Eccentric bearing reciprocating mechanism for electric diaphragm pump

Abstract

An eccentric bearing reciprocating mechanism for an electric diaphragm pump, comprising a driving assembly, a carrier and a reciprocating assembly. The driving assembly comprises a driving motor and a speed reducer. The carrier is used to accommodate the reciprocating assembly. The reciprocating assembly comprises an input shaft connected with the speed reducer, an eccentric bearing connected with the input shaft and a connecting rod shaft sleeved outside the eccentric bearing. The input shaft is used to transmit the torque of the speed reducer to the eccentric bearing and drive the eccentric bearing to make eccentric rotary motion. The eccentric bearing is used to convert the eccentric rotary motion into the linear reciprocating motion of the connecting rod shaft to drive the diaphragm of the electric diaphragm pump to make reciprocating motion to complete water suction and drainage. The input shaft and the eccentric bearing cooperate to drive the diaphragm of the electric diaphragm pump reciprocatingly, which improves the rigidity and stability of the reciprocating assembly.

Description

Technical Field

[0001] This utility model belongs to the field of diaphragm pump technology, and in particular, it is an eccentric bearing reciprocating motion mechanism for electric diaphragm pumps. Background Technology

[0002] A diaphragm pump is a type of displacement pump that uses the reciprocating deformation of a diaphragm to change the volume of its working chamber to transport liquids. It belongs to the actuator category and is mainly used in chemical, ceramic, and wastewater treatment industries. An electric diaphragm pump is a newer type of pump. The motor, through a gearbox, drives the diaphragm on the plungers at both ends to reciprocate, causing a change in the volume of the working chamber, thereby continuously drawing in and discharging liquid.

[0003] However, in existing electric diaphragm pumps, the reducer and eccentric bearing are directly connected, and the connecting rod is driven to reciprocate through the eccentric bearing. But the eccentric bearing is only connected to one end of the reducer, forming a single-support cantilever structure with the reducer. This structure has poor rigidity and is prone to large vibrations during operation, thus affecting the service life of the machine.

[0004] For example, in the utility model patent with publication number CN209354334U, the eccentric bearing is directly connected to the drive motor. The eccentric bearing is only connected to the drive motor at one end, forming a single-arm support structure. The overall rigidity structure is poor, which can easily cause large vibrations when the diaphragm pump is working, thereby affecting the service life of the machine. Summary of the Invention

[0005] In view of this, the present invention provides an eccentric bearing reciprocating motion mechanism for an electric diaphragm pump to solve the above problems.

[0006] An eccentric bearing reciprocating motion mechanism for an electric diaphragm pump includes a drive assembly, a carrier connected to the drive assembly, and a set of reciprocating motion components located within the carrier. The drive assembly provides driving power to the reciprocating motion components. The drive assembly includes a geared motor. The carrier supports the reciprocating motion components. Each reciprocating motion component includes an input shaft connected to the geared motor, an eccentric bearing connected to the input shaft, and a connecting rod shaft sleeved around the eccentric bearing.

[0007] Furthermore, the drive assembly also includes a drive motor for providing drive power to the reducer.

[0008] Furthermore, the support member is a hollow circular shell.

[0009] Furthermore, the reciprocating motion assembly also includes two linear bearings located on both sides of the connecting rod shaft, and a deep groove ball bearing located on the input shaft away from the reducer.

[0010] Furthermore, the linear bearing is used to guide the linear reciprocating motion of the connecting rod shaft, thereby improving the motion accuracy and stability of the connecting rod shaft.

[0011] Furthermore, the deep groove ball bearing is used to guide the rotational motion of the input shaft to improve the motion accuracy and stability of the input shaft. The deep groove ball bearing and the reducer are located at the two ends of the input shaft, respectively.

[0012] Furthermore, the connecting rod shaft includes a connecting rod shaft body, a pair of first through holes formed on the side wall of the connecting rod shaft body for the input shaft to pass through, and a pair of second through holes formed on the side wall of the connecting rod shaft body for the eccentric bearing to pass through.

[0013] Furthermore, the second through hole is perpendicular to the first through hole, and the two are not connected to each other.

[0014] Furthermore, the reciprocating assembly also includes a key assembly connected to the input shaft. The key assembly includes a first key located at one end of the input shaft and connected to the eccentric bearing, a second key located at the other end of the input shaft and connected to the reducer, a first keyway located on the eccentric bearing and opposite to the first keyway, and a second keyway located on the reducer and opposite to the second keyway.

[0015] Furthermore, the reciprocating motion assembly also includes a bearing end cap disposed outside the deep groove ball bearing, the bearing end cap being used to mount the deep groove ball bearing.

[0016] Compared with existing technologies, the eccentric bearing reciprocating motion mechanism for an electric diaphragm pump provided by this utility model drives the eccentric bearing to rotate eccentrically via the input shaft, and drives the connecting rod shaft to reciprocate linearly via the eccentric bearing, thereby driving the diaphragm of the electric diaphragm pump to reciprocate linearly. Compared to the traditional method of directly connecting the eccentric bearing to the reducer, this utility model sets the input shaft between the reducer and the eccentric bearing, and sets the deep groove ball bearing at the other end of the input shaft, making the input shaft a double-support structure. Compared to the previous method of simply inserting the eccentric bearing into the reducer, this improves the motion rigidity of the reciprocating motion component, reduces vibration during unit operation, and extends the service life of the unit. Attached Figure Description

[0017] Figure 1 This utility model provides a structural schematic diagram of an eccentric bearing reciprocating motion mechanism for an electric diaphragm pump.

[0018] Figure 2for Figure 1 An exploded view of the reciprocating motion mechanism of the eccentric bearing used in an electric diaphragm pump.

[0019] Figure 3 for Figure 2 An exploded view of the reciprocating motion mechanism of the eccentric bearing used in an electric diaphragm pump in another direction.

[0020] Figure 4 for Figure 1 A cross-sectional schematic diagram of the eccentric bearing reciprocating motion mechanism used in an electric diaphragm pump.

[0021] Figure 5 for Figure 1 A schematic diagram of the connecting rod shaft in the eccentric bearing reciprocating motion mechanism of an electric diaphragm pump. Detailed Implementation

[0022] The specific embodiments of this utility model are described in further detail below. It should be understood that the description of the embodiments of this utility model herein is not intended to limit the scope of protection of this utility model.

[0023] like Figures 1 to 5 The diagram shows a structural schematic of an eccentric bearing reciprocating motion mechanism for an electric diaphragm pump provided by this utility model. The eccentric bearing reciprocating motion mechanism for the electric diaphragm pump includes a drive assembly 10, a support member 20 connected to the drive assembly 10, and a set of reciprocating motion components 30 located within the support member 20. The eccentric bearing reciprocating motion mechanism for the electric diaphragm pump also includes other functional modules, such as assembly components for installing the eccentric bearing reciprocating motion mechanism, etc., which should be known to those skilled in the art and will not be described in detail here.

[0024] like Figure 2 As shown, the drive assembly 10 is used to provide driving power for the reciprocating motion assembly 30, and includes a drive motor 11 and a reducer 12 key-connected to the drive motor 11.

[0025] The drive motor 11 is used to provide driving power for the reducer 12. The drive motor 11 is a type of motor, which refers to an electromagnetic device that realizes the conversion or transmission of electrical energy based on the law of electromagnetic induction. It should be considered existing technology and will not be described in detail here.

[0026] The speed reducer 12 is used to convert the rotational speed of the drive motor 11 into the operating speed of the input shaft 31. The speed reducer 12 is a transmission device for low speed and high torque, which reduces the speed of electric motors, internal combustion engines or other high-speed power sources by meshing a gear with fewer teeth on the input shaft with a large gear on the output shaft. This is a well-known concept to those skilled in the art and will not be described in detail here.

[0027] like Figure 1 As shown, the support member 20 is used to accommodate the reciprocating motion component 30, and it is a hollow circular shell. The size and shape of the support member 20 can be set according to actual needs, as long as it can accommodate the reciprocating motion component 30, and no specific limitation is made here. The support member 30 is made of metal materials such as steel, so it has better load-bearing strength.

[0028] like Figure 3 As shown, the reciprocating motion assembly 30 includes an input shaft 31 keyed to the reducer 12, an eccentric bearing 32 connected to the input shaft 31, a connecting rod shaft 33 sleeved outside the eccentric bearing 32, two linear bearings 34 located on both sides of the connecting rod shaft 33, and a deep groove ball bearing 35 located at the end of the input shaft 31 away from the reducer 12.

[0029] The input shaft 31 is used to transmit the torque of the reducer 12 to the eccentric bearing 32 and drive the eccentric bearing 32 to rotate. The input shaft 31 is located between the eccentric bearing 32 and the reducer 12, with one end connected to the reducer 12 by a key and the other end inserted into the eccentric bearing 32.

[0030] The reciprocating motion assembly 30 further includes a key assembly 36 connected to the input shaft 31. The key assembly 36 includes a first key 361 located at one end of the input shaft 31 and connected to the eccentric bearing 32, and a second key 362 located at the other end of the input shaft 31 and connected to the reducer 12.

[0031] The first flat key 361 is located between the input shaft 31 and the eccentric bearing 32, with one end connected to the input shaft 31 and the other end connected to the eccentric bearing 32. The first flat key 361 is used to fix the eccentric bearing 32 onto the input shaft 31 so that both have the same motion state. A flat key is a mechanical component used for dynamic connections. It relies on two sides as working surfaces and transmits torque through the pressing of the key against the sides of the keyway. This is existing technology and will not be described in detail here.

[0032] The second flat key 362 is located between the input shaft 31 and the reducer 12, with one end connected to the input shaft 31 and the other end connected to the reducer 12. The second flat key 362 is used to fix the input shaft 31 to the reducer 12.

[0033] like Figure 3 As shown, the flat key assembly 36 further includes a first keyway 363 located on the eccentric bearing 32 and disposed opposite to the first flat key 361, and a second keyway 364 located on the reducer 12 and disposed opposite to the second flat key 362.

[0034] The eccentric bearing 32 is used to convert the rotational motion of the input shaft 31 into eccentric rotational motion. The eccentric bearing 32 passes through the input shaft 31 and is sleeved on the outside of the input shaft 31. The eccentric bearing 32 also passes through the second through hole 333 and is located inside the connecting rod shaft 33. The eccentric bearing 32 is a bearing whose inner hole and outer circle do not coincide, and it is widely used in speed reducers, petrochemicals, textile machinery, and other fields. It should be considered existing technology and will not be described in detail here.

[0035] like Figure 5 As shown, the connecting rod shaft 33 is used to perform reciprocating linear motion under the movement of the eccentric bearing 32, thereby driving the diaphragm of the electric diaphragm pump to reciprocate, so as to complete water intake and drainage. The connecting rod shaft 33 is sleeved on the eccentric bearing 32 and moves with the movement of the eccentric bearing 32. The connecting rod shaft 33 includes a connecting rod shaft body 331, a pair of first through holes 332 opened on the side wall of the connecting rod shaft body 31 for the input shaft 31 to pass through, and a pair of second through holes 333 opened on the side wall of the connecting rod shaft body 31 for the eccentric bearing 32 to pass through.

[0036] The connecting rod shaft body 331 is used to abut against the diaphragm of the electric diaphragm pump (not shown) to complete water intake and drainage during the reciprocating motion of the diaphragm of the electric diaphragm pump (not shown).

[0037] The first through hole 332 is for the input shaft 31 to pass through, and it is a rectangular through hole.

[0038] The second through hole 333 is for the eccentric bearing 32 to pass through, and it is an oblong through hole. The second through hole 333 is perpendicular to the first through hole 332, and the two are not connected to each other.

[0039] The linear bearing 34 is used to guide the linear reciprocating motion of the connecting rod shaft 33, thereby improving the motion accuracy and stability of the connecting rod shaft 33. Two linear bearings 34 are respectively sleeved on both sides of the connecting rod shaft 33. The linear bearing 34 is a linear motion guiding mechanism used in conjunction with a linear guide shaft; it should be considered prior art and will not be described in detail here.

[0040] like Figure 4 As shown, the deep groove ball bearing 35 is used to guide the rotational movement of the input shaft 31, thereby improving the motion accuracy and stability of the input shaft 31. The deep groove ball bearing 35 and the reducer 12 are located at opposite ends of the input shaft 21. The deep groove ball bearing 35 is one of the most widely used types of rolling bearings. Due to its simple structure, it can achieve higher manufacturing precision compared to other types of rolling bearings. It should be considered existing technology and will not be described in detail here.

[0041] The reciprocating motion assembly 30 also includes a bearing end cap 37 disposed outside the deep groove ball bearing 35. The bearing end cap 37 is used to install the deep groove ball bearing 35 and cooperates with the deep groove ball bearing 35 to ensure that the input shaft 31 does not move axially.

[0042] Compared with the prior art, the eccentric bearing reciprocating motion mechanism for an electric diaphragm pump provided by this utility model drives the eccentric bearing 32 to rotate eccentrically through the input shaft 31, and drives the connecting rod shaft 33 to reciprocate linearly through the eccentric bearing 32, thereby driving the diaphragm of the electric diaphragm pump to reciprocate linearly. Compared with the traditional method of directly connecting the eccentric bearing 32 to the reducer 12, this utility model sets the input shaft 31 between the reducer 12 and the eccentric bearing 32, and sets the deep groove ball bearing 35 at the other end of the input shaft 31, making the input shaft 31 a double-support structure. Compared with the previous method of simply inserting the eccentric bearing 32 into the reducer 12, this improves the motion rigidity of the reciprocating motion component, reduces the vibration of the unit's movement, and extends the service life of the unit.

[0043] The above are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Any modifications, equivalent substitutions or improvements within the spirit of the present utility model are covered within the scope of the claims of the present utility model.

Claims

1. An eccentric bearing reciprocating motion mechanism for an electric diaphragm pump, characterized in that: The eccentric bearing reciprocating motion mechanism for an electric diaphragm pump includes a set of drive components, a carrier connected to the drive components, and a set of reciprocating motion components located in the carrier. The drive components provide driving power to the reciprocating motion components. The drive components include a geared motor. The carrier supports the reciprocating motion components. The reciprocating motion components include an input shaft connected to the geared motor, an eccentric bearing connected to the input shaft, and a connecting rod shaft sleeved outside the eccentric bearing.

2. The eccentric bearing reciprocating motion mechanism for an electric diaphragm pump as described in claim 1, characterized in that: The drive assembly also includes a drive motor for providing drive power to the reducer.

3. The eccentric bearing reciprocating motion mechanism for an electric diaphragm pump as described in claim 1, characterized in that: The support component is a hollow circular shell.

4. The eccentric bearing reciprocating motion mechanism for an electric diaphragm pump as described in claim 1, characterized in that: The reciprocating motion assembly also includes two linear bearings located on both sides of the connecting rod shaft, and a deep groove ball bearing located on the input shaft away from the reducer.

5. The eccentric bearing reciprocating motion mechanism for an electric diaphragm pump as described in claim 4, characterized in that: The linear bearing is used to guide the linear reciprocating motion of the connecting rod shaft, thereby improving the motion accuracy and stability of the connecting rod shaft.

6. The eccentric bearing reciprocating motion mechanism for an electric diaphragm pump as described in claim 4, characterized in that: The deep groove ball bearing is used to guide the rotational motion of the input shaft to improve the motion accuracy and stability of the input shaft. The deep groove ball bearing and the reducer are located at the two ends of the input shaft, respectively.

7. The eccentric bearing reciprocating motion mechanism for an electric diaphragm pump as described in claim 1, characterized in that: The connecting rod shaft includes a connecting rod shaft body, a pair of first through holes formed on the side wall of the connecting rod shaft body for the input shaft to pass through, and a pair of second through holes formed on the side wall of the connecting rod shaft body for the eccentric bearing to pass through.

8. The eccentric bearing reciprocating motion mechanism for an electric diaphragm pump as described in claim 7, characterized in that: The second through hole is perpendicular to the first through hole, and the two are not connected to each other.

9. The eccentric bearing reciprocating motion mechanism for an electric diaphragm pump as described in claim 1, characterized in that: The reciprocating assembly further includes a key assembly connected to the input shaft. The key assembly includes a first key located at one end of the input shaft and connected to the eccentric bearing, a second key located at the other end of the input shaft and connected to the reducer, a first keyway located on the eccentric bearing and opposite to the first keyway, and a second keyway located on the reducer and opposite to the second keyway.

10. The eccentric bearing reciprocating motion mechanism for an electric diaphragm pump as described in claim 6, characterized in that: The reciprocating motion assembly also includes a bearing end cap disposed outside the deep groove ball bearing, the bearing end cap being used to mount the deep groove ball bearing.

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