Pump and drive assembly

Abstract

The invention provides a pump and a drive assembly. The pump assembly includes a pump module configured to be supported by the fluid tank and a drive module configured to be supported by the pump module. The drive module is mountable to and demountable from the pump module. The drive module provides motive power to the pump module to drive pumping of the pump module.

Description

[0001] This application is a divisional application of the Chinese national phase patent application with application number 202180039082.9, which was filed on May 27, 2021, with international application number PCT / US2021 / 034471 and international application date of May 27, 2021, entitled "Pump and Drive Assembly". Technical Field

[0002] This disclosure generally relates to pumps. More specifically, this disclosure relates to modular pump parts and assemblies. Background Technology

[0003] Pumps are used to pump materials downstream from a location, for example, by drawing fluid from a container and driving the fluid downstream. In an axial displacement pump, the pump rod is attached to a reciprocating drive that pushes and pulls the pump rod, thereby pumping fluid from the container and downstream. The pump rod is typically attached to the reciprocating drive by a pin that passes through the pump rod and secures it to the reciprocating drive. Pinning the pump rod to the reciprocating drive or removing the pump rod from the reciprocating drive requires loose parts and various tools and is a time-consuming process. The fluid handling component of a pumping system is typically mounted on and removed from the drive section of the pumping system. The fluid handling component may include a pump housing supported by a frame or housing of the drive section. Summary of the Invention

[0004] According to one aspect of the invention, a pump assembly is configured to pump material from a fluid tank having an opening for entry into the fluid tank. The pump assembly includes a pump module configured to be supported by the fluid tank and a drive module removably mounted to the pump module. The pump module includes: a mounting base; a cylinder extending from the mounting base along a pump axis in a first axial direction and configured to be at least partially disposed within the fluid tank; and a piston assembly extending into the cylinder, the piston assembly being configured to reciprocate along the pump axis to pump material from the fluid tank. The drive module includes: an electric motor operably connected to the piston assembly via a dynamic interface; and a drive module support configured to engage with a mounting frame at a static interface, wherein the drive module is supported on the pump module at the static interface.

[0005] According to an additional or alternative aspect of this disclosure, a pump assembly configured to pump material from a fluid tank having an opening for entry into the fluid tank, the pump assembly comprising: a pump module configured to extend at least partially through the opening and into the fluid tank to contact material within the fluid tank, the pump module including a piston configured to reciprocate along a pump axis to pump the material; and a drive module detachably mounted to the pump module via a static interface and a dynamic interface, wherein the drive module is operatively connected to the piston at the dynamic interface to power the reciprocating motion of the piston, and wherein the drive module is structurally supported on the pump module at the static interface; wherein the drive module can be mounted to the fluid module from multiple orientations.

[0006] According to another additional or alternative aspect of this disclosure, a pump module configured to be supported by and pump fluid from a fluid tank, the pump module comprising: a mounting base configured to engage with the fluid tank to support the pump module relative to the fluid tank; a piston assembly extending into the fluid tank and configured to reciprocate along a pump axis to pump material from the fluid tank, wherein a connecting end of the piston assembly extends out of the mounting base in a first axial direction; and a protrusion extending from the mounting base in the first axial direction. Attached Figure Description

[0007] Figure 1 This is a schematic block diagram of a modular pump assembly.

[0008] Figure 2 It is an isometric view of the pump assembly and fluid tank, showing a partial cross-section of the supply cylinder.

[0009] Figure 3A This is an isometric view of the pump assembly.

[0010] Figure 3B It is along Figure 3A The image shows a cross-sectional view of a portion of the pump assembly, taken from line BB.

[0011] Figure 3C It is along Figure 3A The image shows an isometric sectional view of a portion of the pump assembly, taken from line BB.

[0012] Figure 4 This is a partial exploded view of the pump assembly, showing a portion of the synchronization housing.

[0013] Figure 5 It is an isometric view showing the drive module installed on and supported by the pump module.

[0014] Figure 6 This is an isometric view of the pump assembly, showing the removal of fasteners.

[0015] Figure 7AThis is a first isometric view of the pump assembly, showing that the fasteners have been removed and the door is open.

[0016] Figure 7B This is a second isometric view of the pump assembly, showing that the fasteners have been removed and the door is open.

[0017] Figure 8 This is an isometric view of the pump assembly, in which the drive module slides laterally relative to the pump module.

[0018] Figure 9 This is an isometric view of the pump assembly, in which the drive module is completely detached from the pump module.

[0019] Figure 10 This is a 3D view of the driver module from the bottom side.

[0020] Figure 11 This is an isometric view of a part of the pump module.

[0021] Figure 12A It is along Figure 11 The enlarged cross-sectional view of a portion of the pump assembly, taken by line AA, shows the static and dynamic interfaces between the drive module and the pump module.

[0022] Figure 12B It is along Figure 12A The enlarged cross-sectional view of a portion of the pump assembly, taken by line BB, shows the static and dynamic interfaces between the drive module and the pump module.

[0023] Figure 13A This is an isometric view of the pump assembly.

[0024] Figure 13B This is a cross-sectional view of the pump assembly.

[0025] Figure 13C This is an isometric view of the pump assembly, showing the lateral displacement of the drive module relative to the pump module.

[0026] Figure 14 It is an enlarged isometric view of the interface between the display driver module and the pump module.

[0027] Figure 15A This is the first isometric view of the driver module.

[0028] Figure 15B This is the second isometric view of the driver module.

[0029] Figure 15C This is the third isometric view of the driver module.

[0030] Figure 16A This is an isometric view of the pump assembly installed in the fluid tank.

[0031] Figure 16B It is along Figure 16A The section view of the pump assembly with the motor housing removed is taken from line BB.

[0032] Figure 16C yes Figure 16A An exploded view of the pump assembly shown at equal intervals.

[0033] Figure 16D It is an enlarged isometric view of the interface between the drive module and the pump module.

[0034] Figure 17A This is an isometric exploded view of the pump assembly, showing the drive module being removed from the pump module.

[0035] Figure 17B yes Figure 17A The diagram shows a cross-sectional view of the pump assembly, with the drive module mounted on the pump module.

[0036] Figure 18 This is an isometric view of the pump assembly. Detailed Implementation

[0037] This disclosure generally relates to pumps. The pump system of this disclosure is a modular pump system having a pump module assembly supported by a reservoir containing fluid for pumping. A drive module can be mounted to and removed from the fluid module, while the pump module remains mounted on the reservoir and positioned for pumping.

[0038] Figure 1 This is a schematic block diagram of pump assembly 10. Pump assembly 10 includes drive module 12 and pump module 14. Drive module 12 includes electric motor 16. Pump module 14 includes fluid displacement member 18. Connection 20 connects drive module 12 to pump module 14 and includes dynamic interface components 22a, 22b and static interface components 24a, 24b. Fluid tank 26 is shown.

[0039] Pump assembly 10 is configured to pump liquids such as oil, mud, food, resin, isocyanate, paint, varnish, finish, stain, water, etc., from a fluid reservoir such as a bucket, cylinder, or other container to a downstream location (e.g., a dispensing tool, spray gun, reservoir, other pump, etc.). Pump assembly 10 can be powered in any desired manner to pump the liquid. For example, pump assembly 10 can be electric, pneumatic, and / or hydraulic, etc. In some examples, pump assembly 10 does not rely on any external mechanical input to power the pumping.

[0040] The drive module 12 is configured to power the pump module 14 to pump material. The drive module 12, including power components (e.g., electronic components including electronics in this example, a pneumatic switching valve including a pneumatic motor 16 in this example, etc.), is separate from the pump module 14 to isolate the power components 12 of the drive module from the pumped material. In the illustrated example, the drive module 12 may be detachably mounted to the pump module 14. The drive module 12 is configured to be structurally supported by the pump module 14. The pump module 14 is wholly or partially supported by the fluid tank 26 and configured to directly contact the material in the container during pumping. During pumping, at least a portion of the pump module 14 may be immersed in the material.

[0041] Electric motor 16 generates a mechanical output to cause pumping by pump module 14. Electric motor 16 is configured to cause movement of fluid displacement member 18 to cause pumping by pump module 14. In some examples, electric motor 16 can cause linear reciprocating motion of fluid displacement member 18 to power pumping. For example, fluid displacement member 18 can be a piston or diaphragm configured to reciprocate along an axis to pump material. In some examples, electric motor 16 is configured to generate a rotary output, but it should be understood that not all examples are so limited. For example, electric motor 16 can generate a rotary output and a driver can convert the rotary output into linear motion provided to fluid displacement member 18. A conversion driver can be connected to electric motor 16 to convert the rotary motion output from electric motor 16 into linear reciprocating motion provided to fluid displacement member 18 to drive reciprocating motion of fluid displacement member 18, such as options like eccentric cranks, Scottish yokes, screws, and nuts. In other examples, electric motor 16 can be a linear actuator, such as a solenoid or pneumatic or hydraulic actuator. In some examples, the motor axis of the motor 16 (on which the rotating parts of the motor 16 rotate or along which the linear displacement members of the motor 16 are displaced) can be aligned with the reciprocating axis of the fluid displacement member 18, wherein the drive module 12 is mounted to and supported by the pump module 14.

[0042] Drive module 12 is configured to be mounted to pump module 14 at connection 20. Drive module 12 is structurally supported by pump module 14 at connection 20 and provides mechanical motion (e.g., reciprocating motion) to drive the movement of fluid displacement member 18 at connection 20. Connection 20 includes a dynamic connection interface and a static connection interface. Pump module 14 is mechanically connected to drive module 12 at connection 20. The dynamic and static interfaces facilitate the mounting of drive module 12 to pump module 14 such that drive module 12 is supported by pump module 14 and can power pump module 14 to power pumping. Drive module 12 can be separated from pump module 14, for example, by disconnecting the static and dynamic interfaces forming connection 20 without disconnecting any electrical, pneumatic, and / or hydraulic connections. Pulling drive module 12 out of pump module 14 only disconnects the mechanical connection between drive module 12 and pump module 14.

[0043] The dynamic interface is formed by the connection between the dynamic component 22a of the drive module 12 and the dynamic component 22b of the pump module 14. The drive module 12 provides power to the pump module 14 through the dynamic interface. For example, a fluid displacement member 18 can form the dynamic component 22b of the pump module 14, which engages with the reciprocating component of the drive module 12 that forms the dynamic component 22a of the drive module 12. The fluid displacement member 18 can be connected to the reciprocating component via a slotted interface, a pin interface, or any other desired connection method.

[0044] The static interface is formed by the connection between the static component 24a of the drive module 12 (e.g., the support frame, plate, etc. of the drive module 12) and the static component 24b of the pump module 14 (e.g., the support frame, plate, etc. of the pump module 14). The drive module 12 can be structurally supported by the pump module 14 at the static interface. The drive module 12 can be fixed to the pump module 14 at the static interface to prevent disassembly of the drive module 12 from the pump module 14.

[0045] Figure 2 This is an isometric view of pump assembly 10, showing a partial cross-section of fluid tank 26. Fluid tank 26 includes an interior 28 and a top 30. Pump assembly 10 includes a drive module 12 and a pump module 14. Drive module 12 includes an electric motor 16, a bearing assembly 32, a synchronization assembly 34, an upper plate 36, and a pull rod 38. Pump module 14 includes a mounting base 40, a handle 42, a drive shaft 44, a cylinder 46, and a pipe 48. Mounting base 40 has a mounting plate 50, a fluid outlet manifold 52 with an outlet 54, and a mounting journal 56. The axis PA of pump assembly 10 is shown.

[0046] Drive module 12 and pump module 14 are coaxially mounted on pump shaft PA, with drive module 12 mounted to pump module 14. Drive module 12 is mounted to and supported by pump module 14. In the illustrated example, the upper plate 36 of drive module 12 contacts and is supported by mounting plate 50 of pump module 14. In the illustrated example, upper plate 36 directly contacts mounting plate 50 to support drive module 12 on pump module 14. The interface between upper plate 36 and mounting plate 50 can form a static connection interface between drive module 12 and pump module 14. Upper plate 36 provides a structural base for drive module 12, which engages with pump module 14 at the static connection interface. Upper plate 36 can also be referred to as a drive module support. It should be understood that upper plate 36 and mounting plate 50 do not necessarily include flat or planar interface surfaces. Upper plate 36 and mounting plate 50 can be formed as any desired configuration suitable for mating to support drive module 12 on pump module 14. For example, one or both of the upper plate 36 and the mounting plate 50 may include a block of material and are still considered to form a plate. The upper plate 36 and the mounting plate 50 do not need to be joined at the flat surface where the plate is considered to be formed.

[0047] Pump module 14 is supported by fluid tank 26. In the illustrated example, pump module 14 is entirely supported by fluid tank 26. In some examples, no other components besides fluid tank 26 support pump module 14 relative to the ground. Pump module 14 is located on and supported by fluid tank 26, which also contains the fluid to be pumped by pump module 14. Pump module 14 extends through and is supported by the top 30 of fluid tank 26. A portion of pump module 14 can be inserted through the top 30 of fluid tank 26 into the interior 28 of fluid tank 26. Fluid tank 26 contains material to be displaced by pump assembly 10. Cylinder 46 is at least partially immersed in the fluid. Drive shaft 44 extends into cylinder 46 to move fluid contact and drive components (e.g., piston head or diaphragm). In some examples, pump module 14 includes a dual-displacement pump that outputs pumped material during both the upstroke and downstroke.

[0048] In the example shown, mounting journal 56 connects pump module 14 to the top 30 of fluid tank 26. Mounting journal 56 may be threaded onto the top 30 of fluid tank 26, among other connection options. Handle 42 extends radially outward from mounting journal 56 relative to axis PA. Handle 42 may be part of an assembly detachably mounted to mounting base 40, or may be permanently attached to or formed into mounting base 40. A user can use handle 42 to grip and rotate pump module 14 while screwing mounting journal 56 into or out of the top 30 of fluid tank 26.

[0049] The fluid outlet manifold 52 is axially disposed between the motor 16 and the cylinder 46 along axis PA. The pipe 48 attaches the cylinder 46 to the fluid outlet manifold 52 and provides a fluid passage that allows fluid communication between the cylinder 46 and the fluid outlet manifold 52.

[0050] A tie rod 38 extends from the upper plate 36 and supports the motor 16. In some examples, the tie rod 38 directly and mechanically attaches the upper plate 36 to the housing of the motor 16. In other examples, the tie rod 38 attaches the upper plate 36 to the housing of the bearing assembly 32, which is connected to the housing of the motor 16. The bearing assembly 32 is axially arranged between the motor 16 and the fluid outlet manifold 52 and is coaxially arranged with the motor 16 on axis PA. The bearing assembly 32 is also axially arranged between the motor 16 and the fluid tank 26. In the example shown, a synchronizing assembly 34 is axially arranged between the bearing assembly 32 and the fluid outlet manifold 52 and is coaxially arranged with the bearing assembly 32 on axis PA. The synchronizing assembly 34 is also axially arranged between the motor 16 and the top 30 of the fluid tank 26. As discussed in more detail below, the driver connects the drive shaft 44 to the motor 16 to receive the drive output from the motor 16 and power the pumping of the pump module 14.

[0051] Figure 3A This is an isometric view of pump assembly 10. 3B is along... Figure 3A The image shows a cross-sectional view of a portion of the pump assembly 10 taken by line BB. Figure 3C It is along Figure 3A The image shows an equidistant cross-sectional view of a portion of the pump assembly 10 taken from line BB. Figures 3A-3C They will be discussed together. Pump assembly 10 includes drive module 12 and pump module 14. The drive module 12 is shown with an electric motor 16, bearing assembly 32, synchronization assembly 34, upper plate 36, pull rod 38, driver 58, and connector 60. The electric motor 16 includes a rotor 62 and a stator 64. The driver 58 includes a drive nut 66 and a screw 68. The synchronization assembly 34 includes a synchronization housing 70 and a door 112. Pump module 14 includes a mounting base 40, a handle 42, a cylinder 46, a pipe 48, and a piston assembly 72. The mounting base 40 includes a mounting plate 50, a fluid outlet manifold 52 with an outlet 54, and a mounting journal 56. The fluid outlet manifold 52 includes an inner portion 74 and an outer portion 76. The piston assembly 72 is shown with a drive shaft 44 and a piston cap 78. The piston cap 78 includes a cap body 80, a neck 82, and a head 84.

[0052] Pump assembly 10 is a modular pump assembly because drive module 12 is removable from pump module 14. In some embodiments, drive module 12 is the only part of pump assembly 10 that includes power components (e.g., electrical, pneumatic, hydraulic, etc.), while pump module 14 is the only part of pump assembly 10 that processes or otherwise contacts and / or directly contacts the fluid being pumped and / or entering the cylinder (or other reservoir). As further shown herein, drive module 12 is mounted on pump module 14 such that drive module 12 can be detached and separated from pump module 14. Pump module 14 may remain mounted on cylinder (or other reservoir) before, during, and after installation and / or removal of drive module 12. Pump module 14 may be connected to different drive modules 12, and drive modules 12 may be mounted on and operated on different pump modules 14.

[0053] In the example shown, the motor 16 of drive module 12 is an electric motor. A stator 64 and a rotor 62 are disposed within a motor housing 86. The stator 64 includes armature windings (not shown) and is fixed to the motor housing 86 such that the stator 64 does not rotate about axis PA. The rotor 62 includes a permanent magnet array 88 disposed on the body of the rotor 62 and extending circumferentially around the body of the rotor 62. The rotor 62 is configured to rotate within the motor housing 86 about a motor axis MA (Fig. #) in response to current (e.g., a direct current (DC) signal and / or an alternating current (AC) signal) passing through the stator 64. In the example shown, the motor axis is coaxial with the pump axis PA, such that the rotor 62 rotates on an axis coaxial with the axis of reciprocating motion of the piston assembly 72. The rotor 62 is configured to rotate about the motor axis in response to current passing through the stator 64. Each of the stator 64 and the rotor 62 is coaxial with axis PA, wherein drive module 12 is mounted on pump module 14. Rotor 62 is disposed within stator 64, such that motor 16 comprises an inner rotor. Therefore, permanent magnet array 88 is disposed radially outside the body of rotor 62. However, it is understood that motor 16 can be configured such that rotor 62 is disposed around stator 64 and motor 16 is an outer rotor. In such an example, permanent magnet array 88 is mounted radially inside the body of rotor 62. When drive module 12 is mounted to pump module 14, rotor 62 is configured to rotate about motor axis MA, which is coaxial with axis PA.

[0054] Rotor 62 is connected to motor shaft 90 such that motor shaft 90 rotates together with rotor 62. Motor shaft 90 is coaxial with rotor 62 and extends through the body of rotor 62. Motor shaft 90 is coaxial with drive shaft 44 on axis PA. Motor shaft 90 is coaxial with the reciprocating motion axis of fluid displacement component of pump module (e.g., piston formed by piston assembly 72).

[0055] The motor shaft 90 is connected to the drive shaft 44 via a driver 58. The driver 58 is configured to receive the rotational output from the motor 16 via the motor shaft 90 and convert that rotational output into a linear input to the piston assembly 72. The piston assembly 72 is configured to reciprocate along axis PA due to the linear input from the driver 58. The piston assembly 72 forms the fluid displacement member 18 of the pump module 14. The drive shaft 44 reciprocates axially along axis PA and is coaxial with the motor shaft 90. The rotational axis of the rotor 62 (i.e., the motor axis) and the reciprocating axis of the drive shaft 44 (i.e., the pump axis) are coaxial with each other, such that the motor axis and the pump axis can be considered to be coaxial with a common axis.

[0056] In the illustrated example, a drive nut 66 is connected to a bearing assembly 32 to rotate with the bearing assembly 32. A screw 68 extends through the drive nut 66. The screw 68 extends along and is positioned on the motor axis MA. The screw 68 extends axially through the drive nut 66 and is coaxial with the drive nut 66 on the axis MA. The screw 68 is configured to either translate linearly along the axis PA or rotate about the axis PA. While the screw 68 is generally discussed as translating linearly along the axis PA, it should be understood that in some examples, the screw 68 may rotate on the axis PA without translating along the axis PA. For example, a nut may be connected to the rotating screw 68 and the nut may be synchronized to prevent the nut from rotating about the axis PA, for example, by a synchronization assembly 34. Rotation of the screw 68 causes the nut to translate axially along the axis PA. The nut may be connected to a fluid displacement member in the cylinder 46 to reciprocate along the axis PA.

[0057] A rolling element 114 is radially disposed between the screw 68 and the drive nut 66. The rolling element 114 can have any configuration suitable for linear displacement of the screw 68 caused by rotation of the drive nut 66. For example, the rolling element 114 can be a ball or an elongated roller, among other options.

[0058] Connector 60 is connected to driver 58 for reciprocating motion by driver 58. In the illustrated example, connector 60 is mounted to one end of screw 68 such that connector 60 reciprocates together with screw 68. In the illustrated example, connector 60 engages with the inner wall of synchronization housing 70 to prevent connector 60 from rotating on shaft PA. In the illustrated example, connector 60 includes arm 92 disposed in a recess 94 formed in synchronization housing 70. Arm 92 disposed in recess 94 prevents connector 60 from rotating about axis PA. Keyed interface between connector 60 and synchronization housing 70 prevents screw 68 from rotating about axis PA, thereby causing linear motion of screw 68, which in turn causes linear motion of piston assembly 72. Synchronization assembly 34 also provides anti-pinch protection.

[0059] A support frame 96 is formed at the lower end of the connector 60. A slot 98 is formed in the connector 60. The slot 98 is vertically formed between the body of the connector 60 and the support frame 96. A mounting opening 116 is formed at at least one lateral end of the slot 98. The mounting opening 116 is configured to allow the piston cap 78 to be laterally moved into and out of the slot 98 through the mounting opening 116 to form and disconnect a dynamic interface between the drive module 12 and the pump module 14. A lower opening 118 is formed through the support frame 96 to allow the piston cap 78 to pass through the slot 98.

[0060] In the example shown, connector 60 is detachably connected to piston cap 78. Piston cap 78 is received by slot 98 to connect piston assembly 72 to drive 58. Piston cap 78 can be mounted on drive shaft 44 or otherwise attached to drive shaft 44. Piston cap 78 can be attached to and detached from connector 60 by being received by or detaching from slot 98. When piston cap 78 is received within slot 98, drive shaft 44 will linearly reciprocate with connector 60 and screw 68. Although a slot connection for forming a dynamic connection between drive module 12 and pump module 14 is shown, it should be understood that other types of connections are also possible, such as removable pins extending through holes, and other options.

[0061] A piston cap 78 is disposed at the distal end of drive shaft 44, opposite the fluid-moving portion of piston assembly 72 (e.g., the piston head disposed within cylinder block 46). A cap body 80 is disposed above one end of drive shaft 44 and receives a portion of drive shaft 44 to attach piston cap 78 to drive shaft 44. However, it is understood that in some examples, cap body 80 may include a protrusion received by an orifice of drive shaft 44. Cap body 80 can be connected to drive shaft 44 in any desired manner, whether detachable or permanent. For example, cap body 80 can be connected to drive shaft 44 by engaging threads, forgings, etc. A neck 82 extends from cap body 80 and has a smaller diameter than cap body 80. A head 84 is disposed at the end of neck 82 opposite cap body 80. The diameter of head 84 is larger than that of neck 82. Neck 82 is sized to fit a lateral clearance defined by support bracket 96, such that neck 82 can pass between head 84 disposed within slot 98 and cap body 80 disposed outside slot 98. The neck 82 passes through the lower opening in the connector 60 to connect the head 84 and the cap 80. The head 84 is sized such that the support 96 holds the head 84 within the slot 98.

[0062] The drive module 12 is mounted on and supported by the pump module 14. For example, the entire weight of the drive module 12 can rest on and be supported by the pump module 14. The drive module 12 can be mechanically supported only by the pump module 14, which itself can be entirely supported by the fluid tank 26.

[0063] Pump module 14 includes a mounting base 40 that supports pump module 14 on fluid tank 26. In the illustrated example, mounting base 40 engages with upper plate 36 to support drive module 12. In the illustrated example, mounting base 40 is formed by a plurality of components that support pump module 14 on fluid tank 26 and engage with drive module 12. Specifically, mounting journal 56 is configured to engage and connect with fluid tank 26, and fluid outlet manifold 52 is supported by mounting journal 56. In the illustrated example, mounting journal 56 is integrally formed with and formed on and by the outer portion 76 of fluid outlet manifold 52. Outlet 54 is formed through the outer portion 76 of fluid outlet manifold 52. Inner portion 74 of fluid outlet manifold extends to and engages with outer portion 76. Inner portion 74 can be secured to outer portion 76, for example, by engaging threads, and other options. Drive shaft 44 extends through inner portion 74 and into inner section 28 of fluid tank 26, and engages with a seal supported by inner portion 74. One or both of inner portion 74 and outer portion 76 may engage with portions of drive module 12 to form a static interface between drive module 12 and pump module 14. In the illustrated example, outer portion 76 forms mounting plate 50, which engages with and supports upper plate 36 of drive module 12.

[0064] Mounting plate 50 includes a lower flange 100. The lower flange 100 extends radially away from axis PA. The profile of the lower flange 100 is such that the vertical height of the lower flange 100 decreases as the lower flange 100 extends radially away from axis PA. In the example shown, the upper surface of the lower flange is flush with the upper surface 104 of mounting plate 50.

[0065] Drive module 12 includes an upper plate 36. Upper plate 36 engages mounting plate 50 to support the weight of drive module 12 on pump module 14. Upper plate 36 is attached to a tie rod 38 that also supports motor 16. In the illustrated example, tie rod 38 extends between upper plate 36 and the housing of bearing assembly 32. Upper plate 36 includes an upper flange 102. Upper flange 102 extends radially away from axis PA. The profile of upper flange 102 is such that the vertical height of upper flange 102 decreases as upper flange 102 extends radially away from axis PA. In the illustrated example, the lower surface of upper flange 102 is plane with the lower surface 106 of upper plate 36. In the illustrated example, upper plate 36 is an annulus including a central bore 108 through which piston assembly 72 extends, wherein drive module 12 is mounted to pump module 14.

[0066] The upper surface 104 of the mounting plate 50 engages the lower surface 106 of the upper plate 36 to support the drive module 12 on the pump module 14. In some examples, both the upper surface 104 and the lower surface 106 include planar portions configured to slide relative to each other. In some examples, the upper surface 104 may engage directly with the lower surface 106. Fasteners 120 secure the drive module 12 to the pump module 14 to prevent lateral movement of the drive module 12 away from the pump module 14. For example, fasteners 120 may prevent the drive module 12 from sliding out of the pump module 14. In the illustrated example, the fastener 120 is a clamp. More specifically, the fastener 120 in this embodiment is a disposable clamp. A disposable clamp is a ring that can be tightened around mating upper flange 102 and lower flange 100 (around a hinge) to press the upper plate 36 and the mounting plate 50 together, thereby securing the drive module 12 to the pump module 14.

[0067] Figure 4 This is a partially exploded view of the pump assembly 10, showing a portion of the synchronization housing 70. Specifically, side sections 110 of the synchronization housing 70 are shown. Side sections 110 can form clamshells that, when joined together, form the synchronization housing 70. Side sections 110 can capture portions of the connector 60 between them to form an anti-rotation mechanism for the drive 58. As shown, a door 112 is connected to the drive module 12. Door 112 is configured to be in a closed state (in... Figure 5 and Figure 6 (best visible in) and open state (in) Figure 7A and Figure 7B The door 112 is configured to pivot between a closed state and an open state. In the example shown, the door 112 is mounted to a side segment 110 of the synchronization housing 70. Specifically, the door 112 can be pivotally clamped between the side segments 110 of the synchronization housing 70.

[0068] As explained in more detail below, when door 112 is in the open position, drive module 12 can be laterally displaced relative to the reciprocating axis PA of piston assembly 72, and thus laterally moved relative to motor axis MA, to install and remove drive module 12 from pump module 14. In the illustrated example, a portion of upper flange 102 is formed by door 112. Therefore, fastener 120 can engage with door 112 to hold door 112 in the closed position. Door 112 can define at least a portion of upper plate 36 such that upper plate 36 is a complete ring when door 112 is in the closed position and a broken ring when door 112 is in the open position. When door 112 is in the open position, a gap is created in upper plate 36 through which drive shaft 44 can laterally pass during installation and removal of drive module 12. The synchronization assembly 34, including the two side sections 110 and the door 112, can remain mounted to the drive module when the drive module 12 is mounted to the pump module 14 and when the drive module 12 is removed from the pump module 14.

[0069] Figures 5-9 The process of removing the drive module 12 from the pump module 14 is shown. Figure 5 It is an isometric view of the drive module 12, which is installed on and supported by the pump module 14. Figure 5 This shows the state of pump assembly 10 during pumping. Fastener 120 is in a fixed position to secure drive module 12 to pump module 14. Door 112 is in a closed position and is held closed by fastener 120 that engages with a portion of door 112.

[0070] Figure 6 This is an isometric view of the pump assembly 10, showing the removal of the fastener 120. In the case of a disposable clamp, the threaded member can be turned by a knob to reduce tension, thereby allowing the annular fastener 120 to swing open as two hinged semicircular portions. During installation, the threaded member can be turned to increase tension to keep the fastener 120 closed and secure the drive module 12 to the pump module 14. Figure 6 As shown, fastener 120 is not secured and has been removed from pump assembly 10.

[0071] Figure 7A This is a first isometric view of the pump assembly 10, showing that the fastener 120 has been removed and the door 112 is in the open position. Figure 7BThis is a second isometric view of the pump assembly 10, showing fastener 120 removed and door 112 in the open position. Door 112 is pivotable between a closed and an open position. As shown, door 112 is pivotable upwards. Door 112 is hinged between side sections 110 of the synchronization housing 70. The pivoting of door 112 exposes connector 60 and piston cap 78 within the synchronization housing 70 through door opening 122. Door opening 122 is formed by removing door 112 from between the side sections 110 forming the synchronization housing 70. Door opening 122 includes a gap in the annulus of upper plate 36. In the illustrated example, door opening 122 is defined not only by the gap in the synchronization housing 70 but also by the gap in upper plate 36. Door opening 122 facilitates lateral movement of drive module 12 between installation to and removal from pump module 14.

[0072] Figure 8 This is an isometric view of pump assembly 10, in which drive module 12 slides laterally relative to pump module 14. Specifically, the lower surface 106 of upper plate 36 slides relative to the upper surface of mounting plate 50. The sliding direction causes head 84 to move out of slot 98 of connector 60 and piston assembly 72 to move through opening 122. With door 112 in the open position, drive module 12 can slide along mounting plate 50 to disconnect the dynamic interface connection and the static interface connection. The dynamic and static connections can be disconnected by a single movement of drive module 12 relative to pump module 14. In some examples, the dynamic and static connections can be disconnected simultaneously.

[0073] Figure 9 This is an isometric view of pump assembly 10, with drive module 12 completely disengaged from pump module 14. Piston assembly 72 has slid out of door opening 122, including head 84 sliding out of slot 98 in connector 60. When disengaged, drive module 12 can be used with a different pump module 14 and / or a different drive module 12 can be used with pump module 14. Furthermore, cleaning pump module 14 is easier after all components of drive module 12 have been removed. For example, removing drive module 12 removes all electrical components, allowing pump module 14 to be sprayed or otherwise cleaned without concern about water or other cleaning solutions coming into contact with the electrical components.

[0074] It should be understood that during the installation and removal of the drive module 12, the pump module 14 can be mounted to and at least partially supported by the fluid tank 26, as described above. Therefore, during the assembly and removal of the pump assembly 10, the user only needs to manipulate and operate the drive module 12. The user does not need to position, support, manipulate, or otherwise interact with the pump module 14 during the installation and removal of the drive module 12.

[0075] Driver module 12 can be referenced Figures 5-9The reverse steps described are then installed onto pump assembly 10. Drive module 12 is initially in... Figure 5 The state shown is in which the drive module 12 is completely removed from the pump module 14. The drive module 12 is positioned relative to the pump module 14 such that the piston assembly 72 is aligned with the door opening 122.

[0076] like Figure 8 As shown, the drive module 12 is displaced onto the pump module 14, for example, by sliding the upper plate 36 along the mounting plate 50. More specifically, the lower surface 106 slides along the upper surface 104. The portion of the lower surface 106 that contacts the upper surface 104 may be planar, and the portion of the upper surface 104 that contacts the lower surface 106 may be planar. The piston assembly 72 is displaced through the door opening 122. The drive module 12 continues to be displaced laterally in a direction orthogonal to the reciprocating axis PA of the pump module 14. In the example shown, the drive module 12 is displaced laterally to the axis of rotation of the motor 16. More specifically, the drive module 12 may be displaced vertically to the axis of rotation of the motor 16.

[0077] The drive module 12 is shifted relative to the pump module 14, so that the head 84 of the piston cap 78 is received in the slot 98 of the connector 60, as... Figure 7A and 7B As shown. The piston cap 78, which engages with connector 60, forms a dynamic connection between drive module 12 and pump module 14. In some examples, a locking interface 124 (in) between drive module 12 and pump module 14 Figure 12A and Figure 12B (Best visible) A static interface 124 is locked between the upper plate 36 and the mounting plate 50, as discussed in more detail below. For example, the locking interface 124 may be formed by a protrusion formed on one of the drive module 12 and the pump module 14, which engages with a receiver formed on the other of the drive module 12 and the pump module 14. When the locking interface 124 is engaged, it prevents the drive module 12 from vertically displacing relative to the pump module 14. In some examples, the locking interface 124 prevents the drive module 12 from vertically displacing relative to the pump module 14 until the dynamic interface between the connector 60 and the pump connector 60 is disconnected.

[0078] like Figure 6 As shown, door 112 transitions from an open state to a closed state. Fasteners 120 are installed around the upper flange 102 and the lower flange 100 and secure the drive module 12 to the pump module 14. The pump assembly 10 is thus assembled and secured together for operation.

[0079] Figure 9 The upper surface 104 of the mounting plate 50 is further shown. (As shown) Figure 9As shown, protrusion 126 extends vertically from mounting plate 50. Protrusion 126 protrudes vertically above the upper surface 104 of mounting plate 50. In the illustrated example, the upper surface 104 is formed as an annulus centered on the reciprocating axis PA of piston assembly 72. The upper surface 104 may be planar between its outer radial edge and protrusion 126. Protrusion 126 may be centered on the reciprocating axis PA of piston assembly 72. Both protrusion 126 and upper surface 104 may be centered on the pump axis PA. In some examples, protrusion 126 and upper surface 104 are formed as concentric circles. Protrusion 126 can be used to engage and guide the sliding movement of drive module 12 relative to pump module 14.

[0080] Figure 10 This is an isometric view of the drive module 12 from its bottom side. The lower surface 106 of the upper plate 36... Figure 10 The upper plate 36 is best visible and can engage with and slide along the upper surface 104 of the mounting plate 50. The laterally inner side of the upper surface 104 is a recess 128 in the upper plate 36. The recess 128 is formed relative to the upper surface 104. The recess 128 includes an arcuate profile in the upper surface 104 that helps guide the drive module 12 onto the pump module 14 and can form a stop for further sliding of the drive module 12 relative to the pump module 14. In some examples, the recess 128 is U-shaped. The legs of the arcuate recess 128 can guide the drive module 12, and the base of the arcuate recess 128 can prevent lateral movement of the drive module 12. The recess 128 is partially defined by the upper surface 104 and extends to the outer radial edge of the upper plate 36. In some examples, the bottom surface of the door 112 is planar with the upper surface 104. In some examples, the bottom surface of the door 112 is planar with the recess 128.

[0081] The recess 128 is arc-shaped, and in some examples U-shaped, and includes only one opening to form an inlet / outlet for sliding disengagement, as the protrusion 126 can only slide out from one opening area. Note that the drive module 12 typically cannot be lifted off the pump module 14 because the head 84 is wider than the lower opening 118 of the slot 98 through the connector 60, such that the pump module 14 will allow the drive module 12 to slide out of the pump module 14 in a specific direction, causing the head 84 to disengage from the slot 98 and thus removing the protrusion 126 from the recess 128. In the illustrated example, the sliding direction that disengages the head 84 from the slot 98 is transverse to the reciprocating axis PA of the piston assembly 72 and the rotation axis of the motor 16.

[0082] like Figure 3B and Figure 3CAs best seen, protrusion 126 and upper plate 36 limit the lateral movement of drive module 12 relative to pump module 14 during installation. Protrusion 126 can project further vertically away from upper surface 104 than recess 128 extends vertically away from lower surface 104. In some examples, the door opening 122 is sized such that protrusion 126 can pass through it, while drive module 12 is purely laterally displaced. In some examples, pump assembly 10 is configured such that protrusion 126 is wider than opening 122. In any example, the lateral displacement of drive module 12 relative to pump module 14 engages the dynamic connection during installation and disengages the dynamic connection during removal.

[0083] In the example where the protrusion 126 is wider than the opening 122, during installation, the door 112 is in the open position and the drive module 12 is displaced to align the piston assembly 72 with the opening 122. The drive module 12 may be tilted such that the motor axis (e.g., the rotational axis of the motor 16 or the reciprocating axis of the pneumatic drive element) is transverse to the reciprocating axis of the piston assembly 72. The drive module 12 is displaced laterally and the recess 128 moves over the protrusion 126. The drive module 12 is further displaced laterally until the protrusion 126 is positioned in the central bore 108. The protrusion 126 entering the central bore 108 allows the drive module 12 to be positioned on the pump module 14. The drive module 12 is further displaced to engage the piston cap 78 with the connector 60, and in some examples, engages the locking interface 124 between the drive module 12 and the pump module 14.

[0084] When mounted on pump module 14, drive module 12 can rotate about pump axis PA while being fully supported by pump module 14, provided fastener 120 is not engaged. Thus, drive module 12 can be mounted on pump module 14 in a first orientation. Drive module 12 can slide onto pump module 14 in the first orientation. Drive module 12 can rotate relative to pump module 14 while connected to the dynamic interface and supported by pump module 14. Drive module 12 can be rotated from a first orientation for installation and removal to a second orientation used during operation. Fastener 120 can engage to prevent relative rotation between drive module 12 and pump module 14. Drive module 12 can be mounted from any orientation and then rotated to the operating orientation. For example, fluid tank 26 may be arranged in a confined space, limiting access options for drive module 12 to pump module 14. Such confined areas may require installation from orientations inaccessible or inconveniently accessible to drive module 12's controller, wiring, or connections (e.g., electrical, pneumatic, hydraulic, etc.). When mounted on pump module 14, rotary drive module 12 allows drive module 12 to be easily installed and removed, and then placed in the desired operating position where controls or other connections are accessible.

[0085] The interface between the drive module 12 and the pump module 14 offers significant advantages. The pump module 14 can be mounted in the cylinder in any orientation, and the drive module 12 can then be mounted on the pump module 14 in any orientation around the pump axis PA (360 degrees). While the pump module 14 can be accessed from any direction, the drive module 12 can slide onto and off the pump module 14 in only one direction, aligning the head 84 of the piston cap 78 with the slot 98 of the connector 60. When the drive module 12 is mounted to and supported by the pump module 14, the drive module 12 can rotate between the mounting / removal orientation and the operating orientation. The pump assembly 10 can be used in confined spaces, such as construction sites, work sites, trailers, processing plants, etc. The user can access the pump module 14 from any orientation around the pump module 14 (360 degrees) to mount the drive module 12. The drive module 12 can then be rotated to the desired operating position, which is likely most convenient for connecting power to the drive module 12 (e.g., power cord, pneumatic line, hydraulic line, etc.). The drive module 12 can then be fixed in the operating position, for example, by fastener 120, and the pump assembly 10 can be operated. The drive module 12 can be easily removed by rotating it from the operating position to the disassembly position and then laterally shifting it.

[0086] Figure 11 This is an isometric view of a portion of pump module 14. The mounting base 40, piston assembly 72, and pipe 48 of pump module 14 are shown. The mounting plate 50, fluid outlet manifold 52, and mounting journal 56 of mounting base 40 are shown. The piston cap 78 and drive shaft 44 of piston assembly 72 are shown. Piston cap 78 includes cap body 80, neck 82, and head 84. Mounting plate 50 includes upper surface 104, protrusion 126, and receiver 130. Protrusion 126 includes retaining flange 132.

[0087] Mounting plate 50 is configured to form a static support component for pump module 14, similar to static support component 24b. Figure 1 Mounting plate 50 is formed on mounting base 40. More specifically, mounting plate 50 is formed by fluid outlet manifold 52. Although fluid outlet manifold 52 is shown as forming mounting plate 50, it should be understood that mounting plate 50 may be formed wholly or partially by components other than fluid outlet manifold 52. It should be understood that the static support components of pump module 14 may be formed by a single component or multiple component parts assembled together.

[0088] In the illustrated example, mounting plate 50 includes an upper surface 104 and a protrusion 126. The upper surface 104 is configured to engage a portion of the drive module 12 to support the entire weight of the drive module 12. For example, the upper surface 104 may engage the lower surface 106 of the upper plate 36. In the illustrated example, the upper surface 104 forms a planar loop extending around the protrusion 126 and centered on the pump axis PA. The protrusion 126 extends vertically relative to the flat upper surface 104. The protrusion 126 may be cylindrical, and the drive shaft 44 extends through the protrusion 126 out of the interior of the pump module 14. The protrusion 126 may be centered on the pump axis PA.

[0089] Receiver 130 is configured to form part of a locking interface 124 between pump module 14 and drive module 12 (in Figure 12A and Figure 12B (Best seen in the image). In the example shown, receiver 130 is formed by protrusion 126. More specifically, receiver 130 is formed by retaining flange 132 extending laterally from protrusion 126. In some examples, retaining flange 132 may be formed as an annular flange extending completely around protrusion 126 and pump axis PA. Thus, retaining flange 132 may extend a full 360 degrees around pump axis PA.

[0090] The retaining flange 132 is an overhang extending laterally away from the protrusion 126, defining a gap 134. The gap 134 is vertically formed between the flat upper surface 104 and the retaining flange 132. As discussed in more detail below, the gap 134 is configured to receive a portion of the drive module 12 to secure the drive module 12 to the pump module 14. Because a portion of the drive module 12 is disposed in the gap 134, the drive module 12 cannot be vertically lifted away from the pump module 14, but must instead be laterally displaced relative to the piston assembly 72 and the pump shaft axis PA to remove that portion of the drive module 12 from the gap 134 before vertical displacement. The receiver 130 thus prevents vertical movement of the drive module 12 relative to the pump module 14.

[0091] Figure 12A It is along Figure 12B The enlarged cross-sectional view of a portion of the pump assembly 10, taken by line AA, shows the static and dynamic interfaces between the drive module 12 and the pump module 14. Figure 12B It is along Figure 12A The enlarged cross-sectional view of a portion of pump assembly 10, taken by line BB, shows the static and dynamic interfaces between drive module 12 and pump module 14. These will be discussed together. Figure 12A and Figure 12B The mounting base 40 of the pump module 14 and the piston assembly 72 are shown. The upper plate 36 and connector 60 of the drive module 12 are shown.

[0092] Mounting plate 50 is formed from a portion of mounting base 40. More specifically, in the illustrated example, mounting plate 50 is formed from a portion of fluid outlet manifold 52. Upper surface 104 is formed on outer portion 76 and protrusion 126 is formed by inner portion 74. Inner portion 74 extends through a hole in outer portion 76. Inner portion 74 can be secured to outer portion 76, for example, by interface threads at the end of inner portion 74 opposite to protrusion 126. Inner portion 74 and outer portion 76 can define a fluid chamber therebetween, which forms part of the flow path between cylinder 46 and outlet 54.

[0093] A locking interface 124 is formed between the receiver 130 of the pump module 14 and the lip 136 of the drive module 12. The locking interface 124 engages between the drive module 12 and the pump module 14, on which the drive module 12 is mounted. The locking interface 124 allows the drive module 12 to slide laterally relative to the pump module 14, but prevents the drive module 12 from being vertically displaced relative to the pump module 14. Therefore, with the locking interface 124 engaged, the drive module 12 can be laterally displaced relative to the pump module 14 and the pump axis PA, but the drive module 12 cannot be vertically lifted away from the pump module 14.

[0094] The receiver 130 is formed by a retaining flange 132 extending from the protrusion 126. The retaining flange 132 extends radially relative to the protrusion 126. In the illustrated example, the retaining flange 132 extends from the upper end of the protrusion 126. In some examples, the retaining flange 132 extends completely around the protrusion 126, such that the retaining flange 132 is an annular flange. For example, the retaining flange 132 may extend a full 360 degrees around the protrusion 126. In other examples, the retaining flange extends less than 360 degrees or is formed by multiple arcuate flange segments extending from the protrusion 126. The retaining flange 132 extending completely around the protrusion 126, whether as a single flange or as multiple flange segments, facilitates mounting the drive module 12 to the pump module 14 from any desired orientation around the reciprocating axis PA of the piston assembly 72. Thus, the retaining flange 132 can engage with the lip 136 regardless of the orientation of the drive module 12 mounted on the pump module 14.

[0095] A receiving gap 134 is vertically formed between the upper surface 104 and the retaining flange 132. In the illustrated example, both the lower and upper edges defining the receiving gap 134 are formed by the inner portion 74. However, it should be understood that the receiving gap 134 can be defined between different components, for example, between the upper edge formed by the inner portion 74 and the lower edge formed by the outer portion 76. In some examples, the protrusion 126, the retaining flange 132, and the upper surface 104 can be integrally formed as a single component.

[0096] The lip 136 is formed by the upper plate 36. In the illustrated example, the lip 136 is integrally formed with the upper plate 36. However, it will be understood that the lip 136 can be formed in any desired manner. As shown, the upper plate 36 engages the receiver 130 to form a locking interface 124. More specifically, the lip 136 of the upper plate 36 extends into a receiving gap 134 defined at least partially by a retaining flange 132. The receiving gap 134 is aligned with the upper surface 104 of the mounting plate 50 (e.g., the lower edge of the receiving gap 134 is flush with the upper surface 104), allowing the upper plate 36 to slide along the upper surface 104 until the lip 136 extends into the receiving gap 134 to engage the locking interface 124. This engagement of the lip 136 within the retaining gap 134 restricts movement between the drive module 12 and the pump module 14. Specifically, engagement prevents the drive module 12 from being vertically lifted away from the pump module 14 without first sliding the drive module 12 laterally relative to the pump module 14 to disengage the lip 136 from the receiving gap 134. A retaining flange 132 is formed as an overhang extending above and engaging with the lip 136 to prevent relative vertical movement of the drive module 12.

[0097] In the illustrated example, drive module 12 includes a receiver (e.g., retaining flange 132) and pump module 14 includes an insert (e.g., lip 136). However, it is understood that the receiver and insert can be reversed. For example, lip 136 can be formed as part of pump module 14 and receiver 130 can be formed as part of drive module 12. Alternatively, drive module 12 and pump module 14 can include different structures for preventing drive module 12 from lifting away from pump module 14 without first sliding relative to pump module 14.

[0098] The flange 132 extends from the protrusion 126 and can be annular, extending completely around the drive shaft 44. The head 84 of the piston cap 78 can also have a circular cross-sectional profile 360 ​​degrees around the pump axis PA. However, it is understood that the head 84 can be sized to rotate within the slot 98 without having a circular cross-sectional profile. In this way, because the head 84 is circular with the protrusion 126, the drive module 12 can be approached and slid onto the pump module 14 from any direction, which is convenient when the reservoir 26 is stored in a confined space and cannot be accessed from any direction by the user. In this way, the pump module 14 can be mounted in any orientation within the cylinder, and the drive module 12 can then be mounted on the pump module in any direction 360 degrees around the pump axis PA. While the pump module 14 can be approached from any direction, the drive module 12 can slide open and close in only one direction, aligning the head 84 of the piston cap 78 with the slot 98 of the connector 60. Furthermore, while the retaining flange 132 prevents the vertical lifting of the drive module 12, it does not impede the radial movement of the drive module 12 relative to the pump axis PA or the circumferential movement of the drive module 12 about the pump axis PA. Therefore, even when the locking interface 124 is engaged, the drive module 12 can rotate about the pump axis PA to the desired operating position.

[0099] Figure 13A This is an isometric view of pump assembly 10. Figure 13B This is a cross-sectional view of pump assembly 10. Figure 13C This is an isometric view of pump assembly 10, showing the lateral displacement of drive module 12' relative to pump module 14. (To be discussed together.) Figures 13A-13C Except that the motor 16' of drive module 12' is a pneumatic actuator instead of an electric motor as shown in the previous example, pump assembly 10 is substantially similar to the pump assembly previously shown. Pneumatic motor 16' can be supplied with pressurized air, which powers its operation to output reciprocating motion to pump module 12'. Pneumatic motor 16' includes a motor shaft 90 that is linearly moved along pump axis PA to move piston assembly 72. Shaft head 138 is disposed within motor housing 86' and divides motor housing 86' into two chambers, which are alternately pressurized to cause operation of pneumatic motor 16'. Motor shaft 90 moves downward by releasing pressurized air in the upper chamber of pneumatic actuator 16' until a travel actuation valve is reached, which expels air from the upper chamber and introduces pressurized air into the lower chamber, which reverses the reciprocating motion to the upward direction. Sufficient upward travel actuates the valve again to expel air from the lower chamber and introduce pressurized air into the upper chamber, thus outputting reciprocating motion. Motor shaft 90 is connected to piston assembly 72 via connector 60. Connector 60 may be similar to the connector 60 shown previously.

[0100] Because the pneumatic motor 16' outputs linear reciprocating motion via the motor shaft 90 instead of rotary motion like the electric motor 16, the drive module 12' does not require a synchronization component 34. In the example shown, the spring 140 ( Figure 13C As shown, a cylindrical chamber extends vertically between the motor housing 86' and the upper plate 36, defining the interface between the connector 60 and the piston cap 78, which is disposed within and reciprocates. A spring 140 provides anti-pinch protection. The drive module 12' is configured to slide laterally relative to the pump module 14 during at least a portion of the installation and removal process. Specifically, the lower surface 106 of the upper plate 36 can slide along the upper surface 104 of the mounting plate 50, disengaging the lip 136 from the receiver 130. Once the lip 136 is fully disengaged from the receiver 130 (e.g., removed from below the retaining flange 132), the drive module 12' can be lifted away from the pump module 14.

[0101] The drive module 12' is attached to the pump module 14 via fastener 120. The pump module 14 may be the same as the pump module 14 of the foregoing embodiments and / or may have features similar to any of the foregoing embodiments. The disclosed mounting configuration and arrangement facilitates the mounting of different drive modules with different power types on a single pump module 14.

[0102] Figure 14 This is an enlarged isometric view showing the interface between drive module 12' and pump module 14. Fastener 120 is not shown in this view so that upper flange 102 and lower flange 100 can be clearly shown. Anti-pinch devices (e.g., spring 140) are also not shown to clearly show the dynamic connection interface between connector 60 and piston assembly 72.

[0103] The drive module 12' includes a top plate 36, while the pump module 14 includes a mounting base 40. Figure 14 The head 84 of the piston cap 78 is shown, engaging in the slot 98 of the connector 60. The upper plate 36 includes a slot 142 aligned with the drive shaft 44. The slot 142 is aligned with the drive shaft 44 such that laterally pulling the drive module 12' to disengage the locking interface 124 between the drive module 12' and the pump module 14 causes the drive shaft 44 to enter the slot 142. The slot 142 restricts lateral displacement of the drive module 12' during disassembly. The slot 142 engaging the drive shaft 44 prevents further lateral movement of the drive module 12' relative to the pump module 14. The slot 142 engaging the drive shaft 44 provides feedback to the user that the locking interface 124 has disengaged, allowing the drive module 12' to be vertically lifted away from and away from the pump module 14.

[0104] In the example shown, the upper plate 36 extends entirely around the pump axis PA and the drive shaft 44. The upper plate 36 does not include openings or doors, similar to opening 122 and door 112, to allow the drive module 12' to be vertically displaced during a portion of the installation and removal process. However, it is understood that the drive module 12' can be configured to have door 112, regardless of the configuration of the electric motor. For example, the drive module 12' may include door 112 regardless of whether the electric motor is a pneumatic motor, an electric motor, or a hydraulic motor. It should also be understood that the drive module 12' is laterally displaced relative to the pump module 14 to engage and disengage the dynamic connection between the drive module 12' and the pump module 14, regardless of whether the installation process includes any vertical displacement of the drive module 12' relative to the pump module 14.

[0105] Figure 15A This is the first isometric view of the drive module 12'. Figure 15B This is the second isometric view of the drive module 12'. Figure 15C This is the third isometric view of the drive module 12'. We will discuss this together. Figures 15A-15C The drive module 12' is shown as being detached from the pump module 12. The lower surface 106 of the upper plate 36 is shown. A lip 136 may be partially formed by the lower surface 106. A side view of the arcuate shape of the lip 136 is shown. As shown, the lip 136 is U-shaped, but other shapes are also possible. The arcuate shape of the lip 136 includes an open side (e.g., the portion between the two ends of the lip 136), which determines the direction in which the drive module 12' must slide into (and out of) the pump module. Specifically, the drive module 12' then slides to move the pump axis PA into the area defined by the arcuate lip 136 to engage the lip 136 with the receiver 130, and the drive module 12' slides to move the pump axis PA out of the area defined by the arcuate lip 136 to disengage the lip 136 from the receiver 130. The lip 136 extends only partially around the pump axis PA. In some examples, the lip 136 extends up to 180 degrees around the pump axis PA; however, it should be understood that not all examples are so restricted.

[0106] A recess 128 in the lower surface 106 partially defines the lip 136. The recess 128 is a recess extending vertically from the lower surface 106 into the upper plate 36. The recess 128 facilitates the installation and removal of the drive module 12' from the pump module 12. As previously mentioned, the upper plate 36 does not include a door in the illustrated example. Therefore, the drive module 12' needs to move at least partially vertically during installation and removal. The recess 128, and in some examples, the notch 142, facilitates the vertical movement of the drive module 12'. For example, the drive module 12' can tilt to a point on the upper flange 102 on the side of the motor axis opposite to the notch 142 and move laterally toward the pump module 12. The drive module 12' can then pivot downwards onto the pump module 12. The piston cap 78 can pass within the recess 128 when the drive module 12' pivots downwards during installation or upwards during removal. Therefore, it may not be necessary for the user to fully lift the drive module 12' during installation and removal. The recess 128 also provides space for the protrusion 126 during installation and removal. The recess 128 thus allows the drive module 12' to slide laterally to engage and disengage the locking interface 124 (in... Figure 12A and Figure 12B (Best visible in the middle).

[0107] When mounted on pump module 12, drive module 12' can rotate about pump axis PA, while pump module 12 remains mounted on the cylinder if fastener 120 is not engaged. Therefore, drive module 12' can be mounted on pump module 12 by sliding from a first position and then rotating relative to pump module 12 to a second position for pumping. Drive module 12' can be removed from pump module 12 by rotating from the second position to the first position and then disengaging from locking interface 124. Fastener 120 engages to prevent relative rotation between drive module 12' and pump module 12 when drive module 12' is in the desired pumping position.

[0108] exist Figures 14-15C In the example shown, the drive module 12' is vertically and laterally displaced relative to the pump module 12 during installation and removal. During installation, at least a portion of the drive module 12' is vertically raised above the piston assembly 72 to allow the piston assembly 72 to enter the central hole 108 defined by the upper plate 36. The drive module 12' is then vertically displaced so that the upper plate 36 engages with and is supported by the mounting plate 50. A protrusion 126 is at least partially disposed within a recess 128. The head 84 of the piston cap 78 is aligned with a slot 98 of the connector 60. The drive module 12' is laterally moved so that the head 84 enters the slot 98 and causes a lip 136 to enter the recess 128. The head 84 entering the slot 98 forms a dynamic connection interface, and the lip 136 entering the recess 128 locks a static connection interface.

[0109] The drive module 12' can be removed from the pump module 12 in the reverse order of the installation process. The drive module 12' is initially displaced laterally relative to the pump module 12 to remove the head 84 from the slot 98 and the lip 136 from the recess 128. The drive module 12' can then be lifted vertically away from the pump module 12.

[0110] Figure 16A This is an isometric view of the pump assembly 10' installed in the fluid tank 26. Figure 16B It is along Figure 16A The section view of the pump assembly 10' is taken from line BB and the motor housing 86' is removed. Figure 16C This is an exploded view of the pump assembly 10' at equal intervals. Figure 16D This is an enlarged isometric view of the interface between drive module 12'' and pump module 14''. They will be discussed together. Figures 16A-16D The drive module 12'' and pump module 14' of pump assembly 10' are shown. The drive module 12'' includes an electric motor 16, a driver 58', a drive module support 144, a door 112, and a connector 60. The driver 58' includes a crank 146 with an eccentric element 148 and an arm 150. The drive module support 144 defines a drive chamber 152 and includes a column 154. Pump module 14' includes a mounting base 40' and a piston assembly 72. The mounting base 40' includes a receiver 130' and a bracket interface 156.

[0111] Pump assembly 10' and pump assembly 10 (in Figure 3A In a substantially similar manner (best visible in the image), pump assembly 10' includes a drive module 12'' which is structurally supported and disposed on pump module 14'. Pump module 14' can fully support drive module 12'' relative to fluid tank 26. Pump module 14' itself is supported by fluid tank 26 relative to the ground. In the illustrated example, bracket 158 ​​is connected to pump assembly 10' to support and stabilize pump assembly 10'. Bracket 158 ​​is directly connected to pump module 14'. Bracket 158 ​​is connected to mounting base 40' at bracket interface 156, which is a protrusion extending from mounting base 40'. In the illustrated example, bracket 158 ​​is at least partially disposed outside fluid tank 26, while cylinder 46 is disposed inside fluid tank 26. Bracket 158 ​​contacts fluid tank 26 at bracket 160 to support pump module 14' on fluid tank 26. Pump module 14' can be independently supported on fluid tank 26 in this manner. Although the bracket 158 ​​is described as being in contact with the ground, it should be understood that some examples of the pump assembly 10' can be fully supported by the fluid tank 26 without another component being in contact with the ground.

[0112] Piston assembly 72 extends from the outside of mounting base 40', passes through mounting base 40', and enters cylinder 46. When pump module 14' is mounted to fluid tank 26, cylinder 46 can be in direct contact with the material being pumped. Cylinder 46 is connected to mounting base 40'. Check valves 162a and 162b are provided at the end of pump assembly 10' opposite piston cap 78. Check valve 162a is a static check valve, located in a set position along pump axis PA during the reciprocating motion of piston assembly 72. Check valve 162b is connected to piston assembly 72 to reciprocate with piston assembly 72. In the illustrated example, pump module 14' includes a dual-displacement pump that can output fluid during upstroke and downstroke.

[0113] Drive module 12'' is mountable to and detachable from pump module 14'. Drive module 12'' is supported by pump module 14'. Drive module 12'' is configured to power pump module 14' to cause reciprocating motion of piston assembly 72 and thus be pumped by pump module 14'. Electric motor 16 is supported by drive module support 144. Electric motor housing 86'' surrounds electric motor 16. Electric motor 16 is an electric motor in the illustrated example, but it should be understood that electric motor 16 can have any desired configuration suitable for powering pump module 14', such as pneumatic motor, hydraulic motor, etc. In the illustrated example, battery 166 is supported by electric motor housing 86'' and configured to power electric motor 16. Electric motor 16 is operatively connected to driver 58'. Driver 58' is configured to convert the rotational output from electric motor 16 into a linear reciprocating input to piston assembly 72. In the illustrated example, gear assembly 164 is disposed between and connects electric motor 16 and driver 58'. Gear 164 is configured to reduce speed and increase torque output from motor 16 to driver 58'. However, it should be understood that not all examples include gear 164 such that motor 16 can be directly connected to driver 58'.

[0114] The driver 58' includes an eccentric wheel 148 configured to be rotated by a motor 16. An arm 150 extends between the eccentric wheel 148 and the connector 60. The eccentric wheel 148 and the arm 150 convert the rotational output from the motor 16 into a linear reciprocating input to the connector 60, causing the connector 60 to reciprocate along the pump axis PA, thereby causing the piston assembly 72 to reciprocate along the pump axis PA.

[0115] In the illustrated example, drive module support 144 engages with mounting base 40' to form a static connection between drive module 12'' and pump module 14'. A locking interface 124 is formed between drive module 12'' and pump module 14' to prevent vertical displacement of drive module 12'' relative to pump module when locking interface 124 is engaged. In the illustrated example, the locking interface is formed by a post 154 engaging receiver 130'. Post 154 extends from drive module support 144 to form a static interface component of drive module 12''. Receiver 130' forms a static interface component of pump module 14'. Post 154 extends into a bore of receiver 130' to mount drive module 12'' to pump module 14'. Post 154 is configured to slide within the bore of receiver 130' during installation and removal of drive module 12''. In the illustrated example, post 154 can pass through receiver 130' and enter receiver 130' from either end of the bore. The drive module 12'' can therefore be mounted to the pump module 14' in multiple orientations. The post 154 of the engagement receiver 130' can both structurally support the drive module 12'' onto the pump module 14' and form a locking interface 124 between the drive module 12'' and the pump module 14'.

[0116] The drive cavity 152 is at least partially defined by the drive module support 144. A door 112 is connected to the drive module support 144. The door 112 is configured to pivot between an open state and a closed state, exposing the drive cavity 152 in the open state to allow the piston cap 78 to enter or exit the drive cavity 152, and closing the drive cavity 152 and preventing the piston cap 78 from entering or leaving the drive cavity 152 in the closed state. A connector 60 is at least partially disposed in the drive cavity 152. The connector 60 is a dynamic interface component of the drive module 12'' and is configured to reciprocate the piston assembly 72 to induce pumping by the pump module 14'. A slot 98 is formed in the connector 60 and configured to receive the head 84 of the piston cap 78. The interface between the connector 60 and the piston cap 78 forms a dynamic interface between the drive module 12'' and the pump module 14'.

[0117] In the example shown, the motor axis MA is oriented transversely to the pump axis PA, with drive module 12'' mounted to pump module 14'. In the example shown, the motor axis MA is configured to be orthogonal to the pump axis PA. During installation and removal, drive module 12'' can be axially displaced relative to the motor axis MA and laterally displaced relative to the pump axis PA. The lateral displacement of drive module 12'' can be in a direction orthogonal to the pump axis PA.

[0118] During installation, drive module 12'' is oriented relative to pump module 14' to align post 154 with receiver 130' and piston cap 78 with connector 60. Drive module 12'' is laterally displaced relative to pump axis PA and toward pump module 14'. Post 154 enters the bore of receiver 130'. Drive module support 144 thus contacts mounting base 40' and can slide relative to mounting base 40' at the contact point. Lateral displacement of drive module 12'' allows post 154 to fully enter receiver 130' and head 84 to enter slot 98. Door 112 can pivot to a closed position to secure the static connection and prevent drive module 12'' from being laterally pulled away from pump module 14'. For example, door 112 can engage a portion of mounting base 40' to prevent relative lateral movement between drive module 12'' and pump module 14' when door 112 is closed. Door 112 also provides anti-pinch protection. In the example shown, the drive module 12'' can be mounted in two orientations relative to the pump module 14'. The column 154 can enter the receiver 130' from either end of the receiver 130'.

[0119] Drive module 12'' can be removed from pump module 14' in the reverse of the installation process. Door 112 is positioned in the open state to expose drive chamber 152 and allow drive module 12'' to move laterally relative to pump module 14' and pump axis PA. Lateral displacement of drive module 12'' relative to pump module 14' disconnects the dynamic interface between connector 60 and piston cap 78 by removing head 84 from slot 98. Lateral displacement of drive module 12'' relative to pump module 14' disconnects locking interface 124 between post 154 and receiver 130'. In some examples, drive module 12'' and pump module 14' are sized such that the dynamic interface forms after the static interface during installation and disconnects before the static interface during removal. This relative dimensionaling prevents unwanted eccentric forces from being applied to piston assembly 72 during installation and removal. The static interface ensures linear sliding motion as the dynamic interface forms and disconnects. In this way, when the head 84 is in the slot 98, the static interface prevents the drive module 12'' from shifting vertically or tilting relative to the pump module 14'.

[0120] Figure 17A This is an exploded perspective view of pump assembly 10'', showing drive module 12''' removed from pump module 14''. Figure 17BThis is a cross-sectional view of pump assembly 10'', with drive module 12''' mounted on pump module 14''. The drive module 12'''''s motor 16, driver 58', drive module support 144', door 112, and connector 60 are shown. Driver 58' includes a crank 146 with an eccentric member 148 and an arm 150. Drive module support 144' includes a drive chamber 152 and a mounting bracket 170. Pump module 14'' includes a mounting base 40'' and a piston assembly 72. Mounting base 40'' includes a fluid outlet manifold 52, a bracket interface 156, and an adapter 172. Clamp 168 includes a support ring 174 and a retaining ring 176.

[0121] Pump assembly 10'' and pump assembly 10 (in Figure 3A (best visible in the middle) and pump assembly 10' ( Figures 16A-16C The two modules are essentially similar, namely, the pump module 14'' structurally supports the drive module 12''', wherein the drive module 12''' is mounted on the pump module 14''. The drive module 12''' is supported only by the pump module 14'', and not by any other structure outside the pump module 14''. The pump module 14'' itself is wholly or partially supported by the fluid tank 26.

[0122] Adapter 172 is supported by mounting base 40''. Piston assembly 72 extends through adapter 172. Adapter 172 may be in the form of a tube at least partially disposed within mounting base 40''. Guide bushing 178 is disposed within adapter 172 and engages with piston assembly 72. Guide bushing 178 facilitates alignment of piston assembly 72 on pump axis PA to maintain reciprocating motion of piston assembly 72 coaxial with pump axis PA. Guide bushing 178 further facilitates rotation of adapter 172 and drive module 12''' relative to piston assembly 72 and about pump axis PA, as discussed in more detail below. Fastener 120' is configured to engage with top surface of adapter 172. Fastener 120' can be locked to lock the orientation of drive module 12''' about pump axis PA. Fastener 120' can be unlocked to allow adapter 172 and drive module 12''' to rotate about pump axis PA while drive module 12''' remains mounted to pump module 14''. In the example shown, fastener 120' is located on mounting base 40'' and can be rotated to cover or expose a portion of adapter 172 to allow adapter 172 to be released relative to mounting base 40'' or to secure adapter 172 to mounting base 40''.

[0123] Drive module 12''' is connected to pump module 14'' via a static connection interface and a dynamic connection interface. In the illustrated example, the dynamic interface is formed by the head 84 of piston cap 78, which extends into the receiving slot 98 of connector 60. In the illustrated example, the static interface is formed between clamp 168 and drive module support 144'. Receiver 130'' of pump assembly 10'' is formed by clamp 168 and configured to engage with mounting bracket 170. Thus, receiver of pump assembly 10'' is formed on pump module 14'', and drive module 12''' includes an insert formed by mounting bracket 170. Drive module 12''' can be mounted to pump module 14'' by axial displacement relative to motor axis MA and lateral displacement relative to pump axis PA.

[0124] A clamp 168 is disposed on the exterior of the adapter 172. The exterior of the adapter 172 includes threads configured to engage with threads formed on one or both of the support ring 174 and the retaining ring 176. The support ring 174 can be statically connected to the adapter 172. The retaining ring 176 is disposed on the adapter 172 between the support ring 174 and the mounting base 40''. With the drive module 12''' mounted to the pump module 14'', the support ring 174 is disposed within the drive cavity 152 and the retaining ring 176 is disposed outside the drive cavity 152. A door 112 is movable to cover and expose the front opening 152 of the drive cavity. In the illustrated example, the door 112 is configured to pivot upwards and away from the front opening of the drive cavity 152 when moved from a closed position to an open position.

[0125] Mounting bracket 170 is formed around the bottom opening of drive chamber 152 and received in the gap between support ring 174 and retaining ring 176. Support ring 174 is configured to engage with the top surface of mounting bracket 170 and retaining ring 176 is configured to engage with the bottom surface of mounting bracket 170. Retaining ring 176 is movable relative to adapter 172 and along pump axis PA to change the size of the gap formed between support ring 174 and retaining ring 176. For example, retaining ring 176 can be rotated to screw retaining ring 176 upward toward support ring 174, thereby reducing the size of the gap and securing mounting bracket 170 between support ring 174 and retaining ring 176. Engagement of clamp 168 secures drive module 12''' to pump module 14'', while disengagement of clamp 168 allows drive module 12''' to be disengaged relative to pump module 14'' for separation. The interface between clamp 168 and drive module support 144' structurally connects drive module 12''' to pump module 14'', such that drive module 12''' is supported by pump module 14''. Clamp 168 further forms a locking interface 124 between drive module 12''' and pump module 14'', which prevents vertical displacement of drive module 12''' relative to pump module 14''. Although pump assembly 10'' is shown as including clamp 168 for forming a static connection, it is understood that other attachment mechanism options are possible. Furthermore, although clamp 168 is shown as including a threaded interface with adapter 172, it should be understood that not all examples are limited to this.

[0126] The entire drive module 12''' can rotate relative to the pump module 14'' about axis PA while the drive module 12''' is mounted to the pump module 14''. When the clamp 168 is in the fixed position, the drive module 12''' can rotate relative to the pump module 14'' about the pump axis PA. This allows the cantilever motor housing 86' to point at any angle within 360 degrees relative to the pump axis PA based on user preference. The drive module 12''' can initially be mounted to the pump module 14'' from any desired mounting orientation. The drive module 12''' can then be rotated about the pump axis PA to a desired operating orientation while supported by the pump module 14'', for example, when the clamp 168 is in the fixed position. The drive module 12''' can be rotated to the desired operating orientation while the drive module 12''' remains statically and dynamically connected to the pump module 14''. The fastener 120' can be locked to lock the orientation of the drive module 12''' relative to the pump module 14'' and thus prevent relative rotation.

[0127] Figure 18This is a perspective view of pump assembly 10'''. The drive module 12'''' and pump module 14''' of pump assembly 10''' are shown. The drive module support 144''' and the door 112 of drive module 12'''' are shown. The drive module support 144''' defines a drive chamber 152 and includes a post 154. The mounting base 40'' and piston cap 78 of pump module 14''' are shown. The mounting base 40'' includes a receiver 130' and an adapter 172'.

[0128] Pump assembly 10''' and pump assembly 10 (in Figure 3A (Best visible in the middle), pump assembly 10' ( Figures 16A-16C ) and pump assembly 10'' ( Figure 17A and 17B The two are essentially similar, namely, the pump assembly 10''' includes a pump module 14''' which structurally supports the drive module 12'''', wherein the drive module 12'''' is mounted on the pump module 14'''. The drive module 12'''' is supported only by the pump module 14''' and not by any other structure outside the pump module 14'''. The pump module 14''' itself is wholly or partially supported by the fluid tank 26. The drive module 12'''' can be installed onto and removed from the pump module 14''', while the pump module 14''' itself remains stationary, for example, by being mounted on and at least partially supported by the fluid tank 26.

[0129] The drive module 12'''' can be laterally displaced relative to the pump module 14''' during installation and removal. The drive module 12'''' is connected to the pump module 14''' via a static connection interface and a dynamic connection interface. The static connection interface is formed between the drive module support 144''' and the mounting base 40''. More specifically, the static connection interface is formed between the post 154 and the receiver 130'. The dynamic connection interface is formed between the piston assembly 72 and the connector 60 (e.g., Figure 12A , Figure 12B and Figure 16D (As best shown). More specifically, the dynamic connection interface is formed between the head 84 of the piston cap 78 and the slot 98 of the connector 60.

[0130] In the example shown, receiver 130' is formed as part of adapter 172'. When drive module 12'''' is mounted to pump module 14''', adapter 172' can rotate about pump axis PA. Thus, with post 154 positioned in the hole of receiver 130' and head 84 positioned in slot 98, drive module 12'''' can rotate about pump axis PA to any desired direction. By locking fastener 120', drive module 12''' can secure fastener 120' in the desired direction.

[0131] Although the invention has been described with reference to exemplary embodiments, those skilled in the art will understand that various changes can be made and its elements can be substituted with equivalents without departing from the scope of the invention. For example, while the fluid displacement member of the pump module has been described as a piston, other embodiments may include a diaphragm as a fluid displacement member connected to the drive shaft. Furthermore, many modifications can be made to adapt particular situations or materials to the teachings of the invention without departing from its essential scope. Therefore, the invention is intended to be limited to the specific embodiments disclosed, but rather to include all embodiments falling within the scope of the appended claims. Moreover, while some options are shown, these options are not required, and certain aspects may be deleted or replaced. For example, a bolt or thread may be shown as fastening two parts, but these parts may be fastened in other ways without departing from the scope of this disclosure.

Claims

1. A pump assembly configured to pump material from a fluid tank having an opening into the fluid tank, the pump assembly comprising: Pump module, the pump module comprising: Mounting base; A cylinder body extending from the mounting base along the pump axis in a first axial direction and configured to be at least partially disposed within the fluid tank; and A piston assembly extending into the cylinder body, the piston assembly configured to reciprocate along the pump axis to pump material from the fluid tank; and A drive module, detachably mountable to the pump module, the drive module comprising: An electric motor having a stator and a rotor configured to rotate about a rotation axis; A driver, connected to the electric motor and operably connected to the piston assembly via a dynamic interface, the driver being configured to convert the rotational output of the electric motor into a linear input to the piston assembly; and A drive module support is configured to engage with the mounting base at a static interface, wherein the drive module is supported by the pump module at the static interface.

2. The pump assembly according to claim 1, wherein, The drive module can be installed on the fluid module in multiple orientations.

3. The pump assembly according to claim 1, wherein, The dynamic interface is a slotted interface.

4. The pump assembly according to claim 3, wherein, The slotted interface is formed by the head of the piston assembly and the connector of the drive module, the connector including a slot for receiving the head.

5. The pump assembly according to claim 4, wherein, The driver includes a drive nut and a screw, wherein the connector is mounted to the screw.

6. The pump assembly of claim 1, further comprising: Fasteners that secure the drive module to the pump module to prevent the drive module from moving relative to the pump module.

7. The pump assembly according to claim 1, wherein: The mounting base includes a mounting plate; and The drive module support includes an upper plate.

8. The pump assembly according to claim 7, wherein, The entire weight of the drive module rests on the mounting plate of the pump module.

9. The pump assembly according to claim 7, wherein, The upper plate includes a lower flat surface, and the mounting plate includes an upper flat surface, with the lower flat surface resting directly on the upper flat surface.

10. The pump assembly of claim 1, wherein, The pump module remains stationary when the drive module is installed onto and removed from the pump module.

11. The pump assembly of claim 10, wherein, When the drive module is installed into and removed from the pump module, the pump module is secured to the fluid tank and is fully supported by the fluid tank.

12. The pump assembly according to claim 1, wherein, The pump module is configured such that the drive module can be mounted to the pump module from any direction around the pump module (360 degrees) for connection.

13. The pump assembly according to claim 1, wherein, When the drive module is mounted on the pump module, the drive module is able to rotate around the pump axis.

14. The pump assembly of claim 1, wherein, The drive module can be detached from the pump module in any direction around the pump module (360 degrees) to disengage it.

15. A pump assembly configured to pump material from a fluid tank having an opening into the fluid tank, the pump assembly comprising: Pump module, the pump module comprising: Mounting base; A cylinder body extending from the mounting base along the pump axis in a first axial direction and configured to be at least partially disposed within the fluid tank; and A piston assembly extending into the cylinder body, the piston assembly configured to reciprocate along the pump axis to pump material from the fluid tank; and A drive module, detachably mounted to the pump module, the drive module comprising: An electric motor having a stator and a rotor configured to rotate about a rotational axis, wherein the rotational axis is coaxial with the pump axis, and wherein the rotor is directly and vertically positioned above the piston assembly; and A drive module support is configured to engage with the mounting base at a static interface, wherein the drive module is supported by the pump module at the static interface.

16. The pump assembly of claim 15, wherein, The driver module also includes: A driver, connected to the electric motor and the piston assembly via a dynamic interface, is configured to convert the rotational output of the electric motor into a linear input to the piston assembly, wherein the driver vertically spans between the electric motor rotor and the piston assembly.

17. The pump assembly of claim 16, wherein, The driver includes a drive nut connected to a rotor that rotates together with the rotor, and the driver also includes a screw configured to be linearly displaced by the drive nut.

18. The pump assembly of claim 17, wherein, The dynamic interface is formed between the head of the piston assembly and the connector of the drive module, the connector including a slot for receiving the head, wherein the connector is keyed to the housing of the drive module to prevent the screw from rotating.

19. The pump assembly of claim 16, wherein, The electric motor includes a motor shaft disposed within the rotor and extending from the rotor toward the pump module, wherein the motor shaft is connected to the drive, and wherein the motor shaft engages with at least one bearing to support rotation of the rotor.

20. A pump assembly configured to pump material from a fluid tank having an opening into the fluid tank, the pump assembly comprising: Pump module, the pump module comprising: Mounting base; A cylinder body extending from the mounting base along the pump axis in a first axial direction and configured to be at least partially disposed within the fluid tank; and A piston assembly extending into the cylinder body, the piston assembly configured to reciprocate along the pump axis to pump material from the fluid tank; and A drive module, detachably mountable to the pump module, the drive module comprising: An electric motor having a stator and a rotor configured to rotate about a rotation axis, the rotor including an array of permanent magnets supported by a rotor body of the rotor, and the electric motor further including an electric motor shaft passing through the rotor; A bearing assembly connected to the motor shaft to receive rotational output from the rotor; A driver, connected to the bearing assembly to receive rotational output via the bearing assembly, and the driver connected to the piston assembly via a dynamic interface and configured to linearly move the piston assembly along the pump axis; and A drive module support is configured to engage with the mounting base at a static interface, wherein the drive module is supported by the pump module at the static interface; The bearing assembly is directly disposed between the rotor and the piston assembly, and the dynamic interface is disposed between the static interface and the bearing assembly.

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