阅读说明：本技术 一种联轴器 (Shaft coupling ) 是由 王灵锋 潘成剑 黄叶青 张帆 郭帅帅 邵文清 秦小华 薛丽 于 2020-11-26 设计创作，主要内容包括：本发明提供一种联轴器,包括联轴器母件和联轴器公件；所述联轴器母件由传动盘一、滚轮和滚轮放置槽组成,所述的滚轮放置槽位于传动盘一上,所述的滚轮每组有两个安装在滚轮放置槽中,两个滚轮之间留有与所述联轴器公件配合的空隙；所述联轴器公件为拨叉结构,其拨叉的位置与个数和所述的两个滚轮之间的空隙的位置与个数相配合,拨叉穿过所述联轴器母件上同滚轮放置槽内的两个滚轮之间的空隙与所述的联轴器母件相连。本发明既可应用于两侧连接轴无轴向相对运动的场景,也可应用于连接轴有轴向运动的场景,传动过程中摩擦损失更小、发热量少,磨损少,效率更高。(The invention provides a coupler, which comprises a coupler female part and a coupler male part; the coupler female part comprises a first transmission disc, rollers and roller placement grooves, the roller placement grooves are located on the first transmission disc, two rollers are arranged in each roller placement groove, and a gap matched with the coupler male part is reserved between the two rollers; the coupler male part is of a shifting fork structure, the position and the number of shifting forks of the coupler male part are matched with the position and the number of gaps between the two rollers, and the shifting forks penetrate through the coupler female part and the gaps between the two rollers in the roller placement grooves and are connected with the coupler female part. The invention can be applied to the scene that the connecting shafts on the two sides do not have axial relative motion and can also be applied to the scene that the connecting shafts have axial motion, and the invention has the advantages of less friction loss, less heat productivity, less abrasion and higher efficiency in the transmission process.)

1. A coupler is characterized by comprising a coupler female part and a coupler male part; the coupler female part comprises a first transmission disc, rollers and roller placement grooves, the roller placement grooves are located on the first transmission disc, two rollers are arranged in each roller placement groove, and a gap matched with the coupler male part is reserved between the two rollers; the coupler male part is of a shifting fork structure, the position and the number of shifting forks of the coupler male part are matched with the position and the number of gaps between the two rollers, and the shifting forks penetrate through the coupler female part and the gaps between the two rollers in the roller placement grooves and are connected with the coupler female part.

2. The coupling according to claim 1, wherein the roller receiving slot is symmetrically provided with roller shaft mounting through holes for mounting a roller shaft, and the roller shaft is used for fixing the roller on the first transmission disc.

3. The coupling according to claim 2, wherein the roller shaft is of a constant diameter optical axis structure, and is used for supporting the rollers on the same side in different roller accommodating grooves and in interference fit with the roller shaft mounting through hole of the transmission disc.

4. The coupler according to claim 1, wherein a first flat boss is arranged at the center of the first transmission disc, and a first transmission flat opening is formed in the middle of the first flat boss; locking threaded holes are formed in two sides of the flat boss.

5. A coupling according to claim 1 or 3, wherein said rollers are in close clearance fit with said roller receiving grooves.

6. The coupler of claim 5, wherein the roller housing is of a waist-drum-like configuration, and the middle of the outer circular surface of the roller housing is higher than the two sides of the roller housing, thereby effectively reducing the occurrence of the outer side eccentric wear of the roller.

7. The coupler of claim 6, wherein the male coupler further comprises a second transmission disc and a second flat boss, the second flat boss is provided with a second transmission flat opening in the middle, and the second flat boss is provided with locking threaded holes at two sides for locking the second transmission shaft.

8. A coupling according to any one of claims 1, 2, 3, 4, 6 and 7 wherein the fork width L is the same as the nominal dimension of the roller set gap M, with a small clearance fit; the height H of the shifting fork is larger than the sum of the diameter D of the roller and the axial relative movement distance S of the connecting shaft.

Technical Field

The invention relates to a coupler, in particular to a rolling type coupler with connecting shafts at two sides capable of axially and relatively moving, belonging to the field of mechanical transmission technology and application.

Background

In mechanical transmission, a shaft coupling is often used to connect two shafts in different mechanisms to rotate together and transmit torque. Generally, the coupling is used for adjusting the radial centering degree, and is not suitable for a scene that the connecting shafts on the two sides have large-amplitude axial relative motion.

Patent CN111059011A discloses an axial plunger pump, which uses a cross-shaped coupling to drive a plunger to rotate and reciprocate. The shaft coupling is in a free state in the axial direction, and is easy to collide with other parts in the running process to cause damage; meanwhile, the coupler is in sliding fit with the shifting fork, and high-frequency sliding friction exists between the coupler and the shifting fork piece in the moving process, particularly under the working condition of high rotating speed. The sliding friction causes power loss, generates a large amount of heat, and easily causes abrasion and adhesion of the contact surface of the coupler and the shifting fork, so that the pump fails to work.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provides a coupler. The scheme of the invention can solve the problems in the prior art.

The technical solution of the invention is as follows:

a coupler comprises a coupler female part and a coupler male part; the coupler female part comprises a first transmission disc, rollers and roller placement grooves, the roller placement grooves are located on the first transmission disc, two rollers are arranged in each roller placement groove, and a gap matched with the coupler male part is reserved between the two rollers; the coupler male part is of a shifting fork structure, the position and the number of shifting forks of the coupler male part are matched with the position and the number of gaps between the two rollers, and the shifting forks penetrate through the coupler female part and the gaps between the two rollers in the roller placement grooves and are connected with the coupler female part.

Further, roller shaft mounting through holes are symmetrically formed in the roller containing grooves and used for mounting roller shafts, and the roller shafts are used for fixing the rollers on the first transmission disc.

Furthermore, the roller shaft is of an isometric optical axis structure and is used for supporting rollers on the same side in different roller containing grooves and is in interference fit with the roller shaft mounting through hole of the transmission disc.

Furthermore, a first flat boss is arranged at the center of the first transmission disc, and a first transmission flat opening is formed in the middle of the first flat boss; and locking threaded holes are formed in two sides of the flat boss and used for locking the transmission shaft.

Further, the gyro wheel with the gyro wheel standing groove be little clearance fit, prevent the jamming.

Preferably, the roller outer sleeve is of a waist-drum-like structure, the middle of the outer circular surface of the roller outer sleeve is higher than the two sides of the outer circular surface of the roller outer sleeve, and the outer side eccentric wear of the roller can be effectively reduced.

Furthermore, the coupling male part further comprises a second transmission disc and a second flat boss, a second transmission flat opening is formed in the middle of the second flat boss, and locking threaded holes are formed in two sides of the second flat boss and used for locking the second transmission shaft.

Furthermore, the width L of the shifting fork is the same as the nominal size of the gap M of the roller group, and the shifting fork and the gap M are in small clearance fit; the height H of the shifting fork is larger than the sum of the diameter D of the roller and the axial relative movement distance S of the connecting shaft.

The working principle is as follows: when the first connecting shaft and the second connecting shaft do not move axially relative to each other, the male coupler part and the female coupler part are connected through the shifting fork and rotate synchronously without moving axially relative to each other; when the first connecting shaft and the second connecting shaft move axially relatively, the male coupler part and the female coupler part rotate synchronously and move axially relatively;

compared with the prior art, the invention has the beneficial effects that:

(1) the coupler does not restrict the axial relative motion of the connecting pieces, and can be applied to a scene that the connecting shafts on the two sides do not have the axial relative motion and a scene that the connecting shafts have the axial motion.

(2) The coupler in the invention adopts a rolling form, so that the friction loss is smaller, the heat productivity is less, the abrasion is less and the efficiency is higher in the transmission process.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

Fig. 1 is a mounting diagram of a coupling provided according to an embodiment of the present invention, wherein a is an axial side view and b is a sectional view;

FIG. 2 is an installation view of a female coupling member according to an embodiment of the present invention, wherein a is an isometric view and b is a top view;

FIG. 3 is an exploded view of a coupling female member provided in accordance with an embodiment of the present invention;

FIG. 4 is a schematic structural view of a transmission disc provided according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of an outer side structure of a roller according to an embodiment of the present invention;

fig. 6 is a schematic structural view of a male coupling part according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a male coupling part according to an embodiment of the present invention, where a is a front view and b is a left view.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

The embodiment of the invention provides a coupler, which comprises a coupler female part and a coupler male part; the coupler female part consists of a first transmission disc, rollers and roller placement grooves, the roller placement grooves are positioned on the first transmission disc, each group of the rollers is provided with two rollers which are arranged in the roller placement grooves, and a gap matched with the coupler male part is reserved between the two rollers; the coupler male part is of a shifting fork structure, the position and the number of shifting forks of the coupler male part are matched with the position and the number of gaps between the two rollers, and the shifting forks penetrate through the coupler female part and the gaps between the two rollers in the roller placement grooves and are connected with the coupler female part.

In a further embodiment, roller shaft mounting through holes are symmetrically formed in the roller placement grooves and used for mounting roller shafts, and the roller shafts are used for fixing the rollers on the first transmission disc.

In a further embodiment, the roller shaft is of an isometric optical axis structure and is used for supporting the rollers on the same side in different roller placing grooves and is in interference fit with the roller shaft mounting through hole of the transmission disc.

Further in one embodiment, a first flat boss is arranged at the center of the transmission disc, and a first transmission flat opening is formed in the middle of the first flat boss; and locking threaded holes are formed in two sides of the first flat boss and used for locking the transmission shaft, and the first movable flat opening is used for being connected with the first transmission shaft and transmitting torque.

Further in one embodiment, the rollers and the roller placement grooves are in small clearance fit to prevent jamming.

Preferably, in one embodiment, the roller outer sleeve is of a waist-drum-like structure, and the middle of the outer circular surface of the roller outer sleeve is higher than the two sides of the outer circular surface of the roller outer sleeve, so that the outer side eccentric wear of the roller can be effectively reduced.

In a further embodiment, the male coupling part further comprises a second transmission disc and a second flat boss, a second transmission flat opening is formed in the middle of the second flat boss, and locking threaded holes are formed in two sides of the second flat boss and used for locking the second transmission shaft; the transmission flat port is used for being connected with the second transmission shaft and transmitting torque.

Further in one embodiment, the width L of the shifting fork is the same as the nominal size of the gap M of the roller group, and the shifting fork and the gap M are closely matched; the height H of the shifting fork is larger than the sum of the diameter D of the roller and the axial relative movement distance S of the connecting shaft.

In order to better explain the invention, the invention is further explained in accordance with specific embodiments in conjunction with the attached drawings. The embodiment is an application of the coupling in the invention in a novel two-dimensional piston pump. When the novel two-dimensional piston pump works, the plunger rotates in the circumferential direction to distribute flow, and the axial reciprocating motion is used for sucking and discharging oil. The plunger and the drive shaft have axial relative movement.

As shown in fig. 1, a coupling is provided according to an embodiment of the present invention, including a coupling female member 100 and a coupling male member 200; the coupler female part 100 is connected with the transmission shaft 10 and locked by a screw 30; the male coupling part 200 is connected to the plunger 20 and locked by the screw 30.

As shown in fig. 2-5, the coupling female member 100 is composed of a first transmission disc 110, two rollers 120 and two roller placement grooves 111, the roller placement grooves 111 are located on the first transmission disc 110, two rollers 120 are installed in each group in the roller placement grooves 111, and a gap matched with the coupling male member 200 is left between the two rollers 120;

as shown in fig. 3, roller mounting through holes 112 are symmetrically formed in the roller placement groove 111 for mounting the roller shaft 130, and the roller shaft 130 is used for fixing the roller 120 on the first transmission disc 110.

As shown in fig. 3, the roller shaft 130 is of an equal-diameter optical axis structure, and is used for supporting the rollers 120 on the same side in different roller placing grooves 111, and is in interference fit with the through holes for installing the roller shaft 130 of the driving disc.

As shown in fig. 4, a first flat boss 113 is arranged at the center of the first transmission disc 110, and a first transmission flat opening 114 is formed in the middle of the first flat boss 113; two sides of the flat boss 113 are provided with locking threaded holes 115 for locking the transmission shaft 10, and the first transmission flat opening 114 is used for connecting the transmission shaft 10 and transmitting torque. Preferably, the roller 120 and the roller placement groove 111 are in close clearance fit to prevent jamming.

As shown in FIG. 5, the roller 120 is sleeved with a drum-like structure, and the middle of the outer circle surface of the drum-like structure is higher than the two sides, so that the occurrence of the outer side eccentric wear of the roller 120 can be effectively reduced.

As shown in fig. 6, the male coupling member 200 has a fork structure, the positions and the number of the forks 201 are matched with the positions and the number of the gaps between the two rollers 120, and the forks 201 penetrate through the female coupling member 100 and are connected with the female coupling member 100 through the gap between the two rollers 120 in the roller placement groove 111. The male coupler part 200 further comprises a second flat boss 202, a second transmission flat opening 203 is formed in the middle of the second flat boss 202, and locking threaded holes 204 are formed in two sides of the second flat boss 202 and used for locking the plunger 20; the second flat drive port 203 is used for connecting with the plunger 20 and transmitting torque.

As shown in fig. 7, the width L of the shifting fork 201 is the same as the nominal size of the gap M of the roller 120 group, and the width L is 8mm, and the width L and the gap M are in small clearance fit; the height H of the shifting fork 201 is larger than the sum of the diameter D of the roller 120 which is 11mm and the axial relative movement distance S of the connecting shaft which is 4mm, and H is 16 mm.

During operation, the motor drives the transmission shaft 10 and the female coupler 100 to rotate, the roller 120 of the female coupler 100 compresses the shifting fork 201 of the male coupler 200 and transmits torque, and the male coupler 200 drives the plunger 20 to rotate. The plunger 20 rotates and simultaneously sucks and discharges oil in an axial reciprocating manner to drive the male coupler part 200 to reciprocate in an axial direction, and the shifting fork 201 reciprocates in the roller 120 group and is always attached tightly, so that continuous transmission of torque is guaranteed.

By adopting the coupler, the novel two-dimensional piston pump provided by the embodiment of the invention has smooth and reliable operation and small friction loss, and the efficiency is improved by 5% compared with a cross-shaped coupler scheme adopting sliding friction.

In summary, the present invention provides a coupling, which has at least the following advantages compared to the prior art:

(1) the coupler does not restrict the axial relative motion of the connecting pieces, and can be applied to a scene that the connecting shafts on the two sides do not have the axial relative motion and a scene that the connecting shafts have the axial motion.

(2) The coupler in the invention adopts a rolling form, so that the friction loss is smaller, the heat productivity is less, the abrasion is less and the efficiency is higher in the transmission process.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.