Torque Connecting Rod

Abstract

To provide a torque connecting rod which achieves the effect of reducing wear and increasing service life. [Solution] A transmission rod (20) is inserted into the body and surrounds a first groove (22) exposed to the outside of the body. A separation prevention element (30) is fitted into the body and has a second groove (321) on its inner edge, with the second groove (321) and the first groove forming an installation space. A low-friction device is installed in the installation space. A clutch device (50) is connected to the transmission rod and can switch between a transmission state and a trip state. When a torque device (60) presses the clutch device with a preset torque, the clutch device enters a transmission state, allowing the transmission rod to easily transmit torque to the body via the clutch device. When the torque received by the transmission rod exceeds the preset torque, the clutch device switches to a trip state, and the transmission rod is no longer able to transmit torque to the body.

Description

[Technical Field]

[0001] The present invention relates to a torque connecting rod, and more particularly to a torque connecting rod having low friction and a simple structure. [Background technology]

[0002] The torque driver disclosed in Patent Document 1 is primarily composed of components such as a main body, an outer cover, an upper fixed torque component, and a lower fixed torque component. The upper mating teeth of the upper fixed torque component and the lower mating teeth of the lower fixed torque component engage (interlock) and disengage (free rotation). However, the outer cover only covers the outside of the main body and does not limit its axial position, which raises the risk of it becoming detached from the main body. Furthermore, the torque driver's position limiting pin is located between the pin hole of the main body and the position limiting annular groove of the transmission component, which requires the creation of a separate corresponding hole during manufacturing, preventing effective reduction in the manufacturing cost of the torque driver. Furthermore, the large contact area between the position limiting pin and the outer cover results in abrasion and a shortened service life.

[0003] Furthermore, the bearing structure installed on both ends of the anti-slip surface structure disclosed in Patent Document 2 achieves the effect of reducing friction between components. However, this bearing structure can only be combined into one bearing structure by interlocking the low-friction component with the surrounding components, and Patent Document 2 still has problems such as the complexity of the overall structure and high manufacturing costs.

[0004] Furthermore, the bearing structure installed at both ends of the handle tube disclosed in Patent Document 3 is installed by mutually engaging steel balls and surrounding parts, which leaves problems of complexity in the overall structure and high manufacturing costs.

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

[0006] [Patent Document 1] Republic of China Utility Model No. M600678 [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] Republic of China Invention Patent No. I606896 Summary of the Invention [Problem to be solved by the invention]

[0007] SUMMARY OF THE INVENTION The primary object of the present invention is to overcome the problems of complex construction and high manufacturing costs associated with known torque connecting rods. [Means for solving the problem]

[0008] To achieve the above-mentioned objectives, a torque connecting rod provided using an embodiment of the present invention includes a body, a transmission rod, an anti-detachment part, a low-friction device, a clutch device, and a torque device. The main body has a first end and a second end arranged oppositely along the axis. The transmission rod has an insertion end and a first groove, the insertion end being inserted into the first end along the axis, and the first groove running around the periphery of the transmission rod and exposed to the outside of the first end. The anti-detachment piece has a connecting part and a stopper part connected to each other. The connecting part is fitted to the first end, and the anti-detachment piece cannot be detached from the main body along the axial direction. A second groove is formed on the inner edge of the stopper, and an installation space is formed by the second groove and the first groove. The low-friction device has a plurality of spherical contact pieces, which are covered by the anti-detachment piece and installed in the installation space. The longitudinal axis of each spherical contact piece is parallel to the axis and divides it into a first half and a second half, the first half being installed in the first groove so as to interfere with the axial direction, and the second half being installed in the second groove so as to interfere with the axial direction. The clutch device is disposed within the body and connected to the insertion end, and can be switched between a transmission state and a trip state. The torque device is disposed within the body along the axis, and when the torque device presses the clutch device with a preset torque, the clutch device enters a transmission state, allowing the transmission rod to easily transmit torque to the body via the clutch device. When the torque received by the transmission rod exceeds the preset torque, the clutch device enters a trip state, and the transmission rod can no longer transmit torque to the body.

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

[0010] Furthermore, the present invention forms an installation space for the low-friction device by engaging the transmission rod with the anti-detachment part, which not only prevents the spherical contact part of the low-friction device and the transmission rod from separating from the main body, but also simplifies the overall structure, facilitates quick assembly, and reduces the overall manufacturing costs. [Brief explanation of the drawings]

[0011] [Figure 1]1 is a perspective view of the appearance of a torque connecting rod according to a first embodiment of the present invention; [Figure 2] 1 is an exploded perspective view of a torque connecting rod according to a first embodiment of the present invention; FIG. [Figure 3] FIG. 2 is a cross-sectional view taken along the line AA in FIG. 1. [Figure 4] FIG. 4 is an enlarged view of a local portion of FIG. 3. [Figure 5] 1, showing the first tooth component and the second tooth component in a meshing position. [Figure 6] 1, showing the first tooth component and the second tooth component in a disengaged position. [Figure 7] FIG. 2 is an exploded perspective view of a torque connecting rod according to a second embodiment of the present invention. [Figure 8] FIG. 4 is a cross-sectional view of a torque connecting rod according to a second embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0012] In order to explain the core idea of ​​the invention described above, the following description will be given using specific embodiments. It should be noted in advance that the proportions of various parts in the embodiments are appropriate for the relevant description and are not based on the proportions of the actual parts.

[0013] As shown in FIGS. 1 to 6, a torque connecting rod 100 according to a first embodiment of the present invention includes a main body 10, a transmission rod 20, a separation prevention component 30, a low-friction device 40, a clutch device 50, and a torque device 60. The present invention is adapted for use in conjunction with a hand tool, which may be manual, electric, or pneumatic, to tighten a fastener and prevent improper positioning or overtightening of the fastener.

[0014] The body 10 has a first end 11 and a second end 12 disposed oppositely along an axis L. The first end 11 is used to connect to a transmission rod 20, which is connected to the hand tool described above. The first end 11 has a first outer diameter R1. The second end 12 is provided with a tool coupling hole 121. The tool coupling hole 121 is polygonal and is used to connect a tool head, which is connected to the fastening component.

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

[0016] The transmission rod 20 has an insertion end 21 and a first 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 groove 22 is formed around the periphery of the transmission rod 20 and is exposed to the outside of the first end 11. The first groove 22 is an arc-shaped groove.

[0017] 1 and 3, in the first embodiment of the present invention, the transmission rod 20 has a tool connecting end 23. The tool connecting end 23 is located away from the opposite insertion end 21, and the tool connecting end 23 is used to connect the aforementioned hand tool. Thus, the hand tool transmits torque to the body 10 via the tool connecting end 23 and the insertion end 21, and the body 10 rotates the fastening part via the tool head.

[0018] The anti-detachment part 30 includes a connecting part 31 and a stopper part 32 that are connected to each other. The connecting part 31 is fitted to the first end 11, so that the anti-detachment part 30 cannot be detached from the main body 10 along the axis L. The stopper part 32 has a second groove 321 on the inner edge thereof, and the second groove 321 and the first groove 22 form an installation space S, which is used to accommodate the low-friction device 40.

[0019] 3 and 4, in the first embodiment of the present invention, the second groove 321 includes a connecting stopper portion 3211 and an inclined recessed portion 3212. The stopper portion 3211 is in a locking relationship with the low-friction device 40, which prevents the transmission rod 20 from separating 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 can only rotate the main body 10 around the axis L. The stopper portion 3211 is arc-shaped.

[0020] The low-friction device 40 includes a plurality of spherical contact parts 41. The plurality of spherical contact parts 41 are covered by the separation prevention part 30 and installed in the installation space S. This allows the separation prevention part 30 to prevent separation of the plurality of spherical contact parts 41. The longitudinal axis C of each spherical contact element 41 is parallel to the axis L and divides the spherical contact element 41 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 with the first half 411 in the axial direction, and the second half 412 is installed in the second groove 321 so as to interfere with the first half 411 in the axial direction. The axial interference between each spherical contact element 41 and the first groove 22 and the second groove 321 provides an axial position limiting function that limits the axial movement of the driving rod 20. In one embodiment, the volumes of the first half 411 and the second half 412 are equal, allowing each spherical contact element 41 to be stably and balanced within the installation space S. In other embodiments, the volumes of the first half 411 and the second half 412 may be different.

[0021] The stopper portion 3211 is in a locking relationship with the spherical contact element 41. The spherical contact element 41 is a steel ball, and a plurality of the spherical contact elements 41 are arranged in a ring shape within the installation space S. Therefore, there is a multi-point contact between the transmission rod 20 and the low-friction device 40, and there is also a multi-point contact between the separation prevention element 30 and the low-friction device 40. As a result, when the transmission rod 20 rotates the main body 10, the plurality of spherical contact elements 41 can reduce friction and wear between the elements.

[0022] Additionally, the inclined recessed portion 3212 is inclined and recessed in a direction away from the low-friction device 40. Since the inclined recessed portion 3212 is not in contact with the low-friction device 40, the contact between the separation prevention component 30 and the low-friction device 40 is further reduced, thereby reducing frictional resistance.

[0023] 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. Furthermore, the length of the stopper portion 3211 is smaller than the diameter of each of the spherical contact elements 41. The second outer diameter R2 is the outer diameter obtained after the low-friction device 40 is properly placed 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 anti-detachment element 30 and the first end 11 of the main body 10. A first mounting groove 311 is formed inside the connecting portion 31, and a second mounting groove 111 is formed around the first end 11. The ring 70 is fitted into the first mounting groove 311 and the second mounting groove 111. This prevents the anti-detachment element 30 from being detached from the main body 10 along the axis 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 ring.

[0025] The clutch device 50 is disposed in the chamber 13 of the body 10 and is connected to the insertion end 21, and can be switched between a transmission state and a trip state. When the clutch device 50 is in a transmitting state, the hand tool transmits torque to the main body 10 via the transmission rod 20 and the clutch device 50, so that the main body 10 can rotate the fastening parts using the second end 12. On the other hand, when the clutch device 50 is in a tripped state, the clutch device 50 experiences a tooth skipping phenomenon, and the hand tool is unable to smoothly transmit torque to the main body 10 via the transmission rod 20 and the clutch device 50 and prevent excessive rotation of the fastening parts.

[0026] 3 to 6, in a first embodiment of the present invention, a clutch device 50 includes a first toothed element 51 and a second toothed element 52. The first toothed element 51 and the insertion end 21 of the transmission rod 20 are integrally molded, and the first toothed element 51 remote from the tool connecting end 23 is provided with a plurality of first teeth 511. The second toothed element 52 is provided to slide in the chamber 13 along the axis L. The second toothed element 52 is provided with a plurality of second teeth 521, and the second teeth 521 are selectively engaged with or disengaged from the first teeth 511.

[0027] When the clutch device 50 is in a transmission state, the first tooth component 51 and the second tooth component 52 are stably in the meshed position (see FIG. 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 a tripped state, a tooth skip phenomenon 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 are repeatedly switched between the meshed position and the disengaged position (see FIG. 6), and the torque of the hand tool cannot be continuously transmitted to the main body 10.

[0028] 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 horizontal hole 16 is provided in the body 10 perpendicular to the axis L. The position limiting rod 53 is inserted into the horizontal hole 16 and the long groove 522, and is used to limit the second tooth component 52 to only moving along the axis L and not rotating when the clutch device 50 is in a tripped state.

[0029] 3 to 6, in the first embodiment of the present invention, each first tooth 511 has a first arcuate portion 5111 and a first vertical portion 5112, and each second tooth 521 has a second arcuate portion 5211 and a second vertical portion 5212. When the first tooth 511 meshes with the second tooth 521, the first arcuate portions 5111 are in close contact with the second arcuate portions 5211, and the first vertical portions 5112 and the second vertical portions 5212 press against each other. Due to the pressing relationship between the first vertical portions 5112 and the second vertical portions 5212, the first tooth component 51 can maintain rotation in a single direction.

[0030] 3 to 6 , the first arc-shaped portion 5111 further includes a first support portion 5111a and a first smooth portion 5111b, and the second arc-shaped portion 5211 further includes a second support portion 5211a and a second smooth portion 5211b. When the clutch device 50 is in a tripped state, the first support portion 5111a and the second support portion 5211a press and support the first toothed element 51, causing it to move from the engaged position to the disengaged position, and the first smooth portion 5111b and the second smooth portion 5211b allow the first toothed element 51 to move smoothly from the disengaged position to the engaged position, reducing the impact force generated by the positional difference and increasing the service life of the clutch device 50.

[0031] The torque device 60 is installed within the body 10 along the axis L. The torque device 60 presses 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 body 10 via the clutch device 50. This also rotates the associated fastening components, completing the fastening installation process for the fastening components. Furthermore, when the torque received by the transmission rod 20 during operation exceeds the preset torque, the clutch device 50 switches to a trip state, preventing the transmission rod 20 from transmitting torque to the body 10, thereby preventing damage to the fastening components due to overtightening.

[0032] 3, in the first embodiment of the present invention, the chamber 13 has an end remote from the first end 11 communicating with the threaded hole 14 and the spring hole 15. The chamber 13 is used to accommodate the clutch device 50. The threaded hole 14 and the spring hole 15 are used to accommodate the torque device 60. The torque device 60 includes a fixed part 61 and an elastic part 62. The fixed part 61 is screwed into the screw hole 14. The elastic part 62 is mounted in the spring hole 15. One end of the elastic part 62 presses against the clutch device 50, and the other end presses against the fixed part 61, thereby transmitting a preset torque to the clutch device 50. In addition, a magnet part 80 is mounted on the torque device 60 away from the first end 11. The magnet part 80 is located at the inner end of the tool coupling hole 121 and is used to attract the fastening part.

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

[0034] 7 and 8, the second embodiment of the present invention differs from the first embodiment in that the first tooth element 51 has a plurality of first teeth 511 and a fitting hole 512, and the fitting hole 512 is fitted into the insertion end 21 of the transmission rod 20. The second tooth element 52 is independent of the first tooth element 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 between the driving rod 20 and the main body 10 by combining the single low-friction device 40 with the first groove 22 and the second groove 321, thereby achieving the effects of reducing wear and increasing the service life. This effect is not obvious on the surface, but is easily understandable.

[0037] 2. The present invention forms an installation space S for accommodating the low-friction device 40 through a simple combination of the transmission rod 20 and the anti-detachment part 30, thereby reducing the complexity of the structure and achieving the effect of reducing the overall manufacturing cost. This effect is not obvious on the surface, but is easily understood.

[0038] 3. The present invention provides an axial position limiting function that limits the axial movement of the driving rod 20 through the interlocking relationship between the plurality of spherical contact elements 41 and the stopper portions 3211. This prevents the driving rod 20 from coming off the main body 10.

[0039] Although the present invention has been described using the best embodiment, those skilled in the art can make various modifications without departing from the spirit and scope of the present invention. Furthermore, the above-described embodiment is merely used to explain the present invention and does not limit the scope of the present invention. Therefore, all various modifications and changes made without departing from the spirit of the present invention are considered 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 Chamber 14 screw holes 15 spring hole 16 Horizontal Cave 20 Transmission rod 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 Slope setback area 40 Low friction device 41 Spherical contact parts 411 First half 412 Second half 50 Clutch device 51 First tooth part 511 First tooth 5111 First arc 5111a First support part 5111b First smooth part 5112 First vertical section 512 Fitting hole 52 Second tooth part 521 Second tooth 5211 Second arc section 5211a Second support part 5211b Second smooth part 5212 Second vertical section 522 Nagamizo 53 Position limiting rod 60 Torque Device 61 Fixing parts 62 Elastic parts 70 Ring 80 Magnet parts 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 including a main body, a transmission rod, a separation prevention part, a low-friction device, a clutch device, and a torque device, The body has a first end and a second end disposed opposite to each other along an 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 formed around the periphery of the transmission rod and exposed to the outside of the first end; the anti-detachment part has a connecting part and a stopper part connected to each other, the connecting part is fitted to the first end, and the anti-detachment part cannot be detached from the main body along the axial direction, and a second groove is formed on an inner edge of the stopper part, and an installation space is formed by the second groove and the first groove; The low-friction device includes a plurality of spherical contact pieces, each of which is covered by the anti-detachment piece and installed in the installation space, the longitudinal axis of each of the spherical contact pieces being parallel to the axis and dividing the spherical contact pieces into a first half and a second half, the first half being installed in the first groove so as to interfere with the first half in the axial direction, and the second half being installed in the second groove so as to interfere with the second half in the axial direction; The clutch device is disposed in the main body and connected to the installation end, and the clutch device can be switched between a transmission state and a trip state; The torque device is installed in the main body along the axis, and when the torque device presses the clutch device with a preset torque, the clutch device is in a transmission state, and the transmission rod easily transmits 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 the trip state, and the transmission rod is unable to transmit torque to the main body. Torque connecting rod.

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

3. 3. The torque connecting rod according to claim 2, wherein the second groove includes a stop portion and a sloped recess portion connected to each other, the stop portion is in a locking relationship with the spherical contact element, the spherical contact element is a steel ball, the stop portion is arc-shaped, and the length is smaller than the diameter of each of the spherical contact elements, and the first groove is an arc-shaped groove.

4. 3. The torque connecting rod according to claim 2, wherein the torque connecting rod further comprises a ring, the ring being disposed between the connecting portion and the first end.

5. 5. The torque connecting rod of claim 4, wherein the first end has a first outer diameter, the low-friction device has a second outer diameter, and the ring has a third outer diameter, the second outer diameter being smaller than the first outer diameter, and the second outer diameter being smaller than the third outer diameter.

6. 2. The torque connecting rod according to claim 1, wherein the clutch device comprises a first toothed element and a second toothed element, the first toothed element and the inserted end of the transmission rod being integrally molded, the first toothed element having a plurality of first teeth, the second toothed element being slidable in a chamber along the axis, and the second toothed element having a plurality of second teeth, the second teeth being selectively engaged with or disengaged from the first teeth.

7. 2. The torque connecting rod according to claim 1, wherein the clutch device comprises a first toothed element and a second toothed element independent of the first toothed element, the first toothed element having a fitting hole and a plurality of first teeth, the second toothed element having a plurality of second teeth, the fitting hole being fitted into the inserted end of the transmission rod, a chamber being formed within the body, and the second teeth selectively engaging or disengaging with the first teeth.

8. 8. The torque connecting rod according to claim 6 or 7, wherein the clutch device further comprises a position limiting rod, wherein a long groove is drilled along the axis on the peripheral edge of the second toothed part, and a horizontal hole is formed in the main body perpendicular to the axis, the position limiting rod is inserted into the horizontal hole and the long groove, and when the clutch device is in the trip state, the second toothed part only moves along the axis.

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

10. 10. The torque connecting rod of claim 9, wherein the torque device includes a fixed part and an elastic part, the chamber being connected to a threaded hole and a spring hole at the end remote from the first end, the fixed part being threaded into the threaded hole, the elastic part being installed in the spring hole, one end of the elastic part pressing against the clutch device and the other end pressing against the fixed part, a magnet part being installed at the end remote from the first end of the torque device, and the torque connecting rod further includes a cover part, which is fitted onto the main body, preventing the position limiting rod from detaching from the main body in the direction perpendicular to the axis.

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