CN111734751A

CN111734751A - Multidirectional quick-connection coupling

Info

Publication number: CN111734751A
Application number: CN202010398457.8A
Authority: CN
Inventors: 吴燮伟; 陈春庆; 张调群; 洪凌
Original assignee: Wuxi Shensui Ship Equipment Co ltd
Current assignee: Shanghai Wuyang Electronic Technology Co.,Ltd.
Priority date: 2020-05-12
Filing date: 2020-05-12
Publication date: 2020-10-02

Abstract

The invention discloses a multidirectional quick-connection coupling, which comprises a main joint and a slave joint which are mutually connected by a cross universal joint, wherein: the secondary joint is provided with a punch head structure, and the punch head is provided with a concave inner ball groove; the joint can be accommodated in a limiting component, and the inner side of the limiting component is provided with outer ball grooves with the number equivalent to that of the inner ball grooves; the outer ball groove extends outwards from the ball holding socket positioned in the depth of the limiting component; the matching limit distance L3 between the outer ball groove edge opening and the punch is smaller than the ball cavity distance L2. Because L3 is less than the relation of L2, can be when rotating under the condition that need not help the ball cage, the ball is spacing near the middle part, gets into the operating mode. The ball can be retained in the ball socket under the non-working condition state, so that the ball socket is convenient to directly disassemble. Therefore, the invention has the advantages of convenient disconnection, adjustable coupling state under the premise of no disassembly, low requirement on processing precision under the same working condition, cost saving and convenient disassembly and repair.

Description

Multidirectional quick-connection coupling

Technical Field

The invention relates to a multidirectional quick-connection coupler, in particular to a multidirectional quick-connection coupler.

Background

A constant velocity universal joint constituting a power transmission system of an automobile or various industrial machines connects two shafts on a driving side and a driven side so as to be capable of transmitting torque, and is capable of transmitting rotational torque at a constant velocity even when the two shafts have operating angles. The constant velocity universal joint is roughly classified into a fixed type constant velocity universal joint that allows only angular displacement and a plunging type constant velocity universal joint that allows both angular displacement and axial displacement, and for example, in a drive shaft of an automobile that transmits power from an engine to drive wheels, the plunging type constant velocity universal joint is used on the differential side (inner disc side) and the fixed type constant velocity universal joint is used on the drive wheel side (outer disc side).

The universal joint comprises an outer joint member as a main component, wherein the outer joint member comprises a cup-shaped part with a track groove formed on the inner circumferential surface for clamping a torque transmission unit; and a shaft portion extending in an axial direction from a bottom of the cup portion. In this outer joint member, the cup-shaped portion and the shaft portion are often integrally formed by subjecting a solid bar-shaped material (bar material) to forging, plastic working such as ironing, cutting, heat treatment, grinding, and the like.

In the conventional art, as disclosed in chinese patent publication No. CN108602111B, there is disclosed a method of forging an outer joint member of a constant velocity universal joint in which each of track grooves of an outer joint member and an inner joint member has an arc-shaped ball raceway center line (X, Y) having a curvature center not shifted in an axial direction with respect to a joint center (O), a plane including the ball raceway center line and the joint center (O) is inclined in a circumferential direction with respect to an axis of the joint, and the inclination direction is opposite to that of the track grooves of the inner joint member in a pair of the track grooves of the outer joint member. The forming die can eliminate the gap between the punches of the adjacent pair of rolling groove forming surfaces and integrally form the pair of rolling groove forming surfaces on one punch, so that high-precision forming can be realized by improving the structural strength and rigidity, and the region with thin wall at the shoulder part of the punch is eliminated, so that the concentration of stress is relieved, and the service life of the die can be improved.

Disclosure of Invention

The invention aims to provide a multidirectional quick-connection coupler which is convenient to disconnect, adjustable in coupling state under the condition of no disassembly, low in machining precision requirement under the same working condition, cost-saving, and convenient to disassemble and repair.

The technical scheme adopted by the invention for solving the technical problems is as follows: multidirectional quick-connect coupling includes with master joint and the slave joint of cross universal joint interconnect, wherein: the secondary joint is provided with a punch head structure, and the punch head is provided with a concave inner ball groove; the joint can be accommodated in a limiting component, and the inner side of the limiting component is provided with outer ball grooves with the number equivalent to that of the inner ball grooves; the outer ball groove extends outwards from the ball holding socket positioned in the depth of the limiting component; the matching limit distance L3 between the outer ball groove edge opening and the punch is smaller than the ball cavity distance L2. Because L3 is less than the relation of L2, can be when rotating under the condition that need not help the ball cage, the ball is spacing near the middle part, gets into the operating mode. The ball can be retained in the ball socket under the non-working condition state, so that the ball socket is convenient to directly disassemble.

In order to optimize the technical scheme, the adopted measures further comprise: the inner ball groove and the outer ball groove both extend axially from the joint. The existence of the spacing interval of cooperation of outer ball groove bead and drift makes, just can work under interior ball groove and outer ball groove all along the condition from connecting axial extension, greatly reduced manufacturing accuracy and the processing degree of difficulty. The inner or outer ball grooves extend axially from the joint in a spiral opposite to the direction of rotation. If under the working condition, the axial large dragging force exists, the reverse spiral can be made in an alternative mode. The normal working condition can still be achieved under the conditions of no need of a ball cage and low processing cost. The outer ball groove limiting surface of the standing ball socket extends to a position close to the inner ball groove and is provided with a generally cylindrical side surface. The outer spherical groove limiting surface of the approximately cylindrical side surface can reduce the process requirement, but does not influence the clamping effect, and further reduces the cost. The outer ball groove limiting surface of the standing ball socket extends to a position close to the inner ball groove and is provided with an outer ball groove limiting surface which is a roughly circular cylindrical surface. The outer ball groove limiting surface of the approximately circular cylindrical surface enables the balls to move to the top end of the arc of the outer ball groove limiting surface under the working condition clamping state, namely L2 is larger than L1, so that the stress balance of all the balls is better, the clamping force is similar to a stress surface perpendicular to the axial direction of the slave joint, and the reliability is improved. While the machining is somewhat more complicated but still more cost effective than the prior art. The ratio L1: D of the diameter D of the ball close to the distance L1 between the limiting surface of the outer ball groove and the inner edge of the punch is 1.05-1.2. When L1: D is in the range, the ball slides out of the ball-holding socket more smoothly, and better working condition response can be obtained. And if D is too small, stress concentration can be caused, and the torque bearing capacity of the whole coupling is reduced. And a position regulating structure capable of regulating the ball to enter or leave the ball-holding socket is arranged near the joint in the axial direction. The position regulating structure is a magnetic induction device and/or a magnetic withdrawal device which are arranged axially from the joint. The components are electromagnets, and the balls are controlled in an electromagnetic mode. The position regulating structure is a first air inlet channel communicated with the ball-holding socket and/or a second air inlet channel near the base of the punch. When the situation that the material of the ball cannot be controlled by magnetic force occurs, the position of the ball is regulated and controlled in an actuating mode. An air pump is also provided in communication with the first and/or second air intake passages. The air pump is generally independently arranged and is only used for adjusting the position of the ball and disassembling the coupler.

Because the auxiliary joint is provided with the punch head structure, the punch head is provided with the sunken inner ball groove; the joint can be accommodated in a limiting component, and the inner side of the limiting component is provided with outer ball grooves with the number equivalent to that of the inner ball grooves; the outer ball groove extends outwards from the ball holding socket positioned in the depth of the limiting component; the matching limit distance L3 between the outer ball groove edge opening and the punch is smaller than the ball cavity distance L2. Because L3 is less than the relation of L2, can be when rotating under the condition that need not help the ball cage, the ball is spacing near the middle part, gets into the operating mode. The ball can be retained in the ball socket under the non-working condition state, so that the ball socket is convenient to directly disassemble. Therefore, the invention has the advantages of convenient disconnection, adjustable coupling state under the premise of no disassembly, low requirement on processing precision under the same working condition, cost saving and convenient disassembly and repair.

Drawings

FIG. 1 is a schematic perspective view of an embodiment of the present invention;

FIG. 2 is a schematic top view of an embodiment of the present invention;

FIG. 3 is a schematic cross-sectional view (circular arc groove) of an embodiment of the present invention;

FIG. 4 is a schematic cross-sectional view (straight slot) of an embodiment of the present invention;

FIG. 5 is a schematic diagram of a partially enlarged structure of an embodiment of the present invention (comparing a straight groove with a circular arc groove);

FIG. 6 is a schematic diagram of a differential state structure according to an embodiment of the present invention;

FIG. 7 is a schematic view of a common inner ball groove according to an embodiment of the present invention;

FIG. 8 is a schematic view of a spiral inner ball groove structure according to an embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the following examples.

The reference numbers illustrate: the device comprises a main joint 1, a main interface 11, a main connecting arm 12, a slave joint 2, a magnetic induction device 2a, a slave connecting arm 21, a punch 22, an inner ball groove 22a, a limiting member 3, a magnetic withdrawal device 3a, a slave interface 31, an outer ball groove 32, a ball holding socket 32a, an outer ball groove limiting surface 32b, a universal joint cross 4 and a ball 5.

Example (b): refer to fig. 1 to 8. The present embodiment shows in a preferred, alternative form, a multidirectional quick coupling of the invention, comprising a master joint 1 and a slave joint 2 interconnected by a universal joint cross 4, wherein: the slave joint 2 is provided with a punch 22 structure, and the punch 22 is provided with a concave inner ball groove 22 a; the joint 2 can be accommodated in a stop member 3, and the inside of the stop member 3 is provided with outer ball grooves 32 the number of which is equivalent to that of the inner ball grooves 22 a; the outer ball groove 32 extends outward from the ball holding socket 32a located in the depth of the stop member 3; the outer ball groove 32 lip to punch 22 engagement limit spacing L3 is less than the ball pocket spacing L2. Because L3 is less than the relation of L2, when rotating, the ball 5 can be limited near the middle part and enter the working condition under the condition of not using a ball cage. In the non-working condition state, the ball 5 can be stayed in the ball staying socket 32a, so that the direct disassembly is convenient. The inner ball groove 22a and the outer ball groove 32 extend in the axial direction from the joint 2. The existence of the matching limit distance between the edge of the outer ball groove 32 and the punch 22 enables the inner ball groove 22a and the outer ball groove 32 to work under the condition of extending axially from the joint 2, thereby greatly reducing the manufacturing precision and the processing difficulty. The inner ball groove 22a or the outer ball groove 32 extends axially from the joint 2 in a spiral opposite to the direction of rotation. If under the working condition, the axial large dragging force exists, the reverse spiral can be made in an alternative mode. The normal working condition can still be achieved under the conditions of no need of a ball cage and low processing cost. The outer socket limiting surface 32b of the ball retention socket 32a extends to have a generally cylindrical lateral outer socket limiting surface 32b adjacent the location of the inner socket 22 a. The external spherical groove limiting surface 32b with the approximately cylindrical side surface can reduce the process requirement, but does not influence the clamping effect, and further reduces the cost. The outer ball groove limiting surface 32b of the ball-seating socket 32a extends to a position near the inner ball groove 22a and has an outer ball groove limiting surface 32b with a substantially circular cylindrical surface. The outer ball groove limiting surface 32b of the approximately circular cylindrical surface enables the ball 5 to move to the top end of the arc of the outer ball groove limiting surface 32b under the working condition clamping state, namely L2 is larger than L1, so that the stress balance of all the ball 5 is better, the clamping force is similar to a stress surface vertical to the axial direction of the slave joint 2, and the reliability is improved. While the machining is somewhat more complicated but still more cost effective than the prior art. The ratio L1: D of the diameter D of the ball at the position of the outer ball groove limiting surface 32b close to the inner edge opening of the punch 22 and the distance L1 is 1.05-1.2. When L1: D is in the above range, the ball 5 slides out of the ball-holding socket 32a more smoothly, and better working condition response can be obtained. And if D is too small, stress concentration can be caused, and the torque bearing capacity of the whole coupling is reduced. A position regulating structure capable of regulating the ball 5 to enter or leave the ball-holding socket 32a is provided from the vicinity of the joint 2 in the axial direction. The position regulating structure is a magnetic induction device 2a and/or a magnetic withdrawal device 3a arranged axially from the joint 2. The components are electromagnets, and the ball 5 is controlled in an electromagnetic mode. The position regulating structure is a first air intake passage communicating with the ball-holding socket 32a and/or a second air intake passage near the base of the punch 22. When the situation occurs that the material of the ball 5 cannot be controlled by magnetic force, the position of the ball 5 is regulated in an activated manner. An air pump is also provided in communication with the first and/or second air intake passages. The air pump is generally independently arranged and is only used for adjusting the position of the ball 5 and disassembling the coupler.

In the initial state, the ball 5 is located in the ball-holding socket (32 a). The magnetic unseating device 3a can hold the initial position of the ball 5 as desired. At this time, the coupling may be idly rotated. When the ball 5 is guided into the inner ball groove (22a) by the magnetic induction device 2a, the work starts, the working condition is entered, and after the differential motion between the joint 2 and the limiting member 3, the clamping force between the inner ball groove (22a) and the outer ball groove 32 acts on the ball 5.

The principle of the exit condition is that the position of the ball 5 is directly adjusted back into the parking socket (32a) in a counter-rotating or magnetic or pneumatic manner, according to different embodiments. According to the technical scheme, the specific inner ball groove (22a), the specific outer ball groove (32) and the peripheral matching structure and device are combined, so that the requirement on the machining precision of parts is greatly reduced, and a whole set of some technical schemes can be finished by a worker. The machining scheme does not need to use a forming machine with higher cost, the machined curved surface only needs to be symmetrical, and the requirement on surface treatment is not high. In the prior art, a large number of nonlinear processing paths are adopted, and common processing machinery is difficult to finish at one time. Details of the connecting rack, threads, etc., have been omitted from the drawings for clarity of drawing, as will be understood by those of ordinary skill in the art.

While the invention has been described in connection with a preferred embodiment, it is not intended to limit the invention, and it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the invention.

Claims

1. Multidirectional quick-connect coupling is including main joint (1) and follow joint (2) with cross universal joint (4) interconnect, characterized by: the slave joint (2) is provided with a punch head (22) structure, and the punch head (22) is provided with a concave inner ball groove (22 a); the joint (2) can be accommodated in a limiting component (3), and the inner side of the limiting component (3) is provided with outer ball grooves (32) with the number equivalent to that of the inner ball grooves (22 a); the outer ball groove (32) extends outwards from a ball holding socket (32a) which is positioned at the depth of the limiting component (3); the matching limit distance L3 between the edge of the outer ball groove (32) and the punch head (22) is smaller than the ball cavity distance L2.

2. The multidirectional quick connect coupling of claim 1, wherein: the inner ball groove (22a) and the outer ball groove (32) extend along the axial direction of the joint (2).

3. The multidirectional quick connect coupling of claim 1, wherein: the inner ball groove (22a) or the outer ball groove (32) extends along the axial direction from the joint (2) and is spiral opposite to the rotation direction.

4. The multidirectional quick connect coupling of claim 1, wherein: the outer ball groove limiting surface (32b) of the ball-holding socket (32a) extends to the position close to the inner ball groove (22a) and is provided with an outer ball groove limiting surface (32b) with a generally cylindrical side surface.

5. The multidirectional quick connect coupling of claim 1, wherein: the outer ball groove limiting surface (32b) of the ball-holding socket (32a) extends to the position close to the inner ball groove (22a) and is provided with an outer ball groove limiting surface (32b) which is a roughly circular cylindrical surface.

6. The multidirectional quick connect coupling of claim 1, wherein: the ratio L1: D of the ball diameter D of the outer ball groove limiting surface (32b) close to the inner edge opening distance L1 of the punch (22) is 1.05-1.2.

7. The multidirectional quick connect coupling of claim 1, wherein: and a position regulating structure capable of regulating the ball (5) to enter or leave the ball-holding socket (32a) is arranged near the joint (2) in the axial direction.

8. The multidirectional quick connect coupling of claim 7, wherein: the position regulating structure is a magnetic induction device (2a) and/or a magnetic withdrawal device (3a) which are/is arranged on the axial direction of the slave joint (2).

9. The multidirectional quick connect coupling of claim 7, wherein: the position regulating structure is a first air inlet channel communicated with the ball-holding socket (32a) and/or a second air inlet channel near the base of the punch (22).

10. The multidirectional quick connect coupling of claim 9, wherein: and the air pump is communicated with the first air inlet channel and/or the second air inlet channel.