Folding joint

Abstract

The utility model discloses a folding joint which comprises a first connector, a second connector, a handle and an adjusting ejector rod, a self-locking mechanism is arranged on the handle and comprises a clamping block, a compression spring and an adjusting push rod, the clamping block is provided with a clamping groove and a guide inclined face, the clamping groove is used for containing the adjusting ejector rod, and the guide inclined face is arranged at the top of the clamping groove. The clamping block is further provided with a connecting part, a threaded hole is formed in the connecting part, a screwing part is arranged on the surface of the adjusting push rod, the adjusting push rod is in threaded connection with the connecting part, a button is arranged at one end of the adjusting push rod, an optical shaft is arranged at the other end of the adjusting push rod, and a step face is arranged at the joint of the screwing part and the optical shaft. One end of the compression spring abuts against the step face, and the other end of the compression spring abuts against the inner side of the handle. According to the folding joint disclosed by the utility model, the unlocking force can be adjusted by adjusting the compression amount of the compression spring, and the folding joint also has an anti-loosening effect.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of locking mechanism of mechanical connection, and concretely relates to a folding joint. BACKGROUND

[0002] The folding connecting part of the existing foldable equipment such as folding bicycle, folding electric bicycle and the like uses the folding joint of quick release structure, which is used for folding, disassembling and even locking the folding connecting part quickly. In order to facilitate folding and disassembling, the locking structure of the existing folding joint cannot be designed too tightly, and thus an additional locking mechanism needs to be arranged on the frame to fix the operating handle.

[0003] For example, the button self-locking four-bar linkage vehicle body folding joint disclosed in Chinese patent 202120062690.9 has a clamping groove accommodating the connecting rod on the button structure, and the outer side of the top of the clamping groove has a guide slope; one side of the clamping groove is an operating button, and the other side is provided with a spring sleeve shaft, and the spring sleeve shaft is provided with a spring; when the operating button is driven or when the guide slope is subjected to the force of the connecting rod, the button structure moves and compresses the spring; when the external force acting on the spring disappears, the button structure resets under the driving of the spring force. The device has a self-locking mechanism formed by the spring force, which may cause the folding joint to be opened by inadvertent pressing of the button and rotation of the handle, and has a safety hazard. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a folding joint, which can adjust the unlocking force by adjusting the compression amount of the spring and has the effect of preventing loosening.

[0005] The technical scheme adopted by the folding joint disclosed by the utility model is:

[0006] The utility model provides a folding joint, including first connecting head, second connecting head, handle and adjusting jacking rod, one side of first connecting head and second connecting head is hinged, one end of handle is hinged to the other side of first connecting head, the other end of handle is equipped with positioning pin, the other side of second connecting head is equipped with jacking shaft, one end of adjusting jacking rod is fixedly connected with positioning pin, the other end of adjusting jacking rod is fixedly connected with jacking shaft, be equipped with self -locking mechanism on handle, self -locking mechanism includes clamping block, compression spring and adjusting push rod, clamping block is equipped with clamping groove and guide inclined plane, clamping groove is used to accommodate adjusting jacking rod, and guide inclined plane is equipped in the top of clamping groove, clamping block is equipped with connecting portion still, be equipped with threaded hole on connecting portion, the surface of adjusting push rod is equipped with screwing portion, adjusting push rod is connected in threaded hole on connecting portion, one end of adjusting push rod is equipped with button, and the other end is equipped with light shaft, adjusting push rod is equipped with step surface at the junction of screwing portion and light shaft, compression spring is sleeved on the outer surface of light shaft, one end of compression spring is in abutment with step surface, and the other end is in abutment with the inside of handle.

[0007] As a preferred scheme, the clamping block is further provided with a spring groove in communication with the threaded hole on the connecting portion, the compression spring is arranged in the spring groove, one end of the clamping block is provided with a through hole matched with the light shaft, and one end of the light shaft is slidably arranged in the through hole through the spring groove.

[0008] As a preferred scheme, the step surface is circular in cross-sectional shape, the outer diameter of the step surface is larger than the outer diameter of the light shaft, and the outer diameter of the step surface is consistent with the outer diameter of the screwing portion on the surface of the adjusting push rod.

[0009] As a preferred scheme, a limiting portion is arranged between the screwing portion and the button of the adjusting push rod, the limiting portion is circular in cross-sectional shape, and the outer diameter of the limiting portion is larger than the outer diameter of the screwing portion on the surface of the adjusting push rod.

[0010] As a preferred scheme, the handle is provided with a first side plate and a second side plate, the first side plate is provided with a sliding hole matched with the limiting portion, and the limiting portion of the adjusting push rod is arranged in the sliding hole.

[0011] As a preferred scheme, the second side plate is provided with a first circular hole and a second circular hole, the first circular hole is matched with one end of the clamping block, the second circular hole is matched with one end of the light shaft, and the first circular hole and the second circular hole are in communication.

[0012] As a preferred scheme, the middle parts of the positioning pin and the jacking shaft are respectively provided with threaded holes, and the ends of the adjusting jacking rod are respectively screwed with the threaded holes of the positioning pin and the jacking shaft.

[0013] As a preferred scheme, the folding joint further comprises a rotating shaft and a hinged shaft, and the first connecting head bottom is provided with a limiting pin, the limiting pin passes through the second connecting head and abuts against one end of the hinged shaft.

[0014] As a preferred scheme, the optical axis is provided with a mounting groove, a blocking ring is clamped and connected on the mounting groove, and one side of the blocking ring abuts against the outer side of the handle.

[0015] As a preferred scheme, the outer surface of the button is in the shape of a gear, or the button is provided with a slotted hole in the shape of an internal hexagon.

[0016] The folding joint has the advantages that: in the working state, the handle is rotated to drive the adjusting top rod to rotate, the adjusting top rod touches the guide inclined surface on the top of the clamping groove of the clamping block, the rotating angle of the handle is increased, the pushing force of the adjusting top rod on the clamping block is gradually increased, the clamping block drives the adjusting push rod to overcome the elastic force of the compression spring through the stepped surface on the adjusting push rod, and the compression spring is compressed, so that the adjusting top rod can smoothly slide into the clamping groove along the guide inclined surface on the top of the clamping groove.

[0017] When the folding joint needs to be opened, the button is pressed, the stepped surface of the adjusting push rod overcomes the elastic force of the compression spring, the compression spring is compressed, the clamping groove of the clamping block is driven to move, the top of the clamping groove releases the adjusting push rod, the handle is rotated, and the adjusting top rod is separated from the clamping groove, so that the folding joint is opened, and the operation is convenient.

[0018] In addition, the folding joint has the function of adjusting the unlocking force, the adjusting push rod is rotated, the stepped surface on the surface of the adjusting push rod overcomes the elastic force of the compression spring, the compression spring is compressed, the compression amount of the compression spring is changed, the pressing force of the button of the adjusting push rod is adjusted, the needs and operation habits of users are met, and the operation feeling of different users is adapted. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is the three-dimensional schematic view of the folding joint of the utility model.

[0020] Figure 2 is the structural schematic view of another perspective of the folding joint of the utility model.

[0021] Figure 3 is the exploded schematic view of the folding joint of the utility model.

[0022] Figure 4 is the structural schematic view of the partial explosion of the folding joint of the utility model.

[0023] Figure 5 is the exploded schematic view of the self-locking mechanism in the folding joint of the utility model.

[0024] Figure 6 is the exploded schematic view of another perspective of the self-locking mechanism in the folding joint of the utility model.

[0025] Figure 7 is the structural schematic view of the handle in the folding joint of the utility model. DETAILED DESCRIPTION

[0026] The utility model will be further described and explained in combination with specific embodiments and the drawings of the specification:

[0027] Reference Figures 1 to 7 A folding joint, comprising a first connecting head 10, a second connecting head 20, a handle 30 and an adjusting jacking rod 40, one side of the first connecting head 10 and the second connecting head 20 are hinged, one end of the handle 30 is hinged to the other side of the first connecting head 10, the other end of the handle 30 is equipped with a positioning pin 60, the other end of the second connecting head 20 is equipped with a jacking shaft 70, one end of the adjusting jacking rod 40 is screwed with the positioning pin 60, the other end of the adjusting jacking rod 40 is screwed with the jacking shaft 70, the handle 30 is equipped with a self-locking mechanism 50, the self-locking mechanism 50 comprises a clamping block 51, a compression spring 52 and an adjusting push rod 53, the clamping block 51 is equipped with a clamping groove 511 and a guide inclined surface 512, the clamping groove 511 is used for accommodating the adjusting jacking rod 40, the guide inclined surface 512 is arranged at the top of the clamping groove 511, the clamping block 51 is also equipped with a connecting part 513, the connecting part 513 is equipped with a threaded hole 5131, the surface of the adjusting push rod 53 is equipped with a screwing part 531, the adjusting push rod 53 is screwed with the connecting part 513, one end of the adjusting push rod 53 is equipped with a button 532, the other end is equipped with a light shaft 533, the adjusting push rod 53 is equipped with a step surface 534 at the intersection of the outer screwing part and the light shaft, the compression spring 52 is sleeved on the outer surface of the light shaft 533, one end of the compression spring 52 abuts against the step surface 534, and the other end abuts against the inner side of the handle 30.

[0028] The connection between the button 532 and the adjusting push rod 53 can be integrated or detachable, etc.

[0029] The clamping block 51 is also provided with a spring groove 514, which is in communication with the threaded hole 5131 on the connecting part 513. The compression spring 52 is arranged in the spring groove 514 and can be compressed and released in the spring groove 514, so as to realize the adjustment of the spring force. The compression spring 52 will not rotate out of position in the spring groove 514, so that the self-locking mechanism 50 can operate normally. One end of the clamping block 51 is provided with a through hole 515 matched with the optical shaft 533. One end of the optical shaft 533 is arranged in the through hole 515 in a sliding manner through the spring groove 514, so that the adjusting push rod 53 can move in the clamping block 51 while maintaining the connection with the compression spring 52, thereby realizing the extrusion and release of the compression spring 52 by the stepped surface 534 on the adjusting push rod 53.

[0030] The cross-sectional shape of the stepped surface 534 is circular. The outer diameter of the stepped surface 534 is greater than the outer diameter of the optical shaft 533, and the outer diameter of the stepped surface 534 is consistent with the outer diameter of the screwing part 531 on the surface of the adjusting push rod 53. When the adjusting push rod 53 is rotated, the screwing part 531 can move relatively through the threaded connection with the threaded hole 513 on the connecting part 513 of the clamping block 51. The adjusting push rod 53 extrudes the compression spring 52 by using the stepped surface 534, so as to control the elastic force of the compression spring 52.

[0031] The top of the clamping groove 511 is partially sealed. When the adjusting top rod 40 needs to be clamped in the clamping groove 511, the adjusting top rod 40 can provide a guiding effect when moving on the surface of the guiding slope 512. The surface of the guiding slope 512 is smooth, which can ensure that the adjusting top rod 40 is smoothly slid into the clamping groove 511 for locking. The smooth slope can reduce the friction with the adjusting top rod 40, effectively reduce the scratching on the folding joint, and also help the adjusting top rod 40 to slide in, effectively increase the smoothness of the structure.

[0032] The screwing part 531 of the adjusting push rod 53 and the button 532 are provided with a limiting part 535. The cross-sectional shape of the limiting part 535 is circular. The outer diameter of the limiting part 535 is greater than the outer diameter of the screwing part 531 on the surface of the adjusting push rod 53. When the adjusting push rod 53 is rotated to adjust the unlocking force, the circular surface at one end of the limiting part 535 can abut one end of the connecting block, which can prevent the adjusting push rod 53 from being excessively rotated during operation, so as to ensure that the adjusting push rod 53 always remains within a reasonable range during rotation, effectively avoiding damage to the thread or adjustment failure due to excessive rotation.

[0033] The handle 30 is provided with a first side plate 31 and a second side plate 32, the first side plate 31 is provided with a sliding hole 311 matched with the limiting part 535, the adjusting push rod 53 is slidably arranged in the sliding hole 311 through the limiting part 535, when the button 532 is pressed or rotated, the button 532 drives the adjusting push rod 53 to move in the sliding hole 311, so as to realize the unlocking of the self-locking mechanism 50 and the pressure adjustment of the compression spring 52; the second side plate 32 is provided with a first circular hole 321 and a second circular hole 322, the first circular hole 321 is matched with one end of the clamping block 51, and the second circular hole 322 is matched with one end of the light shaft 533, when the button 532 is pushed, the circular surface of one end of the clamping block 51 and the light shaft 533 respectively slide transversely in the first circular hole 321 and the second circular hole 322, the first circular hole 321 is in communication with the second circular hole 322, which can reduce the friction and wear between the sliding, prolong the service life of the parts.

[0034] The middle part of the positioning pin 60 and the top shaft 70 is respectively provided with a threaded hole, and the two ends of the adjusting top rod 40 are respectively screwed with the threaded holes of the positioning pin 60 and the top shaft 70, wherein the two ends of the adjusting top rod 40 are right and left threads, and the two ends of the adjusting top rod 40 can realize bidirectional adjustment of the positioning pin 60 and the top shaft 70, and the user can select to rotate any end of the adjusting top rod 40 to adjust the position of the positioning pin 60 or the top shaft 70 according to the need, realize accurate adjustment and fixation, and improve the adjustment ability and operation convenience of the folding joint.

[0035] The folding joint further comprises a rotating shaft 80 and a hinge shaft 90, the first connecting head 10 and the second connecting head 20 are hingedly connected through the rotating shaft 80, and the handle 30 and the second connecting head 20 are hingedly connected through the hinge shaft 90, the first connecting head 10 and the second connecting head 20 can be used to connect the front and rear parts of various bicycles or electric bicycles, and can be flexibly folded into an entire vehicle body, which is simple in structure and easy to use.

[0036] The folding joint can also be used on various folding mechanical parts, which is high in flexibility and convenient to install.

[0037] The first connecting head 10 is provided with a limiting pin 11, the limiting pin 11 abuts against one end of the hinge shaft 90 through the second connecting head 20, so as to prevent the first connecting head 10 and the second connecting head 20 from being displaced when rotating, and improve the stability.

[0038] The light axis 533 is provided with a mounting groove 535, the mounting groove 535 is connected with a blocking ring 54 in clamping mode, one side of the blocking ring 54 abuts with the outer side of the handle 30, the maximum stroke of the adjusting push rod 53 in the handle 30 is limited, the over-retraction of the adjusting push rod 53 can be prevented, so that the normal working range of the self-locking mechanism 50 is protected, and the service life of components is prolonged.

[0039] The outer surface of the button 532 is gear-shaped, the gear-shaped outer surface increases the friction between the button 532 and the fingers of the user, so that the user can more easily exert force when rotating the button 532, and the operation failure caused by hand slip can be prevented; a slotted hole or a cross-shaped slotted hole in the form of an inner hexagon can be arranged on the surface of the button 532, the shape of the slotted hole can be various, the button 532 can be replaced according to the hole position shape required by the customer, and a slotted hole is arranged at the end of the button 532, so that the user can conveniently use a corresponding tool to twist, time and labor are saved, and torque can be conveniently exerted when the button 532 is twisted to adjust the pressure of the compression spring 52, so that the operation is simple and convenient, the application range is wide, and the safety is high.

[0040] The folding joint disclosed by the utility model is in a working state, the handle 30 drives the adjusting jack 40 to rotate, the adjusting jack 40 touches the guide inclined surface 512 on the top of the clamping groove 511 of the clamping block 51, along with the increase of the rotating angle of the handle 30, the pushing force of the adjusting jack 40 on the clamping block 51 also gradually increases, the clamping block 51 drives the adjusting push rod 53 to overcome the elastic force of the compression spring 52 through the stepped surface 534 on the adjusting push rod 53, and the compression spring 52 is pushed to compress, so that the adjusting jack 40 can smoothly slide to the clamping groove 511 along the guide inclined surface 512 on the top of the clamping groove 511. When the adjusting jack 40 completely enters the clamping groove 511, the clamping block 51 is reset under the driving of the elastic force of the compression spring 52, and then the adjusting jack 40 is clamped in the clamping groove 511 by the clamping groove 511 of the clamping block 51. At this time, even if the handle 30 is rotated, the adjusting jack 40 cannot be separated from the clamping groove 511, so that the self-locking function of the folding joint is realized.

[0041] When the folding joint needs to be opened, the button 532 is pressed, the stepped surface 534 of the adjusting push rod 53 overcomes the elastic force of the compression spring 52, and the compression spring 52 is pushed to compress, the clamping groove 511 of the clamping block 51 is driven to move, after the top of the clamping groove 511 releases the adjusting push rod 53, the handle 30 is rotated, the adjusting jack 40 is separated from the clamping groove 511, so that the folding joint is opened, and the operation is convenient.

[0042] In addition, the folding joint disclosed by the utility model also has the function of adjusting the unlocking force, rotating the adjusting push rod 53, making the step surface 534 of the adjusting push rod 53 overcome the elastic force of the compression spring 52, and pushing the compression spring 52 to compress, adjusting the pressing force of the button 532 of the adjusting push rod 53 by changing the compression amount of the compression spring 52, so as to meet the needs and operation habits of users and adapt to the operation feeling of different users. When the rotating adjusting push rod 53 makes the compression spring 52 extrude to a larger compression state, the button 532 is pressed, the clamping block 51 is pushed by the button 532, and the top of the clamping groove 511 of the clamping block 51 is still clamped to the adjusting top rod 40. At this time, even if the handle 30 is rotated, the adjusting top rod 40 cannot be released from the clamping groove 511, and the effect of preventing loosening is achieved. When the folding joint needs to be opened, the adjusting push rod 53 is rotated, the adjusting push rod 53 moves and releases the compression force of the compression spring 52, at this time, the button 532 is pressed, the button 532 pushes the clamping block 51 by overcoming the elastic force of the compression spring 52 through the adjusting push rod 53, so that the adjusting top rod 40 is separated from the top of the clamping groove 511, thereby realizing the unlocking function, and the safety is good.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, and are not limited to the protection scope of the utility model. Although the utility model has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the utility model can be modified or replaced equivalently without departing from the essence and scope of the technical solutions of the utility model.

Claims

1. A folding joint comprising a first connecting head, a second connecting head, a handle and an adjusting jack, one side of the first connecting head and the second connecting head being hingedly connected, one end of the handle being hingedly connected to the other side of the first connecting head, the other end of the handle being provided with a positioning pin, the other side of the second connecting head being provided with a jacking shaft, one end of the adjusting jack being fixedly connected with the positioning pin, the other end of the adjusting jack being fixedly connected with the jacking shaft, characterized in that, The handle is provided with a self-locking mechanism, the self-locking mechanism comprises a clamping block, a compression spring and an adjusting push rod, the clamping block is provided with a clamping groove and a guide inclined surface, the clamping groove is used for accommodating the adjusting top rod, the guide inclined surface is arranged at the top of the clamping groove, the clamping block is further provided with a connecting portion, the connecting portion is provided with a threaded hole, the surface of the adjusting push rod is provided with a threaded portion, the adjusting push rod is threadedly connected to the connecting portion, one end of the adjusting push rod is provided with a button, the other end is provided with a light shaft, the adjusting push rod is provided with a stepped surface at the intersection of the threaded portion and the light shaft, the compression spring is sleeved on the outer surface of the light shaft, one end of the compression spring abuts against the stepped surface, and the other end abuts against the inner side of the handle.

2. The foldover joint of claim 1 wherein, The clamping block is further provided with a spring groove in communication with the threaded hole in the connecting portion, and the compression spring is arranged in the spring groove.

3. The foldover joint of claim 1 wherein, The stepped surface is circular in cross-sectional shape, the outer diameter of the stepped surface is greater than the outer diameter of the light shaft, and the outer diameter of the stepped surface is consistent with the outer diameter of the threaded portion on the surface of the adjusting push rod.

4. The foldover joint of claim 1 wherein, A limiting portion is arranged between the threaded portion and the button of the adjusting push rod, the limiting portion is circular in cross-sectional shape, and the outer diameter of the limiting portion is greater than the outer diameter of the threaded portion on the surface of the adjusting push rod.

5. The foldover joint of claim 4 wherein, The handle is provided with a first side plate and a second side plate, the first side plate is provided with a sliding hole matched with the limiting portion, and the limiting portion of the adjusting push rod is arranged in the sliding hole.

6. The foldover joint of claim 5 wherein, The second side plate is provided with a first circular hole and a second circular hole, the first circular hole is matched with one end of the clamping block, the second circular hole is matched with one end of the light shaft, and the first circular hole is in communication with the second circular hole.

7. The foldover joint of claim 1 wherein, The middle part of the positioning pin and the jacking shaft is respectively provided with a threaded hole, and the two ends of the adjusting top rod are respectively screwed with the threaded holes of the positioning pin and the jacking shaft.

8. The foldover joint of claim 1 wherein, The folding joint further comprises a rotating shaft and a hinge shaft, the first connecting head is provided with a limiting pin, the limiting pin passes through the second connecting head and abuts against one end of the hinge shaft.

9. The foldover joint of claim 1 wherein, The light shaft is provided with a mounting groove, the mounting groove is clamped and connected with a retaining ring, and one side of the retaining ring abuts against the outer side of the handle.

10. The foldover joint of claim 1 wherein, The outer surface of the button is gear-shaped, or the button is provided with a slotted hole with an internal hexagonal shape. The outer surface of the button is gear-shaped, or the button is provided with a slotted hole with an internal hexagonal shape.

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