Torque connecting rod

Abstract

This invention provides a torque connecting rod that reduces wear and extends service life. [Solution] The transmission rod 20 is inserted into the main body and has a first groove 22 exposed on the outside of the main body. The detachment prevention part 30 is fitted into the main body and has a second groove 321 on its inner edge, and an installation space is formed by the second groove 321 and the first groove. The low friction device is installed within the installation space. The clutch device 50 is connected to the transmission rod and can switch between a transmission state and a trip state. When the torque device 60 presses the clutch device with a preset torque, the clutch device enters a transmission state, and the transmission rod can easily transmit torque to the main body via the clutch device. When the torque received by the transmission rod exceeds a preset torque, the clutch device is switched to a trip state, and the transmission rod can no longer transmit torque to the main body.

Description

Technical Field

[0001] The present invention relates to a torque coupling rod, and particularly to a torque coupling rod having low frictional force and a simple structure.

Background Art

[0002] The torque driver disclosed in Patent Document 1 is mainly composed of components such as a main body, an external cover body, an upper fixed torque component, and a lower fixed torque component. The upper fitting teeth of the upper fixed torque component and the lower fitting teeth of the lower fixed torque component perform connection (interlocking) and disengagement (idling). However, the external cover body only covers the outside of the main body and has no axial position limitation, so there is a risk of detaching from the main body. Furthermore, since the position limiting pin of the torque driver is located between the pin hole of the main body and the position limiting annular groove of the transmission component, it is necessary to separately provide corresponding holes in manufacturing, and the manufacturing cost of the torque driver cannot be effectively reduced. Moreover, since the contact area between the position limiting pin and the external cover body is large, there remains a problem that wear easily occurs and the service life is reduced.

[0003] In addition, the bearing structure installed at both ends of the anti-slip structure on the surface disclosed in Patent Document 2 achieves the effect of reducing the frictional force between components. However, this bearing structure can only be combined into one bearing structure by engaging the low-friction component and the surrounding components with each other, and Patent Document 2 still has problems of the complexity of the overall structure and high manufacturing cost.

[0004] In addition, the bearing structure installed at both ends of the handle tube disclosed in Patent Document 3 is installed by engaging the steel ball and the surrounding components with each other, so there remain problems of the complexity of the overall structure and high manufacturing cost.

[0005] Furthermore, Patent Document 4 discloses a structure in which bearings are provided at both ends of a rod to reduce frictional force. However, because the peripheral edges of the parts that come into contact with the bearings are flat, considerable wear occurs between the bearings and adjacent parts. Moreover, Patent Document 4 still has problems with the complexity of the overall structure and high manufacturing costs. [Prior art documents] [Patent Documents]

[0006] [Patent Document 1] Specification of Utility Model No. M600678 of the Republic of China [Patent Document 2] Republic of China Invention Patent No. I729619 Specification [Patent Document 3] Republic of China Invention Patent No. I398327 Specification [Patent Document 4] Specification of Invention Patent No. I606896 of the Republic of China [Overview of the project] [Problems that the invention aims to solve]

[0007] The main objective of this invention is to solve the problems of structural complexity and high manufacturing costs associated with known torque connecting rods. [Means for solving the problem]

[0008] To achieve the above-mentioned objectives, the torque connecting rod provided using embodiments of the present invention includes a body, a transmission rod, a detachment prevention component, a low-friction device, a clutch device, and a torque device. The main body has a first end and a second end that are positioned opposite each other along the axis. The transmission rod has an insertion end and a first groove. The insertion end is inserted into the first end along the axis, and the first groove is routed around the peripheral edge of the transmission rod and is exposed on the outside of the first end. The detachment prevention component comprises a connecting portion and a stopper portion that are connected to each other. The connecting portion is fitted to the first end, and the detachment prevention component cannot be detached from the main body along the axial direction. A second groove is provided on the inner edge of the stopper portion, and the second groove and the first groove form an installation space. The low friction device comprises a plurality of spherical contact components, which are covered by the detachment prevention component and installed within the installation space. The longitudinal axis of each spherical contact component is parallel to the axis and divides it into a first half and a second half. The first half is installed in the first groove so as to interfere in the axial direction, and the second half is installed in the second groove so as to interfere in the axial direction. The clutch device is located inside the main body and connected to the insertion end, and can be switched between a transmission state and a tripped state. The torque device is installed inside the main body along the axis, and when the torque device presses against the clutch device with a preset torque, the clutch device enters a transmission state, and the transmission rod can easily transmit torque to the main body via the clutch device. When the torque received by the transmission rod exceeds a preset torque, the clutch device switches to a tripped state, preventing the transmission rod from transmitting torque to the main body.

[0009] As described above, the torque connecting rod according to the present invention can effectively reduce the rotational friction force between the transmission rod and the main body simply by installing a low-friction device, thereby reducing wear and extending the service life.

[0010] Furthermore, the present invention, through the engagement of the transmission rod and the anti-detachment component, forms an installation space for housing the low-friction device. This not only prevents the spherical contact component of the low-friction device and the transmission rod from detaching from the main body, but also simplifies the overall structure, facilitates quick assembly, and reduces overall manufacturing costs. [Brief explanation of the drawing]

[0011] [Figure 1]This is a perspective view of the external appearance of a torque connecting rod according to the first embodiment of the present invention. [Figure 2] This is a three-dimensional exploded perspective view of a torque connecting rod according to the first embodiment of the present invention. [Figure 3] This is a cross-sectional view of the AA section in Figure 1. [Figure 4] Figure 3 is a close-up view of the area. [Figure 5] Figure 1 is a cross-sectional view of the BB section line, showing that the first and second tooth components are in meshing positions. [Figure 6] Figure 1 is a cross-sectional view of the BB section line, showing that the first and second tooth components are in the detached position. [Figure 7] This is a three-dimensional exploded perspective view of a torque connecting rod according to a second embodiment of the present invention. [Figure 8] This is a cross-sectional view of a torque connecting rod according to a second embodiment of the present invention. [Modes for carrying out the invention]

[0012] To explain the central concept of the invention described above, a description using specific embodiments will follow. It should be noted beforehand that the proportions of the various parts in the embodiments are those appropriate for the relevant description and are not based on the actual proportions of the parts.

[0013] As shown in Figures 1 to 6, the torque connecting rod 100 according to the first embodiment of the present invention comprises a main body 10, a transmission rod 20, a detachment prevention component 30, a low friction device 40, a clutch device 50, and a torque device 60. This invention is used in conjunction with a hand tool to perform fastening work on fastening components, preventing situations such as improper positioning or overtightening when fastening the components. The hand tool can be manual, electric, or pneumatic.

[0014] The body 10 has a first end 11 and a second end 12 provided opposite to each other along the axis L. Among them, the first end 11 is used to connect to the transmission rod 20, and the transmission rod 20 is connected to the aforementioned hand tool. The first end 11 has a first outer diameter R1. A tool coupling hole 121 is provided at the second end 12. The tool coupling hole 121 is polygonal and is used to connect the tool head, and the tool head is connected to the fastening part.

[0015] As shown in FIGS. 2 and 3, in the first embodiment of the present invention, a chamber 13 is provided inside the body 10.

[0016] The transmission rod 20 is provided with an insertion end 21 and a first concave groove 22. The insertion end 21 is inserted into the first end 11 along the axis L. In the first embodiment of the present invention, the first concave groove 22 is wound around the peripheral edge of the transmission rod 20 and is exposed outside the first end 11. Among them, the first concave groove 22 is an arc-shaped concave groove.

[0017] As shown in FIGS. 1 and 3, in the first embodiment of the present invention, the transmission rod 20 includes a tool connection end 23. The tool connection end 23 is located away from the opposite insertion end 21, and the tool connection end 23 is used to connect the aforementioned hand tool. Thereby, the hand tool transmits torque to the body 10 through the tool connection end 23 and the insertion end 21, and the body 10 rotates the fastening part by the tool head.

[0018] The anti-separation component 30 includes a connecting portion 31 and a stopper portion 32 that are connected to each other. By fitting the connecting portion 31 to the first end 11, the anti-separation component 30 cannot be separated from the body 10 along the axis L direction. The inner edge of the stopper portion 32 has a second concave groove 321, and an installation space S is formed by the second concave groove 321 and the first concave groove 22, and the installation space S is used to accommodate the low-friction device 40.

[0019] As shown in Figures 3 and 4, in the first embodiment of the present invention, the second groove 321 includes a stopper portion 3211 and an inclined retraction portion 3212 that are connected to each other. The stopper portion 3211 is locked in place with the low friction device 40. This prevents the transmission rod 20 from detaching from the main body 10 along the axis L, and restricts the axial movement of the transmission rod 20, so that the transmission rod 20 only rotates the main body 10 with the axis L as its center. The stopper portion 3211 is also arc-shaped.

[0020] The low-friction device 40 comprises a plurality of spherical contact components 41. The plurality of spherical contact components 41 are covered by a detachment prevention component 30 and installed within the installation space S. This prevents the detachment prevention component 30 from detaching due to the plurality of spherical contact components 41. The vertical axis C of each spherical contact component 41 is parallel to the axis L, dividing it into a first half 411 and a second half 412. The first half 411 is installed in the first groove 22 so as to interfere in the axial direction, and the second half 412 is installed in the second groove 321 so as to interfere in the axial direction. In this way, the axial interference relationship between each spherical contact component 41 and the first groove 22 and the second groove 321 provides an axial position limiting function that restricts the axial movement of the transmission rod 20. In one embodiment, the volume of the first half 411 and the volume of the second half 412 are equal, so that each spherical contact component 41 can be installed stably and in a balanced manner within the installation space S. In other embodiments, the volume of the first half 411 and the volume of the second half 412 may be different.

[0021] The stopper point 3211 is locked in place with the spherical contact part 41. The spherical contact part 41 is a steel ball, and multiple spherical contact parts 41 are arranged in a ring shape within the installation space S. As a result, there is multi-point contact between the transmission rod 20 and the low-friction device 40, and there is also multi-point contact between the detachment prevention part 30 and the low-friction device 40. This reduces friction and wear between parts when the transmission rod 20 rotates the main body 10, thanks to the multiple spherical contact parts 41.

[0022] Furthermore, the inclined retraction point 3212 is inclined and retracted in a direction away from the low-friction device 40. Since the inclined retraction point 3212 is not in contact with the low-friction device 40, contact between the detachment prevention part 30 and the low-friction device 40 can be further reduced, thereby reducing frictional resistance.

[0023] As shown in Figures 3 and 4, in the first embodiment of the present invention, the low-friction device 40 has a second outer diameter R2. The second outer diameter R2 is smaller than the first outer diameter R1. Also, the length of the stopper portion 3211 is smaller than the diameter of each of the spherical contact parts 41. The second outer diameter R2 is the outer diameter obtained after the low-friction device 40 is appropriately positioned in the installation space S.

[0024] As shown in Figures 3 and 4, the first embodiment of the present invention further includes a ring 70. The ring 70 is installed between the connecting portion 31 of the detachment prevention component 30 and the first end 11 of the main body 10. A first installation groove 311 is provided on the inside of the connecting portion 31, and a second installation groove 111 is provided around the first end 11, and the ring 70 is fitted into the first installation groove 311 and the second installation groove 111. As a result, the ring 70 can prevent the detachment prevention component 30 from detaching from the main body 10 along the axial direction L. The ring 70 also has a third outer diameter R3. The second outer diameter R2 is smaller than the third outer diameter R3, and the ring 70 is a C-shaped snap-in ring.

[0025] The clutch device 50 is provided within the chamber 13 of the main body 10 and is connected to the insertion end 21, and can switch between a transmission state and a trip state. When the clutch device 50 is in the transmission state, the hand tool transmits torque to the main body 10 via the transmission rod 20 and the clutch device 50, thereby allowing the main body 10 to rotate the fastening part using the second end 12. In contrast, when the clutch device 50 is in the tripped state, a tooth skipping phenomenon occurs in the clutch device 50, making it difficult for the hand tool to transmit torque to the main body 10 via the transmission rod 20 and the clutch device 50, and further preventing excessive rotation of the fastening part.

[0026] As shown in Figures 3 to 6, in the first embodiment of the present invention, the clutch device 50 comprises a first tooth component 51 and a second tooth component 52. The first tooth component 51 and the insertion end 21 of the transmission rod 20 are integrally molded, and the first tooth component 51 furthest from the tool connecting end 23 is provided with a plurality of first teeth 511. The second tooth component 52 is provided to slide in the chamber 13 along the axis L. The second tooth component 52 is provided with a plurality of second teeth 521, and the second teeth 521 selectively engage with or disengage from the first teeth 511.

[0027] When the clutch device 50 is in the transmission state, the first tooth component 51 and the second tooth component 52 are stably engaged (see Figure 5), and the torque of the hand tool is smoothly transmitted to the main body 10. In contrast, when the clutch device 50 is in the tripped state, tooth skipping occurs in the first tooth component 51 and the second tooth component 52. In this state, the first tooth component 51 and the second tooth component 52 repeatedly switch between the engaged position and the disengaged position (see Figure 6), and the torque of the hand tool cannot be continuously transmitted to the main body 10.

[0028] As shown in Figures 3, 5, and 6, in the first embodiment of the present invention, the clutch device 50 further includes a position limiting rod 53. A long groove 522 is drilled along the axis L on the peripheral edge of the second tooth component 52. A transverse hole 16 is provided in the main body 10 perpendicular to the axis L. The position limiting rod 53 is inserted into the transverse hole 16 and the long groove 522 and is used to limit the second tooth component 52 from simply moving and rotating along the axis L when the clutch device 50 is in the tripped state.

[0029] As shown in Figures 3 to 6, in the first embodiment of the present invention, each first tooth 511 has a first arc portion 5111 and a first vertical portion 5112, and each second tooth 521 has a second arc portion 5211 and a second vertical portion 5212. When the first tooth 511 meshes with the second tooth 521, each first arc portion 5111 is in close contact with each second arc portion 5211, and each first vertical portion 5112 and each second vertical portion 5212 are pressing against each other, and the first tooth component 51 can maintain rotation in one direction due to the pressing relationship between each first vertical portion 5112 and each second vertical portion 5212.

[0030] As shown in Figures 3 to 6, the first arc portion 5111 further includes a first support portion 5111a and a first smooth portion 5111b, and the second arc portion 5211 further includes a second support portion 5211a and a second smooth portion 5211b. When the clutch device 50 is in the tripped state, the first support portion 5111a and the second support portion 5211a press and support the first toothed component 51, causing it to move from the meshing position to the disengaged position. The first smooth portion 5111b and the second smooth portion 5211b then smoothly move the first toothed component 51 from the disengaged position to the meshing position, reducing the impact force generated by the difference in position and extending the service life of the clutch device 50.

[0031] The torque device 60 is installed inside the main body 10 along the axis L. The torque device 60 presses against the clutch device 50 with a preset torque. This puts the clutch device 50 into a transmission state, and the transmission rod 20 transmits torque to the main body 10 via the clutch device 50. This also rotates the interlocking fastening parts, completing the fastening and installation work of the fastening parts. Furthermore, if the torque received by the transmission rod 20 during operation exceeds a preset torque, the clutch device 50 switches to a trip state, and the transmission rod 20 is unable to transmit torque to the main body 10, thereby preventing damage to the fastening parts due to excessive tightening.

[0032] As shown in Figure 3, in the first embodiment of the present invention, the end of the chamber 13 away from the first end 11 communicates with a screw hole 14 and a spring hole 15. The chamber 13 is used to house a clutch device 50. The screw hole 14 and spring hole 15 are used to house a torque device 60. The torque device 60 includes a fixed part 61 and an elastic part 62. The fixing component 61 is screwed into the screw hole 14. The elastic component 62 is provided in the spring hole 15. One end of the elastic component 62 presses against the clutch device 50, and the other end presses against the fixing component 61, thereby transmitting a preset torque to the clutch device 50. In addition, a magnetic component 80 is provided on the side away from the first end 11 of the torque device 60. The magnetic component 80 is located at the inner end of the tool coupling hole 121 and is used to attract the fastening component.

[0033] As shown in Figures 2 and 3, the first embodiment of the present invention further includes a cover component 90. The cover component 90 is fitted onto the main body 10. This prevents the position limiting rod 53 from detaching from the main body 10 along the direction perpendicular to the axis L, and the cover component 90 can stabilize the position of the position limiting rod 53.

[0034] As shown in Figures 7 and 8, the difference between the second embodiment and the first embodiment of the present invention is that the first tooth component 51 has a plurality of first teeth 511 and a fitting hole 512, and the fitting hole 512 is fitted onto the insertion end 21 of the transmission rod 20. The second tooth component 52 is independent of the first tooth component 51. Therefore, the second embodiment also has the same effects as the first embodiment.

[0035] As described above, the present invention has the following advantages.

[0036] 1. The present invention effectively reduces the rotational friction force between the transmission rod 20 and the main body 10 by installing a single low-friction device 40 in combination with the first groove 22 and the second groove 321, thereby reducing wear and extending the service life. Although such effects are not immediately apparent, they are easily understood.

[0037] 2. The present invention forms an installation space S for housing a low-friction device 40 through a simple combination of a transmission rod 20 and a detachment prevention component 30, thereby reducing the complexity of the structural composition and achieving a reduction in overall manufacturing costs. While these effects are not immediately apparent, they are easily understood.

[0038] 3. The present invention provides an axial position limiting function that restricts the axial movement of the transmission rod 20 through the locking relationship between a plurality of spherical contact parts 41 and a stopper portion 3211. This achieves the effect of preventing the transmission rod 20 from detaching from the main body 10.

[0039] While the present invention has been described in terms of the best embodiment, those familiar with the art can make various forms of modifications without departing from the spirit and scope of the invention. Furthermore, the embodiments described above are used merely to illustrate the invention and do not limit the scope of implementation. Therefore, all modifications and changes made in accordance with the spirit of the invention shall be deemed to fall within the scope of the claims of the present invention. [Explanation of symbols]

[0040] 100 Torque Connecting Rod 10 Main Unit 11 First end 111 Second installation groove 12 Second end 121 Tool connection hole 13 Chambers 14 Screw holes 15 spring holes 16 Horizontal cave 20 transmission rods 21 Cutting edge 22 First groove 23 Tool connection end 30 Anti-detachment parts 31 Connection part 311 First installation groove 32 Stopper part 321 Second groove 3211 Stopper location 3212 Sloping setback area 40 Low friction device 41 Spherical contact parts 411 First half 412 Second half 50 Clutch device 51 First tooth component 511 First tooth 5111 First arc section 5111a First support part 5111b First smooth part 5112 First vertical section 512 Fitting hole 52 Second tooth component 521 Second tooth 5211 Second arc section 5211a Second support part 5211b Second smooth part 5212 Second vertical section 522 Long groove 53 Position restriction bar 60 Torque device 61 Fixing parts 62 Elastic components 70 Rings 80 Magnetic Components 90 Cover parts C Vertical axis L axis S Installation space R1 First outer diameter R2 Second outer diameter R3 Third outer diameter

Claims

1. A torque connecting rod comprising a main body, a transmission rod, a detachment prevention component, a low-friction device, a clutch device, and a torque device, The main body has a first end and a second end that are positioned opposite each other along the axis, The transmission rod is provided with an insertion end and a first groove, the insertion end is inserted into the first end along the axis, the first groove is provided around the peripheral edge of the transmission rod and is exposed on the outside of the first end. The aforementioned detachment prevention component comprises a connecting portion and a stopper portion that are connected to each other, the connecting portion is fitted to the first end, and the detachment prevention component cannot be detached from the main body along the axial direction, a second groove is provided on the inner edge of the stopper portion, and an installation space is formed by the second groove and the first groove. The low-friction device comprises a plurality of spherical contact components, the plurality of spherical contact components are covered by the detachment prevention component and installed within the installation space, the vertical axis of each spherical contact component is parallel to the axis and divides it into a first half and a second half, the first half is installed in the first recess so as to interfere in the axial direction, and the second half is installed in the second recess so as to interfere in the axial direction. The clutch device is provided within the main body and connected to the insertion end, and the clutch device can switch between a transmission state and a trip state. The torque device is installed inside the main body along the axis, and when the torque device presses against the clutch device with a preset torque, the clutch device enters a transmission state, and the transmission rod can easily transmit torque to the main body via the clutch device. When the torque received by the transmission rod exceeds a preset torque, the clutch device switches to the trip state, and the transmission rod is unable to transmit torque to the main body. Torque connecting rod.

2. The torque connecting rod according to claim 1, characterized in that the first groove completely covers the first half and the second groove covers at least a portion of the second half.

3. The torque connecting rod according to claim 2, characterized in that the second groove includes mutually connected stopper portions and inclined retraction portions, the stopper portions are in a locking relationship with the spherical contact parts, the spherical contact parts are steel balls, the stopper portions are arc-shaped and have a length smaller than the diameter of each of the spherical contact parts, and the first groove is an arc-shaped groove.

4. The torque connecting rod according to claim 2, further comprising a ring, wherein the ring is installed between the connecting portion and the first end.

5. The torque connecting rod according to claim 4, characterized in that the first end has a first outer diameter, the low friction device has a second outer diameter, the ring has a third outer diameter, the second outer diameter is smaller than the first outer diameter, and the second outer diameter is smaller than the third outer diameter.

6. The torque connecting rod according to claim 1, wherein the clutch device comprises a first tooth component and a second tooth component, the first tooth component and the insertion end of the transmission rod are integrally molded, the first tooth component is provided with a plurality of first teeth, the second tooth component is provided so as to slide in a chamber along the axis, the second tooth component is provided with a plurality of second teeth, and the second teeth can selectively engage with or disengage from the first teeth.

7. The torque connecting rod according to claim 1, wherein the clutch device comprises a first tooth component and a second tooth component independent of the first tooth component, the first tooth component comprises a fitting hole and a plurality of first teeth, the fitting hole is fitted into the insertion end of the transmission rod, a chamber is provided inside the main body, and the second teeth selectively engage with or disengage from the first teeth.

8. The torque connecting rod according to claim 6 or 7, wherein the clutch device further comprises a position limiting rod, a long groove is drilled in the peripheral edge of the second tooth component along the axis, a transverse hole is provided in the main body perpendicular to the axis, the position limiting rod is inserted into the transverse hole and the long groove, and when the clutch device is in the tripped state, the second tooth component simply moves along the axis.

9. The torque connecting rod according to claim 8, characterized in that each of the first teeth has a first arc portion and a first vertical portion, and each of the second teeth has a second arc portion and a second vertical portion, and when the first tooth meshes with the second tooth, each of the first arc portions is in close contact with each of the second arc portions, and each of the first vertical portions and each of the second vertical portions press against each other.

10. The torque device includes a fixed part and an elastic part, the end of the chamber away from the first end communicates with a screw hole and a spring hole, the fixed part is screwed into the screw hole, the elastic part is provided in the spring hole, one end of the elastic part presses against the clutch device and the other end presses against the fixed part, a magnet part is provided on the end of the torque device away from the first end, the torque connecting rod further includes a cover part, the cover part is fitted onto the main body so that the position limiting rod cannot detach from the main body along the direction perpendicular to the axis, as described in claim 9.

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