CN117469307A

CN117469307A - Coupling assembly

Info

Publication number: CN117469307A
Application number: CN202210863691.2A
Authority: CN
Inventors: 李彩雲; 漆重超
Original assignee: Guangdong Chaoliu Precision Technology Co ltd
Current assignee: Guangdong Chaoliu Precision Technology Co ltd
Priority date: 2022-07-20
Filing date: 2022-07-20
Publication date: 2024-01-30

Abstract

The invention provides a coupler assembly, which comprises a stepped shaft, a coupler bearing and a coupler fixing seat, wherein the stepped shaft is integrally T-shaped; the larger end of the stepped shaft is connected with a load to be connected; the smaller end of the stepped shaft is connected with an external power shaft to be connected and is in fit clearance connection with the external power shaft through a key slot; the coupler bearing is sleeved on the smaller end of the stepped shaft; the coupler fixing seat is sleeved on the coupler bearing, and the coupler fixing seat compresses and fixes the outer ring of the coupler bearing. The invention adopts the integral T-shaped stepped shaft, the coupler bearing, the coupler fixing seat, the first locking piece and the second locking piece to be matched with each other, and the axial movement of the inner coil and the outer coil of the coupler bearing is respectively and independently limited, so that the axial force transmitted by the load end of the coupler assembly is blocked, and the axial force is not transmitted to the power shaft end.

Description

Coupling assembly

Technical Field

The invention relates to the technical field of mechanical automation, in particular to a coupler assembly.

Background

With the continuous development of society and continuous progress of technology, the application of mechanical automatic production is becoming wider and wider. Infusion pumps are used in battery production, pharmaceutical production, biological reagents, and infusion equipment in a variety of industries including chemical engineering.

The liquid injection pump generally comprises three main parts of a driving motor end, a transmission connection assembly and a hydraulic end. Typical liquid injection pumps include vane pumps, piston pumps, diaphragm pumps, gear pumps, and screw pumps. In the process of filling batteries or pharmaceuticals with high precision, a piston pump type filling pump is generally used for filling.

Existing piston-type infusion pumps generally have the following disadvantages:

1. the piston of fluid end can give driving motor an axial reaction force through transmission coupling assembling in the reciprocating motion process, detracts driving motor's life.

2. The piston of fluid end can cause driving motor to beat owing to there is axial reaction force for driving motor, and driving motor's beat can cause the piston stroke of fluid end to walk the position inaccurately in turn, and then causes the fluid end to annotate the liquid and produce the error, causes annotating the liquid inaccurately.

The above disadvantages are mainly due to the fact that axial reaction force of the load end or axial force generated by runout of the driving motor is mutually transmitted through the transmission connecting assembly. If a coupling assembly can be developed, and the coupling assembly is used as a transmission connection assembly to connect a load end and a driving end, the axial force of the load end and the driving end can be separated, so that the coupling assembly has great market value.

Disclosure of Invention

In order to solve the problems in the prior art, the invention provides the coupler assembly which is compact in structure, safe and reliable and can cut off the axial force transmission between connected pieces. When the coupling assembly is suitable for an electrolyte injection pump in the lithium battery industry, the electrolyte injection accuracy can be improved, and the service life of the driving motor can be prolonged.

In order to achieve the above purpose, the present invention provides the following technical solutions:

a coupler assembly comprises a stepped shaft which is integrally T-shaped, a coupler bearing sleeved on the stepped shaft and a coupler fixing seat; the larger end of the stepped shaft is connected with a load to be connected; the smaller end of the stepped shaft is connected with an external power shaft to be connected and is in fit clearance connection with the external power shaft through a key slot; the coupler bearing is sleeved on the smaller end of the stepped shaft; the coupler fixing seat is sleeved on the coupler bearing, and the coupler fixing seat compresses and fixes the outer ring of the coupler bearing.

The preferred technical scheme is that the coupler assembly further comprises an annular first locking piece and an annular second locking piece, wherein the first locking piece is fixedly connected with the coupler fixing seat and abuts against the outer ring of the coupler bearing, and the outer ring of the coupler bearing is limited to move along the axial direction; the second locking piece is fixedly connected with the stepped shaft and abuts against the inner ring of the coupler bearing, and the inner ring of the coupler bearing is limited to move along the axial direction.

According to the preferable technical scheme, the annular first locking piece is provided with external threads, and the annular second locking piece is provided with internal threads; the stepped shaft is provided with an outer flange protruding outwards, and the smaller end of the stepped shaft is also provided with an external thread which is in threaded fit with the internal thread of the second locking piece; one end of the coupler fixing seat is provided with an inward protruding inner flange, and the other end of the coupler fixing seat is provided with an inner thread which is matched with the outer thread of the first locking piece in a threaded manner; one end of the inner ring of the coupler bearing is propped against the outer flange of the stepped shaft, and the other end of the inner ring of the coupler bearing is propped against the second locking piece; one end of the outer ring of the coupler bearing abuts against the inner flange of the coupler fixing seat, and the other end of the outer ring of the coupler bearing abuts against the first locking piece.

According to the preferred technical scheme, the coupler fixing seat is further provided with a threaded hole, the fastening screw is in threaded fit with the threaded hole, and the fastening screw abuts against the first locking piece to limit the first locking piece to move relative to the coupler fixing seat.

According to the preferred technical scheme, the coupler bearing is a deep groove ball bearing.

According to the preferred technical scheme, the load to be connected can be a pump head assembly of the liquid injection pump (namely, a hydraulic end of the liquid injection pump), and the external power shaft to be connected can be a motor output shaft of the liquid injection pump (namely, a driving motor end of the liquid injection pump).

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

1. the coupling assembly is connected with an external power shaft (such as a motor output shaft of a liquid injection pump) to be connected through a key slot and is in clearance fit. Therefore, no axial force transmission exists between the motor and the coupler assembly, and only radial rotating force transmission exists. The axial force transmission does not exist, and the whole mechanism runs reliably, so that the service life of the motor is prolonged.

2. The coupling component adopts the mutual matching of the stepped shaft, the coupling bearing, the coupling fixing seat, the first locking piece and the second locking piece which are integrally T-shaped, so that the coupling component blocks the axial reaction force of the load end to be connected, and the axial movement of the inner ring and the outer ring of the coupling bearing is respectively and independently limited, so that the axial force transmitted by the load end connected with the coupling component is blocked, and the axial force is not transmitted to the external power shaft (such as a motor, which is beneficial to prolonging the service life of the motor) to be connected. Meanwhile, the outer flange on the stepped shaft and the second locking piece limit the axial movement of the inner ring of the coupler bearing, and the inner flange of the coupler fixing seat and the first locking piece limit the axial movement of the outer ring of the coupler bearing, and meanwhile, the force on the outer ring of the coupler is transmitted to the coupler fixing seat through the set screw, so that the axial force is not transmitted to the end of the driving motor any more. And the axial movement of the inner ring and the outer ring of the coupler bearing is independently limited through the independent structures, so that the output power of the coupler assembly is stable and reliable, and especially the axial output of the coupler assembly is safe and reliable. When the device is applied to the transmission connecting assembly of the liquid injection pump, the device can enable the piston of the pump head assembly to reciprocate accurately and reliably, and the liquid injection of the liquid injection pump is more accurate.

Drawings

Fig. 1 is a schematic perspective view of a coupling assembly.

Fig. 2 is a schematic elevational view of the coupling assembly.

Fig. 3 is a schematic cross-sectional view of a coupling assembly.

Fig. 4 is a schematic top view of the coupling assembly.

Fig. 5 is a schematic perspective view of a stepped shaft.

Fig. 6 is a schematic front view of the stepped shaft.

Fig. 7 is a right-view structural schematic diagram of the stepped shaft.

Fig. 8 is a schematic top view of the stepped shaft.

Fig. 9 is a schematic front view of the coupling holder.

Fig. 10 is a right-side view of the coupler holder.

FIG. 11 is a schematic cross-sectional view of the structure of FIG. 10 in the direction A-A.

Fig. 12 is a schematic perspective view of a fluid pump to which the coupling assembly of the present invention is applied.

Fig. 13 is a schematic elevational view of a fluid pump employing a coupling assembly of the present invention.

Fig. 14 is a schematic top view of a fluid pump employing a coupling assembly of the present invention.

Fig. 15 is a right side view of a schematic construction of a fluid infusion pump employing a coupling assembly of the present invention.

Fig. 16 is a perspective view of a connection structure among the base, the rotating plate assembly, and the angle adjusting assembly.

Fig. 17 is a front schematic view of a connection structure between the base, the rotating plate assembly, and the angle adjusting assembly.

Fig. 18 is a schematic left view of a connection structure between the base, the rotating plate assembly, and the angle adjusting assembly.

Fig. 19 is a right side view schematically showing a connection structure between the base, the rotating plate assembly, and the angle adjusting assembly.

Fig. 20 is a perspective view of a connection structure between the rotating plate assembly and the fork shaft.

Fig. 21 is a perspective view showing a connection structure among the rotary plate, the slide fork shaft, and the differential bolts.

Fig. 22 is a schematic structural view of the differential bolt.

Fig. 23 is a schematic structural view of the slip yoke.

Fig. 24 is a schematic view of a connection structure between the differential bolt and the fork shaft.

Fig. 25 is a schematic perspective view of a universal ball joint link.

Marked in the figure as:

1-a motor; a 2-coupling assembly; 21-a stepped shaft; 211-an outer flange; 22-shaft coupling bearings; 23-a coupler fixing seat; 231-inner flange; 232-a threaded hole; 24-a first locking member; 25-a second locking member; 26-set screw; 3-a pump head assembly; 4-universal ball connecting rod; 41-a universal ball; 42-connecting rods; 5-a base; 51-rotating plate; a 6-rotating plate assembly; 61-rotating plate; 611-binaural plates; 62-rotating shaft; 7-an angle adjustment assembly; 71-differential bolts; 711-smaller thread segments; 712-larger thread segments; 713-springs; 72-a slip yoke; 721-monaural board.

Detailed Description

An embodiment of a coupling assembly according to the present invention will be further described with reference to fig. 1 to 15.

The invention relates to a coupler assembly 2, which comprises a stepped shaft 21 with a T shape integrally, a coupler bearing 22 sleeved on the stepped shaft 21 (the coupler bearing can adopt various conventional bearings such as deep groove ball bearings) and a coupler fixing seat 23; the larger end of the stepped shaft is connected with a piston (namely a load to be connected) of the piston pump 3 through a universal ball connecting rod 4;

the ball joint link 4 includes a ball 41 and a link rod 42 which is inserted into the ball 41 and moves. In this embodiment, the universal ball 41 of the universal ball head connecting rod 4 is rotatably embedded in the piston of the piston pump 3, one end of the connecting rod 42 of the universal ball head connecting rod 4 is fixed on the stepped shaft 21 of the coupler assembly 2, and the other end of the connecting rod 42 is inserted into the universal ball 41 in the piston; the connecting rod 42 can slide in the universal ball 41, the motor 1 rotates to drive the coupler assembly 2 to rotate, the connecting rod 42 driving the universal ball head connecting rod 4 can move in the universal ball 41, and the piston of the piston pump 3 is driven to reciprocate. Of course, in other embodiments, the universal ball 41 of the universal ball-head connecting rod 4 may be embedded in the stepped shaft 21 of the coupling assembly 2, one end of the connecting rod 42 of the universal ball-head connecting rod 4 is fixed on the piston of the piston pump 3, and the other end of the connecting rod 42 is inserted into the universal ball 41 located in the stepped shaft 21; the motor 1 drives the stepped shaft 21 of the coupler assembly 2 to rotate, drives the connecting rod 42 to slide in the universal ball 41, and drives the piston of the piston pump 3 to reciprocate.

The smaller end of the stepped shaft 21 is connected with the output shaft of the motor 1 (namely an external power shaft to be connected) through a key slot fit clearance; the coupler bearing 22 is sleeved on the smaller end of the stepped shaft 21; the coupler fixing seat 23 is sleeved on the coupler bearing 22, and the coupler fixing seat 23 tightly fixes the outer ring of the coupler bearing 22.

The coupling assembly 2 further comprises an annular first locking member 24 and an annular second locking member 25, wherein the first locking member 24 is fixedly connected with the coupling fixing seat 23 and abuts against the outer ring of the coupling bearing 22, so that the outer ring of the coupling bearing 22 is limited to move along the axial direction; the second locking member 25 is fixedly connected with the stepped shaft 21 and abuts against the inner ring of the coupling bearing 22, so as to limit the inner ring of the coupling bearing 22 from moving in the axial direction.

The annular first locking member 24 is provided with external threads, and the annular second locking member 25 is provided with internal threads; the stepped shaft 21 has an outer flange 211 protruding outwards, and the smaller end of the stepped shaft 21 is also provided with an external thread which is in threaded engagement with the internal thread of the second locking member 25; one end of the coupler fixing seat 23 is provided with an inward protruding inner flange 231, and the other end of the coupler fixing seat 23 is provided with an inner thread which is in threaded fit with the outer thread of the first locking piece 24; one end of the inner ring of the coupler bearing 22 is propped against the outer flange 211 of the stepped shaft 21, and the other end of the inner ring of the coupler bearing 22 is propped against the second locking piece 25; one end of the outer ring of the coupler bearing 22 abuts against the inner flange 231 of the coupler fixing seat 23, and the other end of the outer ring of the coupler bearing 22 abuts against the first locking member 24. Preferably, the inner diameter of the first locking member 24 is larger than the outer diameter of the second locking member 25, and the second locking member 25 passes through the inner diameter of the first locking member 24 to abut against the inner ring of the coupling bearing 22.

The coupler fixing seat 23 is also provided with a threaded hole 232, the fastening screw 26 is in threaded fit with the threaded hole 232, and the fastening screw 26 abuts against the first locking member 24 to limit the first locking member 24 to move relative to the coupler fixing seat 23.

An example of an application of a liquid pump to which a coupling assembly of the present invention is applied will be further described with reference to fig. 1 to 25. The liquid injection pump comprises a motor 1, a coupler assembly 2 connected with an output shaft of the motor 1, and a pump head assembly 3 connected with the coupler assembly 2; the pump head assembly 3 is a piston pump; the output shaft of the motor 1 is connected with the coupler assembly 2 through a key slot fit clearance; the coupler assembly 2 is connected with the pump head assembly 3 through a universal ball connecting rod 4; the output shaft of the motor 1 and the axle center of the coupler assembly 2 are distributed in a straight line; the axis of the pump head assembly 3 and the axis of the coupler assembly 2 form a certain included angle; the motor 1 drives the coupler assembly 2 to rotate; the coupler assembly 2 drives a piston of the piston pump to reciprocate through the universal ball-head connecting rod 4.

The coupling assembly 2 comprises a stepped shaft 21 which is integrally T-shaped, a coupling bearing 22 sleeved on the stepped shaft 21 (the coupling bearing can adopt various conventional bearings such as deep groove ball bearings) and a coupling fixing seat 23; the larger end of the stepped shaft is connected with a piston of the piston pump 3 through a universal ball connecting rod 4;

The smaller end of the stepped shaft 21 is connected with the output shaft of the motor 1 through a key slot fit clearance; the coupler bearing 22 is sleeved on the smaller end of the stepped shaft 21; the coupler fixing seat 23 is sleeved on the coupler bearing 22, and the coupler fixing seat 23 tightly fixes the outer ring of the coupler bearing 22.

The liquid injection pump also comprises a base 5, a rotating plate component 6 and an angle adjusting component 7; the rotating plate assembly 6 rotatably mounts the pump head assembly 3 on the base 5; the angle adjusting assembly 7 is connected with the rotating plate assembly 6, and adjusts the installation angle of the pump head assembly 3 by driving the rotating plate assembly 6 to rotate.

The rotating plate assembly 6 comprises a rotating plate 61 and a rotating shaft 62; the angle adjusting assembly 7 comprises a differential bolt 71 and a sliding fork shaft 72; the pump head assembly 3 is fixedly arranged on the rotating plate 61, and the rotating shaft 62 rotatably mounts the rotating plate 61 on the base 5; the differential bolt 71 has a smaller thread section 711 and a larger thread section 712; one end of the sliding fork shaft 72 is connected with the rotating plate 61, and the other end of the sliding fork shaft 72 is in threaded connection with a smaller threaded section 711 of the differential bolt 71; the larger threaded section 712 of the differential bolt 71 is threadedly connected to the base 5. The shape of the slip yoke 72 may vary, and one of the slip yoke 72 may be shaped as a single lug 721 at one end and threaded at the other end. The connection between the rotary plate 61 and the fork shaft 72 may be varied, and one of them is that the connection end between the rotary plate 61 and the fork shaft 72 has a double-lug plate 611 structure, the single-lug plate 721 of the fork shaft 72 is inserted into the double-lug plate 611 of the rotary plate 61, and the double-lug plate 611 of the rotary plate 61 is connected to the single-lug plate 721 of the fork shaft 72 by a pin.

The base 5 is provided with a rotating plate 51; the rotating plate 51 is rotatably installed on the base 5 through a pin shaft, and the rotating plate 51 is provided with an internal thread through hole; the internally threaded through bore of the rotating plate 51 is in threaded engagement with the larger threaded section 712 of the differential bolt 71; the slip yoke shaft 72 and the differential bolt 71 are further sleeved with a spring 713. The spring 713 can prevent the differential bolt 71 from slipping loose. The rotation plate 51 is adopted to directly connect the differential bolt 71 and the base 5, so that the differential bolt 71 is free from blocking phenomenon in the process of adjusting the angle, and the adjusting angle of the differential bolt is greatly increased. That is, the rotating plate 51 may be rotated by a certain angle while the differential bolts 71 are fed, so that the differential bolts 71 may be self-adapted to a possible locking phenomenon due to the angular variation of the rotating plate.

The manner in which the slip shaft 72 is screwed with the differential bolt 71 may be: if the sliding fork shaft 72 is externally threaded, the smaller threaded section 711 of the differential bolt 71 is internally threaded, and the specific implementation manner may be to provide an axial blind hole at the end of the differential bolt 71 connected to the sliding fork shaft 72, and then tap an internal thread matching the external thread on the sliding fork shaft 72 in the blind hole. Of course, the sliding fork shaft 72 may be internally threaded, and the smaller threaded section 711 of the differential bolt 71 may be externally threaded. The concrete implementation mode is that an axial blind hole is formed in one end, connected with the differential bolt 71, of the sliding fork shaft 72, internal threads are tapped in the blind hole of the sliding fork shaft 72, and the internal threads of the sliding fork shaft 72 are matched with smaller section threads 711 of the differential bolt 71.

The working principle of the liquid injection pump of the invention is as follows:

the motor of the liquid injection pump is connected with the coupler component through a key slot and is in clearance fit. Therefore, no axial force transmission exists between the motor and the coupler assembly, and only radial rotating force transmission exists. Meanwhile, a certain included angle is formed between the coupling assembly and the pump head assembly through the axial center distribution, and the coupling assembly is connected with the pump head assembly through a universal connecting rod. Because a certain included angle exists between the axes and the universal connecting rod is adopted for connection, the rotary motion transmitted by the motor received by the coupler assembly can be converted into the reciprocating motion of the piston pump piston of the pump head assembly. According to the coupler component of the injection pump, the stepped shaft, the coupler bearing, the coupler fixing seat, the first locking piece and the second locking piece which are integrally T-shaped are mutually matched, so that the axial reaction force of the load end of the pump head component is blocked by the coupler, and the axial movement of the inner coil and the outer coil of the coupler bearing is respectively and independently limited, so that the axial force transmitted by the load end of the coupler component is blocked, the axial force is not transmitted to the motor, and the service life of the motor is prolonged. Meanwhile, the outer flange on the stepped shaft and the second locking piece limit the axial movement of the inner ring of the coupler bearing, and the inner flange of the coupler fixing seat and the first locking piece limit the axial movement of the outer ring of the coupler bearing, and meanwhile, the force on the outer ring of the coupler is transmitted to the coupler fixing seat through the set screw, so that the axial force is not transmitted to the end of the driving motor any more. And the axial movement of the inner ring and the outer ring of the coupler bearing is independently limited through the independent structures, so that the output power of the coupler assembly is stable and reliable, and especially the axial output of the coupler assembly is safe and reliable, so that the piston of the pump head assembly can reciprocate accurately and reliably, and the liquid injection of the liquid injection pump is more accurate. The pump head component of the injection pump is rotatably fixed on the base and is matched with the angle adjusting component, when different injection amounts are needed, the stroke of the piston pump of the pump head component during reciprocating operation can be changed only by adjusting the distribution angle between the pump head component and the axle center of the coupling component, so that the purpose of adjusting the injection amount of the injection pump is realized. The angle adjusting component adopts a structure that the differential bolts are matched with the sliding fork shafts, so that the rotating angle of the rotating component can be accurately adjusted.

The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.

Claims

1. A coupling assembly, characterized in that: the device comprises a T-shaped integral stepped shaft, a coupler bearing sleeved on the stepped shaft and a coupler fixing seat; the larger end of the stepped shaft is connected with a load to be connected; the smaller end of the stepped shaft is connected with an external power shaft to be connected and is in fit clearance connection with the external power shaft through a key slot; the coupler bearing is sleeved on the smaller end of the stepped shaft; the coupler fixing seat is sleeved on the coupler bearing, and the coupler fixing seat compresses and fixes the outer ring of the coupler bearing.

2. A coupling assembly according to claim 1, wherein: the coupler assembly further comprises an annular first locking piece and an annular second locking piece, wherein the first locking piece is fixedly connected with the coupler fixing seat and abuts against the outer ring of the coupler bearing, and the outer ring of the coupler bearing is limited to move along the axial direction; the second locking piece is fixedly connected with the stepped shaft and abuts against the inner ring of the coupler bearing, and the inner ring of the coupler bearing is limited to move along the axial direction.

3. A coupling assembly according to claim 2, wherein: the annular first locking piece is provided with an external thread, and the annular second locking piece is provided with an internal thread; the stepped shaft is provided with an outer flange protruding outwards, and the smaller end of the stepped shaft is also provided with an external thread which is in threaded fit with the internal thread of the second locking piece; one end of the coupler fixing seat is provided with an inward protruding inner flange, and the other end of the coupler fixing seat is provided with an inner thread which is matched with the outer thread of the first locking piece in a threaded manner; one end of the inner ring of the coupler bearing is propped against the outer flange of the stepped shaft, and the other end of the inner ring of the coupler bearing is propped against the second locking piece; one end of the outer ring of the coupler bearing abuts against the inner flange of the coupler fixing seat, and the other end of the outer ring of the coupler bearing abuts against the first locking piece.

4. A coupling assembly as claimed in claim 4, wherein: the coupler fixing seat is also provided with a threaded hole, the threaded hole is matched with the fastening screw through threads, and the fastening screw abuts against the first locking piece to limit the first locking piece to move relative to the coupler fixing seat.

5. A coupling assembly according to claim 1, wherein: the coupler bearing is a deep groove ball bearing.