EP3401058A1 - Werkzeugkupplungsanordnung - Google Patents
Werkzeugkupplungsanordnung Download PDFInfo
- Publication number
- EP3401058A1 EP3401058A1 EP17170944.7A EP17170944A EP3401058A1 EP 3401058 A1 EP3401058 A1 EP 3401058A1 EP 17170944 A EP17170944 A EP 17170944A EP 3401058 A1 EP3401058 A1 EP 3401058A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- coupling
- stop ring
- slideable sleeve
- diameter portion
- sleeve
- 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.)
- Withdrawn
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
- B25B23/0007—Connections or joints between tool parts
- B25B23/0035—Connection means between socket or screwdriver bit and tool
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
- B25B23/02—Arrangements for handling screws or nuts
- B25B23/08—Arrangements for handling screws or nuts for holding or positioning screw or nut prior to or during its rotation
- B25B23/12—Arrangements for handling screws or nuts for holding or positioning screw or nut prior to or during its rotation using magnetic means
Definitions
- the present invention relates to a tool bit coupling assembly and, more particularly, to a tool bit coupling assembly providing increased defect-free ratio and improved quality.
- a typical tool coupler generally includes a driving end for coupling with an automatic tool or a manual tool and an insertion end for coupling with a tool bit of a screwdriver or another tool. Furthermore, the typical tool coupler generally includes a slideable sleeve for easy assembly and detachment of the tool bit.
- FIG. 6 shows a conventional tool bit coupling assembly including a coupling rod 1', a coupling device 2', and a sleeve device 3'.
- the coupling rod 1' includes a driving end 11' and an insertion end 12'.
- the insertion end 12' includes a central insertion groove 121'.
- An annular groove 122' is defined in an outer periphery of the insertion end 12'.
- the coupling device 2' is mounted in the insertion groove 121'.
- the sleeve device 3' includes a slideable sleeve 31', a front stop ring 32', a spring 33', and a rear stop ring 34'.
- the slideable sleeve 31' includes a receiving hole 311' having a middle section 312' with an inner diameter larger than an inner diameter of the front end of the receiving hole 311'.
- the receiving hole 311' further includes a coupling section 313' located behind the middle section 312' and having an inner diameter A.
- the front stop ring 32' is disposed in the annular groove 122'.
- the spring 33' is disposed behind the front stop ring 32'.
- the rear stop ring 34' is mounted around the insertion end 12' and is located behind the front stop ring 32'.
- An outer diameter B of the rear stop ring 34' is slightly larger than the inner diameter A of the coupling section 313' of the slideable sleeve 31'.
- the rear stop ring 34' includes an inclined guiding face 341' at a front end thereof.
- the coupling device 2' and the slideable sleeve device 3' are mounted around the coupling rod 1'.
- the rear stop ring 34' is mounted around the coupling rod 1' from a rear end of the coupling rod 1'.
- a rearward axial force is applied to the slideable sleeve 31' to tightly couple an inner periphery of the coupling section 313' with an outer periphery of the rear stop ring 34'.
- the slideable sleeve 31' is slideable along the axial direction of the coupling rod 1' without the risk of disengagement.
- An objective of the present invention is to provide a tool bit coupling assembly providing increased defect-free ratio and improved quality.
- a tool bit coupling assembly includes a coupling rod having a driving end and an insertion end opposite to the driving end.
- the insertion end includes an insertion groove extending along a longitudinal axis.
- a coupling device is mounted in the insertion groove.
- a sleeve device includes a slideable sleeve movable on the insertion end of the coupling rod along the longitudinal axis.
- the slideable sleeve includes a receiving hole having an inner diameter larger than an outer diameter of the insertion end.
- the receiving hole of the slideable sleeve further includes a coupling section at a rear end thereof.
- the sleeve device further includes a rear stop ring having a receiving hole.
- the insertion end of the coupling rod is received in the receiving hole of the rear stop ring.
- the rear stop ring further includes a smaller diameter portion having an outer diameter slightly smaller than an inner diameter of the coupling section of the slideable sleeve.
- the rear stop ring further includes a larger diameter portion having an outer diameter slightly larger than the inner diameter of the coupling section of the slideable sleeve.
- An inclined guiding face is formed between the smaller diameter portion and the larger diameter portion.
- the first coupling section of the slideable sleeve is firstly coupled with the smaller diameter portion of the rear stop ring. When the slideable sleeve is moved toward the driving end of the coupling rod along the longitudinal axis, an inner periphery of the coupling section of the slideable sleeve is tightly fit around the larger diameter portion of the rear stop ring.
- the larger diameter portion is located at an intermediate portion of the rear stop ring.
- the slideable sleeve further includes an additional smaller diameter portion.
- the larger diameter portion is located between the smaller diameter portions.
- An additional inclined guiding face is formed between the larger diameter portion and the additional smaller diameter portion.
- the insertion end of the coupling rod includes a front positioning hole and a rear positioning hole.
- Each of the front positioning hole and the rear positioning hole extends in a radial direction perpendicular to the longitudinal axis and intercommunicates with the insertion groove.
- the insertion end of the coupling rod further includes an annular groove in an outer periphery thereof.
- the coupling device includes a magnetic device, a front positioning ball received in the front positioning hole, and a rear positioning ball received in the rear positioning hole.
- the sleeve device further includes a front stop ring and a spring.
- the receiving hole of the slideable sleeve includes a mediate section having an inner diameter larger than an inner diameter of a front end of the receiving hole of the slideable sleeve.
- the coupling section is located behind the mediate section.
- the front stop ring is mounted in the annular groove of the coupling rod and has an outer diameter larger than the inner diameter of the front end of the receiving hole of the slideable sleeve and smaller than the inner diameter of the mediate section.
- the spring is located behind the front stop ring and providing elasticity for movement of the slideable sleeve.
- the receiving hole of the rear stop ring includes a ball receiving groove for receiving the rear positioning ball.
- the receiving hole of the rear stop ring includes an inclined face on an end edge thereof.
- the coupling section of the slideable sleeve is firstly in a position covering the smaller diameter portion of the rear stop ring and can be positioned along the longitudinal axis. Then, the slideable sleeve is moved rearward or the rear stop ring is moved forward along the longitudinal axis to make the coupling section of the slideable sleeve move along the inclined guiding face and expand. An inner periphery of the coupling section of the slideable sleeve moves across the smaller diameter portion and is then tightly fit around the larger diameter portion of the rear stop ring.
- the tool bit coupling assembly according to the present invention is applied with a force to proceed with assembly after the axial positioning, deviation from the longitudinal axis will not occur during the assembling procedure, significantly increasing the defect-free rate and improving the quality. Furthermore, after assembly, the inclined face of the rear stop ring abuts the rear positioning ball, providing smooth forward movement of the rear stop ring.
- a tool bit coupling assembly of an embodiment according to the present invention includes a coupling rod 1, a coupling device 2, and a sleeve device 3.
- the coupling rod 1 includes a driving end 11 adapted for coupling with a manual tool or an automatic tool (not shown).
- the coupling rod 1 further includes an insertion end 12 opposite to the driving end 11.
- the insertion end 12 includes an insertion groove 121 extending along a longitudinal axis X.
- the insertion end 12 further includes a front positioning hole 122 and a rear positioning hole 1221. Each of the front positioning hole 122 and the rear positioning hole 1221 extends in a radial direction perpendicular to the longitudinal axis X and intercommunicates with the insertion groove 121.
- the insertion end 12 further includes an annular groove 123 in an outer periphery thereof.
- the coupling device 2 is mounted in the insertion groove 121 and can be used to couple with a screwdriver bit.
- the coupling device 2 includes a magnetic device 21, a front positioning ball 22 received in the front positioning hole 122, and a rear positioning ball 221 received in the rear positioning hole 1221.
- a spring 211 is mounted behind the magnetic device 21.
- the sleeve device 3 includes a slideable sleeve 31, a front stop ring 32, a spring 33, and a rear stop ring 34.
- the slideable sleeve 31 includes a receiving hole 311 having an inner diameter larger than an outer diameter of the insertion end 12.
- the receiving hole 311 of the slideable sleeve 31 includes a mediate section 312 having an inner diameter larger than an inner diameter of a front end of the receiving hole 311 of the slideable sleeve 31.
- the receiving hole 311 of the slideable sleeve 31 further includes a coupling section 313 at a rear end thereof.
- the coupling section 313 has an inner diameter C.
- a shoulder 314 is formed between the front end of the receiving hole 311 and the mediate section 312.
- the front stop ring 32 is mounted in the annular groove 123 of the coupling ring 1 and can abut the shoulder 314.
- An outer diameter of the front stop ring 32 is larger than the inner diameter of the front end of the receiving hole 311 of the slideable sleeve 31 and is smaller than the inner diameter of the mediate section 312.
- the spring 33 is located behind the front stop ring 32. The spring 33 is attached between the front stop ring 32 and the rear stop ring 34 to provide elasticity for movement of the slideable sleeve 31.
- the rear stop ring 34 includes a receiving hole 341 having a diameter larger than the outer diameter of the insertion end 12 of the coupling rod 1.
- the rear stop ring 34 further includes a smaller diameter portion 342 having an outer diameter D slightly smaller than the inner diameter C of the coupling section 313 of the slideable sleeve 31.
- the rear stop ring 34 further includes a larger diameter portion 343 located behind the smaller diameter portion 342 having an outer diameter E slightly larger than the inner diameter C of the coupling section 313 of the slideable sleeve 31. Namely, the outer diameter E is larger than the inner diameter C, which, in turn, is larger than the outer diameter D.
- An inclined guiding face 344 is formed between the smaller diameter portion 342 and the larger diameter portion 343.
- An inner periphery of the receiving hole 341 of the rear stop ring 34 includes a ball receiving groove 345 for receiving the rear positioning ball 221.
- the larger diameter portion 343 is located at an intermediate portion of the rear stop ring 34.
- the slideable sleeve 31 further includes an additional smaller diameter portion 342.
- the larger diameter portion 343 is located between the smaller diameter portions 342.
- An additional inclined guiding face 344 is formed between the larger diameter portion 343 and the additional smaller diameter portion 342.
- the receiving hole 341 of the rear stop ring 34 includes an inclined face 346 on each of a front end edge and a rear end edge thereof.
- the coupling device 2 and the sleeve device 3 are mounted on the coupling rod 1.
- the rear stop ring 34 is mounted from the rear end of the coupler 1 to the outer edge of the insertion portion 12. Furthermore, the slideable sleeve 31 is moved along the longitudinal axis X to a position in which the coupling section 313 firstly covers the smaller diameter portion 342 of the rear stop ring 34 and can be positioned along the longitudinal axis X (see FIG. 2 ).
- the slideable sleeve 31 is moved rearward toward the driving end 11 of the coupling rod 1 along the longitudinal axis X.
- the coupling section 313 of the slideable sleeve 31 moves along the inclined guiding face 344 and expands.
- An inner periphery of the coupling section 313 of the slideable sleeve 31 moves across the smaller diameter portion 342 and is then tightly fit around the larger diameter portion 343 of the rear stop ring 34. Since the tool bit coupling assembly according to the present invention is applied with a force to proceed with assembly after the axial positioning, deviation from the longitudinal axis X will not occur during the assembling procedure, significantly increasing the defect-free rate and improving the quality.
- the rear stop ring 34 can be located behind the most protruded position of the rear positioning ball 221 in the radial direction (see FIG. 3 ).
- the inclined face 346 can slide along the rear positioning ball 221 after guiding the rear stop ring 34. Additional tool is not required for pushing the slideable sleeve 31 forward, and the rear stop ring 34 can smoothly move forward to the locking position.
- a screwdriver bit 4 or another tool bit can be inserted into the insertion groove 121 and can be magnetically positioned by the magnetic device 21.
- the slideable sleeve 31 is moved rearward by the elastic force of the spring 33 to a position in which the ball receiving groove 345 is not aligned with the rear positioning ball 221.
- the magnetic device 21 is positioned, and the front positioning ball 22 engages with the screwdriver bit 4.
- the slideable sleeve 31 can be moved forward along the longitudinal axis X to disengage the screwdriver bit 4 from the insertion groove 121.
- slideable sleeve 21 moves along the longitudinal axis X to control coupling or detachment of the screwdriver bit 4.
- slideable sleeve 31 provides better axial assembling precision to prevent jamming during assembly, thereby increasing the operational smoothness.
- the present invention significantly increases the detect-free rate and improves the quality, assuring long-term smooth operation along the longitudinal axis X. It can be appreciated that the coupling device 2 and the sleeve device 3 can use other components.
- the present invention is not limited to the structure of the above mentioned embodiments.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP17170944.7A EP3401058A1 (de) | 2017-05-12 | 2017-05-12 | Werkzeugkupplungsanordnung |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP17170944.7A EP3401058A1 (de) | 2017-05-12 | 2017-05-12 | Werkzeugkupplungsanordnung |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3401058A1 true EP3401058A1 (de) | 2018-11-14 |
Family
ID=58707431
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17170944.7A Withdrawn EP3401058A1 (de) | 2017-05-12 | 2017-05-12 | Werkzeugkupplungsanordnung |
Country Status (1)
Country | Link |
---|---|
EP (1) | EP3401058A1 (de) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20110006489A1 (en) * | 2009-07-07 | 2011-01-13 | Jin-Tsai Lai | Quick-release mechanism for hand tool |
US20160311091A1 (en) * | 2015-04-25 | 2016-10-27 | Compass Corp. (The president is Chen, Su-Chiu) | Tool coupler |
-
2017
- 2017-05-12 EP EP17170944.7A patent/EP3401058A1/de not_active Withdrawn
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20110006489A1 (en) * | 2009-07-07 | 2011-01-13 | Jin-Tsai Lai | Quick-release mechanism for hand tool |
US20160311091A1 (en) * | 2015-04-25 | 2016-10-27 | Compass Corp. (The president is Chen, Su-Chiu) | Tool coupler |
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Legal Events
Date | Code | Title | Description |
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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STAA | Information on the status of an ep patent application or granted ep patent |
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Effective date: 20170922 |
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AX | Request for extension of the european patent |
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STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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18D | Application deemed to be withdrawn |
Effective date: 20190515 |