TWI510725B - Universal joint - Google Patents

Description

Universal joint

The invention relates to a transmission device, in particular to a universal joint.

The conventional universal joint is generally composed of two transmission blocks and a cross shaft. However, the application of the cross shaft makes the universal joint have a small running angle, the work is not stable enough, the rigidity is low, and the life is short when operating at a large angle.

In view of the above, it is necessary to provide a universal joint having a large operating angle, a large torsional rigidity, a smooth operation, and a simple structure.

A universal joint comprising a two-transmission assembly and a pivoting member, the pivoting member comprising a cylindrical body and a hemisphere protruding from the two ends of the main body; the circumferential sides of the pivoting member are recessed from each other There are four arc-shaped pivoting slots; the four arc-shaped pivoting slots are oppositely recessed on the outer peripheral side of the pivoting member, and the two ends of each of the arcuate pivoting slots respectively extend to intersect the vertex of the hemisphere Wherein, the bottom of each of the arcuate pivoting grooves is an arcuate cylindrical surface, and the two transmission components are respectively disposed at two ends of the pivoting member, and are rotatably mounted together by the pivoting member; The transmission assembly includes two transmission blocks, and one end of the two transmission blocks is oppositely disposed and pivotally connected to the opposite pivoting slots of the pivoting member and located at the same end of the pivoting member, wherein each transmission block includes a clamping And a pivoting arm protrudingly disposed on the clamping seat, wherein the pivoting arm is provided with a V-shaped mounting groove corresponding to the arcuate pivoting groove on the pivoting member, and the pivoting arm correspondingly engages the pivot In the arcuate pivoting groove on the connector, the The mounting groove of the pivoting arm abuts against the bottom surface of the pivoting groove correspondingly, and the bottom surface of the mounting groove and the bottom surface of the pivoting groove are always tangential.

The universal joint has a simple structure, and by using a pivoting member instead of the conventional cross shaft, the working contact area of the transmission component and the pivoting member and the operating angle of the transmission component are effectively increased, and the running rigidity and stability of the transmission component are enhanced. Extends the service life of the universal joint.

100‧‧‧ universal joint

10‧‧‧ pivotal parts

11‧‧‧ Subject

15‧‧‧ pivot slot

16‧‧‧hemisphere

30‧‧‧Transmission components

31‧‧‧Transport block

310‧‧‧Mounting holes

311‧‧‧Clamping seat

3111‧‧‧ top

3112‧‧‧Fixed holes

3113‧‧‧Clamping end

3115‧‧‧ card block

3117‧‧‧ card slot

3119‧‧‧ Groove

315‧‧‧ pivot arm

317‧‧‧Assemble

33‧‧‧Elastic pad

333‧‧‧through hole

335‧‧‧ openings

35‧‧‧ screws

37‧‧‧ nuts

39‧‧‧Flexible washers

1 is an exploded perspective view of a universal joint according to an embodiment of the present invention.

2 is a perspective assembled view of a universal joint according to an embodiment of the present invention.

The universal joint of the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

Referring to FIG. 1 and FIG. 2 simultaneously, the universal joint 100 includes a pivoting member 10 and two transmission assemblies 30. In this embodiment, the pivoting member 10 has a substantially spherical shape, and includes a main body 11 having a substantially cylindrical shape and a hemispherical body 16 protruding from the two ends of the main body 11. The outer peripheral side of the pivoting member 10 is uniformly recessed with four long arc-shaped pivoting slots 15 , wherein the four arcuate pivoting slots 15 are opposite to each other, and the two ends of each of the arcuate pivoting slots 15 are respectively The extension intersects to the apex position of the hemisphere 16. The bottom of each arcuate pivoting groove 15 is an arcuate cylindrical surface.

The two transmission assemblies 30 are respectively disposed at two ends of the pivoting member 10 and are rotatably mounted together by the pivoting member 10. Each of the transmission assemblies 30 includes two transmission blocks 31, two elastic pads 33, screws 35, nuts 37, and spring washers 39. The two transmission blocks 31 are snap-fitted to face each other, and are fixed to each other by a screw 35 nut 37 and a spring washer 39. The two elastic pads 33 are correspondingly clamped between the two transmission blocks 31. In the preferred embodiment, the screw 35. The number of the nut 37 and the elastic washer 39 are two.

Each of the transmission blocks 31 includes a clamping seat 311 and a pivoting arm 315 protruding from the clamping seat 311. The clamping seat 311 has a substantially semi-circular hollow cylindrical shape, and includes a circular arc-shaped top portion 3111 and two clamping end portions 3113 disposed opposite to each other. A fixing hole 3112 is formed through the arc top portion 3111. In the present embodiment, the fixing holes 3112 are two, and are opened at intervals along the axial direction of the clamping seat 311 to open on the arc top portion 3111. One end of the clamping end portion 3113 has a strip-shaped block 3115 protruding in the axial direction, and the end surface of the other clamping end portion 3113 is recessed in the axial direction to be equivalent to the size of the strip-shaped block 3115. The strip card slot 3117. The outer circumferential surface of the clamping seat 311 is recessed adjacent to the semicircular groove 3119 disposed around the outer circumferential surface.

The pivoting arm 315 is substantially elongated, and the arcuate pivoting groove 15 corresponding to the pivoting member 10 protrudes from the axial direction of the clamping seat 311 at a substantially central position on the cross section of the clamping seat 311. The length of the pivoting arm 315 is equivalent to the length of the arcuate pivoting groove 15 of the pivoting member 10. The inner surface of the pivoting arm 315 is recessed adjacent to the curved cylindrical bottom surface of the pivoting groove 15 of the end corresponding pivoting member 10. There is a substantially V-shaped fitting groove 317, and the bottom of the fitting groove 317 is a curved surface.

The two elastic pads 33 are substantially rectangular-shaped, and the outer dimensions thereof are equivalent to the end faces of the clamping end portions 3113 of the clamping seat 311, so that when the two transmission blocks 31 are assembled with each other, the two elastic pads are correspondingly clamped to the two. The two ends of the clamping seat 311 are sandwiched between the end faces 3113. A rectangular through hole 333 is formed through the strip-shaped block 3115 or the strip-shaped latching groove 3117 on the end surface of the elastic pad 33 corresponding to the clamping end portion 3113. One side of the elastic pad 33 is adjacent to the edge of the corresponding clamping seat 311. The two grooves 3119 are open to the second opening 335 at intervals.

When assembling, the pivoting arm 315 of the second transmission block 31 is firstly clamped and pivoted to the ground. The two clamping members 10 are opposite to the pivoting slots 15 , and the clamping seats 311 of the two transmission blocks 31 are engaged with each other and at the same end of the pivoting member 10 . The bottom surface of the mounting groove 317 of the pivoting arm 315 is correspondingly rotatably abutted against the bottom surface of the pivoting groove 15 of the pivoting member 10, that is, the bottom surface of the mounting groove 317 is always tangential to the bottom surface of the pivoting groove 15. The strip-shaped block 3115 and the strip-shaped card slot 3117 at the two ends of one of the clamping seats 311 are respectively engaged with the strip-shaped card slot 3117 and the strip-shaped card block 3115 at the two ends of the other clamping seat 311. The two elastic pads 33 are respectively clamped between the end faces of the two clamping end portions 3113 of the two clamping seats 311. The two clamping seats 311 together define a cylindrical mounting hole 310. The two screws 35 respectively pass through the two fixing holes 3112 of one of the clamping seats 311 and protrude from the two fixing holes 3112 of the other clamping seat 311. The two nuts 37 are respectively screwed to the two screws along with the two elastic washers 39. At the end of 35, the two transmission blocks 31 are fixedly mounted together. Next, the other two transmission blocks 31 are oppositely disposed in the other two opposite pivoting slots 15 of the pivoting member 10, and are located at the other end of the pivoting member 10, that is, the assembly of the universal joint 100 is completed. The two transmission assemblies 30 are rotatably mounted together by the pivoting member 10.

When the universal joint 100 is used, the clamping seat 311 of the transmission assembly 30 of the two ends is respectively fixed to an external device (not shown), and the two transmission components 30 are relatively rotated by the pivoting member 10, and can be more Stay at the angle and position.

The universal joint 100 has a simple structure. By using the pivoting member 10 instead of the conventional cross shaft, the working contact area of the transmission assembly 30 and the pivoting member 10 and the operating angle of the transmission assembly 30 are effectively increased, and the transmission assembly 30 is enhanced. The rigidity and smoothness of the operation extend the service life of the universal joint 100.

In summary, the present invention has indeed met the requirements of the invention patent, and has filed a patent application according to law. However, the above description is only a preferred embodiment of the present invention, and the scope of the present invention is not limited to the above embodiments, and those skilled in the art can assist the present invention. Equivalent modifications or variations made by the spirit of the spirit are to be included in the scope of the following claims.

100‧‧‧ universal joint

10‧‧‧ pivotal parts

15‧‧‧ pivot slot

30‧‧‧Transmission components

31‧‧‧Transport block

310‧‧‧Mounting holes

311‧‧‧Clamping seat

315‧‧‧ pivot arm

35‧‧‧ screws

37‧‧‧ nuts

Claims (8)

A universal joint comprising a two-transmission assembly and a pivoting member, wherein the pivoting member comprises a cylindrical body and a hemisphere protruding from the two ends of the main body; the circumferential sides of the pivoting member are mutually Four arc-shaped pivoting slots are recessed at intervals; the four arc-shaped pivoting slots are oppositely recessed on the outer peripheral side of the pivoting member, and the two ends of each of the arcuate pivoting slots respectively extend to intersect the hemisphere At the apex position of the body, the bottom of each of the arcuate pivoting grooves is an arcuate cylindrical surface, and the two transmission components are respectively disposed at two ends of the pivoting member, and are relatively rotatably mounted by the pivoting member Each of the transmission components includes two transmission blocks, and one end of the two transmission blocks is oppositely disposed and pivotally connected to the opposite pivoting slots of the pivoting member and located at the same end of the pivoting member, wherein each transmission The block includes a clamping seat and a pivoting arm protrudingly disposed on the clamping seat. The pivoting arm of the pivoting arm is correspondingly provided with a V-shaped mounting groove corresponding to the arcuate pivoting groove on the pivoting member, the pivoting arm corresponding to the pivoting arm Engaging in the arcuate pivoting groove on the pivoting member, the mounting groove of the pivoting arm correspondingly rotatably abuts the pivoting The bottom surface of the groove, and the bottom surface of the fitting groove is always tangent to the bottom surface of the pivot groove. The universal joint according to claim 1, wherein the four-arc pivotal groove is elongated. The universal joint according to claim 1, wherein the pivoting member is in the shape of a ball. The universal joint according to claim 1, wherein the bottom surface of the fitting groove is a curved surface. The universal joint according to claim 1, wherein the clamping seat has a semicircular hollow cylinder shape, and comprises a circular arc top portion and two oppositely disposed clamping end portions, wherein one clamping end portion a clamping block is protruded from the end surface, and a clamping groove is recessed on the end surface of the other clamping end; the two transmission blocks of the transmission component are engaged by the clamping seat, and a circle is formed between the two clamping seats Shape mounting holes. The universal joint according to claim 5, wherein a fixing hole is formed in a top of each of the clamping seats, the transmission component further comprises a screw and a nut, and the screw corresponds to the two clamping seats. The fixing hole is screwed to the nut, and the two clamping seats are fixedly mounted together. The universal joint of claim 5, wherein the transmission assembly further comprises two elastic pads, the elastic pads being respectively clamped between the two transmission blocks. The universal joint of claim 5, wherein the transmission assembly further comprises a resilient washer that is screwed to the end of the screw with the nut to securely mount the two clamping blocks together.