Self-locking handle and self-locking folding joint

Abstract

The application discloses a self-locking handle, which comprises a handle body, a top rod, a reset spring and a pressing rod, one end of the handle body is provided with an eccentric cam, the eccentric cam is provided with an eccentric hole, the top rod is rotatably hinged to the handle body, the pressing rod is arranged in the handle body, the reset spring is arranged between the pressing rod and the handle body, one end of the pressing rod extends out of the handle body, and the top rod is obliquely hinged to the handle body; when the reset spring drives the pressing rod to reset, the pressing rod abuts against one end of the top rod, the pressing rod is pressed, the pressing rod moves against the elastic force of the reset spring and is separated from the top rod. The self-locking handle disclosed by the application has the effect of self-locking and good safety. The application further discloses a self-locking folding joint.

Description

Technical Field

[0001] This invention relates to mechanical connection structures, and more specifically, to a self-locking handle and a self-locking folding joint for folding bicycles and folding electric vehicles. Background Technology

[0002] Folding bicycles are lightweight and compact when folded, making them easy to carry when going up and down elevators, taking buses, or riding the subway. They can be unfolded and used on the road, making travel convenient. They can also be placed in the trunk of a car, allowing you to experience the convenience of a car while enjoying the fun of cycling in nature during outings.

[0003] Folding joints are an important component of folding bicycles. Folding bicycles use folding joints to enable the bicycle to be folded or unfolded quickly, reducing the size of the bicycle and making it easier to store or transport.

[0004] Chinese patent document CN201559767U discloses a folding joint, including an upper connecting plate and a lower connecting plate hinged to one side by a hinge shaft. A handle is hinged to the other side of the lower connecting plate, and a ball joint is hinged to the front end of the handle. A ball joint seat is fixed to the other side of the upper connecting plate. The ball joint is pressed into the ball joint seat by the ball joint, thereby closing and locking the upper and lower connecting plates. This folding joint achieves the closing and locking of the upper and lower connecting plates by the ball joint seat passing over the dead point. Rotating the ball joint opens the upper and lower connecting plates, but it does not have a self-locking effect, which can easily cause safety accidents. Summary of the Invention

[0005] The purpose of this invention is to provide a self-locking handle that can achieve self-locking and has good security.

[0006] The technical solution adopted by the self-locking handle disclosed in this invention is:

[0007] A self-locking handle includes a handle body and a push rod. One end of the handle body is provided with an eccentric cam, and the eccentric cam has an eccentric hole. The push rod is rotatably hinged to the handle body. The handle body also includes a return spring and a pressing rod. The pressing rod is located in the handle body, and the return spring is located between the pressing rod and the handle body. One end of the pressing rod extends out of the handle body. The push rod is inclinedly hinged to the handle body. When the return spring drives the pressing rod to return to its original position, the pressing rod presses against one end of the push rod, pressing down the pressing rod. The pressing rod moves against the elastic force of the return spring and disengages from the push rod.

[0008] As a preferred embodiment, one end of the push rod is provided with a limiting part and the other end is provided with a tightening part. The pressing rod is provided with a pressing part, a rod part and an abutting part. The limiting part and the rod part have a gap, and the limiting part and the abutting part cooperate.

[0009] As a preferred embodiment, the opposite sides of the limiting part and the abutting part are both arc-shaped surfaces.

[0010] As a preferred embodiment, the side of the abutting portion facing away from the limiting portion is a plane.

[0011] As a preferred embodiment, the clamping part of the push rod is an arc surface.

[0012] As a preferred embodiment, the handle body has a cavity, a mounting hole is provided on one side wall of the handle body, the pressing rod is disposed in the mounting hole, and the pressing part extends out of the mounting hole.

[0013] As a preferred embodiment, the end face of the abutment portion is provided with a countersunk hole, one end of the return spring is disposed in the countersunk hole, and the other end abuts against the handle body.

[0014] As a preferred embodiment, the self-locking handle also includes a return elastic element. The push rod is provided with a recessed groove, which is located on the side of the push rod facing the bottom surface of the handle body. One end of the return elastic element is located in the recessed groove, and the other side abuts against the bottom surface of the handle body.

[0015] As a preferred embodiment, the self-locking handle further includes a torsion spring and a self-locking ring. The eccentric cam is provided with a central dividing groove, which divides the eccentric hole on the eccentric cam. The self-locking ring is disposed in the central dividing groove. The self-locking ring is provided with a rotating part in the middle, and the rotating part is provided with a through hole corresponding to the eccentric hole on the eccentric cam. One end of the self-locking ring is provided with a self-locking part, and the other end is provided with a return part. The self-locking ring is hinged to the eccentric cam through the through hole. The torsion spring is used to rotate the self-locking part of the self-locking ring to one side.

[0016] The beneficial effects of the self-locking handle disclosed in this invention are as follows: The push rod is inclinedly hinged to the handle body. When the handle is rotated, the push rod rotates accordingly and abuts against the push rod locking member of the first joint. The end of the push rod that abuts against the push rod locking member is blocked. The push rod continues to rotate with the handle body and rotates relative to the handle body. When the push rod passes the dead point, the push rod and the push rod locking member lock each other. At this time, the pressing rod, under the action of the return spring, presses against one end of the push rod, preventing the push rod from rotating relative to the handle body. This gives the self-locking handle a self-locking effect, preventing the self-locking handle from loosening. Pressing down the pressing rod causes it to move against the elastic force of the return spring, disengaging the pressing rod from the push rod. The push rod can then rotate relative to the handle body. When the handle body is rotated, the end of the push rod that abuts against the push rod locking member remains stationary. At the same time, the push rod rotates relative to the handle body, causing the compression between the push rod and the push rod locking member to slowly loosen. Continuing to rotate the handle body, the push rod rotates with the handle body and disengages from the push rod locking member. By moving the pressing rod relative to the top rod, the pressing rod can be pressed against or disengaged from the top rod, achieving a self-locking effect.

[0017] Another objective of this invention is to provide a self-locking folding connector that can achieve self-locking and has good safety.

[0018] The technical solution adopted by the self-locking folding joint disclosed in this invention is:

[0019] A self-locking folding joint includes a first joint and a second joint, wherein one side of the first joint is hinged to one side of the second joint, characterized in that it further includes a self-locking handle, wherein an eccentric cam of the self-locking handle is hinged to the other side of the second joint, and the first joint is provided with a push rod locking member, wherein the push rod locking member corresponds to the push rod on the self-locking handle.

[0020] The beneficial effects of the self-locking folding joint disclosed in this invention are as follows: The push rod is inclinedly hinged to the handle body. When the handle is rotated, the push rod rotates accordingly and abuts against the push rod locking member of the first joint. The end of the push rod that abuts against the push rod locking member is blocked. The push rod continues to rotate with the handle body and rotates relative to the handle body. When the push rod passes the dead point, the push rod and the push rod locking member lock each other. At this time, under the action of the return spring, the pressing rod presses against one end of the push rod, preventing the push rod from rotating relative to the handle body. This gives the self-locking handle a self-locking effect, preventing the self-locking handle from loosening. Pressing down the pressing rod causes it to move against the elastic force of the return spring, disengaging the pressing rod from the push rod. The push rod can then rotate relative to the handle body. When the handle body is rotated, the end of the push rod that abuts against the push rod locking member remains stationary. At the same time, the push rod rotates relative to the handle body, causing the compression between the push rod and the push rod locking member to slowly loosen. Continuing to rotate the handle body, the push rod rotates with the handle body and disengages from the push rod locking member. By moving the pressing rod relative to the top rod, the pressing rod can be pressed against or disengaged from the top rod, achieving a self-locking effect. Attached Figure Description

[0021] Figure 1 This is a three-dimensional schematic diagram of the self-locking folding joint of the present invention;

[0022] Figure 2 This is an exploded view of the self-locking folding joint of the present invention;

[0023] Figure 3 This is a schematic diagram of the handle body of the self-locking folding connector of the present invention;

[0024] Figure 4 This is a schematic diagram of the top rod of the self-locking folding joint of the present invention;

[0025] Figure 5 This is a schematic diagram of the pressing rod of the self-locking folding joint of the present invention;

[0026] Figure 6 This is a schematic diagram of the self-locking ring of the self-locking folding joint of the present invention. Detailed Implementation

[0027] The present invention will be further described and illustrated below with reference to specific embodiments and the accompanying drawings:

[0028] Please refer to Figure 1 and Figure 2 A folding connector includes a first connector 20, a second connector 30, and a self-locking handle 10. One side of the first connector 20 is hinged to one side of the second connector 30, and the self-locking handle 10 is hinged to the other side of the second connector 30.

[0029] The first connector 20 has a first hinge lug 21 on one side, with a hinge hole on the first hinge lug 21, and a boss 22 on the other side. The boss 22 has an adjustment hole, which is a threaded hole. A locking member is installed in the adjustment hole. In this embodiment, the locking member is a ball head rod 24. One end of the ball head rod 24 is a ball-shaped arc surface, and the other end is a connecting rod. The connecting rod has external threads. The ball head rod 24 is adjusted in position in the adjustment hole of the boss 22 by the connecting rod. A fastening nut 23 is provided on the connecting rod. Rotating the fastening nut 23 on the connecting rod of the ball head rod 24 causes the fastening nut 23 to abut against the upper surface of the boss 22, fixing the ball head rod 24 and preventing it from rotating or moving in the adjustment hole of the boss 22 when it is squeezed in the axial direction of the adjustment hole. A self-locking hole is provided below the boss 22.

[0030] The second connector 30 has a second hinge ear 31 on one side, and a hinge hole on the second hinge ear 31. The other side has a third hinge ear 32, and a hinge hole on the third hinge ear 32.

[0031] The first hinge lug 21 on the first connector 20 and the second hinge lug 31 on one side of the second connector 30 are hinged together by a hinge shaft 40, which passes through the hinge hole on the first hinge lug 21 and the hinge hole on the second hinge lug 31. The first connector 20 can rotate about the hinge shaft 40 relative to the second connector 30.

[0032] Please refer to Figure 2 The self-locking handle 10 includes a handle body 11, a pressing rod 12, a push rod 13, a pin 14, a self-locking ring 15, a torsion spring 16, a return spring, a return elastic element, and a hinge 17. The return spring and the return elastic element are not shown in the figure.

[0033] Please refer to Figure 3The handle body 11 has an eccentric cam 114 at one end and a cavity 111 at the other end. The push rod 13 is located in the cavity 111. The cavity 111 of the handle body 11 has two side walls 112 and a bottom surface 113. One side wall 112 has a mounting hole 115, and the outer side of the other side wall 112 has a handle portion 117. The two side walls 112 have pin holes 116. The pressing rod 12 is located in the mounting hole 115, and the pin 14 is located in the pin hole 116. The push rod 13 is inclinedly hinged to the handle body 11 through the pin 14. The eccentric cam 114 has an eccentric hole 1141 and a middle dividing groove 1142. The middle dividing groove 1142 divides the eccentric hole 1141 on the eccentric cam. The outer side of the eccentric cam 114 has a support portion 1143. The handle body 11 is hinged to the second connector 30 by a pin 17 passing through the eccentric hole 1141 on the eccentric cam 114 and the hinge hole of the third hinge ear 32 on the second connector 30.

[0034] Please refer to Figure 4 One end of the push rod 13 is provided with a limiting part 132. One side 1321 of the limiting part 132 is an arc-shaped surface, and the other end is provided with a tightening part 133. The tightening part 133 is an arc-shaped surface. In this embodiment, the tightening part 133 is an arc-shaped inner groove, which is used to cooperate with the arc-shaped ball head surface of one end of the ball head rod 24. The middle part of the push rod 13 is provided with a pin hole 131 and a recess 134. The pin 14 passes through the pin hole 131 to hinge the push rod 13 to the cavity 111 of the handle body 11. The recess 134 faces the bottom surface 113 of the handle body 11. One end of the return elastic member is provided in the recess 134, and the other side abuts against the bottom surface 113 of the handle body 11. The return elastic member makes the push rod 13 slightly tilted.

[0035] Please refer to Figure 5The pressing rod 12 is provided with a pressing part 121, a rod part 122 and an abutting part 123. The pressing part 121 and the abutting part 123 are respectively provided at both ends of the rod part 122. The rod part 122 of the pressing rod 12 is provided in the mounting hole 115 of one side wall 112. The pressing part 121 extends out of the mounting hole 115. The cross-sectional dimension of the rod part 122 is slightly smaller than the diameter of the mounting hole 115. The cross-sectional dimensions of the pressing part 121 and the cross-sectional dimensions of the abutting part 123 are larger than the diameter of the mounting hole 115, so that the pressing rod 12 is reliably provided in the mounting hole 115 and the pressing rod 12 is prevented from falling out. In specific implementation, the pressing rod 12 consists of a section with a pressing part 121 and a connecting part threadedly connected to the other end of the rod part 122 and the abutment part 123. The connecting part has external threads, and the rod part 122 has internal threads. The two sections are connected by threads to form the pressing rod 12, which is set in a hole-shaped mounting hole. In other embodiments, the mounting hole is semi-circular, and the rod part 122 of the pressing rod 12 is set in the mounting hole. There are many specific embodiments, such as the rod part 122 being welded to the pressing part 121 after being set in the mounting hole, which will not be described in detail here. The end face of the abutment part 123 has a countersunk hole, which is not shown in the figure. One end of the return spring is set in the countersunk hole, and the other end abuts against the other side wall 112 of the handle body 11. The return spring causes the pressing rod 12 to extend towards the mounting hole 115. One side of the abutment portion 123 is an arc-shaped surface 1231, which mates with the arc-shaped surface of the upper limit portion 132 of the push rod 13. The other side is a flat surface 1232. The flat surface 1232 on the other side of the abutment portion 123 is attached to the bottom surface 113 of the handle body 11. The pressing rod 12 is radially fixed relative to the handle body 11, that is, the pressing rod 12 cannot rotate relative to the handle body 11, but can only move relative to it.

[0036] The limiting part 132 of the push rod 13 prevents the pressing rod 12 from deflecting at a large angle. That is, the limiting part 132 of the push rod 13 causes the pressing rod 12 to be close to the bottom surface 113 of the handle body 11. Since the cross-sectional dimension of the abutment part 123 is larger than the cross-sectional dimension of the rod part 122, when the return spring moves the abutment part 123 of the pressing rod 12 to the limiting part 132 of the push rod 13, the arc-shaped surface 1231 on one side of the abutment part 123 fits against the limiting part 132 of the push rod 13, preventing the push rod 13 from being limited. The positioning part 132 rotates toward the bottom surface 113 of the handle body 11. When the pressing rod 12 moves against the elastic force of the return spring, so that the rod part 122 of the pressing rod 12 corresponds to the limiting part 132 of the top rod 13, since the cross-sectional dimension of the rod part 122 of the pressing rod 12 is smaller than the cross-sectional dimension of the abutment part 123, there is a gap between the limiting part 132 and the rod part 122, and the limiting part 132 of the top rod 13 can rotate toward the bottom surface 113 of the handle body 11.

[0037] The self-locking ring 15 is located in the intermediate dividing groove 1142 on the eccentric cam 114 of the handle body 11. Please refer to... Figure 6 The self-locking ring 15 has a rotating part 151 in the middle, and the rotating part 151 has a through hole 154 corresponding to the eccentric hole 1141 on the eccentric cam 114. The self-locking ring 15 has a self-locking part 152 at one end, which is a column, and a push-back part 153 at the other end. The self-locking ring 15 is hinged to the eccentric cam 114 of the handle body 11 by a hinge pin 17 passing through the through hole 154 and the eccentric hole 1141. One end of the torsion spring 16 is attached to one end of the self-locking part 152 of the self-locking ring 15, and the other end is attached to the support part 1143 on the outside of the eccentric cam 114, for rotating the self-locking part 152 of the self-locking ring 15 towards the side closer to the first joint 20.

[0038] When the first connector 20 and the second connector 30 are locked, the first connector 20 and the second connector 30 are engaged. Rotating the handle body 11 causes the push rod 13 to rotate with the handle body 11. The tightening part 133 of the push rod 13 abuts against the ball head arc surface of the ball joint 24. This end of the push rod 13 is obstructed. Continuing to rotate the handle body 11 causes the ball head arc surface of the ball joint 24 to cause the push rod 13 to rotate relative to the pin 14, overcoming the elastic force of the return elastic element. During the rotation of the push rod 13 relative to the pin 14, because the push rod 13 is inclinedly hinged to the handle body 11, the tightening force between the push rod 13 and the ball joint 24 gradually increases. When the push rod 13 rotates a certain angle relative to the pin 14 and passes the stable point, that is, when the push rod 13 passes the dead point, the push rod 13 stably presses against the ball head rod 24, locking the first joint 20 and the second joint 30. At this time, under the action of the return spring, when the pressing rod 12's abutment part 123 moves to the limiting part 132 of the push rod 13, the arc-shaped surface 1231 on one side of the abutment part 123 fits against the limiting part 132 of the push rod 13, preventing the limiting part 132 of the push rod 13 from rotating towards the bottom surface 113 of the handle body 11. The push rod 13 is reliably locked, so that the self-locking handle has a self-locking effect. When the first connector 20 and the second connector 30 are released, the pressing rod 12 moves against the elastic force of the return spring, so that when the rod part 122 of the pressing rod 12 corresponds to the limiting part 132 of the push rod 13, since the cross-sectional dimension of the rod part 122 of the pressing rod 12 is smaller than the cross-sectional dimension of the abutment part 123, there is a gap between the limiting part 132 and the rod part 122. The limiting part 132 of the push rod 13 can rotate toward the bottom surface 113 of the handle body 11. When the handle body 11 is rotated, the push rod 13 abuts against the end of the ball head rod 24 and remains stationary. At the same time, the push rod 13 rotates relative to the pin 14, so that the compression between the push rod 13 and the ball head 24 is slowly released. When the handle body 11 is rotated again, the push rod 13 rotates with the handle body 13 and disengages from the ball head rod 24, opening the first connector 20 and the second connector 30. By moving the pressing rod 12 relative to the top rod 13, the pressing rod 12 can press against or disengage from the top rod, achieving a self-locking effect.

[0039] Under the action of the torsion spring 16, the self-locking ring 15 rotates towards the side closer to the first connector 20 and inserts into the self-locking hole provided below the boss 22, preventing the first connector 20 and the second connector 30 from rotating. It has a secondary self-locking effect. Before opening the first connector 20 and the second connector 30, press back the push part 153 to overcome the torque of the torsion spring 16, so that the self-locking part 152 disengages from the self-locking hole. Only by opening the self-locking handle 10 can the first connector 20 and the second connector 30 be released. The locking is reliable and has good safety.

[0040] In the above embodiments, the tightening part 133 of the push rod 13 is an arc-shaped inner groove, and the ball head rod 24 is an outwardly convex arc surface. In other embodiments, the tightening part 133 of the push rod 13 is also set as an outwardly convex arc surface, and correspondingly, the end face of the ball head rod 24 is set as an inwardly concave arc surface, which can still achieve the corresponding locking effect.

[0041] In other embodiments, the push rod locking member can be fixed on the first connector 20, and the distance between the push rod and the push rod locking member can be set without adjusting the push rod locking member.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A self-locking handle, comprising a handle body and a push rod, wherein one end of the handle body is provided with an eccentric cam, the eccentric cam is provided with an eccentric hole, and the push rod is rotatably hinged to the handle body, characterized in that, It also includes a return spring and a pressing rod. The pressing rod is located in the handle body, and the return spring is located between the pressing rod and the handle body. One end of the pressing rod extends out of the handle body. The push rod is inclinedly hinged to the handle body. One end of the push rod is provided with a limiting part, and the other end is provided with a tightening part. The pressing rod is provided with a pressing part, a rod part, and an abutting part. When the return spring drives the pressing rod to reset, the limiting part cooperates with the abutting part, and the abutting part of the pressing rod abuts against the limiting part at one end of the top rod, restricting the rotation of the top rod; when the pressing rod is pressed down, the pressing rod moves against the elastic force of the return spring, and the rod part of the pressing rod corresponds to the limiting part of the top rod. The limiting part and the rod part have a gap, and the pressing rod disengages from the top rod, allowing the top rod to rotate.

2. The self-locking handle as described in claim 1, characterized in that, Both the limiting part and the abutting part have an arc-shaped surface on opposite sides.

3. The self-locking handle as described in claim 2, characterized in that, The side of the abutting part facing away from the limiting part is a plane.

4. The self-locking handle as described in any one of claims 1-3, characterized in that, The tightening part of the top rod is an arc surface.

5. The self-locking handle as described in claim 4, characterized in that, The handle body has a cavity, and a mounting hole is provided on one side wall of the handle body. The pressing rod is located in the mounting hole, and the pressing part extends out of the mounting hole.

6. The self-locking handle as described in claim 5, characterized in that, The end face of the abutment part is provided with a countersunk hole, one end of the return spring is located in the countersunk hole, and the other end abuts against the handle body.

7. The self-locking handle as described in claim 5, characterized in that, It also includes a return elastic element. The push rod is provided with a recessed groove. The recessed groove is located on the side of the push rod facing the bottom surface of the handle body. One end of the return elastic element is located in the recessed groove, and the other side abuts against the bottom surface of the handle body.

8. The self-locking handle as described in any one of claims 1-3, characterized in that, It also includes a torsion spring and a self-locking ring. The eccentric cam is provided with a middle dividing groove, which divides the eccentric hole on the eccentric cam. The self-locking ring is provided in the middle dividing groove. The self-locking ring is provided with a rotating part in the middle. The rotating part is provided with a through hole corresponding to the eccentric hole on the eccentric cam. One end of the self-locking ring is provided with a self-locking part, and the other end is provided with a return part. The self-locking ring is hinged to the eccentric cam through the through hole. The torsion spring is used to rotate the self-locking part of the self-locking ring to one side.

9. A self-locking folding joint, comprising a first joint and a second joint, wherein one side of the first joint is hingedly connected to one side of the second joint, characterized in that, It also includes a self-locking handle as described in any one of claims 1-8, wherein the eccentric cam of the self-locking handle is hinged to the other side of the second connector, and the first connector is provided with a push rod locking member, wherein the push rod locking member corresponds to the push rod on the self-locking handle.

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