 3 is larger in the radial direction than the shaft coupling devices according to embodiments 1 and 2.
In the present invention, it is possible to freely combine the respective embodiments, to modify any of the components of the respective embodiments, or to omit any of the components of the respective embodiments within the scope of the invention.
Description of the symbols
1 coupling part (first coupling part)
2 junction (second junction)
3 locating pin (force transmission component)
4 clamping apparatus
5 holes
6 blocks
11 Pin groove (first pin groove)
12 convex part for clamp
21 Pin groove (second pin groove)
22 convex part for clamp
31 narrow part
41 clamping piece
42 clamp piece
43 coupling bolt
Slot for 411 pin
412 coupling part recess
413 hole for bolt
421 pin groove
422 concave part for coupling part
423 bolt holes.
Claims (5)
1. A shaft coupling device is characterized by comprising:
a first coupling portion having a first pin groove;
a second coupling part having a second pin groove and an end surface facing the end surface of the first coupling part;
a force transmission member, a part of which is fitted into the first pin groove and a part of which is fitted into the second pin groove; and
and a jig that fixes the first coupling portion and the second coupling portion in which the force transmission member is embedded.
2. The shaft coupling device according to claim 1,
the first pin groove is formed on the outer peripheral surface of the first coupling portion along the axial direction,
the second pin groove is formed on an outer peripheral surface of the second coupling portion along an axial direction.
3. The shaft coupling device according to claim 2,
the force transfer member has a narrow portion shape.
4. The shaft coupling device according to claim 1,
the first pin groove is formed in an end surface of the first coupling portion along a normal direction with respect to an axial center,
the second pin groove is formed in an end surface of the second coupling portion along a normal direction with respect to an axial center.
5. The shaft coupling device according to any one of claims 1 to 4,
the force transmitting member is a locating pin.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2020-114591 | 2020-07-02 | ||
| JP2020114591A JP2022012623A (en) | 2020-07-02 | 2020-07-02 | Shaft fastening device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113883179A true CN113883179A (en) | 2022-01-04 |
Family
ID=79010270
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110677061.1A Pending CN113883179A (en) | 2020-07-02 | 2021-06-18 | Shaft coupling device |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2022012623A (en) |
| CN (1) | CN113883179A (en) |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2061227U (en) * | 1990-01-13 | 1990-08-29 | 湘潭市顺风空调环保设备厂 | Mechanical transmission device with removable shaft coupling piece |
| CN2402867Y (en) * | 1999-11-23 | 2000-10-25 | 机械工业部西安重型机械研究所 | Barreled tooth flank coupling with overload protecting mechanism |
| CN201037470Y (en) * | 2007-05-22 | 2008-03-19 | 杭州杭氧透平机械有限公司 | Receded disk impeller radial end-face pin connecting device |
| CN201288769Y (en) * | 2008-10-30 | 2009-08-12 | 平顶山市利安大机电设备有限公司 | Coupling |
| WO2011155311A1 (en) * | 2010-06-09 | 2011-12-15 | 兵神装備株式会社 | Buffering member, shaft coupled structure, and a uniaxial eccentric screw pump |
| CN102927143A (en) * | 2011-08-08 | 2013-02-13 | 株式会社爱德克斯 | Coupling device for connecting rotary members |
| JP2014213680A (en) * | 2013-04-24 | 2014-11-17 | 株式会社ジェイテクト | Steering column device |
| CN204961602U (en) * | 2015-07-20 | 2016-01-13 | 安徽红星阀门有限公司 | Round pin axle connecting device |
| CN207333474U (en) * | 2017-10-23 | 2018-05-08 | 河南黎明重工科技股份有限公司 | A kind of locking device for being accurately positioned transmitting large torque |
| CN207500356U (en) * | 2017-09-30 | 2018-06-15 | 广东工贸职业技术学院 | A kind of elastic dowel pin shaft coupling |
| CN110285155A (en) * | 2019-06-11 | 2019-09-27 | 淮南威凯机械设备有限公司 | A kind of yielding coupling |
| CN209653985U (en) * | 2019-03-13 | 2019-11-19 | 刘守进 | A kind of drilling tool connector group |
-
2020
- 2020-07-02 JP JP2020114591A patent/JP2022012623A/en active Pending
-
2021
- 2021-06-18 CN CN202110677061.1A patent/CN113883179A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2061227U (en) * | 1990-01-13 | 1990-08-29 | 湘潭市顺风空调环保设备厂 | Mechanical transmission device with removable shaft coupling piece |
| CN2402867Y (en) * | 1999-11-23 | 2000-10-25 | 机械工业部西安重型机械研究所 | Barreled tooth flank coupling with overload protecting mechanism |
| CN201037470Y (en) * | 2007-05-22 | 2008-03-19 | 杭州杭氧透平机械有限公司 | Receded disk impeller radial end-face pin connecting device |
| CN201288769Y (en) * | 2008-10-30 | 2009-08-12 | 平顶山市利安大机电设备有限公司 | Coupling |
| WO2011155311A1 (en) * | 2010-06-09 | 2011-12-15 | 兵神装備株式会社 | Buffering member, shaft coupled structure, and a uniaxial eccentric screw pump |
| CN102927143A (en) * | 2011-08-08 | 2013-02-13 | 株式会社爱德克斯 | Coupling device for connecting rotary members |
| JP2014213680A (en) * | 2013-04-24 | 2014-11-17 | 株式会社ジェイテクト | Steering column device |
| CN204961602U (en) * | 2015-07-20 | 2016-01-13 | 安徽红星阀门有限公司 | Round pin axle connecting device |
| CN207500356U (en) * | 2017-09-30 | 2018-06-15 | 广东工贸职业技术学院 | A kind of elastic dowel pin shaft coupling |
| CN207333474U (en) * | 2017-10-23 | 2018-05-08 | 河南黎明重工科技股份有限公司 | A kind of locking device for being accurately positioned transmitting large torque |
| CN209653985U (en) * | 2019-03-13 | 2019-11-19 | 刘守进 | A kind of drilling tool connector group |
| CN110285155A (en) * | 2019-06-11 | 2019-09-27 | 淮南威凯机械设备有限公司 | A kind of yielding coupling |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2022012623A (en) | 2022-01-17 |
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